Zeolite rotary wheel concentration catalytic combustion concentrates high air volume and low concentration exhaust gas into low air volume exhaust gas, thereby reducing equipment investment and operating costs and improving VOC exhaust gas treatment. When dealing with high air volume and low concentration exhaust gas combustion and recovery, if there is no zeolite wheel and combustion is carried out directly, the exhaust gas treatment equipment will not only be bulky, but also have high operating costs.
Basic principle and construction of zeolite wheel
The zeolite wheel concentration zone can be divided into a treatment zone and a cooling zone, and the concentration wheel operates continuously in each zone. After passing through the pre filter, VOC exhaust gas is processed in the concentration wheel device's treatment area. VOCs are adsorbed and removed by adsorbents in the processing area, and the purified air is discharged from the processing section of the concentration wheel. The VOCs in the exhaust gas adsorbed in the concentration wheel are desorbed and concentrated to a degree of 5-15 times after hot air treatment. The concentrated impeller is cooled in the cooling zone, and the air passing through the cooling zone is heated and used as air to achieve energy-saving effects.
The zeolite rotary adsorption concentration device adopts three continuous processes of adsorption desorption concentration incineration, mainly used for the treatment of exhaust gas; Especially suitable for high air volume and low concentration environments. The adsorption device is made of ceramic fibers as the substrate, forming a honeycomb shaped large disk wheel system, and the wheel surface is coated with hydrophobic zeolite as the adsorbent. The zeolite rotary adsorption and concentration device mainly consists of a waste gas pretreatment system, a molecular sieve rotary adsorption and concentration system, a desorption system, a cooling and drying system, and an automatic control system. After the wheel is turned, there is usually a post-processing system.
Working principle of zeolite rotary wheel concentration catalytic combustion:
The zeolite rotary wheel concentration adsorption device is a continuous temperature controlled adsorption and desorption program that uses adsorption concentration desorption to concentrate low concentration, high air volume exhaust gas into low air volume concentrated gas. Its device characteristics are suitable for processing exhaust gases with high air volume, low concentration, and multiple components.
After VOCs waste gas is concentrated by a hydrophobic zeolite wheel, it can be adsorbed onto the zeolite to achieve the purpose of purifying the waste gas. After zeolite adsorption, volatile compounds in the exhaust gas are removed, and the purified exhaust gas is directly discharged into the atmosphere through the chimney. The rotary wheel continues to rotate at a speed of 1-6 revolutions per hour, while transferring the adsorbed volatile compounds to the desorption zone. In the desorption zone, a small stream of heated gas is used to desorb volatile compounds. The adsorbed substances are desorbed in this zone by the rotating wheel, and the substances adsorbed on the rotating wheel are separated and desorbed. The desorbed zeolite rotating wheel rotates again to the adsorption zone through the cooling zone and continues to adsorb volatile gases. The exhaust gas generated during the desorption process is sent to an incinerator for combustion and conversion into carbon dioxide and water vapor, which are then emitted into the atmosphere.