CN101940870B - Device for removing sulfur dioxide in flue gas - Google Patents
Device for removing sulfur dioxide in flue gas Download PDFInfo
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- CN101940870B CN101940870B CN2010102905787A CN201010290578A CN101940870B CN 101940870 B CN101940870 B CN 101940870B CN 2010102905787 A CN2010102905787 A CN 2010102905787A CN 201010290578 A CN201010290578 A CN 201010290578A CN 101940870 B CN101940870 B CN 101940870B
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- absorption liquid
- desulfurizing tower
- spray equipment
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Abstract
The invention relates to a device for removing sulfur dioxide in flue gas, which comprises a desulfurizing tower (1) as well as an ammonium sulfite-oxidizing unit (6), a defogging mechanism, a purified gas-exhausting outlet (13) and a desulfurizing unit which are arranged at the lower part of the cavity of the desulfurizing tower (1). The device is characterized in that the cavity of the desulfurizing tower (1) is divided into a front cavity (14) and a back cavity(15) in the vertical direction by a barrier (8), the front cavity (14) is provided with a concentration region (A) of a concentration unit and a desulfurizing region (B), and an absorption liquid atomizing unit (5) is arranged in the flue gas inlet (12) of the desulfurizing tower (1). Compared with the prior art, the invention has the advantages of simple process flow and low equipment investment. By arranging the absorption liquid atomizing unit at the flue gas inlet, the device can firstly remove part of SO2, can concentrate sulphate solution by using the heat of flue gas containing sulfur dioxide and can eliminate damages to equipment caused by subsidiary reactions due to high temperature in the flue gas containing sulfur dioxide. By using the device, the removal rates of harmful gas components in waste gas are as follows: no less than 95% for SO2, no less than 99% for SO3, 10-30% for NOx, and no less than 99% for HF; and the dust removal rate is no less than 90%.
Description
Technical field
The present invention relates to a kind of device technique field that removes sulfur dioxide in flue gas and producing ammonium sulfate byproduct.
Background technology
Usually in discharging tail gas such as refining miner industry, sulfuric acid industry or fire coal, oil burning boiler, all contain SO
2Gas.Even the SO of trace
2Content because discharge capacity is huge, also can do great damage to environment and ecology.It is reported, China become continue America, Europe after receive acid rain to endanger serious area the most, the sheet forest, soil ruined.China explicitly calls for, and newly going up power plant must supporting flue gas desulphurization unit, and the power plant that requires existing discharging to exceed standard must install the desulfurization facility before the end of the year 2010, wherein goes into operation more than 20 years or installed capacity below 100,000 kilowatts, time limit transformation or close down.Meanwhile, stipulate 1 kilogram of SO of every discharging
2Charge 0.63 yuan, the management of environmental protection special fund is directly included in this charge in, is used to curb environmental pollution.In order to encourage enterprise to reduce discharging, to put into effect electrovalence policy in June, 2006 and represent, the every kilowatt hour of newly-built and existing desulfurization unit rate for incorporation into the power network all improves 0.015 yuan.From the state macro-control policy, the supporting exhuast gas desulfurization facility of relevant enterprise is imperative.
Conventional art is that dust arrester is set before desulfurizing tower, the waste gas after the flue dust dedusting in the waste gas is got into desulfurizing tower remove SO
2Also there are some technology that ammonium sulfite warp workshop section is later handled as byproduct; What have is provided with oxidation panel outside Ta Nei or tower, be ammonium sulfate with sulfite oxidation, and ammonium sulfate is as byproduct; This design shortcoming is that technology is complicated; Equipment investment is big, installing engineering is many, and can not utilize the heat in the sulfur dioxide flue gas to improve rate of energy well, so its structure is still waiting to improve.
