Abstract: In order to solve the problem that the seawater flow in the heat exchanger is often blocked by shellfish marine organisms during the operation of the natural gas compressor on the offshore platform,resulting in the gradual decline of the heat exchange efficiency,through the analysis,it is proposed to upgrade and transform the natural gas compressor processes. The upgrading and transformation mainly includes：installing a filter at the seawater inlet of the heat exchanger,upgrading the heat exchanger head,installing an electrolytic copper aluminum electrode in the seawater main filter,installing an end flushing pipeline,and so on. This paper mainly analyzes and compares the advantages and disadvantages of installing a filter at the seawater inlet of the heat exchanger,the advantages and disadvantages of installing a main filter and a split filter,and the advantages and disadvantages of replacing the head with a straight-through or quick opening blind plate in the upgrading and transformation. A more suitable scheme is found out,and relatively reasonable suggestions are put forward to provide reference for the stable operation of natural gas compressor on offshore platform in the future.

Key words: compressor, process, upgrading and transformation, suggestions