CN105505512A - Microbial desulfurization method for coal - Google Patents
Microbial desulfurization method for coal Download PDFInfo
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- CN105505512A CN105505512A CN201510834389.4A CN201510834389A CN105505512A CN 105505512 A CN105505512 A CN 105505512A CN 201510834389 A CN201510834389 A CN 201510834389A CN 105505512 A CN105505512 A CN 105505512A
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- bacterium liquid
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- bacterium
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
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Abstract
The invention discloses a microbial desulfurization method for coal. The method includes the steps of: (1) putting coal into a stirring reaction kettle, adding water and a Thiobacillus ferrooxidans bacterial solution, mixing the substances evenly, carrying out reaction at room temperature for 2-5h; (2) at a temperature of 25-30DEG C, carrying out stirring reaction for 5-10h; (3) adding a Thiobacillus thiooxidans bacterial solution and a Sulfolobus acidocaldarius bacterial solution into the reaction kettle, carrying out stirring reaction at 35-45DEG C for 10-15h; and (4) washing the coal in the reaction kettle under stirring, and carrying out filtering and drying, thus obtaining desulfurized coal. The microbial desulfurization method provided by the invention has the advantages of low equipment requirement, no damage to coal structure, short desulfurization time and high efficiency, is in favor of ecological environment protection and has good market prospect.
Description
Technical field
The invention belongs to coal processing technique field, be specifically related to a kind of microbial desulfurization method of coal.
Background technology
Coal is the important fuel of China, and in predictable future, its status in primary energy source consumption structure can not change.According to estimates, China to enter in the SO2 of air 90% every year from burning of coal.Therefore, cost-effective desulfurization technology is studied significant.A few days ago, coal desulfurization technique can be divided: desulfurization and the rear desulfurization of burning in desulfurization before burning, burning.
Desulfurization before burning, can fall ash simultaneously, reduces transportation cost, reduces the content of sulfureous in flue gas, alleviates the corrosion to boiler and flue, thus reduces, tailings process and equipment maintenance cost, environmental benefit and remarkable in economical benefits, therefore desirable.Before coal burning, desulfurization has physical method, chemical process and microbial process.Wherein, the feature of microbial process desulfurization is that process costs is low, saving energy, and flow process is simple, and reaction conditions is gentle, and environment is bought clearly, meets the chemical industry trend of eco-friendly, has caused the common concern of people.
Before coal combustion, biological process desulfurization is the clean coal technology having very much development potentiality, has safety, environmental protection, low consumption and efficient feature.But it is longer to there is the operational cycle in the Coal Desulfurization with Microbe Techniques, the not high restraining factors of desulfuration efficiency.As the patent No. is: the patent of invention of ZL2014101802599, disclose a kind of biological desulfurization method of coal, the method desulfurization cycle reaches tens of sky, and desulfurization degree is only 57.8%.
Summary of the invention
For solving the problem, the invention provides a kind of microbial desulfurization method of coal, the method is low for equipment requirements, and to texture of coal without destruction, desulfurization time is short, efficiency is high.
Technical scheme of the present invention is as follows:
. a kind of microbial desulfurization method of coal, comprises the following steps:
(1) put in reactor by coal, add water and bacterium liquid A, mixing, reacts 2-5 hour under room temperature;
(2) at the temperature of 25-30 DEG C, stirring reaction 5-10 hour;
(3) in reactor, bacterium liquid B is added again, at the temperature of 35-45 DEG C, stirring reaction 10-15 hour;
(4) coal in reactor is washed in stirring, filter post-drying and namely obtain desulfurized coal;
The cultural method of the bacterium liquid A of described step (1) is: gather thiobacillus ferrooxidant bacterium liquid, add the substratum of sterilising treatment, at 25-35 DEG C, breed 5-10 days, then carry out the isolation and purification of bacterium, obtaining concentration is 1.9 × 10
7-1.9 × 10
8individual/mL bacterium liquid A;
Bacterium liquid B in described step (3) is made up according to the volume ratio of 2:1 of thiobacillus thiooxidans bacterium liquid and acid heat sulfolobus solfataricus bacterium liquid, and the concentration of described thiobacillus thiooxidans bacterium liquid is 1.5 × 10
5-1.5 × 10
6individual/mL, the concentration of described acid heat sulfolobus solfataricus bacterium liquid is 2.5 × 10
5-2.5 × 10
6individual/mL;
The usage ratio of the bacterium liquid B in the coal in described step (1), the water added, bacterium liquid A and step (3) is 100kg:60kg:2ml:1ml.
