Device for detecting ash content at coal bypass on line and method thereof

Abstract

The invention relates to a device for detecting ash content at a coal bypass on line and a method thereof which are a rapid and automatic detection device for continuous detections of ash content and a method thereof. The device comprises a sampling system arranged on a mainline for transporting coal flow, a crusher connected with the sampling system, a sample regulating mechanism connected with the crusher, a diathermaneity measuring instrument for measuring very low diathermaneity arranged on the sample regulating mechanism and a material-abandoning mechanism connected with the sample regulating mechanism. As a bypass automatic sampling device is used, inference of the previous transportation to the detection instrument is removed, so that the diathermaneity measuring instrument can work in an optimal environment to give play to efficiency thereof; crushed coal dust is even in particle and density and rays penetrate through the coal dust evenly; a transmission belt provided with a lateral baffle and an upper scraper plate reshape the coal dust into appropriate shape and thickness, thus excluding the possibility of measurement error caused by irregular shape of the objective to be detected and improving detection accuracy in the case of use of a radiation source with extremely low intensity.

Description

technical field [0001] The invention relates to a coal bypass online ash detection device and method, which is a non-destructive coal detection device and method that does not change the chemical composition of the measured object, and a rapid automatic detection device and method that can continuously detect coal quality . Background technique [0002] The traditional coal ash standard determination method is the ignition weighing method. The method is to crush a certain amount of coal into coal powder, weigh it, burn it to form a residue, and analyze the weight before and after burning to determine the coal ash. This method can determine the ash content of coal more accurately, but the detection speed is slow, and it cannot meet the needs of rapid online and continuous detection of ash content quality on the transportation line during the coal transfer and sales process. The above detection method is a destructive detection, just like striking a match to test the quality ...

AI Technical Summary

Problems solved by technology

However, increasing the intensity of the radioactive source does not increase linearly with the improvement of the measurement accuracy, and the increase in the intensity of the radioactive source will also produce many adverse effects, such as the increase in the surrounding radiation requiring biological protection. In other words, the increased accuracy is need to pay more cost

In addition, since the measuring instrument is directly installed on the original transportation system, the original transportation system will also have an impact on the detection instrument. For example, the radiation measurement technology cannot be used on the belt conveyor with steel wire

[0005] Under normal circumstances, in order to increase the accuracy, technicians always work hard on the measuring instruments to improve the performance of the instruments as much as possible in order to obtain satisfactory results. However, it is often half the effort and the loss outweighs the gain

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