Vulnerable parts usage time statistics

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Summary of service life statistics for wear-prone components
1# CO2 compressor
Service life of piston rings and support rings in stage 1: Manufacturer: Henan Bo’ai. Replacement date: December 11, 2008 → Inspection date: June 24, 2009 → December 25, 2009; total operating time: 3,026 hours → 3.2 months → 8,603 hours → 10.2 months → 10,970 hours.
Service life of piston rings and support rings in stages 4 and 5: Manufacturer: Yuanqu. Replacement date: January 4, 2009 → Inspection date: February 16, 2009 → December 25, 2009; total operating time: 3,392 hours → 1.3 months → 4,335 hours → 9.2 months → 10,970 hours.
Replacement dates of gas valves for stages 4 and 5: Manufacturers: Yuanqu, Henan Bo’ai, Shanghai Dalong (spare parts). Dates: January 14, 2009 → February 16, 2009 → February 18, 2009 → March 5, 2009 → April 8, 2009 → June 26, 2009 → August 16, 2009 → August 28, 2009 → October 24, 2009 → November 18, 2009 → December 25, 2009.

2# CO2 compressor
Service life of piston rings and support rings in stage 1: Manufacturer: Henan Bo’ai. Replacement date: November 14, 2008 → Inspection date: April 13, 2009 → December 25, 2009; total operating time: 3,878 hours → 6.5 months → 8,566 hours.
Service life of piston rings and support rings in stages 4 and 5: Manufacturer: Wenzhou. Replacement date: February 17, 2009 → Inspection date: May 26, 2009 → December 25, 2009; total operating time: 6,411 hours → 1 month → 7,166 hours → 2 months → 8,566 hours.
Replacement dates of gas valves for stages 4 and 5: Manufacturers: Yuanqu, Henan Bo’ai, Shanghai Dalong (spare parts). Dates: February 8, 2009 → February 9, 2009 → February 14, 2009 → February 14, 2009 → April 21, 2009 → May 10, 2009 → May 26, 2009 → September 30, 2009 → October 15, 2009 → November 9, 2009 → December 25, 2009. On May 27, 2009, the cylinder liner for stage 5 was replaced.

3# CO2 compressor
Service life of piston rings and support rings in stage 1: Manufacturer: Henan Bo’ai. Replacement dates: July 15, 2008 → May 10, 2009 (replaced by Wenzhou-made parts) → December 15, 2009 (replaced again by Henan Bo’ai-made parts); total operating time: 2,948 hours → 5.7 months → 7,075 hours → 3.2 months → 9,418 hours.
Service life of piston rings and support rings in stages 4 and 5: Manufacturer: Yuanqu. Replacement dates: October 2, 2008 → March 5, 2009 (inspection) → April 27, 2009 (replacement); total operating time as of December 25, 2009: 4,200 hours → 3.2 months → 6,548 hours → 3.5 months → 6,813 hours → 3.7 months → 9,529 hours.
Replacement dates of gas valves for stages 4 and 5: Manufacturers: Yuanqu, Henan Bo’ai, Shanghai Dalong (spare parts). Dates: March 5, 2009 → April 3, 2009 → April 9, 2009 → April 20, 2009 → July 6, 2009 → August 28, 2009 → September 16, 2009 → October 14, 2009 → November 3, 2009. On April 27, 2009, the cylinder liner for stage 5 was replaced.

1# Ammonia pump
Dates of packing replacements: Henan Bo’ai. Middle cylinder: January 10, 2009 → North cylinder: February 21, 2009 → Both middle and north cylinders: May 7, 2009; total operating time: 5,329 hours → 1.8 months → 5,966 hours → 1 month → 6,753 hours → 2.5 months → November 3, 2009 (three sets of packing replaced) → December 25, 2009; total operating time: 8,578 hours → 0.3 months → 8,849 hours.

2# Ammonia pump
Dates of packing replacements: Henan Bo’ai. North cylinder: January 12, 2009 → Middle cylinder: February 21, 2009 → Both middle and north cylinders: May 2, 2009; total operating time: 4,475 hours → 1.2 months → 4,512 hours → 1.1 months → 5,324 hours → 6.3 months → December 10, 2009 (three sets of packing replaced) → December 25, 2009; total operating time: 9,881 hours → 0.3 months → 10,119 hours.

3# Ammonia pump
Dates of packing replacements: Henan Bo’ai. Three sets of packing replaced on January 12, 2009 → June 29, 2009; total operating time: 6,137 hours → 3.2 months → 8,435 hours → 2.4 months → 10,182 hours. On June 29, 2009, clearances between main shaft bearings were measured: 0.28 mm for south bearing, 0.24 mm for middle bearing, and 0.26 mm for north bearing.

1# Methylamine pump
Dates of packing replacements: Henan Bo’ai. Middle and north cylinders: January 30, 2009 → South cylinder: April 8, 2009 → Three sets of packing replaced on June 12, 2009; total operating time: 5,094 hours → 2.8 months → 7,023 hours → 0.2 months → 7,192 hours → 3 months → October 2, 2009 (three sets of packing replaced) → December 25, 2009; total operating time: 9,354 hours → 1.6 months → 10,507 hours. On November 3, 2008, the combined valve from Xi’an was installed; it has been in operation ever since, with a cumulative operating time of 8 months.

2# Methylamine pump
Dates of packing replacements: Henan Bo’ai, Shanghai High-Pressure Valve Factory. Middle cylinder: November 3, 2008 → South cylinder: April 17, 2009 → Three sets of packing replaced on June 16, 2009; total operating time: 4,027 hours → 2.7 months → 5,044 hours → 1.3 months → 6,017 hours → 3.5 months → August 20, 2009 (middle cylinder replaced) → September 11, 2009 (north cylinder replaced) → October 2, 2009 (three sets of packing replaced by Shanghai High-Pressure Valve Factory); total operating time: 8,591 hours → 4 months → 8,950 hours → 2.3 months → 10,651 hours.

3# Methylamine pump
Dates of packing replacements: Henan Bo’ai. Middle and north cylinders: January 28, 2009 → Three sets of packing replaced on September 13, 2009 → December 20, 2009; total operating time: 5,494 hours → 4.8 months → 8,976 hours → 0.8 months → 9,586 hours. Mechanical seal of the reflux pump was replaced； 1# 2008.11.16—→2009.12.29—→2009.5.20—→2009.8.12—→2009.9.27—→2009.10.13—→2009.12.16—→2009.12.11 2# 2008.12.5—→2009.8.11—→2009.9.2—→2009.11.15 Replace the seal of the boiler feed pump ； 1# 2008.11.25—→2009.5.22—→2009.8.6—→2009.11.8