CN103768908B - What a kind of wet type integrated desulfurizing denitration demercuration took off PM2.5 removes tower and technique - Google Patents
What a kind of wet type integrated desulfurizing denitration demercuration took off PM2.5 removes tower and technique Download PDFInfo
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- CN103768908B CN103768908B CN201310526495.7A CN201310526495A CN103768908B CN 103768908 B CN103768908 B CN 103768908B CN 201310526495 A CN201310526495 A CN 201310526495A CN 103768908 B CN103768908 B CN 103768908B
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Abstract
What the invention discloses that a kind of wet type integrated desulfurizing denitration demercuration takes off PM2.5 removes tower and technique, described removing in tower is disposed with from the bottom to top: wet desulphurization section, oxidation and denitration demercuration section and wet electric precipitation section, described gas approach is arranged in described wet desulphurization section, and described neat stress outlet is arranged in described wet electric precipitation section.Described technique comprises the following steps: step S101, the wet type desulfurizing stage; Step S102, the denitration demercuration stage; Step S103, the de-PM2.5 stage; Step S104, the discharge neat stress stage.Present invention achieves and remove in tower same the oxysulfide, the NO that successively remove successively in flue gas
x, the subparticle such as Hg, PM2.5, effectively can prevent the formation of " gypsum rain ", improve the purification efficiency to flue gas, flue gas minimum discharge can be realized, and greatly save floor space, reduce operating cost.
Description
Technical field
The present invention relates to the technical field of Air Pollution Control, what particularly relate to that a kind of wet type integrated desulfurizing denitration demercuration takes off PM2.5 removes tower and technique.
Background technology
Industrialized rapid progress is that the mankind bring improving constantly of the economic development of advancing by leaps and bounds and living standard, but the mankind are while enjoying industrialization effort, also subject the various problem of environmental pollutions that fossil fuel in industrial production causes.Wherein, atmosphere pollution is one of the most serious environmental problem of facing of 21 century human society survival and development.China is the country that a coal reserves enriches, coal accounts for 75% of primary energy, the undue dependence of energy consumption structure to coal result in the aggravation of atmosphere pollution, the sulfur dioxide that coal burning is discharged and nitrogen oxide are the main producers things of acid rain and fine particle and haze weather, and the mercury pollution of discharge also causes multiple harm.Therefore, the SO in coal-fired flue-gas
2, NO
x, mercury and fine particle Environmental capacity be topmost task in current Air Pollution Control field.
Day by day strengthening of environmental consciousness makes the task of Environmental capacity become the pith of various countries' environmental protection cause.In order to contain SO
2, NO
x, PM2.5 and mercury harm, realize sustainable development, China constantly strengthens coal-fired utility SO
2and NO
x, PM2.5 and mercury the control of discharge capacity, NO
x, SO
2discharge standard Deng gas pollutant is increasingly strict.
In the world that development technique is simple, operating cost is low, one of direction that the desulfurization and denitrification integral technology with better runnability develops as coal-fired flue-gas Treatment process.The flue gas desulfurization and denitrification technology researched and developed in the world at present can be divided into two large classes: a class applies traditional flue gas desulfurization technique (FGD) combined selective catalytic reduction technique (SCR) to work alone separately the SO removed respectively in flue gas
2and NO
xcombined desulfurization and denitration technology; Another kind of is that a kind of technology of application removes SO in whole system simultaneously
2and NO
xnew associating removing sulfuldioxide, i.e. simultaneous SO_2 and NO removal technology.
In recent years, domestic generally employing first kind desulphurization denitration technology, carrys out desulphurization denitration by Wet Flue Gas Desulfurization Technique (WFGD) with the split type method combined of SCR technology (SCR).Although this kind of method can realize desulfurization and denitration respectively, investment is higher with operating cost, and complex process, therefore develop multiple flue gas pollutant cooperation-removal technology and become a current international study hotspot.In " 863 " high-tech research plan has been listed the technological development of flue gas and desulfurizing and denitrifying demercuration by the Ministry of Science and Technology of China.
