CN101596401A - Flue gas desulfurization by easy double alkali method technology and device - Google Patents
Flue gas desulfurization by easy double alkali method technology and device Download PDFInfo
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- CN101596401A CN101596401A CNA2009101461752A CN200910146175A CN101596401A CN 101596401 A CN101596401 A CN 101596401A CN A2009101461752 A CNA2009101461752 A CN A2009101461752A CN 200910146175 A CN200910146175 A CN 200910146175A CN 101596401 A CN101596401 A CN 101596401A
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Abstract
A kind of double alkali method flue gas desulfurization technology of the present invention and device are finished lime slurrying, desulfurization regeneration in comprehensive pond, adopt the V-type mode in the still of absorption tower, and the centre is provided with central tube.This technology is a kind of simple and easy double alkali method desulfurizing technology, and it is simple to have system architecture, and one-time investment is little, and floor space is few, and operation moves characteristics easily.
Description
Technical field
The described flue gas desulfurization technique that belongs to of patent of the present invention is a kind of flue gas desulfurization by easy double alkali method technology and device specifically.
Technical background
At present, usually adopt two alkaline process to comprise desulfurizing agent preparation, sulfur dioxide absorption system and the outer regenerative system of tower etc., need configuration lime white liquid pool, regenerated reactor, sedimentation basin and clean solution tank, system is comparatively huge, one-time investment is bigger, floor space is big, and the operation operation is constant, restricts applying of two alkaline process.
Summary of the invention
A kind of flue gas desulfurization by easy double alkali method technology of the present invention and device utilize lime and soda to make desulfurizing agent to absorb SO in the flue gas
2, end product is calcium sulfite and calcium sulfate.Whole desulphurization system comprises devices such as absorption tower, flap demister, absorption spraying layer, absorption tower still, absorbent recirculation pump, lime warehouse, screw(-type) feeder, soda groove, soda pump, comprehensive pond, sedimentation basin, slag stock pump, dewaterer.
The absorption tower hypomere of this process system is the absorption tower still, and still top in absorption tower is a smoke inlet, and the stage casing, absorption tower is SO
2The spray absorber portion, the absorption tower epimere is a flap demist section, allows flue gas to pass through.
Need to enter through the high-temperature flue gas of desulfurization the stage casing absorption spray equipment on absorption tower, flue-gas temperature drops to 45 ℃ ~ 55 ℃, is provided with 1～3 layer of spray equipment at the spray absorber portion, and absorption liquid contacts washing, the SO in the flue gas with flue gas adverse current
2Generate sodium hydrogensulfite with sodium sulfite, NaOH reaction in the absorption liquid, finished SO
2Absorb.The spraying layer epimere is provided with two-stage flap demister and flusher on the absorption tower, can effectively remove the drop that wherein carries during flue gas process demister, and flusher sprays clear water demister is washed, and prevents its fouling obstruction.By discharging from the flue at top, absorption tower after the flap demister than clean flue gas.
The lime warehouse by screw(-type) feeder to the discharging of comprehensive pond, after quick lime and absorption liquid mix slaking, generate sodium sulfite or NaOH with comprehensive pond sodium hydrogensulfite generation regenerative response, the addition of lime is controlled by the absorption liquid pH value, and keeping comprehensive pond PH is 7～11.Soda lye is annotated alkali by the soda measuring pump to absorbing spraying layer, and the addition of soda is controlled by the soda measuring pump, and keeping the absorption liquid Na ion concentration is 0.1～0.6mol/L.
Absorb Tata still absorption liquid and enter spraying layer washing flue gas by absorbent recirculation pump, absorption liquid PH is 5～8 in the control tower, absorption tower still absorption liquid carries out regenerative response by flowing into comprehensive pond and lime slurry certainly, its slurry mixture carries out Separation of Solid and Liquid by delivery pump to sedimentation basin, central tube recycles in the clear liquid inflow absorption tower, and the calcium sulfite that precipitates, calcium sulfate are delivered to dewaterer by the slag stock pump and carry out processed.
