The treatment of damaged dust bags is a very difficult problem. Due to the abolition of the dust bag surface has a large amount of dust, dust composition is complex, such as waste incineration industry using filter bags, the surface contains heavy metals, Ering and other toxic, harmful, corrosive substances. Chemical treatment method can also be applied to high-temperature cracking method.

2. High-temperature cracking method

High-temperature cracking is the use of high temperature to make PTFE decomposition. This method is difficult to control the type of decomposition products, and also produces many toxic by-products. It requires high process equipment and parameter settings to recover the useful decomposition products and is generally discouraged.
High-temperature cracking is less demanding on PTFE recycled material, either pure PTFE or filled with other materials can be recycled using high-temperature cracking. The factors that affect high temperature cracking are: temperature, pressure, time, atmosphere, feed rate, etc.

The main reason is that the process is too complex and the investment is too large, while abroad there are many studies in this area, and some results have been put into industrial production: C.M. Simon et al. used fluidized bed pyrolysis of PTFE scrap to recover TFE, HFP, OFCB. The mass fraction of recovered material is up to 91% when the process parameters are fluidized bed temperature of 600°C and dwell time of 3s, and also the fillers in the waste, such as glass fiber, graphite, copper powder and other materials can be recovered) The most important feature of this system is that it can be operated continuously, and the system has been industrialized in Germany with a capacity of 400t/year of waste PTFE.

www.yckjgf.com