机组大修安全质量管理（Unit overhaul, safety, quality management）.docVIP

机组大修安全质量管理（Unit overhaul, safety, quality management） Safety quality management of thermal power plant unit overhaul 1 Classification of equipment overhaul The overhaul of power plant units are usually divided into temporary inspection, repair, overhaul. At present, some domestic power plant with the maintenance of overseas power plants, renamed A, B, C, D, E class maintenance, which is a B class for overhaul, minor repairs, grade C rummage, D level was 24 h in the elimination of grade E for immediate repair. The service life of the equipment is usually divided into 3 periods: the early failure period, the accidental failure period, and the loss failure period. The loss failure period of parts after years of operation, both the mechanical strength and thickness of pipe wall or device sensitivity due to various factors, declining health equipment, some major equipment problems often implied. In order to prevent the occurrence of equipment damage, it is necessary to arrange the unit overhaul within 3~6 a of the unit for continuous operation according to the instruction manual given by the equipment manufacturer and the operation condition of the power plant unit. The overhaul of unit outage is 45 ~ 60 d, the unit series part or all the equipment completely disintegrated, comprehensive testing, evaluation of the health status of the equipment, targeted by repair or replace some parts, the whole process of the unit restored to good condition. 2 the main problems in the process of equipment maintenance A few years ago, I plant maintenance department to do a lot of work, but the quality of maintenance has been unsatisfactory, not only the unit equivalent availability factor has been in the low level competition inside and outside the province, non planned temporary stop times higher, the safe and stable operation of the goal seems to be miles away, and make the first-class standard, and other basic work influenced by. Annual maintenance and maintenance costs are not expen