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Desulfuration method of clean coal

A technology for cleaning coal and coal samples, which is applied in the field of coal processing to achieve the effects of improved combustion performance, low energy consumption and simple operation steps

Inactive Publication Date: 2010-09-15
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further searches did not find any studies using metal hydrides for coal desulfurization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0021] Examples 1-6: Effects of Different Particle Sizes on the Removal of Sulfur in Various Forms

[0022]

[0023]

[0024] At 30°C, put 3g of coal samples with particle sizes of 0.85mm, 0.106mm and 0.075mm into 50ml of water for low-speed homogenization for about 30min, then add 0.003g of NaBH 4 , Stir the coal slurry for 1min and stop. The results showed that the removal rate of total sulfur increased with the decrease of particle size, and the removal rate of organic sulfur increased significantly. When the coal particle size is 0.075mm, the total sulfur removal rates of Yanzhou coal and Yanshan coal are 42.9% and 53.1%, respectively. Among them, the removal rates of iron sulfide sulfur, sulfate sulfur and organic sulfur in Yanzhou coal were 35.6%, 89.2% and 18.3% respectively; the removal rates of iron sulfide sulfur, sulfate sulfur and organic sulfur in Qianshan coal were 72.3%, 100% and 26.8% respectively. %.

Embodiment 7～9

[0025] Embodiment 7~9: the influence of different liquid media on total sulfur removal rate

[0026]

[0027] Under the condition of 30°C, put 3g of coal samples with particle size of 0.18mm in 50ml of water, 50ml of methanol and 50ml of ethanol and homogenize at low speed for about 30min, then add 0.003g of NaBH 4 , Stir the coal slurry for 1min and stop. The results show that the total sulfur removal rates of Yanzhou coal and Yanshan coal range from 26.3 to 28.9% and 32.7 to 35.2%, respectively.

Embodiment 10～12

[0028] Embodiment 10~12: the influence of different temperatures on total sulfur removal rate

[0029]

[0030] Under the conditions of 4°C, 30°C and 60°C, put 3g of coal samples with a particle size of 0.18mm into 50ml of water for low-speed homogenization for about 30min, then add 0.003g of NaBH 4 , Stir the coal slurry for 1min and stop. The results show that the total sulfur removal rates of Yanzhou coal and Yanshan coal range from 23.1 to 27.7% and 30.1 to 33.8%, respectively.

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Abstract

The invention discloses a desulfuration method of clean coal, belonging to the technical field of coal treatment. After particle coal samples are mixed with liquid medium, metal hydride is added for being reduced and desulfurized, then the obtained product is stirred, filtered out water and dried, and the desulfurized clean coal is prepared. Compared with the prior art, the invention has small reagent usage amount, high reaction speed, small energy consumption and small coal particle diameter; reaction can be carried out at normal temperature and normal voltage; the coal particle diameter is smaller, the total sulfur removal amount is higher; organic sulfur removal rate is obviously improved, which shows that the technology is easy to process powdery coal hard to process industrially; a reaction device is simple, is easy to magnify and has simple operation; after coal is processed, coal combustion performance is improved, which shows that calorific value is improved and light-off temperature is lowered.

Description

technical field [0001] The invention relates to a processing method in the technical field of coal processing, in particular to a clean coal desulfurization method. Background technique [0002] Medium and high-sulfur coal with a sulfur content higher than 2% accounts for 1 / 4 of my country's total coal reserves, so the development of economical and effective coal desulfurization technology has become one of the most urgent tasks in the energy field. 2 The most important project for the total pollution control goal is also an inevitable choice for the development of clean energy. [0003] The currently reported desulfurization methods of coal before combustion include physical methods, microbial methods, chemical methods, pyrolysis methods, and radiation-assisted oxidation methods. Physical methods can only remove part of iron sulfide sulfur, and have no effect on organic sulfur. The microbial method mainly uses Thiobacillus ferrooxidans and Thiobacillus thiooxidans, which ...

Claims

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Application Information

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IPC IPC(8): C10L9/02
Inventor 贾金平李志凌孙同华
Owner SHANGHAI JIAO TONG UNIV
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