In the cultural method of described bacterium liquid A, described substratum is made up of by weight following raw material: (NH
4)
2hPO
33 parts, KCl0.2 part, MgSO
47H
2o0.6 part, Fe
2(SO
4)
37H
2o45 part, distilled water 1000 parts.
Inorganic sulfur removes principle:
Microorganism is preferentially adsorbed on the lower lattice defect of surface energy and edge regions, and oxidizing reaction occurs.Along with reaction is carried out, microorganism is along pyrite joint fissure and lattice defect diffusion, and corrode oxidation progressively deeply, until reaction terminates, pyrite is oxidized to SO
4 2-and Fe
3+.
In addition, to Fe
2+there is the microorganism of oxidation capacity by Fe
2+rapid oxidation is Fe
3+, Fe
3+react as strong oxidizer and pyrite, pyritic sulphur is oxidized to SO
4 2-or elementary sulfur.
Organic sulfur removal principle:
Organic sulfur in coal is combined in coal macromolecule skeleton with C-S bond, is cut off by C-S key and reach the object of organic sulfide removal by microbial process.
Beneficial effect of the present invention is:
1. microbial desulfurization method of the present invention, by the optimization of technique, low for equipment requirements, and also can reach good sweetening effectiveness without the need to being carried out pulverizing by coal, enormously simplify desulfurization operations step, decreases artificial, reduce cost.
2. microbial inoculum of the present invention easily obtains, and through optimization culture, desulfurization degree is greatly improved, and desulfurization degree reaches more than 85%.
3. microbial desulfurization method of the present invention, to texture of coal without obvious destruction, desulfurization time is short, efficiency is high, reduces the pollution of environment, improves the use value of coal.
Embodiment
Embodiment 1
A microbial desulfurization method for coal, comprises the following steps:
(1) coal is put in reactor, add water and bacterium liquid A, mixing, react 2 hours under room temperature;
(2) at the temperature of 25-30 DEG C, stirring reaction 5 hours;
(3) in reactor, bacterium liquid B is added again, at the temperature of 45 DEG C, stirring reaction 15 hours;
(4) coal in reactor is washed in stirring, filter post-drying and namely obtain desulfurized coal.
The bacterium liquid A of described step (1) is thiobacillus ferrooxidant bacterium liquid, and through optimization culture, described optimization culture method is: gather thiobacillus ferrooxidant bacterium liquid, add the substratum of sterilising treatment, breed 5 days at 25 DEG C, then carry out the isolation and purification of bacterium, obtaining concentration is 1.9 × 10
7individual/mL optimizes bacterium liquid A; Above-mentioned substratum is made up of by weight following raw material: (NH
4)
2hPO
33 parts, KCl0.2 part, MgSO
47H
2o0.6 part, Fe
2(SO
4)
37H
2o45 part, distilled water 1000 parts.
Bacterium liquid B in described step (3) is made up according to the volume ratio of 2:1 of thiobacillus thiooxidans bacterium liquid and acid heat sulfolobus solfataricus bacterium liquid, and the concentration of described thiobacillus thiooxidans bacterium liquid is 1.5 × 10
5individual/mL, the concentration of described acid heat sulfolobus solfataricus bacterium liquid is 2.5 × 10
5individual/mL.
The usage ratio of the bacterium liquid B in the coal in described step (1), the water added, bacterium liquid A and step (3) is 100kg:60kg:2ml:1ml.
