Cooling device for the concrete of a pool-type low-temperature heat supply reactor and method for cooling thereof

Abstract

The application provides a cooling device for pool-type low-temperature heat supply reactor concrete and a cooling method thereof, and belongs to the technical field of pool-type low-temperature heat supply reactors. The application solves the problem that the heat supply reactor concrete cannot be cooled for a long time in the prior art. The cooling device comprises a reactor core, pool water, a lining tube, a primary loop purification system, a primary loop, a primary loop purification system backwater pipe and a primary loop backwater pipe. The reactor core is arranged in the pool water, the pool water is filled in the lining tube, the lining tube is installed in the concrete, a gap is arranged between the outside of the lining tube and the inside of the concrete, a water layer is arranged in the gap between the outside of the lining tube and the concrete, the contact surface between the water layer and the concrete is a pool wall surface, the input end of the primary loop is connected with the primary loop backwater pipe, and the output end of the primary loop backwater pipe is located in the pool water. The cooling device is mainly used for cooling the pool-type low-temperature heat supply reactor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pool-type low-temperature heat supply reactor, in particular to a cooling device for pool-type low-temperature heat supply reactor concrete and a cooling method thereof. BACKGROUND

[0002] After the pool-type low-temperature heat supply reactor improves the operating parameters, the average temperature in the pool water will inevitably increase significantly, and the high-temperature pool water will affect the bearing capacity of the concrete outside the pool. Therefore, a reliable and feasible heat insulation scheme is needed to reduce the temperature of the concrete. In the field of pool-type low-temperature heat supply reactor, no relevant heat insulation scheme has been proposed in the current research, but in the field of construction, the water flow window is a widely used heat insulation scheme to reduce the heat entering from the outside into the house. Its principle is to take away the heat in the window through the flow of water, and then the low-temperature water flows into the window again to absorb heat after being cooled externally. In addition, some scholars have proposed some coating or insulation material heat insulation schemes in the field of construction.

[0003] However, according to the theory of heat transfer, the soil outside the concrete is considered as a "semi-infinite object" in the process of heat transfer, that is, the heat transfer from the reactor to the soil is not unlimited, which will be a complex non-steady-state process. This phenomenon is also called "heat accumulation" phenomenon, that is, the heat generated in the reactor will gradually accumulate in the reactor, concrete, etc. In other words, due to the existence of soil, the scheme of heat insulation by coating or insulation material alone will gradually fail over time without a cold source. SUMMARY

[0004] Therefore, the present application aims to provide a cooling device for pool-type low-temperature heat supply reactor concrete and a cooling method thereof to solve the problem that the existing technology cannot cool the heat supply reactor concrete for a long time.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A cooling device for pool-type low-temperature heat supply reactor concrete, comprising a reactor core, pool water, a liner, a primary loop purification system, a primary loop, a primary loop purification system backwater pipe and a primary loop backwater pipe, the reactor core is arranged in the pool water, the pool water is filled in the liner, the liner is installed in the pool water, a gap is provided between the outside of the liner and the inside of the concrete, a water layer is provided in the gap between the outside of the liner and the concrete, the contact surface between the water layer and the concrete is the pool wall surface, the input end of the primary loop is connected with the primary loop backwater pipe, the output end of the primary loop backwater pipe is located in the pool water, the output end of the primary loop purification system backwater pipe is located in the water layer, the input end of the primary loop purification system is connected with the primary loop, and the liner is provided with a flow hole.

[0007] Further, a purification pump is arranged on the pipeline of the primary loop purification system.

[0008] Further, a middle basket is arranged on the core, and the middle basket is connected with the input end of the water outlet pipe.

[0009] Further, the output end of the water outlet pipe is connected with the input end of the first heat exchanger, the output end of the first heat exchanger is connected with the primary loop reinjection water pipe, a main pump is arranged between the water outlet pipe and the first heat exchanger, and the other side of the first heat exchanger is connected with the secondary loop.

[0010] Further, a secondary loop pump is arranged on the secondary loop.

[0011] Further, two second heat exchangers are connected with the secondary loop, and the other sides of the two second heat exchangers are connected with the heat network.

[0012] Further, the bottom of the lining cylinder is provided with a communication hole.

[0013] Further, a cover plate is arranged at the position of the flow hole of the lining cylinder.

