CN106823752A - A kind of novel liquid-phase oxidative absorption method of denitration and system - Google Patents

A kind of novel liquid-phase oxidative absorption method of denitration and system Download PDF

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Publication number
CN106823752A
CN106823752A CN201710192309.9A CN201710192309A CN106823752A CN 106823752 A CN106823752 A CN 106823752A CN 201710192309 A CN201710192309 A CN 201710192309A CN 106823752 A CN106823752 A CN 106823752A
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gas
liquid
flue gas
oxidation
alkalies
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郑煜铭
张欢
钟鹭斌
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Institute of Urban Environment of CAS
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Institute of Urban Environment of CAS
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides

Abstract

The invention belongs to fume treatment and atmosphere pollution Prevention Technique field, a kind of novel liquid-phase oxidative absorption method of denitration and system are disclosed.Seawater generates strong oxidizing property liquid stream and alkalies stream respectively through Diaphragm Electrolysis Technology is modified.Strong oxidizing property liquid stream is first highly mixed with partial fume and is mixed to form micro-nano bubble solution, then forms oxidisability aerosol through atomizing spray, and generation oxidation reaction is inversely contacted with another part flue gas;Alkalies stream is passed directly into alkali formula absorption tower and forms alkaline aerosol through atomizing spray, and generation neutralization reaction is inversely contacted with the flue gas after oxidation, realizes denitrating flue gas.Low cost of the present invention, denitration efficiency are high, adaptability is good, can be applied to the denitration process of coastal area thermal power plant and ship tail gas.

Description

A kind of novel liquid-phase oxidative absorption method of denitration and system
Technical field
The invention belongs to fume treatment and atmosphere pollution Prevention Technique field, and in particular to a kind of novel liquid-phase oxidation is inhaled Receive method of denitration and system.
Background technology
With the development of process of industrialization, the nitrogen oxides that growing coal-burning power plant, diesel engine etc. give off(NO x ) It is to trigger acid rain, cause depletion of the ozone layer, cause one of major pollutants of environmental problem such as haze.It is migrated through atmospheric air circulation Conversion, can produce deposition in land, ocean and Freshwater ecosystems, have a strong impact on ecological environment, or even human health is constituted Threaten.Therefore, China since " 12 " plan, Chinese Ministry of Environmental Protection is just by NO x Atmosphere pollution overall control index is incorporated, it is right NO x The control of discharge capacity is also increasingly strict.
At present, to NO x The main treatment from fuel, combustion process is improved of emission control and burning post processing three in terms of exhibition Open.Consider from fuel is improved, inevitably resulting in cost using high-quality fuel increases, and uses alternative fuel at present in equipment skill Existing defects are gone back in art.Processed from combustion process and considered, low-NO_x combustion technology is always most widely used, economical and practical to arrange Apply, it can suppress and reduce NO to a certain extent x Generation, but overall denitration rate is 30% ~ 50% or so, it is impossible to meet to NO x Row Put the control requirement of concentration.Consider that setting up denitrating flue gas facility can reach NO from burning post processing x Emission request, is current First-selected emission reduction strategy, therefore it is control NO to develop a kind of flue gas denitrification system efficiently, inexpensive x The important research side of discharge To.
The gas denitrifying technology that countries in the world are researched and developed can be divided into Dry denitration and wet denitration from handling process Two classes.With SCR in Dry denitration technology(SCR)Technology is representative, is referred to the NO for having generated x It is reduced directly to N2 Process, the technical matters is ripe, and utilization rate is high, can process in flue gas 80%~95% NO x , it has been applied to various land and has set The denitrating flue gas field applied, but there are problems that investment high, catalyst inactivation, ammonia.Compared with SCR, wet scrubbing Technology has the advantages that investment all the time and operating cost is low, simple in equipment, and has obtained in flue gas desulfurization Extensive use.But due to the NO in combustion system discharge flue gas x , more than 95% exists with the form of NO, and NO is insoluble in water, tradition Wet scrubbing technology and do not apply to.Accordingly, it would be desirable to NO to be first oxidized to the NO of good water solubility2, then wash ability through absorbing liquid Effectively removal, wherein, NO is oxidized to NO2Key as the technology.
