A loop structure of fusion energy heat feed system

Abstract

The present invention relates to the technical field of fusion energy heat feed systems, and in particular to a loop structure of a fusion energy heat feed system. Its technical solution includes a blanket cooling loop and a divertor cooling loop; the blanket cooling loop includes a blanket, a main circulation pump 1, a steam generator, a heater, and a pressurizer 1 connected in sequence to form a loop; the main circulation pump 1 is connected in parallel with a baking low-flow pump 1, the steam generator is connected in parallel with a flow regulating valve 1 and a baking cooler 1, and the heater is connected in parallel with a flow regulating valve 2; the divertor cooling loop includes a divertor, a main circulation pump 2, a main heat exchanger, a baking low-flow pump 2, and a pressurizer 2 connected in sequence to form a loop. The present invention effectively solves the problem of high-temperature baking of internal components of a fusion reactor, realizes the safe, stable, and efficient output of fusion energy for power generation, alleviates energy shortages and environmental pollution, accelerates the practical application of nuclear fusion energy, and the system has multiple safety assurance mechanisms.

Description

Technical Field

[0001] The present invention relates to the technical field of fusion energy heat feeding systems, and in particular to a loop structure of a fusion energy heat feeding system. Background Art

[0002] Currently, energy for human activities primarily comes from fossil fuels, but these resources are limited in reserves and contribute to atmospheric pollution. Renewable energy sources (such as wind, solar, and tidal energy) are also limited by natural factors, leading to energy shortages and environmental pollution in all countries. Currently, the major tokamak experimental facilities under construction worldwide include the International Thermonuclear Experimental Reactor (ITER), Japan's JT-60SA, the European Union's JET, South Korea's K-Star, and China's EAST. However, these are only tokamaks for plasma experiments; fusion power plants capable of generating electricity are still in the research and development stage.

[0003] Fusion reactions occur in the deuterium-tritium plasma within the tokamak vacuum chamber. The divertor and blanket, as internal components directly facing the plasma, are subject to high-energy particle and heat fluxes from the central plasma. The thermal power on their first wall surfaces can reach gigawatts. The heat flux density on the blanket's first wall is projected to reach several megawatts per square meter, while the heat flux on the divertor's first wall facing the plasma could reach tens of megawatts per square meter. The fusion energy heat feed system transfers the heat load deposited on the blanket and divertor to the steam power generation system for power generation. It also provides high-temperature bakeout for the fusion reactor's vacuum chamber, creating the high vacuum environment necessary for plasma operation. An effective fusion energy heat feed system circuit structure is urgently needed to overcome the challenges of high-temperature bakeout of internal fusion reactor components and ensure the safe, stable, and efficient output of fusion energy for power generation, thereby accelerating the practical application of nuclear fusion.

[0004] In summary, the present application proposes a loop structure for a fusion energy heat feed system. Summary of the Invention

[0005] The purpose of the present invention is to address the problem in the background technology that there is no effective fusion energy heat feed system loop structure to overcome the high-temperature baking problem of internal components of fusion reactors, and to propose a fusion energy heat feed system loop structure.

[0006] The technical solution of the present invention is a fusion energy heat feed system loop structure, comprising:

[0007] Blanket cooling loop and divertor cooling loop;

[0008] The blanket cooling loop includes a blanket, a main circulation pump, a steam generator, a heater, and a pressure stabilizer connected in sequence to form a loop;

[0009] The main circulation pump is connected in parallel with a baking low flow pump, the steam generator is connected in parallel with a flow regulating valve and a baking cooler, and the heater is connected in parallel with a flow regulating valve.

[0010] The divertor cooling loop comprises a divertor, a second main circulation pump, a main heat exchanger, a second baking low flow pump, and a second pressure stabilizer, which are connected in sequence to form a loop;

[0011] The second baking low flow pump is respectively connected to a baking heater, a flow regulating valve 3 and a second baking cooler, and the baking heater, the flow regulating valve 3 and the second baking cooler are arranged in parallel and connected between the divertor and the second main circulation pump;

[0012] A pressure relief assembly is connected between the blanket cooling loop and the divertor cooling loop.

