CN116334329A - Comprehensive circulation system of nuclear power generation and heat supply coupling hydrogen-rich blast furnace-converter - Google Patents
Comprehensive circulation system of nuclear power generation and heat supply coupling hydrogen-rich blast furnace-converter Download PDFInfo
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- CN116334329A CN116334329A CN202310215102.4A CN202310215102A CN116334329A CN 116334329 A CN116334329 A CN 116334329A CN 202310215102 A CN202310215102 A CN 202310215102A CN 116334329 A CN116334329 A CN 116334329A
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 127
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 127
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 238000010248 power generation Methods 0.000 title claims abstract description 36
- 230000008878 coupling Effects 0.000 title claims abstract description 9
- 238000010168 coupling process Methods 0.000 title claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 97
- 239000001307 helium Substances 0.000 claims abstract description 51
- 229910052734 helium Inorganic materials 0.000 claims abstract description 51
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 claims abstract description 47
- 239000001301 oxygen Substances 0.000 claims abstract description 44
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 239000002918 waste heat Substances 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 5
- 239000002351 wastewater Substances 0.000 claims abstract description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 32
- GOIGHUHRYZUEOM-UHFFFAOYSA-N [S].[I] Chemical compound [S].[I] GOIGHUHRYZUEOM-UHFFFAOYSA-N 0.000 claims description 23
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 238000004174 sulfur cycle Methods 0.000 claims description 14
- 239000001569 carbon dioxide Substances 0.000 claims description 13
- 238000006477 desulfuration reaction Methods 0.000 claims description 12
- 230000023556 desulfurization Effects 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000006298 dechlorination reaction Methods 0.000 claims description 10
- 238000004065 wastewater treatment Methods 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 7
- 230000003009 desulfurizing effect Effects 0.000 claims description 7
- 239000008235 industrial water Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 7
- 238000006722 reduction reaction Methods 0.000 claims description 7
- 230000001172 regenerating effect Effects 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 239000010842 industrial wastewater Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 239000000571 coke Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000006479 redox reaction Methods 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000007132 Bunsen reaction Methods 0.000 description 1
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a comprehensive circulation system of a nuclear power generation and heat supply coupling hydrogen-rich blast furnace-converter, which comprises a nuclear power generation system, a nuclear hydrogen production thermal circulation system and a hydrogen-rich blast furnace-converter system. The nuclear power generation system inputs electric energy and Rankine cycle water vapor into a nuclear power hydrogen production thermal circulation system by utilizing heat energy of helium and electric energy generated by a steam turbine, the nuclear power hydrogen production thermal circulation system generates hydrogen and oxygen through thermochemical reaction, the temperature is raised and waste heat is collected under the action of the nuclear power generation system respectively, reduction oxidation reaction is carried out on the hydrogen-enriched slag in a hydrogen-enriched blast furnace-converter system to produce steel, oxidized slag generates electric energy through Carolina cycle to supply the electric energy to top gas for recycling and collecting, and top gas washing wastewater is recycled to the nuclear power generation system. The invention realizes the full utilization of energy sources in a gradient way, solves the problems of hydrogen source and heating of the prior hydrogen-rich blast furnace, and can improve the overall efficiency, safety and economy of the system.
Description
Technical Field
The invention relates to a nuclear energy coupling hydrogen-rich blast furnace, in particular to a comprehensive circulating system of a nuclear energy power generation and heat supply coupling hydrogen-rich blast furnace-converter.
Background
The steel industry with high energy consumption is a large carbon emission household in 31 categories of manufacturing industry. At present, the crude steel yield in China is about 9. 963 billion tons, 53 for global steel production. 3, first, the CO2 emission is 21 hundred million tons, accounting for about 15 percent of the total national carbon emission. The steel yield of the blast furnace-converter flow based on carbon metallurgy and ore is about 90%, wherein blast furnace ironmaking is the procedure with the largest CO2 emission and accounts for about 70% -90% of the total CO2 emission in the whole steel production. The hydrogen is utilized to replace carbon to the maximum extent as a reducing agent and fuel in the iron-making process, and the product of the reaction of the hydrogen is water, so that CO2 emission can be further greatly reduced, and the low-carbon smelting of the blast furnace is fundamentally realized. The green hydrogen is used for the hydrogen-rich low-carbon smelting of the blast furnace, and has become a hot spot for developing the revolutionary technology of the steel manufacturing process. How to safely and efficiently supply high-temperature hydrogen-rich gas to a blast furnace is one of the keys to be solved for realizing the hydrogen-rich low-carbon smelting of the blast furnace. The high-temperature hydrogen-rich gas supplied to the blast furnace at present has inflammability and explosiveness, steel or alloy materials which are not high in hydrogen sensitivity and extremely resistant to high temperature and high pressure are selected, but the high-temperature strength of the conventional hydrogen-rich material is obviously reduced after the temperature exceeds 750 ℃, and the problem of premature failure caused by serious corrosion of the outer wall of a pipeline or a device exists, so that more suitable high-temperature corrosion, high-temperature creep and hydrogen embrittlement resistant high-temperature materials and heating modes are required to be further provided. Meanwhile, the comprehensive and effective utilization of the waste heat and residual energy of the whole process is further realized based on the traditional blast furnace-converter long process technology, the purposes of lowest process energy consumption and further energy conservation and carbon reduction are achieved, and a new system needs to be constructed and optimized.
