CN109316915A - A kind of application of discharge reactor in removal nitrogen oxides of exhaust gas - Google Patents
A kind of application of discharge reactor in removal nitrogen oxides of exhaust gas Download PDFInfo
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- CN109316915A CN109316915A CN201811172302.1A CN201811172302A CN109316915A CN 109316915 A CN109316915 A CN 109316915A CN 201811172302 A CN201811172302 A CN 201811172302A CN 109316915 A CN109316915 A CN 109316915A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/32—Separation 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 by electrical effects other than those provided for in group B01D61/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
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Abstract
The invention discloses a kind of application of discharge reactor in removal nitrogen oxides of exhaust gas, the absorption liquid circulating device that the discharge reactor includes hollow shell, the shell intracorporal exoelectrical reaction area and is connect by the shell with the exoelectrical reaction area, absorbing liquid can flow from above to below to form absorbing liquid liquid film along grounding electrode plate by the absorption liquid circulating device.The distance between described discharge electrode and grounding electrode plate constitute the airflow channel of gas processed, the space length can be with dynamic regulation, when the air-flow of nitrogen-containing oxide class gaseous pollutant passes through the gas discharge reaction zone between the electrode pair, the pollutant is oxidized and degrades, catabolite or intermediate product are absorbed by the absorbing liquid liquid film, and purified air-flow is discharged by gas vent.Device of the present invention reduces equipment and use cost, improves reliability.
Description
Technical field
The present invention relates to a kind of application of discharge reactor in removal nitrogen oxides of exhaust gas, in particular to nitric oxide
Removal, belong to Air Pollution Control and environmental protection technical field.
Background technique
Nitrogen oxides (the NO that mankind's activity generatesx) it mainly include NO and NO2, wherein accounting for 90% by what fuel combustion generated
More than, followed by industrial process such as nitric acid production, the nitration reaction of chemical pharmaceutical, metal surface and semiconductor processes.NOx is to people
There is one of the main reason for intoxicating effect, a large amount of discharged nitrous oxides still cause atmospheric photochemistry mist and acid rain.
Generally, the nitrous oxides concentration in flue gas that thermal power plant etc. is generated with combustion of fossil fuel is about several hundred arrives
Thousands of ppm, wherein 95% or more is nitric oxide.Selective catalysis conversion method (SCR) is the current master for administering flue gas NOx at present
Want one of means, but catalyst requires service condition stringent, needs ammonia as reducing agent, contains sulfide and dust in air-flow
It is very big Deng the aging effects to catalyst, especially to very high as the operating cost of the thermal power plant of fuel using coal；Wet process is to use
Various liquid absorb NOx, are the main methods of discharged at lower temperature source processing, mainly there is oxidation absorption process and reducing absorping method
Two kinds, wherein oxidizing process is to be used as oxidative absorption agent using hydrogen peroxide, sodium hypochlorite and potassium permanganate etc., is carried out at absorption
Reason；Reduction method is to carry out absorption processing as reducing agent using sodium sulfite, vulcanized sodium and urea etc..But to containing nitric oxide
More nitrogen oxides, due to the solubility very little of nitric oxide in the solution, absorption efficiency is lower.Therefore, research and development improve
The purification techniques of Novel flue gas nitrogen oxides is urgent problem in skilled industry application.
The nonequilibrium plasma generated by gas discharge has started as a new waste gas Treatment process in industrial mistake
Cheng Yingyong, the basic principle is that generating a large amount of high energy electrons, atom and free radical using gas discharge.These high energy electrons, original
Son and free radical react with pernicious gas molecule and it are made to aoxidize or dissociate.Although pulsed gas discharge is a kind of very effective
The producing method of plasma, but due to the technical requirements of pulse power height, thus it is difficult to large-scale application in the industry.
Summary of the invention
The object of the present invention is to provide a kind of application of discharge reactor in removal nitrogen oxides of exhaust gas.
