WO2020013145A1 - Structure de surface de paroi et son procédé d'assemblage - Google Patents

Structure de surface de paroi et son procédé d'assemblage Download PDF

Info

Publication number
WO2020013145A1
WO2020013145A1 PCT/JP2019/027055 JP2019027055W WO2020013145A1 WO 2020013145 A1 WO2020013145 A1 WO 2020013145A1 JP 2019027055 W JP2019027055 W JP 2019027055W WO 2020013145 A1 WO2020013145 A1 WO 2020013145A1
Authority
WO
WIPO (PCT)
Prior art keywords
refractory
gap
holding
heat insulating
refractory material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/027055
Other languages
English (en)
Japanese (ja)
Inventor
義倫 山崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Power Ltd
Original Assignee
Mitsubishi Hitachi Power Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Hitachi Power Systems Ltd filed Critical Mitsubishi Hitachi Power Systems Ltd
Publication of WO2020013145A1 publication Critical patent/WO2020013145A1/fr
Priority to PH12020551769A priority Critical patent/PH12020551769A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
    • F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed

Definitions

  • the present disclosure relates to a wall structure and an assembling method thereof.
  • a boiler for example, a circulating fluid that improves combustion efficiency by flowing fuel and fluidized material (for example, particles mainly composed of SiO2 such as river sand) in a furnace by air supplied from the furnace bottom.
  • Fluidized material for example, particles mainly composed of SiO2 such as river sand
  • CFB Circulating Fluidized Bed
  • BFB Bubbling Fluidized Bed
  • a device for example, a cyclone for collecting and separating fluidized material and fuel conveyed by combustion gas and scattered from the furnace may be provided at the outlet side of the furnace provided in such a boiler.
  • the fluid and the fuel collected and separated by the cyclone are returned to the furnace and circulated. With this circulation system, the combustion efficiency of the boiler is improved.
  • the above-mentioned cyclone, the duct connecting the furnace and the cyclone, and other ducts connected to the cyclone may be made of a general structural steel plate. These configurations are exposed to high-temperature combustion gas during the normal operation of the boiler, so that a heat insulating material may be installed on the inner surface of the steel sheet for the purpose of protecting the steel sheet.
  • Insulation material is excellent in flexibility and heat insulation, but on the other hand, it is weak against erosion and abrasion. Therefore, fire protection material may be further applied to the inner surface of the heat insulation material for the purpose of heat insulation protection.
  • the heat insulation and refractory materials mentioned above can prevent the steel plate from becoming hot, but the refractory material installed on the innermost surface is exposed to high-temperature combustion gas, so the temperature is higher than the steel plate, Accordingly, the thermal elongation increases. Therefore, when constructing the refractory material, the refractory material is divided into a plurality of block-shaped refractory materials, and a gap is provided with respect to other adjacent refractory materials so that the refractory material is installed on the inner surface of the heat insulating material. I do. This gap is designed in consideration that when the refractory material thermally expands during normal operation of the boiler, the gap becomes narrower so that adjacent refractory materials do not come into contact with each other and interfere with each other.
  • the gap absorbs the thermal expansion of the refractory material, so that the restriction due to the thermal expansion between the refractory materials can be avoided. If the gap becomes narrower than expected and the refractory materials are constrained by thermal expansion, stress is generated in the compression direction on the refractory material. If the stress in the compression direction exceeds the allowable stress of the refractory material, the refractory material may be cracked, chipped, or dropped, and the heat insulating material and the steel sheet may not be properly protected.
  • the temperature when starting the boiler, the temperature is gradually raised to an appropriate temperature while circulating the fluid material.
  • the temperature of the combustion gas flowing through the cyclone and the duct is sufficiently lower than the temperature during normal operation, and the refractory material applied to the cyclone and the duct hardly thermally expands. That is, the interval between the gaps is substantially equal to that at the time of normal temperature.
  • Patent Literature 1 discloses a configuration in which a gap for absorbing thermal elongation is formed obliquely downward to make it difficult for the fluid to accumulate in the gap.
  • Patent Document 2 is not an invention relating to a boiler for forming a fluidized bed by flowing a fluidized material.
  • a gap between thermal expansion and a concrete plate of a side wall and a floor plate at about 180 ° C. is formed.
  • the configuration for opening is disclosed.
  • a packing having elasticity even under high temperature and high acidity is used in the gap in order to easily treat the thermal expansion of the concrete plate.
  • Patent Document 3 discloses that, at a plurality of circumferential positions of a frame constituting an inner peripheral edge and an outer peripheral edge of a hearth, gaps serving as expansion allowances of the frame are provided, and the gaps are filled with a ceramic sheet or the like. It is described that a small-diameter pellet is prevented from entering a gap.
  • Patent Literature 1 although the gap for absorbing thermal elongation is formed obliquely downward to make it difficult for the fluid to accumulate in the gap, for example, it is arranged so that the opening of the gap is positioned upward in the vertical direction. In such a case, there is a possibility that prevention of accumulation cannot be expected because the fluidized material does not fall by its own weight in the first place.
  • Patent Document 2 it is not assumed that particles mainly composed of SiO2 such as river sand flow, so that the elastic packing may be worn by collision of the particles.
  • Patent Document 3 in order to prevent intrusion of pellets into the gap of the refractory brick formed on the hearth, since the gap is simply filled with a ceramic sheet or the like, the ceramic sheet may be held in the gap. If it is not assumed and the structure is adopted in a part other than the hearth (for example, the top surface or side surface), the ceramic sheet will fall off due to its own weight, the ejector effect due to the flowing combustion gas, and the heat at startup There is a concern that the ceramic sheet may fall off due to movement due to the difference in expansion.
