There is water in the dry gas sealed pipeline (about 30% crude methanol)
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As title. That's where the water comes from. Could it be brought about by the synthesis section?
The compressor shaft seal leaked, causing high-pressure wet gas containing methanol to enter the dry gas, resulting in the situation mentioned by the original poster.
What level of dry gas sealing are you talking about? The primary seal is process gas. If there is 30% crude methanol, it means that the methanol separator is not effective. It is brought into the primary seal pipeline and may remain in the pipeline after cooling. Is your dry gas sealing system damaged?
The dry gas seal primary buffer gas is a process gas. If the process gas contains water or methanol, liquid will be deposited in a certain section of pipeline in front of the primary buffer gas filter. It may be that the dry gas seal pipe has a U-shaped bend or a cecum. Or the methanol separator is not very effective and the circulating gas carries too much liquid. This is purely speculation, please give me some advice.
First of all, there is methanol in the sealed cavity, which means that the separation effect of the separator at the inlet of the circulation machine is not good, and we should find a way to deal with it. Secondly, consider adding insulation and separators to the primary buffer gas pipeline. Finally, please be careful when operating the compressor, start and stop it, to prevent circulating air from entering the sealed cavity. Before driving or after parking, purge and replace with nitrogen for a period of time. This post was last edited by FEIJING on 2009-3-5 11:28 ]
To add, if the heat exchange of the synthetic water cooler is not good, the separation effect of the separator will not be so good. There is liquid in the circulating gas. If the seal leaks, water and methanol will be present.
ah. I am from Qitaihe. Tiedong's.
Dry gas seal failure. The manufacturer comes. The non-drive end dry gas seal was replaced. It is said that it costs 250,000 yuan.
This shows that the methanol separator is not effective
You can contact the manufacturer to repair the replaced dry gas seal as a spare part. It is strictly forbidden to bring water or other liquids into the dry gas seal. Be careful not to use circulating gas as the sealing gas for dry gas seals. When the compressor is not at full load, control the liquid level of the separator to ensure that there is no methanol in the outlet gas and circulating gas.
1. After the circulation machine is pressurized, a small amount of methanol will be condensed through the cooler and needs to be separated. 2. There will be a small amount of methanol water in the process gas of the dry gas seal. If it is not discharged in time when starting and stopping, the dry gas seal will be damaged.
The primary seal of the dry gas seal is generally equipped with steam tracing, which is to prevent liquid from entering the dry gas seal.
May I ask what is the reason why the first-stage exhaust flow rate at the high-pressure end of the dry gas sealed high-pressure cylinder reaches the alarm level?
The water problem is serious! It will damage the compressor!
It should be the methanol brought by the circulating gas! ! ! You can open the pouring of the first-level sealed inlet filter slightly! ! !
The poster asked where the water comes from? I think since the analyzed water contains methanol, and the content is not low, this has already explained the problem. I think the most important thing to consider is the problem of the separator, that is, the components of the circulating gas need to be looked at.
The methanol separator is not working well. Our company has had this problem before, but it was solved later.