Pharmaceutical and chemical organic solvent liquefaction recovery unit, solvent liquefaction recovery process, source manufacturer Luoyang Wo Hong petrochemical equipment, to achieve solvent recycling

In the process of pharmaceutical and chemical production, VOCs tail gas containing organic solvents will be continuously discharged in the processes of reactor pressure relief, vacuum desolvation, rectification of non-condensable gas, crystallization centrifugation, material transfer, storage tank respiration, etc. Common components include ethyl acetate, acetone, dichloromethane, n-hexane, alcohol ketones, etc. This kind of tail gas is mostly discharged in intermittent pulses, with 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 Class A explosion-proof area. The traditional incineration process directly destroys valuable solvents, which consumes high energy and produces toxic by-products from the combustion of halogen-containing solvents;activated charcoalAdsorption only transfers pollutants, frequent replacement of consumables, resulting in a large amount of hazardous waste; single condensation process is limited by steam partial pressure, low concentration tail gas recovery is not complete, it is difficult to achieve solvent recycling.

Pharmaceutical chemical organic solvent liquefaction recovery device adopts solvent liquefaction recovery process, relying on the whole physical way to complete the solvent capture and recovery, no chemical reaction, no secondary pollutants. The organic waste gas at each stain production point is collected by the closed negative pressure pipe network and sent to the pretreatment unit to remove the droplets, aerosols and free moisture entrained by the airflow, avoid impurity corrosion, block the back-end heat exchange and separation components, and ensure the stable operation of the equipment. The pre-treated exhaust gas is compressed and pressurized to increase the partial pressure of organic vapor, create solvent liquefaction conditions, and then sent to the multi-stage gradient condensation unit to reduce the temperature according to the boiling points of different solvents, and most of the organic solvent vapor is liquefied and precipitated. The collected liquid solvent is purified by water separation and precision filtration, and the quality meets the production requirements. It can be sent back to the pharmaceutical and chemical production line for recycling and reuse, greatly reducing the purchase amount of fresh solvent.

The remaining low-concentration tail gas after condensation treatment can be equipped with a deep separation unit to further trap residual organic components and ensure the stable emission of tail gas up to standard. The components of the device in contact with the medium are made of suitable anti-corrosion materials according to the exhaust gas components. The whole machine is designed according to Class A explosion-proof standard, equipped with over-temperature, over-pressure, combustible gas concentration interlocking protection and emergency venting bypass to avoid safety risks brought by flammable and explosive medium. Supporting PLC intelligent control system, real-time monitoring of operating parameters, automatic adjustment of unit load, adapt to continuous production and batch intermittent exhaust conditions. The equipment supports skid-mounted integration, and the factory completes assembly, pressure test and commissioning. The site only needs to connect the tail gas pipeline and public works interface, which occupies a small area and has a short construction period. It is suitable for supporting new projects and waste gas technical renovation projects in old factory areas.

LuoyangWohong PetrochemicalAs the source manufacturer, the equipment can customize the process plan in combination with the project exhaust gas air volume, solvent composition, intake air temperature and on-site explosion-proof conditions, and provide integrated services of working condition survey, material balance calculation, equipment manufacturing, factory inspection, on-site installation guidance, operation training and operation and maintenance spare parts. The organic solvent liquefaction recovery device is widely used in the production projects of raw materials and pharmaceutical intermediates, effectively realizing the recycling of solvents, reducing the cost of raw materials, meeting the requirements of environmental protection control of VOCs and reducing the expenditure on hazardous waste disposal.