Currently, means for preparing and utilizing hydrogen energy are still not mature. In the production of Chinese hydrogen, fossil raw materials are used as main industrial by-product hydrogen production as auxiliary materials, and the hydrogen production accounts for 70% and nearly 30% respectively, so that the problem of hydrogen purification technology exists, and green metallurgy cannot be really achieved.
Disclosure of Invention
In order to solve the problems, the invention provides a comprehensive circulating system of a nuclear power generation and heat supply coupling hydrogen-rich blast furnace-converter, which comprises a nuclear power generation system, a nuclear hydrogen production thermal circulating system and a hydrogen-rich blast furnace-converter system; the nuclear power generation system generates power through a high-temperature helium Brayton/Rankine bottom cycle and outputs water vapor to a nuclear power hydrogen production thermal cycle system, the nuclear power hydrogen production thermal cycle system generates thermochemical reaction to generate hydrogen and oxygen, the hydrogen is heated in the nuclear power heating cycle system, the oxygen releases heat in the nuclear power heating cycle system, and the high-temperature hydrogen and the low-temperature oxygen are input into a hydrogen-rich blast furnace-converter system after heat energy conversion is realized; wherein:
the nuclear power generation system comprises a nuclear reactor, a first turbine, a first generator, a steam generator, a first compressor, a second turbine, a second generator, a condenser, a condensate pump, a low-pressure heater, a deoxidizer, a feed pump and a high-pressure heater;
the high-temperature helium is output to a first turbine and a nuclear energy hydrogen production thermal circulation system by a nuclear reactor; the high-temperature helium expands in the first turbine to do work to drive the first generator to generate electricity, and the first turbine outputs low-pressure helium to the steam generator; the low-pressure helium gas is sent to a second steam turbine by circulating heat energy in a Rankine bottom in a steam generator to realize industrial water vapor conversion, and is compressed by a first gas compressor, then is used as a reactor coolant again and is input into a nuclear reactor for circulation;
introducing part of water vapor to a nuclear hydrogen production thermal circulation system by a second steam turbine; the water vapor expands and works in a second turbine to drive a second generator to generate electricity and then enters a condenser, electric energy generated by the second generator is input into a nuclear energy hydrogen production heat circulation system, condensed water output by the condenser passes through a condensed water pump and is combined with industrial wastewater provided by a hydrogen-rich blast furnace-converter system, and the industrial wastewater sequentially passes through a low-pressure heater, a deaerator, a water supply pump and a high-pressure heater to enter a tube side of a steam generator to remove oxygen and other gases in the water and then is used as part of water supply of steam Rankine cycle;
the nuclear energy hydrogen production thermal circulation system comprises a first pressure reducing valve, a second pressure reducing valve, an iodine-sulfur circulation hydrogen production and oxygen production device, a gas mixing chamber, a high-temperature low-pressure heater and a temperature control system;
the nuclear reactor outputs high-temperature helium to a second pressure reducing valve, and part of water vapor is led out from a second steam turbine to the second pressure reducing valve to be depressurized to the working pressure of the iodine-sulfur cycle hydrogen-oxygen generating device together, the output high-temperature helium and the high-temperature water vapor jointly provide heat energy of the iodine-sulfur cycle hydrogen-oxygen generating device, the water vapor required by the thermochemical reaction of the iodine-sulfur cycle hydrogen-oxygen generating device is supplemented by the high-temperature water vapor, and the iodine-sulfur cycle hydrogen-oxygen generating device generates high-temperature hydrogen and oxygen through the thermochemical reaction; the generated high-temperature hydrogen enters a gas mixing chamber to form high-temperature reducing atmosphere with coke oven gas and carbon monoxide generated by a hydrogen-rich blast furnace-converter system, and the heat energy exchange is realized by the high-temperature helium with stable pressure and temperature through a second pressure reducing valve and a temperature control system at a high-temperature low-pressure heater, and then enters the hydrogen-rich blast furnace-converter system; the high-temperature oxygen releases heat through the low-pressure heater and the high-pressure heater, and is input into a hydrogen-rich blast furnace-converter system after heat energy conversion is realized;
