Method for strengthening oxidative desulfurization and deashing of high-sulfur coal by coupling effect of electric field and pyrolusite

A technology for oxidative desulfurization and pyrolusite is applied in the field of pre-combustion desulfurization of coal, which can solve the problems of reducing coal quality, high cost, and strong reaction conditions, and achieve the effects of improving coal quality, high added value and simple operation.

Inactive Publication Date: 2021-01-12
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] ①Secondary pollution is large, and some additives are difficult to remove
[0005] ②The reaction conditions are strong, the process is complex,

Method used

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  • Method for strengthening oxidative desulfurization and deashing of high-sulfur coal by coupling effect of electric field and pyrolusite
  • Method for strengthening oxidative desulfurization and deashing of high-sulfur coal by coupling effect of electric field and pyrolusite
  • Method for strengthening oxidative desulfurization and deashing of high-sulfur coal by coupling effect of electric field and pyrolusite

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Experimental program
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Effect test

Embodiment 1

[0034] A method for strengthening the oxidative desulfurization and deashing of high-sulfur coal through the coupled action of an electric field and pyrolusite, specifically comprising the following steps:

[0035] (1) Pretreatment steps of raw coal:

[0036] After the coal sample is dried, it is sent to a grinding or ball mill to crush it to a certain particle size, and the flotation method is used to adopt different pretreatment methods according to the flotation results, and the raw coal and the pretreated coal sample are subjected to industrial analysis, elemental analysis, total sulfur content, organic sulfur content, inorganic sulfur content (sulphate sulfur, pyrite sulfur);

[0037] According to the pretreatment scheme, scheme B was used for pretreatment in this experiment. Under the condition of 60°C, 5mol / L hydrochloric acid was used for acid leaching treatment of high-sulfur raw coal powder to be treated for 6h, and washed with a large amount of deionized water until...

Embodiment 2

[0050] A method for strengthening the oxidative desulfurization and deashing of high-sulfur coal through the coupled action of an electric field and pyrolusite, specifically comprising the following steps:

[0051] (1) Pretreatment steps of raw coal:

[0052] After the coal sample is dried, it is sent to a grinding or ball mill to crush it to a certain particle size, and the flotation method is used to adopt different pretreatment methods according to the flotation results, and the raw coal and the pretreated coal sample are subjected to industrial analysis, elemental analysis, total sulfur content, organic sulfur content, inorganic sulfur content (sulphate sulfur, pyrite sulfur);

[0053] According to the pretreatment plan, plan A was used in this experiment for pretreatment. Under the condition of 60°C, 5 mol / L hydrochloric acid was used to acid-leach the high-sulfur raw coal powder to be treated for 6 hours, and then washed with a large amount of deionized water until neutr...

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Abstract

The invention belongs to the field of strengthening desulfurization of high-sulfur coal before combustion under the coupling action of an electric field and an oxidizing agent, and discloses an experimental method for improving the quality of the high-sulfur coal by utilizing the strong oxidizing property of manganese dioxide. According to the method, pyrolusite and high-sulfur coal are uniformlymixed and subjected to acid leaching. The pyrolusite preferentially oxidizes a sulfur-containing inorganic phase in a coal matrix under the action of an electric field, and then after part of organiccompounds are hydrogenated, iron ions and manganese ions produced after the pyrite is dissolved can help to oxidize and desulfurize the sulfur-containing organic phase in the coal. Under the auxiliaryaction of an electric field, the desulfurization effect of organic sulfur in coal is better. The whole set of technological process is simple, convenient to operate, low in pollution, low in energy consumption, high in efficiency and green, and an environment-friendly and efficient desulfurization method is provided for coal desulfurization before combustion.

Description

technical field [0001] The invention belongs to the technical field of desulfurization before coal combustion, and specifically relates to a method for strengthening the oxidation desulfurization and deashing of high-sulfur coal through the coupling action of an electric field and pyrolusite. Background technique [0002] At present, in my country's energy consumption ratio, coal has always occupied more than 68% of the share, much higher than gasoline, natural gas and other energy sources. Therefore, coal will still be the main supplier of energy in my country in the next few decades. With the introduction of the concept of global warming and sustainable development, the contradiction between energy pollution and energy demand has become increasingly intensified. Therefore, by improving the efficiency of coal use and reducing the discharge of pollutants such as sulfur dioxide, the maximum protection of our natural environment is the solution The key to national economic de...

Claims

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Application Information

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IPC IPC(8): C10L9/06C22B47/00C22B3/08C22B3/44
CPCC10L9/06C22B47/00C22B3/08C22B3/44
Inventor 刘作华袁海洋陶长元吴丙山刘仁龙杜军谢昭明范兴张雄栾进华胡峰崔志伟
Owner CHONGQING UNIV
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