SAND CASTING EQUIPMENT.

Efficient exhaust gas treatment method, so that combustible substances in the exhaust gas can be oxidized and decomposed at a lower temperature

Catalytic combustion is an efficient waste gas treatment method. Its main principle is to use a catalyst to oxidize and decompose combustible substances in the waste gas at a lower temperature (usually 200-400c). This method has low energy consumption, simple operation, safety and high purification efficiency, and is very suitable for the application of chemical industry, painting, insulating materials, coating production and other industries.

The basic principle of catalytic combustion is as follows: catalytic combustion, with the help of a catalyst, organic waste gas at a low ignition temperature, flame less combustion, and oxidation decomposition into carbon dioxide and water, at the same time release a large amount of heat.

Catalytic combustion process can be divided into:

1. Preheating type.

The preheating type is the most basic process form of catalytic combustion. When the temperature of organic waste gas is below 100℃ and the concentration is low, the heat cannot be self-sufficient, so it needs to be heated in the preheating chamber before entering the reactor. Gas or electric heating is usually used to heat the exhaust gas to the ignition temperature required for the catalytic reaction. The purified combustion gas is heat exchanged with the untreated waste gas in the heat exchanger to recover part of the heat.

2. Self-thermal equilibrium.

Organic waste gas has a high temperature and a high content of organic matter, so it is usually only necessary to set an electric heater in the catalytic combustion reactor to be used when starting combustion. The heat generated by part of the purified gas can be recovered through the heat exchanger, and the thermal balance can be maintained under normal operation without adding heat.