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Connection fins for being connected among water-cooled tubes on water-cooled boiler wall, method and boiler

A water-cooled wall and water-cooled pipe technology, applied in the field of heat exchange, can solve problems such as large thermal stress, affecting the safe and stable operation of power plant units, and leakage of cooling pipes

Active Publication Date: 2015-07-22
CHINA SHENHUA ENERGY CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the connecting fins are also cooled by the cooling pipes of the adjacent water-cooled wall, since the connecting fins are arranged in the higher temperature area of ​​the boiler, the heat load received by the water-cooled wall at this position is relatively high, so the resulting Thermal stress is also greater
At the same time, since the connecting fins are connected between the upper water cooling wall and the lower water cooling wall, stress concentration is also likely to occur in the structure, so that the connecting fins are prone to cracks, and even extend to the cooling pipe to cause the cooling pipe to break. Leakage, which seriously affects the safe and stable operation of power plant units

Method used

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  • Connection fins for being connected among water-cooled tubes on water-cooled boiler wall, method and boiler
  • Connection fins for being connected among water-cooled tubes on water-cooled boiler wall, method and boiler

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Embodiment Construction

[0030] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0031] In the present invention, in the case of no contrary description, the used orientation words such as "up, down, left and right" usually refer to the up, down, left and right shown in the accompanying drawings; "inside and outside" Refers to the inside and outside of the outline of each part itself. in, figure 2 The direction indicated by the arrow A in is the outside of the boiler.

[0032] The present invention provides a connecting fin used to connect between the water-cooled tubes 30 of the water-cooled wall of the boiler, such as figure 1 As shown, the connecting fin includes a fin body 10, and a heat insulating sheet 20 is fixed on the inner side...

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Abstract

The invention relates to the field of heat exchange, and discloses connection fins for being connected to a water-cooled boiler wall, a connection fin arrangement method and a boiler. The connection fins comprise fin bodies (10), and the inner side faces, used for facing the boiler, of the fin bodies (10) are fixedly provided with heat-resisting pieces (20). Accordingly, cracks can be prevented from generating effectively, and thus safe operation of the boiler is guaranteed.

Description

technical field [0001] The invention relates to the field of heat exchange, in particular to a connecting fin used for connecting water-cooled tubes of a water-cooled wall of a boiler. In addition, the present invention also relates to a boiler provided with the connection fins and a method for arranging the connection fins. Background technique [0002] In power plant boilers, especially large-scale supercritical variable pressure once-through boilers, the water wall is usually divided into upper and lower parts to meet the requirements of variable pressure operation. Specifically, the lower part is a spiral pipe coil or a water-cooled wall with internal threads, the upper part is a vertical water-cooled wall, and the upper and lower parts are connected by a transition header. By using the transition header, the medium in the cooling pipe of the lower water wall can be fully mixed in the transition header, thereby reducing the thermal stress caused by the temperature diffe...

Claims

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Application Information

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IPC IPC(8): F22B37/10F23M5/08
Inventor 刘鸿国
Owner CHINA SHENHUA ENERGY CO LTD
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