[Q&A Question 044] 2017.02.13
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This post was last edited by 955559 on 2017-7-21 21:54. [Q&A Question No. 044] 2017.02.13: What are the hazards of a high 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.) ) A high liquid level results in reduced separation space at the top of the unit, which makes it easier for the circulating hydrogen to carry liquids or solids, thereby damaging the hydrogen circulation compressor (already corrected). Petrochemical Section – “Creative Ideas for Energy Saving” campaign: http://bbs.hcbbs.com/thread-1666758-1-1.html The New Normal Cup – Voting for the top 10 members of HaiChuan in 2016; vote for the member you care most about (please cast your valuable vote for the members in the Petrochemical Section): http://bbs.hcbbs.com/thread-1667649-1-1.html Summary thread of Q&A questions for 2017 (updates available): http://bbs.hcbbs.com/thread-1657793-1-1.html Summary thread of daily questions for 2017 (updates available): http://bbs.hcbbs.com/thread-1657794-1-1.html Summary thread of Q&A questions from 2016 (updates completed): http://bbs.hcbbs.com/thread-1597792-1-1.html Third-phase selection of outstanding management members of HaiChuan: http://bbs.hcbbs.com/thread-1655902-1-1.html Petrochemical Section – “Creative Ideas for Energy Saving” campaign: http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones are available for grabs. Thread for collecting chemical engineering technical materials in the Petrochemical Section: http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes are waiting for you (Source: HaiChuan Chemical Forum)
The high liquid level results in reduced separation space at the top of the high-pressure section, allowing the circulating hydrogen to carry liquid, which is detrimental to the operation of the circulating hydrogen compressor.
A high liquid level results in reduced separation space at the top of the high-pressure section, allowing the circulating hydrogen to carry liquid with it and thus damaging the circulating hydrogen compressor.
The tank is filled to high levels, with severe liquid carryover in the recycled hydrogen; as a result, the separation efficiency of the recycled hydrogen liquid separation tank declines, and the oil carried over in the recycled hydrogen even reaches the compressor, thereby damaging it.
When the hot high-pressure liquid level is too high, the following hazards occur: 1. When the hot high-pressure liquid is at an excessive level, the liquid level in the cold high-pressure separator also rises significantly. The liquid volume in the separator at the hydrogen circulation inlet will be high; in severe cases, liquid will enter the compressor, causing damage to it. It may also lead to increased resistance in the reactor bed, resulting in very poor reaction efficiency. 2. An increase in the thermal high-vapor phase resistance may cause the safety valve to activate, which is very unsafe. 3. Excessive oil in the gas phase, short residence time, resulting in poor oil-water separation at low and high temperatures.
This reduces the separation space at the high-pressure top, allowing the recycled hydrogen to carry liquids or solids and thus damaging the new hydrogen compressor.
A full hot high-pressure tank will carry oil to the cold high pressure section. If not dealt with in a timely manner, it may continue to be carried over to the subsequent cyclic hydrogen separation tank
The liquid carryover in the circulating hydrogen is severe, which reduces the separation efficiency of the circulating hydrogen liquid separator; as a result, the circulating hydrogen tends to contain liquids or solids, thereby damaging the compressor.
The circulation hydrogen contains a high amount of liquid, which reduces the separation efficiency of the circulation hydrogen liquid separation tank; the oil present in the circulation hydrogen even makes its way into the compressor, thereby damaging it
The overflow increases, and the liquid can easily flow into the flue, damaging the induced draft fan