CN106731549A - A kind of effective wet method fume desulfurizing system for eliminating gypsum rain - Google Patents

A kind of effective wet method fume desulfurizing system for eliminating gypsum rain Download PDF

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Publication number
CN106731549A
CN106731549A CN201611251604.9A CN201611251604A CN106731549A CN 106731549 A CN106731549 A CN 106731549A CN 201611251604 A CN201611251604 A CN 201611251604A CN 106731549 A CN106731549 A CN 106731549A
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CN
China
Prior art keywords
demister
gypsum rain
wet
collecting tank
desulfurizing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201611251604.9A
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Chinese (zh)
Inventor
乔宗良
司风琪
姚学忠
包文运
贠勇博
向文虎
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Southeast University
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Southeast University
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Filing date
Publication date
Application filed by Southeast University filed Critical Southeast University
Priority to CN201611251604.9A priority Critical patent/CN106731549A/en
Publication of CN106731549A publication Critical patent/CN106731549A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/40Alkaline earth metal or magnesium compounds
    • B01D2251/404Alkaline earth metal or magnesium compounds of calcium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/60Inorganic bases or salts
    • B01D2251/606Carbonates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The invention discloses it is a kind of it is effective eliminate gypsum rain wet method fume desulfurizing system, including in desulfurizing tower to lower on be provided with reserve pit, spraying layer and demister;Horizontal demister is provided with the smoke outlet of desulfurizing tower, collecting tank is provided with below horizontal demister, collecting tank has the pipeline for leading to defroster cleaning apparatus, and the pipeline and pump for leading to reserve pit bottom.The present invention sets the fog during horizontal demister can remove flue gas in smoke outlet, improve demisting efficiency and reduce the generation of gypsum rain, and transformation is simple, overcome the shortcoming of desulfurizing tower inside transformation insufficient space, during the water that collecting tank is collected can import rinse water in the horizontal demister of cleaning, save water, it is also possible to which slurry pool bottom is directly entered by pipeline.

