A comprehensive circulation system of nuclear power generation and heat supply coupled with hydrogen-rich blast furnace-converter

Abstract

The present invention discloses a comprehensive cycle system of nuclear power generation and heat supply coupled with hydrogen-rich blast furnace-converter, and the system includes a nuclear power generation system, a nuclear hydrogen production heat cycle system, and a hydrogen-rich blast furnace-converter system. The nuclear power generation system inputs electric energy and water vapor of the Rankine cycle into the nuclear hydrogen production heat cycle system by utilizing the thermal energy of helium and the electric energy generated by the steam turbine, and the nuclear hydrogen production heat cycle system undergoes thermochemical reactions to generate hydrogen and oxygen, which are heated and waste heat is collected respectively under the action of the nuclear power generation system, and then enters the hydrogen-rich blast furnace-converter system to undergo reduction-oxidation reactions to produce steel, and the oxidized slag generates electric energy through the Carona cycle to supply the furnace top gas circulation collection and utilization, and the furnace top gas washing wastewater is circulated to the nuclear power generation system. The present invention realizes full utilization of energy in a gradient manner, solves the current hydrogen source and heating problems of the hydrogen-rich blast furnace, and can improve the overall efficiency, safety and economy of the system.

Description

Technical Field

[0001] The invention relates to a nuclear energy coupled hydrogen-rich blast furnace, and in particular to a comprehensive circulation system of nuclear energy power generation and heat supply coupled hydrogen-rich blast furnace-converter. Background Art

[0002] The energy-intensive steel industry is the largest carbon emitter among the 31 manufacturing industries. At present, my country's crude steel output is about 996.3 million tons, accounting for 53.3% of the world's steel output, ranking first in the world, and CO2 emissions are 2.1 billion tons, accounting for about 15% of the country's total carbon emissions. The blast furnace-converter process based on carbon metallurgy and ore accounts for about 90% of steel production, among which blast furnace ironmaking is the process with the largest CO2 emissions, accounting for about 70%-90% of the total CO2 emissions of the entire steel production. Using hydrogen to replace carbon as a reducing agent and fuel in the ironmaking process to the maximum extent, the product of hydrogen participating in the reaction is water, which can further significantly reduce CO2 emissions and fundamentally realize low-carbon smelting in blast furnaces. Using green hydrogen for hydrogen-rich low-carbon smelting in blast furnaces has become a hot spot for the research and development of transformative technologies for steel manufacturing processes. How to safely and efficiently supply high-temperature hydrogen-rich gas to blast furnaces is one of the key issues that need to be solved to achieve hydrogen-rich low-carbon smelting in blast furnaces. The high-temperature hydrogen-rich gas currently supplied to the blast furnace is flammable and explosive. Steel or alloy materials that are not highly sensitive to hydrogen and are extremely resistant to high temperature and high pressure should be selected. However, the common hydrogen-adjacent materials currently have a problem of premature failure caused by a significant reduction in high-temperature strength after the temperature exceeds 750°C and severe corrosion of the outer wall of the pipeline or device. It is necessary to further provide more suitable high-temperature materials and heating methods that are resistant to high-temperature corrosion, high-temperature creep, and hydrogen embrittlement. At the same time, based on the traditional blast furnace-converter long process, further comprehensive and effective utilization of waste heat and waste energy in the entire process, to achieve the goal of minimizing process energy consumption and further saving energy and reducing carbon, it is also necessary to build and optimize new systems.

