Device for producing hydrogen through thermochemical sulfur-iodine circulating water decomposition in pressurized water reactor environment

Abstract

The invention provides a thermochemical sulfur-iodine circulating water decomposition hydrogen production device in a pressurized water reactor environment, which comprises a pressurized water reactor heat supply loop system, a water circulation loop system and a hydrogen production system, the pressurized water reactor heat supply loop system comprises a reactor, a pressure stabilizer and a steam generator, the water circulation loop system comprises a steam-water separator, a steam turbine and a condenser, and the steam-water separator is connected with the steam turbine. A steam output end of the steam-water separator is connected with the steam turbine, a low-pressure output port of the steam turbine is connected with the hydrogen production system, and the hydrogen production system is connected with the steam turbine and the condenser. The nuclear energy technology, the offshore wind power technology and the hydrogen production technology are combined together, large-scale production of hydrogen production through decomposition of thermochemical sulfur-iodine circulating water is facilitated, the energy utilization efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen production by decomposition of sulfur-iodine circulating water, and in particular relates to a thermochemical hydrogen production device by decomposition of sulfur-iodine circulating water in a pressurized water reactor environment. Background Art

[0003] Nuclear energy is a representative of high efficiency, low consumption, environmental protection and cleanliness. It has the advantages of not producing greenhouse gases, using water as raw material, high efficiency and large scale. If nuclear energy technology, offshore wind power technology and hydrogen production technology are integrated for large-scale production of hydrogen, it is expected to become an important solution for large-scale supply of hydrogen in the future, opening up a new path for long-term sustainable development.

[0004] Sulfur-iodine circulating water decomposition to produce hydrogen is an ideal hydrogen production method with zero greenhouse gas emissions. The highest heat source temperature in the entire process is much lower than the heat source temperature required for direct high-temperature pyrolysis of water. The reaction is relatively mild and the process operation is easy to implement. The integration of sulfur-iodine circulating water decomposition to produce hydrogen technology with nuclear energy technology and offshore wind power technology is expected to become the development direction of hydrogen production technology. Summary of the invention

[0005] In order to solve the problems in the prior art, the present invention provides a thermochemical sulfur-iodine circulating water decomposition hydrogen production device in a pressurized water reactor environment, which combines nuclear energy technology, offshore wind power and hydrogen production technology to carry out large-scale production of hydrogen and improve hydrogen production efficiency.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] The object of the present invention is to provide a thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment, comprising a pressurized water reactor heating circuit system, a water circulation circuit system and a hydrogen production system.

[0008] The pressurized water reactor heat supply loop system includes a reactor, a pressurizer and a steam generator, wherein the reactor, the pressurizer and the steam generator are connected in sequence to form a loop, and the steam generator is connected to the water circulation loop system and the hydrogen production system;

[0009] The water circulation loop system comprises a steam-water separator, a steam turbine and a condenser, wherein the steam output end of the steam-water separator is connected to the steam turbine, the low-pressure output port of the steam turbine is connected to the hydrogen production system, the steam turbine is connected to the generator, and the condenser is connected to the steam generator;

[0010] The hydrogen production system is connected to the steam turbine and the condenser, and the hydrogen production system includes a Bunsen reactor, the Bunsen reactor is connected to a phase separator, and the upper end of the phase separator is connected to H 2 SO 4 The lower end of the purification tower is connected to the HI purification tower.2 SO 4 Purification tower passes through H 2 SO 4 After the concentration tower and heater I, it enters H 2 SO 4 Decomposer, the HI purification tower passes through the HI distillation tower and heater II and then enters the HI decomposer, the H 2 SO 4 The decomposer and HI decomposer are connected to the separation and purification tower I and the separation and purification tower II respectively. The SO 2 , H 2 O returns to the Bunsen reactor to participate in the reaction, and the I discharged from the separation and purification tower II 2 , H 2 O returns to the Bunsen reactor to participate in the reaction, and the high-purity H 2 Entering the hydrogen storage tank, the O discharged from the separation and purification tower I 2 Enter the oxygen tank;

[0011] The steam from the low-pressure output port of the steam turbine is connected to the Bunsen reactor, the HI purification tower, and the H 2 SO 4 Purification tower, H 2 SO 4 concentration tower, HI distillation tower, the steam generated by the steam generator is the Bunsen reactor, HI purification tower, H 2 SO 4 Purification tower, H 2 SO 4 The concentration tower and HI distillation tower provide heat, and the condenser is connected to the Bunsen reactor to provide water for the reaction;

[0012] The heater I and the heater II are connected to the offshore wind power system, and the heater I is used to 2 SO 4 The decomposer is heated by the heater II.

