EP3408357A1 - Verfahren zur vergasung von kohlenstoffhaltigen materialien und vorrichtungen zur umsetzung des verfahrens - Google Patents
Verfahren zur vergasung von kohlenstoffhaltigen materialien und vorrichtungen zur umsetzung des verfahrensInfo
- Publication number
- EP3408357A1 EP3408357A1 EP17710588.9A EP17710588A EP3408357A1 EP 3408357 A1 EP3408357 A1 EP 3408357A1 EP 17710588 A EP17710588 A EP 17710588A EP 3408357 A1 EP3408357 A1 EP 3408357A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- space
- gasification
- gases
- gasifier
- coal
- 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.)
- Withdrawn
Links
- 238000002309 gasification Methods 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000003575 carbonaceous material Substances 0.000 title claims description 31
- 239000007789 gas Substances 0.000 claims abstract description 262
- 239000000463 material Substances 0.000 claims abstract description 108
- 239000003245 coal Substances 0.000 claims abstract description 85
- 238000001035 drying Methods 0.000 claims abstract description 64
- 238000003763 carbonization Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims description 46
- 239000002956 ash Substances 0.000 claims description 42
- 239000000203 mixture Substances 0.000 claims description 29
- 238000002485 combustion reaction Methods 0.000 claims description 28
- 230000001590 oxidative effect Effects 0.000 claims description 21
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 20
- 239000007800 oxidant agent Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000000446 fuel Substances 0.000 claims description 16
- 230000033001 locomotion Effects 0.000 claims description 14
- 230000036961 partial effect Effects 0.000 claims description 13
- 206010015137 Eructation Diseases 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002028 Biomass Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000000571 coke Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 239000003517 fume Substances 0.000 claims description 4
- 230000032258 transport Effects 0.000 claims description 4
- 210000002268 wool Anatomy 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000003303 reheating Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 230000005587 bubbling Effects 0.000 claims description 2
- 239000006227 byproduct Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 238000012432 intermediate storage Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 claims description 2
- 230000002441 reversible effect Effects 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 238000010891 electric arc Methods 0.000 claims 2
- 239000005539 carbonized material Substances 0.000 claims 1
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 claims 1
- 230000005484 gravity Effects 0.000 claims 1
- 231100001261 hazardous Toxicity 0.000 claims 1
- 238000012423 maintenance Methods 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000000197 pyrolysis Methods 0.000 description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- -1 but also lignites Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
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- 239000010791 domestic waste Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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- 238000003892 spreading Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
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- 238000012549 training Methods 0.000 description 1
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- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/002—Horizontal gasifiers, e.g. belt-type gasifiers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
- C10J3/22—Arrangements or dispositions of valves or flues
- C10J3/24—Arrangements or dispositions of valves or flues to permit flow of gases or vapours other than upwardly through the fuel bed
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/12—Heating the gasifier
- C10J2300/1215—Heating the gasifier using synthesis gas as fuel
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
- C10J2300/1606—Combustion processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water
- C10J2300/1823—Recycle loops, e.g. gas, solids, heating medium, water for synthesis gas
Definitions
- the technical field of the invention which is the subject of this patent is the gasification of carbonaceous material.
- the carbonaceous material gasification is the transformation of solid or liquid carbonaceous material into a gas (which we will call gasification gas), possibly accompanied by the production of one or more by-products or wastes.
- the gasification of carbonaceous material is mainly considered to derive a fuel gas used to power an engine, a turbine, a boiler, a burner. It is also considered to produce a liquid or gaseous fuel (methanation for example).
- carbonaceous materials that can be gasified include but are not limited to: powder or pieces of biomass, coal, coke, plastic, miscellaneous waste.
- the gasification process object of the present patent makes the devices that implement it capable of producing a gasification gas "clean pyroligneux" while avoiding to melt or agglomerate the ash from possible incombustibles present in the carbonaceous matter that is gasified.
- the carbonaceous material gasification process that is the subject of this patent distinguishes different spaces in which different stages of gasification take place and are favored because of the chemical and thermal conditions that prevail in these spaces.
