Vertical coal powder corner tube boiler

A corner tube type 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, and large boiler room footprint, so as to improve thermal efficiency, The water cycle is safe and reliable, and the effect of improving the burnout rate

Inactive Publication Date: 2013-04-10
HANGZHOU JUNENG BOILER
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  • Summary
  • Abstract
  • Description
  • 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) The load adjustment range is small, only a single f

Method used

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  • Vertical coal powder corner tube boiler
  • Vertical coal powder corner tube boiler

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Embodiment Construction

[0030] Reference figure 1 , A vertical pulverized coal corner tube boiler, including two burners 17, boiler furnace 13, high temperature air preheater 4, economizer 2, low temperature air preheater 1, convection tube bundle 3, upper header 5 , The top header 7, the drum 8 and the lower header 14, the lower header 14 is arranged at the bottom of the boiler body, the upper header 5 and the top header 7 are arranged on the top of the boiler body, and pass The steam connecting pipe 6 is connected; the burner 17 is arranged in a V-shape; the boiler body adopts a vertical corner tube structure membrane type water wall, four downcomers 12 are arranged at the four corners, the downcomer 12 and the membrane type The two ends of the water wall are respectively communicated with the upper header 5 and the lower header 14; the convection tube bundle 3 adopts flag-surface tubes, and is arranged vertically in series on the outside of the membrane water wall, and the convection tube bundle 3 ...

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Abstract

The invention discloses a vertical coal powder corner tube boiler which comprises combustors, a boiler hearth, a high-temperature air pre-heater, an economizer, a low-temperature air pre-heater convection bank, an upper header, a top header, a boiler barrel and a lower header, wherein the lower header is arranged on the bottom of a boiler body, the upper header and the top header are arranged on the top of the boiler body and are communicated through a steam communicating pipe. The vertical coal powder corner tube boiler is characterized in that the combustors are arranged in a V shape, the boiler body is of a vertical corner type membrane type water-cooling wall structure, four descending pipes are arranged in four corners, the descending pipes and two ends of the membrane type water-cooling wall are respectively communicated with the upper header and the lower heater, the convection bank is arranged on the outer side of the membrane type water cooling wall, the top of the convection bank is communicated with a hearth smoke outlet, and the bottom of the convection bank is communicated with the high-temperature air pre-heater. The vertical coal powder corner tube boiler has the advantages of compact integrated structure, simple appearance arrangement, small occupation area, low steel consumption, large water circulation pressure difference, safety and reliability in water circulation, and the like.

Description

Technical field [0001] The invention belongs to the field of coal-fired industrial boilers, and specifically relates to a vertical pulverized coal corner tube boiler that uses pulverized coal, municipal sludge, and biomass as fuels 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] Traditional industrial coal-fired boilers are mainly layer-fired boilers. The disadvantages are low combustion efficiency and serious pollution, making it difficult to meet the requirements of energy saving, emission reduction and pollutant emission. [0004] Pulverized coal combustion is one of the efficient and clean combustion methods of coal. Its combustion efficiency can reach more than 96%. It is a mature combustion technology and is widely used in large-scale power station boilers. In recent years, pulverized coal combust...

Claims

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Application Information

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IPC IPC(8): F22B31/00F22B31/08
Inventor 苏晓奇王改唐海青沈玉华周海能吴星
Owner HANGZHOU JUNENG BOILER
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