the hydrogen-rich blast furnace-converter system comprises a hydrogen-rich blast furnace, a converter, a waste heat recovery device of slag, a third generator and a top gas purification device; the top gas purifying device comprises a desulfurizing tower, a capturing tower, a regenerating tower, a dust remover, a top gas dechlorination desulfurization wastewater treatment device, a second gas compressor and a carbon dioxide storage tank;
the generated high-temperature reducing atmosphere is subjected to reduction reaction through a hydrogen-rich blast furnace, molten iron is generated, molten iron enters a converter, low-temperature oxygen enters the hydrogen-rich blast furnace and the converter to perform oxidation reaction, product steel is generated, and meanwhile, waste heat of slag is utilized to pass through a waste heat recovery device of the slag, a Carroner circulating power generation system is adopted to realize heat energy and electric energy conversion, so that a third generator generates power to apply work to a top gas purification device and a top gas dechlorination desulfurization wastewater treatment device;
the hydrogen-rich blast furnace is discharged to the top gas purification device after passing through the dust remover, and then enters the desulfurizing tower, the capturing tower and the regenerating tower in sequence, and then the residual gas components are discharged to enter the air;
the top gas is input into a desulfurization tower in a top gas purifying device, and the blast furnace gas washing wastewater is output into a condensate pump to be circulated to provide industrial water required by an iodine-sulfur circulation hydrogen and oxygen production device;
the carbon monoxide is captured by the capturing tower and is input into the gas mixing chamber to be circularly supplemented with the reducing atmosphere;
the regeneration tower extracts carbon dioxide and inputs the carbon dioxide into the second compressor and the carbon dioxide storage tank.
Further, the nuclear reactor is a modular high temperature gas cooled reactor, the reflective layer is graphite, the coolant is helium, and the coolant flows through the reactor core from the top of the reactor.
Further, the high-temperature low-pressure heater is a shell-and-tube heat exchanger, the shell-side working medium is helium and reducing atmosphere respectively, and GH3536 nickel-based alloy is adopted.
Further, the high temperature helium pipeline material adopts 310S austenitic stainless steel containing Al.
Further, the iodine-sulfur circulation hydrogen and oxygen production device and the pipeline thereof adopt 310S austenitic stainless steel containing Al.
Further, the working temperature of the iodine-sulfur circulation hydrogen and oxygen production device is 800-900 ℃ and the working pressure is 4-5MPa.
Further, the pressure of the high-temperature helium gas output by the nuclear reactor is 7-8MPa, and the temperature is 900-1000 ℃.
Further, the temperature of the low pressure helium gas output from the first gas turbine is 600-700 ℃.
Further, the temperature of the low-temperature low-pressure helium gas discharged from the steam generator to the first compressor is 300-400 ℃, and the temperature is increased to 350-450 ℃ after the low-temperature low-pressure helium gas is compressed by the first compressor.
Further, a high-temperature reducing atmosphere is blown from the lower part or waist of the hydrogen-rich blast furnace shaft, and GH3536 nickel-based alloy is used for the gas pipeline and the gas flow distribution device in the furnace.
Compared with the prior art, the invention has the following advantages:
1. the invention adopts the high-temperature helium generated by nuclear energy as inert atmosphere, which is safer than other fuel gases, and adopts the novel Al-containing 310S austenitic stainless steel and GH3536 nickel-based alloy for the high-temperature pipeline materials and devices, thereby effectively prolonging the service lives of the pipeline, the reactor and the heater;
2. the invention can utilize high-temperature hydrogen and oxygen generated by nuclear energy in a blast furnace-converter process, and blast furnace gas washing wastewater generated by a blast furnace can be recycled in a nuclear energy hydrogen production process, so as to realize complementary recycling of resources;
3. the invention fully utilizes the nuclear power technology and the waste heat power generation technology of slag, and can reduce partial power supply cost. Even part of the electric energy can be used in other fields of the factory, and the economic benefit of the steel factory is improved.
