CN217972648U - Nuclear power plant warm drainage waste heat utilization system - Google Patents

Abstract

The utility model relates to a nuclear power plant warm drainage waste heat utilization system, nuclear power plant warm drainage waste heat utilization system includes sea water desalination device, vapor compression device and heat-retaining device, and sea water desalination device includes warm drainage circulation passageway and sea water circulation cavity of mutual isolation, and warm drainage circulation passageway is linked together with the outlet of the water circulation system of reactor, and sea water circulation cavity is linked together with the sea through the pipeline, and sea water desalination device can dilute the sea water in the sea water circulation cavity into fresh water steam and flow out; the steam compression device is communicated with the seawater circulation chamber and comprises a discharge port, fresh water steam can flow into the steam compression device, and the steam compression device can heat and compress the fresh water steam and discharge the fresh water steam from the discharge port; the heat storage device can be communicated with the discharge port of the vapor compression device, the fresh water vapor flowing out of the vapor compression device flows into the heat storage device, and the heat storage device absorbs and stores the heat of the fresh water vapor.

Description

Nuclear power plant warm drainage waste heat utilization system

Technical Field

The utility model relates to a nuclear power plant waste heat utilization technical field especially relates to a nuclear power plant warm drainage waste heat utilization system.

Background

Limited by the upper temperature limit of the nuclear fuel cladding material, and the extreme pressure parameters of the pressure vessel, the thermal energy utilization efficiency of a nuclear power plant is around 33%, which means that about 67% of the thermal energy is not available. The existing nuclear power plants are coastal power plants which are generally cooled by seawater direct current, and waste heat is discharged into the sea in a warm water discharge mode. However, the heat of warm drainage is large, the temperature rise is low, the warm drainage is directly discharged into the sea, a large amount of waste heat of a power plant is wasted, the water temperature of a local sea area is influenced, and the influence on the marine environment is caused.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a system for utilizing waste heat of warm drainage of a nuclear power plant, aiming at the problems that waste heat of warm drainage in the prior art cannot be effectively utilized and influences the environment.

The utility model provides a nuclear power plant warm drainage waste heat utilization system, nuclear power plant warm drainage waste heat utilization system includes:

the seawater desalination device comprises a warm water drainage circulation channel and a seawater circulation chamber which are isolated from each other, wherein the warm water drainage circulation channel is communicated with a water outlet of a water circulation system of the reactor, the seawater circulation chamber is communicated with the sea through a pipeline, and the seawater desalination device can desalinate seawater in the seawater circulation chamber into fresh water steam and flow out;

the steam compression device is communicated with the seawater circulation chamber and comprises a discharge port, the fresh water steam can flow into the steam compression device, and the steam compression device can heat and compress the fresh water steam and discharge the fresh water steam from the discharge port;

the heat storage device can be communicated with the discharge port of the vapor compression device, the fresh water vapor flowing out of the vapor compression device flows into the heat storage device, and the heat storage device absorbs the heat of the fresh water vapor and stores the heat.

In one embodiment, the heat storage device includes:

a storage tank for storing a heat storage substance;

the heating unit is communicated with the storage tank through a first flow path, the heating unit is communicated with the steam compression device through a second flow path, the heat storage substance can enter the heating unit through the first flow path, the fresh water steam can enter the heating unit through the second flow path, the heat storage substance and the fresh water steam carry out heat exchange in the heating unit, and the heat storage substance absorbing heat flows into the storage tank through a third flow path;

and the heat exchange unit is communicated with the storage tank through a fourth flow path, and the heat storage substance releases heat in the heat exchange unit.

In one embodiment, the storage tank comprises a first chamber and a second chamber which are independent from each other, a first outlet is arranged on the wall of the first chamber, a first inlet is arranged on the wall of the second chamber, the first chamber is used for storing the energy storage substance which does not absorb heat, and the second chamber is used for storing the energy storage substance which absorbs heat;

the heating unit has a second inlet, a third inlet, and a second outlet;

wherein the first outlet communicates with the second inlet to form the first flow path;

said third inlet communicating with a discharge of said vapor compression device to form said second flow path;

the second outlet communicates with the first inlet to form the third flow path.

