CN102580432A - Fume dedusting, desulfurating and denitriding integrated process - Google Patents
Fume dedusting, desulfurating and denitriding integrated process Download PDFInfo
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- CN102580432A CN102580432A CN201110099783XA CN201110099783A CN102580432A CN 102580432 A CN102580432 A CN 102580432A CN 201110099783X A CN201110099783X A CN 201110099783XA CN 201110099783 A CN201110099783 A CN 201110099783A CN 102580432 A CN102580432 A CN 102580432A
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Abstract
The invention provides a fume dedusting, desulfurating and denitriding integrated process, and aims at providing a fume purification technology and device to the atmosphere environment-friendly field. The process is composed of a wet phasing process (I), a lower vertical liquid oxidation and solid concentration process (III), an upper vertical concatenating wet increasing inhalable particle process (II) and an upper re-concatenating warming catalytic process (IV). The process device is characterized in that a ground oxidation and concentration tower (3) is serially connected with a wet increasing phasing tower (1), a wet electrostatic tower (2) and a warming catalytic tower (4) in turn, thereby forming a fume blow-down stack which belongs to a new 'fume tower integrated technology'.
Description
Technical field: technology of the present invention, flue gas ash removal, desulfurization, denitrification integrated technology are to the environmental protection field a kind of gas cleaning new technology and technology to be provided.
Background technology: gas cleaning at present divides three times.1, first dedusting.2, back desulfurization, 3 is back catalysis again
1, dedusting; Flue gas flow rate V ≠ 0, electrostatic precipitation rapping absorption pole plate, soot dust granule 100% breaks away from the absorption pole plate, gets back to again in the mobile flue gas.Flue gas has suspending power owing to flow, and the larger particles sedimentation breaks away from the flue gas that flows, and reaches the purification purpose.Less sucked soot dust granule can not sedimentation, is suspended in the flue gas that flows discharging and advances atmosphere.Cause solid pellet suspended pollution in air.In Liaoning Province Environmental Protection Agency aerosol pellet analysis report, say; Pellet 85% is that electrostatic precipitator in coal-fired power plant discharges into atmosphere in the atmosphere.
Bag-type dust is in the flow of flue gas, and cloth bag is advanced in smoke particle 100% suspension, and larger particles is filtered out by the cloth bag hole when suspending through the cloth bag hole, reaches purifying and dedusting.Less sucked particle suspends through the cloth bag hole, and directly atmosphere is advanced in discharging, causes solid pellet suspended pollution in air.
2, desulfurization; After semidry method and wet method/desulfurization, contain a large amount of SO
2The vaporific flue gas of secondary pollutant one calcium bisulfite aqueous solution droplet directly discharging advances atmosphere.Calcium bisulfite aqueous solution droplet is oxidized to the minimum 2 water gypsum particles that suck and is suspended in the atmosphere in atmosphere, formation can suck the particle suspended pollution.
Above process for purifying only is that a kind of secondary pollutant is polluted the process that another kind of secondary pollutant pollutes that becomes.And reduce and pollute.So be a kind of unsound, incomplete process for purifying.
3, use the catalyst denitrogenation
Shared 4 complete equipments take up an area of 4 districts, discharge vaporific flue gas.
Inventive features: the present invention does not exist together with general flue gas purifying technique maximum;
1., flue gas divided 3 purifications originally; 1, first dry method dust.2, after wet desulphurization again, 3 catalyst denitrogenations, 4 chimney emissions.
The present invention is flue gas ash removal, desulfurization, denitrogenation 1 wet cleaning completion in Environment protection chimney simultaneously.
2. former flue gas goes out big soot dust granule and calcium bisulfite aqueous solution particle through 1 sedimentation separation in the desulfurizing tower.Sucked soot dust granule that will not suspend again and SO
2Secondary pollutant droplet particle separates again.
The present invention increases, with the sucked soot dust granule and the SO that suspend
2Secondary pollutant droplet particle increases to hundred times greater than the particle that can suck the flue dust and the calcium bisulfite aqueous solution, in flowing, accomplishes sedimentation for the second time.Reach the efficient 100% that purifies solid, the various particle diameter particles of liquid.It is the maximum characteristic of the present invention.
