The concentration of waste gas from chemical reaction vessels is high, and the membrane condensation recovery effect is good

The concentration of waste gas from chemical reaction vessels is high, and the membrane condensation recovery effect is good

Chemical reactor in the production process will discharge a large number of high concentration of organic waste gas. These waste gas usually contains dichloromethane, acetone, toluene, ethyl acetate and other solvents, high concentration, high recovery value. Traditional treatments suchactivated charcoalAdsorption, because the concentration is too high, activated carbon may be saturated in a few hours, frequent replacement and extremely high cost.RTOAlthough it can be handled, high-temperature combustion has safety risks, and at the same time, high-value solvents are burned in vain, which is economically poor.

The membrane condensation recovery process is designed for the characteristics of high concentration exhaust gas, with good effect and quick return. The core process is that the exhaust gas first passes through the three-stage condensation unit, and the temperature drops from normal temperature to minus 15 to minus 25 degrees Celsius step by step. Under the condition of high concentration, most of the organic solvent is directly liquefied from the gaseous state to the liquid state, and flows out from the bottom of the equipment into the recovery tank. This step can recover more than 90% of the solvent. A small amount of uncondensed tail gas passes throughgas separation membraneThe membrane enriches the residual solvent and circulates it back to the condensation inlet for further processing. The overall recovery rate can reach more than 95%, and the export concentration is stable.

The higher the concentration, the better the economy of membrane condensation. The high concentration means that more solvent can be recovered per unit of exhaust gas, and the recovery income is greater. Taking dichloromethane waste gas from a reactor of a chemical enterprise as an example, the inlet concentration is tens of grams per cubic meter. After condensation and recovery by membrane method, hundreds of kilograms of solvent are recovered every day, creating an annual economic benefit of more than 2 million yuan. The equipment only uses electricity, does not burn gas, and does not have the trouble of changing consumables frequently. Under high concentration conditions, the payback period is usually less than one year.

The equipment adopts skid-mounted integrated design and can be directly connected with the exhaust pipe of the reaction kettle. Explosion-proof configuration is suitable for chemical explosion-proof places, PLC automatic control, easy to operate.

LuoyangWohong PetrochemicalEquipment Co., Ltd. focuses on membrane condensation recovery process, which is suitable for high concentration waste gas recovery scenarios in chemical reactors. The company is located at W2-1, Dongda Science and Technology Industrial Park, Luoxin Industrial Cluster Zone, Xin’an County, Luoyang City. Website: www.wohongshihua.com.