CN111214933B - Sintering flue gas desulfurization system and method - Google Patents
Sintering flue gas desulfurization system and method Download PDFInfo
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- CN111214933B CN111214933B CN201911084535.0A CN201911084535A CN111214933B CN 111214933 B CN111214933 B CN 111214933B CN 201911084535 A CN201911084535 A CN 201911084535A CN 111214933 B CN111214933 B CN 111214933B
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 239000003546 flue gas Substances 0.000 title claims abstract description 126
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 78
- 230000023556 desulfurization Effects 0.000 title claims abstract description 78
- 238000005245 sintering Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000428 dust Substances 0.000 claims abstract description 67
- 239000002002 slurry Substances 0.000 claims abstract description 46
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 239000007921 spray Substances 0.000 claims abstract description 36
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 33
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 33
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 33
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 33
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000779 smoke Substances 0.000 claims abstract description 23
- 238000001802 infusion Methods 0.000 claims abstract description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 60
- 239000000292 calcium oxide Substances 0.000 claims description 30
- 235000012255 calcium oxide Nutrition 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000003570 air Substances 0.000 description 15
- 238000005299 abrasion Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a sintering flue gas desulfurization system and a sintering flue gas desulfurization method, wherein the system comprises a slaked lime slurry supply device, an air supply device, a water storage tank, a three-fluid spray gun, a desulfurization tower, a dust removal device and a flue gas inlet pipeline; the slaked lime slurry supply device is communicated with the three-fluid spray gun, the air supply device is communicated with the three-fluid spray gun, and the water storage tank is communicated with the three-fluid spray gun through an infusion pump; the bottom of the desulfurizing tower is provided with a flue gas inlet and a flue gas outlet, a venturi is communicated below the flue gas inlet of the desulfurizing tower, the venturi is communicated with a flue gas inlet pipeline, and a nozzle of the three-fluid spray gun is arranged on the flue gas inlet pipeline below the venturi. The sintering flue gas desulfurization method of the invention is applied to the sintering flue gas desulfurization system, combines the advantages of wet desulfurization and semi-dry desulfurization, has flexible and reliable operation, wide application range of flue gas load, no corrosion and no white smoke generation, and has the desulfurization efficiency as high as 95-99%.
Description
Technical Field
The invention belongs to the field of flue gas treatment equipment and methods, and particularly relates to a sintering flue gas desulfurization system and method.
Background
The sintering flue gas desulfurization technology is mainly applied to limestone (lime) -gypsum method and wet desulfurization, the wet desulfurization efficiency is high and can reach 99 percent, but the problems of waste water discharge, high operation energy consumption and 'white smoke' at the outlet of a chimney exist. Moreover, the sintering flue gas volume is large, the sulfur content is low, the moisture content is high, the chloride ion is high, the corrosion problem of wet desulfurization system equipment is serious, and the stable operation of the whole desulfurization system is seriously threatened.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a sintering flue gas desulfurization system and a sintering flue gas desulfurization method.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a sintering flue gas desulfurization system, which comprises a slaked lime slurry supply device, an air supply device, a water storage tank, a three-fluid spray gun, a desulfurization tower, a dust removal device and a flue gas inlet pipeline;
the slaked lime slurry supply device is communicated with the three-fluid spray gun through a fluid pump, the air supply device is communicated with the three-fluid spray gun through a pipeline, and the water storage tank is communicated with the three-fluid spray gun through an infusion pump;
the flue gas desulfurization device is characterized in that a flue gas inlet is formed in the bottom of the desulfurization tower, a flue gas outlet is formed in the desulfurization tower, a venturi is communicated with the lower portion of the flue gas inlet of the desulfurization tower, the venturi is communicated with a flue gas inlet pipeline, a nozzle of a three-fluid spray gun is arranged on the flue gas inlet pipeline below the venturi, the flue gas outlet of the desulfurization tower is communicated with an inlet pipeline of the dust removal device, a gas outlet of the dust removal device is communicated with an exhaust pipeline through a draught fan, and a gas return pipe is communicated between the outlet of the draught fan and the flue gas inlet pipeline.
