CN101716463B - Simultaneous removing device and method of various pollutants by electrocatalytical oxidation combining lime-gypsum method - Google Patents
Simultaneous removing device and method of various pollutants by electrocatalytical oxidation combining lime-gypsum method Download PDFInfo
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- CN101716463B CN101716463B CN2010100395050A CN201010039505A CN101716463B CN 101716463 B CN101716463 B CN 101716463B CN 2010100395050 A CN2010100395050 A CN 2010100395050A CN 201010039505 A CN201010039505 A CN 201010039505A CN 101716463 B CN101716463 B CN 101716463B
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Abstract
The invention discloses simultaneous removing device and method of various pollutants by an electrocatalytical oxidation combining lime-gypsum method. The device comprises a spraying and cooling device, an electrostatic enhancement reactor, a Venturi device, a double-circulation integrated absorption tower of various pollutants and a wet type electrostatic defroster, wherein after smoke is cooled by the spraying and cooling device, the smoke enters the electrostatic enhancement reactor and is subjected to corona discharge processing in a corona discharge area formed in the electrostatic enhancement reactor; the processed smoke enters the double-circulation integrated absorption tower of various pollutants and is sprayed to remove dust and absorb in the absorption tower; and the purified smoke sequentially enters a corrugated plate defroster and the electrostatic defroster on the upper part of a spraying tower so as to remove aerosol in the smoke. The invention has the advantages that various pollutants can be simultaneously removed, and meanwhile, the pollution of fine granules and the aerosol can be effectively controlled; various pollutants can have higher removal efficiency; and the removal and the absorption of by-products cannot cause secondary pollution to environment.
Description
Technical field
The invention belongs to environmental technology field, the multiple pollutant that relates in particular to a kind of catalytic oxidation associating lime-gypsum method removes device and method simultaneously.
Background technology
At present both at home and abroad for the coal-fired flue-gas sulphur oxide, nitrogen oxide, the control device of pollutants such as polycyclic aromatic hydrocarbon He bioxin is general to adopt different equipment and methods to administer respectively.The major control technology of oxysulfide is desulfurization method of limestone-gypsum technology and semi-dry desulphurization technology both at home and abroad.Wherein the desulfurization method of limestone-gypsum technology exists investment big, and operating cost is higher, and desulfurizing byproduct is difficult to shortcomings such as recycling; And the semi-dry desulphurization technology is general poor to the adaptability of sulphur coal, and is mainly used in the power plant and the desulfurization of cogeneration of heat and power boiler exhaust gas of the following unit of 300MW.
The major technique that removes nitrogen oxide in the flue gas both at home and abroad is selective catalytic reduction (SCR) and SNCR method (SNCR).But SCR and SNCR remove the equipment that nitrogen oxide all need be installed expensive.As in the installation of SCR equipment, the expense of its catalyst accounts for 35% of gross investment, and the general device operation need be with the catalyst that renews after 2～3 years, and operating cost is very high.These two kinds of technologies are used less in developing country.
For mercury metal, polycyclic aromatic hydrocarbon does not also have ripe technology with the improvement of dioxins materials is in the starting stage both at home and abroad, mostly is to adopt active carbon adsorption to remove.Product after the charcoal absorption belongs to dangerous solid waste, possibly cause secondary pollution.In addition, the processing cost of the dangerous solid waste of this type also is quite expensive.
Up to now, also there is not a technology can remove the oxysulfide in the flue gas simultaneously, nitrogen oxide, polycyclic aromatic hydrocarbon is with these four kinds of pollutants of bioxin.After getting into the nineties, people begin to recognize gradually all contaminations are administered respectively that not only floor space is big, and investment cost is high.In order to reduce the expense of gas cleaning, adapt to the needs of existing power plant, exploitation can remove the new technology of multiple pollutant and the development trend that new equipment has become flue gases purification simultaneously.
