CN205672767U - A kind of smoke processing system based on hydrogen peroxide - Google Patents
A kind of smoke processing system based on hydrogen peroxide Download PDFInfo
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- CN205672767U CN205672767U CN201620542500.2U CN201620542500U CN205672767U CN 205672767 U CN205672767 U CN 205672767U CN 201620542500 U CN201620542500 U CN 201620542500U CN 205672767 U CN205672767 U CN 205672767U
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- hydrogen peroxide
- agent solution
- oxidizing agent
- spray thrower
- flue gas
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Abstract
The utility model discloses a kind of smoke processing system based on hydrogen peroxide and include absorption tower, absorption tower is provided with the first spray thrower and the second spray thrower；First spray thrower and the connection of the first oxidant storage tank, the first spray thrower sprays in flue gas and is used for absorbing SO in flue gas2And NO2In the first oxidizing agent solution；Second spray thrower and the connection of the second oxidant storage tank, and below the second spray thrower, it is provided with discharge electrode and dust collecting electrode, the second spray thrower sprays the second oxidizing agent solution, the dust in trapping flue gas and heavy metal to by the flue gas of discharge electrode and dust collecting electrode；It is loaded with high voltage electric field between discharge electrode and dust collecting electrode, is used for exciting the second oxidizing agent solution to form great amount of hydroxy group free radical, form HNO for aoxidizing the NO in flue gas2And NO2, ultimately generate N2And CO2.Smoke processing system simple in construction based on hydrogen peroxide of the present utility model, floor space is little, can effectively remove the SO in flue gas2、NOX, dust and heavy metal particles, and non-secondary pollution.
Description
Technical field
This utility model relates to the cleaning system design field of flue gas, a kind of fume treatment based on hydrogen peroxide
System.
Background technology
Along with economic development, the dust of discharge, SO after fuel combustion2、NOX, the life to China of the pollutant such as heavy metal
State environment produces enormous impact.The problem such as haze, acid rain, greenhouse effect continues to bring out in recent years, and environmental protection is told by general public
Ask and grow to even greater heights.In this context, the related industrial fields such as posted row successively such as electric power, petrochemical industry, iron and steel, coal, pottery, metallurgy
The pollutant emission standard in portion in the industry." GB31571-2015 petro chemical industry pollutant emission mark according to up-to-date issue
Accurate ", on July 1st, 2015 plays newly-built enterprise particulate matter, SO2、NOXDischarge index is respectively 20,100,150mg/Nm3；For state
Soil developing density is high, ecological environment frailty and easily occur the region polluted then to perform tightened up requirement, be 20,50,100mg/
Nm3。
The fume treatment flow process of main flow predominantly first passes through selective-catalytic-reduction denitrified, subsequently to air preheater at present
Adjust temperature, enter dry electrical dust precipitator and remove major part dust granules, then remove SO through wet desulphurization device2, wet type
Electric dust collector removes PM2.5, after through smoke stack emission.Whole vent gas treatment flow process is tediously long, and removing pollutant are single, initially throw
Money and operating cost are high.
In order to simplify fume treatment flow process, flue gas pollutant cooperation-removal technology has been carried out widely studied by academia, but
Being to be in progress the most slowly, its main cause is that NOXIn be insoluble in the NO, NO of water at room temperature containing more than 90%
Dissolubility compares SO2Low 3 orders of magnitude so that it is the resistance of liquid phase scrubbing is very big.This characteristic causes conventional wet desulphurization denitration skill
It is high generally to there is desulfuration efficiency in art, but the problem that denitration efficiency is low, hinder its industrial applications.Therefore, NO is the quickest
It is converted into readily soluble form and is fixed in absorbing liquid one of the key being to solve this problem.
Additionally, the most common desulphurization denitration absorbent is mainly the alkaline solutions such as ammonia, lime water, NaOH.Obviously this
The method of kind is absorbing SO2And NOXAfter can produce the secondary pollutions such as salt waste liquid, waste residue, how to process these secondary pollutions become
Become a new difficult problem.
The Chinese patent of Application No. 200910262978.4 discloses a kind of method of denitration and desulfurization method combined with urea wet,
The main technical schemes of this patent: spray into mass percent concentration 50% hydrogen peroxide in coal-fired flue-gas porch, absorption tower, will combustion
NO in flue-gas is oxidized to NO2, improve NOXOxidizability；Aqueous solution of urea in recycling absorption tower carries out desulfurization simultaneously and takes off
Nitre.This patent is not the most adopted an effective measure and is solved the problem that NO dissolubility is low, it is anticipated that NO is converted into NO2Efficiency
The lowest, can not accomplish the end in view.
