Power station boiler heat expansion monitoring system and measuring method based on acoustical principle

Abstract

The invention belongs to the technical field of power station boiler acoustical monitoring and particularly relates to a power station boiler heat expansion monitoring system and a measuring method based on the acoustical principle. The system mainly consists of a sound wave generator, a sound wave receiver, a sound wave guide tube, a signal conditioner, a data wire, an input / output device, a wiring box, a collecting card and a computer host, wherein the sound wave generator is arranged at the measuring point arranged on a boiler. The sound wave generator is controlled to send out sound signals through host program, the signals are input into the host through a transmission wire after being received by the sound wave receiver, through calculation and analysis processing, the signals are displayed on the host in chart and simulated diagram modes, clearness and intuition are realized, and operators can conveniently know the expansion condition of boiler equipment in real time. The work intensity of the operators is lightened, the risk is reduced, and the operation level of a thermal power unit is improved.

Description

technical field [0001] The invention belongs to the technical field of acoustic monitoring of power plant boilers, and in particular relates to a thermal expansion monitoring system and measurement method of power plant boilers based on acoustic principles. Background technique [0002] The boiler is a whole composed of various complicated piping systems and steel structures, which will expand after being heated. Due to the different materials and different heating temperatures of each part, the amount of expansion produced is also different. When running in a hot state, a boiler with coordinated installation in a cold state will expand and deform. Due to the difference in the structure of the heating surface in the furnace and the heat load, the structure of the steam-water pipe, the flue gas pipe, the pulverized coal pipe, and the thermal parameters of the internal working fluid are different, and the inside and outside of the furnace are fixed. There are various structur...

AI Technical Summary

Problems solved by technology

At present, the expansion indicators of boilers at home and abroad are all mechanical. This kind of expansion indicator uses a steel needle welded on the expansion part to indicate the expansion on an iron plate with a coordinate grid, and the accuracy is low and inaccurate. , the damage is not easy to detect, which is not conducive to timely maintenance

The installation positions of the expansion indicators on the boiler are scattered, and the working conditions are harsh. When observing, the operating personnel have to run up and down, which is very inconvenient and dangerous

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