Installation of non-metallic fabric compensator precautions.

As the internal medium temperature of the flue and hot air duct is relatively high, in order to prevent the expansion joint from being scalded through, generally choose non-metallic expansion joints made of high temperature resistant materials. For the hot air supply powder pipeline, due to the presence of coal particles in the pipeline, in addition to meet the above thermal compensation requirements, should also consider the expansion joint has a certain anti-wear capacity to extend its service life, so generally less use of non-metallic expansion joints.
 
Expansion joints can not only effectively absorb the expansion of the pipeline, but also effectively absorb pipeline vibration, and can be used to isolate the vibration of the equipment interface.
 
When calculating the selection, in addition to the working temperature requirements, we must pay attention to the thermal displacement of the pipe system and the thermal displacement of the equipment interface for superposition, in order to be used as the basis for the selection of non-metallic expansion joints.
 
If the expansion joint is found to be burned through in operation, it should be dealt with in time. In the case of wide expansion joints, serious cracking of castables and time constraint, the expansion joints can be filled with ceramic fibers and the ceramic fibers can be coated with high-temperature hot plugging glue in layers, which on the one hand reinforces the bond between ceramic fibers and expansion joints, and on the other hand, the cracked castables can be sealed temporarily and replaced after shutdown.