Regarding the start-up pressure difference of the membrane recovery system
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Before being put into operation, a pressure difference of greater than 3.5 MPa between the purge gas and the product hydrogen is required for the membrane recovery system to be enabled. What is the purpose of setting this differential pressure activation condition? At partial load, the pressure difference between the inlet and outlet of the compressor is not high (although it’s not high, there is still a pressure difference of around 1.5–2.0). Does that mean the membrane recovery system cannot be used? What impact does forcing this startup condition to occur have on the membrane?
This pressure difference start condition is set to ensure that the membrane recovery system can effectively separate gases. If the pressure difference is insufficient, the separation efficiency of the membrane will decrease, failing to achieve the desired recovery results. At partial load, if the pressure difference between the inlet and outlet of the compressor is below 3.5 MPa, it may indeed prevent the membrane recovery system from being activated. Forcing the membrane recovery unit to operate under a low pressure difference may cause damage to the membrane or reduce its service life, and it will also affect the gas recovery rate. .
It is recommended to understand the working principle and operational condition requirements of the \"membrane\", as there is usually a range of applicable conditions. For reference.