Device and method for grading lignite by granularity and drying lignite

A technology of particle size classification and drying method, applied in drying gas arrangement, drying, dryer and other directions, can solve the problems of high investment cost, high requirements for manufacturing process and operation control, achieve low equipment cost, easy to optimize configuration, The effect of high energy efficiency of the device

Inactive Publication Date: 2013-02-13
NANJING UNIV OF SCI & TECH
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tube bundle dryer has high requirements for manufacturing process and operation control, and there is still a considerable gap in this aspect in China, and the investment cost of the entire drying system is very expensive, far exceeding the current economic bearing capacity of our country.

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
  • Device and method for grading lignite by granularity and drying lignite
  • Device and method for grading lignite by granularity and drying lignite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033]The raw coal inlet 1 of this device is connected with the vibrating screen machine 2, and the vibrating screen machine 2 is connected with the super large particle conveying pipe 3, the gangue separator 4, the gangue particle removing pipe 6, the crusher 7 and the crushed coal conveying pipe 8, and the gangue outlet is 5 is connected with the gangue sorting machine 4; the two ends of the fine particle pipe 9 are respectively connected with the vibrating screen machine 2 and the fine particle bin 13, and the coarse particle branch pipe 11 is led out from the coarse particle pipe 10, and the fine particle feed pipe 14 is merged with the regulating valve 12 Insert the paddle drier 15, the coarse particle pipe 10 is connected to the coarse particle bin 24; the two ends of the fine particle feed pipe 14 are respectively connected with the fine particle bin 13 and the paddle drier 15, the paddle drier steam pipe 16, the paddle drier The condensate pipe 17 of the leaf dryer and ...

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

The invention discloses a device and a method for grading lignite by granularity and drying the lignite. The device comprises a grading subsystem, a fine grain drying subsystem, a coarse grain drying subsystem and an exhausting subsystem, wherein the grading subsystem is connected with the fine grain subsystem, and the grading subsystem is connected with the coarse grain drying subsystem; and the exhausting subsystem is connected with the fine grain drying subsystem, and the exhausting subsystem is connected with the coarse grain drying subsystem. According to the device and the method, the original lignite is graded by granularity first and then dried separately, so the quality of the product is improved; the configuration of the device is easy to optimize, the cost of the device is low, and the drying efficiency of the device is high; waste gas afterheat can be recycled in the drying device, the device has high energy efficiency, a small amount of exhaust gas is required to be treated, and the treatment cost is low; and the drying device is very safe, and the installation, operation and maintenance of the device are very convenient, and the cost of the device is low.

Description

technical field [0001] The invention relates to a low-rank coal upgrading device and method, in particular to a lignite drying device and method for grading high-moisture lignite according to particle size and then drying them separately. Background technique [0002] As a typical low-rank coal, lignite has a moisture content ranging from 15% to 70% (the moisture content of lignite in my country is generally between 30% and 40%). Too high moisture brings many problems to the utilization of lignite, such as: (1) high moisture leads to lower calorific value and system energy efficiency; (2) high moisture makes coal grindability worse, coal powder quality decreases, and hinders sorting (3) High moisture will adversely affect various chemical applications; (4) High moisture will greatly increase transportation volume and transportation costs, and it will also cause coal piles to freeze in cold winter or cold regions . [0003] Drying is the most effective way to reduce the moi...

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 Applications(China)
IPC IPC(8): C10L9/08F26B21/00
Inventor 张后雷刘心志朱曙光熊荣辉王文举
Owner NANJING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap