Control of the outlet temperature of the converter during hydrogen production shutdown
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Before stopping the steam supply for hydrogen production, it is necessary to isolate the medium-pressure reactor, and the temperature at the inlet of the conversion furnace is controlled at 420 degrees. Why then is it required to maintain the temperature at the outlet of the conversion furnace between 620 and 650 degrees? Is this to prevent the conversion furnace from overheating, to avoid sintering of the conversion catalyst or damage to the furnace tubes, or is there some other reason? I seek an expert’s explanation
Personally, I think your answer is quite thorough!
Why must the medium-voltage reactor be removed?
Before stopping the gas supply, the medium-temperature converter must be removed; otherwise, it will cause excessive reduction of the medium-temperature catalyst!
The feed gas had already been cut off before the gas supply was stopped; where could the hydrogen for reduction come from?
There is hydrogen in the circulating gas; increase the circulation rate
In that case, your hydrodesulfurization unit also needs to be removed, otherwise methanation reactions will occur
Yes! At that time, the reactor and desulfurization system had been shut down
Question: Are your compressors centrifugal or reciprocating? If it is a centrifuge, have you encountered any instability in its operation when increasing the circulation rate?
Our compressors are two reciprocating compressors that operate with oil-free lubrication; one is in use while the other serves as a backup. In our factory, aside from the hydrogen circulation compressor driven by a turbine which is of the centrifugal type, all the compressors used in other equipment are reciprocating types
I haven’t considered everything; I look forward to your guidance