A method for measuring coal humidity at the outlet of coal humidity control

Abstract

The invention discloses a method for measuring coal humidity at a coal humidity control outlet, which includes data collection, data screening, data processing and modeling, model checking, and humidity detection. The invention discloses a method for measuring the coal humidity at the outlet of coal humidity adjustment. By constructing the model of the temperature value of the steam outlet of the dryer and the humidity value of the outlet coal, the humidity value of the outlet coal can be obtained in real time by directly measuring the temperature value of the steam outlet of the dryer. It is impossible to achieve accurate online measurement of the export coal humidity value, and there is a problem of time lag in laboratory measurement.

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...

AI Technical Summary

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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