[0013] Optionally, safety isolation valve 1 and safety isolation valve 2 are connected in sequence between the cladding and main circulation pump 1, and stop valve 1 and stop valve 2 are connected in sequence between the main circulation pump 1 and the steam generator; stop valve 3 and stop valve 4 are connected in sequence between the steam generator and the heater; safety isolation valve 3 and safety isolation valve 4 are connected in sequence between the pressure stabilizer 1 and the cladding.

[0014] Optionally, a stop valve five is connected between the baking low-flow pump one and the stop valve two, and a stop valve six and a stop valve seven are respectively installed at both ends of the divertor.

[0015] Optionally, a safety isolation valve 5 and a safety isolation valve 6 connected in sequence are installed between the divertor and the main circulation pump 2, and a stop valve 8 is installed between the main circulation pump 2 and the main heat exchanger;

[0016] A safety isolation valve 7 and a safety isolation valve 8, which are connected in sequence, are installed between the pressurizer 2 and the divertor.

[0017] Optionally, a stop valve nine is installed between the baking low-flow pump two and the baking cooler two, and a stop valve ten is installed between the baking low-flow pump two and the baking heater.

[0018] Optionally, the pressure relief assembly includes a pressure relief box, the pressure relief box is respectively connected to pressure relief valve 1 and pressure relief valve 2, pressure stabilizer 1 is connected to pressure relief valve 1, and pressure relief valve 2 is connected to pressure stabilizer 2.

[0019] Optionally, the steam generator is connected to a main heat exchanger, the main heat exchanger is connected to a safety isolation valve nine and a safety isolation valve ten, and the steam generator is sequentially connected to a safety isolation valve eleven and a safety isolation valve twelve.

[0020] Optionally, the operating modes of the fusion energy heat feed system loop structure include power generation mode and baking mode.

[0021] Optionally, in the power generation mode, the safety isolation valve 1, the safety isolation valve 2, the stop valve 1, the stop valve 2, the stop valve 3, the stop valve 4, the safety isolation valve 3, and the safety isolation valve 4 in the blanket cooling loop are opened, and the stop valve 5, the stop valve 6, and the stop valve 7 are closed;

[0022] After the cooling water is heated by the blanket, part of it passes through the heater and part passes through the second flow regulating valve. After the water is merged, it passes through the steam generator to heat the secondary side feed water to generate steam, which is then sent to the steam turbine to drive the turbine to generate electricity.

[0023] It is then pressurized by main circulation pump 1 and re-injected into the blanket. When the fusion reactor is in unstable operation, the heater is turned on to heat the cooling water in order to generate steam to maintain the minimum speed of the turbine; the safety isolation valves 5, 6, 7 and 8 in the divertor cooling loop are opened, the stop valves 9 and 10 are closed, and the flow regulating valve 3 is closed. After the cooling water is heated by the divertor, it passes through the main heat exchanger to heat the high-pressure feed water on the secondary side, and then is pressurized and backfilled into the divertor by main circulation pump 2.

[0024] Optionally, the baking mode includes a baking heating mode and a baking cooling mode;

[0025] In the baking heating mode, in the blanket cooling loop, safety isolation valves 1, 2, 3, and 4 are opened, stop valves 4 and 5 are opened, stop valves 1, 2, 3, 6, and 7 are closed, flow regulating valve 1 is opened, and flow regulating valve 2 is closed. Cooling water is heated by the heater, passes through flow regulating valve 1, and then is pressurized by baking low-flow pump 1 before being injected into the blanket for high-temperature baking.

[0026] In the baking heating mode, the safety isolation valves 5, 6, 7, and 8 in the divertor cooling loop are opened, the stop valve 10 is opened, and the stop valve 9, the flow regulating valve 3, and the stop valve 8 are closed. The cooling water is pressurized by the baking low-flow pump 2, heated by the baking heater, and then enters the divertor for high-temperature baking.

