Method for Determining Maintenance Intervals for Boiler Feed Pumps in Ultra-Supercritical Units

Abstract

The invention discloses a method for determining the maintenance interval of an ultra-supercritical unit boiler feed pump. The method comprises the following steps that the stability parameters and the economic parameters generated when the ultra-supercritical unit boiler feed pump operates in real time are obtained; the obtained stability parameters and the economic parameters generated during real-time operating are compared with the original stability parameters and the economic parameters, and the economy parameter variation and the stability parameter variation are obtained; and the economy parameter vibration and the stability parameter vibration are used for representing the wear failure state among dynamic components and static components in the ultra-supercritical unit boiler feed pump, and accordingly the maintenance interval of the ultra-supercritical unit boiler feed pump is determined. By the adoption of the method, the overhaul time is determined, the shortcoming of the consideration of the influence of the original timing plan overhaul on the economy is made up for, and the method is especially used for modern high-speed high-pressure boiler feed pumps.

Description

technical field [0001] The invention relates to the technical field of feed water pump maintenance, in particular to a method for determining the maintenance interval of an ultra-supercritical unit boiler feed water pump. Background technique [0002] The boiler feed water pump is one of the main energy-consuming auxiliary machines of the power station, which increases with the increase of the steam parameters of the main engine. According to the size of power consumption, the level of operating parameters and its overall structure, feed water pumps can be simply divided into two categories - traditional high and medium pressure boiler feed water pumps and modern ultra-supercritical high speed and high pressure boiler feed water pumps. [0003] The operating speed of the traditional type is generally below 3000r / min, and it is usually a single casing and segmented type, and is integrally connected by through-bar bolts, while the modern ultra-supercritical type generally oper...

AI Technical Summary

Problems solved by technology

In the past, due to the large number of stages, poor manufacturing process, and poor component materials, the overhaul interval of traditional boiler feed pumps was usually scheduled along with the main steam turbine. This method is also mainly to ensure the safe operation of the unit. Considering from the perspective of the equipment and its overhaul, the economic impact of the equipment and its overhaul is not fully paid attention to

[0004] For modern ultra-supercritical boiler feed water pumps, the increase in speed makes the structure more compact. At the same time, due to the substantial improvement in manufacturing technology and component materials, the life of safe operation is greatly extended, especially for those pumps that are easily damaged and flushed inside. 1. Modern ultra-supercritical high-speed, high-pressure boiler feed pumps with special materials and special processes used in the easy-to-wear parts usually operate continuously for many years before observing slight changes in their performance. Blindly increasing the number of overhauls of feed water pumps will bring unnecessary economic consumption, which is obviously not suitable for the economical and safe operation of modern ultra-supercritical boiler feed water pumps.

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