[0014] Further, a switch is arranged on the cover plate.

[0015] Further, a cooling method for the cooling device of the pool type low temperature heat supply reactor concrete is provided, which comprises the following steps:

[0016] Step 1: the cooling device is arranged in the pool water of the heat supply reactor concrete;

[0017] Step 2: according to the requirement, the cover plate of the flow hole arranged at the corresponding position of the lining cylinder is opened;

[0018] Step 3: the reinjection water of the primary loop purification system is injected into the water layer through the primary loop purification system reinjection water pipe;

[0019] Step 4: the injected fluid flows downward through the flow hole of the lining cylinder and flows into the pool water, and the fluid flowing into the heat supply reactor is circulated and then flows into the primary loop through the core, the middle basket and the water outlet pipe;

[0020] Step 5: after the heat exchange is completed, the fluid flows into the pool water again, and since the reinjected fluid is continuously heat-exchanged outside, the temperature is less than the temperature of the fluid in the water layer, so that the water layer is cooled.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] 1. The liner of this invention is equipped with flow holes, ensuring the cooling effect on the water layer under normal operating conditions. During normal operation, the low-temperature reinjected water mixes with the high-temperature fluid inside the water layer and flows into the pool water through the flow holes, driven by the gravity head formed by the level difference between the water layer and the pool water. The continuous flow of fluid within the water layer ensures the cooling effect of this solution on the pool wall and concrete.

[0023] 2. The liner of this invention has a connecting hole at the bottom, which ensures the cooling effect of the water layer on the pool water under accident conditions. Under the accident condition of power failure, there is no reinjection of water on the water layer side. The connecting hole ensures that the pool water and the liquid level on both sides of the water layer remain consistent. Under the accident condition, the temperature of the pool water in the pile gradually increases, the evaporation will also increase significantly, and the water volume in the pool water will decrease significantly. The connecting hole at the bottom of the liner can ensure that all fluid in the water layer can flow into the pool water to reduce the pool water temperature.

[0024] 3. The liner of the present invention is provided with a cover plate on the flow hole. The position and number of the opening can be controlled by opening and closing the cover plate, thereby adjusting the flow field distribution in the water layer and optimizing the heat insulation effect. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Fig. 1 This is a schematic diagram of the circuit arrangement of the present invention;

[0027] Fig. 2 This is a schematic diagram of the internal structure of the heap of the present invention.

[0028] 1-Core, 2-Pool water, 3-Liner, 4-Primary loop, 5-Secondary loop, 6-Primary loop purification system, 8-Heating network, 9-Main pump, 10-Primary loop purification system reinjection pipe, 11-Water layer, 12-Secondary loop pump, 13-Purification pump, 14-Primary loop reinjection pipe, 15-Pool wall, 16-Flow hole, 17-Concrete, 18-Central suspended platform, 19-Connecting hole, 20-Outlet pipe, 21-Cover plate. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0030] Specific implementation method one: See Figs. 1-2The embodiment is characterized in that: the cooling device for the concrete of the pool type low temperature heat supply reactor comprises a reactor core 1, pool water 2, a lining tube 3, a primary loop purification system 6, a primary loop 4, a primary loop purification system backwater pipe 10 and a primary loop backwater pipe 14, the reactor core 1 is arranged in the pool water 2, the pool water 2 is filled in the lining tube 3, the lining tube 3 is installed in the pool water 2, a gap is arranged between the outside of the lining tube 3 and the inside of the concrete 17, a water layer 11 is arranged in the gap between the outside of the lining tube 3 and the concrete 17, the contact surface between the water layer 11 and the concrete 17 is a pool wall surface 15, the input end of the primary loop 4 is connected with the primary loop backwater pipe 14, the output end of the primary loop backwater pipe 14 is located in the pool water 2, the output end of the primary loop purification system backwater pipe 10 is located in the water layer 11, the input end of the primary loop purification system 6 is connected with the primary loop 4, the lining tube 3 is provided with a flow hole 16, a purification pump 13 is arranged on the pipeline of the primary loop purification system 6, a middle basket 18 is arranged on the reactor core 1, and the middle basket 18 is connected with the input end of a water outlet pipe 20.

