Vertical type modular coal water slurry corner tube boiler

Abstract

The invention discloses a vertical type modular coal water slurry corner tube boiler. The vertical type modular coal water slurry corner tube boiler comprises a boiler body, a hearth, a combustor, a combustion stabilizing chamber, a dry bottom hopper, an air preheater, a coal economizer, a convection tube beam, an upper collecting tank, a top collecting tank, a boiler barrel and a lower collecting tank. The boiler body comprises 4 down pipes arranged at four corners and a membrane water wall. Two ends of each down pipe and two ends of the membrane water wall are respectively communicated with the upper collecting tank and the lower collecting tank. The convection tube beam is arranged on outer side of the membrane water wall, the top is communicated with a smoke outlet of the hearth, and the bottom is communicated with the bottom of the air preheater. The dry bottom hopper is arranged at the bottom of the boiler body. The boiler body is divided into the boiler barrel, the dry bottom hopper, the convection tube beam and the membrane water wall to be manufactured and installed. The vertical type modular coal water slurry corner tube boiler has the advantages of being compact in integral structure, simple in appearance arrangement, small in occupied area, low in steel consumption, large in boiler water circulating differential pressure, safe and reliable in water circulation, quick and simple in manufacture and installation, reliable in boiler operation, simple and convenient to maintain 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 modular coal-water slurry corner-tube boiler which uses coal-water slurry of various grades as fuel and is used to generate 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] Coal-water slurry combustion is one of the efficient and clean combustion methods of coal, and its combustion efficiency can reach more than 98%. It is a mature combustion technology and is widely used in large-scale power plant boilers. In recen...

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, and only a single grade of coal-water slurry fuel can be used

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

[0008] 4) Large consumption of boiler steel and furnace wall materials

[0009] 5) The boiler room occupies a large area and the cost of civil construction is high

[0010] 6) The sealing performance of the boiler is not good, the air leakage of the brick wall is large, the heat loss of the boiler is large, and the power consumption of the induced draft fan is large

[0011] 7) It is inconvenient to manufacture and install the SHS double-drum bulk water tube boiler

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