CN115520837A - System and method for recovering sulfur from dangerous waste of fireworks and firecrackers - Google Patents
System and method for recovering sulfur from dangerous waste of fireworks and firecrackers Download PDFInfo
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- CN115520837A CN115520837A CN202211192169.2A CN202211192169A CN115520837A CN 115520837 A CN115520837 A CN 115520837A CN 202211192169 A CN202211192169 A CN 202211192169A CN 115520837 A CN115520837 A CN 115520837A
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- sulfur
- water
- carbon disulfide
- reaction kettle
- filter
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 65
- 239000011593 sulfur Substances 0.000 title claims abstract description 65
- 239000002699 waste material Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 24
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 claims abstract description 149
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 238000011084 recovery Methods 0.000 claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 238000004064 recycling Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 46
- 239000005864 Sulphur Substances 0.000 claims description 10
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 239000002920 hazardous waste Substances 0.000 claims description 3
- 238000007602 hot air drying Methods 0.000 claims description 3
- 239000002910 solid waste Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000003721 gunpowder Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 101100314150 Caenorhabditis elegans tank-1 gene Proteins 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- 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
- C01B17/027—Recovery of sulfur from material containing elemental sulfur, e.g. luxmasses or sulfur containing ores; Purification of the recovered sulfur
- C01B17/033—Recovery of sulfur from material containing elemental sulfur, e.g. luxmasses or sulfur containing ores; Purification of the recovered sulfur using a liquid extractant
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a recovery system of sulfur in dangerous waste of fireworks and firecrackers, which comprises a sulfur extraction section and a sulfur filtering section. The invention utilizes the sulfur to dissolve in the carbon disulfide to develop a sulfur extraction recovery system and a method, water is used for covering and maintaining the whole process to ensure that the carbon disulfide can not be volatilized and the safety of the whole operation process is ensured, the waste residue is continuously extracted, the waste residue is separated from the extraction liquid by solid-liquid separation, and the extraction agent is volatilized by pumping negative pressure, and after a series of operation treatment, more than 95 percent of the sulfur in the dangerous waste of the fireworks can be extracted for recycling. The invention also discloses a method for recovering sulfur from the dangerous waste of the fireworks.
Description
Technical Field
The invention relates to the technical field of waste treatment, in particular to a system and a method for recovering sulfur in dangerous waste of fireworks and firecrackers.
Background
In the production process of fireworks and firecrackers, dangerous wastes such as waste white gunpowder, waste black gunpowder and waste firing cable which are discarded, remained and fall off the ground are generated by fireworks and firecrackers production enterprises, according to the investigation, 1.2 million tons of dangerous wastes such as waste white gunpowder, waste black gunpowder and waste firing cable are required to be generated in one year in Hunan province, sulfur accounts for 15-20% (about 2000 tons) of waste white gunpowder, waste black gunpowder and waste firing cable, the melting point of sulfur is low, and the hazardous wastes are required to be treated. At present, a complete system and a complete method are not available for recycling the sulfur in the dangerous waste of the fireworks and the firecrackers, and only one of the sulfur can be poured into a pond to eliminate the explosion danger; however, not only can resources be randomly generated, but also great influence is caused to the environment, hidden danger is left to safety, and even more casualties caused by hydrogen sulfide poisoning are caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a system and a method for recovering sulfur from dangerous waste of fireworks and crackers, which have the advantages of simple process, energy conservation, environmental protection, low operation cost and no emission.
