Printing and dyeing waste gas treatment manufacturers treatment method analysis

Printing and dyeing waste gas composition is mainly formaldehyde, polybenzene, aromatic hydrocarbons, etc., the current organic waste gas treatment methods have a lot of, Everest blue is a professional printing and dyeing waste gas treatment manufacturers, printing and dyeing waste gas commonly used methods of treatment, including activated carbon adsorption, ionic purification, combustion, UV photolysis purification, etc., the following with the Everest blue editorial to learn more about it.

Activated carbon adsorption method for printing and dyeing waste gas treatment
The main principle of activated carbon adsorption method is to use porous solid adsorbent (activated carbon, silica gel, molecular sieve, etc.) to deal with organic waste gas, which can fully adsorb the harmful components through the chemical bonding force or molecular gravity and adsorb them on the surface of the adsorbent, so as to achieve the purpose of purifying organic waste gas. The adsorption method is mainly applied to the purification of organic waste gas with large air volume, low concentration (≤800mg/m3), no particles, no viscous matter, and low concentration of organic waste gas at room temperature.
Activated carbon purification rate is high (activated carbon adsorption can reach more than 95%), practical and widespread, simple operation, low investment. After adsorption saturation need to replace the new activated carbon, replacement of activated carbon needs to spend, replace the saturated activated carbon is also needed to find professional staff for hazardous waste treatment, high operating costs.
Activated carbon adsorption box

Ion purification method of printing and dyeing waste gas treatment
Ion purification method uses the ionomer to generate internal characteristics rich in high chemical activity, the use of high-voltage discharge device in the discharge of high-energy electrons and ions, the separation of oxygen molecules in the air, the oxygen molecules absorb energy to produce free oxygen ions, organic waste gas pollutants and the free oxygen group reaction, and ultimately converted to CO2 and H2O and other substances, so as to achieve the purpose of purifying waste gas.
This method has a wide range of application, high purification efficiency, equipment covers an area of small features, suitable for other methods more difficult to deal with organic waste gas; but because of the use of high-voltage discharge device, in the water, dust, organic waste gas concentration of high concentration in the confined space is prone to explosion, there is a security risk, thus limiting the use of it.
Ion purification equipment

Combustion method for printing and dyeing waste gas treatment
Combustion method is only in the volatile organic compounds in high temperature and air under the premise of complete combustion, decomposition into CO2 and H2O. combustion method for all types of organic waste gas, can be divided into direct combustion, thermal combustion and catalytic combustion.
Emission concentration greater than 5000mg/m3 of high concentration of waste gas is generally used in direct combustion method, the method will be VOCs waste gas as fuel for combustion, combustion temperature is generally controlled at 1100 ℃, high efficiency, can reach 95% 99%.
Thermal combustion method is suitable for the treatment of concentration in 1000-5000 mg/m3 of waste gas, the use of thermal combustion method, the concentration of VOCs in the waste gas is lower, with the help of other fuels or combustion gases, thermal combustion requires a lower temperature than direct combustion, about 540-820 ℃. Combustion method to deal with VOCs exhaust gas treatment efficiency, but VOCs exhaust gas contains S, N and other elements, combustion of the exhaust gas generated by direct external emissions will lead to secondary pollution.

Through the thermal combustion or catalytic combustion method to deal with organic waste gas, its purification rate is relatively high, but its investment and operating costs are extremely high. It is difficult to achieve centralised collection because of the many and scattered points of exhaust gas emission. The combustion device needs many sets and requires a large area. Thermal combustion is more suitable for 24-hour continuous operation and higher concentration of waste gas conditions without chaos, not suitable for intermittent production line conditions. Catalytic combustion investment and operating costs are relatively low compared to thermal combustion, but the purification efficiency is also relatively low; but the precious metal catalyst is easily due to impurities in the exhaust gas (such as sulphide) and so on caused by poisoning failure, and replacement of the catalyst is very high; at the same time on the exhaust gas inlet prerequisites for the control of a very strict, otherwise it will result in the catalytic combustion chamber clogging and cause safety accidents.