[0013] Furthermore, the Bunsen reactor is provided with four inlets, namely SO 2 Return port, I 2 A return port, a steam inlet, and a cold water inlet, wherein the steam inlet is connected to the low-pressure output port of the steam turbine, and the cold water inlet is connected to the condenser.

[0014] Furthermore, a flow meter I and a regulating valve I are provided on the steam pipeline between the steam inlet and the low-pressure output port of the steam turbine, and a flow meter II and a regulating valve II are provided on the cold water pipeline between the cold water inlet and the condenser.

[0015] Furthermore, the low-pressure output port of the steam turbine is connected to the Bunsen reactor, the phase separator, and the H 2 SO 4 Flow meters and regulating valves are provided between the steam inlets of the concentration tower and the HI distillation tower.

[0016] Furthermore, thermocouples are provided at the front and rear ends of the heater I and the heater II, respectively.

[0017] Furthermore, the heater I is arranged on the H 2 SO 4 Concentration tower and H 2 SO 4 The heater II is arranged on the liquid infusion pipeline between the HI distillation tower and the HI decomposer.

[0018] Furthermore, the HI purification tower, H 2 SO 4 Purification tower, H 2 SO 4 The concentration tower and the HI distillation tower are also provided with a condensing device, which is connected to the condenser, and provides cooling water through the condenser and then returns to the condenser for condensation.

[0019] Furthermore, the power output end of the low-pressure section of the steam turbine is connected to a generator, and the generator is connected to a power grid.

[0020] Furthermore, the steam generator, steam-water separator, steam turbine and condenser are interconnected to form a loop.

[0021] Furthermore, the condenser is also connected to a cooling tower, and the cooling tower provides a cold source for the condenser.

[0022] Furthermore, a water feed pump is provided between the condenser and the steam generator.

[0023] Furthermore, the coolant is pumped into the reactor through a coolant pump.

[0024] Furthermore, the steam-water separator, steam turbine, HI purification tower, H 2 SO 4 Purification tower, H 2 SO 4 The concentration tower and the HI distillation tower are connected to the condenser, and the crystal water and low-temperature steam in the steam-water separator and the steam turbine enter the condenser for condensation.

[0025] Compared with the prior art, the beneficial technical effects of the present invention are:

[0026] The nuclear energy of the present invention, as a clean primary energy source, has the advantages of high efficiency, cleanliness and stability. It combines nuclear energy technology, offshore wind power technology and hydrogen production technology together, which is conducive to the large-scale production of hydrogen production by thermochemical sulfur-iodine circulating water decomposition, improves energy utilization efficiency and reduces hydrogen production costs. In the present invention, the pressurized water reactor heating loop system, the water circulation loop system and the hydrogen production system are all closed loops, which avoids energy waste, saves energy consumption, and allows materials to be recycled, greatly reducing production costs.

[0027] The present invention uses a pressurized water reactor to generate electricity, and takes advantage of the stable geographical location of the pressurized water reactor near the sea to draw a portion of water vapor from the low-pressure outlet of the steam turbine in the pressurized water reactor heating circuit and the water circulation circuit as the main heat source of the hydrogen production system. At the same time, the offshore wind power system near the sea is used to power the multi-stage heater, so that H 2 SO 4 , the heat supply during HI decomposition is more stable, and the decomposition efficiency is improved. The present invention introduces reactor heating and offshore wind power system power supply to the entire hydrogen production system, without the need to set up a separate heating device. The arrangement is performed without changing the original power grid system and offshore wind power system structure, so that resources can be better utilized and construction costs can be saved.

