Flue gas recirculation boiler structure of combustor

Abstract

The invention relates to the technical field of flue gas recirculation in a boiler, in particular to a flue gas recirculation boiler structure of a combustor, and the flue gas recirculation boiler structure can reduce a hearth temperature without increasing a hearth temperature so as to control slagging generation and reduce cost. The flue gas recirculation boiler structure comprises the hearth; a main combustor is mounted on the hearth; the main combustor comprises a primary air interface and a secondary air interface; an air outlet direction of the primary air interface and an air outlet direction of the secondary air interface are positively tangential to a tangent circle of the main combustor; four flue gas recirculation spray holes which are uniformly distributed are formed above the main combustor; and the air outlet directions of the flue gas recirculation spray holes are reversely tangential to the tangent circle of the main combustor separately.

Description

technical field [0001] The invention relates to the technical field of flue gas recirculation in boilers, in particular to a burner flue gas recirculation boiler structure. Background technique [0002] In pulverized coal boilers, the phenomenon that softened or semi-molten ash sticks to the heating surface is called coking. Coking is one of the main reasons that seriously affect the safety and economic operation of boilers. Some power plant boilers in my country have different degrees of coking phenomena. Some power plants have reduced boiler output by 10% to 20% and thermal efficiency by 1% to 2.5% due to severe coking. Individual boilers with relatively serious coking not only affect the normal operation, but also are forced to use directional blasting methods when the boiler is shut down to clean the coke, which can easily cause destructive consequences. The conventional method of solving boiler coking generally adopts a larger and higher furnace, which greatly increase...

AI Technical Summary

Problems solved by technology

Coking is one of the main reasons that seriously affect the safety and economic operation of boilers. Some power plant boilers in my country have different degrees of coking phenomena. Some power plants have reduced boiler output by 10% to 20% and thermal efficiency by 1% to 2.5% due to severe coking.

Individual boilers with relatively serious coking not only affect normal operation, but are forced to adopt directional blasting methods when the boiler is shut down to clean coke, which can easily cause destructive consequences

The conventional method of solving boiler coking generally adopts a larger and higher furnace method, which greatly increases the cost of the boiler

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