CN115430279A - System for sulfur trioxide in desorption smelting flue gas - Google Patents
System for sulfur trioxide in desorption smelting flue gas Download PDFInfo
- Publication number
- CN115430279A CN115430279A CN202210930431.2A CN202210930431A CN115430279A CN 115430279 A CN115430279 A CN 115430279A CN 202210930431 A CN202210930431 A CN 202210930431A CN 115430279 A CN115430279 A CN 115430279A
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- Prior art keywords
- pipeline
- flue gas
- sulfur trioxide
- reducing agent
- injection apparatus
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- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 title claims abstract description 102
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000003546 flue gas Substances 0.000 title claims abstract description 84
- 238000003723 Smelting Methods 0.000 title claims abstract description 47
- 238000003795 desorption Methods 0.000 title claims description 5
- 239000000428 dust Substances 0.000 claims abstract description 52
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 41
- 239000007924 injection Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910001868 water Inorganic materials 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 210000005056 cell body Anatomy 0.000 claims abstract description 16
- 238000005406 washing Methods 0.000 claims description 29
- 239000007789 gas Substances 0.000 claims description 19
- 239000010865 sewage Substances 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 11
- 239000012717 electrostatic precipitator Substances 0.000 claims description 10
- 238000006477 desulfuration reaction Methods 0.000 claims description 9
- 230000023556 desulfurization Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 28
- 238000006722 reduction reaction Methods 0.000 abstract description 8
- 239000002893 slag Substances 0.000 description 11
- 239000002253 acid Substances 0.000 description 10
- 239000002699 waste material Substances 0.000 description 10
- 230000003009 desulfurizing effect Effects 0.000 description 8
- 238000010306 acid treatment Methods 0.000 description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 5
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- 235000011116 calcium hydroxide Nutrition 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/346—Controlling the process
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
- F28D3/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits with tubular conduits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- 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)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a system for removing sulfur trioxide in smelting flue gas, which comprises a smelting furnace; the cooling device is connected with the smelting furnace through a first pipeline, and a water inlet is formed in the cooling device; the dust removing bin is provided with an air inlet and an air outlet, and the air inlet is connected with the cooling device through a second pipeline; reductant cell body and injection apparatus, the reductant cell body passes through the third pipeline and is connected with injection apparatus, the last fourth pipeline that is equipped with of injection apparatus, the fourth pipeline is kept away from injection apparatus one end sets up in the second pipeline, and the fourth pipeline is kept away from one of injection apparatus serves and is equipped with the nozzle. According to the invention, water is added into the cooling device through the water inlet to cool the flue gas, then the reducing agent is added into the reducing agent groove body, and then the reducing agent is sprayed into the second pipeline through the nozzle to carry out reduction reaction with sulfur trioxide in the flue gas, so that the sulfur trioxide in the flue gas is reduced into sulfur dioxide, and the acidity in the flue gas is reduced.
Description
Technical Field
The invention relates to the technical field of atmospheric pollution physical treatment, in particular to a system for removing sulfur trioxide in smelting flue gas.
Background
High-temperature flue gas generated by a pyrogenic process oxygen-enriched smelting furnace contains SO2, SO3, H2O and heavy metal-containing smoke dust, and before the flue gas is used for preparing sulfuric acid, the flue gas needs to be subjected to dust collection and wet purification. The wet-type purification process is to adopt dilute acid to cool and wash the flue gas, the acidity of the washing liquid gradually rises along with the continuous absorption of SO3 in the flue gas by the washing liquid, and the washing liquid needs to be quantitatively discharged to a waste acid treatment system for treatment and then is discharged after reaching the standard. In the waste acid treatment system, ca (OH) 2 is required to be put into production to neutralize acid in the waste acid, SO a large amount of neutralized slag is generated, in order to reduce the amount of the neutralized slag in the waste acid treatment system, the acidity of the waste acid is required to be reduced, mainly SO3 in the flue gas reacts with washing liquid to generate dilute H2SO4, SO that the SO3 in the high-temperature flue gas at the source is required to be reduced to reduce the acidity, and the subsequent use amount of Ca (OH) 2 is reduced, SO that the amount of the neutralized slag is reduced.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a system for removing sulfur trioxide from smelting flue gas, and aims to solve the problem that in the prior art, hydrated lime is added for reducing the acidity of the smelting flue gas, so that a large amount of neutralization slag is generated.
