1, absorption treatment: this method generally adopts physical absorption technology, as the name implies, the waste gas is purified by introducing absorption liquid, and after the absorption liquid is saturated, it is heated, analyzed and condensed for recovery. This method is suitable for waste gas with large air volume, low temperature and low concentration, but it needs to be equipped with a heating analytical recovery device, which has a large volume and high investment.
2. Catalytic combustion treatment: This method mainly heats the waste gas and converts it into harmless and odorless carbon dioxide and water through catalytic combustion. The invention has the advantages of low light-off temperature, energy saving, high purification rate, convenient operation, small occupied area and large investment, and is suitable for high-temperature or high-concentration organic waste gas.
3. Thermal combustion treatment: Its principle is to oxidize combustible waste gas into corresponding oxides and water at high temperature, so as to purify waste gas and recover the heat released in the process of waste gas decomposition. The decomposition efficiency of waste gas reaches over 99%, and the heat recovery efficiency reaches over 95%.
4. Electrochemical oxidation method: The electrochemical oxidation technology adopts a chemical battery with a patented membrane and AgNO3-HNO3 solution, which is oxidized at 50 100℃ and normal pressure. At the anode, VOCs malodorous gas is converted into CO2 and H2O；; Nitrite is produced at the cathode and can be recycled after treatment. The typical characteristics of this method are: the removal rate of VOCs malodorous substances is high, which can reach more than 99%, but the operating cost is also high.