[0003] At present, the means of preparing and utilizing hydrogen energy are still immature. China's hydrogen production capacity is mainly based on hydrogen produced from fossil raw materials, supplemented by hydrogen produced from industrial byproducts, accounting for 70% and nearly 30% respectively. Not only are there problems with hydrogen purification technology, but it is also impossible to truly achieve green metallurgy. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a nuclear power generation, heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system, comprising a nuclear power generation system, a nuclear hydrogen production heat cycle system, and a hydrogen-rich blast furnace-converter system; wherein the nuclear power generation system generates electricity through a high-temperature helium Brayton / Rankine cycle and outputs water vapor to the nuclear hydrogen production heat cycle system, the nuclear hydrogen production heating cycle system undergoes a thermochemical reaction to produce hydrogen and oxygen, the hydrogen is heated in the nuclear heating cycle system, the oxygen releases heat in the nuclear heating cycle system, and the high-temperature hydrogen and low-temperature oxygen are input into the hydrogen-rich blast furnace-converter system after achieving heat energy conversion; wherein:

[0005] The nuclear power generation system includes a nuclear reactor, a first steam turbine, a first generator, a steam generator, a first compressor, a second steam turbine, a second generator, a condenser, a condensate pump, a low-pressure heater, a deaerator, a feed water pump, and a high-pressure heater;

[0006] High-temperature helium is output from the nuclear reactor to the first steam turbine and the nuclear energy hydrogen production thermal cycle system; the high-temperature helium expands in the first steam turbine to drive the first generator to generate electricity, and the first steam turbine outputs low-pressure helium to the steam generator; the low-pressure helium converts heat energy into industrial water in the Rankine cycle in the steam generator and sends it to the second steam turbine, and the low-pressure and low-temperature helium is compressed by the first compressor and then used as reactor coolant again and input into the nuclear reactor cycle;

[0007] The second steam turbine introduces part of the water vapor into the nuclear energy hydrogen production thermal cycle system; the water vapor expands in the second steam turbine to drive the second generator to generate electricity, and then enters the condenser. The electric energy generated by the second generator is input into the nuclear energy hydrogen production thermal cycle system. The condensate output by the condenser passes through the condensate pump, and is combined with the industrial wastewater provided by the hydrogen-rich blast furnace-converter system. It passes through the low-pressure heater, deaerator, feed water pump, and high-pressure heater in sequence and enters the steam generator tube side to remove oxygen and other gases in the water, and then serves as part of the feed water for the steam Rankine cycle;

[0008] The nuclear energy hydrogen production thermal cycle system includes a first pressure reducing valve, a second pressure reducing valve, an iodine-sulfur cycle hydrogen and oxygen production device, a gas mixing chamber, a high-temperature low-pressure heater, and a temperature control system;

[0009] The nuclear reactor outputs high-temperature helium to the second pressure reducing valve, and together with part of the water vapor drawn out from the second steam turbine to the second pressure reducing valve, the pressure is reduced to the working pressure of the iodine-sulfur cycle hydrogen production and oxygen production device. The output high-temperature helium and high-temperature water vapor together provide thermal energy for the iodine-sulfur cycle hydrogen production and oxygen production device, and the high-temperature water vapor supplements the water vapor required for the thermochemical reaction of the iodine-sulfur cycle hydrogen production and oxygen production device. The iodine-sulfur cycle hydrogen production and oxygen production device undergoes a thermochemical reaction to produce high-temperature hydrogen and oxygen; the produced high-temperature hydrogen enters the gas mixing chamber to form a high-temperature reducing atmosphere with the coke oven gas and the carbon monoxide produced by the hydrogen-rich blast furnace-converter system, and the high-temperature helium with stable pressure and temperature through the second pressure reducing valve and the temperature control system realizes heat energy exchange in the 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, realizes heat energy conversion, and then is input into the hydrogen-rich blast furnace-converter system;

[0010] The hydrogen-rich blast furnace-converter system includes a hydrogen-rich blast furnace, a converter, a slag waste heat recovery device, a third generator, and a furnace top gas purification device; the furnace top gas purification device includes a desulfurization tower, a capture tower, a regeneration tower, a dust collector, a furnace top gas dechlorination and desulfurization wastewater treatment device, a second compressor, and a carbon dioxide storage tank;

