Vertical coal dust corner tube boiler

A corner tube and vertical technology, applied in the field of vertical pulverized coal corner tube boilers, can solve the problems of reducing NOX content, inconvenient cleaning of boiler ash and slag, large boiler room footprint, etc., and achieves simple layout , Safe and reliable water circulation, small footprint

Inactive Publication Date: 2012-08-22
HANGZHOU JUNENG BOILER
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The combustion is not uniform enough, and the temperature difference between front and back is relatively large, which is not conducive to reducing NO X Content
[0006] 2) Th

Method used

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  • Vertical coal dust corner tube boiler
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  • Vertical coal dust corner tube boiler

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Embodiment Construction

[0024] refer to figure 1 , a vertical pulverized coal corner tube boiler, including two burners 16, a boiler body, an air preheater 1, a waste water tank 2, a convection tube bundle 3, an upper header 4, a top header 6, a drum 7 and The lower header 13, the lower header 13 is arranged at the bottom of the boiler body, the upper header 4 and the top header 6 are arranged at the top of the boiler body, and communicated through the steam connecting pipe 5; the combustion The device 16 is arranged at the bottom of the boiler body; the boiler body adopts a vertical "Π"-shaped membrane water wall structure, and four downcomers 11 are arranged at the four corners, and the two ends of the downcomer 11 and the membrane water wall are respectively It communicates with the upper header 4 and the lower header 13; the convection tube bundle 3 adopts flag tubes and is arranged vertically on the outside of the membrane water wall, and the top of the convection tube bundle 3 and the boiler ch...

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Abstract

The invention discloses a vertical coal dust corner tube boiler, which comprises a burner, a boiler body, an air preheating device, a waste heat water tank, a convection bank, an upper collecting box, a top collecting box, a boiler barrel and a lower collecting box. The lower collecting box is arranged at the bottom of the boiler body, and the upper collecting box and the top collecting box are arranged on top of the boiler body and communicated through a steam communicating pipe. The vertical coal dust corner tube boiler is characterized in that the burner is arranged at the bottom of the boiler body which adopts a vertical film type water cooling wall structure, four lowering pipes are arranged at four corners, and two ends of the lowering pipe and the film type water cooling wall are communicated with the upper collecting box and the lower collecting box respectively. The convection tube bundle is arranged outside the film type water cooling wall, the top of the convection tube bundle is communicated with a boiler chamber smoke outlet, and the bottom of the convection tube bundle is communicated with the waste heat water tank. The vertical coal dust corner tube boiler has the advantages of being compact in integral structure, simple in appearance display, small in covered area, low in steel consumption, big in boiler water circulation pressure difference and safe and reliable in water circulation and the like.

Description

technical field [0001] The invention belongs to the field of coal-fired industrial boilers, and in particular relates to a vertical pulverized coal corner tube boiler which uses coal powder, urban sludge, and biomass as fuel for generating steam. Background technique [0002] my country's energy structure is dominated by coal. For a long time in the future, coal-fired industrial boilers will still be the leading product of industrial boilers. [0003] The traditional industrial coal-fired boilers are mainly layer-fired boilers. The disadvantages are low combustion efficiency and serious pollution, which makes it difficult to meet the requirements of energy saving, emission reduction and pollutant discharge. [0004] Pulverized coal combustion is one of the efficient and clean combustion methods of coal, and its combustion efficiency can reach more than 96%. It is a mature combustion technology and is widely used in large-scale power plant boilers. In recent years, pulverize...

Claims

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Application Information

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IPC IPC(8): F22B31/00
Inventor 王改吴星苏晓奇沈玉华
Owner HANGZHOU JUNENG BOILER
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