Embodiment 2
A microbial desulfurization method for coal, comprises the following steps:
(1) coal is put in reactor, add water and bacterium liquid A, mixing, react 5 hours under room temperature;
(2) at the temperature of 30 DEG C, stirring reaction 10 hours;
(3) in reactor, bacterium liquid B is added again, at the temperature of 35 DEG C, stirring reaction 10 hours;
(4) coal in reactor is washed in stirring, filter post-drying and namely obtain desulfurized coal.
The bacterium liquid A of described step (1) is thiobacillus ferrooxidant bacterium liquid, and through optimization culture, described optimization culture method is: gather thiobacillus ferrooxidant bacterium liquid, add the substratum of sterilising treatment, breed 10 days at 35 DEG C, then carry out the isolation and purification of bacterium, obtaining concentration is 1.9 × 10
8individual/mL optimizes bacterium liquid A; Above-mentioned substratum is made up of by weight following raw material: (NH
4)
2hPO
33 parts, KCl0.2 part, MgSO
47H
2o0.6 part, Fe
2(SO
4)
37H
2o45 part, distilled water 1000 parts.
Bacterium liquid B in described step (3) is made up according to the volume ratio of 2:1 of thiobacillus thiooxidans bacterium liquid and acid heat sulfolobus solfataricus bacterium liquid, and the concentration of described thiobacillus thiooxidans bacterium liquid is 1.5 × 10
6individual/mL, the concentration of described acid heat sulfolobus solfataricus bacterium liquid is-2.5 × 10
6individual/mL.
The usage ratio of the bacterium liquid B in the coal in described step (1), the water added, bacterium liquid A and step (3) is 100kg:60kg:2ml:1ml.
Embodiment 3
A microbial desulfurization method for coal, comprises the following steps:
(1) coal is put in reactor, add water and bacterium liquid A, mixing, react 3 hours under room temperature;
(2) at the temperature of 29 DEG C, stirring reaction 6 hours;
(3) in reactor, bacterium liquid B is added again, at the temperature of 38 DEG C, stirring reaction 12 hours;
(4) coal in reactor is washed in stirring, filter post-drying and namely obtain desulfurized coal.
The bacterium liquid A of described step (1) is thiobacillus ferrooxidant bacterium liquid, and through optimization culture, described optimization culture method is: gather thiobacillus ferrooxidant bacterium liquid, add the substratum of sterilising treatment, breed 7 days at 28 DEG C, then carry out the isolation and purification of bacterium, obtaining concentration is 1.9 × 10
8individual/mL optimizes bacterium liquid A; Above-mentioned substratum is made up of by weight following raw material: (NH
4)
2hPO
33 parts, KCl0.2 part, MgSO
47H
2o0.6 part, Fe
2(SO
4)
37H
2o45 part, distilled water 1000 parts.
Bacterium liquid B in described step (3) is made up according to the volume ratio of 2:1 of thiobacillus thiooxidans bacterium liquid and acid heat sulfolobus solfataricus bacterium liquid, and the concentration of described thiobacillus thiooxidans bacterium liquid is 1.5 × 10
6individual/mL, the concentration of described acid heat sulfolobus solfataricus bacterium liquid is 2.5 × 10
6individual/mL.
The usage ratio of the bacterium liquid B in the coal in described step (1), the water added, bacterium liquid A and step (3) is 100kg:60kg:2ml:1ml.
To take away in embodiment 1-3 detection through the coal sample of desulfurization process, result shows: the coal sample desulfurization degree of embodiment 1 is 85.3%, and the coal sample desulfurization degree of embodiment 2 is 85.5%, and the coal sample desulfurization degree of embodiment 3 is 88.4%, all more than 85%.
The present invention is not restricted to the described embodiments, and without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fall within the scope of protection of the present invention.
