CN201664576U - Apparatus for removing sulfur dioxide in flue gas by ammonia water - Google Patents
Apparatus for removing sulfur dioxide in flue gas by ammonia water Download PDFInfo
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- CN201664576U CN201664576U CN2010202922345U CN201020292234U CN201664576U CN 201664576 U CN201664576 U CN 201664576U CN 2010202922345 U CN2010202922345 U CN 2010202922345U CN 201020292234 U CN201020292234 U CN 201020292234U CN 201664576 U CN201664576 U CN 201664576U
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Abstract
The utility model relates to an apparatus for removing sulfur dioxide in flue gas by ammonia water, which comprises an absorbing tower that is provided with a tower bottom pulp pool, a spraying layer, a stuffing layer, and a demister from bottom to top, the middle part of the absorbing tower is positioned under the spraying layer, a flue gas inlet is provided above the tower bottom pulp pool, a flue gas outlet is arranged at the top of the absorbing tower; an aeration pipe is arranged in the tower bottom pulp pool of the absorbing tower; circulation pumps are arranged outside the absorbing tower, and the number of the circulation pumps is consistent with the number of the spraying layer, each circulation pump outlet is respectively connected with a spraying device at one spraying layer, the demister is mounted above the absorbing tower, each circulation pump inlet is respectively connected with the tower bottom pulp pool of the absorbing tower; and an on-line filter is arranged outside the tower, the filtered unsaturated ammonia sulfate solution is taken as the absorption solution of the stuffing layer, the stuffing scale formation and plugging can be prevented thoroughly. The utility model has advantages that the desulfuration efficiency is high, the liquid and gas ratio is low, the scale formation and plugging are not easy to generate, the contents of the ammonia sulfate granules and liquid droplets carried within the outlet flue gas are low, and the by-product quality is good.
Description
Technical field
The utility model belongs to boiler exhaust gas, sintering device flue gas processing technology field, and particularly a kind of new ammoniacal liquor that utilizes removes the device of sulfur dioxide in flue gas.
Background technology
At present, ammonia process removes the mode that sulfur dioxide in flue gas mainly adopts spray to absorb, and the absorption tower mainly contains two kinds of forms: a kind of is hollow-spraying-tower, and the void tower type spray column is simple in structure, is difficult for producing fouling and stops up.It is lower that but the deficiency of this device is an absorption efficiency, if guarantee the desulfurization degree of desulphurization system, must increase the spray flux of absorption liquid, promptly adopts bigger liquid-gas ratio, will certainly cause whole plant energy consumption to increase like this.In addition, adopt the void tower type spray column, the fine ammonium sulfate and the fine drop that form in the absorption process are carried secretly by flue gas easily, and surrounding environment is caused secondary pollution.
Another kind is to adopt packed tower, adopts packed tower can significantly increase the gas-liquid contact area, improves absorption efficiency, reduces the absorption liquid spray flux, makes that absorbing the operation liquid-gas ratio reduces, and can reduce plant energy consumption.But, add that the saturated solution that forms in the absorption process very easily forms crystallization at filling surface, will produce fouling like this and stop up in filler owing to can have a large amount of dusts usually in the flue gas.The actual packed absorber that uses, all must clear up replacing to filler every year, and maintenance workload is very big, and serious causes flue gas flow rate sharply to increase because filler stops up, and filler is blown to turn over cave in.
Summary of the invention
The purpose of this utility model provides a kind of new ammoniacal liquor that utilizes to remove the device of sulfur dioxide in flue gas in order to overcome the deficiency that above-mentioned prior art exists.The utility model provides the new device that utilizes ammoniacal liquor to remove sulfur dioxide in flue gas to comprise a kind of novel absorption tower, this novel absorption tower adopts hollow-spraying-tower and filler to carry out reasonable combination, and pot strainer is set outside tower, unsaturated ammonium sulfate after the filtration is the absorption liquid of packing layer, thoroughly removes the possibility that the filler fouling is stopped up.Utilize this device come its desulfuration efficiency height of desulfurization, liquid-gas ratio low, be not easy to produce that fouling is stopped up, the ammonium sulfate carried secretly in the outlet flue gas and advantage such as droplet content is low, the byproduct quality is good.
