Catalytic external heat exchanger
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When heating the lining of the catalytic external heat exchanger, cannot steam be used to protect the tube side? Must water be injected instead? Why? Thank you!
When you operate the boiler, the heat exchange tubes are filled with water – how can steam be used for protection in that case?
It’s all filled with water; it’s protected using water
It’s filled with water, which serves as a protective layer
The sintering temperature for the regenerated lining is around 550 degrees. The temperature of the superheated steam is around 480-450 degrees. Exterior heat-exchange tubes have a temperature resistance of around 450-500 degrees. If steam protection is used, the material resistance of the pipes decreases, and there is a higher risk of pipe rupture under increased loads. So, no steam protection is needed when baking the lining.
By injecting steam, no circulation can be established, and the furnace tubes cannot be protected; it’s equivalent to burning dry.
Hello, what you are referring to is heating the liner of the external heat exchanger, while simultaneously steaming the drum and furnace tubes； This process requires water and the addition of chemicals ； Since the furnace tubes are filled with water, it is difficult to raise the temperature; this has an impact on drying the external heat-exchange lining, and it also takes a long time,,,
Yeah, it must be filled with water for protection. If steam is used, a dry pot phenomenon will occur, causing deformation and damage to the tube side.