CN201454402U - Wet flue gas desulfurization device by taking sodium alkali as desulfurizer - Google Patents
Wet flue gas desulfurization device by taking sodium alkali as desulfurizer Download PDFInfo
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- CN201454402U CN201454402U CN2009201037671U CN200920103767U CN201454402U CN 201454402 U CN201454402 U CN 201454402U CN 2009201037671 U CN2009201037671 U CN 2009201037671U CN 200920103767 U CN200920103767 U CN 200920103767U CN 201454402 U CN201454402 U CN 201454402U
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- flue gas
- absorption tower
- carrier pipe
- desulfurization
- pump
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Abstract
The utility model relates to a device by using sodium alkali to carry out flue gas desulfurization, in particular to a wet flue gas desulfurization device which takes sodium alkali as desulfurizers; the device solves the problems that the existing desulfurization technology has high construction cost, high energy consumption and high operation difficulty; the wet flue gas desulfurization device comprises a flue gas system which is composed of a lower boiler flue gas delivery pipe, an upper boiler flue gas delivery pipe and a chimney, a desulfurization adsorption system formed by an absorption tower and a circulating pump, a desulfurizer preparation system formed by an alkali liquid tank and a delivery pipe, a by-product recovery system formed by a buffer slot, a filtrate receiver and a flat basket filter-pressing mechanism, and the corresponding electrical-control system; the device has non-volatile desulfurizer, less solvent loss, high sodium alkali solubility, and no problems of scaling and blocking of an adsorption system; the resource is saved and the labor intensity is low.
Description
Technical field
The utility model relate to a kind of with soda to flue gas desulfur device, being specially a kind of is the wet flue gas desulfurizer that carries out of desulfurizing agent with the soda.
Background technology
At present wet process of FGD mainly is to be that raw material carries out flue gas desulfurization with lime, ammoniacal liquor, magnesia or other alkali sources, through the alkali lye preparation with carry, carries out desulphurization reaction then.
According to the renovation process difference of desulfurization absorption liquid, gained byproduct and desulfurization end product difference, and produce different sodium alkali desulfurization methods.Mainly contain at present: Arbiso process, sodium sulfite round-robin method and sodium salt-acid decomposition etc.Arbiso process is machined directly to product by absorption liquid.The sodium sulfite round-robin method adopts thermal regeneration, and absorbent can be recycled.Sodium salt-acid decomposition is the sour resolution process of absorption liquid.
The weak point of above the whole bag of tricks mainly is: (1) major technique needs the expensive patent fee of payment by the control of external large desulfurization company, causes the construction costs height.(2) industrial practice is few, and pluses and minuses expose insufficient.(3) the sodium sulfite round-robin method adopts thermal regeneration, and construction investment is big, the energy consumption height.(4) operation easier is big.
Summary of the invention
The utility model is the construction costs height that exists in the existing flue gas desulfurization technique in order to solve, energy consumption height, problem such as operation easier is big and to provide a kind of be the wet flue gas desulfurizer that carries out of desulfurizing agent with the soda.
Utility model is realized that by following technical scheme a kind of is the wet flue gas desulfurizer that carries out of desulfurizing agent with the soda, comprises the absorption tower, is precooling zone, spraying layer, demister from top to bottom in the absorption tower, also is connected with circulation pipe and circulating pump outside the absorption tower; The lower inlet on absorption tower is connected with down the boiler smoke carrier pipe, and the upper outlet on absorption tower is connected with the boiler smoke carrier pipe, also connects chimney on the last boiler smoke carrier pipe; The bottom on absorption tower is connected with dashpot by slush pump, and dashpot is leaded up to slag stock pump connecting plate basket filter press, and another road of dashpot connects filtrate receiver; Also comprise alkali liquid tank, alkali liquid tank by having lye pump carrier pipe and the lower inlet on absorption tower be communicated with, filtrate receiver is connected with carrier pipe by filtrate pump.
Compared with prior art, the utility model comprises by following boiler smoke carrier pipe, the by-product recovery system that the desulfurizing agent preparation system that the desulfurizing adsorption system that the flue gas system that last boiler smoke carrier pipe and chimney constitute, absorption tower and circulating pump constitute, alkali liquid tank and carrier pipe constitute, dashpot, filtrate receiver, plate basket filter press constitute, and composition partly such as corresponding electric-control system.
The utlity model has following advantage in a word; (1) desulfurizing agent is non-volatile, and solvent loss is few; (2) soda solubility height, absorption system does not exist fouling, blockage problem; (3) absorbability is big, and doctor solution consumption is few; (4) the outer discharge capacity of desulphurization system waste water is little, economizes on resources; (5) plant automation degree height reduces labor strength, reduces staffing.