The technical scheme that the utility model is taked is:
Utilize ammoniacal liquor to remove the device of sulfur dioxide in flue gas, comprise absorption tower and circulating pump, it is characterized in that: described absorption tower comprises tower prime cement pond, spraying layer, packing layer, the demister on absorption tower from the bottom to top, the middle part, absorption tower is positioned at the below of spraying layer, the top in tower prime cement pond is provided with smoke inlet, and the top, absorption tower is provided with exhanst gas outlet; Be provided with aeration tube in the tower prime cement pond on described absorption tower; The absorption tower is outside equipped with circulating pump, and the quantity of circulating pump is consistent with the number of plies of spraying layer, every outlet of circulating pump links to each other with spray thrower in one deck spraying layer respectively, and demister is installed in top, absorption tower, and every inlet of circulating pump links to each other with the tower prime cement pond on absorption tower respectively.
Device of the present utility model also comprises excavationg pump, cyclone, centrifuge, drier, filtrate box, filtration liquid pump, pot strainer, clear liquid pump, bottom in the tower prime cement pond on absorption tower links to each other with the excavationg pump import, discharges delivery side of pump and links to each other with the import of cyclone; The underflow pipe of described cyclone links to each other with the centrifuge import; The overflow pipe of described cyclone links to each other with the filtrate pipe of described centrifuge and converges the back and links to each other with the top of filtrate box; The discharge nozzle of described centrifuge links to each other with the drier import; Described filtrate box links to each other with pot strainer by filtrate pump, and wherein the import of filtrate pump links to each other with the bottom of filtrate box, and the filtrate delivery side of pump links to each other with the import of pot strainer; The outlet of described pot strainer is provided with clear liquid pump, and wherein the import of clear liquid pump links to each other with the outlet of pot strainer, and the clear liquid delivery side of pump links to each other with the packing layer on absorption tower.
Be used for utilizing ammoniacal liquor to remove the method for sulfur dioxide in flue gas in device of the present utility model, carry out according to the following steps: (1), flue gas or the next flue gas of sintering machine that boiler is come enter the absorption tower by flue from the adsorption tower smoke inlet; (2), in the absorption tower, flue gas upwards absorbs processing by spraying layer, packing layer, flue gas is by spraying layer, carries out counter current contacting with the absorption liquid of spray, mass transfer and absorption reaction takes place, to remove the SO in the flue gas
2, SO
3, HCl, HF pollutant and remove dust; Flue gas after the spraying layer dedusting continues to rise in the absorption tower, enter packing layer, continue to take place mass transfer and absorption at filling surface and absorption liquid, and absorb fine ammonium sulfate and the drop that spraying layer produces, last flue gas is discharged from the cat head exhanst gas outlet after the demist of cat head demister; (3) absorption liquid of packing layer and spraying layer lands downwards, evaporates part moisture through high-temperature flue gas, flue gas cool-down, absorption liquid is evaporated behind the moisture progressively concentrates, and separate out ammonium sulfate, ammonium sulfite crystal; All absorption liquids all are pooled in the stock tank of bottom, absorption tower, in stock tank, by aeration tube bubbling air, ammoniacal liquor or gas ammonia, the effect of air is that sulfite oxidation is become ammonium sulfate, the effect of ammoniacal liquor or gas ammonia be the pH value of regulator solution to 5-6, make ammonium bisulfite, ammonium hydrogen sulfate in the solution change into ammonium sulfite, ammonium sulfate; (4) by squeezing into spraying layer with the circulating pump that links to each other at the bottom of the tower, circulating pump and spray thrower adopt unit system to the slurries in tower prime cement pond respectively, every layer of corresponding circulating pump of spray thrower; When (5) the slurries suspended solids content in tower prime cement pond reaches 3%-10%, at the bottom of the tower by excavationg pump get to cyclone carry out again through centrifuge, drier dehydrate the ammonium sulfate fertilizer finished product; (6) overflowing liquid separated of cyclone and the centrifuge filtrate of separating add water with a spot of ammonium sulfate crystallization dissolving after, become the ammonium sulfate that concentration is 30%-40%, this solution is entered pot strainer by filtrate box, filtrate pump 15 carry out the essence filtration, remove the dust of diameter greater than 1 μ m, the settled solution after the filtration is squeezed into the absorption liquid of absorption tower as packing layer through clear liquid pump.