- the materials and gases circulate in an organized and possibly forced way between these spaces.
- the material to be gasified is in a layer that advances in the space or spaces it has to travel from the point of entry of the material in the gasifier to the point where leaves what remains after the gasification of the material: a mixture of coal and ash mixed with the inerts which have been introduced with the material to be gasified.
- the gases pass through the layer of material, traversing it transversely from the "top of the layer” to the "bottom of the layer", pushed by a means of movement called "main fan".
- the first step of the process takes place in a space (1) that will be called “gasification-carbonization-drying" space.
- This space which contains a part of the layer of matter and the areas that immediately surround it, receives high temperature gases from another space that is called the “high temperature gas elevation” space. we will describe later.
- These gases arrive on the material by the so-called “top of the layer” by which the gas enters the layer of the material introduced into the gasifier.
- the very hot gas starts by drying, if the incoming material is not dry, the material on the surface, then warms it and carbonizes it. A little further in the direction of the advance of the layer, the very hot gas arrives on an already dry material and even carbonized (this due to the advancement of the layer of material). He then carbonates a part of it.
- the gases After having passed through the layer of material to be gasified in the "gasification - carbonization - drying" space, the gases exit "below” the layer of material. They are then sucked by a means of gas movement that sucks them to cross the layer of material located in the "gasification-carbonization-drying" space and pushes the gas that it has sucked to enter in the "high temperature gas elevation" space.
- This means is advantageously a fan (5) called “main fan”.
- These gases are a mixture of coal gasification gas, gas pyrolysis of the material introduced into the gasifier and drying gas of this material, which can be observed that the temperature (averaged over the entire length of the layer which is in the space of "gasification-carbonization-drying") is between 250 ° C and 800 ° C.
- the high value of this temperature requires that the means for moving the gas used, which may be a fan, can operate at a temperature of 800 ° C.
- the sucked gas can contain dust that has not been retained by the layer of material, the dust it contains can be deposited, as well as pyroligneous on the elements of the device, for example on the blades of the fan and the unbalance.
- a radial fan with a temperature resistance of 800 ° as the "main fan".
- the bearings of this fan must be carefully cooled because there is no bearing running sustainably at 800 ° C.
- a temperature of 800 ° C temperature of the wheel
- the axis will advantageously comprise one or more sections of "drop in temperature”. These sections will advantageously welded assemblies of tubes and cones made of refractory steel sheet (thin, so that it does not transmit too much heat), filled with refractory wool. These sections join the fan wheel to the rest of the axis passing through the fan bearings.
- the axis is cooled in its part passing through the bearings.
- a particularly high temperature gas raising means that appears to be particularly simple is the partial oxidation of gases from the "high temperature gas raising" space by means of flame stabilization and homogeneous combustion techniques.
- This elevation of the gas temperature of the "gas elevation at high temperature” space is obtained by the partial combustion of a certain amount of the gas (also called “fuel”) rotating in the chamber which materializes the space “elevation of gases at high temperature”, permitted by the introduction into the chamber of a certain quantity of oxidizing gas (called also oxidizing), possibly after reheating obtained by passing through an exchanger. It ensures that the fuel and the oxidant are vigorously mixed with the gases rotating in the chamber, so that the combustion takes place fairly quickly.
- the intimate and rapid contact of the gases is made in the "elevation of the gases at high temperature” space by bringing the gases pushed by the "main fan” into the chamber (which has sucked them into the chamber). bottom of the “gasification-carbonization-drying” space), as well as the oxidant, by one or more fins-shaped ducts penetrating deeply into the "high temperature gas raising" chamber, at the end of which are arranged orifices, so that the turbulence surrounding the jets ensure the mixing of the introduced gases and very hot gases that rotate in the "elevation of the gases at high temperature” chamber.
- the mixing must take place quickly enough so that if possible in less than half a turn of the gases in the chamber, the temperature of the mixture is such that the combustion reaction takes place.
