Questions about acetylene pipeline flame arrester
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Dear colleagues, my unit's VCM device has a corrugated flame arrester on the acetylene main pipe before the mixer. This flame arrester is often blocked and the pressure difference increases. I cannot analyze what is blocking it. I wonder if anyone has encountered this phenomenon. Please help me. Thank you!
Is the process you use sub-sodium cleaning? Are there coolers and mist eliminators behind the alkali washing tower? If so, consider adding Monmog’s mist removal filter element between the cooler and the flame arrester of the alkali scrubber. If the water is drained in time, there will be no problem.
In this sodium purification process, there is a demister wrapped with fluorosilicone oil-impregnated glass wool behind the low-temperature water cooler. There is not much pressure difference between the front and rear of the demister, but the pressure difference will rise after a period of time on the flame arrester. Is it not possible to use this kind of corrugated plate flame arrester for acetylene pipelines? Should there be a gravel flame arrester?
The main reason is that the water and salt contained in the acetylene gas crystallize and precipitate in the flame arrester. Although the fluorine-silicon oil cotton demister has no pressure difference, it should be replaced at least once every six months. There is not much difference between corrugated packing and gravel. Gravel is more seriously blocked by salt due to its tight structure.
Some companies do not add flame arresters to the acetylene main pipe. How about you?
At least I have never seen an acetylene pipeline in a calcium carbide VCM production unit without a flame arrester.
You can consider replacing the flame arrester with sand sealing, but the most important thing is to solve the problem of what substances are entrained in the acetylene gas and why are they entrained?