3., originally gas cleaning, flue gas flow rate V is ≠ 0.Particularly wet desulphurization, V is greater than 2 meters.Flue gas 100% can suck the not sedimentation that suspends of a grade solid, liquid particles 100% in 2 meter per second flow velocitys.
The present invention is flue gas flow rate V ≠ 0, V≤2 meter per seconds.Greater than 2 meter per seconds, the present invention was just lost efficacy, and can not work.
4., former flue gas is by gas, fixed double phase flow, becomes the gas, liquid, solid three-phase through spray and flows the vaporific flue gas vaporific flue gas of discharging after the catalysis again.(contain and to suck liquid and solid particle).
The present invention is a flue gas behind spray, and the Dual-Phrase Distribution of Gas olid flue gas becomes the gas, liquid, solid three-phase and flows vaporific flue gas.Can suck particle technology (two) through the wet method increase again, intensification Catalytic processes (four) can suck particle with 100%, and sedimentation separation is come out.Become gas one phase flow water white transparency, oxygenous, nitrogen, the discharging of 2 carbonoxide gas mixed flue gas.
5., original SO in the flue gas
2Become the calcium bisulfite aqueous solution and advance the oxidation pond oxidation with air blast drum air.
The present invention makes into calcium bisulfite aqueous solution film liquid layer perpendicular flow, ingress of air direct oxidation technical process.Discarded air blast drum air advances the oxidation pond oxidation.
6., originally the water circulation is; Sprayed slurry is fallen the covert tower inner bottom part of humidification circulatory pool, rises to tower external oxidation pond for 1 time with pump, promotes concentration basin 2 times with pump again, promotes the dewaterer dehydration for the 3rd time with pump again.After adding desulfurizing agent with the 4th lifting of pump system stock tank again, rise to circulatory pool in the tower for the 5th time with pump again.Promote spray flue gas in the covert tower of humidification for the 6th time with circulating pump again.
Water circulation of the present invention is; Slurries behind the spray are vertically dropped into the concentration basin (6) in oxidation, the concentration tower (3).Concentration basin (6).Underflow is accomplished (7) 2 dehydrations of 1 concentrated laggard dewaterer and is prepared the moist solids particulate emission.Concentration basin (6) clarified solution overflow along oxidation, concentration tower (3) wall vertical current, is accomplished SO
2The secondary pollutant ingress of air reaches oxidation, and oxidation goes out 2 water gypsum particles and oxidation, concentration tower (3) interior ground circulatory pool (9) are advanced in the water outlet of reducing.Advance with circulating pump (5) first and promote the covert tower of humidification (1) spray.
7., owing to the wet electrostatic tower sucked droplet particle unique in the flue gas 100% is separated.So: no any pollutant does not just need original high 200 meters chimneys to fly away pollutant in the flue gas.Purify the new cigarette tower unification technique that the back flue gas directly discharges.
8., smoke catalytic was used catalyst originally,
The present invention is with nitrogen oxide in the direct catalysis flue gas of catalytic member.
Patent of the present invention; The purpose of dusting and desulfurizing technology for smoke;
1, soot dust granule in the flue gas 100% is separated.
2, with SO in the flue gas
2100% becomes the various size particles of secondary pollutant, 100% separates again.
3, with catalytic member the most of catalysis of nitrogen oxide is gone out oxygen and nitrogen, simultaneously saturated flue gas is become unsaturated fume emission.
Patent of the present invention; The embodiment of dusting and desulfurizing technology for smoke;
Flue gas ash removal, desulfurization, denitrification integrated technology;
The covert technology of wet method (one) lower vertical serial connection liquid oxidation, solids-enriched technology (three)
Upper vertical serial connection wet method increases can suck particle technology (two), is connected in series that intensification Catalytic processes (four) forms again.
The covert technology of wet method (one):
With the vaporific spray desulfurizing agent slurry of circulating pump (5), soot dust granule 100% becomes by the conductive particle of the various particle diameters of liquid parcel flue gas in the covert tower of wet method (1).SO
2100% becomes the calcium bisulfite aqueous conductive drop of various particle diameters.
Flue gas is at flow velocity V≤2 meter per seconds, and the critical size particles of sedimentation is to suck particle d.Flue gas flows in the covert tower of wet method (1), and greater than the particle that can suck particle d, (comprising by the flue dust conductive particle and the calcium bisulfite aqueous conductive drop of liquid parcel), the oxidation of bottom, the concentration basin (6) at concentration tower (3) top were advanced in 100% vertical landing.Accomplish the covert technology of wet method (one) of pollutant subsiding and purifying process for the first time.
