Broken bag locating-detecting device and method for distributed optical fiber bag type dust collector

Abstract

The invention relates to a broken bag locating-detecting device and method for a distributed optical fiber bag type dust collector. The broken bag locating-detecting device comprises a single-frequency laser light source and a pulse modulator, wherein the single-frequency laser light source is used for supplying coherent light energy to optical fiber sensors; the pulse modulator is used for converting continuous light output by the single-frequency laser light source into pulsed light of a certain pulse width and repeated frequency; the optical fiber sensors are vertically suspended in each bag in a helical manner; the bottoms of the optical fiber sensors are tied into knots; background noise in a non-running state is measured and recorded. The invention further discloses a broken bag locating-detecting method for the distributed optical fiber bag type dust collector. Two fiber cores of a communication cable integrate sensing and transmission, so that the detection of cable micro-vibration by air current through coherent Rayleigh noise is realized after the bag is broke. Meanwhile, detection of abnormal leakage temperature is realized in combination with a Raman thermometry principle, and signal transmission is realized by adopting the cable. The broken bag locating-detecting device and method are suitable for being applied to industrial fields with limited space and severe environment.

Description

technical field [0001] The invention relates to the technical field of bag dust removal systems, in particular to a leaky bag location detection device and method for a distributed fiber optic bag type dust collector. Background technique [0002] In recent years, my country's atmospheric environmental pollution has been very serious. Due to various exhaust gas pollution, haze weather frequently occurs, which has seriously affected people's life and work. In the cement industry, the bag filter technology is a traditional dust removal technology, but there are some shortcomings: first, the filter bag is damaged, and the damage is always accompanied by its entire life cycle; The resistance of the device is large, the power consumption of the system fan is high, and the environmental protection equipment must save energy and reduce consumption. [0003] In order to solve the problem of increased operating costs caused by the overall bag replacement of the dust collector, manua...

AI Technical Summary

Problems solved by technology

In the cement industry, the bag filter technology is a traditional dust removal technology, but there are some shortcomings: first, the filter bag is damaged, and the damage is always accompanied by its entire life cycle; The resistance of the device is large, the power consumption of the system fan is high, and the environmental protection equipment must also save energy and reduce consumption.

Among them, the sensing probe of the optical sensing method needs to be inserted into the pipeline, which may easily cause the sensing probe to be contaminated due to sticky dust, thereby causing false alarms in leak detection; The dust content in the clean flue gas in the dust collector is easily affected by external conditions. The measurement of the dust concentration can only be qualitatively judged, and quantitative analysis cannot be done; the fluorescent powder leak detection method can be used for small spaces and hidden areas. Leak detection can accurately locate the leak point, and it is intuitive and obvious, and it is easy to distinguish the leakage caused by the bag mouth not being compressed or the filter bag being damaged, but this method consumes a lot of phosphor powder, the detection cost is high, and manual inspection is required , the positioning of thousands of bags in the baghouse dust removal system is very time-consuming, and it is impossible to realize fully automated real-time monitoring

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