【Technology】 Activated Carbon Fiber Adsorption - Catalytic Combustion Device For The Treatment Of Organic Waste Gas Applications

A factory has two production lines, the main product is 200 L drums, the annual output of 1.3 million in the production process due to the use of toluene - containing paint, paint and drying process in the production of " triphenyl " emissions, polluting the surrounding of the environment; for the organic waste gas with a large amount of wind, low concentration characteristics of the plant in 2010 using activated carbon fiber adsorption - catalytic combustion of new devices to deal with " triphenyl " exhaust gas, air volume of 1800m3 / h.

1 process

Figure 1 is activated carbon fiber adsorption - catalytic combustion process block diagram, the entire system set adsorption, desorption, catalytic combustion in one.

In order to ensure the continuous operation of the system, the adsorber adopts a multi - unit shunt combined structure. In normal operation, there is only one unit in desorption state while the other units are in adsorption or cooling state. Organic waste gas is collected and then enters the n - 1 A unit of adsorption, the purified gas into the atmosphere. Before normal adsorption, the catalytic bed combustion chamber is first preheated to 300 ° C. After a certain period of time, when the activated carbon fibers in one unit are saturated, the desorption valve is opened and desorbed by hot air at 120 ° C. The desorbed high concentration organic waste gas into the catalytic bed combustion decomposition of CO2 and H2O, purified high - temperature gas through the tube heat exchanger to preheat the desorption of gas. A small part of the discharge through the chimney, the rest of the fresh air after the return hot air as desorption. This time stop electric heater preheating, and through the vent valve and make up the cooling fan to achieve the entire catalytic combustion system thermal balance. Each unit adsorption and desorption butterfly pneumatic valve by PLC industrial computer programmable controller according to set the time difference orderly switch, the entire electronic control device sub - manual and automatic two groups, and with automatic alarm system.

Activated carbon fiber non woven fabric is made of special ultra - fine fiber and coconut shell activated carbon through special pretreatment process. It has good adsorption performance and good anti - odor effect. It is widely used in the adsorption of various industrial waste gases, such as benzene, formaldehyde, ammonia or carbon disulfide, etc.

Most of the existing activated carbon fiber non woven fabrics are composed of an activated carbon fiber layer and a melt blown nonwoven wrapped on both sides of the activated carbon fiber layer. During production, activated carbon fiber nonwoven fabrics are mass - produced, and most of the activated carbon fiber nonwoven fabrics produced are produced. For a larger whole, special equipment is often required to cut the activated carbon fiber non woven fabric roll into a suitable size after the later use of the activated carbon fiber nonwoven fabric. The operation is complicated and the labor intensity of the operator is increased.