[Q&A Question 049] 2017.02.18
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This post was last edited by 955559 on 2017-7-21 21:56. [Q&A Question No. 049] 2017.02.18: What are the hazards of an excessively low high-level liquid level? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) If the high-level liquid surface is too low, gas can be entrained downstream due to insufficient liquid sealing, resulting in pressure fluctuations in the low-pressure section or even overpressure. Petrochemical Area – “Creative Ideas for Energy Saving” event: http://bbs.hcbbs.com/thread-1666758-1-1.html The New Normal Cup – Voting for the top 10 members of HaiChuan in 2016 is now underway; vote for the member you like the most (please cast your valuable vote for the members in the Petrochemical Area). http://bbs.hcbbs.com/thread-1667649-1-1.html Summary post of Q&A questions for 2017 (updates available now). http://bbs.hcbbs.com/thread-1657793-1-1.html Summary post of daily questions for 2017 (updates available now). http://bbs.hcbbs.com/thread-1657794-1-1.html Summary post of Q&A questions from 2016 (all updates completed). http://bbs.hcbbs.com/thread-1597792-1-1.html Third round of selection for outstanding management members of HaiChuan. http://bbs.hcbbs.com/thread-1655902-1-1.html Petrochemical Area – “Creative Ideas for Energy Saving” event: http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones are up for grabs. Summary post collecting chemical industry technical materials from the “Petrochemical Section”. http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes are waiting for you (Source: HaiChuan Chemical Forum)
An excessively low level of the hot high-pressure fraction can lead to overpressure in the hot low-pressure fraction, as well as loss of feed gas.
Gas is entrained into the lower pressure section, causing fluctuations in its pressure
When the level of the high-pressure liquid is too low, gas can be entrained downstream due to insufficient liquid sealing, resulting in pressure fluctuations in the low-pressure section or even overpressure; additionally, an excessively low level may lead to pressure surges that cause explosions in the low-pressure section
1. High-voltage series low-voltage accident. 2. Increase the loss of dissolved hydrogen. 3. It affects the accuracy of the boundary level. 4. The air volume at low scores increases.
There is a boundary between high-pressure and low-pressure separators. If the liquid level in the high-pressure separator is too high, it poses a risk to the safety of the cycle hydrogen compressor; if it is too low, pressure leakage can occur leading to an explosion in the low-pressure separator. Therefore, the liquid level in the high-pressure separator is a very important control parameter. For safety reasons, high-level alarms and low-low level safety interlocks, as well as high-level alarms and over-level safety interlock systems, are usually installed.
Reduce the reaction space, causing severe damage to the equipment
If it is too low, backpressure can occur, leading to an explosion at low pressures