CN108854517B - Heating catalytic decomposition type air purification device for vehicle - Google Patents
Heating catalytic decomposition type air purification device for vehicle Download PDFInfo
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- CN108854517B CN108854517B CN201810552607.9A CN201810552607A CN108854517B CN 108854517 B CN108854517 B CN 108854517B CN 201810552607 A CN201810552607 A CN 201810552607A CN 108854517 B CN108854517 B CN 108854517B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
Abstract
The invention relates to a heating catalytic decomposition type air purification device for a vehicle, which comprises an air inlet pipe (2), an air pump (3) and a heat insulation pipe (9), wherein a heat exchange pipe (12) and a hollow radial flow type catalytic reactor which are mutually connected are arranged inside the heat insulation pipe (9); the heat exchange tube (12) is connected with the air pump (3); air enters the air purification device through an air inlet pipe (2), is preheated at a heat exchange pipe (12), catalytically decomposes volatile organic pollutants in the air in a hollow radial flow-type catalytic reactor, and then clean air flows out from an outlet of a heat insulation pipe (9). Compared with the prior art, the invention has the advantages of high catalytic degradation efficiency, high heat energy utilization rate, low outlet airflow temperature, small air resistance and the like.
Description
Technical Field
The invention relates to an air purification device, in particular to a heating catalytic decomposition type air purification device.
Background
Volatile organic pollutants in a vehicle are the most main types of pollutants in a carriage, the sources of the pollutants comprise emission of automotive interior components, external introduction and reaction generation, and the types of the substances comprise formaldehyde, acetaldehyde, diethyl ether, benzene, toluene, xylene, trimethylbenzene, chlorobenzene and the like. The current main ways for removing volatile organic compounds in the automobile comprise two ways of adsorption and reaction. The adsorption method cannot eradicate VOCs and is easy to generate secondary pollution, and the adsorption part is frequently replaced when needed. The photocatalysis method in the reaction method uses ultraviolet or visible light to excite a catalyst to generate free radicals so as to remove volatile organic compounds, but the reaction efficiency is low, and low-content volatile organic compounds with the pollution level of common automobiles cannot be removed. The oxygen anion reaction method in the reaction method has the problems of low oxygen anion generation rate and short service life, and is easy to generate a large amount of ozone and negative nitrogen ion byproducts to cause serious secondary pollution.
The development of the existing catalytic technology provides a new path for the degradation of organic pollutants in the air, the VOCs in the air can be efficiently removed by a thermal catalytic degradation method, but the temperature of the exhausted clean air is high, the temperature control and the effective utilization of heat energy in a vehicle are not facilitated, and the wind resistance is large.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned drawbacks of the prior art and to provide a heating catalytic decomposition type air purification apparatus for a vehicle.
The purpose of the invention can be realized by the following technical scheme:
a vehicle heating catalytic decomposition type air purification device comprises an air inlet pipe, an air pump and a heat insulation pipe, wherein a heat exchange pipe and a hollow radial flow type catalytic reactor which are connected with each other are arranged in the heat insulation pipe; the heat exchange tube is connected with the air pump; air enters the air purification device through an air inlet pipe, is preheated at the heat exchange pipe, is catalytically decomposed in the hollow radial flow type catalytic reactor, and then flows out from the outlet of the heat insulation pipe.
Further, the hollow radial flow type catalytic reactor comprises an inner hollow heating wire spiral pipe, an outer air-permeable porous pipe and a catalyst layer filled between the inner layer and the outer layer.
Furthermore, the heating wire spiral tube is formed by spirally winding the heating wire, air entering the heating wire spiral tube is subjected to electric heating and then is radially diffused to the catalyst layer through gaps among the spiral heating wires, and after catalytic decomposition, organic pollutants in the air are degraded into CO2And water flows out from the air-permeable porous pipe and then flows along the inner wall of the heat insulation pipe to the outlet.
Furthermore, a heating wire joint a and a joint b of the heating wire spiral tube are respectively arranged at two ends of the heating wire spiral tube, and an inlet of a hollow cavity in the heating wire spiral tube is connected with an outlet of the heat exchange tube.