[0027] In the baking cooling mode, the safety isolation valve 1, the safety isolation valve 2, the safety isolation valve 3, and the safety isolation valve 4 in the blanket cooling loop are opened, the stop valve 5, the stop valve 6, and the stop valve 7 are opened, the stop valve 1, the stop valve 2, the stop valve 3, and the stop valve 4 are closed, the flow regulating valve 1 and the flow regulating valve 2 are opened, and the cooling water is cooled by the baking cooler 1, pressurized by the baking low flow pump 1, and then injected into the blanket to cool it;

[0028] In the baking cooling mode, safety isolation valves 5, 6, 7 and 8 in the divertor cooling loop are opened, stop valve 9 and flow regulating valve 3 are opened, stop valve 10 and stop valve 8 are closed, and the cooling water is pressurized by baking low-flow pump 2, cooled by baking cooler 2 and then enters the divertor.

[0029] Compared with the prior art, this application has at least one of the following beneficial technical effects:

[0030] The fusion energy heat feed system of the present invention can effectively transfer the heat load deposited on the blanket and the divertor to the steam power generation system for power generation, thereby ensuring efficient recovery and utilization of energy.

[0031] The present invention can provide high-temperature baking for the fusion reactor vacuum chamber to form a high vacuum environment that satisfies plasma operation, which helps maintain the stable operation of the plasma and ensures the normal operation of the tokamak device.

[0032] The present invention adopts two independent cooling circuit structures including a blanket cooling circuit and a divertor cooling circuit, thereby improving the stability of the system and ensuring the reliability of fusion reactor cooling.

[0033] In power generation mode and non-steady-state operation mode, reasonable design of cooling water flow direction and valve control can buffer heat load fluctuations, reduce the impact on the turbine, and ensure the safety and stability of the system under different operating conditions.

[0034] By utilizing the heat load of the divertor to preheat the high-pressure feedwater from the steam power generation system, the high-quality thermal energy generated by the fusion reactor is fully utilized, improving energy efficiency. By optimizing equipment utilization in cooling and bakeout modes, such as bakeout of low-flow pumps, heaters, and coolers, existing equipment is maximized, improving equipment utilization and overall system efficiency.

[0035] After a loss of coolant (LOC) accident, properly designed safety isolation valve closure logic effectively limits the release of mass and energy, ensuring system safety. In the event of a steam generator or main heat exchanger piping rupture, the secondary safety isolation valve closes, preventing the leakage of radioactive corrosive materials and protecting personnel and the environment.

[0036] The pressure stabilizer ensures stable system pressure operation, absorbs changes in system water volume caused by temperature fluctuations, and prevents system failure due to pressure fluctuations. The pressure relief tank condenses high-temperature steam from the pressure stabilizer when the system is overpressured, ensuring safe system operation and preventing safety accidents caused by overpressure.

[0037] The present invention effectively solves the problem of high-temperature baking of internal components of fusion reactors, realizes the safe, stable and efficient output of fusion energy for power generation, alleviates energy shortages and environmental pollution, accelerates the practical application of nuclear fusion energy, and the system has multiple safety assurance mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural schematic diagram of a fusion energy heat feed system loop structure.

[0039] Figure numerals: 1, cladding; 2, safety isolation valve 1; 3, safety isolation valve 2; 4, main circulation pump 1; 5, stop valve 1; 6, stop valve 2; 7, steam generator; 8, stop valve 3; 9, stop valve 4; 10, heater; 11, safety isolation valve 3; 12, safety isolation valve 4; 13, regulator 1; 14, pressure relief valve 1; 15, pressure relief tank; 16, baking low flow pump 1; 17, stop valve 5; 18, stop valve 6; 19, flow regulating valve 1; 20, stop valve 7; 21, flow regulating valve 2; 22, baking cooler 1 ; 23. Divertor; 24. Safety isolation valve five; 25. Safety isolation valve six; 26. Main circulation pump two; 27. Main heat exchanger; 28. Safety isolation valve seven; 29. ​​Safety isolation valve eight; 30. Baking small flow pump two; 31. Stop valve nine; 32. Stop valve ten; 33. Baking heater; 34. Baking cooler two; 35. Flow regulating valve three; 36. Pressure stabilizer two; 37. Pressure relief valve two; 38. Safety isolation valve nine; 39. Safety isolation valve ten; 40. Safety isolation valve eleven; 41. Safety isolation valve twelve; 42. Stop valve eight. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] like Figure 1 As shown, the present invention proposes a fusion energy heat feed system loop structure, which includes two independent cooling loops: a blanket cooling loop and a divertor cooling loop. This can improve the stability of the system and ensure the reliability of fusion reactor cooling.

