Environmental-protection biological desulfurization process

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

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 process has constraints such as long operation period and low desulfurization efficiency.
For example, the patent number is: ZL2014101802599 invention patent, which discloses a biological desulfurization process for 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] An environmentally friendly biological desulfurization process, 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 8 hours;

[0028] (2) Stirring and reacting for 4 hours at a temperature of 29°C;

[0029] (3) Add bacterial solution B to the reaction kettle, and stir and react for 5 hours at a temperature of 39°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 28°C for 13 days, and then separate and purify the bacteria to obtain the concentration 1.7×10 8 A / mL bacterial solution A;

[0032] The bacteria liquid B in the step (3) is made from the thermophilic acid-resistant sulfur coccus ba...

Embodiment 2

[0036] An environmentally friendly biological desulfurization process, 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 30° C., stirring and reacting for 2 hours;

[0039] (3) Add bacterial solution B to the reaction kettle, and stir and react for 3 hours at a temperature of 45°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 28°C for 15 days, and then separate and purify the bacteria to obtain the concentration 1.7×10 7 A / mL bacterial solution A;

[0042] The bacteria liquid B in the step (3) is made from the thermophilic acid-resistant sulfur coccus bacteri...

Embodiment 3

[0046] An environmentally friendly biological desulfurization process, comprising the following steps:

[0047] (1) Put the coal into the reactor, add water and bacterial solution A, mix well, and react at room temperature for 10 hours;

[0048] (2) at a temperature of 25° 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 35°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 28°C for 10 days, and then separate and purify the bacteria to obtain the concentration 1.7×108 A / mL bacterial solution A;

[0052] The bacteria liquid B in the step (3) is made from the thermophilic acid-resistant sulfur coccus bacteria...

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PUM

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Abstract

The invention discloses an environmental-protection biological desulfurization process including the following steps: (1) putting coal in a stirring reaction kettle, adding water and a thiobacillus ferrooxidans liquid, mixing the mixture evenly, and carrying out a reaction for 7-10 h at room temperature; (2) at the temperature of 25-30 DEG C, carrying out a stirring reaction for 2-5 h; (3) adding a sulfosphaerellus thermoacidophilum liquid and a rhodococcus rhodochrous liquid in the reaction kettle, and at the temperature of 35-45 DEG C, carrying out a stirring reaction for 3-6 h; and (4) washing the coal in the reaction kettle with water while stirring, filtering, and then drying to obtain desulfurization coal. The biological desulfurization process has low requirements for equipment, has no damage to a coal structure, is short in desulfurization time and high in efficiency, is beneficial 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 an environment-friendly biological desulfurization process. 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,...

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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