阅读说明：本技术 一种核电厂用紧凑高效换热设备 (Nuclear power plant uses compact high-efficient indirect heating equipment ) 是由 王晓和 李海涛 刘天斌 张后龙 焦少阳 王晓轩 于 2021-07-05 设计创作，主要内容包括：本发明属于核电厂换热技术领域,具体涉及一种核电厂用紧凑高效换热设备,包括若干层交错层叠设置的冷却水侧换热板(15)和反应堆冷却剂侧换热板(14),以及穿过所述冷却水侧换热板(15)和所述反应堆冷却剂侧换热板(14)的喷淋水换热管(16)。本发明的整体部分采用增材制造技术制造,一体化加工能够增加设备强度,承受很大的工作压力,同时保证良好的密封性能,可实现两种不同工况各自作用时流体间的换热,有利于简化和优化系统设计,提高核电厂的经济性。(The invention belongs to the technical field of heat exchange of nuclear power plants, and particularly relates to compact and efficient heat exchange equipment for a nuclear power plant, which comprises a plurality of layers of cooling water side heat exchange plates (15) and reactor coolant side heat exchange plates (14) which are arranged in a staggered and stacked mode, and spray water heat exchange pipes (16) penetrating through the cooling water side heat exchange plates (15) and the reactor coolant side heat exchange plates (14). The integral part of the invention is manufactured by adopting an additive manufacturing technology, the integral processing can increase the equipment strength, bear great working pressure, simultaneously ensure good sealing performance, realize the heat exchange between fluids under the respective action of two different working conditions, be conductive to simplifying and optimizing the system design and improve the economy of a nuclear power plant.)

1. The utility model provides a nuclear power plant uses compact high-efficient indirect heating equipment, is connected characterized by with reactor coolant system, cooling water system and spray water system: including cooling water side heat transfer board (15) and reactor coolant side heat transfer board (14) of a plurality of layers crisscross range upon range of setting, and pass cooling water side heat transfer board (15) with spray water heat exchange tube (16) of reactor coolant side heat transfer board (14), through cooling water side heat transfer board (15) reactor coolant side heat transfer board (14) with spray water heat exchange tube (16) are realized reactor coolant system cooling water system with mutual heat transfer between the spray water system.

2. The compact and efficient heat exchange equipment for nuclear power plants as claimed in claim 1, wherein: the utility model discloses a reactor coolant heat transfer plate, including cooling water side heat transfer plate (15) and reactor coolant side heat transfer plate (14), cooling water side heat transfer plate (15) with reactor coolant side heat transfer plate (14) are parallel to each other, cooling water side heat transfer plate (15) with reactor coolant side heat transfer plate (14) are butterfly form plate structure, a side plane of cooling water side heat transfer plate (15) is equipped with cooling water heat transfer passageway, a side plane of reactor coolant side heat transfer plate (14) is equipped with coolant heat transfer passageway.

3. The compact and efficient heat exchange equipment for nuclear power plants as claimed in claim 2, wherein:

a coolant inlet section (17) and a coolant outlet section (18) are respectively arranged at two ends of the reactor coolant side heat exchange plate (14), a heat exchange section (21) is arranged in the middle of the reactor coolant side heat exchange plate (14), parallel coolant heat exchange channels are arranged, and angles are arranged between the coolant inlet section (17) and the coolant outlet section (18) and the coolant heat exchange channels;

a cooling water inlet section (19) and a cooling water outlet section (20) are respectively arranged at two ends of the cooling water side heat exchange plate (15), a heat exchange section (21) is arranged in the middle of the cooling water side heat exchange plate (15), parallel cooling water heat exchange channels are arranged, and an angle is arranged between the cooling water inlet section (19) and the cooling water outlet section (20) and the cooling water heat exchange channels;

the cooling water inlet section (19) of the cooling water side heat exchange plate (15) and the coolant outlet section (18) of the reactor coolant side heat exchange plate (14) are located on the same side but separated from each other;

the cooling water outlet section (20) of the cooling water side heat exchange plate (15) and the coolant inlet section (17) of the reactor coolant side heat exchange plate (14) are located on the same side but separated from each other;

the heat exchange sections (21) of the cooling water side heat exchange plates (15) and the heat exchange sections (21) of the reactor coolant side heat exchange plates (14) are arranged in a staggered and stacked mode.