Summary of the invention
Technical problem to be solved by this invention is to above-mentioned prior art present situation a kind of device that removes sulfur dioxide in flue gas to be provided; This device not only designs ingenious; And the flue gas heat that can utilize sulfur dioxide is come the concentrated vitriol salting liquid; Simultaneously can eliminate the side reaction that high temperature caused in the sulfur dioxide flue gas again, and cause damage, improve service life of equipment equipment.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: originally remove the device of sulfur dioxide in flue gas, include desulfurizing tower, be arranged at the oxidation unit of desulfurizing tower inner chamber bottom ammonium sulfite, be provided with demist mechanism being positioned at desulfurizing tower inner chamber top; The outlet of Purge gas emptying, desulfurizer is characterized in that: said desulfurizing tower inner chamber vertically is divided into ante-chamber and back cavity two parts through dividing plate; Be provided with enrichment region, the desulfurization zone of enrichment facility at ante-chamber; In the smoke air inlet of desulfurizing tower, be provided with the absorption liquid atomising device, said smoke air inlet and enrichment region intracavity inter-connection, said oxidation unit is positioned at the bottom of enrichment region inner chamber; Top at enrichment region is provided with escape pipe; This escape pipe and desulfurization zone intracavity inter-connection, said desulfurizer is arranged at desulfurization zone top, and said demist mechanism is positioned at the top of desulfurizer; Be provided with the passage that is connected with back cavity at the top of demist mechanism; The bottom of back cavity is for absorbing the liquid zone, and the outlet of said Purge gas emptying is positioned at the side locations of back cavity middle part or bottom, and the bottom that absorbs the liquid zone is connected with the desulfurization zone intracavity bottom.
As improvement; Said enrichment region can comprise circulating pump and spray equipment; Spray equipment is arranged at the top of enrichment region inner chamber, and spray equipment leads up to pipeline and be connected through the sulfate liquor of circulating pump with the enrichment region intracavity bottom, and another road directly is connected with absorption liquid.
Improve, said desulfurizer includes if this absorption liquid spray equipment of absorption liquid spray equipment is connected with absorption liquid in the absorption liquid zone through the absorption liquid circulating pump through pipeline again.
Improve, be provided with liquid re-distributor under the said absorption liquid spray equipment, liquid re-distributor is with on the madial wall that is horizontally set at ante-chamber and dividing plate.
Improve again; Said demist mechanism comprises demister and cleaning fluid spray equipment; Said demister is positioned on the madial wall of absorption liquid spray equipment top ante-chamber and dividing plate, and said cleaning fluid spray equipment is installed on the top of demister, and the cleaning fluid spray equipment is connected with cleaning fluid through pipeline.
Improve, said oxidation unit comprises air-blaster and air nozzle again, and this air-blaster gas outlet is connected with the air nozzle that is arranged at the enrichment region intracavity bottom, and the air inlet of air-blaster is connected with ambient atmosphere.
Improve again, said concentrated liquid zone inner chamber be provided with can with the communicating pipe of desulfurization zone intracavity inter-connection.
Compared with prior art, the present invention adopts the desulfurizing tower inner chamber vertically to be divided into ante-chamber and back cavity two parts through dividing plate, is provided with enrichment region, the desulfurization zone of enrichment facility at ante-chamber, in the smoke air inlet of desulfurizing tower, is provided with the absorption liquid atomising device.The advantage of this structure is to simplify technological process, reduces equipment investment, and is provided with the absorption liquid atomising device at smoke air inlet, can at first remove a part of SO
2, and can utilize the flue gas heat of sulfur dioxide to come the concentrated vitriol salting liquid, the side reaction that high temperature caused that can eliminate in the sulfur dioxide flue gas again causes the damage to equipment, improves the service life of equipment.Pernicious gas composition removal efficiency in the design's the device waste gas can reach respectively: SO
2>=95%, SO