Oxidant for aoxidizing NO is broadly divided into gaseous oxidizing agent and the class of Oxygen in Liquid agent two.Gaseous oxidizing agent is main There is O3、ClO2Deng for example, patent CN101485957 discloses a kind of ozone oxygenation combined with double-tower washing being taken off to flue gas simultaneous desulfurization The method of nitre, the method first passes through the SO in alkali liquor absorption flue gas2, recycle ozone generator generation O3By the NO oxygen in flue gas Change, finally removed through alkali lye again, O3Although with very strong oxidisability, preferable denitration effect can be reached, due to its system Standby costly, equipment is complicated, cost is big, therefore the application is not promoted also.Oxygen in Liquid agent mainly have NaClO, NaClO2、HClO3、H2O2Deng for example, patent CN202860378U describes a kind of flue gas forces oxidation sweetening denitrification integral Technique, by NaClO and NaClO2Two kinds of mixture solutions aoxidize the NO in flue gas to flue gas spray as oxidation solution, then through alkali Liquid absorbing and removing, although the method can to a certain degree realize denitrating flue gas, in NaClO and NaClO2Cost and storage side Still there is limitation in face.In general, compared with gaseous oxidation, equipment needed for liquid phase oxidation is simple, is adapted to legacy equipment Property it is strong, cost of investment is low, in actual applications with more wide prospect.
To solve the cost and storage problem of Oxygen in Liquid agent, patent CN104043327A describes a kind of electro-catalysis desulfurization Method of denitration, the method is modified to it through electro-catalysis technology with seawater as raw material, and generation main component is the active water of NaClO, Desulphurization denitration is carried out to tail gas spray using this active water.The method reduces cost using seawater as raw material, while being liquid Phase oxidation agent provides online production.But due to the oxidisability of NaClO in active water be not enough in efficient oxidation tail gas it is water-soluble Poor NO, therefore denitration rate is significantly limited.In addition, the method does not consider that the neutralization of tail gas absorbs subsequently, the NO of generation2Not exclusively Absorption is likely to result in the secondary pollution of tail gas.
The content of the invention
Present invention seek to address that above mentioned problem, there is provided a kind of novel liquid-phase oxidative absorption method of denitration and system, can make Oxidant mixes with smoke height and mixes, and increases gas liquid interfacial area, and then promotes the increase of gas-liquid mass transfer efficiency, effectively removes smoke abatement Nitrogen oxides in gas;Oxidation is follow-up to increase tail gas absorption process, it is to avoid NO2Not exclusively absorb the secondary pollution for causing.
The method of the present invention and system are realized using following technical scheme:
A kind of novel liquid-phase oxidative absorption method of denitration, it is characterised in that including procedure below:
A1Sea-changed process:Seawater is through modified generation strong oxidizing property liquid stream and the alkalies stream of Diaphragm Electrolysis Technology;
A2Gas-liquid mixing process:Partial fume and A1Described in strong oxidizing property liquid stream highly mix mixing, form uniform micro- Nano bubble solution;
A3Oxidizing process:A2Described in micro-nano bubble solution through atomization generation oxidisability aerosol, it is inverse with another part flue gas To haptoreaction, by the NO oxidations of poorly water-soluble in flue gas, primary purification flue gas is generated;
A4N-process:A1Described in alkalies flow through atomization and form alkaline aerosol, with A3Described in primary purification flue gas it is inverse To haptoreaction, in the sour gas in flue gas and will absorb, generate double purification flue gas, realize denitrating flue gas.
