The technical renovation projects for old pharmaceutical and chemical workshops often face practical challenges such as tight space, limited civil engineering conditions, and tight schedules. At the same time, the exhaust gas components are complex, with multiple components such as dichloromethane, acetone, ethyl acetate, butanone, and ethanol coexisting. The production is intermittent batch emission, with large fluctuations in air volume and concentration. The halogenated hydrocarbon medium is corrosive, and the workshop belongs to Class A explosion-proof environment. The skid-mounted solvent liquefaction and recovery equipment integrates the entire process unit into a single base, with assembly and commissioning completed within the factory. On-site, only the air duct and power supply need to be connected for production. It covers a small area and can be deployed quickly. It can not only achieve up-to-standard exhaust gas emissions but also liquefy and recover high-value organic solvents, making it highly suitable for multi-component exhaust gas treatment scenarios in active pharmaceutical ingredients, pharmaceutical intermediates, and CDMO enterprises. Many skid-mounted equipment on the market are simply assembled from hardware without process matching for pharmaceutical multi-component exhaust gas. After commissioning, various failures such as membrane corrosion, insufficient recovery rate, and back pressure disturbance of the reaction kettle negative pressure occur. The process design and project experience of the source manufacturer are particularly crucial.
Traditional governance solutions face significant shortcomings in dealing with multi-component pharmaceutical exhaust gases and the renovation of old factories. RTO incineration equipment requires substantial civil construction, occupies a large area, and has a long construction period. It directly burns valuable solvents and generates corrosive substances when treating halogenated hydrocarbon exhaust gases, posing safety hazards due to open flames. Furthermore, it only provides treatment input without generating recycling benefits. Activated carbon adsorption equipment has a low initial procurement cost, but the filter material is prone to rapid saturation under intermittent fluctuating conditions, necessitating frequent replacement, which generates a large amount of hazardous waste. The disposal cost of hazardous waste continues to rise, making it impossible to achieve solvent liquefaction and recovery. Split condensation-membrane equipment requires substantial on-site welding, assembly, and commissioning work, has a long technical renovation period, and demands high on-site infrastructure conditions. Some skid-mounted assembly equipment only integrates hardware, lacks the ability to balance multi-component materials, and the membrane components are not resistant to corrosion from halogenated hydrocarbons. The back pressure control is not in place, interfering with the production of reaction vessels and vacuum pumps under negative pressure.
The skid-mounted compression condensation-membrane coupling liquefaction recovery unit is a fully physical process, without open flames, and is specially adapted for multi-component mixed waste gases from pharmaceuticals. The compressor, multi-stage condenser, halogenated hydrocarbon-resistant membrane components, pretreatment unit, and explosion-proof electronic control system are all integrated on the skid base. The waste gas first enters the buffer and pressure stabilization unit to stabilize the impact of air volume concentration. After demisting filtration, precooling, dehydration, and pretreatment, the drug mist, impurities, and water vapor are removed to protect the core components at the back end. The waste gas is compressed and pressurized to increase the partial pressure of solvent vapor, and various ketones, esters, and halogenated hydrocarbon solvents are directly liquefied and recovered in the multi-stage gradient condensation unit. The residual tail gas that has not been fully condensed is sent to the halogenated hydrocarbon-resistant dedicated membrane components for enrichment and separation. The concentrated high-concentration organic gas is recycled back to the front end of the equipment for treatment. After treatment, the tail gas meets emission standards, and the recovered liquid solvent is sent back to the production workshop for reuse after phase separation treatment.
When purchasing skid-mounted multi-component solvent liquefaction and recovery equipment for pharmaceutical companies, it is important to pay attention to core points during model selection. The manufacturer should possess the ability to conduct condition surveys and multi-component material balance calculations, and combine on-site air volume, solvent ratio, moisture content, intermittent production cycle to calculate recovery volume, energy consumption, and investment return period, rejecting standardized one-size-fits-all configurations. The exhaust gas contains dichloromethane halogenated hydrocarbon components, so it is necessary to configure special membrane components resistant to halogenated hydrocarbons to avoid membrane element swelling and failure. The skid-mounted unit should have a well-designed internal flow path and strictly control the system back pressure, without increasing pipeline pressure, to ensure that the negative pressure of the reaction kettle and vacuum pump is not disturbed. The overall explosion-proof rating should match Class A workshops, and be equipped with a full set of safety interlocks for combustible gases, overtemperature, and overpressure. The pre-treatment unit should be fully equipped and not simplified or reduced, extending the service life of the condenser and membrane components. It is preferred to choose a source factory with its own production workshop and experience in implementing pharmaceutical multi-component exhaust gas skid-mounted projects, avoiding simple integrated assembly manufacturers to ensure spare parts supply and fault response efficiency.
Luoyang Wohong Petrochemical Equipment Co., Ltd. is a reliable source manufacturer of skid-mounted pharmaceutical solvent liquefaction recovery equipment. We have our own standardized production workshop and refuse to simply assemble components. We have deep experience in pharmaceutical multi-component intermittent exhaust gas conditions. The entire skid-mounted unit integrates compression, condensation, membrane separation, pretreatment, and explosion-proof electronic control. It undergoes assembly, welding, pressure testing, and overall linkage testing before leaving the factory. Special optimizations are made for halogenated hydrocarbon corrosion, concentration shock, and system back pressure control. The overall explosion-proof rating is ExdⅡCT4, with complete safety interlock protection. The PLC variable frequency automatic operation allows for automatic power adjustment according to exhaust gas load, adapting to batch intermittent production. The comprehensive recovery rate of multi-component mixed exhaust gas can reach 95-98%. The equipment covers a small area and can be placed indoors or outdoors, requiring no complex civil engineering. It can be quickly put into operation after arriving at the site and connecting to air ducts and power supply. It produces almost no hazardous waste such as waste activated carbon, reducing long-term operation and maintenance expenses for enterprises. It is suitable for new production lines and environmental protection technological upgrades of old workshops.
The equipment is suitable for active pharmaceutical ingredients, pharmaceutical intermediates, CDMO, and fine chemical enterprises. It can treat various mixed organic waste gases such as dichloromethane, acetone, ethyl acetate, butanone, ethanol, and n-hexane, covering waste gas sources such as reactor off-gas, vacuum drying off-gas, distillation non-condensable gas, vacuum pump exhaust, and tank breathing gas.
We can provide a full range of services including on-site condition survey, exhaust gas condition analysis, multi-component material balance calculation, investment return calculation, customized process plan, skid-mounted 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 multiple sets of practical achievements in the implementation of skid-mounted multi-component solvent recovery projects in the pharmaceutical industry, helping enterprises achieve up-to-standard exhaust gas emissions and complete the resource recovery and recycling of organic solvents.