CN106310907A - Device and method for combined removal of CO2 and fine particles of coal power plant - Google Patents

Device and method for combined removal of CO2 and fine particles of coal power plant Download PDF

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Publication number
CN106310907A
CN106310907A CN201610890495.9A CN201610890495A CN106310907A CN 106310907 A CN106310907 A CN 106310907A CN 201610890495 A CN201610890495 A CN 201610890495A CN 106310907 A CN106310907 A CN 106310907A
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membrane
fine particle
coal
power plant
combined
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杨林军
张琳
胡斌
李娟�
周心澄
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Southeast University
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Southeast University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0032—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions using electrostatic forces to remove particles, e.g. electret filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
    • B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/14—Separation 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 by absorption
    • B01D53/1456—Removing acid components
    • B01D53/1475—Removing carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/14—Separation 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 by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/22—Separation 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 by diffusion
    • B01D53/228—Separation 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 by diffusion characterised by specific membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/22—Separation 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 by diffusion
    • B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/204—Amines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/204—Amines
    • B01D2252/20415—Tri- or polyamines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/204—Amines
    • B01D2252/20478—Alkanolamines
    • B01D2252/20484—Alkanolamines with one hydroxyl group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/204—Amines
    • B01D2252/20478—Alkanolamines
    • B01D2252/20489—Alkanolamines with two or more hydroxyl groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/205—Other organic compounds not covered by B01D2252/00 - B01D2252/20494
    • B01D2252/2053—Other nitrogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Abstract

The invention provides a device and a method for combined removal of CO2 and fine particles of a coal power plant. A multi-membrane de-dusting-membrane absorption method is utilized to realize the efficient gathering of CO2 and the ultra-clean removal of fine particles, a multi-level plate type membrane is adopted for removing the residual particle components in the exhaust gas, and then a hollow fibrous membrane absorption method is utilized to collect CO2. According to the method provided by the invention, the damage and performance deterioration of microcellular structure of membrane can be effectively reduced in the process of membrane absorbing CO2, the long-term efficient stable running of membrane absorbing CO2 can be realized, the deep removal of the fine particles in the exhaust gas can be completed and the ultra-clean emission can be achieved.

Description

A kind of bituminous coal power plant CO2The device and method of removing is combined with fine particle
Technical field
The invention belongs to environmental protection and energy saving technology and collecting carbonic anhydride technical field, relate to a kind of coal-burning power plant CO2With carefully Particulate matter combines the apparatus and method of removing, can realize CO simultaneously2The efficiently control discharge of trapping and fine particle.
Background technology
As topmost greenhouse gases, CO2Many environmental problems can be caused, make CO2Trapping technique becomes what attracted attention in the world Focus.Along with the quickening of industry rhythm, the demand of Fossil fuel and consumption increased severely with day.The data of IEA show, only 2013 I The CO of state2Total emission volumn has reached 8.5 hundred million tons, according to statistics, and the CO of coal-burning power plant2Discharge capacity accounts for whole nation CO2Total emission volumn 40%.Therefore, for the CO of coal-burning power plant2Trap particularly important.
At numerous coal fired power plant CO2In trapping technique, film absorbs CO2Technology is with its loading density height, simple in construction, operation Conveniently, energy consumption is low and advantages of environment protection was developed rapidly in recent years, becomes CO the most both at home and abroad2Trapping is mainly ground Study carefully one of technology.Chemical absorbing and membrane technology are efficiently combined by membrane absorption method, solve the liquid flooding in traditional chemical absorption techniques, Entrainment, etc. problem, doughnut film throughput is big, expands flexibly, has good prospects for commercial application.In many research In
But, the flue gas of coal-burning power plant's actual discharge not only comprises CO2And N2, possibly together with thin that electric precipitation is removing Grain thing component.The result of study of Brands etc. represents, is exposed to the open air by inoranic membrane in actual coal-fired flue-gas after 400h, and film surface covers Fine and close flying dust/gypsum filter cake layer, and its separating property have dropped 91.8%.Under limestone/gypsum desulfurization environment, Bram Etc. have studied inorganic Co-SiO2Film and Ti0.5Zr0.5O2The separating property of ceramic membrane, finds that the separating property of two kinds of films all has substantially Deteriorate.Study display, actual power-plant flue gas is being carried out long embrane method CO2Trapping, fines fraction meeting in flue gas Heavy damage membrane micropore structure, forms cake layer, increases film phase resistance, reduce membrane mass transfer, ultimately result in film properties on film surface It is remarkably decreased and even lost efficacy.