Discharge reactor described in discharge reactor of the present invention includes hollow shell, the shell is intracorporal puts
Electric reaction zone and the absorption liquid circulating device being connect by the shell with the exoelectrical reaction area, the shell are equipped with gas
Body entrance and gas vent；The enclosure interior constitutes airflow channel, and the airflow channel bottom is exported equipped with absorbing liquid,
The absorbing liquid outlet is connected to absorbing liquid circulating slot；The inner walls are equipped with grounding electrode plate, the ground connection electricity
One or more groups of discharge electrode groups parallel or vertical with the airflow direction, the discharge electrode group are provided between pole plate
It is made of the discharge electrode of central electrode stick and several parallel arrangements being fixed on the central electrode stick, the electric discharge electricity
Pole is uniformly distributed from top to bottom using central electrode stick as symmetry axis, and the gas between the grounding electrode plate and discharge electrode is logical
Road constitutes the exoelectrical reaction area；
The absorption liquid circulating device includes the inlet tube and the feed liquor that one end is connect with the exoelectrical reaction area
Circulating pump, absorbing liquid circulating slot and the deflector of pipe connection form, and described inlet tube one end is connect with absorbing liquid entrance, the other end
It is connected to by circulating pump with the absorbing liquid circulating slot, it is separate that the absorbing liquid entrance is located at the grounding electrode plate side
That one end of absorbing liquid outlet, the deflector is located in the exoelectrical reaction area at absorbing liquid entrance fluid outlet, described
Deflector the position liquid stream that enters the absorbing liquid entrance it is electric along the ground connection by the guidance of the deflector
Polar board surface uniformly flows from above to below；
The central electrode stick and motor axis connection, the central electrode stick are electrically connected with high voltage power supply；Described puts
Electric reactor is integrally in airtight closes.
Further, it is preferred that discharge reactor of the present invention includes hollow shell, the intracorporal electric discharge of the shell
Reaction zone and the absorption liquid circulating device being connect by the shell with the exoelectrical reaction area, the shell are hollow rectangular
Body structure, the shell are equipped with gas access, gas vent；The enclosure interior constitutes airflow channel, the gas
Circulation road two sides inner wall is symmetrically arranged with grounding electrode plate along airflow direction, and the airflow channel bottom is in back taper, described
Airflow channel bottom exported equipped with absorbing liquid, the described absorbing liquid outlet is connected to absorbing liquid circulating slot；The ground connection electricity
One or more groups of discharge electrode groups parallel with the airflow direction are provided between pole plate, the discharge electrode group is by center
The discharge electrode of electrode bar and several parallel arrangements being fixed on the central electrode stick forms, and the discharge electrode is in
Heart electrode stick is that symmetry axis is uniformly distributed from top to bottom, and the gas passage between the grounding electrode plate and discharge electrode is constituted
The exoelectrical reaction area；
The absorption liquid circulating device includes the inlet tube and the feed liquor that one end is connect with the exoelectrical reaction area
Circulating pump, absorbing liquid circulating slot and the deflector of pipe connection form, and described inlet tube one end is connect with absorbing liquid entrance, the other end
It is connected to by circulating pump with the absorbing liquid circulating slot, it is separate that the absorbing liquid entrance is located at the grounding electrode plate side
That one end of absorbing liquid outlet, the deflector is located in the exoelectrical reaction area at absorbing liquid entrance fluid outlet, described
Deflector the position liquid stream that enters the absorbing liquid entrance it is electric along the ground connection by the guidance of the deflector
Polar board surface uniformly flows from above to below；
The central electrode stick and motor axis connection, the central electrode stick are electrically connected with high voltage power supply；Described puts
Electric reactor is integrally in airtight closes.
