Activated carbon RTO、 What is the difference between membrane condensation?

    activated charcoal、RTOWhat is the difference between membrane condensation?

Many companies often hear about activated carbon when choosing VOC treatment equipment RTO、 There are three processes of membrane condensation, but it is unclear what the differences are between them. Simply put, activated carbon is "absorbing", RTO is "burning", and membrane condensation is "collecting". The processing logic is completely different, and the suitable operating conditions are also completely different.

The principle of activated carbon is adsorption. When the exhaust gas passes through the activated carbon box, organic matter is captured by the micropores of the activated carbon, and clean air is discharged. Its advantages are simple equipment, low investment, and you can buy a set for one or two thousand yuan. But the adsorption capacity of activated carbon is limited, and it needs to be replaced when it is saturated. The replaced charcoal is hazardous waste, and the disposal cost is not low. Taking medium concentration exhaust gas as an example, it is normal to spend tens of thousands of yuan on carbon replacement and hazardous waste disposal every year. Moreover, activated carbon only transfers pollutants from the gas phase to the solid phase, without truly eliminating them. This process is suitable for situations with low air volume, low concentration, and occasional opening. If it runs continuously for a long time, the later cost will be the highest.

The principle of RTO is combustion. The exhaust gas is heated to over 800 degrees Celsius, and organic matter decomposes into carbon dioxide and water at high temperatures. Its advantages are high processing efficiency, not picky about the composition of exhaust gas, and suitable for continuous discharge with high air volume. But the investment in RTO equipment is large, starting at six to seven hundred thousand yuan per set. When treating low concentration waste gas, natural gas needs to be continuously burned, and the annual gas cost is several hundred thousand or even millions. The key is that RTO burned everything and couldn't retrieve any solvents from the exhaust gas. This process is suitable for scenarios with high air volume, low to medium concentration, no recycling value, and only requiring standard emissions.

The principle of membrane condensation is recovery. The exhaust gas is cooled down to minus ten degrees Celsius through multi-stage condensation, and the organic matter flows out for recovery from the gaseous state to the liquid state. A small amount of uncondensed exhaust gas passes through againgas separation membraneEnrich the residual organic matter and send it back to the condensation inlet for recycling treatment. Its advantage is that it only uses electricity for operation, does not burn gas, and does not have the trouble of frequently changing consumables. The purity of the recovered solvent is over 90%, which can be directly reused or sold for money. The equipment investment can usually be recovered within one to two years. The disadvantage is that it is not suitable for exhaust gases with too low concentration. This process is suitable for solvent waste gases with medium to high concentration and recycling value, such as chemical, pharmaceutical, printing, coating and other industries.

Understand the differences in a table. Activated carbon is a form of adsorption transfer with low investment but high operating costs in the later stages, resulting in no returns. RTO is high-temperature burning, with high investment and operating costs, and no returns. Membrane condensation is a condensation recovery method with moderate investment, low operating costs, and recovery benefits. The key to choosing a process depends on the concentration of your exhaust gas and whether it has recycling value.

LuoyangWohong PetrochemicalEquipment Co., Ltd. specializes in membrane condensation recovery technology and provides free operating condition analysis. The company is located in W2-1, Dongda Science and Technology Industrial Park, Luoxin Industrial Agglomeration Zone, Xin'an County, Luoyang City, with the website www.wohongshihua.com.