The technical scheme adopted by the invention for solving the technical problem is as follows:
in a first aspect, an embodiment of the present invention provides a system for removing sulfur trioxide from smelting flue gas, including:
smelting a furnace;
the cooling device is connected with the smelting furnace through a first pipeline, and a water inlet is formed in the cooling device;
the dedusting bin is provided with an air inlet and an air outlet, and the air inlet is connected with the cooling device through a second pipeline;
reducing agent cell body and injection apparatus, the reducing agent cell body pass through the third pipeline with injection apparatus connects, the last fourth pipeline that is equipped with of injection apparatus, the fourth pipeline is kept away from injection apparatus one end sets up in the second pipeline, just the fourth pipeline is kept away from injection apparatus serves and is equipped with the nozzle.
As a further improved technical scheme, the system for removing sulfur trioxide from smelting flue gas further comprises:
and the electric dust collector is connected with the gas outlet through a fifth pipeline.
As a further improved technical scheme, the system for removing sulfur trioxide from smelting flue gas further comprises:
the storehouse is collected to the dust, the dust collect the storehouse through the sixth pipeline with the dust removal storehouse bottom is connected, the dust collect the storehouse through the seventh pipeline with the electrostatic precipitator bottom is connected.
As a further improved technical scheme, a flue gas guide plate is arranged in the dust removal bin, and one end of the flue gas guide plate is connected with the top of the dust removal bin.
As a further improved technical scheme, the system for removing sulfur trioxide from smelting flue gas further comprises:
washing storehouse and circulating pump, the washing storehouse pass through the eighth pipeline with the electrostatic precipitator is connected, the washing storehouse bottom through the ninth pipeline intercommunication extremely in the eighth pipeline, the ninth pipeline is located still be equipped with the shower nozzle on one end in the eighth pipeline, just the circulating pump sets up on the ninth pipeline, still be equipped with first valve on the ninth pipeline.
As a further improved technical scheme, the system for removing sulfur trioxide from smelting flue gas further comprises:
a first fan disposed on the eighth conduit.
As a further improved technical scheme, the system for removing sulfur trioxide from smelting flue gas further comprises:
the desulfurization tower is connected with the washing bin through a tenth pipeline, a second valve is arranged on the tenth pipeline, the second fan is communicated into the desulfurization tower through an eleventh pipeline, the recovery bin is connected with the top of the desulfurization tower through a twelfth pipeline, and the recovery bin is connected with the top of the washing bin through a thirteenth pipeline.
As a further improved technical scheme, the system for removing sulfur trioxide from smelting flue gas further comprises:
and the sewage tank is connected with the bottom of the desulfurization tower through a fourteenth pipeline, and a third valve is arranged on the fourteenth pipeline.
As further improvement technical scheme, be equipped with agitating unit on the reductant cell body, agitating unit one end is equipped with the paddle, the one end setting that agitating unit was equipped with the paddle is in bottom in the reductant cell body, just be equipped with water pump and fourth valve on the third pipeline, the last level gauge that is equipped with of injection apparatus.
As a further improved technical scheme, a reducing agent is arranged in the reducing agent tank body, and the reducing agent is sulfur.
Compared with the prior art, the embodiment of the invention has the following advantages:
the embodiment of the invention provides a system for removing sulfur trioxide in smelting flue gas, which comprises a smelting furnace; the cooling device is connected with the smelting furnace through a first pipeline, and a water inlet is formed in the cooling device; the dedusting bin is provided with an air inlet and an air outlet, and the air inlet is connected with the cooling device through a second pipeline; reductant cell body and injection apparatus, the reductant cell body pass through the third pipeline with injection apparatus connects, the last fourth pipeline that is equipped with of injection apparatus, the fourth pipeline is kept away from injection apparatus one end sets up in the second pipeline, just the fourth pipeline is kept away from one of injection apparatus serves and is equipped with the nozzle. According to the invention, water is added into the cooling device through the water inlet to cool the flue gas, then the reducing agent is added into the reducing agent groove body, and then the reducing agent is sprayed into the second pipeline through the nozzle to carry out reduction reaction with sulfur trioxide in the flue gas, so that the sulfur trioxide in the flue gas is reduced into sulfur dioxide, the acidity in the flue gas is reduced, the reduction of the using amount of hydrated lime is further promoted, and the purpose of reducing the amount of neutralized slag is achieved.