[0043] The blanket cooling loop includes blanket 1, main circulation pump 4, steam generator 7, heater 10, and pressurizer 13, connected in sequence to form a loop. A bakeout low-flow pump 16 is connected in parallel to main circulation pump 4, flow control valve 19 and bakeout cooler 22 are connected in parallel to steam generator 7, and flow control valve 21 is connected in parallel to heater 10. Safety isolation valve 1 and safety isolation valve 2 are connected in sequence between blanket 1 and main circulation pump 4, and shut-off valve 1 and shut-off valve 2 are connected in sequence between main circulation pump 4 and steam generator 7. Shut-off valve 3 and shut-off valve 4 are connected in sequence between steam generator 7 and heater 10. Safety isolation valve 3 and shut-off valve 4 are connected in sequence between pressurizer 13 and blanket 1. Shut-off valve 5 and shut-off valve 6 are connected in sequence between pressurizer 13 and blanket 1. Shut-off valve 5 and shut-off valve 7 are installed at both ends of divertor 23, respectively.

[0044] In addition, in this embodiment, the divertor cooling loop includes the divertor 23, the second main circulation pump 26, the main heat exchanger 27, the baking low-flow pump 30, and the second pressurizer 36, which are connected in sequence to form a loop. The baking low-flow pump 30 is respectively connected to the baking heater 33, the third flow regulating valve 35, and the second baking cooler 34. The baking heater 33, the third flow regulating valve 35, and the second baking cooler 34 are arranged in parallel and communicated between the divertor 23 and the second main circulation pump 26. The fifth safety isolation valve 24 and the sixth safety isolation valve 25, which are connected in sequence, are installed between the divertor 23 and the second main circulation pump 26. The eighth shut-off valve 42 is installed between the second main circulation pump 26 and the main heat exchanger 27.

[0045] Furthermore, a safety isolation valve seven 28 and a safety isolation valve eight 29 are installed in sequence between the stabilizer two 36 and the divertor 23, a stop valve nine 31 is installed between the baking low-flow pump 30 and the baking cooler two 34, and a stop valve ten 32 is installed between the baking low-flow pump 30 and the baking heater 33.

[0046] It is particularly noted that a pressure relief assembly is connected between the blanket cooling loop and the divertor cooling loop. This assembly includes a pressure relief tank 15, which is connected to pressure relief valve 14 and pressure relief valve 2 37, respectively. Pressure regulator 1 13 is connected to pressure relief valve 1 14, and pressure relief valve 2 37 is connected to pressure regulator 2 36.

[0047] Steam generator 7 is connected to main heat exchanger 27, to which safety isolation valve 9 38 and safety isolation valve 10 39 are connected. Safety isolation valve 11 40 and safety isolation valve 12 41 are also connected in sequence. The primary functions of pressure regulator 1 13 and pressure regulator 2 36 are to ensure stable system pressure operation and absorb changes in system water volume caused by temperature fluctuations. The primary function of pressure relief tank 15 is to condense high-temperature steam from pressure regulator 1 13 and pressure regulator 2 36 in the event of system overpressure, ensuring safe system operation.

[0048] The working modes of the fusion energy heat feed system loop structure include power generation mode and baking mode.

[0049] In power generation mode, the safety isolation valve 1 2, safety isolation valve 2 3, stop valve 1 5, stop valve 2 6, stop valve 3 8, stop valve 4 9, safety isolation valve 3 11, and safety isolation valve 4 12 in the blanket cooling loop are opened, and the stop valve 5 17, stop valve 6 18, and stop valve 7 20 are closed;

[0050] After the cooling water is heated by the blanket 1, part of it passes through the heater 10 and part of it passes through the flow control valve 21. After the water is combined, it passes through the steam generator 7 to heat the secondary side feed water to generate steam, which is then sent to the steam turbine to drive the turbine to generate electricity.

