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Device and method for detecting coking condition of water-cooled wall based on mid-infrared holographic imaging

A holographic imaging and water-cooled wall technology, which is applied in measurement devices, optical devices, phase influence characteristic measurement, etc., to reduce coking, improve operating efficiency, and reduce equipment loss and accidents.

Active Publication Date: 2021-05-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a lack of a method and device that can comprehensively and accurately judge the coking position and severity of boiler water wall

Method used

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  • Device and method for detecting coking condition of water-cooled wall based on mid-infrared holographic imaging
  • Device and method for detecting coking condition of water-cooled wall based on mid-infrared holographic imaging

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Embodiment 1

[0052] The device and method for detecting coking of the water wall based on mid-infrared holographic imaging provided in this embodiment are as follows: figure 1 with figure 2 shown.

[0053] Specifically, in this embodiment, the laser light with a wavelength of 10.6 μm emitted by the carbon dioxide laser 1 is divided into two laser beams by the beam splitter 3, which are respectively transmitted light and reflected light, and the intensity ratio of the two is 9:1; the transmitted light After passing through the first focusing lens 4, divergent incident light is formed, passes through the fire viewing hole 13 on the water cooling wall, and irradiates on the measured area 15 of the furnace water cooling wall. The focal length of the first focusing lens 4 can be determined according to The size and distance are selected; the incident light is scattered by the surface of the water wall or the coke surface 16 to form the object light, and after passing through the narrow-band f...

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Abstract

The invention discloses a device for detecting the coking condition of a water-cooled wall based on mid-infrared holographic imaging. The device comprises a laser generation unit, a light path processing unit and a signal receiving and processing unit; the laser generation unit comprises a laser device used for generating a mid-infrared wavelength laser beam; the light path processing unit comprises a spectroscope, a laser attenuation sheet, an optical lens and a sensor array; the mid-infrared wavelength laser beam is divided into incident light and reflected light through the spectroscope; the incident light passes through an optical lens and then irradiates a detected water-cooled wall area to be scattered to form object light, the object light irradiates the sensor array to form an object light field; the reflected light passes through the attenuation piece and the optical lens and then irradiates the sensor array to form a reference light field, and generates a holographic interference pattern through interference; and the signal receiving and processing unit is used for collecting the holographic interference pattern and obtaining the coking position and thickness information of the detected water-cooled wall area. The invention further discloses a method for detecting the coking condition of the water-cooled wall based on mid-infrared holographic imaging. The device and the method can quickly and accurately detect the coking position and degree of the water-cooled wall of a hearth when a boiler runs and temporarily stopped.

Description

technical field [0001] The invention relates to the field of boiler applications, in particular to a device and method for detecting coking of a water wall based on mid-infrared holographic imaging. Background technique [0002] In the operation of coal-fired industrial boilers, when the molten ash particles leave the flame-heated surface and meet the water-cooled wall, they are cooled and attached to the heated surface of the tube wall or furnace wall. This phenomenon is called coking. Coking of the water-cooled wall of the coal-fired boiler is one of the important problems affecting the combustion process of the boiler. It deteriorates the combustion state of the boiler, reduces the efficiency of the boiler, disrupts the normal operation of the working medium, and causes damage to the boiler water-cooled wall, superheater and other equipment. In serious cases It will also cause the boiler to shut down in an accident due to the accumulation of coke blocks until the furnace ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/45G01B11/00G01B11/06G01B11/24
CPCG01N21/453G01B11/00G01B11/06G01B11/2441Y02A90/30
Inventor 吴学成吴迎春高翔曾磊林文辉薛志亮周永刚郑成航陈玲红邱坤赞岑可法
Owner ZHEJIANG UNIV
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