Emergency shutdown of the hydrogenation unit

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Please help to take a look and provide guidance on this issue: Severe fluctuations in system pressure and temperature or leaks. Causes: External factors or the need to shut down the system urgently to handle an accident, in order to ensure safety. Precautions: Personal protection: Wear appropriate protective equipment and be proficient in using fire-fighting equipment； 2. Use of emergency rescue equipment: Use explosion-proof and anti-static tools, as well as copper F wrenches ； Proficient in using fire-fighting equipment such as fire hydrants and fire monitors ； Accident risk analysis: 1. Potential types of accidents that may occur: poisoning and asphyxiation, fire ； 2. Voltage surging accidents may occur. 3. Leaks may arise from the flanges of various stationary equipment, or from the pipelines attached to moving equipment ； 4. There are alarms on the DCS screen from the on-site combustible gas detectors, and the presence of a smell similar to rotten eggs in the area poses a risk of poisoning for people. 1. Notify the department dispatcher and the shift staff in the workshop. 2. Inform the workshop supervisor. Shut down the cyclohydrogen compressor; the system underwent emergency pressure relief, and fire extinguishers were used. Stop new hydrogen supply and feed intake; activate new hydrogen pressure control; shut down the three return streams and one stream. Close the high-pressure series low-pressure control valve. Close the high-pressure to low-pressure manual valve to prevent pressure crossover. Close the fuel gas manual valve. Close the pump outlet valve, and after the pressure drops, replace it with nitrogen.