[0011] The high-temperature reducing atmosphere generated undergoes a reduction reaction through the hydrogen-rich blast furnace, producing molten iron that enters the converter, and low-temperature oxygen enters the hydrogen-rich blast furnace and the converter to undergo an oxidation reaction to produce product steel. At the same time, the slag waste heat is used to pass through the slag waste heat recovery device, and the Carona cycle power generation system is used to achieve heat and electrical energy conversion, so that the third generator generates electricity and does work for the furnace top gas purification device and the furnace top gas dechlorination and desulfurization wastewater treatment device;

[0012] The top gas discharged from the hydrogen-rich blast furnace passes through the dust collector and then enters the top gas purification device, and then enters the desulfurization tower, capture tower, and regeneration tower in sequence, and then the remaining gas components are discharged into the air;

[0013] The top gas is input into the desulfurization tower of the top gas purification device, and the blast furnace gas washing wastewater is output into the condensate pump circulation to provide the industrial water required by the iodine-sulfur circulation hydrogen and oxygen production device;

[0014] The capture tower captures carbon monoxide and inputs it into the gas mixing chamber for circulation to supplement the reducing atmosphere;

[0015] The regeneration tower extracts carbon dioxide and inputs it into the second compressor and the carbon dioxide storage tank.

[0016] Furthermore, the nuclear reactor is a modular high temperature gas-cooled reactor, the reflector layer is graphite, and the coolant is helium, which flows through the core from the top of the reactor.

[0017] Furthermore, the high-temperature low-pressure heater is a shell and tube heat exchanger, the shell side working fluids are helium and reducing atmosphere, and GH3536 nickel-based alloy is used.

[0018] Furthermore, the high-temperature helium pipeline material adopts 310S austenitic stainless steel containing Al.

[0019] Furthermore, the iodine-sulfur cycle hydrogen and oxygen production device and its pipelines are made of Al-containing 310S austenitic stainless steel.

[0020] Furthermore, the operating temperature of the iodine-sulfur cycle hydrogen and oxygen production device is 800-900°C, and the operating pressure is 4-5MPa.

[0021] Furthermore, the high-temperature helium output by the nuclear reactor has a pressure of 7-8 MPa and a temperature of 900-1000°C.

[0022] Furthermore, the temperature of the low-pressure helium output by the first gas turbine is 600-700°C.

[0023] Furthermore, the temperature of the low-temperature and low-pressure helium discharged from the steam generator to the first compressor is 300-400°C, and the temperature rises to 350-450°C after being compressed by the first compressor.

[0024] Furthermore, a high-temperature reducing atmosphere is sprayed from the lower part of the hydrogen-rich blast furnace body or the furnace waist, and the gas pipeline and the gas flow distribution device in the furnace use GH3536 nickel-based alloy.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1. The present invention uses high-temperature helium generated by nuclear energy as an inert atmosphere, which is safer than other gas fuels, and uses new Al-containing 310S austenitic stainless steel and GH3536 nickel-based alloy as high-temperature pipeline materials and devices, which can effectively improve the service life of pipelines, reactors and heaters;

[0027] 2. The present invention can utilize the high-temperature hydrogen and oxygen generated by nuclear energy in the blast furnace-converter process, and the blast furnace gas washing wastewater generated by the blast furnace can be recycled in the nuclear energy hydrogen production process, thereby realizing a complementary cycle of resources;

[0028] 3. The present invention makes full use of nuclear power technology and slag waste heat power generation technology to reduce part of the power supply cost. It can even use part of the electricity in other areas of the factory to improve the economic benefits of the steel plant.

[0029] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a comprehensive circulation system of nuclear power generation and heat supply coupled with a hydrogen-rich blast furnace-converter according to the present invention.

