CN112683069A - Cement kiln flue gas sulfur dioxide emission reduction device and use method thereof - Google Patents
Cement kiln flue gas sulfur dioxide emission reduction device and use method thereof Download PDFInfo
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- CN112683069A CN112683069A CN202011545675.6A CN202011545675A CN112683069A CN 112683069 A CN112683069 A CN 112683069A CN 202011545675 A CN202011545675 A CN 202011545675A CN 112683069 A CN112683069 A CN 112683069A
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 72
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000003546 flue gas Substances 0.000 title claims abstract description 52
- 239000004568 cement Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 65
- 230000023556 desulfurization Effects 0.000 claims abstract description 65
- 238000009434 installation Methods 0.000 claims abstract description 59
- 239000000428 dust Substances 0.000 claims abstract description 23
- 239000012535 impurity Substances 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 239000003795 chemical substances by application Substances 0.000 claims description 43
- 239000002994 raw material Substances 0.000 claims description 41
- 239000000843 powder Substances 0.000 claims description 34
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 238000000354 decomposition reaction Methods 0.000 claims description 6
- 238000000265 homogenisation Methods 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- 239000007800 oxidant agent Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 230000036632 reaction speed Effects 0.000 claims description 4
- 230000003009 desulfurizing effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 3
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 229910052960 marcasite Inorganic materials 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Treating Waste Gases (AREA)
Abstract
The invention discloses a cement kiln flue gas sulfur dioxide emission reduction device and a using method thereof, and the device comprises a flue connected to a cement kiln, wherein one end of the flue, which is far away from the cement kiln, is connected with a bag-type dust remover, a large-particle impurity filtering device is connected between the flue and the bag-type dust remover, the large-particle impurity filtering device comprises an installation tank, a connecting pipe is connected between the bag-type dust remover and the installation tank, an installation frame is fixedly installed on the inner side wall at the top end of the installation tank, a precise filter screen is fixedly installed on the inner side wall of the installation frame, a cleaning device matched with the precise filter screen is arranged at the. The invention can realize the standard emission of SO2, can meet the stricter standard of the emission of atmospheric pollutants in the cement industry, has the advantages of low construction cost, low operation cost, small installed power, high desulfurization effect, simple and easy operation and stable and reliable system, is an effective scheme for controlling the emission concentration of SO2 and reducing the emission amount, and has obvious environmental protection benefit.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization, in particular to a cement kiln flue gas sulfur dioxide emission reduction device and a using method thereof.
Background
Emissions of SO2 from cement enterprises originate from two places: raw materials and fuels are mainly generated by the oxidation of inorganic sulfur and organic sulfur in the raw materials and the fuels, pyrite and marcasite (FeS2) or some sulfides (FeS) in the raw materials are oxidized into SO2 gas in the 1 st and 2 nd-stage cyclone preheaters, one part of the SO2 gas is absorbed by alkaline materials, and the other part of the SO2 gas enters a chimney at the tail of a kiln after passing through a humidifying tower or a vertical mill for raw materials and is discharged; most of the SO2 in the fuel can react with high-temperature alkaline hot raw materials (rich in CaO) and O2 to generate sulfate, SO2 in the kiln tail flue gas is mainly generated by the decomposition of the raw materials.
In order to satisfy cement industry atmospheric pollutants emission standard, need carry out desulfurization treatment to the cement kiln flue gas, if unable discharge to reach standard, will seriously influence the company and normally produce, especially when company's raw material system avoids the peak, SO2 concentration is serious to exceed standard, can reach more than 500mg/m3 when being the highest, can't realize discharge to reach standard, the system is continuous stability relatively poor, consequently need to design a cement kiln flue gas sulfur dioxide emission reduction device urgently.
