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Pipeline powder coal on-line monitor

A monitoring device and a technology for pulverized coal, which are applied in measurement devices, block/powder supply/distribution, combustion methods, etc., can solve the problems of inability to real-time control the operation status of coal mills and pulverized coal separation devices, and long time consumption.

Inactive Publication Date: 2003-04-09
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This measurement method takes a long time, and in fact, it cannot control the operating status of the coal mill and the pulverized coal separation device in real time to obtain the optimum pulverized coal particle size for combustion

Method used

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  • Pipeline powder coal on-line monitor
  • Pipeline powder coal on-line monitor
  • Pipeline powder coal on-line monitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The pipeline pulverized coal online monitoring device of this embodiment is as follows: figure 1 As shown, it is mainly composed of probe 1, instrument box 2, computer 3, and air source 4. figure 2 The shown optical measurement components include a photoelectric transmitter and a photoelectric receiver. The photoelectric transmitter is composed of a light source 5, a coupling lens 6, an optical fiber 7, and a collimator lens 8. The photoelectric receiver includes a photosensitive detection element 9 and an amplifier 10. The light source 5, coupling lens 6, photosensitive detection element 9 and amplifier 10 are installed in figure 1 In the instrument box 2 shown, the light emitted by the light source 5 passes through the coupling lens 6, then is transmitted to the probe head through the optical fiber 7, and passes through the side of the measurement area 12 after being collimated by the collimating lens 8. Figure 4 The two small holes 11 shown are injected into the p...

Embodiment 2

[0013] It installs optical measurement components at both ends of the measurement area of ​​the probe head, such as image 3 As shown, the photoelectric transmitter is composed of a light source 5 and a collimator lens 8, and the photoelectric receiver includes a photosensitive detection element 9 and an amplifier 10. The light emitted by the light source 5 is collimated by the collimator lens 8 and the light beam passes through the measurement area 12 side like Figure 4 The two small holes 11 shown are injected into the pulverized coal flow in the measurement area 12, and the light beam passes through the small hole 13 on the other side of the measurement area 12 to the photosensitive detection element 9 and is received by the photosensitive detector 9, and then amplified by the amplifier 10 Send it to the computer 3 for processing and calculation through the transmission line 14, and the compressed air used to cool and protect the optical fiber or lens and prevent the small...

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Abstract

A on-line monitoring device for powdered coal in the pipe includes a computer and a probe which is in long and thin rod state with a measuring section at front part and having small holes opened at both sides, and has at one side photoelectric emitter set up and at another side photoelectric receiver set up. The photoelectric receiver is conneted with the computer to check out the pulsating signal of penetrant light intensity relative to the concentration and the grain size of powdered coal particles in the powdered coal airstream. The probe connected with the gas source, the device can monitor the grain size and the concentration of the powdered coal particles in powdered coal airstream and to make the diagnosis for the operation state of powdered coal pipe without any influence on the operation of the machine set.

Description

Technical field: [0001] The invention relates to an on-line monitoring device for pulverized coal in a coal delivery pipeline in a coal-fired boiler in a thermal power plant. Background technique: [0002] The large pulverized coal boilers used in thermal power plants are all equipped with a pulverization system. The pulverized coal from the pulverizer is carried by the carrier air through the pulverized coal pipeline and enters the furnace for combustion. At the same time, the pulverized coal is burned in the boiler with the required combustion air is also fed into the boiler. Therefore, the inhomogeneity of the pulverized coal concentration among the pulverized coal pipelines has a great influence on the combustion of the boiler. If the concentration of pulverized coal in each burner is too different, the combustion will not be well organized, which will cause flame deflection, coking, and unstable combustion. However, if the pulverized coal particle is too large or too ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23K3/02G01N15/02G01N35/00
Inventor 蔡小舒欧阳新
Owner UNIV OF SHANGHAI FOR SCI & TECH
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