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Water-coal-slurry additive and preparation method thereof

An additive and coal-water slurry technology, which is applied in the field of coal-water slurry additive and its preparation, can solve the problems of high price and achieve the effects of excellent performance, simple production process and good static stability

Active Publication Date: 2009-10-07
ENN XINNENG BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main advantage of non-ionic dispersants is that the hydrophilic and lipophilic properties of molecules and the relative molecular mass are easy to adjust and control, and are not affected by water quality and soluble matter in coal, and do not need to add stabilizers, but they are expensive

Method used

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  • Water-coal-slurry additive and preparation method thereof
  • Water-coal-slurry additive and preparation method thereof
  • Water-coal-slurry additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Coal sample source: Inner Mongolia Coal 1#

[0027]

[0028] Note: The industrial analysis of coal shall be determined according to GB / T212-2001; the elemental analysis of coal shall be determined according to GB / T476-2001; the grindability index of coal shall be determined according to MT / T230-2005. The following examples 2-10 are similar.

[0029] Additive type: naphthalenesulfonic acid formaldehyde condensate sodium salt: sodium lignosulfonate: octylphenol polyoxyethylene ether (meth) acrylate = 1:8:1, the degree of polymerization of naphthalenesulfonic acid formaldehyde condensate sodium salt is 7. The degree of polymerization of alkylphenol polyoxyethylene ether acrylate is 100.

[0030] Additive dosage: the quality of the composite additive (fold solid) is 0.1% of the coal (dry basis) quality.

[0031] Slurry performance results: the concentration of coal water slurry is 67%, at 25°C, the shear rate is 28.38s -1 , the apparent viscosity is 920mPa.s, and it c...

Embodiment 2

[0033] Coal sample source: Inner Mongolia Coal 2#

[0034]

[0035] Additive type: naphthalenesulfonic acid formaldehyde condensate sodium salt: calcium lignosulfonate: nonylphenol polyoxyethylene ether (meth) acrylate=5:4:1, the degree of polymerization of naphthalenesulfonic acid formaldehyde condensate sodium salt is 7. The degree of polymerization of alkylphenol polyoxyethylene ether acrylate is 10.

[0036] Additive dosage: the quality of the composite additive (fold solid) is 0.1% of the coal (dry basis) quality.

[0037] Slurry performance results: the concentration of coal water slurry is 68%, at 25°C, the shear rate is 28.38s -1 , the apparent viscosity is 880mPa.s, and it can exist stably for 10 days.

Embodiment 3

[0039] Coal sample source: Inner Mongolia Coal 3#

[0040]

[0041] Additive type: naphthalenesulfonic acid formaldehyde condensate sodium salt: sodium lignosulfonate: [dodecylphenol polyoxyethylene ether (meth)acrylate and nonylphenol polyoxyethylene ether (meth)acrylate] = 8:1:1, the degree of polymerization of naphthalenesulfonic acid formaldehyde condensate sodium salt is 15, and the polymerization degree of alkylphenol polyoxyethylene ether acrylate is 40.

[0042] Additive dosage: the quality of the composite additive (fold solid) is 1% of the coal (dry basis) quality.

[0043] Slurry performance results: the concentration of coal water slurry is 63%, at 25°C, the shear rate is 28.38s -1 , the apparent viscosity is 1040mPa.s, and it can exist stably for 5 days.

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Abstract

The invention provides a water-coal-slurry additive and a preparation method thereof. The additive is compounded by anionic surfactant naphthalene sulfonic acid formaldehyde condensation product sodium salt, lignosulphonate and non-ionic surfactant alkylphenol polyethenoxy ether (methyl) acrylic ester according to mass ratio of 8:1:1 to 1:8:1. The invention uses the naphthalene sulfonic acid formaldehyde condensation product sodium salt, lignosulphonate and alkylphenol polyethenoxy ether (methyl) acrylic ester in the preparation technology of water-coal-slurry, and the additive has wide adaptability to coal, in particular to coal with low degree of metamorphism. When ternary compound additive reaches 0.1-1wt percent of the weight (dry basis) of the coal, the water-coal-slurry with the content of coal dust being 62-70wt percent can be prepared. The slurry has good fluidity, lower apparent viscosity and favorable steady state stability. The ternary compound additive is simple in production process, excellent in performance and wide in the range of applicable coal.

Description

technical field [0001] The invention relates to the field of coal water slurry, in particular to a coal water slurry additive and a preparation method thereof. Background technique [0002] my country is a coal-rich country, and its specific energy structure determines that coal will remain the dominant energy source in my country in the next few decades. However, my country's coal utilization technology is relatively backward, and the environmental protection facilities are not complete and perfect. Not only the utilization efficiency of coal is low, but also the waste of coal resources is serious, and a large amount of soot and SO 2 seriously polluted the atmosphere. With the growing call for environmental protection, the development of clean coal technology is an important way to improve China's energy efficiency and reduce environmental pollution. China has included the development of clean coal technology in the "21st Century Agenda of China", emphasizing the need to...

Claims

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Application Information

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IPC IPC(8): C10L1/32
Inventor 段妮丽王志彬孟令龙张彦洲刘雪飞常俊石
Owner ENN XINNENG BEIJING TECH
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