CN101716463A - 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 PDF

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CN101716463A
CN101716463A CN201010039505A CN201010039505A CN101716463A CN 101716463 A CN101716463 A CN 101716463A CN 201010039505 A CN201010039505 A CN 201010039505A CN 201010039505 A CN201010039505 A CN 201010039505A CN 101716463 A CN101716463 A CN 101716463A
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pollutant
flue gas
absorption tower
lime slurry
circulations
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CN201010039505A
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CN101716463B (en
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高翔
骆仲泱
岑可法
倪明江
吴祖良
张涌新
吴卫红
钟毅
施正伦
周劲松
方梦祥
余春江
王树荣
程乐鸣
王勤辉
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浙江大学
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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

The multiple pollutant of catalytic oxidation associating lime-gypsum method removes device and method simultaneously
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 be administered 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 generally 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 removing nitrogen oxide, SCR and SNCR all need to install expensive complex apparatus.As in the installation of SCR equipment, the expense of its catalyst accounts for 35% of gross investment, and general device operation needs 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, may cause secondary pollution.In addition, the processing cost of the dangerous solid waste of this class also is quite expensive.
Up to now, also there is not a technology can remove oxysulfide in the flue gas simultaneously, nitrogen oxide, polycyclic aromatic hydrocarbon is with these four kinds of pollutants of bioxin.After entering the nineties, people begin to recognize gradually all contaminations are administered respectively that not only floor space is big, and the investment cost height.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 uncontamination things such as steam in the flue gas and oxygen 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 at the oxysulfide that can remove simultaneously in the flue gas is not arranged 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, the mist cooling device, the static enhancing reactor, Venturi, the integrated absorption tower of the multiple pollutant of two circulations, the wet electrostatic demister, the technology water pot, the technology water pump, the lime slurry case, the lime white liquid pump, the lime slurry circulating box, the lime slurry circulating pump, sedimentation basin, the ash water-circulating pump, oxidation fan, fresh water (FW) is delivered to the mist cooling device by the technology water pot through the technology water pump, the lime slurry case, wet electrostatic demister and upper strata, the integrated absorption tower of the multiple pollutant of two circulation demister; Flue gas enters the mist cooling device behind the fresh water (FW) spraying cooling through booster fan, Corona discharge Treatment through the static enhancing reactor, wherein air is carried by oxidation fan, after Venturi enters the integrated absorption tower of two multiple pollutants of circulation, 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 enters the wet electrostatic demister, and the back is discharged by chimney; Buck behind the spray and all enter sedimentation basin through the fresh water (FW) of mist cooling device; Lime slurry enters the lime slurry circulating box by the lime slurry case through the lime white liquid pump, after the lime slurry circulating pump enters the integrated absorption tower of two multiple pollutants of circulation flue gas is sprayed the absorption processing.
The static enhancing reactor is a rectangle structure, comprise seal, upper chamber, injector electrode, corona discharging area, pole plate, mixing chamber, the oxidation fan interface, air distribution plate, lower chamber, be provided with upper chamber in the static enhancing reactor from top to bottom, corona discharging area, mixing chamber, lower chamber, corona discharging area is divided into a plurality of corona discharges unit, each corona discharge unit is separated by pole plate, 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 the absorption tower inlet, the buck storage tank, the buck spraying layer, the lime slurry storage tank, the lime slurry spraying layer, the 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, flue gas enters the integrated absorption tower of two multiple pollutants of circulation by the absorption tower inlet, earlier combine spray for dust suppression with Venturi through the buck spraying layer, after enter the lime slurry spraying layer through lime slurry hollow-spraying-tower desulphurization denitration, after discharge the integrated absorption towers 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 enters the mist cooling device, with adjustment to 70~80 of flue gas ℃, flue gas enters lower chamber from static enhancing reactor bottom, flue gas has a buffering in lower chamber, air distribution plate is arranged at the top at lower chamber, air distribution plate top is mixing chamber, the oxidation air that replenishes can add in mixing chamber also and flue gas evenly mixes, the top of mixing chamber is corona discharging area, 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 electrodes 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, corona discharge reactor uses 20kV~50kV dc high-voltage, injector electrode connects positive high voltage, 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 enters the integrated absorption tower of two multiple pollutants of circulation from the outlet outflow, bottom, the integrated absorption tower of the multiple pollutant of two circulations is buck storage tank and buck spraying layer, 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, constantly be transported to the lime slurry spraying layer by the lime slurry circulating pump, with the abundant haptoreaction of upstream flue gas, flue gas is sprayed the multiple pollutant that flue gas is removed in absorption, 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 enters 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, as 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) the removal efficiency height of pollutant, 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 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, fresh water (FW) is delivered to mist cooling device 2 by technology water pot 7 through technology water pump 8, lime slurry case 9, the integrated absorption tower of wet electrostatic demister 6 and the multiple pollutant of two circulation 5 upper strata demisters; Flue gas enters mist cooling device 2 behind the fresh water (FW) spraying cooling through booster fan 1, Corona discharge Treatment through static enhancing reactor 3, wherein air is carried by oxidation fan 15, after Venturi 4 enters the integrated absorption tower 5 of two multiple pollutants of circulation, 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 enters wet electrostatic demister 6, and the back is discharged by chimney; Buck behind the spray and all enter sedimentation basin 13 through the fresh water (FW) of mist cooling device 2; Lime slurry enters lime slurry circulating box 11 by lime slurry case 9 through lime white liquid pump 10, sprays the absorption processing after lime slurry circulating pump 12 enters the 5 pairs of flue gases in two circulation integrated absorption towers of multiple pollutant.
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 in the static enhancing reactor 3 from top to bottom, corona discharging area 19, mixing chamber 21, lower chamber 24, corona discharging area 19 is divided into a plurality of corona discharges unit, each corona discharge unit is separated by pole plate 20, injector electrode 18 is arranged side by side in each corona discharge unit, injector electrode 18 is placed perpendicular to pole plate 20, be 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, by the free radical of positive corona generation strong oxidizing property, materials such as NO2, HNO3 that the NO in the oxidation flue gas becomes to be easy to absorb and HNO2.
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 with Venturi 4 and to carry out spray for dust suppression, realize dust removing effects, 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, 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 enters 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, after enter lime slurry spraying layer 29 through lime slurry hollow-spraying-tower desulphurization denitration, after discharge the integrated absorption towers 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 enters mist cooling device 2, with adjustment to 70~80 of flue gas ℃, flue gas enters 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, 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, the top of mixing chamber 21 is corona discharging areas 19, 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, pole plate 20 spacings adopt 80~120mm, 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, corona discharge reactor uses 20kV~50kV dc high-voltage, injector electrode 18 connects positive high voltage, pole plate connects negative high voltage, after connecting power supply, 20 on injector electrode 18 and pole plate form strong corona discharge, so from the wet flue gas of nozzle ejection static enhancing reactor 3, be broken down into have strong oxidizing property free radical (as O, OH, O 3, HO 2Deng).SO in these free radical materials energy 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 (as 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 enters the integrated absorption tower 5 of two multiple pollutants of circulation from the outlet outflow, 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 with Venturi 4 flue gas is carried out spray for dust suppression 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, constantly be 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, 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 enters 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 by 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, solve the etching problem of wet absorption tower afterbody, and further improve dust removing effects, the aerosol amount is less than 30mg/m3, after chimney is discharged after the further demist of wet electrostatic demister.

