Abstract: This paper elaborated on the design and selection process of the domestic large-scale product gas compressor. It conducted a theoretical analysis on the design key points such as the configuration and arrangement of the compressor unit based on the temperature control. Through combined configuration of two separated stages with internal cooler plus the coolant injecting into the compressor chamber, the outlet temperature of both stages can be controlled within 72 ℃ to ensure a safe margin for the highest temperature limit of 80 ℃. Meanwhile, the paper proposed an innovative parallel arrangement in which two compressors are driven by one steam turbine so as to improve the operating efficiency and reduce the operating difficulty of the entire unit. Finally, combining with the field operating data of the compressor unit from actual application, the paper verified the rationality of the program design and proposed the optimization direction.

Key words: product gas, compressor, temperature control, configuration plan, layout plan