[0031] Firstly, the cover plate 21 of the flow hole 16 arranged on the corresponding position of the lining tube 3 is opened, then the backwater of the primary loop purification system 6 is injected into the water layer 11 through the primary loop purification system backwater pipe 10, the injected fluid flows downwards through the flow hole 16 on the lining tube 3 and flows into the pool water 2, the fluid flowing into the heat supply reactor is circulated through the original circulation, and then flows into the primary loop 4 through the reactor core 1, the middle basket 18 and the water outlet pipe 20 in sequence, and then reflows into the pool water 2 after heat exchange is completed, but a small part of the fluid flows into the primary loop purification system 6 after heat exchange, impurities are removed in the primary loop purification system, and then the fluid is injected into the water layer 11 through the primary loop purification system backwater pipe 10 after purification is completed, since the backwater is continuously heat-exchanged outside, the temperature is far less than the temperature of the fluid in the water layer 11, so the cooling of the water layer 11 can be realized, the flow hole 16 arranged on the lining tube 3 ensures the cooling effect of the water layer 11 under the normal operation condition, under the normal operation condition, the low temperature backwater injected into the water layer mixes with the high temperature fluid inside, and flows into the pool water 2 through the flow hole under the driving of the hydrostatic head formed by the liquid level difference between the water layer 11 and the pool water 2, and the continuous flow of the fluid in the water layer ensures the cooling effect of the pool wall surface 15 and the concrete 17.

[0032] Specific implementation method two: refer to Figs. 1-2The embodiment is described as follows: the output end of the water outlet pipe 20 is connected with the input end of the first heat exchanger, the output end of the first heat exchanger is connected with a loop backwater pipe 14, the main pump 9 is arranged between the water outlet pipe 20 and the first heat exchanger, the other side of the first heat exchanger is connected with a secondary loop 5, the secondary loop 5 is provided with a secondary loop pump 12, two second heat exchangers are connected with the secondary loop 5, the other sides of the two second heat exchangers are connected with a heat network 8, and heat exchange is performed through the secondary loop 5 and the heat network 8.

[0033] Specific implementation three: refer to Figs. 1-2 The embodiment is described as follows: the bottom of the lining tube 3 is provided with a communication hole 19, the bottom of the lining tube 3 is provided with the communication hole 19, so that the cooling effect of the water layer on the pool water 2 under the accident condition is ensured, under the accident condition of full-field power failure, the water layer 11 side is not injected with backwater, and the communication hole 19 ensures that the liquid levels on both sides of the pool water 2 and the water layer 11 are consistent, under the accident condition, the temperature of the pool water 2 in the reactor is gradually increased, the evaporation amount is also significantly increased, and the water capacity in the pool water 2 is significantly reduced, and the communication hole 19 at the bottom of the lining tube 3 can ensure that all the fluids in the water layer 11 can flow into the pool water 2, so as to reduce the temperature of the pool water 2.

[0034] Specific implementation four: refer to Figs. 1-2 The embodiment is described as follows: the position of the flow hole 16 of the lining tube 3 is provided with a cover plate 21, and the cover plate 21 is provided with an on-off switch, the flow hole 16 of the lining tube 3 is provided with the cover plate 21, the position and number of the flow holes can be controlled through the on-off switch of the cover plate 21, the flow field distribution in the water layer 11 is adjusted, and the heat insulation effect is optimized.

[0035] Specific implementation five: refer to Figs. 1-2 The embodiment is described as follows: a cooling method of a cooling device for pool-type low-temperature heat supply reactor concrete, which comprises the following steps:

[0036] Step 1: installing the cooling device in the pool water 2 of the heat supply reactor concrete 17;

[0037] Step 2: according to the requirement, opening the cover plate 21 of the flow hole 16 arranged at the corresponding position on the lining tube 3;

[0038] Step 3: the backwater of the primary loop purification system 6 is injected into the water layer 11 through the primary loop purification system backwater pipe 10;

[0039] Step 4: the injected fluid flows downward through the flow hole 16 on the lining tube 3 and flows into the pool water 2, and the fluid flowing into the heat supply reactor flows through the original circulation, and then flows into the primary loop 4 through the reactor core 1, the middle basket 18 and the water outlet pipe 20;

[0040] Step 5: After the heat exchange is completed, the fluid is re-injected into the pool water 2. Since the re-injected fluid is continuously heated outside, the temperature is certainly lower than the temperature of the fluid in the water layer 11, thereby achieving cooling of the water layer 11.

