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Angle tube type boiler coiler convection heating surface flue gas channel variable cross-section structure

A flue gas channel, serpentine tube technology, used in steam boilers, steam boiler accessories, steam boiler components, etc.

Active Publication Date: 2013-06-05
绿源能源环境科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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  • Angle tube type boiler coiler convection heating surface flue gas channel variable cross-section structure
  • Angle tube type boiler coiler convection heating surface flue gas channel variable cross-section structure
  • Angle tube type boiler coiler convection heating surface flue gas channel variable cross-section structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the present invention provides a variable cross-section structure of flue gas channels on the convective heating surface of the convective heating surface of a corner tube boiler. The form is that the middle is a serpentine tube convection heating surface formed by connecting the upper circuit serpentine tube 1-1 and the lower circuit serpentine tube 1-2, and the upper and lower ends of the double circuit serpentine tube are connected to the header 2 respectively. , 3 connections, the flue gas passage of the lower circuit serpentine pipe is narrower than the upper circuit serpentine pipe flue gas passage.

Embodiment 2

[0034] Such as figure 2 As shown, the lower circuit serpentine pipe 1-1 and the upper circuit serpentine pipe 1-2 are connected through the intermediate header 4, and the number of the lower circuit serpentine pipes is increased on the basis of the number of the upper circuit serpentine pipes, that is, the lower circuit The number of serpentine pipes is more than that of the upper circuit serpentine pipes, and the flue gas passage of the lower circuit serpentine pipes is narrower than that of the upper circuit serpentine pipes.

Embodiment 3

[0036] Such as image 3 As shown, the lower circuit serpentine pipe 1-1 and the upper circuit serpentine pipe 1-2 are connected through the intermediate header 4, and the diameter of the lower circuit serpentine pipe is increased on the basis of the diameter of the upper circuit serpentine pipe, namely The pipe diameter of the lower circuit serpentine pipe is larger than that of the upper circuit serpentine pipe, and the section of the flue gas channel of the lower circuit serpentine pipe is narrower than that of the upper circuit serpentine pipe.

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PUM

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Abstract

The invention discloses an angle tube type boiler coiler convection heating surface flue gas channel variable cross-section structure. A coiler is adopted in the angle tube type boiler convection heating surface structure. A double-loop or multi-loop coiler convection heating surface is arranged in the middle. The upper end and the lower end of the coiler with the double-loop or multi-loop are respectively connected with a collecting box. The cross-section of a lower-loop coiler flue gas channel is narrower than that of an upper-loop coiler flue gas channel. Due to the fact that the lower-loop coiler flue gas channel is narrowed down in order to improve speed of flue gas and achieve heat transfer at the speed of the flue gas (the speed of the flue gas at an outlet is not smaller than 7m per second). Fly ash deposition is reduced, a heat transfer coefficient is increased, heat transfer efficiency of a convection bank is ensured, and heat exchange efficiency is improved.

Description

technical field [0001] The invention relates to a variable section structure of a convection heating surface of a serpentine tube of an angle tube boiler. Background technique [0002] Corner tube boiler (corner tube boiler): a boiler that is mainly composed of large-diameter thick-walled downcomers located at the four corners of the boiler to form a frame to support the overall weight. Also known as tube frame boiler. [0003] Corner tube boiler is a new type of boiler structure. The downcomers of the boiler are arranged on the four corners of the boiler, not only as a water circulation channel, but also as a supporting frame of the boiler. The boiler with unheated downcomers arranged on the corners and self-supporting is called a corner tube boiler. The boiler drum is external, the furnace is a fully enclosed membrane wall structure, the convection heating surface adopts the gas surface tube structure, no steel frame, the water circulation is unique and safe, the startup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B37/00
Inventor 郭强
Owner 绿源能源环境科技集团有限公司