Regenerative Oxidation Combustion System

Zeolite runner adsorption concentration + regenerative oxidation combustion system

Process flow description
Exhaust gas collection: After the exhaust gas from the paint spraying room is collected, it is collected by means of a collecting pipe.
Dehumidification of exhaust gas: Since the exhaust gas from spray painting passes through the wet paint de-mist equipment, the relative humidity of the exhaust gas is relatively large. It may affect the adsorption efficiency of the zeolite concentration runner. Therefore, the plan is designed to take a high-temperature hot gas from the RTO and introduce the furnace gas into the gas. The exhaust gas is heated and humidified to ensure that the temperature and humidity of the exhaust gas meet the requirements for entering the zeolite runner. After the exhaust gas is filtered and the relative humidity is reduced, it enters the zeolite rotor for adsorption.
Adsorption gas process: The exhaust gas is transported to the air filter through the pipe induced draft fan, and the paint mist, particulate matter and other substances in the exhaust gas are filtered. After filtering, it is sent to the zeolite concentration runner. When the exhaust gas flows through the zeolite runner (yellow part) ), in which the VOC gas molecules enter the molecular sieve pores, and the rest of the gas is removed, and this part of the gas is purified, and the purified gas is then discharged to the atmosphere through the induced draft fan.
Desorption gas process: The VOC gas molecules adsorbed by the molecular sieve are sent to the regeneration zone (desorption zone) with the rotation of the runner, and the reverse desorption is carried out by the high temperature gas (180-200 ℃). This part of the high temperature gas is only 1/3-1/20 of the intake air volume, the desorbed gas becomes a high-concentration and low-air volume gas, which is sent to the rotary RTO for incineration by the induced draft fan, and becomes harmless CO2 and H2O and is discharged with the chimney; The hot air used for desorption is derived from a small fraction of the heat from the RTO.
Cooling gas flow: The concentration runner has strict requirements on the adsorption temperature, which cannot be higher than 40 °C. After being heated by the high-temperature desorption air in the desorption zone, the temperature of the concentration runner is higher, which is not conducive to the next step of adsorption and concentration. Therefore, this system is set There is a cooling zone, and the exhaust gas with lower temperature is used for cooling to ensure the adsorption efficiency of the concentration runner.
With the continuous rotation of the runner, the adsorption, desorption and cooling cycle are carried out, and the exhaust gas treatment continues to operate stably.
Regenerative combustion process: The high-concentration organic waste gas from the desorption passes through the high temperature zone of the RTO oxidation chamber to oxidize and decompose the VOC components in the waste gas into harmless CO2 and H2O, and the oxidized high-temperature gas heat is "stored" by the ceramic regenerator. It is used to preheat the newly entering organic waste gas, thereby saving fuel and reducing operating costs.
This system mainly uses the heat storage mechanism of the ceramic regenerator and the continuous switching valve of the regenerator, so that the system repeats the process of heating the exhaust gas, burning and decomposing the exhaust gas, and storing the heat to reduce the temperature of the flue gas. This system can completely decompose VOC and save a lot of fuel costs. When the exhaust gas reaches a certain VOC concentration, supplementary heat energy is completely unnecessary.