A method for treating self-sustained combustion of VOCs by catalytic ignition at room temperature

Abstract

The invention relates to a treatment method for the self-sustained combustion of VOCs catalyzed and ignited at room temperature in the technical field of VOCs-containing waste gas treatment. The treatment method includes the following steps: in the catalytic ignition stage, under normal temperature and pressure, when the temperature of the catalyst bed in the reactor equipped with the doped noble metal composite oxide catalyst is 30-45° C., the VOCs waste gas is removed. and H 2 Pass into the reactor, and then pass in air to make the VOCs exhaust gas catalytically ignite, enter the catalytic self-sustained combustion stage, and then stop feeding H 2 And adjust the feed flow of VOCs waste gas, and adjust the volume flow of incoming air, the reaction is developed into a self-sustained combustion reaction of VOCs waste gas, and the VOCs waste gas is completely oxidized into carbon dioxide and water and then discharged through the reactor outlet. Compared with the traditional VOCs catalytic combustion ignition technology, this method does not require external auxiliary heating, and does not require a new ignition device.

Description

technical field [0001] The invention relates to the technical field of VOCs-containing waste gas treatment, and further, relates to a treatment method for catalyzing the self-sustained combustion of VOCs at room temperature. Background technique [0002] Common VOCs purification technologies include condensation method, adsorption method, absorption method, catalytic method, biological method, etc. These methods are widely used. The catalytic method is to heat the VOCs to the light-off temperature (200-450°C) to realize the catalytic and non-catalytic combustion reactions of the VOCs to generate carbon dioxide and water. [0003] Patent CN106979526A provides a low-temperature plasma rapid ignition method for catalytic self-sustained combustion of VOCs at normal temperature and pressure. By placing a catalyst in the discharge area of ​​the plasma reactor, after applying a voltage, the gas discharge generates a low-temperature plasma. The waste gas to be treated containing a ...

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Problems solved by technology

[0004] However, petrochemical small-scale and pilot-scale test devices produce VOCs waste gas containing a certain amount of low unsaturated hydrocarbons. enough attention

So far, there is still a lack of catalytic combustion technology that is considered to have relatively high economic value for this type of VOCs exhaust gas at home and abroad.

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