Coal biological desulfurization method

A biological desulfurization and coal technology, which is applied in the field of coal processing, can solve the problems of only 57.8% desulfurization rate, long operation cycle, and low desulfurization efficiency, and achieve the effect of increasing use value, low equipment requirements, and process optimization

Inactive Publication Date: 2016-03-16
GUANGXI KUONENGBA ENERGY TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coal biological desulfurization method has constraints such as long operation period and low desulfurization efficiency.
For example, the invention patent with the patent number: ZL2014101802599 discloses a method for coal biological desulfurization of coal. The desulfurization cycle of this method is as long as dozens of days, but the desulfurization rate is only 57.8%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for biological desulfurization of coal, comprising the following steps:

[0027] (1) Put the coal into the reaction kettle, add water and bacterial solution A, mix well, and react at room temperature for 3 hours;

[0028] (2) at a temperature of 20°C, stirring and reacting for 7 hours;

[0029] (3) Add bacterial solution B to the reaction kettle, and stir and react for 15 hours at a temperature of 35°C;

[0030] (4) washing the coal in the reaction kettle with water while stirring, drying after filtering to obtain the desulfurized coal;

[0031] The culture method of the bacterial liquid A in the step (1) is as follows: collect the Thiobacillus ferrooxidans bacterial liquid, add the sterilized medium, propagate at 30°C for 15 days, and then separate and purify the bacteria to obtain the concentration 1.9×10 8 A / mL bacterial solution A;

[0032] The bacterium liquid B in the described step (3) is Sulfolobus acidocaldarius bacterium liquid, and concentration ...

Embodiment 2

[0036] A method for biological desulfurization of coal, comprising the following steps:

[0037] (1) Put the coal into the reactor, add water and bacterial solution A, mix well, and react at room temperature for 7 hours;

[0038] (2) at a temperature of 25° C., stirring and reacting for 3 hours;

[0039] (3) Add bacterial solution B to the reaction kettle, and stir and react for 17 hours at a temperature of 30°C;

[0040] (4) washing the coal in the reaction kettle with water while stirring, drying after filtering to obtain the desulfurized coal;

[0041] The cultivation method of the bacteria liquid A in the step (1) is as follows: collect the Thiobacillus ferrooxidans bacteria liquid, add the sterilized medium, propagate at 35°C for 10 days, and then separate and purify the bacteria to obtain the concentration 1.9×10 7 A / mL bacterial solution A;

[0042] The bacterium liquid B in the described step (3) is Sulfolobus acidocaldarius bacterium liquid, and concentration is 1...

Embodiment 3

[0046] A method for biological desulfurization of coal, comprising the following steps:

[0047] (1) Put the coal into the reaction kettle, add water and bacterial solution A, mix well, and react at room temperature for 5 hours;

[0048] (2) at a temperature of 23° C., stirring and reacting for 5 hours;

[0049] (3) Add bacterial solution B into the reaction kettle, and stir and react for 16 hours at a temperature of 32°C;

[0050] (4) washing the coal in the reaction kettle with water while stirring, drying after filtering to obtain the desulfurized coal;

[0051] The cultivation method of the bacteria liquid A in the step (1) is as follows: collect the Thiobacillus ferrooxidans bacteria liquid, add the sterilized medium, propagate at 33°C for 13 days, and then separate and purify the bacteria to obtain the concentration 1.9×10 8 A / mL bacterial solution A;

[0052] The bacterium liquid B in the described step (3) is Sulfolobus acidocaldarius bacterium liquid, and concentr...

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PUM

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Abstract

The invention discloses a coal biological desulfurization method which comprises the following steps: (1) putting coal into a reaction kettle, adding water and a thiobacillus ferrooxidans solution, uniformly mixing, and conducting reaction at the room temperature for 3-7 h; (2) conducting stirring and reaction at the temperature of 20-25 DEG C for 3-7 h; (3) adding a sulfolobus acidocaldarius solution into the reaction kettle, and conducting stirring and reaction at the temperature of 30-35 DEG C for 15-17 h; (4) conducting water washing on coal in the reaction kettle while stirring, filtering and drying so as to obtain desulfurized coal. The coal biological desulfurization method is low in equipment requirements, has no damage on coal structure, is short in desulfurization time and high in efficiency, is beneficial to ecological environment protection, and has excellent market prospects.

Description

technical field [0001] The invention belongs to the technical field of coal processing, and in particular relates to a method for biological desulfurization of coal. Background technique [0002] Coal is an important fuel in my country, and its position in the primary energy consumption structure will not change in the foreseeable future. It is estimated that 90% of the SO2 discharged into the atmosphere in my country comes from the combustion of coal. Therefore, it is of great significance to study economical and effective desulfurization technology. Recently, the coal desulfurization process can be divided into: desulfurization before combustion, desulfurization during combustion and desulfurization after combustion. [0003] Desulfurization before combustion can reduce ash at the same time, reduce transportation costs, reduce sulfur content in flue gas, reduce corrosion of boilers and flues, thereby reducing tailings treatment and equipment maintenance costs, environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/00
Inventor 崔素清梁杰锋张亮吴巧丽
Owner GUANGXI KUONENGBA ENERGY TECH DEV CO LTD
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