CN108479311A - A kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas - Google Patents
A kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas Download PDFInfo
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- CN108479311A CN108479311A CN201810343609.7A CN201810343609A CN108479311A CN 108479311 A CN108479311 A CN 108479311A CN 201810343609 A CN201810343609 A CN 201810343609A CN 108479311 A CN108479311 A CN 108479311A
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- tower
- flue gas
- sulfur dioxide
- absorption
- regeneration
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- 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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- 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
- B01D53/14—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 by absorption
- B01D53/1418—Recovery of products
-
- 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
- B01D53/14—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 by absorption
- B01D53/1425—Regeneration of liquid absorbents
Abstract
A kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas, step are：1. regeneration lead fume initially enters the acid mist removed by electric demisting after purification system washing cools down in flue gas, then enters absorption tower by absorb the bottom of the tower.2. washed purified flue gas enters absorption tower, with spray and under absorbing liquid occur in packing layer mass-and heat-transfer effect, flue gas after absorption in absorption tower tower top after two-stage machinery demister, then after electrostatic precipitator advanced treating, send to tower top chimney qualified discharge.3. absorbing SO2Rich solution be discharged by bottom of tower, with the lean solution after regeneration after poor rich liquid heat exchanger exchanges heat, desorber, desorption and regeneration are entered by tower top, bottom of tower obtains lean solution, and tower top obtains high-purity SO2Gas.4. the absorbent after regeneration returns to absorption tower after poor rich liquid heat exchanger, lean solution cooler cooling and recycles.5. the SO desorbed2Saturated vapor enters after condenser, separator condensation separation prepares by-product sulfuric acid into acid making system.
Description
Technical field
The present invention relates to tail gas disposal technique fields, and in particular to a kind of to utilize the smelting of cyclic absorption reviver industry and ring
Collect SO in flue gas2Method.
Background technology
The emission control of high standard requires to promote the progress of flue gas desulfurization technique, and traditional maturation includes lime stone-
Gypsum, ammonia process, sodium alkali already fall behind the times the paces of advance, a batch such as Citrate Buffer, activated coke method, amine process
New sulfur removal technology gradually comes into the visual field of people, however these new processes are also shown sometimes when in face of complicated desulfurization environment
It shows to be not suitable with.
Regenerating desulfurization technology is a kind of novel wet method organic amine desulfurization technology, the characteristics of to nonferrous smelting industry flue gas
With good matching applicability.Nonferrous smelting industry flue gas usually has complicated component, SO2The features such as fluctuation is strong.Using
The tradition sulfur removal technology such as lime stone-gypsum, sodium alkali handles such flue gas, and control difficulty is big, operating cost is high, has waste residue
It generates, and it is difficult to ensure that processing tail gas stably reaching standard.Meanwhile the heavy metal that contains of flue gas can enter desulfurizing byproduct gypsum,
In sodium sulphate.In terms of the case applied at present, desulfurizing byproduct grade is low, and market is poor, can not be converted into economic benefit, may
Cause largely to store up, the situation of secondary pollution.
Renewable organic amine desulfurization technology can be very good the characteristics of adapting to flue gas during smelting, by rational technological design,
Realize the discharge of desulfidation tail gas stably reaching standard, while by-product is high-purity gaseous state SO2(＞ 99%), can be according to enterprise or market
Demand is prepared into the vulcanization chemical product such as sulfuric acid, sulfur dioxide liquid.Regenerating desulfurization technology has been truly realized without slag, without secondary dirt
Dye discharge.The environmental issue for not only efficiently solving enterprise, turns waste into wealth simultaneously, be a kind of green cleaning, economical and efficient it is de-
Sulphur technique.
Invention content
Technical problem to be solved by the present invention lies in provide one kind to can be very good to adapt to reviver enterprise flue gas during smelting
Feature regenerates lead ring collection and flue gas during smelting SO using ionic liquid cyclic absorption2Method.
