I would like to ask which signals need to be controlled for the compressor in terms of manufacturing processes
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In hydrogenation, the two important compressors are the recycled hydrogen compressor and the fresh hydrogen compressor. What process flow signals are used to control the flow rate of these two compressors?
I’m not entirely sure about the meaning of this question, so here’s a tentative attempt to address it: A new hydrogen compressor is used to supply hydrogen to the system, and it adjusts the size of the return line based on the system pressure in order to maintain stable pressure throughout the system. The flow rate of recycled hydrogen is primarily controlled based on the hydrogen-to-oil ratio set for the reaction, but since this ratio is calculated using pure hydrogen, certain requirements are placed on the purity of hydrogen as well. Quench hydrogen is separated from the circulating hydrogen outlet, and its flow rate is controlled based on the bed temperature rise. There are also circulating hydrogen bypasses, purge hydrogen, etc., which need to be controlled based on the conditions of the plant and its operating status.
New hydrogen compressors are generally pressure-controlled, with signals taken from the inlet and outlet pressures of each stage as well as the system pressure. Turbine inlet flow rate, compression ratio, and some dimensionless quantities