Further, it is preferred that discharge reactor of the present invention includes hollow shell, the intracorporal electric discharge of the shell
Reaction zone and the absorption liquid circulating device being connect by the shell with the exoelectrical reaction area, the shell of the discharge reactor
It is in vivo hollow tube structure, the regular polygon that the cross section of the tube structure is centrosymmetric, the cylinder inboard wall
For grounding electrode plate；The housing bottom is respectively equipped with gas access and absorbing liquid outlet, and the upper part of the housing is set respectively
There are gas vent and absorbing liquid entrance；The absorbing liquid entrance is distributed on each side of the shell, described
Inner barrel constitutes airflow channel, is equipped with one or more groups of discharge electrodes vertical with airflow direction in the airflow channel
Group, the discharge electrode group is by central electrode stick and the discharge electrode of several parallel arrangements being fixed on the central electrode stick
Composition, the discharge electrode is uniformly distributed from top to bottom using central electrode stick as symmetry axis, the grounding electrode plate with put
Gas passage between electrode constitutes exoelectrical reaction area；
The absorption liquid circulating device includes the inlet tube and the feed liquor that one end is connect with the exoelectrical reaction area
Circulating pump, absorbing liquid circulating slot and the deflector of pipe connection form, and described inlet tube one end is connect with absorbing liquid entrance, the other end
It is connected to by circulating pump with the absorbing liquid circulating slot, it is separate that the absorbing liquid entrance is located at the grounding electrode plate side
That one end of absorbing liquid outlet, the deflector is located in the exoelectrical reaction area at absorbing liquid entrance fluid outlet, described
Deflector the position liquid stream that enters the absorbing liquid entrance it is electric along the ground connection by the guidance of the deflector
Pole plate flows from above to below；
The central electrode stick and motor axis connection, the central electrode stick are electrically connected with high voltage power supply；Described puts
Electric reactor is integrally in airtight closes.
Further, the application are as follows: high voltage is applied to the discharge electrode, electric discharge is driven under the action of motor
Electrode rotation, starting absorb liquid circulating device, and the absorbing liquid enters feed liquor from absorbing liquid circulating slot by circulation pump circulation
Then pipe flows into the inner cavity of the discharge reactor, the grounding electrode plate from absorbing liquid entrance along grounding electrode plate
Surface forms uniform absorbing liquid liquid film, is passed through gas to be processed, institute from the gas access of described discharge reactor one end
The gas to be processed stated is oxidized or degrades when passing through the exoelectrical reaction area, the water-soluble intermediate product or water of degradation process
The absorbing liquid liquid film that dissolubility final product is formed on the grounding electrode absorbs, to achieve the purpose that degradation.
The exhaust gas of nitrogen-containing oxide of the present invention is generally combustion of fossil fuel flue gas (including various internal combustion engines), can also
To be the exhaust gas of each production technology discharge such as metallurgy, building materials and chemical pharmaceutical, it is mainly nitric oxide that the nitrogen, which supports compound,
The oxidants such as oxygen, aqueous vapor or argon gas etc. can be added in treatment process to improve nitric oxide production oxygenation efficiency, specifically optionally
Using.
The absorbing liquid is the mixture of the aqueous solution of alkaline matter or the aqueous solution of alkaline matter and reducing agent, described
Alkaline matter be sodium hydroxide, sodium hydroxide potassium, calcium hydroxide, sodium carbonate, potassium carbonate or calcium carbonate, the reducing agent is
Sodium sulfite and urea make the nitrogen oxides after absorbing that can be reduced to nitrogen.The absorbing liquid can also be made using the concentrated sulfuric acid
For absorbing liquid, for using the concentrated sulfuric acid, as absorbing liquid, grounding electrode can also be used acid resisting material, including plastics, glass reinforced plastic and
Ceramics etc., can be conductive by the absorption liquid film on electrode.Specifically corresponding absorbing liquid can be selected according to different processing requirements.One
As the absorbing liquid flow electrode surface formation thickness of liquid film be 1-5mm, specifically can optionally adjust.
Further, the deflector is rectangular slab, the deflector and the grounding electrode plate upper half
Divide and form angle, and the angle is acute angle, it is described there are making between the deflector and the grounding electrode plate
Absorbing liquid is by deflector along the gap that the grounding electrode plate flows, the rectangular slab and the shell dimension
Match.
Further, the discharge electrode and the material of grounding electrode plate include that stainless steel, titanium, tungsten, lead and alloy etc. are led
The metal material and related compound material of the good and corrosion-resistant and resistance to electric discharge of electricity, the gas discharge performance substantially phase of the material
When.
Distance replaces variation, the variation of the distance between discharge electrode of the present invention and the grounding electrode plate
Speed can be adjusted optionally, and revolving speed is fast, and energy input is big, nitric oxide production high conversion rate, specifically depending on operating parameter, no spy
It is different to require, the pace of change of the general motor at 3000 revs/min hereinafter, it is preferred that 50-300 revs/min, revolving speed 500 turns/
Point or more when, removal rate actual effect increase rate is little；The frequency adjusted by earthing pole liquid membrane is roughly the same, can fit
When slow.
