CN105400560A - Biological desulfurization method - Google Patents
Biological desulfurization method Download PDFInfo
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- CN105400560A CN105400560A CN201510833008.0A CN201510833008A CN105400560A CN 105400560 A CN105400560 A CN 105400560A CN 201510833008 A CN201510833008 A CN 201510833008A CN 105400560 A CN105400560 A CN 105400560A
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- Prior art keywords
- bacterium liquid
- coal
- temperature
- reactor
- biological desulfurization
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 39
- 230000023556 desulfurization Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 239000003245 coal Substances 0.000 claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 241000894006 Bacteria Species 0.000 claims description 50
- 241000605272 Acidithiobacillus thiooxidans Species 0.000 claims description 5
- 241000605118 Thiobacillus Species 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 230000001954 sterilising effect Effects 0.000 claims description 5
- 230000006378 damage Effects 0.000 abstract description 3
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 abstract 2
- 238000001914 filtration Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007483 microbial process Effects 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 3
- 229910052683 pyrite Inorganic materials 0.000 description 3
- 239000011028 pyrite Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 125000001741 organic sulfur group Chemical group 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002068 microbial inoculum Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a biological desulfurization method. The biological desulfurization method comprises the following steps: (1) putting coal into a reaction kettle, adding water and a thiobacillus fer-rooxidans liquid, uniformly mixing, and reacting for 1-5 hours at room temperature; (2) stirring for reaction for 1-5 hours at the temperature of 28-30 DEG C; (3) adding the thiobacillus fer-rooxidans liquid in the reaction kettle again, and stirring for reaction for 10-15 hours at the temperature of 35-40 DEG C; (4) washing coal in the reaction kettle during stirring, filtering, and drying to obtain desulfurized coal. The biological desulfurization method is low in requirement for equipment, free of damage to coal structure, short in desulfurization time, high in efficiency and conducive to ecological environment protection, and has an excellent market prospect.
Description
Technical field
The invention belongs to coal processing technique field, be specifically related to a kind of biological desulfurization method.
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 biological desulfurization method, 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 biological desulfurization method, comprises the following steps:
(1) put in reactor by coal, add water and bacterium liquid A, mixing, reacts 1-5 hour under room temperature;
(2) at the temperature of 28-30 DEG C, stirring reaction 1-5 hour;
(3) in reactor, bacterium liquid B is added again, at the temperature of 35-40 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 5-15 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 thiobacillus thiooxidans bacterium liquid, and concentration is 1.5 × 10
5-1.5 × 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:50kg:1ml: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. biological 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, decrease 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. biological 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 kind of biological desulfurization method, comprises the following steps:
(1) coal is put in reactor, add water and bacterium liquid A, mixing, react 1 hour under room temperature;
(2) at the temperature of 28 DEG C, stirring reaction 1 hour;
(3) in reactor, bacterium liquid B is added again, at the temperature of 35 DEG C, stirring reaction 15 hours;
(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, breed 15 days at 35 DEG C, then carry out the isolation and purification of bacterium, obtaining concentration is 1.9 × 10
7individual/mL bacterium liquid A;
Bacterium liquid B in described step (3) is thiobacillus thiooxidans bacterium liquid, and concentration is 1.5 × 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:50kg:1ml: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.
Embodiment 2
A kind of biological desulfurization method, 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 5 hours;
(3) in reactor, bacterium liquid B is added again, at the temperature of 40 DEG C, stirring reaction 10 hours;
(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, breed 15 days at 25 DEG C, then carry out the isolation and purification of bacterium, obtaining concentration is 9 × 10
8individual/mL bacterium liquid A;
Bacterium liquid B in described step (3) is thiobacillus thiooxidans bacterium liquid, and concentration is 1.5 × 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:50kg:1ml: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.
Embodiment 3
A kind of biological desulfurization method, 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 3 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 cultural method of the bacterium liquid A of described step (1) is: gather thiobacillus ferrooxidant bacterium liquid, add the substratum of sterilising treatment, breed 10 days at 28 DEG C, then carry out the isolation and purification of bacterium, obtaining concentration is 1.9 × 10
8individual/mL bacterium liquid A;
Bacterium liquid B in described step (3) is thiobacillus thiooxidans bacterium liquid, and concentration is 1.5 × 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:50kg:1ml: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.
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 85.6%, and the coal sample desulfurization degree of embodiment 2 is 86.1%, and the coal sample desulfurization degree of embodiment 3 is 87.4%, 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 biological desulfurization method, is characterized in that, comprises the following steps:
(1) put in reactor by coal, add water and bacterium liquid A, mixing, reacts 1-5 hour under room temperature;
(2) at the temperature of 28-30 DEG C, stirring reaction 1-5 hour;
(3) in reactor, bacterium liquid B is added again, at the temperature of 35-40 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 5-15 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 thiobacillus thiooxidans bacterium liquid, and concentration is 1.5 × 10
5-1.5 × 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:50kg:1ml:1ml.
2. biological desulfurization method 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510833008.0A CN105400560A (en) | 2015-11-25 | 2015-11-25 | Biological desulfurization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510833008.0A CN105400560A (en) | 2015-11-25 | 2015-11-25 | Biological desulfurization method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105400560A true CN105400560A (en) | 2016-03-16 |
Family
ID=55466328
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|---|---|---|---|
| CN201510833008.0A Pending CN105400560A (en) | 2015-11-25 | 2015-11-25 | Biological desulfurization method |
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| Country | Link |
|---|---|
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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 |
-
2015
- 2015-11-25 CN CN201510833008.0A patent/CN105400560A/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 (1)
| Title |
|---|
| 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 * |
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Application publication date: 20160316 |
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