CN117180947A - A device that uses plasma to deeply purify soot and exhaust gas - Google Patents
A device that uses plasma to deeply purify soot and exhaust gas Download PDFInfo
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- CN117180947A CN117180947A CN202311389016.1A CN202311389016A CN117180947A CN 117180947 A CN117180947 A CN 117180947A CN 202311389016 A CN202311389016 A CN 202311389016A CN 117180947 A CN117180947 A CN 117180947A
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Abstract
The device relates to a device for deeply purifying soot waste gas by adopting plasmas, which comprises a filter cavity, an activated carbon cavity, a dual-medium plasma cavity, an electrostatic adsorption cavity and the like. The device is characterized in that: firstly, carrying out gas-solid separation on the soot waste gas, then adsorbing in an active carbon cavity, purifying in a plasma reaction cavity after the adsorption is finished, and finally, detecting whether the gas accords with an emission standard through a gas detector to determine whether deep purification is continued. Wherein the active carbon cavity and the plasma cavity are slot drawer type. The device has the characteristics of convenient installation, high treatment efficiency, detachable cavity and the like, and can effectively solve the problems of various pollutant types, insufficient treatment and the like in the waste gas of the soot.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a device for deeply purifying soot waste gas by adopting plasma.
Background
Along with the improvement of the living standard of people, the power industry is also continuously developing. At present, thermal power generation, wind power generation, hydroelectric power generation, nuclear power generation, solar power generation and the like exist in the power industry, wherein the thermal power generation is one of indispensable power generation modes. Taking 2022 as an example all the year round, the total national power generation amount is 83886.3 hundred million kilowatt-hours, the thermal power generation amount is 58531.3 hundred million kilowatt-hours, and the proportion of the thermal power generation amount to the total national power generation amount is 69.77%, which is dominant in the power industry. Coal is one of the indispensable raw materials in thermal power generation, a large amount of flue gas is generated in the process of coal combustion, and a large amount of dust and pollutants are also present in the generated flue gas, so that irreversible damage is caused to the nearby environment and residents.
At present, most of the treatment modes of the soot waste gas and dust are treated by sprinkling, wherein sprinkling is continuously carried out around the whole power plant through equipment such as a sprinkling truck, and although the content of dust in the soot waste gas can be effectively reduced, gaseous pollutants in the smoke cannot be effectively controlled, and a large amount of water resource waste is also caused by continuous sprinkling. In addition, the amount and the variety of pollutants in the waste gas of the soot are various, solid pollutants in the flue gas can be adsorbed on the cavity of the purifying equipment and are not easy to clean, and the solid pollutants can also block the pipeline to influence the normal operation of the equipment; the gas pollutants are also difficult to clean at a time. It is therefore difficult for a single stationary cleaning device to completely clean contaminants in the flue gas at one time.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore may contain information that does not form the prior art that is already known in the country to a person of ordinary skill in the art.
Disclosure of Invention
Aiming at the problems, the invention provides a device for deeply purifying soot and exhaust gas by adopting plasma.
The invention aims at realizing the following technical scheme that the device for deeply purifying the soot waste gas by adopting the plasmas comprises:
the gas-solid separation cavity is arranged at the uppermost end of the whole device, one end of the gas-solid separation cavity is communicated with the air inlet pipeline, and the other end of the gas-solid separation cavity is communicated with the first gas storage bin;
the active carbon adsorption cavity is arranged at the lower end of the gas-solid separation cavity, one end of the active carbon adsorption cavity is communicated with the air inlet pipeline, and the other end of the active carbon adsorption cavity is communicated with the second gas storage bin;
the plasma reaction cavity is arranged at the lower end of the active carbon adsorption cavity, one end of the plasma reaction cavity is communicated with the air inlet pipeline, and the other end of the plasma reaction cavity is communicated with the air outlet pipeline;
a gas distribution plate disposed in the plasma reaction chamber, the gas distribution plate being provided with a plurality of through holes for uniformly introducing the gas from the gas inlet pipe;
a plasma electrode disposed in the plasma reaction chamber to discharge plasma, the plasma electrode being operable to regulate ion energy of the plasma;
an induction coil disposed outside the plasma power generation tube, the induction coil being capable of adjusting a density of the plasma;
the electrostatic adsorption cavity is arranged at the lower end of the plasma reaction cavity, one end of the electrostatic adsorption cavity is communicated with the air inlet pipeline, and the other end of the electrostatic adsorption cavity is communicated with the air outlet pipeline;
the water cooling device is arranged at the lower end of the electrostatic adsorption cavity and is used for cooling the electrostatic adsorption cavity;
a gas detector arranged at the lower end of the water-cooling cavity, wherein the gas detector is used for detecting purified gas;
the reflux device is arranged at the lower end of the gas detector, one end of the reflux pipe is communicated with the gas outlet pipe, the other end of the reflux pipe is communicated with the gas inlet pipe, and the reflux pipe is used for secondarily purifying the gas which is not purified completely.
