Method and equipment for upgrading, drying and forming lignite

A lignite and drying technology, applied in the petroleum industry, solid fuels, fuels, etc., can solve problems such as coal ash pollution, reduce dust, reduce coal ash content, and improve the working environment.

Inactive Publication Date: 2013-12-11
ZHENGZHOU CITY OF MINING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for lignite upgrading, drying and forming, which solves the problem of coal ash pollution in the process of lignite upgrading, drying and forming, and improves the strength of briquettes

Method used

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  • Method and equipment for upgrading, drying and forming lignite
  • Method and equipment for upgrading, drying and forming lignite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The method for upgrading and drying the lignite of the present embodiment comprises the following steps:

[0028] 1) Pulverize lignite into coal powder below 3mm;

[0029] 2) Add 0.5% sodium hydroxide with a mass of 0.5% of the pulverized coal mass to the pulverized coal obtained in step 1), stir and feed water vapor with a volume of 3% of the pulverized coal volume to make it fully react. The temperature of the steam is 100°C, pressure 0.6MPa, reaction time 40min;

[0030] 3) Dry the reacted lignite with hot air at 120°C for 30 minutes; then perform compression molding with a linear pressure of 10T, a molding humidity of 20%, and a molding temperature of 90°C to obtain the product.

[0031] The lignite upgrading and drying molding equipment for realizing the above method of the present embodiment, such as figure 1 As shown, it includes a crusher 2, a dryer 3 and a molding machine 4, the molding machine 4 is provided with an inlet for the dry material from the dry mat...

Embodiment 2

[0034] The method for upgrading and drying the lignite of the present embodiment comprises the following steps:

[0035] 1) Pulverize lignite into coal powder below 3mm;

[0036] 2) To the pulverized coal obtained in step 1), add sodium hydroxide with a mass of 3% of the pulverized coal mass, stir and feed water vapor with a volume of 4% of the pulverized coal volume to make it fully react. The temperature of the steam is 95°C, pressure 0.6MPa, reaction time 60 minutes, coal powder condensed into small spherical coal powder is the best;

[0037] 3) Dry the reacted lignite with hot air at 120°C for 30 minutes; then perform compression molding with a linear pressure of 10T, a molding humidity of 20%, and a molding temperature of 90°C to obtain the product.

[0038] The lignite upgrading and drying equipment for realizing the above method of the present embodiment differs from the equipment in Example 1 in that: figure 2 As shown, the product outlet of the molding machine 4 is...

Embodiment 3

[0041] The method for upgrading and drying the lignite of the present embodiment comprises the following steps:

[0042] 1) Pulverize lignite into coal powder below 3mm;

[0043] 2) Add sodium hydroxide whose mass is 1.5% of the mass of coal powder to the coal powder obtained in step 1), stir and feed 5% water vapor whose volume is the volume of coal powder to make it fully react, and the temperature of the steam is 97 ℃, the pressure is 0.6MPa, and the reaction time is 20min;

[0044] 3) Dry the reacted lignite with hot air at 120°C for 30 minutes; then perform compression molding with a linear pressure of 10T, a molding humidity of 20%, and a molding temperature of 90°C to obtain the product.

[0045] The lignite upgrading and drying molding equipment of this embodiment is the same as the lignite upgrading drying molding equipment used in Example 2.

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Abstract

The invention discloses a method and equipment for upgrading, drying and forming lignite. The method comprises the steps of 1) pulverizing the lignite into pulverized lignite, 2) adding sodium hydroxide to the pulverized lignite, stirring, filling in water vapor, allowing the lignite to react sufficiently, and 3) drying the lignite after the reaction, conducting pressure forming, and obtaining the lignite. According to the method for upgrading, drying and forming the lignite, raised dust in a drying process is reduced greatly, so that atmospheric pollution is reduced and a working environment is improved; the content of lignite ash in moisture volatilized by a drying machine is reduced, so that the moisture is recovered greatly; and the density and the strength of the formed lignite are increased and improved, so that a binder is not required to be added in a forming process, and requirements of transportation and production can be met conveniently. In addition, the equipment for upgrading, drying and forming the lignite achieves upgrading, drying and forming integrated continuous cleaning production of the lignite, and is suitable for large-scale industrial production of upgrading, drying and forming of the lignite.

Description

technical field [0001] The invention belongs to the technical field of lignite upgrading and drying, and in particular relates to a lignite upgrading and drying forming method and equipment. Background technique [0002] my country is a country dominated by coal as a primary energy resource. Coal can provide more than 65% of primary energy. Coal production ranks first in the world and increases year by year. my country's recoverable reserves of coal resources rank third in the world, accounting for about 11.5% of the world's total reserves. Among them, lignite reserves account for about 16% of the world's total lignite reserves, most of which are concentrated in North China. With the increasing demand for energy and the over-exploitation of bituminous coal and anthracite resources, the development and utilization of lignite in my country will become more and more important. Compared with bituminous coal and anthracite, lignite has the advantages of lower price and high rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/02C10L9/08
Inventor 郎新国
Owner ZHENGZHOU CITY OF MINING EQUIP
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