On-line Monitoring Method of Exhaust Enthalpy of Low Pressure Cylinder of Steam Turbine

Abstract

The invention relates to a method for monitoring a steam turbine low-pressure cylinder exhaust steam enthalpy value online. The method comprises the following steps: acquiring real-time operating data of a needed unit; recoding the received transmission data; obtaining a hydrophobic enthalpy value of a lower-pressure heater group, and transmitting a calculation result to a steam turbine low-pressure cylinder exhaust steam enthalpy value calculation module and a data storage server; obtaining the steam turbine low-pressure cylinder exhaust steam enthalpy value, and transmitting the calculation result to a master display screen of the system and the data storage server; classifying and storing the data through the data storage server; and simultaneously presenting the steam turbine low-pressure cylinder exhaust steam enthalpy value and a historical operating cleaning coefficient in a table and curve form on the master display screen of the system. According to the method, important operating monitoring parameters of the steam turbine and the steam turbine low-pressure cylinder exhaust steam enthalpy value are calculated in real time and are presented to the operating crew in the forms of graphs and historical curves, and the operating crew are helped to master the real-time operating state of the steam turbine.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation and energy saving, in particular to an online monitoring method for the exhaust steam enthalpy value of a steam turbine low-pressure cylinder. Background technique [0002] The exhaust steam of the low-pressure cylinder of the steam turbine is in the wet steam area, and its enthalpy value cannot be calculated by measuring the temperature and pressure of the exhaust steam of the low-pressure cylinder according to the conventional calculation method, and there are currently no relatively mature methods and instruments that can be applied to the engineering field for testing Wet steam humidity, but the exhaust enthalpy of the low-pressure cylinder of the steam turbine is an important parameter in the operation of the steam turbine, which has a great influence on the operating economy of the unit. Contents of the invention [0003] The object of the present invention is to propose a...

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Problems solved by technology

[0002] The exhaust steam of the low-pressure cylinder of the steam turbine is in the wet steam area, and its enthalpy value cannot be calculated by measuring the temperature and pressure of the exhaust steam of the low-pressure cylinder according to the conventional calculation method, and there are currently no relatively mature methods and instruments that can be applied to the engineering field for testing Wet steam humidity, but the exhaust enthalpy of the low-pressure cylinder of the steam turbine is an important parameter in the operation process of the steam turbine, which has a great impact on the economical operation of the unit

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