CN114044494B - System and method for improving sulfur content in biological sulfur particles - Google Patents
System and method for improving sulfur content in biological sulfur particles Download PDFInfo
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- CN114044494B CN114044494B CN202111269419.3A CN202111269419A CN114044494B CN 114044494 B CN114044494 B CN 114044494B CN 202111269419 A CN202111269419 A CN 202111269419A CN 114044494 B CN114044494 B CN 114044494B
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 324
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 309
- 239000011593 sulfur Substances 0.000 title claims abstract description 309
- 239000002245 particle Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004062 sedimentation Methods 0.000 claims abstract description 60
- 238000003756 stirring Methods 0.000 claims abstract description 37
- 238000004140 cleaning Methods 0.000 claims abstract description 27
- 238000000926 separation method Methods 0.000 claims abstract description 26
- 241000206596 Halomonas Species 0.000 claims abstract description 8
- 238000005273 aeration Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 14
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- 239000001301 oxygen Substances 0.000 claims description 14
- 239000012266 salt solution Substances 0.000 claims description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- 238000006477 desulfuration reaction Methods 0.000 claims description 12
- 230000023556 desulfurization Effects 0.000 claims description 12
- 239000010865 sewage Substances 0.000 claims description 12
- 244000005700 microbiome Species 0.000 claims description 7
- 229910004861 K2 HPO4 Inorganic materials 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 6
- 241001148475 Halomonas halophila Species 0.000 claims description 4
- 241001049245 Halomonas shengliensis Species 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000003321 amplification Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000018044 dehydration Effects 0.000 abstract description 2
- 238000006297 dehydration reaction Methods 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 208000005156 Dehydration Diseases 0.000 abstract 1
- 239000005864 Sulphur Substances 0.000 description 13
- 239000007787 solid Substances 0.000 description 12
- 230000006872 improvement Effects 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 239000008399 tap water Substances 0.000 description 8
- 235000020679 tap water Nutrition 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000011081 inoculation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 150000004676 glycans Chemical class 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229920001282 polysaccharide Polymers 0.000 description 3
- 239000005017 polysaccharide Substances 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/0232—Purification, e.g. degassing
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a system and a method for improving sulfur content in biological sulfur, comprising a biological sulfur separation unit, a first biological sulfur sedimentation unit, a biological sulfur treatment unit, a second biological sulfur sedimentation unit, a biological sulfur cleaning unit and a third biological sulfur sedimentation unit; the biological sulfur solution enters a biological sulfur separation unit, and enters a first biological sulfur sedimentation unit after being stirred; the settled biological sulfur enters a biological sulfur treatment unit, and under the condition of stirring aeration, the halomonas is degraded and organic matters on sulfur particles are utilized, and then enters a second biological sulfur settling unit; the sulfur particles enter a third biological sulfur sedimentation unit after passing through a biological cleaning unit, and finally are subjected to centrifugal dehydration treatment, so that high-purity sulfur particles are obtained, the content of sulfur elements can reach more than 99 percent, the system is simple in structure, convenient to process and beneficial to amplification, high temperature is not needed in operation, and the comprehensive treatment cost is low, so that the system and the method for purifying the biological sulfur particles are high-efficiency and low-cost.
Description
Technical Field
The invention belongs to the field of environmental engineering, and particularly relates to a system and a method for improving sulfur content in biological sulfur particles.
Background
Hydrogen sulfide is a toxic gas with colorless and odorous egg smell, and often exists in natural gas, biogas, refinery gas and the like. Hydrogen sulfide not only has strong corrosion effect on conveying pipelines and equipment, but also generates sulfur dioxide as a combustion product, which is also an important cause for generating acid rain and haze. In recent years, with the increasingly strict environmental protection emission requirements of China, effective desulfurization treatment on hydrogen sulfide-containing gas has become increasingly important. Compared with the traditional physical and chemical methods, the biological desulfurization technology has the advantages of mild conditions, no secondary pollution, no blockage of the system and the like. The biological desulfurization technology can quickly absorb hydrogen sulfide in gas at normal temperature and normal pressure, oxidize the hydrogen sulfide to generate elemental sulfur under the action of microorganisms, and discharge the elemental sulfur from the system in the form of biological sulfur, thereby achieving the purpose of desulfurization.