A kind of flue gases purification that adopts catalytic oxidation associating lime-gypsum method to absorb can remove the oxysulfide in the flue gas simultaneously, nitrogen oxide, and mercury metal, polycyclic aromatic hydrocarbon is with these four kinds of pollutants of bioxin.Its principle is to utilize the uncontamination things such as steam and oxygen in the flue gas to generate the source as free radical, under the effect in corona zone, is broken down into O, OH, O
3, HO
2Deng oxidative free radical, with the SO in the flue gas
2, NOx, Hg
0, polycyclic aromatic hydrocarbon is with the bioxin reaction generates SO
3, H
2SO
4, NO
2, HNO
3, divalence mercury, CO
2And H
2O, these product are absorbed in follow-up lime-gypsum method technology, thereby remove when realizing multiple pollutant.
Summary of the invention
The objective of the invention is not remove the oxysulfide in the flue gas simultaneously to having at present; Nitrogen oxide; Mercury metal, polycyclic aromatic hydrocarbon is with the technological gap of bioxin provides a kind of multiple pollutant of catalytic oxidation associating lime-gypsum method to remove device and method simultaneously.
The multiple pollutant of catalytic oxidation associating lime-gypsum method removes device simultaneously and comprises booster fan, mist cooling device, static enhancing reactor, Venturi, the integrated absorption tower of the multiple pollutant of two circulation, wet electrostatic demister, technology water pot, technology water pump, lime slurry case, lime white liquid pump, lime slurry circulating box, lime slurry circulating pump, sedimentation basin, grey water-circulating pump, oxidation fan, and fresh water (FW) is delivered to mist cooling device, lime slurry case, wet electrostatic demister and upper strata, the integrated absorption tower of the multiple pollutant of two circulation demister by the technology water pot through the technology water pump; Flue gas gets into the mist cooling device behind the fresh water (FW) spraying cooling through booster fan; Corona discharge Treatment through the static enhancing reactor; Its air is carried by oxidation fan, after the integrated absorption towers of the two multiple pollutants of circulation of Venturi entering, flue gas is after grey water-circulating pump spray for dust suppression and spray absorption processing in the integrated absorption tower of the multiple pollutant of two circulations; Flue gas gets into the wet electrostatic demister, and the back is discharged by chimney; Buck behind the spray and all get into sedimentation basin through the fresh water (FW) of mist cooling device; Lime slurry gets into the lime slurry circulating box by the lime slurry case through the lime white liquid pump, handles after the integrated absorption towers of the two multiple pollutants of circulation of lime slurry circulating pump entering spray to absorb to flue gas.
The static enhancing reactor is a rectangle structure; Comprise seal, upper chamber, injector electrode, corona discharging area, pole plate, mixing chamber, oxidation fan interface, air distribution plate, lower chamber; Be provided with upper chamber, corona discharging area, mixing chamber, lower chamber in the static enhancing reactor from top to bottom; Corona discharging area is divided into a plurality of corona discharges unit, and each corona discharge unit is separated by pole plate, and injector electrode is arranged side by side in each corona discharge unit; Injector electrode is placed perpendicular to pole plate; Be provided with air distribution plate between mixing chamber and the lower chamber, the static enhancing reactor housing in mixing chamber zone is provided with the oxidation fan interface, and static enhancing reactor top is provided with seal.
The integrated absorption tower of the multiple pollutant of two circulations comprises absorption tower inlet, buck storage tank, buck spraying layer, lime slurry storage tank, lime slurry spraying layer, corrugated plating demister; Two-piece design is adopted on the integrated absorption tower of the multiple pollutant of two circulations; Bottom, the integrated absorption tower of the multiple pollutant of two circulations is buck storage tank and buck spraying layer; Top is lime slurry storage tank and lime slurry spraying layer; The lime slurry spraying layer is 2～4 layers of spray structure; Top, the integrated absorption tower of the multiple pollutant of two circulations is the corrugated plating demister, and flue gas gets into the integrated absorption tower of two multiple pollutants of circulation by the absorption tower inlet, combines spray for dust suppression through the buck spraying layer with Venturi earlier; The back gets into the lime slurry spraying layer through lime slurry hollow-spraying-tower desulphurization denitration, after discharge the integrated absorption tower of two multiple pollutants of circulation after the demist of corrugated plating demister.
