An exhaust gas catalytic combustion device

Abstract

The invention relates to a waste gas catalytic combustion device. The device comprises a filter, a catalytic combustor, a heat exchanger and a controller, wherein the catalytic combustor comprises a combustor outer shell, a metal heat accumulator and no less than two catalyst carriers, wherein the front end of the combustor outer shell is provided with an air inlet end, the air inlet end is provided with a combustion nozzle, the air inlet end communicates with an air inlet pipeline, and the rear end of the combustor outer shell is connected with the heat exchanger through an air return pipeline; the waste gas is discharged by an exhaust duct when passes through the heat exchanger, the metal heat accumulator is fixed at the front part of the combustor outer shell and is close to the air inlet end; and the catalyst carriers are arranged in the combustor outer shell in sequence, are located behind the metal heat accumulator, and a heater is arranged in the metal heat accumulator. According to the device, the temperature in the reaction process can be quickly and effectively adjusted, the catalytic carriers and the combustor outer shell are connected together through a connecting frame, so that the catalytic carriers can be replaced conveniently, and production and use are facilitated.

Description

Technical field [0001] The invention relates to the technical field of exhaust gas treatment, in particular to an exhaust gas catalytic combustion device. Background technique [0002] Catalytic combustion is a typical gas-solid phase catalytic reaction. It uses a catalyst to reduce the activation energy of the reaction and enables flameless combustion at a lower light-off temperature of 200 to 300°C. The oxidation of organic substances occurs on the surface of the solid catalyst. Simultaneous production of CO 2 And H 2 O, and release a lot of heat, because its oxidation reaction temperature is low, so it greatly suppresses the N in the air 2 Forms high temperature NOx. Moreover, due to the selective catalytic effect of the catalyst, it is possible to limit the oxidation process of nitrogen-containing compounds (RNH) in the fuel, so that most of them form molecular nitrogen (N 2 ). [0003] In the current catalytic combustor, the activation temperature is not easy to control, and ...

AI Technical Summary

Problems solved by technology

Moreover, due to the selective catalytic effect of the catalyst, it is possible to limit the oxidation process of nitrogen-containing compounds (RNH) in fuels, making most of them form molecular nitrogen (N 2 )

[0003] At present, the activation temperature of the catalytic burner is not easy to control, and the temperature in the reaction process cannot be effectively adjusted. The catalytic carrier and the burner shell are integrated, and the catalytic carrier cannot or is not easy to replace, which restricts practical application.

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