3>=99%, NOx=10～30%, HF>=99%, dust removal efficiency>=90%.So be a kind of very practical device, be worthy of popularization.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1; The device that removes sulfur dioxide in flue gas of present embodiment includes desulfurizing tower 1, is arranged at the oxidation unit 6 of desulfurizing tower 1 inner chamber bottom ammonium sulfite, is provided with demist mechanism being positioned at desulfurizing tower 1 inner chamber top; The outlet 13 of Purge gas emptying, desulfurizer.Desulfurizing tower 1 inner chamber vertically is divided into ante-chamber 14 and back cavity 15 two parts through dividing plate 8, is provided with enrichment region A, the desulfurization zone B of enrichment facility at ante-chamber 14, in the smoke air inlet 12 of desulfurizing tower 1, is provided with absorption liquid atomising device 5.Smoke air inlet 12 and enrichment region A intracavity inter-connection, said oxidation unit 6 is positioned at the bottom of enrichment region A inner chamber, is provided with escape pipe 7 at the top of enrichment region A, this escape pipe 7 and desulfurization zone B intracavity inter-connection.Desulfurizer is arranged at desulfurization zone top, and this desulfurizer includes if absorption liquid spray equipment 3 these absorption liquid spray equipments 3 are connected with absorption liquid among the absorption liquid zone D through absorption liquid circulating pump 30 through pipeline.And said demist mechanism is positioned at the top of desulfurizer; Be provided with the passage 11 that is connected with back cavity at the top of demist mechanism; The bottom of back cavity 15 is for absorbing liquid zone D; The outlet 13 of said Purge gas emptying is positioned at the side locations of back cavity 15 middle parts or bottom, and the bottom that absorbs liquid zone D is connected with desulfurization zone B intracavity bottom.Above-mentioned enrichment region A comprises circulating pump 43 and spray equipment 4; Spray equipment 4 is arranged at the top of enrichment region A inner chamber; And spray equipment 4 one tunnel 42 is connected through the sulfate liquor of circulating pump 43 with enrichment region A intracavity bottom through pipeline, and another road 41 directly is connected with absorption liquid.Be provided with liquid re-distributor 31 under the above-mentioned absorption liquid spray equipment 3, liquid re-distributor 31 is with on the madial wall that is horizontally set at ante-chamber 14 and dividing plate 8.Above-mentioned demist mechanism comprises demister 2 and cleaning fluid spray equipment 21; Said demister 2 is positioned on the madial wall of absorption liquid spray equipment 3 top ante-chambers 14 and dividing plate 8; Said cleaning fluid spray equipment 21 is installed on the top of demister 2, and cleaning fluid spray equipment 21 is connected with cleaning fluid through pipeline.Above-mentioned oxidation unit comprises air-blaster 61 and air nozzle 62, and these air-blaster 61 gas outlets are connected with the air nozzle 62 that is arranged at enrichment region A intracavity bottom, and the air inlet of air-blaster 61 is connected with ambient atmosphere.Above-mentioned concentrated liquid zone A inner chamber be provided with can with the communicating pipe 9 of desulfurization zone B intracavity inter-connection.Above-mentioned demister 2 is to be used for desulphurization plant desulphurization plant commonly used.Above-mentioned absorption liquid is ammoniacal liquor or dilute sulfuric acid salt or sulfite solution.
Below in conjunction with the present invention is done further explain.
1, contains SO
2Industrial smoke establish ammoniacal liquor (absorption liquid) atomising device at desulfurizing tower gas approach place, with ammoniacal liquor with remove sulfur in smoke reaction, produce ammonium sulfite.
2, flue gas gets into the desulfurizing tower enriching section, and flue gas and concentrate counter current contacting reduce flue-gas temperature herein, concentrated simultaneously circulation fluid be evaporated carry dense.Concentrate circulation fluid and contact concentrated liquid zone, entering desulfurizing tower bottom, back with flue gas, after the concentrating pump supercharging, part goes the desulfurizing tower enriching section to contact with flue gas again; Part is when concentrate reaches finite concentration; Send ammonium sulfate cyclone (containing the stiff device), liquid is carried and is sent filter again after dense, and filtrating is returned concentration systems; Filter residue is a water content less than 10% ammonium sulfate (can make the raw material of composite fertilizer), produces the ammonium sulfate that meets GB through drying equipment again.
3, the flue gas that goes out behind the enrichment region gets into desulfurization zone through riser, with through absorption liquid spray equipment spray and under the absorption liquid counter current contacting, SO
2Gas is absorbed.At desulfurization zone the several layers liquid re-distributor is set, plays even distribution absorption liquid, improve the effect of assimilation effect.Liquid is through the absorption liquid zone of down-comer entering desulfurizing tower bottom after the absorbing sulfur dioxide, and liquid gets into the absorption liquid spray equipment again after the desulfuration recycle pump supercharging.
4, the flue gas that goes out desulfurization zone is turned back through dividing plate top UNICOM zone and is got into the Disengagement zone downwards, accomplishes purified gas after the gas-liquid separation and goes out tower in the bottom, Disengagement zone and go smoke stack emission.
5, at the desulfurization cat head demister is set, droplets entrained in the reclaiming clean gas, the gas after the foam removal directly discharges or goes back workshop section.Water Flushing nozzle, absorption liquid spray equipment, liquid distribution trough are set respectively below demister, are used for washing the distribution again of the gas ammonia and the absorption liquid of silk screen, absorbing waste gas, prevent the gas-liquid bias current.
