CN116462157B - System and method for comprehensively utilizing coal washing waste containing high sulfur content - Google Patents
System and method for comprehensively utilizing coal washing waste containing high sulfur content Download PDFInfo
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- CN116462157B CN116462157B CN202310463573.7A CN202310463573A CN116462157B CN 116462157 B CN116462157 B CN 116462157B CN 202310463573 A CN202310463573 A CN 202310463573A CN 116462157 B CN116462157 B CN 116462157B
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- 239000003245 coal Substances 0.000 title claims abstract description 126
- 238000005406 washing Methods 0.000 title claims abstract description 80
- 239000011593 sulfur Substances 0.000 title claims abstract description 35
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 35
- 239000002699 waste material Substances 0.000 title claims abstract description 35
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 204
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 124
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 112
- 239000001257 hydrogen Substances 0.000 claims abstract description 112
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 238000004519 manufacturing process Methods 0.000 claims abstract description 41
- 238000010521 absorption reaction Methods 0.000 claims abstract description 19
- GOIGHUHRYZUEOM-UHFFFAOYSA-N [S].[I] Chemical compound [S].[I] GOIGHUHRYZUEOM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 20
- 238000002485 combustion reaction Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 150000002431 hydrogen Chemical class 0.000 claims description 7
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 6
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims description 6
- 229910000043 hydrogen iodide Inorganic materials 0.000 claims description 6
- 229910052740 iodine Inorganic materials 0.000 claims description 6
- 239000011630 iodine Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims description 3
- 230000028161 membrane depolarization Effects 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
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
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/68—Washing granular, powdered or lumpy materials; Wet separating by water impulse
-
- 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
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/50—Processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a system and a method for comprehensively utilizing high-sulfur-content coal washing waste, wherein the system comprises a raw coal conveying belt, a coal washing device, an incinerator, a sulfur dioxide absorbing device, a sulfuric acid collecting device, a clean coal transferring device, a steam supply device and the like; the method comprises the following steps: 1) Burning high-sulfur waste generated by washing raw coal to generate heat and sulfur dioxide; 2) The hydrogen production device is a sulfur-iodine circulating hydrogen production device, and can also be a mixed sulfur circulating hydrogen production device, the hydrogen production device utilizes sulfur dioxide to produce hydrogen and sulfuric acid, the hydrogen enters a hydrogen absorption device, and the sulfuric acid enters a sulfuric acid collection device; 3) The residual sulfuric acid solution after meeting the requirements of the coal washing device is electrolyzed to generate hydrogen and sulfur dioxide, and the sulfur dioxide enters the sulfur dioxide absorption device to be recycled. The invention prepares hydrogen by utilizing the waste generated by coal washing, can generate certain heat and can utilize industrial products, and has remarkable economic and environmental protection values.
Description
Technical Field
The invention belongs to the technical field of hydrogen preparation and coal, and particularly relates to a system and a method for comprehensively utilizing coal washing waste containing high sulfur content.
Background
The waste produced by washing the high-sulfur coal has high sulfur content, is used as solid waste for landfill treatment at present, and can cause environmental pollution if the treatment is not good.
Disclosure of Invention
The invention aims to provide a system and a method for comprehensively utilizing coal washing waste containing high sulfur content.
The invention is realized by adopting the following technical scheme:
A system for comprehensively utilizing coal washing waste containing high sulfur content comprises a raw coal conveyer belt, a coal washing device, an incinerator, a sulfur dioxide absorbing device, a sulfuric acid collecting device, a clean coal transferring device and a steam supply device;
The raw coal conveyer belt outlet is connected to the first inlet of the coal washing device, the first outlet of the sulfuric acid collecting device is connected to the second inlet of the coal washing device, the first outlet of the coal washing device is connected to the inlet of the incinerator, the second outlet of the coal washing device is connected to the inlet of the clean coal transferring device, the first outlet of the incinerator is connected to the inlet of the steam supply device, and the second outlet of the incinerator is connected to the first inlet of the sulfur dioxide absorbing device.
