Ejection type whole negative pressure air powder mixer

Abstract

The invention provides an ejection type whole negative pressure air powder mixer, which comprises a body used for introducing powder conveying air; the powder conveying air is introduced into the front end of the body; the back end of the body is connected with the front end of a powder conveying air ejection pipe; the back end of the powder conveying air ejection pipe is a throat spraying opening; an outer cover communicated with the throat spraying opening is arranged outside the powder conveying air ejection pipe; a coal powder material falling pipe is connected to the side wall of the outer cover. The ejection type whole negative pressure air powder mixer is characterized in that a regulation mechanism is also arranged outside the power conveying air ejection pipe; through the regulation mechanism, the powder conveying air ejection pipe can realize the position regulation in the axial direction and can be fixed. Compared with the prior art, the ejection type whole negative pressureair powder mixer has the advantages that the problem of the positive pressure powder support phenomenon of the existing air powder mixer can be effectively solved; the mixer ejection intensity and the practical conveyance energy consumption can be regulated according to the practical wind powder mixing concentration and the practical coal powder conveying resistance; the reliable guarantee can beprovided for the stable smooth and economic conveyance of the coal powder.

Description

technical field [0001] The invention belongs to the technical field of pulverized coal furnaces, and in particular relates to an injection type full negative pressure wind powder mixer. Background technique [0002] For pulverized coal furnaces, especially industrial pulverized coal furnaces, due to the small number of burners and relatively small combustion power, some even have only one burner, so the combustion fluctuation of the burner will directly affect the safe and stable operation of the boiler. As the main equipment in the pneumatic powder feeding link of pulverized coal furnace, the air powder mixer plays an important role. [0003] At present, most of the traditional pallet-type air-powder mixers are commonly used in the field of pulverized coal industrial boilers. The mixers of this structure are in the form of positive pressure or slight negative pressure. The powder air rushes up to the feeding pipe and the powder feeding equipment, forming a phenomenon of po...

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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an ejector-type full negative pressure air-powder mixer, which solves the phenomenon of positive-pressure powder support that often occurs during the pneumatic powder feeding process of pulverized-coal boilers, and eliminates the The problem of uneven powder supply or broken powder caused by the phenomenon of positive pressure supporting the powder provides a reliable guarantee for the stable combustion operation of the pulverized coal furnace

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