Principle issues of the high-pressure drum in the pyrolyzer
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The ultra-high pressure steam drum of the pyrolysis furnace is located above the waste heat boiler; boiler feed water continuously passes through the waste heat boiler by siphon action to exchange heat with the high-temperature pyrolysis gases, thereby generating steam. This answer is wrong; I don’t understand where the mistake lies. Was it the siphon that was changed to a thermosiphon? No problems can be seen in other areas; I hope experts can help answer this question. Thank you.
Water flows downward due to gravity, while steam rises upward; it has nothing to do with siphoning
In the question, the boiler feed water enters the drum via a waste heat boiler; obviously, it is not due to thermosiphon effect； In a waste heat boiler that utilizes thermosiphon effect, water must come from the boiler; thus, in this type of boiler, circulation occurs due to the difference in density, and this is based on the principle of thermosiphon. It is necessary to clarify which type of waste heat boiler it is; pyrolysis gas waste heat boilers usually have 2-3 of them. Generally, the first two rely on a thermosiphon cycle, while the third is just an ordinary heating boiler, similar to a hot water boiler; I’m not sure if the original poster understands this.