  • the present disclosure has been made in view of such circumstances, and in a region where a gas including a fluidized material flows, the fluidized material is deposited in a gap between heat-resistant materials regardless of an installation state or an operation state. It is an object of the present invention to provide a wall structure and a method for assembling the wall structure, which can prevent the occurrence of cracks and prevent the thermal expansion between the refractory materials.
  • the wall structure according to one embodiment of the present disclosure includes a steel plate, a heat insulating material disposed on a surface on the steel plate, and a plurality of refractory materials disposed at intervals on the surface on the heat insulating material, A buffer material is provided in a gap between the plurality of refractory materials facing a region where a gas containing a fluid material flows in contact with the refractory material, and a holding structure for holding the buffer material in the gap is provided. I have.
  • the wall surface structure includes a heat insulating material disposed on a surface on a steel plate, a plurality of refractory materials, and a plurality of refractory surfaces facing a region in which a gas including a flowing material flows in contact with the refractory material.
  • a gap for example, joint
  • a flexible cushioning material is installed in the gap between the refractory materials by a holding structure.
  • the flow material can be prevented from accumulating in the gaps due to the presence of the buffer material and restraining the thermal elongation between adjacent refractory materials.
  • the cushioning material since the cushioning material is installed in a state held in the gap by the holding structure, its own weight acts on the cushioning material, an attractive force due to the ejector effect due to the flow of the combustion gas acts, and the temperature rise. Even if the refractory material moves due to the difference in thermal expansion at the time, the buffer material does not fall out of the gap.
  • the cushioning material is a material having flexibility. For this reason, as described above, not only can the thermal expansion of the refractory material be absorbed, but also it can be easily installed in the gap due to its flexibility. For example, when the gap or the holding structure has a complicated shape, if the cushioning material is pushed into the gap, the cushioning material is flexibly deformed inside the gap to a shape matching the shape of the gap or the holding structure. Examples of the cushioning material include fibrous (cotton-like) ceramics and porous ceramics.
  • the holding structure includes a barbed pin provided in the gap.
  • the cushioning material can be reliably held in the gap between the refractory materials by the barbed pins.
  • the pin is, for example, a barbed pin made of a deformable metal.
  • the pin is provided for the refractory material.
  • the refractory material needs to be processed so that the pin can be installed.
  • the process for fixing the pin can be easily performed.
  • the pin is provided for the heat insulating material.
  • the pins are provided for the heat insulating material, even if it is necessary to replace the refractory material, the refractory material can be easily replaced. Further, since it is not necessary to perform processing for fixing the pins to the refractory material, the present invention can be easily applied to existing equipment in which the refractory material is already installed.
  • the holding structure includes a widening portion in which the gap widens from the region through which the gas containing the fluid flows, toward the heat insulating material.
  • the cushioning material when the cushioning material is installed in the widened portion having the shape of the gap formed by the refractory material, the cushioning material can be held in the portion where the gap is not widened (narrow portion). This is because the cushioning material is flexibly deformed according to the shape of the widened portion by pushing the cushioning material into the gap where the widened portion is formed. Since the widened portion is widened from the area (surface side) where the fluid material of the refractory material flows to the heat insulating material side, in other words, the widened portion allows the gas containing the fluid material to flow from the heat insulating material side.
  • the cushioning material When the cushioning material is deformed in accordance with the shape of the widened portion, the cushioning material is restrained in the direction from the heat insulating material side to the surface side of the refractory material and does not fall off. Thereby, the cushioning material is held in the gap. Therefore, it is not necessary to separately prepare a member for holding the cushioning material, and the construction cost can be reduced. In addition, since no separate member is provided inside the gap, there is no interference with the cushioning material when the cushioning material is pushed in, and the installation of the cushioning material becomes easier.
  • the cushioning material is a fibrous or porous ceramic.
  • a flexible cushioning material can be used.
  • the fibrous ceramic is made into a cotton-like shape, or if the material is made porous and elastic, the installation on the holding structure becomes easier.
  • the above-mentioned wall structure is a wall of a duct or a container connected to a furnace in which a gas containing the fluid material flows therein.
  • the method for assembling the wall structure includes a steel plate, a heat insulating material disposed on a surface on the steel plate, and a plurality of fireproof disposed at intervals on the surface on the heat insulating material.
  • Material a cushioning material facing a region in which a gas containing a flowing material flows in contact with the refractory material, and a cushioning material arranged in a gap between the plurality of refractory materials, and a holding structure for holding the cushioning material in the gap.
  • a method of assembling a wall structure comprising: installing the cushioning material on the holding structure.
  • the wall surface structure and the method of assembling the same in a region where a gas containing a fluidizing material flows, it is possible to prevent the fluidizing material from being deposited in gaps between heat-resistant materials regardless of an installation state or an operating state, It is possible to avoid restraint of thermal expansion between adjacent refractory materials.
