Protective plate for coal falling opening of circulating fluidized bed boiler and preparation device and method of protective plate

Abstract

The invention discloses a protective plate for a coal falling opening of a circulating fluidized bed boiler and a preparation device and method of the protective plate. The protective plate comprises a heat-resistant steel base plate and reinforcing filler, a plurality of linear groove arrays are sequentially formed in the upper surface of the heat-resistant steel base plate from left to right, and each linear groove array comprises a plurality of grooves which are sequentially arranged along a straight line. Each groove is cylindrical, the reinforcing filler is arranged in the grooves through laser cladding, the radius r of each groove is 3-6 mm, the depth of each groove is 3-4 mm, the reinforcing filler is 1-2 mm higher than an opening of each groove, and the depth of each groove is gradually reduced from left to right. The height difference between the top of the reinforcing filler and the opening of each groove is only 1-2 mm, so that although the reinforcing filler slightly higher than the opening of each groove hinders the coal, the coal is decelerated in the process of colliding with the coal, abrasion of the coal to the upper surface of the heat-resistant steel base plate is reduced, and the coal cannot be prevented from sliding on the upper surface of the heat-resistant steel base plate.

Description

technical field [0001] The invention relates to a protective plate for a coal drop port of a circulating fluidized bed boiler, a preparation device and a preparation method thereof, and belongs to the field of tableware. Background technique [0002] As a part of the coal conveying channel, the protective plate installed at the coal drop port of the circulating fluidized bed boiler is continuously scoured by the coal material during the operation of the boiler, resulting in serious wear of the protective plate. At the same time, considering the internal temperature environment of the boiler, the material of the protective plate is usually heat-resistant steel 0Cr25Ni20 to improve its high-temperature oxidation resistance, but the low hardness of heat-resistant steel 0Cr25Ni20 will further aggravate its wear. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a protectiv...

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Problems solved by technology

[0002] As a part of the coal conveying channel, the protective plate installed at the coal drop port of the circulating fluidized bed boiler is continuously washed by the coal material during the operation of the boiler, resulting in serious wear of the protective plate

At the same time, considering the internal temperature environment of the boiler, the material of the protective plate is usually heat-resistant steel 0Cr25Ni20 to improve its high-temperature oxidation resistance, but the low hardness of heat-resistant steel 0Cr25Ni20 will further aggravate its wear condition

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