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Combustion-supporting additive for hot briquetting of lignite

A hot-press forming and additive technology, applied in the fuel, solid fuel, petroleum industry and other directions, can solve the problems of incomplete combustion, low activity, easy to be affected by moisture, etc., to improve activity, good thermal stability, and improve burnout rate. Effect

Inactive Publication Date: 2013-03-20
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

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Effect test

preparation example Construction

[0019] The preparation method of the combustion-supporting additive for lignite hot pressing according to the present invention comprises the following steps:

[0020] a. The magnesium bars of the formula amount are pulverized in a pulverizer to obtain magnesium particles of 1-2 mm, for subsequent use;

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

[0022] c. Pulverize the pine wood powder of the formula to a diameter of 1mm, for use;

[0023] The additive is added according to the ratio of additive: lignite = 1:100, and the specific steps are as follows: 1) First, pulverize the coal to a particle size of less than 3 mm, and uniformly disperse the magnesium particles in the formula amount into the lignite,

[0024] 2) Dissolve sodium lauryl sulfate, sodium bicarbonate, binder, strong oxidant, sulfur fixative and industrial salt in formula amo...

Embodiment 1

[0029] Sodium dodecyl sulfate: 2%, sodium bicarbonate: 2%, binder: 20%, magnesium particles: 10%, pine wood flour: 50%, strong oxidant: 20%, sulfur fixer: 3%, industrial salt: 3%. They are added to the lignite in the weight ratio of additive: lignite = 1:100 to obtain briquette with a strength of 70 kg / ball. Compared with the briquette without additives, the flame temperature is increased by about 50 °C. , the burned briquette has no black heart, 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

[0031] Take sodium lauryl sulfate: 1%, sodium bicarbonate: 3%, binder: 10%, magnesium particles: 5%, pine wood flour: 60%, strong oxidant: 5%, sulfur fixer: 8%, industrial salt: 8%. They are added to the lignite at a weight ratio of additive: lignite = 1:100 to obtain briquette with a strength of 72 kg / ball. Compared with the briquette without additives, the flame temperature is increased by about 40 °C. , the burned briquette has no black heart, 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 present application relates to the field of coal-fired additions, 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 call for energy saving and low carbon advocated by the state. The whole society has paid great attention to the full combustion of coal and the reduction of harmful gas emissions 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 combustion support and additives are important technologies to improve the utilization rate of coal and reduce pollution. [0003] Various types of desulfurizers in the prior art or additives with both combustion-supporting and decoking functions are mainly composed of calcium oxide CaO, sodium carbonate Na 2 CO 3 , and some strong alkal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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