The multiple pollutant of catalytic oxidation associating lime-gypsum method removal methods simultaneously is: flue gas gets into the mist cooling device, and with adjustment to 70～80 of flue gas ℃, flue gas gets into lower chamber from static enhancing reactor bottom; Flue gas has a buffering in lower chamber, on the top of lower chamber air distribution plate is arranged, and air distribution plate top is mixing chamber; The oxidation air that replenishes can add in mixing chamber also and flue gas evenly mixes, and the top of mixing chamber is corona discharging area, and corona discharging area is divided into a plurality of corona discharges unit according to the flue gas process lot size; Each corona discharge unit is separated by pole plate, a plurality of injector electrode that is arranged side by side in each corona discharge unit, and injector electrode quantity is adjustable according to actual exhaust gas volumn; The discharge injector electrode is placed perpendicular to pole plate; Corona discharge reactor uses 20kV～50kV dc high-voltage, and injector electrode connects positive high voltage, and pole plate connects negative high voltage; The top of corona discharging area is upper chamber and exhanst gas outlet; Flue gas through the upper chamber buffering flows out the integrated absorption tower of the two multiple pollutants of circulation of entering from outlet, and bottom, the integrated absorption tower of the multiple pollutant of two circulations is buck storage tank and buck spraying layer, and buck constantly is transported to the buck spraying layer by sedimentation basin and combines with Venturi flue gas is carried out spray for dust suppression under the effect of grey water-circulating pump; Top, the integrated absorption tower of the multiple pollutant of two circulations is equipped with 2～4 layers of lime slurry spraying layer and lime slurry storage tank; By the lime slurry circulating pump constantly be transported to lime slurry spraying layer and the abundant haptoreaction of upstream flue gas, flue gas sprayed absorb the multiple pollutant of removing flue gas; The spray liquid-gas ratio is 8～20, and the system outlet soot emissions are less than 30mg/m
3SO
2Discharging is less than 200mg/m
3, and system's desulfuration efficiency is not less than 96%; The NO concentration of emission is less than 150mg/m
3, and system's denitration efficiency is not less than 60%, the slurries circulation separation of top and the bottom, the integrated absorption tower of the multiple pollutant of two circulations; Flue gas after being purified gets into the corrugated plating demister on two circulations top, the integrated absorption tower of multiple pollutant, and the aerosol amount in the flue gas after the demist of corrugated plating demister is less than 100mg/m
3, the aerosol amount was less than 30mg/m after flue gas passed through the further demist of wet electrostatic demister again
3, after chimney is discharged.
The beneficial effect that the present invention compared with prior art has:
1) can realize multiple pollutant, like oxysulfide, nitrogen oxide removes in the time of polycyclic aromatic hydrocarbon and bioxin, for cost of investment, simple and reliable process have been saved in the improvement of flue gas greatly;
2) removal efficiency of pollutant is high; The removal efficiency of its sulphur oxide can reach more than 95%; The removal efficiency of nitrogen oxide can reach more than 60%, and the removal efficiency of mercury metal can reach more than 80%, and the removal efficiency of polycyclic aromatic hydrocarbon and dioxins materials can reach more than 80%;
3) this device removes accessory substance and can not cause secondary pollution to environment;
4) this device can effectively be controlled fine particle (PM
2.5) and aerocolloidal pollution.