Described spraying layer sprays into tiny drop by spray thrower with the absorption liquid that circulates, and contacts with the flue gas adverse current that rises, to reach the purpose of mass transfer, absorption; Described spraying layer is the 1-3 layer, and the spray thrower of each layer all is formed by connecting by connection pipe and shower nozzle.
The absorption liquid of described spraying layer is squeezed into by circulating pump by slurries in the tower prime cement liquid pool, and the absorption liquid of spraying layer is the ammonium sulfate-ammonium sulfite mixed serum that contains suspended solid and mass concentration 3%-10%.
The absorption liquid of described packing layer is squeezed into by the outer online filter filtrate of tower, and absorption liquid is the sulfuric acid solution of mass concentration 30%-40%.
Described packing layer is one deck filler.
Spray thrower described in the utility model, packing layer, demister, aerator, circulating pump, cyclone, centrifuge, drier all select for use matured product to assemble.
The device that utilizes the utility model to provide come desulfurization have desulfuration efficiency height, liquid-gas ratio low, be not easy to produce that fouling is stopped up, the ammonium sulfate carried secretly in the outlet flue gas and advantage such as droplet content is low, the byproduct quality is good.
The utility model provides the new device that utilizes ammoniacal liquor to remove sulfur dioxide in flue gas to comprise a kind of novel absorption tower, this novel absorption tower adopts hollow-spraying-tower and filler to carry out reasonable combination, and pot strainer is set outside tower, unsaturated ammonium sulfate after the filtration is the absorption liquid of packing layer, thoroughly removes the possibility that the filler fouling is stopped up.
Description of drawings
Fig. 1 is the utility model device and process flow diagram.
The specific embodiment
The utility model is that a kind of employing hollow-spraying-tower and filler absorption combine, and the apparatus and method of the ammonia process of desulfurization of use pot strainer ash disposal, as shown in Figure 1, flue gas enters absorption tower 6 by adsorption tower smoke inlet 1, flue gas rises in absorption tower 6, slurries counter current contacting with spraying layer 2 sprays, the generation mass transfer absorbs, sulfur dioxide in flue gas, sulfur trioxide, hydrogen chloride, pollutant major parts such as hydrogen fluoride are absorbed, dust major part in the flue gas is washed, simultaneously high-temperature flue gas is also by saturated cooling, and through spraying layer 2 washing dusts, and the flue gas after the saturated cooling passes spraying layer 2 and enters packing layer 3, flue gas absorbs with filling surface absorption liquid generation mass transfer in packing layer 3, continue upwards by demister 4, except that the droplet of deentrainment, by 5 discharges of cat head exhanst gas outlet after meeting the requirements of desulfuration efficiency.
The absorption liquid of spraying layer and packing layer descends to finally all compiling under the gravity effect in tower and absorbs Tata prime cement pond 7, the slurries that absorb in the Tata prime cement pond 7 are got to spraying layer 2 circulated sprinklings by circulating pump 9, slurries are in the process that circulated sprinkling absorbs, concentration constantly rises, add that high-temperature flue gas constantly evaporates the moisture in the sprayed slurry, the feasible slurries condensing crystallizing that absorbs in the Tata prime cement pond 7 is separated out ammonia sulfate crystal.
Absorb in the slurries in the Tata prime cement pond 7, there are multiple materials such as ammonium sulfate, ammonium sulfite, ammonium hydrogen sulfate, ammonium bisulfite, in order to obtain highly purified ammonium sulfate fertilizer product, blast air by absorbing the aeration tube 8 that is provided with in the Tata prime cement pond 7, make ammonium sulfite, ammonium bisulfite be oxidized to ammonium sulfate, ammonium hydrogen sulfate; Feed ammoniacal liquor or gas ammonia by this aeration tube 8 simultaneously, the pH value of regulating slurries is 5-6, makes ammonium hydrogen sulfate, ammonium bisulfite be converted into ammonium sulfate, ammonium sulfite.
The slurries suspended solids content that absorbs in the Tata prime cement pond 7 reaches at 5% o'clock, with excavationg pump 10 slurries are got to cyclone 11 and carry out Separation of Solid and Liquid, overflow after the Separation of Solid and Liquid enters filtrate box 14 and collects, the underflow of carrying after dense enters centrifuge 12 further centrifugal dehydrations, ammonium sulfate moisture content behind centrifuge dewatering is less than 5%, enter drier 13 then and carry out drying, the ammonium sulfate fertilizer product that final production goes out to meet the demands.
