CN219559259U - Ebullated bed photocatalysis treatment device of electronic industry organic waste gas - Google Patents
Ebullated bed photocatalysis treatment device of electronic industry organic waste gas Download PDFInfo
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- CN219559259U CN219559259U CN202320839555.XU CN202320839555U CN219559259U CN 219559259 U CN219559259 U CN 219559259U CN 202320839555 U CN202320839555 U CN 202320839555U CN 219559259 U CN219559259 U CN 219559259U
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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
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Abstract
The boiling bed photocatalysis treatment device for the organic waste gas in the electronic industry comprises a boiling bed photocatalysis reactor, a cyclone separator, a regenerator, a gas diversion regulating valve, a waste gas inlet fan, a separator inlet fan, an air inlet nozzle, an observation window, a photocatalyst adding port, a UV lamp tube and a UV lamp tube cover. The organic waste gas is fully contacted with a special TiO2-AC photocatalyst in the boiling bed to achieve the purpose of degradation.
Description
Technical Field
The utility model belongs to the field of organic waste gas treatment in the environmental protection industry.
Background
The industrial organic waste gas has great harm to the atmospheric quality and the human health, and has great significance for effectively controlling the pollutants. The control of industrial organic waste gas can usually adopt the measures of source control, clean production, terminal treatment, total amount control, scientific management and the like, but the terminal treatment is particularly important as the last defense line because the technical progress and the scientific management can not solve all the problems.
The emission of industrial organic waste gas relates to a wide range of industries, such as coating industry, pesticide and medicine industry, petrochemical industry, paint, ink and dye production, furniture manufacturing industry, printing industry, dry cleaning industry, electronic industry, synthetic leather, artificial leather and the like.
The electronics industry is one of the main industries for industrial organic waste gas emissions. The electronic waste gas is characterized by multiple emission types and complex components. In general, organic waste gas in the electronic industry process has the characteristics of large discharge flow and low concentration.
At present, methods adopted for treating organic waste gas at home and abroad mainly comprise an adsorption method, a direct combustion method, a catalytic combustion method, low-temperature plasma treatment and the like. According to the characteristics of organic waste gas in an electronic factory workshop, photocatalysis is an effective treatment method.
The principle of photocatalysis is to excite a compound semiconductor such as titanium dioxide by light, and to participate in oxidation-reduction reactions by electrons and holes generated by the compound semiconductor. When light with energy greater than or equal to the energy gap is irradiated onto the semiconductor nanoparticle, electrons in the valence band thereof will be excited to transit to the conduction band, leaving relatively stable holes in the valence band, thereby forming electron-hole pairs. Due to the large number of defects and dangling bonds in the nanomaterial, the defects and dangling bonds can trap electrons or holes and prevent recombination of the electrons and the holes. These trapped electrons and holes diffuse to the surface of the particles, respectively, creating a strong redox potential that ultimately degrades the organics into carbon dioxide and water by light energy.
Most of traditional photocatalysis systems enable organic waste gas to pass through a fixed catalyst bed layer under the irradiation of UV light so as to realize the purpose of degrading the organic waste gas. The fixed bed catalyst is difficult to realize high-efficiency carrier separation, and greatly limits the efficiency of the photocatalytic system.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model discloses a fluidized bed photocatalysis treatment device for organic waste gas in the electronic industry. The boiling bed photocatalysis reactor is adopted, so that the contact surface area of the organic waste gas and a photocatalysis system is greatly increased, the photocatalysis activity is improved, and the degradation speed and the degradation efficiency of the organic waste gas are further improved.
An ebullated bed photocatalytic treatment device for organic waste gas in the electronics industry, comprising: the device comprises a boiling bed photocatalytic reactor, a cyclone separator, a regenerator, a gas diversion regulating valve, an exhaust gas inlet fan, a separator inlet fan, a jet mixer, an air inlet nozzle, an observation window, a photocatalyst adding port, a UV lamp tube and a UV lamp tube cover.
The lower end of the fluidized bed photocatalytic reactor is provided with an air inlet, the bottom of the fluidized bed photocatalytic reactor is provided with four nozzles, the inside of the top end of the fluidized bed photocatalytic reactor is provided with an inclined baffle plate, and the outside of the top end is provided with an air outlet.
The top end of the inside of the photocatalytic reactor is provided with a plurality of gas baffle plates, the two sides of the gas baffle plates are arranged in a relative inclined manner, the inclination angle is 10-15 degrees, and the reserved gas channel is 1/3 of the inner diameter of the photocatalytic reactor.