The Chinese patent of Application No. 201010296492.5 discloses a kind of based on de-while photochemical advanced oxygenation
Sulfur denitrating system, is provided with ultraviolet lamp tube in spray column, it is interior through ultraviolet light that hydrogenperoxide steam generator sprays into spray column by atomizer
Excitation-decomposition, the hydroxyl radical free radical (OH) of generation strong oxidizing property occurs Gas-Liquid Absorption to react after contacting in spray column with flue gas,
NO in oxidation removal flue gasXWith SO2.In actual applications, Burdick lamp is in the tower body of a full fine mist, light
The actual penetration depth of line is extremely low, in order to ensure exciting and penetrating of ultraviolet, and the extremely complex ultraviolet of this Patent design
Lamp arrangement, causes power supply and guard system is complicated and energy consumption increases.
The Chinese patent of Application No. 200910095548.8 discloses a kind of wet-type flue gas treating reactor by pulse corona,
Use ammonia as absorbent, utilize the pulse voltage of 30kV to excite generation Strong oxdiative type free radical, process SO2、NOX, energy simultaneously
Obtain higher PM2.5 removal efficiency.Owing to ammonia belongs to inflammable explosive article, when selecting ammonia as reducing agent, should meet
The related request of GB18218 " Major Hazard Installations Identifying ".Pulse voltage excite free radical that ammonia excites essentially from water, freely
Base formation efficiency is limited, and causes NH3Volatilization, produces secondary pollution, has certain risk.
Therefore, the applicant is devoted to provide a kind of smoke processing system based on hydrogen peroxide.
Utility model content
The purpose of this utility model is to provide a kind of smoke processing system based on hydrogen peroxide, and it can effectively remove flue gas
In easy absorbed SO2、NO2And it is not readily dissolved in the pollutant such as the NO of water, dust and heavy metal particles, secondary pollution will not be produced,
And native system is succinct, floor space is little, initial outlay and operating cost the most relatively low.
For solving above-mentioned technical problem, this utility model provides a kind of smoke processing system based on hydrogen peroxide, including
Absorption tower, is sequentially provided with the first spray thrower and the second spray thrower between air inlet and the gas outlet on described absorption tower.
Described first spray thrower and the connection of the first oxidant storage tank, described first spray thrower is for spraying first in flue gas
Oxidizing agent solution, described first oxidizing agent solution is for absorbing SO soluble in water in flue gas2And NO2, described first oxidant is molten
Liquid is hydrogen peroxide solution.
Described second spray thrower and the connection of the second oxidant storage tank, and it is provided with discharge electrode and collection below described second spray thrower
Dirt pole, the shower nozzle direction of described second spray thrower is towards described discharge electrode and dust collecting electrode, and described second spray thrower is for passing through
The flue gas of described discharge electrode and dust collecting electrode sprays the second oxidizing agent solution, and the second oxidizing agent solution is for trapping the dust in flue gas
And heavy metal, described second oxidizing agent solution is the mixed solution of hydrogen peroxide and carbamide.
Being loaded with high voltage electric field between described discharge electrode and described dust collecting electrode, described discharge electrode and described dust collecting electrode are described
Exciting described second oxidizing agent solution to form multiple hydroxyl radical free radical under high voltage electric field effect, described hydroxyl radical free radical is used for aoxidizing
NO in flue gas forms the HNO easily absorbed by described second oxidizing agent solution2And NO2, HNO2And NO2With the second oxidizing agent solution
In carbamide further react generation N2And CO2。
Preferably, described second oxidant storage tank includes hydrogen peroxide storage tank and urea storage tank；Described hydrogen peroxide storage tank and institute
State urea storage tank all to connect with one hydrogen peroxide/carbamide blender；Described hydrogen peroxide/carbamide blender is with described second spray thrower even
Logical.
Preferably, in the mixed solution that described hydrogen peroxide/carbamide blender obtains the weight ratio of hydrogen peroxide be 3%wt～
10%wt, the weight ratio of carbamide are 2%wt～8%wt.
Preferably, described smoke processing system based on hydrogen peroxide also includes: separating and filtering device, is arranged on described absorption
Outside tower, and connecting with described absorption tower, described separating and filtering device oxidant after separating and filtering with smoke reaction is molten
Liquid.
Preferably, described separating and filtering device includes the second separating and filtering device and the first separating and filtering device, described
Two separating and filtering devices the second oxidizing agent solution after separating and filtering with smoke reaction, described first separating and filtering device is used
The first oxidizing agent solution after the first oxidizing agent solution after separating and filtering and smoke reaction, with smoke reaction include sulphuric acid and
Nitric acid.
