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Scope of application of high temperature denitration expansion joint skin
1 power plant flue system, an air duct secondary air duct system
2 chemical plant of low pressure air pipe system
3 cement plant piping system
4 steel flue system, air duct system.

High temperature denitration expansion joint skin maintenance change of performance
Non-metallic expansion joint envelope within normal service life cycle, no maintenance, non-metallic expansion joint skin replacement is more convenient than the metal expansion joint. This is especially obvious for large size of the expansion joint.
The service life of life: expansion joint skin is closely related to the environmental conditions, in coal-fired power plants, the general said, are more than 5 years service life. Under the condition of working temperature below 300 ℃, using 8 to 9 years of not a few. Burning fuel power plant situation is more complex, if light oil, diesel oil, the service life of expansion joint skin can generally 3 to 4 years, if the burning heavy oil or crude oil, because want to often clean, the expansion joint of skin damage is more serious, usually only 1 or 2 years.

The use of high temperature and denitration expansion joint skin pressure
Non-metallic expansion joint skin work pressure is generally not more than 0.5 bar (50 kpa). More than 0.5 under the condition of atmospheric pressure, need to consider using metal expansion joint or rubber expansion joint.

The use of high temperature and denitration expansion joint skin medium
Non-metallic expansion joint skin generally applies only to the gas, if the medium containing water, will need to use the drain water.


High temperature denitration expansion joint skin material selection
Denitration environment without catalyst, reaction temperature at 800 ℃, and the reaction after the application of the catalyst temperature between 300 ℃ to 450 ℃, is out of stock system requires high temperature reaction, so for high temperature denitration skin, you need to choose to work for a long time at 300 ℃ to 450 ℃ environment non-metallic skin, can guarantee the quality of non-metallic expansion joint. Non-metallic compensator denitration skin material selection is as follows:
1. Stainless steel wire mesh 20 mesh wire 0.2 1 layer
2. Four fluorine membrane 0.3
3. 1.2 wire cloth
4. Four fluorine membrane 0.3
5. 1.2 wire cloth
6. 1.2 wire cloth
7. High strength acupuncture blanket 10
8. 2.0 wire ceramic cloth