At present, coal-burning power plant of China generally adopts Wet Flue Gas Desulfurization Technique (WFGD), and this technology has very high desulfuration efficiency, but is difficult to denitration demercuration simultaneously, this is because the NO in actual industrial flue gas
xmore than 90% is all NO, NO except generating complex compound, hardly by water or alkali liquor absorption.Good wet denitration efficiency to be reached in actual applications, oxidant can be adopted to be oxidized by NO, and be high price mercury mercury oxidation, form water-soluble mercury salt.How NO is improved in wet absorption process
xoxidizability, be the key of wet method simultaneously desulphurization and denitration and demercuration technology.
Coal-fired flue gas desulfurization and denitration demercuration overall-in-one control schema technology has broad application prospects, with adopt separately compared with desulfurization or denitrating technique, in a system, simultaneously desulphurization and denitration is with the obvious advantage, as system complexity reduces, has better runnability, convenient management, floor space little and small investment, low cost.Because of but the important directions of following air contaminant treatment and sustainable development.
The more important thing is, bring due to combustion of fossil fuel the factor of serious atmospheric pollution except SO
2and NO
xoutward, the baneful influence of haze also increasingly sharpens, this pollutant and fine particle (PM2.5).PM2.5 refers to that aerodynamic diameter is less than the subparticle of 2.5 μm, is the key factor causing the environmental problems such as atmospheric visibility reduction, haze weather, acid rain and Global climate change.
At present, PM2.5 pollutes another key problem day by day becoming the atmospheric environment problem that China gives prominence to.Because its specific area is very large, easy enriching heavy metal element is one of topmost pollutant affecting human body health, and existing conventional dust removal technology is to PM
10and following subparticle is difficult to effective trapping.And the exploitation of wet static dedusting technology will play an important role to the control that PM2.5 discharges.
But the technique in current prior art, wet static dedusting technology combined with flue gas and desulfurizing and denitrifying demercuration technology or the rarely seen report of equipment, the applicant is devoted to develop this new product, realizes multiple pollutant as SO
2, NO
x, mercury and PM2.5 etc. combines and removes, and " gypsum rain " phenomenon produced after effectively preventing wet desulphurization, both improve air contaminant treatment effect, reach minimum discharge requirement, can effectively reduce operating cost and floor space again, novel " smoke gas treatment tower " instrument and supplies formed is the impressive progress of green technology innovation, is of great significance for Collaborative Control multiple pollutant tool.
Summary of the invention
In view of the deficiency that above-mentioned prior art exists, the present invention proposes a kind ofly can integrally realize desulphurization and denitration, the removal of mercury combine that the wet type of the subparticles such as the PM2.5 removed in flue gas is integrated removes tower and technique same removing in tower with tower.
For achieving the above object, what the invention provides that a kind of wet type integrated desulfurizing denitration demercuration takes off PM2.5 removes tower, described removing in tower is disposed with from the bottom to top: wet desulphurization section, oxidation and denitration demercuration section and wet electric precipitation section, gas approach is arranged in described wet desulphurization section, and neat stress outlet is arranged in described wet electric precipitation section.
As a further improvement on the present invention, described wet desulphurization section comprises tower prime cement liquid pool and desulfurizer slurry spraying layer, described desulfurizer slurry spraying layer is arranged on above described tower prime cement liquid pool, and described gas approach channel setting is between described desulfurizer slurry spraying layer and described tower prime cement liquid pool.
Described tower prime cement liquid pool is built-in with oxidation air pipe, described oxidation air pipe is driven by the oxidation fan being arranged on described wet desulphurization section outside, the below of described oxidation air pipe is provided with jet stirrer, and described jet stirrer is led to by the upper guide of the jet pump and described tower prime cement liquid pool that are arranged on described wet desulphurization section outside and connects.
Described desulfurizer slurry spraying layer is connected with described tower prime cement liquid pool with the circulating pump being arranged on described wet desulphurization section outside, forms serum recycle loop, is imported in described desulfurizer slurry spraying layer by the slurries in described tower prime cement liquid pool.
As a further improvement on the present invention, from top to bottom be disposed with in described oxidation and denitration demercuration section: oxidizing agent solution entrance, flue gas distributor, flue gas even distribution device and oxidizing agent solution export, and described flue gas even distribution device conducting connects described wet desulphurization section and oxidation and denitration demercuration section.Described flue gas even distribution device evenly offers pore, and flue gas is pore ejection thus after entering described oxidation and denitration demercuration section from described flue gas even distribution device, contacts with the oxidizing agent solution in described oxidation and denitration demercuration section and reacts.