Description of drawings
Fig. 1 is an arrangement schematic diagram of the present utility model
Among the figure: boiler smoke carrier pipe, 3-absorption tower, 4-circulating pump, 5-circulation pipe, 6-slush pump, 7-filtrate pump, 8-filtrate receiver, 9-dashpot, 10-slag stock pump, 11-alkali liquid tank, 12-lye pump, 13-plate basket filter press, 14-carrier pipe under the last boiler smoke carrier pipe of 1-, the 2-
The specific embodiment
As schematically shown in Figure 1, a kind of is the wet flue gas desulfurizer that carries out of desulfurizing agent with the soda, comprises absorption tower 3, is precooling zone, spraying layer, demister from top to bottom in the absorption tower 3, also is connected with circulation pipe 5 and circulating pump 4 (having three groups) outside the absorption tower; The lower inlet on absorption tower 3 is connected with down boiler smoke carrier pipe 2, and the upper outlet on absorption tower 3 is connected with boiler smoke carrier pipe 1, also connects chimney on the last boiler smoke carrier pipe 1; The bottom on absorption tower 3 is connected with dashpot 9 by slush pump 6, and dashpot 9 is leaded up to slag stock pump 10 connecting plate basket filter presses 13, and dashpot 9 another roads connect filtrate receivers 8; Also comprise alkali liquid tank 11, alkali liquid tank 11 by having lye pump 12 carrier pipe 14 and the lower inlet on absorption tower 3 be communicated with, filtrate receiver 8 is connected with carrier pipe 14 by filtrate pump 7.
As schematically shown in Figure 1, two-way is divided in boiler induced-draft fan outlet back, and one road flue gas directly drains into chimney through last boiler smoke carrier pipe 1.Arrange 1 baffle ventilation door on this flue.Another road enters the precooling zone on absorption tower 3 by descending boiler smoke carrier pipe 2, arranges an import baffle ventilation door before the precooling zone.The absorption tower outlet is provided with an outlet plate washer air door in addition.
Arrange a plurality of 10G nozzles in the precooling zone, spray is reduced to the cigarette temperature about about 85-95 ℃ by 130～150 ℃ with industry water.The flue gas of cooling evenly upwards flows after entering the absorption tower, react the effect that reaches desulfurization through the sodium hydroxide solution under spraying layer and the reverse flow then, the demister of arranging above desulfurizing tower makes outlet flue gas water content :≤75mg/Nm in order to remove the droplet in the flue gas
3(dry state), last flue gas enters atmosphere through chimney.
The absorption tower import is provided with expansion joint, and the expansion joint of wet flue gas section is established drainage arrangement; All should adopt releasable connection convenient between expansion joint and the flue with installation and maintenance.
In order to make exhaust gas temperature reach 78 ℃ requirement, draw one road high temperature air in the boiler air preheater outlet and mix with desulfurizing tower outlet flue gas, can better eliminate white cigarette phenomenon in the winter time like this.
Flue gas is entered in the tower by the desulfurizing tower middle and lower part, flows from bottom to top in tower, and desulfurization slurry sprays down from the high-efficiency desulfurization nozzle, alkali lye after the atomizing and the SO in the flue gas
2Fully contact and react.
As follows in this stage main chemical reactions:
2NaOH+SO
2→Na
2SO
3+H
2O
Na
2SO
3+SO
2+H
2O→NaHSO
3
Product after the doctor solution desulfurization is all water-soluble easily, can not produce phenomenons such as precipitation, fouling, obstruction.For the alkali lye that makes the desulfurizing tower bottom mixes, agitator is set in the desulfurizing tower bottom.Before discharging desulfurizing tower, the boiler smoke behind the spray washing removes the fine droplets of being with through demister.Flooding nozzle is equipped with in the demister bottom, and the self-timing flushing to rinse out moisture film and the dust that is attached on the demist corrugated plating in good time, reaches the desirable fog effect that removes.
Solution after the desulfurization earlier with 7 dozens of slurries excavationg pumps to dashpot 9, desulfurization slurry leaves standstill in dashpot 9, post precipitation, because sodium sulfite solubility is less, be slightly soluble in water, solution top contains the overflow of sodium sulfite doctor solution to filtrate receiver 8 in dashpot 9, through after the air oxidation, be delivered to diaphragm type plate and frame filter press 13 with slag stock pump 10 through the solution bottom after the overflow, the filter cake after pressure filtration main component is the waste residue that contains dust, heavy metallic salt, sodium sulphate.Waste residue is delivered to that coal cinder yard focuses on or is sold as thick sodium sulphate.Filtrate after the squeezing is delivered to filtrate receiver from flowing to geosyncline after the self priming pump pressurization.Solution is done choline and flue gas cooling use in the filtrate receiver.Solution so circulates.
Control system can adopt FPGA control (PLC) system, and leave and the interface of the full DCS of factory communication is monitored, main control loop has: the desulfurizing agent delivery pump is controlled automatically, desulfurizing tower is controlled rate of water make-up automatically, flue-gas temperature on-line monitoring and control, demister flushing control, flue internal pressure and temperature survey, smoke on-line monitoring system (CEMS) automatically. and operating personnel can realize the whole monitoring to whole device and subsystem thereof in central control room.
