Method for detecting thickness of accumulated dust on outer wall of pipeline and detection system

Abstract

The invention provides a method for detecting the thickness of accumulated dust on the outer wall of a pipeline and a detection system. The detection system comprises a processing device, a plurality of excitation units and a plurality of receiving units, wherein each excitation unit comprises a connecting seat and a plurality of ultrasonic exciters; each receiving unit comprises a connecting body and a plurality of receivers; and the ultrasonic exciters and the receivers are both electrically connected with the processing device. The method for detecting the thickness of accumulated dust on the outer wall of the pipeline and the detection system provided by the invention have the beneficial effects that a scheme is simple and reliable, the operation management efficiency of an incinerator can be effectively improved, the method and the system have the characteristic of non-intrusive detection, online monitoring can be achieved, and quantitative grading can be achieved.

Description

technical field [0001] The invention relates to a detection technology for the outer wall of a pipeline, in particular to a method and a detection system for detecting the thickness of dust accumulation on the outer wall of a pipeline. Background technique [0002] The incineration system based on waste incineration power generation will generate inorganic waste slag during operation, and these waste slag will migrate to the subsequent processing link along with the flue gas in the furnace. When the waste slag migrates to the heat exchange link, it will deposit a large amount on the heat exchange pipe. The soot deposited on the heat exchange pipes will seriously affect the heat exchange efficiency; the soot blowing device is generally used to deal with the soot in the furnace, but because the ash deposit is located in the furnace, the operator cannot grasp the ash deposit in time. For this reason, foreign A variety of slagging diagnostic techniques and monitoring systems hav...

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Problems solved by technology

Among them, the University of Waterloo in Canada has developed a special monitoring system for furnace slagging by using the heat flow meter method, which can determine the degree of fly ash contamination on the heating surface. Although this method has been successful in experiments, its application in actual engineering is limited. Due to the development level of materials, technology and technology and the complexity of on-site operation, and because the heat flow meter is expensive, cumbersome to install, and the heat flow meter is inaccurate or damaged due to the high-temperature and high-ash environment in which it works, resulting in heat flow It is difficult to popularize and apply the counting method in engineering practice

The heat transfer coefficient method is simple and intuitive, and can reflect the overall situation of ash deposits in the furnace; however, it can only evaluate the overall ash deposits in the furnace, and cannot diagnose the local ash deposits at different locations. It is difficult to find the initial location of ash deposits. It is also difficult to optimize the soot blowing according to the slagging situation; while the direct diagnosis method is simple and intuitive, and the results are easy to read, but when the boiler capacity is large, this method can only be applied to the diagnosis of the soot accumulation situation in a limited position near the observation hole , while the infrared imaging camera is susceptible to interference from smoke and dust

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