The operating temperature of the liquid separation tank at the inlet of the cyclic hydrogen compressor is 50 degrees; why is the design temperature 150 degrees?
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The operating temperature of the liquid separation tank at the inlet of the cyclic hydrogen compressor is 50 degrees; why is the design temperature 150 degrees?
If the temperature of the cold high-pressure stream is too high, liquid carried in the gas will be significant, which will cause the liquid separation tank at the inlet of the recycle hydrogen compressor to fill up or even show an overestimated level. This will have a direct impact on the recycle hydrogen compressor. If the compressor is not affected by liquid in the gas, then it is entirely possible to eliminate the liquid separation tank at its inlet. At the high speeds at which the recycle hydrogen compressor operates, significant amounts of liquid in the gas can cause serious damage to the equipment. The consequences of damage and leakage in the hydrogen system’s equipment are self-evident
Therefore, the operating temperature is generally below 50, while the design temperature takes into account a certain margin and various operating conditions of the process
1. Safety margins in pressure vessel design. 2. Abnormal operating conditions, such as high-pressure air cooling failures, imbalances in heat exchange between reaction gases and fluids, and excessive temperature rises, can all lead to an increase in the temperature of the medium flowing downstream. 3. A design temperature that is higher than the normal operating temperature does not mean that the normal operating temperature can be brought close to the design temperature. The design temperature is intended to protect the hardware, rather than meeting process requirements
This is the highest process alarm value/danger value that can theoretically be tolerated when the facility is not operating properly.
The design temperature is 150°C; consider short circuits and anti-stall measures, and you’ll understand
Has the hydrogen from downstream returned to the liquid separation tank? Is there a cooler in the reflux bypass?
What needs to be considered is that under full-load operation followed by unload conditions, when the anti-surge valve is fully opened back to the inlet, the temperature will be above 50 degrees