Drawings
FIG. 1 is a schematic structural diagram of a system for removing sulfur trioxide from smelting flue gas provided by the present invention;
in the figure: 1. a smelting furnace; 2. a cooling device; 201. a water inlet; 3. a dust removal bin; 301. an air inlet; 302. an air outlet; 303. a flue gas guide plate; 4. a reducing agent tank body; 5. an injection device; 6. a nozzle; 7. an electric dust collector; 8. a dust collection bin; 9. a washing bin; 10. a circulation pump; 11. a spray head; 12. a first valve; 13. a first fan; 14. a desulfurizing tower; 15. a second fan; 16. a recovery bin; 17. a second valve; 18. a sewage tank; 19. a third valve; 20. a stirring device; 201. a paddle; 21. a water pump; 22. a fourth valve; 23. a liquid level meter; l1, a first pipeline; l2, a second pipeline; l3, a third pipeline; l4, a fourth pipeline; l5, a fifth pipeline; l6, a sixth pipeline; l7, a seventh pipeline; l8, an eighth pipeline; l9, a ninth pipeline; l10, a tenth pipeline; l11, an eleventh pipeline; l12, a twelfth pipeline; l13, thirteenth pipe; l14, fourteenth conduit.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
In the embodiments and claims, the terms "a" and "an" can mean "one or more" unless the article is specifically limited.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Since Ca (OH) 2 is required to be input into a waste acid treatment system to neutralize acid in waste acid, a large amount of neutralized slag is generated, in order to reduce the amount of neutralized slag in the waste acid treatment system, the acidity of the waste acid is required to be reduced, and the acidity of the waste acid is mainly the reaction of SO3 in flue gas and washing liquid to generate dilute H2SO4, SO that the SO3 in high-temperature flue gas at the source is required to be reduced to reduce the acidity, and the subsequent use amount of Ca (OH) 2 is reduced to reduce the amount of neutralized slag, SO that the following embodiments are improved to solve the technical problems.
The embodiment is as follows:
please refer to fig. 1. The system for removing sulfur trioxide from smelting flue gas comprises a smelting furnace 1; the cooling device 2 is connected with the smelting furnace 1 through a first pipeline L1, and a water inlet 201 is formed in the cooling device 2; the dust removing bin 3 is provided with an air inlet 301 and an air outlet 302, and the air inlet 301 is connected with the cooling device 2 through a second pipeline L2; reducing agent cell body 4 and injection apparatus 5, reducing agent cell body 4 through third pipeline L3 with injection apparatus 5 is connected, be equipped with fourth pipeline L4 on injection apparatus 5, fourth pipeline L4 keeps away from 5 one end of injection apparatus sets up in the second pipeline L2, just fourth pipeline L4 keeps away from 5 serves and is equipped with nozzle 6.
As shown in fig. 1, in this embodiment, the system for removing sulfur trioxide from smelting flue gas includes a smelting furnace 1, a temperature reduction device 2, a dust removal bin 3, a reducing agent tank 4, and an injection device 5; specifically, the smelting furnace 1 is a source of smelting flue gas, high-temperature flue gas generated by the smelting furnace 1 is conveyed to the cooling device 2 through the first pipeline L1, the temperature of the high-temperature flue gas is about one thousand degrees centigrade, so a water inlet 201 is formed in the cooling device 2, water is added into the cooling device 2 through the water inlet 201, the flue gas is hydrated into water vapor, meanwhile, the heat of the flue gas is absorbed by the water to achieve the cooling effect, the cooled flue gas continuously flows into the second pipeline L2, a reducing agent such as sulfur is placed in the reducing agent tank 4, the reducing agent in the reducing agent tank 4 is conveyed into the injection device 5 through the third pipeline L3, the injection device 5 is provided with the fourth pipeline L4, the upper end of the fourth pipeline L4 penetrates through the pipe wall of the second pipeline L2 to be located in the second pipeline L2, a nozzle 6 is arranged at the end of the upper end of the fourth pipeline L4, the reducing agent in the injection device 5 is sprayed into the second pipeline L2 through the nozzle 6, so that most of the reducing agent in the flue gas will generate sulfur dioxide through a reduction reaction with the sulfur dioxide, the sulfur trioxide and the gas enters the gas outlet through the gas outlet after the dust removal switch 3, and the gas outlet is closed, and the gas outlet is controlled by the dust removal switch 3, and the gas outlet is closed, and the