4. The compact and efficient heat exchange equipment for nuclear power plants as claimed in claim 3, wherein: the spray water heat exchange tubes (16) penetrate through the heat exchange sections (21) of the cooling water side heat exchange plates (15) and the heat exchange sections (21) of the reactor coolant side heat exchange plates (14) which are arranged in a staggered and stacked mode, and the spray water heat exchange tubes (16) are not communicated with the cooling water heat exchange channels and the coolant heat exchange channels; and the heat exchange section (21) of the cooling water side heat exchange plate (15), the heat exchange section (21) of the reactor coolant side heat exchange plate (14) and the spray water heat exchange pipe (16) penetrating through the heat exchange sections form an equipment core body together.

5. The compact and efficient heat exchange equipment for nuclear power plants as claimed in claim 4, wherein:

the cooling water inlet section (19) and the cooling water outlet section (20) of the cooling water side heat exchange plate (15) are divided into a port portion (22) and a transition portion (23), the port portion (22) is a portion of the heat exchange section (21) far away from the middle portion, and the transition portion (23) is a portion connecting the heat exchange section (21); the port part (22) adopts a streamline convex dotted flow channel; the transition part (23) adopts a continuous flow channel, and the distance between the continuous flow channels is changed from narrow to wide along with the increase of the flow distance;

the cooling water inlet section (19) and the cooling water outlet section (20) of the reactor coolant side heat exchange plate (14) are divided into a port portion (22) and a transition portion (23), the port portion (22) being a portion of the heat exchange section (21) away from the middle portion, the transition portion (23) being a portion connecting the heat exchange sections (21); the port part (22) adopts a streamline convex dotted flow channel; the transition part (23) adopts continuous flow channels, and the distance between the continuous flow channels is changed from narrow to wide along with the increase of the flow distance.

6. The compact and efficient heat exchange equipment for nuclear power plants as claimed in claim 4, wherein: the spray water heat exchange tubes (16) are composed of oval-like heat exchange tubes which are alternately arranged.

7. The compact and efficient heat exchange equipment for nuclear power plants as claimed in claim 5, wherein: the reactor coolant side heat exchange plate (14), the cooling water side heat exchange plate (15) and the spray water heat exchange pipe (16) are processed in an additive manufacturing mode to form a whole.

8. The compact and efficient heat exchange equipment for nuclear power plants as claimed in claim 5, wherein:

a third rectifying device (6) is arranged on the coolant inlet section (17), and a third flange (5) is arranged on the third rectifying device (6); a first fairing (2) is arranged on the coolant outlet section (18), and a first flange (1) is arranged on the first fairing (2); the reactor coolant system is communicated with the reactor coolant side heat exchange plate (14) through the third flange (5) and the first flange (1); the coolant in the reactor coolant system enters the reactor coolant side heat exchange plate (14) from the third flange (5) through the third rectifying device (6) and then returns to the reactor coolant system from the first flange (1) through the first rectifying device (2);

a second rectifying device (3) is arranged on the cooling water inlet section (19), and a second flange (4) is arranged on the second rectifying device (3); a fourth rectifying device (7) is arranged on the cooling water outlet section (20), and a fourth flange (8) is arranged on the fourth rectifying device (7); the cooling water system is communicated with the cooling water side heat exchange plate (15) through the second flange (4) and the fourth flange (8); the cooling water in the cooling water system enters the cooling water side heat exchange plate (15) from the second flange (4) through the second rectifying device (3) and then returns to the cooling water system from the fourth flange (8) through the fourth rectifying device (7);

a fifth rectifying device (10) is arranged at one end of the spray water heat exchange pipe (16), and a fifth flange (9) is arranged on the fifth rectifying device (10); a sixth rectifying device (11) is arranged at the other end of the spray water heat exchange pipe (16), and a sixth flange (12) is arranged on the sixth rectifying device (11); the spray water system is communicated with the spray water heat exchange pipe (16) through the fifth flange (9) and the sixth flange (12); and spray water in the spray water system enters the spray water heat exchange pipe (16) from the sixth flange (12) through the sixth rectifying device (11) and then returns to the spray water system from the fifth flange (9) through the fifth rectifying device (10).