Description of drawings
The multiple pollutant of Fig. 1 catalytic oxidation associating lime-gypsum method removes the device and method structural representation simultaneously;
Fig. 2 static enhancing reactor of the present invention structural representation;
The integrated absorption tower of Fig. 3 two multiple pollutants of circulation of the present invention structural representation;
Among the figure: booster fan 1; Mist cooling device 2; Static enhancing reactor 3; Venturi 4; The integrated absorption tower 5 of the multiple pollutant of two circulations; Wet electrostatic demister 6; Technology water pot 7; Technology water pump 8; Lime slurry case 9; Lime white liquid pump 10; Lime slurry circulating box 11; Lime slurry circulating pump 12; Sedimentation basin 13; Ash water-circulating pump 14; Oxidation fan 15; Seal 16; Upper chamber 17; Injector electrode 18; Corona discharging area 19; Dividing plate 20; Mixing chamber 21; Oxidation fan interface 22; Air distribution plate 23; Lower chamber 24; Absorption tower inlet 25; Buck storage tank 26; Buck spraying layer 27; Lime slurry storage tank 28; Lime slurry spraying layer 29; Corrugated plating demister 30.
The specific embodiment
As shown in Figure 1; The multiple pollutant of catalytic oxidation associating lime-gypsum method removes device simultaneously and comprises the integrated absorption tower of booster fan 1, mist cooling device 2, static enhancing reactor 3, Venturi 4, the multiple pollutant of two circulation 5, wet electrostatic demister 6, technology water pot 7, technology water pump 8, lime slurry case 9, lime white liquid pump 10, lime slurry circulating box 11, lime slurry circulating pump 12, sedimentation basin 13, grey water-circulating pump 14, oxidation fan 15, and fresh water (FW) is delivered to the integrated absorption tower of mist cooling device 2, lime slurry case 9, wet electrostatic demister 6 and the multiple pollutant of two circulation 5 upper strata demisters by technology water pot 7 through technology water pump 8; Flue gas gets into mist cooling device 2 behind the fresh water (FW) spraying cooling through booster fan 1; Corona discharge Treatment through static enhancing reactor 3; Its air is by oxidation fan 15 conveyings, after the integrated absorption towers 5 of the two multiple pollutants of circulation of Venturi 4 entering, flue gas is after grey water-circulating pump 14 spray for dust suppression and spray absorption processing in the integrated absorption tower 5 of the multiple pollutant of two circulations; Flue gas gets into wet electrostatic demister 6, and the back is discharged by chimney; Buck behind the spray and all get into sedimentation basin 13 through the fresh water (FW) of mist cooling device 2; Lime slurry gets into lime slurry circulating box 11 by lime slurry case 9 through lime white liquid pump 10, handles after the 5 pairs of flue gases in lime slurry circulating pump 12 entering two circulation integrated absorption towers of multiple pollutant spray to absorb.
As shown in Figure 2; Static enhancing reactor 3 is rectangle structures; Comprise seal 16, upper chamber 17, injector electrode 18, corona discharging area 19, pole plate 20, mixing chamber 21, oxidation fan interface 22, air distribution plate 23, lower chamber 24, be provided with upper chamber 17, corona discharging area 19, mixing chamber 21, lower chamber 24 in the static enhancing reactor 3 from top to bottom, corona discharging area 19 is divided into a plurality of corona discharges unit; Each corona discharge unit is separated by pole plate 20; The injector electrode 18 that is arranged side by side in each corona discharge unit, injector electrode 18 is placed perpendicular to pole plate 20, is provided with air distribution plate 23 between mixing chamber 21 and the lower chamber 24; Static enhancing reactor 3 housings in mixing chamber 21 zones are provided with oxidation fan interface 22, and static enhancing reactor 3 tops are provided with seal 16.The static enhancing reactor adopts free radical shower patented technology, through the free radical of positive corona generation strong oxidizing property, the materials such as NO2, HNO3 and HNO2 that the NO in the oxidation flue gas becomes to be easy to absorb.