  • FIG. 1 is a schematic configuration diagram of a power generation system according to an embodiment of the present disclosure.
  • FIG. 2 is a cross-sectional view of the refractory material of the wall structure according to the first embodiment of the present disclosure when no thermal elongation occurs.
  • FIG. 2 is a cross-sectional view when a refractory material having a wall structure according to the first embodiment of the present disclosure has undergone thermal expansion.
  • 1 is a cross-sectional view illustrating a holding structure according to a first embodiment of the present disclosure.
  • FIG. 5 is a cross-sectional view illustrating a modification of the holding structure according to the first embodiment of the present disclosure. It is the figure which looked at another modification of the holding structure concerning a 1st embodiment of this indication from the field side where a fluid flows.
  • FIG. 1 is a schematic configuration diagram of a power generation system according to an embodiment of the present disclosure.
  • FIG. 2 is a cross-sectional view of the refractory material of the wall structure according to the first
  • FIG. 10 is a cross-sectional view illustrating a holding structure according to a second embodiment of the present disclosure. It is a figure showing a modification of a holding pin with which a holding structure concerning a 2nd embodiment of this indication is provided.
  • FIG. 11 is a diagram illustrating another modified example of the holding pin included in the holding structure according to the second embodiment of the present disclosure. It is the figure which looked at the modification of the holding structure concerning a 2nd embodiment of this indication from the field side where a fluid flows.
  • FIG. 13 is a cross-sectional view illustrating a holding structure according to a third embodiment of the present disclosure.
  • FIG. 13 is a cross-sectional view illustrating a modification example of the holding structure according to the third embodiment of the present disclosure.
  • FIG. 13 is a cross-sectional view illustrating another modification of the holding structure according to the third embodiment of the present disclosure.
  • the power generation system 1 includes a circulating fluidized bed boiler (CFB: Circulating Fluidized Bed) 2 as a boiler that generates steam, and a steam turbine 3 that is rotationally driven by the steam generated by the circulating fluidized bed boiler 2. And a generator 4 for generating electric power by the driving force of the steam turbine 3.
  • CFB Circulating Fluidized Bed
  • the circulating fluidized bed boiler 2 has a fluidized bed furnace (hereinafter, referred to as a “furnace”) 5 in which fluidized sand (eg, particles mainly composed of SiO 2 such as river sand) is fluidized, and a fuel for supplying fuel to the furnace 5.
  • the fuel supply system includes a supply device 6, a flue 7 through which the combustion gas generated in the furnace 5 flows, and a plurality of heat exchangers 8 provided in the flue 7.
  • the circulating fluidized bed boiler 2 is capable of burning a wide range of fuels, and includes coal (bituminous coal, subbituminous coal, lignite, anthracite, etc.), petroleum coke, woody biomass, papermaking sludge, RPF (Refuse Paper & Plastic Fuel). , Waste tires, dewatered sludge, municipal waste, and the like.
  • the fuel supply device 6 shown in FIG. 1 is an example in which coal is used as fuel.
  • the fuel supply device 6 since the internal pressure of the furnace 5 is slightly higher than the atmospheric pressure, the fuel supply device 6 includes a rotary valve 10 and a seal air supply device (not shown) so that the combustion gas or the like does not flow back to the fuel supply system. Is provided.
  • the furnace 5 causes a fluidized material (fuel and fluidized sand) to flow by air (gas) supplied from an air nozzle 12 provided on the furnace bottom 11 to form a fluidized bed.
  • the circulating fluidized-bed boiler 2 promotes mixing of fuel, fluidized sand, and air in the furnace 5 (combustor) by forming a fluidized bed in this manner, thereby improving combustion efficiency.
  • air is supplied as a gas from the air nozzle 12, but when an inert gas (for example, nitrogen gas or the like) is introduced during purging in a furnace at the time of shutdown. There is also.
  • the circulating particles (fluid sand and unburned fuel) scattered together with the exhaust gas from the furnace 5 are conveyed by the combustion gas (gas), and the cyclone (container) 13 provided on the outlet side of the furnace 5 through the duct 30.
  • the fuel gas is separated into combustion gas and circulating particles.
  • the circulating particles separated and collected by the cyclone 13 are returned to the furnace 5 again through the seal pot 14 and the external heat exchanger 15.
  • the system for circulating the fluidized sand and the unburned fuel improves the combustion efficiency.
  • the temperature in the furnace 5 of the furnace 5 can be adjusted. Note that air for flowing the circulating particles is supplied from the air blower 17 to the external heat exchanger 15.
  • the combustion gas separated by the cyclone 13 flows through the flue 7, and flows through the heat exchanger 8 in the plurality of heat exchangers 8 provided in the flue 7 ( Heat exchange with, for example, water or steam).
  • heat exchanger 8 superheated steam is generated by heat exchange with the combustion gas.
  • the generated superheated steam is sent to the steam turbine 3 and drives the steam turbine 3 to rotate.
  • electric power is generated by a generator 4 coaxially connected to the steam turbine 3.
  • the combustion gas which has exchanged heat with the heat exchanger 8 passes through the air preheater 22 and the bag filter 23, and is then discharged to the atmosphere from a chimney (not shown).
  • the furnace 5 is provided with a plurality of air nozzles 12 for flowing the fluid therein and a combustion air supply unit 26 for supplying combustion air.
  • the furnace 5 used in the pulverized combustion system partially exceeds about 1500 ° C.
  • the furnace 5 used in the circulating fluidized bed boiler 2 has a uniform furnace temperature and, for example, 800 ° C. Controlled to ⁇ 900 ° C.
  • the amount of thermal NOx (NOx generated depending on the combustion temperature) can be suppressed, and the amount of NOx generated and the in-furnace desulfurization (CaCO 3 ⁇ CaO + CO 2 , CaO + SO 2 + 1 / 2O 2 ⁇ CaSO 4 ) can also be performed.
  • a plurality of combustion air supply units 26 are provided. Each of the combustion air supply units 26 injects a part of the air preheated by the air preheater 22 from an FDF (Forced @ Delivery @ Fan) 27 into the furnace as combustion air.
