Adjustable air and powder mixer

Abstract

The invention relates to a preparation method of massive or powdery fuel used for fuel-burning equipment, in particular to an adjustable air and powder mixer which is structurally characterized by also comprising an adjustable baffle and an operating member, wherein one end part of the adjusting baffle is hinged with one end part of a fixed baffle, the other end part of the adjusting baffle is a movable end connected with the operating member. The invention has the advantages that the adjustable air and powder mixer is provided with the adjustable baffle, and the adjusting baffle swings up and down through operating the operating member of the adjustable baffle by taking a hinged end as a fulcrum, thereby changing the effective section area for the flow of the air flow of an air box, and further controlling the air pressure of the air box to a mixed cavity to match with the powder feeding pressure of a powder feeding tube so as to ensure that the pressure from bottom to top inside the powder feeding tube and the pressure from top to bottom inside the powder feeding tube are in needed balance to achieve the technical aim of smooth and uniform powder feeding of the powder feeding tube.

Description

technical field [0001] The invention relates to the preparation of block or powder fuel for combustion equipment, in particular to an adjustable wind powder mixer. Background technique [0002] The air-powder mixer in the prior art includes a lower powder pipe, a mixing cavity and a bellows. The mixing cavity is a cylinder placed horizontally, and the cylinder is a cylinder with an upward opening. The powder pipe is connected and communicated. There is a fixed baffle in the inner cavity of the cylinder, which is located below the opening and parallel to the opening plane. The bellows is connected to one side of the cylinder and communicated with the cylinder to blow in the wind. The other side of the cylinder end connection to the burner. [0003] When in use, the powder feeder drops coal powder through the powder lowering pipe, and the coal powder falls on the baffle, and a certain amount of wind is blown into the bellows, and the wind mixes with the powder and then enters...

AI Technical Summary

Problems solved by technology

However, this prior art has the following deficiencies: the volumetric powder feeder commonly used in China will form a gap between the dynamic and static parts due to wear and tear after being used for a period of time. It affects the pressure at the powder lowering pipe, thereby affecting the amount of powder lowering. This is because the powder flow in the powder lowering pipe is not only from top to bottom, but also from bottom to top. The closer the flow from bottom to top is to The outlet of the powder lowering pipe (the opening of the mixing chamber) has a larger flow rate, and the powder lowering volume is the difference between the downward and upward pulverized coal flow of any section

At this time, under the action of factors such as the wind pressure of the bellows, the resistance of the downstream pipeline, and the pressure of the furnace, the pressure at the powder lowering pipe will change, which will lead to a change in the pressure from the bottom to the top, making the powder lowering unsmooth and uneven.

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