Measurement method of outlet coal moisture of coal moisture control

Abstract

The invention discloses a measurement method of outlet coal moisture of coal moisture control. The method includes data collection, data screening, data processing and modeling, model inspection and moisture detection. According to the measurement method of the outlet coal moisture of the coal moisture control disclosed by the invention, an outlet coal moisture value can be obtained in real time through constructing a dryer steam outlet temperature value and outlet coal moisture value model and directly measuring a dryer steam outlet temperature value, and problems that accurate online measurement of the outlet coal moisture value cannot be realized, and time delaying of measurement in laboratories exists are solved.

Description

technical field [0001] The invention belongs to the field of measuring methods for coal humidity, and in particular relates to an online measuring method capable of rapidly detecting coal humidity at a coal humidity control outlet. Background technique [0002] Coal moisture itself is a multi-parameter coupling, nonlinear and large time-delay distributed parameter system, and it is difficult to obtain accurate data using traditional modeling and measurement methods. In the current actual production process, although the humidity at the outlet of the rotary kiln has actually been measured by a variety of the most advanced direct measuring instruments in the world, such as: radar, ultrasonic, infrared, etc., due to the environment and medium at the outlet of the rotary kiln Due to the mixed media containing a large amount of water vapor and tar and other volatile components, accurate online measurement cannot be realized in the end; at present, the test results of the coal moi...

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Problems solved by technology

[0002] Coal moisture itself is a multi-parameter coupling, nonlinear and large time-delay distributed parameter system, and it is difficult to obtain accurate data using traditional modeling and measurement methods

In the current actual production process, although the humidity at the outlet of the rotary kiln has actually been measured by a variety of the most advanced direct measuring instruments in the world, such as: radar, ultrasonic, infrared, etc., due to the environment and medium at the outlet of the rotary kiln Due to the mixed media containing a large amount of water vapor and tar and other volatile components, accurate online measurement cannot be realized in the end; at present, the test results of the coal moisture at the outlet of the dryer in the laboratory lag behind the production by about 15 hours, and it is difficult to provide timely guidance production operation

When the coal moisture at the inlet of the dryer is stable, this time lag can also maintain the stability of the coal moisture at the outlet of the dryer. However, when the rainy weather in the Jiangnan area causes large fluctuations in the moisture in the open-pit coal yard, the humidity of the outlet coal fluctuates greatly. It affects the operation of the coal humidity control system and the coking quality of the coke oven

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