CN110465178B - Flue gas desulfurization device - Google Patents
Flue gas desulfurization device Download PDFInfo
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- CN110465178B CN110465178B CN201810439038.7A CN201810439038A CN110465178B CN 110465178 B CN110465178 B CN 110465178B CN 201810439038 A CN201810439038 A CN 201810439038A CN 110465178 B CN110465178 B CN 110465178B
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- flue gas
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- storage tank
- tank
- liquid
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000003546 flue gas Substances 0.000 title claims abstract description 110
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 57
- 230000023556 desulfurization Effects 0.000 title claims abstract description 57
- 238000010521 absorption reaction Methods 0.000 claims abstract description 56
- 239000000292 calcium oxide Substances 0.000 claims abstract description 45
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 45
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000007789 gas Substances 0.000 claims abstract description 43
- 239000000779 smoke Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 39
- 239000000428 dust Substances 0.000 claims abstract description 37
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000011084 recovery Methods 0.000 claims abstract description 35
- 239000002918 waste heat Substances 0.000 claims abstract description 31
- 239000002245 particle Substances 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 83
- 239000007921 spray Substances 0.000 claims description 24
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 18
- 230000003009 desulfurizing effect Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 13
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 11
- 238000000889 atomisation Methods 0.000 claims description 11
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 5
- 150000004763 sulfides Chemical class 0.000 description 5
- 238000005086 pumping Methods 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- HVBSAKJJOYLTQU-UHFFFAOYSA-N 4-aminobenzenesulfonic acid Chemical compound NC1=CC=C(S(O)(=O)=O)C=C1 HVBSAKJJOYLTQU-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000010261 calcium sulphite Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- MAHNFPMIPQKPPI-UHFFFAOYSA-N disulfur Chemical compound S=S MAHNFPMIPQKPPI-UHFFFAOYSA-N 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229950000244 sulfanilic acid Drugs 0.000 description 1
- 239000002699 waste material Substances 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
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- 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
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- 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
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a flue gas desulfurization device which comprises an air inlet pipe, a waste heat recovery box, a heat energy converter, calcium oxide particles, sodium hydroxide solution, an atomizing nozzle and a sulfuric acid solution, wherein the air inlet pipe is arranged on an air inlet arranged on the left side of the waste heat recovery box, a smoke filter screen is arranged in the waste heat recovery box, a heat absorption pipeline is arranged in the waste heat recovery box on the right side of the smoke filter screen, the left end of the heat absorption pipeline is arranged on a water outlet of a first conveying pump, a water storage tank is arranged on the right side of the first conveying pump, the heat energy converter is arranged on the right side of the water storage tank, a gas transmission pipeline is arranged on a gas outlet on the right side of the waste heat recovery box, and a gas transmission pump is arranged on the gas transmission pipeline. The invention solves the problems that the sulfur in the flue gas is not sufficiently removed, and the flue gas still contains a large amount of dust after being treated.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization equipment, in particular to a flue gas desulfurization device.
Background
Flue Gas Desulfurization (FGD) is an efficient desulfurization process for large-scale application in the industry. Desulfurization techniques can be classified into three types of dry, semi-dry and wet methods according to the forms of sulfide absorbers and byproducts. The dry desulfurization process mainly uses a solid absorbent to remove SO2 in flue gas, generally sprays limestone fine powder into a hearth, SO that the limestone fine powder is heated and decomposed into CaO, absorbs SO2 in the flue gas to generate CaSO3, and the CaSO3 and fly ash are collected in a dust remover or discharged through a chimney. The wet flue gas desulfurization adopts gas-liquid reaction of a liquid absorbent under the ionic condition, SO that SO2 in the flue gas is removed, and the system has the advantages of simple equipment, stable and reliable operation and high desulfurization efficiency. The method has the greatest advantages that no waste water or waste acid is discharged in the treatment, and secondary pollution is reduced; the disadvantage is low desulfurization efficiency and huge equipment. The wet desulfurization adopts a liquid absorbent to wash the flue gas to remove SO2, the equipment is simpler, the operation is easy, and the desulfurization efficiency is high; but the flue gas temperature after desulfurization is lower, and the corrosion of equipment is serious by a dry method.
