Low-temperature methanol wash feeder cooler
Thread Content
There is a pipe at the bottom of the LMMO feeder cooler that is connected to a separation tank located further downstream; should a valve be installed on this pipe?
The pipe should be designed to separate gas from water; it seems better not to use valves.
Add a valve for maintenance isolation, which is kept locked open normally.
Reply to 2# tjscyxb: If I want to direct the liquid from the separator to the V-8, what if there’s no pipe for that purpose? Will that have any impact?
Reply to 3# wgonline: Is yours set to full? Is it necessary to adjust this valve on a regular basis?
With a valve, it's better to discharge at regular intervals.
There is no impact during discharge; the feeder cooler is positioned higher than the separator, while the gas phase pressure is the same as that in the separation tank. As long as there is a liquid level in the separator, a connector will be formed and this drain pipe will not remain empty; this has no impact on draining from the V8. A valve is added solely for the convenience of maintenance.
I think the person on the sixth floor is right; a valve should be installed to allow for intermittent opening. The purpose is to prevent backflow. Isn’t it all about saving energy and reducing consumption these days? If your plant still has sulfur recovery, keeping this valve fully open will affect the purity of the acidic gas.
If I’m not mistaken, what the original poster is referring to is a pipeline located beneath the raw gas cooler in the low-pressure section; this pipeline leads to the liquid phase outlet at the bottom of the V1 separation tank before it reaches the methanol washing tower. In our design, there are no valves on this pipeline. First and foremost, we would consider adding valves only if the V1 tank needed to be repaired. But in fact, whether there are valves or not isn’t a problem – two 600lb flanges along with one valve will suffice. How many times has V1 tank been overhauled? This pipeline is primarily used to introduce feed gas during normal production, spray methanol to separate it, and transfer the resulting liquid phase to the separation tank; the design team must have taken this into account as well. It won’t have a significant impact. Personal opinion