Regarding low-methane system pressure control
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This post was last edited by wgqmqez on 2015-8-14 22:09. Let’s discuss together where the pressure in the low-temperature methanol washing system is controlled. Our pressure is controlled by the pressure control valve at the outlet of the process gas pre-cooler. Under single-load conditions, the opening degree of this valve is very small, at only 4–8% open. The opening of both furnaces is around 20%, and the pressure control fluctuates within about 30 kPa. The inlet of the syngas compressor can also be used to control the bottom shell pressure; I’m not sure if such control is available. Which of the two control methods is better?
Overall, using the compressor inlet pressure for control is reasonable, as it reduces unnecessary energy losses.