However, the conventional flue gas desulfurization apparatus has the following disadvantages:
1. in the existing flue gas desulfurization device, sulfur in flue gas is not removed sufficiently in the desulfurization process;
2. the existing flue gas desulfurization device still contains a large amount of dust and the like after the flue gas is treated, and the flue gas is discharged to the outside to pollute the external environment.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a flue gas desulfurization device, which solves the problems that sulfur in flue gas is not removed sufficiently and the flue gas still contains a large amount of dust after being treated.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a flue gas desulfurization device, includes intake pipe, waste heat recovery case, heat energy converter, calcium oxide granule, sodium hydroxide solution, atomizer and sulfuric acid solution, the intake pipe is installed on the air inlet that waste heat recovery case left side set up, waste heat recovery case internally mounted has the smoke and dust filter screen, waste heat recovery case internally mounted on smoke and dust filter screen right side has the heat absorption pipeline, the left end of heat absorption pipeline is installed on the delivery port of first delivery pump, the storage water tank is installed on the right side of first delivery pump, heat energy converter is installed on the right side of storage water tank, install the gas pipeline on the gas outlet on waste heat recovery case right side, install the gas transmission pump on the gas pipeline on the gas transmission pump right side and install the calcium oxide bin, the calcium oxide granule of evenly distributed in the calcium oxide bin, the liquid storage tank is installed on the right side, sodium hydroxide solution is installed on the right side of liquid storage tank, the liquid storage tank installs the liquid receiver, the inside spray jet spray pipe is installed to the atomizer on the bottom of the gas transmission pipe, the inside spray liquid tank is installed to the inside spray.
Preferably, a dust collecting box is arranged at the lower part of the left side of the smoke dust filter screen, and the dust collecting box is arranged on a shell at the lower part of the waste heat recovery box.
Preferably, the first delivery pump is communicated with the water storage tank through a water pumping pipe, the water storage tank is communicated with the heat energy converter through a connecting pipe, and a water inlet at the lower part of the heat energy converter is communicated with the right end of the heat absorption pipeline.
Preferably, the calcium oxide storage tank is communicated with the liquid storage tank through a gas pipeline, and the liquid level of the upper part of the sodium hydroxide solution in the liquid storage pipe is lower than the highest end of the gas pipeline between the calcium oxide storage tank and the liquid storage tank.
Preferably, the liquid storage tank is communicated with the desulfurization tank through a gas pipeline, and the gas pipeline penetrates through the outer wall of the desulfurization tank and extends to the middle position of the lower part of the atomization nozzle inside the desulfurization tank.
Preferably, the liquid spraying pipe is communicated with the liquid storage tank through an ammonia water pipeline, and a second delivery pump is arranged on the ammonia water pipeline.
Preferably, the atomizing spray heads are distributed on the liquid spraying pipe at equal intervals, and the atomizing spray heads are communicated with the liquid spraying pipe.
Preferably, a demister is arranged on the inner wall of the desulfurizing tank at the upper part of the liquid spraying pipe, and a smoke exhaust fan is arranged on the outlet at the upper part of the desulfurizing tank.
Preferably, the heat energy converter is electrically connected with the external storage battery through a transmission line.
The invention also provides a using method of the flue gas desulfurization device, which is characterized by comprising the following steps:
s1: the flue gas enters the waste heat recovery box from the air inlet pipe, dust or particles in the flue gas are filtered by the smoke filter screen, and the filtered dust or particles are scattered into the dust inlet box;
s2: the filtered flue gas passes through a smoke filter screen, the first conveying pump is operated to convey the heat absorption liquid in the water storage tank into the heat absorption pipeline from the water pumping pipe, the heat absorption liquid is operated in the heat absorption pipeline to absorb heat energy in the flue gas, the heat absorption liquid after heat energy absorption is conveyed into the heat energy converter, the heat energy converter is operated to convert the heat energy in the heat absorption liquid into electric energy and convey the electric energy into an external storage battery, the utilization rate of energy is improved, and the heat absorption liquid after heat energy release is conveyed into the water storage tank from the connecting pipe for recycling;
s3: the flue gas after heat energy recovery is conveyed into calcium oxide particles through a gas pipeline, and calcium oxide reacts with sulfur dioxide in the flue gas to remove sulfide in the flue gas;
s4: the treated flue gas is conveyed into sodium hydroxide solution through a gas pipeline to remove sulfide in the flue gas again;
s5: the treated flue gas is conveyed into a desulfurization tank through a gas conveying pipeline, a second conveying pump is operated to convey a sulfuric acid solution into a liquid spraying pipe through an ammonia water pipeline, the sulfuric acid solution is sprayed out from an atomization nozzle, and sulfide in the flue gas is removed again;
s6: and the smoke exhaust fan operates at the same time, the smoke in the desulfurization tank is extracted, and the smoke is discharged to the outside from the smoke exhaust fan after the sulfuric acid solution in the smoke is removed by the demister.