- the introduction into the chamber of gases from the "gasification-carbonization-drying" space and the introduction into this chamber of the oxidant are made by orifices that are small enough for the injection speeds to be very different from the speeds from the overall flow in the chamber to the places where the injection takes place.
- the orifices must also be oriented so as to inject the gases in the direction and direction of the flow.
- the gas introduction ports may be elongated, circular or other.
- the velocities of the gases in the orifices, the number, the dimensions and the orientations of the orifices must be such that the quantity of movement transferred from the incoming gases to the gases that rotate in the chamber is sufficient to ensure that, despite the pressure drops due to the presence of the ducts, possibly in the form of fins) in the rotating flow increased by those due to the presence of the walls, the rotational movement in the chamber remains of sufficient intensity.
- the regulation of the gas temperature of the "elevation of the gas at high temperature" space is done by regulating the amount of oxidizing gas injected.
- the oxidizing gas may advantageously have been, before it is introduced into the chamber, reheated, for example by passing through a heat exchanger transferring heat from the gas leaving the gasifier to the gas containing the oxidant.
- Plasma arc or electrical resistance It is also possible to obtain the rise in temperature of the gases in the "elevation of the gases at high temperature” space by an electric heat supply: plasma arc or high temperature electrical resistance.
- electric heating it is possible to regulate the temperature of the gases in the chamber of the "high temperature gas raising" space by adjusting the power of the electric heating device.
- the "gasification of coal” space is advantageously geometrically in the extension of the "gasification-carbonization-drying" space (FIGS. 3, 4, 8).
- the grid that supports the layer of material in the "gasification of coal” space can advantageously be an extension of that which supports the layer of material in the "gasification-carbonization-drying" space.
- the "gasification-carbonization-drying" and “gasification of coal” spaces are above a rotating circular grid that carries with it the layer of matter from the entrance of the material (where the material falls on the grid) to the outlet of the charcoal-ash mixture (where the charcoal-ash mixture is ejected).
- the "gasification of coal” space is not essential for the process: In the case where one only seeks to produce heat with the biomass that one gasifies, one is not obliged to pass the gases (which go towards the boiler or to another thermal use) by a "gasification of coal” space. Some of the gases leaving the "high temperature gas elevation” space go into the "gasification-carbonization-drying" space and the other part is sent directly to the boiler in which these gases will be produced. subject of a post-combustion.
- finishing takes place in a space called “finishing space” in which we introduce the mixture of ash and coal that comes out at the end of the "gasification” space. coal "if there is one or at the end of the" gasification - carbonization - drying "space if there is no” gasification of coal "space.
- the "finishing" space allows for the depletion of coal ash and / or the cooling of the mixture of ash and coal that comes out at the end of the layer of material undergoing or having undergone gasification.
- This space may advantageously be provided with a column on top of which is introduced the mixture of ash and coal and at the bottom of which the ash is extracted (or almost) coal and / or a mixture of coal and ash , pretty cool.
- it can also be equipped with a more complicated system, such as, for example, a column with permeable walls supplemented by a recirculation fan and a heat exchanger. In this case, the mixture of ash and coal goes down in the column.
- This column with permeable walls is traversed by gases recycled by a fan and which are, themselves, cooled by a sealed exchanger placed in their path. In the permeable column, the mixture of charcoal and ash may gradually burn to coal and / or cool.
- the humidification is advantageously by bubbling (prior to the introduction of the mixture into the finishing space) air in a water advantageously around 80 ° C.
- the quantity of air and the quantity of associated water introduced into the "finishing" space will be proportioned so that the oxygen content of the gas leaving the finishing space is as small as possible.
- the gas leaving the "finishing" space is in fact mixed with the gas leaving the "elevation of the gas at high temperature” space and is, therefore, reintroduced into the whole of the gas circulation which takes place in the gasifier. If the amount of oxygen it contains is quite low, this introduction does not have a negative impact on the process
- a cyclone fluidized bed gasifier in which the layer of material to be gasified is suspended in a cyclonic gas flow.
