Air classifier grinder

Air classifier grinder

-- Sodium bicarbonate grinding machine for flue gas deacidification process

Hazardous waste treatment steel plant coke oven thermal power generation Municipal waste sludge incineration non-metallic mineral ceramics industry glass manufacturing

With the increasingly strict requirements of environmental regulations, the process of baking soda dry deacidification principle developed by Perman in combination with advanced technology in Europe and the United States has been more and more applied. Various pollutants in the flue gas were removed by dry adsorption with sodium bicarbonate as adsorbent. The purification effect can be compared with other known methods, such as spray adsorption using lime milk as adsorbent. Dry flue gas purification can not only be used in coal power plants, hazardous waste treatment, municipal waste or alternative fuel incineration plants, but also widely used in glass, cement, metallurgy and other industrial furnaces. The use of dry gas purification can economically remove the gas containing acidic substances, such as SO2, HCI, etc., to meet the national standard of flue gas emission standards.

The flue gas contains a large amount of acid gas, after a large number of data and experiments, only sodium bicarbonate (baking soda, NaHCO3) is small to a certain extent, its ability to produce the most efficient reaction with the acidic components in the flue gas. It removes acid pollutants from flue gas by chemisorption, and also removes some inorganic and organic trace substances by physical adsorption. In this process, sodium bicarbonate fine powder is directly injected into high temperature flue gas. At high temperatures, sodium bicarbonate decomposes to form sodium carbonate Na2CO3, H2O, and CO2.

Generally, the flue gas temperature is between 140 and 250 °C, and due to the high activity of the sodium bicarbonate adsorbent, a slightly excess sodium bicarbonate (stoichiometric factor between 1.1 and 1.3) is usually sufficient.