Compressed Condensed Membrane Separation VOCs Recovery Technology

Compressed Condensed Membrane Separation VOCs Recovery Technology

Compression condensation membrane separation technology is a kind of physical separation as the core of VOCswaste gas treatmentMethod. The technology achieves efficient recovery of organic solvents and up-to-standard exhaust emissions through the gradient coordination of three units of compression, condensation and membrane separation.

Process flow: The exhaust gas first enters the compressor to pressurize, increase the partial pressure of organic matter, and create favorable conditions for subsequent condensation. The pressurized gas enters the multi-stage condensation unit, and most of the organic solvent is directly liquefied from the gaseous state to the liquid state by gradual cooling, and discharged from the collection tank. The uncondensed tail gas enters the membrane separation unit, and takes advantage of the difference in the permeation rate of organic molecules and air molecules in the membrane material-organic matter preferentially permeates the membrane layer to form concentrated gas, which is sent back to the compressor inlet to be mixed with new waste gas and then recycled again; the air component is intercepted and discharged up to the standard. The entire system forms a closed-loop cycle.

Technical features: The technology is driven by electricity, does not consume natural gas, and is not in operation.activated charcoalWait for consumables to be replaced; no hazardous waste is generated. The service life of the membrane module is long, and the daily maintenance is mainly to clean the heat exchanger and check the pressure difference of the membrane module. The process is normal temperature to low temperature operation, does not involve combustion, no open flame, and has good applicability in explosion-proof places. The equipment adopts skid-mounted design, and the assembly and debugging are completed before leaving the factory. The site can be put into operation only by connecting the power supply and gas circuit, with small floor area and short installation period. Equipped with PLC automatic control system, can automatically start and stop according to the situation of exhaust gas, no need for special personnel on duty.

Applicable conditions: This technology is suitable for waste gas with medium and high concentration (recommended above 1000mg/m³) and solvent with recovery value. For exhaust gas with low concentration or no recovery value, other technical routes may be more appropriate. Exhaust gas detection shall be completed before selection, and basic parameters such as concentration, component and air volume shall be defined.