Purification treatment method of high-concentration organic waste gas

A technology for organic waste gas and purification treatment, which is used in the purification treatment of low oxygen content organic waste gas, high organic concentration, and high concentration organic waste gas purification treatment. It can solve the problems of increasing the scale of heat exchange equipment and heating equipment, and reduce the scale , to avoid potential safety hazards, to prevent the effect of catalyst sintering

Active Publication Date: 2016-06-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, this method should also be properly diluted according to the concentration of organic waste gas, or if the oxygen in the waste

Method used

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  • Purification treatment method of high-concentration organic waste gas
  • Purification treatment method of high-concentration organic waste gas

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Embodiment 1

[0023] A chemical company has multiple propylene oxide storage tanks, equipped with nitrogen protection, and the average exhaust gas emission of the storage tanks is 200Nm 3 / h, the concentration of propylene oxide is 138000mg / m 3 , the oxygen concentration is less than 1%, and the rest is N 2 .

[0024] If conventional catalytic combustion process is used to treat the exhaust gas, in order to make the bed temperature rise not exceed 220°C, the concentration of propylene oxide shall not exceed 9000mg / m 3 , you need to dilute the exhaust gas more than 15 times. Therefore, the scale of the exhaust gas treatment device is 3000Nm 3 / h, the scale of catalytic combustion reactor, induced draft fan, heat exchanger, heater and other equipment in the treatment process is 3000Nm 3 / h, equipment investment and operating costs are high, the volume space velocity of the catalyst bed is 20000h -1 , need catalytic combustion catalyst 150L. The catalytic combustion reactor is filled wit...

Embodiment 2

[0029] A chemical company has exhaust gas from a benzene chemical plant, with a gas volume of about 500Nm 3 / h, the total hydrocarbon concentration is about 53000mg / m 3 , the main pollutants are benzene, toluene, aniline, cyclohexylamine, cyclohexane, etc., the oxygen concentration is less than 2%, and the rest is N 2 .

[0030] If conventional catalytic combustion process is used to treat the exhaust gas, in order to make the temperature rise of the bed layer not exceed 250°C, the combustion amount of organic matter shall not exceed 7500mg / m 3 (in terms of total hydrocarbon concentration), it is necessary to dilute the exhaust gas by more than 7 times, and the scale of the exhaust gas treatment device is 3500Nm 3 / h, the scale of catalytic combustion reactor, induced draft fan, heat exchanger, heater and other equipment in the treatment process is 3500Nm 3 / h, equipment investment and operating costs are high. The volume space velocity of the catalyst bed is 18000h -1 , ...

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Abstract

The invention discloses a purification treatment method of high-concentration organic waste gas. Organic waste gas is introduced into a catalytic combustion reactor after being subjected to heat exchange and preheating, isolated catalyst bed layers are arranged inside the reactor, each bed layer is provided with a waste gas inlet and a waste gas outlet, each waste gas inlet pipeline is provided with an oxygen supplying port and a pipeline mixer, and organic matter in waste gas is subjected to partial catalytic combustion reaction in each bed layer in a segmented oxygen supplying mode. In the waste gas flowing direction, the waste gas outlet of the former catalyst bed layer is connected with the waste gas inlet of the next catalyst bed layer through a heat energy recycling device, so that reaction heat released by catalytic combustion is fetched, and heat energy recovery is achieved. Potential safety hazards caused by detonation of combustible gas can be avoided, catalyst sintering caused by too high temperature of the catalyst bed layers is prevented, the scale and operation energy consumption of related devices for waste gas treatment are reduced, and the purification treatment method is especially suitable for purification treatment of organic waste gas with high organic matter concentration and low oxygen content in the petrochemical engineering industry.

Description

technical field [0001] The invention belongs to the field of exhaust gas purification, and relates to a purification treatment method for high-concentration organic waste gas, which is suitable for the purification treatment of high organic matter concentration and low oxygen content organic waste gas discharged in the production process of petrochemical industry. Background technique [0002] In the production process of some petrochemical industries, high-concentration organic waste gas will be emitted. The composition of this waste gas is mainly organic components, such as benzene, cyclohexane, xylene, ethylene oxide, etc. Hydrocarbon concentration ranges from thousands to hundreds of thousands mg / m 3 between. If this waste gas is discharged directly without treatment, it will not only violate the national environmental protection laws and regulations, but also the diffuse diffusion of these harmful substances in the installation area will seriously damage the health of ...

Claims

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Application Information

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IPC IPC(8): F23G7/07
CPCY02P20/10
Inventor 赵磊王新王筱喃刘忠生
Owner CHINA PETROLEUM & CHEM CORP
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