Claims (2)
1. a microbial desulfurization method for coal, is characterized in that, comprise the following steps:
(1) put in reactor by coal, add water and bacterium liquid A, mixing, reacts 2-5 hour under room temperature;
(2) at the temperature of 25-30 DEG C, stirring reaction 5-10 hour;
(3) in reactor, bacterium liquid B is added again, at the temperature of 35-45 DEG C, stirring reaction 10-15 hour;
(4) coal in reactor is washed in stirring, filter post-drying and namely obtain desulfurized coal;
The cultural method of the bacterium liquid A of described step (1) is: gather thiobacillus ferrooxidant bacterium liquid, add the substratum of sterilising treatment, at 25-35 DEG C, breed 5-10 days, then carry out the isolation and purification of bacterium, obtaining concentration is 1.9 × 10
7-1.9 × 10
8individual/mL bacterium liquid A;
Bacterium liquid B in described step (3) is made up according to the volume ratio of 2:1 of thiobacillus thiooxidans bacterium liquid and acid heat sulfolobus solfataricus bacterium liquid, and the concentration of described thiobacillus thiooxidans bacterium liquid is 1.5 × 10
5-1.5 × 10
6individual/mL, the concentration of described acid heat sulfolobus solfataricus bacterium liquid is 2.5 × 10
5-2.5 × 10
6individual/mL;
The usage ratio of the bacterium liquid B in the coal in described step (1), the water added, bacterium liquid A and step (3) is 100kg:60kg:2ml:1ml.
2. the microbial desulfurization method of coal according to claim 1, is characterized in that: in the cultural method of described bacterium liquid A, described substratum is made up of by weight following raw material: (NH
4)
2hPO
33 parts, KCl0.2 part, MgSO
47H
2o0.6 part, Fe
2(SO
4)
37H
2o45 part, distilled water 1000 parts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510834389.4A CN105505512A (en) | 2015-11-25 | 2015-11-25 | Microbial desulfurization method for coal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510834389.4A CN105505512A (en) | 2015-11-25 | 2015-11-25 | Microbial desulfurization method for coal |
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| Publication Number | Publication Date |
|---|---|
| CN105505512A true CN105505512A (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510834389.4A Pending CN105505512A (en) | 2015-11-25 | 2015-11-25 | Microbial desulfurization method for coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112592748A (en) * | 2020-11-25 | 2021-04-02 | 辽宁工程技术大学 | Device for removing sulfur in coal by microorganisms |
Citations (4)
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|---|---|---|---|---|
| CN102260568A (en) * | 2010-05-25 | 2011-11-30 | 上海彤微环保科技有限公司 | Combined microbial desulfurization method and process of coal |
| CN102583930A (en) * | 2012-03-17 | 2012-07-18 | 山东民和生物科技有限公司 | Livestock excrement biogas generation method and livestock excrement biogas generation system |
| CN103706460A (en) * | 2013-12-11 | 2014-04-09 | 中国铝业股份有限公司 | Bauxite desulphurization method and device |
| CN103937576A (en) * | 2014-05-02 | 2014-07-23 | 中南大学 | Efficient biological desulfurization method for coal |
-
2015
- 2015-11-25 CN CN201510834389.4A patent/CN105505512A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260568A (en) * | 2010-05-25 | 2011-11-30 | 上海彤微环保科技有限公司 | Combined microbial desulfurization method and process of coal |
| CN102583930A (en) * | 2012-03-17 | 2012-07-18 | 山东民和生物科技有限公司 | Livestock excrement biogas generation method and livestock excrement biogas generation system |
| CN103706460A (en) * | 2013-12-11 | 2014-04-09 | 中国铝业股份有限公司 | Bauxite desulphurization method and device |
| CN103937576A (en) * | 2014-05-02 | 2014-07-23 | 中南大学 | Efficient biological desulfurization method for coal |
Non-Patent Citations (2)
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|---|
| 毕银丽等: "《微生物对煤系固体废弃物资源化利用技术》", 31 July 2007, 煤炭工业出版社 * |
| 池振明: "《微生物生态学》", 30 June 1999, 山东大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112592748A (en) * | 2020-11-25 | 2021-04-02 | 辽宁工程技术大学 | Device for removing sulfur in coal by microorganisms |
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Application publication date: 20160420 |