With the wide application of biological desulfurization technology, the yield of biological sulfur is increased year by year. Searching for a utilization and recycling method of biological sulfur is a key for controlling sulfur pollution and realizing sulfur circulation. The biological sulfur particles generated in the biological desulfurization process have good hydrophilicity, and can be used as raw materials in industries such as pesticide, mining and the like. However, due to the limited scale of such applications, it is difficult to digest large amounts of biological sulfur. The method for preparing sulfuric acid from biological sulfur and entering an industrial sulfur circulation system is a new idea for recycling sulfur resources. The purity of sulfur used for preparing sulfuric acid is required to be more than 99%, while the content of sulfur element is generally lower than 90% due to the existence of organic outer film and other components, so that the direct production of sulfuric acid is difficult. Therefore, purification of biological sulfur is necessary. At present, researchers adopt a method of melting biological sulfur particles at high temperature to increase the content of sulfur element, the method needs high-temperature treatment, and a large amount of sulfur-containing waste gas can be generated. The method provides a system and a method for improving the sulfur content in the biological sulfur particles, and provides technical support for the biological sulfur to enter an industrial sulfur circulation system.
Disclosure of Invention
The invention provides a system and a method for improving the sulfur content in biological sulfur particles, which are used for solving the problems that the content of sulfur element in biological sulfur produced in the existing biological desulfurization technology is low and the purity of sulfuric acid cannot be achieved.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
The invention provides a system for improving sulfur content in biological sulfur particles, which comprises a biological sulfur separation unit, a first biological sulfur sedimentation unit, a biological sulfur treatment unit, a second biological sulfur sedimentation unit, a biological sulfur cleaning unit and a third biological sulfur sedimentation unit;
the biological sulfur separation unit is a cylindrical reactor and is provided with a water inlet, a feed inlet, a discharge outlet and a sewage outlet; the biological sulfur separation unit is provided with a stirring device;
The first biological sulfur sedimentation unit is a cylindrical reactor and is provided with a feed inlet, a discharge outlet and a water outlet; the bottom of the biological sulfur sedimentation unit is conical, and the discharge port is positioned at the bottom of the conical bottom; the second biological sulfur sedimentation unit and the third biological sulfur sedimentation unit have the same structure as the first biological sulfur sedimentation unit;
The biological sulfur treatment unit is a cylindrical reactor and is provided with a liquid inlet, a feed inlet, a discharge outlet, a sewage outlet and a stirring device; an aeration device is arranged at the bottom of the biological sulfur treatment unit, and a dissolved oxygen detector, a pH detector and a temperature detector are arranged in the biological sulfur treatment unit;
the biological sulfur cleaning unit is a cylindrical reactor and is provided with a water inlet, a feed inlet, a discharge outlet and a sewage outlet; the biological sulfur cleaning unit is provided with a stirring device;
All the units are connected through pipelines and are provided with valve control; wherein the discharge port of the biological sulfur separation unit is connected with the feed port of the first biological sulfur sedimentation unit, the discharge port of the first biological sulfur sedimentation unit is connected with the feed port of the biological sulfur treatment unit, the discharge port of the biological sulfur treatment unit is connected with the feed port of the second biological sulfur sedimentation unit, the discharge port of the second biological sulfur sedimentation unit is connected with the feed port of the biological sulfur cleaning unit, the discharge port of the biological sulfur cleaning unit is connected with the feed port of the third biological sulfur sedimentation unit, the biological sulfur is discharged from the discharge port of the third biological sulfur sedimentation unit, the discharge port of the third biological sulfur sedimentation unit is connected with a centrifuge, and high-purity sulfur particles are obtained after dehydration.
