Application of steam activated carbon in organic waste gas
1. Condensation recovery method: The organic waste gas is directly introduced into the condenser through adsorption, absorption, dissolution and separation, and valuable organic matter can be recovered. This method is suitable for the working conditions of high organic waste gas concentration, low temperature, and small air volume, and requires attachment Refrigeration equipment, mainly used in the pharmaceutical and chemical industries, less used by printing companies
2. Absorption method: Generally, physical absorption is used, that is, the exhaust gas is introduced into the absorption liquid for purification. After the absorption liquid is saturated, it is heated, analyzed, and condensed for recovery; this method is suitable for large-scale, low-temperature, and low-concentration exhaust gas, but heating is required Analysis and recovery device, the equipment is large and the investment is relatively high.
Generally, the activated carbon adsorption method is adopted: the exhaust gas is adsorbed by activated carbon. When the adsorption is saturated, the activated carbon is desorbed and regenerated. The exhaust gas is blown off and catalytically burned to convert it into harmless substances. The regenerated activated carbon is continued to be used. When the activated carbon is regenerated to a certain number of times, the adsorption capacity is significantly reduced, and the activated carbon needs to be regenerated or updated.
Activated carbon is currently the most used method to treat organic waste gas. It has good adsorption performance for benzene waste gas, but has poor adsorption for hydrocarbon waste gas. The main disadvantage is that the operating cost is high and it is not suitable for the environment with high humidity. However, as far as the current market applications are concerned, the use of activated carbon adsorption is the most commonly used. Activated carbon is mostly used: activated carbon particles and activated carbon fibers. The price of activated carbon particles is relatively cheap, but the effect is lower. In comparison, the price of activated carbon fibers is relatively higher and the effect is better.
2. Absorption method: Generally, physical absorption is used, that is, the exhaust gas is introduced into the absorption liquid for purification. After the absorption liquid is saturated, it is heated, analyzed, and condensed for recovery; this method is suitable for large-scale, low-temperature, and low-concentration exhaust gas, but heating is required Analysis and recovery device, the equipment is large and the investment is relatively high.
Generally, the activated carbon adsorption method is adopted: the exhaust gas is adsorbed by activated carbon. When the adsorption is saturated, the activated carbon is desorbed and regenerated. The exhaust gas is blown off and catalytically burned to convert it into harmless substances. The regenerated activated carbon is continued to be used. When the activated carbon is regenerated to a certain number of times, the adsorption capacity is significantly reduced, and the activated carbon needs to be regenerated or updated.
Activated carbon is currently the most used method to treat organic waste gas. It has good adsorption performance for benzene waste gas, but has poor adsorption for hydrocarbon waste gas. The main disadvantage is that the operating cost is high and it is not suitable for the environment with high humidity. However, as far as the current market applications are concerned, the use of activated carbon adsorption is the most commonly used. Activated carbon is mostly used: activated carbon particles and activated carbon fibers. The price of activated carbon particles is relatively cheap, but the effect is lower. In comparison, the price of activated carbon fibers is relatively higher and the effect is better.