  • the jetted combustion air is distributed substantially uniformly to each combustion air supply unit 26 by the air chamber 28. Therefore, a uniform fluidized bed is formed in the furnace 5, and the temperature in the furnace becomes relatively uniform.
  • the air nozzles 12 are provided vertically through the furnace bottom 11 in the vertical direction, and a plurality (for example, several hundreds) of the air nozzles 12 are provided over the entire furnace bottom 11.
  • the upper part of the air nozzle 12 is located inside the furnace 5, and the lower part is located inside the wind box 29.
  • the air preheated and sent from the FDF 27 by the air preheater 22 is supplied to the inside of the furnace 5 by a plurality of air nozzles 12 via a wind box 29.
  • fluid material such as the cyclone 13 included in the power generation system 1 and the ducts 30 and 31 connected to the cyclone 13 is carried by a gas such as a combustion gas at 800 to 900 ° C.
  • a gas such as a combustion gas at 800 to 900 ° C.
  • the wall surface of the cyclone 13 will be described as an example, but this is not limited to the wall surface of the cyclone 13, and may be, for example, the wall surface of the duct 30 or the duct 31.
  • the wall structure 40 ⁇ / b> A has a layer structure including a steel plate 42, a heat insulating material 44, and a refractory material 46 in order from the outside to the inside of the cyclone 13. That is, the outer wall surface of the cyclone 13 is the steel plate 42, and the inner wall surface through which the combustion gas including the fluidized material such as the fluidized sand flows is the refractory material 46.
  • the steel plate 42 is, for example, a steel plate made of general structural carbon steel, and forms the outer shell of the container of the cyclone 13.
  • a heat insulator 44 is provided on the inner surface of the steel plate 42 for the purpose of protecting the steel plate 42.
  • the heat insulating material 44 is mainly composed of, for example, Al 2 O 3 (alumina), SiO 2 (silica), a mixture thereof, or the like, and a material having excellent heat insulating properties such as a low bulk density is employed. You.
  • the heat insulating material 44 is installed together with a refractory material 46 to be described later on the steel plate 42 by, for example, a Y-shaped anchor pin 50 fixed to the steel plate 42 at a predetermined pitch.
  • the Y-shaped anchor pins 50 having different lengths may be used to separately support the heat insulating material 44 and the refractory material 46 on the steel plate 42.
  • the heat insulating material 44 is excellent in heat insulating property, but is resistant to erosion and abrasion by particles such as fluidized sand and combustion ash contained in the cyclone 13 and the combustion gas flowing inside the ducts 30 and 31 connected to the cyclone 13. weak. Therefore, a refractory material 46 is provided on the inner surface of the heat insulating material 44 for the purpose of protecting the heat insulating material 44.
  • the thickness (the vertical direction shown in FIG. 2) of the heat insulating material 44 constructed on the steel plate 42 is about 200 mm to 400 mm.
  • the refractory material 46 is installed on the surface of the heat insulating material 44 opposite to the surface on which the steel plate 42 is located (the side on which the combustion gas flows).
  • the refractory material 46 has a block shape having a long side of about 1000 mm to 5000 mm and a thickness (up and down direction shown in FIG. 2) of about 50 mm to about 150 mm. , Left and right directions shown in FIG.
  • the refractory material 46 is installed on the heat insulating material 44 by the anchor pins 50 that fix the heat insulating material 44 to the steel plate 42.
  • the gap between the refractory materials 46 is, for example, a joint 52.
  • the width of the joint 52 is, for example, about 5 mm to about 20 mm.
  • the joint 52 is set so as to absorb the thermal elongation of the refractory material 46 in the surface direction from the start of the boiler 2 to the normal operation so as not to cause interference between adjacent refractory materials 46. This is the gap (see FIG. 3).
  • the joint 52 can be appropriately changed depending on the size, properties and shape of the refractory material 46.
  • the refractory material 46 may be formed, for example, by pouring into a mold temporarily provided on the heat insulating material 44. Alternatively, a separately manufactured block-shaped refractory material 46 may be attached.
  • the wall structure 40 ⁇ / b> A includes a cushioning material 48 installed on the joint 52.
  • the buffer material 48 is made of, for example, a fibrous ceramic mainly composed of Al2O3 (alumina), SiO2 (silica), MgO (magnesia), CaO (calcia), and a mixture thereof, with a bulk density of about 100 kg / m @ 3. It is formed in a flocculent or porous form of about 500 kg / m @ 3, and has flexibility.
  • the cushioning material 48 is not limited to these materials. If the refractory material 46 does not undergo thermal expansion, the bulk density is low enough to prevent liquid sand from entering the joint 52, or higher. And a flexible material that can shrink to the extent that it does not restrict the thermal expansion of the refractory material 46 when the refractory material 46 undergoes thermal expansion as shown in FIG. good.
  • the holding structure 54 ⁇ / b> A has a barbed pin having both ends inserted into a movable hole 58 formed on the side surface of the refractory material 46 that faces the joint 52 (the buffer material 48). (Pins) 56 are provided.
  • the holding pin 56 is a thin pin having a main body 56a in a rod shape, and a plurality of barbs 56b are formed around the pin in a radial direction.
  • the holding pin 56 preferably has oxidation resistance to high-temperature combustion gas, and is made of, for example, metal and stainless steel.
  • the holding pin 56 has a lower rigidity than the refractory material 46 so as not to restrain the thermal expansion of the refractory material 46, and when thermal deformation of the refractory material 46 occurs, It is preferable that the refractory material 46 be deformable without damaging it.
  • the plurality of holding pins 56 are provided at predetermined intervals in the direction perpendicular to the paper surface shown in FIG.
  • the movable hole 58 is provided on the side surface of the refractory material 46 facing the joint 52 (the buffer material 48), and is formed so that the depth direction thereof matches the longitudinal direction of the holding pin 56.
  • the distance from the bottom wall 58a of the movable hole 58 formed in the one refractory material 46 to the bottom wall 58a of the movable hole 58 formed in the other refractory material 46 opposite thereto is longer than the length of the holding pin 56 in the longitudinal direction.