As a further improvement on the present invention, described oxidation and denitration demercuration section outside is also provided with an oxidizing agent solution storage tank, the outlet of described oxidizing agent solution is drawn with uniform flue gas generation gas-liquid contact in tower and in reacted oxidizing agent solution to described oxidizing agent solution storage tank, oxidizing agent solution in described oxidizing agent solution storage tank is directed to described oxidizing agent solution entrance again, again enter in described oxidation and denitration demercuration section, form oxidant flow cycle.
As a further improvement on the present invention, described flue gas distributor is single or multiple lift structure, and described flue gas distributor and described flue gas even distribution device evenly offer pore.
As a further improvement on the present invention, from top to bottom be disposed with in described wet electric precipitation section: neat stress outlet, pole plate flushing water spray equipment, electric field region and flushing water outlet, described electric field region is arranged by the minus plate of some upright layouts and positive plate alternate intervals and is formed, and the electric field region of described wet electric precipitation section can be set to single-stage or multistage.
As a further improvement on the present invention, also demister is provided with in described wet desulphurization section, described demister is arranged in above desulfurizer slurry spraying layer, the water inlet of the flushing water pipeline of described demister and described wet electric precipitation section pole plate flushing water outlet guide lead to and connect, after mist eliminator flushing water falls into slurry pool, again via after the dehydration of dewatering slurries system, be back to wet electric precipitation section pole plate flushing water, form flushing water closed circuit thus.
The present invention also proposes the removing process that a kind of wet type integrated desulfurizing denitration demercuration takes off PM2.5, and the tower that removes that the wet type integrated desulfurizing denitration demercuration described in employing takes off PM2.5 carries out gas cleaning process, comprises the following steps:
Step S101, in the wet type desulfurizing stage: imported in described wet desulphurization section by gas approach by pending flue gas, starts described desulfurizer slurry spraying layer and sprays described pending flue gas, complete wet type desulfurizing.
Step S102, the denitration demercuration stage: the pending flue gas after desulfurization enters in described oxidation and denitration demercuration section, fully contact and react with flue gas distributor with the oxidizing agent solution in described oxidation and denitration demercuration section through flue gas even distribution device, the NO in the pending flue gas of oxidation removing
xand Hg.
Step S103, the de-PM2.5 stage: the pending flue gas after denitration demercuration enters in described wet electric precipitation section, through the high-tension electricity place that described anode and cathode plate is formed, the subparticles such as the PM2.5 in pending flue gas, gypsum particulate are charged, and migrate to described positive plate, washed away removing by the uniform water film on positive plate.
Step S104, the discharge neat stress stage: the pending flue gas after de-PM2.5 is discharged by neat stress floss hole.
As a further improvement on the present invention, the desulfurizing agent that described desulfurizer slurry spraying layer adopts is lime stone, quick lime, carbide slag or white clay etc.
As a further improvement on the present invention, the oxidizing agent solution in described oxidation and denitration demercuration section is NaClO solution, H
2o
2solution or KMnO
4the strong oxidizing solution such as solution.
Wet type integrated desulfurizing denitration demercuration of the present invention take off PM2.5 remove tower and technique compared with prior art at least has following technique effect:
What wet type integrated desulfurizing denitration demercuration of the present invention took off PM2.5 removes tower, conventional wet sulfur removal technology and oxidation and denitration demercuration technology and wet electrostatic precipitation technology three are be combined with each other effectively, achieves and remove in tower same the oxysulfide, the NO that successively remove successively in flue gas
x, the subparticle such as Hg, PM2.5, effectively can prevent the formation of " gypsum rain ", improve the purification efficiency to flue gas, flue gas minimum discharge can be realized, and greatly save floor space, reduce operating cost.
Wet type integrated desulfurizing denitration demercuration of the present invention takes off the removing process of PM2.5, on the basis of existing Wet Flue Gas Desulfurization Technology, is fully contacted by strong oxidizing solution and react with flue gas after desulfurization, making the NO in flue gas be oxidized to NO
2, NO
2absorbed by solution and removed, this process can simultaneous removing heavy metal Hg, and flue gas enters high voltage electric field subsequently, and PM2.5 etc. are by charged transfer and cleaning removing.So just achieve and in same tower, combining of multiple pollutant is removed, improve the efficiency of gas pollution control.