4 supporting bars are arranged between the air-permeable porous pipe and the heat-insulating pipe, so that a fixed gap is formed between the air-permeable porous pipe and the heat-insulating pipe, and air can enter the heat-insulating pipe from the air-permeable porous pipe. The supporting strips are distributed in a cross shape, cross-shaped intersection points are arranged on the axis of the heat-insulating pipe, the supporting strips are rectangular heat-resistant plastic strips, and the length of the supporting strips is the same as that of the ventilating porous pipe. A gap of 2-20 mm is arranged between the heat insulation pipe and the air-permeable porous pipe. The heat-insulating pipe is a hollow pipe with one open end and one closed end, the open end of the heat-insulating pipe is connected with the side wall of the air purification device, the open end is a gas outlet of the air purification device, the heat exchange pipe is arranged at the open end of the heat-insulating pipe, and the hollow radial flow type catalytic reactor is arranged at the closed end of the heat-insulating pipe. And a ceramic seal head a and a ceramic seal head b are respectively arranged at two ends of the hollow radial flow type catalytic reactor so as to fix a multilayer structure in the reactor.
The heat exchange tube is externally provided with a heat exchanger spiral sheet, and the air inside the heat exchange tube and the high-temperature clean air discharged from the reactor perform countercurrent heat exchange, so that the air inside the heat exchange tube is preheated before flowing into the hollow radial flow-dispersing catalytic reactor, and the air discharged from the tube is cooled.
The air purification device also comprises an electric control plate, the electric control plate is connected with the heating wire spiral tube, the heat exchanger spiral sheet and the air pump to form real-time feedback regulation, and the electric control plate can control the operation power and the operation cycle of the heating wire spiral tube, the heat exchanger spiral sheet and the air pump according to a set program; a shock pad is arranged between the contact surface of the shell of the air purification device and the air pump; the periphery of the heat insulation pipe is coated with heat insulation materials.
Compared with the prior art, the hollow radial flow type catalytic reactor simultaneously realizes the support of a catalyst layer, the radial diffusion of reaction airflow and the heating and catalysis of volatile organic compounds, and has good reaction effect; the design of the heat exchanger can control the temperature rise of the outlet gas and simultaneously recover a part of heat, and the consumed electric power is reduced, so that the heat efficiency is integrally improved; the temperature of the discharged fresh air is lower, which is beneficial to the temperature control in the vehicle; the air inlet and the air outlet are distributed diagonally, so that the air circulation is improved, the air flow resistance in the device is small, the device is compact, and the occupied space is small.
Drawings
FIG. 1 is a schematic structural view of a heating catalytic decomposition type air cleaning apparatus for a vehicle according to the present invention;
FIG. 2 is a schematic structural view of a hollow radial flow catalytic reactor according to the present invention.
In the figure: 1. the device comprises an electric control board, 2, an air inlet pipe, 3, an air pump, 4, heating wire spiral pipes, 51, heating wire joints a and 52, heating wire joints b and 6, a catalyst layer, 7, a breathable porous pipe, 81, porcelain seal heads a and 82, porcelain seal heads b and 9, a heat insulation pipe, 10, heat exchanger spiral sheets, 11, support bars, 12, heat exchange pipes and 13 gaps.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
A vehicle heating catalytic decomposition type air purification device, as shown in figure 1, comprises an air inlet pipe 2, an air pump 3 and a heat insulation pipe 9, wherein a heat exchange pipe 12 and a hollow radial flow type catalytic reactor which are connected with each other are arranged inside the heat insulation pipe 9; the heat exchange tube 12 is connected with the air pump 3; the air enters the hollow radial-flow type catalytic reactor to be catalytically decomposed and then flows out from the outlet of the heat-insulating pipe 9.