Preferably, described smoke processing system based on hydrogen peroxide also includes oxidizing agent solution blender, oxidizing agent solution
Blender connects with described first spray thrower, described first oxidant storage tank and described first separating and filtering device respectively, described
Oxidizing agent solution blender is for mixing first oxidizing agent solution supplemented and described the of described first oxidant storage tank input
Unreacted first oxidizing agent solution of one separating and filtering device input, and mixed first oxidizing agent solution is input to institute
State in the first spray thrower.
Preferably, described first oxidant storage tank is hydrogen peroxide storage tank, and described oxidizing agent solution blender is input to institute
Stating the weight ratio of hydrogen peroxide in the first oxidizing agent solution in the first spray thrower is: 1%wt～10%wt.
Preferably, described discharge electrode uses lead-antimony alloy or 254SMO barbed nail corona electrode line；And/or；Described dust collecting electrode is adopted
Restrain with honeycombed or circular acidproof conductive carbon fibre reinforced composite material；And/or；Described absorption tower uses acid corrosion-resistant material
Manufacturing, the inwall on described absorption tower is steel construction or the high strength glass steel layer with acid-proof coating.
Smoke processing system based on hydrogen peroxide of the present utility model can realize at least one beneficial effect following:
1, during smoke processing system based on hydrogen peroxide of the present utility model first passes through the first oxidizing agent solution removal flue gas
The SO that major part is soluble in water2、NO2And a small amount of dust and heavy metal particles, thus the composition being effectively simplified in flue gas becomes
Point；The second oxidizing agent solution is excited to produce multiple hydroxyl radical free radicals, cigarette by the high voltage electric field between dust collecting electrode and discharge electrode again
NO in gas generates HNO with hydroxyl radical reaction2And NO2, HNO2And NO2Generation is reacted again harmless with the second oxidizing agent solution
N2And CO2, smoke processing system based on hydrogen peroxide of the present utility model can effectively remove the NO being not readily dissolved in water in flue gas
Gas, and secondary pollution will not be produced.
2, to spray the second oxidant by the second spray thrower molten for smoke processing system based on hydrogen peroxide of the present utility model
Liquid, makes the flue gas in flue gas flow channel and the spraying of the second oxidizing agent solution inversely contact and mix, and the second oxidizing agent solution spraying can
Forming drop with the dust in effectively trapping flue gas with heavy metal particles, drop is charged under the effect of high voltage electric field, and at electricity
Moving under the effect of field force in dust collecting electrode, drop is enriched with on collecting polar plate and then forms the moisture film of uniform easily collecting, from
And effectively remove in flue gas dust and the heavy metal particles being not readily dissolved in water.
3, in smoke processing system based on hydrogen peroxide of the present utility model, the second oxidant storage tank includes hydrogen peroxide storage tank
And urea storage tank, the second oxidizing agent solution of the second spray thrower spray is the mixed solution of hydrogen peroxide and carbamide, when so arranging,
Hydrogen peroxide can under the exciting of high voltage electric field the substantial amounts of hydroxyl radical free radical of generation, and urea liquid can effectively absorb NO by oxygen
The HNO obtained after change2And NO2, thus it is effectively increased the absorbance of NO in flue gas, and urea liquid can also absorb further
The SO that first oxidizing agent solution does not fully absorbs2、NO2And a small amount of dust and heavy metal particles.
4, after smoke processing system based on hydrogen peroxide of the present utility model is by separating and filtering device pair and smoke reaction
Oxidizing agent solution carry out separating and filtering process, the separating and filtering thing obtained can recycle after processing respectively, thus keeps away
Exempt from secondary pollution, it is achieved that zero-emission.
5, flue gas processing method step based on hydrogen peroxide of the present utility model is simple, easily operates, can effectively remove smoke abatement
Easy absorbed SO in gas2、NO2And be not readily dissolved in the NO of water, dust and heavy metal, and secondary pollution will not be produced.
6, smoke processing system based on hydrogen peroxide of the present utility model is particularly suited for processing the cigarette containing following components
Gas: SO2Concentration range be 100～8000ppmV, NOXConcentration range be 100～1400ppmV, the concentration model of dust granules
Enclose is 50～2000mg/Nm3。
Accompanying drawing explanation
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is the structural representation of a kind of specific embodiment of smoke processing system based on hydrogen peroxide of the present utility model
Figure.
Drawing reference numeral illustrates:
Absorption tower 10, air inlet 11, gas outlet 12；First spray thrower 21, hydrogen peroxide storage tank 22, the first separating and filtering device
23, the first catch tray 24, oxidizing agent solution blender 25；Second spray thrower 31, discharge electrode 32, dust collecting electrode 33, urea storage tank 34,
Hydrogen peroxide/carbamide blender 35, the second separating and filtering device 36, the second catch tray 37；Cleaner unit 40；Heat exchanger 50；Chimney 60.