Claims (1)
1. one kind is the wet flue gas desulfurizer that carries out of desulfurizing agent with the soda, it is characterized in that: comprising absorption tower (3), is precooling zone, spraying layer, demister from top to bottom in absorption tower (3), also is connected with circulation pipe (5) and circulating pump (4) outside the absorption tower; The lower inlet on absorption tower (3) is connected with down boiler smoke carrier pipe (2), and the upper outlet of absorption tower (3) is connected with boiler smoke carrier pipe (1), also connects chimney on the last boiler smoke carrier pipe (1); The bottom on absorption tower (3) is connected with dashpot (9) by slush pump (6), and dashpot (9) is leaded up to slag stock pump (10) connecting plate basket filter press (13), and another road of dashpot (9) connects filtrate receiver (8); Also comprise alkali liquid tank (11), alkali liquid tank (11) by having lye pump (12) carrier pipe (14) and the lower inlet of absorption tower (3) be communicated with, filtrate receiver (8) is connected with carrier pipe (14) by filtrate pump (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201037671U CN201454402U (en) | 2009-07-13 | 2009-07-13 | Wet flue gas desulfurization device by taking sodium alkali as desulfurizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201037671U CN201454402U (en) | 2009-07-13 | 2009-07-13 | Wet flue gas desulfurization device by taking sodium alkali as desulfurizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201454402U true CN201454402U (en) | 2010-05-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201037671U Expired - Fee Related CN201454402U (en) | 2009-07-13 | 2009-07-13 | Wet flue gas desulfurization device by taking sodium alkali as desulfurizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201454402U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120128A (en) * | 2011-02-23 | 2011-07-13 | 山西格瑞环保设备有限公司 | Flue gas desulfurization process for small-sized heating or short-running-cycle boiler |
| CN102219274A (en) * | 2011-03-30 | 2011-10-19 | 东南大学 | Evaporation apparatus for wastewater discharged from flue gas desulphurization process |
| CN103316577A (en) * | 2013-05-27 | 2013-09-25 | 中国石化江汉油田分公司盐化工总厂 | Flue gas desulphurization process by using salt mud and purified brine |
| CN103877846A (en) * | 2013-12-13 | 2014-06-25 | 山东国瑞环保产业有限公司 | Desulfurizing and dedusting device and method |
| CN106621724A (en) * | 2017-01-17 | 2017-05-10 | 江苏亿金环保科技有限公司 | Flue gas desulfurization and dust-whitening integrated device |
| CN108404628A (en) * | 2017-02-09 | 2018-08-17 | 河北龙泽科技开发有限公司 | Boiler flue gas desulfurization system |
| CN110180371A (en) * | 2019-05-15 | 2019-08-30 | 浙江浩普环保工程有限公司 | A kind of alkali desulphurization system and its working method |
-
2009
- 2009-07-13 CN CN2009201037671U patent/CN201454402U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120128A (en) * | 2011-02-23 | 2011-07-13 | 山西格瑞环保设备有限公司 | Flue gas desulfurization process for small-sized heating or short-running-cycle boiler |
| CN102219274A (en) * | 2011-03-30 | 2011-10-19 | 东南大学 | Evaporation apparatus for wastewater discharged from flue gas desulphurization process |
| CN102219274B (en) * | 2011-03-30 | 2012-08-22 | 东南大学 | Evaporation apparatus for wastewater discharged from flue gas desulphurization process |
| CN103316577A (en) * | 2013-05-27 | 2013-09-25 | 中国石化江汉油田分公司盐化工总厂 | Flue gas desulphurization process by using salt mud and purified brine |
| CN103316577B (en) * | 2013-05-27 | 2015-12-23 | 中国石化江汉油田分公司盐化工总厂 | Salt slurry-purified brine flue gas desulfurization technique |
| CN103877846A (en) * | 2013-12-13 | 2014-06-25 | 山东国瑞环保产业有限公司 | Desulfurizing and dedusting device and method |
| CN103877846B (en) * | 2013-12-13 | 2016-05-18 | 山东国瑞环保产业有限公司 | Desulfurating dust-removing equipment and method |
| CN106621724A (en) * | 2017-01-17 | 2017-05-10 | 江苏亿金环保科技有限公司 | Flue gas desulfurization and dust-whitening integrated device |
| CN108404628A (en) * | 2017-02-09 | 2018-08-17 | 河北龙泽科技开发有限公司 | Boiler flue gas desulfurization system |
| CN110180371A (en) * | 2019-05-15 | 2019-08-30 | 浙江浩普环保工程有限公司 | A kind of alkali desulphurization system and its working method |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20160713 |