The diesel hydrogenation light gas is combined with hydrogen in a buffer tank; after the reactor has been in operation for about 20 days, the high-pressure difference increases from 0.4 MPA to 1.0 MPA
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The hydrogen content in the diesel hydrogenation light gas is around 85–90%; this light gas is combined with the hydrogen in the hydrogen buffer as a source of hydrogen. After operating for about 20 days, the pressure difference from the reactor outlet to the high-pressure side increased from 0.4 MPA to 1.0 MPA, and this increase occurred gradually. The measures currently taken are to increase the volume of water used in the first injection phase in order to flush the reactor and air coolers, but the effect is not significant. Have similar systems encountered an increase in pressure difference across the heat exchangers when using low-grade gas as a hydrogen source?
It’s not necessarily due to low pressure; could it be that the temperature of the high-pressure heat exchanger at the reactor outlet is too low? Which are the various locations where water is injected?
Run it with pre-fill water for a while! Note: It will definitely be solved! ! !
The measures currently taken are to increase the amount of water used in the first injection in order to flush the reactor and the air coolers. Is what the original poster is saying a bit off? Can the reactor be flushed? Increasing the water injection volume is the only solution; the first point you mentioned regarding water injection must refer to pre-replacement water injection, right? Due to the complex crystal formation position before the replacement, there won’t be much change in a short period of time; it’s important to monitor the trends – the issue will be resolved in a few days, and it definitely will be solved! If it cannot be restored to its original state, then when operations have to be halted, chemical cleaning of the Gao Huan system will need to be considered
What is the pressure stress associated with low scores, and can one enter the hydrogen buffer tank directly?
Has Gao Huan ever used a secondary route? If the flow rate is too low, scaling will occur, increasing the pressure drop. There are also changes in the raw materials; could it be that the high chlorine content is causing the crystallization point to shift earlier? It is recommended to try switching the water injection point to the high-pressure side; it should have little to do with low pressure in the gas stream.
Has Gao Huan ever used a secondary route? If the flow rate is too low, scaling will occur, increasing the pressure drop. There are also changes in the raw materials; could it be that the high chlorine content is causing the crystallization point to shift earlier? It is recommended to try switching the water injection point to the high-pressure side; it should have little to do with low pressure in the gas stream.
Check whether the purity of the recycled hydrogen has decreased too much, as a decrease in purity leads to an increase in pressure drop.
After low-hydrogen hydrogen is incorporated into the hydrogen buffer tank, does the composition of the circulating hydrogen change? It would be possible to find out whether the hydrogen sulfide content increases or if there are other changes
After low-purity hydrogen is introduced into the hydrogen buffer tank, does the composition of the circulating hydrogen change? It would be possible to conduct tests to determine whether there is an increase in hydrogen sulfide levels or in the amounts of other substances. When the pressure difference is high, substances are definitely formed