Contain a large amount of dusts and a spot of ammonium sulfate crystallization in the filtrate of the overflow of cyclone 11 and centrifuge 12, therefore, dissolve ammonia sulfate crystal by in filtrate box, adding low amounts of water, make that the filtrate in the filtrate box becomes the unsaturated ammonium sulfate that concentration is 30%-40%.With filtrate pump 15 unsaturated solution that this contains dust is squeezed into pot strainer, the diameter that suspends in the solution dust greater than 1 μ m is all filtered out, the stillness of night after the filtration is got to absorption tower packing layer 3 as absorption liquid by clear liquid pump 17, because absorption liquid is dust free unsaturated ammonium sulfate, has solved packing layer fouling blocking problem effectively.
Embodiment 1
As shown in Figure 1, a kind of ammonia process of desulfurization absorption tower 6, circulating pump 9, excavationg pump 10, cyclone 11, centrifuge 12, drier 13, filtrate box 14, filtration liquid pump 15, pot strainer 16, clear liquid pump 17, the tower prime cement pond 7, spraying layer 2, packing layer 3, the demister 4 that comprise the absorption tower from the bottom to top, wherein spraying layer 2 comprises 2 layers of spray thrower, and packing layer 3 is one deck filler; The middle part, absorption tower is positioned at the below of spraying layer 2, the top in tower prime cement pond 7 is provided with smoke inlet 1, and the top, absorption tower is provided with exhanst gas outlet 5; The tower prime cement pond 7 on described absorption tower is provided with aeration tube 8; Absorption tower 6 is outside equipped with 2 circulating pumps 9, and the outlet of every circulating pump 9 links to each other with spray thrower in one deck spraying layer 2 respectively, and demister 4 is installed in top, absorption tower, and the import of every circulating pump 9 links to each other with the tower prime cement pond 7 on absorption tower respectively; , the bottom in 6 tower prime cement pond 7 links to each other with excavationg pump 10 imports on the absorption tower, and the outlet of excavationg pump 10 links to each other with the import of cyclone 11; The underflow pipe 19 of described cyclone 11 links to each other with centrifuge 12 imports; The overflow pipe 18 of described cyclone 11 links to each other with the filtrate pipe 20 of described centrifuge 12 and converges the back and links to each other with the top of filtrate box 14; The discharge nozzle 21 of described centrifuge 12 links to each other with drier 13 imports; Described filtrate box 14 links to each other with pot strainer 16 by filtrate pump 15, and wherein the import of filtrate pump 15 links to each other with the bottom of filtrate box 14, and the outlet of filtrate pump 15 links to each other with the import of pot strainer 16; The outlet of described pot strainer 16 is provided with clear liquid pump 17, and wherein the import of clear liquid pump 17 links to each other with the outlet of pot strainer 16, and the outlet of clear liquid pump 17 links to each other with the packing layer 3 on absorption tower 6.
Embodiment 2
Remainder is identical with embodiment 1, difference is that absorption tower spraying layer 2 comprises the spray thrower that haves three layers, corresponding with it is, outer corresponding 3 circulating pumps 9 that are provided with of tower, the outlet of every circulating pump 9 links to each other with every layer of spray thrower in the spraying layer 2 respectively, and the import of every circulating pump 9 links to each other with the tower prime cement pond 7 on absorption tower respectively.
