Help: How to achieve online coking removal in a 150°C U-tube heat exchanger?
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Two U-tube heat exchangers are severely caked with carbon; their operating temperatures are 150°C and 230°C respectively. Are there any measures available for online cleaning?
Charcoal? To achieve online coking removal, 150°C U-tube heat exchangers generally employ an effective constant-temperature fluid flow or pulsed liquid constant-temperature heat exchange system. The specific heat exchange methods include: 1. Constant-temperature fluid flow heat exchange: controlling the temperature as much as possible while ensuring effective heat transfer, thereby enabling on-line coking removal. 2. Pulse liquid thermostat: This heat exchanger enables improved heat transfer efficiency, reduces the temperature of the flue gas generated during coking, decreases the amount of coke produced, and lowers energy consumption, thereby achieving online coking removal.
It’s mainly the carbides formed by organic substances in the heat exchange medium at high temperatures. I’m not familiar with these two types of equipment you mentioned; are there any relevant project experiences available?
Organic matter forms mainly residual carbon, or a mixture of oil coke. Similar situations have occurred in petrochemical enterprises such as Sichuan Petrochemical and Guangxi Petrochemical regarding reformation and catalytic bottom reboilers. AOLO online chemical cleaning technology can be used as a solution to the aforementioned problems.
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