The invention also provides a method for improving the sulfur content in the biological sulfur particles, which comprises the following steps:
(1) Adding the biological sulfur solution obtained by the biological desulfurization process into a biological sulfur separation unit, stirring, and then entering a first biological sulfur sedimentation unit;
(2) The biological sulfur solution obtained in the step (1) enters a biological sulfur treatment unit, a salt solution is added, and the biological sulfur solution enters a second biological sulfur sedimentation unit after stirring and aeration treatment;
(3) And (3) enabling the biological sulfur solution obtained in the step (2) to enter a biological sulfur cleaning unit, stirring the biological sulfur solution, and then enabling the biological sulfur solution to enter a third biological sulfur sedimentation unit, and centrifugally dehydrating the settled biological sulfur solution by a centrifugal machine to obtain biological sulfur particles with the sulfur content of more than 99%.
The biological sulfur separation unit separates sulfur oxidizing microorganisms remained on biological sulfur particles in a stirring manner, the biological sulfur particles enter the biological sulfur treatment unit after gravity sedimentation, organic matters in the biological sulfur particles are degraded through the action of halomonas, the content of sulfur elements in the biological sulfur particles is improved, the biological sulfur particles obtained through sedimentation are stirred and cleaned to remove halomonas and salt doped in the biological sulfur particles, and finally the sulfur particles with higher purity are obtained through sedimentation unit and centrifugal treatment.
As an improvement of the present invention, the step (1) further includes the steps of: adding water from the water inlet of the biological sulfur separation unit until the content of the biological sulfur is 1wt.% to 2 wt wt.%.
As an improvement of the invention, in the step (2), the pH value of the salt solution is 7.0-8.0, the concentration of the salt solution is 1.0-1.5mol/L, and the mass ratio of the biological sulfur obtained in the step (1) to the salt solution is 0.05-0.1:1.
As an improvement of the invention, the salt solution comprises 0-100 g/L NaCl, 0.1-1.0 g/L NH 4Cl、0.1-1.0 g/L KNO3、0.5-5.0 g/L K2 HPO4 and 0.05-0.3 g/L MgCl 2.
As an improvement of the invention, in the step (2), a microorganism is also added into the biological sulfur treatment unit, wherein the microorganism is halomonas; preferably, the cultured halomonas is added in an inoculum size of 5% -10% of the total volume.
As an improvement of the invention, the halomonas is one or more of Halomonas halophila (CGMCC 1.9002)), halomonas shengliensis (CGMCC 1.7432).
As an improvement of the invention, in the step (2), the temperature of the biological sulfur treatment unit is 25-35 ℃ and the dissolved oxygen is 0.5-3.5mg/L; preferably, the temperature of the biological sulfur treatment unit is 30-32 ℃ and the dissolved oxygen is 2.5-3.0mg/L.
As an improvement of the invention, in the step (2), the stirring speed in the step (1) is 200-1200rpm for 20-40 minutes, and the stirring speed in the step (2) is 200-400rpm for 24-72 hours; the stirring speed in the step (3) is 200-1200rpm, and the stirring time is 20-40 minutes.
As an improvement of the present invention, the step (3) further includes the steps of: adding water from the water inlet of the biological sulfur cleaning unit until the content of the biological sulfur is 1wt.% to 2 wt wt.%.
The beneficial effects of the invention are as follows:
(1) The invention utilizes the degradation and utilization of microorganisms to organic matters, and improves the content of sulfur element in biological sulfur particles to more than 99 percent.
(2) The system has the advantages of simple structure, convenient processing, easy amplification, no need of high temperature in operation and low comprehensive treatment cost.