Further, the oxidative components of described strong oxidizing property liquid stream are primarily present form for HClO.HClO/Cl‾ The electrode potential of (1.698V) oxidation-reduction pair is also better than higher than ClO  ̄/Cl  ̄ (0.841V), therefore the oxidisability of HClO ClO‾。
Further, the alkaline components of described alkalies stream are primarily present form for NaOH.
A kind of novel liquid-phase oxidative absorption denitrating system, it is characterised in that it is mainly included:Fume dust remover 2, micro-nano Rice Liqiud-gas mixing device 3, oxidation rinsing tower 4, alkali formula absorption tower 5, filter 6, the storage of diaphragm electrolysis reaction unit 7, oxidation solution Groove 8 and alkalies storage tank 9, wherein, fume dust remover 2, oxidation rinsing tower 4, alkali formula absorption tower 5 are connected successively by gas line Connect, micro-nano Liqiud-gas mixing device 3, barrier film electricity are connected by branch road between described fume dust remover 2 and oxidation rinsing tower 4 Solution reaction unit 7 is preposition to be connected with filter 6, rearmounted to be divided into two-way by liquid line, and micro-nano gas-liquid is sequentially connected all the way Mixing arrangement 3, oxidation rinsing tower 4, oxidation solution storage tank 8, another road are sequentially connected alkali formula absorption tower 5, alkalies storage tank 9, described Oxidation solution storage tank 8, alkalies the storage tank 9 micro-nano Liqiud-gas mixing device 3 of the company of returning, alkali formula absorption tower 5 respectively.
Further, described micro-nano Liqiud-gas mixing device 3 can make gas phase highly be mixed with liquid phase to mix, and form equal Even micro-nano bubble, bubble average grain diameter is at 500 nanometers(nm)~ 5 microns(μm)Between.
Further, atomizer 11 and solid packing are fitted with described oxidation rinsing tower 4, alkali formula absorption tower 5 12, for increasing gas liquid interfacial area.
Further, described filter 6 can be the series connection of one or more levels filtration treatment, and filtering accuracy can reach To 10 microns(μm)And it is following, for removing the sand particles in seawater and larger microorganism.
Further, described diaphragm electrolysis reaction unit 7 can be the collection of single diaphragm cell or two and the above Into.
Further, described diaphragm cell is mainly made up of cathode cavity and anode cavities, described cathode cavity and sun Pole is separated between chamber by cation-exchange membrane.
Further, described oxidation solution storage tank 8, alkalies storage tank 9 offer liquid discharge outlet 10, for oxidisability The discharge of waste liquid and alkaline waste liquor.
The operation principle of the present apparatus is:
After natural sea-water is pre-processed through filter, the sand particles in seawater and larger microorganism can be removed, it is defeated afterwards It is sent to diaphragm electrolysis reactor to be modified, modified anode cavities produce strong oxidizing property liquid stream, cathode cavity to produce alkalies stream, oxidisability Liquid circulates into micro-nano Liqiud-gas mixing device, and alkalies flows through lifting and is transported in alkali formula absorption tower.
Flue gas is divided into two parts afterwards through the solid particulate matter in fume dust remover removal flue gas, and part of smoke is led to Pipeline into oxidation rinsing tower is crossed, is gradually risen with air-flow;Another part enters micro-nano Liqiud-gas mixing device by pipeline, with Oxidisability liquid stream in micro-nano Liqiud-gas mixing device mixes mixing, forms uniform micro-nano bubble solution, then by pipeline Flue gas reverse haptoreaction of the feeding oxidation rinsing tower through rising in atomization generation oxidisability aerosol, with oxidation rinsing tower, by cigarette NO in gas is oxidized to NO2, generate primary purification flue gas.Primary purification flue gas is entered by the discharge of oxidation rinsing tower top through gas pipeline Enter alkali formula absorption tower and be gradually increasing with air-flow, with alkali formula absorption tower in through atomization generation the reverse haptoreaction of alkaline aerosol, By the NO in flue gas2Further removing, generates double purification flue gas, and double purification flue gas is discharged through alkali formula absorption tower top.
