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A kind of recovery method of coal mine ionic liquid inhibitor

A technology of ionic liquid and recovery method, applied in solid fuel, petroleum industry, fuel and other directions, can solve the problems of loss, damage, high cost of ionic liquid, and achieve the effect of easy operation and high recovery rate

Inactive Publication Date: 2019-09-27
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the accumulated ionic liquid inhibitor can destroy other substances in the mine, causing secondary losses
And the cost of ionic liquid is high, if it can be recycled, it will greatly reduce the cost of coal mines and contribute to the national economy

Method used

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  • A kind of recovery method of coal mine ionic liquid inhibitor
  • A kind of recovery method of coal mine ionic liquid inhibitor

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Experimental program
Comparison scheme
Effect test

Embodiment

[0034] Select ionic liquid [Bmim][Cl] and mix them with coal slurry S and K respectively, put them in a centrifuge for centrifugation, and separate the solid and liquid, then put the upper liquid into the beaker of activated carbon, and put the liquid into the beaker after adsorption The recovered ionic liquid was obtained by evaporating in an environment of 80°C and testing its conductivity. The recovered liquid and [Bmim][Cl] were analyzed by FTIR. The analysis results are as follows:

[0035] (1) By testing its conductivity and comparing the conductivity of [Bmim][Cl], it is found that the conductivity of the recovered ionic liquid is close to 85-95%.

[0036] (2) The recoverable rate is 85-95% by analyzing the conductivity.

[0037] (3) After analyzing the FTIR of the three liquids, it was found that the peak positions and intensities were basically unchanged.

[0038] (4) After comparison by FTIR, it is found that the composition and properties of the recovered ionic li...

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Abstract

The invention discloses a recycling method of coal mine ionic liquid inhibitor. The recycling method comprises the steps of intensively recycling ionic liquid after inhibition mainly through a mine drainage system, and increasing the pressure to transport the ionic liquid to a recycling pond in an industrial square; introducing the liquid in the recycling pond into a separator, conducting solid-liquid separation, and removing impurities; introducing the liquid after impurity removal into an evaporator for evaporation; conducting concentration and condensation on the liquid after evaporation through a condenser, transporting the liquid to an ionic liquid disposal station, and conducting recycling. Compared with other recycling methods, the recycling method of the coal mine ionic liquid inhibitor has the advantages of being high in recovery rate, simple and convenient to operate, economical and practical.

Description

technical field [0001] The invention relates to the fields of coal mines and environmental protection, in particular to a method for recovering coal mine ionic liquid inhibitors. Background technique [0002] Coal spontaneous combustion seriously threatens the safe production of coal mines. In my country, coal spontaneous combustion has become one of the main natural disasters in coal mines. Chemical inhibitors have achieved good results in preventing coal spontaneous combustion. Ionic liquid inhibitors are called new inhibitors, which can fundamentally destroy the microstructure of coal molecules, reduce the number of active groups in coal molecules, and thus achieve the effect of inhibiting coal spontaneous combustion. However, ionic liquids can react with coal, etc. While inhibiting the spontaneous combustion of coal, it also destroys the molecular structure of coal, thereby losing its spontaneous combustion. Moreover, the accumulated ionic liquid inhibitor can destroy o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/10
Inventor 邓军肖旸白祖锦徐启铭王彩萍易欣
Owner XIAN UNIV OF SCI & TECH