In one embodiment, a third outlet is further arranged on a wall corresponding to the second chamber, the heat exchange unit is communicated with the third outlet to form the fourth flow path, and the heat storage material in the second chamber can flow into the heat exchange unit from the third outlet;

the heat storage device comprises a first cavity, a heat exchange unit and a second cavity, wherein the heat exchange unit is arranged in the first cavity, the first cavity is communicated with the second cavity, a fourth inlet is further formed in the wall, corresponding to the first cavity, of the cavity, the fourth inlet is communicated with the heat exchange unit to form a fifth flow path, and the fifth flow path is used for providing a circulation channel for heat storage substances to flow back to the first cavity after heat release.

In one embodiment, the heat exchange unit further has a drain port that communicates to a hot user.

In one embodiment, the heat storage device further comprises a vehicle, and the storage tank, the heating unit and the heat exchange unit are integrated on the vehicle.

In one embodiment, the seawater desalination apparatus comprises:

the hollow first shell, the inner cavity of the first shell is constructed with the warm water drainage flow channel;

the hollow second shell is sleeved outside the first shell, the outer wall of the first shell is spaced from the inner wall of the second shell, and the seawater circulation chamber is constructed between the first shell and the second shell.

In one embodiment, the seawater desalination apparatus further includes a permeable layer, the permeable layer is enclosed outside the first housing and spaced from the first housing, the permeable layer divides the seawater circulation chamber into a first chamber and a second chamber, the first chamber is located between the second chamber and the warm water drainage circulation channel, the first chamber is used for seawater circulation, the second chamber has a water absorption solution therein, warm water in the warm water drainage circulation channel is used for heating the seawater and forming fresh water vapor, and the permeable layer is used for separating salt and fresh water vapor in the seawater.

In one embodiment, the seawater desalination device is further provided with a seawater inlet pipe communicated with the first chamber, one end of the seawater inlet pipe, which is far away from the seawater desalination device, is connected with a seawater pretreatment device, and the seawater pretreatment device is used for filtering and pre-degassing seawater entering the seawater desalination device.

In one embodiment, a steam pipe is arranged on the second shell, and one end of the steam pipe, which faces away from the second shell, is communicated with the steam compression device;

and a saline water discharge pipeline is also arranged on the second shell and communicated with the first chamber.

The utility model has the advantages that:

the utility model provides a nuclear power plant warm drainage waste heat utilization system, be linked together water circulation system's outlet and the warm drainage circulation passageway in the sea water desalination device, because the circulating water that the water circulation system outlet discharged out is for having certain temperature also be the warm drainage of saying, be linked together sea water circulation cavity through pipeline and sea, in the sea water desalination device, the sea water in the sea water circulation cavity passes through the heat exchange with the warm drainage in the warm drainage circulation passageway, make the sea water in the sea water circulation cavity dilute into fresh water steam, flow into in the heat-retaining device after heating up and compressing fresh water steam through steam compression device, the heat-retaining device absorbs fresh water steam's heat and stores, and the heat that fresh water steam is released heat is the comdenstion water, can be used to municipal water supply. The heat stored in the energy storage device can be supplied to users needing heat sources. The temperature of the warm discharge water after heat exchange is reduced, and the warm discharge water can be discharged into the sea. Through the technical scheme of the utility model, retrieve warm drainage waste heat on the one hand and be used for sea water desalination, can also obtain fresh water and heat energy from it in addition, heat up to have the heat storage device after the high temperature, transport to peripheral user and utilize. The problems of comprehensive utilization of nuclear energy, remote nuclear power plant sites and non-concentration of peripheral hot users can be solved.

Drawings

FIG. 1 is a flow chart of nuclear power plant heat in the related art;

fig. 2 is a schematic structural diagram of a warm water discharge waste heat utilization system of a nuclear power plant provided by an embodiment of the present invention;

fig. 3 is a connection diagram between units in an energy storage device in a warm water discharge waste heat utilization system of a nuclear power plant provided by an embodiment of the present invention;

fig. 4 is a simplified schematic structural diagram of a seawater desalination device in a warm water discharge waste heat utilization system of a nuclear power plant provided by the embodiment of the present invention.