The sintering flue gas desulfurization system combines the advantages of wet desulfurization and semi-dry desulfurization, has flexible and reliable operation and wide application range of flue gas load, is 40-110% of the design load of the system, and has no corrosion and no white smoke generation; according to the sintering flue gas desulfurization system, the outlet of the nozzle of the three-fluid spray gun is arranged on the flue gas inlet pipeline below the venturi tube, and the slurry sprayed by the nozzle of the three-fluid spray gun can be fully mixed with the flue gas after passing through the venturi tube, so that the flue gas can better react with slaked lime slurry and compressed air sprayed by the nozzle of the three-fluid spray gun, the desulfurization efficiency is improved, and the desulfurization efficiency can reach 95-99%; the sintering flue gas desulfurization system can introduce part of purified flue gas into raw flue gas through the gas return pipe, and can automatically adjust the proportion of the purified exhaust flue gas and the recycled raw flue gas, so that the risk of bed collapse caused by large fluctuation of flue gas load is prevented.
Preferably, the dust removing device comprises a bag-type dust remover and an ash bin, the bag-type dust remover is provided with an ash collecting hopper, a discharge hole of the ash collecting hopper is communicated with the ash bin through a pipeline, a discharge hole of the ash collecting hopper is communicated with the smoke inlet pipeline through a dust conveying pipeline, and an outlet of the dust conveying pipeline is positioned on the side wall of the smoke inlet pipeline.
The bag-type dust collector arranged in the sintering flue gas desulfurization system is provided with the ash collecting hopper, the discharge port of the ash collecting hopper is communicated with the smoke inlet pipeline through the dust conveying pipeline, so that the desulfurization ash collected by the bag-type dust collector enters the smoke inlet pipeline to realize the recycling of the desulfurizing agent, raw materials are saved, and the cost is reduced.
Preferably, the slaked lime slurry supply device comprises a quicklime bin, a quicklime slaker, a desander and a slurry tank, wherein a discharge port of the quicklime bin is communicated with a feed port of the quicklime slaker, a discharge port of the quicklime slaker is communicated with a feed port of the desander, a discharge port of the desander is communicated with a feed port of the slurry tank, the slurry tank is provided with a process water inlet, and a discharge port of the slurry tank is communicated with a three-fluid spray gun through a fluid pump.
The sintering flue gas desulfurization system can improve the quality of calcium hydroxide slurry, effectively improve desulfurization efficiency and reduce abrasion of system equipment.
Preferably, the exhaust pipeline is communicated with a chimney.
Preferably, the air supply device is an air compression pump.
Preferably, the flue gas outlet of the desulfurizing tower is positioned at the top of the desulfurizing tower.
Preferably, the diameter of the venturi tube outlet is equal to the diameter of the flue gas inlet of the desulfurizing tower.
When the diameter of the venturi tube outlet is equal to the diameter of the flue gas inlet of the desulfurizing tower, better mixing of slurry and flue gas in the desulfurizing tower can be realized, and the desulfurizing efficiency is improved.
The invention also provides a sintering flue gas desulfurization method, which is applied to the system described in any one of the above, and comprises the following steps:
(1) The quicklime enters a quicklime slaker through a quicklime bin to generate slaked lime;
(2) Filtering and degritting the slaked lime by a degritting machine, feeding the slaked lime into a slurry tank, and adding process water into a process water inlet of the slurry tank to mix with the slaked lime to form slaked lime slurry;
(3) The flue gas to be treated enters the desulfurizing tower from the flue gas inlet pipe through the gas inlet pipe on the flue gas inlet;
(4) The slaked lime slurry, the process water and the compressed air are sprayed into the smoke inlet pipeline through the three-fluid spray gun to be mixed with the smoke, and enter the desulfurization tower through the venturi tube to carry out desulfurization reaction;
(5) The flue gas after desulfurization enters a bag-type dust remover through a flue gas outlet of a desulfurization tower to remove dust, and then enters a chimney through a first induced draft fan to be discharged into the atmosphere.
Preferably, in the step (5), the flue gas enters the bag-type dust collector through a flue gas outlet of the desulfurizing tower to remove dust, and then enters the flue gas inlet pipeline through a gas return pipe.
