CN202199264U - Device for removing sulfur dioxide in industrial flue gas sintering and recovering gypsum - Google Patents
Device for removing sulfur dioxide in industrial flue gas sintering and recovering gypsum Download PDFInfo
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- CN202199264U CN202199264U CN201120321199XU CN201120321199U CN202199264U CN 202199264 U CN202199264 U CN 202199264U CN 201120321199X U CN201120321199X U CN 201120321199XU CN 201120321199 U CN201120321199 U CN 201120321199U CN 202199264 U CN202199264 U CN 202199264U
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- gypsum
- flue gas
- circulatory pool
- sulfur dioxide
- absorption tower
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Abstract
The utility model discloses a device for removing sulfur dioxide in industrial flue gas sintering and recovering gypsum, which relates to a treatment device of industrial flue gas sintering in the steel industry. The device comprises an absorbing tower, a circulating pool, a lime pulping system, a lime dewatering system and a control system; the absorbing tower comprises a tower body, a spray system, a demister, a gas inlet, a gas outlet and the like; a slurry outlet is arranged at the bottom of the tower body; an aerator is arranged in the circulating pool; a fan is connected on the aerator; a pH value detector and a lime density detector are arranged in the circulating pool; and the pH value detector and the lime density detector are respectively connected with the control system. The device has the advantages that the effect for removing the sulfur dioxide in the flue gas is good, the desulfurization degree is high, the concentration of the sulfur dioxide in purified flue gas is low, sulfur is recycled, part of other contamination, such as dust, HCL, HF, SO3 and the like, in the flue gas is simultaneously removed, secondary pollution is prevented, the equipment structure is simple, the operation is easy and convenient, the investment is small, and the operation cost is low.
Description
Technical field
The utility model relates to the flue gas processing device of steel industry sintering industry, specifically a kind of sintering industry sulfur dioxide in flue gas, recovery gypsum device of removing.
Background technology
At present; China's steel industry flue gas of sintering machine still is in the starting stage, though rare several families steel works sintering machine flue gas is handled through desulfurization, the sulfur method that each factory adopts is different; Also there are problems in the desulfurization operation, such as fluctuation of service, investment is too high, fault rate is high.According to " steel and iron industry pollutant emission standard " (DB37/990-2008) middle II period discharge standard requirement, SO
2Concentration of emission should be less than 200mg/m
3, China steel industry sintering device flue gas SO
2Concentration of emission is generally at 1000mg/m
3More than, even higher.Sintering desulfuration is that steel industry is realized the key that sulfur dioxide pollution reduces discharging, and the situation is tense, and task is urgent.
The sulfur removal technology that the sintered flue gas desulfurization device that has put into operation at present adopts mainly contains recirculating fluidized bed method, ammonia-ammonium sulfate method, dense-phase tower method, limestone-gypsum method etc.; These technologies are in research and development and trial period in China; The practical sulphur removal effect remains further to be verified and assessment.
Summary of the invention
The purpose of the utility model is the deficiency that overcomes prior art; It is good to propose a kind of removal effect to sulfur dioxide in the sintering device flue gas; Desulfurization degree is high, and the gypsum low, that produce of the sulfur dioxide concentration in the flue gas after being purified is recovered removing sulfur dioxide in the sintering device flue gas, reclaiming the gypsum device of utilization.
The technical scheme of the utility model is; A kind of sintering industry sulfur dioxide in flue gas, recovery gypsum device of removing is characterized in that comprising absorption tower, circulatory pool, lime pulping system, gypsum dehydration system and control system, and the absorption tower partly is made up of tower body, spray equipment, demister, gas vent, gas feed etc.; The tower body bottom is provided with the slurries outlet; The slurries outlet connects circulatory pool, and circulatory pool is through the spray equipment on spray pump connection absorption tower, and the circulatory pool bottom connects gypsum dehydration system through the gypsum stock pump; The disengaging liquor box of gypsum dehydration system links to each other with circulatory pool through the liquid pump; The lime pulping system links to each other with circulatory pool through quantitative adder, is provided with aerator in the circulatory pool, is connected with air blast on the aerator; Be provided with pH value detector and gypsum density detector in the circulatory pool, the pH value detector is connected with the control system respectively with the gypsum density detector.
Be provided with flusher in the utility model in the absorption tower, flusher connects clear water reserviors through clarified water pump.
Be provided with anticorrosion numb stone lining layer in the utility model in the tower body on absorption tower.
The beneficial effect of the utility model is that use the utility model is handled the flue gas of steel industry sintering industry, and is good to the removal effect of sulfur dioxide in flue gas; Desulfurization degree is high, and it is low to purify back sulfur in smoke concentration, and sulphur is recovered utilization; And removed other pollutants of part in the flue gas simultaneously, like dust, HCl; HF, SO
3Deng, prevented secondary pollution, device structure is simple, easy and simple to handle, invest little, operating cost is low.Thoroughly solve the sinter fume pollution problem.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model, also is the sketch map of a kind of embodiment.
The specific embodiment
A kind of sintering industry sulfur dioxide in flue gas, recovery gypsum device of removing as shown in the figure; Comprise absorption tower, circulatory pool 4, lime pulping system 1, gypsum dehydration system 13 and control system 6, the absorption tower partly is made up of tower body 14, spray equipment 10, demister 9, gas vent 8, gas feed 16 etc., and tower body 14 bottoms are provided with the slurries outlet; The slurries outlet connects circulatory pool 4 by the road; Slurries flow in the circulatory pool 4 by the road naturally, and circulatory pool is through the spray equipment 10 on spray pump 7 connection absorption towers, and the circulatory pool bottom connects gypsum dehydration system 13 through gypsum stock pump 12; The disengaging liquor box of gypsum dehydration system links to each other with circulatory pool 4 through liquid pump 11; Lime pulping system 1 links to each other with circulatory pool 4 through quantitative adder 3, is provided with aerator 5 in the circulatory pool, is connected with air blast 2 on the aerator 5; Be provided with pH value detector and gypsum density detector in the circulatory pool, the pH value detector is connected with control system 6 respectively with the gypsum density detector.Be provided with flusher 15 in the absorption tower, flusher 15 connects clear water reserviors 17 through clarified water pump 18, and flusher can clean demister and spray equipment pipeline.Be provided with anticorrosion numb stone lining layer in the tower body on absorption tower, advantage such as have less scaling, easy to clean, the high temperature of anti-burst scaling loss, construction is simple, cost is low.
