Commonly used methods are cooling method, adsorption method, combustion method, and the like.
Cooling method refers to the use of temperature difference to cool the exhaust gas into waste liquid. The purification rate of this method can only reach 45% at most, and it takes a lot of energy to reach the temperature difference. In addition, the tail gas component emitted by the Enameled Wire production is disorderly, and the economic value of the recovered liquid is low. Can no longer be used.
The adsorption method uses an adsorbent such as a surface active material such as activated carbon to adsorb organic waste gas. At the beginning, the adsorbent can absorb a lot of exhaust gas, but when it reaches the maximum adsorption capacity of the adsorbent, the effect will be lost. After the adsorbent is activated from the head, the adsorption can be reduced. After the cycle, the adsorption can be lost, the operation cost is high, and after the failure. Adsorbents such as activated carbon are hazardous and difficult to handle.
The combustion method uses the flammability of the organic waste gas, decomposes the exhaust gas into carbon dioxide and water, and then discharges the purified gas harmlessly. The combustion method has a thermal combustion method and a catalytic combustion method. The purification rate of the thermal combustion method is 48% to 50%, and the purification rate of the catalytic combustion method is 95% to 99%.
Catalytic combustion method installation, construction, capital consumption, energy consumption, processing costs are lower than the thermal combustion method, and has been continuously improved, has become the most economical and useful way to deal with VOCs in the enameled wire industry, and it is being implemented agilely and in many choices in the enameled wire industry.