[0051] The cooling water is then pressurized by the main circulation pump 4 and then re-injected into the blanket 1. When the fusion reactor experiences unsteady-state operation, the heater 10 is turned on to heat the cooling water in order to generate steam to maintain the minimum speed of the turbine. The safety isolation valve 5 24, the safety isolation valve 6 25, the safety isolation valve 7 28, and the safety isolation valve 8 29 in the divertor cooling loop are opened, the stop valve 9 31 and the stop valve 10 32 are closed, and the flow regulating valve 3 35 is closed. The cooling water is heated by the divertor 23, passes through the main heat exchanger 27 to heat the high-pressure feed water on the secondary side, and is then pressurized by the main circulation pump 2 26 and backfilled into the divertor 23.

[0052] The baking mode includes a baking heating mode and a baking cooling mode;

[0053] In the baking heating mode, in the blanket cooling loop, safety isolation valve 1 2, safety isolation valve 2 3, safety isolation valve 3 11, and safety isolation valve 4 12 are opened, stop valve 4 9 and stop valve 5 17 are opened, stop valve 1 5, stop valve 2 6, stop valve 3 8, stop valve 6 18, and stop valve 7 20 are closed, flow regulating valve 1 19 is opened, and flow regulating valve 2 21 is closed. Cooling water is heated by heater 10, passes through flow regulating valve 1 19, and then pressurized by baking low flow pump 16 before being injected into blanket 1 for high-temperature baking.

[0054] In the baking heating mode, the safety isolation valve 5 24, the safety isolation valve 6 25, the safety isolation valve 7 28, and the safety isolation valve 8 29 in the divertor cooling loop are opened, the stop valve 10 32 is opened, the stop valve 9 31, the flow regulating valve 3 35, and the stop valve 8 42 are closed, and the cooling water is pressurized by the baking low flow pump 30 and heated by the baking heater 33 before entering the divertor 23 for high-temperature baking.

[0055] In the bake-out cooling mode, the safety isolation valve 1 2, safety isolation valve 2 3, safety isolation valve 3 11, and safety isolation valve 4 12 in the blanket cooling loop are opened, the stop valve 5 17, stop valve 6 18, and stop valve 7 20 are opened, the stop valve 1 5, stop valve 2 6, stop valve 3 8, and stop valve 4 9 are closed, the flow regulating valve 1 19 and flow regulating valve 2 21 are opened, and the cooling water is cooled by the bake-out cooler 1 22, pressurized by the bake-out low flow pump 16, and then injected into the blanket 1 to cool it;

[0056] In the baking cooling mode, the safety isolation valve five 24, safety isolation valve six 25, safety isolation valve seven 28, and safety isolation valve eight 29 in the divertor cooling loop are opened, the stop valve nine 31 and the flow regulating valve three 35 are opened, and the stop valve ten 32 and the stop valve eight 42 are closed. The cooling water is pressurized by the baking low-flow pump 30, cooled by the baking cooler two 34, and then enters the divertor 23.

[0057] In this embodiment, when the blanket cooling loop is in power generation mode, cooling water is heated by blanket 1. A portion of the hot water passes through heater 10, while the remaining portion passes through flow control valve 21. After merging, the water flows through steam generator 7, then is pressurized by main circulation pump 4 before being reinjected into blanket 1. This buffers thermal load fluctuations caused by the fusion reactor's unsteady-state operation mode and reduces the impact of varying loads on the steam turbine.

[0058] In this embodiment, in the blanket cooling loop's bakeout mode, cooling water is first heated by heater 10. A portion then flows through flow control valve 21, and another portion flows through bakeout cooler 1 22. The combined flows are then pressurized by bakeout low-flow pump 16 before being reinjected into blanket 1. This improves the bakeout efficiency of the tokamak's internal components and maximizes the use of existing equipment.

[0059] In this embodiment, in the divertor cooling loop in power generation mode, the cooling water is heated by the divertor 23 and then passes through the main heat exchanger 27 , and then is pressurized by the main circulation pump 2 26 and then re-injected into the divertor 23 .

[0060] In the divertor cooling loop's bakeout mode, part of the cooling water flows through the bakeout heater 33, while the remaining portion flows through flow control valve 3 35. The combined water flows are then pressurized by bakeout low-flow pump 2 30 before being reinjected into the divertor 23. This allows for quick adjustment of the temperature of the high-temperature bakeout hot water, allowing for flexible adjustments to the bakeout temperature based on the reactor's needs.