Embodiment 3
From the temperature of boiler is 130 ℃ flue gas, and flow is 8.0 * 10
5Standard cubic meter/hour, sulfur dioxide in flue gas concentration is 2800mg/Nm
3, dust content is 100mg/Nm
3This flue gas enters absorption tower 6 from adsorption tower smoke inlet 1, flue gas rises in absorption tower 6, slurries counter current contacting with spraying layer 2 sprays, mass transfer takes place to be absorbed and the heat transmission, moisture in the high-temperature flue gas evaporation slurries, flue gas is saturated rapidly simultaneously is cooled to 50-55 ℃, and sulfur dioxide in flue gas 60%-70% is absorbed, and the slurries that dust 75%-80% is sprayed wash.Flue gas after the cooling dedusting continues to rise by spraying layer, enter packing layer 3, flue gas fully contacts with the absorption liquid of filling surface, the absorption liquid on packing layer 3 surfaces is the clear liquids after filtering from pot strainer 16, be that a kind of concentration is 30%-40%, dust free unsaturated ammonium sulfate, get to packing layer by clear liquid pump 17, flue gas is by behind the packing layer 3, most sulfur dioxide are absorbed and remove in the flue gas, and simultaneously the flue gas fine droplets of carrying secretly from spraying layer and the thin ammonium sulfate of dimension of generation also are absorbed a washing part packing layer; Flue gas is by behind the packing layer, enter the demister 4 on 6 tops, absorption tower, most drops of carrying secretly in the flue gas are tackled by demister, and the exhanst gas outlet 5 at last clean flue gas 6 tops from the absorption tower is discharged, and the sulfur dioxide concentration in the clean flue gas of discharge is 110mg/Nm
3, dust content is 20mg/Nm
3
Absorption liquid in the absorption tower 6 is because the gravity effect all falls into tower prime cement pond 7 at last, because the moisture in the slurries is constantly evaporated by high-temperature flue gas, slurries utilize the heat of flue gas to concentrate, and concentration of slurry constantly increases in the tower prime cement pond 7.After slurries absorbed sulfur dioxide, the ammonium sulfite in the slurries became ammonium bisulfite, and PH reduces, and absorbability weakens, and is injected to the concentrated ammonia liquor 6.3m of mass concentration 20% again by the aeration tube 8 in the tower prime cement pond 7
3/ h, the pH value of regulating slurries is 5-6, makes ammonium bisulfite in the slurries, ammonium hydrogen sulfate be converted into ammonium sulfite, ammonium sulfate.Blasting air from aeration tube 8 simultaneously, is ammonium sulfate with sulfite oxidation; Along with ammonium sulfate concentrations in the slurries constantly increases, final saturated crystallization is separated out ammonia sulfate crystal.
When the slurries suspended sediment concentration in the tower prime cement pond 7 reaches 10% left and right sides, to get to cyclone 11 by excavationg pump 10 and carry out Separation of Solid and Liquid, the overflowing liquid after the separation flows into filtrate box 14 from cyclone 11 overflow pipes 18; Cyclone underflow suspended sediment concentration is about 40%, and underflow flows into centrifuge 12 by underflow pipe 19 and further dewaters.
Filtrate after centrifuge 12 dehydration also flows into filtrate box 14 by filtrate pipe, and the thick product moisture content of the ammonium sulfate after the centrifugal filtration is below 5%, and the discharge nozzle 21 by centrifuge 12 enters drier 13.The thick product of ammonium sulfate is lower than 1% at drier inner drying to moisture content, and the standard of the certified products that are up to state standards is sold as agrochemical.
The filtrate of the overflowing liquid of cyclone 11 and centrifuge 12 is pooled to filtrate box 14, by add an amount of water in filtrate box 14, dissolves a spot of ammonium sulfate crystallization, and making filtrate become concentration is 40% ammonium sulfate.This ammonium sulfate is by filtrate pump 15, squeeze into pot strainer 16, the dust of diameter in the solution greater than 1 μ m all filtered out, the stillness of night after the filtration is got to absorption tower packing layer 3 as absorption liquid by clear liquid pump 17, because absorption liquid is dust free unsaturated solution, has solved packing layer fouling blocking problem effectively.
Embodiment 4
The flow process of embodiment 4 and embodiment 3 are identical, and different is that flue gas is from the steel works sintering machine, and temperature is 120 ℃, and flue gas flow is 1.6 * 10
6Standard cubic meter/hour, sulfur dioxide in flue gas concentration is 1300mg/Nm
3, dust content is 100mg/Nm
3
By the sulfur dioxide concentration in the clean flue gas of discharging after 6 desulfurization of absorption tower is 65mg/Nm
3, dust content is 20mg/Nm
3
Embodiment 5
The flow process of embodiment 5 and embodiment 3 are identical, different is regulates slurries PH in the tower prime cement pond 7, and what inject by aeration tube 8 is pure gas ammonia, and flow is 1200kg/h, the pH value of regulating slurries is 5-6, makes ammonium bisulfite in the slurries, ammonium hydrogen sulfate be converted into ammonium sulfite, ammonium sulfate.