Further, the power supply mode of the discharge electrode is generally direct current (containing high-frequency impulse), is also possible to pulse, effect
About the same, wherein direct current supply voltage is generally positive 1kV or more, or negative -1kV is hereinafter, it is preferred that ± 10kV- ± 150kV, just
The effect of voltage and negative voltage is about the same, and positive voltage is a little better, the pulse recurrence frequency of pulse power supply be generally 1Hz with
On, preferably 10Hz-500Hz, frequency increases, and input energy increases, and the nitric oxide production conversion ratio improves, and pulse repeats frequency
When rate is 500Hz or more, actual effect increase rate is less.Electrode application voltage is related with electrode spacing, and interelectrode distance is got over
Greatly, applying voltage can be higher, the general every increase 10mm of electrode distance, and voltage can increase 5kV-10kV, and the release of voltage high-energy is big,
Nitric oxide production high conversion rate.
Further, residence time of the gas processed of the present invention in the exoelectrical reaction area be generally 0.2s with
On, the residence time is longer, and effect is better, preferably 3s-120s, and more than 120s, nitric oxide production conversion ratio increase rate becomes smaller.
Compared with prior art, the invention has the advantages that by between dynamic regulation grounding electrode plate and discharge electrode
Distance makes gas discharge, and DC power supply can be used instead of high-voltage pulse power source, reduce equipment investment and use cost, improves
System operation reliability, the nitric oxide in air-flow are oxidized to be grounded the absorbing liquid liquid film institute of pole surface after sulfur trioxide
It absorbs, dilute sulfuric acid can be recycled, realize recycling for resource.
Detailed description of the invention
Fig. 1 is a kind of gas discharge reactor schematic diagram that the present invention uses；
Fig. 2 is a kind of sectional view for gas discharge reactor that the present invention uses；
Fig. 3 is a kind of straight tube shape gas discharge reactor schematic diagram that the present invention uses；
Fig. 4 is a kind of sectional view for straight tube shape gas discharge reactor that the present invention uses.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
In figure: 1 gas access；2 high voltage power supply connecting lines；3 motors；4 inlet tubes；5 central electrode sticks；6 deflectors；7 gas
Body outlet；8 filling openings；9 absorbing liquid circulating slots；10 leakage fluid drams；11 discharge electrodes；12 grounding electrode plates；13 circulating pumps.
Embodiment 1:
A kind of gas discharge reactor is as depicted in figs. 1 and 2.Reactor is about 500mm (unit is similarly hereinafter), wide about 120mm,
High about 250mm, integral sealing, inleakage is less than 1%.Gas flow is single channel, and two sidelining grounding electrode plate 12 of channel is put
Electric reaction zone effective length about 250mm is evenly equipped with 3 groups of electrodes along runner in channel, and two adjacent groups central electrode stick distance is about
100mm, every group of electrode is by 9 symmetrical discharge electrodes 11 (two adjacent discharge electrode distances are about 20mm) and 5 groups of central electrode stick
At electrode material is stainless steel, and 11 surface of discharge electrode is steel alloy, and for discharge electrode having a size of Φ 5 × 50, electrode both ends are half
Ball, axial uniformly distributed along central electrode stick 5, the central electrode stick 5 is having a size of Φ 10 × 250, central electrode stick and motor 3
Axis connection is rotated under the drive of motor 3, and is connected to by spring pressuring plate mechanism with high voltage power supply, can by adjusting 3 revolving speed of motor
To adjust gas discharge frequency, discharge reactor top is provided with deflector 6, makes the grounding electrode on the discharge reactor both sides
12 surface of plate forms uniform pickup liquid liquid film, and the absorbing liquid is collected by the absorbing liquid circulating slot 9 of reactor lower part, can be by following
Ring pump 13 is recycled.