Detailed description of the invention
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Embodiment one
Embodiment one discloses smoke processing system one based on hydrogen peroxide of the present utility model and the most preferably implements
Example, SO in its flue gas processed2Concentration range be 100ppmV～8000ppmV, NOXConcentration range be 100ppmV～
1400ppmV, the concentration range of dust granules is 50mg/Nm3～2000mg/Nm3。
Smoke processing system based on hydrogen peroxide in the present embodiment includes absorption tower 10, the air inlet on absorption tower 10 11
In the bottom on absorption tower, gas outlet 12 is positioned at the top on absorption tower, is provided with between air inlet 11 and the gas outlet 12 on absorption tower 10
First spray thrower 21 and the second spray thrower 31.
First spray thrower 21 connects with the first oxidant storage tank, and the first oxidant storage tank is hydrogen peroxide storage tank 22, and first
Spray thrower 21 is for spraying the first oxidizing agent solution in flue gas, and the first oxidizing agent solution is soluble in water for absorbing in flue gas
SO2And NO2, the chemical equation of its core is:
H2O2+SO2=H2SO4
H2O2+2NO2=2H2NO3
Second spray thrower 31 connects with the second oxidant storage tank, and is provided with discharge electrode 32 and dust below the second spray thrower 31
Pole 33.The shower nozzle direction of the second spray thrower towards discharge electrode 32 and dust collecting electrode 33, the second spray thrower for by discharge electrode and
The flue gas of dust collecting electrode sprays the second oxidizing agent solution.
In the present embodiment, the second oxidant storage tank includes hydrogen peroxide storage tank and urea storage tank 34.In the present embodiment,
Hydrogen peroxide storage tank in dioxy agent storage tank and the hydrogen peroxide storage tank in the first oxidant storage tank are same storage tank, i.e. hydrogen peroxide storage
Tank 22, so arranges the floor space that with simplified system, can reduce system.
Hydrogen peroxide storage tank 22 and urea storage tank 34 all connect with one hydrogen peroxide/carbamide blender 35；Hydrogen peroxide/carbamide mixing
Device 35 connects with the second spray thrower 31.
Be loaded with high voltage electric field between discharge electrode 32 and dust collecting electrode 33, in the processing procedure of flue gas, the second spray thrower to
Spraying hydrogen peroxide/carbamide mixed solution in flue gas flow channel between discharge electrode and dust collecting electrode, discharge electrode and dust collecting electrode are at high-tension electricity
The hydrogen peroxide solution in mixed solution is excited to form great amount of hydroxy group free radical (OH), hydroxyl radical free radical (OH) oxygen under field action
Change the NO in flue gas and form the HNO of easily absorption2And NO2, HNO2And NO2With the urea liquid in mixed solution react generation harmless
N2And CO2, the chemical equation of its core is:
H2O2=2 OH
NO+ OH=HNO2
HNO2+(NH2)2CO=2N2+CO2+3H2O
NO+ OH=NO2+·H
NO+NO2+(NH2)2CO=2N2+CO2+2H2O
It addition, during the second oxidizing agent solution spraying inversely contacts with flue gas and mixes, the second oxidizing agent solution spray
The dust that mist can effectively trap in flue gas forms drop with heavy metal particles, and drop is charged under the effect of high voltage electric field, and
Moving under the effect of electric field force in dust collecting electrode, drop is enriched with on collecting polar plate and then forms the water of uniform easily collecting
Film.
In order to determine the assimilation effect of the second oxidizing agent solution, can be by small-scale test platform test absorbent to SO2
And NOXAssimilation effect.The reactor that test uses is self-control 60mm diameter Quartz glass packed absorber, loads 0.5m in tower
The random packing of height.Utilize pure N2、O2、NO、NO2And SO2Gas is simulated flue gas according to typical industry flue gas proportioning, control
Import SO processed2、NOXConcentration be respectively 4000ppmV and 1000ppmV, NOXMiddle NO accounting 90%, NO2Accounting 10%.Simulation cigarette
Gas is from entering into and up motion at the bottom of absorbing tower, absorbent is uniformly sprayed at packing layer by the nozzle being arranged in above packing layer
On, flue gas inversely contacts in packing layer with absorbent and carries out blended absorbent, flue gas finally discharge above absorption tower.Only
Simulated flue gas after change, after condenser cooling and being dried water outlet, uses comprehensive flue gas analyzer to measure SO in flue gas2And NOX
Concentration, calculates SO2And NOXAbsorption efficiency.
