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Method for removing organic sulfur in coal

An organic sulfur removal technology, applied in the field of coal desulfurization, can solve the problems of difficult selection of safe and environmentally friendly solvents, vague mechanism research, expensive organic solvents, etc., and achieve remarkable desulfurization effects, multiple economic benefits, and simple selection.

Inactive Publication Date: 2020-02-25
SHANXI COKING COAL GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, domestic and foreign research mainly has problems such as difficult selection of safe and environmentally friendly solvents, vague mechanism research, and expensive organic solvents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: a method for removing organic sulfur in coal, comprising the following steps:

[0016] Coal sample pretreatment: select the pulverized coal sample with a particle size of 5mm and put it into the steam explosion device and inject CO 2 Gas is used as the reaction medium, the temperature is set at 350°C, and the pressure is increased to 3MPa to allow the coal sample to undergo a steam explosion reaction, specifically for 1 hour, so that the internal and external pressure of the coal particles is balanced and the pressure is released instantaneously to generate steam explosion;

[0017] Coal sample into the tank: through the steps The pretreated coal sample is passed into the extraction kettle of the supercritical extraction desulfurization system, and the extraction kettle and its connecting pipelines are sealed;

[0018] Vacuum treatment: use vacuum treatment to vacuumize the extraction kettle, and fill the extraction kettle with CO through the compr...

Embodiment 2

[0021] Embodiment 2: a method for removing organic sulfur in coal, comprising the following steps:

[0022] Coal sample pretreatment: select the pulverized coal sample with a particle size of 3mm and put it into the steam explosion device and feed water vapor as the reaction medium, set the temperature at 100°C, pressurize to 4MPa, and let the coal sample undergo steam explosion reaction, specifically: Reaction for 0.1h, so that the internal and external pressure of the coal particles is balanced and the pressure is released instantaneously to cause steam explosion;

[0023] Coal sample into the tank: through the steps The pretreated coal sample is passed into the extraction kettle of the supercritical extraction desulfurization system, and the extraction kettle and its connecting pipelines are sealed;

[0024] Vacuum treatment: use vacuum treatment to vacuumize the extraction kettle, and fill the extraction kettle with CO through the compressor 2 The gas is mixed wit...

Embodiment 3

[0027] Embodiment 3: a method for removing organic sulfur in coal, comprising the following steps:

[0028] Coal sample pretreatment: Select the pulverized coal sample with a particle size of 6mm and put it into the steam explosion device and pass it into NH 3 As the reaction medium, set the temperature at 250°C and pressurize to 4.5MPa to allow the coal sample to undergo a steam explosion reaction, specifically for 2 hours, so that the internal and external pressure of the coal particles is balanced and the pressure is released instantaneously to generate steam explosion;

[0029] Coal sample into the tank: through the steps The pretreated coal sample is passed into the extraction kettle of the supercritical extraction desulfurization system, and the extraction kettle and its connecting pipelines are sealed;

[0030] Vacuum treatment: use vacuum treatment to vacuumize the extraction kettle, and fill the extraction kettle with CO through the compressor 2 Mix the gas w...

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Abstract

The invention belongs to the coal desulfurization field, relates to a desulfurization method combining chemical bond breakage rearrangement with organic reaction, and concretely relates to a method for removing organic sulfur in coal. The purpose of the invention is to solve the problems in the background technology. The method comprises the following steps: carrying out a steam explosion reactionon a coal sample, adding the coal sample subjected to steam explosion into an extraction kettle to reacte with a supercritical fluid system, vacuumizing a reactor before the reaction, forming a system with strong polarity, good reaction activity and high selectivity through supercritical fluid matching in order to remove the organic sulfur in the coal, collecting the reacted sample, and then detecting and analyzing the collected reacted sample. The method enhances the extraction mass transfer effect along with a micro-pyrolysis reaction, so macromolecular pyrolysis, micromolecular extractionand desulfurization effects are obvious; and the influences on the bonding performances of the coal before and after the reaction are little, and only sulfur-containing substances are effectively removed, so the safe and environmentally-friendly solvent is simple to select, the reaction mechanism is clear, and the cost of the organic solvent is reduced.

Description

technical field [0001] The invention belongs to the field of coal desulfurization, and relates to a desulfurization method combining chemical bond breaking rearrangement and organic reaction, in particular to a method for removing organic sulfur in coal. Background technique [0002] Sulfur is one of the main harmful elements in coal series. It will not only deteriorate the quality of subsequent industrial products, but also cause serious air pollution by the sulfur oxides and sulfides produced by its combustion. The sulfur in coal is divided into inorganic sulfur and organic sulfur. Inorganic sulfur can be removed by physical methods, while the chemical structure and composition of organic sulfur coal matrix are also very complex, so the thermal stability is also very different. The removal of organic sulfur in coal is achieved through the breaking of -C-S- bonds and the shedding of the overall functional group under high temperature conditions. The removal is relatively di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/00C10L9/02B01D11/02B01D11/00
CPCB01D11/0203B01D11/0207B01D2011/005C10L9/00C10L9/02C10L2290/28C10L2290/544
Inventor 彭垠樊建升刘晋芳赵刚强张世明桂夏辉
Owner SHANXI COKING COAL GROUP
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