Summary of the invention
For overcoming above-mentioned prior art defect, present invention aim at providing a kind of bituminous coal factory CO2Combine with fine particle The apparatus and method of removing, have simple in construction, the easy to operate and feature of low energy consumption, can realize film and absorb CO2Long-term steady Fixed operation, has good removal effect simultaneously, finally realizes ultra-clean discharge fine particle.
The main technical schemes of the present invention: a kind of coal-burning power plant CO2The device of removing is combined, by flue gas stream with fine particle Dynamic direction is by desulfurizer, multistage board-like membrane granule object depth degree removing means and hollow-fibre membrane CO2Capturing device is connected；Described Multistage board-like membrane granule object depth degree removing means in be provided with Multistage Membranes blade unit, for multistage micrometer level porous organic diaphragm.Institute The multistage diaphragm stated is one or more in polypropylene, politef, Kynoar, and pore diameter range is at 45 μm～300 μ M,
Flow-rate adjustment dress it has been sequentially connected in series between described desulfurizer and multistage board-like membrane granule object depth degree removing means Put and surge tank.
Described hollow-fibre membrane CO2The top of capturing device is provided with gas approach, and top waste liquid outlet is with waste liquid tank even Connecing, the absorbing liquid import of bottom is connected with absorbing liquid bath via peristaltic pump, and bottom is additionally provided with gas discharge outlet.
Described hollow-fibre membrane CO2Capturing device is composed in series by a single or many hollow fiber film assembly.
Coal-burning power plant CO described in employing2The CO of the device of removing is combined with fine particle2Removing is combined with fine particle Method, it is characterised in that: first coal-fired flue-gas carries out wet ammonia process desulfurizing or wet-type calcium desulfuration, desulfurization through desulfurizer (1) Tower exit gas temperature is at 30～60 DEG C, containing the volumetric concentration 10～CO of 15%2, particulate matter mass concentration is about 30～200mg/ m3, containing a small amount of SO2、SO3、NOx, steam, and moisture content is close to saturated, and wherein, fine particle composition includes: burned-coal fly ash, (NH4)2SO3、NH4HSO3、(NH4)2SO3·H2O or CaSO4、Ca(HSO4)2、CaSO4·H2O aerosol particle；After desulfurization First flue gas flows into surge tank through flow regulator, subsequently enters multistage board-like membrane granule object depth degree removing means and carries out the degree of depth Removing fine particle, enters back into hollow-fibre membrane CO2Capturing device carries out CO2Trapping；Hollow-fibre membrane CO is entered by top2Catch The absorbing liquid that flue gas in acquisition means and bottom pump into flows in reverse flow mode at hollow-fibre membrane tube side and shell side respectively Carry out CO2Trapping, the vent gas after process is discharged after reaching ultra-clean discharge standard.
Absorbing liquid after using is collected in waste liquid tank parsing Posterior circle and uses.
Described absorbing liquid select monoethanolamine, diethanolamine, N methyldiethanol amine, triethylene tetramine, diethylenetriamine, The combination solution of one or more in glycine potassium；Absorbing liquid concentration is 0.4～0.8mol/L.
Control hollow-fibre membrane CO2The liquid-gas ratio of capturing device is 0.02～0.05.
The entrance flue gas temperature of described multistage board-like membrane granule object depth degree removing means at 30～60 DEG C, particulate matter quality Concentration is 10～100mg/m3, CO2Concentration is 10-15%.
Beneficial effects of the present invention:
The present invention uses Multistage Membranes dedusting-membrane absorption method, by the regulation aperture of membrane material, operation level number, and absorbing liquid The gentle liquid proportional of concentration, it is achieved synchronously CO2Efficiently trapping and the ultra-clean removing of fine particle；Can effectively reduce film and absorb CO2 During, membrane micropore structural damage and penalty, film can be realized and absorb CO2Long-term efficient stable runs, again can be complete Become fine particle deep removal in flue gas, and simple in construction, easy to operate, energy consumption is low.
Multistage board-like membrane granule object depth degree removing means is provided with Multistage Membranes blade unit, utilizes between particulate matter and membrane material Produced by collision friction, electrostatic force, capillary force and liquid bridge power carry out degree of depth particulate matter removing.