[0031] Description of reference numerals:

[0032] 1-Nuclear reactor 2-First steam turbine 3-First generator 4-Steam generator 5-First compressor 6-First pressure reducing valve 7-Second steam turbine 8-Second generator 9-Condenser 10-Condensate pump 11-Low-pressure heater 12-Deoxidizer 13-Feedwater pump 14-High-pressure heater 15-Second pressure reducing valve 16-Iodine-sulfur cycle hydrogen and oxygen production device 17-Mixing chamber 18-High-temperature low-pressure heat exchanger 19-Temperature control system 20-Hydrogen-rich blast furnace 21-Converter 22-Slag waste heat recovery device 23-Third generator 24-Top gas purification device (241-Desulfurization tower 242-Capture tower 243-Regeneration tower) 25-Dust collector 26-Top gas dechlorination and desulfurization wastewater treatment device 27-Second compressor 28-Carbon dioxide storage tank DETAILED DESCRIPTION

[0033] The following describes several preferred embodiments of the present invention with reference to the drawings in the specification, so that the technical content is clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0034] The present invention discloses a comprehensive cycle system for nuclear power generation and heat supply coupled with a hydrogen-rich blast furnace-converter, comprising a nuclear power generation system, a nuclear hydrogen production heat cycle system, and a hydrogen-rich blast furnace-converter system; wherein the nuclear power generation system generates electricity through a high-temperature helium Brayton / Rankine cycle and outputs water vapor to the nuclear hydrogen production heat cycle system, the nuclear hydrogen production heating cycle system undergoes a thermochemical reaction to produce hydrogen and oxygen, the hydrogen is heated in the nuclear heating cycle system using thermal energy and electrical energy, the oxygen releases waste heat in the nuclear heating cycle system, and the high-temperature hydrogen and low-temperature oxygen are input into the hydrogen-rich blast furnace-converter system as a reducing oxidizing atmosphere after thermal energy conversion.

[0035] like Figure 1 As shown, the nuclear power generation system includes a nuclear reactor 1, a first steam turbine 2, a first generator 3, a steam generator 4, a first compressor 5, a second steam turbine 7, a second generator 8, a condenser 9, a condensate pump 10, a low-pressure heater 11, a deoxidizer 12, a feed water pump 13, and a high-pressure heater 14.

[0036] The nuclear energy hydrogen production thermal cycle system includes a first pressure reducing valve 6, a second pressure reducing valve 15, an iodine-sulfur cycle hydrogen and oxygen production device 16, a gas mixing chamber 17, a high-temperature low-pressure heater 18, and a temperature control system 19.

[0037] The nuclear reactor 1 outputs high-temperature helium with a temperature of 900-1000°C and a pressure of 7-8MPa. The high-temperature helium pipeline material is made of 310S austenitic stainless steel containing Al, which is respectively input to the first steam turbine 2 of the nuclear power generation system and the second pressure reducing valve 15 of the nuclear hydrogen production thermal cycle system.

[0038] Part of the high-temperature helium introduced into the nuclear power generation system expands in the first steam turbine 2 to do work and drive the first generator 3 to generate electricity. The first steam turbine 2 outputs low-pressure helium to the steam generator 4. The temperature of the low-pressure helium after the low-pressure helium output by the first steam turbine 2 and the low-pressure helium circulated by the nuclear energy hydrogen production heat cycle system is 600-700°C; the low-pressure helium converts the heat energy in the Rankine cycle of the steam generator 4 into industrial water and sends it to the second steam turbine 7, and discharges low-temperature low-pressure helium with a temperature of 300-400°C to the first compressor 5, and passes the low-pressure and low-temperature helium through the first compressor 5, and the helium with a temperature of 350-450°C after compression is input into the nuclear reactor 1.

[0039] Industrial water after heat exchange with low-pressure helium is heated to the steam generator 4 to form water vapor. Part of the water vapor is introduced by the second steam turbine 7 to the first pressure reducing valve 6 of the nuclear energy hydrogen production thermal cycle system for pressure reduction and then sent to the iodine-sulfur cycle hydrogen production and oxygen production device 16; the remaining water vapor expands in the second steam turbine 7 to drive the second generator 8 to generate electricity and then enters 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 cycle system. The condensate output by the condenser 9 passes through the condensate pump 10 and, combined with the industrial wastewater provided by the hydrogen-rich blast furnace-converter system, enters the pipe side of the steam generator 4 through the low-pressure heater 11, the deaerator 12, the feed water pump 13, and the high-pressure heater 14 in sequence to serve as the feed water for the Rankine cycle.

