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Method for preparing lignite type briquette

A technology for lignite and briquette, which is applied in the field of preparation of lignite briquette, can solve the problems of discount in efficacy, high utilization cost, large amount of consumption, etc., and achieves the effect of improving activity and good thermal stability.

Inactive Publication Date: 2012-12-26
南通欧通置业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are that the dosage is relatively large, and the second is that it is very easy to be damp during the preparation and use. Once damp, its efficacy will be greatly reduced.
At present, oil sands are mainly used to refine heavy oil and bitumen, but the utilization cost is high

Method used

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Examples

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Effect test

preparation example Construction

[0023] The preparation method for lignite briquette of the present invention includes the following steps:

[0024] a. Crush the formulated amount of lignite, oil sand and pine wood powder to a particle size of less than 3mm, and then evenly disperse the magnesium particles in the additive into the lignite,

[0025] b. Dissolve sodium lauryl sulfate, sodium bicarbonate, humic acid, strong oxidizer, sulfur-fixing agent and sodium chloride at a ratio of water: remaining additive = 1.8:1 by weight, and spray them to the product obtained in step a. On brown coal,

[0026] c. Mix the lignite and oil sand powder obtained in step b heterogeneously with pine wood powder, and form it on a hot press molding machine at 120°C to obtain a sandwich briquette

Embodiment 1

[0029] Take 50% of lignite, 28% of oil sand, 20% of pine wood powder, and 2% of additives by weight. The briquette is obtained by hot pressing. The strength of the briquette is 74 kg / ball. Compared with the additive-added briquette, the flame temperature is increased by about 50°C, the burned briquette has no black core, the burnout time is shortened by 15 minutes, the sulfur dioxide emissions are reduced by 80%, and the carbon monoxide emissions are reduced by 90%.

Embodiment 2

[0031] Take 55% of lignite, 30% of oil sand, 13% of pine wood powder, and 2% of additives according to the weight ratio, hot press molding to obtain briquette. The strength of briquette is 76 kg / ball. Compared with the briquette with additives, the flame temperature is increased by about 40°C, the burned briquette has no black core, the burn-out time is shortened by 10 minutes, the emission of sulfur dioxide is reduced by 85%, and the emission of carbon monoxide is reduced by 92%.

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Abstract

The invention relates to a method for preparing lignite type briquette. The briquette comprises the following raw materials in percentage by weight: 50-60% of lignite, 25-30% of oil sand, 10-20% of pine powder and 2% of additive. The additive consists of 12wt% of sodium lauryl sulfate, 15wt% of sodium bicarbonate, 15wt% of humic acid, 10wt% of magnesium particles, 20wt% of strong oxidizer, 18wt% of sulfur fixation agent and 10wt% of sodium chloride. The briquette improves the burn-off rate of the lignite, sufficiently utilizes the oil sand resources, reduces the emission quantity of sulphur dioxide and carbon monoxide and achieves the purposes of environment protection and energy saving.

Description

Technical field [0001] This application relates to the field of solid fuels, in particular to a preparation method for lignite briquette. Background technique [0002] As the atmospheric environment continues to deteriorate, and in response to the country’s call for energy conservation and low carbon. The whole society has paid great attention to the full combustion of coal and the reduction of harmful gases such as sulfur dioxide. The comprehensive application of environmental protection technology is one of the important ways to solve this problem. The currently widely used coal-fired combustion-supporting and additives are important technologies to increase the utilization rate of coal and reduce pollution. [0003] Lignite is a coal with large reserves in China. Due to its high volatile content, it is not suitable for coking. Direct combustion will also cause serious air pollution. Therefore, in the prior art, lignite is rarely used directly to make briquette as boiler fuel. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L5/04C10L5/08
Inventor 曾美霞陈娟
Owner 南通欧通置业有限公司
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