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

Abstract

The invention supplies a circular eddy flow thick / thin coal dust burner that refers to an eddy flow coal dust burning device. The invention set a splitter plate that separates the primary air main to up and down thin / thick coal dust conduit in the primary coal dust air main. A reducer is used to flare out the coal dust air current in the thick coal dust conduit. The bottom of the reducer forms a wedge type with the splitter plate. A fixed eddy flow vane is set in the thin coal dust conduit at the bottom of the primary air main. And the active and modified eddy flow vane on which has rolling body with cam slot channel on its surface is set in the secondary air main. The invention could effectively reduce the release of carbon x-oxide from the coal dust burner, while not obviously increase the carbon content of the fly ash. And it solves the problem of under-load inflammation, stably burning and reducing the resistance and abrasion of the primary air main while burning the low-volatile coal dust. Thus, the useful life and the burning device performance cost of the burning device is increased.

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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