[0041] The above disclosed embodiments of the present application are only used to help explain the present application. The embodiments do not describe all the details and do not limit the present application to the specific embodiments. According to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application.

Claims

1. A cooling device for the concrete of a pool-type low-temperature heat supply reactor, characterized in that: The application relates to a cooling device for a heat supply reactor, which comprises a reactor core (1), pool water (2), a liner (3), a primary loop purification system (6), a primary loop (4), a primary loop purification system backwater pipe (10) and a primary loop backwater pipe (14), wherein the reactor core (1) is arranged in the pool water (2), the pool water (2) is filled in the liner (3), the liner (3) is arranged in the pool water (2), a gap is arranged between the outer part of the liner (3) and the inner part of concrete (17), a water layer (11) is arranged in the gap between the outer part of the liner (3) and the concrete (17), the contact surface between the water layer (11) and the concrete (17) is a pool wall surface (15), the input end of the primary loop (4) is connected with the primary loop backwater pipe (14), the output end of the primary loop backwater pipe (14) is arranged in the pool water (2), the output end of the primary loop purification system (6) is connected with the primary loop purification system backwater pipe (10), the output end of the primary loop purification system backwater pipe (10) is arranged in the water layer (11), the input end of the primary loop purification system (6) is connected with the primary loop (4), and flow holes (16) are arranged on the liner (3).

2. A cooling device for the concrete of a pool-type low temperature heat supply reactor according to claim 1, characterized in that: A purification pump (13) is arranged on the pipeline of the primary loop purification system (6).

3. A cooling device for the concrete of a pool type low temperature heat supply reactor according to claim 1, characterized in that: A middle hanging basket (18) is arranged on the reactor core (1) and connected with the input end of a water outlet pipe (20).

4. A cooling device for the concrete of a pool type low temperature heat supply reactor according to claim 3, characterized in that: The output end of the water outlet pipe (20) is connected with the input end of a first heat exchanger, the output end of the first heat exchanger is connected with the primary loop backwater pipe (14), a main pump (9) is arranged between the water outlet pipe (20) and the first heat exchanger, and the other side of the first heat exchanger is connected with a secondary loop (5).

5. A cooling means for the concrete of a pool type low temperature heat supply reactor according to claim 4, characterized in that: A secondary loop pump (12) is arranged on the secondary loop (5).

6. A cooling device for the concrete of a pool type low temperature heat supply reactor according to claim 4, characterized in that: The secondary loop (5) is connected with two second heat exchangers, and the other sides of the two second heat exchangers are connected with a heat network (8).

7. A cooling device for the concrete of a pool type low temperature heat supply reactor according to claim 1, characterized in that: A communication hole (19) is arranged at the bottom of the liner (3).

8. A cooling device for the concrete of a pool type low temperature heat supply reactor according to claim 1, characterized in that: A cover plate (21) is arranged at the position of the flow hole (16) of the liner (3).

9. A cooling device for the concrete of a pool type low temperature heat supply reactor according to claim 8, characterized in that: The cover plate (21) is provided with an on-off switch.

10. A cooling method for a cooling device for a pool-type low-temperature heat supply reactor concrete according to any one of claims 1 to 9, characterized by: The application further discloses a cooling method for a heat supply reactor. Step 1: installing the cooling device in the pool water (2) of the heat supply reactor concrete (17); Step 2: according to the requirement, opening the cover plate (21) of the flow hole (16) arranged at the corresponding position on the liner (3); Step 3: the backwater of the primary loop purification system (6) is injected into the water layer (11) through the primary loop purification system backwater pipe (10); Step 4: the injected fluid flows downwards through the flow hole (16) on the liner (3) and flows into the pool water (2), and the fluid flowing into the heat supply reactor is circulated through the original circulation, sequentially passes through the reactor core (1), the middle hanging basket (18) and the water outlet pipe (20) and flows into the primary loop (4); Step 5: after the heat exchange is completed, the fluid reflows into the pool water (2), and since the temperature of the backwater is lower than that of the fluid in the water layer (11) after the continuous heat exchange outside, the water layer (11) is cooled.

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