- Devices used in the various sets of devices for carrying out the process a device which allows the material treated therein to enter the gasifier while separating the surrounding atmosphere from all internal spaces at the gasifier.
- This device is essential if one wants to be able to maintain, near the place where the material enters, a slight depression in the gasifier, without this slight depression causes an unacceptable air intake into the gasifier.
- maintaining a slight depression in the gasifier is essential if one wants to eliminate any risk of leakage that would allow carbon monoxide to spread in the gasifier. 'atmosphere.
- This device may advantageously be a set of valves and double valves.
- the "gasification-carbonization-drying" space and all the spaces that are connected to it are separated from the atmosphere by a double valve (31).
- This double valve allows the material to enter all the spaces connected to the "gasification-carbonization-drying" space while preventing the air from enter into this set of spaces where one can, thanks to this seal, maintain, at the point where the material to gasify, a pressure very slightly lower than the atmospheric pressure.
- a grid and a device that ensures the movement of the layer of material over the entire length of the grid. Two different versions of grids, each adapted to the training system associated with it will be described:
- the first drive system uses a piston (7) thin, flowing in the direction of the slope of the grid, on the surface of the grid, below the layer of material that is to move.
- This piston is moved by tubes arranged in the direction of the slope, resulting in a transverse bar fixed to the tube.
- the piston is immersed in the layer of material (3) to gasify. It moves on the top of the grid and below the layer of material to gasify which is placed on the grid. By advancing and retreating at times, it causes, due to the shape of its cross section and due to the slope of the bed, a movement of the layer of material down the bed, making it advance on the bed.
- the "piston drive” tubes are advantageously set in motion by a cable or chain (with return strand) moved by a gear motor (26).
- a properly positioned pulley ensures that the gearmotor drives the piston tubes in both directions (lowering and raising the piston).
- the tubes pass through the wall which limits the closed space filled by the gasification gas, using a metallic device (because of being able to withstand medium temperatures) through which a wall penetration (13) which seals as much as possible (using in case of need of the woven ceramic braid).
- the grid itself consists of angles in strips of folded refractory steel sheets, connected together by welding points so that they constitute T (9).
- the T are arranged in the flow direction of the layer of material to gasify which is placed on the grid consisting of T assembled so that there is between them a longitudinal slot through which the gases flow.
- Below the layer of T that supports the material is another layer of so-called “interstitial"T's (10), which ensures that the falling material of the slits of the first layer of T does not fall completely.
- the layers of T are welded to transverse plates (11) which, advantageously, are attached to the longitudinal edges of the grid, which edges rest on slides (12) attached to the walls of the gasifier.
- a sheet metal (14 and 15) can recover ashes or particles that fall under the bed.
- the second system uses "special inverted angles” made from strips of folded refractory steel sheets, or flat strips of refractory steel sheets welded together.
- the layer of material is placed on a set of "special inverted angles” oriented in the direction of the slope of the grid and which advance and retreat successively in the direction of the grid, retreating one after the other, then advancing all together.
- the "special reverse angles” are based on turned angles that serve as fixed guides.
- the inverted angles are arranged so that there remains, throughout the length, between the "special inverted angles", a slot sufficient for the passage of gases.
- the "special inverted angles” are based on the turned angles fixed on transversal plates, themselves fixed on longitudinal profiles.
- the set of angles angles-transverse plates-longitudinal profiles constitutes a support on which slide the "special inverted angles” on which the layer of material is laid. "Special inverted angles” are moved so that they are driven, one by one or in defined groups, according to a defined program.
- the "gasification-carbonization-drying" space is separated from the “gasification of coal” space (if it exists in the apparatus under consideration), by a material partition (16).
