Q&A on Purification Technology Version [040]
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What is an appropriate temperature for the ammonia cooler in low-temperature methanol washing, and what should be the control rate for system cooling? Answer: Generally, an ammonia cooler is installed in methanol washing systems in order to maintain a balance of cooling capacity within the system. When the system temperature drops, even if the ammonia cooler operates at full capacity, the rate of temperature drop is not very fast; therefore, no special control is necessary. However, during initial startup or after major repairs, since the ammonia cooler operates at room temperature, it is important to control the temperature difference to prevent excessive stress that could damage the heat exchanger. At this time, the ammonia cooler should be brought online gradually, with the temperature difference between its inlet and outlet kept at no more than 15°C; the cooling rate of the system should be controlled at 5°C per hour. Coalification Region Purification Technology Edition – 2017 Coal Chemical Industry “My Technical Upgrades” Contest (Generous Prizes Available) http://bbs.hcbbs.com/thread-1786290-1-1.html Registration for Chemical Engineers – Experience Sharing Event “Learning from Others’ Experiences” http://bbs.hcbbs.com/thread-1808158-1-1.html
Ammonia coolers are generally installed in methanol washing units in order to maintain the heat balance of the system. When the system temperature drops, even if the ammonia cooler operates at full capacity, the rate of temperature drop is not very fast; therefore, no special control is necessary. However, during initial startup or after major repairs, since the ammonia cooler operates at room temperature, it is important to control the temperature difference to prevent excessive stress that could damage the heat exchanger. At this time, the ammonia cooler should be brought online gradually, with the temperature difference between its inlet and outlet kept at no more than 15°C; the cooling rate of the system should be controlled at 5°C per hour.
Ammonia coolers are generally installed in methanol washing units in order to maintain the heat balance of the system. When the system cools down, even if the ammonia cooler operates at full capacity, the rate of cooling is not very fast; therefore, no special control is necessary. However, during initial startup or after major repairs, since the ammonia cooler operates at room temperature, it is important to control the temperature difference to prevent excessive stress from damaging the heat exchanger. At this time, the ammonia cooler should be brought online gradually, with the temperature difference between its inlet and outlet kept at no more than 15°C; the cooling rate of the system should be controlled at 5°C per hour.
Ammonia coolers are generally installed in methanol washing units in order to maintain the heat balance of the system. When the system temperature drops, even if the ammonia cooler operates at full capacity, the rate of temperature drop is not very fast; therefore, no special control is necessary. However, during initial startup or after major repairs, since the ammonia cooler operates at room temperature, it is important to control the temperature difference to prevent excessive stress that could damage the heat exchanger. At this time, the ammonia cooler should be brought online gradually, with the temperature difference between its inlet and outlet kept at no more than 15°C; the cooling rate of the system should be controlled at 5°C per hour.
Ammonia coolers are generally installed in methanol washing units in order to maintain the heat balance of the system. When the system temperature drops, even if the ammonia cooler operates at full capacity, the rate of temperature drop is not very fast; therefore, no special control is necessary. However, during initial startup or after major repairs, since the ammonia cooler operates at room temperature, it is important to control the temperature difference to prevent excessive stress that could damage the heat exchanger. During the initial startup or after a major overhaul, when the temperature of methanol and the equipment is at room temperature, it is necessary to introduce ammonia coolers slowly; we usually do this manually, ensuring that the temperature difference between the inlet and outlet of the ammonia coolers does not exceed 15 degrees. Once the temperature drops below around 0 degrees, it is possible to increase the flow rate through the ammonia coolers. It doesn’t matter if you drive off again after a short-term parking.
Ammonia coolers are generally installed in methanol washing units in order to maintain the heat balance of the system. When the system temperature drops, even if the ammonia cooler operates at full capacity, the rate of temperature drop is not very fast; therefore, no special control is necessary. However, during initial startup or after major repairs, since the ammonia cooler operates at room temperature, it is important to control the temperature difference to prevent excessive stress that could damage the heat exchanger. At this time, the ammonia cooler should be brought online gradually, with the temperature difference between its inlet and outlet kept at no more than 15°C; the cooling rate of the system should be controlled at 5°C per hour.
Ammonia coolers are generally installed in methanol washing units in order to maintain the cooling capacity of the system
Ammonia coolers are generally installed in methanol washing units in order to maintain the heat balance of the system. When the system cools down, even if the ammonia cooler operates at full capacity, the rate of cooling is not very fast; therefore, no special control is necessary. However, during initial startup or after major repairs, since the ammonia cooler operates at room temperature, it is important to control the temperature difference to prevent excessive stress from damaging the heat exchanger. At this time, the ammonia cooler should be brought online gradually, with the temperature difference between its inlet and outlet kept at no more than 15°C; the cooling rate of the system should be controlled at 5°C per hour.
Keep the temperature difference between the inlet and outlet of the ammonia cooler at no more than 15 degrees; the cooling rate seems to be around 5 degrees per hour! The temperature at the temperature measurement point of the absorption tower while driving is -30 degrees