Heat accumulating type catalytic combustion device for treatment of volatile organic chemicals (VOCs)

Abstract

The invention discloses a heat accumulating type catalytic combustion device for treatment of volatile organic chemicals (VOCs). The heat accumulating type catalytic combustion device comprises a supporting base, and the top surface of the supporting base is provided with a ga exchange device and a catalytic combustion unit. The pressure drop change in the catalytic combustion unit is monitored bya monitoring device in real time, the severity of carbon deposition in the surface area of metal mesh type catalysts is judged according to the pressure drop change, the greater the pressure drop is,the more serious the carbon deposition is, at the same time, the monitoring device can obtain kinetic energy under the action of pressure drop, the monitoring device can drive a transmission device to move, the catalytic combustion unit, a reversing device, an upper gas outlet device and a lower gas outlet device are controlled through the transmission device, the two metal mesh type catalysts can be put for use automatically and alternately, meanwhile metal mesh type catalysts with serious carbon deposition conditions can be automatically cleaned, the degree of automation is high, the laborcost is low, there is no need to terminate the waste gas treatment process of the VOCs, the waste gas treatment efficiency of the VOCs is high, and the practicability of the heat accumulating type catalytic combustion device for treatment of the VOCs is improved.

Description

technical field [0001] The invention relates to the field of VOCs treatment equipment, and more specifically, relates to a regenerative catalytic combustion device for VOCs treatment. Background technique [0002] VOCs is the English abbreviation of volatile organic compounds, which refers to any carbon compound that participates in atmospheric photochemical reactions except CO, CO2, H2CO3, metal carbides, metal carbonates and ammonium carbonate, which can pollute the environment, so VOCs Organic waste gas must be treated before it can be discharged. At present, the methods for dealing with VOCs organic waste gas mainly include adsorption method, membrane separation method, liquid absorption method, catalytic combustion method, photocatalytic oxidation treatment technology, and biological treatment technology. At low temperature, under the action of a catalyst, the combustible components in the exhaust gas are completely oxidized and decomposed, so that the gas is purified a...

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Problems solved by technology

[0003] The existing regenerative catalytic combustion device for VOCs treatment is composed of heat exchanger, combustion furnace, burner, metal mesh catalyst, fan, etc. During actual use, some VOCs will form hydrocarbons and paraffins if they are not completely burned. , colloid and other substances, these substances are attached to the surface of the metal mesh catalyst and burnt into colloidal carbon at high temperature to form carbon deposits, which gradually cover the metal mesh catalyst, resulting in a decrease in catalytic combustion rate and waste gas treatment efficiency. In order to regenerate the metal mesh catalyst, it is necessary to terminate the exhaust gas treatment process, that is, stop injecting exhaust gas and continue to blow fresh air to the metal mesh catalyst and heat it, so that the temperature of the metal mesh catalyst can be raised to 500°C and The reaction lasts for about five hours, thereby burning off the carbon deposits. However, the regeneration of the metal mesh catalyst is manually controlled, with low automation and high labor costs. At the same time, the waste gas treatment process will be terminated for a long time, reducing the waste gas. Therefore, it is urgent to design a regenerative catalytic combustion device for VOCs treatment

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