On-line checking method for turbo-generator set boiler inlet feed water flow

Abstract

The invention provides an on-line checking method for turbo-generator set boiler inlet feed water flow. The on-line checking method comprises the following steps that data measured by a high-temperature ultrasonic flowmeter is checked, and a flow checking curve of the high-temperature ultrasonic flowmeter is acquired; deaerator outlet feed water flow data is calculated and compared with deaerator outlet feed water flow in a DCS of a turbo-generator set, and a flow checking curve of the deaerator outlet feed water flow in the DCS is acquired; boiler desuperheating water flow and boiler reheater desuperheating water flow are measured and compared with boiler desuperheating water flow and boiler reheater desuperheating water flow in the DCS of the turbo-generator set respectively, and checking curves of the boiler desuperheating water flow and the boiler reheater desuperheating water flow in the DCS are obtained separately; normally-operating boiler inlet feed water flow is calculated and compared with boiler inlet feed water flow displayed in the DCS, and a checking curve of the boiler inlet feed water flow in the DCS is obtained; the boiler inlet feed water flow is calculated according to the normally-operating boiler inlet feed water flow and the checking curve of the boiler inlet feed water flow. The on-line checking method has the advantages of being high in accuracy and stable in measurement.

Description

technical field [0001] The invention specifically relates to an online verification method for the inlet feed water flow rate of a turbogenerator set boiler. Background technique [0002] During the normal operation of the turbo-generator set, the performance monitoring of the turbo-generator set and the steam turbine usually uses the feedwater flow as the reference flow. However, the feedwater flow measurement devices of the power plant are in the high temperature and high pressure measurement state, and its accuracy is difficult to guarantee after long-term operation; although the measurement conditions of the condensate flow measurement device are relatively good, the process of calculating the feedwater flow from the condensate flow is still affected. The influence of many other measurement parameters; some turbogenerators also have the problem of poor accuracy of the condensate flow measurement device after long-term operation; the accuracy of the feed water reference f...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an online verification method for the inlet feed water flow rate of a steam turbine generator set, which solves the problem of online verification of the reference feed water flow rate in the normal operation of the steam turbine generator set, and can accurately determine the heat consumption rate index of the steam turbine unit and Provide accurate data for the calculation of power plant operation economic indicators, and provide a basis for power plant energy saving and consumption reduction

Images