Environmental protection control in the pharmaceutical industry will continue to tighten in 2026. Most of the factories of bulk drugs, CDMO and pharmaceutical intermediates are produced in intermittent batches. A large amount of VOCs organic exhaust gas will be intermittently generated by reactor pressure relief, vacuum drying and vacuum pump exhaust. The exhaust gas contains high-value solvents such as dichloromethane, acetone and ethyl acetate. The air volume concentration fluctuates greatly. Some media contain chloride ions and are corrosive. The production workshop belongs to Class A explosion-proof area. When an enterprise chooses and purchases a solvent liquefaction recovery device, it cannot only compare the equipment quotation. It needs to take into account the recovery efficiency, explosion-proof safety and corrosion resistance. At the same time, it cannot interfere with the negative pressure production conditions of the reactor and vacuum pump. Selecting a reliable source manufacturer can greatly reduce the risk of later operation and maintenance failures.
Many pharmaceutical factories choose the traditional treatment process in the early stage, and many short boards are exposed after the actual operation.RTOThe incineration process directly destroys the organic solvent and loses the value of solvent recovery. The treatment of halogenated hydrocarbon waste gas such as dichloromethane will also generate corrosive by-products, resulting in high equipment investment and fuel consumption costs.activated charcoalAdsorption process in the face of intermittent fluctuations in pharmaceutical waste gas is easy to quickly saturated, the need for frequent replacement of activated carbon, resulting in a large number of hazardous waste, hazardous waste disposal costs increased year by year, only to achieve waste gas purification, can not complete the solvent liquefaction recovery. In order to improve the recovery rate of simple single-stage condensing equipment, deep refrigeration is required, the energy consumption of the whole machine remains high, and the exhaust gas is easy to exceed the standard in case of concentration impact. Single membrane equipment can only complete gas enrichment, can not directly produce liquid solvent, high load conditions under the membrane element loss speed.
Compression-condensation-membrane coupling solvent liquefaction recovery device, is the 2026 pharmaceutical plant resource recovery mainstream technical route, the whole set belongs to the physical recovery process, no open flame. Intermittent exhaust gas first enters the buffer pressure stabilizing unit to stabilize the concentration impact, and undergoes defoaming filtration, pre-cooling dehydration pretreatment to filter out medicine mist, impurities and water vapor, and protect the condenser and membrane components. Exhaust gas is compressed and pressurized to increase the partial pressure of solvent vapor, and most organic solvents are directly liquefied and recovered in multi-stage gradient condensation unit. The residual tail gas that has not been condensed completely is sent to the special membrane module for halogenated hydrocarbon resistance for enrichment and separation. The concentrated high-concentration organic gas is recirculated to the front end of the equipment for circulation treatment. The collected tail gas meets the standard for discharge. The collected liquid solvent is sent back to the production workshop for reuse after phase separation treatment.
The selection of VOCs solvent liquefaction recovery device in 2026 pharmaceutical factory should grasp several core points. The first refusal to directly apply standard models, pharmaceutical conditions vary greatly, manufacturers need to combine the actual air volume, solvent components, water content, intermittent production cycle to complete the material balance, calculate the amount of solvent recovery, energy consumption and return on investment cycle. The second treatment of halogenated hydrocarbon waste gas containing dichloromethane must be equipped with a special membrane resistant to halogenated hydrocarbons. Ordinary organic membranes will quickly swell and fail in contact with halogenated hydrocarbons. The third pretreatment system can not be cut, buffer, defoaming, filtration, pre-cooling dehydration, is the key to extend the service life of the whole set of equipment. The fourth focus is on back pressure control. The unreasonable design of the equipment flow channel will raise the front pressure and destroy the negative pressure environment of the reaction kettle and vacuum pump. The explosion-proof grade of the fifth equipment must match the Class A pharmaceutical workshop, and be equipped with a full set of safety interlocks for combustible gas, overpressure and overtemperature. Sixth, priority should be given to source manufacturers with landing experience in pharmaceutical projects, avoiding parts assembly middlemen, and ensuring the speed of spare parts supply and technical response.
LuoyangWohong PetrochemicalIt is the source supplier of VOCs solvent liquefaction recovery devices in pharmaceutical factories. It has its own standardized production workshop, focusing on intermittent and changeable waste gas working conditions in pharmaceuticals, and does not do simple parts assembly. Skid-mounted compression condensation-membrane coupling recovery unit for halogenated hydrocarbon corrosion, concentration impact, back pressure control to do special optimization, the whole explosion-proof grade ExdⅡ CT4, complete safety interlock. PLC frequency conversion automatic operation, can follow the exhaust gas load automatically adjust the power, adapt to batch intermittent production mode, the comprehensive recovery rate of solvent can reach 95-98%. The equipment is skid-mounted and integrated into the factory, the assembly and pressure test is completed inside the factory, and the on-site docking of the air duct and power supply can be put into production, resulting in almost no waste activated carbon and hazardous waste, thus reducing the long-term operation and maintenance cost of the factory.
The equipment is suitable for raw materials, pharmaceutical intermediates and CDMO pharmaceutical factories, and can handle mixed waste gases such as dichloromethane, acetone, ethyl acetate, butanone, ethanol, n-hexane, etc., covering waste gas sources such as reactor tail gas, vacuum drying tail gas, distillation non-condensable gas, vacuum pump exhaust, etc.
We can provide a full set of services such as on-site working condition survey, material balance calculation, return on investment calculation, process scheme customization, complete machine manufacturing, factory complete machine testing, on-site installation guidance and debugging, operator training, complete machine quality assurance, remote operation and maintenance, and spare parts supply. We have many sets of VOCs solvent liquefaction recovery projects in pharmaceutical factories, helping enterprises to achieve exhaust emission standards and realize organic solvent resource recovery.
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