Reacted oxidation solution absorbs tower bottom and is discharged into oxidation solution storage from oxidation rinsing tower, alkali formula respectively with alkalies Groove, alkalies storage tank, micro-nano Liqiud-gas mixing device, alkali formula absorption tower can be respectively introduced through pipeline and realize that liquid circulation is used, Oxidation solution storage tank, alkalies reservoir bottom are equipped with liquid discharge outlet, the discharge for circulating waste liquid.
Further, the strong oxidizing property liquid stream effective chlorine density that diaphragm electrolysis reaction unit 7 described above is produced is 0.5 ~2.0 g/L。
Further, anode used by diaphragm electrolysis reaction unit 7 described above using surface scribble rare metal ruthenium, Iridium or two kinds of Ti electrodes of combined oxidation coating, negative electrode use nickel electrode.
The present invention has the following advantages that relative to prior art:
1)In diaphragm electrolysis reaction unit, by Diaphragm Electrolysis Technology to sea-changed, two strands of liquid streams of different nature are generated, point It is not strong oxidizing property liquid stream and alkalies stream, realizes application on site, it is to avoid artificial addition any chemical substance;
2)Can realize that gas-liquid two-phase highly mixes using micro-nano Liqiud-gas mixing device, increase gas liquid interfacial area, and then push away Liquid mass-transfer efficiency of taking offence increases, effectively the nitrogen oxides in removal flue gas;Next reduces liquid-gas ratio, and then reduces absorption tower body Product and floor space;
3)The present invention has good adaptability with legacy equipment, is easy to the transformation and optimization of existing equipment, improves nitrogen in flue gas The removal efficiency of oxide;
4)Low cost of the present invention, denitration efficiency is high, can be used for pushing away for ship tail gas and coastal area coal steam-electric plant smoke purified treatment Extensively.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is that the liquid phase oxidation described in embodiment of the present invention absorbs denitrating system structural representation.
In figure:2nd, fume dust remover;3rd, micro-nano Liqiud-gas mixing device;4th, oxidation rinsing tower;5th, alkali formula absorption tower;6、 Filter;7th, diaphragm electrolysis reaction unit;8th, oxidation solution storage tank;9th, alkalies storage tank;10th, liquid discharge outlet;11st, atomization spray Mouth;12nd, solid packing.
Specific embodiment
Embodiment 1 is the embodiment of the inventive method;Embodiment 2 and embodiment 3 are the embodiment of present system.
Embodiment 1
A kind of novel liquid-phase oxidative absorption method of denitration, with following steps:
A1Sea-changed process:Seawater generates two strands of liquid streams of different nature through Diaphragm Electrolysis Technology modification, respectively by force Oxidisability liquid stream and alkalies stream;
During sea-changed treatment, anode surface generation Cl2, further, Cl2The HClO of generation oxidisability is dissolved in anode cavities, Cathode surface generation OH  ̄.Because the obstruct of cation-exchange membrane is separated, only Na+Can pass freely through, anion cannot be saturating Cross.Therefore modified anode cavities generate acid solution, and oxidative components are main existing forms with HClO, and cathode cavity generation is alkaline Solution;
Master equation is as follows:
2Cl‾(aq)-2e‾→Cl2(g)
Cl2(g)↔Cl2(aq)
Cl2(aq)+H2O(l)↔HClO(aq)+HCl(aq)
2H2O(l)+2e‾→2OH‾(aq)+H2(g)
A2Gas-liquid mixing process:Partial fume and A1Described in strong oxidizing property liquid stream highly mix mixing, form uniform micro- Nano bubble solution;
Described strong oxidizing property liquid stream is generated in anode cavities, and it highly mixes with partial fume and mixes, and discharges uniform micro-nano Rice bubble, forms gas liquid mixture, and the gas liquid mixture has high surface energy, high mass transfer efficiency;
A3Oxidizing process:A2Described in micro-nano bubble solution through atomization generation oxidisability aerosol, it is inverse with another part flue gas To haptoreaction, by the NO oxidations of poorly water-soluble in flue gas, primary purification flue gas is obtained;
Mainly there is following chemical reaction in this process:
NO(g)↔NO(aq)
HClO(aq)+NO(aq)→NO2(aq)+HCl(aq)
A4N-process:A1Described in alkalies flow through atomization and form alkaline aerosol, with A3Described in primary purification flue gas it is inverse To contact, in the sour gas in flue gas and will absorb, generate double purification flue gas, realize denitrating flue gas.