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of a comprehensive circulation system of a nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter.
Reference numerals illustrate:
1-nuclear reactor 2-first turbine 3-first generator 4-steam generator 5-first compressor 6-first pressure reducing valve 7-second turbine 8-second generator 9-condenser 10-condensate pump 11-low pressure heater 12-deoxidizer 13-feed pump 14-high pressure heater 15-second pressure reducing valve 16-iodine sulfur cycle hydrogen-making oxygen plant 17-gas mixing chamber 18-high temperature low pressure heat exchanger 19-temperature control system 20-waste heat recovery device 23-third generator 24-top gas purification device (241-desulfurizing tower 242-capturing tower 243-regenerating tower) 25-dust remover 26-top gas dechlorination desulfurization waste water treatment device 27-second compressor 28-carbon dioxide storage tank of hydrogen-making oxygen plant
Detailed Description
The following description of the preferred embodiments of the present invention refers to the accompanying drawings, which make the technical contents thereof more clear and easy to understand. The present invention may be embodied in many different forms of embodiments and the scope of the present invention is not limited to only the embodiments described herein.
The invention relates to a comprehensive circulation system of a nuclear power generation and heat supply coupling hydrogen-rich blast furnace-converter, which comprises a nuclear power generation system, a nuclear hydrogen production thermal circulation system and a hydrogen-rich blast furnace-converter system; the nuclear power generation system generates power through high-temperature helium Brayton/Rankine bottoming cycle and outputs water vapor to a nuclear power hydrogen production thermal circulation system, the nuclear power hydrogen production thermal circulation system generates thermochemical reaction to generate hydrogen and oxygen, the hydrogen is heated by utilizing heat energy and electric energy in the nuclear power heating circulation system, the oxygen releases waste heat in the nuclear power heating circulation system, and the high-temperature hydrogen and low-temperature oxygen are input into a hydrogen-rich blast furnace-converter system to be utilized as a reducing oxidizing atmosphere after heat energy conversion is realized.
As shown in fig. 1, the nuclear power generation system includes a nuclear reactor 1, a first turbine 2, a first generator 3, a steam generator 4, a first compressor 5, a second turbine 7, a second generator 8, a condenser 9, a condensate pump 10, a low-pressure heater 11, a deoxidizer 12, a feed pump 13, and a high-pressure heater 14.
The nuclear energy hydrogen production thermal circulation system comprises a first pressure reducing valve 6, a second pressure reducing valve 15, an iodine-sulfur circulation hydrogen production and oxygen production device 16, a gas mixing chamber 17, a high-temperature low-pressure heater 18 and a temperature control system 19.
The nuclear reactor 1 outputs high-temperature helium with the temperature of 900-1000 ℃ and the pressure of 7-8MPa, and the high-temperature helium pipeline materials are respectively made of 310S austenitic stainless steel containing Al and are respectively input into a first turbine 2 of a nuclear power generation system and a second pressure reducing valve 15 of a nuclear energy hydrogen production thermal circulation system.
Part of high-temperature helium gas fed into the nuclear power generation system expands in the first turbine 2 to do work to drive the first generator 3 to generate power, the first turbine 2 outputs low-pressure helium gas to the steam generator 4, and the temperature of the low-pressure helium gas obtained by mixing the low-pressure helium gas output by the first turbine 2 with the low-pressure helium gas circulated by the nuclear hydrogen production thermal circulation system is 600-700 ℃; the low-pressure helium circulates heat energy in a Rankine bottom to realize industrial water to be converted into steam, the steam is sent to a second steam turbine 7, low-temperature low-pressure helium with the temperature of 300-400 ℃ is discharged to a first compressor 5, the low-temperature helium passes through the first compressor 5, and the compressed helium with the temperature of 350-450 ℃ is input into the nuclear reactor 1.