Hollow radial flow catalytic reactor: as shown in fig. 2, a hollow heating wire spiral tube 4 including an inner layer, an air-permeable porous tube 7 of an outer layer, and a catalyst layer 6 filled between the inner layer and the outer layer. The heating wire spiral tube 4 is formed by spirally winding the heating wire. A heating wire joint a 51 and a joint b 52 of the heating wire spiral tube 4 are respectively provided at both ends of the heating wire spiral tube 4, and an inlet of a hollow cavity inside the heating wire spiral tube 4 is connected with an outlet of the heat exchange tube 12. 4 supporting bars are arranged between the air-permeable porous pipe 7 and the heat-insulating pipe 9, so that a fixed gap is reserved between the air-permeable porous pipe 7 and the heat-insulating pipe 9, and air can enter the heat-insulating pipe from the air-permeable porous pipe. The supporting strips are distributed in a cross shape, cross-shaped intersection points are arranged on the axis of the heat-insulating pipe, the supporting strips are rectangular heat-resistant plastic strips, and the length of the supporting strips is the same as that of the ventilating porous pipe. . A gap 13 of 2-20 mm is arranged between the heat insulation pipe 9 and the air-permeable porous pipe 7. The heat insulation pipe 9 is a hollow pipe with one open end and one closed end, the open end of the heat insulation pipe is connected with the side wall of the air purification device, the open end is a gas outlet of the air purification device, the heat exchange pipe 12 is arranged at the open end of the heat insulation pipe 9, and the hollow radial flow type catalytic reactor is arranged at the closed end of the heat insulation pipe 9. The heat exchange tube 12 is externally provided with a heat exchanger spiral sheet 10.
The two ends of the hollow radial flow type catalytic reactor are respectively provided with a ceramic seal head a 81 and a ceramic seal head b 82 as shown in figure 1, so as to fix the multilayer structure in the reactor. The air purification device also comprises an electric control board 1; a shock pad is arranged between the contact surface of the shell of the air purification device and the air pump 3; the periphery of the heat insulation pipe 9 is coated with heat insulation materials, and the machine body does not obviously increase the temperature during operation.
During the use, set well the operating power and the operation cycle of controlling heating wire spiral pipe 4, heat exchanger flight 10, air pump 3 according to the demand, automatically controlled board 1 is connected with heating wire spiral pipe 4, heat exchanger flight 10, air pump 3, forms real-time feedback control. Air enters the air purification device through the air inlet pipe 2 and is preheated at the heat exchange pipe 12, as shown in figure 1, when the spiral fins 10 of the heat exchanger rotate, the driving direction of the air is opposite to the flowing direction of the air inside the heat exchange pipe 12, and the air at the two positions forms countercurrent heat exchange, so that the air in the heat exchange pipe 12 is slowly heated before flowing into the hollow radial-flow-type catalytic reactor. After entering the heating wire spiral tube 4, the air is heated by electric heat and is radially diffused to the catalyst layer 6 through gaps among the spiral heating wires, after catalytic decomposition, organic pollutants in the air are degraded into carbon dioxide and water, and then flow out from the air-permeable porous tube 7 and flow to an outlet along the inner wall of the heat insulation tube 9. Benzene in the discharged fresh air is less than or equal to 0.11mg/m3Toluene is less than or equal to 1.10mg/m3Xylene is less than or equal to 1.50mg/m3Ethylbenzene is less than or equal to 1.50mg/m3Styrene is less than or equal to 0.26mg/m3Formaldehyde is less than or equal to 0.10mg/m3Acetaldehyde is less than or equal to 0.05mg/m3Acrolein is less than or equal to 0.055mg/m3。
Claims (4)
1. A vehicle heating catalytic decomposition type air purification device is characterized by comprising an air inlet pipe (2), an air pump (3) and a heat insulation pipe (9), wherein a heat exchange pipe (12) and a hollow radial flow type catalytic reactor which are mutually connected are arranged inside the heat insulation pipe (9); the heat exchange tube (12) is connected with the air pump (3); air enters the air purification device through an air inlet pipe (2), is preheated at a heat exchange pipe (12), catalytically decomposes volatile organic pollutants in the air in a hollow radial flow-dispersed catalytic reactor, and then clean air flows out from an outlet of a heat insulation pipe (9);