[0061] Feedwater from the steam power generation system on the secondary side is preheated by the divertor cooling loop's main heat transfer system before entering steam generator 7 to generate steam. This effectively utilizes the heat load of divertor 23 to preheat the high-pressure feedwater from the steam power generation system, fully utilizing the high-grade thermal energy generated by the fusion reactor.

[0062] Example 2

[0063] After a water loss accident occurs in the system, safety isolation valve 1 2, safety isolation valve 2 3, safety isolation valve 3 11, safety isolation valve 4 12 and safety isolation valve 5 24, safety isolation valve 6 25, safety isolation valve 7 28, and safety isolation valve 8 29 are closed to limit the mass and energy release of the system.

[0064] When the heat exchange pipes of steam generator 7 and main heat exchanger 27 rupture, secondary safety isolation valves 9 38, 10, 11, 40, and 12 41 close to prevent the leakage of radioactive corrosive substances. The above embodiments are merely a few optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art may make various alternative improvements and combinations of the above embodiments.

Claims

1. A fusion energy heat feed system loop structure, characterized in that: include: Blanket cooling loop and divertor cooling loop; The blanket cooling loop comprises a blanket (1), a main circulation pump (4), a steam generator (7), a heater (10), and a pressure stabilizer (13), which are connected in sequence to form a loop; The main circulation pump (4) is connected in parallel with a baking low flow pump (16), the steam generator (7) is connected in parallel with a flow regulating valve (19) and a baking cooler (22), and the heater (10) is connected in parallel with a flow regulating valve (21); The divertor cooling loop comprises a divertor (23), a second main circulation pump (26), a main heat exchanger (27), a second baking low flow pump (30), and a second pressure stabilizer (36), which are connected in sequence to form a loop; The second baking low flow pump (30) is respectively connected to a baking heater (33), a flow regulating valve (35) and a second baking cooler (34); the baking heater (33), the flow regulating valve (35) and the second baking cooler (34) are arranged in parallel and communicated between the divertor (23) and the second main circulation pump (26); A pressure relief assembly is connected between the blanket cooling loop and the divertor cooling loop; A safety isolation valve 1 (2) and a safety isolation valve 2 (3) are sequentially connected between the cladding (1) and the main circulation pump 1 (4); a stop valve 1 (5) and a stop valve 2 (6) are sequentially connected between the main circulation pump 1 (4) and the steam generator (7); a stop valve 3 (8) and a stop valve 4 (9) are sequentially connected between the steam generator (7) and the heater (10); and a safety isolation valve 3 (11) and a safety isolation valve 4 (12) are sequentially connected between the pressure stabilizer 1 (13) and the cladding (1).

2. A fusion energy heat feed system loop structure according to claim 1, characterized in that: A stop valve five (17) is connected between the baking low flow pump one (16) and the stop valve two (6), and a stop valve six (18) and a stop valve seven (20) are respectively installed at both ends of the divertor (23).

3. A fusion energy heat feed system loop structure according to claim 2, characterized in that: A safety isolation valve five (24) and a safety isolation valve six (25) are installed between the divertor (23) and the second main circulation pump (26), and a stop valve eight (42) is installed between the second main circulation pump (26) and the main heat exchanger (27); A safety isolation valve 7 (28) and a safety isolation valve 8 (29) are installed between the second stabilizer (36) and the divertor (23) and are connected in sequence.

4. A fusion energy heat feed system loop structure according to claim 3, characterized in that: A stop valve nine (31) is installed between the baking small flow pump two (30) and the baking cooler two (34), and a stop valve ten (32) is installed between the baking small flow pump two (30) and the baking heater (33).

5. A fusion energy heat feed system loop structure according to claim 4, characterized in that: The pressure relief assembly comprises a pressure relief box (15), the pressure relief box (15) is respectively connected to a pressure relief valve 1 (14) and a pressure relief valve 2 (37), a pressure stabilizer 1 (13) is connected to the pressure relief valve 1 (14), and the pressure relief valve 2 (37) is connected to the pressure stabilizer 2 (36).

6. A fusion energy heat feed system loop structure according to claim 5, characterized in that: The steam generator (7) is connected to the main heat exchanger (27), and the main heat exchanger (27) is connected to a safety isolation valve nine (38) and a safety isolation valve ten (39). The steam generator (7) is sequentially connected to a safety isolation valve eleven (40) and a safety isolation valve twelve (41).