The invention is further improved in that sulfuric acid is needed in the coal washing process of the coal washing device, sulfuric acid is obtained from the sulfuric acid collecting device, raw coal conveyed from raw coal is washed by the coal washing device, clean coal enters the clean coal transferring device to be washed, high-sulfur coal washing waste generated by the coal washing of the clean coal transferring device enters the incinerator to be incinerated, heat generated by combustion is absorbed by water to form steam, the steam enters the steam supplying device, and sulfur dioxide contained in flue gas formed by combustion is absorbed by the sulfur dioxide absorbing device.
The invention is further improved in that the invention also comprises a hydrogen production device, a hydrogen absorption device and a sulfuric acid electrolysis device;
the outlet of the sulfur dioxide absorbing device is connected with the inlet of the hydrogen producing device, the first outlet of the hydrogen producing device is connected with the first inlet of the hydrogen absorbing device, the second outlet of the hydrogen producing device is connected with the inlet of the sulfuric acid collecting device, the second outlet of the sulfuric acid collecting device is connected with the inlet of the sulfuric acid electrolyzing device, the first outlet of the sulfuric acid electrolyzing device is connected with the second inlet of the hydrogen absorbing device, and the second outlet of the sulfuric acid electrolyzing device is connected with the second inlet of the sulfur dioxide absorbing device.
The invention is further improved in that the hydrogen production device is a sulfur-iodine cycle hydrogen production device.
The invention is further improved in that the hydrogen production device is a mixed sulfur circulation hydrogen production device.
The invention is further improved in that the hydrogen generated by the hydrogen production device enters the hydrogen absorption device, and the sulfuric acid generated by the hydrogen production device enters the sulfuric acid collection device.
The invention is further improved in that the sulfuric acid electrolysis device is an electrolysis device with a sacrificial cathode, sulfuric acid entering the sulfuric acid collection device, residual sulfuric acid meeting the requirements of the coal washing device enters the sulfuric acid electrolysis device to be electrolyzed to generate hydrogen, sulfur dioxide and cathode oxides, the hydrogen enters the hydrogen absorption device, the sulfur dioxide enters the sulfur dioxide absorption device to be recycled, the cathode oxides are separated to form industrial products, and the cathodes are timely replenished after being consumed.
The method for comprehensively utilizing the coal washing waste containing high sulfur content is based on the system for comprehensively utilizing the coal washing waste containing high sulfur content, and comprises the following steps:
1) After raw coal conveyed from raw coal is washed by a coal washing device, clean coal enters a clean coal transfer device, high-sulfur coal washing waste generated by coal washing enters an incinerator to be incinerated, heat generated by combustion is absorbed by water to form steam, the steam enters a steam supply device, sulfur dioxide contained in flue gas formed by combustion is absorbed by a sulfur dioxide absorption device, and sulfuric acid is required to be obtained from a sulfuric acid collecting device in the coal washing process;
2) When the hydrogen production device adopts the sulfur-iodine circulating hydrogen production device, sulfur dioxide reacts with iodine and water to generate hydrogen iodide and sulfuric acid, the sulfuric acid enters the sulfuric acid collecting device, the hydrogen iodide is decomposed to generate hydrogen and iodine, the hydrogen enters the hydrogen absorbing device, and the iodine enters the hydrogen production device to continuously participate in the subsequent reaction;
When the hydrogen production device adopts the mixed sulfur circulation hydrogen production device, sulfuric acid and hydrogen are generated after the sulfur dioxide solution is subjected to depolarization electrolysis, the hydrogen enters the hydrogen absorption device, and the sulfuric acid enters the sulfuric acid collection device;
3) The sulfuric acid entering the sulfuric acid collecting device enters the sulfuric acid electrolysis device after meeting the requirements of the coal washing device, hydrogen, sulfur dioxide and cathode oxides are generated by electrolysis, the hydrogen enters the hydrogen absorbing device, the sulfur dioxide enters the sulfur dioxide absorbing device for recycling, the cathode oxides are separated to form industrial products, and the cathodes are timely replenished after being consumed.