As shown in Figure 3; The integrated absorption tower 5 of the multiple pollutant of two circulations comprises absorption tower inlet 25, buck storage tank 26, buck spraying layer 27, lime slurry storage tank 28, lime slurry spraying layer 29, corrugated plating demister 30; Two-piece design is adopted on the integrated absorption tower 5 of the multiple pollutant of two circulations, and dedusting and desulphurization denitration segmentation are implemented.5 bottoms, the integrated absorption tower of the multiple pollutant of two circulations are buck storage tank 26 and buck spraying layer 27; Combine to carry out spray for dust suppression with Venturi 4; Realize dust removing effects, top is lime slurry storage tank 28 and lime slurry spraying layer 29, and lime slurry spraying layer 29 is 2～4 layers of spray structure; Adopt lime slurry to carry out the hollow-spraying-tower desulphurization denitration, realize the desulphurization denitration function.5 tops, the integrated absorption tower of the multiple pollutant of two circulations are corrugated plating demister 30; Flue gas gets into the integrated absorption tower 5 of two multiple pollutants of circulation by absorption tower inlet 25; Earlier combine spray for dust suppression with Venturi 4 through buck spraying layer 27; The back gets into lime slurry spraying layer 29 through lime slurry hollow-spraying-tower desulphurization denitration, after discharge the integrated absorption tower 5 of two multiple pollutants of circulation after 30 demists of corrugated plating demister.The water circulation of top and the bottom, the integrated absorption tower of the multiple pollutant of two circulations separates, and can solve the blockage problem of absorption tower internal unit.
The multiple pollutant of catalytic oxidation associating lime-gypsum method removal methods simultaneously is: flue gas gets into mist cooling device 2, and with adjustment to 70～80 of flue gas ℃, flue gas gets into lower chamber 24 from static enhancing reactor 3 bottoms; Flue gas has a buffering in lower chamber 24, on the top of lower chamber 24 air distribution plate 23 is arranged, and air distribution plate 23 tops are mixing chambers 21; The oxidation air that replenishes can add in mixing chamber 21 also and flue gas evenly mixes, and the top of mixing chamber 21 is corona discharging areas 19, and corona discharging area 19 is divided into a plurality of corona discharges unit according to the flue gas process lot size; Each corona discharge unit is separated by pole plate 20, and pole plate 20 spacings adopt 80～120mm, and a plurality of injector electrode 18 is arranged side by side in each corona discharge unit; Injector electrode quantity is adjustable according to actual exhaust gas volumn; The discharge injector electrode is placed perpendicular to pole plate, and corona discharge reactor uses 20kV～50kV dc high-voltage, and injector electrode 18 connects positive high voltage; Pole plate connects negative high voltage; After the energized, 20 on injector electrode 18 and pole plate form strong corona discharges, so from the wet flue gas of nozzle ejection static enhancing reactor 3, be broken down into have strong oxidizing property free radical (like O; OH, O
3, HO
2Deng).SO in these free radical materials ability the efficient oxidation flue gases
2Be SO
3And H
2SO
4Deng, oxidation of NOx is NO
2And HNO
3Deng, oxidation Hg
0Become divalence mercury, degrading polycyclic aromatic hydrocarbons is with bioxin is that innocuous substance is (like CO
2, H
2O etc.).The top of corona discharging area 19 is upper chamber 17 and exhanst gas outlet; Flue gas through upper chamber 17 bufferings flows out the integrated absorption tower 5 of the two multiple pollutants of circulation of entering from outlet; 5 bottoms, the integrated absorption tower of the multiple pollutant of two circulations are buck storage tank 26 and buck spraying layer 27; Buck constantly is transported to buck spraying layer 27 by sedimentation basin 13 and combines flue gas is carried out spray for dust suppression with Venturi 4 under the effect of grey water-circulating pump 14; 5 tops, the integrated absorption tower of the multiple pollutant of two circulations are equipped with 2～4 layers of lime slurry spraying layer 29 and lime slurry storage tank 28; By lime slurry circulating pump 12 constantly be transported to lime slurry spraying layer 29 and the abundant haptoreaction of upstream flue gas, flue gas sprayed absorb the multiple pollutant of removing flue gas; The spray liquid-gas ratio is 8～20, and the system outlet soot emissions are less than 30mg/m
3SO
2Discharging is less than 200mg/m
3, and system's desulfuration efficiency is not less than 96%; The NO concentration of emission is less than 150mg/m
3, and system's denitration efficiency is not less than 60%, and the slurries circulation of 5 top and the bottom, the integrated absorption tower of the multiple pollutant of two circulations separates, and can solve the blockage problem of absorption tower internal unit; Flue gas after being purified gets into the corrugated plating demister 30 on two circulations 5 tops, the integrated absorption tower of multiple pollutant; Aerosol amount in the flue gas after 30 demists of corrugated plating demister is less than 100mg/m3; Flue gas is again through wet electrostatic demister 6; Wet electrostatic demister 6 can efficiently capture acid mist that comes out in the absorption tower and the flue dust that does not capture, and solves the etching problem of wet absorption tower afterbody, and further improves dust removing effects; The aerosol amount is less than 30mg/m3, after chimney is discharged after the further demist of wet electrostatic demister.
