Pressure at the top of the absorption tower
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How to control it? Is it controlled by the reabsorption tower? Or control the pressure of the rich gas? What about the analysis tower?
The absorption tower, reabsorption tower, and desorption tower form a single unit; control is generally exercised on the pressure of the reabsorption tower, and the pressure of the rich gas also changes in accordance with the pressure of the reabsorption tower
The pressure balance between the absorber and the reabsorber in the air compressor system is such that the pressure at the outlet of the air compressor, which represents the pressure of the rich gas, serves as the driving force, while the pressure in the reabsorber acts as a backpressure to maintain a stable pressure level. For the pressure control of the analysis tower, a value slightly higher than the outlet pressure of the air compressor is sufficient