Wet method increases can suck particle technology (two);
Contain 100%≤can suck the particle (comprising by flue dust conductive particle and the calcium bisulfite aqueous conductive droplet of liquid parcel) of particle d, wet electrostatic tower (2) is advanced in suspension.Conduction droplet particle is adsorbed the utmost point 100% absorption.Converge, increase at the absorption utmost point, increase weight becomes hundred times greater than the particle that can suck particle d, vertical landing, the mistake covert tower of wet method (1) advances the concentration basin (6) of oxidation, concentration tower (3).Accomplish residue can suck particle 100% for the second time the wet method separated of subsiding and purifying increase and can suck particle technology (two).
The solid particle that reaches 100% any particle diameter in the flue gas is separated, and reaches efficiency of dust collection.
SO
2100% becomes the calcium bisulfite aqueous solution, desulfuration efficiency 100%
Reclaim 100% (comprising various droplets) of calcium bisulfite aqueous solution efficient.
Liquid oxidation, solids-enriched technology (three)
The spray slurry is vertically dropped into the concentration basin (6) at oxidation, concentration tower (3) top behind the spray in the covert tower of wet method (1).Concentration basin (6) underflow is discharged underflow.Accomplishing the 1st solid particle concentrates.
Underflow is advanced dewaterer again and is concentrated for (7) 2 times, discharges the moist solids particle at last.Dewaterer (7) separates effluent recycling and advances circulatory pool (9).
Concentration basin (6) clarified solution overflow vertically flows to oxidation, concentration tower (3) interior ground circulatory pool (9) along oxidation, concentration tower (3) wall.Accomplish SO
2The secondary pollutant ingress of air reaches the liquid oxidation of oxidation and heat exchange, solids-enriched technology (three).
Wet electrostatic tower (2) isolates 100%, and can to suck flue gas behind liquid and the solid particle be the water white transparency saturated flue gas catalytic tower (4) that advances to heat up,
Intensification Catalytic processes (four)
Saturated flue gas becomes unsaturated flue gas through electric heating part (11) or heat exchanger heats intensification in intensification tower (4).Flue gas is warmed up to catalytic temperature.Cross catalytic member (12) catalysis and go out oxygen, nitrogen.Be mixed into CO
2Directly discharging in the gas.Flue gas oxidation that Here it is, concentration tower (3) vertically are connected in series smoke evacuation chimney-Environment protection chimney that the covert tower of wet method (1) vertically is connected in series wet electrostatic tower (2) serial connection intensification tower (4) again.It is " unification of cigarette tower " new technology of five towers unification.Environment protection chimney is polygon or circle.
Description of drawings;
Figure of description; Fig. 2, the denitrification integrated flow chart of flue-gas dust-removing and desulfurization
The covert technology of wet method (one) lower vertical serial connection liquid oxidation, solids-enriched technology (three)
Upper vertical serial connection wet method increases can suck particle technology (two)
Be connected in series intensification Catalytic processes (fours') flow chart again.
Figure of description; Fig. 1, Environment protection chimney technological process and equipment drawing
Oxidation, concentration tower (3) vertically are connected in series the covert tower of wet method (1), and upper vertical serial connection wet electrostatic tower (2) is connected in series the Environment protection chimney that intensification catalytic tower (4) is formed again.Be polygon or circle.
Flue gas advances the covert tower of wet method (1), at the covert tower of wet method (1), interiorly pumps liquid or the vaporific spray flue gas of slurry with circulating pump (5).Spray back liquid or slurry are fallen the concentration basin (6) of oxidation, concentration tower (3)
Vaporific flue gas advances that wet electrostatic tower (2) is isolated solid and liquid is fallen in the concentration basin (6) of oxidation, concentration tower (3),
Circulation fluid advances circulatory pool (9) in concentration basin (6) overflow
Concentration basin (6) underflow advances dewaterer (7) and deviates from the moist solids particulate emission, deviates from the water into circulatory pool (9) that refluxes
Circulating pump (5) pumps liquid or slurry vaporific spray flue gas in the covert tower of wet method (1), and flue gas becomes vaporific flue gas.Advance wet electrostatic tower (2)
Wet electrostatic tower (2) is isolated the water white transparency saturated flue gas catalytic tower (4) that advances to heat up.Saturated flue gas is heated to catalytic temperature through heating member (11) in intensification catalytic tower (4).Again through catalytic member (12) catalysis go out oxygen, nitrogen is mixed into CO2 gas, give off from intensification catalytic tower (4) outlet; The flue gas that unsaturated water white transparency oxygen, nitrogen, carbon dioxide gas mix.By → directly discharging.