[0028] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a flow chart of a device for producing hydrogen by thermochemical sulfur-iodine circulating water decomposition in a pressurized water reactor environment according to the present invention.

[0030] In the figure, 1 is a pressurized water reactor heating circuit system, 2 is a water circulation circuit system, 3 is a hydrogen production system, 101 is a reactor, 102 is a steam generator, 103 is a coolant pump, 104 is a stabilizer, 201 is a steam-water separator, 202 is a steam turbine, 203 is a generator, 204 is a power grid, 205 is a condenser, 206 is a feed water pump, 207 is a circulating water pump, 301 is a Bunsen reactor, 302 is a phase separator, 303 is an HI purification tower, 304 is an HI distillation tower, 305 is H 2 SO 4 Purification tower, 306 is H 2 SO 4 Concentration tower, 307 is H 2 SO 4Decomposer, 308 is separation and purification tower I, 309 is HI decomposer, 310 is separation and purification tower II, 311 is offshore wind power system, 312 is heater I, 313 is heater II, 314 is flow meter I, 315 is regulating valve I, 316 is regulating valve II, 317 is flow meter II, and 318 is thermocouple. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following embodiments are only exemplary illustrations and explanations of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are included in the scope of protection that the present invention is intended to protect.

[0032] In addition, unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0033] A thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment comprises a pressurized water reactor heating loop system 1, a water circulation loop system 2 and a hydrogen production system 3,

[0034] The pressurized water reactor heat supply loop system 1 includes a reactor 101, a pressurizer 104 and a steam generator 102. The reactor 101, the pressurizer 104 and the steam generator 102 are connected in sequence to form a loop. The steam generator 102 is connected to the water circulation loop system 2 and the hydrogen production system 3.

[0035] The water circulation loop system 2 includes a steam-water separator 201, a steam turbine 202, and a condenser 205. The steam output end of the steam-water separator 201 is connected to the steam turbine 202, the low-pressure output port of the steam turbine 202 is connected to the hydrogen production system 3, the steam turbine 202 is connected to the generator 203, and the condenser 205 is connected to the steam generator 102;

[0036] The hydrogen production system 3 is connected to the steam turbine 202 and the condenser 205. The hydrogen production system includes a Bunsen reactor 301. The Bunsen reactor 301 is connected to a phase separator 302. The upper end of the phase separator 302 is connected to the H 2 SO 4 The purification tower 305 is connected to the HI purification tower 303 at the lower end. 2 SO 4 Purification tower 305 passes through H 2 SO 4 After the concentration tower 306 and the heater I 312, the H 2 SO 4 Decomposer 307, HI purification tower 303 passes through HI distillation tower 304 and heater II 313 and then enters HI decomposer 309, H 2 SO 4The decomposer 307 and the HI decomposer 309 are connected to the separation and purification tower I 308 and the separation and purification tower II 310 respectively. The SO 2 , H 2 O returns to the Bunsen reactor 301 to participate in the reaction, and I outflowing from the separation and purification tower II 310 2 , H 2 O returns to the Bunsen reactor 301 to participate in the reaction, and the high-purity H flowing out of the separation and purification tower II 310 2 Enter the hydrogen storage tank, separate and purify the O out of tower I 308 2 Enter the oxygen tank;

[0037] The steam from the low pressure outlet of the steam turbine 202 is connected to the Bunsen reactor 301, the HI purification tower 303, and the H 2 SO 4 Purification tower, H 2 SO 4 The steam generated by the steam generator 102 is used for the Bunsen reactor 301, the HI purification tower 303, and the H 2 SO 4 Purification tower, H 2 SO 4 The concentration tower and HI distillation tower 304 provide heat, and the condenser 205 is connected to the Bunsen reactor 301 to provide water for the reaction;

[0038] Heater I 312 and heater II 313 are connected to the offshore wind power system 311, and the heater I 312 is used to heat H 2 SO 4 The decomposer 307 supplies heat, and the heater II 313 supplies heat to the HI decomposer 309 .