the hollow radial flow-dispersing catalytic reactor comprises a hollow heating wire spiral pipe (4) at the inner layer, a ventilating porous pipe (7) at the outer layer and a catalyst layer (6) filled between the inner layer and the outer layer;
the heating wire spiral pipe (4) is formed by spirally winding the heating wire, air entering the heating wire spiral pipe (4) is heated by the heating wire and then radially diffused to the catalyst layer (6) through gaps among the spiral heating wires, and after volatile organic pollutants in the air are catalytically decomposed, clean air flows out from the air-permeable porous pipe (7) and then flows to the outlet along the inner wall of the heat insulation pipe (9);
a supporting strip (11) is arranged between the air-permeable porous pipe (7) and the heat-insulating pipe (9) to keep a gap (13) of 2-20 mm between the air-permeable porous pipe (7) and the heat-insulating pipe (9);
the heat insulation pipe (9) is a hollow pipe with one open end and one closed end, the open end of the heat insulation pipe is connected with the side wall of the air purification device, the open end is a gas outlet of the air purification device, the heat exchange pipe (12) is arranged at the open end of the heat insulation pipe (9), and the hollow radial flow-dispersing catalytic reactor is arranged at the closed end of the heat insulation pipe (9);
and a ceramic seal head a (81) and a ceramic seal head b (82) are respectively arranged at two ends of the hollow radial flow type catalytic reactor.
2. The heating catalytic decomposition type air cleaning device for vehicle as claimed in claim 1, wherein the heating wire joints a (51) and b (52) of the heating wire spiral tube (4) are respectively provided at both ends of the heating wire spiral tube (4), and the outlet of the heat exchanging tube (12) is connected to the inlet of the hollow cavity inside the heating wire spiral tube (4).
3. A heating catalytic decomposition type air cleaning device for vehicle according to claim 1, wherein the heat exchange tube (12) is externally provided with a heat exchanger fin (10).
4. A heating catalytic decomposition type air cleaning device for vehicle according to claim 1, further comprising an electric control board (1); a shock pad is arranged between the contact surface of the shell of the air purification device and the air pump (3); the periphery of the heat insulation pipe (9) is coated with heat insulation materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810552607.9A CN108854517B (en) | 2018-05-31 | 2018-05-31 | Heating catalytic decomposition type air purification device for vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810552607.9A CN108854517B (en) | 2018-05-31 | 2018-05-31 | Heating catalytic decomposition type air purification device for vehicle |
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| CN108854517A CN108854517A (en) | 2018-11-23 |
| CN108854517B true CN108854517B (en) | 2021-03-30 |
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| CN112924320A (en) * | 2021-01-25 | 2021-06-08 | 日照公路建设有限公司 | Water content measuring mechanism of automatic raw material sampling equipment |
| CN114904386B (en) * | 2021-02-08 | 2023-08-08 | 中国石油化工股份有限公司 | Organic waste gas treatment device and application method thereof |
| CN113719953B (en) * | 2021-10-08 | 2023-02-10 | 杭州科技职业技术学院 | Dehumidification and photo-thermal catalysis synergistic air purification system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3977833A (en) * | 1972-05-15 | 1976-08-31 | Montecatini Edison S.P.A. | Apparatus for the production of formaldehyde |
| US3920404A (en) * | 1974-09-11 | 1975-11-18 | Ford Motor Co | Catalyst converter |
| DE3731688A1 (en) * | 1987-09-21 | 1989-03-30 | Degussa | METHOD FOR THE CATALYTIC IMPROVEMENT OF HYDROCARBON, HALOGEN CARBON HYDROGEN AND CARBON MONOXIDE CONTAINING EXHAUST GASES |
| JP2001073742A (en) * | 1999-06-29 | 2001-03-21 | Sumitomo Electric Ind Ltd | Particulate trap for diesel engine |
| CN102160981B (en) * | 2010-02-24 | 2015-01-07 | 杭州林达化工技术工程有限公司 | Catalytic reaction equipment |
| CN102205207B (en) * | 2011-04-11 | 2013-06-19 | 山东理工大学 | Coal mine methane preheating catalytic oxidation device with multiple reaction chambers |
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