Blade structure, drying drum and drying equipment

Abstract

The invention relates to a blade structure, a drying drum and drying equipment. The blade structure comprises a drum body; multiple blades are arranged in the drum body; an included angle between a datum line of an assembly base of each blade and the axis of the drum body is gradually increased from a material inlet end to a material outlet end of the drum body; a first end of each blade is not lower than a second end of each blade; the first end of each blade is close to the material outlet end of the drum body; and the second end of each blade is close to the material inlet end of the drum body. By adopting the blade arrangement mode and structure provided by the embodiment of the invention, a material passing amount in the drum body is not affected, and lifting height of materials and uniformity of scattering of the materials can also be improved; and retention time of the materials in the drum body is prolonged, and the contact area between the materials and hot smoke is increased, so that heat exchange efficiency is enhanced.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a blade structure, a drying drum and drying equipment. Background technique [0002] The drying drum is the core component of traditional drying equipment. It uses the convective heat exchange process between materials and hot flue gas in the drum to achieve material drying and heating. It is widely used in building materials, metallurgical ores and other fields. [0003] Such as figure 1 As shown, the drying drum generally includes a combustion zone 1', a drying zone 2' and a material guide zone 3'. After the material enters the drying drum from the conveying equipment 5', it quickly enters the drying area 2' through the action of the spiral blades in the material guide area 3', and after the lift of the lifting blades 21' evenly distributed on the inner wall of the drying area 2' , falls and forms material curtain 22'. During the falling process, the material has convect...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned drying drum has a certain inclination angle, which will speed up the moving speed of the material to the combustion zone 1' and increase the output of the drying drum, but at the same time the residence time of the material in the drying zone 2' will be reduced, therefore, it will affect the flue gas and Material heat exchange efficiency

However, if the speed of material flow to the combustion zone 1' is slowed down by reducing the inclination angle of the drying drum, the output of the drying drum will be reduced.

Furthermore, the materials raised by the lifting blades 21' of the existing drying zone 2' are too little, so that the materials are not heated sufficiently

[0006] To sum up, when the rotating speed of the drying drum and the amount of material meet the production conditions, the speed at which the material moves to the combustion zone 1', the time it stays in the drying zone 2', and the material curtain formed by the blade lifting the material will affect the smoke. Heat exchange efficiency between gas and material

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