Disclosure of Invention
The invention aims to solve the problem that in the prior art, the flue gas of a cement kiln can reach the emission standard after being desulfurized, and provides a device for reducing the emission of the flue gas sulfur dioxide of the cement kiln and a using method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cement kiln flue gas sulfur dioxide emission reduction device comprises a flue connected to a cement kiln, wherein one end of the flue, which is far away from the cement kiln, is connected with a bag-type dust remover, a large-particle impurity filtering device is connected between the flue and the bag-type dust remover, the large-particle impurity filtering device comprises an installation tank, a connecting pipe is connected between the bag-type dust remover and the installation tank, an installation frame is fixedly installed on the inner side wall at the top end of the installation tank, a precise filter screen is fixedly installed on the inner side wall of the installation frame, a cleaning device matched with the precise filter screen is arranged at the top end of the installation tank, a preheater is arranged at one end of the bag-type dust remover, an annular mounting plate is fixedly installed on the outer side wall of the preheater, the preheater is positioned at the inner side of the annular mounting plate, the one end that the intake pipe was kept away from to the sack cleaner is equipped with the inlet pipe, be connected with loading attachment on the inlet pipe, install the outlet duct on the lateral wall that the annular mounting panel is close to inlet pipe one end, be connected with water agent desulphurization unit on the outlet duct.
Preferably, cleaning device includes the cylinder of fixed mounting on the installation tank roof, the output fixed mounting of cylinder has the piston rod, and the bottom of piston rod runs through the roof of installation tank and extends to in the installation tank, the bottom fixed mounting of piston rod has the mounting panel, evenly install a plurality of steel needles on the diapire of mounting panel, evenly be equipped with a plurality of filter screen holes on the precision filter screen, and steel needle and filter screen hole one-to-one, fixed mounting has the installation pole on the diapire of mounting panel, and the bottom of installation pole runs through the precision filter screen and extends to the downside of precision filter screen and installing frame, the bottom of installation tank is equipped with the drain, the bottom fixed mounting of installation pole has the toper of mutually supporting with the drain.
Preferably, the outer side of the installation tank is fixedly wrapped with an insulating layer.
Preferably, loading attachment includes desulfurization powder storage bin, be connected with measurement conveying system on the desulfurization powder storage bin, measurement conveying system's one end is equipped with homogenization storehouse raw material conveying chute, and measures conveying system and connect on homogenization storehouse raw material conveying chute, be connected with the kiln lifting machine on the homogenization storehouse raw material conveying chute, and go into the kiln lifting machine and connect on the inlet pipe.
Preferably, water agent desulphurization unit includes water agent desulfurization case, water agent desulfurization case slope sets up, and the outlet duct is connected in the lower one end of water agent desulfurization case, the blast pipe is installed to the higher bottom of water agent desulfurization case, be connected with condensing equipment and exhaust apparatus on the blast pipe, fixed mounting has the installation pipe on the roof of water agent desulfurization case, evenly be connected with a plurality of atomizer on the installation pipe, and atomizer evenly sets up in the water agent desulfurization case, the bottom of water agent desulfurization case is equipped with the water tank, be equipped with the suction pump in the water tank, be connected with the drinking-water pipe on the suction pump, and the top of drinking-water pipe is connected on the installation pipe, be connected with the wet return on the diapire of the lower one end of water agent desulfurization case, and the bottom of wet return is connected on the.
A use method of a cement kiln flue gas sulfur dioxide emission reduction device comprises the following steps:
filtering large particle impurities in flue gas: introducing flue gas into the installation tank through the flue, wherein the flue gas filtered by the precision filter screen flows into the bag-type dust collector through the connecting pipe, and large granular impurities after filtering are left at the bottom end of the precision filter screen and fall to the bottom end of the installation tank;
secondly, flue gas dust removal: the flue gas enters a bag-type dust collector to remove dust;
thirdly, flue gas heat exchange: the raw materials in the preheater can be preheated by introducing the flue gas into the annular mounting plate through the gas inlet pipe, and the flue gas after heat exchange is discharged through the gas outlet pipe;
powder sulfur fixation: the original kiln ash bin is used as a desulfurization powder storage bin, the raw material enters a homogenizing bin bottom raw material conveying chute through a metering conveying system, the raw material powder is mixed with raw material powder and then enters a preheater through a kiln entering lifter, and the optimized combined powder of the calcium-based sulfur-fixing agent, the oxidant and the catalyst is added before the raw material powder enters a kiln, so that the desulfurization reaction rate is remarkably accelerated, the decomposition rate of sulfur-fixing products is reduced, and the desulfurization and sulfur-fixing efficiency is greatly improved;
desulfurizing with a water agent: spray guns are evenly distributed at the position of an air rising pipe of the preheater, a desulfurization water agent is sprayed in an atomizing mode, solid-gas desulfurization reaction is converted into solid-liquid desulfurization reaction, contact area and reaction time are increased, reaction speed is increased, escaped SO is captured efficiently in a secondary mode, and reaction efficiency is improved.