Claims (3)
1. the multiple pollutant of a catalytic oxidation associating lime-gypsum method removes device simultaneously; It is characterized in that comprising booster fan (1), mist cooling device (2), static enhancing reactor (3), Venturi (4), the integrated absorption tower of the multiple pollutant of two circulation (5), wet electrostatic demister (6), technology water pot (7), technology water pump (8), lime slurry case (9), lime white liquid pump (10), lime slurry circulating box (11), lime slurry circulating pump (12), sedimentation basin (13), grey water-circulating pump (14), oxidation fan (15), fresh water (FW) is delivered to mist cooling device (2), lime slurry case (9), wet electrostatic demister (6) and upper strata, the integrated absorption tower of the multiple pollutant of two circulation (5) demister by technology water pot (7) through technology water pump (8); Flue gas gets into mist cooling device (2) behind the fresh water (FW) spraying cooling through booster fan (1); Corona discharge Treatment through static enhancing reactor (3); Its air is by oxidation fan (15) conveying, after the two circulation of Venturi (4) the entering integrated absorption towers of multiple pollutant (5), flue gas is after grey water-circulating pump (14) spray for dust suppression and spray absorption processing in the integrated absorption tower of the multiple pollutant of two circulations (5); Flue gas gets into wet electrostatic demister (6), and the back is discharged by chimney; Buck behind the spray and all get into sedimentation basin (13) through the fresh water (FW) of mist cooling device (2); Lime slurry gets into lime slurry circulating box (11) by lime slurry case (9) through lime white liquid pump (10), handles after lime slurry circulating pump (12) entering two circulation integrated absorption towers of multiple pollutant (5) spray to absorb to flue gas;
Described static enhancing reactor (3) is a rectangle structure; Comprise seal (16), upper chamber (17), injector electrode (18), corona discharging area (19), pole plate (20), mixing chamber (21), oxidation fan interface (22), air distribution plate (23), lower chamber (24); Be provided with upper chamber (17), corona discharging area (19), mixing chamber (21), lower chamber (24) in the static enhancing reactor (3) from top to bottom; Corona discharging area (19) is divided into a plurality of corona discharges unit; Each corona discharge unit is separated by pole plate (20); The injector electrode (18) that is arranged side by side in each corona discharge unit, injector electrode (18) is placed perpendicular to pole plate (20), is provided with air distribution plate (23) between mixing chamber (21) and the lower chamber (24); Static enhancing reactor (3) housing in mixing chamber (21) zone is provided with oxidation fan interface (22), and static enhancing reactor (3) top is provided with seal (16).
