彩涂板生产VOCs废气治理方法

在彩涂板生产线的废气处理方面，客户往往采用多种方法，如直接燃烧法、液体吸收法、蜂窝活性炭吸附法、光催化氧化法等VOCs气体在线监测设备。

In terms of waste gas treatment of color coating line, customers often use many methods, such as direct combustion method, liquid absorption method, honeycomb activated carbon adsorption method, photocatalytic oxidation method, etc. VOCs gas on-line monitoring equipment

The photocatalytic oxidation method is widely used because it does not produce secondary pollution, but if the exhaust gas concentration is relatively high, the treatment efficiency of this equipment is not high, generally between 50 ~ 80%; The purification efficiency of liquid absorption method also depends on the concentration of waste gas. Generally, the treatment efficiency is between 60 ~ 70%. This method has the problem of secondary pollution.
For the waste gas treatment during production and processing of color coating line and spraying, adsorption desorption catalytic combustion equipment is selected for treatment according to the actual on-site design of many customers. This method can deal with the working environment with high concentration, large air volume and continuous painting. When the designed air volume is met, the treatment efficiency is between 90 ~ 97%.
The treatment process principle is: the collected waste gas is first introduced into the front filter box, which is equipped with activated carbon fiber. A large number of microporous structures of activated carbon fiber can quickly capture waste gas molecules, adsorb most of the waste gas, and then enter the adsorption desorption catalytic combustion equipment for secondary adsorption through honeycomb activated carbon with high iodine value, and the adsorbed waste gas is introduced into the catalytic area, The temperature of the catalytic zone is between 260 ~ 320, which can fully decompose the waste gas into harmless components such as carbon dioxide and water vapor, and then be introduced into the 15m chimney by centrifugal fan for emission.
In addition to the process described above, concentrated zeolite runner equipment can also be selected for VOCs color coating line waste gas treatment. It is mainly necessary to detect the waste gas concentration, determine the air volume and determine the model of waste gas treatment equipment according to the actual situation of customers on site. Only in this way can the formulated scheme be effective and ensure that the emission can reach the standard after long-term use.