Visual intelligent monitoring system and method for ash deposition corrosion wear state of medium-low temperature smoke heat exchange equipment

Abstract

The invention relates to a visual intelligent monitoring system and method for the ash deposition corrosion wear state of medium-low temperature smoke heat exchange equipment, which are characterizedin that actual smoke is adopted, the actual operation working condition is fitted, the smoke inlet temperature and air speed can be adjusted, the working conditions of different smoke temperatures andflow speeds of the whole smoke system are simulated, and online monitoring data are provided; a resistance probe and an eddy current sensor are used for monitoring the conditions of heat exchange, corrosion resistance, wear resistance, ash deposition, coking and the like of the heat exchange tube; based on the convolutional neural network and an intelligent identification and analysis model of amonitoring probe state image, an image data set is made by using a large number of on-site pictures of the monitoring probe and the calculated heat transfer coefficient, ash deposition thermal resistance, corrosion rate and wear rate, and accurate matching of the image and the heat exchange tube state is realized; the intelligent identification and analysis model adopts a convolutional neural network algorithm model to carry out pixel-level processing on the image, state image features are accurately identified, and the accuracy of an analysis result is high; and the heat transfer coefficient,the ash deposition thermal resistance, the corrosion rate and the wear rate of the heat exchange tube are analyzed by images.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery and utilization of flue gas, and relates to a visual intelligent monitoring system and method thereof for ash accumulation, corrosion and wear state of medium and low temperature flue gas heat exchange equipment. It is especially suitable for on-line monitoring of the flue gas heat exchanger system of the power plant flue gas heat exchanger. Background technique [0002] In the prior art, the air pollution caused by coal burning is becoming more and more serious, and the area of ​​acid rain is constantly expanding. In addition to producing SO when coal is burned 2 In addition, a small amount of SO 3 , NO X , HCL, HF and other gases, because the flue gas contains water vapor, it can form H in an instant 2 SO 4 , HCL, HF and other strong corrosive solutions. At the same time, the flue gas containing soot passes through the equipment and pipelines at high speed, which seriously corr...

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Problems solved by technology

[0003] In order to study the performance of the flue gas heat exchanger in the flue gas system, there are currently three general research methods: (1) direct performance monitoring in the actual environment, This method greatly increases the experimental period and cannot be stopped during the operation, which may affect the normal production operation during the experiment; (2) build an experimental platform to simulate the actual flue gas system and heat exchanger working conditions, this method cannot completely Simulating the actual operating conditions of the heat exchanger will cause errors in the experimental results; (3) Add a bypass to the flue gas system, build a monitoring platform in the bypass, and use the actual flue gas on site to monitor and analyze the heat exchanger , this method needs to set up a large number of sensors to indirectly monitor various parameters of the heat exchanger, which cannot directly reflect the performance of corrosion resistance, wear resistance and scale inhibition of the heat exchanger

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