Preferably, in the step (5), a part of the desulfurized ash obtained after the dust removal by the bag-type dust remover is input into the quicklime bin, and the other part of the desulfurized ash enters the smoke inlet pipeline through the dust conveying pipeline.
The invention has the beneficial effects that: the invention provides a sintering flue gas desulfurization system and a method, and the sintering flue gas desulfurization system has the following advantages: the sintering flue gas desulfurization system is provided with the three-fluid spray gun, the three-fluid spray gun sprays slurry, air and water through the spray gun to obtain atomized slurry with moderate particle size and atomized water drops, and the high-efficiency atomized desulfurization slurry has higher reaction efficiency than the granular desulfurization agent, so that the calcium-sulfur ratio can be effectively reduced, the investment operation cost of the system is reduced, and the desulfurization efficiency of the system is improved; the atomized water drops can be quickly evaporated, so that the temperature of the flue gas is reduced, and the desulfurization reaction efficiency is improved; the compressed air enhances the fluidization effect and improves the desulfurization reaction efficiency; the three-fluid spray gun is positioned on the smoke inlet pipeline below the venturi tube, and the slurry sprayed by the nozzle of the three-fluid spray gun can be fully mixed with the smoke after passing through the venturi tube, so that the smoke can better react with the slaked lime slurry sprayed by the nozzle of the three-fluid spray gun and the compressed air, and the desulfurization efficiency is improved; the sintering flue gas desulfurization system can introduce part of purified flue gas into raw flue gas, and can automatically adjust the proportion of the purified flue gas and the recycled raw flue gas, so that the risk of bed collapse caused by large fluctuation of flue gas load is prevented; the sintering flue gas desulfurization system can improve the quality of calcium hydroxide slurry, effectively improve desulfurization efficiency and reduce abrasion of system equipment; the sintering flue gas desulfurization system can prevent throttling effect, prevent the cloth bag of the cloth bag dust collector from dewing, and prolong the service life of the filter bag; the sintering flue gas desulfurization system adopts the air outlet on the desulfurization tower and the air inlet on the dust remover, improves the dust removal efficiency by utilizing gravity, and effectively reduces the dust concentration at the outlet of the system.
Drawings
FIG. 1 is a schematic diagram of a sintering flue gas desulfurization system according to an embodiment of the present invention.
Wherein, 1, a desulfurizing tower, 2, a smoke inlet pipeline, 3, a venturi tube, 4, a smoke inlet, 5, a three-fluid spray gun, 6, a slaked lime slurry supply device, 7, a quicklime bin, 8, a quicklime slaker, 9 and a sand remover, 10, a slurry tank, 11, a bag-type dust remover, 12, an ash bin, 13, an induced draft fan, 14, a gas return pipe, 15, a chimney, 16, an air compression pump, 17, a water storage tank, 18, a process water inlet, 19 and a dust conveying pipeline.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples.
Example 1
As a sintering flue gas desulfurization system according to an embodiment of the present invention, as shown in fig. 1, the system includes a slaked lime slurry supply device 6, an air compression pump 16, a water storage tank 17, a three-fluid spray gun 5, a desulfurizing tower 1, a dust removing device, and a chimney 15;
the slaked lime slurry supply device 6 comprises a quicklime bin 7, a quicklime slaker 8, a desander 9 and a slurry tank 10, wherein a discharge port of the quicklime bin 7 is communicated with a feed port of the quicklime slaker 8, a discharge port of the quicklime slaker 8 is communicated with a feed port of the desander 9, a discharge port of the desander 9 is communicated with a feed port of the slurry tank 10, the slurry tank 10 is provided with a process water inlet 18, a discharge port of the slurry tank 10 is communicated with the three-fluid spray gun 5 through a fluid pump, an air compression pump 16 is communicated with the three-fluid spray gun 5 through a pipeline, and a water storage tank 17 is communicated with the three-fluid spray gun 5 through an infusion pump;
the dust removing device comprises a bag-type dust remover 11 and an ash bin 12, wherein the bag-type dust remover 11 is provided with an ash collecting hopper;
