Condense-dilute type double-cyclone cylinder pulverized coal burner and pulverized coal boiler using same

Abstract

The invention discloses a condense-dilute type double-cyclone cylinder pulverized coal burner which comprises a pulverized coal entrance channel, a pulverized coal concentrator and two cyclone separation type burners communicated with the pulverized coal entrance channel. The burner is characterized in that the pulverized coal concentrator is arranged in the pulverized coal entrance channel; and a blade in the pulverized coal concentrator inclines towards the side away from a boiler side wall and a wing wall adjacent to the pulverized coal concentrator along the flowing direction of pulverized coal so as to divide a pulverized coal airflow into a condense part and a dilute part. The invention changes a traditional double-cyclone cylinder burner into a condense-dilute type and has more obvious effect on reducing the discharge of NOx. Aiming at the reformation of an original burner, the condense-dilute type double-cyclone cylinder pulverized coal burner is the equipment having smallest changes, lowest cost and easiest implementation, a more effective measure for solving side (wing) wall coking under a current coal condition and can create a good condition for the safe and stable operation of boilers.

Description

technical field [0001] The invention relates to the improvement of the structure of the burner in the boiler, in particular to a burner which can reduce the coking condition of the side wall of the boiler wing. Background technique [0002] At present, the W-flame boilers that have been put into operation (including 300,000 and 600,000) all have the problem of coking on the wing wall, especially the wing wall, such as Figure 4 As shown, the coking zone 16 is mainly located in the range indicated by the dotted line in the figure, that is, adjacent to the wing and side walls. Some boilers have very serious coking and high temperature corrosion, which has seriously affected the safe operation of the boiler. [0003] The reason for the coking problem of the wing side wall is that on the one hand, the temperature in the part of the side wall under the arch is high and the oxygen concentration is very low, presenting a reducing atmosphere; , so that the pulverized coal flame sco...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the coking problem of the W-type flame boiler wing side wall in the prior art, and propose a thick-thin double-cyclone pulverized coal burner and a thick-thin double cyclone tube pulverized coal burner that can solve the problem of coking on the side (wing) wall of the boiler unit and ensure the safe operation of the unit. Pulverized coal boiler using this burner

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