Fine chemical VOCs solvent recovery complete unit, compression condensation membrane coupling process, manufacturer Luoyang Wo Hong petrochemical equipment, supporting tail gas treatment scheme

Fine chemical in the distillation, reactor pressure relief, vacuum desolvation, centrifugal discharge, tank breathing and other production links will continue to produce VOCs organic tail gas, waste gas composition is complex, often contains ethyl acetate, acetone, dichloromethane, n-hexane, alcohols and other organic solvents. Fine chemicals are mostly produced in intermittent batches, with pulsed exhaust emissions, large fluctuations in air volume and concentration, solvent droplets and water vapor entrained in the air flow, and some media are corrosive. The production area is mostly a Class A explosion-proof area. The traditional incineration process directly burns the recyclable solvent, which has high energy consumption, and the combustion of halogen-containing solvent will also generate toxic and corrosive by-products;activated charcoalThe adsorption process is susceptible to the impact of water vapor, the adsorption material fails quickly, and a large amount of dangerous solid waste is produced; the single condensation process is limited by the partial pressure of steam, and the recovery efficiency of low-concentration tail gas is insufficient, which can not take into account the solvent resource and the emission of tail gas.

The complete set of VOCs solvent recovery unit of fine chemical industry adopts compression condensing film coupling full physical process, no combustion, no chemical reaction, no secondary pollutants, and can be matched with a complete tail gas treatment scheme. The organic waste gas at each stain production point is collected centrally through a closed negative pressure pipe network and sent to a buffer pressure stabilizing unit to stabilize the pressure and gas volume fluctuations caused by intermittent exhaust, stabilize the intake condition of the main engine, and protect core precision components such as compressors, heat exchangers and membrane components. The exhaust gas enters the multi-stage pretreatment module to remove the solvent droplets, aerosols and free moisture inside the airflow layer by layer, reduce the probability of equipment corrosion, scaling and blockage failure, and extend the operating life of the whole unit.

The pre-treated exhaust gas is compressed and pressurized, the organic vapor partial pressure is raised, the solvent liquefaction phase change conditions are set up, and the multi-stage gradient condensation unit is sent to the multi-stage gradient condensation unit, relying on the difference in boiling point of different solvents to cool down, most of the organic components are directly liquefied and precipitated, and the main body of the solvent is recovered. The remaining low-concentration tail gas after condensation treatment enters the polymer membrane separation unit, relying on the permeability of the membrane material to selectively enrich the organic components, the purified tail gas meets the emission index, and the concentrated high-concentration organic gas flow is recycled to the front end of the equipment, further improving the comprehensive recovery efficiency of the mixed solvent. The recovered liquid solvent is treated by water separation, precision filtration and purification, and the quality meets the production reuse standard, which can be returned to the fine chemical production process for recycling, reducing the cost of solvent procurement and the amount of hazardous waste disposal.

The components in contact with the medium of the unit shall be made of suitable anti-corrosion materials according to the components of the waste gas solvent. The whole machine shall be designed and selected according to the chemical class A explosion-proof standard. All electrical components shall meet the explosion-proof level. The system is equipped with over-temperature, over-pressure, combustible gas detection interlock protection and emergency venting bypass to cope with sudden changes in working conditions and avoid on-site safety risks. Supporting PLC intelligent frequency conversion automatic control system, can follow the exhaust air volume, concentration dynamic adaptive adjustment of operating load, reduce ineffective energy consumption, support long-term unattended stable operation. The equipment can adopt skid-mounted integrated configuration. After the factory completes assembly, pressure detection and explosion-proof verification, the whole machine leaves the factory. The site only connects with the tail gas pipeline and public works interface. The construction workload is small and the transformation period is short. It is suitable for the upgrading and transformation of the tail gas system in the new fine chemical project and the old factory area.

LuoyangWohong PetrochemicalAs a manufacturer, the equipment can customize a complete set of tail gas treatment plan for the project site conditions, providing integrated services of condition survey, material balance calculation, complete equipment manufacturing, factory testing, on-site installation guidance, personnel operation training and operation and maintenance spare parts supply. The complete set of units is widely used in all kinds of fine chemical VOCs tail gas resource projects, in the recovery of organic solvents to achieve cost reduction and efficiency at the same time, stable to meet the requirements of environmental protection control.