Flue gas desulfurization by easy double alkali method technology of the present invention and device are because employing lime slaking slurrying and desulfurization regeneration are integrated, cancelled conventional sedimentation basin clean solution tank afterwards, simplified system architecture, guaranteed that the new liquid of regeneration back desulfurization directly enters the absorption tower and utilizes, the desulfurizing agent service efficiency is provided, the bottom, absorption tower is provided with funnel shaped, effectively prevents the desulfurization slag deposition.
Description of drawings
Fig. 1 is the structural representation of process flow diagram of the present invention and device.
Among the figure: the 1-absorption tower; 2-flap demister; 3-absorbs spraying layer; 4-absorption tower still; The 5-absorbent recirculation pump; The 6-central tube; 7-lime warehouse; The 8-screw(-type) feeder; 9-soda groove; 10-soda measuring pump; The comprehensive pond of 11-; The 12-delivery pump; The 13-sedimentation basin; 14-slag stock pump; The 15-dewaterer.
The specific embodiment
Introduce the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
Simple and easy as shown in Figure 1 double alkali method desulfurizing technology is handled high-temperature flue gas and is entered absorption tower (1), and SO is finished in the washing of the 2 layers of absorption spray equipment in (1) stage casing (3) spray liquid counter current contacting through the absorption tower
2Absorb, flue-gas temperature drops to 45 ℃ ~ 55 ℃ simultaneously, flue gas passes through on the absorption tower (1) epimere two-stage flap demister (2) again can effectively remove the drop that wherein carries, flap demister (2) configuration flusher sprays clear water demister is washed, and treated flue gas is after the flue discharge at top, absorption tower.
Absorb Tata still (4) absorption liquid and be delivered to absorption spraying layer (3) by absorbent recirculation pump (5), absorption liquid PH is 5～7 in the control tower.
Lime warehouse (7) to comprehensive pond (11) discharging, is finished quick lime emulsification and regeneration of absorption solution by screw(-type) feeder (8) in comprehensive pond (11), controlling comprehensive pond pH value by the addition of lime is 9～11.Soda groove (9) soda lye injects to absorbing spraying layer (3) by soda measuring pump (10), controls its addition by soda measuring pump (10), and keeping the absorption liquid Na ion concentration is 0.5mol/L.
Regeneration rear slurry mixture carries out Separation of Solid and Liquid by delivery pump (12) to sedimentation basin (13), central tube (6) recycles in the supernatant inflow absorption tower, and the calcium sulfite that precipitates, calcium sulfate are delivered to dewaterer (15) by slag stock pump (4) and carry out processed.
Claims (3)
1. double alkali method flue gas desulfurization technology and device, it is characterized in that: adopting bottom, absorption tower (1) is absorption tower still (4), central tube (6) is set in the middle of the absorption tower still (4), absorption tower still (4) top is provided with and absorbs spraying layer (3) absorber portion, absorber portion top is provided with flap demister (2), top, absorption tower and exhaust pass UNICOM.Absorption tower still (4), absorbent recirculation pump (5), absorbing spraying layer (3) is connected in series by pipeline, absorption tower still (4), comprehensive pond (11) connects by pipeline, flap demister (2) flusher is connected with the technology water pipe by pipeline, soda groove (9), soda measuring pump (10), absorbing spraying layer (3) is connected in series by pipeline, lime silo (7), screw(-type) feeder (8), comprehensive pond (11) is connected in series by pipeline, comprehensive pond (11), delivery pump (12), sedimentation basin (13), slag stock pump (14), dewaterer (15) is connected in series by pipeline, and sedimentation basin (13) outlet is connected with central tube (6) by pipeline.