The invention has at least the following beneficial technical effects:
the system and the method for comprehensively utilizing the coal washing waste containing high sulfur provided by the invention have the following advantages:
Sulfuric acid is needed in the coal washing process of raw coal, and the cost of outsourcing sulfuric acid is high. The coal washing waste of the high-sulfur raw coal contains a large amount of parts and a certain heat value, and the conventional treatment mode of the waste is landfill, so that a certain pollution is caused to the environment. The invention provides the combustion of raw coal waste and utilizes the heat generated by the combustion; preparing high-value hydrogen by utilizing sulfur dioxide generated by combustion; the byproduct sulfuric acid from the hydrogen production can be used for coal washing. In the process, the waste generated by coal washing is utilized to prepare hydrogen, a certain amount of heat and available industrial product sulfuric acid can be generated, and the method has remarkable economic and environmental protection values.
Drawings
FIG. 1 is a block diagram of a system for the comprehensive utilization of high sulfur content coal washing waste.
Reference numerals illustrate:
1. A raw coal conveyor belt; 2. a coal washing device; 3. an incinerator; 4. a sulfur dioxide absorbing device; 5. a hydrogen production device; 6. a hydrogen gas absorption device; 7. a sulfuric acid collection device; 8. a sulfuric acid electrolysis device; 9. a clean coal transfer device; 10. and a steam supply device.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1, the system for comprehensively utilizing the coal washing waste containing high sulfur content provided by the invention comprises a raw coal conveying belt 1, a coal washing device 2, an incinerator 3, a sulfur dioxide absorbing device 4, a hydrogen production device 5, a hydrogen absorbing device 6, a sulfuric acid collecting device 7, a sulfuric acid electrolysis device 8, a clean coal transferring device 9 and a steam supply device 10.
The outlet of the raw coal conveying belt 1 is connected to the first inlet of the coal washing device 2, the first outlet of the sulfuric acid collecting device 7 is connected to the second inlet of the coal washing device 2, the first outlet of the coal washing device 2 is connected to the inlet of the incinerator 3, the second outlet of the coal washing device 2 is connected to the inlet of the clean coal transferring device 9, the first outlet of the incinerator 3 is connected to the inlet of the steam supply device 10, and the second outlet of the incinerator 3 is connected to the first inlet of the sulfur dioxide absorbing device 4; the outlet of the sulfur dioxide absorbing device 4 is connected with the inlet of the hydrogen making device 5, the first outlet of the hydrogen making device 5 is connected with the first inlet of the hydrogen absorbing device 6, the second outlet of the hydrogen making device 5 is connected with the inlet of the sulfuric acid collecting device 7, the second outlet of the sulfuric acid collecting device 7 is connected with the inlet of the sulfuric acid electrolyzing device 8, the first outlet of the sulfuric acid electrolyzing device 8 is connected with the second inlet of the hydrogen absorbing device 6, and the second outlet of the sulfuric acid electrolyzing device 8 is connected with the second inlet of the sulfur dioxide absorbing device 4.
Wherein, sulfuric acid is needed in the coal washing process of the coal washing device 2, sulfuric acid is obtained from the sulfuric acid collecting device 7, after raw coal from the raw coal conveying belt 1 is washed by the coal washing device 2, clean coal enters the clean coal transferring device 9 to wash coal, high-sulfur coal washing waste generated by the coal washing enters the incinerator 3 to be incinerated, heat generated by combustion is absorbed by water to form steam, the steam enters the steam supplying device 10, and sulfur dioxide contained in flue gas formed by combustion is absorbed by the sulfur dioxide absorbing device 4.
The hydrogen production device 5 is a sulfur-iodine cyclic hydrogen production device or a mixed sulfur cyclic hydrogen production device. The hydrogen produced by the hydrogen production device 5 enters the hydrogen absorption device 6, and the sulfuric acid produced by the hydrogen production device 5 enters the sulfuric acid collection device 7.
The sulfuric acid electrolysis device 8 is an electrolysis device of a sacrificial cathode, sulfuric acid entering the sulfuric acid collection device 7, residual sulfuric acid meeting the requirements of the coal washing device 2 enters the sulfuric acid electrolysis device 8 to be electrolyzed to generate hydrogen, sulfur dioxide and cathode oxides, the hydrogen enters the hydrogen absorption device 6, the sulfur dioxide enters the sulfur dioxide absorption device 4 to be recycled, the cathode oxides are separated to form industrial products, and the cathodes are timely replenished after being consumed.
