System and method for detecting carbon content of fly ash under dynamic condition of hollow metal waveguide

A technology of hollow metal waveguide and carbon content of fly ash, which is applied in the direction of measuring device, material analysis by means of microwave, instrument, etc., can solve the problem of complex equipment, clogging of measuring cavity, and unclear characteristics of tail flue gas flow field and distribution problems, to achieve high resolution and test accuracy, higher accuracy, and better accuracy

Active Publication Date: 2020-04-24
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is understood that many power plants are still using the sampling method to detect fly ash samples. The following problems generally exist in the sampling method: when the ash sample enters the measurement chamber, the temperature drops sharply and condensation occurs, which blocks the measurement chamber with ash, and the tail smoke is not clear. Due to the characteristics and distribution of the flue g

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method for detecting carbon content of fly ash under dynamic condition of hollow metal waveguide
  • System and method for detecting carbon content of fly ash under dynamic condition of hollow metal waveguide
  • System and method for detecting carbon content of fly ash under dynamic condition of hollow metal waveguide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] The device includes: a flue gas connecting pipe 25, a hollow metal waveguide 1, a coaxial converter 3, an electromagnetic wave isolation device 4, a first fluidizer 15, a second fluidizer 16, a cyclone separator 17, a cooling device 2, and a measuring device 14 and air compressor 18;

[0074] Wherein, both ends of the hollow metal waveguide 1 are provided with a connecting flange 22, the cyclone separator 17 is arranged at one end of the hollow metal waveguide 1, and connected with the connecting flange 22, and the connecting flange 22 is provided with a sample gas inlet 19;

[0075] The first fluidizer 15 and the second fluidizer 16 are arranged at both ends of the hollow metal waveguide 1, the first fluidizer 15 is connected to the cyclone separator 17, and the second fluidizer 16 is connected to the connecting flange at the other end. Connected, the first fluidizer 15 and the second fluidizer 16 are connected by a connecting pipe 24;

[0076] One end of the flue ga...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Lengthaaaaaaaaaa
Login to view more

Abstract

The invention provides a system and method for detecting the carbon content of fly ash under the dynamic condition of a hollow metal waveguide. The system comprises a bypass measuring unit and a measuring device, wherein the bypass measuring unit and the measuring device can measure the fly ash from a flue in real time. The measurement method comprises the steps of introducing a standard ash sample of the same kind of coal into the hollow metal waveguide for measurement to obtain S21 amplitude or phase data of the standard ash sample, and fitting the data to obtain a fitting relational expression of the standard ash sample at different frequency points; starting an air compressor to introduce the fly ash in the flue into the hollow metal waveguide through an ejector and a cyclone separator, selecting any frequency point through a vector network analyzer to test the introduced fly ash to obtain S21 amplitude or phase data of the measured ash sample, and substituting the S21 amplitude orphase data into the relational expression to calculate the carbon content. Compared with the prior art, the method has higher resolution and test precision, test results of different carbon contentsare stably and obviously distinguished, the carbon content is increased every 2%, the corresponding S21 amplitude parameter is changed by 15-20 degrees, and the precision is better.

Description

technical field [0001] The invention relates to the field of testing the electromagnetic parameters of the carbon content of the fly ash at the tail of a thermal power plant, in particular to a system and method for detecting the carbon content of the fly ash under the dynamic condition of a hollow metal waveguide. Background technique [0002] The carbon content of fly ash is an important parameter reflecting the combustion efficiency of boilers in thermal power plants. Accurate, timely and effective monitoring of the carbon content in fly ash is of great significance for adjusting boiler combustion and improving combustion efficiency. At present, a variety of measurement methods for carbon content in fly ash have been developed, which are mainly divided into two categories: physical measurement and soft measurement. Physical measurement is to use the physical and chemical characteristics of carbon flammability and high dielectric constant to detect the carbon content of fl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N22/00
CPCG01N22/00
Inventor 牛玉广任丹彤胡博盖新华周承玺崔晓
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products