Unlock instant, AI-driven research and patent intelligence for your innovation.

Dry grading method of powdered coal and its equipment

A classification method and dry method technology, applied in chemical instruments and methods, solid separation, separating solids from solids with airflow, etc., can solve the problems of low classification accuracy, large air volume, large and complex equipment, etc.

Inactive Publication Date: 2006-07-19
CHINA UNIV OF MINING & TECH
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the dry grading equipment designed by using different principles has its own characteristics and can achieve certain effects, but there are some problems. For example, some grading machines have high grading efficiency and large processing capacity, but the equipment is huge and complicated. Inconvenient maintenance, excessive air volume and high energy consumption; although some classifiers are small in size and simple in structure, they have small processing capacity and low classification accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dry grading method of powdered coal and its equipment
  • Dry grading method of powdered coal and its equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0011] The dry coal classification method of the present invention adopts a closed circulation system composed of a vertical classification bin 2, a cyclone dust collector 7 and a centrifugal fan 4, so that a negative pressure is formed inside the equipment, and the granular material is discharged from the vertical classification bin. The material inlet of 2 is injected, and the granular material falls freely. The falling granular material passes through the impact and screening on the dispersion plate 13 in the vertical classification bin 2, so that the material is fully dispersed. While the material is dispersed, the material is dispersed by Centrifugal fan 4 blows and induces horizontally the dispersed materials to realize the classification of coarse-grained product a, medium-grained product b, and fine-grained product c of the material. The air-inducin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A dry classifying apparatus for powdered coal or other bulk particles is composed of a vertical classifying cabin with dispersing plates in it and the horizontal air inlet and air exhausting outlet before and after said dispersing plates, and a cyclone cleaner. Its classifying method includes such steps as gravitationally dropping material onto dispersing plates for dispersing and primary classifying, and continuously dropping down which acting it by transverse airflow for further classifying.

Description

1. Technical field [0001] The invention relates to a pulverized coal dry classification method and equipment, and is especially suitable for fine-grain classification of coal or bulk materials, and also suitable for fine-grain classification of iron ore, copper ore and other bulk materials. 2. Background technology [0002] There are two main types of classification for bulk materials: one is to use screening machinery to classify materials, such as various types of vibrating screens. This type of screening machine is easy to cause blockage of the screen holes for wet materials, which makes the classification efficiency of the screening machine The other is wind or hydraulic classification, hydraulic classification belongs to wet classification, and has certain limitations in application. In recent years, with the enhancement of people's environmental awareness, wind classification has gradually shown the characteristics of adapting to the times, and has developed a lot of c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B07B7/083B07B11/02B07B11/00B07B4/02
Inventor 杨建国王羽玲陈小国
Owner CHINA UNIV OF MINING & TECH