  • the inside diameter of the movable hole 58 is set to be larger than the outside diameter of the holding pin 56.
  • the holding pin 56 can be moved in the longitudinal direction while being disposed inside the joint 52, so that even when the refractory material 46 undergoes thermal expansion, the retaining pin 56 restrains the thermal extension of the refractory material 46. Therefore, it is possible to prevent the refractory material 46 and the holding pin 56 from being damaged.
  • the cushioning member 48 Since the cushioning member 48 has excellent flexibility as described above, the cushioning member 48 can be pushed from the inside of the cyclone 13 into the joint 52 where the holding pin 56 is installed.
  • the cushioning material 48 pushed into the joint 52 flexibly deforms into a shape corresponding to the shape of the joint 52 and the holding pin 56 inside the joint 52. As a result, the cushioning material 48 is caught by the barbs 56 b of the holding pins 56 and is thus held by the joint 52.
  • the holding pins 56 are installed in the movable holes 58 as follows, for example.
  • a flexible and easily burnable protective material such as paper adapted to the shape of the movable hole 58 is wound around both ends of the holding pin 56.
  • the refractory material 46 is formed by pouring into a mold, pouring is performed in a state where the holding pins 56 around which paper or the like is wound are disposed at both ends. Thereby, the refractory material 46 to which the holding pins 56 are fixed via the paper or the like is formed.
  • the holding pin 56 may be provided in the movable hole 58 as follows, for example.
  • a mounting space 60 as shown in FIG.
  • the mounting space 60 is formed on the inner side of the cyclone 13 where the combustion gas flows, rather than the movable hole 58, and the movable hole 58 has a narrower width in the longitudinal direction than the length of the holding pin 56 in the longitudinal direction.
  • the space is connected to the hole 58.
  • the present embodiment has the following advantages.
  • the elasticity of the buffer material 48 absorbs the thermal expansion between the adjacent refractory materials 46 from the start of the boiler 2 to the normal operation.
  • the fluid material can be prevented from being deposited on the joint 52 due to the presence of the buffer material 48.
  • the cushioning member 48 since the cushioning member 48 is installed while being held at the joint 52 by the holding pin 56 provided in the holding structure 54A, the buffer member 48 may be subjected to its own weight or may be caused by the ejector effect due to the flow of the combustion gas. Even if an attractive force is applied or the refractory material 46 moves due to thermal expansion, the buffer material 48 does not fall off from the joint 52. That is, it is possible to prevent the flow material from accumulating in the gaps regardless of the installation state or the operation state, and to avoid restraint of the thermal expansion between the refractory materials 46.
  • the cushioning material 48 is a flexible material. Therefore, as described above, the refractory material 46 can not only absorb the thermal elongation but also can be easily installed on the joint 52 by its flexibility. For example, when the joint 52 and the holding pin 56 of the holding structure 54A have a complicated shape, if the cushioning material 48 is pushed into the gap, the cushioning material 48 matches the shape of the joint 52 and the holding pin 56 inside the joint 52. It is flexibly deformed into the shape of the cushioning material 48.
  • the holding pin 56 When the holding pin 56 is installed on the refractory material 46, only the refractory material 46 needs to be processed so that the holding pin 56 can be installed. For example, when the refractory material 46 is formed by casting, the holding pin 56 The movable hole 58 and the mounting space 60 for fixing the head can be easily formed.
  • the holding pins 56 are arranged so that the longitudinal direction thereof is along the longitudinal direction of the joint 52. May be.
  • one end of both ends of the holding pin 56 is bent at a substantially right angle toward one refractory material 46, and the other end of the holding pin 56 faces the one refractory material 46 with the joint 52 interposed therebetween.
  • the holding pin 56 is bent at a substantially right angle toward the refractory material 46, and each end of the holding pin 56 is installed in a movable hole 58 formed in each refractory material 46.
  • the holding pins 56 are installed on the refractory material 46.
  • FIGS. 7 to 10 a second embodiment of the present disclosure will be described with reference to FIGS. 7 to 10.
  • the wall structure 40B of the present embodiment differs from the first embodiment in the form of the holding pins 56, and is otherwise the same. Therefore, only the differences from the first embodiment will be described, and the other portions will be denoted by the same reference numerals and description thereof will be omitted.
  • the wall structure 40B includes, as the holding structure 54B, a holding pin 56 with barbs installed on the heat insulating material 44.
  • the holding pin 56 is a thin pin whose longitudinal direction coincides with the thickness direction of the refractory material 46, and a plurality of barbs 56b are formed around the pin in the radial direction.
  • the holding pin 56 preferably has oxidation resistance to high-temperature combustion gas, and is made of, for example, metal and stainless steel.
  • the heat insulating material 44 is provided with a hole through which the holding pin 56 can be inserted and fixed from the side where the refractory material 46 is installed. When the holding pin 56 is pushed into the hole, the holding pin 56 is fixed to the heat insulating material 44.
  • the holding pin 56 has a lower rigidity than the refractory material 46 so as not to restrain the thermal expansion of the refractory material 46, and the thermal deformation of the refractory material 46 occurs. Sometimes, it is preferable that the refractory material 46 be deformable without damaging it.
  • the plurality of holding pins 56 are provided at predetermined intervals in the direction perpendicular to the paper surface shown in FIG.
  • the holding pin 56 is not limited to a pin with a barb as shown in FIG. 7, but may be a pin with a barb as shown in FIG. 8 or a spring-shaped tip as shown in FIG. It may be a pin processed into a shape. In addition, any pin may be used as long as it is processed so that the cushioning member 48 provided at the joint 52 is held in the cyclone 13 without falling off.