(III) beneficial effects
The invention provides a flue gas desulfurization device, which has the following beneficial effects:
(1) When the flue gas desulfurization device is operated, filtered flue gas passes through the smoke filter screen, the first conveying pump is operated to convey the heat absorption liquid in the water storage tank into the heat absorption pipeline from the water suction pipe, the heat absorption liquid is operated in the heat absorption pipeline to absorb heat energy in flue gas, the heat absorption liquid after heat energy absorption is conveyed into the heat energy converter, the heat energy converter is operated to convert the heat energy in the heat absorption liquid into electric energy and is conveyed into an external storage battery, the utilization rate of energy is improved, the heat absorption liquid after heat energy release is conveyed into the water storage tank from the connecting pipe for recycling, the flue gas after heat energy recovery is conveyed into the calcium oxide particles through the gas conveying pipeline, the calcium oxide reacts with sulfur dioxide in the flue gas to remove sulfides in the flue gas, the treated flue gas is conveyed into the sodium hydroxide solution through the gas conveying pipeline to remove the sulfides in the flue gas again, the treated flue gas is conveyed into the desulfurization tank through the gas conveying pipeline, the second conveying pump is operated to convey the sulfuric acid solution into the liquid spraying pipe, the sulfuric acid solution is sprayed out of the atomization nozzle, the sulfides in the flue gas are removed again, and meanwhile the flue gas fan is operated, the flue gas in the desulfurization tank is extracted, the flue gas in the flue gas after the flue gas is removed from the desulfurization device, the sulfur sulfide in the flue gas is removed from the flue gas, the flue gas is completely removed from the flue gas, and the sulfide in the flue gas is thoroughly removed from the flue gas, and the outside.
(2) According to the invention, the smoke enters the waste heat recovery box from the air inlet pipe through the arranged smoke filter screen, dust or particles in the smoke are filtered by the smoke filter screen, the filtered dust or particles are scattered into the dust inlet box, the structure is simple, the dust or particles in the smoke are simply and conveniently removed, the dust or particles are effectively prevented from polluting the external environment, and the problem that the smoke still contains a large amount of dust and the like after being treated and is discharged to the external environment is solved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural diagram of a thermal energy converter according to the present invention.
In the figure: the device comprises a gas inlet pipe 1, a waste heat recovery box 2, a smoke filter screen 3, a dust collection box 4, a first conveying pump 5, a water storage tank 6, a heat energy converter 7, a gas conveying pipeline 8, a gas conveying pump 9, a calcium oxide storage box 10, calcium oxide particles 11, a liquid storage tank 12, a sodium hydroxide solution 13, a desulfurizing tank 14, a liquid spraying pipe 15, an atomizing nozzle 16, a liquid storage tank 17, a sulfuric acid solution 18, an ammonia water pipeline 19, a second conveying pump 20, a demister 21, a smoke exhaust fan 22, a heat absorption pipeline 23, a water pumping pipe 24 and a connecting pipe 25.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, an embodiment of the present invention is provided; the flue gas desulfurization device comprises an air inlet pipe 1, a waste heat recovery box 2, a heat energy converter 7, calcium oxide particles 11, sodium hydroxide solution 13, an atomizing nozzle 16 and a sulfuric acid solution 18, wherein the air inlet pipe 1 is arranged on an air inlet arranged on the left side of the waste heat recovery box 2, a smoke filter screen 3 is arranged in the interior of the waste heat recovery box 2, a dust collection box 4 is arranged at the lower part of the left side of the smoke filter screen 3, the dust collection box 4 is arranged on a shell at the lower part of the waste heat recovery box 2, a heat absorption pipeline 23 is arranged in the interior of the waste heat recovery box 2 at the right side of the smoke filter screen 3, the left end of the heat absorption pipeline 23 is arranged on a water outlet of a first conveying pump 5, a water storage tank 6 is arranged at the right side of the water storage tank 6, a heat energy converter 7 is electrically connected with an external storage battery