Compression Condensation Membrane Separation, High Concentration Exhaust Gas Treatment Optimization Process

Compressed condensate membrane separation, high concentrationwaste gas treatmentPreferred process

The key to the treatment of high concentration VOCs waste gas is recovery rather than destruction. Although the incineration method can meet the standards, the long-term cost of hundreds of thousands of gas costs plus the value of the burned solvent is unbearable;activated charcoalThe adsorption saturation speed is too fast under high concentration conditions, carbon exchange is frequent, and saturated carbon continues to generate costs according to hazardous waste disposal.

The compression-condensation membrane separation process combines the three technical gradients of compression, condensation and membrane separation to form a closed-circuit recovery system. High-concentration exhaust gas is first pressurized by the compressor to increase the partial pressure of organic matter and create conditions for condensation. The pressurized gas enters the multi-stage condensation unit, and the temperature gradually drops from normal temperature to minus fifteen to minus twenty-five degrees Celsius. Most of the organic matter is directly liquefied from the gaseous state to the liquid solvent. The condensed tail gas still contains a small amount of organic matter that cannot be liquefied. This part of the gas enters the membrane separation unit-using the difference in the permeation rate of organic molecules and air molecules in the membrane material, the organic matter preferentially penetrates the membrane layer to form concentrated gas, which is sent back to the compressor inlet for re-circulation treatment, and the air meets the discharge standard.

This process is suitable for medium and high concentration exhaust gas with inlet concentration of two to twenty grams per cubic meter, and has good separation effect on common solvents such as ketones, esters, hydrocarbons, halogenated hydrocarbons, alcohols, etc. The process is driven by electricity, does not consume natural gas, has no activated carbon consumables to replace, and does not produce hazardous waste. The overall recovery rate can reach more than 95%, and the comprehensive energy consumption is significantly reduced compared with the traditional cryogenic process.

High concentration of exhaust gas is not trouble, choose the right process is a stable source of income. Before selecting equipment, it is recommended to first conduct a process condition assessment and match the equipment specifications based on concentration, composition, and airflow rate.