2. a kind of pair of alkali flue gas desulfurization technique according to claim 1 and device, it is characterized in that: adopt absorption tower still (4) to adopt V-type, the angle of inclination is that 20～70 ° and centre are provided with central tube (6), and central tube (6) is a circular configuration, and a flow rate of liquid is 0.05～1m in the tube
2/ s.
3. a kind of pair of alkali flue gas desulfurization technique according to claim 1 and device, it is characterized in that: adopt comprehensive pond (11) for circular configuration, in establish agitating device, the liquid reactions time of staying is 5～60min, the slurries pH value is 6～11, finishes lime slurrying and desulfurization regeneration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101461752A CN101596401A (en) | 2009-06-03 | 2009-06-03 | Flue gas desulfurization by easy double alkali method technology and device |
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|---|---|---|---|
| CNA2009101461752A CN101596401A (en) | 2009-06-03 | 2009-06-03 | Flue gas desulfurization by easy double alkali method technology and device |
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| CN101596401A true CN101596401A (en) | 2009-12-09 |
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| CNA2009101461752A Pending CN101596401A (en) | 2009-06-03 | 2009-06-03 | Flue gas desulfurization by easy double alkali method technology and device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101816887A (en) * | 2010-05-07 | 2010-09-01 | 吉林安洁环保有限公司 | High-alkaline double-alkali simplified desulfuration control method by adding agent at front end of canal |
| CN102078761A (en) * | 2010-12-06 | 2011-06-01 | 李鹏举 | Comprehensive flue gas desulfurization, mercury removal and denitration process and device |
| CN108554154A (en) * | 2018-03-14 | 2018-09-21 | 江苏苏菱铝用阳极有限公司 | A kind of prebaked anode removes smoke the method for purge pipe blocking |
| CN109692550A (en) * | 2019-01-25 | 2019-04-30 | 鲍可可 | A kind of circulation sodium method flue gas desulfurization technique |
| CN110237670A (en) * | 2019-06-27 | 2019-09-17 | 成都海成环保工程有限公司 | It is a kind of to use Dual alkali circulation desulfurization system and its sulfur removal technology |
| CN110813056A (en) * | 2019-11-27 | 2020-02-21 | 福建省清流县东莹化工有限公司 | Novel tail gas treatment process |
| CN111974168A (en) * | 2020-08-22 | 2020-11-24 | 泉州市福源保温材料有限公司 | Waste flue gas treatment system |
-
2009
- 2009-06-03 CN CNA2009101461752A patent/CN101596401A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101816887A (en) * | 2010-05-07 | 2010-09-01 | 吉林安洁环保有限公司 | High-alkaline double-alkali simplified desulfuration control method by adding agent at front end of canal |
| CN102078761A (en) * | 2010-12-06 | 2011-06-01 | 李鹏举 | Comprehensive flue gas desulfurization, mercury removal and denitration process and device |
| CN108554154A (en) * | 2018-03-14 | 2018-09-21 | 江苏苏菱铝用阳极有限公司 | A kind of prebaked anode removes smoke the method for purge pipe blocking |
| CN109692550A (en) * | 2019-01-25 | 2019-04-30 | 鲍可可 | A kind of circulation sodium method flue gas desulfurization technique |
| CN110237670A (en) * | 2019-06-27 | 2019-09-17 | 成都海成环保工程有限公司 | It is a kind of to use Dual alkali circulation desulfurization system and its sulfur removal technology |
| CN110237670B (en) * | 2019-06-27 | 2021-06-18 | 成都海成环保工程有限公司 | Circulating desulfurization system adopting double-alkali method and desulfurization process thereof |
| CN110813056A (en) * | 2019-11-27 | 2020-02-21 | 福建省清流县东莹化工有限公司 | Novel tail gas treatment process |
| CN111974168A (en) * | 2020-08-22 | 2020-11-24 | 泉州市福源保温材料有限公司 | Waste flue gas treatment system |
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Open date: 20091209 |