A seawater desalination plant 10; a first housing 101; a second housing 102; a permeation layer 103; a warm drain water circulation passage 104; a seawater flow-through chamber 105; a first chamber 1051; a second chamber 1052; a vapor compression device 20; a heat storage device 30; a storage tank 301; a heating unit 302; a heat exchange unit 303; a first flow path 304; the second flow path 305; a third flow path 306; a fourth flow path 307; a seawater pretreatment device 40; a brine discharge conduit 50; a drain 60 of the circulating water system; a primary steam pipe 70; a secondary steam pipe 80; a seawater inlet 90; a warm discharge water outlet 100.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, in the related art, a specific flow of heat transfer in a nuclear power plant is as follows: the reactor generates heat, the heat is brought to a steam generator (SG for short) through a primary loop driven by a main pump, the steam generator heats the feed water of the secondary loop into saturated steam, the steam enters a steam turbine through a main steam valve to do work, and the steam turbine drives a generator to generate electric energy. The exhaust steam which does work enters a condenser, circulating water (seawater) driven by a circulating pump condenses the exhaust steam into water, wherein the condenser and the circulating pump are connected to form a circulating water system, and thus the latent heat of the exhaust steam is transferred into the circulating water system and is brought into the open sea by the circulating water system. The condensed water enters the steam generator after passing through the water feeding pump and the heater to form complete steam-water circulation.

The circulating pump drives seawater to enter the condenser to cool the exhaust steam, the cooled seawater is discharged into the sea after the temperature of the cooled seawater is changed to high (warm water discharge), but the warm water discharge has large heat and low temperature rise, and the warm water discharge is directly discharged into the sea, so that a large amount of waste heat of a power plant is wasted, the water temperature of a local sea area is influenced, and the influence on the marine environment is caused.

Therefore, as shown in fig. 2 to 4, an embodiment of the present invention provides a thermal discharge waste heat utilization system of a nuclear power plant, the thermal discharge waste heat utilization system of the nuclear power plant includes a seawater desalination device 10, a vapor compression device 20 and a heat storage device 30, the seawater desalination device 10 includes a thermal discharge circulation channel 104 and a seawater circulation chamber 105 which are isolated from each other, the thermal discharge circulation channel 104 is communicated with a water outlet of a water circulation system of a reactor, the seawater circulation chamber 105 is communicated with the sea through a pipeline, and the seawater desalination device 10 can dilute seawater in the seawater circulation chamber 105 into fresh water vapor and flow out; the vapor compression device 20 is communicated with the seawater circulation chamber 105, the vapor compression device 20 comprises a discharge port, fresh water vapor can flow into the vapor compression device 20, and the vapor compression device 20 can heat and compress the fresh water vapor and discharge the fresh water vapor from the discharge port; the heat storage device 30 can be in communication with the discharge port of the vapor compression device 20, and the fresh water vapor flowing out of the vapor compression device 20 flows into the heat storage device 30, and the heat storage device 30 absorbs the heat of the fresh water vapor and stores the heat.

In the nuclear power plant warm drainage waste heat utilization system in the technical scheme, a water outlet of a water circulation system is communicated with a warm drainage circulation channel 104 in a seawater desalination device 10, circulating water discharged from the water outlet of the water circulation system has a certain temperature, namely warm drainage, a seawater circulation chamber 105 is communicated with the sea through a pipeline, in the seawater desalination device 10, seawater in the seawater circulation chamber 105 and warm drainage in the warm drainage circulation channel 104 are subjected to heat exchange, so that seawater in the seawater circulation chamber 105 is desalinated into fresh water steam, the fresh water steam is heated and compressed through a steam compression device 20 and flows into a heat storage device 30, the heat storage device 30 absorbs heat of the fresh water steam and stores the heat, and the fresh water steam is condensed into condensed water after releasing heat, and can be used for municipal water supply. The heat stored in the energy storage device can be supplied to users needing heat sources. The temperature of the warm discharge water after heat exchange is reduced, and the warm discharge water can be discharged into the sea. Through the technical scheme of the utility model, retrieve warm drainage waste heat on the one hand and be used for sea water desalination, can also obtain fresh water and heat energy from it in addition, heat up to have behind the high temperature in heat-retaining device 30, transport to peripheral user utilization. The problems of comprehensive utilization of nuclear energy, remote nuclear power plant sites and non-centralized peripheral heat users can be solved.

