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Device for photocatalytic degradation of organic waste gas and application method thereof

A technology of organic waste gas and photocatalysis, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of insufficient photocatalytic reaction and short residence time, so as to prolong residence time, realize purification treatment and promote decomposition efficiency effect

Pending Publication Date: 2020-05-22
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems of short residence time of exhaust gas passing through the photocatalytic box and insufficient photocatalytic reaction in the prior art photocatalytic degradation of organic waste gas, the present invention provides a catalyst for photocatalytic degradation of organic waste gas, a device and its application method

Method used

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  • Device for photocatalytic degradation of organic waste gas and application method thereof
  • Device for photocatalytic degradation of organic waste gas and application method thereof
  • Device for photocatalytic degradation of organic waste gas and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Such as figure 1 A device for photocatalytically degrading organic waste gas is shown, comprising a primary catalytic box 1 and a secondary catalytic box 7; the primary catalytic box 1 and the secondary catalytic box 7 are through-connected, and the The primary catalytic case 1 and the secondary catalytic case 7 are sealed structural parts;

[0066] One end of the primary catalytic box 1 is provided with a first air inlet 2 for inputting organic waste gas into the primary catalytic box 1;

[0067] The other end of the first-stage catalytic box 1 is provided with a first air outlet, which is used to make the organic waste gas passing through the first-stage catalytic box 1 exit the first-stage catalytic box 1 and enter the second-stage

[0068] Catalytic box: filter screens 5 are respectively arranged at both ends of the inner chamber of the primary catalytic box 1 .

[0069] One end of the secondary catalytic box 7 is provided with a second air inlet, and the first ai...

Embodiment 2

[0073] Utilize the device described in embodiment 1 to carry out photocatalytic degradation xylene gas experiment

[0074] The photocatalyst is made of titanium dioxide and silica sol dissolved in a mixed solution of water and ethanol (2:1) with a specific gravity of 4:1, stirred at a speed of 4000r / min for 60min, and then ultrasonically treated for 30min to form a uniform temperature solution , a photocatalyst supported on nickel foam.

[0075] The co-catalyst is made of manganese carbonate into a solution with a certain concentration, let the molecular sieve stand in the solution for 30 minutes, and after taking it out, calcinate it in a tube furnace at 400°C for 1 hour.

[0076] Step 1, photocatalyst and cocatalyst are placed in the hole of porous carrier plate 3, cocatalyst is placed in adsorption bed 8, wherein the weight ratio of the titanium dioxide of photocatalyst load and the manganese dioxide of cocatalyst load in porous carrier plate 3 holes are: 3:1, the loading ...

Embodiment 3

[0082] Utilize the device described in embodiment 1 to carry out photocatalytic degradation xylene gas experiment

[0083] The photocatalyst is made of titanium dioxide and silica sol dissolved in a mixed solution of water and ethanol (2:1) with a specific gravity of 1:1, stirred at a speed of 4000r / min for 60min, and then ultrasonically treated for 30min to form a uniform temperature solution , a photocatalyst supported on honeycomb aluminum.

[0084]The co-catalyst is obtained by making a solution with a certain concentration of manganese carbonate, letting the cordierite stand in the solution for 30 minutes, taking it out and calcining it in a tube furnace at 400°C for 1 hour.

[0085] Step 1, photocatalyst and cocatalyst are placed in the hole of porous carrier plate 3, cocatalyst is placed in adsorption bed 8, wherein the weight ratio of the titanium dioxide of photocatalyst load and the manganese dioxide of cocatalyst load in porous carrier plate 3 holes are: 3:1, the l...

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Abstract

The invention provides a device for photocatalytic degradation of organic waste gas and an application method of the device. The device comprises a first-stage catalytic box body and a second-stage catalytic box body, wherein at least two porous carrier plates containing photocatalysts are arranged in an inner cavity of the first-stage catalytic box body, and the at least two porous carrier platescontaining the photocatalysts are arranged in parallel in a staggered mode in the flowing direction of the organic waste gas, so that a zigzag flow channel can be formed; xenon lamps or ultraviolet lamps are arranged on two sides of the porous carrier plates; and at least one adsorption bed layer is arranged in the inner cavity of the second-stage catalytic box body along the flowing direction ofthe organic waste gas. The lamps are turned on, the organic waste gas is introduced into a first gas inlet of the first-stage catalytic box body, and the purified organic gas flows out from a secondgas outlet of the second-stage catalytic box body, so that photocatalytic degradation of the organic waste gas is completed. According to the device, the retention time of VOCs passing through the photocatalysis box bodies is effectively prolonged, conditions are created for photocatalysis reactions, and the degradation effect on VOCs is better and more sufficient.

Description

technical field [0001] The invention relates to the technical field of photocatalytic degradation of organic waste gas, in particular to a device for photocatalytic degradation of organic waste gas and an application method thereof. Background technique [0002] Volatile organic compounds in exhaust gas are also referred to as VOCs (Volatile Organic Compounds), most of which are toxic and seriously endanger human health; mainly include various hydrocarbons, triphenyls, alcohols, aldehydes, acids, ketones and amines Among them, benzene, xylene, and polycyclic aromatic hydrocarbons are listed as carcinogens by the World Health Organization. With the rapid development of modern industry, the quantity and types of VOCs discharged into the environment are increasing sharply, and VOCs have become one of the main pollutants in the atmosphere. In addition to causing direct air pollution, these organic waste gases will also generate secondary pollutants through a series of complex r...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/44B01D53/72B01D53/74
CPCB01D53/8687B01D53/44B01D53/007B01D53/8668B01D53/72B01D2259/804B01D2257/7027B01D2257/708B01D2258/02
Inventor 唐昶宇邵虹刘颖彘潘显明
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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