On September 1, the C-level maintenance work of Unit 6 at Fengcheng Power Plant reached a key milestone—the safe and successful completion of the A condensate pump installation task. This lifting operation is the largest hoisting task during the C maintenance of Unit 6, the first large equipment disassembly operation, and a standardized operation that lays the foundation for subsequent maintenance work. The massive object, measuring 10 meters in length and weighing 12 tons, was smoothly lifted under precise control, marking the completion of an important maintenance milestone for Unit 6 at Fengcheng Power Plant.
To ensure a stable safety situation on-site during the commemoration of the 80th anniversary of the victory of the Chinese People’s Anti-Japanese War and the World Anti-Fascist War on September 3, the plant management made meticulous arrangements for the high-risk operations before and after this date. The A condensate pump installation, as a vertical bag-type multistage centrifugal pump weighing 12 tons, is classified as a high-risk level three hoisting operation, making its safe and successful completion particularly important.
Meticulous Preparation, Plan First
For this high-risk operation, the turbine maintenance team collaborated with the construction unit to jointly participate in the drafting and revision of a special hoisting plan, meticulously considering every aspect including wire rope inspection, bolt removal, hoisting tool inspection, on-site hoisting, and pump rotation. The plan was successfully approved after two days of revisions and improvements.
Orderly Progress, Ensuring Safety
Based on past maintenance experience, it typically takes at least 48 hours from disassembling the motor frame bolts to lifting the condensate pump. To improve efficiency, project manager Zhou Jingshui arranged for the scaffolding to be set up a day in advance, immediately starting the bolt removal work on the motor frame, which was completed around 8 PM on September 1.
Simultaneously, the inspection and organization of shackles and wire ropes required for the hoisting operation were carried out, and work permits, secondary hot work permits, fire water usage applications, and hoisting operation permits were processed one by one, ensuring the smooth and orderly progress of the maintenance work.
Full Monitoring, Cautious Transport
At 11 AM on September 1, the condensate pump motor was successfully hoisted, and the turbine team immediately entered a state of readiness. Before lifting, all safety measures were fully implemented, and a monitor was assigned to each floor on-site. Command personnel wore reflective vests and armbands, and personnel on each floor maintained communication via walkie-talkies.
At 4:30 PM, the hoisting work officially began. Commands were issued from the zero-meter condensate pump area in the turbine room and relayed to the crane operator on the 13.7-meter level through the 6.9-meter level. The project manager, turbine specialists, hoisting command personnel, and safety officers were present to monitor the entire process.
After several steps including trial lifting, formal lifting, secondary hooking, mid-transport, and final landing, the condensate pump, measuring approximately 10 meters and weighing 12 tons, was lifted from the zero-meter level of Unit 6 to the 13.7-meter level. After adjusting its angle in the air, it was safely transported to the maintenance position in the transfer pit between Units 5 and 6. The entire process lasted nearly an hour, with operations conducted cautiously and orderly.
The successful hoisting of the A condensate pump not only created conditions for the smooth progress of the C maintenance work of Unit 6 but also provided strong guarantees for safe production during this special period.
Authors | Deng Deli, Zhou Jingshui
Editor | Wang Yingxun
Proofread by | Chen Jianjun, Xiao Wenbo
Reviewed by | Feng Lei