6, blasting air in the concentrated liquid zone of desulfurizing tower becomes ammonium sulfate with sulfite oxidation, and the oxygen that does not react completely gets into desulfurizing tower continuation and flue gas and ammonia gas react and generates ammonium sulfate.
7, the concentrated liquid zone of desulfurizing tower bottom and absorption liquid zone separate; And be provided with communicating pipe in certain height; To guarantee the top cleaning fluid Rational flow of two regional solution, play by absorbing the liquid zone to concentrating liquid zone fluid infusion and the effect that prevents concentrated liquid zone liquid level superelevation.
8, the desulfurizing tower of flue gas is divided into five districts: gas decline Disengagement zone, concentrated liquid zone (liquid phase oxidation district) and absorption liquid zone after enrichment region, desulfurization zone, the purification; Being lower than certain temperature in flue-gas temperature (refers to calculate dew-point temperature according to smoke components; Uniform temperature equals dew-point temperature and adds 10 ℃) time, enrichment region and concentrated liquid zone can not established.
9, in the desulfurizing tower district dividing plate is set, makes flue gas in tower, do earlier upwards downward again motion.Promptly get into of the middle and lower part entering of desulfurizing tower flue gas by enrichment region; Upwards again through riser; Again through desulfurization zone spray equipment and demister device; Turn back and get into Disengagement zone (further separating droplet) downwards in top in tower again, and purified gas goes out tower in the middle and lower part, Disengagement zone and goes smoke stack emission, do not need to be provided with in addition discharging feed channel support.
10, in the riser that gets into desulfurization zone by enrichment region, set up the ammonia spraying device, play further desulfidation.
11, flue gas gets into enrichment region, utilizes flue gas heat to come concentrated vitriol ammonium absorption liquid.
12, at the desulfurizing tower desulfurization zone liquid re-distributor is set, optimizes the gas-liquid contact conditions, improve absorption, reduce SR, improved absorption efficiency.
13, the desulfurizing tower top is provided with demister and catches droplets entrained in the gas, reclaims absorption liquid, reduces the corrosion to back workshop section.The absorption liquid spray equipment is arranged below demister, absorb the ammonia in the flue gas after desulfurization, reduce the ammonia loss.
14, above-mentioned flue gas refers to the gas that all fire coals, fuel oil and various Industrial Stoves (like sintering machine, ceramics furnace) produce.
Claims (4)
1. device that removes sulfur dioxide in flue gas; Include desulfurizing tower (1), be arranged at the oxidation unit (6) of desulfurizing tower (1) inner chamber bottom ammonium sulfite; Be provided with demist mechanism, the outlet of Purge gas emptying (13), desulfurizer being positioned at desulfurizing tower (1) inner chamber top; It is characterized in that: said desulfurizing tower (1) inner chamber vertically is divided into ante-chamber (14) and back cavity (15) two parts through dividing plate (8); Be provided with enrichment region (A), the desulfurization zone (B) of enrichment facility at ante-chamber (14), in the smoke air inlet (12) of desulfurizing tower (1), be provided with absorption liquid atomising device (5), said smoke air inlet (12) and enrichment region (A) intracavity inter-connection; Said oxidation unit (6) is positioned at the bottom of enrichment region (A) inner chamber; Be provided with escape pipe (7) at the top of enrichment region (A), this escape pipe (7) and desulfurization zone (B) intracavity inter-connection, said desulfurizer is arranged at desulfurization zone top; And said demist mechanism is positioned at the top of desulfurizer; Be provided with the passage (11) that is connected with back cavity at the top of demist mechanism, the bottom of back cavity (15) is for absorbing liquid zone (D), and the outlet of said Purge gas emptying (13) is positioned at the side locations of back cavity (15) middle part or bottom; The bottom that absorbs liquid zone (D) is connected with desulfurization zone (B) intracavity bottom; Said enrichment region (A) comprises circulating pump (43) and spray equipment (4), and spray equipment (4) is arranged at the top of enrichment region (A) inner chamber, and spray equipment (4) a tunnel (42) is connected through the sulfate liquor of circulating pump (43) with enrichment region (A) intracavity bottom through pipeline; Another road (41) directly is connected with absorption liquid, and said desulfurizer includes this absorption liquid spray equipment (3) of several absorption liquid spray equipments (3) and is connected with absorption liquid in absorbing liquid zone (D) through absorption liquid circulating pump (30) through pipeline.