Compared with the prior art, the invention has the following beneficial effects:
1. the emission of SO2 reaching the standard can be realized, the stricter standard of the emission of the atmospheric pollutants in the cement industry can be met, the technology has the advantages of low construction cost, low operation cost, small installed power, high desulfurization effect, simplicity, convenience, practicability and stable and reliable system, is an effective scheme for controlling the emission concentration of SO2 and reducing the emission amount, and has obvious environmental protection benefit;
2. the original kiln ash bin is used as a desulfurization powder storage bin, the raw material enters a homogenizing bin bottom raw material conveying chute through a metering conveying system, the raw material powder is mixed with raw material powder and then enters a preheater through a kiln entering lifter, and the optimized combined powder of the calcium-based sulfur-fixing agent, the oxidant and the catalyst is added before the raw material powder enters a kiln, so that the desulfurization reaction rate is remarkably accelerated, the decomposition rate of sulfur-fixing products is reduced, and the desulfurization and sulfur-fixing efficiency is greatly improved;
3. spray guns are uniformly distributed at the position of an air rising pipe of the preheater, a desulfurization water agent is sprayed in an atomizing mode, solid-gas desulfurization reaction is converted into solid-liquid desulfurization reaction, contact area and reaction time are increased, reaction speed is increased, escaped SO2 is captured secondarily efficiently, and reaction efficiency is improved.
Drawings
FIG. 1 is a front structural sectional view of a cement kiln flue gas sulfur dioxide emission reduction device and a use method thereof according to the present invention;
FIG. 2 is a schematic front structural view of a cement kiln flue gas sulfur dioxide emission reduction device and a use method thereof provided by the invention.
In the figure: the device comprises a flue 1, a bag-type dust collector 2, an installation tank 3, a connecting pipe 4, an installation frame 5, an air cylinder 6, a piston rod 7, an installation plate 8, a steel needle 9, an installation rod 10, a conical sealing plug 11, a heat preservation layer 12, a preheater 13, an annular installation plate 14, an air inlet pipe 15, an air inlet pipe 16, an air outlet pipe 17, an aqueous agent desulfurization box 18, an air outlet pipe 19, an installation pipe 20, an atomizing nozzle 21, a water tank 22, a water pumping pipe 23 and a water return pipe 24.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-2, a cement kiln flue gas sulfur dioxide emission reduction device, including connecting flue 1 on the cement kiln, the one end that the cement kiln was kept away from to flue 1 is connected with sack cleaner 2, be connected with large granule impurity filter equipment between flue 1 and sack cleaner 2, large granule impurity filter equipment is including installing jar 3, be connected with connecting pipe 4 between sack cleaner 2 and the installing jar 3, fixed mounting has installing frame 5 on the inside wall on installing jar 3 top, fixed mounting has the precision filter screen on the inside wall of installing frame 5, let in the flue gas in installing jar 3 through flue 1, the flue gas can flow to sack cleaner 2 in through connecting pipe 4 after the precision filter screen filters, the large granule impurity after the filtration can be stayed the bottom of precision filter screen and fall to the bottom of installing jar 3.
The top end of the installation tank 3 is provided with a cleaning device which is matched with the precision filter screen, the cleaning device comprises a cylinder 6 which is fixedly installed on the top wall of the installation tank 3, the output end of the cylinder 6 is fixedly provided with a piston rod 7, the bottom end of the piston rod 7 penetrates through the top wall of the installation tank 3 and extends into the installation tank 3, the bottom end of the piston rod 7 is fixedly provided with an installation plate 8, the bottom wall of the installation plate 8 is uniformly provided with a plurality of steel needles 9, the precision filter screen is uniformly provided with a plurality of filter screen holes, the steel needles 9 correspond to the filter screen holes one by one, the bottom wall of the installation plate 8 is fixedly provided with an installation rod 10, the bottom end of the installation rod 10 penetrates through the precision filter screen and extends to the lower side of the precision filter screen and the installation frame 5, the bottom end of the installation tank 3 is provided with a drain outlet, the bottom end of the installation rod 10 is fixedly provided with a conical sealing, the installation board 8 drives just can release the impurity of jam in the precision filter screen hole when the steel needle 9 moves down to can avoid the precision filter screen to be blockked up, conical seal plug 11 is located the downside of installation jar 3 this moment, therefore the impurity of the bottom of installation jar 3 and the impurity under the clearance can be discharged through the drain.