gas outlet is used for collecting the dust removal switch 302, wherein the gas outlet is opened, and the gas outlet is used for collecting the flue gas outlet 3, and the flue gas outlet for collecting the flue gas which is not used for collecting the dust removal switch 3. Still be equipped with flue gas guide plate 303 on the top in the dust removal storehouse 3, work as the flue gas gets into back in the dust removal storehouse 3, the air current direction of flue gas will be regulated and control according to flue gas guide plate 303 direction, for example the vertical setting of flue gas guide plate 303 is in the dust removal storehouse 3, the flue gas will flow to flue gas guide plate 303 bottom and flow to top gas outlet 302 again, flue gas guide plate 303 is used for tentatively removing the dust. According to the system for removing the sulfur trioxide in the smelting flue gas, the reducing agent is added into the reducing agent groove body 4, so that the reducing agent and the flue gas are subjected to reduction reaction in the second pipeline L2, most of the sulfur trioxide is converted into sulfur dioxide, the acidity of the flue gas is reduced, and therefore in the subsequent treatment of the flue gas, due to the fact that the amount of the sulfur trioxide is greatly reduced, the using amount of hydrated lime is greatly reduced, and the amount of the neutralized slag is reduced.
As a further scheme, the system for removing sulfur trioxide from smelting flue gas further comprises an electric dust collector 7, and the electric dust collector 7 is connected with the gas outlet 302 through a fifth pipeline L5. Specifically, what electrostatic precipitator 7 adopted is current electrostatic precipitator 7 on the market, through electrostatic precipitator 7 is right the flue gas in the dust removal storehouse 3 carries out the secondary dust removal.
As a further scheme, in the system of sulfur trioxide in the desorption smelting flue gas, still include the dust and collect storehouse 8, the dust collect storehouse 8 through sixth pipeline L6 with the 3 bottoms in dust removal storehouse are connected, the dust collect storehouse 8 through seventh pipeline L7 with 7 bottoms in electrostatic precipitator are connected. Specifically, flue gas guide plate 303 in the dedusting bin 3 can take place the striking with partial dust and have the effect that blocks the dust, so the dust can drop in dedusting bin 3 bottom, dedusting bin 3 bottom is passed through sixth pipeline L6 with storehouse 8 connection is collected to the dust, so the dust can pass through sixth pipeline L6 gets into in the dust collects storehouse 8, dust after 7 bottoms of electrostatic precipitator contain the secondary and removes dust, and this dust passes through seventh pipeline L7 gets into in the dust collects storehouse 8, through storehouse 8 is collected to the dust is unified to dust in to the flue gas and is collected the processing, avoids causing environmental pollution.
In this embodiment, sulfur trioxide's in desorption smelting flue gas system still includes washing storehouse 9 and circulating pump 10, washing storehouse 9 through eighth pipeline L8 with electrostatic precipitator 7 is connected, 9 bottoms in washing storehouse communicate to through ninth pipeline L9 in the eighth pipeline L8, ninth pipeline L9 is located still be equipped with shower nozzle 11 on one end in the eighth pipeline L8, just circulating pump 10 sets up on the ninth pipeline L9, still be equipped with first valve 12 on the ninth pipeline L9. Specifically, be equipped with the clear water in the washing storehouse 9, at first open first valve 12, then open circulating pump 10, the clear water in the washing storehouse 9 passes through in circulating pump 10 extracts entering ninth pipeline L9, ninth pipeline L9 top is equipped with shower nozzle 11, shower nozzle 11 is arranged in spouting the flue gas in eighth pipeline L8 with clear water in the ninth pipeline L9, circulating pump 10 and shower nozzle 11 circulate the water in the washing storehouse 9 repeatedly and spout flue gas in eighth pipeline L8 for sulfur trioxide and sulfur dioxide in the flue gas all dissolve the water in the washing storehouse 9, therefore the clean water in the washing storehouse 9 is the sewage that has the acidity.
As a further scheme, the system for removing sulfur trioxide from smelting flue gas further comprises a first fan 13, and the first fan 13 is arranged on the eighth pipeline L8. After the first fan 13 is turned on, the suction of the flue gas in the electric dust collector 7 can be accelerated to enter the eighth pipeline L8 and flow to the washing bin 9.