Accompanying drawing explanation
Fig. 1 is the structural representation removing tower that wet type integrated desulfurizing denitration demercuration of the present invention takes off PM2.5.
Fig. 2 is the plan structure schematic diagram of flue gas even distribution device of the present invention.
Primary clustering symbol description in figure:
100, wet desulphurization section 101, circulating pump 102, serum recycle loop
103, jet stirrer 104, jet pump 105, oxidation air pipe
106, oxidation fan 107, tower prime cement liquid pool 108, desulfurizer slurry spraying layer
109, demister 110, flushing water pipeline 200, oxidation and denitration demercuration section
201, flue gas even distribution device 202, pore 203, flue gas distributor
204, oxidizing agent solution 205, oxidizing agent solution entrance 206, oxidizing agent solution outlet
207, oxidizing agent solution storage tank 300, wet electric precipitation section 301, positive plate
302, minus plate 303, pole plate flushing water spray equipment 304, flushing water outlet
400, gas approach 500, neat stress outlet.
Detailed description of the invention
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Embodiment one:
Fig. 1 is the structural representation removing tower that wet type integrated desulfurizing denitration demercuration of the present invention takes off PM2.5.As shown in Figure 1, what a kind of wet type integrated desulfurizing denitration demercuration that the present embodiment proposes took off PM2.5 removes tower, described removing in tower is disposed with from the bottom to top: wet desulphurization section 100, oxidation and denitration demercuration section 200 and wet electric precipitation section 300, gas approach 400 is arranged in wet desulphurization section 100, and neat stress outlet 500 is arranged in wet electric precipitation section 300.
Specifically, wet desulphurization section 100 comprises tower prime cement liquid pool 107 and desulfurizer slurry spraying layer 108, desulfurizer slurry spraying layer 108 is arranged on above tower prime cement liquid pool 107, and gas approach 400 channel setting is between desulfurizer slurry spraying layer 108 and tower prime cement liquid pool 107.
The middle part of tower prime cement liquid pool 107 is built-in with oxidation air pipe 105, oxidation air pipe 105 is driven by the oxidation fan 106 being arranged on wet desulphurization section 100 outside, the below of oxidation air pipe 105 is provided with jet stirrer 103, and jet stirrer 103 is led to by the upper guide of the jet pump 104 with tower prime cement liquid pool 107 that are arranged on wet desulphurization section 100 outside and connects.
Desulfurizer slurry spraying layer 108 is connected with described tower prime cement liquid pool 107 with the circulating pump 101 being arranged on wet desulphurization section 100 outside, forms serum recycle loop 102, is imported in desulfurizer slurry spraying layer 108 by the slurries in tower prime cement liquid pool 107.
As mentioned above, jet stirrer 103 is connected outward at tower with jet pump 104, and jet stirrer 103 pairs of tower prime cement liquid play stirring action, prevent slurries from luming.Oxidation fan 106 provides oxidation air for oxidation air pipe 105, for improving slurries oxidation effectiveness, promotes accessory substance quality.Desulfurizer slurry spraying layer 108 sprays desulfurizer slurry downwards, contacts, reach desulfurization object with flue gas is reverse.
Specifically, from top to bottom be disposed with in oxidation and denitration demercuration section 200: oxidizing agent solution entrance 205, flue gas distributor 203, flue gas even distribution device 201 and oxidizing agent solution outlet 206, flue gas even distribution device 201 conducting connects wet desulphurization section 100 and oxidation and denitration demercuration section 200.
Oxidation and denitration demercuration section 200 outside is also provided with an oxidizing agent solution storage tank 207, oxidizing agent solution outlet 206 is drawn and uniform flue gas generation gas-liquid contact in reacted oxidizing agent solution 204 to oxidizing agent solution storage tank 207 in tower, oxidizing agent solution in oxidizing agent solution storage tank 207 is directed to oxidizing agent solution entrance 205 again, again enter in oxidation and denitration demercuration section 200, form oxidant flow cycle.
As shown in Figure 1, flue gas distributor 203 is sandwich construction, and flue gas distributor 203 evenly offers pore, and each layer flue gas distributor is staggered to be plugged in oxidation and denitration demercuration section 200.Of course, in other specific embodiments, flue gas distributor can be also a Rotating fields, repeats no more herein.