An observation window is arranged on the side face of the photocatalytic reactor, and the observation window is sealed by quartz glass.
The outlet of the fluidized bed photocatalytic reactor is connected with a cyclone separator through a fan, the lower end of the cyclone separator is connected with a regenerator, and the outlet of the upper end of the cyclone separator is connected with a gas diversion regulating valve; and one outlet of the gas diversion regulating valve is connected with an exhaust gas inlet pipeline, and the other outlet of the gas diversion regulating valve externally discharges treated gas.
The inside of the photocatalytic reactor is respectively provided with a quartz glass UV lamp tube cover along the circumference and the central position of the inner wall, the upper end and the lower end of the quartz glass UV lamp tube cover are respectively fixed on the top end and the bottom shell of the photocatalytic reactor, and a UV lamp tube is longitudinally inserted and arranged in the quartz glass UV lamp tube cover.
The cyclone separator gas outlet is connected with a gas diversion regulating valve, a pipeline coming out of the gas diversion regulating valve is respectively connected with a discharge pipeline and a return pipeline, and the return pipeline is connected to a pipeline at the outlet of the exhaust gas inlet fan.
The outlet of the organic waste gas inlet fan is connected with one outlet of the gas diversion regulating valve through a pipeline, the converged pipeline is connected with the inlet of the jet mixer, the other inlet of the jet mixer is connected with the discharge port at the lower end of the regenerator, and the outlet of the jet mixer is connected to the organic waste gas inlet at the lower end of the photocatalytic reactor.
The inside ultraviolet irradiation device that is provided with of regenerator, ultraviolet lamp irradiation device includes UV lamp shade and UV fluorescent tube, and the regenerator upper end is equipped with the catalyst and supplements the entry.
Compared with other forms of photocatalytic reaction devices, the boiling bed photocatalytic treatment device for organic waste gas in the electronic industry greatly increases the contact area of the photocatalyst with the organic waste gas and ultraviolet light, greatly improves the photocatalytic efficiency, and simultaneously, the photocatalyst is circularly used in a system, and is simultaneously adsorbed, degraded and regenerated, thereby greatly improving the device efficiency, saving resources and reducing the cost, and being particularly suitable for treating low-concentration organic waste gas in the electronic industry.
Drawings
FIG. 1 is a flow chart of a fluidized bed photocatalytic reaction device
FIG. 2 is a front view of a photocatalytic reactor
FIG. 3 is a view of A-A screen shot
FIG. 4 is a B-B screenshot
FIG. 5 is a top view of a nozzle
-photocatalytic reactor, 2-cyclone, 3-regenerator, 4-cyclone inlet fan, 5-gas split regulating valve, 6-exhaust gas inlet fan, 7-organic exhaust gas, 8-exhaust gas, 9-gas inlet pipe, 10-reactor shell, 11-nozzle, 12-catalyst addition port, 13-observation window, 14-baffle, 15-ultraviolet light tube, 16-quartz glass cover, 17-mixed gas, 18-jet mixer.
Description of the embodiments
As shown in the figure, the fluidized bed photocatalysis treatment device for the organic waste gas in the electronic industry consists of a fluidized bed photocatalysis reactor, a cyclone separator, a regenerator, a gas split regulating valve, a waste gas inlet fan, a separator inlet fan, a jet flow mixer and an air inlet nozzle. The bottom of the fluidized bed photocatalytic reactor is provided with an air inlet nozzle, and the outlet of the top of the fluidized bed photocatalytic reactor is sequentially connected with an inlet fan of the cyclone separator and the cyclone separator; the top gas outlet of the cyclone separator is connected with a diversion regulating valve, the outlet of the diversion regulating valve is respectively connected with a discharge pipeline and a return pipeline, and the bottom solid outlet is connected with a jet mixer.
The reflux gas pipeline from the shunt regulating valve is connected with the exhaust gas inlet fan outlet of the machine, and is connected to the axial inlet of the jet mixer after meeting.
The outlet at the lower end of the cyclone separator is connected with the inlet of the regenerator, and the outlet at the lower end of the regenerator is connected with the radial inlet of the jet mixer.
The jet mixer outlet pipe is connected to the bottom inlet of the ebullated bed photocatalytic reactor.
After being pressurized by an inlet fan, the organic waste gas is returned with the return gas, enters the bottom of the photocatalytic reactor through jet mixed gas and regenerated catalyst, and upwards blows the photocatalyst in the photocatalytic reactor through a bottom nozzle to form a boiling state.
