Biological desulfurization technology used for coal

A biological desulfurization and process technology, 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 improving use value, low equipment requirements, and good desulfurization effect

Inactive Publication Date: 2016-04-20
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 process 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 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 biological desulfurization process for coal, comprising the following steps:

[0027] (1) Put the coal into the reactor, add water and bacterial solution A, mix well, and react at room temperature for 7 hours;

[0028] (2) Stirring and reacting for 3 hours at a temperature of 26° C.;

[0029] (3) Add bacterial solution B to the reaction kettle, and stir and react for 7 hours at a temperature of 37°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 bacteria liquid A in the step (1) is as follows: collect the Thiobacillus ferrooxidans bacteria liquid, add the sterilized medium, propagate at 29°C for 6 days, and then separate and purify the bacteria to obtain the concentration 1.5×10 8 A / mL bacterial solution A;

[0032] The bacterial liquid B in the step (3) is made from the bacterial liquid of Thiobacillus thiooxidans and the bacterial liquid o...

Embodiment 2

[0036] A biological desulfurization process for 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 10 hours;

[0038] (2) at a temperature of 30° C., stirring and reacting for 2 hours;

[0039] (3) Add bacterial solution B to the reaction kettle, and stir and react for 8 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 29° C. for 7 days, and then separate and purify the bacteria to obtain the concentration 1.5×10 7 A / mL bacterial solution A;

[0042] The bacterial liquid B in the step (3) is made from the bacterial liquid of Thiobacillus thiooxidans and the bacterial ...

Embodiment 3

[0046] A biological desulfurization process for 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 20°C, stirring and reacting for 5 hours;

[0049] (3) Add bacterial solution B to the reaction kettle, and stir and react for 6 hours at a temperature of 40°C;

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

[0051] 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 29°C for 5 days, and then separate and purify the bacteria to obtain the concentration 1.5×108 A / mL bacterial solution A;

[0052] The bacterial liquid B in the step (3) is made from the bacterial liquid of Thiobacillus thiooxidans and the bacterial l...

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PUM

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Abstract

The invention discloses a biological desulfurization technology used for coal. The biological desulfurization technology comprises the following steps: 1) placing coal in a reaction vessel, adding water and a thiobacillus ferrooxidans solution, uniformly mixing the materials and reacting the materials for 5-10 hours at room temperature; 2) at temperature of 20-30 DEG C, stirring a reaction product and reacting the product for 2-5 hours; 3) adding a thiobacillus thiooxidans solution and a rhodococcus rhodochrousin solution in the reaction vessel, stirring the materials and reacting the materials for 6-8 hours at temperature of 30-40 DEG C; and 4) washing the coal in the reaction vessel while being stirred, and filtering the coal and drying the coal to obtain the desulfurated coal. The biological desulfurization technology has low requirement on equipment, has no damage on coal structure, has the advantages of short desulphurization time and high efficiency, is in favor of protection of ecological environment, and has good market prospect.

Description

technical field [0001] The invention belongs to the technical field of coal processing, and in particular relates to a biological desulfurization process for 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, environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/02
CPCC10L9/02
Inventor 崔素清梁杰锋张亮吴巧丽
Owner GUANGXI KUONENGBA ENERGY TECH DEV CO LTD
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