Non-uniform type porous medium combustor processing organic waste gas

Abstract

The invention discloses a non-uniform type porous medium combustor processing organic waste gas. The non-uniform type porous medium combustor processing the organic waste gas is sequentially provided with a premixing chamber, a mixing chamber, a gas uniform distributor and a combustion chamber from bottom to top. An organic waste gas pipeline, an air pipeline and an oxygen pipeline are arranged in the pre-mixing chamber. The combustion chamber is filled with a porous medium of a non-uniform type honeycomb structure. The non-uniform type honeycomb structure comprises a lower layer, a middle layer and an upper layer. The middle layer is a combustion area. The pore diameter of the lower layer and the pore diameter of the upper layer are smaller that of the middle layer. From bottom to top, the pore diameter and the porosity of the middle layer are gradually increased. The intersection portion of the lower layer and the middle layer is provided with a heating wire igniter. The non-uniform type porous medium combustor processing the organic waste gas solves the problems that in the prior art, in the organic waste gas combustion processing process, combustion is not stable, the combustion temperature is high, and secondary pollutants such as nitric oxides are prone to generation.

Description

technical field [0001] The invention belongs to the technical field of purification equipment, and in particular relates to a non-uniform porous media burner for treating organic waste gas. Background technique [0002] Organic waste gas has the characteristics of large discharge, many types, strong toxicity, different properties, difficult to collect, and difficult to control. It is the precursor of PM2.5 and can form photochemical smog, causing air pollution and affecting human life and health. received widespread attention. At present, the commonly used methods for treating organic waste gas include adsorption method, combustion method and biological purification method; organic waste gas produced in chemical industry, printing, painting, pharmaceutical and other industries has large air volume, low concentration and no recovery value. Compared with other treatment methods, It is more economical and effective to use combustion method for treatment. [0003] For a long t...

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Problems solved by technology

[0003] For a long time, the combustion of gas has mainly been space combustion characterized by free flames. When organic waste gas is burned in this way, due to the large amount of organic waste gas, the combustion flame is long; in addition, the composition of organic waste gas is complex, resulting in the temperature near the flame surface Uneven distribution, the flame is easy to fluctuate, and the phenomenon of unstable combustion or even flameout occurs

[0004] The structure of the mixing chamber of the traditional porous media burner is simple, it cannot fully mix the air and organic waste gas, and it is prone to combustion instability; the porous media adopts double-layer porous media, which is suitable for burning single-component gases, while the components of organic waste gas are complex and the composition The component concentration fluctuates greatly, so it cannot burn stably in the traditional double-layer porous media device; and the combustion temperature is high, so it is easy to generate NO X secondary pollution

[0005] To sum up, there is still a lack of effective solutions to the problems of unstable combustion, high combustion temperature, and easy generation of secondary pollutants such as nitrogen oxides in the combustion process of organic waste gas in the prior art.

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