Wet electrostatic tower (2) is isolated big drop and is crossed the concentration basin (6) that the covert tower of wet method (1) is dropped into oxidation, concentration tower (3).
Figure of abstract; Fig. 1
The practical implementation case
Flue gas; Contain SO
2, NO
xCoal-fired flue-gas.
Flue gas ash removal, desulfurization, denitrification integrated technical process.
1, flue gas " the covert technology of wet method;
Flue gas flow rate V=1.2 meter per seconds, by → advance the covert tower of wet method (1), in the covert tower of wet method (1) with the vaporific spray limestone slurry of circulating pump (5).Flue gas was detained 14 seconds in the covert tower of wet method (1).Flue gas becomes vaporific flue gas.
SO
2In 14 seconds 100% become the various particle diameters of the calcium bisulfite aqueous solution the drop particle, be suspended in the flue gas.
Flue gas flow rate is at V=1.2 meter per seconds, 100% greater than 10 microns particle, vertical sedimentation or washed in the concentration basin (6) by spray liquid.
Residue 100% can suck a grade liquid (comprising the calcium bisulfite aqueous solution) or is suspended in by the soot dust granule of liquid parcel advances wet electrostatic tower (2) in the flue gas.
2, wet method increases can suck particle technology;
Contain 100% less than the sucked drop particle of 10 micron grain sizes with by the soot dust granule of liquid parcel.At flow velocity V=1.2 meter per seconds in the warm therapy static tower (2) that suspends, are detained greater than 3 seconds.To can suck the drop particle and by soot dust granule 100% absorption of liquid parcel and converge, become drop particle less than 10 microns, vertically flow out wet electrostatic tower (2), advance in the covert tower of wet method (1) greater than 10 micron grain sizes.Because of particle increases hundred times, in the covert tower of wet method (1), can not suspend, advance concentration basin (6) with regard to 100% sedimentation.Reach soot dust granule in the gas cleaning process 100% is separated.With SO
2100% becomes secondary pollutant--the calcium bisulfite aqueous solution, 100% separate again.
The gas that does not contain any kind of liquid mist, soot dust granule behind the static is saturated, water white transparency flue gas by a → go out wet electrostatic tower (2) catalytic tower (4) that advances to heat up.
3, liquid oxidation, solids-enriched technology (three)
The clarified solution of the water and the calcium bisulfite aqueous solution in the concentration basin (6); Overflow vertically flows to circulatory pool (7) at oxidation, concentration tower (3) external wall; In the oxidation of wall ingress of air, output 2 water gypsum particles, the reduction water outlet is advanced ground annular circulatory pool (7) and is reached heat exchange simultaneously.Be recirculated water at normal temperatures, create the desulfurization optimum temperature.
2 water gypsum particles and soot dust granule and the water that restores and the calcium bisulfite aqueous solution is concentrated in the concentration basin (6), advances dewaterer (7) through outlet at bottom.Deviate from water and advance ground annular circulatory pool (9), deviate from the moist solids particulate emission.
Circulation fluid adds desulfurizing agent lime at circulatory pool (9), stirs through mixer (8).Vaporific spray flue gas in circulating pump (5) advances the covert tower of wet method (1) again.
4, intensification Catalytic processes (four)
The saturated flue gas that wet electrostatic tower (2) is discharged is warmed up to catalytic temperature through heating member (11) in intensification catalytic tower (4), become unsaturated flue gas, goes out oxygen and nitrogen through catalytic member (12) catalysis again, converges carbon dioxide gas and directly discharges through Environment protection chimney.
The Environment protection chimney structure; Circle or polygon.Vertically be connected in series the covert tower of wet method by the oxidation concentration tower, vertically be connected in series wet electrostatic tower (2) again, be connected in series the intensification catalytic tower again.Flue gas discharges from intensification catalytic tower top exit.
