Fault Treatment and Cause Analysis of a SFOG Single Stage High Speed Centrifugal Compressor
The main fan KT-070801 of the sulfur recovery unit in a 900×104 m3/d natural gas purification plant is an SFOG single-stage high-speed centrifugal compressor.This paper focused on the recent occurrence of vibration ultra-high interlocking faults,which have caused the inability to start normally.After disassembling and inspecting the main comprssor and accessories,it was found that the IGV blades were broken and sucked into the unit.The broken blades collided violently with the compressor impeller,causing excessive vibration and damage to the impeller.After replacing the IGV blades and compressor impeller,it returned to normal.This paper also discussed the root causes of faults from three aspects of abnormal IGV valve position,IGV blade material and central control monitoring disk.