Description

A kind of effective wet method fume desulfurizing system for eliminating gypsum rain
Technical field
The invention belongs to chemical industry, environmental technology field, and in particular to a kind of effective wet process of FGD for eliminating gypsum rain System.
Background technology
Contain SO in the flue gas of large thermal power plant discharge2, it is directly discharged to that environment can be caused very big pollution in air, Therefore, country all Qiang Zhiyaoqius installation flue gas desulfurization device, desulfurization technology is divided into wet desulphurization and dry desulfurization, and current wet method takes off Sulphur occupies leading position always, and wet desulphurization is will to contain CaCO3Lime stone be fabricated to water smoke, and sprayed in desulfurizing tower and arrive In flue gas, the SO in flue gas2With CaCO in lime stone water smoke3Chemical reaction generation gypsum, here it is whole sweetening process.
In traditional desulfurizing tower sweetening process, during spraying layer spray lime stone water smoke, due to flue gas flow rate generation bigger than normal Entrainment phenomenon, demister is inefficient except fog effect, and a part of small water fog particle is not intercepted by fixed demister, And exhanst gas outlet is brought in by flue gas, cause flue gas to reach exit still containing certain droplet, and be discharged into air, Gypsum rain phenomenon is produced, so as to the living environment to neighbouring resident causes very big influence.
With the appearance of new national Environmental capacity standard, the problem of gypsum rain has been brought into schedule, as power plant's emphasis One of problem of solution is needed, it is international and domestic at present to go back many good gypsum rains solved under heat-engine plant desulfurizers of neither one The method of problem, it has also become each thermal power plant problem urgently to be resolved hurrily.
The content of the invention
Goal of the invention:The drawbacks of in order to overcome prior art and deficiency, the present invention provide a kind of effective elimination gypsum rain Wet method fume desulfurizing system.Increase demisting efficiency using follow-on desulfurizer mist eliminator arrangement and solve gypsum rain and ask Topic.
Technical scheme:In order to solve the above technical problems, the wet flue gas of a kind of effective elimination gypsum rain that the present invention is provided In desulphurization system, including desulfurizing tower to lower on be provided with reserve pit, spraying layer and demister;The demister includes laterally removing Day with fog and longitudinal demister, the horizontal demister are arranged on the smoke outlet of desulfurizing tower, and horizontal demister lower section is provided with collection Liquid pool, pipeline is connected between the collecting tank and defroster cleaning apparatus.
Specifically, longitudinal demister is provided in the two-layer above spraying layer.
Specifically, the horizontal demister is the folded plate type demister of individual layer, and the knuckle of folded plate type demister is 120 °, high 2.3m。
Specifically, valve is installed on the pipeline, collecting tank is passed through pipeline and valve with two-layer longitudinal direction demister Purging system is connected, not during demister is cleaned, valve closing, and when demister is cleaned, valve is opened, and the water that will be accumulated converges Enter in rinse water, demister is cleaned, water energy can be saved, can also reduce pump and water is extracted into the electricity that spraying layer is cleaned Energy.
Specifically, the collecting tank is directly communicated to slurry pool bottom, in flue gas desulfurization course, liquid collecting by second pipe The water of pond accumulation is subject to during certain pressure pours slurry pool by pump, can not only ensure the water level balance of slurry pool, moreover it is possible to increase Plus the flow disturbance inside slurry pool, accelerate the oxidation reaction of slurry pool inside calcium sulfite.
When using, the present invention uses follow-on desulfurizer mist eliminator arrangement, including desulfurizing tower body, and is arranged on Reserve pit below desulfurizing tower body, and the spraying layer in the middle of desulfurizing tower body is arranged on, and it is arranged on desulfurizing tower body top Demister;One horizontal demister is set in smoke outlet, a collecting tank, collecting tank are set below horizontal demister The pipeline for leading to spraying layer top two-layer defroster cleaning apparatus is provided with, collecting tank is provided with the pipeline for leading to reserve pit bottom And pump.Horizontal individual layer demister is set by smoke outlet, the droplet that will effectively can be carried secretly in flue gas catches to be collected, Demisting efficiency is improved, for gypsum rain problem provides a kind of effective solution.
Beneficial effect:The present invention uses follow-on desulfurizer mist eliminator arrangement, is set laterally in smoke outlet Demister can remove the fog in flue gas, improve demisting efficiency and reduce the generation of gypsum rain, and transformation is simple, overcomes de- The shortcoming of sulphur tower inside transformation insufficient space.
Except invention described above solve technical problem, constitute technical scheme technical characteristic and by these skills Outside the advantage that the technical characteristic of art scheme is brought, a kind of effective wet method fume desulfurizing system institute for eliminating gypsum rain of the invention The advantage that the other technical characteristics and these technical characteristics included in other technologies problem, the technical scheme that can solve are brought, To be described in more detail with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is the schematic diagram of the embodiment of the present invention one;
Fig. 2 is the schematic diagram of the embodiment of the present invention two;
Fig. 3 is the schematic diagram of the embodiment of the present invention three;
Fig. 4 is the model of a section foundation of horizontal demister;
Fig. 5 be droplet pass through demister when motion pattern;
Fig. 6 is concentration profile of the droplet inside demister;
In figure:Horizontal demister 1, collecting tank 2, pipeline 3, pump 4.
Specific embodiment
Embodiment one
Follow-on desulfurizer mist eliminator arrangement overall plan of the present embodiment is as shown in figure 1, including desulfurizing tower body, and setting Reserve pit below desulfurizing tower body, and the spraying layer in the middle of desulfurizing tower body is arranged on, and be arranged on desulfurizing tower body The demister of side, the desulfurizing tower sets a horizontal demister 1 in smoke outlet, and one is set below horizontal demister Collecting tank 2, collecting tank is provided with the pipeline 3 for leading to spraying layer top two-layer defroster cleaning apparatus, and collecting tank is provided with and leads to The pipeline and pump 4 of reserve pit bottom.
The course of work of desulfurizing tower is under modified demister arrangement of the invention:Flue gas is with certain speed from flue Entrance enters in desulfurizing tower, is moved upwards along the short transverse of tower, and at the same time, slurry circulating pump is by slurries from slurry pool Spraying layer is extracted into, by nozzle atomization, spray, carries out contact and mix with upstream flue gas downwards, reacts, slurries spray The droplet of pouring is carried secretly and with certain speed by demister by flue gas, removes most of drop by demister, but still have few portion Divide droplet to reach exhaust pass with flue gas, be removed by after the horizontal demister of exhaust pass, final flue gas passes through flue Export to up to air, largely avoid the generation of gypsum rain.The horizontal demister bottom of flue outlet is designed with liquid collecting Pond, for collecting the droplet of demister demisting.
Embodiment two
The present embodiment is the improvement of the processing mode of the liquid of collection in the collecting tank of embodiment one, as shown in Fig. 2 improvements exist The processing mode of the liquid collected in collecting tank, double-deck demister in tower is led to by the water in collecting tank by pipeline and valve In cleaning pipeline, during demister is not at cleaning, valve closing carries out retaining, and when demister is cleaned, valve is beaten Open, the water that will be accumulated is imported in rinse water, and demister is cleaned, and can save water energy, can also reduce pump and water is extracted into spray The electric energy that drenching layer is cleaned.
Embodiment three
The present embodiment is another improvement of the processing mode of the liquid of collection in the collecting tank of embodiment one, as shown in figure 3, will collection Water in liquid pool is directly connected with slurry pool bottom by pipeline and pump, and in flue gas desulfurization course, the water of collecting tank accumulation leads to Cross pump to be subject to during certain pressure pours slurry pool, can not only ensure the water level balance of slurry pool, moreover it is possible to increase inside slurry pool Flow disturbance, accelerate slurry pool inside calcium sulfite oxidation reaction.
Fig. 4 is that the section of horizontal demister wherein of flue outlet is built using FLUENT pre-processing softwares GAMBIT Mould, identical with realistic model, mesh generation uses quadrangle/tessellation grid, and grid sum is 4.6 ten thousand.
Fig. 5 is the motion pattern that drop is moved in demister, by FLUENT simulation softwards simulate obtain, from motion pattern we As can be seen that droplet enters demister with air-flow from entrance, in the presence of inertia force, the lower wall surface that key strike goes up a slope is with The upper wall surface on slope, so as to be caught by wall, slowly forms larger drop and is slid from plate face, so as to reach the effect of demisting.
Fig. 6 is the concentration profile of drop in demister, it can be seen that the entrance and exit drop of demister is dense Degree there occurs obvious decline, and demisting works well.
Embodiments of the present invention are described in detail above in association with accompanying drawing, but the present invention is not limited to described reality Apply mode.For one of ordinary skill in the art, in the range of principle of the invention and technological thought, to these implementations Mode carries out various changes, modification, replacement and deformation and still falls within protection scope of the present invention.

