CN202315702U - Smoke denitrating device - Google Patents
Smoke denitrating device Download PDFInfo
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- CN202315702U CN202315702U CN2011204653032U CN201120465303U CN202315702U CN 202315702 U CN202315702 U CN 202315702U CN 2011204653032 U CN2011204653032 U CN 2011204653032U CN 201120465303 U CN201120465303 U CN 201120465303U CN 202315702 U CN202315702 U CN 202315702U
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Abstract
The utility model belongs to the technical field of environmental protection, and particularly provides a smoke denitrating device for direct-current corona discharge concerted catalytic oxidation and denitration. The device comprises a main reactor, an absorbing device and a draught fan. The bottom of the main reactor is sequentially connected with the absorbing device and the draught fan, one side of the main reactor is respectively connected with a high voltage direct-current power supply and an electrode gas tank, a gas flow meter is arranged between the electrode gas tank and the main reactor, and a gas detecting device is connected between the main reactor and the absorbing device. The smoke denitrating device aims at solving the technical problem that low-temperature plasma discharging to remove NOX in smoke is high in energy consumption, utilizes synergistic effect of free radicals generated by direct-current corona discharge and a catalytic agent and is a denitrating device which removes nitric oxide in the smoke through direct-current corona discharge concerted catalytic oxidation in low-temperature pollution-free mode.
Description
Technical field
The utility model belongs to environmental technology field, and a kind of out of stock device of flue gas of dc corona discharge concerted catalysis oxidation and denitration especially is provided.
Background technology
Along with rapid economy development, human increasing to the demands for energy amount, the nitrogen oxide (NO that in atmosphere, discharges
X) more and more, therefore, how to control NO effectively
XDischarging become the focus of current atmosphere pollution area research.At present, domestic and international application gas denitrifying technology comparatively widely is selective catalytic reduction (SCR), and this technology receives increasing concern with its high NO removal efficiency.But this method adopts the vanadium Titanium series catalyst in the coal-burning power plant at present, and with NH
3As reducing agent; Therefore thereby possibly cause the escaping of ammonia to corrode follow-up equipment and reduce equipment life; Moreover such catalyst optimum temperature window is between 320 ℃～380 ℃; Denitration device need be placed on before the electrostatic precipitator, and a large amount of flying dusts cause honeycomb catalyst to stop up and inactivation with fine particulates, make catalyst the actual motion activity and be difficult to satisfy the technological requirement of large scale industry device service life.
From the eighties in 20th century, low temperature plasma is at NO
XThe application that removes the aspect has caused people's attention gradually.Plasma discharge can produce a large amount of electronics, ion, atom, free radical and excited state molecule isoreactivity material, can be under lower temperature activation NO
XWith other the stable little molecules in the flue gas, reduce the activation energy of reaction, carry out at a lower temperature thereby help chemical reaction.But plasma smoke gas treatment technology exists problems such as energy consumption height, causes this technology to be difficult to realize industrialization so far.
Application number is that the utility model of CN200920126052.8 discloses a kind of equipment for denitrifying flue gas; Comprise reaction tower, air-introduced machine and chimney; The graininess denitrating catalyst is housed in the said reaction tower, and reaction tower bottom is provided with the boiler smoke import, and top is provided with exhanst gas outlet after the denitration; Exhanst gas outlet is communicated with after air-introduced machine import and the denitration, and outlet is communicated with chimney; Reaction tower endoparticle shape denitrating catalyst bottom is provided with the ammonia import.This equipment for denitrifying flue gas and conventional denitrification apparatus are similar, but owing to be single catalyst denitration only, so energy consumption is big and efficient is not high.
The utility model content
The purpose of the utility model is to remove NO in the flue gas to present discharge of plasma in low temperature
XThe energy consumption technical problems of high is utilized the free radical of dc corona discharge generation and the synergy between the catalyst, and a kind of pollution-free NO of removing of low temperature that realizes is provided
XDc corona discharge concerted catalysis oxidation removal flue gas in the denitrification apparatus of nitrogen oxide.