- the clean gases that have passed through the coal layer of the "coal gasification” space are “pyroligneous” are grouped below the bed and exit through a pipe (18). As they have remained separated from the gases leaving the zone of "coal gasification” by a material wall they are "clean of pyroligneux"
- connection ducts between devices and in particular between the "gasification-carbonization-drying" space and the entrance of the "main fan” as well as between the output of the "main fan” and the “elevation chamber” high temperature gas
- the main fan is connected to the" gasification-carbonization-drying "space, below the grid, by a short pipe (22) provided with expansion joints (23).
- the output of the main fan is also connected to the entrance of the "elevated gas elevation” space by a pipe (24) also provided with expansion joints (25).
- These connecting ducts must be sufficiently well insulated. For this purpose they will advantageously consist, from the inside to the outside: of a hardener layer covering the ceramic wool. -A layer of ceramic wool providing thermal insulation. -A sheet constituting the sealing wall. If necessary, a standard 200 ° resistant insulating layer that can be coated on the outside with a protective coating or an aluminum outer shell. The outer banal insulation layer is intended to avoid that the sheet is in operation at a temperature below the dew point of the gas
- This type of gasifier was designed to heat a set of agricultural greenhouses.
- the gases that arrive on the "top” of the layer of material in the "gasification-carbonization-drying" space passes through this layer by gasifying a portion (more or less important depending on the gasifier setting), coal that is present in the charred part of the layer.
- the gas that comes out below the already carbonized layer, the one coming out of the part a little closer to the entrance of the material of the layer being carbonized, the one finally coming out, loaded with the moisture of the drying of the material, from the zone to the entry of the material, is the result of the gasification, carbonization and drying carried out by the gases coming from the space of "elevation of gases at high temperature" which have been sucked by the so-called “main” fan, below the layer of material, in the space of "gasification-combustion-drying” and are pushed back into the set of fins that bring these gases deeply into the "high temperature gas elevation” space of the gasifier.
- the high temperature gas elevation chamber is physically separated from the portion of the gasifier that houses the "gasification-carbonization-drying" space.
- the “main fan” discharges the gases that it has sucked below the "gasification-carbonization-drying" space (gas that will be called “the fuel”), while another fan pushes it back. air (which will be called “the oxidizer”)
- the fuel and the oxidant are mixed by jet effect with the partially burned gases that turn in a circle in the "high temperature gas elevation” chamber and with this mixture reach a temperature sufficient for their self-ignition to take place.
- Part of the partially burned gases and at high temperature (which are the result of a combustion which is only partial and have a PCI of "poor gas” then leaves directly, by a heat-insulated pipe, towards the boiler of the installation greenhouse heating.
- the gases are burned in the combustion chamber which usually houses the flame of a fossil fuel burner.
- the "poor gas” burns, thanks to a device that is called “poor gas burner”.
- the fumes coming out of the boiler are sucked by a fan and, after passing through a cooling tower, leave, saturated with water and cooled, into the atmosphere by a chimney.
- the near-proud has no space for "coal gasification” or "finishing” space. Its “gasification-carbonization-drying” space is materially different and is separated from the “elevation of gases at high temperature” space.
- the elevation of the gases at high temperature takes place in a cylindrical chamber equipped with ignition burners which serve to warm the chamber at the start of the installation.
- the elevation of the gases at high temperature is obtained by partial oxidation of the gases which turn in the chamber, and the rotation of the boxes therein are driven driven by the jets coming out of orifices located in the trailing edge of aerodynamic fins introducing by two joint channels, forming a single fin, the fuel is the competitor in the room that. '
- the "high temperature gas elevation" space is located just above the “gasification-carbonization-drying” and “gasification of coal” spaces and is part of a a single construction incorporating the "high temperature gas lift” chamber, the underside of the bed, the grid and all the parts associated with the grid, the "main fan” and all the necessary plates.
- the main fan is block with all .. It sucks also, according to the method, below the zone of the bed located in the "gasification-carbonization-drying" space, at the bottom of this space.
- the high-temperature gas mass which rotates in the "high temperature gas elevation” space, allows the full length of the "high temperature gas lift" chamber "Gasification of coal", its outermost layer of gas, which immediately arrives on the upper surface of the layer of material that the gas must pass through.
