Cyclone combustor with adjustable flame shape and mixing strength

Abstract

The invention provides a cyclone combustor with adjustable flame shape and mixing strength, comprising a central air pipe, a primary air duct, an inner secondary air duct and an outer secondary air duct from inside to outside, wherein an adjustable outer primary air flaring is arranged at the inner side of an outlet of the inner secondary air duct; an adjustable inner secondary air flaring is arranged at the inner side of an outlet of the outer secondary air duct; an adjustable inner tooth-shaped ring is arranged on the central air pipe and an adjustable outer tooth-shaped ring is arranged on a separation plate of the primary air duct; the size of a flaring angle of the adjustable outer primary air flaring and / or the adjustable inner secondary air flaring can be adjusted by axial movement of an outer primary air flaring pull rod and an inner secondary air flaring pull rod, so as to realize the outer flame shape of a combustor nozzle; and axial movement matching and peripheral rotation matching of inner and outer tooth-shape rings are realized through an inner tooth-shaped ring pull rod and an outer tooth-shaped ring pull rod, so as to realize adjustable mixing strength. The cyclone combustor with the adjustable flame shape and mixing strength can guarantee combustion stability and low pollution in a wider range; and the operation property of the combustor can be conveniently and stably adjusted under each operation work condition and a coal type changing condition.

Description

technical field [0001] The invention belongs to the technical field of power plant boiler swirl burners, and in particular relates to a swirl burner with adjustable flame shape and mixing intensity. Background technique [0002] At present, the swirl burner for power plant boilers is widely used as the double-air swirl thick-lean burner, which is equipped with a toothed ring and a pulverized coal concentrator, so as to realize the thick-lean combustion of pulverized coal and strengthen the initial turbulence, helping to burn difficult-to-burn coal type. However, the load of power station boilers is variable, and the supply of coal quality in my country is not stable enough. For burners with a certain design coal type and load, once the coal type or coal quality does not meet the requirements, or low-load operation will lead to combustion deterioration, and even affect combustion efficiency. The formation of pollutants and the safe and stable operation of combustion equipment...

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Problems solved by technology

[0003] In order to solve the defects in the above-mentioned prior art, the object of the present invention is to provide a swirl burner with adjustable flame shape and mixing intensity, which can meet the real-time control requirements of variable coal types and adjustable load in boilers, and can The combustion stability and low pollution are guaranteed in a wide range, and the operating characteristics of the burner can be adjusted conveniently and stably under various operating conditions and changes in coal types.

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