Vertical coal powder corner tube boiler

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...

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 fuel - pulverized coal can be used

[0007] 3) Boiler ash and slag cleaning is inconvenient

[0008] 4) The boiler room occupies a large area

[0009] 5) The bottom of the furnace is easy to coke

[0010] 6) It is difficult to overhaul the burner

Images