9. The compact and efficient heat exchange equipment for nuclear power plants as claimed in claim 8, wherein: the first rectifying device (2), the second rectifying device (3), the third rectifying device (6), the fourth rectifying device (7), the fifth rectifying device (10) and the sixth rectifying device (11) are internally provided with flow dividing and converging devices, so that fluid entering the reactor coolant side heat exchange plate (14), the cooling water side heat exchange plate (15) and the spray water heat exchange pipe (16) is more uniform and energy loss in the flowing process is reduced.

10. The compact and efficient heat exchange equipment for nuclear power plants as claimed in claim 1, wherein: and edge plates (13) are arranged on the cooling water side heat exchange plates (15) or the reactor coolant side heat exchange plates (14) positioned at the topmost layer and the bottommost layer.

Technical Field

The invention belongs to the technical field of heat exchange of nuclear power plants, and particularly relates to compact and efficient heat exchange equipment for a nuclear power plant.

Background

The nuclear power plant needs a large amount of heat exchange equipment in the operation process, and the heat exchange equipment is almost all traditional shell-and-tube heat exchange equipment and plate heat exchange equipment for realizing heat exchange of two fluids. However, the shell-and-tube heat exchange equipment has large volume, low thermal efficiency and poor economical efficiency; plate heat exchange equipment has many sealing structures, low pressure bearing capacity and poor safety. Moreover, with the development of nuclear power technology, the appearance of pile types such as micro piles and small piles has higher requirements on the aspects of heat exchange efficiency, safety, economy and the like of heat exchange equipment. A single traditional heat exchange device can only realize heat exchange between two fluids in function and cannot be used for or simultaneously used for multiple heat exchange working conditions; is limited by the structure and the processing and manufacturing method, and can not improve the heat exchange efficiency. In a word, the traditional heat exchange equipment has the problems that the size of a nuclear power plant is not favorably reduced, the arrangement space is optimized, and the economy and the safety of the nuclear power plant are improved.

Disclosure of Invention

Aiming at the technical problems of the existing heat exchange equipment, the invention aims to provide the multifunctional heat exchange equipment which is based on the additive manufacturing technology and used for the nuclear power plant, has the advantages of compact structure, high heat transfer efficiency and good economical efficiency, and can be independently used for leading out the waste heat of a reactor under the shutdown condition of the reactor and also can be independently used for leading out the heat of containment vessel spray water under the accident working condition.

In order to achieve the above purpose, the technical scheme adopted by the invention is that the compact high-efficiency heat exchange equipment for the nuclear power plant is connected with a reactor coolant system, a cooling water system and a spray water system, and comprises a plurality of layers of cooling water side heat exchange plates and reactor coolant side heat exchange plates which are staggered and stacked, and spray water heat exchange pipes which penetrate through the cooling water side heat exchange plates and the reactor coolant side heat exchange plates, and mutual heat exchange among the reactor coolant system, the cooling water system and the spray water system is realized through the cooling water side heat exchange plates, the reactor coolant side heat exchange plates and the spray water heat exchange pipes.

Further, the cooling water side heat transfer board with reactor coolant side heat transfer board is parallel to each other, the cooling water side heat transfer board with reactor coolant side heat transfer board is butterfly form plate structure, a side plane of cooling water side heat transfer board is equipped with cooling water heat transfer passageway, a side plane of reactor coolant side heat transfer board is equipped with coolant heat transfer passageway.