Claims (8)

1. it is a kind of it is effective eliminate gypsum rain wet method fume desulfurizing system, including in desulfurizing tower to lower on be provided with reserve pit, Spraying layer and demister;There is flue entrance between reserve pit and spraying layer, it is characterised in that:The demister is included laterally Demister and longitudinal demister, the horizontal demister are arranged on the smoke outlet at the top of desulfurizing tower, horizontal demister lower section Collecting tank is provided with, pipeline is connected between the collecting tank and defroster cleaning apparatus.
2. it is according to claim 1 it is a kind of it is effective eliminate gypsum rain wet method fume desulfurizing system, it is characterised in that:It is described Longitudinal demister is provided in the two-layer above spraying layer.
3. it is according to claim 1 it is a kind of it is effective eliminate gypsum rain wet method fume desulfurizing system, it is characterised in that:It is described Horizontal demister is the folded plate type demister of individual layer.
4. it is according to claim 3 it is a kind of it is effective eliminate gypsum rain wet method fume desulfurizing system, it is characterised in that:Folded plate The knuckle of type demister is 120 °, 2.3m high.
5. it is according to claim 1 it is a kind of it is effective eliminate gypsum rain wet method fume desulfurizing system, it is characterised in that:It is described Valve is installed on pipeline.
6. it is according to claim 1 it is a kind of it is effective eliminate gypsum rain wet method fume desulfurizing system, it is characterised in that:It is described Collecting tank is directly communicated to slurry pool bottom by second pipe.
7. the sulfur method of a kind of effective wet method fume desulfurizing system for eliminating gypsum rain according to claim 1, it is special Levy and be:Flue gas is entered in desulfurizing tower with certain speed from flue entrance, is moved upwards along the short transverse of tower;It is same with this When, the slurries in slurry pool are extracted into spraying layer by slurry circulating pump, are sprayed by nozzle atomization and downwards, with upstream cigarette Gas carries out contact mixing, reacts, and the droplet of slurries spray is carried secretly and with certain speed by demister by flue gas, is removed Day with fog removes most of drop, but still has small part droplet to reach exhanst gas outlet with flue gas, is collected during by horizontal demister Liquid pool is collected, and the flue gas after being processed reaches air.
8. the sulfur method of a kind of effective wet method fume desulfurizing system for eliminating gypsum rain according to claim 7, it is special Levy and be:The droplet that the collecting tank is collected is used to clean longitudinal demister.
CN201611251604.9A 2016-12-30 2016-12-30 A kind of effective wet method fume desulfurizing system for eliminating gypsum rain Pending CN106731549A (en)