  • the present embodiment has the following advantages.
  • the thermal expansion between the refractory materials 46 is absorbed by the flexibility of the buffer material 48 from the start of the boiler 2 to the normal operation.
  • the fluid material can be prevented from being deposited on the joint 52 due to the presence of the buffer material 48.
  • the cushioning member 48 since the cushioning member 48 is installed in a state of being held at the joint 52 by the holding pin 56 provided in the holding structure 54B, the buffer member 48 may be subjected to its own weight or may be caused by the ejector effect due to the flow of the combustion gas.
  • the buffer material 48 does not fall off from the joint 52. That is, it is possible to prevent the flow material from accumulating in the gaps regardless of the installation state or the operation state, and to avoid restraint of the thermal expansion between the refractory materials 46.
  • the cushioning material 48 is a flexible material. Therefore, as described above, the refractory material 46 can not only absorb the thermal elongation but also can be easily installed on the joint 52 by its flexibility. For example, when the joint 52 and the holding pin 56 of the holding structure 54B have a complicated shape, if the cushioning material 48 is pushed into the gap, the cushioning material 48 matches the shape of the joint 52 and the holding pin 56 inside the joint 52. It is flexibly deformed into the shape of the cushioning material 48.
  • the holding pins 56 are installed with respect to the heat insulating material 44, even if the refractory material 46 needs to be replaced, the refractory material 46 can be easily replaced. Further, it is not necessary to perform a process for fixing the pins on the side surfaces of the refractory material 46, and it is only necessary to provide a hole that allows the holding pins 56 to be pressed into the heat insulating material 44 and fixed, so the refractory material 46 is already installed. It can be easily applied to existing equipment.
  • the holding pins 56 may be arranged so that the longitudinal direction thereof is along the joint 52.
  • the fixing pin 62 is pressed into a hole provided in the heat insulating material 44 and fixed.
  • the holding pins 56 are installed on the heat insulating material 44.
  • the fixing pin 62 is, for example, a pin-shaped member that is fixed to the heat insulating material 44 and extends in the thickness direction of the refractory material 46 (the direction perpendicular to the paper surface of FIG. 10), and has oxidation resistance to high-temperature combustion gas. It is preferable to use, for example, a stainless steel material made of metal.
  • the joint 52 widens in the thickness direction of the refractory material 46 from the inner side of the cyclone 13 where the combustion gas flows as the holding structure 54C toward the heat insulating material 44.
  • An enlarged portion 64 is provided.
  • the widened portion 64 forms a part of the joint 52, and a section where the width of the joint 52 is constant from the surface of the refractory material 46 inside the cyclone 13 toward the heat insulating material 44 (reducing portion 65. )It is connected to the.
  • the widened portion 64 expands from the reduced portion 65 to the heat insulating material 44 side such that the interval between the side surfaces of the two refractory materials 46 opposed to each other with the joint 52 (the buffer material 48) interposed therebetween, that is, the width of the joint 52 widens. It is formed as follows.
  • the width of the joint 52 is reduced from the heat insulating material 44 side to the reduced portion 65 located on the surface side where the combustion gas of the refractory material 46 flows.
  • the width of the joint 52 in the reduced portion 65 is set, for example, from about 5 mm to about 20 mm, and is set so as to absorb the thermal expansion of the refractory material 46 from the start of the boiler 2 to the normal operation. It is a gap.
  • the widened portion 64 may be formed, for example, simultaneously with pouring the refractory material 46 into the mold.
  • the cushioning member 48 Since the cushioning member 48 has excellent flexibility as described above, it can be pushed into the joint 52 provided with the widened portion 64 from the inside of the cyclone 13.
  • the pushed-in cushioning material 48 flexibly deforms into a shape matching the shape of the joint 52 and the widened portion 64 inside the joint 52 and the widened portion 64. Since the joint 52 of the widened portion 64 is narrowed from the heat insulating material 44 toward the reduced portion 65, the cushioning material 48 is restrained in the direction from the heat insulating material 44 toward the reduced portion 65 and does not fall off.
  • the present embodiment has the following advantages.
  • the elasticity of the buffer material 48 absorbs the thermal expansion between the adjacent refractory materials 46 from the start of the boiler 2 to the normal operation.
  • the fluid material can be prevented from being deposited on the joint 52 due to the presence of the buffer material 48.
  • the cushioning member 48 since the cushioning member 48 is installed in a state where it is held at the joint 52 by the widened portion 64 provided in the holding structure 54C, its own weight acts on the cushioning member 48, and the cushioning member 48 is caused by the ejector effect due to the flow of the combustion gas.
  • the buffer material 48 does not fall off from the joint 52. That is, it is possible to prevent the flow material from accumulating in the gaps regardless of the installation state or the operation state, and to avoid restraint of the thermal expansion between the refractory materials 46.
  • the widened portion 64 does not need to be widened over the entire section on the heat insulating material 44 side from the reduced portion 65 as shown in FIG. 11, and as shown in FIGS.
  • a reduced portion 65 narrower than the widened portion 64 provided on the heat insulating material 44 side of the refractory material 46 may be provided in at least a part of the section.
  • the present disclosure is not limited to the invention according to each of the above-described embodiments, and can be appropriately modified without departing from the gist thereof.
  • a fluidized bed boiler BFB: Bubbling Fluidized Bed.
  • the horizontal direction (plane direction) in FIGS. 2 to 5, 7 and 11 to 13 does not always coincide with the actual horizontal direction, and varies depending on the installation state of the wall structure 40.
  • the wall surface structure 40 may be a curved surface which is not a flat surface but a cylindrical inner surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Building Environments (AREA)

