At present, government management departments have gradually restricted inefficient treatment technologies and strengthened the promotion of efficient treatment technologies such as combustion. However, if low-concentration organic waste gas is directly treated by RTO combustion furnaces, it needs to consume a large amount of natural gas and other fuels, which will cause the operating cost of enterprises to be extremely high. Therefore, we need to concentrate the medium and low concentration organic waste gas into a higher concentration of waste gas and then enter the RTO waste gas treatment system for combustion.
Zeolite rotor concentration + RTO regenerative combustion technology is the mainstream technology for treating large air volume and low concentration waste gas in VOC organic waste gas treatment. In this way, it can not only save the energy consumption of the operation, but also reduce the specifications of the terminal treatment equipment, and the air volume of the organic waste gas will become very small after being concentrated by the zeolite runner, and the final concentration multiple needs to be designed according to the actual working conditions of the enterprise waste gas.
Zeolite runner concentration + RTO
Scope of application: Zeolite runner concentration + RTO waste gas treatment process is mainly used in low-concentration, continuous emission of waste gas treatment.
It can be applied to chemical, coating, pharmaceutical and pesticide manufacturing, electronic product manufacturing, furniture manufacturing industry, packaging and printing industry, painting, coating industry, feed fertilizer and other industries involving the use of organic solvents and organic waste emissions.
Zeolite runner concentration + RTO
Technical introduction: The zeolite runner concentration + RTO purification system is mainly composed of a three-stage dry filtration device, a zeolite rotor concentration adsorption device, an RTO, a fan, and a heat exchanger.
The pretreated exhaust gas enters the zeolite concentration runner + RTO regenerative combustion furnace, and the organic matter is adsorbed and concentrated by the porous adsorption of the zeolite molecular sieve, and the concentrated organic matter is oxidized and decomposed into harmless CO2 and H2O inorganic components by RTO high temperature (≥750 °C) to achieve the purpose of purifying the air.
Zeolite runner concentration + RTO
Technical principle: when the organic waste gas after pretreatment (removal of dust and particulate matter) passes through the concentration rotor, the organic matter will be adsorbed down in the adsorption area of the runner, and the waste gas (about 85% ~ 95% of the treated air volume) after adsorption purification is discharged into the atmosphere, and a small part of the exhaust gas (about 5%-15% of the treated air volume) cools the cooling zone of the runner, and is heated to a desorption temperature of 180-220 °C by the heat exchanger before entering the desorption zone. The organic matter in the desorption zone is detached from the adsorbent-zeolite into the heated gas stream, the runner is regenerated, and the high-concentration VOCs after desorption are sent to the RTO for high-temperature incineration.
After the reaction, the high-temperature exhaust gas enters the honeycomb ceramic heat storage body, where 95% of the heat is absorbed and "stored" by the heat storage body, and the temperature is reduced to close to the RTO inlet temperature. When the temperature of the heat storage body rises, the air flow direction is switched through the switching valve or rotary device, and the heat storage and heat release are carried out respectively, so as to realize the effective recovery and utilization of heat.
Zeolite runner concentration + RTO
Process flow: process (1): exhaust VOCs exhaust gas enters the zeolite runner from the exhaust pipe for VOCs adsorption;
Process (2): the gas adsorbed by the zeolite runner becomes clean gas, and part of the clean gas enters the chimney;
Process (3): Part of the net gas from the outlet of the zeolite runner enters the heat exchanger to absorb heat, and this part of the gas is called desorption air;
Process (4): The desorption air after endothermic heating enters the zeolite runner again to desorb VOCs;
Process (5): The desorption air carries a higher concentration of VOCs into the RTO, which is first preheated and heated by the heat accumulator, and then enters the furnace for oxidative decomposition;
Process (6): part of the high-temperature flue gas after combustion passes through the heat storage body and releases heat, and then enters the chimney;
Process (7): Part of the high-temperature flue gas enters the heat exchanger to release heat and heat the desorption air;
Process (8): The exothermic low-temperature flue gas enters the chimney;
Process (9): All clean gases entering the chimney are mixed and discharged into the atmosphere.
Zeolite runner concentration + RTO
Technological advantages
1. High adsorption and desorption efficiency≥95%, long life of zeolite, continuous desorption and treatment of pollutants, no pressure fluctuations.
2. Zeolite is non-flammable and has high safety. The pressure drop generated by the adsorption of VOCs by the zeolite runner is extremely low, which can greatly reduce the power consumption.
3. Convert the original high air volume and low concentration VOCs exhaust gas into low air volume and high concentration waste gas, and the concentration ratio reaches 5-20 times, which greatly reduces the specifications of post-treatment equipment and has low operating costs.
4. The overall system adopts modular design, which has small space requirements and provides continuous and unmanned control modes.
5. The system is automatically controlled, single-key start, simple to operate, and can be used with man-machine interface to monitor operation data.