CN114570201A - Electron beam flue gas low temperature deNOx systems - Google Patents
Electron beam flue gas low temperature deNOx systems Download PDFInfo
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- CN114570201A CN114570201A CN202210352491.0A CN202210352491A CN114570201A CN 114570201 A CN114570201 A CN 114570201A CN 202210352491 A CN202210352491 A CN 202210352491A CN 114570201 A CN114570201 A CN 114570201A
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- 238000010894 electron beam technology Methods 0.000 title claims abstract description 48
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000003546 flue gas Substances 0.000 title claims abstract description 40
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- 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
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
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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
- B01D53/007—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 irradiation
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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
- B01D53/323—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 by electrostatic effects or by high-voltage electric fields
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- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/812—Electrons
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The invention belongs to the field of environmental protection. The electron beam flue gas low-temperature denitration system is characterized by comprising an SNCR denitration device, a first pipeline, a bag-type dust remover, a second pipeline, a fan, a wet desulphurization device, a third pipeline, an electron beam generation device and a fourth pipeline; the input end of the SNCR denitration device is connected with the flue gas output end of the boiler, the output end of the SNCR denitration device is connected with the input end of the bag-type dust remover through a first pipeline, the output end of the bag-type dust remover is connected with the input end of the wet desulphurization device through a second pipeline, a fan is arranged on the second pipeline, the output end of the wet desulphurization device is connected with the inlet of the electron beam generating device through a third pipeline, and the outlet of the electron beam generating device is connected with the inlet of the chimney through a fourth pipeline. The system has the characteristics of good denitration, desulfurization and dust removal effects, and can meet the environmental protection requirement in a low-temperature state.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a low-temperature flue gas denitration system.
Background
Flue gas generated by coal-fired boilers of power plants, sintering machines of steel plants and other furnaces burning fossil fuels contains a large amount of sulfur dioxide and nitrogen oxides, and if the flue gas is directly discharged into the atmosphere, the air can be polluted, so that environmental disasters such as acid rain and the like are formed.
The existing methods and devices for desulfurization, denitration and dust removal of flue gas are more, such as Chinese patents: CN202010128903.3 (named as integrated equipment for desulfurization, denitrification, whitening and dedusting of flue gas), CN201811651760.3 (a system and a method for low-temperature denitration and synchronous desulfurization treatment of flue gas), and CN201911383676.2 (a device and a method for desulfurization, denitrification and dedusting) and the like. There is a disadvantage in that the treatment effect is to be further improved.
The traditional electric precipitation utilizes the principle of electrostatic field adsorption, makes dusty gas bring electric charge to the laying dust utmost point skew, washes the entrapment dust through shaking reaching or water film, and this traditional technology can only the entrapment is easily by the dust of electric charge, and the dust that is difficult to be charged will escape, and the dust collection efficiency of this technology has not satisfied the environmental control of proposing the mark day by day. Because the frequent vibration reaches the deashing, makes the polar plate warp easily, leads to the discharge distance inhomogeneous, will appear frequent striking sparks and draw the arc, causes the polar plate to puncture, even breaks out a fire, and the insecurity of this technique also can lead to manufacturing enterprise's safety risk. Because the water film washes the dust collecting electrode, the pole plate is easy to scale, which causes a great increase of the operating cost and a reduction of the dust removing efficiency, the working current of the electric field is also easy to increase, and the normal production is also influenced by frequent washing. In sum, the traditional technology is deeply popular among users in aspects of dust removal efficiency, safety accidents, environmental protection accidents, energy conservation, consumption reduction and the like. Therefore, a new technology for replacing the traditional electric dust removal technology is urgently needed.
Disclosure of Invention
The invention aims to provide an electron beam flue gas low-temperature denitration system which has the characteristics of good denitration and dust removal effects.
