May I ask where the heat loss of methanol occurs in low-temperature methanol washing?
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May I ask where the heat loss of methanol occurs in low-temperature methanol washing?
1. Poor thermal insulation of the system, resulting in heat loss. 2. The temperature of the feed gas entering the process and the nitrogen stripped out is relatively high, while the temperature of the purified gas and exhaust gas leaving the process is lower; thus, the amount of heat carried away by these purified gas and exhaust gas also constitutes part of the heat loss in the system. 3. The methanol-rich stream at the bottom of the hydrogen sulfide concentration tower contains a certain amount of carbon dioxide; the carbon dioxide released during the regeneration of this methanol-rich stream in the thermal regeneration tower carries away the heat.
1. High gas temperature or large gas flow rate from the previous process stage. 2. Poor cooling efficiency of the ice machine. 3. Large circulation volume. 4. Issues related to the CO2 regeneration tower/H2S concentration tower. 5. High water content in the system, resulting in unstable operation of towers T03 and T04
①The heat of solution of acids and other substances in methanol; ② Heat losses during the heat exchange process in each heat exchanger; ③ Insulation issues and heat leakage from various equipment and pipelines; ④ Heat generated by pumps during transportation, as well as the amount of cold energy carried away by gases as they leave the system.
The heat loss in low-temperature methanol washing mainly consists of heat transfer losses, that is, incomplete heat transfer； Cooling loss: no matter how good the insulation is, some of the cold energy is always lost to the environment ； Carbon dioxide and hydrogen sulfide release heat of solution during the absorption process.
Pumps generate heat during operation, and there are heat loss issues associated with the heat exchangers and pipes. Generally, the gas temperature in the low-temperature methanol washing process is lower than its temperature before entering the system
1. Incomplete heat exchange 2. Insulation loss 3. Cooling capacity loss during analysis
During normal operation, the heat loss in this section includes: 1. Heat transfer losses in the heat exchangers; 2. Insulation-related heat losses; 3. Heat loss due to the heat of solution that occurs during the absorption of acidic gases; 4. The heat carried away by the process gas that passes through the liquid nitrogen washing stage
Pipe absorption. Spread outward. The purified gas and other exhaust gases are carried away.
It was explained in great detail, and I understood it right away