Heating industrial water subjected to low-pressure helium heat exchange to a steam generator 4 to form water vapor, introducing part of the water vapor to a first pressure reducing valve 6 of a nuclear energy hydrogen production heat circulation system by a second steam turbine 7, decompressing and then delivering the decompressed water vapor to an iodine-sulfur circulation hydrogen production and oxygen production device 16; the rest of water vapor expands in the second turbine 7 to do work to drive the second generator 8 to generate electricity and then enter the condenser 9, the electric energy generated by the second generator 8 is input into the temperature control system 19 of the nuclear energy hydrogen production thermal circulation system, the condensed water output by the condenser 9 passes through the condensed water pump 10 and combines the industrial wastewater provided by the hydrogen-rich blast furnace-converter system, and sequentially passes through the low-pressure heater 11, the deaerator 12, the water feeding pump 13 and the high-pressure heater 14 to enter the tube side of the steam generator 4 to serve as the water feeding of the Rankine cycle.
The nuclear reactor 1 outputs the rest high-temperature helium gas to the second pressure reducing valve 15 for pressure reduction, and the rest high-temperature helium gas and the water vapor after the pressure reduction by the second pressure reducing valve 6 jointly provide the required heat energy for the iodine-sulfur cycle hydrogen-oxygen generating device 16 with the working temperature of 800-900 ℃ and the working pressure of 4-5MPa, and the high-temperature water vapor simultaneously plays the role of supplementing water required by the thermochemical reaction of the iodine-sulfur cycle hydrogen-oxygen generating device 16, and the iodine-sulfur cycle hydrogen-oxygen generating device 16 generates high-temperature hydrogen and oxygen through the thermochemical reaction, and the method comprises the following steps:
bunsen reaction (20-120 ℃): is+SO 2 +2H 2 O→2HI+H 2 SO 4
Sulfuric acid decomposition reaction (800-900 ℃) of 2 HI-I 2 +H 2
Taking high temperature and acid etching into consideration, the iodine-sulfur cycle hydrogen and oxygen production device 16 and the pipeline thereof are made of 310S austenitic stainless steel containing Al; the generated high-temperature hydrogen enters a gas mixing chamber 17 to form a high-temperature reducing atmosphere with carbon monoxide generated by coke oven gas and a top gas purifying device 24 of a hydrogen-rich blast furnace-converter system, a high-temperature helium gas at 1000-1100 ℃ which is electrically heated by a second pressure reducing valve 15 and a temperature control system 19 is subjected to heat energy exchange by adopting a GH3536 nickel-based alloy high-temperature low-pressure heater 18 to heat up to 950-1050 ℃, then enters the hydrogen-rich blast furnace-converter system, the temperature of the low-temperature helium gas after heat energy transfer is reduced to 750-850 ℃, and the low-temperature helium gas at 300-500 ℃ after heat energy loss of an iodine-sulfur cycle hydrogen-making oxygen-making device 16 is converged, and finally the helium gas at 600-700 ℃ is formed and enters a nuclear power generation system for recycling; and the high-temperature oxygen releases heat through the low-pressure heater 11 and the high-pressure heater 14, so that the heat energy is converted and then is input into a hydrogen-rich blast furnace-converter system for recycling.
The hydrogen-rich blast furnace-converter system comprises a hydrogen-rich blast furnace 20, a converter 21, a waste heat recovery device 22 of slag, a third generator 23, a top gas purifying device 24, a dust remover 25, a top gas dechlorination and desulfurization wastewater treatment device 26, a second gas compressor 27 and a carbon dioxide storage tank 28.
The high-temperature reducing atmosphere generated by the nuclear energy hydrogen production thermal circulation system is blown from the lower part or the waist of the furnace body of the hydrogen-rich blast furnace 20, and a GH3536 nickel-based alloy is used as a gas pipeline and a furnace inner gas flow distribution device; the hydrogen-rich blast furnace 20 undergoes a reduction reaction, molten iron is produced and enters a converter 21, low-temperature oxygen enters the hydrogen-rich blast furnace 20 and the converter 21 to undergo an oxidation reaction, product steel is produced, and meanwhile, waste heat of slag is utilized to pass through a waste heat recovery device 22 of slag, a Carroner cycle power generation system is adopted to realize heat energy and electric energy conversion, so that a third generator 23 generates power to apply work to a top gas purification device 24 and a top gas dechlorination and desulfurization wastewater treatment device 26.