As depicted in figs. 1 and 2, flue gas even distribution device 201 offers even pore 202, flue gas to enter after oxidation and denitration demercuration section 200 pore thus by flue gas even distribution device 201 and sprays, and contacts with the oxidizing agent solution 204 in oxidation and denitration demercuration section 200 and reacts.
Oxidizing agent solution 204 is full of in oxidation and denitration demercuration section 200, flue gas passes into bottom oxidation and denitration demercuration section 200, evenly sprayed by the pore on flue gas even distribution device 201 and flue gas distributor 203, in oxidizing agent solution 204, be dispersed into bubble and rise, gas-liquid contact reacts, and oxidized dose of the NO in flue gas is oxidized to NO
2, NO
2by solution absorption, the NO in flue gas
xremoved, meanwhile, the Elemental Mercury in flue gas also oxidized agent solution 204 is oxidized to Hg2+ removing.
In the present embodiment use procedure, because cigarette speed is higher in oxidation and denitration demercuration section 200, bubble forms agitated liquid simultaneously fast, serves stirring action on the one hand, too increases mass-transfer efficiency on the other hand.The setting of flue gas distributor 203 can make flue gas be uniformly distributed in oxidizing agent solution 204, improves gas-liquid contact effect.
Specifically, from top to bottom be disposed with in wet electric precipitation section 300: neat stress outlet 500, pole plate flushing water spray equipment 303, electric field region and flushing water outlet 304, described electric field region is minus plate 302 and the positive plate 301 alternate intervals arrangement formation of some upright layouts.
Also be provided with demister 109 in wet desulphurization section 100, demister 109 is arranged in above desulfurizer slurry spraying layer 108, and water inlet and the flushing water of the flushing water pipeline 110 of demister 109 export 304 conductings and be connected.The droplet that flue gas after desulfurization carries is removed by demister 109, and demister 109 is provided with flushing water pipeline 110, repeats to recycle that the pole plate flushing water of wet electric precipitation section is intermittent cleans demister.
As shown in Figure 1, the wet electric precipitation section 300 inner cathode plate 302 of the present embodiment and positive plate 301 standing intervals are superimposed to arrange and form described anode and cathode plate, pole plate flushing water spray equipment 303 is set above described anode and cathode plate, even uniform moisture film is formed on positive plate 301, the point discharge of minus plate 302 prickle, can by charged for the subparticles such as PM2.5 in flue gas and move to positive plate 301, washed away removing by the moisture film on positive plate 301, finally realize neat stress and export 500 discharges by the neat stress on electric precipitation section 300 top of wetting.
Exemplary, the electric field of wet electric precipitation section 300 can be set to single-stage or multi-stag.Wet electric precipitation section 300 drawn by anode and cathode plate lower end for the formation of the pole plate flushing water of moisture film after as the flushing water of the demister 109 of wet desulphurization section 100, this flushing water falls into tower prime cement liquid pool 107, reclaim after dewatering slurries system again, continue to serve as the positive plate flushing water of wet electric precipitation section 300, form flushing water closed circuit thus.
In the present embodiment, adopt lime stone as desulfurizing agent, NaClO solution is as denitration oxidant.Pending flue gas enters from gas approach 400 and removes tower, first contact with the desulfurizer slurry that desulfurizer slurry spraying layer 108 in wet desulphurization section 100 sprays and desulfurization, oxidation and denitration demercuration section 200 is entered by by demister 109, then the pore on the multilayer flue gas distributor 203 arranged by flue gas even distribution device 201 and top thereof is uniformly distributed, and carries out gas-liquid contact with the oxidizing agent solution 204 that is full of in oxidation and denitration demercuration section 200 and react to remove NO
x, the simultaneously heavy metal also oxidized removing such as Hg; Finally, flue gas enters wet electric precipitation section 300, this section of minus plate 302 and positive plate 301 are spaced, the point discharge of minus plate 302 prickle, by charged for the subparticles such as PM2.5 in flue gas and move to positive plate 301, washed away removing by the uniform water film on positive plate 301, neat stress exports 500 by the electric precipitation section 300 top neat stress that wets and discharges.
The slurries of the tower prime cement liquid pool 107 of wet desulphurization section 100 obtain accessory substance gypsum, the gypsum particle carried in flue gas after desulfurization and SO after the dehydration of belt dewatering system
3droplets etc. are removed by wet electric precipitation section 300, and the particle such as PM2.5 that in flue gas, original and desulphurization denitration newly produces also is removed by wet electric precipitation section 300, and efficiency of dust collection reaches 97%, and denitration efficiency reaches more than 80%, and desulfuration efficiency reaches more than 95%., demercuration efficiency reaches more than 95% simultaneously.
