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Coal flotation and desulfuration combined inhibitor and application thereof

A combined inhibitor and flotation desulfurization technology, which is applied in the petroleum industry, solid fuels, fuels, etc., can solve the problems of no organic sulfur removal effect and general removal effect, and achieve the convenience of large-scale industrial application, component well-designed effects

Active Publication Date: 2016-02-17
SHENZHEN RUICHENG SHIDAI IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing desulfurization inhibitors, such as quicklime, sodium sulfite, dextrin, etc., can only remove part of inorganic sulfur, and the removal effect is general, and basically have no removal effect on organic sulfur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The properties of a high-sulfur coal in Yunnan are: ash content 28%, total sulfur 3.4% (of which inorganic sulfur is 2.5%, organic sulfur 0.9%), the flotation desulfurization and ash reduction process of "one rough, four fine and three sweeping" is adopted, and the concentration of coal slurry is 200g / L, the amount of collector (n-dodecane) is 800g / t, the amount of foaming agent (secondary octanol) is 100g / t, and the inhibitor (composed of sodium humate: sulfuric acid: ethanol=80:10 : 10) The dosage is 3000g / t, and the qualified clean coal product with an ash content of 5.1% and a total sulfur content of 0.9% (wherein the inorganic sulfur is 0.2%, and the organic sulfur is 0.7%) is obtained.

Embodiment 2

[0034] The properties of a high-sulfur coal in Guizhou are: ash content 33%, total sulfur 4.2% (of which inorganic sulfur is 3.6%, organic sulfur 0.6%), and the flotation desulfurization and ash reduction process of "one rough, four fine and three sweeping" is adopted, and the concentration of coal slurry is 200g / L, the amount of collector (n-dodecane) is 800g / t, the amount of foaming agent (secondary octanol) is 100g / t, and the inhibitor {is composed of [sodium humate (80%)+tannin (20%)]: hydrochloric acid: [acetic acid (50%)+ethanol (50%)]=70:15:15) consumption is 5000g / t, has obtained ash and is divided into 6.2%, and total sulfur is 0.8% (wherein inorganic sulfur 0.3%, organic sulfur 0.5%) qualified clean coal products.

Embodiment 3

[0036] The properties of a high-sulfur coal in Guizhou are as follows: ash content 35%, total sulfur 3.2% (including 3.0% inorganic sulfur and 0.2% organic sulfur). The flotation desulfurization and ash reduction process of "one coarse, four fine and three sweeping" is adopted, and the concentration of coal slurry is 250g / L, the amount of collector (kerosene) is 800g / t, the amount of foaming agent (2# oil) is 100g / t, and the inhibitor {is composed of [carboxymethylcellulose (80%)+tannin (20 %)]: nitric acid: ethyl acetate = 70:13:17) in an amount of 5000g / t, obtained a qualified clean coal with an ash content of 4.7%, and a total sulfur content of 0.5% (wherein the inorganic sulfur was 0.4%, and the organic sulfur was 0.1%) product.

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Abstract

The invention relates to a coal flotation and desulfuration combined inhibitor and an application thereof, and belongs to the technical field of coal washing and dressing. The coal flotation and desulfuration combined inhibitor is prepared from, by mass, 60% to 80% of active ingredient, 10% to 20% of accelerant and 10% to 20% of organic solvent. The active ingredient is selected from at least one of carboxymethylcellulose, humic acid, humate and tannin. The accelerant is selected from at least one of sulfuric acid, muriatic acid and nitric acid. The organic solvent is selected from at least one of acetic acid, ethanol, ethyl acetate and acetone. According to the designed desulfuration inhibitor, after flotation and desulfuration are carried out on sulphur coal, the vast majority of inorganic sulfur and part of organic sulfur can be removed, so that the total sulphur content of obtained clean coal products is below 1%. The desulfuration inhibitor is reasonable in ingredient design, and large-scale industrial application is facilitated.

Description

technical field [0001] The invention relates to a coal flotation desulfurization combined inhibitor and an application thereof, belonging to the technical field of coal washing and processing. Background technique [0002] Coal accounts for more than 70% of my country's primary energy supply, and the combustion of inorganic compounds in coal is the main cause of air pollution and widespread acid rain in many cities in China. Sulfur is the most common harmful element in coal. When coal is directly burned as a primary energy source, about 90% of the sulfur in it is converted into SO 2 into the atmosphere, SO 2 It is the main cause of acid rain, which will cause great harm to the environment. There are about 2.5×10 7 t SO 2 Into the atmosphere, of which 90% from the combustion of coal. [0003] The sulfur content of coal in my country generally ranges from 0.38% to 5.32%, with an average of 1.72%, and high-sulfur coal accounts for about 33.33% of coal reserves and 16.67% ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10
Inventor 符剑刚陈凯达欧阳征国邹代树魏海波
Owner SHENZHEN RUICHENG SHIDAI IND CO LTD
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