Processing technological flow is that the air-flow of nitrogen-containing oxide to be processed is imported the exoelectrical reaction by gas access 1
Device connect high voltage power supply connecting line 2 with high voltage power supply, and the grounding electrode plate 12 of the gas flow two sides of discharge reactor is connect
Ground imports the absorbing liquid in absorbing liquid circulating slot 9 by circulating pump 13 and inlet tube 4 water conservancy diversion on gas discharge reactor top
Plate 6, the deflector are rectangular slab, and the deflector and the grounding electrode plate top half form angle, and
The angle is acute angle, and there are so that the absorbing liquid is passed through water conservancy diversion between the deflector and the grounding electrode plate
Plate matches along the gap that the grounding electrode plate flows, the rectangular slab with the shell dimension, makes described
12 surface of grounding electrode plate on reactor both sides forms uniform pickup liquid liquid film, and after motor 3 is powered, motor 3 passes through central electrode
Stick 5 drive discharge electrode 11 rotate, when 11 both ends of discharge electrode apart from grounding electrode plate 12 apart from it is nearest when, the discharge electrode
Gas moment between 11 and grounding electrode plate 12 is ionized, and forms the gas being made of high energy electron, atom and free radical etc.
The air-flow of region of discharge, the sulfur-bearing or halogen gaseous pollutant that import from the gas access 1 passes through the exoelectrical reaction area
When, the gaseous pollutant in air-flow is oxidized and degrades, and the catabolite of the gaseous pollutant is grounded electrode plate 12 simultaneously
The absorbing liquid liquid film on surface absorbs, and is removed from air-flow, and purified air-flow is discharged by gas vent 7.The reaction
The absorbing liquid circulating slot 9 of device lower part is provided with filling opening 8 and leakage fluid dram 10, after the absorbing liquid is collected by absorbing liquid circulating slot 9
It can be recycled.
Experiment condition are as follows: boiler combustion flue gas, flow about 5m3/ h, wherein oxygen about 8% (volume, similarly hereinafter), carbon dioxide
About 12%, moisture about 10%, nitric oxide gas inlet concentration is about 500mg/m3, the gas feed of flue gas stream is about 70
DEG C, initial absorption liquid is 5% sodium hydroxide lye (quality, similarly hereinafter), and absorbing flow quantity is about 30L/h, and electrode power supply mode is
Positive direct-current power supply, voltage about 35kV, power about 100W.
Experimental result is that the exit concentration of nitrogen oxides is about 30mg/m3。
Embodiment 2: absorbing liquid is 95% concentrated sulfuric acid, and power parameter: electrode power supply mode is negative DC power supply, DC voltage
About negative 30-35kV, power about 100W.Other conditions are the same as embodiment 1.
Experimental result is that the exit concentration of nitrogen oxides is about 38mg/m3。
Embodiment 3: a kind of straight tube shape gas discharge reactor is as shown in Figure 3 and Figure 4.Reactor is six side straight tube shapes, instead
The high about 300mm of device is answered, for cylinder material for stainless steel and as grounding electrode plate, the hexagonal external diameter of a circle is about Φ
120mm, exoelectrical reaction area effective length about 200mm, 1 group of electrode is arranged in body centre, by 9 11 (two-phases of symmetrical discharge electrode
Adjacent discharge electrode interval about 20mm) and central electrode stick 5 form, material is stainless steel, and discharge electrode surface is steel alloy, electric discharge
11 size of electrode is about Φ 5 × 35, and both ends are semi-round ball, along axial uniformly distributed, described 5 ruler of central electrode stick of central electrode stick 5
Very little is Φ 10 × 300, the central electrode stick 5 and 3 axis connection of high voltage power supply and motor, rotates, passes through under the drive of motor 3
It adjusts 11 revolving speed of discharge electrode and adjusts gas discharge frequency.The discharge reactor top is provided with deflector 6, the water conservancy diversion
Plate 6 is rectangular slab, and the deflector 6 and 12 top half of grounding electrode plate form angle, and the angle
For acute angle, between the deflector 6 and the grounding electrode plate 12 there are make the absorbing liquid by deflector 6 along
The gap that the grounding electrode plate 12 flows, the rectangular slab match with the shell dimension, make the reaction
The grounding electrode plate surface of six side inner cylinder of device forms uniform pickup liquid liquid film, and the absorbing liquid is by under the discharge reactor
The absorbing liquid circulating slot 9 in portion is collected, and absorbing liquid can be recycled by circulating pump 13.
