Processes such as the synthesis, crystallization, extraction, centrifugation, and vacuum stripping of pharmaceutical intermediates generate substantial volumes of VOC-containing exhaust gases, which commonly include solvents like dichloromethane, acetone, ethyl acetate, and isopropanol. The production of intermediates is mostly batch operation, the concentration of exhaust air volume fluctuates greatly, the air flow entrains material droplets and water vapor, many media are flammable and explosive, halogenated solvents are corrosive when hydrolyzed with water. Pharmaceutical intermediates factory not only to meet the stringent environmental emissions, but also hope to recycle solvents to reduce raw material procurement costs, traditional incineration,activated charcoalThe limitations of the adsorption scheme are obvious, and the compression-condensation-membrane separation recovery device has been applied in a large number of projects.
The traditional treatment process is prominent in the short board under the condition of pharmaceutical intermediates. The incineration process will destroy the recyclable solvent, the halogen-containing medium is easy to generate corrosive and harmful substances, and the post-processing supporting cost is high. Activated carbon adsorption is a means of pollutant transfer, hazardous waste output is large, multi-component, high-humidity exhaust gas is prone to adsorption penetration, requiring frequent downtime to replace consumables. The simple condensation process is constrained by the partial pressure of organic vapor, and the recovery efficiency in the low concentration range is insufficient. Compression-condensation-film coupling is a purely physical recovery process, no combustion, no chemical reaction. The tail gas is first pre-treated by filtering and defoaming to remove liquid droplet impurities, the explosion-proof compressor increases the partial pressure of organic vapor, and multi-stage gradient condensation to liquefy and collect most of the solvent; the uncondensed tail gas enters the organic membrane unit to complete component enrichment, and the high-concentration permeate gas flows back to the compressor inlet for circulation treatment. Recycled solvents can be reused in production after testing to meet the standards, effectively reducing the generation of hazardous waste, taking into account environmental compliance and resource benefits.
Pharmaceutical intermediates factory selection of recycling device, a number of configuration points can not be ignored. For corrosive media such as halogenated hydrocarbons, 316L stainless steel is preferred for flow components, valves and seals to avoid the risk of corrosion and leakage. The explosion-proof level of the whole machine is not less than ExdIIBT4, and it is equipped with a full set of safety devices for overpressure protection, overtemperature interlocking and combustible gas leakage alarm. The pretreatment of front-end filtration and defoaming cannot be deleted. Fog droplets and impurities will cause blockage and damage to the heat exchanger and membrane components. The automatic control system is suitable for intermittent batch production, supports frequency conversion adjustment, and bears the impact load of exhaust concentration. In the early stage of the project, it is necessary to provide measured parameters such as exhaust air volume, composition, concentration, water content, etc., and customize the process plan. Standard models cannot be directly applied.
LuoyangWohong PetrochemicalEquipment Co., Ltd. is a complete equipment manufacturing service provider of VOCs organic solvent recovery device in pharmaceutical intermediate factory. The factory is located in W2 ‑ 1, Dongda Science Park, Luoxin Industrial Agglomeration Area, Xin 'an County, Luoyang City. It supports customers to inspect the factory on the spot. It has complete integration capabilities of research and development, manufacturing and skid-mounted, system certification, CNEX explosion-proof related qualifications, accumulates many landing cases of pharmaceutical intermediate projects, and can undertake domestic projects and foreign trade export orders.
The whole set of equipment adopts factory skid-mounted prefabrication, and leaves the factory after assembly and commissioning. The air duct, power supply and storage tank pipeline can be connected on site and put into operation, thus reducing the on-site construction period. The processing air volume of 50-5000 m/h supports non-standard customization, PLC frequency conversion automatic control system is adapted to intermittent fluctuation exhaust gas working conditions, a full set of safety interlocking meets the use conditions of chemical explosion-proof areas, can provide Chinese and English technical data, and supports OEM and export packaging.
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