The invention provides a method for comprehensively utilizing coal washing waste containing high sulfur content, which comprises the following steps:
1) After raw coal from a raw coal conveying belt 1 is washed by a coal washing device 2, clean coal enters a clean coal transfer device 9, high-sulfur coal washing waste generated by coal washing enters an incinerator 3 to be incinerated, heat generated by combustion is absorbed by water to form steam, the steam enters a steam supply device 10, sulfur dioxide contained in flue gas formed by combustion is absorbed by a sulfur dioxide absorbing device 4, and sulfuric acid is required to be obtained from a sulfuric acid collecting device 7 in the coal washing process;
2) When the hydrogen production device 5 adopts a sulfur-iodine circulating hydrogen production device, sulfur dioxide reacts with iodine and water to generate hydrogen iodide and sulfuric acid, the sulfuric acid enters a sulfuric acid collecting device 7, the hydrogen iodide is decomposed to generate hydrogen and iodine, the hydrogen enters a hydrogen absorbing device 6, and the iodine enters the hydrogen production device 5 to participate in subsequent reactions;
When the hydrogen production device 5 adopts a mixed sulfur circulation hydrogen production device, sulfuric acid and hydrogen are generated after the sulfur dioxide solution is subjected to depolarization electrolysis, the hydrogen enters the hydrogen absorption device 6, and the sulfuric acid enters the sulfuric acid collecting device 7;
3) The sulfuric acid entering the sulfuric acid collecting device 7 enters the sulfuric acid electrolysis device 8 after meeting the requirements of the coal washing device 2 to be electrolyzed to generate hydrogen, sulfur dioxide and cathode oxides, the hydrogen enters the hydrogen absorbing device 6, the sulfur dioxide enters the sulfur dioxide absorbing device 4 to be recycled, the cathode oxides are separated to form industrial products, and the cathode is timely replenished after being consumed.
Examples:
The sulfur content of the coal washing waste is higher in a certain coal washing factory, and the coal washing waste has a certain heat value. By adopting the technology, the steam generated by burning the waste can supply heat to the outside, and certain economic benefit is generated. The sulfur dioxide in the flue gas generated by burning the waste is high in sulfur content, the sulfur dioxide in the flue gas is absorbed by 30% of dilute sulfuric acid to generate a sulfur dioxide saturated solution, hydrogen and sulfuric acid are generated by electrolyzing the sulfur dioxide solution, part of generated sulfuric acid is used as coal washing, the other part of generated sulfuric acid is electrolyzed to generate sulfur dioxide, hydrogen and ferric oxide, the sulfur dioxide is absorbed by 30% of sulfuric acid and then is electrolyzed for recycling, the ferric oxide is separated out to be sold as an industrial product, and the hydrogen is pressurized and sold after being collected, so that good economic benefit is generated.
While the invention has been described in detail in the foregoing general description and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (6)
1. The system for comprehensively utilizing the coal washing waste containing high sulfur content is characterized by comprising a raw coal conveying belt (1), a coal washing device (2), an incinerator (3), a sulfur dioxide absorbing device (4), a sulfuric acid collecting device (7), a clean coal transferring device (9), a steam supply device (10), a hydrogen production device (5), a hydrogen absorbing device (6) and a sulfuric acid electrolysis device (8);
The outlet of the raw coal conveying belt (1) is connected to the first inlet of the coal washing device (2), the first outlet of the sulfuric acid collecting device (7) is connected to the second inlet of the coal washing device (2), the first outlet of the coal washing device (2) is connected to the inlet of the incinerator (3), the second outlet of the coal washing device (2) is connected to the inlet of the clean coal transferring device (9), the first outlet of the incinerator (3) is connected to the inlet of the steam supply device (10), and the second outlet of the incinerator (3) is connected to the first inlet of the sulfur dioxide absorbing device (4);
Sulfuric acid is needed in the coal washing process of the coal washing device (2), sulfuric acid is obtained from the sulfuric acid collecting device (7), raw coal from the raw coal conveying belt (1) is washed by the coal washing device (2), clean coal enters the clean coal transferring device (9), and high-sulfur coal washing waste generated by coal washing enters the incinerator (3) to be incinerated;
The outlet of the sulfur dioxide absorbing device (4) is connected with the inlet of the hydrogen making device (5), the first outlet of the hydrogen making device (5) is connected with the first inlet of the hydrogen absorbing device (6), the second outlet of the hydrogen making device (5) is connected with the inlet of the sulfuric acid collecting device (7), the second outlet of the sulfuric acid collecting device (7) is connected with the inlet of the sulfuric acid electrolyzing device (8), the first outlet of the sulfuric acid electrolyzing device (8) is connected with the second inlet of the hydrogen absorbing device (6), and the second outlet of the sulfuric acid electrolyzing device (8) is connected with the second inlet of the sulfur dioxide absorbing device (4);
The sulfuric acid electrolysis device (8) is an electrolysis device of a sacrificial cathode, sulfuric acid entering the sulfuric acid collection device (7) enters the sulfuric acid electrolysis device (8) after meeting the requirements of the coal washing device (2) to be electrolyzed to generate hydrogen, sulfur dioxide and cathode oxides, the hydrogen enters the hydrogen absorption device (6), the sulfur dioxide enters the sulfur dioxide absorption device (4) to be recycled, the cathode oxides are separated to form industrial products, and the cathodes are timely replenished after being consumed.