In order to achieve the purpose, one of the adopted technical schemes is as follows: a sulfur recovery system in fireworks and firecrackers hazardous waste comprises a sulfur extraction section and a sulfur filtration section, wherein the sulfur extraction section comprises a first water tank, a first reaction kettle, a first filter, a second reaction kettle, a condenser and a carbon disulfide collecting tank, the upper part of the first reaction kettle is provided with a water inlet, a feed opening, a stirrer and a carbon disulfide inlet, the water outlet of the first water tank is communicated with the water inlet at the upper part of the first reaction kettle, the carbon disulfide collecting tank is communicated with a carbon disulfide inlet pipeline, the outlet of the pipeline extends into the lower part of the first reaction kettle, the discharge opening of the first reaction kettle is communicated with the first filter, a pneumatic diaphragm pump is arranged between the first filter and the second reaction kettle, the second reaction kettle is also provided with a first vacuum pump, a second vacuum pump and a heat conduction oil pump, the second reation kettle passes through second vacuum pump and condenser intercommunication, condenser and carbon disulfide collection tank intercommunication, sulphur filter segment includes second filter and second water pitcher, the feed inlet of second filter and second reation kettle's discharge gate intercommunication, the sulfur slurry pump income feed inlet of second filter after the heat conduction oil pump extracts the second reation kettle, first filter, the second filter all adopts bag filter, the delivery port of second filter sets up two way pipelines and will go out water return reuse, pipeline accessible vacuum pump and first water pitcher intercommunication all the way, two way pipeline accessible water pump and second water pitcher intercommunication, second reation kettle's upper portion filler pipe is through water pump and second water pitcher intercommunication, and still set up the hot-blast pipe valve on the pipeline.
Preferably, a first vacuum meter is arranged on the first filter air outlet pipeline.
Preferably, the surface of the lower part of the second reaction kettle is provided with an annular heating coil, and the heating coil is connected with a heat conduction oil pump.
Preferably, a second vacuum meter is further arranged on the second reaction kettle.
Preferably, set up water feeding pipe on the second reation kettle, return the delivery port intercommunication of reuse wantonly with in the system, like the delivery port of second water pitcher, the carbon disulfide (extractant) that contains the sulphur among the second reation kettle is through taking out the negative pressure, the sulphur is appeared behind the volatile carbon disulfide, open water feeding pipe's valve, add part water (can be recovery reuse water such as sulphur washing water) in the second reation kettle, form the thick liquids after making the sulphur that appears and water mixture, be convenient for go into the feed inlet of second filter through the conduction oil pump.
Preferably, the condenser uses-20 ℃ chilled water for condensation.
Preferably, the vacuum pump adopts a water ring vacuum pump.
Preferably, the carbon disulfide collection tank is further provided with a temperature sensor, and a water outlet is formed to be communicated with the first water tank.
In order to achieve the purpose, the second technical scheme adopted by the invention is as follows: a recovery method of sulfur in dangerous waste of fireworks and firecrackers is completed by the procedures of continuous extraction of dangerous waste of fireworks and firecrackers, solid-liquid separation of waste residue and extraction liquid, and negative-pressure volatilization of an extractant, wherein the extractant adopts carbon disulfide, and comprises the following steps:
1) Sequentially adding water, carbon disulfide and dangerous waste of the fireworks containing sulfur into a reaction kettle, fully stirring to completely dissolve the sulfur into the carbon disulfide, and completely immersing the dangerous waste of the fireworks and the carbon disulfide by the water;
2) Filtering the mixed solid waste liquid in the reaction kettle, and continuously pumping negative pressure to the filtrate to separate out sulfur and carbon disulfide;
3) Condensing and collecting carbon disulfide, returning the collected carbon disulfide to the step 1) for reuse, and returning the separated water to the step 1) for reuse;
4) Continuously pumping negative pressure to the sulfur obtained in the step 2), mixing the separated sulfur and water to prepare slurry, filtering again, washing and drying the sulfur filter residue to obtain recovered sulfur, and recycling the filtered water;
preferably, the carbon disulfide added in the step 1) is 1-5 times of the mass of sulfur in the dangerous waste of the fireworks and firecrackers, and the amount of water is 1-5 times of the sum of the amount of the carbon disulfide and the weight of the dangerous waste of the fireworks and firecrackers.
Preferably, the water in the first reaction kettle is 20-100cm higher than the liquid level of the mixture of the carbon disulfide and the dangerous waste of the fireworks.
Preferably, the negative pressure is controlled between-0.03 and-0.06 MPa.
Preferably, the sulfur drying is hot air drying.
The beneficial effects of the invention are: the recovery system and the recovery method are developed by utilizing the characteristic that the sulfur is dissolved in the carbon disulfide, the whole process is covered and maintained by water, the carbon disulfide is prevented from being volatilized, the safety of the whole operation process is ensured, and more than 95 percent of the sulfur in the dangerous waste of the fireworks and crackers is extracted by continuously pumping negative pressure for recycling.
