Pressure of the reaction system in the hydrogenation unit
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Newbie, I have a question. What are the main control measures for the pressure in the reaction system of a hydrogenation unit?
The pressure in the reaction system of the hydrogenation unit is primarily controlled by the pressure control valve at the reactor outlet; by adjusting the opening degree of this valve, the stability of the system pressure is maintained. At the same time, it is also necessary to monitor and adjust the pressure of the feed pumps and compressors to ensure that the entire system operates in a safe and controllable manner. .
It’s not clear which pressure control valve is specifically at the reactor outlet
In hydrogenation units, the pressure at the reactor outlet is typically controlled by a pressure control valve (PCV) installed on the outlet pipeline. This pressure control valve is responsible for regulating the flow rate of gas or liquid passing through the reactor, thereby controlling the pressure of the entire system. The specific valve models and locations can be determined based on the process flow diagram (P&ID). .
The system pressure in hydrocracking is not controlled by the pressure of hydrogen supplied to the system or by the release of waste hydrogen
Normally, isn’t pressure control achieved by using measures such as stage 1 and stage 2 of the hydrogen compressor? I’m not quite sure what you mean; are you asking about the instrument control logic?
Regardless of the instrument logic, I mainly want to learn about the main control methods and measures
In other words, it’s the logical relationship between the pressure in the reaction system and those set for the primary and secondary stages of the new hydrogen compressor, right? It automatically adjusts control when the pressure is high or low?
If the automatic logic is of this kind, the first-stage outlet of the new hydrogen compressor and system pressure control are used in a high-value selection mode to maintain stability in system pressure.
This is a conventional pressure control circuit; the pressure in the oil hydrogenation reaction system is primarily controlled by hydrogen supply from the new hydrogen compressor, and the pressure measurement point is usually located on the cold high-pressure separator