Processing technological flow is that the air-flow of nitrogen-containing oxide to be processed is imported the exoelectrical reaction by gas access 1
Device connect high voltage power supply connecting line 2 with high voltage power supply, and the grounding electrode plate 12 of the gas flow two sides of discharge reactor is connect
Ground imports the absorbing liquid in absorbing liquid circulating slot 9 by circulating pump 13 and inlet tube 4 water conservancy diversion on gas discharge reactor top
Plate 6 makes 12 surface of grounding electrode plate on the reactor both sides form uniform pickup liquid liquid film, and after motor 3 is powered, motor 3 is logical
Cross central electrode stick 5 drive discharge electrode 11 rotate, when 11 both ends of discharge electrode apart from grounding electrode plate 12 apart from it is nearest when, institute
The gas moment stated between discharge electrode 11 and grounding electrode plate 12 is ionized, and is formed by high energy electron, atom and free radical etc.
The gas-discharge zone of composition, the air-flow of the sulfur-bearing or halogen gaseous pollutant that import from the gas access 1 is by described
When exoelectrical reaction area, the gaseous pollutant in air-flow is oxidized and degrades, and the catabolite of the gaseous pollutant is connect simultaneously
The absorbing liquid liquid film on 12 surface of ground electrode plate absorbs, and is removed from air-flow, and purified air-flow passes through 7 row of gas vent
Out.The absorbing liquid circulating slot 9 of the reactor lower part is provided with filling opening 8 and leakage fluid dram 10, and the absorbing liquid is followed by absorbing liquid
Annular groove 9 can be recycled after collecting.
Experiment condition are as follows: boiler combustion flue gas, flow about 3m3/ h, wherein oxygen about 8%, carbon dioxide about 12%, moisture
About 10%, nitrogen oxides (containing 95% nitric oxide), gas inlet concentration was about 600mg/m3, the gas feed of flue gas stream is about
It is 70 DEG C, initial absorption liquid is clear water, and absorbing flow quantity is about 20L/h, and electrode power supply mode is positive DC power supply, and voltage is about
30kV, power about 60W, rotating electric machine revolving speed are about 50 revs/min.
Experimental result is that the exit concentration of nitrogen oxides is about 65mg/m3。
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention, protection scope of the present invention is not
It is limited to this.All within the spirits and principles of the present invention, it modifies to technical solution documented by each embodiment, or to it
In some technical characteristics carry out any equivalent replacement, modification, changes and improvements etc., should be included in protection scope of the present invention
Within.
Claims (10)
1. a kind of application of discharge reactor in removal nitrogen oxides of exhaust gas, the discharge reactor includes hollow shell
Absorption liquid circulating device body, the shell intracorporal exoelectrical reaction area and connect by the shell with the exoelectrical reaction area,
The shell is equipped with gas access and gas vent；The enclosure interior constitutes airflow channel, the airflow channel
Bottom is exported equipped with absorbing liquid, and the absorbing liquid outlet is connected to absorbing liquid circulating slot；The inner walls are equipped with ground connection
Electrode plate is provided with one or more groups of discharge electrodes parallel or vertical with the airflow direction between the grounding electrode plate
Group, the discharge electrode group are electric by the electric discharge of central electrode stick and several parallel arrangements being fixed on the central electrode stick
Pole composition, the discharge electrode is uniformly distributed from top to bottom using central electrode stick as symmetry axis, the grounding electrode plate and
Gas passage between discharge electrode constitutes the exoelectrical reaction area；
The absorption liquid circulating device includes that the inlet tube that one end is connect with the exoelectrical reaction area and the inlet tube connect
Circulating pump, absorbing liquid circulating slot and deflector composition, the described inlet tube one end connect is connect with absorbing liquid entrance, and the other end passes through
Circulating pump is connected to the absorbing liquid circulating slot, and the absorbing liquid entrance is located at the grounding electrode plate side far from absorption
That one end of liquid outlet, the deflector are located in the exoelectrical reaction area at absorbing liquid entrance fluid outlet, and described leads
The liquid stream that the position of flowing plate enters the absorbing liquid entrance is by the guidance of the deflector along the grounding electrode plate
It flows from above to below；
The central electrode stick and motor axis connection, the central electrode stick are electrically connected with high voltage power supply；The electric discharge is anti-
Answering device integrally is in airtight close.