Further, a filter basket is arranged in the gas-solid separation cavity, and the gas-solid separation cavity is a slot drawer type cavity.
Further, the active carbon adsorption cavity is an independent cavity, and the active carbon adsorption cavity is a slot drawer type cavity.
Further, the plasma reaction cavity is an independent cavity, a plurality of plasma electrodes and induction coils are arranged in the plasma reaction cavity and used for adjusting the energy and density of plasma, and the cavity is a slot drawer type cavity.
Further, the plasma electrode is an external electrode, the electrode can respectively form a low-frequency power circuit and a high-frequency power circuit according to requirements, the working frequency of the low-frequency power circuit is 2-13.56MHz, and the working frequency of the high-frequency power circuit is 40.68-60MHz.
Further, the electrostatic adsorption cavity is an independent cavity, and the electrostatic adsorption cavity comprises a dielectric component, an electrostatic electrode and a heating body. The electrostatic chuck chamber may be, for example, a johnson-rahbek electrostatic chuck, or a coulomb force electrostatic chuck.
Further, the material of the dielectric member is, for example, ceramic such as alumina, aluminum nitride, or the like. The dielectric member has a thickness of, for example, 5mm to 10mm, and a relative dielectric constant of, for example, about 9 to 10 at a frequency of 1 kHz.
Further, the electrostatic electrode is, for example, a thin film electrode embedded in a dielectric member, may have a monopolar shape or a bipolar shape, and may be, for example, a sintered body of tungsten, molybdenum, or the like.
Further, the heating element may be embedded in the dielectric member, and for example, a sintered body of tungsten, molybdenum, or the like may be used, or a rolled alloy may be used.
Further, the water cooling device is used for water cooling the plasma cavity and the electrostatic adsorption cavity.
Further, a blower fan is provided in the reflow apparatus.
Further, the sealing flange is an axial O-ring seal.
Further, the gas-solid separation cavity, the active carbon adsorption cavity and the connection part of the plasma reaction cavity and the pipeline are sealed.
Further, the pipelines are sealed.
Compared with the prior art, the invention has the following advantages:
1. the invention firstly separates the gas from the solid, separates the larger solid pollutant in the waste gas of the soot, can avoid particles from blocking the pipeline and affecting the normal operation of the equipment, and the gas-solid separation cavity adopts a slot drawer type cavity, thereby being convenient for replacing the filter basket and cleaning the gas-solid separation cavity.
2. Then the waste gas enters an active carbon adsorption cavity to be adsorbed, fine solid particles in the waste gas of the soot can be adsorbed to a greater extent, the cavity adopts a slot drawer type cavity, when the adsorption capacity of the active carbon is reduced, new active components can be added at any time, and other particle oxide catalysts can be put in according to the level of specific pollutant components in the flue gas; on the other hand, the cavity can be cleaned at any time, and the environment of the cavity is ensured.
3. Then enters a plasma reaction cavity, wherein a plasma power generation tube is arranged in the plasma reaction cavity, and an external electrode is arranged in the plasma reaction cavity. The plasma generated by the discharge of the external electrode can avoid the problem of electrode pollution, and the electrode can be coupled with low-frequency power and high-frequency power by matching with an induction coil so as to flexibly regulate and control the ion density and ion energy of the plasma. On the other hand, the plasma reaction cavity adopts a slot drawer type cavity, so that the plasma power generation tube and the environment in the cleaning cavity can be replaced conveniently.
4. The soot waste gas enters the electrostatic adsorption cavity after being purified in the plasma reaction cavity, and the electrostatic adsorption cavity can adsorb charged charges to ensure the balance of charges in the cavity.
5. The gas detector is arranged on the gas after the primary purification, and the purified gas is detected, so that the purification efficiency is ensured.
