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Bulk material multi-size screening-grading apparatus

A screening device and technology for bulk materials, applied in the direction of sieve, solid separation, grille, etc., can solve the problems of poor sieving, easy blocking of sieve, etc., so as to improve the performance of sieving, reduce investment, and eliminate the problem of blocking screen. Effect

Inactive Publication Date: 2007-02-07
马奎山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-stage particle size screening device for bulk materials, which is used to overcome the shortcomings of the existing trommel screen with two layers of screen cylinders in the process of screening coal, which is not smooth and easy to block the screen.

Method used

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  • Bulk material multi-size screening-grading apparatus
  • Bulk material multi-size screening-grading apparatus
  • Bulk material multi-size screening-grading apparatus

Examples

Experimental program
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Embodiment Construction

[0008] Assemble the machine base 1 with steel plates, separate the material inlet and outlet 4 at the front end of the machine base, and separate the different particle size discharge ports including the fine material outlet 5a, the medium material outlet 5b, and the bulk outlet 5c at the bottom of the machine base. Screen drum support wheels 6 are installed at the front end of the machine base. Screen drum rotating shaft 7 is installed on the support at the front and rear ends of the machine base. Surround the cylindrical sieve drum 2 with metal plates. The diameter of the inner cylinder is 1400mm, the diameter of the outer cylinder is 1800mm, and the length of the cylinder is 2000-3000mm. The front section of the inner cylinder is covered with material penetration holes capable of passing through crushable coal particle size. The aperture is generally selected between 30-200mm. There is a large hole at the back section of the inner cylinder which is twice the correspondi...

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Abstract

The bulk multistage grain size screening equipment is characterized by that it has an internal riddle drum and external riddle drum structure developed on the basis of cylindrical screen, and the pore size of the intenal riddle drum is used for screening out bulk with larger granules, and the pore size of the external riddle drum is smaller, and is used for screening out fine bulk, at the same time in internal riddle drum and between internal riddle drum and external riddle drum the pendulum bob and flyball are set, they can be matched with riddle drum to form extrusion to obtain good screening effect. The adoption of said invention not only can remove large bolk and impurity, but also can obtain two bulk materials with different grain sizes.

Description

Technical field: [0001] The invention belongs to the technical field of screening equipment in operation and transportation. Background technique: [0002] For bulk materials such as coal and ore, in order to meet the particle size during use and remove large impurities, different forms of screening devices have appeared. Such as vibrating screen, trommel screen, roller screen, etc. However, the above-mentioned screening device can only separate one particle size used from the bulk material. Sometimes it is necessary to screen two or more particle sizes, such as coal-fired power plants, which require the coal to be divided into fine "non-crushed coal" and directly fed into the boiler, and "crushable coal" directly into the coal crusher. This requires two screening devices with different apertures to run in parallel, which will inevitably result in waste of space, equipment and man-hours. Previously, there has been a trommel screen installed on the same rotating shaft with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07B1/52B07B1/24
Inventor 马奎山
Owner 马奎山