Boiler plate heating device and method

Abstract

To provide a boiler panel having improved straightness and flatness. When an alloy coating 14 formed on the single face of the boiler panel 10 with flame coating is welded thereto in a moving heating method, the panel 10 is pulled in a direction Z of the vertical length of a moving inductor 25 to correct the deformation of the panel and a lined position forcing cylinder 21 is used for restricting the displacement of the panel 10 in two-axial directions X, Y intersecting the direction Z at a number of points. The straightness and flatness of the boiler panel 10 are improved by melting treatment while correcting the deformation of the boiler panel, without damaging the alloy coating 14.

Description

technical field [0001] The present invention relates to a boiler plate heating device and a method for manufacturing an alloy-clad boiler plate that heats a boiler plate and a single-sided alloy clad layer thereon by means of moving heating. [0002] The boiler plate is a plate-tube composite plate used to make furnace shells equipped with cooling water channels on various boilers. Multiple plates are welded vertically and horizontally to form the furnace shell. [0003] On the boiler plate, in order to improve the durability of the inner surface of the furnace shell, one side is coated with an autodissolvable alloy of nickel or the like. [0004] In order to efficiently form the alloy clad layer of the boiler plate, it is formed by a thermal spraying step performed first and a deposition heating step (melting treatment step) performed thereafter. That is, first, in the thermal spraying process, the alloy material for forming the upper clad layer is sprayed on the entire area...

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Problems solved by technology

[0015] In this way, in the case of boiler plates, it is a composite structure in which pipes and plates are alternately arranged, and generally has a large size (for example, 0.5m×6m), so in the case of boiler tubes, it is practically equivalent to the above-mentioned protective plate. The reference of auxiliary parts is even more difficult; in addition, there is also the problem of complex shape distortion accompanying the fusion treatment after spraying (for example, refer to Patent Document 2 or Patent Document 3), so there is a problem that it is difficult to consider prefabricated deposition Issues such as the utilization of clad products themselves

[0016] Due to this reason, a water-cooled panel has been developed that uses a high-frequency induction heating device equipped with an inductor as a heating agent for local heating, moves the boiler panel to be heated in the longitudinal direction, and heats it to a desired temperature. However, there is still no device or method that is highly suitable for the melting treatment of the alloy ladle of the boiler plate.

In addition, conventionally, the deformation caused by uneven distribution of heat has been centered, and the bimetallic deformation described later due to the fact that the alloy clad layer of the boiler plate has only one side has not been considered.

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