In order to achieve the purpose, the invention adopts the technical scheme that: the electron beam flue gas low-temperature denitration system is characterized by comprising an SNCR denitration device 27, a first pipeline 28, a bag-type dust remover 29, a second pipeline 30, a fan 31, a wet desulphurization device 32, a third pipeline 33, an electron beam generation device 34 and a fourth pipeline 35; the input end of the SNCR denitration device 27 is connected with the flue gas output end of the boiler 26, the output end of the SNCR denitration device 26 is connected with the input end of a bag-type dust remover 29 through a first pipeline 28, the output end of the bag-type dust remover 29 is connected with the input end of a wet desulphurization device 32 through a second pipeline 30, a fan 31 is arranged on the second pipeline 30, the output end of the wet desulphurization device 32 is connected with the inlet of an electron beam generating device 34 through a third pipeline 33, and the outlet of the electron beam generating device 34 is connected with the inlet of a chimney through a fourth pipeline 35.
According to the technical scheme, the electron beam generating device comprises a power supply 1, an insulator 4, an anode 5, an anode support 6, an outlet cavity 7, a cathode 9, a collecting device 11, an inlet cavity 13 and a shell 20; an outlet cavity 15 is arranged in the outlet cavity 7, an outlet 8 is arranged on the right side face of the outlet cavity 7, a fourth through hole 22 is arranged on the upper end face of the outlet cavity 7, a third through hole 21 is arranged on the lower end face of the outlet cavity 7, the outlet 8, the fourth through hole 22 and the third through hole 21 are all communicated with the outlet cavity 15 of the outlet cavity 7, and the fourth through hole 22 is positioned right above the third through hole 21;
the right side surface of the inlet cavity 13 is provided with an inlet 10, the upper end surface of the inlet cavity 13 is provided with a second through hole 19, the inlet 10 and the second through hole 19 are both communicated with the inlet cavity of the inlet cavity 13, and the lower end of the inlet cavity 13 is an open end; the lower end of the inlet cavity 13 is fixedly connected with the collecting device 11;
the cathode 9 is positioned in the shell 20, the lower end of the cathode 9 is fixedly connected with the upper end of the inlet cavity 13 through a fixing device 14, a first through hole 17 is formed in the fixing device 14, and the first through hole 17 is communicated with a second through hole 19 in the inlet cavity 13; the upper end of the cathode 9 is fixedly connected with the lower end of the outlet cavity 7; the lower end part of the shell 20 is fixedly connected with the fixing device 14, and the upper end part of the shell 20 is fixedly connected with the lower end of the outlet cavity 7;
the upper end part of the anode 5 is connected with the anode bracket 6, and the middle lower part of the anode 5 passes through the fourth through hole 22 and the third through hole 21 and then is positioned near the cathode 9; the anode 5 is connected with the outlet cavity 7 through the insulator 4, and the insulator 4 is inserted into the fourth through hole 22; the upper end of the anode 5 is connected with the positive pole of the power supply 1 by a power line 2, and the cathode 9 is connected with the negative pole of the power supply 1 by a power line.
According to the technical scheme, the number of the cathodes 9 is 1-100, and the number of the anodes is the number corresponding to the number of the cathodes.
According to the technical scheme, the distance between the anode 5 and the cathode 9 is 2-60 cm.
According to the technical scheme, the anode is made of a conductive material; the cathode is made of metal or alloy.
According to the technical scheme, the cathode is plate-shaped, tubular or honeycomb-shaped.
According to the technical scheme, the cathode 9 is tubular, the upper end of the pipe hole 16 of the cathode 9 is communicated with the third through hole 21, the lower end of the pipe hole 16 of the cathode 9 is communicated with the first through hole 17, and the middle lower part of the anode 5 penetrates into the pipe hole 16 of the cathode 9.
According to the technical scheme, the power supply is a high-frequency high-voltage power supply, a high-voltage variable-frequency power supply or a super-audio frequency high-voltage power supply, the voltage of the power supply is 0.4 kilovolt to 200 kilovolts, and the frequency is 3000Hz-30 MHz.
