The exhaust gas contains a large amount of cooking fumes

It depends on what the raw materials are and how much flue gas there is

This post was last edited by slll611 on 2016-4-30 at 23:58. Have you used safety process monitoring gas analyzers? P You can contact me via private message.

It mainly depends on whether it is necessary to recover the useful components from the exhaust gas. Generally speaking, the oil fumes in exhaust gases include liquid droplets and mists suspended in the gas stream, such as oil droplets, water droplets, and other solvent droplets; solid particulate matter suspended in the gas stream; as well as solid-liquid aggregates. If the oil fumes in the exhaust gas have high recovery value, it is best to recover the solid and liquid phases first before carrying out spraying. Otherwise, the solid-liquid phase that should have been recovered mixes with the washing liquid, making subsequent processing more complex and increasing the costs. If the oil fumes in the exhaust gas have no value for recovery, they can be washed away from the exhaust gas by direct spraying. Whenever spray washing is used, an efficient kinetic gas-liquid demister must be installed after the washing stage. What technical equipment is used to remove grease particles from exhaust gases? Due to the complex composition of exhaust gases, as well as the presence of oil droplets and solid dust in them, it is advisable to avoid using high-voltage electrostatic demisting and dust removal equipment. There are mainly two reasons for this: first, oil mist and solid dust are prone to catching fire, so careful consideration must be given to safe operation ； Secondly, oil foam and solid dust accumulate to form sludge; over time, this sludge builds up on electrical components, creating a hard layer that reduces the efficiency of these components and increases the costs associated with operation and maintenance. Furthermore, electrostatic dust and foam removal equipment imposes fairly strict requirements on the physicochemical properties of the gases carried by the airflow, as well as on the size distribution of liquid droplets and particles and the flow pattern of the gas; otherwise, the operational efficiency will be unsatisfactory. For exhaust gas containing cooking fumes, dust and foam removal technologies and equipment based on blocking methods such as screen-type, fiber-type, or bag-type systems are also not suitable. This is also mainly due to two considerations: First, oil foam and solid dust can accumulate to form sludge and grease. The sludge and grease that are trapped accumulate within the fibers, becoming thick and hard, which quickly blocks the flow channels and causes obstructions in the internal air passages. Secondly, moving oil bubbles and particles can easily generate and accumulate static electricity, posing safety risks of ignition and even explosion, which require close attention. It is recommended to treat exhaust gas containing cooking fumes using a combination of wash water spraying and kinetic defoaming and demisting. Except in extremely rare cases where the exhaust gases contain highly reactive chemicals that ignite upon contact with water, such as active metal powders, the washing water has a flame-retardant and antistatic effect on the vast majority of oil droplets and particulates present in the exhaust gases, thereby reducing safety risks such as fires. Washing water is effective at cleaning exhaust gas containing dust and oil droplets, and the oil/water/sand removed through washing can be satisfactorily separated and treated separately using simple methods. Of course, after the wash water is sprayed onto the waste gas for washing, some of the wash water droplets and mist are also carried away by the air flow. Therefore, anti-clogging, long-lasting, and low-operating-cost demisting separators must be used to finally capture the water droplets and mist in the washed gas. In recent years, the feather-leaf type high-efficiency demisting and defoaming separation technology has been promoted for use both domestically and internationally. Compared with electrostatic demisting and dust removal devices, as well as screen-type, fiber-type, bag-type and other dust and mist removal equipment used in the treatment of fume-containing waste gas, it offers numerous technical and economic advantages: great operational flexibility, resistance to adhesion and blockage, an extremely long stable operating life, and very low operation and maintenance costs. For detailed technical information on the feather-leaf type high-efficiency demisting and defoaming separation technology, please visit the link http://bbs.hcbbs.com/thread-1354814-1-1.html on the HaiChuan Chemical Industry Forum for more details. For more professional technical solutions, please contact specialized separation technology companies directly for collaboration.