The above-mentioned technical problem of the utility model is able to implement through following technical scheme:
A kind of equipment for denitrifying flue gas; This device comprises main reactor, absorption plant and air-introduced machine; The main reactor bottom is connected with air-introduced machine with absorption plant successively; Main reactor one side connects high-voltage DC power supply and electrode gas tank respectively, is provided with gas flowmeter between electrode gas tank and the main reactor, is connected with gas detection equipment between main reactor and the absorption plant.
Dc corona discharge concerted catalysis oxidation and denitration device mainly comprises: housing, plasma producing apparatus, honeycomb fashion catalyst, absorption plant.Wherein, the low temperature plasma generating means comprises: anode nozzle, porous cathode plate, high-voltage DC power supply, transformer.Discharge reactor uses 20kV～50kV high-voltage DC power supply, and injector electrode connects positive high voltage, and the porous cathode plate connects negative high voltage.The female pipe of injector electrode and electrode is processed by stainless steel tube, and the length of nozzle is 8～15mm, and external diameter is 3～5mm, injector spacing 20～100mm.The discharge catalytic district can multistagely arrange.Every grade of female pipe of many electrodes of line side by side makes nozzle constitute a face in the horizontal direction, enlarges the conversion zone area, and the spacing between the female pipe of nozzle is 50～100mm, and injector electrode quantity is according to actual flue gas treating capacity and device adjustable size.The discharge injector electrode is placed perpendicular to the porous cathode plate, and polar plate spacing adopts 50～200mm, and polar plate spacing is 1～2 times of injector spacing.Electrode gas uses compressed air, and the electrode throughput is 1/5～1/15 of a flue gas flow.
Honeycomb fashion ceramic catalyst layer is with TiO
2Being carrier, is active component with the oxide of Co with high oxidation activity, Mn, Fe etc., adopts immersion process for preparing, processes through technologies such as extrusion modling, drying, calcinings.The preparation method of honeycomb fashion ceramic catalyst layer is a prior art, and the important content of non-the utility model is not done detailed description at this.Honeycomb fashion ceramic catalyst layer is placed between two electrodes.
As preferably, the housing of main reactor is the corrosion resistant plate structure, and the female pipe of electrode is connected with electrode gas tank pipeline.Housing is processed by corrosion resistant plate.Carry out insulation protection between housing and the electrode, the distance between sparking electrode and the housing must be greater than the distance between injector electrode and the porous cathode plate.
Absorption plant is an absorbent with ammoniacal liquor aqueous slkali etc., at NO:NO
2Can realize during ≈ 1:1 NO
XEffective absorption.
As preferably; Described main reactor is a tube structure; Its upper and lower is respectively equipped with upper flue and lower flue, and barrel is provided with one deck discharge catalytic district at least, and the discharge catalytic district is made up of the female pipe of the cowling panel that distributes successively from top to bottom, electrode, ceramic honeycomb catalyst layer, the porous cathode plate that are fixed on the cylinder inboard wall; The female pipe of electrode below is provided with plurality of nozzles, and the female pipe of electrode is provided with insulating barrier with the housing contact site of main reactor.
As preferably, the two-layer discharge catalytic of described main reactor set inside district is provided with one deck cowling panel between the discharge catalytic district.
As preferably, be provided with current inductor between main reactor and the high-voltage DC power supply; The exit of electrode gas tank is provided with pressure-reducing valve.
The beneficial effect that the utility model compared with prior art has: the utility model has been given full play to the advantage of plasma discharge and catalysis, reduces the temperature window of denitration, solves the adverse effect problem of flue dust to catalyst.The high activity materials such as free radical that utilize discharge of plasma in low temperature to produce have improved catalyst reactivity at low temperatures, have reduced the energy consumption of discharge simultaneously.Dc corona discharge concerted catalysis oxidation reactor can be widely used in large scale industry device filed of flue gas purification, has advantages such as energy-conservation, pollution-free, simple structure.
Description of drawings
Fig. 1 is that the system of the utility model device connects sketch map;
Fig. 2 is the internal structure sketch map of the utility model main reactor among Fig. 1.