The fixed parcel in installing tank 3's the outside has heat preservation 12, can prevent that the heat of flue gas from running off fast.
One end of a bag-type dust collector 2 is provided with a preheater 13, an annular mounting plate 14 is fixedly mounted on the outer side wall of the preheater 13, the preheater 13 is positioned at the inner side of the annular mounting plate 14, an air inlet pipe 15 is connected between the bag-type dust collector 2 and the annular mounting plate 14, the air inlet pipe 15 is connected on the outer side wall of one end of the annular mounting plate 14, one end of the bag-type dust collector 2, which is far away from the air inlet pipe 15, is provided with a feed pipe 16, the feed pipe 16 is connected with a feeding device, the feeding device comprises a desulfurization powder storage bin, the desulfurization powder storage bin is connected with a metering and conveying system, one end of the metering and conveying system is provided with a homogenizing silo raw material conveying chute, the metering and conveying system is connected on the homogenizing silo raw material conveying chute, the homogenizing silo raw material conveying chute is connected with a kiln inlet elevator, the, the raw material powder is mixed and then enters a preheater through a kiln elevator, and the optimized combined powder of the calcium-based sulfur-fixing agent, the oxidant and the catalyst is added before the raw material powder enters the kiln, so that the desulfurization reaction rate is remarkably accelerated, the decomposition rate of sulfur-fixing products is reduced, and the desulfurization and sulfur-fixing efficiency is greatly improved.
The outer side wall of the annular mounting plate 14 close to one end of the feeding pipe 16 is provided with an air outlet pipe 17, flue gas is introduced into the annular mounting plate 14 through an air inlet pipe 15 to preheat raw materials in the preheater 13, and the flue gas after heat exchange is discharged through the air outlet pipe 17.
An aqueous agent desulfurization device is connected to the air outlet pipe 17, the aqueous agent desulfurization device comprises an aqueous agent desulfurization box 18, the aqueous agent desulfurization box 18 is obliquely arranged, the air outlet pipe 17 is connected to the lower end of the aqueous agent desulfurization box 18, an air outlet pipe 19 is installed at the higher bottom end of the aqueous agent desulfurization box 18, a condensing device and an air exhaust device are connected to the air outlet pipe 19, an installation pipe 20 is fixedly installed on the top wall of the aqueous agent desulfurization box 18, a plurality of atomizing spray heads 21 are evenly connected to the installation pipe 20, the atomizing spray heads 21 are evenly arranged in the aqueous agent desulfurization box 18, a water tank 22 is arranged at the bottom end of the aqueous agent desulfurization box 18, a water suction pump is arranged in the water tank 22, a water suction pipe 23 is connected to the water suction pump, the top end of the water suction pipe 23 is connected to the installation pipe 20, a water return pipe 24 is connected to the bottom wall of, and a desulfurization water agent is sprayed in an atomized manner, SO that the solid-gas desulfurization reaction is converted into the solid-liquid desulfurization reaction, the contact area and the reaction time are increased, the reaction speed is increased, the escaped SO2 is captured secondarily and efficiently, and the reaction efficiency is improved.