2. the multiple pollutant of a kind of catalytic oxidation associating lime-gypsum method according to claim 1 removes device simultaneously; It is characterized in that described two circulation integrated absorption towers of multiple pollutant (5) comprise absorption tower inlet (25), buck storage tank (26), buck spraying layer (27), lime slurry storage tank (28), lime slurry spraying layer (29), corrugated plating demister (30); Two-piece design is adopted on the integrated absorption tower of the multiple pollutant of two circulations (5); Bottom, the integrated absorption tower of the multiple pollutant of two circulations (5) is buck storage tank (26) and buck spraying layer (27); Top is lime slurry storage tank (28) and lime slurry spraying layer (29); Lime slurry spraying layer (29) is 2～4 layers of spray structure; Top, the integrated absorption tower of the multiple pollutant of two circulations (5) is corrugated plating demister (30), and flue gas gets into two circulations integrated absorption tower of multiple pollutant (5) by absorption tower inlet (25), combines spray for dust suppression through buck spraying layer (27) with Venturi (4) earlier; The back gets into lime slurry spraying layer (29) through lime slurry hollow-spraying-tower desulphurization denitration, after discharge two circulations integrated absorption tower of multiple pollutant (5) after corrugated plating demister (30) demist.
3. the multiple pollutant of catalytic oxidation associating lime-gypsum method removal methods simultaneously is characterized in that flue gas gets into mist cooling device (2), with adjustment to 70～80 of flue gas ℃; Flue gas gets into lower chamber (24) from static enhancing reactor (3) bottom; Flue gas has a buffering in lower chamber (24), on the top of lower chamber (24) air distribution plate (23) is arranged, and air distribution plate (23) top is mixing chamber (21); The oxidation air that replenishes can add in mixing chamber (21) also and flue gas evenly mixes; The top of mixing chamber (21) is corona discharging area (19), and corona discharging area (19) is divided into a plurality of corona discharges unit according to the flue gas process lot size, and each corona discharge unit is separated by pole plate (20); A plurality of injector electrode (18) is arranged side by side in each corona discharge unit; Injector electrode quantity is adjustable according to actual exhaust gas volumn, and the discharge injector electrode is placed perpendicular to pole plate, and corona discharge reactor uses 20kV～50kV dc high-voltage; Injector electrode (18) connects positive high voltage; Pole plate connects negative high voltage, and the top of corona discharging area (19) is upper chamber (17) and exhanst gas outlet, and the flue gas that cushions through upper chamber (17) flows out the two integrated absorption towers of multiple pollutant (5) of circulating of entering from outlet; Bottom, the integrated absorption tower of the multiple pollutant of two circulations (5) is buck storage tank (26) and buck spraying layer (27); Buck constantly is transported to buck spraying layer (27) by sedimentation basin (13) and combines flue gas is carried out spray for dust suppression with Venturi (4) under the effect of grey water-circulating pump (14), top, the integrated absorption tower of the multiple pollutant of two circulations (5) is equipped with 2～4 layers of lime slurry spraying layer (29) and lime slurry storage tank (28), constantly is transported to lime slurry spraying layer (29) by lime slurry circulating pump (12); With the abundant haptoreaction of upstream flue gas; Flue gas is sprayed the multiple pollutant that flue gas is removed in absorption, and the spray liquid-gas ratio is 8～20, and the system outlet soot emissions are less than 30mg/m
3SO
2Discharging is less than 200mg/m
3, and system's desulfuration efficiency is not less than 96%; The NO concentration of emission is less than 150mg/m
3And system's denitration efficiency is not less than 60%; The slurries circulation of top and the bottom, the integrated absorption tower of the multiple pollutant of two circulations (5) separates; Flue gas after being purified gets into the corrugated plating demister (30) on two circulations top, the integrated absorption tower of multiple pollutant (5), and the aerosol amount in the flue gas after corrugated plating demister (30) demist is less than 100mg/m
3, the aerosol amount was less than 30mg/m after flue gas passed through the further demist of wet electrostatic demister (6) again
3, after chimney is discharged.
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| CN2010100395050A CN101716463B (en) | 2010-01-05 | 2010-01-05 | Simultaneous removing device and method of various pollutants by electrocatalytical oxidation combining lime-gypsum method |
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| CN101716463B true CN101716463B (en) | 2012-07-04 |
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