Further, in the present invention,

a coolant inlet section and a coolant outlet section are respectively arranged at two ends of the reactor coolant side heat exchange plate, a heat exchange section is arranged in the middle of the reactor coolant side heat exchange plate, parallel coolant heat exchange channels are arranged, and angles are arranged between the coolant inlet section and the coolant outlet section and the coolant heat exchange channels;

the two ends of the cooling water side heat exchange plate are respectively provided with a cooling water inlet section and a cooling water outlet section, the middle part of the cooling water side heat exchange plate is provided with a heat exchange section, parallel cooling water heat exchange channels are arranged, and angles are arranged between the cooling water inlet section and the cooling water outlet section and the cooling water heat exchange channels;

the cooling water inlet section of the cooling water side heat exchange plate and the coolant outlet section of the reactor coolant side heat exchange plate are located on the same side but are separated from each other;

the cooling water outlet section of the cooling water side heat exchange plate and the coolant inlet section of the reactor coolant side heat exchange plate are located on the same side but separated from each other;

and the heat exchange sections of the cooling water side heat exchange plate and the heat exchange sections of the reactor coolant side heat exchange plate are staggered and stacked.

Furthermore, the spray water heat exchange tube penetrates through the heat exchange sections of the cooling water side heat exchange plates and the heat exchange sections of the reactor coolant side heat exchange plates which are arranged in a staggered and stacked mode, and the spray water heat exchange tube is not communicated with the cooling water heat exchange channel and the coolant heat exchange channel; and the heat exchange section of the cooling water side heat exchange plate, the heat exchange section of the reactor coolant side heat exchange plate and the spray water heat exchange pipe penetrating through the heat exchange sections form an equipment core body together.

Further, in the present invention,

the cooling water inlet section and the cooling water outlet section of the cooling water side heat exchange plate are divided into a port part and a transition part, the port part is a part of the heat exchange section far away from the middle part, and the transition part is a part connected with the heat exchange section; the port part adopts a streamline convex dotted flow channel; the transition part adopts continuous flow channels, and the distance between the continuous flow channels is changed from narrow to wide along with the increase of the flow distance;

the cooling water inlet section and the cooling water outlet section of the reactor coolant side heat exchange plate are divided into a port part and a transition part, the port part is a part of the heat exchange section far away from the middle part, and the transition part is a part connected with the heat exchange section; the port part adopts a streamline convex dotted flow channel; the transition part adopts continuous flow channels, and the distance between the continuous flow channels is changed from narrow to wide along with the increase of the flow distance.

Furthermore, the spray water heat exchange tubes are composed of oval-like heat exchange tubes which are alternately arranged.

Furthermore, the reactor coolant side heat exchange plate, the cooling water side heat exchange plate and the spray water heat exchange tube are processed in an additive manufacturing mode to form a whole.

Further, in the present invention,

a third rectifying device is arranged on the coolant inlet section, and a third flange is arranged on the third rectifying device; a first rectifying device is arranged on the coolant outlet section, and a first flange is arranged on the first rectifying device; the reactor coolant system is communicated with the reactor coolant side heat exchange plate through the third flange and the first flange; coolant in the reactor coolant system enters the reactor coolant side heat exchange plate from the third flange through the third rectifying device and then returns to the reactor coolant system from the first flange through the first rectifying device;

a second rectifying device is arranged on the cooling water inlet section, and a second flange is arranged on the second rectifying device; a fourth rectifying device is arranged on the cooling water outlet section, and a fourth flange is arranged on the fourth rectifying device; the cooling water system is communicated with the cooling water side heat exchange plate through the second flange and the fourth flange; cooling water in the cooling water system enters the cooling water side heat exchange plate from the second flange through the second rectifying device and then returns to the cooling water system from the fourth flange through the fourth rectifying device;

a fifth rectifying device is arranged at one end of the spray water heat exchange pipe, and a fifth flange is arranged on the fifth rectifying device; a sixth rectifying device is arranged at the other end of the spray water heat exchange tube, and a sixth flange is arranged on the sixth rectifying device; the spraying water system is communicated with the spraying water heat exchange pipe through the fifth flange and the sixth flange; and spray water in the spray water system enters the spray water heat exchange tube from the sixth flange through the sixth rectifying device and then returns to the spray water system from the fifth flange through the fifth rectifying device.