the bottom of the desulfurizing tower 1 is provided with a flue gas inlet 4, the top of the desulfurizing tower 1 is provided with a flue gas outlet, the lower part of the flue gas inlet 4 of the desulfurizing tower 1 is communicated with a venturi tube 3, the outlet of the venturi tube 3 is equal to the diameter of the flue gas inlet 4 of the desulfurizing tower 1, the venturi tube 3 is communicated with a flue gas inlet pipeline 2, a nozzle of a three-fluid spray gun 5 is arranged on the side wall of the flue gas inlet pipeline 2 below the venturi tube 3, the flue gas outlet of the desulfurizing tower 1 is communicated with an inlet pipeline of a bag-type dust remover 11, the gas outlet of the bag-type dust remover 11 is communicated with a chimney 15 pipeline through a draught fan 13, a gas return pipe 14 is communicated between the outlet of the draught fan 13 and the flue gas inlet pipeline 2, a discharge port of a dust collecting hopper of the bag-type dust remover 11 is communicated with a dust bin 12 through a pipeline, and the discharge port of the dust collecting hopper of the bag-type dust remover 11 is communicated with the flue gas inlet pipeline 2 through a dust conveying pipeline 19, and the outlet of the dust conveying pipeline 19 is positioned on the side wall of the flue gas inlet pipeline 2.
The application method of the sintering flue gas desulfurization system of the embodiment comprises the following steps:
(1) The quicklime enters a quicklime slaker through a quicklime bin to generate slaked lime;
(2) Filtering and degritting the slaked lime by a degritting machine, feeding the slaked lime into a slurry tank, and adding process water into a process water inlet of the slurry tank to mix with the slaked lime to form slaked lime slurry;
(3) The flue gas to be treated enters the desulfurizing tower from the flue gas inlet pipe through the gas inlet pipe on the flue gas inlet;
(4) The slaked lime slurry, the process water and the compressed air are sprayed into the smoke inlet pipeline through a three-fluid spray gun and enter a desulfurizing tower through a venturi tube along with smoke to carry out desulfurization reaction;
(5) Part of flue gas after desulfurization reaction enters a dust removal device through a flue gas outlet of a desulfurizing tower to remove dust and then enters a chimney to be discharged into the atmosphere through a draught fan, the other part of flue gas enters a flue gas inlet pipeline through a gas return pipe after entering the dust removal device through a flue gas outlet of the desulfurizing tower to remove dust, one part of desulfurization ash obtained after dust removal of a bag-type dust remover is input into a quicklime bin, and the other part of desulfurization ash enters the flue gas inlet pipeline through a dust conveying pipeline; .
The sintering flue gas desulfurization system has wide flue gas load application range, the desulfurization efficiency reaches 95-99%, the flue gas outlet temperature is more than or equal to 75 ℃, the outlet clean flue gas is unsaturated dry flue gas, and no corrosion and no white smoke are generated to the system.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (7)
1. The sintering flue gas desulfurization system is characterized by comprising a slaked lime slurry supply device, an air supply device, a water storage tank, a three-fluid spray gun, a desulfurization tower, a dust removal device and a flue gas inlet pipeline;
the slaked lime slurry supply device is communicated with the three-fluid spray gun through a fluid pump, the air supply device is communicated with the three-fluid spray gun through a pipeline, the air supply device is an air compression pump, and the water storage tank is communicated with the three-fluid spray gun through an infusion pump;
the bottom of the desulfurizing tower is provided with a flue gas inlet, the desulfurizing tower is provided with a flue gas outlet, a venturi tube is communicated below the flue gas inlet of the desulfurizing tower, the venturi tube is communicated with the flue gas inlet pipeline, a nozzle of the three-fluid spray gun is arranged on the flue gas inlet pipeline below the venturi tube, the flue gas outlet of the desulfurizing tower is communicated with the inlet pipeline of the dust removing device, the gas outlet of the dust removing device is communicated with an exhaust pipeline through a draught fan, and a gas return pipe is communicated between the outlet of the draught fan and the flue gas inlet pipeline;
the exhaust pipeline is communicated with a chimney, part of flue gas after desulfurization enters the dust removal device through a flue gas outlet of the desulfurizing tower to remove dust, enters the chimney through a draught fan to be discharged into the atmosphere, and the other part of flue gas enters the dust removal device through a flue gas outlet of the desulfurizing tower to remove dust and enters the flue gas inlet pipeline through a gas return pipe;
the dust removing device comprises a bag-type dust remover and an ash bin, wherein the bag-type dust remover is provided with an ash collecting hopper, a discharge hole of the ash collecting hopper is communicated with the ash bin through a pipeline, a discharge hole of the ash collecting hopper is communicated with the smoke inlet pipeline through a dust conveying pipeline, and an outlet of the dust conveying pipeline is positioned on the side wall of the smoke inlet pipeline; one part of the desulfurized ash obtained after the dust removal of the bag-type dust remover is input into a quicklime bin, and the other part of the desulfurized ash enters a smoke inlet pipeline through a dust conveying pipeline.