Described alkalies stream is generated in cathode cavity, is passed through alkali formula absorption tower, through atomizer spray and primary purification cigarette The circulation of vital energy in the wrong direction is to haptoreaction by the NO in flue gas2Removal is absorbed, double purification flue gas is obtained.
Mainly there is following chemical reaction in this process:
2NO2(aq)+2OH‾(aq)→NO2‾(aq)+NO3‾(aq)+H2O(l)
Described double purification flue gas is discharged directly into air.
Embodiment 2
This example is used for the denitration process of flue gas, as shown in figure 1, a kind of novel liquid-phase oxidative absorption denitrating system, mainly includes: Fume dust remover 2, micro-nano Liqiud-gas mixing device 3, oxidation rinsing tower 4, alkali formula absorption tower 5, filter 6, diaphragm electrolysis Reaction unit 7, oxidation solution storage tank 8, alkalies storage tank 9.
The anode cavities outlet of described diaphragm electrolysis reaction unit 7 is sequentially connected micro-nano gas-liquid mixed by liquid line The fluid input port of device 3, oxidation rinsing tower 4, cathode cavity outlet is connected with the fluid input port on alkali formula absorption tower 5, described Diaphragm electrolysis reaction unit 7 is preposition to be connected with filter 6, and oxidation rinsing tower 4, the bottom on alkali formula absorption tower 5 are connected to oxidation respectively Liquid storage tank 8, alkalies storage tank 9, the micro-nano Liqiud-gas mixing device 3 of the company of returning, alkali formula are inhaled respectively for oxidation solution storage tank 8, alkalies storage tank 9 Receive tower 5.
The described exit gas line of electrostatic precipitator 2 is divided into two parts, respectively pipeline 101 and pipeline 102, institute The pipeline 101 stated is connected with the gas access end of oxidation rinsing tower 4, described pipeline 102 and micro-nano Liqiud-gas mixing device 3 Gas access end connects, and is connected by gas line between oxidation rinsing tower 4, alkali formula absorption tower 5.
Said system mainly includes in the application process of fume treatment:
Seawater removes the impurity such as sand particles therein through filter 6, its precision is 10 μm and less, and filter 6 goes out Water enters diaphragm electrolysis reaction unit, is 300 ~ 700 A/m in current density2Under conditions of produce strong oxidizing solution with alkalescence Solution.
Described strong oxidizing solution effective chlorine density is 0.5 ~ 2.0 g/L.
Described alkaline solution pH is 11 ~ 13.
NO concentration is 300 ~ 600 ppm in coal steam-electric plant smoke, and flue gas first passes through the solid during dust arrester removes flue gas Grain thing, afterwards flue gas be divided into two-way and respectively enter oxidation rinsing tower and micro-nano Liqiud-gas mixing device.
Described strong oxidizing solution is passed through micro-nano Liqiud-gas mixing device, with partial fume highly mix mixes Micro-nano gas-liquid mixed solution is formed, by the L/m of certain liquid-gas ratio 1 ~ 83Oxidation rinsing tower is pumped into, in oxidation rinsing tower Flue gas is inversely contacted, and the NO in oxidation flue gas is NO2, generate primary purification flue gas.
