Circularly swirling coal powder burn device with various concentration coal powder pipe

Abstract

The utility model relates to a circular swirl thick and thin coal powder burner, which relates to a swirl pulverized coal combustion device. In the present invention, a separation partition is arranged in the primary air pulverized coal pipe to divide the primary air pipe into the upper and lower thick and light pulverized coal pipelines, and a reducer for uniform pulverized coal flow is arranged in the concentrated pulverized coal pipeline. A wedge-shaped body is formed between the bottom and the separating partition; fixed swirl vanes are set in the light coal powder pipeline at the lower part of the primary air duct, and movable and adjustable swirl vanes are set in the secondary air duct, and A rotating body with curved grooves on the inner surface is arranged on the wall surface of the front end of the swirl vane of the secondary air duct. The invention can effectively reduce the NO of pulverized coal furnace x emissions without significantly increasing the carbon content of fly ash; at the same time, when burning low-volatile pulverized coal, it effectively solves the problems of low-load ignition and stable combustion, and reduces the resistance and wear of the primary air duct, thereby improving the service life of the combustion equipment and equipment performance costs.

Description

technical field [0001] The invention relates to a boiler pulverized coal combustion equipment, in particular to a swirling thick and thin pulverized coal burner. Background technique: [0002] At present, the swirl pulverized coal burners with hedging arrangement on the market mainly include: Beijing Bawei Co., Ltd.'s double air-adjusting pulverized coal burner, and the radial thick and thin pulverized coal burner of Harbin Institute of Technology. [0003] The main structure of the double air-adjusting pulverized coal burner of Beijing Bawei Company is a circular structure. From the inside to the outside, there are primary air duct, inner secondary air duct and outer secondary air duct. There are swirl blades in the inner and outer secondary air ducts; there is no central tube in the primary air duct, and the oil gun is arranged in the secondary air duct and on the upper side of the primary air duct. The advantages of this structure are: there is no pipe in the primary air...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies and defects of the prior art, the object of the present invention is to provide a circular swirling thick-lean pulverized coal burner, which can solve the problems of low-load ignition and stable combustion when burning low-volatile coal pulverized coal, and further reduce NO x generation, reducing the resistance and wear of the primary air duct

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