7. A fusion energy heat feed system loop structure according to claim 6, characterized in that: The operating modes of the fusion energy heat feed system loop structure include power generation mode and baking mode.

8. A fusion energy heat feed system loop structure according to claim 7, characterized in that: In the power generation mode, the safety isolation valve 1 (2), the safety isolation valve 2 (3), the stop valve 1 (5), the stop valve 2 (6), the stop valve 3 (8), the stop valve 4 (9), the safety isolation valve 3 (11), and the safety isolation valve 4 (12) in the blanket cooling loop are opened, and the stop valve 5 (17), the stop valve 6 (18), and the stop valve 7 (20) are closed; After the cooling water is heated by the cladding (1), a portion thereof passes through the heater (10) and a portion thereof passes through the second flow regulating valve (21), and then the water is merged and passes through the steam generator (7) to heat the secondary side feed water to generate steam, which is then sent to the steam turbine to drive the steam turbine to generate electricity; Then, the cooling water is pressurized by the main circulation pump 1 (4) and then re-injected into the cladding (1). When the fusion reactor is in an unsteady state, the heater (10) is turned on to heat the cooling water so as to generate steam to maintain the minimum speed of the turbine; the safety isolation valve 5 (24), the safety isolation valve 6 (25), the safety isolation valve 7 (28), and the safety isolation valve 8 (29) in the divertor cooling loop are opened, the stop valve 9 (31) and the stop valve 10 (32) are closed, and the flow regulating valve 3 (35) is closed. After the cooling water is heated by the divertor (23), it passes through the main heat exchanger (27) to heat the high-pressure feed water on the secondary side, and then is pressurized and backfilled into the divertor (23) by the main circulation pump 2 (26).

9. A fusion energy heat feed system loop structure according to claim 7, characterized in that: The baking mode includes a baking heating mode and a baking cooling mode; In the baking heating mode, the safety isolation valve 1 (2), the safety isolation valve 2 (3), the safety isolation valve 3 (11), and the safety isolation valve 4 (12) in the blanket cooling loop are opened, the stop valve 4 (9) and the stop valve 5 (17) are opened, the stop valve 1 (5), the stop valve 2 (6), the stop valve 3 (8), the stop valve 6 (18), and the stop valve 7 (20) are closed, the flow regulating valve 1 (19) is opened, and the flow regulating valve 2 (21) is closed, the cooling water is heated by the heater (10), passes through the flow regulating valve 1 (19), and then is pressurized by the baking small flow pump 1 (16) and injected into the blanket (1) for high-temperature baking; In the baking heating mode, the safety isolation valve five (24), the safety isolation valve six (25), the safety isolation valve seven (28), and the safety isolation valve eight (29) in the divertor cooling loop are opened, the stop valve ten (32) is opened, the stop valve nine (31), the flow regulating valve three (35), and the stop valve eight (42) are closed, and the cooling water is pressurized by the baking low flow pump two (30) and then heated by the baking heater (33) before entering the divertor (23) for high-temperature baking. In the baking cooling mode, the safety isolation valve 1 (2), the safety isolation valve 2 (3), the safety isolation valve 3 (11), and the safety isolation valve 4 (12) in the blanket cooling loop are opened, the stop valve 5 (17), the stop valve 6 (18), and the stop valve 7 (20) are opened, the stop valve 1 (5), the stop valve 2 (6), the stop valve 3 (8), and the stop valve 4 (9) are closed, the flow regulating valve 1 (19) and the flow regulating valve 2 (21) are opened, and the cooling water is cooled by the baking cooler 1 (22), pressurized by the baking small flow pump 1 (16), and then injected into the blanket (1) to cool it; In the baking cooling mode, the safety isolation valve five (24), the safety isolation valve six (25), the safety isolation valve seven (28), and the safety isolation valve eight (29) in the divertor cooling loop are opened, the stop valve nine (31) and the flow regulating valve three (35) are opened, the stop valve ten (32) and the stop valve eight (42) are closed, and the cooling water is pressurized by the baking low flow pump two (30), cooled by the baking cooler two (34), and then enters the divertor (23).

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