[0040] The nuclear reactor 1 outputs the remaining high-temperature helium to the second pressure reducing valve 15 for pressure reduction, and together with the water vapor after the pressure reduction of the second pressure reducing valve 6, provides the required heat energy for the iodine-sulfur cycle hydrogen production and oxygen production device 16 with an operating temperature of 800-900°C and a working pressure of 4-5MPa. The high-temperature water vapor also plays the role of replenishing the water required for the thermochemical reaction of the iodine-sulfur cycle hydrogen production and oxygen production device 16. The iodine-sulfur cycle hydrogen production and oxygen production device 16 undergoes a thermochemical reaction to produce high-temperature hydrogen and oxygen, including:

[0041] Bunsen reaction (20~120℃): IS+SO2+2H2O→2HI+H2SO4

[0042] Sulfuric acid decomposition reaction (800-900°C): 2HI→I2+H2

[0043]

[0044] Among them, considering the problems of high temperature and acid corrosion, the iodine-sulfur cycle hydrogen and oxygen production device 16 and its pipelines are made of 310S austenitic stainless steel containing Al; the high-temperature hydrogen produced enters the mixing chamber 17 and forms a high-temperature reducing atmosphere with the coke oven gas and the carbon monoxide produced by the top gas purification device 24 of the hydrogen-rich blast furnace-converter system, which is electrically heated by the second pressure reducing valve 15 and the temperature control system 19 to 1000-1100°C high-temperature helium in the GH3536 nickel-based alloy high-temperature low-pressure heater 18 to achieve After the heat energy exchange raises the temperature to 950-1050℃, it enters the hydrogen-rich blast furnace-converter system, and the low-temperature helium after transferring the heat energy drops to 750-850℃, and merges with the low-temperature helium with a temperature of 300-500℃ after the heat energy loss through the iodine-sulfur cycle hydrogen and oxygen production device 16, and finally forms helium with a temperature of 600-700℃ and enters the 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, realizes heat energy conversion, and then is input into the hydrogen-rich blast furnace-converter system for recycling.

[0045] The hydrogen-rich blast furnace-converter system includes a hydrogen-rich blast furnace 20, a converter 21, a slag waste heat recovery device 22, a third generator 23, a top gas purification device 24, a dust collector 25, a top gas dechlorination and desulfurization wastewater treatment device 26, a second compressor 27, and a carbon dioxide storage tank 28.

[0046] The high-temperature reducing atmosphere generated by the nuclear energy hydrogen production thermal cycle system is injected from the lower part of the furnace body or the waist of the hydrogen-rich blast furnace 20, and the gas pipeline and the gas flow distribution device in the furnace are made of GH3536 nickel-based alloy; the hydrogen-rich blast furnace 20 undergoes a reduction reaction to produce molten iron that enters the converter 21, and low-temperature oxygen enters the hydrogen-rich blast furnace 20 and the converter 21 to undergo an oxidation reaction to produce product steel. At the same time, the slag waste heat is utilized to pass through the slag waste heat recovery device 22, and the Carona cycle power generation system is adopted to realize the conversion of heat energy and electrical energy, so that the third generator 23 generates electricity to do work for the furnace top gas purification device 24 and the furnace top gas dechlorination and desulfurization wastewater treatment device 26.