2. application as described in claim 1, it is characterised in that: the application are as follows: apply to the discharge electrode (11)
High voltage, drives discharge electrode (11) rotation under the action of motor (3), and starting absorbs liquid circulating device, the absorbing liquid
Enter inlet tube (4) from absorbing liquid circulating slot (9) by circulating pump (13) circulation, then from absorbing liquid entrance along grounding electrode
Plate (12) flows into the inner cavity of the discharge reactor, and the grounding electrode plate (12) surface forms uniform absorbing liquid liquid
Film is passed through gas to be processed from the gas access (1) of described discharge reactor one end, and the gas to be processed passes through institute
It is oxidized or degrades when the exoelectrical reaction area stated, the water-soluble intermediate product of degradation process or water-soluble final product are connect by described
The absorbing liquid liquid film formed on ground electrode absorbs, to achieve the purpose that degradation；The absorbing liquid is the water-soluble of alkaline matter
The mixture of the aqueous solution and reducing agent of liquid or alkaline matter, the alkaline matter are sodium hydroxide, sodium hydroxide potassium, hydrogen-oxygen
Change calcium, sodium carbonate, potassium carbonate or calcium carbonate；The reducing agent is sodium sulfite or urea.
3. application as claimed in claim 2, it is characterised in that: the gas to be processed be combustion of fossil fuel flue gas,
The exhaust gas of each production technology discharge such as metallurgy, building materials or chemical pharmaceutical.
4. application as claimed in claim 2, it is characterised in that: the discharge reactor includes hollow shell, the shell
Intracorporal exoelectrical reaction area and the absorption liquid circulating device being connect by the shell with the exoelectrical reaction area, the shell are
Hollow rectangular parallelepiped structure, the shell are equipped with gas access (1), gas vent (7)；The enclosure interior constitutes gas
Circulation road, the airflow channel two sides inner wall are symmetrically arranged with grounding electrode plate (12) along airflow direction, and the air-flow is logical
Road bottom is in back taper, and the airflow channel bottom is exported equipped with absorbing liquid, and the absorbing liquid outlet is recycled with absorbing liquid
Slot (9) connection；One or more groups of electric discharge electricity parallel with the airflow direction are provided between the grounding electrode plate (12)
Pole (11) group, the discharge electrode (11) group is by central electrode stick (5) and is fixed on several on the central electrode stick (5)
The discharge electrode (11) of parallel arrangement forms, the discharge electrode (11) with central electrode stick (5) be symmetry axis from top to bottom
It is uniformly distributed, the gas passage between the grounding electrode plate (12) and discharge electrode (11) constitutes the exoelectrical reaction
Area；
The absorption liquid circulating device includes the inlet tube (4) and the feed liquor that one end is connect with the exoelectrical reaction area
Manage circulating pump (13), absorbing liquid circulating slot (9) and deflector (6) composition of (4) connection, described inlet tube (4) one end and absorption
The connection of liquid entrance, the other end are connected to by circulating pump (13) with the absorbing liquid circulating slot (9), and the absorbing liquid entrance is located at
That one end that grounding electrode plate (12) side is exported far from absorbing liquid, it is anti-that the deflector (6) is located at the electric discharge
It answers in area at absorbing liquid entrance fluid outlet, the liquid stream that the position of the deflector (6) enters the absorbing liquid entrance is logical
The guidance for crossing the deflector (6) is flowed from above to below along the grounding electrode plate (12)；
The central electrode stick (5) and motor (3) axis connection, the central electrode stick (5) are electrically connected with high voltage power supply；It is described
Discharge reactor be integrally in airtight close.