Drawings
FIG. 1 is a schematic diagram of a system for increasing sulfur content in biological sulfur particles according to the present invention;
FIG. 2 is a chart showing Fourier spectrum analysis of sulfur particles before and after treatment in example 2 of the present invention; wherein (a) is sulfur particles before treatment and (b) is sulfur particles after treatment;
reference numerals illustrate:
1. a biological sulfur separation unit; 101. a water inlet; 102. a feed inlet; 103. a sewage outlet; 104. a discharge port; 2. a first biological sulfur sedimentation unit; 201. a feed inlet; 202. a water outlet; 203. a discharge port; 3. a biological sulfur treatment unit; 301. a liquid inlet; 302. a feed inlet; 303. a sewage outlet; 304. a discharge port; 305. a pH detector; 306. a dissolved oxygen detector; 307. a temperature detector; 4. a second biological sulfur sedimentation unit; 401. a feed inlet; 402. a water outlet; 403. a discharge port; 5. a biological sulfur cleaning unit; 501. a water inlet; 502. a feed inlet; 503. a sewage outlet; 504. a discharge port; 6. a third biological sulfur sedimentation unit; 601. a feed inlet; 602. a water outlet; 603. a discharge port; 7. and (5) a centrifugal machine.
Detailed Description
The present invention is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the invention and not limiting the scope of the invention.
Example 1
As shown in fig. 1, a system for increasing sulfur content in biological sulfur particles comprises a biological sulfur separation unit 1, a first biological sulfur sedimentation unit 2, a biological sulfur treatment unit 3, a second biological sulfur sedimentation unit 4, a biological sulfur cleaning unit 5 and a third biological sulfur sedimentation unit 6;
the biological sulfur separation unit 1 is a cylindrical reactor and is provided with a water inlet 101, a feed inlet 102, a discharge outlet 104 and a sewage outlet 103; the biological sulfur separation unit 1 is provided with a stirring device;
the first biological sulfur sedimentation unit 2 is a cylindrical reactor and is provided with a feed inlet 201, a discharge outlet 203 and a water outlet 202; the bottom of the biological sulfur sedimentation unit 2 is conical, and the discharge port 203 is positioned at the bottom of the conical bottom; the second biological sulfur sedimentation unit 4 and the third biological sulfur sedimentation unit 6 have the same structure as the first biological sulfur sedimentation unit 2;
The biological sulfur treatment unit 3 is a cylindrical reactor and is provided with a liquid inlet 301, a material inlet 302, a material outlet 304, a sewage outlet 303 and a stirring device; an aeration device is arranged at the bottom of the biological sulfur treatment unit 3, and an oxygen dissolving detector 306, a pH detector 305 and a temperature detector 307 are arranged in the biological sulfur treatment unit 3;
the biological sulfur cleaning unit 5 is a cylindrical reactor and is provided with a water inlet 501, a feed inlet 502, a discharge outlet 504 and a sewage outlet 503; the biological sulfur cleaning unit 5 is provided with a stirring device;
All the units are connected through pipelines and are provided with valve control; wherein, the discharge gate 104 of biological sulphur separation unit links to each other with the feed inlet 201 of first biological sulphur sedimentation unit, and the discharge gate 203 of first biological sulphur sedimentation unit links to each other with the feed inlet 302 of biological sulphur treatment unit, and biological sulphur treatment unit discharge gate 304 links to each other with the feed inlet 401 of second biological sulphur sedimentation unit, and the discharge gate 403 of second biological sulphur sedimentation unit links to each other with the feed inlet 502 of biological sulphur cleaning unit, and biological sulphur cleaning unit discharge gate 504 links to each other with the feed inlet 601 of third biological sulphur sedimentation unit, and centrifuge 7 is connected to the discharge gate 603 of third biological sulphur sedimentation unit.