The technical problems to be solved by the invention are realized using following technical scheme：
A kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas, including gas purification and demisting system
System, SO2It absorbs and demister system, desorption system, ion liquid purification system；The specific method is as follows：
S1. regeneration lead ring collection flue gas initially enters the cooling of purification combined column and washing, enters purification combined column by bottom of tower, drops
Low flue-gas temperature, and remove the SO in flue gas3, acid mist and solid impurity etc., regeneration lead fume is entered by absorb the bottom of the tower again
SO2Absorption tower；
Above-mentioned acid mist is the acid mist removed by preposition electric demisting in flue gas；
S2. in absorption tower, regeneration lead fume and ionic liquid absorbent counter current contacting, SO2It is absorbed；
S3. in absorption tower, further cooling and dedusting, catalyst dust enter tower to regeneration lead fume with wash cycle liquid
In the liquid pool of bottom, with absorption SO2Rich solution be discharged by bottom of tower, be filtered, remove chalk dust removing；
S4. SO is absorbed2Rich solution be discharged by bottom of tower, exchange heat through poor rich liquid heat exchanger with the lean solution after regeneration after filter
Afterwards, desorber, desorption and regeneration are entered by tower top, bottom of tower obtains lean solution, and tower top obtains high-purity sulfur dioxide gas；
S5. the absorbent (lean solution) after regenerating returns to absorption tower cycle after poor rich liquid heat exchanger, lean solution cooler cooling
It uses；
S6. the SO desorbed2Saturated vapor enters after condenser, separator condensation separation prepares by-product into acid making system
Object sulfuric acid.
Further, above-mentioned absorption tower has the function of dedusting, and the rich solution containing catalyst dust enters after being discharged by bottom of tower
Filter carries out solid-liquor separation, removes chalk dust removing.
Further, above-mentioned absorption tower is spiral-flow plate-type spray column, and one layer of equal cyclone flowing plate, 3-6 layers of spray are furnished in tower
Layer, two layers of demister.
Further, at least one layer of lean solution come from after parsing, at least one layer come from absorption tower bottom.
Further, above-mentioned desorber is the higher packed tower of gas liquid contacting efficiency, and double layer of metal ripple rule are furnished in tower
Whole filler.
Further, above-mentioned ion liquid purification system using freezing and crystallizing add ion exchange resin adsorb by the way of remove from
The thermal-stable salt generated in sub- liquid sweetening process.
Further, cation is binary amine in above-mentioned ionic liquid absorbent, anion is lactic acid or phosphate radical.
Further, above-mentioned absorbing reaction temperature is 35~60 DEG C, and desorption reaction temperature is 110~115 DEG C, and pressure is
Normal pressure.
Further, the afterheat steam of oil plant can be used in above-mentioned desorber heating.
The beneficial effects of the invention are as follows：
1, the characteristics of regenerative sulfur binding technology can be very good to adapt to reviver enterprise's flue gas during smelting, is set by rational technique
Meter realizes the discharge of desulfidation tail gas stably reaching standard, while by-product is high-purity gaseous state SO2(＞ 99%), can be according to enterprise or city
Field demand is prepared into the vulcanization chemical product such as sulfuric acid, sulfur dioxide liquid.
2, regenerating desulfurization technology be a kind of regenerating desulfurization technology, it can be achieved that absorbent recycling, need not hold
Continuous supplement, also solves the slag emission problem of conventional wet desulfurization.Regenerating desulfurization technology has been truly realized without slag, without secondary dirt
Dye discharge.The environmental issue for not only efficiently solving enterprise, turns waste into wealth simultaneously, be a kind of green cleaning, economical and efficient it is de-
Sulphur technique.
3, cycle and regeneration of the regenerating desulfurization technology by absorbent, the SO in efficient absorption flue gas2Gas utilizes enterprise
The low-pressure steam that industry is had more than needed on a small quantity, heating rich solution (are enriched SO2Absorbing liquid), by SO2It desorbs, obtains from absorbing liquid
High-purity is saturated SO2Gas can be used to Sulphuric acid, liquid SO2Deng vulcanization chemical product.Lean solution (absorbing liquid after desorption), which returns to, is
System cycle reabsorbs, and realizes that the recycling of absorbing liquid, desulfuration efficiency may be up to 99.5%.Its main operating cost is that low pressure is full
And steam, enterprise can be made full use of to have more than needed thermal energy, so that corporate resources is obtained most effective utilization, production cost can substantially drop
It is low.