Described primary purification flue gas is discharged by oxidation rinsing top of tower and enters alkali formula absorption tower bottom through gas line, with Air-flow rises.Meanwhile, described alkaline solution is passed through alkali formula absorption tower, by the L/m of certain liquid-gas ratio 1 ~ 83By described alkalescence Solution pumps into alkaline washing tower, is inversely contacted with flue gas in alkali formula absorption tower, so that the sour gas absorbed in flue gas is neutralized, it is raw Into double purification flue gas.
Described double purification flue gas is directly discharged into air.
In the present embodiment, NO concentration is 550 ppm, the strong oxidizing solution effective chlorine density that seawater electrolysis is produced in flue gas It is 1.5 g/L, alkaline solution pH is 12.6, and liquid-gas ratio is respectively 4 L/m in oxidation rinsing tower, alkali formula absorption tower3、4 L/m3When, Denitration efficiency is 91.3%.
Embodiment 3
This example is used for the denitration process of ship tail gas, as shown in figure 1, the system is same as Example 2, difference is Treatment flue gas is ship tail gas.
The application process that said system is processed in ship, mainly includes:
Seawater removes sand particles therein, larger microorganism etc. through filter 6, and its precision is 10 μm and following, filtering dress The water outlet for putting 6 enters diaphragm electrolysis reaction unit, is 300 ~ 700 A/m in current density2Under conditions of produce strong oxidizing property it is molten Liquid and alkaline solution.
Described strong oxidizing solution effective chlorine density is 0.5 ~ 2.0g/L.
Described alkaline solution pH is 11 ~ 13.
NO concentration is 900 ~ 1400 ppm in ship tail gas, and tail gas first passes through dust arrester and removes solid particle therein Thing, afterwards tail gas be divided into two-way and respectively enter oxidation rinsing tower and micro-nano Liqiud-gas mixing device.
Described strong oxidizing solution is passed through micro-nano Liqiud-gas mixing device, with partial tail gas highly mix mixes Micro-nano gas-liquid mixed solution is formed, by the L/m of certain liquid-gas ratio 1 ~ 83Oxidation rinsing tower is pumped into, in oxidation rinsing tower Tail gas is inversely contacted, and the NO in oxidized tail gas is NO2, generate primary purification tail gas.
Described primary purification tail gas is discharged by oxidation rinsing top of tower and enters alkali formula absorption tower bottom through gas line, with Air-flow rises.Meanwhile, described alkaline solution is passed through alkali formula absorption tower, by the L/m of certain liquid-gas ratio 1 ~ 83By described alkalescence Solution pumps into alkaline washing tower, is inversely contacted with alkali formula absorption tower inner exhaust gas, so that the sour gas absorbed in tail gas is neutralized, it is raw Into double purification tail gas.
Described double purification tail gas is directly discharged into air.
In the present embodiment, NO concentration is 1050 ppm in flue gas, and the strong oxidizing solution effective chlorine that seawater electrolysis is produced is dense It is 1.5 g/L to spend, and alkaline solution pH is 12.6, and liquid-gas ratio is respectively 6 L/m in oxidation rinsing tower, alkali formula absorption tower3、6 L/m3 When, denitration efficiency is 93.5%.

Claims (11)

1. a kind of novel liquid-phase oxidative absorption method of denitration, it is characterised in that including procedure below:
A1Sea-changed process:Seawater generates strong oxidizing property liquid stream and alkalies stream through Diaphragm Electrolysis Technology modification;
A2Gas-liquid mixing process:Partial fume and A1Described in strong oxidizing property liquid stream highly mix mixing, form uniform micro-nano Rice bubble solution;
A3Oxidizing process:A2Described in micro-nano bubble solution through atomization generation oxidisability aerosol, it is reverse with another part flue gas Haptoreaction, by the NO oxidations of poorly water-soluble in flue gas, generates primary purification flue gas;
A4N-process:A1Described in alkalies flow through atomization and form alkaline aerosol, with A3Described in primary purification flue gas it is inverse To haptoreaction, in the sour gas in flue gas and will absorb, generate double purification flue gas, realize denitrating flue gas.
