Device for fixing heating surface in supercritical tower type boiler

Abstract

The invention relates to a device for fixing heating surfaces in a supercritical tower type boiler. In the conventional CE technology, horizontal heating surfaces are hung by pipe clamps, angle plates and round steel hanging devices, and the expansion problem cannot be solved. The device for fixing the heating surfaces in the supercritical tower type boiler comprises that: the heating surfaces adopt tower type arrangement and are fixed above a hearth; each level of the heating surfaces in a low-temperature smoke region and a high-temperature smoke region is arranged horizontally; the heating surfaces are hung and fixed sequentially from top to bottom through hanging pipes (3); all the heating surfaces pass through a front water cooled wall or a rear water cooled wall; a heating surface pipe at the position of the water cooled wall is welded with fins of the water cooled wall; the other end expands freely; a hanging device (1) of the heating surface positioned in the low-temperature smoke region is provided with a group of upper coil pipes (4) arranged sequentially; and a hanging device (2) of the heating surface positioned in the high-temperature smoke region is provided with a group of lower coil pipes (5) arranged sequentially. The device is used for fixing the heating surfaces in the supercritical tower type boiler.

Description

technical field [0001] The invention relates to a fixing of a heating surface in a boiler, in particular to a fixing of a heating surface in a supercritical tower boiler furnace. Background technique [0002] The existing CE technology for hanging the horizontal heating surface is to use pipe clips and angle plates and round steel hanging devices, which cannot solve the problem of expansion, and when used in high-temperature flue gas areas, the pipe clips and angle plates are not cooled, so the hanging cannot be realized Uniform heating of the heating surface. The conventional п-type furnace has a tail flue, so that the horizontal heating surface is much shorter and the expansion is very small. Therefore, the hanging device on the heating surface cannot allow the tube to expand freely, resulting in uneven heating. Contents of the invention [0003] The object of the present invention is to provide a 670MW supercritical tower boiler developed in order to make full use of l...

AI Technical Summary

Problems solved by technology

[0002]The existing CE technology to hang the horizontal heating surface is to use pipe clips plus angle plates and round steel hanging devices, which cannot solve the problem of expansion, and are used for high-temperature smoke The air zone, pipe clamps and corner plates are not cooled, and the uniform heating of the hanging heating surface cannot be realized

The conventional п-type furnace has a tail flue, which results in a much shorter horizontal heating surface and a very small expansion. Therefore, the hanging device on the heating surface cannot allow the tube to expand freely, resulting in uneven heating

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