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Method for preparing coal water slurry by using direct coal liquefaction residues, coal water slurry and gasification method thereof

A technology of direct coal liquefaction and coal water slurry, which is applied in the gasification of granular/powder fuel, liquid carbon-containing fuel, petroleum industry, etc., can solve the problem of insufficient utilization of coal direct liquefaction residue, and achieve the effect of improving the utilization rate

Active Publication Date: 2014-04-02
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to provide a method for preparing coal water slurry from coal direct liquefaction residue, coal water slurry and its gasification method, so as to solve the problem of insufficient utilization of coal direct liquefaction residue in the prior art

Method used

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  • Method for preparing coal water slurry by using direct coal liquefaction residues, coal water slurry and gasification method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 200kg of coal direct liquefaction residue and 2100kg of anthracene oil (distillation range 220-405°C) into the stirred tank, stir at a speed of 45r / min, fill it with H 2 to 1.5MPa, after heating up to 60°C, extract with constant temperature stirring for 70min. The extraction mixture was subjected to hot vacuum filtration, the filtration temperature was 45° C., the filtration pressure was 0.015 kPa, and the pore size of the filter core was 30 μm. After filtration, 141.3kg of solid filter residue and 2158.1kg of filtrate were collected.

[0036] The filtrate was sent to a vacuum distillation tower for vacuum distillation, and the extraction solvent was recovered from the top and side of the tower for recycling, and 103.7kg of extracts (heavy oil, bituminous substances) with an ash content of 0.2wt% were collected at the bottom of the tower.

[0037] Send the solid filter residue to the drying unit for drying to obtain 45.2kg of extraction solvent (recyclable) and 95....

Embodiment 2

[0041] Add 200kg of coal direct liquefaction residue and 200kg of washing oil (distillation range 220-405°C) into the stirred tank, stir at a speed of 300r / min, fill it with N 2 to 1.0MPa, after heating up to 280°C, extract with constant temperature stirring for 60min. The extraction mixture was subjected to thermal vacuum filtration, the filtration temperature was 250° C., the filtration pressure was 1.0 MPa, and the pore size of the filter core was 50 μm. After filtration, 135.1 kg of solid filter residue and 263.8 kg of filtrate were collected.

[0042] The filtrate was sent to a vacuum distillation tower for vacuum distillation, and the extraction solvent was recovered from the top and side of the tower for recycling, and 99.8kg of extracts (heavy oil and bituminous substances) with an ash content of 0.5wt% were collected at the bottom of the tower.

[0043] Send the solid filter residue to the drying unit for drying to obtain 32.1kg of extraction solvent (recyclable) and...

Embodiment 3

[0047] Add 200kg coal direct liquefaction residue and 2000kg anthracene oil (distillation range 220-405°C) into the stirred tank, stir at a speed of 50r / min, fill it with N 2 to 0.1MPa, after heating up to 80°C, extract with constant temperature stirring for 5min. The extraction mixture was subjected to thermal vacuum filtration, the filtration temperature was 50° C., the filtration pressure was 0.2 MPa, and the pore size of the filter core was 10 μm. After filtration, 139.5kg of solid residue and 2058.7kg of filtrate were collected.

[0048] The filtrate was sent to a vacuum distillation tower for vacuum distillation, and the extraction solvent was recovered from the top and side of the tower for recycling, and 104.7kg of extract (heavy oil, asphalt-like substances) with an ash content of 0.1wt% was collected at the bottom of the tower.

[0049] Send the solid filter residue to the drying unit for drying to obtain 44.3kg of extraction solvent (recyclable) and 93.9kg of raffi...

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Abstract

The invention discloses a method for preparing coal water slurry by using direct coal liquefaction residues, the coal water slurry and a gasification method thereof. The method for preparing the coal water slurry by using direct coal liquefaction residues comprises the steps: S1, extracting the direct coal liquefaction residues, carrying out solid-liquid separation, and then, drying to obtain extracts; and S2, crushing and grinding the extracts, then, adding water and a selectable surfactant into the extracts, and stirring to obtain the coal water slurry. After the direct coal liquefaction residues are extracted, heavy oil and asphalt substances in the direct coal liquefaction residues can be separated from unconverted coal and ash which are both called as the extracts. After the extracts are crushed and ground and are filled with the water and the selectable surfactant, the coal water slurry can be formed. The coal water slurry can serve as a common fuel and can be particularly applied to gasification production. Therefore, the extracts of the direct coal liquefaction residues are effectively utilized, and furthermore, the utilization ratio and additional value of the direct coal liquefaction residues are increased.

Description

technical field [0001] The invention relates to the field of recovery and utilization of coal direct liquefaction residue, in particular to a method for preparing coal water slurry from coal direct liquefaction residue, the coal water slurry and its gasification method. Background technique [0002] With the rapid development of the national economy, my country's consumption of petroleum products continues to grow, greatly exceeding the growth rate of crude oil production in the same period. This has led to an increase in my country's oil imports year by year, even exceeding its own production. my country is a country rich in coal and poor in oil. Making full use of abundant coal resources and developing advanced clean coal technologies such as direct coal liquefaction is one of the important ways to reduce excessive dependence on foreign crude oil, alleviate the shortage of my country's oil resources and the tight supply and demand of petroleum products. At the same time, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10J3/46
Inventor 李克健杨葛灵章序文程时富万豪杰
Owner CHNA ENERGY INVESTMENT CORP LTD