4, regenerating desulfurization agent is to the SO in flue gas2Have it is highly selective, absorption efficiency may be up to 99.5% or more, it can be achieved that
Flue gas after desulfurization SO2Concentration of emission is less than 50mg/Nm3.And the absorptive capacity adjustable extent of absorbent is big, can not significantly increase
In the case of adding other costs, by adjusting stripping vapor consumption by flue gas after desulfurization SO2Concentration of emission further decreases, and adapts to
The environmental requirement being increasingly stringenter.
Description of the drawings
Fig. 1 is present invention process flow chart.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
1 (such as Fig. 1 of embodiment：)
1, regeneration lead fume initially enters purification system, after the washing cooling of purification and washing tower, passes through preposition electric demisting
The smog in flue gas is removed, then SO is entered by absorb the bottom of the tower2Absorption tower.
2, the flue gas after preprocessed washing, purifying enters absorption tower, with spray and under absorbing liquid occur in packing layer
Mass-and heat-transfer acts on, flue gas after absorption in absorption tower tower top after two-stage machinery demister, then through electrostatic precipitator depth
After processing, send to tower top chimney qualified discharge.
3, SO is absorbed2Rich solution be discharged by bottom of tower, with the lean solution after regeneration after poor rich liquid heat exchanger exchanges heat, by tower top into
Enter desorber, desorption and regeneration, bottom of tower obtains lean solution, and tower top obtains high-purity sulfur dioxide gas.
4, the absorbent (lean solution) after regenerating returns to absorption tower cycle after poor rich liquid heat exchanger, lean solution cooler cooling to be made
With.
5, the SO desorbed2Saturated vapor enters after condenser, separator condensation separation prepares by-product into acid making system
Object sulfuric acid.
Embodiment 2
Such as Fig. 1：A kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas, including gas purification and
Demister system, SO2It absorbs and demister system, desorption system, ion liquid purification system；The specific method is as follows：
S1. reviver mixed flue gas (melting flue gas, reduction kiln gas, ring collection flue gas, relieving haperacidity tail gas) enters and mixes gas dress
It sets, mixed flue gas enters the cooling of purification and washing combined column and washing by desulfurization wind turbine, enters purification and washing group by bottom of tower
Tower is closed, reduces flue-gas temperature, and remove the SO in flue gas3, acid mist and solid impurity etc., reviver mixed flue gas is again by absorbing
Tower bottom enters SO2Absorption tower；
Above-mentioned acid mist is the acid mist removed by preposition electric demisting in flue gas；
S2. in absorption tower, regeneration lead fume and ionic liquid absorbent counter current contacting, SO2It is absorbed；
S3. in absorption tower, further cooling and dedusting, catalyst dust enter tower to regeneration lead fume with wash cycle liquid
In the liquid pool of bottom, with absorption SO2Rich solution be discharged by bottom of tower, be filtered, remove chalk dust removing；
S4. SO is absorbed2Rich solution be discharged by bottom of tower, exchange heat through poor rich liquid heat exchanger with the lean solution after regeneration after filter
Afterwards, desorber, desorption and regeneration are entered by tower top, bottom of tower obtains lean solution, and tower top obtains high-purity sulfur dioxide gas；
S5. the absorbent (lean solution) after regenerating returns to absorption tower cycle after poor rich liquid heat exchanger, lean solution cooler cooling
It uses；
S6. the SO desorbed2Saturated vapor enters after condenser, separator condensation separation prepares by-product into acid making system
Object sulfuric acid.
Further, above-mentioned absorption tower has the function of dedusting, and the rich solution containing catalyst dust enters after being discharged by bottom of tower
Filter carries out solid-liquor separation, removes chalk dust removing.
