Low wash operation issue
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The shell side of the coiled heat exchanger is blocked – how to deal with it? How to deal with black particles in the methanol system?
Enhance filtering. Clean the coiled tube heat exchanger during the shutdown period!
The shell side of the coiled heat exchanger is blocked, so it needs to be shut down for cleaning. There are black particles in the methanol system; analyze to find out what these black particles are No. If the particles are large, add more filters; if they are small, check and increase the water washing capacity of the preceding process
The coil-type heat exchanger is clogged, but it does not affect production and can continue to operate; otherwise, it will need to be shut down for cleaning. Strengthening filtration during operation is key.
It might be that the system is quite dirty at first; it will get better after some time
Check whether the amount of methanol sprayed reaches the maximum designed level; see if there is too much condensate in the feed gas that has not been separated by the preceding separators. Examine whether the temperature difference at the end faces of the coil-type heat exchanger is too large. If there is a blockage, reduce the amount used; if production cannot be maintained, the equipment must be shut down for cleaning
A clogged heat exchanger reduces heat exchange efficiency, directly affecting the system load. Are the black particles the catalyst powder and ash brought in by the transformation belt? This is generally more common when the unit is first started up; it’s less likely to occur under normal operation of the low-temperature methanol wash process. What kind of filtration process do you use? Linde typically installs two filters, one with a 50um rating and another with a 250um rating. The filter located at the lower part of the regeneration tower needs to be cleaned more frequently, usually about once a month……
If the blockage isn’t severe, you can inflate with nitrogen to see how it works
What does nitrogen inflation involve, bro?
Introducing nitrogen into the inside to create turbulence may loosen the blockage.
This should be done while the unit is parked, right? Is it through the bottom drain of the heat exchanger? How can the interior of the heat exchanger be filled with liquid?