Burner arrangement method and arrangement structure for power station boiler

Abstract

The invention discloses a burner arrangement method and arrangement structure for a power station boiler. The method disclosed by the invention is characterized in that a pulverized coal burner is arranged by adopting a manner of combining tangential combustion and opposed combustion. The burner arrangement method and arrangement structure disclosed by the invention have the beneficial effects that combustion stability and economy problems of a boiler are solved firstly and less NOx is discharged. By virtue of massive research and calculation by the inventor, results show that the tangential combustion manner has better economy and less NOx discharge but has poor combustion stability, if the combustion stability is better and a flame is used for supporting combustion, the characteristics of the tangential combustion can be fully played. A symmetric combustion manner has better whole combustion stability as a single burner has stronger combustion stabilizing capability and has poor combustion economy as a combustion stroke is shorter, and NOx discharge is higher as a local high temperature region is formed by higher power of the single burner. Thus, if the advantages of the two combustion manners are combined to form a new combustion manner, better combustion effects can be achieved.

Description

technical field

[0001] The invention relates to a burner arrangement method and arrangement structure of a power station boiler, belonging to the field of boiler combustion and design. Background technique

[0002] At present, the main combustion methods of power plant boilers are tangential and hedging. There are two ways of tangent circles: four-corner tangent circle and furnace double tangent circle; symmetry has two ways: front and rear wall horizontal symmetry and W flame symmetry. Both tangential and hedging combustion methods have their own advantages and disadvantages. The four-corner tangential combustion is supported by the upstream and downstream to form a stable combustion flame. The flame rotates in the furnace to make the flame stroke long, the combustion economy is high, and the NOx content is low; but the anti-interference ability of the combustion is low, and because of the tangential The temperature of the furnace outlet caused by combustion has a large d...

Examples

Embodiment Construction

[0018] Embodiments of the invention: as figure 1 As shown, the burner arrangement method of the utility boiler is to arrange the pulverized coal burner in the way of tangential combustion and opposite combustion. The specific method is that the tangential combustion is located in the center of the furnace, and four pulverized coal burners located in the center of the furnace form a four-corner tangential combustion technology; the opposing combustion is located on both sides of the furnace, and one or two symmetrical pulverized coal burners can be installed on each side , forming a hedging combustion technique.

[0019] The burner arrangement structure of the power plant boiler is as follows: a pulverized coal burner 2 is arranged on the front and rear walls of the furnace 1, and four pulverized coal burners 2 are arranged at the center of the front and rear walls of the furnace 1 to form a tangent circle, forming a four-cornered tangent circle. Combustion technology structu...

technical field

[0001] The invention relates to a burner arrangement method and arrangement structure of a power station boiler, belonging to the field of boiler combustion and design. Background technique

[0002] At present, the main combustion methods of power plant boilers are tangential and hedging. There are two ways of tangent circles: four-corner tangent circle and furnace double tangent circle; symmetry has two ways: front and rear wall horizontal symmetry and W flame symmetry. Both tangential and hedging combustion methods have their own advantages and disadvantages. The four-corner tangential combustion is supported by the upstream and downstream to form a stable combustion flame. The flame rotates in the furnace to make the flame stroke long, the combustion economy is high, and the NOx content is low; but the anti-interference ability of the combustion is low, and because of the tangential The temperature of the furnace outlet caused by combustion has a large d...

Examples

Embodiment Construction

[0018] Embodiments of the invention: as figure 1 As shown, the burner arrangement method of the utility boiler is to arrange the pulverized coal burner in the way of tangential combustion and opposite combustion. The specific method is that the tangential combustion is located in the center of the furnace, and four pulverized coal burners located in the center of the furnace form a four-corner tangential combustion technology; the opposing combustion is located on both sides of the furnace, and one or two symmetrical pulverized coal burners can be installed on each side , forming a hedging combustion technique.

[0019] The burner arrangement structure of the power plant boiler is as follows: a pulverized coal burner 2 is arranged on the front and rear walls of the furnace 1, and four pulverized coal burners 2 are arranged at the center of the front and rear walls of the furnace 1 to form a tangent circle, forming a four-cornered tangent circle. Combustion technology structu...

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