When individually using urea liquid as absorbent, the absorption efficiency of SO2 up to more than 99%, NOXAbsorbance only
Have about 30%.The main cause producing this phenomenon is NOXThe NO of middle accounting 90% is insoluble in water, NO soluble in water2Easily
React with urea liquid, contribute the absorbance of general 10%.O in flue gas2Can oxidized portion NO, generate NO2, this portion
Divide the absorbance of contribution general 20%.
In order to improve the urea liquid absorption efficiency to NO, experimental study NaCLO, KMnO4, H2O2Three kinds common oxidized
Agent addition agent, after being added to urea liquid, the clearance of NO is respectively 59%, and 92%, 55%.Test shows additive oxidisability
Can be the strongest, the lifting to NO absorption efficiency is the most obvious.
In actual applications, only H2O2There is not secondary pollution, production and application cost-effective, equipment anticorrosion is required relatively
Low, and H2O2Performance active, high voltage electric field can also be decomposed into the hydroxyl radical free radical that oxidisability is higher, hydroxyl radical free radical oxygen
Change ability is very strong, under the effect of hydroxyl radical free radical, therefore compares and other two kinds of oxidants, H2O2Oxidation effectiveness to NO
Best.
Comprehensive economy and the balance of assimilation effect, can obtain in the second oxidizing agent solution of the second spray thrower spray double
The second oxidizing agent solution obtained after oxygen water and the weight ratio of carbamide, i.e. hydrogen peroxide/carbamide blender mixing urea and hydrogen peroxide
Middle hydrogen peroxide and the weight ratio of carbamide, particularly as follows: the weight ratio of hydrogen peroxide be 3%wt～10%wt, the weight ratio of carbamide be 2%
Wt～8%wt.
In the present embodiment, the first spray thrower 21 is positioned at below the second spray thrower 31, say, that flue gas enters absorption tower
The first oxidizing agent solution that rear elder generation sprays with the first spray thrower 21 reacts, and the first oxidizing agent solution removes the SO in flue gas substantially2、
NO2And after part dust, heavy metal, the second oxidizing agent solution that flue gas sprays with the second spray thrower 31 again reacts, the second oxidation
Agent solution is removed in flue gas and is not readily dissolved in the pollutant such as the NO of water, dust and heavy metal.
In the present embodiment, smoke processing system based on hydrogen peroxide also includes separating and filtering device, separating and filtering device
It is arranged on absorption tower 10 outside, and connects with absorption tower 10, separating and filtering device oxygen after separating and filtering with smoke reaction
Agent solution.
In the present embodiment, separating and filtering device includes the first separating and filtering device 23 and the second separating and filtering device 36.
In the present embodiment, below the first spray thrower 21, be provided with the first catch tray 24, the first catch tray 24 for collect with
The first oxidizing agent solution after smoke reaction, in the present embodiment, the first catch tray 24 is at the bottom of the tower on absorption tower 10.First liquid collecting
Dish 24 connects with the first separating and filtering device 23, and the first separating and filtering device is for the liquid collected at the bottom for the treatment of column, i.e. with flue gas
Reacted first oxidizing agent solution, includes sulphuric acid and nitric acid with the first oxidizing agent solution after smoke reaction.
The separation product of the first separating and filtering device is: (1) sulphuric acid and nitric acid, in subsequent process, and can be through enrichment
Generate the industrial products of variable concentrations；(2) unreacted hydrogen peroxide solution, is passed in the first spray thrower in subsequent process again
Recycle；(3) dust, heavy metal particles, compressed in subsequent processes makes construction material after drying.
Be provided with the second catch tray 37 below second spray thrower 31, the second catch tray 37 for collect with smoke reaction after the
Titanium dioxide agent solution, the second separating and filtering device 36 connects with the second catch tray 37, and the second separating and filtering device 36 is used for processing
Second catch tray 37 collect liquid, i.e. with smoke reaction after the second oxidizing agent solution.
The separation product of the second separating and filtering device is: (1) unreacted hydrogen peroxide/carbamide, in subsequent processes
It is passed into again in the second spray thrower and recycles；(2) dust, heavy metal particles, in subsequent processes, can compress dry
Construction material is made after dry.
In the present embodiment, smoke processing system based on hydrogen peroxide also includes oxidizing agent solution blender 25, oxidant
Solution mixer 25 connects with the first spray thrower 21, hydrogen peroxide storage tank 22 and the first separating and filtering device 23 respectively, and oxidant is molten
Liquid mixer 25 is for mixing unreacted first oxidizing agent solution and the hydrogen peroxide storage tank of the first separating and filtering device 23 input
First oxidizing agent solution supplemented of 22 inputs, and mixed first oxidizing agent solution is input in the first spray thrower 21.
Further, in the present embodiment, the first oxidant during oxidizing agent solution blender 25 is input to the first spray thrower 21
In solution, the weight ratio of hydrogen peroxide is: 1%wt～10%wt, and the first oxidizing agent solution of this ratio removes SO in flue gas2And
NO2Efficiency higher.