[0039] The present invention converts nuclear energy into thermal energy through the heat supply loop system 1, and uses the waste heat of steam to provide thermal energy for the hydrogen production system while generating electricity for the power grid 204. 2 SO 4 The stable heat required for decomposition and HI decomposition is 2 SO 4 The decomposer 307 and the HI decomposer 309 are heated by an offshore wind power system 311. The present invention combines nuclear energy, offshore wind power and sulfur-iodine circulating water decomposition hydrogen production, and utilizes the waste heat generated by the pressurized water reactor and the electric energy of the offshore wind power system 311 to convert into thermal energy to provide thermal energy for the hydrogen production system, thereby saving a lot of energy and facilitating the large-scale production of sulfur-iodine circulating water decomposition hydrogen production. A part of the steam generated by the steam generator 102 is drawn out from the low-pressure output port of the steam turbine 202 to the Bunsen reactor 301, the HI purification tower 303, and the H 2 SO 4Purification tower 305, H 2 SO 4 Concentration tower 306, HI distillation tower 304, Bunsen reactor 301, HI purification tower 303, H 2 SO 4 Purification tower 305, H 2 SO 4 The condensed water generated in the heat energy transport process provided by the concentration tower 306 and the HI distillation tower 304 is transferred to the condenser 205 for condensation. The water in the condenser 205 not only plays a condensation role, but also provides steam water for the steam generator 102, provides reaction water for the Bunsen reactor 301, and replenishes water to the condenser 205 in time. 2 SO 4 The offshore wind power system 311 is used to heat the heater I 312 and the heater II 313 before the decomposer 307 and the HI decomposer 309, as H 2 SO 4 , HI decomposes the heat source, not only the temperature is easy to control, but also the heat is more stable.

[0040] The Bunsen reactor 301 is provided with four inlets, namely SO 2 Return port, I 2 The return port, steam inlet, and cold water inlet are connected to the low-pressure output port of the steam turbine 202, and the cold water inlet is connected to the condenser 205. The Bunsen reactor 301 is provided with two outlets, namely, the reaction product outlet and the condensed water outlet. 2 ,I 2 , water are mixed and reacted in the Bunsen reactor 301, and the steam output from the low-pressure output port of the turbine 202 provides heat for the reaction.

[0041] In order to better control the reaction temperature, a flow meter I 314 and a regulating valve I 315 are provided on the steam pipeline between the steam inlet and the low-pressure output port of the steam turbine 202, and a flow meter II 317 and a regulating valve II 316 are provided on the cold water pipeline between the cold water inlet and the condenser 205. 2 SO 4 Flow meters and regulating valves are provided between the steam inlets of the concentration tower 306 and the HI distillation tower 304 .

[0042] Thermocouples 318 are provided at the front and rear ends of heater I 312 and heater II 313. Thermocouples 318 in front of heater I 312 and heater II 313 are used to monitor H 2 SO 4The temperature of the material output from the concentration tower 306 and the HI distillation tower 304, the thermocouple 318 behind the heater I 312 and the heater II 313 is used to monitor the H 2 SO 4 The temperature at which the decomposer 307 and the HI decomposer 309 react.

[0043] Heater I312 is set at H 2 SO 4 Concentration tower 306 and H 2 SO 4 On the liquid delivery pipeline between the decomposers 307 , the heater II 313 is arranged on the liquid delivery pipeline between the HI distillation tower 304 and the HI decomposer 309 .

[0044] HI purification tower 303, H 2 SO 4 Purification tower 305, H 2 SO 4 The concentration tower 306 and the HI distillation tower 304 are also provided with a condensing device, which is connected to the condenser 205, and the cooling water provided by the condenser 205 is returned to the condenser 205 for condensation. The condensing device plays a condensing role, and the water in the condenser 205 is condensed by the condensing device and then returned to the condenser 205 from the condensing device.

[0045] The power output end of the low-pressure section of the steam turbine 202 is connected to the generator 203 , and the generator 203 is connected to the power grid 204 .