Accompanying drawing explanation
Accompanying drawing 1 is embodiment of the present invention process flow diagram.
In figure, 1-desulfurizer, 2-flow regulator, 3-surge tank, the multistage board-like membrane granule thing deep removal of 4-fills Put, 5-hollow-fibre membrane CO2Capturing device, 6-waste liquid tank, 7-absorbs liquid bath, 8-peristaltic pump.
Detailed description of the invention:
A kind of smoke carbon dioxide and particulate matter combined removal technique, use multistage plate type membrane component to thin in desulfurization fume Particulate matter deep removal, is provided with Multistage Membranes blade unit in multistage board-like membrane granule object depth degree removing means, material uses multistage micro- The organic diaphragm of meter level porous, its pore diameter range, in 45 μm～300 μm, utilizes the collision friction between particulate matter and membrane material to be produced Electrostatic force, capillary force and liquid bridge power carry out degree of depth particulate matter removing；The flue gas that the content of fine particle is the lowest subsequently enters Entering hollow fiber film assembly and carry out the absorption trapping of high-efficiency carbon dioxide rate, finally, hyperpure gas after treatment can directly discharge Enter atmospheric environment.Whole system utilizes the remaining gentle desulfurizing tower muzzle velocity of desulfurization fume to complete particulate matter and CO2Combine de- Removing, membrane removal absorbing liquid needs to use peristaltic pump to introduce outside assembly, it is not necessary to other are outer for the energy.
Usually, the invention mainly comprises: fine particle deep removal system and membrane absorption system.Needed for present invention process Concrete equipment has surge tank, multistage plate type membrane component, hollow fiber film assembly, peristaltic pump, absorbing liquid storage tank, waste liquid tank, CO2Point Analyzer, flue gas analyzer etc..
Described desulfurization fume (30～60 DEG C) first flows into surge tank through flow control valve, and flue gas pressures and temperature are by pressure Table and thermometer are monitored in real time, subsequently enter multistage plate type membrane component and carry out deep removal fine particle, record board-like simultaneously Membrane module imports and exports flue gas flow rate and temperature, and detects exit smoke components and CO2Concentration；Flue gas after degree of depth dedusting is through turning Subflow gauge enters doughnut absorbing film tube side and carries out CO2Trapping, absorbing liquid is pumped into hollow-fibre membrane shell side by peristaltic pump, inhales Receiving liquid concentration is 0.4～0.8mol/L, and to control liquid-gas ratio be 0.02～0.05, and gas-liquid is respectively at hollow-fibre membrane tube side and shell Journey flows in reverse flow mode.
Described multistage plate-type membrane material can be polypropylene (PP), politef (PTFE), Kynoar (PVDF) etc. One or more, its aperture can be μm～300 μm.Described absorbing liquid can be selected for monoethanolamine (MEA), diethanolamine (DEA, In MDEA (N methyldiethanol amine), TETA (triethylene tetramine), DETA (diethylenetriamine), glycine potassium (PG) etc. one Plant or multiple combination solution, and can use through resolving Posterior circle.
Embodiment 1
Using wet method ammonia method desulfurizing system, desulfurizing tower exit gas temperature 45 DEG C, containing the CO of volumetric concentration 12%2, granule Thing mass concentration is about 30mg/m3, SO2Content about 30mg/m3, moisture content is close to saturated.Above-mentioned desulfurization fume is passed through this Bright described device, after multistage plate type membrane component deep removal fine particle, particulate matter mass concentration is reduced to 5mg/m3Hereinafter, Subsequently enter hollow-fibre membrane and carry out CO2Trapping, the MEA selecting concentration 0.5mol is absorbing liquid.Through above-mentioned PROCESS FOR TREATMENT 10h After, CO2Removal efficiency is still in holding more than 75%, and in emptying flue gas, particulate matter mass concentration is less than 5mg/m3, it is achieved ultralow row Put.The desulfurization fume processed without device of the present invention, directly carries out CO2When film absorbs trapping, fine grained in emptying flue gas Thing mass concentration is about 10mg/m3, CO2Removal efficiency is reduced to 65%.By comparison, after using device of the present invention to process, In final flue gas, particle concentration reduces by 50%, CO2Removal efficiency improves 13.3%.
