An online calibration method for boiler inlet feed water flow rate of steam turbine generator set

Abstract

The invention provides an online verification method of feed water flow rate at the boiler inlet of a turbogenerator unit, comprising the following steps: verifying the measurement data of the high-temperature ultrasonic flowmeter, obtaining the flow verification curve of the high-temperature ultrasonic flowmeter; calculating the outlet of the deaerator The feedwater flow data is checked against the feedwater flow rate at the outlet of the deaerator in the DCS of the steam turbine generator set, and the flow calibration curve of the feedwater flow at the outlet of the deaerator in the DCS is obtained; Calibrate the flow rate in the DCS of the steam turbine generator set to obtain the calibration curve of the DCS desuperheating water flow; calculate the boiler inlet feedwater flow in normal operation, and check it with the boiler inlet feedwater flow displayed in the DCS to obtain the DCS boiler inlet feedwater flow calibration curve; Calculate the boiler inlet feedwater flow from the DCS boiler inlet feedwater flow in normal operation and the DCS boiler inlet feedwater flow calibration curve. The invention has the advantages of high accuracy and stable measurement.

Description

Technical field [0001] The invention specifically relates to an online verification method for the inlet feedwater flow of a steam turbine generator set boiler. Background technique [0002] In the normal operation of the steam turbine generator set, the performance monitoring of the steam turbine generator set and the steam turbine usually uses the feed water flow as the reference flow. However, the power plant feedwater flow measurement devices are in 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 devices are relatively good, the process of calculating the feedwater flow from the condensate flow is still affected. Many other measurement parameters are affected; some steam turbine generator sets also have the problem of poor accuracy after long-term operation of the condensate flow measurement device; the accuracy of the feedwater re...

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

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