The system can run efficiently and stably, is a recycling process system for sulfur in the dangerous waste of the non-discharge circulating fireworks and crackers, has good market application prospect, and has certain economic and social benefits.
Drawings
FIG. 1 is a schematic diagram of a sulfur extraction section according to an embodiment of the present invention.
FIG. 2 is a schematic view of a sulfur filter stage according to an embodiment of the present invention.
The system comprises a first water tank-1, a first reaction kettle-2, a first filter-3, a second reaction kettle-4, a condenser-5, a carbon disulfide collecting tank-6, a pneumatic diaphragm pump-7, a heat conducting oil pump-8, a second filter-9, a second water tank-10, a hot blast pipe valve-11, a vacuum gauge-12, an annular heating coil-13, a water ring vacuum pump-14, a temperature sensor-15, a water pump-16, a pressure release valve-17 and a feeding pipe-18.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure are described below clearly and completely. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
In the first embodiment, referring to fig. 1 and 2, the recovery system of sulfur in dangerous waste of fireworks and firecrackers of the present invention comprises a sulfur extraction section and a sulfur filtration section, wherein the sulfur extraction section comprises a first water tank 1, a first reaction kettle 2, a first filter 3, a second reaction kettle 4, a condenser 5 and a carbon disulfide collection tank 6, the upper part of the first reaction kettle is provided with a water inlet, a feed inlet and a carbon disulfide inlet, the first water tank is communicated with a water outlet, the carbon disulfide collection tank is communicated with a carbon disulfide inlet pipeline, an outlet of the pipeline extends into the lower part of the first reaction kettle, a discharge outlet of the first reaction kettle is communicated with the first filter, a pneumatic diaphragm pump 7 is arranged between the first filter and the second reaction kettle, the second reation kettle still is provided with first vacuum pump, second vacuum pump and heat conduction oil pump 8, the second reation kettle passes through second vacuum pump and condenser intercommunication, condenser and carbon disulfide collection tank intercommunication, the sulphur filter stage includes second filter 9 and second water pitcher 10, the feed inlet of second filter and second reation kettle's discharge gate intercommunication, the heat conduction oil pump goes into the feed inlet of second filter with the sulphur pump after the second reation kettle extraction, first filter, the second filter all adopts bag filter, the delivery port of second filter sets up two way pipelines, pipeline of the same kind passes through vacuum pump and first water pitcher intercommunication, water pitcher pipeline of the same kind passes through water pump and second water pitcher intercommunication, second water pump and second water pitcher intercommunication are passed through to the upper portion of second reation kettle, and set up hot-blast pipe valve 11 on the intercommunication pipeline.
The first vacuum gauge 12 is disposed on the first filter outlet conduit of the present embodiment.
The surface of the lower part of the second reaction kettle of the embodiment is provided with an annular heating coil 13, and the heating pipe is connected with a heat-conducting oil pump.
The second reaction kettle of the embodiment is further provided with a second vacuum gauge 14.
The condenser of this example uses chilled water for condensation.
The vacuum pump of the present embodiment employs a water ring vacuum pump 15.
The carbon disulfide collection tank of this embodiment still sets up temperature sensor 16, and sets up the first water pitcher of delivery port intercommunication.
