On-line monitoring method for efficiency of circulating water pump of thermal power plant

Abstract

The invention discloses an on-line monitoring method for the efficiency of a circulating water pump of a thermal power plant. The method specifically comprises the following steps that (1), a water pump efficiency test flow meter is arranged on the to-be-monitored circulating water pump; (2), data provided by the water pump efficiency test flow meter arranged in the step (1) are collected, and meanwhile, the pressure, the shaft power, the rotating speed and the temperature are collected; (3), the data collected in the step (2) are transmitted to a special information data acquisition network;(4), data calculation is carried out on the data collected by the acquisition network in the step (3); (5), the data calculated in the step (4) are stored and displayed on a host display screen; and (6), real-time data and historical data of the efficiency of the circulating water pump of the thermal power plant are simultaneously presented in the forms of a table and curves of the water pump efficiency data obtained in the step (5) and are used for being used by workers, wherein the data can be presented in the forms such as the curve that a lift of the circulating water pump of the thermal power plant is changed along with the time, and the curve that the effective power of the circulating water pump of the thermal power plant is changed along with the time.

Description

technical field [0001] The invention relates to the technical field of detection in thermal power plants, in particular to an online monitoring method for the efficiency of circulating water pumps in thermal power plants. Background technique [0002] In modern thermal power plants, the circulating water pump is one of the main auxiliary machines of the power plant, and it plays an extremely important role in the operation of the entire unit. The stability of the circulating water pump unit directly affects the operation of the entire power plant. Operational stability is an important index to measure the working performance of the water pump unit, and the size of vibration has become one of the main technical indicators to describe whether the unit is stable or not and the installation quality is good or bad. [0003] The function of the circulating water pump is to supply cooling water to the steam turbine condenser to condense the exhaust steam of the steam turbine. In p...

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Problems solved by technology

[0017] The purpose of the present invention is to provide an online monitoring method for the efficiency of circulating water pumps in thermal power plants to solve the problems of insufficient detection technology, slow detection efficiency, and slightly low accuracy of detection data in the background technology.