Thread Content
Large-pore resin is used for the adsorption and recovery of halogenated hydrocarbon-containing exhaust gases. In industries such as pesticide chemistry, pharmaceutical chemistry, and other fine chemical industries, various halogenated hydrocarbon solvents such as dichloromethane, dichloroethane, chloroform, dibromomethane, dibromoethane, bromopropane, and chlorobenzene are used in certain production processes. Since most of these solvents have high saturated vapor pressures and are highly volatile, large amounts of exhaust gas containing solvent components are released during the production process, which not only leads to solvent loss but also contaminates the environment. Economically efficient recovery and reuse of such exhaust gases can not only address the issue of exhaust gas pollution but also reduce solvent consumption; it is an essential means to achieve energy conservation, emission reduction, and compliance with environmental standards. As **environmental protection standards continue to rise, exhaust gas treatment equipment and facilities must also enhance their processing capacity to meet the increasingly stringent legal requirements. In the treatment of exhaust gases containing chlorinated hydrocarbons, the large-pore adsorption resin process, which has emerged in recent years, serves as an alternative adsorbent to activated carbon and carbon fiber, and boasts the following advantages: 1. High adsorption precision, enabling continuous and stable emission that meets regulatory standards; 2. Strong hydrophobicity, allowing it to function unaffected by the humidity of the incoming gas or the adsorbent material, thus offering better versatility; 3. Large specific surface area, resulting in high adsorption capacity, along with easy and thorough desorption, and low energy consumption during regeneration; 4. No catalytic action or water-gas reaction involving carbon materials, ensuring safety during use; 5. High mechanical strength of the adsorbent, reducing the risk of wear or fragmentation, thereby extending its service life and eliminating the need for complete replacement. Process overview: Depending on the exhaust gas emissions and the user’s requirements for gas treatment, the equipment is equipped with two or more adsorbers. The treatment process is as shown in the figure below: The exhaust gas containing organic solvents undergoes pretreatment (such as filtration, washing, and cooling), after which it is pressurized by a fan and fed into a resin adsorber. The organic solvents in this gas are absorbed by the adsorbent, and the purified gas is then released. The adsorbent is desorbed using saturated steam. Steam enters from the top of the adsorber, passes through the adsorbent in the opposite direction, thereby desorbing the adsorbed organic substances and carrying them out of the adsorber into the condenser ； In the condenser, the mixture of organic substances and water vapor is condensed and flows into the separation tank; through gravity-based separation, the organic substances are recovered. After the adsorption bed has completed desorption and been regenerated through closed-loop cooling, it switches back to the adsorption state, thus completing one operation cycle. Throughout the process, the adsorption bed operates in a continuous alternating, cyclic manner. Depending on the exhaust gas conditions, the adsorption unit can be designed with two adsorbers used in alternation, or with multiple adsorbers connected in series for multi-stage adsorption, so as to meet the requirements of exhaust gas treatment standards. We have multiple sets of operating equipment in industries such as pharmaceuticals and agrochemicals, with a recycling efficiency of over 99.99%. The exhaust emission standards meet or exceed **the required levels, which helps to solve the actual problems faced by our clients and has earned us very high praise from them. Friends who are interested are welcome to visit our actual project factory for inspection. We are well aware that at this stage, enterprises face various pressures, including environmental protection requirements, the challenge of selecting appropriate technologies for exhaust gas treatment, and high costs associated with environmental protection measures. The difficulties and obstacles faced by our clients are precisely the issues that we need to address. Adhering to the principles of efficient operation and cost-effectiveness, we carefully design tailored exhaust solutions for each customer, exceeding their expectations and earning them unanimous and widespread praise. Shijiazhuang Liuke Environmental Protection Machinery Co., Ltd. looks forward to working together with you to create a green ecological home and enjoy beautiful mountains, clear waters, and a blue sky! Shijiazhuang Liuke Environmental Protection Machinery Co., Ltd. Contact person: Liu Pengfei 18633039032 Phone/Fax: 0311-67364616 Email: liukeshebei@163.com 176417651766