CN220071215U - Sliding arc plasma tail gas treatment device - Google Patents
Sliding arc plasma tail gas treatment device Download PDFInfo
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- CN220071215U CN220071215U CN202320967092.5U CN202320967092U CN220071215U CN 220071215 U CN220071215 U CN 220071215U CN 202320967092 U CN202320967092 U CN 202320967092U CN 220071215 U CN220071215 U CN 220071215U
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- gas
- tail gas
- sliding arc
- blade electrode
- treatment device
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- 238000001514 detection method Methods 0.000 claims abstract description 53
- 239000000126 substance Substances 0.000 claims abstract description 11
- 238000000180 cavity ring-down spectroscopy Methods 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 16
- 230000003197 catalytic effect Effects 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 7
- 238000000862 absorption spectrum Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 109
- 238000005516 engineering process Methods 0.000 description 16
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 5
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 229910002089 NOx Inorganic materials 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001699 photocatalysis Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010504 bond cleavage reaction Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000011278 co-treatment Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The utility model relates to the technical field of tail gas treatment, in particular to a sliding arc plasma tail gas treatment device. The device comprises a detection mechanism for detecting gas to be detected on line and a treatment mechanism for treating harmful gas so as to catalyze the gas with the concentration of the detected harmful substance, wherein the treatment mechanism comprises a sliding arc reactor, a positive blade electrode and a negative blade electrode for plasma discharge are arranged in the sliding arc reactor, and a nozzle for introducing the detected gas is arranged between the positive blade electrode and the negative blade electrode. The utility model provides a sliding arc plasma tail gas treatment device which is simple in structure and high in energy efficiency, and can realize on-line detection of tail gas and simultaneously treat the tail gas by adopting sliding arc discharge plasma.
Description
Technical Field
The utility model relates to the technical field of tail gas treatment, in particular to a sliding arc plasma tail gas treatment device.
Background
Along with the continuous development of modern technology in China, industrial development and human activity emit CO, NOx and other harmful gases into the atmosphere, and the gases cause environmental pollution on one hand and harm to human bodies on the other hand; the existing device capable of treating the tail gas generally detects the types and the contents of harmful gases contained in the automobile tail gas in an infrared detection mode, and respectively treats the harmful gases discharged by exceeding standards, so that the device can treat the harmful gases in a targeted manner, and has the advantages of large occupied area, high cost and low treatment efficiency.
For example, in chinese patent publication No. CN105822391a, entitled "method and system for treating nitrogen dioxide in automobile exhaust", the method comprises the following steps: real-time monitoring is carried out on the automobile exhaust in an infrared detection mode, and corresponding electric signals are generated according to the wavelength range and the absorption degree of the absorbed infrared rays; analyzing and obtaining the types and the contents of harmful gases according to the generated electric signals; identifying each harmful gas according to the type of the harmful gas; judging whether the tail gas is the tail gas discharged in an overrun mode according to the content of each harmful gas; if so, judging whether harmful gas which is discharged in an overrun way in the tail gas contains nitrogen dioxide or not according to the identification; and if the harmful gas which is emitted in an overrun way in each tail gas contains nitrogen dioxide according to the identification judgment, generating a catalytic reaction instruction, and emitting the tail gas into a photocatalytic reactor for nitrogen dioxide treatment through the catalytic reaction instruction. The defects are that the infrared ray is used for generating the electric signal for detection, the anti-interference capability is weak, and the sensitivity is low; the nitrogen dioxide can be treated only by the photocatalytic reactor, the CO treatment needs to be carried out in a container with a carbon monoxide absorbent, and the treatment efficiency of the treatment by the photocatalytic reactor or the absorbent is low, and the structure is complex.
Disclosure of Invention
Aiming at the problems that the existing tail gas treatment device is used for respectively treating harmful gases discharged by exceeding standards and is complex in structure, the utility model aims to provide the sliding arc plasma tail gas treatment device which is used for carrying out tail gas treatment by adopting sliding arc discharge plasma while realizing on-line detection of tail gas, and has the advantages of simple structure and high energy efficiency.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a slip arc plasma tail gas processing apparatus, includes the detection mechanism that is used for on-line measuring gas and is used for handling harmful gas to carry out catalytic treatment to the gas that detects harmful substance concentration, processing mechanism includes the slip arc reactor, be equipped with positive blade electrode and the negative blade electrode that are used for plasma discharge in the slip arc reactor, be equipped with the nozzle that is used for letting in the gaseous after the detection in the centre of positive blade electrode and the negative blade electrode.
In the technical scheme, the gas to be detected is introduced into the detection mechanism, the gas is sprayed out from the nozzle after the gas content is detected, after the two blade electrodes are connected with the high-voltage power supply, breakdown occurs at the shortest distance between the two blade electrodes, discharge plasma is generated, the discharge plasma is pushed to slide upwards by the air flow entering from the bottom of the sliding arc reactor and sprayed out from the nozzle, so that sliding arc discharge plasma is formed, and a plasma discharge area between the blade electrodes is catalyzed, wherein harmful substances such as CO, NOx and H are contained 2 S etc. will be converted into CO 2 、N 2 、H 2 The harmless substances such as O and the like are discharged, and the detection technology and the plasma technology are combined, so that the integrated detection and treatment can be realizedIn the chemical process, the sliding arc plasma is adopted for tail gas treatment, and the chemical bond fracture is excited through vibration, so that higher energy efficiency can be realized.
The utility model is further arranged to: the distance between the positive blade electrode and the negative blade electrode gradually increases along the flow direction of the gas blown by the nozzle. Breakdown occurs at the shortest distance between the two blade electrodes, so that discharge plasma is generated, and the discharge plasma is pushed to slide upwards by air flow to form sliding arc discharge plasma.
The utility model is further arranged to: the positive blade electrode and the negative blade electrode are symmetrically arranged. The two blade electrodes are axisymmetrically distributed in bilateral symmetry, so that the sliding arc discharge plasma between the blade electrodes can be conveniently generated.
The utility model is further arranged to: the sliding arc reactor is filled with a catalyst. The sliding arc reactor is a reaction chamber, and the inside of the reactor can be filled with a catalyst, such as a metal catalyst.
The utility model is further arranged to: and a CRDS detection system unit is arranged at the top of the sliding arc reactor. And (3) enabling the tail gas after the catalytic treatment to enter a CRDS detection system unit, confirming the tail gas treatment condition, and if residues exist, performing secondary catalytic treatment.
The utility model is further arranged to: the detection mechanism comprises a CRDS optical cavity for carrying out absorption spectrum detection, a detector, an oscilloscope and a computer for analyzing and processing oscillographic waveforms. The method comprises the steps of blowing gas to be detected into a CRDS optical cavity, detecting the content of the gas by adopting a trace gas detection technology based on an optical cavity ring-down spectrum, feeding back detection concentration information into an oscilloscope through a detector, analyzing and processing an oscilloscope waveform in a computer, displaying the detection concentration in real time, and combining the CRDS detection technology with a plasma technology to realize the trace gas detection and processing integrated flow.
The utility model is further arranged to: still including being used for holding the gas pitcher of clean gas and being used for changing the three-way valve of medium flow direction, gas pitcher and three-way valve pass through first pipeline connection, the one end that first pipeline is close to the gas pitcher stretches into in the gas pitcher, the junction of first pipeline and gas pitcher is equipped with the seal structure that is used for preventing the gas escape that awaits measuring. After detection and catalytic treatment, the gas to be detected is discharged through a three-way valve and an exhaust structure in the gas tank, clean gas stored in the gas tank is discharged, residual harmful gas after treatment is discharged through a detection mechanism and a treatment mechanism in sequence, and a sealing structure at the joint of the first pipeline and the gas tank is used for preventing the gas to be detected from escaping out of the gas tank.
The utility model is further arranged to: the three-way valve is connected with the CRDS optical cavity through a second pipeline, and a first one-way valve is arranged on the second pipeline. Before the gas to be detected is introduced into the detection mechanism, the flow direction of a medium is changed through a three-way valve, the gas to be detected stored in the gas tank is guided into the CRDS optical cavity along a first pipeline and a second pipeline, the content of the gas is detected by adopting a trace gas detection technology based on an optical cavity ring-down spectrum, and the first one-way valve prevents the gas to be detected from being sucked backwards.
The utility model has the advantages that: (1) The tail gas is treated by adopting sliding arc discharge plasma while the tail gas is detected online, so that the structure is simple and the energy efficiency is high; (2) The detection technology and the plasma technology are combined, so that a detection and treatment integrated flow can be realized, the tail gas is treated by adopting sliding arc plasma, and higher energy efficiency can be realized by vibration excitation of chemical bond fracture; (3) And (3) enabling the tail gas after the catalytic treatment to enter a CRDS detection system unit, confirming the tail gas treatment condition, and if residues exist, performing secondary catalytic treatment.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic diagram of a sliding arc plasma tail gas treatment device according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of the fourth embodiment.
Reference numerals: the device comprises a detection mechanism 1, a CRDS optical cavity 1.1, a detector 1.2, a processing mechanism 2, a sliding arc reactor 3, a positive blade electrode 3.1, a negative blade electrode 3.2, a nozzle 3.3, a gas tank 4, a three-way valve 5, a first pipeline 6.1, a second pipeline 6.2, a third pipeline 6.3, a fourth pipeline 6.4, a first one-way valve 7.1 and a second one-way valve 7.2.