2. a kind of novel liquid-phase oxidative absorption method of denitration according to claim 1, it is characterised in that:Described Strong oxdiative Property liquid stream oxidative components be primarily present form for hypochlorous acid, the alkaline components of described alkalies stream are primarily present form and are NaOH.
3. a kind of novel liquid-phase oxidative absorption method of denitration according to claim 1 and 2, described strong oxidizing property liquid stream has Effect cl concn is 0.5 ~ 2.0 g/L, and described alkalies stream pH is 11 ~ 13.
4. a kind of novel liquid-phase oxidative absorption denitrating system, it is characterised in that it is mainly included:Fume dust remover(2), micro-nano Rice Liqiud-gas mixing device(3), oxidation rinsing tower(4), alkali formula absorption tower(5), filter(6), diaphragm electrolysis reaction unit (7), oxidation solution storage tank(8)With alkalies storage tank(9), wherein, fume dust remover(2), oxidation rinsing tower(4), alkali formula absorb Tower(5)It is sequentially connected by gas line, described fume dust remover(2)With oxidation rinsing tower(4)Between by branch road connect Connect micro-nano Liqiud-gas mixing device(3), diaphragm electrolysis reaction unit(7)It is preposition to be connected with filter(6), it is rearmounted by liquid line Line is divided into two-way, and micro-nano Liqiud-gas mixing device is sequentially connected all the way(3), oxidation rinsing tower(4), oxidation solution storage tank(8), it is another Road is sequentially connected alkali formula absorption tower(5), alkalies storage tank(9), described oxidation solution storage tank(8), alkalies storage tank(9)Return respectively Connect micro-nano Liqiud-gas mixing device(3), alkali formula absorption tower(5).
5. a kind of novel liquid-phase oxidative absorption denitrating system according to claim 4, it is characterised in that:Described flue gas is removed Dirt device(2)It is any one in electrostatic precipitator, wet dust separater, cyclone dust collector.
6. a kind of novel liquid-phase oxidative absorption denitrating system according to claim 4, it is characterised in that:Described is micro-nano Liqiud-gas mixing device(3)Gas phase can be made highly to be mixed with liquid phase mix, uniform micro-nano bubble, bubble average grain diameter is formed At 500 nanometers(nm)~ 5 microns(μm)Between.
7. a kind of novel liquid-phase oxidative absorption denitrating system according to claim 4, it is characterised in that:Described oxidation is washed Wash tower(4), alkali formula absorption tower(5)Inside it is fitted with atomizer(11)And solid packing(12).
8. a kind of novel liquid-phase oxidative absorption denitrating system according to claim 4, it is characterised in that:Described filtering dress Put(6)Can be the series connection of one or more levels filtration treatment, filtering accuracy reaches 10 microns(μm)And it is following, for removing seawater In sand particles and larger microorganism.
9. a kind of novel liquid-phase oxidative absorption denitrating system according to claim 4, it is characterised in that:Described barrier film electricity Solution reaction unit(7)Can be the integrated of single diaphragm cell or two and the above.
10. diaphragm cell according to claim 9, it is characterised in that:Described diaphragm cell is by cathode cavity and sun Pole chamber constitutes, and is separated by cation-exchange membrane between described cathode cavity and anode cavities.
A kind of 11. novel liquid-phase oxidative absorption denitrating systems according to claim 4, it is characterised in that:Described oxidation Liquid storage tank(8), alkalies storage tank(9)Offer liquid discharge outlet(10).
CN201710192309.9A 2017-03-28 2017-03-28 A kind of novel liquid-phase oxidative absorption method of denitration and system Pending CN106823752A (en)

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