What are some good solutions for the vibration in the regular blowdown line of the steam drum in the steam generation system?
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During the regular drainage of the drum in our plant’s steam generation system, water hammer occurs in the pipes, resulting in severe vibration. Do you have any good suggestions or methods? Please share them.
The steam pipeline was put into operation from a cold standby state; insufficient warming of the pipeline occurred due to the valves controlling the steam flow being opened too quickly or to an excessive extent； Or when the pipeline drain valve is not turned on and the drain pipe is blocked, water hammer is more likely to occur in the pipeline. After the steam pipeline in operation is shut down, the corresponding drain valves are not activated in a timely manner or are not opened enough. With the associated steam inlet valves not being closed properly, the steam that leaks into the shut-down pipeline gradually cools down and turns into water, which then accumulates within the pipeline. After a certain period of time, water hammer occurs in the pipeline. The thermal pipeline design codes specify that steam traps and drain pipes should be considered for dead ends of pipelines that are not in frequent use, as well as for the lowest points along the pipeline sections. Appropriate handling methods and preventive measures should be taken when such situations occur in practice: (1) In the event of water hammer during the operation of the pipeline, the steam inlet valve can be reduced or closed to control the pipe warming rate appropriately, and the steam pipeline drain valve should be opened promptly. If the drain pipe is blocked and the exposed part does not feel hot to the touch, it should be tapped repeatedly; if necessary, it should be replaced. (2) When water hammer occurs in the steam pipeline after it is taken out of service, it is necessary to first check whether the relevant steam inlet valves are properly closed, and secondly to check whether the drain valves of the pipeline that is no longer in use are open. If they are not open, they should be opened slowly and promptly. When a drain main system is in use, care must be taken to prevent the drain main from being under pressure, so as to avoid steam from other pipelines entering the disabled steam pipeline through the drain pipes, which could exacerbate the water hammer phenomenon in that pipeline.
Reply to 2# zgj2405: Do steam traps also need to be installed on pipes for regular sewage discharge?