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Zeolite Rotor Concentrator (RC) + Regenerative Catalytic Oxidizer (RCO)

Process flow chart:

 

Process description:

(1)Adsorption and concentration stage

The VOCs below 40 ℃ with a concentration less than 800ppm can be fed into the rotor at high flow rate, where they are adsorbed by the zeolite and the clean exhaust is discharged into the atmosphere by the variable frequency exhaust fan. The adsorber is a CTR that maximizes the contact area between the VOCs and the zeolite surface, which rotates continuously at a speed of 1 to 6 revolutions per hour. This system can achieve the VOCs removal rate of more than 95%.

 

(2)Desorption stage

In the rotor, the VOCs are concentrated into the saturated zeolite, which are then desorbed with the heat (about 200° C) from the heat exchanger. After desorption is completed, the zeolite is rotated to the cooling zone, where it is cooled to the room temperature, and then rotated to adsorption area.

 

 

(3)Catalytic oxidation stage

The VOCs flow of high concentration desorbed is conveyed by the desorption fan to the catalytic combustion furnace for catalytic cracking treatment, of which the products CO2 (g) and H2O (g) are discharged into the atmosphere. The high temperature airflow in the combustion chamber is led to the gas-air heat exchanger, where the heat is exchanged with the air at ambient temperature, so the air is heated to the temperature for desorption to save energy.

Technical features:

The VOCs are effectively absorbed in the zeolite when passing through the hydrophobic zeolite rotor concentrator, so the VOCs are removed. The clean air, of which the VOCs are absorbed by the zeolite, is discharged directly into the atmosphere through the chimney. The rotor keeps running continuously at a speed of 1-6 revolutions per hour, conveying the adsorbed VOCs to the desorption zone, where they are desorbed by a small amount of heating gas, and the zeolite after desorption is rotated to the adsorption zone to adsorb VOCs. The concentrated VOCs desorbed are fed to the incinerator for combustion, which are converted into carbon dioxide and water vapor emitted into the atmosphere.

Applications:

Petrochemicals, fine chemical industry, spraying and coating, packaging and printing, pharmaceutics and pesticides manufacturing, semiconductor and electronic products manufacture, wood-based panel and wooden furniture making, leather processing, enameled wire and footwear making, paint, ink, adhesive production and metal casting 

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