VOCs organic compoundsWaste gas treatment equipmentThe selection of waste gas is the most controversial aspect in waste gas treatment projects.activated charcoalAdsorption, thermal storage combustion, catalytic oxidation, condensation recovery, membrane separation, each technical route has its own applicable boundaries. For organic waste gases such as oil, gas, and solvents, the combination process of condensation film method has achieved a good balance between recovery value, operating cost, and emission effect, and is becoming an increasingly popular choice for more and more enterprises.
The investment in activated carbon adsorption process is low, but it needs to be replaced or regenerated after adsorption saturation. Waste activated carbon is a hazardous waste with high disposal costs, and the desorption process is prone to secondary pollution. Thermal storage combustion and catalytic oxidation can thoroughly oxidize and decompose VOCs, making them suitable for medium to high concentration and non recyclable waste gases. However, they have high energy consumption and significant long-term operating costs. The condensation process can directly liquefy and recover solvents from high concentration exhaust gas, but the efficiency decreases when the concentration is low. Membrane separation technology is good at treating low concentration exhaust gases, concentrating VOCs and recycling them for treatment.
The combination of condensation and membrane separation forms complementarity: the condensation module comes first, liquefying and recovering high concentration components to generate direct economic benefits; The membrane separation module further concentrates the low concentration exhaust gas to ensure that the emission concentration meets the standard. The entire system is physically separated, without combustion, and without adsorbent replacement, avoiding the safety risks of hazardous waste disposal and high-temperature operation, and the operating costs are relatively controllable.
Taking solvent recovery projects as an example, the recovered solvents themselves have value, and the longer the operating time, the more considerable the recovery benefits. The equipment adopts a pry mounted design, completes assembly and debugging at the factory, is quickly put into operation on site, and has low installation costs; Daily maintenance mainly includes regular maintenance of compressors, membrane components, and heat exchangers, with controllable maintenance costs. For long-term operating production lines, the overall cost is often better than combustion based processes.
This process is suitable for oil and gas storage and transportation, solvent use, chemical production and other scenarios, especially for projects with relatively single waste gas components and recycling value. If the exhaust gas contains corrosive components or high boiling point polymeric substances, it is necessary to increase the pre-treatment process. Before selecting, it is necessary to complete exhaust gas testing, obtain concentration, air volume, and component data, and then make targeted matching with equipment manufacturers.
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