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Biological desulfurization method for coal

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

Inactive Publication Date: 2016-03-02
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 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 reactor, add water and bacterial solution A, mix well, and react at room temperature for 9 hours;

[0028] (2) Stirring and reacting for 3 hours at a temperature of 32°C;

[0029] (3) Add bacterial solution B to the reaction kettle, and stir and react for 18 hours at a temperature of 36°C;

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

[0031] 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 12 days, and then separate and purify the bacteria to obtain the concentration 1.8×10 8 A / mL bacterial solution A;

[0032] The bacterium solution B in the step (3) is the bacterium solution of Junterospira ferrous oxide, and the concentration i...

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 10 hours;

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

[0039] (3) Add bacterial solution B into the reaction kettle, and stir and react for 15 hours at a temperature of 40°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 25°C for 15 days, and then separate and purify the bacteria to obtain the concentration 1.8×10 7 A / mL bacterial solution A;

[0042] The bacterium solution B in the step (3) is the bacterium solution of Junterospira ferrous oxide, and the concentra...

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 35° C., stirring and reacting for 5 hours;

[0049] (3) Add bacterial solution B into the reaction kettle, and stir and react for 20 hours at a temperature of 30°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 bacteria liquid A in the step (1) is as follows: collect the Thiobacillus ferrooxidans bacteria liquid, add the sterilized medium, propagate at 30°C for 10 days, and then separate and purify the bacteria to obtain the concentration 1.8×10 8 A / mL bacterial solution A;

[0052] The bacterium solution B in the step (3) is the bacterium solution of Junterospira ferrous oxide, and the concen...

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Abstract

The invention discloses a biological desulfurization method for coal. The biological desulfurization method includes the following steps: (1) putting the coal into a reaction kettle, adding water and a thiobacillus ferrooxidans liquid, mixing evenly the mixture, and carrying out a reaction for 5-10 h at room temperature; (2) at the temperature of 30-35 DEG C, carrying out a stirring reaction for 2-5 h; (3) adding a leptospirillum ferrooxidans liquid in the reaction kettle, and at the temperature of 30-40 DEG C, carrying out a stirring reaction for 15-20 h; and (4) washing the coal in the reaction kettle with water while stirring, filtering, and then drying to obtain the desulfurization coal. The biological desulfurization method for the coal has low requirements for equipment, has no destroy to a coal structure, is short in desulfurization time, high in efficiency, and favorable for protection of the ecological environment, and has a 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 method 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, environmental...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/00C12R1/01
Inventor 崔素清梁杰锋张亮吴巧丽
Owner GUANGXI KUONENGBA ENERGY TECH DEV CO LTD
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