Boiler heated surface fault diagnosis method, device and system

Abstract

The invention provides a boiler heated surface fault diagnosis method, device and system. The method comprises the steps of: determining the range of a boiler heated surface; analyzing fault influence factors of the boiler heated surface to obtain physical quantities with high correlation; performing the similarity analysis and the modeling for the physical quantities with high correlation; and obtaining fault judging criterion of the boiler heated surface according to the results of the similarity analysis and the modeling. The boiler heated surface fault diagnosis method, device and system, provided by the invention, realize soft measurement of such faults as leakage of the boiler convection heated surface, improve the operation reliability of the boiler convection heated surface, reduce the fault rate, and reduce the safety and economy influences caused by such faults as leakage of the boiler convection heated surface.

Description

technical field [0001] The invention relates to the field of boiler fault diagnosis, in particular to a boiler heating surface fault diagnosis method, device and system. Background technique [0002] Due to wear, overheating, corrosion and other reasons, the heating surface of the boiler in the thermal power plant ruptures and leaks, which leads to the failure of the furnace tube and the accidental shutdown of the boiler. Once the thermal power unit leaks from the heating surface of the boiler, the boiler has to be shut down for emergency repairs, seriously affecting the normal production of the thermal power plant and causing huge economic losses. The existing thermal power plant boiler heating surface leakage diagnosis method is mainly to use sensor hardware to measure the internal noise signal of the boiler. When the internal noise signal is higher than the environmental noise, after appropriate processing, a corresponding alarm signal is output. But this method also has...

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Problems solved by technology

But this method also has shortcomings, the main reason is that when the boiler is running, usually when cracks or holes are generated on the heating surface, when the pressure of the medium (water or steam) inside the pressure-bearing heating surface is higher than a certain value, the high-temperature and high-pressure medium rushes A noise signal with a wider frequency band will be generated when the gap is out

If the internal medium pressure is too low, it may be affected by environmental noise, and the noise signal with a wider frequency band cannot be obtained

[0003] In the Chinese patent application with the application number 201110356036.X, a method of fault diagnosis triggered by the high superheated steam temperature alarm state is disclosed. Comprehensive analysis and judgment of various factors

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