Furthermore, the first rectifying device, the second rectifying device, the third rectifying device, the fourth rectifying device, the fifth rectifying device and the sixth rectifying device are internally provided with a flow dividing and converging device, so that fluid entering the reactor coolant side heat exchange plate, the cooling water side heat exchange plate and the spray water heat exchange tube is more uniform, and energy loss in the flowing process is reduced.

Furthermore, the cooling water side heat exchange plates or the reactor coolant side heat exchange plates positioned at the topmost layer and the bottommost layer are provided with edge plates.

The invention has the beneficial effects that:

1. the cooling water side heat exchange plates 15 and the reactor coolant side heat exchange plates 14 are arranged in a staggered and stacked mode, streamline convex runners are adopted for the heat exchange plates, and the streamline convex runners are arranged alternately, so that the heat exchange area is greatly increased, the flowing resistance is not excessively increased, the fluid turbulence degree can be improved, and the heat exchange capacity is improved.

2. According to the fluid flow distance and the structural form, the flow passages of the cooling water side heat exchange plate 15 and the reactor coolant side heat exchange plate 14 are widened from narrow to wide, so that the flow passages are reasonable in structure, and the fluid distribution is more uniform.

3. The cooling water side heat exchange plates 15 and the reactor coolant side heat exchange plates 14 which are arranged in a staggered and stacked mode and the spray water heat exchange tubes 16 which penetrate through the cooling water side heat exchange plates and the reactor coolant side heat exchange plates form an equipment core body, and the structure can absorb thermal deformation in the operation process of equipment and reduce thermal stress.

4. The shower water heat exchange tubes 16 are composed of oval-like heat exchange tubes arranged alternately, fluid can be fully stirred when flowing through the heat exchange tubes, fluid turbulence is promoted, heat transfer performance is improved, fluid resistance can be reduced due to the oval-like heat exchange tube structure, and balance between heat exchange efficiency and flow resistance is achieved.

5. The integral part of the invention is manufactured by adopting an additive manufacturing technology, and the integral processing can increase the equipment strength, bear great working pressure and simultaneously ensure good sealing performance.

6. The invention can realize the heat exchange between the fluids under the respective action of two different working conditions, and is beneficial to simplifying and optimizing the system design.

7. The invention can effectively isolate three fluids in the reactor coolant side heat exchange plate 14, the cooling water side heat exchange plate 15 and the spray water heat exchange tube 16, so that the three fluids do not influence each other, and the purity of media in each system is ensured.

8. The invention has large specific surface area, high heat exchange efficiency, small equipment volume and low material cost, and improves the economy of the nuclear power plant on the basis of optimizing the arrangement space of the nuclear power plant.

Drawings

FIG. 1 is a schematic diagram of a compact, high efficiency heat exchange apparatus for a nuclear power plant according to an embodiment of the present invention;

FIG. 2 is a top view of a compact, high efficiency heat exchange apparatus for a nuclear power plant in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a compact and efficient heat exchange apparatus for a nuclear power plant according to an embodiment of the present invention (including a cross-sectional view of the core portion of the apparatus);

FIG. 4 is an enlarged, fragmentary schematic view of a portion of heat exchange section 21 of FIG. 3;

FIG. 5 is a schematic view of a compact and efficient heat exchange apparatus for a nuclear power plant according to an embodiment of the present invention (including a cross-sectional view of a cooling water side heat exchange plate portion);