Purification of biological sulphur obtained for a weakly basic biological sulphur removal system:
(1) The sulfur element content in the biological sulfur raw material is 85%, and other elements including carbon, nitrogen, oxygen, hydrogen and the like are analyzed to be protein or polysaccharide substances, and exist in the form of sulfur particle outer membranes. Adding a biological sulfur solution with the solid content of 10% into a biological sulfur separation unit 1, adding tap water to reduce the solid content to 2%, stirring at 900rpm, and after running for 20 minutes, adding the biological sulfur solution into a first biological sulfur sedimentation unit 2, and settling for 2 hours;
(2) Introducing the settled sulfur solution in the step (1) into a biological sulfur treatment unit 3, adding a salt solution (50 g/L NaCl, 0.5 g/L NH 4Cl、1.0 g/L KNO3、0.5 g/L K2 HPO4 and 0.3 g/L MgCl 2) to ensure that the content of sulfur particles in the solution is 5%, adding cultured halomonas Halomonas halophila (CGMCC 1.9002) according to the inoculation amount of 5% of the total volume, blowing air, controlling dissolved oxygen at 2.5mg/L, stirring at 300rpm, reacting for 48 hours, adding the biological sulfur solution into a second biological sulfur settlement unit 4, and settling for 2 hours;
(3) The settled sulfur solution in the step (2) enters a biological sulfur cleaning unit 5, tap water is added to reduce the solid content to 2%, the stirring speed is 900rpm, after the operation time is 20 minutes, the biological sulfur solution is added into a third biological sulfur settling unit 6, and the settlement is carried out for 2 hours; and (3) treating the sulfur particles settled at the bottom of the third biological sulfur settling unit 6 by a centrifugal machine 7 to obtain sulfur particles with the purity of 99.5%.
Example 2
A system for increasing the sulfur content of biological sulfur particles was the same as in example 1.
Purification of biological sulfur obtained for high-salt high-alkali biological desulfurization system:
(1) The sulfur element content in the biological sulfur raw material is 90%, and other elements including carbon, nitrogen, oxygen, hydrogen and the like are analyzed to be protein or polysaccharide substances and exist in the form of sulfur particle outer membranes. Adding a biological sulfur solution with the solid content of 10% into a biological sulfur separation unit 1, adding tap water to reduce the solid content to 1%, stirring at 800rpm, and after running for 30 minutes, adding the biological sulfur solution into a first biological sulfur sedimentation unit 2, and settling for 2 hours;
(2) Introducing the settled sulfur solution in the step (1) into a biological sulfur treatment unit 3, adding a salt solution (100 g/L NaCl, 1.0 g/L NH 4Cl、1.0 g/L KNO3、0.5 g/L K2 HPO4 and 0.3 g/L MgCl 2) to ensure that the content of sulfur particles in the solution is 10%, adding cultured halomonas Halomonas shengliensis (CGMCC 1.7432) according to the inoculation amount of 10% of the total volume, blowing air, controlling dissolved oxygen at 2.5mg/L, stirring at 400rpm, reacting for 30 hours, adding the biological sulfur solution into a second biological sulfur settlement unit 4, and settling for 2 hours;
(3) The settled sulfur solution in the step (1) enters a biological sulfur cleaning unit 5, tap water is added to reduce the solid content to 1%, the stirring speed is 900rpm, after the operation time is 30 minutes, the biological sulfur solution is added into a third biological sulfur settling unit 6, and the settlement is carried out for 2 hours; and (3) treating the sulfur particles settled at the bottom of the third biological sulfur settling unit 6 by a centrifugal machine 7 to obtain sulfur particles with the purity of 99.8%.
The result of fourier spectrum analysis of the sulfur particles before and after the treatment is shown in fig. 2, the characteristic peaks representing the organic matters in the sulfur particles are obviously reduced, which indicates that the content of sulfur element in the sulfur particles is improved.
Example 3
A system for increasing the sulfur content of biological sulfur particles was the same as in example 1.
