Pitch slurry and its preparation method

A technology for coal tar pitch and water slurry is applied in the field of preparing coal tar pitch water slurry, and achieves the effects of high combustion efficiency, good fluidity and low emission of pollutants

Inactive Publication Date: 2007-05-02
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on preparing coal pitch water slurry (Car Pitch-Water Slurry, abbreviated as CPWS) with coal pitch as raw material has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] Freeze the medium-temperature coal tar pitch fragments with a softening point of 85°C at -30°C for 24 hours, add 0.5% sodium dodecylsulfonate, crush them with a pulverizer, and sieve them with a 200-mesh standard unified sieve to obtain Coal tar pitch powder.

[0018] Add 0.5 g of sodium dodecyl sulfonate to 49.5 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.63MJ / Kg.

Embodiment approach 2

[0020] Freeze the medium-temperature coal tar pitch fragments with a softening point of 90°C at 15°C for 22 hours, add 1% sodium dodecylbenzenesulfonate, crush them with a pulverizer, and sieve them with a 240-mesh standard unified sieve to obtain Coal tar pitch powder.

[0021] Add 1 g of sodium dodecylbenzene sulfonate to 49 g of water and stir to dissolve, then add 50 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 19.67MJ / Kg.

Embodiment approach 3

[0023] Freeze the medium-temperature coal tar pitch fragments with a softening point of 95°C at 5°C for 20 hours, add 0.6% of JL-C01 quaternary ammonium salt surfactant, crush them with a pulverizer, and sieve with a 280-mesh standard unified sieve. Coal tar pitch powder is produced.

[0024] Add 2 g of sodium dodecyl naphthalene sulfonate to 38 g of water and stir to dissolve, then add 60 g of coal tar pitch powder under the action of high-speed shear force, and stir evenly to prepare coal tar pitch water slurry. The coal tar pitch water slurry is a fluid liquid fuel, which can be pumped at room temperature, and has a low calorific value of 24.57MJ / Kg.

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Abstract

This invention relates to coal tar pitch slurry and its preparation, and it belongs to waste residue disposal technology field and energy and environmental protection field. It mainly solves the problem of hard to burn directly of coal tar pitch. Its feature is that this coal tar pitch slurry is a fluid liquid fuel, and its components and their weight percentage is that coal tar pitch powder 50%-60%, water 38%-49.5%, dispersant 0.5%-2%. The preparation is that middle temperature coal tar pitch whose softening point is 85-95deg.C or high temperature coal tar pitch whose softening point is 100-110deg.C is freezed 20-28h with brittle temperature -30-15 deg.C, then shattered after adding surfactant, and then screening to get coal tar pitch powder with particle size 200-320 meshes, and then adding this coal tar pitch powder into water solution of dispersant, at last, coal tar pitch slurry fuel with good fluidity, good atomization performance, high combustion efficiency and low pollutants emission is produced by stirred homogeneously.

Description

technical field [0001] The invention discloses a method for preparing coal tar pitch water slurry, which belongs to the technical field of waste residue treatment and the fields of energy and environmental protection. Background technique [0002] Coal tar pitch is the residue after distillation of the volatile fraction in coal tar, mainly composed of polycyclic aromatic hydrocarbons and their derivatives and heterocyclic compounds, accounting for about 50%-60% of coal tar, except for the preparation of electrode pitch, In addition to anti-corrosion of building materials and road asphalt, it can also be used as fuel. However, when coal tar pitch is burned directly, due to its condensed aromatic ring structure and high viscosity, it is difficult to burn completely, resulting in a large amount of black smoke and causing environmental pollution. [0003] Pitch-water slurry (PWS for short) is a clean liquid alternative fuel being developed with the help of coal-water slurry tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
Inventor 常宏宏杨怀旺魏文珑姚润生王志忠
Owner TAIYUAN UNIV OF TECH
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