6. The reflux device is arranged, so that the once unpurified gas enters the air inlet pipe again for purification under the action of the blower fan in the pipeline, and the purification quality is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, wherein the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the front structure of a device for deeply purifying soot exhaust gas by using plasma;
FIG. 2 is a schematic cross-sectional view of a device for deeply purifying soot exhaust gas by using plasma according to the present invention;
FIG. 3 is a schematic diagram of a gas-solid separation chamber of a device for deeply purifying soot exhaust gas by using plasma;
FIG. 4 is a schematic diagram of a plasma reaction chamber structure of a device for deeply purifying soot exhaust gas by using plasma in the invention;
FIG. 5 is a schematic diagram of the electrostatic adsorption cavity and the water cooling device of the device for deeply purifying the soot exhaust gas by adopting plasma;
reference numerals in the drawings: 1. a total air inlet; 2. an air inlet pipe; 3. a gas-solid separation chamber; 4. a drawer valve number one; 5. a gas storage bin; 6. an air inlet pipe; 7. an activated carbon adsorption chamber; 8. a gas storage bin; 9. a gas distribution plate; 10. an external electrode; 11. a plasma power generation tube; 12. a frequency-dependent induction coil power supply; 13. a third drawer valve; 14. an electrostatic electrode; 15. a cooling device; 16. a gas storage bin; 17. a gas detector; 18. an exhaust pipe; 19. a first pipeline control valve; 20. an exhaust pipe; 21. a second pipeline control valve; 22. a blower fan; 23. a return line; 24. a base; 25. a heating element; 26. an electrostatic adsorption cavity; 27. a fixing plate; 28. an induction coil; 29. a frequency power source; 30. a sealing flange; 31. a plasma reaction chamber; 32. a second drawer valve; 33. a cover plate; 34. a filter basket; 35. a sleeve; 36. a dielectric member.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "vertical," "horizontal," "inner," "outer," "one side," "another side," "both sides," "upper," "lower," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
For the purpose of facilitating an understanding of the embodiments of the present invention, reference will now be made to the drawings, by way of example, and specific examples of which are illustrated in the accompanying drawings.
An apparatus for deep purification of soot exhaust gas using plasma according to the embodiments shown in fig. 1 to 5, comprising: the device comprises a main air inlet 1, wherein the exhaust gas of the soot is introduced into a gas-solid separation cavity 3 through an air inlet pipe 2 from the main air inlet 1, a cover plate 33, a filter basket 34 and a sleeve 35 are arranged in the gas-solid separation cavity 3, a first drawer valve 4 is arranged on one side of the gas-solid separation cavity 3, and the first drawer valve 4 can be used for disassembling the gas-solid separation cavity 3 and changing the filter basket 34 and ensuring the environment in the gas-solid separation cavity 3; the lower side of the gas-solid separation cavity 3 is communicated with a gas storage bin 5, the gas storage bin 5 is connected with an activated carbon adsorption cavity 7 through an air inlet pipe 6, one side of the activated carbon adsorption cavity 7 is provided with a second drawer valve 32, the lower side of the activated carbon adsorption cavity is provided with a gas storage bin 8, the lower side of the gas storage bin is connected with a plasma reaction cavity 31, a gas distribution plate 9, a sealing flange 30, an external electrode 10, a plasma power generation tube 11, a frequency power source 29, an induction coil 28 and a frequency radiation induction coil power supply 12 are arranged in the plasma reaction cavity 31, the gas distribution plate 9 is arranged at the uppermost end of the plasma reaction cavity 31, the gas distribution plate 9 is welded on the inner wall of the plasma reaction cavity, micropores are formed in the gas distribution plate so as to uniformly distribute the introduced gas, the sealing flange 30 is connected to the two ends of the plasma power generation tube 11, the external electrode 10 is adhered to the side wall of the plasma generation tube 11 and is connected with the frequency power source 29, the frequency power source housing is grounded, and the induction coil 28 is sleeved outside the plasma generation tube 11 and is positioned at the lower side of the external electrode 10 and connected with the frequency radiation induction coil power supply 12; the plasma reaction chamber 31, the downside is connected with electrostatic adsorption chamber 26, electrostatic adsorption chamber 26 contains dielectric body 36, be equipped with electrostatic electrode 14 and heat-generating body 25 in the dielectric body 36, electrostatic adsorption chamber 26 downside is connected with cooling device 15, be provided with base 24 under the cooling device, the base 24 has gas storage bin 16 down, be connected with gas detector 17 under the gas storage bin 16, the gas detector communicates with blast pipe 18 and back flow 23 down, be equipped with pipeline control valve 19 on the blast pipe 18, be equipped with No. two control valves 21 and blower fan 22 in the back flow.