According to the technical scheme, the power line 2 is provided with the current stabilizer 3 which is a programmable current stabilizer.
According to the technical scheme, the insulator is made of glass, porcelain bottles, nylon columns, silica gel or tetrafluoroethylene insulating columns and the like.
According to the above technical solution, the housing 20 is grounded by a grounding wire.
According to the technical scheme, the upper end of the cathode 9 is fixedly connected with the lower end of the outlet cavity 7 through a fixing device.
The invention has the beneficial effects that: the system has the characteristics of good denitration, desulfurization and dust removal effects, and can meet the environmental protection requirement in a low-temperature state.
Drawings
FIG. 1 is a schematic structural view (external view) of an electron beam generating apparatus according to the present invention.
Fig. 2 is a cross-sectional view of an electron beam generating apparatus according to the present invention.
Fig. 3 is a schematic structural view of an anode in embodiment 1 of the present invention.
Fig. 4 is a top view of fig. 3.
Fig. 5 is a schematic structural view of an anode in embodiment 2 of the present invention.
Fig. 6 is a top view of fig. 5.
FIG. 7 is a schematic structural diagram of the electron beam flue gas low-temperature denitration system of the invention.
In the figure: 1-power supply, 2-power line, 3-current stabilizer, 4-insulator, 5-anode, 6-anode support, 7-outlet cavity, 8-outlet, 9-cathode, 10-inlet, 11-collecting device, 12-collected material outlet, 13-inlet cavity, 14-fixing device, 15-outlet cavity, 16-pipe hole, 17-first through hole, 18-collecting cavity, 19-second through hole, 20-shell, 21-third through hole, 22-fourth through hole, 23-electrode spine, 24-anode rod, upper end of 25-anode, 26-boiler, 27-SNCR denitration device, 28-first pipeline, 29-bag dust remover, 30-second pipeline, 31-fan, 32-wet desulphurization device, 33-third pipeline, 34-electron beam generation device, 35-fourth pipeline.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 7, the electron beam flue gas low-temperature denitration system includes an SNCR denitration device 27, a first pipeline 28, a bag-type dust collector 29, a second pipeline 30, a fan 31, a wet desulfurization device 32, a third pipeline 33, an electron beam generating device 34, and a fourth pipeline 35; the input end of an SNCR (or called SNCR) denitration device 27 is connected with the flue gas output end of a boiler 26, the output end of the SNCR denitration device 26 is connected with the input end of a bag-type dust remover 29 through a first pipeline 28, the output end of the bag-type dust remover 29 is connected with the input end of a wet desulphurization device 32 through a second pipeline 30, a fan 31 is arranged on the second pipeline 30, the output end of the wet desulphurization device 32 is connected with the inlet of an electron beam generating device 34 through a third pipeline 33, and the outlet of the electron beam generating device 34 is connected with the inlet of a chimney through a fourth pipeline 35.
The use of the electron beam flue gas low-temperature denitration system: flue gas output by the boiler enters an SNCR denitration device for denitration treatment; the flue gas after denitration treatment is sent into a bag-type dust remover 29 for dust removal through a first pipeline 28, and the flue gas after dust removal is sent into a wet desulphurization device 32 for desulphurization treatment through a second pipeline 30 and a fan 31; the flue gas after desulfurization treatment is sent to an electron beam generating device 34 through a third pipeline 33 for treatment (further desulfurization, denitration, dust removal, whitening and aerosol PM2.5 removal), and the treated gas is sent to a chimney through a fourth pipeline 35 for emission.