As a further scheme, the system for removing sulfur trioxide from smelting flue gas further includes a desulfurizing tower 14, a second fan 15, a recovery bin 16 for recovering sulfur dioxide, and a sewage tank 18 for recovering sewage, where the desulfurizing tower 14 is connected to the washing bin 9 through a tenth pipeline L10, the tenth pipeline L10 is provided with a second valve 17, the second fan 15 is communicated to the inside of the desulfurizing tower 14 through an eleventh pipeline L11, the recovery bin 16 is connected to the top of the desulfurizing tower 14 through a twelfth pipeline L12, and the recovery bin 16 is connected to the top of the washing bin 9 through a thirteenth pipeline L13. The sewage tank 18 is connected with the bottom of the desulfurizing tower 14 through a fourteenth pipeline L14, and a third valve 19 is arranged on the fourteenth pipeline L14. Specifically, after the second valve 17 is opened, the acid water in the washing chamber 9 enters the desulfurizing tower 14 through the tenth pipe L10, then the second fan 15 is opened, the air of the second fan 15 is injected into the desulfurizing tower 14 to blow towards the sewage, since the sulfur dioxide is easily separated from the water, the sulfur dioxide is separated from the acid water and flows into the recovery chamber 16 through the twelfth pipe L12 by the blowing of the air, and a part of the sulfur dioxide in the flue gas in the washing chamber 9 is not dissolved into the sewage, the sulfur dioxide flows into the recovery chamber 16 through the thirteenth pipe L13, and the available sulfur dioxide is recovered through the recovery chamber 16. The residual sewage in the desulfurization tower 14 is discharged into the sewage tank 18 through the cooperation of the eleventh pipeline L11 and the third valve 19, and at this time, sulfur trioxide contained in the sewage tank 18 is greatly reduced compared with sulfur trioxide contained in the flue gas just discharged from the smelting furnace 1, so that the amount of slaked lime required to be put into the sewage tank 18 is also greatly reduced, thereby achieving the effect of reducing the amount of neutralized slag.
In this embodiment, be equipped with agitating unit 20 on reducing agent cell body 4, agitating unit 20 one end is equipped with paddle 201, the one end setting that agitating unit 20 was equipped with paddle 201 is in bottom in reducing agent cell body 4, just be equipped with water pump 21 and fourth valve 22 on the third pipeline L3, be equipped with level gauge 23 on the injection apparatus 5. Specifically, when sulphur is added into the reducing agent tank 4, the sulphur can be broken and uniformly mixed by the stirring device 20 and the blades 201, then enters the injection device 5 through the opening of the fourth valve 22 and the extraction of the water pump 21 to wait for injection, the injection device 5 is further provided with a liquid level meter 23 for observing the dosage of the reducing agent contained in the injection device 5 in real time, the fourth valve 22 and the water pump 21 are closed when the dosage is nearly full, the reducing agent extraction is stopped, and the water pump 21 and the fourth valve 22 are opened for extraction when the dosage is insufficient.
To sum up, the embodiment of the invention provides a system for removing sulfur trioxide from smelting flue gas, which comprises a smelting furnace 1; the cooling device 2 is connected with the smelting furnace 1 through a first pipeline L1, and a water inlet 201 is formed in the cooling device 2; the dust removing bin 3 is provided with an air inlet 301 and an air outlet 302, and the air inlet 301 is connected with the cooling device 2 through a second pipeline L2; reductant cell body 4 and injection apparatus 5, reductant cell body 4 through third pipeline L3 with injection apparatus 5 is connected, be equipped with fourth pipeline L4 on injection apparatus 5, fourth pipeline L4 keeps away from 5 one end of injection apparatus sets up in the second pipeline L2, just fourth pipeline L4 keeps away from 5 one of end of injection apparatus is equipped with nozzle 6. According to the invention, water is added into the cooling device 2 through the water inlet 201 to cool the flue gas, then the reducing agent is added into the reducing agent tank 4, and then the reducing agent is sprayed into the second pipeline L2 through the nozzle 6 to carry out reduction reaction with sulfur trioxide in the flue gas, so that the sulfur trioxide in the flue gas is reduced into sulfur dioxide, the acidity in the flue gas is reduced, the reduction of the use amount of hydrated lime is further promoted, and the purpose of reducing the amount of neutralized slag is achieved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (10)
1. The utility model provides a system for sulfur trioxide in desorption smelting flue gas which characterized in that includes:
smelting a furnace;
the cooling device is connected with the smelting furnace through a first pipeline, and a water inlet is formed in the cooling device;
the dedusting bin is provided with an air inlet and an air outlet, and the air inlet is connected with the cooling device through a second pipeline;
reductant cell body and injection apparatus, the reductant cell body pass through the third pipeline with injection apparatus connects, the last fourth pipeline that is equipped with of injection apparatus, the fourth pipeline is kept away from injection apparatus one end sets up in the second pipeline, just the fourth pipeline is kept away from one of injection apparatus serves and is equipped with the nozzle.