A use method of a cement kiln flue gas sulfur dioxide emission reduction device comprises the following steps:
filtering large particle impurities in flue gas: introducing flue gas into the installation tank through the flue, wherein the flue gas filtered by the precision filter screen flows into the bag-type dust collector through the connecting pipe, and large granular impurities after filtering are left at the bottom end of the precision filter screen and fall to the bottom end of the installation tank;
secondly, flue gas dust removal: the flue gas enters a bag-type dust collector to remove dust;
thirdly, flue gas heat exchange: the raw materials in the preheater can be preheated by introducing the flue gas into the annular mounting plate through the gas inlet pipe, and the flue gas after heat exchange is discharged through the gas outlet pipe;
powder sulfur fixation: the method comprises the steps of utilizing an original kiln ash bin as a desulfurization powder storage bin, entering a homogenizing bin bottom raw material conveying chute through a metering conveying system, mixing the raw material powder with raw material powder, entering a preheater through a kiln elevator, adding calcium-based sulfur fixing agent, oxidant and catalyst optimized combination powder before the raw material powder enters a kiln, obviously accelerating desulfurization reaction rate, reducing decomposition rate of sulfur fixing products, greatly improving desulfurization and sulfur fixing efficiency, fully utilizing the original kiln ash bin of a production line, adding a desulfurization powder adding metering device on the homogenizing bin outlet chute, adopting a PLC control system, realizing local operation on site by a touch screen, realizing remote control of the system by the PLC, completely operating and monitoring the system in a central control room, adjusting the amount of a desulfurizer according to feedback of flue gas SO2 discharge, automatically, accurately and stably adding a powder metering and feeding system, meeting any working condition of a cement kiln, and not needing to be attended by a special person, the labor intensity and personnel are not increased;
desulfurizing with a water agent: the utility model discloses a desulfurization agent, including pre-heater uptake pipe, spray gun, many spray guns of pre-heater uptake pipe department equipartition, increase area of contact and reaction time simultaneously, accelerate reaction rate, the secondary is high-efficient catches the SO2 of escape, improve reaction efficiency, the many spray guns of pre-heater uptake pipe department equipartition, the desulfurization agent is sprayed in the atomizing, increase area of contact and reaction time, accelerate reaction rate, the secondary is high-efficient catches the SO2 of escape, improve reaction efficiency, realize the effective control to SO2 emission concentration, satisfy emission concentration standard requirement.
Further, unless otherwise specifically stated or limited, the above-described fixed connection is to be understood in a broad sense, and may be, for example, welded, glued, or integrally formed as is conventional in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides a cement kiln flue gas sulfur dioxide emission reduction device, is including connecting flue (1) on the cement kiln which characterized in that: the one end that cement kiln was kept away from in flue (1) is connected with sack cleaner (2), be connected with large granule impurity filter equipment between flue (1) and sack cleaner (2), large granule impurity filter equipment is including installing jar (3), be connected with connecting pipe (4) between sack cleaner (2) and installing jar (3), fixed mounting has installing frame (5) on the inside wall on installing jar (3) top, fixed mounting has the precision filter screen on the inside wall of installing frame (5), the top of installing jar (3) is equipped with the cleaning device who mutually supports with the precision filter screen, the one end of sack cleaner (2) is equipped with pre-heater (13), fixed mounting has annular mounting panel (14) on the lateral wall of pre-heater (13), and pre-heater (13) are located the inboard of annular mounting panel (14), be connected with intake pipe (15) between sack cleaner (2) and annular mounting panel (14), and intake pipe (15) are connected on the lateral wall of annular mounting panel (14) one end, the one end that intake pipe (15) were kept away from in sack cleaner (2) is equipped with inlet pipe (16), be connected with loading attachment on inlet pipe (16), install outlet duct (17) on annular mounting panel (14) are close to the lateral wall of inlet pipe (16) one end, be connected with water agent desulphurization unit on outlet duct (17).
2. The cement kiln flue gas sulfur dioxide emission reduction device according to claim 1, characterized in that: the cleaning device comprises an air cylinder (6) fixedly arranged on the top wall of the mounting tank (3), the output end of the air cylinder (6) is fixedly provided with a piston rod (7), the bottom end of the piston rod (7) penetrates through the top wall of the installation tank (3) and extends into the installation tank (3), the bottom end of the piston rod (7) is fixedly provided with an installation plate (8), the bottom wall of the installation plate (8) is evenly provided with a plurality of steel needles (9), the precise filter screen is evenly provided with a plurality of filter screen holes, the steel needles (9) correspond to the filter meshes one by one, the bottom wall of the mounting plate (8) is fixedly provided with mounting rods (10), the bottom end of the mounting rod (10) penetrates through the precision filter screen and extends to the lower sides of the precision filter screen and the mounting frame (5), the bottom of installing tank (3) is equipped with the drain, the bottom fixed mounting of installing rod (10) has the toper sealing plug (11) of mutually supporting with the drain.
