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A treatment method for desulfurization and ash reduction of coal direct liquefaction residue

A technology of direct coal liquefaction and coal liquefaction residue, applied to the processing of tar pitch/petroleum pitch/natural pitch, processing of tar pitch/petroleum pitch/natural pitch, and processing of tar pitch/petroleum pitch/natural pitch by selective extraction and other directions, can solve environmental problems and other problems, and achieve the effect of reducing production costs and eliminating pollution

Active Publication Date: 2021-04-06
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sulfur content is about 1.5-2.0%, the ash content is 13-17%, and the sulfur content is higher than my country's steam coal combustion standard (<1%). If it is directly used, it will cause serious environmental problems.

Method used

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  • A treatment method for desulfurization and ash reduction of coal direct liquefaction residue
  • A treatment method for desulfurization and ash reduction of coal direct liquefaction residue
  • A treatment method for desulfurization and ash reduction of coal direct liquefaction residue

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with embodiment (accompanying drawing):

[0018] The sulfur in the coal liquefaction residue used in the present invention is 1.5 to 2.0%, and the ash content is 13 to 17%. The sulfur comes from the sulfur iron catalyst added when the coal is directly liquefied. The coal is closely embedded together, and it is difficult to remove sulfur by general methods such as flotation.

[0019] Such as figure 1 As shown, in order to effectively reduce the sulfur content and ash content of the coal liquefaction residue, the treatment method for the desulfurization and ash reduction of the coal direct liquefaction residue of the present invention comprises the following steps:

[0020] (1) Configure THPS solution: configure 100 mL of THPS (tetrahydroxymethylphosphorus sulfate) solution with a certain concentration, the pH value of the solution is 4.0, and the concentration is 15 mg / L to 60 mg / L;

[0021] THPS is a...

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Abstract

The invention relates to a treatment method for desulfurization and ash reduction of coal direct liquefaction residue, which comprises the steps of THPS solution, leaching test, solid-liquid separation, sulfate precipitation, etc. The sulfur content is reduced to 0.59%, which is a low-sulfur coal sample, which meets the combustion standard of industrial steam coal, and the ash content is reduced to 8.20%. The invention aims at reduction and harmlessness, can better reduce the sulfur content and ash content of the coal liquefaction residue, and realize the green recovery of the solid waste of the coal liquefaction residue.

Description

technical field [0001] The invention relates to the technical field of solid waste resource treatment, in particular to a treatment method for desulfurization and ash reduction of coal direct liquefaction residue. Background technique [0002] The residue obtained from Shenhua coal liquefaction is an important organic heavy carbon resource. Its typical composition is: heavy oil accounts for about 30%, asphaltenes and pre-asphaltenes account for about 25%, THF insolubles, inorganic minerals and Catalyst accounts for about 45%. However, the sulfur content is about 1.5-2.0%, and the ash content is 13-17%. The sulfur content is higher than my country's thermal coal combustion standard (<1%). If it is directly used, it will cause serious environmental problems. Sulfur comes from the sulfur iron catalyst added when coal is directly liquefied. The particle size of the sulfur iron catalyst is relatively fine. After liquefaction, the sulfur iron catalyst is closely embedded with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/08C10C3/02C10C3/00
CPCC10C3/002C10C3/023C10C3/08
Inventor 范桂侠曹亦俊田弼洲周国莉张晓慢蒲文轩张佳彬
Owner ZHENGZHOU UNIV