Purification of biological sulfur obtained for high-salt high-alkali biological desulfurization system:
(1) The content of sulfur element in the biological sulfur raw material is 90 percent. Adding a biological sulfur solution with the solid content of 10% into a biological sulfur separation unit 1, adding tap water to reduce the solid content to 1.5%, stirring at 800rpm, and after running for 20 minutes, adding the biological sulfur solution into a first biological sulfur sedimentation unit 2, and settling for 2 hours;
(2) Introducing the settled sulfur solution in the step (1) into a biological sulfur treatment unit 3, adding a salt solution (80 g/L NaCl, 1.0 g/L NH 4Cl、0.5 g/L KNO3、0.5 g/L K2 HPO4 and 0.5 g/L MgCl 2) to ensure that the content of sulfur particles in the solution is 7%, adding cultured halomonas Halomonas shengliensis (CGMCC 1.7432) according to the inoculation amount of 8% of the total volume, blowing air, controlling dissolved oxygen at 2.7mg/L, stirring at 300rpm, reacting for 30 hours, adding the biological sulfur solution into a second biological sulfur settlement unit 4, and settling for 2 hours;
(3) The settled sulfur solution in the step (1) enters a biological sulfur cleaning unit 5, tap water is added to reduce the solid content to 1%, the stirring speed is 900rpm, after the operation time is 30 minutes, the biological sulfur solution is added into a third biological sulfur settling unit 6, and the settlement is carried out for 1.5 hours; and (3) treating the sulfur particles settled at the bottom of the third biological sulfur settling unit 6 by a centrifugal machine 7 to obtain sulfur particles with the purity of 99.5%.
Example 4
A system for increasing the sulfur content of biological sulfur particles was the same as in example 1.
Purification of biological sulfur obtained for high-salt high-alkali biological desulfurization system:
(1) The sulfur element content in the biological sulfur raw material is 90%, and other elements including carbon, nitrogen, oxygen, hydrogen and the like are analyzed to be protein or polysaccharide substances and exist in the form of sulfur particle outer membranes. Adding a biological sulfur solution with the solid content of 10% into a biological sulfur separation unit 1, adding tap water to reduce the solid content to 1%, stirring at 500rpm, and after 40 minutes of operation time, adding the biological sulfur solution into a first biological sulfur sedimentation unit 2, and settling for 2 hours;
(2) Introducing the settled sulfur solution in the step (1) into a biological sulfur treatment unit 3, adding a salt solution (50 g/L NaCl, 0.5 g/L NH 4Cl、1.0 g/L KNO3、0.7g/L K2 HPO4 and 0.3 g/L MgCl 2) to ensure that the content of sulfur particles in the solution is 10%, adding cultured halomonas Halomonas halophila (CGMCC 1.9002) according to the inoculation amount of 10% of the total volume, blowing air, controlling dissolved oxygen at 3.0mg/L, stirring at 300rpm, reacting for 40 hours, adding the biological sulfur solution into a second biological sulfur settlement unit 4, and settling for 2 hours;
(3) The settled sulfur solution in the step (1) enters a biological sulfur cleaning unit 5, tap water is added to reduce the solid content to 1%, the stirring speed is 900rpm, after the operation time is 20 minutes, the biological sulfur solution is added into a third biological sulfur settling unit 6, and the settlement is carried out for 2 hours; and (3) treating the sulfur particles settled at the bottom of the third biological sulfur settling unit 6 by a centrifugal machine 7 to obtain sulfur particles with the purity of 99.6%.
It should be noted that the foregoing merely illustrates the technical idea of the present invention and is not intended to limit the scope of the present invention, and that a person skilled in the art may make several improvements and modifications without departing from the principles of the present invention, which fall within the scope of the claims of the present invention.
