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Combustion-supporting additive for hot briquetting of lignite

A technology of hot pressing and additives, which is applied in fuel, solid fuel, petroleum industry, etc. It can solve the problems of incomplete combustion, insufficient activity, easy to be affected by moisture, etc., and achieve the effect of improving activity and good thermal stability

Inactive Publication Date: 2011-06-08
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 the same time, the use of these processes is complicated, and the cost increases. In the process of use, the activity is not high enough, the combustion is not complete, and the "black heart phenomenon" appears.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of the combustion-supporting additive used for lignite hot-press molding of the present invention comprises the following steps:

[0020] A, the magnesium bar of formula quantity is pulverized in pulverizer to obtain the magnesium particle of 1-2mm, for subsequent use;

[0021] b. Pulverize the sodium lauryl sulfate, sodium bicarbonate, binding agent, strong oxidizing agent, sulfur-fixing agent, and industrial salt of the formula, mix well, and set aside;

[0022] c, pulverize the pine wood powder of formula quantity to diameter 1mm, set aside;

[0023] Said additive is added by additive: lignite=1: 100 ratio, and concrete steps are as follows: 1) first, coal is pulverized to particle diameter below 3mm, and the magnesium particle of formula quantity is evenly dispersed in lignite,

[0024] 2) With water accounting for 5% of lignite weight, sodium lauryl sulfate of formula, sodium bicarbonate, binding agent, strong oxidizing agent, sulfur-fixing ...

Embodiment 1

[0028] Get sodium lauryl sulfate by weight: 2%, sodium bicarbonate: 2%, binder: 20%, magnesium particles: 10%, pine wood powder: 50%, strong oxidizing agent: 20%, sulfur-fixing agent: 3%, industrial salt: 3%. They are added to lignite according to the weight ratio of additive: lignite = 1:100 to obtain briquettes with a strength of 70 kg / ball. According to the combustion experiment, compared with the briquettes without additives, the flame temperature is increased by about 50°C , There is no black heart in the briquette after burning, the burnout time is shortened by 15 minutes, the emission of sulfur dioxide is reduced by 80%, and the emission of carbon monoxide is reduced by 90%.

Embodiment 2

[0030] Sodium lauryl sulfate by weight: 1%, sodium bicarbonate: 3%, binder: 10%, magnesium particles: 5%, pine wood powder: 60%, strong oxidizing agent: 5%, sulfur-fixing agent: 8%, industrial salt: 8%. Add them into lignite according to the weight ratio of additive: lignite = 1:100 to obtain briquettes with a strength of 72 kg / ball. According to the combustion experiment, compared with the briquettes without additives, the flame temperature increases by about 40°C , the burnt briquette has no black core, the burnout 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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PUM

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Abstract

The invention relates to a combustion-supporting additive for the hot briquetting of lignite. The additive comprises the following components in percentage by weight: 1-2% of sodium dodecylsulfate, 2-3% of sodium bicarbonate, 10-20% of bonding agent, 5-10% of magnesium particles, 50-60% of pine powder, 5-20% of strong oxidant, 3-8% of sulfur-fixing agent and 3-10% of industrial salt. By utilizingthe additive disclosed by the invention, the burn-out rate of the lignite can be increased, the discharge of sulfur dioxide and carbon monoxide is reduced, and the effect of saving energy is achieved.

Description

technical field [0001] The application relates to the field of coal-fired additives, in particular to a combustion-supporting additive for hot-pressing lignite. Background technique [0002] With the continuous deterioration of the atmospheric environment, and in response to the country's call for energy conservation and low carbon. The entire society has paid great attention to the full combustion of coal and the reduction of emissions of harmful gases such as sulfur dioxide. The comprehensive application of environmental protection technology is one of the important ways to solve this problem. At present, the commonly used coal-fired combustion-supporting additives are important technologies to improve the utilization rate of coal-fired and reduce pollution. [0003] All kinds of desulfurizers in the prior art or additives with combustion-supporting and coke-clearing functions are mainly composed of calcium oxide CaO, sodium carbonate Na 2 CO 3 , and certain strong alka...

Claims

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Application Information

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IPC IPC(8): C10L9/10C10L5/04C10L5/10
Inventor 曾美霞
Owner 南通欧通置业有限公司
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