More specifically: the air inlet pipes 2 and 6 are respectively connected with the air-solid separation cavity 3 and the active carbon adsorption cavity 7 and are uniformly distributed.
More specifically: the plasma electrode is an external electrode 10, the electrode can respectively form a low-frequency power circuit and a high-frequency power circuit according to requirements, the working frequency of the low-frequency power circuit is 2-13.56MHz, the working frequency of the high-frequency power circuit is 40.68-60MHz, and the external electrode 10 is a brass electrode.
More specifically: the electrostatic adsorption cavity 26 is internally provided with a plurality of electrostatic electrodes 14 and heating bodies 25, and the electrostatic electrodes and the heating bodies 25 are uniformly distributed around the ventilation pipeline.
More specifically: the periphery of the return pipe 23 is provided with a fixed plate 27, one side of the return pipe 23 is connected with the plasma reaction cavity 31, and two ends of the return pipe are fixed by screw nuts.
The working process of the invention is as follows:
the soot waste gas enters the gas-solid separation cavity 3 from the total gas inlet 1 through the gas inlet pipeline 2, pollutants with larger particles in the soot waste gas are blocked at one side of the filter basket 34 under the action of the filter basket 34, and after the pollutants in the gas-solid separation cavity 3 are fully piled up, the first drawer valve 4 is opened, so that the pollutants can be intensively treated; the filter basket 34 may also be replaced according to the size of the contaminant diameter. After gas-solid separation is carried out, the waste gas of the soot enters an active carbon adsorption cavity 7 through a gas storage bin 5 and an air inlet pipe 6, the content of fine particles in the waste gas is reduced again, after the active components in the active carbon adsorption cavity 7 are reduced, a valve 32 of a second drawer can be opened, the active components are replaced, and the purification efficiency is ensured; then the waste gas of the soot is led into the plasma reaction cavity 31 through the gas storage bin 8, then is led into the plasma power generation tube 11 through the gas distribution plate 9, and is subjected to ionization, excitation, charge exchange, penning ionization and other reactions between electrons and molecules/atoms under the action of an electric field, so that plasma is formed, and chemical reaction is carried out with the waste gas of the soot, so that toxic and harmful substances in the waste gas of the soot are converted into carbon dioxide and water molecule substances. And then enters a gas detector 17 from the plasma power generation tube 11 through a gas storage bin 16 for detection. If the detected gas meets the requirement, opening a first pipeline control valve 19, closing a second pipeline control valve 21, and discharging the flue gas out of the room along with an exhaust pipeline 20; if the detected gas does not meet the requirement, the first pipeline control valve 19 is closed, the second pipeline control valve 21 is opened, and the gas is sucked into the gas inlet pipe again under the action of the blower fan 22 for a new round of purification until the purification requirement is met and discharged out of the room through the exhaust pipeline 20.
Claims (8)
1. A device for deep purification of soot exhaust gas using plasma, comprising: the utility model provides a gas separation chamber (3) is gone into through intake pipe (2) to soot waste gas in total air inlet (1), gas-solid separation chamber (3) and gas storage storehouse (5) equipment are equipped with through intake pipe (6) and active carbon adsorption chamber (7) intercommunication, active carbon adsorption chamber (7) and gas storage storehouse (8) equipment are fixed in plasma reaction chamber (31) upside, plasma reaction chamber (31) link up with electrostatic adsorption chamber (26), electrostatic adsorption chamber (26) one end intercommunication admission line, the other end intercommunication air outlet line, electrostatic adsorption chamber (26) and gas storage storehouse (16) equipment, gas storage storehouse (16) below links to each other with blast pipe (18), blast pipe (18) are equipped with gas detector (17) and are equipped with pipeline control valve (19) No. one in the downside, gas detector opposite side is equipped with backflow pipeline (23), backflow pipeline (23) are equipped with pipeline control valve (21) No. 21) and blast furnace fan (22).