through a transmission line, the first conveying pump 5 is mutually communicated with the water storage tank 6 through a water suction pipe 24, the water storage tank 6 is mutually communicated with the heat energy converter 7 through a connecting pipe 25, the water inlet at the lower part of the heat energy converter 7 is mutually communicated with the right end of the heat absorption pipeline 23, a calcium oxide solution storage tank 8 is arranged at the right side of the left side of the waste heat recovery box 2, a calcium oxide particles 12 is arranged at the right side of the water storage tank 12, a calcium oxide particles 10 is filled in the calcium oxide solution storage tank 10 is uniformly filled in the calcium oxide storage tank 10 is arranged at the right side of the calcium oxide storage tank 12, the calcium oxide particles 12 is filled in the calcium oxide tank 10 at the calcium oxide storage tank 10, the calcium oxide solution is filled in the calcium oxide tank is filled into the calcium oxide tank 10, the calcium oxide solution is filled with the calcium oxide solution is filled into the calcium oxide solution, and the calcium oxide solution is. The liquid storage tank 12 and the desulfurization tank 14 are mutually communicated through the gas transmission pipeline 8, the gas transmission pipeline 8 penetrates through the outer wall of the desulfurization tank 14 and extends to the middle position of the lower part of an atomization spray nozzle 16 in the desulfurization tank 14, a spray pipe 15 is installed in the desulfurization tank 14, the spray pipe 15 is mutually communicated with a liquid storage tank 17 through an ammonia water pipeline 19, a second conveying pump 20 is installed on the ammonia water pipeline 19, the atomization spray nozzles 16 are installed on the spray pipe 15, the atomization spray nozzles 16 are distributed on the spray pipe 15 at equal intervals, the atomization spray nozzles 16 are mutually communicated with the spray pipe 15, a demister 21 is installed on the inner wall of the desulfurization tank 14 at the upper part of the spray pipe 15, a smoke exhaust fan 22 is installed on the outlet of the upper part of the desulfurization tank 14, the liquid storage tank 17 is installed at the tank bottom of the desulfurization tank 14 at the lower part of the atomization spray nozzle 16, and a sulfuric acid solution 18 is contained in the liquid storage tank 17.
The invention also provides a using method of the flue gas desulfurization device, which is characterized by comprising the following steps:
s1: the flue gas enters the waste heat recovery box 2 from the air inlet pipe 1, dust or particles in the flue gas are filtered by the dust filter screen 3, and the filtered dust or particles are scattered into the dust inlet box 4;
s2: the filtered flue gas passes through the smoke filter screen 3, the first delivery pump 5 is operated to deliver the heat absorption liquid in the water storage tank 6 from the water pumping pipe 24 to the heat absorption pipeline 23, the heat absorption liquid is operated in the heat absorption pipeline 23 to absorb the heat energy in the flue gas, the heat absorption liquid after the heat energy absorption is delivered to the heat energy converter 7, the heat energy converter 7 is operated to convert the heat energy in the heat absorption liquid into electric energy and deliver the electric energy to an external storage battery, the utilization rate of energy is improved, and the heat absorption liquid after the heat energy is released is delivered to the water storage tank 6 from the connecting pipe 25 for recycling;
s3: the flue gas after heat energy recovery is conveyed into calcium oxide particles 11 through a gas pipeline 8, and calcium oxide reacts with sulfur dioxide in the flue gas to remove sulfide in the flue gas;
s4: the treated flue gas is conveyed into a sodium hydroxide solution 13 through a gas pipeline 8 to remove sulfide in the flue gas again;
s5: the treated flue gas is conveyed into the desulfurization tank 14 through the gas conveying pipeline 8, the second conveying pump 20 is operated to convey the sulfuric acid solution 18 into the liquid spraying pipe 15 through the ammonia water pipeline 19, and the sulfuric acid solution 18 is sprayed out from the atomizing nozzle 16 to remove sulfide in the flue gas again;
s6: the smoke extractor 22 is operated at the same time, the smoke in the desulfurization tank 14 is extracted, the smoke is cleaned of the sulfuric acid solution 18 in the smoke by the demister 21, and the smoke is discharged to the outside from the smoke extractor 22.
