Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Forming and quality improving method for brown coal

A technology for lignite and briquette, which is applied in the fields of lignite molding and quality improvement and coal deep processing of lignite molding and quality improvement, can solve the problems of immature technology, serious environmental pollution, large project investment, etc., and achieves prolonged spontaneous combustion and ignition period, simple process, The effect of lower production costs

Inactive Publication Date: 2013-06-05
苗若鹏 +1
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems of the above-mentioned lignite upgrading technology are: immature technology, large project investment, serious environmental pollution, and large water consumption

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
  • Forming and quality improving method for brown coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0013] In the embodiment, firstly, the lignite with a low calorific value of 13.4 MJ / kg, a total moisture of 44.7%, an ash content of 8.44%, and a volatile content of 30.03% tested by a third-party measurement and inspection department is pulverized to below 6 mm, and its moisture content is adjusted to 45%, and then carry out pressure forming, the described forming process, add adhesive after lignite pulverization, mix and stir evenly, carry out pressure forming again.

[0014] The molded coal is sent to the mesh belt dryer for drying. The drying heat source of the mesh belt dryer is the furnace flue gas. The mesh belt dryer is divided into two groups of front and rear. The type dryer is a high-temperature section, and the rear mesh belt dryer is a low-temperature section. The front and rear sections are dried at different temperatures. The dry...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a forming and quality improving method for brown coal and belongs to the technical field of brown coal forming and quality improving in coal deep processing. According to the technical scheme, the method comprises the following steps of: first, smashing brown coal to 6mm below, and adjusting the weight percentage of moisture to 20-45%; then, performing pressing forming, drying formed coal in a drier, wherein the drier is divided into front and rear sections; and controlling the drying temperature of the front section of the drier to be 180-240 DEG C and controlling the drying temperature of the rear section of the drier to be 100-140 DEG C. The calorific value of brown coal dried and improved in quality can be improved by 30-70%, so that the transport cost is lowered, dust pollution in transport and use of coal is reduced, and the spontaneous combustion firing period of brown coal in storage and transport process is extremely prolonged. The process is simple and the ton production cost is greatly decreased. Gases discharged in the drying process are mainly hot air containing steam and are free of organic matters or other harmful gases generated by thermal cracking or thermal decomposition of coal, so that the environmental pollution is avoided.

Description

technical field [0001] The invention relates to a lignite forming and upgrading method, which belongs to the technical field of coal deep processing lignite forming and upgrading. Background technique [0002] Lignite is a coal with a lower degree of coalification. The degree of coalification is between peat and bituminous coal. It has a high water content and is easy to weather in the air; it contains a certain amount of primary humic acid, with low carbon content, high oxygen content, and hydrogen content. Large changes: volatile content is generally 45% to 55%. Due to high moisture content, low calorific value, easy weathering and spontaneous combustion of lignite, the transportation cost per unit of energy is high, which is not conducive to long-distance transportation and storage. The thermal efficiency of direct combustion of lignite is low, and the emission of greenhouse gases is also large, making it difficult to develop and utilize on a large scale. In addition, t...

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): C10L5/06
Inventor 苗若鹏戴吾昕
Owner 苗若鹏
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com