Detailed Description
The utility model is further described below with reference to the drawings and specific examples.
Embodiment one:
referring to fig. 1 and 2, a sliding arc plasma tail gas treatment device comprises a detection mechanism 1 for detecting gas to be detected on line and a treatment mechanism 2 for treating harmful gas, wherein the treatment mechanism 2 comprises a sliding arc reactor 3, two positive blade electrodes 3.1 and negative blade electrodes 3.2 for discharging plasma are arranged in the sliding arc reactor 3, a nozzle 3.3 for introducing detected gas is arranged between the two blade electrodes, and the distance between the positive blade electrodes 3.1 and the negative blade electrodes 3.2 gradually increases along the flowing direction of the blown gas of the nozzle 3.2. A gap is provided between the nozzle 3.3 and the blade electrode 3.1. The detection mechanism 1 comprises a CRDS optical cavity 1.1 for carrying out absorption spectrum detection, a detector 1.2, an oscilloscope and a computer for analyzing and processing oscillographic waveforms. The two blade electrodes 3.1 are arranged symmetrically. The sliding arc reactor 3 is filled with a catalyst. The top of the sliding arc reactor 3 is provided with a CRDS detection system unit.
In the above technical scheme, the gas to be detected is introduced into the detection mechanism 1, the gas is sprayed out from the nozzle 3.3 after the gas content is detected, after the two blade electrodes are connected to the high-voltage power supply, breakdown occurs at the shortest distance between the two blade electrodes, so as to generate discharge plasma, the discharge plasma is pushed to slide upwards by the air flow entering from the bottom of the sliding arc reactor 3 and sprayed out from the nozzle 3.3, so that the sliding arc discharge plasma is formed, and the plasma discharge area between the blade electrodes is catalyzed, wherein harmful substances such as CO, NOx and H are contained in the plasma discharge area between the blade electrodes 2 S etc. will be converted into CO 2 、N 2 、H 2 The harmless substances such as O and the like are discharged, the detection technology and the plasma technology are combined, the detection and treatment integrated flow can be realized, the sliding arc plasma is adopted for tail gas treatment, and the tail gas treatment is realized throughVibration excites chemical bond cleavage, and higher energy efficiency can be achieved.
The optical cavity ring-down spectroscopy (CRDS) is used as an absorption spectrum detection technology, and the ring-down time of light in the ring-down cavity is measured, and is only related to the reflectivity of a ring-down cavity reflector and the absorption of a medium in the ring-down cavity, and is not influenced by the intensity of incident light, so that the optical cavity ring-down spectroscopy (CRDS) has the advantages of high sensitivity, high signal-to-noise ratio, strong anti-interference capability and the like, and is suitable for the detection of various trace gases.
A gap is reserved between the nozzle 3.3 and the blade electrode so that the air flow can be conveniently dispersed in the discharge area. The method comprises the steps of blowing gas to be detected into a CRDS optical cavity 1.1, detecting the content of the gas by adopting a trace gas detection technology based on an optical cavity ring-down spectrum, feeding back detection concentration information into an oscilloscope through a detector 1.2, analyzing and processing an oscilloscope waveform in a computer, displaying the detection concentration in real time, and combining the CRDS detection technology with a plasma technology to realize the trace gas detection and processing integrated flow. The two blade electrodes are axisymmetrically distributed in bilateral symmetry, so that the sliding arc discharge plasma between the blade electrodes can be conveniently generated. The sliding arc reactor 3 is a reaction chamber, and the inside thereof may be filled with a catalyst, such as a metal catalyst, or the like. And (3) enabling the tail gas after the catalytic treatment to enter a CRDS detection system unit, confirming the tail gas treatment condition, and if residues exist, performing secondary catalytic treatment.
Embodiment two:
as shown in fig. 3, on the basis of the first embodiment, the device further comprises a gas tank 4 for containing clean gas and a three-way valve 5 for changing the flow direction of a medium, wherein the gas tank 4 is connected with the three-way valve 5 through a first pipeline 6.1, one end of the first pipeline 6.1, which is close to the gas tank 4, stretches into the gas tank 4, and a sealing structure for preventing the gas to be measured from escaping is arranged at the joint of the first pipeline 6.1 and the gas tank 4. The three-way valve 5 is connected with the CRDS optical cavity 1.1 through a second pipeline 6.2, and a first one-way valve 7.1 is arranged on the second pipeline 6.2. The CRDS optical cavity 1.1 is connected with the processing mechanism 2 through a third pipeline 6.3, and the nozzle 3.2 is arranged at the bottom end of the third pipeline 6.3, which is close to the processing mechanism 2. The top of the treatment mechanism 2 is provided with a fourth pipeline 6.4 for air outlet, and the fourth pipeline 6.4 is provided with a second one-way valve 7.2.