Working principle: when the flue gas treatment device is operated, flue gas enters the waste heat recovery box 2 from the air inlet pipe 1, dust or particles and the like in the flue gas are filtered by the dust filter screen 3, the filtered dust or particles are scattered into the dust inlet box 4, the filtered flue gas passes through the dust filter screen 3, the first conveying pump 5 is operated to convey the heat absorption liquid in the water storage tank 6 from the water suction pipe 24 into the heat absorption pipeline 23, the heat absorption liquid is operated to absorb heat energy in the flue gas in the heat absorption pipeline 23, the heat absorption liquid after the heat energy is conveyed into the heat energy converter 7, the heat energy converter 7 is operated to convert the heat energy in the heat absorption liquid into electric energy and is conveyed into an external storage battery, the utilization rate of energy sources is improved, the heat absorption liquid after the heat energy is released is conveyed into the water storage tank 6 from the connecting pipe 25 for cyclic utilization, the flue gas after the heat energy is recovered is conveyed into the calcium oxide particles 11 through the gas conveying pipeline 8, the calcium oxide reacts with sulfur dioxide in the flue gas to remove sulfides in the flue gas, the treated flue gas is conveyed into the acid solution 13 through the water suction pipe 8, the heat absorption liquid is operated to remove the sulfides in the acid solution 13 again, the treated flue gas is conveyed into the gas conveying pipeline 8 to the desulfurizing gas pipeline 14, the heat absorption liquid is conveyed into the desulfurizing liquid 14 through the heat absorption liquid, the heat absorption liquid after the heat absorption liquid is conveyed into the desulfurizing liquid 18 through the water conveying pipeline 18, the desulfurizing liquid is conveyed into the desulfurizing liquid 18, the desulfurizing liquid is sprayed into the desulfurizing liquid 18, and the desulfurizing liquid is discharged from the desulfurizing liquid to the desulfurizing liquid 18, and the flue gas is discharged from the desulfurizing liquid to the flue gas is discharged from the desulfurizing liquid 18, and discharged from the flue gas is discharged to the flue gas, and the flue gas is discharged from the flue gas, and the flue gas is sprayed to the flue gas is discharged.
In summary, the invention solves the problems that the sulfur in the flue gas is not sufficiently removed and the flue gas still contains a large amount of dust after the treatment by arranging the air inlet pipe 1, the waste heat recovery box 2, the heat energy converter 7, the calcium oxide particles 11, the sodium hydroxide solution 13, the atomizing nozzle 16 and the sulfanilic acid solution 18.
It is noted that relational terms such as first and second, and the like are 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. Moreover, 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.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The flue gas desulfurization device comprises an air inlet pipe (1), a waste heat recovery box (2), a heat energy converter (7), calcium oxide particles (11), sodium hydroxide solution (13), an atomization nozzle (16) and a sulfuric acid solution (18), and is characterized in that: the utility model discloses a desulfurization device, including waste heat recovery case (2), air intake pipe (1), air intake pipe (2) are installed on the air inlet that waste heat recovery case (2) left side set up, internally mounted of waste heat recovery case (2) on waste heat recovery case (2) right side has smoke filter screen (3) heat absorption pipeline (23), the left end of heat absorption pipeline (23) is installed on the delivery port of first delivery pump (5), storage water tank (6) are installed on the right side of first delivery pump (5), thermal energy converter (7) are installed on the right side of storage water tank (6), install gas pipeline (8) on the gas outlet on waste heat recovery case (2), install gas transmission pump (9) on gas transmission pipeline (8) on gas transmission pump (9) right side, install calcium oxide bin (10), the intussuseption of calcium oxide bin (10) is filled with evenly distributed's calcium oxide granule (11), liquid storage tank (12) are installed on the right side of calcium oxide bin (10), spray jet spray pipe (14) are installed on the right side of spray pipe (14), a liquid storage tank (17) is arranged at the tank bottom of a desulfurizing tank (14) at the lower part of the atomizing nozzle (16), and a sulfuric acid solution (18) is contained in the liquid storage tank (17);
the lower part of the left side of the smoke dust filter screen (3) is provided with a dust box (4), and the dust box (4) is arranged on the shell of the lower part of the waste heat recovery box (2);