5. application as claimed in claim 2, it is characterised in that: the discharge reactor includes hollow shell, the shell
Intracorporal exoelectrical reaction area and the absorption liquid circulating device being connect by the shell with the exoelectrical reaction area, the electric discharge
It is hollow tube structure in the shell of reactor, the regular polygon that the cross section of the tube structure is centrosymmetric is described
Cylinder inboard wall be grounding electrode plate (12)；The housing bottom is respectively equipped with gas access (1) and absorbing liquid outlet, described
Upper part of the housing be respectively equipped with gas vent (7) and absorbing liquid entrance；The absorbing liquid entrance is distributed in the shell
On each side, the inner barrel constitutes airflow channel, is equipped with one or more groups of and air-flow in the airflow channel
The vertical discharge electrode group in direction, the discharge electrode group is by central electrode stick (5) and is fixed on the central electrode stick (5)
Several parallel arrangements discharge electrode (11) composition, the discharge electrode (11) with central electrode stick (5) be symmetry axis from
It is uniformly distributed under above, the gas passage between the grounding electrode plate (12) and discharge electrode (11) constitutes exoelectrical reaction
Area；
The absorption liquid circulating device includes the inlet tube (4) and the feed liquor that one end is connect with the exoelectrical reaction area
Manage circulating pump (13), absorbing liquid circulating slot (9) and deflector (6) composition of (4) connection, described inlet tube (4) one end and absorption
The connection of liquid entrance, the other end are connected to by circulating pump (13) with the absorbing liquid circulating slot (9), and the absorbing liquid entrance is located at
That one end that grounding electrode plate (12) side is exported far from absorbing liquid, it is anti-that the deflector (6) is located at the electric discharge
It answers in area at absorbing liquid entrance fluid outlet, the liquid stream that the position of the deflector (6) enters the absorbing liquid entrance is logical
The guidance for crossing the deflector (6) is flowed from above to below along the grounding electrode plate (12)；
The central electrode stick (5) and motor (3) axis connection, the central electrode stick (5) are electrically connected with high voltage power supply；It is described
Discharge reactor be integrally in airtight close.
6. application as claimed in claim 2, it is characterised in that: the deflector (6) is rectangular slab, the deflector
(6) angle is formed with grounding electrode plate (12) top half, and the angle is acute angle, the deflector (6)
There are make the absorbing liquid by deflector (6) along the grounding electrode plate between the grounding electrode plate (12)
(12) gap flowed, the rectangular slab match with the shell dimension.
7. application as claimed in claim 2, it is characterised in that: the material of the discharge electrode (11) and grounding electrode plate (12)
Including stainless steel, titanium, zirconium, tantalum, tungsten, lead or alloy and associate conductive material.
8. application as claimed in claim 2, it is characterised in that: the power supply mode of the discharge electrode (11) is direct current, arteries and veins
Punching or exchange；The voltage of the direct current supply is ± 10kV~± 150kV；The voltage of the pulse power supply be ± 10kV~±
150kV, the pulse recurrence frequency of pulse power supply are 10Hz~500Hz；The voltage of the Alternating Current Power Supply is 1kV~300kV, frequency
For 10Hz~1000Hz.
9. application as claimed in claim 2, it is characterised in that: the gas to be processed is in the stop in the exoelectrical reaction area
Between be 3s~120s.
10. application as claimed in claim 2, it is characterised in that: the absorbing liquid liquid film with a thickness of 1-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811172302.1A CN109316915A (en) | 2018-10-09 | 2018-10-09 | A kind of application of discharge reactor in removal nitrogen oxides of exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811172302.1A CN109316915A (en) | 2018-10-09 | 2018-10-09 | A kind of application of discharge reactor in removal nitrogen oxides of exhaust gas |
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| CN201811172302.1A Pending CN109316915A (en) | 2018-10-09 | 2018-10-09 | A kind of application of discharge reactor in removal nitrogen oxides of exhaust gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113604828A (en) * | 2021-06-30 | 2021-11-05 | 东华理工大学 | Electrode reaction tube for electrochemical reaction and preparation process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2161004Y (en) * | 1993-05-28 | 1994-04-06 | 肖茂如 | Electrode displacement type pulse corona generator |
| CN103990359A (en) * | 2014-06-06 | 2014-08-20 | 北京航空航天大学 | Method and device for purifying nitric oxide and fog particles in wet desulphurization aerial fog by low-temperature plasma |
-
2018
- 2018-10-09 CN CN201811172302.1A patent/CN109316915A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2161004Y (en) * | 1993-05-28 | 1994-04-06 | 肖茂如 | Electrode displacement type pulse corona generator |
| CN103990359A (en) * | 2014-06-06 | 2014-08-20 | 北京航空航天大学 | Method and device for purifying nitric oxide and fog particles in wet desulphurization aerial fog by low-temperature plasma |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113604828A (en) * | 2021-06-30 | 2021-11-05 | 东华理工大学 | Electrode reaction tube for electrochemical reaction and preparation process |
| CN113604828B (en) * | 2021-06-30 | 2023-10-27 | 东华理工大学 | Electrode reaction tube for electrochemical reaction and preparation process |
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Application publication date: 20190212 |