Catalytic combustion purification process and device

A catalytic combustion and purification process technology, applied in the direction of combustion methods, combustion types, incinerators, etc., can solve the problems of catalyst bed overheating, poor temperature control, etc., to prevent overheating, reduce load, and balance temperature Effect

Active Publication Date: 2017-12-22
FUZHOU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, what the present invention is to solve is the defect of poor temperature control and easy overheating of the catalyst bed in the existing catalytic combustion, and then provides a kind of flexible temperature control, the catalyst bed is not easy to overheat, and the catalytic combustion can be self-sustained. Catalytic combustion purification process and its device with high exhaust gas purification rate and high heat utilization rate

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  • Catalytic combustion purification process and device
  • Catalytic combustion purification process and device

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Embodiment 1

[0053] This embodiment provides a catalytic combustion purification process, such as figure 1 shown, including the following steps:

[0054] 1) The organic waste gas is taken out from the organic waste gas source, and the composition content of the organic waste gas is as follows: CH 4 : 35960mg / m 3 , Ethane equivalent converted from hydrocarbons above C2: 6179mg / m 3 , CO 2 12.0%, O 2 0.30%, the rest is N 2 , the flow rate of the organic waste gas is 2700m 3 / h, before the organic waste gas enters the mixing device, it is pre-desulfurized and equipped with a fire arresting device. The organic waste gas has its own pressure and can directly enter the mixing device without fan drainage;

[0055] Control the air volume adjustment capacity of the frequency conversion fan to 90% of the safe theoretical metering ratio. In order to facilitate the transformation of organic waste gas and control the appropriate excess of oxygen, under the condition of stable concentration, the ai...

Embodiment 2

[0060] This embodiment provides a catalytic combustion purification process, comprising the following steps:

[0061] 1) The organic waste gas is taken out from the organic waste gas source, and the composition content of the organic waste gas is as follows: CH 4 : 15000mg / m 3 , Ethane equivalent converted from hydrocarbons above C2: 5800mg / m 3 , CO 2 10.0%, O 2 0.50%, the rest is N 2 , before entering the mixing device, the organic waste gas is pre-desulfurized and equipped with a fire arresting device. The organic waste gas has its own pressure and can directly enter the mixing device without fan drainage;

[0062] Control the air volume adjustment capacity of the frequency conversion fan to be 50% of the safe theoretical metering ratio. In order to facilitate the transformation of organic waste gas and control the excess of oxygen, under the condition of stable concentration, the air volume introduced into the mixing device by the frequency conversion fan is 1000m 3 / h...

Embodiment 3

[0067] This embodiment provides a catalytic combustion purification process, comprising the following steps:

[0068] 1) Collect organic waste gas released during industrial production and methane gas released during oilfield exploitation to ensure that the total concentration of combustibles in the mixed organic waste gas composed of the two does not exceed 100,000mg / m 3 , after testing, the content of the components in the mixture of the two is as follows: CH 4 : 50000mg / m 3 , Ethane equivalent converted from hydrocarbons above C2: 8900mg / m 3 , CO 2 15.0%, O 2 0.60%, the rest is N 2 , before entering the mixing device, the organic waste gas is pre-desulfurized and equipped with a fire arresting device. The organic waste gas has its own pressure and can directly enter the mixing device without fan drainage;

[0069] Control the air volume adjustment capacity of the frequency conversion fan to be 150% of the safe theoretical metering ratio. In order to facilitate the conv...

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Abstract

The invention discloses a catalytic combustion purification process and device. According to the catalytic combustion purification process and device, firstly, organic waste gas and air and / or oxygen are mixed, and the mixing ratio of the organic waste gas and the air and / or the oxygen can be flexibly regulated and controlled according to the requirement for the subsequent catalytic combustion technology; it is guaranteed that the concentration of the organic waste gas in the mixed gas is within the explosion limit; more importantly, the subsequent catalytic combustion temperature is regulated and controlled, and the phenomenon of temperature runaway of catalytic combustion sections is eradicated; secondly, the mixed gas is divided into two parts, one part is used for catalytic combustion, and the remaining part conducts heat exchange with mixed gas at outlets of all the stages of the catalytic combustion sections. In this manner, the amount of the two parts can be regulated flexibly in time; the temperature of the mixed gas going in the next stage of catalytic combustion is maintained by using the remaining part; finally, catalytic combustion can be smoothly carried out, and the phenomenon of temperature runaway is prevented.

Description

technical field [0001] The invention belongs to the technical field of exhaust gas purification, and specifically relates to a catalytic combustion purification process and its device, which are especially suitable for low-to-medium-concentration organic waste gas released during industrial production, and organic waste gas released during oil field or coal seam mining. Purification treatment of low-concentration methane waste gas. Background technique [0002] In the production process of some chemical industries, organic waste gas mainly composed of organic components such as benzene, cyclohexane and xylene will be discharged; in the process of oil exploitation, oil fields mainly composed of methane and low-carbon chain hydrocarbons will be discharged Associated gas; in the process of coal seam mining, methane gas, mainly methane, will be emitted. The above-mentioned organic waste gas needs to be treated before being discharged to the outside world. At present, there are...

Claims

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Application Information

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IPC IPC(8): F23G7/07F23G5/44
CPCF23G5/44F23G7/07
Inventor 肖益鸿蔡国辉郑勇江莉龙林科钟富兰魏笑峰
Owner FUZHOU UNIVERSITY
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