Among the figure, 1 main reactor, 2 high-voltage DC power supplies, 3 current inductors, 4 electrode gas tanks; 5 pressure-reducing valves, 6 gas flowmeters, 8 absorption plants, 9 air-introduced machines, 10 gas detection equipments; 11 upper flues, 12 housings, the female pipe of 13 electrodes, 14 nozzles, 15 porous cathode plates; 16 ceramic honeycomb catalyst layers, 17 cowling panels, 18 insulating barriers, 19 lower flues.
The specific embodiment
Further specify below in conjunction with the technology contents and the embodiment of accompanying drawing the utility model.
Employed technology in following examples unless stated otherwise, is routine techniques known to those skilled in the art; Employed instrument and equipment, reagent etc., only this specification specifies, what the research that is this area and technical staff can be through public approach acquisitions.
Embodiment
Comprise like Fig. 1, equipment for denitrifying flue gas shown in Figure 2: main reactor 1, absorption plant 8 and air-introduced machine 9; The main reactor bottom is connected with air-introduced machine with absorption plant successively; Main reactor one side connects high-voltage DC power supply 2 and electrode gas tank 4 respectively, is provided with gas flowmeter 6 between electrode gas tank 4 and the main reactor.The exit of electrode gas tank is provided with pressure-reducing valve 5.Be connected with gas detection equipment 10 between main reactor and the absorption plant, be provided with current inductor 3 between main reactor and the high-voltage DC power supply.
Main reactor is a tube structure; Its upper and lower is respectively equipped with upper flue 11 and lower flue 19; Barrel is provided with two-layer discharge catalytic district; Every layer of discharge catalytic district forms 15 by the cowling panel 17 that distributes successively, electrode mother pipe 13, ceramic honeycomb catalyst layer 16, the porous cathode plate that are fixed on the cylinder inboard wall from top to bottom, and the female pipe of electrode below is provided with plurality of nozzles 14, and electrode mother pipe 13 is provided with insulating barrier 18 with housing 12 contact sites of main reactor.Injector electrode is formed porous cathode plate 15 ground connection by the female pipe 13 of electrode with nozzle 14.Two-layer discharge catalytic is provided with one deck cowling panel 17 between the district.Cowling panel is provided with several equally distributed holes, and gas is evenly distributed in main reactor.Main reactor is the corrosion resistant plate structure, and the female pipe of electrode is connected with electrode gas tank pipeline.
Temperature is that 150～200 ℃ flue gas gets into reative cells from the upper flue at main reactor 1 top 11, makes air-flow evenly get into the discharge catalytic district through cowling panel 17.Air-flow is through the nozzle positive electrode afterwards; Get into discharge and catalysis acting in conjunction district; Simultaneously, electrode gas (air) comes out after pressure-reducing valve 5 is reduced to convenient pressure, to get into main reactor through gas flowmeter 6 from the electrode gas tank, in nozzle 14 electrodes of main reactor and the zone between the porous cathode plate 15; Be to generate the extremely strong discharge free radical of oxidisability under the condition of 20kV at high-voltage DC power supply 2 voltages, the NO in the flue gas is at free radical and Mn-Fe/TiO
2Changed into NO by partial oxygen under the synergy of honeycomb catalyst
2, oxygenation efficiency reaches 55%,
The female pipe of nozzle 14 electrodes and electrode 13 is processed by stainless steel tube, and the length of nozzle 14 is 10mm, and external diameter is 3mm, and injector spacing is 20mm.Discharge catalytic district one-level is arranged.(one-level is arranged: have only one deck catalyst) discharge injector electrode is placed perpendicular to the porous cathode plate, and nozzle and porous cathode distance between plates adopt 50mm.Electrode gas uses compressed air, and the electrode throughput is 1/7 of a flue gas flow, controls through gas flowmeter.Present embodiment is provided with the two arrays of electrodes gas tank, two gas flowmeters of parallel connection on the electrode gas output pipe, and each gas flowmeter is connected with the female pipe of electrode.Flue gas passes porous cathode plate 15, discharges via the lower flue that is positioned at the main reactor bottom 19, gets into the absorption plant 8 of built-in alkali lye, and in absorption plant, the alkali lye main component is aqueous slkalis such as ammoniacal liquor, NO and NO
2Total absorptivity can reach more than 85%.Flue gas after being purified is discharged through chimney under the effect of air-introduced machine 9.