The saturated flue gas that wet electrostatic tower (2) is discharged detects in Environmental Protection Agency through Tianjin, reaches; Efficiency of dust collection 99.9%, desulfuration efficiency 99%, blackness of exhaustion be less than 1 grade, water white transparency.
Claims (7)
1. flue gas ash removal, desulfurization, denitrification integrated technology;
The covert technology of wet method (one) lower vertical serial connection liquid oxidation, solids-enriched technology (three)
Upper vertical serial connection wet method increases can suck particle technology (two), is connected in series that intensification Catalytic processes (four) forms again.
The covert technology of wet method (one):
With the vaporific spray desulfurizing agent slurry of circulating pump (5), soot dust granule 100% becomes by the conductive particle of the various particle diameters of liquid parcel flue gas in the covert tower of wet method (1).SO
2100% becomes the calcium bisulfite aqueous conductive drop of various particle diameters.
Flue gas is at flow velocity V≤2 meter per seconds, and the critical size particles of sedimentation is to suck particle d.Flue gas flows in the covert tower of wet method (1), and greater than the particle that can suck particle d, (comprising by the flue dust conductive particle and the calcium bisulfite aqueous conductive drop of liquid parcel), the oxidation of bottom, the concentration basin (6) at concentration tower (3) top were advanced in 100% vertical landing.Accomplish the covert technology of wet method (one) of pollutant subsiding and purifying process for the first time.
Wet method increases can suck particle technology (two);
Contain 100%≤can suck the particle (comprising by flue dust conductive particle and the calcium bisulfite aqueous conductive droplet of liquid parcel) of particle d, wet electrostatic tower (2) is advanced in suspension.Conduction droplet particle is adsorbed the utmost point 100% absorption.Converge, increase at the absorption utmost point, increase weight becomes hundred times greater than the particle that can suck particle d, vertical landing, the mistake covert tower of wet method (1) advances the concentration basin (6) of oxidation, concentration tower (3).Accomplish residue can suck particle 100% for the second time the wet method separated of subsiding and purifying increase and can suck particle technology (two).
The solid particle that reaches 100% any particle diameter in the flue gas is separated, and reaches efficiency of dust collection.
SO
2100% becomes the calcium bisulfite aqueous solution, desulfuration efficiency 100%
Reclaim 100% (comprising various droplets) of calcium bisulfite aqueous solution efficient.
Liquid oxidation, solids-enriched technology (three)
The spray slurry is vertically dropped into the concentration basin (6) at oxidation, concentration tower (3) top behind the spray in the covert tower of wet method (1).Concentration basin (6) underflow is discharged underflow.Accomplishing the 1st solid particle concentrates.
Underflow is advanced dewaterer again and is concentrated for (7) 2 times, discharges the moist solids particle at last.Dewaterer (7) separates effluent recycling and advances circulatory pool (9).
Concentration basin (6) clarified solution overflow vertically flows to oxidation, concentration tower (3) interior ground circulatory pool (9) along oxidation, concentration tower (3) wall.Accomplish SO
2The secondary pollutant ingress of air reaches the liquid oxidation of oxidation and heat exchange, solids-enriched technology (three).
Wet electrostatic tower (2) isolates 100%, and can to suck flue gas behind liquid and the solid particle be the water white transparency saturated flue gas catalytic tower (4) that advances to heat up,
Intensification Catalytic processes (four)
Saturated flue gas becomes unsaturated flue gas through electric heating part (11) or heat exchanger heats intensification in intensification tower (4).Flue gas is warmed up to catalytic temperature.Cross catalytic member (12) catalysis and go out oxygen, nitrogen.Be mixed into CO
2Directly discharging in the gas.Flue gas oxidation that Here it is, concentration tower (3) vertically are connected in series smoke evacuation chimney-Environment protection chimney that the covert tower of wet method (1) vertically is connected in series wet electrostatic tower (2) serial connection intensification tower (4) again.It is " unification of cigarette tower " new technology of five towers unification.Environment protection chimney is polygon or circle.
2. according to " flue gas ash removal, desulfurization, denitrification integrated technology " claim 1 said its characteristic;
Select flue gas flow rate V≤2 meter per seconds.