[0047] The top gas generated by the reduction-oxidation reaction of the hydrogen-rich blast furnace 20 passes through the dust collector 25 and the top gas purification device 24 in sequence, and then the remaining harmless gas components are discharged into the air;

[0048] The top gas input top gas purification device 24 includes a desulfurization tower 241, a capture tower 242, and a regeneration tower 243; the desulfurization tower 241 is connected to the capture tower 242, the dust collector 25, and the top gas dechlorination and desulfurization wastewater treatment device 26, the top gas dechlorination and desulfurization wastewater treatment device 26 is connected to the condensate pump 10, the capture tower 242 is connected to the regeneration tower 243 and the gas mixing chamber 17, and the regeneration tower 243 is connected to the second compressor 27;

[0049] The top gas after the dust collector 25 passes through the desulfurization tower 241 to remove toxic atmospheres such as hydrogen chloride, carbonyl sulfide, and hydrogen sulfide. The resulting top gas washing wastewater is treated by the top gas dechlorination and desulfurization wastewater treatment device 26 and then enters the condensate pump 10 to be used as industrial water for the Rankine cycle to achieve circulation; the initially purified top gas is further passed through the capture tower 242 to capture carbon monoxide and input into the mixing chamber 17 for circulation adjustment and replenishment of the reducing atmosphere; finally, the top gas that has been purified again is passed through the regeneration tower 243 to extract carbon dioxide, and the extracted carbon dioxide is input into the second compressor 27 for compression and stored in the carbon dioxide storage tank 28 for use in other industries, and finally the finally purified and harmless top gas is discharged.

[0050] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in the field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A comprehensive cycle system of nuclear power generation and heat supply coupled with hydrogen-rich blast furnace-converter, characterized in that: It includes a nuclear power generation system, a nuclear hydrogen production thermal cycle system, and a hydrogen-rich blast furnace-converter system; wherein the nuclear power generation system generates electricity through a high-temperature helium Brayton / Rankine cycle and outputs water vapor to the nuclear hydrogen production thermal cycle system, the nuclear hydrogen production heating cycle system undergoes a thermochemical reaction to produce hydrogen and oxygen, the hydrogen is heated in the nuclear heating cycle system, the oxygen releases heat in the nuclear heating cycle system, and the high-temperature hydrogen and low-temperature oxygen are input into the hydrogen-rich blast furnace-converter system after achieving thermal energy conversion; wherein: The nuclear power generation system includes a nuclear reactor, a first steam turbine, a first generator, a steam generator, a first compressor, a second steam turbine, a second generator, a condenser, a condensate pump, a low-pressure heater, a deaerator, a feed water pump, and a high-pressure heater; High-temperature helium is output from the nuclear reactor to the first steam turbine and the nuclear energy hydrogen production thermal cycle system; the high-temperature helium expands in the first steam turbine to drive the first generator to generate electricity, and the first steam turbine outputs low-pressure helium to the steam generator; the low-pressure helium converts heat energy into industrial water in the Rankine cycle in the steam generator and sends it to the second steam turbine, and the low-pressure and low-temperature helium is compressed by the first compressor and then used as reactor coolant again and input into the nuclear reactor cycle; The second steam turbine introduces part of the water vapor into the nuclear energy hydrogen production thermal cycle system; the water vapor expands in the second steam turbine to drive the second generator to generate electricity, and then enters the condenser. The electric energy generated by the second generator is input into the nuclear energy hydrogen production thermal cycle system. The condensate output by the condenser passes through the condensate pump, and is combined with the industrial wastewater provided by the hydrogen-rich blast furnace-converter system. It passes through the low-pressure heater, deaerator, feed water pump, and high-pressure heater in sequence and enters the steam generator tube side to remove oxygen and other gases in the water, and then serves as part of the feed water for the steam Rankine cycle; The nuclear energy hydrogen production thermal cycle system includes a first pressure reducing valve, a second pressure reducing valve, an iodine-sulfur cycle hydrogen 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 the second pressure reducing valve, and together with part of the water vapor drawn out from the second steam turbine to the second pressure reducing valve, the pressure is reduced to the working pressure of the iodine-sulfur cycle hydrogen production and oxygen production device. The output high-temperature helium and high-temperature water vapor together provide thermal energy for the iodine-sulfur cycle hydrogen production and oxygen production device, and the high-temperature water vapor supplements the water vapor required for the thermochemical reaction of the iodine-sulfur cycle hydrogen production and oxygen production device. The iodine-sulfur cycle hydrogen production and oxygen production device undergoes a thermochemical reaction to produce high-temperature hydrogen and oxygen; the produced high-temperature hydrogen enters the gas mixing chamber to form a high-temperature reducing atmosphere with the coke oven gas and the carbon monoxide produced by the hydrogen-rich blast furnace-converter system, and the high-temperature helium with stable pressure and temperature through the second pressure reducing valve and the temperature control system realizes heat energy exchange in the 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, realizes heat energy conversion, and then is input into the hydrogen-rich blast furnace-converter system; The hydrogen-rich blast furnace-converter system includes a hydrogen-rich blast furnace, a converter, a slag waste heat recovery device, a third generator, and a furnace top gas purification device; the furnace top gas purification device includes a desulfurization tower, a capture tower, a regeneration tower, a dust collector, a furnace top gas dechlorination and desulfurization wastewater treatment device, a second compressor, and a carbon dioxide storage tank; The high-temperature reducing atmosphere generated undergoes a reduction reaction through the hydrogen-rich blast furnace, producing molten iron that enters the converter, and low-temperature oxygen enters the hydrogen-rich blast furnace and the converter to undergo an oxidation reaction to produce product steel. At the same time, the slag waste heat is used to pass through the slag waste heat recovery device, and the Carona cycle power generation system is used to achieve heat and electrical energy conversion, so that the third generator generates electricity and does work for the furnace top gas purification device and the furnace top gas dechlorination and desulfurization wastewater treatment device; The top gas discharged from the hydrogen-rich blast furnace passes through the dust collector and then enters the top gas purification device, and then enters the desulfurization tower, capture tower, and regeneration tower in sequence, and then the remaining gas components are discharged into the air; The top gas is input into the desulfurization tower of the top gas purification device, and the blast furnace gas washing wastewater is output into the condensate pump circulation to provide the industrial water required by the iodine-sulfur circulation hydrogen and oxygen production device; The capture tower captures carbon monoxide and inputs it into the gas mixing chamber for circulation to supplement the reducing atmosphere; The regeneration tower extracts carbon dioxide and inputs it into the second compressor and the carbon dioxide storage tank.