The inner edge and the central position of the photocatalytic reactor are respectively provided with UV lamp irradiation, and organic waste gas is fully contacted with boiling photocatalyst and is decomposed by photocatalytic reaction under the irradiation of ultraviolet light.
The gas-solid mixture moving upwards in the photocatalytic reactor is blocked by a baffle plate arranged at the top end of the reactor, a part of the gas-solid mixture is downwards, and the other part of the gas-solid mixture flows out from the top outlet through gas entrainment.
The gas-solid mixture flowing out from the top of the photocatalytic reactor is separated into gas and solid in the cyclone separator after passing through the fan, a gas outlet is connected with a gas diversion regulating valve, a part of the gas is directly discharged, and a part of the gas flows back to an inlet exhaust gas fan outlet.
The gas reflux ratio is automatically or manually adjusted according to the concentration and flow of the organic waste gas and the waste gas treatment result shown by a tail gas detector arranged at the discharge port.
The solid catalyst from the lower end of the cyclone separator is further decomposed by the regeneration light source arranged in the regenerator through the connected regenerator, so that the catalyst is regenerated.
The regenerated catalyst flows into the photocatalytic reactor through the nozzle which is re-entered into the photocatalytic reactor through the jet mixer.
Claims (6)
1. A fluidized bed photocatalysis treatment device for organic waste gas in electronic industry is characterized in that: the device comprises a fluidized bed photocatalytic reactor, a cyclone separator, a regenerator, a gas diversion regulating valve, an exhaust gas inlet fan, a separator inlet fan, a jet flow mixer, an air inlet nozzle, an observation window, a photocatalyst adding port, a UV lamp tube and a UV lamp tube cover.
2. The ebullated bed photocatalytic treatment device for organic waste gas in the electronic industry according to claim 1, characterized in that: the lower end of the fluidized bed photocatalytic reactor is provided with an air inlet, the bottom is provided with four nozzles, the inside of the top is provided with an inclined baffle plate, the outside of the top is provided with an air outlet, the side face of the fluidized bed photocatalytic reactor is provided with an observation window, and the observation window is sealed by quartz glass.
3. The ebullated bed photocatalytic treatment device for organic waste gas in the electronic industry according to claim 1, characterized in that: the inner peripheral edge inner wall and the central position of the fluidized bed photocatalytic reactor are respectively provided with a cylindrical quartz UV lamp tube cover, the upper section and the lower end of the quartz UV lamp tube cover are respectively fixed on the upper end shell and the lower end shell of the photocatalytic reactor, and a UV lamp tube is inserted into the quartz UV lamp cover.
4. The ebullated bed photocatalytic treatment device for organic waste gas in the electronic industry according to claim 1, characterized in that: the outlet of the fluidized bed photocatalytic reactor is connected with a cyclone separator through a fan, the lower end of the cyclone separator is connected with a regenerator, and the outlet of the upper end of the cyclone separator is connected with a gas diversion regulating valve; and one outlet of the gas diversion regulating valve is connected with an exhaust gas inlet pipeline, and the other outlet of the gas diversion regulating valve externally discharges treated gas.
5. The ebullated bed photocatalytic treatment device for organic waste gas in the electronic industry according to claim 1, characterized in that: the outlet of the organic waste gas inlet fan is connected with one outlet of the gas diversion regulating valve through a pipeline, the converged pipeline is connected with the inlet of the jet mixer, the other inlet of the jet mixer is connected with the discharge port at the lower end of the regenerator, and the outlet of the jet mixer is connected to the organic waste gas inlet at the lower end of the photocatalytic reactor.
6. The ebullated bed photocatalytic treatment device for organic waste gas in the electronic industry according to claim 1, characterized in that: the regenerator is internally provided with an ultraviolet irradiation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320839555.XU CN219559259U (en) | 2023-04-17 | 2023-04-17 | Ebullated bed photocatalysis treatment device of electronic industry organic waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320839555.XU CN219559259U (en) | 2023-04-17 | 2023-04-17 | Ebullated bed photocatalysis treatment device of electronic industry organic waste gas |
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| Publication Number | Publication Date |
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| CN219559259U true CN219559259U (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320839555.XU Active CN219559259U (en) | 2023-04-17 | 2023-04-17 | Ebullated bed photocatalysis treatment device of electronic industry organic waste gas |
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| CN (1) | CN219559259U (en) |
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2023
- 2023-04-17 CN CN202320839555.XU patent/CN219559259U/en active Active
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