As shown in fig. 1, 2, 3 and 4, the electron beam generating device (or flue gas treatment device) includes a power supply 1, an insulator 4, an anode 5, an anode support 6, an outlet chamber 7, a cathode 9, a collecting device 11, an inlet chamber 13 and a housing 20; an outlet cavity 15 is arranged in the outlet cavity 7, an outlet 8 is arranged on the right side surface of the outlet cavity 7 (for convenience of description, the left side is left, and the right side is right in fig. 2), a fourth through hole 22 is arranged on the upper end surface of the outlet cavity 7, a third through hole 21 is arranged on the lower end surface of the outlet cavity 7, the outlet 8, the fourth through hole 22 and the third through hole 21 are all communicated with the outlet cavity 15 of the outlet cavity 7, and the fourth through hole 22 is positioned right above the third through hole 21 (when the number of anodes 5 is multiple, the fourth through hole 22 and the third through hole 21 are correspondingly multiple in groups);
the right side surface of the inlet cavity 13 is provided with an inlet 10 (an inlet cavity is arranged in the inlet cavity 13), the upper end surface of the inlet cavity 13 is provided with a second through hole 19, the inlet 10 and the second through hole 19 are both communicated with the inlet cavity of the inlet cavity 13, and the lower end of the inlet cavity 13 is an opening end; the lower end of the inlet cavity 13 is fixedly connected with a collecting device (such as a collecting hopper) 11 (the lower port of the inlet cavity 13 is communicated with a collecting cavity 18 of the collecting device 11, the lower end part of the collecting device 11 is provided with a collected material outlet 12, and a control valve is arranged at the collected material outlet 12);
the cathodes 9 are positioned in the shell 20 (all the cathodes 9 are positioned in the shell 20), the lower ends of the cathodes 9 are fixedly connected (for example, welded or bolted) with the upper end of the inlet cavity 13 by the fixing device 14, the fixing device 14 is provided with first through holes 17, and the first through holes 17 are communicated with second through holes 19 on the inlet cavity 13; the upper end of the cathode 9 is fixedly connected (such as welded or bolted) with the lower end of the outlet cavity 7; the lower end of the outer shell 20 is fixedly connected with the fixing device 14 (such as welded or bolted connection; the outer shell 20 of the embodiment is in a square tube shape), and the upper end of the outer shell 20 is fixedly connected with the lower end of the outlet cavity 7 (such as welded or bolted connection; all the first through holes 17 and the third through holes 21 are positioned in the outer shell 20 to form a passage between the inlet and the outlet);
the upper end 25 of the anode 5 is connected with the anode support 6 (the anode support 6 can be fixed on the outlet cavity 7 or independently arranged on the foundation), the middle lower part of the anode 5 passes through the fourth through hole 22 and the third through hole 21 and then is positioned near the cathode 9 (the distance between the anode 5 and the cathode 9 is 2-60cm nearby; the middle lower part of the anode 5 is positioned in the shell 20; the lower end part of the anode 5 can be fixedly connected with the fixing device 14 by an insulator); the anode 5 is connected with the outlet cavity 7 through the insulator 4, and the insulator 4 is inserted into the fourth through hole 22; the upper end of the anode 5 is connected with the positive pole of the power supply 1 through the power line 2 (the power line 2 is provided with the current regulator 3), and the cathode 9 is connected with the negative pole of the power supply 1 through the power line (the power line is not shown in the connection in fig. 2).
The number of the cathodes 9 is 1-100, the number of the anodes is the number corresponding to the number of the cathodes { 16 cathodes are adopted in the embodiment, and the cross section of the shell 20 is square (the shell 20 is a square cylinder); the fourth through hole 22, the third through hole 21, and the insulator 4 are all the corresponding numbers }.
The distance between the anode 5 and the cathode 9 is 2-60cm (the distance between the electrode sharp point of the anode 5 closest to the cathode 9 and the cathode 9).
The anode is made of a conductive material (such as metal, alloy or graphene). The cathode is made of metal (metal plate) or alloy.
The cathode is in the shape of a plate, a tube (circular tube, square tube), a honeycomb or the like (in this embodiment 1, a tubular cathode is used).