3. The cement kiln flue gas sulfur dioxide emission reduction device according to claim 1, characterized in that: and the outer side of the mounting tank (3) is fixedly wrapped with a heat-insulating layer (12).
4. The cement kiln flue gas sulfur dioxide emission reduction device and the use method thereof according to claim 1 are characterized in that: loading attachment includes the desulfurization powder storage bin, be connected with measurement conveying system on the desulfurization powder storage bin, measurement conveying system's one end is equipped with homogenization storehouse raw material conveying chute, and measures conveying system and connect on homogenization storehouse raw material conveying chute, be connected with the kiln lifting machine on the homogenization storehouse raw material conveying chute, and go into the kiln lifting machine and connect on the inlet pipe.
5. The cement kiln flue gas sulfur dioxide emission reduction device according to claim 1, characterized in that: the water agent desulfurization device comprises a water agent desulfurization box (18), the water agent desulfurization box (18) is obliquely arranged, an air outlet pipe (17) is connected at one end of the water agent desulfurization box (18) which is lower, an air outlet pipe (19) is installed at the lower bottom end of the water agent desulfurization box (18), a condensing device and an air exhaust device are connected on the air outlet pipe (19), an installation pipe (20) is fixedly installed on the top wall of the water agent desulfurization box (18), a plurality of atomizing spray heads (21) are evenly connected on the installation pipe (20), the atomizing spray heads (21) are evenly arranged in the water agent desulfurization box (18), a water tank (22) is arranged at the bottom end of the water agent desulfurization box (18), a water suction pump is arranged in the water tank (22), a water suction pipe (23) is connected on the water suction pump, the top end of the water suction pipe (23) is connected on the installation pipe (20), a water return pipe (24) is connected on the bottom, and the bottom end of the water return pipe (24) is connected to the water tank (22).
6. The use method of the cement kiln flue gas sulfur dioxide emission reduction device according to claim 1, characterized by comprising the following steps:
filtering large particle impurities in flue gas: introducing flue gas into the installation tank through the flue, wherein the flue gas filtered by the precision filter screen flows into the bag-type dust collector through the connecting pipe, and large granular impurities after filtering are left at the bottom end of the precision filter screen and fall to the bottom end of the installation tank;
secondly, flue gas dust removal: the flue gas enters a bag-type dust collector to remove dust;
thirdly, flue gas heat exchange: the raw materials in the preheater can be preheated by introducing the flue gas into the annular mounting plate through the gas inlet pipe, and the flue gas after heat exchange is discharged through the gas outlet pipe;
powder sulfur fixation: the original kiln ash bin is used as a desulfurization powder storage bin, the raw material enters a homogenizing bin bottom raw material conveying chute through a metering conveying system, the raw material powder is mixed with raw material powder and then enters a preheater through a kiln entering lifter, and the optimized combined powder of the calcium-based sulfur-fixing agent, the oxidant and the catalyst is added before the raw material powder enters a kiln, so that the desulfurization reaction rate is remarkably accelerated, the decomposition rate of sulfur-fixing products is reduced, and the desulfurization and sulfur-fixing efficiency is greatly improved;
desulfurizing with a water agent: spray guns are uniformly distributed at the position of an air rising pipe of the preheater, a desulfurization water agent is sprayed in an atomizing mode, solid-gas desulfurization reaction is converted into solid-liquid desulfurization reaction, contact area and reaction time are increased, reaction speed is increased, escaped SO2 is captured secondarily efficiently, and reaction efficiency is improved.
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| CN113339829A (en) * | 2021-05-12 | 2021-09-03 | 安谊谊 | Smoke and dust purifier for industrial energy-saving boiler convenient to heat recovery |
| CN114321699A (en) * | 2021-12-31 | 2022-04-12 | 张季 | Low-temperature ultra-large liquefied natural gas storage tank |
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