Example two
A method for recovering sulfur in dangerous waste of fireworks and firecrackers adopts the recovery system of the embodiment I, and comprises the following steps:
1) Sequentially adding water, carbon disulfide and dangerous waste of fireworks containing sulfur into a first reaction kettle, fully stirring to completely dissolve the sulfur in the carbon disulfide, and completely immersing the dangerous waste of fireworks and carbon disulfide in the water;
2) Filtering the mixed solid waste liquid in the first reaction kettle, pumping the filtrate into a second reaction kettle through a pneumatic diaphragm, and continuously pumping negative pressure through a water ring vacuum pump to separate sulfur and carbon disulfide;
3) The carbon disulfide is condensed and collected by a water ring vacuum pump air pipe pump through a freezing water condenser at the temperature of-20 ℃, the collected carbon disulfide is layered in a carbon disulfide collecting tank, the collecting tank is also provided with a material supplementing pipe 18 for supplementing the carbon disulfide, the material supplementing pipe extends into the bottom of the tank, the carbon disulfide at the bottom of the tank is returned to the step 1) for reuse, and the upper layer separated water is returned to the step 1) for reuse through a pneumatic diaphragm pump;
4) Adding part of water into the sulfur obtained in the step 2) through a water adding pipeline of a second reaction kettle to form slurry, pumping the slurry out through a heat conduction oil pump, allowing the slurry to enter a second filter for continuously pumping negative pressure, arranging a pressure release valve 17 on the second filter, washing and drying the sulfur filter residue to obtain recovered sulfur, opening the pressure release valve 17, removing a cover plate on the upper part of the filter, and taking out a filter bag to pour the sulfur; the filtered water is reused;
in the embodiment, the carbon disulfide is added in the step 1) and the mass of the carbon disulfide is 1-5 times of that of the sulfur in the dangerous waste of the fireworks and firecrackers, and the amount of the water is 1-5 times of the sum of the amount of the carbon disulfide and the weight of the dangerous waste of the fireworks and firecrackers.
The water in the first reaction kettle of the embodiment is 20-100cm higher than the liquid level of the mixture of the carbon disulfide and the dangerous waste of the fireworks and firecrackers.
The negative pressure of this example is controlled to-0.03 to-0.06 MPa.
The sulfur drying of the embodiment adopts hot air drying, and the temperature of the hot air is controlled to be 40-60 ℃.
The recovery system and the recovery method are developed by utilizing the characteristic that the sulfur is dissolved in the carbon disulfide, the whole process is covered and maintained by water, the carbon disulfide is prevented from being volatilized, the safety of the whole operation process is ensured, and more than 95 percent of the sulfur in the dangerous waste of the fireworks and crackers is extracted by continuously pumping negative pressure for recycling.
The system can run efficiently and stably, is a recycling process system for sulfur in the dangerous waste of the non-discharge circulating fireworks and crackers, and has good market application prospect.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple variations, equivalent substitutions or modifications based on the present invention to achieve substantially the same technical effects are within the scope of the present invention.
Claims (10)
1. The utility model provides a sulphur recovery system in fireworks and firecrackers hazardous waste which characterized in that, includes sulphur extraction section, sulphur filter segment, wherein:
the sulfur extraction section comprises a first water tank, a first reaction kettle, a first filter, a second reaction kettle, a condenser and a carbon disulfide collecting tank, wherein the upper part of the first reaction kettle is provided with a water inlet, a feed port, a stirrer and a carbon disulfide inlet, a water outlet of the first water tank is communicated with the water inlet on the upper part of the first reaction kettle, the carbon disulfide collecting tank is communicated with a carbon disulfide inlet pipeline on the upper part of the first reaction kettle, an outlet of the pipeline extends into the lower part of the first reaction kettle, a discharge port of the first reaction kettle is communicated with the first filter, a pneumatic diaphragm pump is arranged between the first filter and the second reaction kettle, the second reaction kettle is also provided with a first vacuum pump, a second vacuum pump and a heat conduction oil pump, the second reaction kettle is communicated with the condenser through the second vacuum pump, and the condenser is communicated with the carbon disulfide collecting tank;
the sulfur filtering section comprises a second filter and a second water tank, a feeding hole of the second filter is communicated with a discharging hole of the second reaction kettle, the heat conduction oil pump pumps sulfur slurry of the second reaction kettle into the feeding hole of the second filter, the first filter and the second filter both adopt bag filters, a water outlet of the second filter is provided with two pipelines to return water for reuse, and the second filter is also provided with a hot air pipe.
2. A recovery system in accordance with claim 1, wherein a first vacuum gauge is provided on said first filter outlet conduit.
3. The recycling system according to claim 2, wherein an annular heating coil is arranged on the lower surface of the second reaction kettle, the heating coil is connected with a heat transfer oil pump, and a second vacuum meter is further arranged on the second reaction kettle.
