[Q&A Question 211] 2016.11.17
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【Q&A Question 211】November 17, 2016: Why is it strictly prohibited to turn on the gas burner directly in a furnace with high temperature after an emergency shutdown? A reference ** will be shown after responding; scoring is achieved by answering the key points. If the furnace is started up immediately after an emergency shutdown, the temperature inside the furnace has not yet cooled down, which may create conditions for a flash explosion. Introducing gas to start the furnace suddenly could lead to an explosion due to the high temperature inside the furnace; therefore, after an emergency shutdown, fire-suppression steam must be used for cooling, and the procedures must be followed step by step. 2016 Q&A Summary Post (updated as of November~~~~) http://bbs.hcbbs.com/thread-1597792-1-1.html Seeking sponsors for the “2016 Haichuan Top 10 Members Selection Contest” http://bbs.hcbbs.com/thread-1628108-1-1.html (Source: Haichuan Chemicals Forum)
Explosions can occur in environments with gas
If the furnace is started up immediately after an emergency shutdown, the temperature inside the furnace has not yet cooled down, which may create conditions for a flash explosion. Introducing gas to start the furnace suddenly could lead to an explosion due to the high temperature inside the furnace; therefore, after an emergency shutdown, fire-suppression steam must be used for cooling, and the procedures must be followed step by step.
If the furnace is started up immediately after an emergency shutdown, the temperature inside the furnace has not yet cooled down, which may create conditions for a flash explosion. Introducing gas to start the furnace suddenly could lead to an explosion due to the high temperature inside the furnace; therefore, after an emergency shutdown, fire-suppression steam must be used for cooling, and the procedures must be followed step by step
The furnace temperature is too high; if gas enters and reaches its explosive limit, a flash explosion can occur.
When a high-temperature furnace chamber comes into contact with gas, a flash explosion is likely to occur inside the chamber
Flammable gases can undergo deflagration, affecting the normal operation of equipment