In the present embodiment, discharge electrode uses lead-antimony alloy or 254SMO barbed nail corona electrode line；Dust collecting electrode uses honeycombed
Or the tube bank of circular acidproof conductive carbon fibre reinforced composite material；Absorption tower uses acid corrosion-resistant material to manufacture, the inwall on absorption tower
For having steel construction or the high strength glass steel layer of acid-proof coating.
Discharge electrode uses lead-antimony alloy barbed nail corona electrode line, near the prickle point electrode that radius of curvature is the least, due to
Loading high voltage electric field, local electric field strength exceedes the ionization field intensity of gas, makes flue gas that ionization and excitation to occur, occurs that corona is put
Electricity, excites the second oxidizing agent solution to form the hydroxyl radical free radical of a large amount of strong oxidizing property, also makes neighbouring fine drop lotus simultaneously
Electricity.
Certainly, in the present embodiment, smoke processing system based on hydrogen peroxide of the present utility model can also first pass through and remove
Dirt device 40 carries out dust removal process to flue gas；By heat exchanger 50, flue gas is carried out temperature regulation again, the cigarette after excess temperature regulates
Gas is passed in absorption tower 10 again；Finally, discharge through chimney 60 from the gas outlet effluent air on absorption tower.
In the present embodiment, the second spray thrower and the first spray thrower all can be set to the tubular type spray of a layer or multilamellar
Layer, and every layer of tubular type spraying layer all can be arranged as required to multiple atomizer, such as 10～40, at the work of atomizer
Under with, oxidizing agent solution forms the fine drop that fine drop, such as diameter are at 50～500 microns；First spray thrower spray is double
The straying quatity calculating formula of oxygen water is: FH2O2=2 × (FFlue gas×CSO2)/CH2O2；The mixing of second spray thrower spray hydrogen peroxide/carbamide
The straying quatity calculating formula of liquid is: F(NH2)2CO=1.5 × (FFlue gas×CNOx)/C(NH2)2CO.Wherein, F represents that volume flow, C represent dense
Degree.
In the present embodiment, the number of discharge electrode can arrange one or for multiple, if number is multiple, and Duo Gefang
Electrode is distributed in dust collecting electrode, and the bearing of trend of dust collecting electrode is identical with the circulating direction of flue gas or has certain angle；It addition,
In smoke processing system based on hydrogen peroxide, the dimensions of each several part and number etc. all can be entered according to the needs of Practical Project
Row is arranged, and here is omitted.
In other embodiments, when the air inlet on absorption tower is positioned at the bottom on absorption tower, and gas outlet is positioned at the top on absorption tower
During end, the first spray thrower may be located on the top of the second spray thrower, and this setup is first to process the NO in flue gas, then locates
SO in reason flue gas2And NO2, when processing the NO in flue gas, complicated component in flue gas, therefore this setup can reduce cigarette
The oxidation efficiency of NO and the absorption efficiency of oxidation product thereof in gas.
In other embodiments, when the air inlet on absorption tower is positioned at the side on absorption tower, and gas outlet is positioned at the another of absorption tower
Side, and when the second spray thrower and the first spray thrower level are disposed adjacent, the second spray thrower can be arranged near air inlet, it is possible to
To arrange near gas outlet, the preferably second spray thrower is arranged near gas outlet, and the first spray thrower is arranged near air inlet.
In other embodiments, separating and filtering device can only arrange one, and at this moment separating and filtering device directly and absorbs
At the bottom of the tower of tower connect, at the bottom of all absorbing towers of separating and filtering with smoke reaction after oxidizing agent solution；Second catch tray
All can arrange with selectivity with the first catch tray, when the second catch tray is arranged on below the first catch tray, at the bottom of the tower on absorption tower
Can be as the second catch tray.
In other embodiments, oxidizing agent solution blender can be arranged with selectivity, such as directly by the first separating and filtering
Device and the connection of the first spray thrower, say, that unreacted first oxygen directly the first separating and filtering device separating and filtering arrived
Agent solution is passed in the first spray thrower, and when so arranging, the first oxidizing agent solution concentration that the first spray thrower sprays is unstable
Fixed, the most unstable to the treatment effect of flue gas.
Certainly, in other embodiments, the second oxidant storage tank can also be water storage tank or hydrogen peroxide storage tank or carbamide storage
Tank or its combination；In the mixed solution that hydrogen peroxide/carbamide blender obtains, the weight ratio of hydrogen peroxide and carbamide all can basis
Being actually needed and be adjusted, here is omitted.