Embodiment two:
The present embodiment proposes the removing process that a kind of wet type integrated desulfurizing denitration demercuration takes off PM2.5, and the tower that removes adopting the wet type integrated desulfurizing denitration demercuration described in embodiment 1 to take off PM2.5 carries out gas cleaning process, by reference to the accompanying drawings, comprises the following steps:
Step S101, in the wet type desulfurizing stage: imported in described wet desulphurization section 100 by gas approach 400 by pending flue gas, starts described desulfurizer slurry spraying layer 108 and sprays described pending flue gas, complete wet type desulfurizing.
Step S102, the denitration demercuration stage: the pending flue gas after desulfurization enters in described oxidation and denitration demercuration section 200, fully contact and react with flue gas distributor 203 with the oxidizing agent solution 204 in described oxidation and denitration demercuration section 200 through flue gas even distribution device 201, the NO in the pending flue gas of oxidation removing
xand Hg.
Step S103, the de-PM2.5 stage: the pending flue gas after denitration demercuration enters in described wet electric precipitation section 300, through the high-tension electricity place that described anode and cathode plate 302,301 is formed, the subparticles such as the PM2.5 in pending flue gas, gypsum particulate are charged, and move to described positive plate 301, washed away removing by the uniform water film on positive plate 301.
Step S104, the discharge neat stress stage: the pending flue gas after de-PM2.5 is discharged by neat stress floss hole 500.
Exemplary, the desulfurizing agent that the described desulfurizer slurry spraying layer of the present embodiment adopts is lime stone, and the oxidizing agent solution in described oxidation and denitration demercuration section is NaClO solution.Of course, in other specific embodiments, the desulfurizing agent that described desulfurizer slurry spraying layer adopts can also be quick lime, carbide slag or white clay etc., and the oxidizing agent solution in described oxidation and denitration demercuration section can also be H
2o
2solution or KMnO
4solution.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a wet type integrated desulfurizing denitration demercuration takes off PM
2.5remove tower, it is characterized in that:
Described removing in tower is disposed with from the bottom to top: wet desulphurization section, oxidation and denitration demercuration section and wet electric precipitation section, and gas approach is arranged in described wet desulphurization section, and neat stress outlet is arranged in described wet electric precipitation section;
From top to bottom be disposed with in described oxidation and denitration demercuration section: oxidizing agent solution entrance, flue gas distributor, flue gas even distribution device and oxidizing agent solution export, and described flue gas even distribution device conducting connects described wet desulphurization section and oxidation and denitration demercuration section;
Described flue gas even distribution device evenly offers pore, and flue gas is pore ejection thus after entering described oxidation and denitration demercuration section from described flue gas even distribution device, contacts with the oxidizing agent solution in described oxidation and denitration demercuration section and reacts;
Described oxidation and denitration demercuration section outside is also provided with an oxidizing agent solution storage tank, the outlet of described oxidizing agent solution is drawn with uniform flue gas generation gas-liquid contact in tower and in reacted oxidizing agent solution to described oxidizing agent solution storage tank, oxidizing agent solution in described oxidizing agent solution storage tank is directed to described oxidizing agent solution entrance again, again enter in described oxidation and denitration demercuration section, form oxidant flow cycle; Described flue gas distributor is single or multiple lift structure, and described flue gas distributor evenly offers pore; From top to bottom be disposed with in described wet electric precipitation section: neat stress outlet, pole plate flushing water spray equipment, electric field region and flushing water outlet, described electric field region is arranged by the minus plate of some upright layouts and positive plate alternate intervals and is formed, and described electric field region is set to single-stage or multistage;
Also demister is provided with in described wet desulphurization section, described demister is arranged in above desulfurizer slurry spraying layer, the water inlet of the flushing water pipeline of described demister and described wet electric precipitation section pole plate flushing water outlet guide lead to and connect, after mist eliminator flushing water falls into tower prime cement liquid pool, again via after the dehydration of dewatering slurries system, continue to be back to wet electric precipitation section pole plate flushing water, form flushing water closed circuit thus;
Described wet desulphurization section comprises tower prime cement liquid pool and desulfurizer slurry spraying layer, and described desulfurizer slurry spraying layer is arranged on above described tower prime cement liquid pool, and described gas approach is arranged between described desulfurizer slurry spraying layer and described tower prime cement liquid pool;
Described tower prime cement liquid pool is built-in with oxidation air pipe, described oxidation air pipe is driven by the oxidation fan being arranged on described wet desulphurization section outside, the below of described oxidation air pipe is provided with jet stirrer, and described jet stirrer is led to by the upper guide of the jet pump and described tower prime cement liquid pool that are arranged on described wet desulphurization section outside and connects;
Described desulfurizer slurry spraying layer is connected with described tower prime cement liquid pool with the circulating pump being arranged on described wet desulphurization section outside, forms serum recycle loop, is imported in described desulfurizer slurry spraying layer by the slurries in described tower prime cement liquid pool.