2. The desulfurization system according to claim 1, wherein the slaked lime slurry supply device comprises a quicklime silo, a quicklime slaker, a desander and a slurry tank, a discharge port of the quicklime silo is communicated with a feed port of the quicklime slaker, a discharge port of the quicklime slaker is communicated with a feed port of the desander, a discharge port of the desander is communicated with a feed port of the slurry tank, the slurry tank is provided with a process water inlet, and a discharge port of the slurry tank is communicated with a three-fluid spray gun through a fluid pump.
3. The desulfurization system of claim 2, wherein the flue gas outlet of the desulfurization tower is located at the top of the desulfurization tower.
4. The desulfurization system of claim 2, wherein the venturi outlet has a diameter equal to the flue gas inlet diameter of the desulfurization tower.
5. A method of desulphurisation of sintering flue gas, characterized in that the method of desulphurisation of flue gas employs a system according to any one of claims 2 to 4, the method of desulphurisation of flue gas comprising the steps of:
(1) The quicklime enters a quicklime slaker through a quicklime bin to generate slaked lime;
(2) Filtering and degritting the slaked lime by a degritting machine, feeding the slaked lime into a slurry tank, and adding process water into a process water inlet of the slurry tank to mix with the slaked lime to form slaked lime slurry;
(3) The flue gas to be treated enters the desulfurizing tower from the flue gas inlet pipe through the gas inlet pipe on the flue gas inlet;
(4) The slaked lime slurry, the process water and the compressed air are sprayed into the smoke inlet pipeline through the three-fluid spray gun to be mixed with the smoke, and enter the desulfurization tower through the venturi tube to carry out desulfurization reaction;
(5) The flue gas after desulfurization enters a bag-type dust remover through a flue gas outlet of a desulfurizing tower to remove dust, and then enters a chimney through a draught fan to be discharged into the atmosphere.
6. The method for desulfurizing sintered flue gas according to claim 5, wherein in the step (5), flue gas enters a flue gas inlet pipeline through a gas return pipe after entering a bag-type dust collector through a flue gas outlet of a desulfurizing tower for dust removal.
7. The method for desulfurization of sintered flue gas according to claim 5, wherein in step (5), a part of the desulfurized ash obtained after the dust removal by the bag-type dust collector is fed into the quicklime house, and the other part is fed into the flue gas inlet pipe through the dust conveying pipe.
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| CN201911084535.0A CN111214933B (en) | 2019-11-07 | 2019-11-07 | Sintering flue gas desulfurization system and method |
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| CN208356505U (en) * | 2018-03-06 | 2019-01-11 | 洛阳瑞昌环境工程有限公司 | A kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas |
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2019
- 2019-11-07 CN CN201911084535.0A patent/CN111214933B/en active Active
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|---|---|---|---|---|
| CN204320062U (en) * | 2014-12-08 | 2015-05-13 | 浙江蓝天求是环保股份有限公司 | A kind of high effective flue gas cleaning system |
| CN105964071A (en) * | 2016-06-15 | 2016-09-28 | 河北钢铁股份有限公司承德分公司 | Half-dry type flue gas desulfurization device and method |
| CN208356505U (en) * | 2018-03-06 | 2019-01-11 | 洛阳瑞昌环境工程有限公司 | A kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas |
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