Liquid nitrogen washing section
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How to adjust when the temperature difference between TDIC11116 N2 and syngas increases? To reduce this temperature difference, should the amount of cold syngas fed to the methanol removal unit be increased, or should this valve be closed? How is the amount of washing nitrogen adjusted? How to adjust the temperature control valve for the purified gas in the nitrogen washing tower? What is their relationship like?
In plate-fin heat exchangers with multiple fluid streams, there are many factors that affect the temperature difference. Especially in winter, when there is an abundance of cooling capacity, large temperature differences can occur. Reducing the value of TDV11116 is one solution; it is also possible to slightly reduce the throttling of the crude nitrogen stream and the exhaust gas. In any case, it is necessary to take into account all the various cold and hot fluid streams involved；
Reduce TDIC11116 appropriately to allow more cold medium to pass through the low-temperature methanol wash unit
The temperature difference between N2 and the thermally synthesized air is increasing; which one is higher?
The normal N2 temperature is higher than that of the syngas; under normal circumstances, the N2 temperature remains constant. Therefore, a temperature difference occurs – in most cases, this is due to the lower temperature of the syngas. The following methods can be employed to reduce the temperature difference: 1. Reduce TDV116 and increase the amount of cold syngas sent to the low-temperature methanol wash unit ； 2. It may be caused by an excessive amount of washing nitrogen: on one hand, this increases cold discharge, thereby reducing the heat exchange in the heat exchanger; on the other hand, it is necessary to reduce the amount of washing nitrogen used. 3. A significant reduction in the system’s load can also lead to an increase in the temperature difference. If there are any mistakes, please feel free to offer your suggestions.