Further, above-mentioned absorption tower is spiral-flow plate-type spray column, and one layer of equal cyclone flowing plate, 3-6 layers of spray are furnished in tower
Layer, two layers of demister.
Further, at least one layer of lean solution come from after parsing, at least one layer come from absorption tower bottom.
Further, above-mentioned desorber is the higher packed tower of gas liquid contacting efficiency, and double layer of metal ripple rule are furnished in tower
Whole filler.
Further, above-mentioned ion liquid purification system using freezing and crystallizing add ion exchange resin adsorb by the way of remove from
The thermal-stable salt generated in sub- liquid sweetening process.
Further, cation is binary amine in above-mentioned ionic liquid absorbent, anion is lactic acid or phosphate radical.
Further, above-mentioned absorbing reaction temperature is 35~60 DEG C, and desorption reaction temperature is 110~115 DEG C, and pressure is
Normal pressure.
Further, the afterheat steam of oil plant can be used in above-mentioned desorber heating.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (9)
1. a kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas, it is characterised in that specific method is such as
Under：
S1. regeneration lead ring collection flue gas initially enters the cooling of purification combined column and washing, enters purification combined column by bottom of tower, reduces cigarette
Temperature degree, and remove the SO in flue gas3, acid mist and solid impurity etc., regeneration lead fume enters SO by absorb the bottom of the tower again2It inhales
Receive tower；
S2. in absorption tower, regeneration lead fume and ionic liquid absorbent counter current contacting, SO2It is absorbed；
S3. in absorption tower, further cooling and dedusting, catalyst dust enter tower bottom to regeneration lead fume with wash cycle liquid
In liquid pool, with absorption SO2Rich solution be discharged by bottom of tower, be filtered, remove chalk dust removing；
S4. SO is absorbed2Rich solution be discharged by bottom of tower, after filter with the lean solution after regeneration after poor rich liquid heat exchanger exchanges heat, by
Tower top enters desorber, desorption and regeneration, and bottom of tower obtains lean solution, and tower top obtains high-purity sulfur dioxide gas；
S5. the absorbent after regenerating returns to absorption tower after poor rich liquid heat exchanger, lean solution cooler cooling and recycles；
S6. the SO desorbed2Saturated vapor enters after condenser, separator condensation separation prepares by-product sulphur into acid making system
Acid.
2. a kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas according to claim 1,
It is characterized in that：Acid mist is the acid mist removed by preposition electric demisting in flue gas in above-mentioned steps S1.
3. a kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas according to claim 1,
It is characterized in that：Above-mentioned absorption tower has the function of dedusting, the rich solution containing catalyst dust be discharged by bottom of tower after enter filter into
Row solid-liquor separation, removes chalk dust removing.
4. a kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas according to claim 1,
It is characterized in that：Above-mentioned absorption tower is spiral-flow plate-type spray column, is furnished with one layer of equal cyclone flowing plate in tower, 3-6 layers of spraying layer, is removed for two layers
Day with fog.
5. a kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas according to claim 1,
It is characterized in that：Above-mentioned desorber is the higher packed tower of gas liquid contacting efficiency, and double layer of metal corrugated regular filler is furnished in tower.
6. a kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas according to claim 1,
It is characterized in that：Above-mentioned ion liquid purification system removes ionic liquid desulfurization in such a way that freezing and crystallizing adds ion exchange resin to adsorb
The thermal-stable salt generated in the process.
7. a kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas according to claim 1,
It is characterized in that：Cation is binary amine in above-mentioned ionic liquid absorbent, anion is lactic acid or phosphate radical.
8. a kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas according to claim 1,
It is characterized in that：Above-mentioned absorbing reaction temperature is 35~60 DEG C, and desorption reaction temperature is 110~115 DEG C, and pressure is normal pressure.
