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A coal additive with grinding aid

A coal additive and functional technology, used in fuel additives, petroleum industry, fuel, etc., can solve problems such as instability, and achieve the effects of reducing lubrication, improving work efficiency, and reducing surface tension

Active Publication Date: 2017-04-26
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN10120311A discloses a coal grinding and combustion aid and its preparation method and application, which is produced by using various substances through complex processes, and is in an emulsified state and is extremely unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Dissolve 10 g of dodecyltrimethylammonium chloride, 25 g of sodium dodecylbenzenesulfonate, 10 g of ammonium citrate, 6 g of hexamethylenetetramine and 49 g of water to prepare an aqueous solution. Mix the self-preparation with coal block 1# evenly, dry it, use a sample preparation machine for sample preparation, and use a laser particle size analyzer to measure its particle size distribution. The number is Example 1.

Embodiment 2

[0013] Dissolve 15 g of dodecyltrimethylammonium chloride, 20 g of sodium dodecylbenzenesulfonate, 15 g of ammonium citrate, 8 g of hexamethylenetetramine and 42 g of water to prepare an aqueous solution. Mix it with coal block 2# evenly, dry it, use a sample preparation machine for sample preparation, and use a laser particle size analyzer to measure its particle size distribution. The number is Example 2.

Embodiment 3

[0015] Dissolve 17 g of dodecyltrimethylammonium chloride, 28 g of sodium dodecylbenzenesulfonate, 11 g of ammonium citrate, 5 g of hexamethylenetetramine and 39 g of water to prepare an aqueous solution. Mix it with coal 3# evenly, dry it, use a sample preparation machine for sample preparation, and use a laser particle size analyzer to measure its particle size distribution. The number is Example 3.

[0016] Laser particle size analysis evaluation

[0017] Evaluation process: The prepared coal additives are diluted at a ratio of 100 times, and then fully mixed according to one thousandth of the mass of the coal block, dried, and sampled by a sample preparation machine and then analyzed by a laser particle size analyzer.

[0018] Table 1 The coal quality analysis report of the coal block is shown below.

[0019] coal type Ash, % Volatile matter, % Moisture, % Calorific value, cal / g coal block 1# 17.83 11.93 1.21 6213 coal 2# 16.82 21.80 2.0...

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PUM

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Abstract

The invention discloses a coal additive with grinding aiding effect. The coal additive is mainly applied in the preparation process of coal powder. The coal additive comprises the following components by mass: 10 to 20% of dodecyl trimethyl ammonium chloride, 20 to 30% of sodium dodecyl benzene sulfonate, 10 to 20% of ammonium citrate and 5 to 10% of hexamethylene tetramine, with the balance being water. The coal additive provided by the invention is added before coal blocks enter a coal grinder; and after the coal additive is added, the average particle size of the coal powder can be significantly reduced, and grinding efficiency of the coal grinder is improved.

Description

technical field [0001] The present invention relates to the field of coal additives, in particular to a coal additive which plays a role in assisting coal grinding. Background technique [0002] Coal pulverized coal is a common and readily available high calorific value fuel. With the development, promotion and mature application of industrial pulverized coal boiler technology in recent years, its supporting pulverized coal fuel processing and distribution center is gradually emerging as a new type of pulverized coal preparation system. Coal mill is the core equipment in the pulverized coal preparation system, and its main function is to grind coal into pulverized coal. Coal mill is the core equipment in the pulverized coal preparation system, and its main function is to grind coal into pulverized coal. Various coal mills grind coal into pulverized coal mainly by means of crushing, crushing and grinding. Each coal mill often has the above two or three functions at the same...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L10/00
Inventor 钟读乐曲晓龙孙彦民于海斌张燕隋芝宇
Owner CNOOC TIANJIN CHEM RES & DESIGN INST