In this embodiment, the cathode 9 is tubular, the upper end of the pipe hole 16 of the cathode 9 is communicated with the third through hole 21, the lower end of the pipe hole 16 of the cathode 9 is communicated with the first through hole 17, and the middle lower part of the anode 5 penetrates into the pipe hole 16 of the cathode 9.
The fixing device 14 is plate-shaped (the plate-shaped fixing device is provided with 2-20 threaded connection holes for connection).
The power supply is a high-frequency high-voltage power supply, a high-voltage variable-frequency power supply or a super-audio high-voltage power supply (the power supply controls one anode 5 and one cathode 9, and can also control a plurality of anodes 5 and cathodes 9), the voltage of the power supply is 0.4 kilovolt to 200 kilovolt, and the frequency is 3000Hz-30MHz (megahertz).
And a current stabilizer 3 is arranged on the power line 2. Further, the current regulator is a programmable current regulator.
The insulator (or the insulating device) is made of glass, porcelain bottles, nylon columns, silica gel, tetrafluoroethylene insulating columns and the like. The insulator makes it possible to withstand the large potential difference that exists between the two electrodes.
The housing 20 is grounded by a ground line.
The upper end of the cathode 9 can also be fixedly connected with the lower end of the outlet cavity 7 by a fixing device.
The anode 5 is composed of an anode rod 24 and electrode spikes (discharge needles) 23, the upper end of the anode rod 24 is a connecting part for connection (for example, the upper end of the anode rod 24 is provided with an external thread), the middle lower part of the anode rod 24 is provided with a plurality of electrode spikes 23 (the number of the electrode spikes is 10-1000; the electrode spikes 23 can be integrated with the anode rod 24 or welded with the anode rod 24; the anode rod 24 is tubular, the diameter of the tube is 28mm), the electrode spikes 23 are spirally arranged on the anode rod 24 in a spiral lifting manner, the distance between adjacent electrode spikes 23 is 10-50mm, and the spiral distance a is 10-40mm (the height a of the up-down distance is shown in figure 3).
The electrode spikes (discharge needles) 23 are conical, the taper is 5-45 degrees, and the height of the electrode spikes is 10-30 mm.
Example 2
As shown in fig. 1, 2, 5 and 6, the anode is substantially the same as in example 1 except for the anode. The anode 5 consists of an anode rod body 24 and electrode spike groups, the upper end part of the anode rod body 24 is a connecting part for connection (for example, the upper end part of the anode rod body 24 is provided with an external thread), the middle lower part of the anode rod body 24 is provided with a plurality of electrode spike groups (the plurality of electrode spike groups are 3-30 electrode spike groups), the plurality of electrode spike groups are vertically arranged on the anode rod body 24 at intervals (arranged in parallel), and the distance c between every two adjacent electrode spike groups is 10-40 mm; each electrode spike group consists of a plurality of electrode spikes 23 (the number of the electrode spikes is 10-200; the electrode spikes 23 can be integrated with the anode rod body 24, the anode rod body 24 is tubular, the diameter of the tube is 28mm), and the distance b between every two adjacent electrode spikes 23 in each electrode spike group is 10-50mm (as shown in figure 5).
The anode is made of graphene, and the anode is also called a graphene electron beam electrode rod.
Use of the electron beam generating device: an inlet 10 of the electron beam generating device is connected with flue gas to be treated, an outlet 8 of the electron beam generating device is connected with a discharge pipeline, a power supply 1 is switched on, the flue gas passes between an anode 5 and a cathode 9, high-frequency photons excite a cathode (a metal polar plate) to generate a large amount of particles and electron flow, the large amount of electron flow reacts with dust-containing gas to knock off dust or destroy molecular chains of the dust-containing gas, the gas is decomposed and cracked quickly, water vapor is ionized into hydrogen ions and oxygen anions to form hydroxyl free radicals and participate in the reaction of the gas, the dust falls into a collecting device 11, and the purified gas is discharged from the outlet 8.
