Air Classification Grinding Mill

Air Classification Grinding Mill

    - Sodium bicarbonate grinding mill for flue gas deacidification process

Hazardous waste treatment, steel plant coke ovens, thermal power, municipal waste, sludge incineration, non-metallic minerals, ceramics industry, glass manufacturing

     With increasingly stringent environmental regulations, the dry deacidification process using sodium bicarbonate developed by Peman, incorporating advanced European and American technology, is finding wider application. Using sodium bicarbonate as an adsorbent, the dry method removes various pollutants contained in flue gas. Its purification effect is comparable to other known methods, such as the spray adsorption method using lime milk. Dry flue gas purification can be used not only in coal-fired power plants, hazardous waste treatment, municipal waste or alternative fuel incineration plants, but also widely in industrial furnaces in the glass, cement, and metallurgy industries. The dry flue gas purification method can economically remove gases containing acidic substances, such as SO2 and HCl, meeting national flue gas emission standards.

     Flue gas contains a large amount of acidic gas. Through extensive data and experiments, it has been found that only when sodium bicarbonate (baking soda, NaHCO3) is ground fine enough can it react with the acidic components in the flue gas with maximum efficiency. It removes acidic pollutants from the flue gas through chemical adsorption, and can also physically adsorb some inorganic and organic trace substances. In this process, the sodium bicarbonate fine powder is sprayed directly into the high-temperature flue gas. At high temperature, sodium bicarbonate decomposes to form sodium carbonate Na2CO3, H2O and CO2.

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