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CN201611251604.9A CN106731549A (en) 2016-12-30 2016-12-30 A kind of effective wet method fume desulfurizing system for eliminating gypsum rain

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CN201611251604.9A CN106731549A (en) 2016-12-30 2016-12-30 A kind of effective wet method fume desulfurizing system for eliminating gypsum rain

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107661685A (en) * 2017-10-12 2018-02-06 江苏广鸿环境工程有限公司 A kind of device for eliminating wet desulphurization gypsum rain
CN111906085A (en) * 2020-06-28 2020-11-10 淮阴工学院 Method for optimizing cleaning effect of reducing carbonization tower as cleaning tower

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2500374Y (en) * 2001-08-29 2002-07-17 暴辰生 Wet-type fume purifier with high-speed centrifugal dewatering demisting function
CN103446839A (en) * 2013-09-18 2013-12-18 王利国 Wet desulphurization system with multi-stage humidification demisting device
CN204522731U (en) * 2015-01-28 2015-08-05 北京中科创新园环境技术有限公司 The outer demist wet flue gas desulfurizer of tower
CN104984657A (en) * 2015-06-29 2015-10-21 苏跃进 Flue gas desulfurization method and flue gas desulfurization device
CN204768110U (en) * 2015-06-08 2015-11-18 南京师范大学 Promote mercury and fine particles device of desorption in coordination among wet flue gas desulfurization
CN105999862A (en) * 2016-06-20 2016-10-12 航天环境工程有限公司 Demister blade unit for demister, efficient demister and application

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2500374Y (en) * 2001-08-29 2002-07-17 暴辰生 Wet-type fume purifier with high-speed centrifugal dewatering demisting function
CN103446839A (en) * 2013-09-18 2013-12-18 王利国 Wet desulphurization system with multi-stage humidification demisting device
CN204522731U (en) * 2015-01-28 2015-08-05 北京中科创新园环境技术有限公司 The outer demist wet flue gas desulfurizer of tower
CN204768110U (en) * 2015-06-08 2015-11-18 南京师范大学 Promote mercury and fine particles device of desorption in coordination among wet flue gas desulfurization
CN104984657A (en) * 2015-06-29 2015-10-21 苏跃进 Flue gas desulfurization method and flue gas desulfurization device
CN105999862A (en) * 2016-06-20 2016-10-12 航天环境工程有限公司 Demister blade unit for demister, efficient demister and application

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107661685A (en) * 2017-10-12 2018-02-06 江苏广鸿环境工程有限公司 A kind of device for eliminating wet desulphurization gypsum rain
CN111906085A (en) * 2020-06-28 2020-11-10 淮阴工学院 Method for optimizing cleaning effect of reducing carbonization tower as cleaning tower
CN111906085B (en) * 2020-06-28 2021-08-17 淮阴工学院 Reducing carbonization tower

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Application publication date: 20170531

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