[0046] The steam generator 102, the steam-water separator 201, the steam turbine 202, and the condenser 205 are interconnected to form a loop.

[0047] The condenser 205 is also connected to a cooling tower, which provides a cold source for the condenser 205 . A circulating water pump 207 is provided between the condenser 205 and the cooling tower, and the circulating water pump 207 is used to circulate the cooling water in the condenser 205 .

[0048] A feed water pump 206 is provided between the condenser 205 and the steam generator 102 .

[0049] The coolant is pumped into the reactor 101 through the coolant pump 103 .

[0050] Steam-water separator 201, steam turbine 202, HI purification tower 303, H 2 SO 4 Purification, 305, H 2 SO 4 The concentration tower 306 and the HI distillation tower 304 are connected to the condenser 205, and the crystal water and low-temperature steam in the steam-water separator 201 and the steam turbine 202 enter the condenser 205 for condensation.

[0051] The working process of the thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment of the present invention is as follows:

[0052] In the power generation part: There are two loops in the power generation part, namely the pressurized water reactor heating loop system 1 and the water circulation loop system 2. The pressurized water reactor heating loop system 1 is that the coolant pump 103 pumps the coolant into the reactor 101, and forms steam under the action of nuclear energy in the reactor 101, generates heat, converts nuclear energy into thermal energy, and transfers the heat to the steam generator 102. The cooled water returns to the coolant storage tank through the steam generator 102 and returns to the reactor 101 again. The water circulation loop system 2 is that the steam in the steam generator 102 is transported to the steam turbine 202, so that the steam turbine 202 works, converts thermal energy into kinetic energy, and converts it into electrical energy through the generator 203, and supplies the power grid 204. The steam output from the steam turbine 202 enters the condenser 205 for condensation, and then the condensed cooling water is returned to the steam generator 102. At the same time, a part of the steam from the steam turbine 202 is separated and enters the hydrogen production system 3 for circulation. The steam turbine 202 is divided into three sections: a high-pressure section, a medium-pressure section, and a low-pressure section. The steam-water separator 201 is connected to the high-pressure section, and the high-temperature and high-pressure gas generated by the steam generator enters the high-pressure section of the steam turbine 202. The steam in the high-pressure section enters the medium-pressure section, and the water vapor in the medium-pressure section enters the low-pressure section of the steam turbine 202. The low-pressure section is connected to the engine and the hydrogen production system, and the steam in the low-pressure section is converted into kinetic energy of the steam turbine 202.

[0053] Hydrogen production part: SO 2 ,I 2 and H 2 O is injected into the Bunsen reactor 301 by adjusting the flow rate of the flow meter, and a reaction occurs in the Bunsen reactor 301 to generate H 2 SO 4 and HI, enter the phase separator 302, in which the excess I 2 The presence of HI in the phase separator 302 is divided into two layers, the lower layer with high density HI is discharged from the lower part to the HI purification tower 303 for purification, and the upper layer of HI 2 SO 4 Discharged from the top to H 2 SO 4 The purified HI is distilled in the HI distillation tower 304 to separate the HI and output it to the HI decomposer 309. 2 SO 4 After H 2 SO 4 The concentration tower 306 is concentrated and then output to H 2 SO 4 Decomposer 307. In H 2 SO 4 In the decomposer 307, H2 SO 4 Decompose into SO 2 , O 2 and H 2 O, HI is decomposed into H in HI decomposer 309 2 and I 2 Before decomposition, the offshore wind power system 311 is used to heat the liquid delivery pipeline to H through heater I 312 and heater II 313. 2 SO 4 and the decomposition temperature of HI, so that the decomposition reaction proceeds better. 2 SO 4 The material decomposed by the decomposer 307 is output to the separation and purification tower I 308 for separation and purification. 2 Collect and store, SO 2 and H 2 O returns to the Bunsen reactor 301 to participate in the reaction again; the material decomposed by the HI decomposer 309 is output to the separation and purification tower II 310 for separation and purification, and the separated H 2 Collect and store, 2 Return to the Bunsen reactor 301 to re-participate in the reaction and enter the next cycle.

