Catalytic combustion equipment catalytic process


Catalytic combustion equipment catalytic process

catalytic combustion equipment catalytic process:

Generally, the treatment methods of VOC catalytic combustion equipment can be divided into two categories:

One is the so-called non-destructive technology, that is, the recovery method, which usually changes the physical conditions (such as temperature and pressure) in the process to enrich and separate VOCs. These methods include activated carbon adsorption, solution absorption, condensation and membrane separation.

One is the so-called destructive technology, that is, the chemical or biological technology to convert VOCs into carbon dioxide, water, hydrogen chloride and other less toxic inorganic substances. These methods include direct combustion, catalytic combustion, biodegradation, plasma oxidation, photocatalytic oxidation and other common technologies.

Due to the type, concentration and emission method of VOC, each method has its own process characteristics. The process conditions and requirements for handling VOC also have different application ranges and advantages and disadvantages. For example, the condensation process is suitable for the treatment of high concentration, small air volume VOC waste gas. The treatment of VOCs waste gas with low concentration and large air volume has the disadvantages of large investment, high operating cost and low profit. Biological methods have more restrictions on the concentration and type of volatile organic compounds. Most of the research is still laboratory-scale experimental research, which has not been applied to large-scale practical engineering.

The adsorption method has a good treatment effect on the exhaust gas of low-concentration VOC catalytic combustion equipment, but it may cause pollution to transfer from the gas phase to the solid phase and cause secondary pollution problems. The direct combustion method is suitable for treating exhaust gas with high VOC concentration, because its working temperature usually reaches 800-1200 ℃, the process energy consumption cost is high, and it is easy to produce by-products such as dioxane and NOx. In the combustion exhaust gas; catalytic combustion equipment can handle low-concentration VOCs gas far below the direct combustion temperature. It has the characteristics of high purification efficiency, no secondary pollution and low energy consumption. It is one of the effective treatment methods for commercial VOCs. Therefore, researchers have done a lot of related research on catalytic combustion equipment catalysts, and related issues have become hot issues in the field of environmental catalysis in recent years.