System temperature
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What is the maximum temperature that low-A can reach without ice machine cooling? What will happen if a water cooler is added to the outlet of the lean liquid pump of the lean methanol tank? How low can methanol be reduced to after cutting off the process gas? Where is this point?
Generally speaking, the maximum temperature of low-temperature methanol washing should not exceed 50 degrees without cooling. This is mainly to prevent cavitation of the lean methanol gasification pump at high temperatures, and at the same time, the loss of methanol increases at high temperatures! The effect of adding a water cooler to the outlet of the lean liquid pump is not very good, especially in summer, the temperature of the cooling water is high, and the maximum temperature difference before and after cooling is only three to four degrees! If there is no gas guide, the methanol temperature of the (liquid ammonia refrigeration) system can be reduced to about -33 degrees, because the minimum vaporization temperature of liquid ammonia is -33 degrees! After the system is cut off, there is no specific value for the temperature drop (it is almost the temperature of the system when you cut off the air, generally the lowest point is the P1 pump inlet temperature), because generally the system will start to regenerate and return to temperature after the system is cut off! !
If the temperature of low-methyl methanol cannot exceed the boiling point of methanol without ice machine cooling, methanol will be lost above this temperature. If a water cooler is added to the outlet of the lean liquid pump of the lean methanol tank, the situation is not ideal. The temperature of the circulating water changes with the seasons, especially in summer, the cooling effect is poor. After cutting off the process gas, methanol can only drop to -40 degrees with ammonia as the refrigerant. This point is at the outlet of the ammonia cooler.