[0054] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0055] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment, characterized in that: Including pressurized water reactor heating circuit system, water circulation circuit system and hydrogen production system, The pressurized water reactor heat supply loop system includes a reactor, a pressurizer and a steam generator, wherein the reactor, the pressurizer and the steam generator are connected in sequence to form a loop, and the steam generator is connected to the water circulation loop system and the hydrogen production system; The water circulation loop system comprises a steam-water separator, a steam turbine and a condenser, wherein the steam output end of the steam-water separator is connected to the steam turbine, the low-pressure output port of the steam turbine is connected to the hydrogen production system, the steam turbine is connected to the generator, and the condenser is connected to the steam generator; The hydrogen production system is connected to the steam turbine and the condenser, and the hydrogen production system includes a Bunsen reactor, the Bunsen reactor is connected to a phase separator, the upper end of the phase separator is connected to an H2SO4 purification tower, and the lower end is connected to an HI purification tower, the H2SO4 purification tower passes through an H2SO4 concentration tower and a heater I and then enters an H2SO4 decomposer, the HI purification tower passes through an HI distillation tower and a heater II and then enters an HI decomposer, the H2SO4 decomposer and the HI decomposer are respectively connected to a separation and purification tower I and a separation and purification tower II, the SO2 and H2O flowing out of the separation and purification tower I return to the Bunsen reactor to participate in the reaction, the I2 and H2O flowing out of the separation and purification tower II return to the Bunsen reactor to participate in the reaction, the high-purity H2 flowing out of the separation and purification tower II enters a hydrogen storage tank, and the O2 flowing out of the separation and purification tower I enters an oxygen storage tank; The steam from the low-pressure output port of the steam turbine is connected to the Bunsen reactor, HI purification tower, H2SO4 purification tower, H2SO4 concentration tower, and HI distillation tower. The steam generated by the steam generator is used to heat the Bunsen reactor, HI purification tower, H2SO4 purification tower, H2SO4 concentration tower, and HI distillation tower. The condenser is connected to the Bunsen reactor to provide a water source for the reaction. The heater I and the heater II are connected to an offshore wind power system, and the heater I is used to supply heat to the H2SO4 decomposer, and the heater II is used to supply heat to the HI decomposer.

2. A thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment as claimed in claim 1, characterized in that: The Bunsen reactor is provided with four inlets, namely, a SO2 return port, an I2 return port, a steam inlet, and a cold water inlet. The steam inlet is connected to the low-pressure output port of the steam turbine, and the cold water inlet is connected to the condenser.

3. A thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment as claimed in claim 2, characterized in that: A flow meter I and a regulating valve I are arranged on the steam pipeline between the steam inlet and the low-pressure output port of the steam turbine, and a flow meter II and a regulating valve II are arranged on the cold water pipeline between the cold water inlet and the condenser.

4. A thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment as claimed in claim 1, characterized in that: The heater I is arranged on the liquid infusion pipeline between the H2SO4 concentration tower and the H2SO4 decomposer, and the heater II is arranged on the liquid infusion pipeline between the HI distillation tower and the HI decomposer.

5. A thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment as claimed in claim 1, characterized in that: The HI purification tower, H2SO4 purification tower, H2SO4 concentration tower and HI distillation tower are also provided with a condensing device, which is connected to the condenser, and provides cooling water through the condenser and then returns to the condenser for condensation.

6. A thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment as claimed in claim 1, characterized in that: The power output end of the low-pressure section of the steam turbine is connected to a generator, and the generator is connected to a power grid.

7. A thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment as claimed in claim 1, characterized in that: The steam generator, steam-water separator, steam turbine and condenser are interconnected to form a loop.

8. A thermochemical sulfur-iodine circulating water decomposition hydrogen production device under a pressurized water reactor environment as claimed in claim 5, characterized in that: The steam-water separator, steam turbine, HI purification tower, H2SO4 purification tower, H2SO4 concentration tower, and HI distillation tower are connected to the condenser, and the crystal water and low-temperature steam in the steam-water separator and steam turbine enter the condenser for condensation.

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