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Organic exhaust gas degradation method and device

An organic waste gas and photocatalyst technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of death, microorganisms are susceptible to poisoning, and cannot completely degrade organic matter, and achieve the effect of improving the degradation effect.

Inactive Publication Date: 2016-09-28
ZHEJIANG QICAI ECO TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, biological method, solvent absorption method, and activated carbon adsorption method have low purification efficiency and incomplete treatment of organic matter; incineration method is prone to secondary pollution; low-temperature plasma method has certain safety; photocatalytic oxidation method destroys the molecular bonds of organic matter, but cannot be completely degraded organic matter
[0004] The utility model patent document with the publication number CN202778234U discloses a combined organic waste gas treatment device. The paper proposes to use the combined method of "photocatalytic oxidation + biological spray filter" to degrade organic waste gas, which solves the problem of incomplete treatment of organic waste gas by physical and chemical methods. However, the problem of the susceptibility of microorganisms to poisoning has not been completely solved, and the contact between microorganisms and gases is not sufficient, and microorganisms still need to be domesticated, and are prone to mutation and death

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  • Organic exhaust gas degradation method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A mixed organic waste gas containing toluene, xylene, ethyl acetate, ethers, and ketones, the concentration of non-methane total hydrocarbons at the inlet is 2000mg / m 3, the wind volume is about 24000m 3 / h.

[0039] (1) Photocatalysis: Exhaust gas enters the photocatalytic oxidation reactor 2 through the induced draft fan for photocatalytic oxidation treatment. The photocatalyst carrier is made of alumina, and the active component is made of titanium dioxide. The coating density of the catalyst on the screen is 0.5kg / m 2 .

[0040] (2) Catalytic oxidation washing: the gas obtained after the step (1) treatment enters the catalytic oxidation washing tower 3, and the catalyst in the catalytic oxidation washing tower 3 takes activated carbon as a carrier, and takes iron oxide as an active component, and the loading of iron oxide in the catalyst The amount is 1%, and the mass fraction of 1% H is used for washing 2 o 2 The aqueous solution is used as the oxidant, and th...

Embodiment 2

[0044] A mixed organic waste gas containing xylene, butyl acetate, ethyl acetate, and methyl isobutyl ketone, the concentration of non-methane total hydrocarbons at the inlet is 4000mg / m 3 , the wind volume is about 35000m 3 / h.

[0045] (1) Photocatalysis: The organic waste gas enters the photocatalytic oxidation reactor 2 through the induced draft fan for photocatalytic oxidation treatment. The photocatalyst carrier adopts alumina, the active component adopts cobalt oxide, and the loading capacity of cobalt oxide in the photocatalyst is 1 %.

[0046] (2) Catalytic washing: the gas obtained after the step (1) is processed enters the catalytic oxidation scrubber 3, and in the catalytic oxidation scrubber 3, the catalyzer takes activated carbon as a carrier, and takes copper oxide as an active component, and the loading capacity of copper oxide in the catalyzer is 1%, the sodium hypochlorite aqueous solution with a mass fraction of 0.5% is used as the washing oxidant, and the...

Embodiment 3

[0050] A certain organic waste gas containing acrylonitrile and chloropropene, the concentration of non-methane total hydrocarbons at the inlet is 1000mg / m 3 , the wind volume is about 10000m 3 / h.

[0051] (1) Photocatalysis: Exhaust gas enters the photocatalytic oxidation reactor 2 through the induced draft fan for photocatalytic oxidation treatment. The photocatalyst carrier adopts molecular sieve, and the active component adopts titanium dioxide. The coating density on the screen is 1kg / m 2 .

[0052] (2) Catalytic oxidation washing: the gas obtained after the step (1) treatment enters the catalytic oxidation washing tower 3, and the catalyst in the catalytic oxidation washing tower 3 takes activated carbon as a carrier, and takes nickel oxide as an active component, and the loading of nickel oxide in the catalyst The amount is 0.5%, and the mass fraction of washing is 0.5% H 2 o 2 The aqueous solution is used as the oxidant, and the spray liquid-gas ratio of the oxid...

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Abstract

The invention discloses an organic exhaust gas degradation method and device. The organic exhaust gas degradation method comprises the steps that particles and oil mist in exhaust gas are removed, and then the exhaust gas is delivered into a photocatalytic oxidation reactor; a catalyst is exposed to ultraviolet irradiation, the exhaust gas is directly subjected to splitting decomposition on the surface of the catalyst, meanwhile hydroxyl radicals and ozone are produced, and organic exhaust gas is further oxidized; non-decomposed exhaust gas is delivered into a catalytic oxidation scrubbing tower and is further subjected to oxidative decomposition under the combined action of the catalyst and an oxidizing agent. The device comprises a gas inlet pipeline, a gas outlet pipeline, a pretreatment tower, the photocatalytic oxidation reactor and the catalytic oxidation scrubbing tower. The organic exhaust gas degradation method thoroughly decomposes organic pollutants under the combined action of photocatalytic oxidation and catalytic oxidation scrubbing and does not produce secondary pollution.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a method and device for degrading organic waste gas. Background technique [0002] A large number of organic solvents are used in the production process of chemical, pharmaceutical, printing and dyeing industries, such as formaldehyde, benzene series, acetone, ethyl acetate, methanol, halogenated hydrocarbons and other organic solvents. These organic solvents generate volatility during use. Organic waste gas, and organic waste gas is usually toxic, flammable and explosive, easily soluble in organic solvents, insoluble in water, and difficult to treat. [0003] At present, the treatment methods of organic waste gas mainly include solvent absorption method, activated carbon adsorption method, combustion method, biological method, low temperature plasma method, photocatalytic method and so on. Among them, biological method, solvent absorption method, and activated carbo...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D47/02B01D53/72B01D53/70B01D53/54B01D53/48
CPCB01D53/86B01D47/02B01D53/48B01D53/485B01D53/54B01D53/70B01D53/72B01D53/8603B01D53/8606B01D53/8621B01D53/8662B01D53/8668B01D53/8681B01D2251/10B01D2251/104B01D2251/106B01D2251/108B01D2255/10B01D2255/20707B01D2255/20738B01D2255/20746B01D2255/20753B01D2255/20761B01D2255/20769B01D2255/802B01D2259/804
Inventor 王培城王栋陶旭东毛兵吕杨楼银川
Owner ZHEJIANG QICAI ECO TECH CO LTD
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