- the gasification air is introduced into the gas that rotates in the "high temperature gas elevation" chamber, by a slot at the trailing edge of an aerodynamically shaped pipe. arranged parallel to the length of the chamber, which duct is fed by a fan, possibly through an exchanger if it is desired to heat the gasification air.
- the gasification air exits at high speed from the slot at the trailing edge of the aerodynamically shaped pipe which brings and distributes the air into the chamber. It is essentially this air which, despite the pressure losses imposed on it by the walls and the fins as well as the air supply line, transmits to the gases that rotate in the chamber, the amount of movement necessary for them to continue to turn.
- the material layer is not supported by material elements, but by the cells that tangentially enter through a longitudinal slot of the quasi-cylindrical inner wall of the reactor and rotate. , along and inside this wall, surrounding, from above, the layer of matter that they cross "from above” to "below". This almost proud is called: almost proud in cyclone fluidized bed.
- the "main fan” draws gas around the axis of the quasi-cylindrical wall that is slotted, ie "below” the layer of material that is in cyclone fluidized suspension in the "gasification" space.
- peripherals are useful for the proper operation of the gasification devices implementing the carbonaceous material gasification process object of this patent. These are, for example: devices for taking up the material in an intermediate storage silo or in a long-term storage silo, dryers adapted to the characteristics of the material to be gasified, and to that of the calories that can be recovered on the entire installation implementing the carbonaceous material gasification process. It may also be material transport equipment: carpet, screw, elevator .... which intervene in the supply of the device material.
- the gasification gases leaving the "coal gasification" space usually contain dust. It is advantageous to separate these dusts from the gases before the passage of gases in the exchanger which heats the gasification air at the same time as it cools the gasification gases and the use of which greatly improves the efficiency of a gasifier. the air.
- This separation of dust, which takes place at high temperature is advantageously in a cyclone followed by multi cyclones. But it can also be done in a cone driven in rapid rotation.
- the improvement of the efficiency that can be obtained for an air gasifier by heating the gasification air (oxidant sent into the chamber of the "high temperature gas elevation" space makes it economically , in an air gasification process, the use of a countercurrent heat exchanger or an assembly of cross-flow heat exchangers, the heat exchanger used must withstand the high temperatures in order to heat up the heat. air to 600 ° from the heat recovered from the gasification gas, so it must be practically made of stainless metal alloy at high temperatures and must be very efficient and reasonably priced.
- This washing may also make it possible to recover a part of the latent heat of condensation of the water vapor contained in the gases.
- Appliances such as air-cooled refrigerants can advantageously fulfill its functions of washer and heat recovery of low thermal level. But one can also use for gasification gas washing, other types of devices as effective more effective and less expensive, under development. Poor gas burner
- the gas intended for combustion in the boiler will advantageously be introduced by turning in the combustion chamber of the boiler where it will be burned by combustion air which will be introduced by a tube advantageously of decreasing square section, provided with fins of such that it is possible to introduce the tube provided with its fins by the hole usually for the burner of the boiler, and this, as it would introduce a conventional burner in the hole which is intended for it.
- the injection of air through this tube and fins will provide the flame with the necessary air for combustion and will turn the gases in the boiler combustion chamber vigorously enough for the combustion to be stable.
- the quantity of air to be injected in the boiler burner will be defined so that the excess of air in the fumes leaving the boiler ensures sufficiently high CO contents. low in fumes.
- FIG. 1 represents an overall perspective view of a gasifier according to the method, produced in a bed-laying version with a high-temperature elevation space separated from the "gasification-carbonization-drying" and “gasification” spaces; coal ".
- Figure 2 shows a top view of the same set.
- Figure 3 shows a side view of this assembly.
- FIG. 4 represents a section of the "gasification-carbonization-drying" spaces and the “gasification of coal” space.
- Figure 5 shows a section of the grid in a particular embodiment.
- Figure 6 shows a side view of the "elevation of high temperature gas" space in a particular embodiment.