FIG. 6 is a partially enlarged schematic view of a portion of the cooling water outlet section 20 in FIG. 5 (the structure of the coolant inlet section 17, the coolant outlet section 18, and the cooling water inlet section 19 coincides with the structure of the portion of the cooling water outlet section 20);

in the figure: 1-a first flange, 2-a first fairing, 3-a second fairing, 4-a second flange, 5-a third flange, 6-a third fairing, 7-a fourth fairing, 8-a fourth flange, 9-a fifth flange, 10-a fifth fairing, 11-a sixth fairing, 12-a sixth flange, 13-a sideboard, 14-a reactor coolant-side heat exchange plate, 15-a coolant-side heat exchange plate, 16-a spray water heat exchange tube, 17-a coolant inlet section, 18-a coolant outlet section, 19-a coolant inlet section, 20-a coolant outlet section, 21-a heat exchange section, 22-a port section, and 23-a transition section.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in fig. 1 and 3, the compact and efficient heat exchange device for a nuclear power plant provided by the invention is connected with a reactor coolant system, a cooling water system and a spray water system, and comprises a plurality of layers of cooling water side heat exchange plates 15 and reactor coolant side heat exchange plates 14 (for example, the first layer at the bottom is the reactor coolant side heat exchange plate 14, the second layer upwards is the cooling water side heat exchange plate 15, the third layer upwards is the reactor cooling side heat exchange plate 14, and the like) which are arranged in a staggered and stacked manner, and spray water heat exchange tubes 16 which penetrate through the cooling water side heat exchange plates 15 and the reactor coolant side heat exchange plates 14, so that mutual heat exchange among the reactor coolant system, the cooling water system and the spray water system is realized through the cooling water side heat exchange plates 15, the reactor coolant side heat exchange plates 14 and the spray water heat exchange tubes 16.

The cooling water side heat exchange plate 15 and the reactor coolant side heat exchange plate 14 are parallel to each other, the cooling water side heat exchange plate 15 and the reactor coolant side heat exchange plate 14 are of butterfly-shaped flat plate structures, a cooling water heat exchange channel (a streamline convex flow channel) is arranged on one side plane of the cooling water side heat exchange plate 15, and a coolant heat exchange channel (a streamline convex flow channel) is arranged on one side plane of the reactor coolant side heat exchange plate 14.

As shown in fig. 2 and 5, a coolant inlet section 17 and a coolant outlet section 18 are respectively arranged at two ends of the reactor coolant-side heat exchange plate 14, a heat exchange section 21 is arranged in the middle of the reactor coolant-side heat exchange plate 14, parallel coolant heat exchange channels are arranged, and an angle is arranged between the coolant inlet section 17 and the coolant outlet section 18 and the coolant heat exchange channels;

the two ends of the cooling water side heat exchange plate 15 are respectively provided with a cooling water inlet section 19 and a cooling water outlet section 20, the middle part of the cooling water side heat exchange plate 15 is provided with a heat exchange section 21, parallel cooling water heat exchange channels are arranged, and angles are arranged between the cooling water inlet section 19 and the cooling water outlet section 20 and the cooling water heat exchange channels;

the cooling water inlet section 19 of the cooling water side heat exchange plate 15 and the coolant outlet section 18 of the reactor coolant side heat exchange plate 14 are located on the same side but separated from each other (not laminated together);

the cooling water outlet section 20 of the cooling water side heat exchange plate 15 and the coolant inlet section 17 of the reactor coolant side heat exchange plate 14 are located on the same side but separated from each other (not laminated together);

the heat exchange sections 21 of the cooling water side heat exchange plates 15 and the heat exchange sections 21 of the reactor coolant side heat exchange plates 14 are alternately stacked one on another.

As shown in fig. 4, the spray water heat exchange tubes 16 pass through the heat exchange sections 21 of the cooling water side heat exchange plates 15 and the heat exchange sections 21 of the reactor coolant side heat exchange plates 14 which are alternately stacked, and the spray water heat exchange tubes 16 are not communicated with the cooling water heat exchange channels and the coolant heat exchange channels; the heat exchange section 21 of the cooling water side heat exchange plate 15, the heat exchange section 21 of the reactor coolant side heat exchange plate 14 and the spray water heat exchange tubes 16 penetrating through the heat exchange sections form an equipment core together.

