(Daily Question) Coal-to-Oil and Olefins Forum, April 20, 2018
Thread Content
3.jpg Participation: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Question: (DMTO) Olefin separation unit: When is it appropriate to introduce the turbine seal steam? Due to the low temperature of the machine, introducing sealed steam too early can lead to excessively high local temperatures in the sealing chamber, causing the shafts exposed to such heat to bend; it is generally better to introduce the steam 20 minutes after the machine has been warmed up or before increasing its speed. Introducing sealed steam too early will cause the exhaust temperature to rise too rapidly. Note: The answer will be announced automatically in two days!
Supply shaft seal steam after the condensing turbine is started up and before vacuuming the condenser.
After the oil system is established and the shaft is turned, before vacuuming is performed
After the oil system is established and the shaft is turned, before vacuuming is performed
When the drum pressure drops to 0.1 MPA above the pressure in the high-pressure steam main, the steam generated in the drum is directed into the high-pressure steam main.
After the oil system is established and the crankshaft is turned, before vacuuming.
Due to the low temperature of the machine, introducing sealed steam too early can lead to excessively high local temperatures in the sealing chamber, causing the shafts exposed to such heat to bend; it is generally better to introduce the steam 20 minutes after the machine has been warmed up or before increasing its speed. Introducing sealed steam too early will cause the exhaust temperature to rise too rapidly.
After the oil system is established and the crankshaft is turned, before vacuuming.
After the turning gear is operating normally, apply steam sealing.
Answer: Since the machine temperature is low, introducing sealed steam too early can lead to excessively high local temperatures in the sealing chamber, which may cause the shafts exposed to such heat to bend. It is generally better to introduce the steam 20 minutes after the machine has been warmed up or before increasing its speed. Introducing sealed steam too early will cause the exhaust temperature to rise too rapidly.
Due to the low temperature of the machine, introducing sealing steam too early can lead to high local temperatures in the sealing chamber, causing the shafts in those areas to bend; it is generally better to introduce the steam 20 minutes after the machine has been warmed up or before increasing its speed. Introducing sealed steam too early will cause the exhaust steam temperature to rise too rapidly. Supply is stopped when the compressor is operating normally or after the speed controller activates.