The utility model adopts dc corona discharge, and electrode gas is air, and the oxidation that is directed against nitrogen oxide designs, and uses with the solid catalyst of titanium dioxide as carrier; Adopt dc corona discharge that NO is oxidized to NO
2, and wet absorption NO and NO
2The mist that ratio is certain remove nitrogen oxide, end product is nitrate and nitrite.
Specific embodiment described in the utility model only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Although the utility model has been made detailed explanation and has been quoted some instantiations as proof, to those skilled in the art, only otherwise leave the spirit of the utility model and scope can be done various variations or correction is obvious.
Claims (6)
1. equipment for denitrifying flue gas; It is characterized in that: this device comprises main reactor (1), absorption plant (8) and air-introduced machine (9); The main reactor bottom is connected with air-introduced machine with absorption plant successively; Main reactor one side connects high-voltage DC power supply (2) and electrode gas tank (4) respectively, is provided with gas flowmeter (6) between electrode gas tank and the main reactor, is connected with gas detection equipment (10) between main reactor and the absorption plant.
2. equipment for denitrifying flue gas according to claim 1; It is characterized in that: described main reactor is a tube structure; Its upper and lower is respectively equipped with upper flue (11) and lower flue (19); Barrel is provided with one deck discharge catalytic district at least; The discharge catalytic district forms (15) by the cowling panel (17) that distributes successively, the female pipe of electrode (13), ceramic honeycomb catalyst layer (16), the porous cathode plate that are fixed on the cylinder inboard wall from top to bottom, and the female pipe of electrode below is provided with plurality of nozzles (14), and the female pipe of electrode is provided with insulating barrier (18) with housing (12) contact site of main reactor.
3. equipment for denitrifying flue gas according to claim 1 and 2 is characterized in that: the two-layer discharge catalytic of described main reactor set inside district is provided with one deck cowling panel between the discharge catalytic district.
4. equipment for denitrifying flue gas according to claim 1 and 2 is characterized in that: be provided with current inductor (3) between main reactor and the high-voltage DC power supply; The exit of electrode gas tank is provided with pressure-reducing valve (5).
5. equipment for denitrifying flue gas according to claim 2 is characterized in that: the housing of main reactor is the corrosion resistant plate structure, and the female pipe of electrode is connected with electrode gas tank pipeline.
6. equipment for denitrifying flue gas according to claim 2 is characterized in that: the female pipe of injector electrode and electrode is processed by stainless steel tube, and the length of nozzle is 8～15mm, and external diameter is 3～5mm, injector spacing 20～100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204653032U CN202315702U (en) | 2011-11-22 | 2011-11-22 | Smoke denitrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204653032U CN202315702U (en) | 2011-11-22 | 2011-11-22 | Smoke denitrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202315702U true CN202315702U (en) | 2012-07-11 |
Family
ID=46427704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204653032U Withdrawn - After Issue CN202315702U (en) | 2011-11-22 | 2011-11-22 | Smoke denitrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202315702U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014134408A1 (en) * | 2013-03-01 | 2014-09-04 | Strategic Environmental & Energy Resources, Inc. | Waste disposal |
-
2011
- 2011-11-22 CN CN2011204653032U patent/CN202315702U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8870735B2 (en) | 2012-05-17 | 2014-10-28 | Strategic Environmental & Energy Resources, Inc. | Waste disposal |
| US9393519B2 (en) | 2012-05-17 | 2016-07-19 | Strategic Environmental & Energy Resources, Inc. | Waste disposal |
| WO2014134408A1 (en) * | 2013-03-01 | 2014-09-04 | Strategic Environmental & Energy Resources, Inc. | Waste disposal |
| GB2523062A (en) * | 2013-03-01 | 2015-08-12 | Strategic Environmental & Energy Resources Inc | Waste disposal |
| CN105392550A (en) * | 2013-03-01 | 2016-03-09 | 战略环境能源资源有限公司 | Waste disposal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20131218 |
|
| RGAV | Abandon patent right to avoid regrant |