Claims (3)
1. utilize ammoniacal liquor to remove the device of sulfur dioxide in flue gas, comprise absorption tower and circulating pump, it is characterized in that: described absorption tower comprises tower prime cement pond, spraying layer, packing layer, the demister on absorption tower from the bottom to top, the middle part, absorption tower is positioned at the below of spraying layer, the top in tower prime cement pond is provided with smoke inlet, and the top, absorption tower is provided with exhanst gas outlet; Be provided with aeration tube in the tower prime cement pond on described absorption tower; The absorption tower is outside equipped with circulating pump, and the quantity of circulating pump is consistent with the number of plies of spraying layer, every outlet of circulating pump links to each other with spray thrower in one deck spraying layer respectively, and demister is installed in top, absorption tower, and every inlet of circulating pump links to each other with the tower prime cement pond on absorption tower respectively.
2. the device that utilizes ammoniacal liquor to remove sulfur dioxide in flue gas according to claim 1, it is characterized in that: also comprise excavationg pump, cyclone, centrifuge, drier, filtrate box, filtration liquid pump, pot strainer, clear liquid pump, bottom in the tower prime cement pond on absorption tower links to each other with the excavationg pump import, discharges delivery side of pump and links to each other with the import of cyclone; The underflow pipe of described cyclone links to each other with the centrifuge import; The overflow pipe of described cyclone links to each other with the filtrate pipe of described centrifuge and converges the back and links to each other with the top of filtrate box; The discharge nozzle of described centrifuge links to each other with the drier import; Described filtrate box links to each other with pot strainer by filtrate pump, and wherein the import of filtrate pump links to each other with the bottom of filtrate box, and the filtrate delivery side of pump links to each other with the import of pot strainer; The outlet of described pot strainer is provided with clear liquid pump, and wherein the import of clear liquid pump links to each other with the outlet of pot strainer, and the clear liquid delivery side of pump links to each other with the packing layer on absorption tower.
3. the device that utilizes ammoniacal liquor to remove sulfur dioxide in flue gas according to claim 1 is characterized in that: described spray thrower is formed by connecting by connection pipe and shower nozzle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202922345U CN201664576U (en) | 2010-08-16 | 2010-08-16 | Apparatus for removing sulfur dioxide in flue gas by ammonia water |
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| CN2010202922345U CN201664576U (en) | 2010-08-16 | 2010-08-16 | Apparatus for removing sulfur dioxide in flue gas by ammonia water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898082A (en) * | 2010-08-16 | 2010-12-01 | 殷茵 | Device and method for depriving sulfur dioxide in flue gas by using ammonia water |
| CN103115426A (en) * | 2013-02-27 | 2013-05-22 | 苏州大学 | Waste heat utilization and dust removal device for coal-fired facility |
| CN104548918A (en) * | 2015-01-14 | 2015-04-29 | 江苏揽山环境科技有限公司 | Process and system for reducing particle content after flue gas desulfurization |
| CN105056679A (en) * | 2015-08-11 | 2015-11-18 | 中国五环工程有限公司 | Method and device for removing PM2.5 (particulate matter) in WFGD (wet flue gas desulfurization) process |
-
2010
- 2010-08-16 CN CN2010202922345U patent/CN201664576U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898082A (en) * | 2010-08-16 | 2010-12-01 | 殷茵 | Device and method for depriving sulfur dioxide in flue gas by using ammonia water |
| CN101898082B (en) * | 2010-08-16 | 2012-02-22 | 武汉兴能环保技术有限公司 | Device and method for depriving sulfur dioxide in flue gas by using ammonia water |
| CN103115426A (en) * | 2013-02-27 | 2013-05-22 | 苏州大学 | Waste heat utilization and dust removal device for coal-fired facility |
| CN103115426B (en) * | 2013-02-27 | 2015-06-17 | 苏州大学 | Waste heat utilization and dust removal device for coal-fired facility |
| CN104548918A (en) * | 2015-01-14 | 2015-04-29 | 江苏揽山环境科技有限公司 | Process and system for reducing particle content after flue gas desulfurization |
| CN105056679A (en) * | 2015-08-11 | 2015-11-18 | 中国五环工程有限公司 | Method and device for removing PM2.5 (particulate matter) in WFGD (wet flue gas desulfurization) process |
| CN105056679B (en) * | 2015-08-11 | 2017-03-01 | 中国五环工程有限公司 | PM in process of wet desulphurization2.5Removal methods and its device |
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Granted publication date: 20101208 Termination date: 20130816 |