2. The system for removing sulfur trioxide from metallurgical off-gas of claim 1, further comprising:
and the electric dust collector is connected with the gas outlet through a fifth pipeline.
3. The system for removing sulfur trioxide from metallurgical off-gas of claim 2, further comprising:
the storehouse is collected to the dust, the dust collect the storehouse through the sixth pipeline with the dust removal storehouse bottom is connected, the dust collect the storehouse through the seventh pipeline with the electrostatic precipitator bottom is connected.
4. The system for removing sulfur trioxide from smelting flue gas according to claim 1, wherein a flue gas guide plate is arranged in the dust removing bin, and one end of the flue gas guide plate is connected with the top of the dust removing bin.
5. The system for removing sulfur trioxide from metallurgical off-gas of claim 2, further comprising:
washing storehouse and circulating pump, the washing storehouse pass through the eighth pipeline with the electrostatic precipitator is connected, the washing storehouse bottom through the ninth pipeline intercommunication extremely in the eighth pipeline, the ninth pipeline is located still be equipped with the shower nozzle on one end in the eighth pipeline, just the circulating pump sets up on the ninth pipeline, still be equipped with first valve on the ninth pipeline.
6. The system for removing sulfur trioxide from metallurgical off-gas of claim 5, further comprising:
the first fan is arranged on the eighth pipeline.
7. The system for removing sulfur trioxide from metallurgical off-gas of claim 5, further comprising:
the desulfurization tower is connected with the washing bin through a tenth pipeline, a second valve is arranged on the tenth pipeline, the second fan is communicated into the desulfurization tower through an eleventh pipeline, the recovery bin is connected with the top of the desulfurization tower through a twelfth pipeline, and the recovery bin is connected with the top of the washing bin through a thirteenth pipeline.
8. The system for removing sulfur trioxide from metallurgical off-gas of claim 7, further comprising:
and the sewage tank is connected with the bottom of the desulfurization tower through a fourteenth pipeline, and a third valve is arranged on the fourteenth pipeline.
9. The system for removing sulfur trioxide in smelting flue gas according to claim 1, wherein a stirring device is arranged on the reducing agent tank, a paddle is arranged at one end of the stirring device, the end of the stirring device provided with the paddle is arranged at the bottom in the reducing agent tank, a water pump and a fourth valve are arranged on the third pipeline, and a liquid level meter is arranged on the injection device.
10. The system for removing sulfur trioxide from smelting flue gas according to any one of claims 1 to 9, wherein a reducing agent is arranged in the reducing agent tank, and the reducing agent is sulfur.
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| CN202210930431.2A CN115430279A (en) | 2022-08-03 | 2022-08-03 | System for sulfur trioxide in desorption smelting flue gas |
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| CN109364735A (en) * | 2018-11-07 | 2019-02-22 | 江西理工大学 | A method of being restored using metal sulfide reduces sulfur trioxide in Flue Gas of Nonferrous Smelting |
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| CN109364735A (en) * | 2018-11-07 | 2019-02-22 | 江西理工大学 | A method of being restored using metal sulfide reduces sulfur trioxide in Flue Gas of Nonferrous Smelting |
| CN109364723A (en) * | 2018-11-07 | 2019-02-22 | 江西理工大学 | A kind of method that sulfur trioxide is reduced to sulfur dioxide in Flue Gas of Nonferrous Smelting |
| CN110170241A (en) * | 2019-06-27 | 2019-08-27 | 上海交通大学 | A method of inhibit sulfur trioxide in heavy non-ferrous metal smelting relieving haperacidity flue gas to generate |
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