In some embodiments, as shown in fig. 3, the heat storage device 30 includes a storage tank 301, a heating unit 302 and a heat exchange unit 303, the storage tank 301 is used for storing a heat storage substance, and the heat storage substance may be a molten salt. The heating unit 302 is communicated with the storage tank 301 through the first flow path 304 so that the molten salt in the storage tank 301 can flow into the heating unit 302 through the first flow path 304; the heating unit 302 is communicated with the steam compression device 20 through a second flow path 305, so that the fresh water steam heated and pressurized by the steam compression device 20 flows into the heating unit 302 through the second flow path 305, the heat storage substance and the fresh water steam perform heat exchange in the heating unit 302, namely, the fresh water steam with higher temperature transfers heat to the molten salt, the molten salt after heat absorption is heated and flows into the storage tank 301 through a third flow path 306, the fresh water steam after heat release is condensed into condensed water, and the condensed water can be collected for municipal water supply; the heat exchange unit 303 is communicated with the storage tank 301 through a fourth flow path 307, so that the heat storage material, i.e. the molten salt, which absorbs heat flows into the heat exchange unit 303 through the fourth flow path 307 to exchange heat with a substance to be heated, such as heating water, domestic water, etc., and in the process, the heat storage material releases heat in the heat exchange unit 303 to heat the heating water or the domestic water and supply heat to users.

Specifically, the storage tank 301 includes a first chamber 1051 and a second chamber 1052 which are independent from each other, a first outlet is provided on a chamber wall corresponding to the first chamber 1051, a first inlet is provided on a chamber wall corresponding to the second chamber 1052, the first chamber 1051 is used for storing energy storage substances which do not absorb heat, and the second chamber 1052 is used for storing energy storage substances which absorb heat; the heating unit 302 has a second inlet, a third inlet, and a second outlet; wherein the first outlet communicates with the second inlet to form a first flow path 304; the third inlet communicates with the discharge of the vapor compression device 20 to form a second flow path 305; the second outlet communicates with the first inlet to form a third flow path 306. The non-endothermic energy storage substance, i.e. the molten salt with a relatively low temperature, flows out from the first outlet and then flows into the heating unit 302 from the second inlet through the pipeline, and the high-temperature and high-pressure fresh water vapor flowing out from the discharge port of the vapor compression device 20 flows into the heating unit 302 from the third inlet. The high-temperature and high-pressure fresh water steam in the heating unit 302 exchanges heat with the molten salt with lower temperature, the fresh water steam is condensed into condensed water after releasing heat, the temperature of the molten salt rises after absorbing heat, and the condensed water flows out of the second outlet of the heating unit 302 and enters the second chamber 1052 from the first inlet, so that the heated molten salt is stored in the second chamber 1052 of the storage tank 301.

Further, a third outlet is further arranged on the cavity wall corresponding to the second cavity 1052, the heat exchange unit 303 is communicated with the third outlet to form a fourth flow path 307, so that the heat storage substance in the second cavity 1052 can flow into the heat exchange unit 303 from the third outlet, that is, the heated molten salt can flow into the heat exchange unit 303 through the third outlet on the cavity wall corresponding to the second cavity 1052, so that the molten salt can exchange heat with the heating water or the domestic water to heat the heating water or the domestic water, and the heat release temperature of the molten salt is reduced; a fourth inlet is further disposed on a wall of the first chamber 1051, and the fourth inlet is communicated with the heat exchanging unit 303 to form a fifth flow path, and the fifth flow path is used to provide a flow channel for the heat storage material after heat release to flow back into the first chamber 1051. Through the structure, heat storage and cyclic utilization of the molten salt are realized. The heat exchange unit 303 further has a water outlet communicated to a user, so that the heated heating water or domestic water is discharged to the user needing water through the water outlet. Thus, the effective utilization of the heat of the warm discharge water is realized.

In one embodiment, the heat storage device 30 further comprises a vehicle, and the storage tank 301, the heating unit 302 and the heat exchanging unit 303 are integrated on the vehicle. The storage tank 301, the heating unit 302 and the heat exchange unit 303 are integrated on a vehicle, so that the storage tank 301 storing heat storage substances, the heating unit 302 capable of heating molten salt and the heat exchange unit 303 capable of heating water or domestic water are stored, heat storage is realized through movement of the vehicle, and stored heat is transported to a place needing to be used for effective utilization. The continuous operation of the energy storage device can be realized by connecting a plurality of storage tanks 301, heating units 302 and heat exchange units 303 in parallel. By means of vehicles, the heat storage device 30 can be conveyed to a place where a heat source is needed on the periphery of a nuclear power plant, and the simultaneous production, simultaneous storage and simultaneous conveying of water and heat under the condition of not arranging complex pipelines are achieved.

