Flame-stabilizing novel direct-current pulverized coal burner

Abstract

The invention relates to the technical field of burners, and discloses a flame-stabilizing novel direct-current pulverized coal burner. The flame-stabilizing novel direct-current pulverized coal burner comprises a pulverized coal furnace, burner outer shells penetrating through the cavity wall of the pulverized coal furnace are fixedly installed at the four corners of the pulverized coal furnace at equal intervals, the burner outer shells are cuboids with one ends open and the interiors hollow, pulverized coal pipes are fixedly installed in the middle of the closed ends of the burner outer shells, splitter plates are fixedly installed in the pulverized coal pipes at equal intervals, and first side baffle plates are fixedly installed at one ends of outlets of the pulverized coal pipes. According to the lame-stabilizing novel direct-current pulverized coal burner, the splitter plates are arranged in the inner part of the the pulverized coal pipes extending in the inner part of the burnerouter shells, pulverized coal can gather towards one sides of the pulverized coal pipes after colliding with the splitter plates under the splitting action of the splitter plates, then the pulverizedcoal leaves the pulverized coal pipes along with a small amount of primary air, and most primary air can carry a small amount of pulverized coal to leave from the other sides of the pulverized coal pipes, so that the primary air is separated from the pulverized coal, and the concentration of the pulverized coal is improved.

Description

technical field [0001] The invention relates to the technical field of burners, in particular to a novel direct-flow pulverized coal burner with stable flame. Background technique [0002] The pulverized coal furnace is a combustion boiler with pulverized coal as the fuel. The pulverized coal burned in the pulverized coal furnace is ground in advance, and sent into the pulverized coal furnace for combustion through the primary air with the aid of a pulverized coal burner. The commonly used Pulverized coal burners are divided into two types: DC pulverized coal burners and swirl pulverized coal burners. The DC burners are usually arranged at the four corners of the furnace, and the four airflows ejected from the four corners of the burner are formed in the center of the furnace chamber. A "false tangential circle", through the mutual cooperation of four sets of burners, the pulverized coal in the center of the furnace cavity can be fully rotated and burned in the center of the...

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Problems solved by technology

[0003] Because the existing DC pulverized coal burner directly transports the pulverized coal to the furnace cavity for combustion through the primary air, the primary air will mix with the pulverized coal during the process of conveying the pulverized coal, reducing the concentration of the pulverized coal per unit volume, and the coal A large amount of fuel oil is used to support the combustion when the pulverized furnace is ignited and shut down, so that the low concentration of pulverized coal will increase the difficulty of igniting the pulverized coal furnace, which will increase the consumption of fuel oil and increase the cost. After being mixed with the primary air, it directly enters the furnace chamber for simultaneous combustion, so that the pulverized coal is completely burned in the furnace chamber with high temperature and sufficient oxygen, and the combustion reaction is violent, which increases the generation of nitrogen oxides, thereby polluting the environment. The DC burner does not gather and heat up very well, so most of the pulverized coal is burned by the high-temperature flue gas in the furnace cavity after being sprayed into the furnace cavity, which delays the ignition period of the pulverized coal and increases the amount of pulverized coal. The amount of black smoke generated before ignition reduces the combustion efficiency of pulverized coal. In addition, the existing pulverized coal burner makes the combustion unstable when the load of the pulverized coal furnace is lower than 70%. Increase fuel for combustion and further increase fuel consumption

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