2. device according to claim 1 is characterized in that: be provided with liquid re-distributor (31) under the said absorption liquid spray equipment (3), liquid re-distributor (31) is with on the madial wall that is horizontally set at ante-chamber (14) and dividing plate (8).
3. device according to claim 2; It is characterized in that: said demist mechanism comprises demister (2) and cleaning fluid spray equipment (21); Said demister (2) is positioned on the madial wall of absorption liquid spray equipment (3) top ante-chamber (14) and dividing plate (8); Said cleaning fluid spray equipment (21) is installed on the top of demister (2), and cleaning fluid spray equipment (21) is connected with cleaning fluid through pipeline.
4. according to claim 1 or 2 or 3 described devices; It is characterized in that: said oxidation unit comprises air-blaster (61) and air nozzle (62); This air-blaster (61) gas outlet is connected with the air nozzle (62) that is arranged at enrichment region (A) intracavity bottom, and the air inlet of air-blaster (61) is connected with ambient atmosphere.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102905787A CN101940870B (en) | 2010-09-20 | 2010-09-20 | Device for removing sulfur dioxide in flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102905787A CN101940870B (en) | 2010-09-20 | 2010-09-20 | Device for removing sulfur dioxide in flue gas |
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| CN101940870A CN101940870A (en) | 2011-01-12 |
| CN101940870B true CN101940870B (en) | 2012-11-21 |
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| CN2010102905787A Active CN101940870B (en) | 2010-09-20 | 2010-09-20 | Device for removing sulfur dioxide in flue gas |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974210B (en) * | 2012-11-16 | 2014-03-12 | 浙江浙大海元环境科技有限公司 | Built-in double-chamber double-value wet type desulfurizing tower device |
| CN103091461B (en) * | 2013-01-15 | 2015-01-28 | 广东电网公司电力科学研究院 | System and method of mercury re-release characteristic experiment in wet flue gas desulfurization slurry |
| CN103816793B (en) * | 2014-02-20 | 2016-03-23 | 江苏智道工程技术有限公司 | A kind of serial tower activated base ultra high efficiency desulphurization system |
| CN105107340B (en) * | 2015-08-17 | 2017-05-17 | 南京师范大学 | Desulfurization, denitrification and demercuration integration apparatus based on amino absorber and method therefor |
| CN106362568A (en) * | 2016-08-26 | 2017-02-01 | 江苏中圣高科技产业有限公司 | Overturn-type ammonia-process desulfurization device |
| CN108619872B (en) * | 2017-03-24 | 2019-09-10 | 中国石油化工股份有限公司 | A kind of fume desulfurizing tower and flue gas desulfurization and wastewater treatment method |
| CN106823753A (en) * | 2017-03-30 | 2017-06-13 | 贵州诺威施生物工程有限公司 | Desulfurizing tower and desulfurization recovery system |
| CN110465176B (en) * | 2018-05-10 | 2021-10-08 | 中国石油化工股份有限公司 | Flue gas dust removal desulfurization tower and flue gas desulfurization and wastewater treatment method |
| CN110465175B (en) * | 2018-05-10 | 2021-10-08 | 中国石油化工股份有限公司 | Flue gas dust removal desulfurization tower and flue gas dust removal, desulfurization and wastewater treatment method |
| CN110559817B (en) * | 2018-06-05 | 2021-10-08 | 中国石油化工股份有限公司 | Flue gas desulfurization tower and flue gas dedusting, desulfurizing and wastewater treatment process |
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| JP3337380B2 (en) * | 1996-10-17 | 2002-10-21 | 三菱重工業株式会社 | Exhaust gas treatment method |
| DE19731062C2 (en) * | 1997-07-19 | 2001-07-12 | Lurgi Lentjes Bischoff Gmbh | Process for the removal of acid gases from flue gases, in particular from power plant waste gases and waste gases from waste incineration plants |
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| CN101474528A (en) * | 2008-12-31 | 2009-07-08 | 宁波金远东工业科技有限公司 | Device for removing sulfuric dioxide in exhaust gas |
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Application publication date: 20110112 Assignee: ANHUI FAREAST HEAVY MACHINERY CO., LTD. Assignor: Ningbo Yuandong Industry Technology Co., Ltd. Contract record no.: 2014340000094 Denomination of invention: Device for removing sulfur dioxide in flue gas Granted publication date: 20121121 License type: Exclusive License Record date: 20140424 |
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