A Method for Measuring the Metal Wall Temperature of Boiler Heating Surface
A heating surface, boiler technology, applied in the direction of measuring heat, measuring devices, thermometers with electrical/magnetic components directly sensitive to heat, etc., to avoid additional errors, small measurement errors, and prolong service life.
Active Publication Date: 2021-01-15
TSINGHUA UNIV
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The biggest problem with this invention is the high temperature binder
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[0026] The specific embodiment of the present invention and working process will be further described below in conjunction with accompanying drawing.
[0027] The orientation terms such as up, down, left, right, front and rear in this application document are established based on the positional relationship shown in the drawings. If the drawings are different, the corresponding positional relationship may also change accordingly, so this should not be understood as limiting the scope of protection.
[0028] The invention provides a method for directly measuring the metal wall temperature of the heating surface of the boiler by fixing the thermocouple on the outer wall surface of the heating surface of the boiler by depositing metal. The thermal conductivity of the materials selected for the deposited metal is not less than 21W / m·K.
[0029] The boiler heating surface 1 includes one or more of a water wall, an economizer, an evaporator, a superheater, and a reheater. The heat...
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Abstract
The invention discloses a method for measuring the metal wall temperature of the boiler heating surface. Place the thermocouple wall-mounted on the metal wall of the boiler heating surface to be tested, and attach the end of the thermocouple to the point to be measured on the metal wall of the boiler heating surface; melt the deposited metal and lay it on the surface of the thermocouple to form a cladding layer , so that the thermocouple is fixed with the wall of the heating surface of the boiler and conducts heat; the lead end of the thermocouple is extended outside the heating surface of the boiler, and is connected with a recording device arranged outside the heating surface of the boiler to read and / or record the thermoelectric Obtain the temperature of the point to be measured on the heating surface of the boiler through the reading of the pair. The thickness of the deposited layer of the deposited metal is evenly distributed along the axial direction of the heated tube to be tested with the thermocouple as the central axis, and the deposited metal forms a cladding layer with a thickness of at least 1 mm on the surface of the thermocouple. The cross section of the cladding layer is circular, semicircular, crescent or hemispherical. The invention has the advantages of high measurement accuracy, wear resistance, long service life and the like.
Description
technical field [0001] The invention relates to a method for measuring the metal wall temperature of a heating surface of a boiler, in particular to the measurement of the metal wall temperature of the heating surface of a circulating fluidized bed boiler furnace and a heat exchange bed, and belongs to the technical field of boiler measurement. Background technique [0002] The temperature of the metal wall surface of the boiler heating surface must be lower than the maximum required temperature of the metal material, otherwise the strength of the material will decrease, plastic deformation will occur or even the tube will burst. Therefore, the wall temperature of the heating surface is a parameter that needs to be strictly monitored and controlled during the operation of the boiler. With the improvement of boiler parameters, the use temperature of metal materials is getting higher and higher, getting closer to the use limit of materials, and the accuracy of wall temperature...
Claims
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IPC IPC(8): G01K7/02
CPCG01K7/02
Inventor 姚禹歌吕俊复张扬陈书洁张缦杨海瑞
Owner TSINGHUA UNIV