Coal mill wear blockage early warning method and system

A technology for coal pulverizers and blocking grinding, applied in the information field of coal pulverizers, can solve the problems of difficult to obtain accurate judgment, unfixed time length, slowness, etc.
CN112686477AActive Publication Date: 2021-04-20北京工业大数据创新中心有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
北京工业大数据创新中心有限公司
Publication Date
2021-04-20

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Abstract

The invention provides a coal mill blocking early warning method and system, and the method comprises the steps: recognizing the coal feeding condition of a coal mill according to the coal feeding amount data of the coal mill, and obtaining a recognition result; monitoring the running state of the coal mill according to the recognition result to obtain a monitoring result; according to the monitoring result, risk interval division is conducted on the coal feeding amount data, and time series data of continuous risk intervals are obtained; performing trend analysis and prediction on the time series data of the continuous risk interval to obtain analysis and prediction results; and according to the analysis and prediction result, outputting a coal mill wear blockage early warning grade. According to the technical scheme, hierarchical risk research and judgment and continuous risk window division are carried out, and window feature extraction and trend analysis and prediction based on time / frequency domain feature analysis are carried out, so that graded alarming on coal mill blockage is realized.
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Description

technical field

[0001] The invention relates to the field of information technology of coal pulverizers, in particular to a coal pulverizer blockage early warning method and system. Background technique

[0002] Coal pulverizer is an important auxiliary equipment in coal-fired power plants. It grinds raw coal into coal powder as raw material for boiler combustion.

[0003] Coal mill blockage is a common abnormal working condition, which may lead to increased power consumption and large discharge of pebble coal, or unplanned shutdown of equipment and damage to equipment parts in severe cases.

[0004] The coal mill system mainly has the following characteristics:

[0005] 1) It has the characteristics of strong coupling, large inertia and nonlinearity;

[0006] 2) Mill blocking is usually a very slow process, the length of the process is not fixed, it may be very long or very short;

[0007] 3) Various working conditions such as coal grinding and coal feeding conditions of...

Claims

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