Embodiment two
Embodiment two discloses the method for the smoke processing system based on hydrogen peroxide disclosed in a kind of Application Example one,
Including step:
S10: make the first oxidizing agent solution absorb the SO in flue gas2And NO2；
S20: excite the second oxidizing agent solution to generate multiple hydroxyl radical free radicals；
S30: the NO in flue gas is soluble in the HNO of the second oxidizing agent solution with hydroxyl radical reaction generation2And NO2；
S40: make the second oxidizing agent solution absorb HNO2And NO2；
Dust and heavy metal in S50: the second oxidizing agent solution trapping flue gas obtain drop；
S60: assemble, after making to carry the droplets of dust and heavy metal, the moisture film forming easily collecting.
Exemplary, as it is shown in figure 1, the specific embodiment of smoke processing system based on hydrogen peroxide of the present utility model
Concrete applicable cases is as follows:
1, cleaner unit 40 carries out dust removal process to pending flue gas, removes the big dust particle of more than PM10 in flue gas, will
Dustiness in flue gas is reduced to about 100mg/Nm3；
2, heat exchanger 50 carries out temperature regulation to the flue gas after dedusting, flue-gas temperature is adjusted to certain interval interior, such as
35 DEG C～80 DEG C；
3, the first spray thrower 21 sprays hydrogen peroxide solution, makes tiny hydrogen peroxide droplet particles be evenly distributed on absorption tower
In, flue gas enters absorption tower from bottom air inlet, most SO in flue gas2And NO2Inversely contact mixed with hydrogen peroxide droplet particles
Merge and redox reaction quickly occurs, generate callable sulfuric acid solution and salpeter solution；
4, the first separating and filtering device 23 carries out separating and filtering process to the mixing liquid at the bottom of the tower of absorption tower 10, and will separate
The unreacted hydrogen peroxide solution obtained is passed in oxidizing agent solution blender 25 and recycles；
5, the second spray thrower 31 sprays hydrogen peroxide/urea mixed solution, makes tiny hydrogen peroxide/urea droplets be evenly distributed on
In high voltage electric field between discharge electrode 32 and dust collecting electrode 33, and hydrogen peroxide forms a large amount of strong oxidizing property under the effect of high voltage electric field
Hydroxyl radical free radical, when flue gas is by flue gas flow channel between discharge electrode, NO therein is prone to hydroxyl radical reaction formation
The HNO absorbed2And NO2, HNO2And NO2React with urea liquid and generate harmless N2And CO2；
6, the flue gas in flue gas flow channel inversely contacts with hydrogen peroxide/urea droplets and mixes, hydrogen peroxide/urea droplets trapping
The dust being not readily dissolved in water remaining in flue gas and heavy metal, and charged under the effect of high voltage electric field, and drop is at electric field force
Move under effect in dust collecting electrode 33, and be enriched with in dust collecting electrode 33 and then form uniform water film, carry dust and heavy metal
Moisture film be washed further to the second catch tray 37；
7, the second separating and filtering device 36 carries out separating and filtering process to the mixing liquid on the second catch tray 37, and will divide
It is passed into further in hydrogen peroxide/carbamide blender 35 from the unreacted hydrogen peroxide/urea liquid obtained and recycles；
8, the flue gas at the gas outlet 12 on absorption tower 10 has reached the emission request of national Specification, is directly over chimney
60 are discharged in air.
When reality is applied, SO in the industrial smoke at air inlet2Concentration range be 100ppmV～800ppmV, NOXDense
Degree scope is 100ppmV～1400ppmV, dust granules concentration be scope be 50mg/Nm3, through of the present utility model based on double
After the smoke processing system of oxygen water processes, SO in exiting flue gas2、NOXAnd the concentration of dust granules is respectively up to 100mg/Nm3、
100mg/Nm3、20mg/Nm3, preferably situation is up to 20mg/Nm3、50mg/Nm3、10mg/Nm3, country's mark can be fully met
The emission request of quasi-regulation, and whole during will not produce secondary pollution, meet environment protection requirement.
It will be apparent that according to engineering practice, SO2Removing system (the first spray thrower, the first oxidant storage tank,
One separating and filtering device) the most individually can be used for flue-gas desulfurizing engineering, NOXAnd dust removing system (the second spray thrower, discharge electrode,
Dust collecting electrode, the second oxidant storage tank, the second separating and filtering device) also can be individually used for flue gas desulfurization and denitrification and removing dust project.
