Problems with furnace steam pressure control in synthetic ammonia gas production section
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Our factory uses a gap-type semi-water gas production method. One buffer tank has five furnaces, and a regulating valve is installed in front of the buffer tank. One disadvantage of this structure is that when the regulating valve fails, all five furnaces will stop. I wonder if there is a better structure or solution to avoid all shutdowns? I hope everyone can talk about it
I think there is a problem with the design. The valve is installed after the buffer tank. The main pipeline entering the furnace in our factory has two shut-off valves. The exhaust gas entering the furnace valve that goes to the flare is installed after the buffer tank.
Yes, one is to install it after the buffer tank, and the other is to install a bypass. The problem mentioned by the original poster should not occur.
Our factory uses two regulating butterfly valves in parallel. What structure of valve do you use?
We use a pressure self-regulating valve to control the steam pressure entering the furnace, which has fewer failures.
In order to ensure the stability of the steam pressure entering the furnace, in addition to the control of the self-regulating valve, the steam auxiliary line should also be appropriately opened. When the steam pressure self-regulating valve fails, there will still be steam entering the furnace. . .