An electron beam denitration process:
1. discharging in the electron beam generating device to form high-energy electron beams;
2. electron beam contact with flue gas and water, O2、H2O and other molecules obtain energy to generate active factors (O.atom, OH.free radical, H) with strong oxidizing property2O.radical);
3. NO in the smoke is oxidized by free radicals to generate NO firstly2Continues to be oxidized to generate N2O5；
4、N2O5Reacting with water molecule to generate HNO3；
5. Supplementing a proper amount of ammonia gas in the flue gas, and absorbing the generated NH4NO3；
6. The generated ammonium salt is captured by the electrode and collected.
Electron beam denitration principle
HNO3+NH3→NH4NO3 (3)
At present, the SNCR denitration efficiency cannot meet the environmental protection requirement, the SCR denitration has the defects of strict requirement on the temperature of flue gas, large investment and the like, and the electron beam denitration technology is combined with the SNCR denitration technology, so that the environmental protection requirement can be met in a low-temperature state.
The effect is as follows: the smoke is discharged into particulate matter discharge concentration of less than 5mg/Nm after passing through an electron beam generating device (or called a smoke treatment device)3，SO2Discharge concentration < 15mg/Nm3NOx emission concentration < 30mg/Nm3And no 'wet smoke plume' phenomenon exists. The invention has the characteristics of whitening, removing PM2.5 of aerosol, and good effects of desulfurization, denitration and dust removal.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
The above description is intended to illustrate the preferred embodiments of the present invention, but the present invention is only a preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The electron beam flue gas low-temperature denitration system is characterized by comprising an SNCR denitration device (27), a first pipeline (28), a bag-type dust remover (29), a second pipeline (30), a fan (31), a wet desulphurization device (32), a third pipeline (33), an electron beam generating device (34) and a fourth pipeline (35); the input end of SNCR denitrification facility (27) links to each other with the flue gas output of boiler (26), the output of SNCR denitrification facility (26) is linked to each other by the input of first pipeline (28) with sack cleaner (29), the output of sack cleaner (29) is linked to each other by the input of second pipeline (30) with wet flue gas desulfurization device (32), be equipped with fan (31) on second pipeline (30), the output of wet flue gas desulfurization device (32) is linked to each other by the import of third pipeline (33) with electron beam generating device (34), the export of electron beam generating device (34) is linked to each other by the entry of fourth pipeline (35) with the chimney.
2. The electron beam flue gas low-temperature denitration system of claim 1, characterized in that: the electron beam generating device comprises a power supply (1), an insulator (4), an anode (5), an anode support (6), an outlet cavity (7), a cathode (9), a collecting device (11), an inlet cavity (13) and a shell (20); an outlet cavity (15) is formed in the outlet cavity (7), an outlet (8) is formed in the right side face of the outlet cavity (7), a fourth through hole (22) is formed in the upper end face of the outlet cavity (7), a third through hole (21) is formed in the lower end face of the outlet cavity (7), the outlet (8), the fourth through hole (22) and the third through hole (21) are communicated with the outlet cavity (15) of the outlet cavity (7), and the fourth through hole (22) is located right above the third through hole (21);
an inlet (10) is formed in the right side face of the inlet cavity (13), a second through hole (19) is formed in the upper end face of the inlet cavity (13), the inlet (10) and the second through hole (19) are communicated with the inlet cavity of the inlet cavity (13), and the lower end of the inlet cavity (13) is an open end; the lower end of the inlet cavity (13) is fixedly connected with the collecting device (11);
the cathode (9) is positioned in the shell (20), the lower end of the cathode (9) is fixedly connected with the upper end of the inlet cavity (13) through a fixing device (14), a first through hole (17) is formed in the fixing device (14), and the first through hole (17) is communicated with a second through hole (19) in the inlet cavity (13); the upper end of the cathode (9) is fixedly connected with the lower end of the outlet cavity (7); the lower end part of the shell (20) is fixedly connected with the fixing device (14), and the upper end part of the shell (20) is fixedly connected with the lower end of the outlet cavity (7);
the upper end part of the anode (5) is connected with the anode support (6), and the middle lower part of the anode (5) passes through the fourth through hole (22) and the third through hole (21) and then is positioned near the cathode (9); the anode (5) is connected with the outlet cavity (7) through the insulator (4), and the insulator (4) is inserted into the fourth through hole (22); the upper end of the anode (5) is connected with the anode of the power supply (1) through a power line (2), and the cathode (9) is connected with the cathode of the power supply (1) through a power line.