In one embodiment, as shown in fig. 4, the seawater desalination apparatus 10 includes a hollow first casing 101 and a hollow second casing 102, wherein a warm water discharge flow passage 104 is formed in an inner cavity of the first casing 101; the second housing 102 is sleeved outside the first housing 101, an outer wall of the first housing 101 is spaced apart from an inner wall of the second housing 102, and a seawater flowing chamber 105 is formed between the first housing 101 and the second housing 102. The seawater circulation chamber 105 is disposed around the periphery of the warm discharge water circulation passage 104, so that the warm discharge water can be preheated effectively, the seawater is evaporated, and the temperature of the warm discharge water in the warm discharge water circulation passage 104 is reduced to a temperature suitable for discharge. The device can effectively improve the preheating utilization rate of high-temperature drainage, can effectively reduce the temperature of low-temperature drainage, and can improve the seawater desalination efficiency.

In one embodiment, as shown in fig. 4, the seawater desalination apparatus 10 further includes a permeable layer 103, the permeable layer 103 is enclosed outside the first casing 101 and spaced apart from the first casing 101, the seawater circulation chamber 105 is divided into a first chamber 1051 and a second chamber 1052 by the permeable layer 103, the first chamber 1051 is located between the second chamber 1052 and a warm water drainage circulation channel 104, the first chamber 1051 is used for seawater circulation, the second chamber 1052 has an absorbent solution therein, warm water in the warm water drainage circulation channel is used for heating seawater and forming fresh water vapor, and the permeable layer 103 is used for separating salt and fresh water vapor in seawater. The water absorption solution may be LiBr solution, the LiBr solution has water absorption, seawater entering the first chamber 1051 is heated by warm water discharge and then evaporated into water vapor, and the water vapor may permeate into the second chamber 1052 from the permeable layer 103, and the LiBr solution has strong water absorption, so that the fresh water vapor permeating from the first chamber 1051 can be absorbed. The diluted LiBr solution exchanges heat with extracted steam of a power plant, the extracted steam of the power plant is cooled, and the diluted LiBr solution is concentrated to generate high-temperature steam. The high-temperature steam flows into the steam compression device 20 through the primary steam pipe 70, and flows into the heat storage device 30 through the secondary steam pipe 80 after being heated and pressurized. It is noted that the secondary steam pipe 80 is in communication with the discharge of the vapor compression device 20.

In one embodiment, as shown in fig. 4, the seawater desalination apparatus 10 is further provided with a seawater inlet pipe communicated with the first chamber 1051, one end of the seawater inlet pipe, which is away from the seawater desalination apparatus 10, is connected with a seawater pretreatment device 40, and the seawater pretreatment device 40 is used for filtering and pre-degassing seawater entering the seawater desalination apparatus 10. The seawater before entering the seawater desalination apparatus 10 is filtered and pre-degassed by the seawater pretreatment apparatus 40, so as to prevent bacteria, algae and microorganisms in the seawater from affecting the normal operation of the seawater desalination apparatus 10 and the process pipeline.

In one embodiment, as shown in fig. 4, a steam pipe is disposed on the second shell 102, where the steam pipe is a primary steam pipe 70, an end of the steam pipe facing away from the second shell 102 communicates with the steam compressing device 20, and the primary steam pipe 70 communicates with the second chamber 1052; the second housing 102 is further provided with a brine discharge pipe 50, and the brine discharge pipe 50 is communicated with the first chamber 1051, so that the desalinated brine is discharged out of the first chamber 1051 from the brine discharge pipe 50. The first shell 101 is provided with a warm water drainage inlet which is communicated with the water drainage outlet 60 of the circulating water system and is communicated with a warm water drainage circulation channel 104, and one end of the first shell 101, which is far away from the warm water drainage inlet, is provided with a warm water drainage outlet 100 and is communicated with the warm water drainage circulation channel 104; the second housing 102 is provided with a seawater inlet 90 in communication with the first chamber 1051.

The utility model provides a nuclear power plant warm drainage waste heat utilization system retrieves warm drainage waste heat on the one hand and is used for the sea water desalination, can also store in the heat storage device in the fresh water and the heat energy that can also acquire in the follow warm drainage in addition, heaies up to the high temperature after, transports to peripheral user and utilizes. The method can be used for solving the problems of comprehensive utilization of nuclear energy, remote nuclear power plant sites and non-concentration of peripheral heat users.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a nuclear power plant warm drainage waste heat utilization system which characterized in that, nuclear power plant warm drainage waste heat utilization system includes:

the seawater desalination device comprises a warm water drainage circulation channel and a seawater circulation chamber which are isolated from each other, the warm water drainage circulation channel is communicated with a water outlet of a water circulation system of the reactor, the seawater circulation chamber is communicated with the sea through a pipeline, and the seawater desalination device can dilute seawater in the seawater circulation chamber into fresh water steam and flow out;

the steam compression device is communicated with the seawater circulation chamber and comprises a discharge port, the fresh water steam can flow into the steam compression device, and the steam compression device can heat and compress the fresh water steam and discharge the fresh water steam from the discharge port;

the heat storage device can be communicated with the discharge port of the vapor compression device, the fresh water vapor flowing out of the vapor compression device flows into the heat storage device, and the heat storage device is used for absorbing and storing the heat of the fresh water vapor.

