Methanol reciprocating cycle machine with alcohol
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The methanol circulator in our plant is of the piston type, and liquid methanol is present in the buffer tank at the inlet of the circulator. Could everyone please help analyze this situation? The system pressure is 4.5 MPa, and the circulation rate to the tower is 350,000 standard cubic meters per hour.
To determine whether the amount discharged is high or not, it is recommended to check the separator; there might be a problem with the demister.
With four cylinders, there is over 500 ml per day; if the discharge occurs more frequently, the amount will be even higher, which may have some impact on the valves
Drain the liquid from the inlet buffer tank; keep the level in the separator at a lower value to ensure proper control of its level. The compressor may require frequent maintenance, so it’s necessary to have sufficient spare parts on hand
Yes, valve maintenance for circulation pumps is done frequently
The following are personal opinions for reference only: When did the problem arise, and has it always been like this?» ? Or? ? If this situation persists, it might be advisable to lower the temperature control at the loop crude methanol separator as well as the liquid level control. If the process parameters have not changed and this problem has only appeared recently, then it might be worth considering whether the demisting screen in the methanol separation tank has come loose, which could lead to a poor gas-liquid separation effect
It is highly likely that the low demisting efficiency of the upstream methanol separator is the cause of liquid presence at the inlet of the circulation compressor. Especially when traditional mesh-type demister internals are used in methanol separators, their low operational flexibility, susceptibility to clogging and corrosion, high pressure drop, and low efficiency often result in suboptimal separation performance. The use of high-efficiency vane-type methanol separation internals to replace traditional mesh or filter-type demisting separation internals has become a major trend in recent years. For the internal components of methanol separators used in internationally renowned methanol synthesis process packages such as those from David, Luchi, Topsoe, and Cassali, vane-type high-efficiency inulin separators have been designated and recommended for use. For technical information on the feather-leaf type high-efficiency methanol separator, please visit http://bbs.hcbbs.com/thread-1354813-1-1.html for details.