The top gas generated after the reduction and oxidation reaction of the hydrogen-rich blast furnace 20 sequentially passes through a dust remover 25 and a top gas purifying device 24, and then the residual harmless gas components are discharged into the air;
the top gas input top gas cleaning device 24 comprises a desulfurizing tower 241, a capturing tower 242 and a regenerating tower 243; the desulfurizing tower 241 is communicated with the capturing tower 242, the dust remover 25 and the top gas dechlorination and desulfurization wastewater treatment device 26, the top gas dechlorination and desulfurization wastewater treatment device 26 is communicated with the condensate pump 10, the capturing tower 242 is communicated with the regenerating tower 243 and the gas mixing chamber 17, and the regenerating tower 243 is communicated with the second air compressor 27;
the top gas after passing through the dust remover 25 passes through a desulfurizing tower 241 to remove toxic atmospheres such as hydrogen chloride, carbonyl sulfide, hydrogen sulfide and the like, and the formed top gas washing wastewater enters a condensate pump 10 after being treated by a top gas dechlorination desulfurization wastewater treatment device 26 to be used as industrial water of Rankine cycle, so that the cycle is realized; the primarily purified top gas is further captured by a capturing tower 242 and carbon monoxide is input into the gas mixing chamber 17 to circularly adjust and supplement the reducing atmosphere; finally, the purified top gas is subjected to carbon dioxide extraction through a regeneration tower 243, the extracted carbon dioxide is input into a second compressor 27 for compression and then stored in a carbon dioxide storage tank 28, and the purified top gas is finally discharged for other industries.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention without requiring creative effort by one of ordinary skill in the art. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (10)
1. The comprehensive circulating system of the nuclear power generation and heat supply coupling hydrogen-rich blast furnace-converter is characterized by comprising a nuclear power generation system, a nuclear power hydrogen production thermal circulating system and a hydrogen-rich blast furnace-converter system; the nuclear power generation system generates power through a high-temperature helium Brayton/Rankine bottom cycle and outputs water vapor to a nuclear power hydrogen production thermal cycle system, the nuclear power hydrogen production thermal cycle system generates thermochemical reaction to generate hydrogen and oxygen, the hydrogen is heated in the nuclear power heating cycle system, the oxygen releases heat in the nuclear power heating cycle system, and the high-temperature hydrogen and the low-temperature oxygen are input into a hydrogen-rich blast furnace-converter system after heat energy conversion is realized; wherein:
the nuclear power generation system comprises a nuclear reactor, a first turbine, a first generator, a steam generator, a first compressor, a second turbine, a second generator, a condenser, a condensate pump, a low-pressure heater, a deoxidizer, a feed pump and a high-pressure heater;
the high-temperature helium is output to a first turbine and a nuclear energy hydrogen production thermal circulation system by a nuclear reactor; the high-temperature helium expands in the first turbine to do work to drive the first generator to generate electricity, and the first turbine outputs low-pressure helium to the steam generator; the low-pressure helium gas is sent to a second steam turbine by circulating heat energy in a Rankine bottom in a steam generator to realize industrial water vapor conversion, and is compressed by a first gas compressor, then is used as a reactor coolant again and is input into a nuclear reactor for circulation;
introducing part of water vapor to a nuclear hydrogen production thermal circulation system by a second steam turbine; the water vapor expands and works in a second turbine to drive a second generator to generate electricity and then enters a condenser, electric energy generated by the second generator is input into a nuclear energy hydrogen production heat circulation system, condensed water output by the condenser passes through a condensed water pump and is combined with industrial wastewater provided by a hydrogen-rich blast furnace-converter system, and the industrial wastewater sequentially passes through a low-pressure heater, a deaerator, a water supply pump and a high-pressure heater to enter a tube side of a steam generator to remove oxygen and other gases in the water and then is used as part of water supply of steam Rankine cycle;
the nuclear energy hydrogen production thermal circulation system comprises a first pressure reducing valve, a second pressure reducing valve, an iodine-sulfur circulation hydrogen production and oxygen production device, a gas mixing chamber, a high-temperature low-pressure heater and a temperature control system;
