How can PTFE filter bags be used in garbage incineration?

As the main technology widely used in the country, garbage incineration has also been rapidly developed in China in recent years due to its outstanding advantages such as high recoverable heat energy, large reduction and harmless treatment. Therefore, the bag type dust removal technology and the application of high-temperature filter materials, especially polytetrafluoroethylene (PTFE) filter materials, which have been developed simultaneously with it, have gradually attracted people's attention.

The dust removal filter bag is the heart of the bag type dust remover during operation. The dusty gas enters the bag filter area of the box, and most of the dust is trapped on the outer surface of the filter bag, while the clean gas enters the filter bag through the filter material. The purified gas enters the upper box through the filter bag mouth, and then is discharged from the air outlet.

PTFE has a strong adaptability to the combined influence of high temperature and chemical action due to its inherent stability, less active polymer chain structure and the effect of intermolecular force and chain order. Its melting point is 327 ° C, and its transient temperature resistance can reach 300.

With strong oxidation resistance, non hydrolysis and good mechanical properties, it is widely used as filter material of dust remover on garbage incinerator. The performance of the filter material made by covering PTFE membrane on the base cloth made of PTFE fiber is much higher than that of other filter materials.

Due to the unique advantages of PTFE filter material, its application in the industry is more and more. PTFE filter bags are also widely used in foreign garbage incinerators, coal-fired power plants, and industrial pits for dust removal. PTFE film is covered on the base cloth made of high temperature filter material, and the better use effect is that both the film and the base cloth are made of PTF and the stitches are also made of PTFE. Due to the high content of acid gas, water vapor, flue gas temperature and particle concentration in the flue gas of garbage incinerator, the use of PTFE as a filter bag has more obvious advantages.