During use, at first in circulatory pool, add a certain amount of lime solution, under the conveying of spray pump, lime solution is squeezed in the spray equipment on top, absorption tower.Containing sulfur dioxide flue gas is got into by absorption tower lower gas import; The lime solution atomizing is drenched down by top, and the void tower district of gas-liquid in the middle of tower fully contacts, and sulfur in smoke is converted into calcium sulfite by the lime solution absorption and a spot of gypsum falls into the bottom, absorption tower; Enter circulatory pool by the road; Air blast at the bottom of aerator feeds circulatory pool, becomes gypsum with calcium sulfite oxidation with air, when gypsum slurries density surpasses 1.16-1.20; The gypsum density detector sends signal and gives the control system; The control gypsum stock pump running of control system is delivered to gypsum dehydration system output gypsum with the slurries bottom the circulatory pool, and the solution that gypsum dehydration system detaches continues to use through liquid pumped back circulatory pool.PH value detector in the circulatory pool detects and sends signal when pH value is lower than setting (7.5) to the control system, and the control system controls quantitative adder operation, in circulatory pool, replenishes lime solution.
Be to adopt said method and equipment to remove the instance of sulfur dioxide in the sinter fume, recovery gypsum below:
Important technological parameters:
Absorption tower ∮ 10000*13000, absorption liquid: pH value is 8 lime solution;
The flue gas flow of handling: 40 * 10
4m
3/ h (operating mode), SO 2 from fume content: 970mg/Nm
3
Lime solution spray flux: 1200 ~ 1500m
3/ h;
Result of the test:
Absorb back sulfur dioxide in flue gas content 50-120 mg/Nm
3, reaching environmental requirement, a day recovery concentrates 26.4 tons in gypsum.Along with the raising of pH value, the outlet content of sulfur dioxide still can reduce.
Use said apparatus to remove the sulfur dioxide that reclaims in the sinter fume, desulfurization degree is high, removal effect is good, and it is low to purify back sulfur in smoke concentration; The gypsum that produces is recovered utilization, has not only realized reducing discharging reducing and has polluted, and has reclaimed gypsum again and has reduced production cost; Not only removed sulfur dioxide, and removed other pollutants of part in the flue gas simultaneously, like dust; HCl, HF, SO
3Deng, belong to the green desulfur technology that cleans.Present technique adopts equipment such as absorption tower and the gypsum dehydration of mature and reliable, and is simple in structure, easy and simple to handle, invest little, operating cost is low, effective, should in the sintering flue gas desulfurization engineering, apply.
Claims (3)
1. one kind removes sintering industry sulfur dioxide in flue gas, recovery gypsum device, it is characterized in that comprising absorption tower, circulatory pool, lime pulping system, gypsum dehydration system and control system, and the absorption tower partly is made up of tower body, spray equipment, demister, gas vent, gas feed etc.; The tower body bottom is provided with the slurries outlet; The slurries outlet connects circulatory pool, and circulatory pool is through the spray equipment on spray pump connection absorption tower, and the circulatory pool bottom connects gypsum dehydration system through the gypsum stock pump; The disengaging liquor box of gypsum dehydration system links to each other with circulatory pool through the liquid pump; The lime pulping system links to each other with circulatory pool through quantitative adder, is provided with aerator in the circulatory pool, is connected with air blast on the aerator; Be provided with pH value detector and gypsum density detector in the circulatory pool, the pH value detector is connected with the control system respectively with the gypsum density detector.
2. sintering industry sulfur dioxide in flue gas, the recovery gypsum device of removing according to claim 1 is characterized in that being provided with flusher in the absorption tower, and flusher connects clear water reserviors through clarified water pump.
3. according to claim 1 and 2ly remove sintering industry sulfur dioxide in flue gas, reclaim the gypsum device, it is characterized in that being provided with anticorrosion numb stone lining layer in the tower body on absorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120321199XU CN202199264U (en) | 2011-08-30 | 2011-08-30 | Device for removing sulfur dioxide in industrial flue gas sintering and recovering gypsum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120321199XU CN202199264U (en) | 2011-08-30 | 2011-08-30 | Device for removing sulfur dioxide in industrial flue gas sintering and recovering gypsum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202199264U true CN202199264U (en) | 2012-04-25 |
Family
ID=45963402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120321199XU Expired - Fee Related CN202199264U (en) | 2011-08-30 | 2011-08-30 | Device for removing sulfur dioxide in industrial flue gas sintering and recovering gypsum |
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| Country | Link |
|---|---|
| CN (1) | CN202199264U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102949923A (en) * | 2011-08-30 | 2013-03-06 | 威海鑫山集团有限公司 | Method and device for removing sulfur dioxide in industrially-sintered flue gas and recovering gypsum |
-
2011
- 2011-08-30 CN CN201120321199XU patent/CN202199264U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102949923A (en) * | 2011-08-30 | 2013-03-06 | 威海鑫山集团有限公司 | Method and device for removing sulfur dioxide in industrially-sintered flue gas and recovering gypsum |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20140830 |
|
| EXPY | Termination of patent right or utility model |