Quick measurement method for water content of pulverized coal injection by using electromagnetic wave resonant cavity

A resonant cavity and electromagnetic wave technology, which is applied in the direction of using microwaves to test moisture content, measuring devices, and using wave/particle radiation for material analysis, etc., can solve problems such as inability to quickly measure moisture

Inactive Publication Date: 2006-06-21
YUNNAN UNIV
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Problems solved by technology

At present, the moisture measurement of low-moisture pulverized coal generally adopts the traditional manual weighing and drying method, which cannot be used for rapid moisture measurement

Method used

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  • Quick measurement method for water content of pulverized coal injection by using electromagnetic wave resonant cavity
  • Quick measurement method for water content of pulverized coal injection by using electromagnetic wave resonant cavity
  • Quick measurement method for water content of pulverized coal injection by using electromagnetic wave resonant cavity

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Experimental program
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Embodiment

[0049] Example: see Figure 5 and 6 .

[0050] In this embodiment, the pulverized coal 1 flows into the hollow medium pipe 2, the hollow medium pipe is 100mm long, the inner diameter is 12mm, and the wall thickness is 1.5mm; the cylindrical metal resonant cavity 3 has a height of 14mm, a radius of 48mm, and is made of brass; The electromagnetic wave coupling device 4 is an electric coupling rod, the radius of the electric coupling rod is 1 mm, and the length is 4 mm; the central hole 5 of the cylindrical metal resonant cavity is 15 mm in diameter; 6 is a transmitting system composed of a frequency sweep circuit; 7 is an interface The circuits are respectively used to connect the computer with the transmitting system, connect the receiving system with the computer, and connect the computer with the temperature sensor; 8 is composed of a detection amplifier circuit and a DSP for the receiving system; 9 is a computer; 10 is a temperature measurement system, and the temperature s...

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Abstract

The invention discloses a low-moisture industrial material lossless detecting method of electromagnetic wave technique, which comprises the following parts: metal resonance cavity, hollow dielectric tube and computer, wherein the metal resonance cavity is thermostatic and driven by electromagnetic wave; the hollow dielectric tube is set in the metal resonance cavity. The method comprises the following steps: (1) putting the coal powder with different filling densities and water in the metal resonance cavity; measuring the ªñf and attenuation of electromagnetic signal and coal powder temperature; storing the list in the computer to finish the scaling and calibration course; (2) reading the ªñf, attenuation of electromagnetic signal and temperature from the computer when the coal powder flows through the hollow dielectric pipe; obtaining the disposed coal powder moisture in the dielectric pipe time through checking the graph. The invention confines the error result of 0.31-1.49 percent moisture content less than 0.16 percent, which is a non-touchable measurement.

Description

technical field [0001] The invention relates to a method for non-destructive detection of moisture in industrial materials by electromagnetic wave technology, especially for detection of low-moisture industrial materials. Background technique [0002] Blast furnace pulverized coal injection technology is a revolutionary and important measure for modern blast furnace ironmaking technology. It is the key technology for whether blast furnace ironmaking can compete with other ironmaking methods, continue to exist and develop. However, the flow and moisture control requirements of pulverized coal injection are high, especially the strict requirements on moisture content. In addition to reducing the theoretical combustion temperature, the level of moisture will also block the spray gun and pipes, affecting the stable operation of the injection system. There are many techniques for measuring the flow rate of pulverized coal. Pneumatic conveying coal powder flow measurement method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N22/04G01N23/00
Inventor 黄铭王威廉杨明华宗容蔡光卉施继红杨晶晶
Owner YUNNAN UNIV
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