Pulverized coal concentrator and pulverized coal burner applying same

Abstract

The invention discloses a pulverized coal concentrator used for realizing concentration and dilution separation of solid fuel, which comprises a main body (1) with a spacial geometrical structure; the main body comprises a windward side (2) and a leeward side (3); and at least one deflector hole (4) is formed between the windward side (2) and the leeward side (3) of the main body (1). Because a principle of concentration impact guided separation is applied, the resistance is obviously reduced, and the size of the pulverized coal concentrator is conveniently adjusted flexibly in a certain specification range. The invention also discloses a pulverized coal burner applying the pulverized coal concentrator.

Description

technical field [0001] The invention relates to the technical field of pulverized coal burners, in particular to a pulverized coal concentration device and a pulverized coal burner using the device. Background technique [0002] In order to achieve stable combustion and reduce the formation of nitrogen oxides (NOx), the pulverized coal burner of the coal-fired boiler generally adopts a pulverized coal concentration device to make the pulverized coal form a specific thick-lean separation characteristic inside the burner and near the nozzle. The performance of the pulverized coal concentration device will directly affect the overall performance of the pulverized coal burner. The pulverized coal concentrating device for the separation of gas and solid two-phase flow used in conventional pulverized coal boilers generally adopts the structure of elbows and shutters. Among them, the elbow structure uses the separation and concentration of pulverized coal particles when passing th...

AI Technical Summary

Problems solved by technology

Among them, the elbow structure uses the separation and concentration of pulverized coal particles when passing through the elbow due to the difference in inertia of the gas-solid two-phase flow, which has the disadvantage of limited space arrangement

The louver-type gas-solid two-phase flow separation and concentration device is equipped with multiple concentration grids in the combustion tube. The complex structure of the device easily leads to coal dust deposition, and has the disadvantages of poor separation and concentration effects, large air flow channel resistance and poor wear resistance.

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