Tuning method for microwave measurement parameters of pulverized-coal concentration
A technology for microwave measurement and pulverized coal, applied in the field of measurement, can solve the problem of difficulty in determining the installation method of the microwave frequency probe antenna, and achieve the effects of easy implementation, good effect and high application value
Inactive Publication Date: 2016-03-23
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology
[0005] The purpose of the present invention is to provide a scientific and accurate method for determining the microwave frequency and the installation of the probe antenna in the primary air pulverized coal concentration in order to solve the problem that the microwave frequency and the installation method of the probe antenna in the primary air pulverized coal concentration are difficult to determine in the prior art. Setting method of microwave measurement parameters of pulverized coal concentration
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] The setting method of the coal powder concentration microwave measurement parameter of the present invention, the content that it comprises has:
[0022] 1) Selection of microwave emission frequency
[0023] Such as figure 1 As shown, the microwave transmission in the primary air duct is a typical circular waveguide transmission problem. The microwave transmission is a function of three-dimensional space and time. According to the relationship between the magnetic field, electric field and propagation direction, it can be divided into multiple modes. There are also a variety of modes in the transmission process. According to the relationship between the electromagnetic field and the direction of propagation, they are generally divided into two categories: transverse electric (TE) waves. Transverse electric (TE) waves mean that the component of the electric fiel...
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Abstract
The invention discloses a tuning method for microwave measurement parameters of the pulverized-coal concentration. The tuning method is characterized by including the steps of selecting optimal microwave transmitting frequency and selecting a microwave probe installing mode. Site verification proves that the microwave frequency and the probe installing mode determined by the tuning method for the microwave measurement parameters of the pulverized-coal concentration meet the experiment condition, and therefore the effectiveness and the practicability of the tuning method for the microwave measurement parameters of the pulverized-coal concentration are verified; compared with a traditional tuning method for the site microwave frequency and the probe installing mode, the tuning method for the microwave measurement parameters of the pulverized-coal concentration has the advantages of being scientific, accurate, easy to achieve, high in applicability and application value, good in effect, free of influences of extra factors and the like.
Description
technical field [0001] The invention belongs to the technical field of measurement, and relates to a method for setting coal powder concentration microwave measurement parameters. Background technique [0002] The primary air powder concentration of the power plant refers to the pulverized coal concentration in the powder feeding pipe in front of the boiler burner nozzle. It is an important technical parameter that will directly affect the pulverized coal concentration injected into the furnace, thereby affecting the combustion status of the boiler. Therefore, it is very important to control the pulverized coal concentration in the primary air duct and the uniformity of the powder delivery speed for the safe and economic operation of the boiler. To control the pulverized coal flow and concentration of each burner, the pulverized coal concentration must first be controlled. Accurate online measurement, however, because the pulverized coal flow is a gas-solid two-phase flow, i...
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IPC IPC(8): G01N15/06
CPCG01N15/06G01N22/00
Inventor 陈立军崔俊浩邱立科孔德山宫永立杨以光
Owner NORTHEAST DIANLI UNIVERSITY