Polytetrafluoroethylene carbon fiber backer board

Abstract

The invention relates to a polytetrafluoroethylene carbon fiber backer board. The polytetrafluoroethylene carbon fiber backer board comprises a polytetrafluoroethylene liner board and is characterized in that the back surface of the polytetrafluoroethylene liner is high-temperature and high-pressure thermal bonded with a carbon fiber cloth layer. The polytetrafluoroethylene carbon fiber backer board provided by the invention is convenient for bonding the polytetrafluoroethylene liner board with an inner wall of a chimney together through the carbon fiber cloth layer, can prevent the inner wall of the chimney from contact and corrosion of waste gas of industrial fuels containing a great amount of corrosive sulfide materials and the like, and can play a strong reinforced effect for the chimney. The polytetrafluoroethylene carbon fiber backer board provided by the invention is suitable for being used as inner liners of the chimney.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene backing board, in particular to a polytetrafluoroethylene carbon fiber backing board. Background technique [0002] The tail gas of industrial fuels is usually discharged through chimneys, and most of the tail gases of industrial fuels contain a large amount of corrosive sulfides. 2 SO 3、 h 2 SO 4 Such corrosive acids, especially when the temperature exceeds 100°C, the corrosion is more serious. Due to long-term contact with corrosive sulfide, the sulfide infiltrates into the capillary, causing cracks in the chimney and requiring maintenance and repair. However, this The height of chimneys made of titanium alloy materials is generally 120-200m, which makes welding more difficult and maintenance costs larger during maintenance. In addition, this kind of titanium alloy is almost all imported from abroad, and the price is very expensive, and the actual service life is only about one to two years. In ...

AI Technical Summary

Problems solved by technology

[0002] The tail gas of industrial fuels is usually discharged through chimneys, and most of the tail gases of industrial fuels contain a large amount of corrosive sulfides. 2 SO 3、 h 2 SO 4 Such corrosive acids, especially when the temperature exceeds 100 °C, the corrosion is more serious. Due to long-term contact with corrosive sulfide, the sulfide infiltrates into the capillary, causing cracks in the chimney and requiring maintenance and repair. However, this The height of the chimney made of titanium alloy material is generally 120-200m, so there are problems of welding difficulty and high maintenance cost during maintenance.

In addition, this titanium alloy is almost all imported from abroad, and the price is very expensive, and the actual service life is only about one to two years

In order to solve the service life of the chimney emitted by the corrosive exhaust gas of industrial fuels, and to overcome the problem that the PTFE liner is difficult to bond with other materials due to its smooth surface, PTFE glass fiber backing was used However, due to the performance of glass fiber, the PTFE glass fiber backing board has not achieved a more ideal effect. Therefore, a novel PTFE carbon fiber backing board is introduced.

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