Abstract

L'invention concerne : une structure de surface de paroi dans laquelle il est possible, dans une région à travers laquelle s'écoule un gaz contenant un matériau en écoulement, d'empêcher le dépôt du matériau en écoulement dans un espace entre des matériaux résistant à la chaleur indépendamment d'un état d'installation ou d'un état de fonctionnement, et d'éviter la restriction de l'allongement thermique de matériaux réfractaires ; et un procédé d'assemblage de la structure de surface de paroi. La présente invention comprend : une tôle d'acier ; un matériau d'isolation thermique disposé sur la surface de la tôle d'acier ; une pluralité de matériaux réfractaires (46) disposés à des intervalles donnés sur la surface du matériau d'isolation thermique ; un matériau d'amortissement (48) disposé dans des espaces entre la pluralité de matériaux réfractaires (46), le matériau d'amortissement (48) étant en contact avec les matériaux réfractaires (46) et faisant face à une région à travers laquelle s'écoule un gaz contenant un matériau en écoulement ; et une structure de retenue (54) destinée à retenir le matériau d'amortissement (48) dans les espaces.
PCT/JP2019/027055 2018-07-13 2019-07-08 Structure de surface de paroi et son procédé d'assemblage Ceased WO2020013145A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PH12020551769A PH12020551769A1 (en) 2018-07-13 2020-10-23 Wall structure and assembly method for the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018133158A JP6441530B1 (ja) 2018-07-13 2018-07-13 壁面構造およびその組み付け方法
JP2018-133158 2018-07-13

