CN210123170U

CN210123170U - Nuclear energy heating and heat storage system and urban heating network

Info

Publication number: CN210123170U
Application number: CN201920363080.5U
Authority: CN
Inventors: 韩雨辰; 白宁; 张谨奕; 张国强; 李京浩; 王含; 宗军
Original assignee: State Power Investment Group Science and Technology Research Institute Co Ltd
Current assignee: State Power Investment Group Science and Technology Research Institute Co Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2020-03-03
Anticipated expiration: 2029-03-21

Abstract

The utility model discloses a nuclear energy heating heat-retaining system and urban heating net. Wherein, nuclear energy heating heat-retaining system includes: the nuclear heating system comprises a low-temperature nuclear heating reactor, a first heat exchanger, a second heat exchanger and a heat exchange station, wherein the low-temperature nuclear heating reactor is connected with the first heat exchanger through a first heat exchange loop, the first heat exchanger is connected with the second heat exchanger through a second heat exchange loop, the second heat exchanger is connected with the heat exchange station through a third heat exchange loop, and the heat exchange station supplies heat to a user side; and the heat storage container is selectively communicated with the third heat exchange loop so as to store residual heat generated by the low-temperature nuclear heat supply reactor when being communicated with the third heat exchange loop or provide heat supplement for heat supply of a user terminal. The utility model discloses a nuclear energy heating heat-retaining system can ensure the heating heat load that the user needs and constantly when changing along with outdoor temperature's change, keeps the output temperature and the output heat of low temperature nuclear heating heap.

Description

Nuclear energy heating and heat storage system and urban heating network

Technical Field

The utility model relates to a nuclear heating technical field, in particular to nuclear energy heating heat-retaining system and urban heating net.

Background

The low-temperature nuclear heating reactor gradually replaces the traditional coal-fired boiler as the heat source of the urban central heating system due to the technical safety and good economy. The low-temperature nuclear heating reactor is used as a heat source of a city central heating system, is a new way for solving the problem of city energy supply, reducing transportation pressure and eliminating environmental pollution caused by coal burning, and is also the key point for controlling atmospheric pollution at the present stage. However, the heat demand of users fluctuates, particularly, the day and night difference of industrial heat is large, and the problems can cause the problem that the heat supply quantity is not matched with the heat consumption of the users when the nuclear reactor continuously and stably operates. Meanwhile, the nuclear heat supply reactor is a heat supply device which needs to operate for a long time, meanwhile, in most areas in the north, heat supply is usually only about half a year, and at the moment, if the nuclear heat supply reactor stops heat supply in a shutdown mode, huge manpower and financial resources can be lost.

By connecting a phase-change heat storage system in parallel between the conventional island steam generator and a heat user, when the heat is used at night or in a heat valley section, redundant heat energy is stored in the phase-change heat storage system. The stored heat energy is released in the daytime or in the peak period of the heat energy demand. The heat storage system is internally formed by connecting a fixed heat storage unit and a plurality of movable heat storage units in parallel, and when areas without heat pipelines or areas far away need heat energy, the movable heat storage units can be transported to the places needing heat by a trailer to form a movable heat storage-supply mode. However, nuclear energy heating is a stable heating mode with large heating load, and phase change energy storage is only suitable for energy storage heating systems in small scale and small area due to high heat storage cost, and cannot be adapted to nuclear energy heating at all, so that the application prospect is not provided. The movable heat storage unit is also an energy storage and heat supply mode in a small scale and a small area, can not be adapted to nuclear energy heat supply, and has no application prospect. The phase change energy storage has the problem that the heat storage and release power is gradually reduced in the heat storage and release process, the influence on a heat supply network is large, and the requirement on a system is complex.

For the low-temperature nuclear heating reactor, from the perspective of ensuring safe and economic operation, only starting or closing is performed in the operation process, so that the low-temperature nuclear heating reactor only has two states of full load and zero load as a single heat source, namely the temperature of hot water supply and return water output by the nuclear heating reactor is constant, the output heat is constant, and the output is not adjustable. In actual production life, the heating heat load required by a user changes constantly along with the change of outdoor temperature, and for the existing urban central heating system taking coal-fired, oil-fired and gas-fired boilers as main heating heat sources, the heat output by the conventional heat sources and the temperature of supplied water and returned water output by the conventional heat sources can change at any time along with the change of the outdoor temperature so as to adapt to the change of the heating heat load required by the user. However, for the urban centralized heating system using the low-temperature nuclear heating reactor as an independent heat source, the contradiction between the non-adjustability of the output of the low-temperature nuclear heating reactor and the fluctuation of the heating demand of the user cannot be effectively solved at present.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the utility model discloses a first aim at provides a nuclear heating heat-retaining system. The system can ensure that the heating heat load required by a user constantly changes along with the change of the outdoor temperature, and simultaneously keeps the output temperature and the output heat of the low-temperature nuclear heating reactor.

A second object of the present invention is to provide a city heating network.

In order to achieve the above object, a first aspect of the present invention discloses a nuclear heating heat storage system, including: the nuclear heating system comprises a low-temperature nuclear heating reactor, a first heat exchanger, a second heat exchanger and a heat exchange station, wherein the low-temperature nuclear heating reactor is connected with the first heat exchanger through a first heat exchange loop, the first heat exchanger is connected with the second heat exchanger through a second heat exchange loop, the second heat exchanger is connected with the heat exchange station through a third heat exchange loop, and the heat exchange station supplies heat to a user side; at least one thermal storage vessel in selective communication with the third heat exchange loop to store residual heat generated by the low temperature nuclear heat supply reactor when in communication with the third heat exchange loop, or to provide a heat supplement for user side heating.