3. The electron beam flue gas low-temperature denitration system of claim 2, characterized in that: the number of the cathodes (9) is 1-100, and the number of the anodes is the number corresponding to the number of the cathodes.
4. The electron beam flue gas low-temperature denitration system of claim 2, characterized in that: the distance between the anode (5) and the cathode (9) is 2-60 cm.
5. The electron beam flue gas low-temperature denitration system of claim 2, characterized in that: the anode is made of a conductive material; the cathode is made of metal or alloy.
6. The electron beam flue gas low-temperature denitration system of claim 2, characterized in that: the cathode is plate-shaped, tubular or honeycomb-shaped.
7. The electron beam flue gas low-temperature denitration system of claim 2, characterized in that: the cathode (9) is tubular, the upper end of the pipe hole (16) of the cathode (9) is communicated with the third through hole (21), the lower end of the pipe hole (16) of the cathode (9) is communicated with the first through hole (17), and the middle lower part of the anode (5) penetrates into the pipe hole (16) of the cathode (9).
8. The electron beam flue gas low-temperature denitration system of claim 2, characterized in that: the power supply is a high-frequency high-voltage power supply, a high-voltage variable-frequency power supply or a super-audio frequency high-voltage power supply, the voltage of the power supply is 0.4 kilovolt to 200 kilovolt, and the frequency is 3000Hz-30 MHz.
9. The electron beam flue gas low-temperature denitration system of claim 2, characterized in that: and a current stabilizer (3) is installed on the power line (2), and the current stabilizer is a programmable current stabilizer.
10. The electron beam flue gas low-temperature denitration system of claim 2, characterized in that: the insulator is made of glass, porcelain bottles, nylon columns, silica gel or tetrafluoroethylene insulating columns.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561776A (en) * | 2016-02-03 | 2016-05-11 | 江门市同力环保科技有限公司 | Industrial coal-fired boiler flue gas multi-pollutant ultra-low emission and removal cooperated system |
| CN206980987U (en) * | 2017-10-25 | 2018-02-09 | 福建龙净环保股份有限公司 | A kind of flue gas processing device |
| CN207308099U (en) * | 2017-11-14 | 2018-05-04 | 山东聊城三阳环保产业有限公司 | High voltage pulse electric field low-temperature denitration and cleaner |
| CN108201783A (en) * | 2018-02-01 | 2018-06-26 | 广州广大气治理工程有限公司 | A kind of boiler smoke multiple pollutant deep treatment device, system and method |
| WO2020083204A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | Engine exhaust gas treatment system and method |
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- 2021-08-05 CN CN202110897325.4A patent/CN113499686A/en active Pending
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561776A (en) * | 2016-02-03 | 2016-05-11 | 江门市同力环保科技有限公司 | Industrial coal-fired boiler flue gas multi-pollutant ultra-low emission and removal cooperated system |
| CN206980987U (en) * | 2017-10-25 | 2018-02-09 | 福建龙净环保股份有限公司 | A kind of flue gas processing device |
| CN207308099U (en) * | 2017-11-14 | 2018-05-04 | 山东聊城三阳环保产业有限公司 | High voltage pulse electric field low-temperature denitration and cleaner |
| CN108201783A (en) * | 2018-02-01 | 2018-06-26 | 广州广大气治理工程有限公司 | A kind of boiler smoke multiple pollutant deep treatment device, system and method |
| WO2020083204A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | Engine exhaust gas treatment system and method |
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