Claims (8)
1. The system for improving the sulfur content in the biological sulfur particles is characterized by comprising a biological sulfur separation unit, a first biological sulfur sedimentation unit, a biological sulfur treatment unit, a second biological sulfur sedimentation unit, a biological sulfur cleaning unit and a third biological sulfur sedimentation unit;
the biological sulfur separation unit is a cylindrical reactor and is provided with a water inlet, a feed inlet, a discharge outlet and a sewage outlet; the biological sulfur separation unit is provided with a stirring device;
the first biological sulfur sedimentation unit is a cylindrical reactor and is provided with a feed inlet, a discharge outlet and a water outlet; the bottom of the biological sulfur sedimentation unit is conical, and the discharge port is positioned at the bottom of the cone; the second biological sulfur sedimentation unit and the third biological sulfur sedimentation unit have the same structure as the first biological sulfur sedimentation unit;
The biological sulfur treatment unit is a cylindrical reactor and is provided with a liquid inlet, a feed inlet, a discharge outlet, a sewage outlet and a stirring device; an aeration device is arranged at the bottom of the biological sulfur treatment unit, and a dissolved oxygen detector, a pH detector and a temperature detector are arranged in the biological sulfur treatment unit;
the biological sulfur cleaning unit is a cylindrical reactor and is provided with a water inlet, a feed inlet, a discharge outlet and a sewage outlet; the biological sulfur cleaning unit is provided with a stirring device;
All the units are connected through pipelines and are provided with valve control; the device comprises a biological sulfur separation unit, a biological sulfur treatment unit, a biological sulfur cleaning unit, a centrifuge, a biological sulfur sedimentation unit, a biological sulfur treatment unit, a biological sulfur cleaning unit, a biological sulfur separation unit, a biological sulfur cleaning unit and a centrifuge, wherein the discharge port of the biological sulfur separation unit is connected with the feed port of the first biological sulfur sedimentation unit;
microorganism is added into the biological sulfur treatment unit, the microorganism is halomonas, and the halomonas is one or more of Halomonas halophila and Halomonas shengliensis.
2. A method for increasing the sulfur content of biological sulfur particles using the system for increasing sulfur content of biological sulfur particles according to claim 1, comprising the steps of:
(1) Adding the biological sulfur solution obtained by the biological desulfurization process into a biological sulfur separation unit, stirring, and then entering a first biological sulfur sedimentation unit;
(2) The biological sulfur solution obtained in the step (1) enters a biological sulfur treatment unit, a salt solution is added, and the biological sulfur solution enters a second biological sulfur sedimentation unit after stirring and aeration treatment;
(3) And (3) enabling the biological sulfur solution obtained in the step (2) to enter a biological sulfur cleaning unit, stirring the biological sulfur solution, and then enabling the biological sulfur solution to enter a third biological sulfur sedimentation unit, and centrifugally dehydrating the settled biological sulfur solution by a centrifugal machine to obtain biological sulfur particles with the sulfur content of more than 99%.
3. A method for increasing sulfur content in biological sulfur particles according to claim 2, wherein said step (1) further comprises the steps of: adding water from the water inlet of the biological sulfur separation unit until the content of the biological sulfur is 1wt.% to 2 wt wt.%.
4. The method for increasing sulfur content in biological sulfur particles according to claim 2, wherein in the step (2), the pH of the salt solution is 7.0-8.0, the concentration of the salt solution is 1.0-1.5mol/L, and the mass ratio of biological sulfur obtained in the step (1) to the salt solution is 0.05-0.1:1.
5. A method for increasing sulfur content in biological sulfur particles according to claim 3, wherein said salt solution comprises 0-100 g/L NaCl, 0.1-1.0 g/L NH 4Cl、0.1-1.0 g/L KNO3、0.5-5.0 g/L K2 HPO4 and 0.05-0.3 g/L MgCl 2.
6. The method for increasing sulfur content in biological sulfur particles according to claim 2, wherein in step (2), the temperature of the biological sulfur treatment unit is 25-35 ℃ and the dissolved oxygen is 0.5-3.5mg/L.
7. The method for increasing sulfur content in biological sulfur particles according to claim 2, wherein the stirring speed in the step (1) is 200-1200rpm for 20-40 minutes, and the stirring speed in the step (2) is 200-400rpm for 24-72 hours; the stirring speed in the step (3) is 200-1200rpm, and the stirring time is 20-40 minutes.
8. A method for increasing sulfur content in biological sulfur particles according to claim 2, wherein said step (3) further comprises the steps of: adding water from the water inlet of the biological sulfur cleaning unit until the content of the biological sulfur is 1wt.% to 2 wt wt.%.
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| US10478652B2 (en) * | 2017-12-15 | 2019-11-19 | King Fadh University Of Petroleum And Minerals | Method for biodegrading high molecular weight polycyclic aromatic hydrocarbon pyrenes with halophilic bacteria |
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