Air Classifier Grinding Machine

Air Classifier Grinding Machine

  ——Leading sodium bicarbonate grinder for flue gas deacidification process

Hazardous waste treatment, steel plant coke oven, thermal power generation, municipal waste, sludge incineration, non-metallic ore, ceramic industry, glass manufacturing

With the increasingly stringent requirements of environmental protection laws and regulations, Perlman's process based on the principle of dry deacidification of baking soda developed in combination with advanced processes in Europe and the United States has been applied more and more. The dry method using sodium bicarbonate as the adsorbent adsorbs and removes various pollutants contained in the flue gas. Its purification effect can be compared with other known methods, such as the spray adsorption method using lime milk as the adsorbent. Dry flue gas purification can be used not only in coal power plants, hazardous waste treatment, municipal waste or alternative fuel incineration plants, but also in industrial furnaces in glass, cement, metallurgy and other industries. Dry flue gas purification can economically remove gases containing acidic substances, such as SO2, HCI, etc., and meet the national standard for flue gas emission.

     The flue gas contains a lot of acidic gas. After a lot of data and experiments, only sodium bicarbonate (baking soda, NaHCO3) can react with the acidic components in the flue gas to a certain degree. It removes acidic pollutants in the flue gas through chemical adsorption, and it can also remove some inorganic and organic trace substances through physical adsorption. This process sprays fine sodium bicarbonate powder directly into the high-temperature flue gas. At high temperature, sodium bicarbonate decomposes into 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 slight excess of sodium bicarbonate (stoichiometric factor between 1.1 and 1.3) is usually sufficient.