Online monitoring system and method for performance of condenser in power plant based on cleanness coefficient index

Abstract

The invention discloses an online monitoring system and method for performance of a condenser in a power plant based on a cleanness coefficient index. The online monitoring system comprises a monitoring unit, a data acquiring unit and a computer; the monitoring unit comprises a first temperature sensor, a first pressure sensor, a second temperature sensor, a second pressure sensor, a flow sensor and a third pressure sensor, wherein the first temperature sensor and the first pressure sensor are arranged on a condenser circulated cooling water inlet pipeline, the second temperature sensor and the second pressure sensor are arranged on a condenser circulated cooling water return pipeline, the flow sensor is arranged on the water return pipeline, and the third pressure sensor is arranged at a steam inlet of a condenser. The method is used for calculating the pressure of the condenser with corrected data acquired by the online monitoring system and evaluating the performance of the condenser. In the invention, the problem of online monitoring of the performance of the condenser in the power plant in normal operation can be solved through simple measurement, and quantitative data on the running state of the condenser is provided for the operation and the overhaul of the power plant.

Description

technical field [0001] The invention relates to an on-line monitoring system and method for condenser performance in a power plant based on a cleaning coefficient index. Background technique [0002] As the heat exchange equipment at the cold end of the steam-water thermal cycle of the power plant, the condenser of the power plant is used to form a circulation of the steam-water medium by condensing the exhaust steam of the steam turbine on the one hand; on the other hand, to maintain a high vacuum state inside the condenser by condensing and releasing heat , to provide a good working environment for the expansion work of the steam turbine. [0003] With the development of large-capacity and high-parameter power units, the good performance of condensers in power plants has a greater impact on the economics of power plants. Taking the condenser of a subcritical 600MW unit as an example, if the condenser pressure increases by 1kPa due to the deterioration of the condenser’s w...

AI Technical Summary

Problems solved by technology

But at present, there is no special monitoring device for the performance of the condenser in the power plant, or generally only simple performance calculation can be done in the DCS control system, so it is impossible to conduct a comprehensive monitoring of the performance of the condenser

This is mainly because it is difficult to measure the parameters of the partial influence condenser, and the model for calculating the performance of the condenser is complex

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