the nuclear reactor outputs high-temperature helium to a second pressure reducing valve, and part of water vapor is led out from a second steam turbine to the second pressure reducing valve to be depressurized to the working pressure of the iodine-sulfur cycle hydrogen-oxygen generating device together, the output high-temperature helium and the high-temperature water vapor jointly provide heat energy of the iodine-sulfur cycle hydrogen-oxygen generating device, the water vapor required by the thermochemical reaction of the iodine-sulfur cycle hydrogen-oxygen generating device is supplemented by the high-temperature water vapor, and the iodine-sulfur cycle hydrogen-oxygen generating device generates high-temperature hydrogen and oxygen through the thermochemical reaction; the generated high-temperature hydrogen enters a gas mixing chamber to form high-temperature reducing atmosphere with coke oven gas and carbon monoxide generated by a hydrogen-rich blast furnace-converter system, and the heat energy exchange is realized by the high-temperature helium with stable pressure and temperature through a second pressure reducing valve and a temperature control system at a high-temperature low-pressure heater, and then enters the hydrogen-rich blast furnace-converter system; the high-temperature oxygen releases heat through the low-pressure heater and the high-pressure heater, and is input into a hydrogen-rich blast furnace-converter system after heat energy conversion is realized;
the hydrogen-rich blast furnace-converter system comprises a hydrogen-rich blast furnace, a converter, a waste heat recovery device of slag, a third generator and a top gas purification device; the top gas purifying device comprises a desulfurizing tower, a capturing tower, a regenerating tower, a dust remover, a top gas dechlorination desulfurization wastewater treatment device, a second gas compressor and a carbon dioxide storage tank;
the generated high-temperature reducing atmosphere is subjected to reduction reaction through a hydrogen-rich blast furnace, molten iron is generated, molten iron enters a converter, low-temperature oxygen enters the hydrogen-rich blast furnace and the converter to perform oxidation reaction, product steel is generated, and meanwhile, waste heat of slag is utilized to pass through a waste heat recovery device of the slag, a Carroner circulating power generation system is adopted to realize heat energy and electric energy conversion, so that a third generator generates power to apply work to a top gas purification device and a top gas dechlorination desulfurization wastewater treatment device;
the hydrogen-rich blast furnace is discharged to the top gas purification device after passing through the dust remover, and then enters the desulfurizing tower, the capturing tower and the regenerating tower in sequence, and then the residual gas components are discharged to enter the air;
the top gas is input into a desulfurization tower in a top gas purifying device, and the blast furnace gas washing wastewater is output into a condensate pump to be circulated to provide industrial water required by an iodine-sulfur circulation hydrogen and oxygen production device;
the carbon monoxide is captured by the capturing tower and is input into the gas mixing chamber to be circularly supplemented with the reducing atmosphere;
the regeneration tower extracts carbon dioxide and inputs the carbon dioxide into the second compressor and the carbon dioxide storage tank.
2. The integrated circulation system of a nuclear power generation, heat supply coupled hydrogen rich blast furnace-converter of claim 1, wherein the nuclear reactor is a modular high temperature gas cooled reactor, the reflective layer is graphite, the coolant is helium, and the coolant flows through the core from the top of the reactor.
3. The comprehensive circulating system of the nuclear power generation and heat supply coupling hydrogen-rich blast furnace-converter as claimed in claim 1, wherein the high-temperature low-pressure heater is a shell-and-tube heat exchanger, the shell-side working medium is helium and a reducing atmosphere respectively, and the GH3536 nickel-based alloy is adopted.
4. The integrated circulation system of a nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter as claimed in claim 1, wherein the high temperature helium pipeline material is 310S austenitic stainless steel containing Al.
5. The comprehensive circulation system of nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter as claimed in claim 1, wherein the iodine-sulfur circulation hydrogen-making and oxygen-making device and the pipeline thereof adopt 310S austenitic stainless steel containing Al.
6. The comprehensive circulation system of nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter as claimed in claim 1, wherein the working temperature of the iodine-sulfur circulation hydrogen-making and oxygen-making device is 800-900 ℃ and the working pressure is 4-5MPa.
7. The integrated circulation system of a nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter as claimed in claim 1, wherein the pressure of the high-temperature helium gas output from the nuclear reactor is 7-8MPa and the temperature is 900-1000 ℃.
8. The integrated circulation system of a nuclear power generating and heat supplying coupled hydrogen-rich blast furnace-converter as set forth in claim 1, wherein the low pressure helium gas outputted from the first gas turbine has a temperature of 600-700 ℃.
9. The integrated circulation system of a nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter according to claim 1, wherein the low temperature and low pressure helium gas discharged from the steam generator to the first compressor is 300-400 ℃, and the temperature is increased to 350-450 ℃ after the low temperature and low pressure helium gas is compressed by the first compressor.
10. The integrated circulation system of a nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter as claimed in claim 1, wherein the high-temperature reducing atmosphere is blown from the lower part or waist of the hydrogen-rich blast furnace shaft, and the GH3536 nickel-based alloy is used as the gas pipeline and the in-furnace gas flow distribution device.
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