9. a kind of method of cyclic absorption secondary lead smelting and ring collection sulfur dioxide in flue gas according to claim 1,
It is characterized in that：The afterheat steam of oil plant can be used in above-mentioned desorber heating.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109078443A (en) * | 2018-09-21 | 2018-12-25 | 宁夏瑞银有色金属科技有限公司 | A kind of exhaust treatment system and its application method for lead-acid accumulator |
| CN109160493A (en) * | 2018-11-07 | 2019-01-08 | 北京矿冶科技集团有限公司 | SO2The boiling reduction of flue gas during smelting two-part prepares the device and its technique of sulphur |
| CN109513329A (en) * | 2018-12-26 | 2019-03-26 | 科洋环境工程（上海）有限公司 | Absorption system and absorption technique containing sulfur dioxide flue gas |
| CN110124510A (en) * | 2019-01-29 | 2019-08-16 | 浙江天能电源材料有限公司 | A method of utilizing oxygen-enriched side-blowing smelting lead extracting sulfuric acid |
| CN112174098A (en) * | 2020-09-29 | 2021-01-05 | 安徽华铂再生资源科技有限公司 | Application method of low-temperature refrigerating unit in low-gas concentrated acid making system |
| CN112933767A (en) * | 2021-02-03 | 2021-06-11 | 吉林吉恩镍业股份有限公司 | Organic amine method blowing ring collection flue gas desulfurization process for nickel smelting |
| CN113082979A (en) * | 2021-04-09 | 2021-07-09 | 聊城市鲁西化工工程设计有限责任公司 | Flue gas desulfurization and dust removal integrated device, process and application |
| CN113599971A (en) * | 2021-07-06 | 2021-11-05 | 金川集团股份有限公司镍冶炼厂 | Device and process method for saving energy and reducing consumption in tail gas treatment |
| CN113788459A (en) * | 2021-10-15 | 2021-12-14 | 济源市万洋冶炼(集团)有限公司 | Method for directly preparing refined sulfuric acid by using secondary lead smelting flue gas |
| CN114887467A (en) * | 2022-05-26 | 2022-08-12 | 苏州璞赛环境科技有限公司 | Gas-phase sulfur dioxide tail gas treatment system and treatment method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109078443A (en) * | 2018-09-21 | 2018-12-25 | 宁夏瑞银有色金属科技有限公司 | A kind of exhaust treatment system and its application method for lead-acid accumulator |
| CN109160493A (en) * | 2018-11-07 | 2019-01-08 | 北京矿冶科技集团有限公司 | SO2The boiling reduction of flue gas during smelting two-part prepares the device and its technique of sulphur |
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| CN110124510A (en) * | 2019-01-29 | 2019-08-16 | 浙江天能电源材料有限公司 | A method of utilizing oxygen-enriched side-blowing smelting lead extracting sulfuric acid |
| CN112174098B (en) * | 2020-09-29 | 2022-05-03 | 安徽华铂再生资源科技有限公司 | Application method of low-temperature refrigerating unit in low-gas concentrated acid making system |
| CN112174098A (en) * | 2020-09-29 | 2021-01-05 | 安徽华铂再生资源科技有限公司 | Application method of low-temperature refrigerating unit in low-gas concentrated acid making system |
| CN112933767A (en) * | 2021-02-03 | 2021-06-11 | 吉林吉恩镍业股份有限公司 | Organic amine method blowing ring collection flue gas desulfurization process for nickel smelting |
| CN113082979A (en) * | 2021-04-09 | 2021-07-09 | 聊城市鲁西化工工程设计有限责任公司 | Flue gas desulfurization and dust removal integrated device, process and application |
| CN113599971A (en) * | 2021-07-06 | 2021-11-05 | 金川集团股份有限公司镍冶炼厂 | Device and process method for saving energy and reducing consumption in tail gas treatment |
| CN113788459A (en) * | 2021-10-15 | 2021-12-14 | 济源市万洋冶炼(集团)有限公司 | Method for directly preparing refined sulfuric acid by using secondary lead smelting flue gas |
| CN114887467A (en) * | 2022-05-26 | 2022-08-12 | 苏州璞赛环境科技有限公司 | Gas-phase sulfur dioxide tail gas treatment system and treatment method |
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