4. A recovery system as claimed in claim 3, wherein the condenser uses-20 ℃ chilled water for condensation.
5. The recycling system according to claim 4, wherein the vacuum pump is a water ring vacuum pump.
6. A recycling system according to claim 5, characterized in that the second reaction vessel is provided with a water feeding pipeline which is communicated with any water outlet for returning and reusing in the system.
7. A recovery system as claimed in claim 6, wherein the carbon disulphide collection tank is further provided with a temperature sensor and a water outlet in communication with the first water tank.
8. The method for recovering sulfur in dangerous waste of fireworks and crackers by using the recovery system of any one of claims 1-7 is characterized by comprising the following steps of continuously extracting the dangerous waste of fireworks and crackers, performing solid-liquid separation on waste residues and extraction liquid, and volatilizing an extractant by pumping negative pressure, wherein the extractant is carbon disulfide:
1) Sequentially adding water, carbon disulfide and dangerous waste of fireworks containing sulfur into a reaction kettle, fully stirring to completely dissolve the sulfur in the carbon disulfide, and completely immersing the dangerous waste of fireworks and carbon disulfide in the water;
2) Filtering the mixed solid waste liquid in the reaction kettle, and continuously pumping negative pressure to the filtrate to separate sulfur and carbon disulfide;
3) Condensing and collecting carbon disulfide, returning the collected carbon disulfide to the step 1) for reuse, and reusing the separated water;
4) Continuously pumping negative pressure to the sulfur obtained in the step 2), mixing the separated sulfur and water to prepare slurry, filtering again, washing and drying the sulfur filter residue to obtain recovered sulfur, and recycling the filtered water.
9. The recycling method according to claim 8, wherein the carbon disulfide added in the step 1) is 1-5 times of the mass of the sulfur in the dangerous waste of the fireworks and firecrackers, and the amount of the water is 1-5 times of the sum of the amount of the carbon disulfide and the weight of the dangerous waste of the fireworks and firecrackers; the water in the first reaction kettle is 20-100cm higher than the liquid level of the mixture of the carbon disulfide and the dangerous waste of the fireworks and firecrackers.
10. The recovery method according to claim 9, wherein the negative pressure is controlled to be-0.03 to-0.06 MPa; the sulfur drying adopts hot air drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211192169.2A CN115520837B (en) | 2022-09-28 | 2022-09-28 | System and method for recycling sulfur in dangerous waste of fireworks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211192169.2A CN115520837B (en) | 2022-09-28 | 2022-09-28 | System and method for recycling sulfur in dangerous waste of fireworks |
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| Publication Number | Publication Date |
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| CN115520837A true CN115520837A (en) | 2022-12-27 |
| CN115520837B CN115520837B (en) | 2024-03-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1420954A (en) * | 1972-06-14 | 1976-01-14 | British Gas Corp | Process for the extraction of sulphur from aqueous slurries |
| CN102674265A (en) * | 2012-05-28 | 2012-09-19 | 吴勇 | Method for producing insoluble sulfur by one-step water method |
| CN112661120A (en) * | 2020-12-17 | 2021-04-16 | 淮北师范大学 | Method and process for preparing insoluble sulfur from coking desulfurization waste residues |
| CN114772558A (en) * | 2022-04-27 | 2022-07-22 | 长沙华时捷环保科技发展股份有限公司 | Process for extracting elemental sulfur from high-sulfur ore/slag |
-
2022
- 2022-09-28 CN CN202211192169.2A patent/CN115520837B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1420954A (en) * | 1972-06-14 | 1976-01-14 | British Gas Corp | Process for the extraction of sulphur from aqueous slurries |
| CN102674265A (en) * | 2012-05-28 | 2012-09-19 | 吴勇 | Method for producing insoluble sulfur by one-step water method |
| CN112661120A (en) * | 2020-12-17 | 2021-04-16 | 淮北师范大学 | Method and process for preparing insoluble sulfur from coking desulfurization waste residues |
| CN114772558A (en) * | 2022-04-27 | 2022-07-22 | 长沙华时捷环保科技发展股份有限公司 | Process for extracting elemental sulfur from high-sulfur ore/slag |
Non-Patent Citations (1)
| Title |
|---|
| 王宁 等: ""从硫酸废渣中回收硫磺"", 《环境保护》, no. 6, pages 43 * |
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