- Figure 7 shows a top view of the "high temperature elevation" space
- FIG. 8 shows a section of a particular version of gasifier in which the "elevation of gases at high temperature” space is not separated from the “gasification-carbonization-drying” spaces and the space of " gasification of coal ".
- Figures 9 and 10 show two perspective views of the same gasification system as Figure 8.
- Fig. 11 is a perspective view of the interior of the "elevated gas elevation" space in the gasifier version shown in Figs. 8, 9 and 10.
- Fig. 12 is a sectional view of the "high temperature gas elevation" space shown in perspective in Fig. 11.
- FIG. 13 is a sectional view of the "gasification-carbonization-drying" space of a cyclone fluidized cyclone version of a gasifier.
- FIG. 14 represents a perspective view of the same gasification device as FIG.
- FIG. 15 represents a perspective view of a total combustion installation in which a fixed bed gasification system on a fixed gate supplies a boiler.
- FIG. 16 represents a sectional view of a grid corresponding to the second device for driving the layer of material to gasify on the bed which supports it in the "carbonization-drying gasification” space and possibly in the space of 'Gasification coal which can prolong it.
- the first industrial applications of the invention are gasification, both products of very different grain sizes and humidities, systems integrating gasification and carbonization, simple combustion systems and / or incineration of many materials, systems electricity and heat cogeneration, electricity generation systems from biomass, heating systems with high environmental and energy performance from biomass (in particular wood chips or shredded wood, wet).
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Gasification And Melting Of Waste (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Drying Of Solid Materials (AREA)
- Processing Of Solid Wastes (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1600145A FR3047300B1 (fr) | 2016-01-28 | 2016-01-28 | Procede de gazeification et dispositifs permettant de le mettre en oeuvre |
| PCT/FR2017/000024 WO2017129871A1 (fr) | 2016-01-28 | 2017-01-30 | Procédé de gazéification de matières carbonées et dispositifs permettant de le mettre en oeuvre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3408357A1 true EP3408357A1 (de) | 2018-12-05 |
Family
ID=58267137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17710588.9A Withdrawn EP3408357A1 (de) | 2016-01-28 | 2017-01-30 | Verfahren zur vergasung von kohlenstoffhaltigen materialien und vorrichtungen zur umsetzung des verfahrens |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3408357A1 (de) |
| FR (1) | FR3047300B1 (de) |
| MA (1) | MA45438A (de) |
| WO (1) | WO2017129871A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3560369A (en) * | 1968-06-05 | 1971-02-02 | Allis Chalmers Mfg Co | Retorting oil shale including agglomerated fines |
| US4200517A (en) * | 1977-12-05 | 1980-04-29 | Arthur G. Mckee & Company | Treatment of hydrocarbon-containing mineral material |
| US4461674A (en) * | 1981-12-31 | 1984-07-24 | Allis-Chalmers Corporation | Apparatus for recovery of different weight fractions of oil from shale |
| EP3287697A1 (de) * | 2012-12-21 | 2018-02-28 | Covanta Energy, LLC | Vergasungsverbrennungssystem |
| US9874142B2 (en) * | 2013-03-07 | 2018-01-23 | General Electric Company | Integrated pyrolysis and entrained flow gasification systems and methods for low rank fuels |
-
2016
- 2016-01-28 FR FR1600145A patent/FR3047300B1/fr active Active
-
2017
- 2017-01-30 WO PCT/FR2017/000024 patent/WO2017129871A1/fr not_active Ceased
- 2017-01-30 EP EP17710588.9A patent/EP3408357A1/de not_active Withdrawn
- 2017-01-30 MA MA045438A patent/MA45438A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017129871A4 (fr) | 2017-09-21 |
| FR3047300B1 (fr) | 2022-04-29 |
| WO2017129871A1 (fr) | 2017-08-03 |
| FR3047300A1 (fr) | 2017-08-04 |
| MA45438A (fr) | 2019-05-01 |
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