the first conveying pump (5) is communicated with the water storage tank (6) through a water suction pipe (24), the water storage tank (6) is communicated with the heat energy converter (7) through a connecting pipe (25), and a water inlet at the lower part of the heat energy converter (7) is communicated with the right end of the heat absorption pipeline (23);
the application method of the flue gas desulfurization device comprises the following steps:
(S1): the flue gas enters the waste heat recovery box (2) from the air inlet pipe (1), dust, particles and the like in the flue gas are filtered out by the smoke filter screen (3), and the filtered dust or particles are scattered into the dust collection box (4);
(S2): the filtered flue gas passes through a smoke filter screen (3), a first conveying pump (5) is operated to convey heat absorption liquid in a water storage tank (6) from a water suction pipe (24) to a heat absorption pipeline (23), the heat absorption liquid is operated in the heat absorption pipeline (23) to absorb heat energy in the flue gas, the heat absorption liquid after heat energy absorption is conveyed to a heat energy converter (7), the heat energy converter (7) is operated to convert the heat energy in the heat absorption liquid into electric energy and convey the electric energy to an external storage battery, the utilization rate of energy is improved, and the heat absorption liquid after heat energy release is conveyed to the water storage tank (6) from a connecting pipe (25) for recycling;
(S3): the flue gas after heat energy recovery is conveyed into calcium oxide particles (11) through a gas pipeline (8), and calcium oxide reacts with sulfur dioxide in the flue gas to remove sulfide in the flue gas;
(S4): the treated flue gas is conveyed to a sodium hydroxide solution (13) through a gas pipeline (8) to remove sulfide in the flue gas again;
(S5): the treated flue gas is conveyed into a desulfurization tank (14) through a gas conveying pipeline (8), a second conveying pump (20) operates to convey a sulfuric acid solution (18) into a liquid spraying pipe (15) through an ammonia water pipeline (19), the sulfuric acid solution (18) is sprayed out from an atomization spray head (16), and sulfide in the flue gas is removed again;
(S6): the smoke exhausting fan (22) operates at the same time, the smoke in the desulfurization tank (14) is extracted, and the smoke is discharged to the outside from the smoke exhausting fan (22) after the sulfuric acid solution (18) in the smoke is removed by the demister (21).
2. The flue gas desulfurization device according to claim 1, wherein: the calcium oxide storage tank (10) is communicated with the liquid storage tank (12) through the gas transmission pipeline (8), and the liquid level of the upper part of the sodium hydroxide solution (13) in the liquid storage tank (12) is lower than the highest end of the gas transmission pipeline (8) between the calcium oxide storage tank (10) and the liquid storage tank (12).
3. The flue gas desulfurization device according to claim 1, wherein: the liquid storage tank (12) is communicated with the desulfurization tank (14) through the gas pipeline (8), and the gas pipeline (8) penetrates through the outer wall of the desulfurization tank (14) and extends to the middle position of the lower part of an atomization nozzle (16) in the desulfurization tank (14).
4. The flue gas desulfurization device according to claim 1, wherein: the liquid spraying pipe (15) is communicated with the liquid storage tank (17) through an ammonia water pipeline (19), and a second conveying pump (20) is arranged on the ammonia water pipeline (19).
5. The flue gas desulfurization device according to claim 1, wherein: the atomizing spray heads (16) are distributed on the liquid spraying pipe (15) at equal intervals, and the atomizing spray heads (16) are communicated with the liquid spraying pipe (15).
6. The flue gas desulfurization device according to claim 1, wherein: a demister (21) is arranged on the inner wall of the desulfurizing tank (14) at the upper part of the liquid spraying pipe (15), and a smoke exhaust fan (22) is arranged on the outlet at the upper part of the desulfurizing tank (14).
7. The flue gas desulfurization device according to claim 1, wherein: the heat energy converter (7) is electrically connected with an external storage battery through a transmission line.
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| CN201810439038.7A CN110465178B (en) | 2018-05-09 | 2018-05-09 | Flue gas desulfurization device |
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| CN201810439038.7A CN110465178B (en) | 2018-05-09 | 2018-05-09 | Flue gas desulfurization device |
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| CN111905538A (en) * | 2020-07-20 | 2020-11-10 | 来安县华阳玻璃制品有限公司 | Glass processing waste gas desulphurization device with low energy consumption |
| CN112023658A (en) * | 2020-08-31 | 2020-12-04 | 江苏康祥实业集团有限公司 | Multisection processing system to sodium silicate tail gas |
| CN112933910B (en) * | 2021-03-08 | 2022-11-08 | 上海交通大学 | Moving bed coupling absorption desulfurization method based on flue gas semidry method |
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