What are the effects of excessively high or low temperature of the conversion gas at the gas shift outlet on the low-temperature methanol washing unit? How should it be adjusted?
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What are the effects of excessively high or low temperature of the conversion gas at the gas shift outlet on the low-temperature methanol washing unit? How should it be adjusted?
The high temperature of the transformed gas leads to an increased amount of water entering the low-temperature methanol wash; it is therefore necessary to increase the amount of methanol sprayed, while also raising the load on the methanol-water separation tower, in order to maintain the appropriate water content level in the lean methanol； Corrosion in the feed gas pipeline leading to the low-temperature methanol wash unit may worsen; it is necessary to identify the reasons for the high temperature of the shift gas and address them promptly. Additionally, attention should be paid to the heating of the feed gas pipeline, especially during shutdowns when condensation water may form, to prevent freezing.
Excessively high temperatures will cause the temperature of the process gas entering the scrubber to be high. Reduce the temperature of the washing water in the ammonia scrubber and restore the temperature of the shift gas to normal.
The actual outcome is that it has no noticeable impact on several books
How is it possible not to notice this? An increase in the liquid level in the methanol gas-liquid separator, or an increase in the steam consumption of the methanol-water separation tower, will lead to an increase in the temperature at the inlet of the methanol washing tower
The task of making this adjustment is changing; are you thinking of lowering the washing level? ?
High temperature of the transformed gas: more water content leads to increased heat loss, poorer ammonia washing efficiency, and heightened corrosion. The temperature of the transformed gas is low: this makes freezing more likely, which can cause blockages in the heat exchangers. However, the ammonia washing effect improves, the amount of water carried is reduced, and corrosion is diminished. Fluctuations in the temperature of the transformed gas: The equipment is damaged due to significant temperature changes resulting from adjustments
The term \"system\" is too one-sided; in both the Linde process and the Lurgi process, the converted gas is cooled in a heat exchanger, after which a separator is used to remove water or methanol-water mixtures.
In actual production, the impact is minimal. There are specified limits for the temperature of the syngas fed to the low-temperature methanol wash unit; either too low or too high a temperature has little impact
The actual situation is that the temperature of the transformed gas is lower than the normal value!