3. according to " flue gas ash removal, desulfurization, denitrification integrated technology " claim 1 said its characteristic;
Wet method increases can suck particle technology (two).Adsorb less than the particle that can suck particle with the Electrostatic Absorption utmost point.
4. according to " flue gas ash removal, desulfurization, denitrification integrated technology " claim 1 said its characteristic;
Equipment is that oxidation, the concentration tower (3) on ground vertically is connected in series the covert tower of wet method (1) and vertically is connected in series wet electrostatic tower (2) again, is connected in series the Environment protection chimney of the cigarette tower unification of intensification catalytic tower (4) again.
5. according to " flue gas ash removal, desulfurization, denitrification integrated technology " claim 1 said its characteristic;
Technology is the covert technology of wet method (one) lower vertical serial connection liquid oxidation, solids-enriched technology (three).
Upper vertical serial connection wet method increases can suck particle technology (two), is connected in series intensification Catalytic processes (fours') process sequence again.
6. according to " flue gas ash removal, desulfurization, denitrification integrated technology " claim 1 said its characteristic;
SO
2The secondary pollutant oxidation is concentration basin (6) clarified solution overflow, vertically flows to ground circulatory pool (9) along oxidation, concentration tower (3) wall, accomplishes SO
2The secondary pollutant ingress of air reaches the technical process of oxidation and heat exchange.
7. according to " flue gas ash removal, desulfurization, denitrification integrated technology " claim 1 said its characteristic;
Environment protection chimney is polygon or circular configuration.
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| CN201110099783XA CN102580432A (en) | 2011-04-21 | 2011-04-21 | Fume dedusting, desulfurating and denitriding integrated process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103263839A (en) * | 2013-05-22 | 2013-08-28 | 庄建中 | Environment-friendly Coal-fired flue gas dedusting, desulfurizing and denitrifying chimney |
| CN103263829A (en) * | 2013-05-22 | 2013-08-28 | 庄建中 | Dedusting, desulfurization and denitrification process of coal-fired flue gas |
| CN105233600A (en) * | 2015-09-17 | 2016-01-13 | 张嘉杰 | Integrated desulphurization and dedusting apparatus |
| CN105688590A (en) * | 2016-04-19 | 2016-06-22 | 庄建中 | Purifying equipment and purifying process for refuse combustion smoke |
| CN106474921A (en) * | 2016-12-03 | 2017-03-08 | 福建众辉环保设备有限公司 | A kind of waste gas cleaning system |
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| CN2459085Y (en) * | 2000-07-10 | 2001-11-14 | 庄建中 | Wet type electrostatic device |
| CN2505163Y (en) * | 2000-07-10 | 2002-08-14 | 庄建中 | Flue gas dusting and desulfurizing electrostatic tower |
| CN1981911A (en) * | 2005-12-14 | 2007-06-20 | 新疆大学 | Multifunctional integrated flue purifier of boiler |
| CN102580431A (en) * | 2011-04-20 | 2012-07-18 | 庄建中 | Dedusting and dusulfuration integration process for smoke |
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| JPS5520633A (en) * | 1978-08-01 | 1980-02-14 | Mitsui Miike Mach Co Ltd | Process control method of wet type lime gypsum method exhaust gas desulfurization apparatus |
| CN2459085Y (en) * | 2000-07-10 | 2001-11-14 | 庄建中 | Wet type electrostatic device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103263839A (en) * | 2013-05-22 | 2013-08-28 | 庄建中 | Environment-friendly Coal-fired flue gas dedusting, desulfurizing and denitrifying chimney |
| CN103263829A (en) * | 2013-05-22 | 2013-08-28 | 庄建中 | Dedusting, desulfurization and denitrification process of coal-fired flue gas |
| CN105233600A (en) * | 2015-09-17 | 2016-01-13 | 张嘉杰 | Integrated desulphurization and dedusting apparatus |
| CN105688590A (en) * | 2016-04-19 | 2016-06-22 | 庄建中 | Purifying equipment and purifying process for refuse combustion smoke |
| CN105688590B (en) * | 2016-04-19 | 2018-01-30 | 庄建中 | Combustion refuse flue gas purifying equipment and purification technique |
| CN106474921A (en) * | 2016-12-03 | 2017-03-08 | 福建众辉环保设备有限公司 | A kind of waste gas cleaning system |
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Application publication date: 20120718 |