What are the reasons for high temperature of circulating methanol and high inlet pressure of the chiller?
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What are the reasons for high temperature of circulating methanol and high inlet pressure of the chiller?
The temperature of the circulating methanol is high, resulting in large heat exchange and evaporation in the ammonia cooler; this causes the pressure of gaseous ammonia at the inlet to the synthesis unit to increase.
When the methanol concentration is low, the temperature is high; this results in a greater load on the chiller, more air intake, and thus a higher outlet pressure
The chiller’s load is insufficient; increasing the speed helps to reduce the pressure at the chiller’s inlet, and as a result, the temperature of the circulating methanol drops