2. The system of claim 1, wherein the heat storage device comprises:

a storage tank for storing a heat storage substance;

the heating unit is communicated with the storage tank through a first flow path, the heating unit is communicated with the steam compression device through a second flow path, the heat storage substance can enter the heating unit through the first flow path, the fresh water steam can enter the heating unit through the second flow path, the heat storage substance and the fresh water steam carry out heat exchange in the heating unit, and the heat storage substance absorbing heat flows into the storage tank through a third flow path;

and the heat exchange unit is communicated with the storage tank through a fourth flow path, and the heat storage substance absorbs heat and releases heat in the heat exchange unit.

3. The system for utilizing the waste heat of warm discharged water from nuclear power plant as claimed in claim 2,

the storage tank comprises a first chamber and a second chamber which are mutually independent, a first outlet is formed in the wall of the first chamber, a first inlet is formed in the wall of the second chamber, the first chamber is used for storing energy storage substances which do not absorb heat, and the second chamber is used for storing the energy storage substances which absorb heat;

the heating unit has a second inlet, a third inlet, and a second outlet;

wherein the first outlet communicates with the second inlet to form the first flow path;

said third inlet communicating with a discharge of said vapor compression device to form said second flow path;

the second outlet communicates with the first inlet to form the third flow path.

4. The system for utilizing the waste heat of warm discharged water from nuclear power plant as claimed in claim 3,

a third outlet is further formed in the cavity wall corresponding to the second cavity, the heat exchange unit is communicated with the third outlet to form a fourth flow path, and the heat storage material in the second cavity can flow into the heat exchange unit from the third outlet;

and a fourth inlet is further arranged on the cavity wall corresponding to the first cavity, the fourth inlet is communicated with the heat exchange unit to form a fifth flow path, and the fifth flow path is used for providing the heat-released heat storage substance to flow back to the circulation channel in the first cavity.

5. The nuclear power plant warm discharge waste heat utilization system of claim 4, wherein the heat exchange unit further has a drain outlet, the drain outlet being communicated to a hot user.

6. The nuclear power plant warm discharge waste heat utilization system according to claim 2, wherein the heat storage device further comprises a vehicle, and the storage tank, the heating unit and the heat exchange unit are all integrated on the vehicle.

7. The system for utilizing the waste heat of warm discharged water of nuclear power plant according to any one of claims 1 to 6, wherein the seawater desalination device comprises:

the hollow first shell, the inner cavity of the first shell is constructed with the warm water drainage flow channel;

the hollow second shell is sleeved outside the first shell, the outer wall of the first shell is spaced from the inner wall of the second shell, and the seawater circulation chamber is constructed between the first shell and the second shell.

8. The system according to claim 7, wherein the seawater desalination device further comprises a permeable layer, the permeable layer is enclosed outside the first casing and spaced from the first casing, the permeable layer divides the seawater circulation chamber into a first chamber and a second chamber, the first chamber is located between the second chamber and the warm water circulation channel, the first chamber is used for seawater circulation, a water absorption solution is provided in the second chamber, warm water in the warm water circulation channel is used for heating seawater and forming fresh water vapor, and the permeable layer is used for separating salt and the fresh water vapor in the seawater.

9. The system for utilizing the waste heat of warm discharged water of the nuclear power plant as claimed in claim 8, wherein a seawater inlet pipe communicated with the first chamber is further arranged on the seawater desalination device, and one end of the seawater inlet pipe, which is far away from the seawater desalination device, is connected with a seawater pretreatment device which is used for filtering and pre-degassing seawater entering the seawater desalination device.

10. The nuclear power plant warm discharge waste heat utilization system according to claim 8, wherein a steam pipe is provided on the second casing, and an end of the steam pipe facing away from the second casing is communicated with the steam compression device;

and a saline water discharge pipeline is also arranged on the second shell and communicated with the first chamber.

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