Embodiment 2
Using wet method ammonia method desulfurizing system, desulfurizing tower exit gas temperature 60 DEG C, containing the CO of volumetric concentration 12%2, granule Thing mass concentration is about 50mg/m3, SO2Content about 30mg/m3, moisture content is close to saturated；Wherein, fine particle composition is main It is: burned-coal fly ash, (NH4)2SO3、NH4HSO3、(NH4)2SO3·H2The aerosol particles such as O.Above-mentioned desulfurization fume is passed through this Inventing described device, after multistage plate type membrane component deep removal fine particle, particulate matter mass concentration is reduced to 8mg/m3With Under, subsequently enter hollow-fibre membrane and carry out CO2Trapping, the MEA selecting concentration 0.5mol is absorbing liquid.Through above-mentioned PROCESS FOR TREATMENT After 10h, CO2Removal efficiency is still in holding more than 78%, and in emptying flue gas, particulate matter mass concentration is less than 5mg/m3, can realize Ultra-clean discharge.The desulfurization fume processed without device of the present invention, directly carries out CO2When film absorbs trapping, in emptying flue gas Fine particle quality concentration is about 15mg/m3, CO2Removal efficiency is reduced to 67%.By comparison, device of the present invention is used After process, in final flue gas, particle concentration reduces by 67%, CO2Removal efficiency improves 14.1%.
Embodiment 3
Using calcium method desulphurization system, desulfurizing tower exit gas temperature 45 DEG C, containing the CO of volumetric concentration 12%2(less than 12% Time, use CO2Steel cylinder gas is supplied), particulate matter mass concentration is about 35mg/m3, SO2Content about 30mg/m3, moisture content is close to full With；Wherein, fine particle composition is for predominantly: burned-coal fly ash, CaSO4、Ca(HSO4)2、CaSO4·H2The aerosol particles such as O.Will Above-mentioned desulfurization fume is passed through device of the present invention, after multistage plate type membrane component deep removal fine particle, and particulate matter quality Concentration is reduced to 5mg/m3Hereinafter, subsequently enter hollow-fibre membrane and carry out CO2Trapping, selects the MEA of concentration 0.5mol for absorbing Liquid.After above-mentioned PROCESS FOR TREATMENT 10h, CO2Removal efficiency still particulate matter quality in keeping more than 76.5%, and emptying flue gas Concentration is less than 5mg/m3, substantially realize ultra-clean discharge.The desulfurization fume processed without device of the present invention, directly carries out CO2Film When absorbing trapping, in emptying flue gas, fine particle quality concentration is 10mg/m3, CO2Removal efficiency is reduced to 63%.By comparison, After using device of the present invention to process, in final flue gas, particle concentration reduces by 50%, CO2Removal efficiency improves 15%.
Embodiment 4
Using calcium method desulphurization system, desulfurizing tower exit gas temperature 45 DEG C, containing the CO of volumetric concentration 12%2(less than 12% Time, use CO2Steel cylinder gas is supplied), particulate matter mass concentration is about 55mg/m3, SO2Content about 30mg/m3, moisture content is close to full With；Wherein, fine particle composition is for predominantly: burned-coal fly ash, CaSO4、Ca(HSO4)2、CaSO4·H2The aerosol particles such as O.Will Above-mentioned desulfurization fume is passed through device of the present invention, after multistage plate type membrane component deep removal fine particle, and particulate matter quality Concentration is reduced to 8mg/m3Hereinafter, subsequently enter hollow-fibre membrane and carry out CO2Trapping, selects the MEA of concentration 0.5mol for absorbing Liquid.After above-mentioned PROCESS FOR TREATMENT 10h, CO2Removal efficiency is still keeping more than 78%, and it is dense to empty particulate matter quality in flue gas Degree is less than 5mg/m3, ultra-clean discharge can be realized.The desulfurization fume processed without device of the present invention, directly carries out CO2Film absorbs During trapping, in emptying flue gas, fine particle quality concentration is 15mg/m3, CO2Removal efficiency is reduced to 66.7%.By comparison, adopt After processing with device of the present invention, in flue gas, particle concentration reduces by 66%, CO2Removal efficiency improves 13.3%.With without Device of the present invention processes, and directly carries out CO2Film absorbs trapping and compares, and in final flue gas, particle concentration reduces by 67%, CO2 Removal efficiency improves 14.5%.