Publications (1)

Publication Number Publication Date
WO2020013145A1 true WO2020013145A1 (fr) 2020-01-16

Family

ID=64668705

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/027055 Ceased WO2020013145A1 (fr) 2018-07-13 2019-07-08 Structure de surface de paroi et son procédé d'assemblage

Country Status (3)

Country Link
JP (1) JP6441530B1 (fr)
PH (1) PH12020551769A1 (fr)
WO (1) WO2020013145A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113356990B (zh) * 2021-07-29 2022-07-29 中国电建集团河南工程有限公司 一种燃机排气扩散段内部保温结构及施工方法
KR102403668B1 (ko) * 2021-12-28 2022-05-30 강신명 순환유동층보일러의 열교환기용 댐을 형성하기 위한 내화 구조물

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53128931U (fr) * 1977-03-19 1978-10-13
JPS5913856U (ja) * 1982-07-19 1984-01-27 財団法人電力中央研究所 高熱曝露壁面の熱遮断構造
JPH01134197A (ja) * 1987-11-19 1989-05-26 Shinagawa Refract Co Ltd セラミックファイバーによる炉壁構造およびその施工方法
JPH0525145U (ja) * 1991-08-16 1993-04-02 三菱重工業株式会社 耐火ブロツク脱落防止機構
JPH0534430U (ja) * 1991-10-15 1993-05-07 株式会社プランテツク ごみ焼却炉の側壁構造
JP2000186811A (ja) * 1998-12-21 2000-07-04 Hec Corp 焼却炉壁構造
JP2002206705A (ja) * 2001-01-11 2002-07-26 Sumitomo Heavy Ind Ltd 流動床炉およびサイクロン
JP2004089808A (ja) * 2002-08-30 2004-03-25 Mitsubishi Heavy Ind Ltd 清掃システム
JP2004092965A (ja) * 2002-08-30 2004-03-25 Mitsubishi Heavy Ind Ltd 耐火材構造物の過大変形防止構造

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53128931U (fr) * 1977-03-19 1978-10-13
JPS5913856U (ja) * 1982-07-19 1984-01-27 財団法人電力中央研究所 高熱曝露壁面の熱遮断構造
JPH01134197A (ja) * 1987-11-19 1989-05-26 Shinagawa Refract Co Ltd セラミックファイバーによる炉壁構造およびその施工方法
JPH0525145U (ja) * 1991-08-16 1993-04-02 三菱重工業株式会社 耐火ブロツク脱落防止機構
JPH0534430U (ja) * 1991-10-15 1993-05-07 株式会社プランテツク ごみ焼却炉の側壁構造
JP2000186811A (ja) * 1998-12-21 2000-07-04 Hec Corp 焼却炉壁構造
JP2002206705A (ja) * 2001-01-11 2002-07-26 Sumitomo Heavy Ind Ltd 流動床炉およびサイクロン
JP2004089808A (ja) * 2002-08-30 2004-03-25 Mitsubishi Heavy Ind Ltd 清掃システム
JP2004092965A (ja) * 2002-08-30 2004-03-25 Mitsubishi Heavy Ind Ltd 耐火材構造物の過大変形防止構造

Also Published As

Publication number Publication date
JP6441530B1 (ja) 2018-12-19
PH12020551769A1 (en) 2021-07-12
JP2020012565A (ja) 2020-01-23

Similar Documents

Publication Publication Date Title
TW571049B (en) Circulating fluidized bed boiler
US20140352634A1 (en) Method and Apparatus for Improved Firing of Biomass and Other Solid Fuels for Steam Production and Gasification
CN114729744A (zh) 具有次级气流的生物质加热系统及其部件
JP6199174B2 (ja) ボイラ設備
JP5410590B2 (ja) 発電所用ボイラーの炉
WO2020013145A1 (fr) Structure de surface de paroi et son procédé d'assemblage
JP5473228B2 (ja) 耐火材支持構造
JP2011220541A (ja) ボイラ設備
US5769035A (en) Boiler furnace puff sootblower
JP6388555B2 (ja) バイオマスガス化システム及びこれを用いるボイラ設備
JP6109718B2 (ja) ボイラ
JP3897664B2 (ja) 耐火材構造物の過大変形防止構造
JP4295286B2 (ja) 旋回溶融炉を備えたボイラ構造
JP6284345B2 (ja) ボイラ
JP6087796B2 (ja) ボイラ
JP5881584B2 (ja) ボイラ
JP6087793B2 (ja) ボイラ
JPH0972503A (ja) 微粉炭燃焼方法及び装置
JP2025144092A (ja) 清掃装置
JP6653186B2 (ja) 耐火構造物
JP5595089B2 (ja) ガス化炉及びボイラ設備
JP5733906B2 (ja) ボイラ設備
CN114294646A (zh) 风室及循环流化床锅炉
JP2020183826A (ja) 火炉及びそれを備えたボイラ
JP5886144B2 (ja) 廃棄物処理装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19833723

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19833723

Country of ref document: EP

Kind code of ref document: A1