2. The system for comprehensively utilizing the coal washing waste containing high sulfur content according to claim 1, wherein the heat generated by combustion is absorbed by water to form steam which enters the steam supply device (10), and sulfur dioxide contained in the flue gas formed by combustion is absorbed by the sulfur dioxide absorbing device (4).
3. The system for comprehensive utilization of coal washing waste containing high sulfur content according to claim 1, wherein the hydrogen production device (5) is a sulfur-iodine circulating hydrogen production device.
4. The system for comprehensive utilization of coal washing waste containing high sulfur content according to claim 1, wherein the hydrogen production device (5) is a mixed sulfur circulation hydrogen production device.
5. The system for comprehensively utilizing the coal washing waste containing high sulfur content according to claim 1, wherein hydrogen generated by the hydrogen production device (5) enters the hydrogen absorption device (6), and sulfuric acid generated by the hydrogen production device (5) enters the sulfuric acid collection device (7).
6. A method for comprehensively utilizing high-sulfur-content coal washing waste, which is characterized by comprising the following steps of:
1) after raw coal from a raw coal conveying belt (1) is washed by a coal washing device (2), clean coal enters a clean coal transferring device (9), high-sulfur coal washing waste generated by coal washing enters an incinerator (3) to be incinerated, heat generated by combustion is absorbed by water to form steam, the steam enters a steam supply device (10), sulfur dioxide contained in flue gas formed by combustion is absorbed by a sulfur dioxide absorbing device (4), and sulfuric acid is required to be obtained from a sulfuric acid collecting device (7) in the coal washing process;
2) When the hydrogen production device (5) adopts a sulfur-iodine circulating hydrogen production device, sulfur dioxide reacts with iodine and water to generate hydrogen iodide and sulfuric acid, the sulfuric acid enters a sulfuric acid collecting device (7), the hydrogen iodide is decomposed to generate hydrogen and iodine, the hydrogen enters a hydrogen absorbing device (6), and the iodine enters the hydrogen production device (5) to continuously participate in the subsequent reaction;
When the hydrogen production device (5) adopts a mixed sulfur circulation hydrogen production device, sulfuric acid and hydrogen are generated after depolarization and electrolysis of sulfur dioxide solution, the hydrogen enters a hydrogen absorption device (6), and the sulfuric acid enters a sulfuric acid collection device (7);
3) The sulfuric acid entering the sulfuric acid collecting device (7) enters the sulfuric acid electrolysis device (8) after meeting the requirements of the coal washing device (2) to be electrolyzed to generate hydrogen, sulfur dioxide and cathode oxides, the hydrogen enters the hydrogen absorption device (6), the sulfur dioxide enters the sulfur dioxide absorption device (4) to be recycled, the cathode oxides are separated to form industrial products, and the cathode is timely replenished after being consumed.
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| CN111153387B (en) * | 2020-03-03 | 2024-08-02 | 衢州市鼎盛化工科技有限公司 | Recovery method and equipment for acid washing coal fluorine-containing waste liquid |
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