Claims (10)

1. a coal-burning power plant CO2The device of removing is combined with fine particle, it is characterised in that: by flow of flue gas direction by desulfurization Device (1), multistage board-like membrane granule object depth degree removing means (4) and hollow-fibre membrane CO2Capturing device (5) is connected；Described Multistage board-like membrane granule object depth degree removing means (4) is provided with Multistage Membranes blade unit, for multistage micrometer level porous organic diaphragm.
Coal-burning power plant CO the most according to claim 12The device of removing is combined with fine particle, it is characterised in that: described Multistage diaphragm is one or more in polypropylene, politef, Kynoar, and pore diameter range is in 45 μm ~ 300 μm.
Coal-burning power plant CO the most according to claim 12The device of removing is combined, it is characterised in that described with fine particle It is sequentially connected in series flow regulator (2) between desulfurizer (1) and multistage board-like membrane granule object depth degree removing means (4) to ease up Rush tank (3).
Coal-burning power plant CO the most according to claim 12The device of removing is combined, it is characterised in that described with fine particle Hollow-fibre membrane CO2The top of capturing device (5) is provided with gas approach, and top waste liquid outlet is connected with waste liquid tank (6), bottom Absorbing liquid import is connected with absorbing liquid bath (7) via peristaltic pump (8), and bottom is additionally provided with gas discharge outlet.
Coal-burning power plant CO the most according to claim 12The device of removing is combined with fine particle, it is characterised in that: described Hollow-fibre membrane CO2Capturing device (5) is composed in series by a single or many hollow fiber film assembly.
6. use the arbitrary described coal-burning power plant CO of claim 1 ~ 52The CO of the device of removing is combined with fine particle2With thin The method that grain Internet of Things closes removing, it is characterised in that: first coal-fired flue-gas carries out wet ammonia process desulfurizing or wet type through desulfurizer (1) Calcium method desulfurization, desulfurizing tower exit gas temperature is 30 ~ 60oC, containing the CO of volumetric concentration 10 ~ 15%2, particulate matter mass concentration is about 30~200mg/m3, containing a small amount of SO2、SO3、NOx, steam, and moisture content is close to saturated, and wherein, fine particle composition includes: combustion Coal fly ash, (NH4)2SO3、NH4HSO3、(NH4)2SO3·H2O or CaSO4、Ca(HSO4)2、CaSO4∙H2O aerosol particle；Through de- First flue gas after sulfur flows into surge tank (3) through flow regulator (2), subsequently enters multistage board-like membrane granule thing deep removal Device (4) carries out deep removal fine particle, enters back into hollow-fibre membrane CO2Capturing device (5) carries out CO2Trapping；Entered by top Enter hollow-fibre membrane CO2The absorbing liquid that flue gas in capturing device (5) and bottom pump into is respectively at hollow-fibre membrane tube side and shell Journey flows in reverse flow mode and carries out CO2Trapping, the vent gas after process is discharged after reaching ultra-clean discharge standard.
Employing coal-burning power plant CO the most according to claim 62The CO of the device of removing is combined with fine particle2With fine grained Internet of Things closes the method for removing, it is characterised in that: the absorbing liquid after use is collected in waste liquid tank (6) and resolves Posterior circle use.
Employing coal-burning power plant CO the most according to claim 62The CO of the device of removing is combined with fine particle2With fine grained Internet of Things close removing method, it is characterised in that: described absorbing liquid select monoethanolamine, diethanolamine, N methyldiethanol amine, three The combination solution of one or more in ethylene tetramine, diethylenetriamine, glycine potassium；Absorbing liquid concentration is 0.4 ~ 0.8mol/L。
Employing coal-burning power plant CO the most according to claim 62The CO of the device of removing is combined with fine particle2With fine grained Internet of Things closes the method for removing, it is characterised in that: control hollow-fibre membrane CO2The liquid-gas ratio of capturing device (5) is 0.02 ~ 0.05.
Employing coal-burning power plant CO the most according to claim 62The CO of the device of removing is combined with fine particle2With fine grained Internet of Things closes the method for removing, it is characterised in that: the inlet flue gas temperature of described multistage board-like membrane granule object depth degree removing means (4) Degree is 30 ~ 60oC, particulate matter mass concentration is at 10 ~ 100mg/m3, CO2Concentration is 10-15%.
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