Five different ways to treat waste gas from sandblasting rooms

There are many ways to deal with waste gas from sandblasting rooms. Here are five different ways to treat waste gas from sandblasting rooms.

Water spray:

This method is widely used in air pollution treatment. In addition, the spray method is also used in the spraying process. Its principle is to separate the gas with water to achieve the purpose of purification. This method has many advantages, the most important of which is abundant water resources and energy saving.

Condensation recovery method:

The exhaust gas is directly condensed or concentrated by adsorption, and the condensate is separated and recovered valuable organic matter. This method is used for waste gas treatment with high concentration, low temperature and small air volume. However, this method has large investment, high energy consumption, and large operating costs, so there is no special need, and this method is generally not used.

Absorption method:

It can be divided into chemical absorption and physical absorption, but the "triphenyl" waste gas has low chemical activity, and chemical absorption is generally not used. Physical absorption is to select a liquid absorbent with less volatility, which has a higher affinity with the absorbed component. After the absorption is saturated, it is heated to analyze and cool and then reused. This method is used for waste gas with low air volume, low temperature and low concentration. The device is complicated, the investment is large, the selection of the absorption liquid is difficult, and there is secondary pollution.

Direct combustion method:

Use the heat released by the combustion of auxiliary fuels such as gas or oil to heat the mixed gas to a certain temperature (700-800°C) and stay for a certain period of time to burn the combustible harmful gas. This method has simple process and low equipment investment, but it has high energy consumption and high operating cost.

Catalytic combustion method:

The exhaust gas is heated to 200-300°C and burned in a catalytic bed to achieve the purpose of purification. The method has low energy consumption, high purification rate, no secondary pollution, simple process and convenient operation. It is suitable for the treatment of high temperature and high concentration organic waste gas, but not suitable for the treatment of low concentration and large air volume organic waste gas.