Reasons for the four-stage overpressure cooling of the compressor
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For the carbon dioxide stripping process, the three-stage compressor outlet is fed into the desulfurization and dehydrogenation system. Currently, compressors #1 and #2 are operating under the same load. However, the exit pressure at stage 4 of compressor #1 is 0.5 MPa higher than that of compressor #2, while the exit temperature at stage 4 of compressor #1 is 12 degrees Celsius lower than that of compressor #2. It is now assumed that there is a fault with compressor #1; what could be the possible causes, according to experts?
I’m not aware of the structure of your compressor; you should check whether there is any leakage from high pressure to low pressure. Carbon dioxide has the property of cooling down after being throttled
I estimate it is due to severe wear of the fifth-stage piston rings in compressor #1
Yesterday, upon inspection, it was found that all five piston rings were completely worn out. The five support rings were in use and had suffered slight wear due to misalignment
The fourth-stage air valve of Unit 2 has internal leakage or severe piston ring leakage