Restructure low-flow line
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In the reformed hydrogen generator with a four-in-one furnace, feeding is interlocked and stopped; the booster pump remains in operation. At this time, the pressure in the reformed product separation tank is 0.17 MPa. When the low-flow line is activated, the flow rate is at most 6500; will this be sufficient to circulate the oil inside the plate heat exchanger?
The purpose of setting a minimum flow line should be to allow the heat exchanger to warm up and cool down evenly, thereby preventing leaks caused by sudden temperature changes.
Well, yes, but if there is oil stored in the plate exchanger, will the gas flowing at a low rate be able to drive it?
Why drive oil storage? The purpose of this wire isn’t to carry oil, right?
But there is oil inside the plate exchanger; can the gas in the low-flow line flow through?
If there is concern about oil remaining in the plate heat exchanger, it can be removed using a ribbon cable. The main purpose of the minimum flow rate is to protect the heat exchangers and reactors, preventing excessive temperature fluctuations; carrying oil is not the primary goal ； With such a low flow rate, it shouldn’t be possible to transport oil
During the interlock shutdown of the hydrogen generator, could the oil from the heat exchanger backflow into the inlet and outlet pipelines of the hydrogen generator?
Here, we experienced an instance of backflow, which caused the cyclic hydrogen compressor to fail to start – it immediately reached overload conditions; things improved once the backflow was resolved
Whether it is an emergency shutdown or a normal shutdown, plate heat exchanger operation and oil drainage from various low points are among the key operational aspects.
This post was last edited by Refiner on 2017-11-1 08:33. Its main function is to maintain pressure and prevent excessive differential pressure between the plates and shells, which could damage the heat exchanger.