2. The apparatus for deep purification of soot exhaust gas using plasma according to claim 1, wherein: one side of the gas-solid separation cavity (3) is provided with a first drawer valve (4) so that the gas-solid separation cavity (3) can be independently disassembled, and the gas-solid separation cavity (3) is composed of a cover plate (33), a filter basket (34) and a sleeve (35) which are connected with the air inlet pipe (2).
3. The apparatus for deep purification of soot exhaust gas using plasma according to claim 1, wherein: a large amount of activated carbon is evenly placed in the activated carbon adsorption cavity (7), the upper side is connected with the air inlet pipe (6), the lower side is communicated with the air storage bin (8), and a second drawer valve (32) is arranged at one end of the outer side so as to be convenient to detach.
4. The apparatus for deep purification of soot exhaust gas using plasma according to claim 1, wherein: the plasma reaction chamber (31) is internally provided with a gas distribution plate (9) which is welded at the uppermost end of the inner wall, the sealing flange (30) seals the plasma power generation tube (11), meanwhile, the external electrode (10) is fixed at the periphery of the plasma power generation tube (11), the frequency power source (29) is communicated with the external electrode (10), the induction coil (28) is communicated with the frequency induction coil power supply (12) and sleeved at the periphery of the plasma power generation tube (11) and is positioned at the lower side of the external electrode (10).
5. The apparatus for deep purification of soot exhaust gas using plasma according to claim 1, wherein: the electrostatic adsorption cavity (26) can be a coulomb force type electrostatic chuck, the thickness of the built-in dielectric body (36) is 5-10 mm, the material can be alumina, aluminum nitride and the like, and the electrostatic electrode (14) and the heating body (25) are embedded in the dielectric body (36).
6. The apparatus for deep purification of soot exhaust gas using plasma according to claim 1, wherein: the electrostatic electrode (14) may be a sintered body of tungsten, molybdenum, or the like, and the heating element (25) may be a sintered body of tungsten, molybdenum, or the like, or a rolled alloy.
7. The apparatus for deep purification of soot exhaust gas using plasma according to claim 1, wherein: the upper side of the cooling device (15) is connected with the electrostatic adsorption cavity (26), and the lower side of the cooling device is provided with a base (24) which is connected with the gas storage bin (16).
8. The apparatus for deep purification of soot exhaust gas using plasma according to claim 1, wherein: the fixing plate (27) is arranged outside the backflow pipeline (23), one end of the fixing plate is fixed on the backflow pipeline (23) through screws and nuts, and the other end of the fixing plate is fixed on the plasma reaction cavity (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311389016.1A CN117180947A (en) | 2023-10-24 | 2023-10-24 | A device that uses plasma to deeply purify soot and exhaust gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311389016.1A CN117180947A (en) | 2023-10-24 | 2023-10-24 | A device that uses plasma to deeply purify soot and exhaust gas |
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| CN117180947A true CN117180947A (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311389016.1A Pending CN117180947A (en) | 2023-10-24 | 2023-10-24 | A device that uses plasma to deeply purify soot and exhaust gas |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080170971A1 (en) * | 2006-08-09 | 2008-07-17 | Airinspace B.V. | Air purification devices |
| CN202605999U (en) * | 2012-05-16 | 2012-12-19 | 绍兴文理学院 | Coal-fired flue gas plasma purification device |
| CN114797460A (en) * | 2022-05-13 | 2022-07-29 | 昆明理工大学 | Component type low-temperature plasma waste gas purification device |
| CN219264276U (en) * | 2022-11-09 | 2023-06-27 | 哈尔滨理工大学 | A detachable plasma fluidized bed purification device for coal-fired flue gas |
-
2023
- 2023-10-24 CN CN202311389016.1A patent/CN117180947A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080170971A1 (en) * | 2006-08-09 | 2008-07-17 | Airinspace B.V. | Air purification devices |
| CN202605999U (en) * | 2012-05-16 | 2012-12-19 | 绍兴文理学院 | Coal-fired flue gas plasma purification device |
| CN114797460A (en) * | 2022-05-13 | 2022-07-29 | 昆明理工大学 | Component type low-temperature plasma waste gas purification device |
| CN219264276U (en) * | 2022-11-09 | 2023-06-27 | 哈尔滨理工大学 | A detachable plasma fluidized bed purification device for coal-fired flue gas |
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