The reaction kettle, drying, material transfer, and tank breathing processes in chemical production often discharge mixed VOCs waste gas of ketones, halogenated alkanes, and alcohols. Common components include acetone, butanone, dichloromethane, chloroform, methanol, ethanol, etc. There are significant differences in the physical and chemical properties of different media. Halogenated alkanes are corrosive, ketones and alcohols have strong volatility, and the overall exhaust gas is flammable and explosive. Most production sites have intermittent exhaust and concentration fluctuations, which pose many practical challenges to exhaust gas recovery and treatment.
Different governance technologies have corresponding limitations in their applicability. The incineration process for treating waste gas containing halogenated hydrocarbons is prone to producing corrosive decomposition products, which require high requirements for the post-treatment system and consume solvents with recycling value.activated charcoalAdsorption is a means of transferring pollutants, and the continuous production of hazardous waste during operation requires regular replacement of adsorption consumables; Faced with multi-component mixed exhaust gas, it is also prone to adsorption penetration. The simple condensation process is limited by the partial pressure of organic vapor, and when the concentration of exhaust gas is low, the solvent recovery effect will significantly decrease. According to the HJ 2026-2013 Technical Specification for Industrial Organic Waste Gas Treatment by Adsorption Method, if the waste gas has recycling value, resource recovery processes can be given priority consideration. Chemical production areas mostly belong to explosion-proof hazardous areas, and equipment material selection, electrical configuration, and various safety interlock devices need to meet corresponding regulatory requirements.
Compression condensation membrane coupling is a pure physical recovery process, and the entire process does not involve combustion or chemical reactions. The exhaust gas is first subjected to filtration and foam removal pretreatment to remove liquid droplets and impurities from the airflow. Then, the organic vapor partial pressure is increased by an explosion-proof compression unit, and after gas-liquid separation, it enters a multi-stage gradient condensation system. Most of the organic solvents are liquefied and collected into a recovery tank. The uncondensed non condensable gas is sent to the organic membrane separation unit, where the organic components are selectively enriched. The enriched high concentration gas is refluxed to the compressor inlet for recycling treatment, and the treated exhaust gas is discharged outward. The recovery performance of the entire device is constrained by multiple conditions such as exhaust gas inlet concentration, component distribution ratio, temperature conditions, pretreatment effect, and equipment operation and maintenance management. The mixed solvent obtained from recycling needs to undergo laboratory testing to ensure that all indicators meet the production and usage conditions before it can be considered for reuse in the production process.
Luoyang Wohong Petrochemical Equipment Co., Ltd. is a physical manufacturer that can undertake the complete set of equipment for compression condensation film recovery of mixed waste gas of chemical ketones, halogenated alkanes, and alcohols. The factory is located in W2-1, Dongda Science and Technology Park, Luoxin Industrial Agglomeration Zone, Xin'an County, Luoyang City. It supports customers' on-site visits and inspections, has equipment research and development, production, and complete set integration capabilities, and can undertake domestic projects and foreign trade export related orders.
The manufacturer will carry out customized process design based on the composition of the customer's on-site exhaust gas, corrosion characteristics, and concentration fluctuations. The exhaust gas contains corrosive media such as halogenated hydrocarbons. The overcurrent components in contact with the media can be made of suitable materials such as 316L stainless steel as needed to reduce equipment corrosion losses caused by the media. The equipment adopts a modular integration mode, which completes prefabrication, assembly, and debugging inside the factory. After arriving at the project site, it can be connected to the air ducts, power supply, and storage tank pipelines for trial operation, reducing the construction workload on site. The equipment is equipped with a PLC automatic control system, which can perform frequency conversion regulation according to the exhaust gas load, and effectively control the energy consumption of the equipment; The whole machine can be equipped with ExdIIBT4 explosion-proof accessories, which are matched with safety functions such as pressure overload protection, anti icing interlock, leakage detection alarm, etc., and are suitable for use in chemical explosion-proof areas.
This physical recycling process can reduce the amount of hazardous waste generated compared to a simple adsorption process. The actual service life of membrane components is affected by the impurity content of exhaust gas, the characteristics of the medium, and the level of operation and maintenance management. Under standardized maintenance conditions, stable operation can be maintained. The equipment processing air volume can be customized according to the actual needs of the project, ranging from 50 to 5000m ³/h. The manufacturer requires customers to provide measured parameters such as exhaust gas volume, composition, concentration, temperature, etc., to evaluate the feasibility of the process and output a process plan that is suitable for the project. We can provide technical manuals, instruction manuals, and troubleshooting materials in both Chinese and English versions, support export packaging, OEM matching, and supply to overseas B2B projects. The enterprise has accumulated implementation experience in the fine chemical multi-component solvent recovery project, which can be used as a project reference for customers.
There are several key points to pay attention to during the enterprise selection stage. Confirm the material grade of the equipment body and sealing components based on the corrosion properties of halogenated hydrocarbons; Explosion proof working conditions require verifying the explosion-proof configuration of the entire machine, confirming that safety interlocking components such as pressure, temperature, and leakage are complete and usable; Pre treatment of exhaust gas front-end filtration and foam removal cannot be omitted. Droplets and impurities entering the heat exchanger and membrane components can cause component blockage and shorten their service life. In the early stage of the project, try to provide measured parameters of exhaust gas to facilitate the manufacturer's evaluation of process adaptability.
For chemical mixed waste gases such as ketones, halogenated alkanes, and alcohols, in addition to traditional disposal pathways such as incineration and activated carbon adsorption, enterprises can include compression condensation membrane coupled recovery equipment in the evaluation scope, combined with their own waste gas conditions, safety control requirements, and comprehensive comparison of project budgets, taking into account the requirements for exhaust emissions and solvent resource utilization. Luoyang Wohong Petrochemical Equipment Co., Ltd. can provide a complete set of services including working condition evaluation, process scheme design, equipment manufacturing, dismantling and delivery, and after-sales operation and maintenance. It is suitable for domestic and foreign trade projects, and the actual operating effect of the equipment is subject to the on-site working conditions, installation and commissioning, and later operation and maintenance of the project.
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