In the production process of the pharmaceutical and fine chemical industries, a large amount of VOCs organic waste gas is continuously generated from reactor synthesis, vacuum drying, distillation, and vacuum pump exhaust. The waste gas components are complex and often mixed with various high-value solvents such as dichloromethane, acetone, ethyl acetate, ethanol, and butanone. Most industries adopt intermittent batch production mode, with large fluctuations in exhaust gas volume and concentration. Some media are corrosive to chloride ions, and the workshop belongs to Class A explosion-proof area. Enterprises need to meet environmental emission standards while also hoping to recycle solvents to reduce raw material consumption. Therefore, choosing a suitable VOCs solvent recovery equipment manufacturer becomes particularly crucial.
Many companies tend to only compare equipment quotations during the selection stage, ignoring the manufacturer's process calculation capabilities, experience in halogenated hydrocarbon working conditions, non-standard customization, and complete on-site service capabilities. Some manufacturers in the market belong to the accessory assembly mode and lack experience in chemical working conditions. They simply copy universal models, which can easily lead to various faults such as failure to achieve the design recovery rate, rapid swelling and damage of membrane components, interference with vacuum pumps and reaction vessels due to high system back pressure, corrosion and leakage after equipment is put into operation. Tradition RTO Burningactivated charcoalThe adsorption process also has obvious shortcomings. Burning directly destroys valuable solvents, and conditions containing halogenated hydrocarbons can also generate secondary pollution; Activated carbon adsorption is prone to poisoning saturation, resulting in a large output of hazardous waste and high operating costs, making it difficult to balance treatment and solvent resource utilization.
The compression condensation film coupling process is currently the mainstream technology route for VOCs solvent recovery in the pharmaceutical and chemical industry. The entire process completes solvent recovery physically without open flames or high temperatures. The exhaust gas undergoes buffering and pressure stabilization, foam removal filtration, pre cooling and dehydration pretreatment to remove water vapor and material droplets. It is then compressed and pressurized to increase the solvent vapor partial pressure. Most of the organic solvents are directly liquefied and collected through multi-stage gradient condensation. The uncondensed exhaust gas is sent to a dedicated halogenated hydrocarbon resistant membrane module for enrichment and separation. The concentrated high concentration organic gas is circulated back to the front end for treatment. After treatment, the exhaust gas meets the emission standards, and the collected liquid solvents are reused in the production process after phase separation treatment.
There are several core evaluation dimensions for selecting manufacturers of pharmaceutical and chemical VOCs solvent recovery equipment. Manufacturers need to have the ability to conduct working condition surveys and material balance calculations, and be able to calculate the recovery amount, overall energy consumption, and investment return period based on the actual air volume, solvent ratio, water content, and intermittent production cycle of the enterprise, rather than directly applying standardized models. To treat halogenated hydrocarbon waste gas containing dichloromethane, it is necessary to configure specialized halogenated hydrocarbon resistant membrane components. Ordinary organic membranes that come into contact with halogenated hydrocarbons will quickly swell and fail. The complete preprocessing unit cannot be omitted. Buffer, foam removal, filtration, and pre cooling dehydration can protect the condenser and membrane components and extend the service life of the equipment. At the same time, it is necessary to confirm the overall explosion-proof configuration and back pressure control scheme of the equipment. Priority should be given to selecting source manufacturing factories with similar projects in the pharmaceutical and chemical industries, avoiding middlemen for OEM assembly, and ensuring the supply of spare parts and the speed of after-sales technical response.
LuoyangWohong PetrochemicalAs the source supplier of compressed condensing film coupled VOCs solvent recovery units, Equipment Co., Ltd. is rooted in the Luoxin Industrial Agglomeration Zone and has its own standardized production workshop. It focuses on the intermittent and variable waste gas conditions of pharmaceuticals and fine chemicals, and does not do simple component assembly. Special optimization is carried out for industry pain points such as halogenated hydrocarbon corrosion, batch production load fluctuations, Class A explosion-proof, and system back pressure control. The modular unit is assembled, pressure tested, and simulated in the factory. The explosion-proof level of the whole machine is Exd Ⅱ CT4, equipped with combustible gas, overpressure, and overtemperature safety interlocks, PLC variable frequency fully automatic operation, suitable for continuous and intermittent batch production, with a comprehensive solvent recovery rate of 95-98%, almost no hazardous waste of activated carbon is generated, effectively reducing the long-term operation and maintenance expenses of the enterprise.
The equipment is suitable for various working conditions and can process mixed waste gases such as dichloromethane, acetone, ethyl acetate, butanone, ethanol, n-hexane, etc. It is widely used in raw materials, pharmaceutical intermediates, CDMO factories, covering sources of waste gases such as reaction kettle exhaust, vacuum drying exhaust, distillation non condensable gas, and vacuum pump exhaust.
We can provide a complete set of services including on-site working condition survey, material balance calculation, investment return calculation, process scheme customization, complete machine manufacturing, factory testing, on-site installation guidance and debugging, operator training, complete machine quality assurance, remote operation and maintenance, and spare parts supply. We have multiple practical projects for the recovery of VOCs solvents in the pharmaceutical and chemical industries, helping enterprises achieve standard emissions of exhaust gas and solvent resource utilization, balancing environmental compliance with cost reduction and efficiency improvement.
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