In the above technical scheme, before the gas to be tested is introduced into the detection mechanism 1, the flow direction of the medium is changed through the three-way valve 5, the gas to be tested stored in the gas tank 4 is sucked out, and the sealing structure at the joint of the first pipeline 6.1 and the gas tank 4 is used for preventing the gas to be tested from escaping outside the gas tank 4. After the gas to be detected is detected and catalyzed, the clean gas stored in the gas tank is discharged through the three-way valve and the exhaust structure in the gas tank, and the residual harmful gas after treatment is discharged through the detection mechanism and the treatment mechanism in sequence. The trace gas detection technology based on the cavity ring-down spectrum is adopted to detect the content of the gas, and the first one-way valve 7.1 prevents the back suction of the gas to be detected. After the detection of the concentration of harmful substances by the detection means 1, the gas is ejected into the processing means 2 along the third pipe 6.3 by the nozzle 3.2 at the bottom end of the processing means 2. The catalytically treated gas is discharged along the fourth conduit 6.4 and the second non-return valve 7.2 prevents the inflow of outside air into the treatment mechanism 2.
Embodiment III:
referring to fig. 4, the opening of the nozzle 3.3 is flat, so that the airflow ejected from the nozzle 3.3 is increased, and the efficiency of the catalytic treatment in the plasma discharge region is increased.
The foregoing embodiments are provided for further explanation of the present utility model and are not to be construed as limiting the scope of the present utility model, and some insubstantial modifications and variations of the present utility model, which are within the scope of the utility model, will be suggested to those skilled in the art in light of the foregoing teachings.
Claims (8)
1. The utility model provides a slip arc plasma tail gas processing apparatus, includes detection mechanism (1) that are used for on-line measuring gas and is used for handling harmful gas's processing mechanism (2) to carry out catalytic treatment to the gas that detects harmful substance concentration, a serial communication port, processing mechanism (2) are including slip arc reactor (3), be equipped with positive blade electrode (3.1) and negative blade electrode (3.2) that are used for plasma discharge in slip arc reactor (3), be equipped with in the centre of positive blade electrode (3.1) and negative blade electrode (3.2) and be used for letting in gaseous nozzle (3.3) after the detection.
2. A sliding arc plasma tail gas treatment device according to claim 1, characterized in that the spacing between the positive blade electrode (3.1) and the negative blade electrode (3.2) is progressively greater in the direction of flow of the blowing gas from the nozzle (3.3).
3. A sliding arc plasma tail gas treatment device according to claim 1 or 2, characterized in that the positive blade electrode (3.1) and the negative blade electrode (3.2) are symmetrically arranged.
4. The sliding arc plasma tail gas treatment device according to claim 1, characterized in that the sliding arc reactor (3) is filled with a catalyst.
5. The sliding arc plasma tail gas treatment device according to claim 1 or 4, characterized in that the top of the sliding arc reactor (3) is provided with a CRDS detection system unit.
6. The sliding arc plasma tail gas processing apparatus of claim 1, wherein the detection mechanism (1) comprises a CRDS optical cavity (1.1) for performing absorption spectrum detection, a detector (1.2), an oscilloscope, and a computer for analyzing an oscilloscope waveform.
7. The sliding arc plasma tail gas treatment device according to claim 1, further comprising a gas tank (4) for containing clean gas and a three-way valve (5) for changing the flow direction of the medium, wherein the gas tank (4) is connected with the three-way valve (5) through a first pipe (6.1), and one end of the first pipe (6.1) close to the gas tank (4) extends into the gas tank (4).
8. The sliding arc plasma tail gas treatment device according to claim 7, wherein the three-way valve (5) is connected with the CRDS optical cavity (1.1) through a second pipeline (6.2), and the second pipeline (6.2) is provided with a first one-way valve (7.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320967092.5U CN220071215U (en) | 2023-04-24 | 2023-04-24 | Sliding arc plasma tail gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320967092.5U CN220071215U (en) | 2023-04-24 | 2023-04-24 | Sliding arc plasma tail gas treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220071215U true CN220071215U (en) | 2023-11-24 |
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ID=88829714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320967092.5U Active CN220071215U (en) | 2023-04-24 | 2023-04-24 | Sliding arc plasma tail gas treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220071215U (en) |
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- 2023-04-24 CN CN202320967092.5U patent/CN220071215U/en active Active
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