Claims (4)

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 circulations (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), ash water-circulating pump (14), oxidation fan (1 5), fresh water (FW) is delivered to mist cooling device (2) by technology water pot (7) through technology water pump (8), lime slurry case (9), wet electrostatic demister (6) and upper strata, the integrated absorption tower of the multiple pollutant of two circulation (5) demister; Flue gas enters mist cooling device (2) behind the fresh water (FW) spraying cooling through booster fan (1), Corona discharge Treatment through static enhancing reactor (3), wherein air is carried by oxidation fan (15), after Venturi (4) enters two circulations integrated absorption tower 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 enters wet electrostatic demister (6), and the back is discharged by chimney; Buck behind the spray and all enter sedimentation basin (13) through the fresh water (FW) of mist cooling device (2); Lime slurry enters lime slurry circulating box (11) by lime slurry case (9) through lime white liquid pump (10), after lime slurry circulating pump (12) enters two circulation integrated absorption towers of multiple pollutant (5) flue gas is sprayed the absorption processing.
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 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) in the static enhancing reactor (3) from top to bottom, corona discharging area (19), mixing chamber (21), lower chamber (24), corona discharging area (19) is divided into a plurality of corona discharges unit, each corona discharge unit is separated by pole plate (20), injector electrode (18) is arranged side by side in each corona discharge unit, injector electrode (18) is placed perpendicular to pole plate (20), be 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).
3. 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), flue gas enters two circulations integrated absorption tower of multiple pollutant (5) by absorption tower inlet (25), earlier combine spray for dust suppression with Venturi (4) through buck spraying layer (27), after enter lime slurry spraying layer (29) through lime slurry hollow-spraying-tower desulphurization denitration, after discharge two circulations integrated absorption towers of multiple pollutant (5) after corrugated plating demister (30) demist.
4. the multiple pollutant of catalytic oxidation associating lime-gypsum method removal methods simultaneously, it is characterized in that flue gas enters mist cooling device (2), with adjustment to 70~80 of flue gas ℃, flue gas enters 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, 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), 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), 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, corona discharge reactor uses 20kV~50kV dc high-voltage, injector electrode (18) connects positive high voltage, pole plate connects negative high voltage, the top of corona discharging area (19) is upper chamber (17) and exhanst gas outlet, flue gas through upper chamber (17) buffering enters two circulations integrated absorption tower of multiple pollutant (5) from the outlet outflow, 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 with Venturi (4) flue gas is carried out spray for dust suppression 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 be 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, 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 enters 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.
CN2010100395050A 2010-01-05 2010-01-05 Simultaneous removing device and method of various pollutants by electrocatalytical oxidation combining lime-gypsum method CN101716463B (en)

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