2. a wet type integrated desulfurizing denitration demercuration takes off PM
2.5removing process, it is characterized in that: adopt wet type integrated desulfurizing denitration demercuration according to claim 1 to take off PM
2.5the tower that removes carry out gas cleaning process, comprise the following steps:
Step S101, in the wet type desulfurizing stage: imported in described wet desulphurization section by gas approach by pending flue gas, starts described desulfurizer slurry spraying layer and sprays described pending flue gas, complete wet type desulfurizing;
Step S102, the denitration demercuration stage: the pending flue gas after desulfurization enters in described oxidation and denitration demercuration section, fully contact and react with flue gas distributor with the oxidizing agent solution in described oxidation and denitration demercuration section through flue gas even distribution device, the NO in the pending flue gas of oxidation removing
xand Hg;
Step S103, de-PM
2.5stage: the pending flue gas after denitration demercuration enters in described wet electric precipitation section, through the high-tension electricity place that described anode and cathode plate is formed, the PM in pending flue gas
2.5, the subparticle such as gypsum particulate is charged, and migrates to described positive plate, washed away removing by the uniform water film on positive plate;
Step S104, the discharge neat stress stage: will PM be taken off
2.5after pending flue gas discharged by neat stress floss hole.
3. wet type integrated desulfurizing denitration demercuration as claimed in claim 2 takes off PM
2.5removing process, it is characterized in that: the desulfurizing agent that described desulfurizer slurry spraying layer adopts is lime stone, quick lime, carbide slag or white clay.
4. wet type integrated desulfurizing denitration demercuration as claimed in claim 2 takes off PM
2.5removing process, it is characterized in that: the oxidizing agent solution in described oxidation and denitration demercuration section is NaClO solution, H
2o
2solution or KMnO
4solution.
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| CN104014217B (en) * | 2014-06-18 | 2016-03-23 | 上海龙净环保科技工程有限公司 | A kind of wet flue gas demercuration coordinated desulfurization take off system and the technique of PM2.5 |
| CN104307326B (en) * | 2014-10-24 | 2016-08-24 | 沈阳万捷重工机械有限公司 | Low temperature wet type ionized oxygen denitration, ultrapurification technique |
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| CN105664707A (en) * | 2016-01-25 | 2016-06-15 | 中国南方电网有限责任公司 | Additive for desulfurization, denitrification and mercury removal of flue gas of thermal power plant and preparation method and application of additive |
| CN105854567B (en) * | 2016-06-06 | 2018-09-14 | 科洋环境工程（上海）有限公司 | A kind of smoke processing system and method based on hydrogen peroxide |
| CN108579300B (en) * | 2018-05-17 | 2021-04-09 | 柏美迪康环境科技（上海）股份有限公司 | Wet-type purification treatment method and system for blast furnace flue gas of steel plant |
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| CN102553428A (en) * | 2012-01-10 | 2012-07-11 | 华北电力大学（保定） | Absorption tower for desulfurization and denitrification combined with oxidant in forward-flow and back-flow spraying and method |
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| CN102553428A (en) * | 2012-01-10 | 2012-07-11 | 华北电力大学（保定） | Absorption tower for desulfurization and denitrification combined with oxidant in forward-flow and back-flow spraying and method |
| CN103055644A (en) * | 2012-12-31 | 2013-04-24 | 福建龙净环保股份有限公司 | Wet-type electric dust removal system after wet desulphurization |
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