2. The nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system according to claim 1, wherein: The nuclear reactor is a modular high-temperature gas-cooled reactor with a graphite reflector and helium coolant flowing through the core from the top of the reactor.

3. The nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system according to claim 1, wherein: The high-temperature and low-pressure heater is a shell and tube heat exchanger, the shell side working fluids are helium and reducing atmosphere, and GH3536 nickel-based alloy is used.

4. The nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system according to claim 1, wherein: The high-temperature helium pipeline material is 310S austenitic stainless steel containing Al.

5. The nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system according to claim 1, wherein: The iodine-sulfur cycle hydrogen and oxygen production device and its pipelines are made of Al-containing 310S austenitic stainless steel.

6. The nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system according to claim 1, wherein: The operating temperature of the iodine-sulfur cycle hydrogen and oxygen production device is 800-900℃ and the working pressure is 4-5MPa.

7. The nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system according to claim 1, wherein: The high-temperature helium output by the nuclear reactor has a pressure of 7-8MPa and a temperature of 900-1000℃.

8. The nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system according to claim 1, wherein: The temperature of the low-pressure helium output by the first gas turbine is 600-700°C.

9. The nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system according to claim 1, wherein: The temperature of the low-temperature and low-pressure helium discharged from the steam generator to the first compressor is 300-400°C, and the temperature rises to 350-450°C after being compressed by the first compressor.

10. The nuclear power generation and heat supply coupled hydrogen-rich blast furnace-converter integrated cycle system according to claim 1, wherein: The high-temperature reducing atmosphere is sprayed from the lower part of the hydrogen-rich blast furnace or the furnace waist, and the gas pipeline and the gas flow distribution device in the furnace are made of GH3536 nickel-based alloy.

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