Sudden drop in pressure in the hydrocracking system
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What impact does a sudden drop in pressure in the hydrocracking system have on the equipment?
“What impact does a sudden drop in pressure in the hydrocracking system have on the equipment? ”The question is confusing and unanswerable—the reason for the sudden drop in pressure is unclear ； It’s unclear by how much it has dropped!
First, the reasons for the sudden pressure drop are as follows: 1. The safety valve at the compressor outlet may have activated; 2. The high-pressure safety valve may have activated; 3. Backpressure in the high-pressure section; 4. Power outage leading to emergency venting; 5. Operator error resulting in pressure release; 6. Leakage due to ruptured system pipes. The damages caused are as follows: 1. Due to the rapid pressure drop, the pressure drop across the reactor bed increases, and this excessive pressure drop can cause the bed to collapse; 2. Rapid pressure release leads to a sudden increase in the level of liquid in the high-pressure section, and this liquid can damage the compressor; 3. Pressure release causes a large amount of light oil to be sent to the flare system, and the sudden drop in system pressure results in compressor surging; 4. The sudden pressure drop increases the hydrogen circulation rate, posing a risk of overheating in the heater and reactor
You are referring to the impact on the reactor, right? During a normal shutdown, the pressure reduction rate of the system should not be too fast; otherwise, it can lead to delamination of the surfacing layer and cracks in the reactor. These are the basic operational requirements for hydrogenation reactors.