Smoke processing system suitable application area based on hydrogen peroxide of the present utility model is wide, can cover electric power, petrochemical industry, iron and steel,
The industrial circles such as coal, pottery, metallurgy, are simultaneously applicable to all kinds of old system reform.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (8)
1. a smoke processing system based on hydrogen peroxide, including absorption tower, it is characterised in that:
The first spray thrower and the second spray thrower it is sequentially provided with between air inlet and the gas outlet on described absorption tower；
Described first spray thrower and the connection of the first oxidant storage tank, described first spray thrower is for spraying the first oxidation in flue gas
Agent solution, described first oxidizing agent solution is for absorbing SO soluble in water in flue gas2And NO2, described first oxidizing agent solution is
Hydrogen peroxide solution；
Described second spray thrower and the connection of the second oxidant storage tank, and it is provided with discharge electrode and dust below described second spray thrower
Pole, the shower nozzle direction of described second spray thrower is towards described discharge electrode and dust collecting electrode, and described second spray thrower is for passing through
The flue gas stating discharge electrode and dust collecting electrode sprays the second oxidizing agent solution, and described second oxidizing agent solution is for trapping the powder in flue gas
Dirt and heavy metal, described second oxidizing agent solution is the mixed solution of hydrogen peroxide and carbamide；
Being loaded with high voltage electric field between described discharge electrode and described dust collecting electrode, described discharge electrode and described dust collecting electrode are at described high pressure
Exciting described second oxidizing agent solution to form great amount of hydroxy group free radical under electric field action, described hydroxyl radical free radical is used for aoxidizing flue gas
In NO formed easily by described second oxidizing agent solution absorb HNO2And NO2, HNO2And NO2With in the second oxidizing agent solution
Carbamide reacts generation N further2And CO2。
2. smoke processing system based on hydrogen peroxide as claimed in claim 1, it is characterised in that:
Described second oxidant storage tank includes hydrogen peroxide storage tank and urea storage tank；
Described hydrogen peroxide storage tank and described urea storage tank all connect with one hydrogen peroxide/carbamide blender；
Described hydrogen peroxide/carbamide blender connects with described second spray thrower.
3. smoke processing system based on hydrogen peroxide as claimed in claim 2, it is characterised in that:
In the mixed solution that described hydrogen peroxide/carbamide blender obtains the weight ratio of hydrogen peroxide be 3%wt～10%wt, carbamide
Weight ratio is 2%wt～8%wt.
4. smoke processing system based on hydrogen peroxide as claimed in claim 3, it is characterised in that also include:
Separating and filtering device, is arranged on outside described absorption tower, and connects with described absorption tower, and described separating and filtering device is used for
Oxidizing agent solution after separating and filtering and smoke reaction.
5. smoke processing system based on hydrogen peroxide as claimed in claim 4, it is characterised in that:
Described separating and filtering device includes the second separating and filtering device and the first separating and filtering device, described second separating and filtering dress
Put the second oxidizing agent solution after separating and filtering and smoke reaction, described first separating and filtering device for separating and filtering with
The first oxidizing agent solution after smoke reaction, includes sulphuric acid and nitric acid with the first oxidizing agent solution after smoke reaction.
6. smoke processing system based on hydrogen peroxide as claimed in claim 5, it is characterised in that also include:
Oxidizing agent solution blender, separated with described first spray thrower, described first oxidant storage tank and described first respectively
Filter device connection, described oxidizing agent solution blender is for mixing the supplement first oxidation of described first oxidant storage tank input
Agent solution and unreacted first oxidizing agent solution of described first separating and filtering device input, and by mixed first oxidation
Agent solution is input in described first spray thrower.
7. smoke processing system based on hydrogen peroxide as claimed in claim 6, it is characterised in that:
Described first oxidant storage tank is hydrogen peroxide storage tank, and described oxidizing agent solution blender is input to described first spray thrower
In the first oxidizing agent solution in the weight ratio of hydrogen peroxide be: 1%wt～10%wt.
8. the smoke processing system based on hydrogen peroxide as according to any one of claim 1 to 7, it is characterised in that:
Described discharge electrode uses lead-antimony alloy or 254SMO barbed nail corona electrode line；
And/or；
Described dust collecting electrode uses honeycombed or the tube bank of circular acidproof conductive carbon fibre reinforced composite material；
And/or；
Described absorption tower uses acid corrosion-resistant material to manufacture, and the inwall on described absorption tower is steel construction or the height with acid-proof coating
Strength-Glass steel layer.
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| CN201620542500.2U CN205672767U (en) | 2016-06-06 | 2016-06-06 | A kind of smoke processing system based on hydrogen peroxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854567A (en) * | 2016-06-06 | 2016-08-17 | 科洋环境工程（上海）有限公司 | Flue gas treatment system and method based on hydrogen peroxide |
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2016
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854567A (en) * | 2016-06-06 | 2016-08-17 | 科洋环境工程（上海）有限公司 | Flue gas treatment system and method based on hydrogen peroxide |
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Granted publication date: 20161109 Effective date of abandoning: 20180914 |