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Device and method for screening coal powder in grain level being lower than 0.5 mm

A screening device and pulverized coal technology, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems of insufficient screening, large errors in screening results, large human factors, etc., and achieve screening The method is simple and easy to operate, and the effect of avoiding accumulation phenomenon

Inactive Publication Date: 2013-10-16
YONGCHENG COAL & ELECTRICITY HLDG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, when using a hand-held sieve vibrating instrument for screening, the operator needs to rotate the sieve continuously, so there are disadvantages of low efficiency and large human factors; when relying on water flow for sieving, because the flow direction of the water is purely from top to bottom Under the vertical flow, the material is easy to accumulate, and the purpose of sufficient screening cannot be achieved, and the error of the screening result is large.

Method used

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  • Device and method for screening coal powder in grain level being lower than 0.5 mm
  • Device and method for screening coal powder in grain level being lower than 0.5 mm
  • Device and method for screening coal powder in grain level being lower than 0.5 mm

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Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 As shown, a screening device for pulverized coal with a particle size below 0.5 mm, the screening device includes a barrel-shaped container surrounded by a bottom surface 4 and a side wall 9, and the barrel-shaped container is sequentially set with two Layer screen drum, the innermost screen drum is the first screen drum 5, the second screen drum 6 is set outside the first screen drum 5, the screen hole size of the first screen drum 5 is 0.5mm, the second screen drum 6 The size of the sieve hole is 0.25mm, wherein the inner cavity of the first sieve drum 5 is the feeding cavity, and the side wall 9 of the barrel-shaped container is provided with a water outlet 3 .

Embodiment 2

[0022] Adopt the screening method of the screening device of embodiment 1, may further comprise the steps:

[0023] (1) Put the coal powder to be screened into the inner cavity of the first screen cylinder 5 of the screening device;

[0024] (2) Inject water into the inner cavity of the first sieve cylinder 5, and the pulverized coal to be screened is dispersed and moved around under the agitation of the water flow, passing through the first sieve cylinder 5 and the second sieve cylinder 6 in turn, and the coal powder of different particle sizes The pulverized coal stays or passes through the sieve drum, and finally achieves the purpose of grading and screening.

Embodiment 3

[0026] as attached figure 2 ~ attached Figure 5 As shown, a screening device for pulverized coal with a particle size below 0.5 mm, the screening device includes a barrel-shaped container surrounded by a bottom surface 4 and a side wall 9, inside the barrel-shaped container there are four sets of The innermost layer is the first sieve cylinder 5, the second sieve cylinder 6, the third sieve cylinder 7 and the fourth sieve cylinder 8 from inside to outside, the first sieve cylinder 5, the second sieve cylinder 6, the second sieve cylinder The mesh sizes of the three sieve cylinders 7 and the fourth sieve cylinder 8 are respectively 0.5mm, 0.25mm, 0.125mm, and 0.045mm, wherein the inner cavity of the first sieve cylinder is the feeding cavity, and the side wall 9 of the barrel-shaped container is provided with Water outlet 3, the water outlet direction of water outlet 3 is the tangential direction of the side wall 9 of the barrel-shaped container, the upper part of the barrel...

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Abstract

The invention discloses a device for screening coal powder in a grain level being lower than 0.5 mm and further discloses a method for screening the coal powder less in a grain level being lower than 0.5 mm simultaneously. The screening device comprises a cylindrical container defined by a bottom surface and a lateral wall. At least two screening cylinders are sleeved in the cylindrical container from the center to the outside in sequence, wherein the inner cavity of the innermost screening cylinder is a feeding cavity; a water outlet is arranged on the lateral wall of the cylindrical container; the sizes of screening sizes become smaller and smaller in a sequence of the screening cylinders which are arranged from the center to the outside, and the size of the screening holes of the innermost screening cylinder is maximum. The screening device disclosed by the invention has the advantages of simple structure and easiness for operation. The screening method using the screening device disclosed by the invention is simple and feasible and has the advantages of sufficient screening and good screening effect, so that the screening method is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the fine screening technical field of coal powder, and in particular relates to a screening device and a screening method for coal powder below 0.5mm grain size. Background technique [0002] At present, the known sieving methods for pulverized coal below 0.5mm particle size (including 0.5mm particle size) generally use wet sieving. There are two common sieving operation methods, one is to use a hand-held The vibrating sieve instrument clamps the sieve wall and places it in water for vibrating sieving. The other is to arrange a group of sieves from top to bottom in order of mesh number from small to large, and then rely on water flow to wash from top to bottom to sieve. point. Among them, when using a hand-held sieve vibrating instrument for screening, the operator needs to rotate the sieve continuously, so there are disadvantages of low efficiency and large human factors; when relying on water flow for sieving, because the fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B5/56
Inventor 张铁军陈旭升何茂林陈保安马志杰
Owner YONGCHENG COAL & ELECTRICITY HLDG GRP
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