As shown in fig. 6, the cooling water inlet section 19 and the cooling water outlet section 20 of the cooling water side heat exchange plate 15 are divided into a port portion 22 and a transition portion 23, the port portion 22 being a portion of the heat exchange section 21 away from the middle portion, the transition portion 23 being a portion connecting the heat exchange sections 21; the port part 22 adopts a streamline convex dotted flow channel; the transition part 23 adopts a continuous flow passage, and the distance between the continuous flow passages is changed from narrow to wide along with the increase of the flow distance;

the cooling water inlet section 19 and the cooling water outlet section 20 of the reactor coolant side heat exchange plate 14 are divided into a port portion 22 and a transition portion 23, the port portion 22 is a portion of the heat exchange section 21 away from the middle portion, and the transition portion 23 is a portion connecting the heat exchange section 21; the port part 22 adopts a streamline convex dotted flow channel; the transition portion 23 employs continuous flow channels whose pitch is narrowed and widened as the flow distance increases.

The shower water heat exchange tubes 16 are composed of oval-like heat exchange tubes arranged alternately.

The reactor coolant side heat exchange plate 14, the cooling water side heat exchange plate 15 and the spray water heat exchange tube 16 are machined in an additive manufacturing mode to form a whole.

A third rectifying device 6 is arranged on the coolant inlet section 17, and a third flange 5 is arranged on the third rectifying device 6; a first fairing 2 is arranged on the coolant outlet section 18, and a first flange 1 is arranged on the first fairing 2; the reactor coolant system is communicated with the reactor coolant side heat exchange plate 14 through the third flange 5 and the first flange 1; the coolant in the reactor coolant system enters the reactor coolant side heat exchange plate 14 from the third flange 5 through the third rectifying device 6 and then returns to the reactor coolant system from the first flange 1 through the first rectifying device 2;

a second rectifying device 3 is arranged on the cooling water inlet section 19, and a second flange 4 is arranged on the second rectifying device 3; a fourth rectifying device 7 is arranged on the cooling water outlet section 20, and a fourth flange 8 is arranged on the fourth rectifying device 7; the cooling water system is communicated with the cooling water side heat exchange plate 15 through the second flange 4 and the fourth flange 8; cooling water in the cooling water system enters the cooling water side heat exchange plate 15 from the second flange 4 through the second rectifying device 3 and then returns to the cooling water system from the fourth flange 8 through the fourth rectifying device 7;

one end of the spray water heat exchange pipe 16 is provided with a fifth rectifying device 10, and the fifth rectifying device 10 is provided with a fifth flange 9; a sixth rectifying device 11 is arranged at the other end of the spray water heat exchange pipe 16, and a sixth flange 12 is arranged on the sixth rectifying device 11; the spraying water system is communicated with a spraying water heat exchange tube 16 through a fifth flange 9 and a sixth flange 12; spray water in the spray water system enters the spray water heat exchange tube 16 from the sixth flange 12 through the sixth rectifying device 11 and then returns to the spray water system from the fifth flange 9 through the fifth rectifying device 10;

as shown in fig. 1, the pipelines of the reactor coolant system, the cooling water system and the spray water system are provided with valves for opening or closing the reactor coolant, the cooling water and the spray water and adjusting the flow rate under different working conditions.

The first rectifying device 2, the second rectifying device 3, the third rectifying device 6, the fourth rectifying device 7, the fifth rectifying device 10 and the sixth rectifying device 11 are internally provided with flow dividing and converging devices, so that fluid entering the reactor coolant side heat exchange plate 14, the cooling water side heat exchange plate 15 and the spray water heat exchange pipe 16 is more uniform, and energy loss in the flowing process is reduced.

As shown in fig. 3, the edge plates 13 are provided on the cooling water side heat exchange plates 15 or the reactor coolant side heat exchange plates 14 located at the topmost and bottommost layers.

The device according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.