The utility model discloses a nuclear heating heat-retaining system, the heating heat load that can ensure the user needs is when changing constantly along with outdoor temperature's change, keeps the output temperature and the output heat of low temperature nuclear heating heap. The characteristic that nuclear heating heap can not variable operating mode usually adjusts has been compensatied, in addition, in non-heating season, need not to close low temperature nuclear heating heap, can get up the heat energy storage that nuclear heating heap produced and supply with other users of heating season and use, can enlarge the heating area effectively, the problem that nuclear heating heap can not continuous operation usually in one year has been solved simultaneously, promote nuclear heating heat-retaining system's efficiency, furthermore, can play in heating season, the heat supply peak shaving effect of urban heat supply network, can realize the exothermic function in the limit storage limit of the season water conservation heat-retaining of striding on a large scale, promote nuclear heating heat-retaining system's suitability.

Further, the at least one heat storage container is multiple, and the multiple heat storage containers are connected in parallel.

Furthermore, a first valve (3) and a first water pump (4) which are connected in series are arranged on the water outlet side of the first heat exchange loop, and a second valve (2) is arranged on the water return side of the first heat exchange loop; a third valve (7) and a second water pump (9) which are connected in series are arranged on the water outlet side of the second heat exchange loop, and a fourth valve (6) is arranged on the water return side of the second heat exchange loop; and a fifth valve (12) and a sixth valve (24) which are connected in series are arranged on the water outlet side of the third heat exchange loop, and a seventh valve (11), an eighth valve (23) and a third water pump (13) which are connected in series are arranged on the water return side of the third heat exchange loop.

Further, the heat exchange station is communicated with a user side through a city heat supply loop pump (31).

Furthermore, a ninth valve (29) and a tenth valve (16) are connected in series on the water return side of the heat storage container, the other end of the ninth valve (29) is connected with a direct node of the eighth valve (23) and the third water pump (13), an eleventh valve (20), a twelfth valve (33), a fourth water pump (25) and a thirteenth valve (21) are connected in series on the water outlet side of the heat storage container, and the other end of the thirteenth valve (21) is connected with a node between the fifth valve (12) and the sixth valve (24).

Further, still include: and the branch circuit is connected with the ninth valve (29) in parallel and is provided with a fourteenth valve (27), a fifth water pump (22) and a fifteenth valve (35) which are connected in series.

Further, still include: and the control component is respectively connected with the nuclear heating system and the heat storage container so as to control the nuclear heating system and the heat storage container.

Further, the heat storage container is a pool, a water tank or a lake.

The second aspect of the utility model discloses a city heating net, include: a nuclear heating thermal storage system according to the first aspect described above. The urban heating network can ensure that the heating heat load required by a user constantly changes along with the change of the outdoor temperature, and simultaneously keeps the output temperature and the output heat of the low-temperature nuclear heating reactor. The characteristic that nuclear heating heap can not variable operating mode usually adjusts has been compensatied, in addition, in non-heating season, need not to close low temperature nuclear heating heap, can get up the heat energy storage that nuclear heating heap produced and supply with other users of heating season and use, can enlarge the heating area effectively, the problem that nuclear heating heap can not continuous operation usually in one year has been solved simultaneously, promote nuclear heating heat-retaining system's efficiency, furthermore, can play in heating season, the heat supply peak shaving effect of urban heat supply network, can realize the exothermic function in the limit storage limit of the season water conservation heat-retaining of striding on a large scale, promote nuclear heating heat-retaining system's suitability.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a block diagram of a nuclear heating thermal storage system according to an embodiment of the present invention;

FIG. 2 is a schematic view of a nuclear heating thermal storage system according to an embodiment of the present invention;

fig. 3 to 7 are schematic diagrams of the operation process of the nuclear heating and heat storage system according to an embodiment of the present invention.

Description of reference numerals:

a nuclear heating reactor 1 (heat source), a second valve 2, a first valve 3, a nuclear heating loop water pump 4, a nuclear heating loop and micro-pressure loop heat exchanger 5, a micro-pressure loop hot water valve (fourth valve) 6, a micro-pressure loop cold water valve (third valve) 7, a micro-pressure loop surge tank 8, a micro-pressure loop water pump 9, a micro-pressure loop and heating station loop heat exchanger 10, a heating station loop valve (seventh valve) 11, a heating station loop valve (fifth valve) 12, a heating station loop water pump 13, a valve 14, a valve 15, a valve (tenth valve) 16, a heat storage container water distributor 17, a plurality of heat storage container loops 18, a heat storage container water distributor 19, a valve (eleventh valve) 20, a valve (thirteenth valve) 21, a non-heating season heat storage container priming pump 22, an urban heat exchange station loop valve (eighth valve) 23, an urban heat exchange station loop valve (sixth valve) 24, a heating season heat storage container priming pump 25, Accumulator tank No. two 26, valve (fourteenth valve) 27, accumulator tank No. one 28, valve (ninth valve) 29, city heat exchange station 30, city heating loop pump 31, city 32, valve (twelfth valve) 33, valve 34, and valve (fifteenth valve) 35.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The following describes a nuclear heating heat storage system and a city heating network according to the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a block diagram of a nuclear heating thermal storage system according to an embodiment of the present invention. As shown in fig. 1 in combination with fig. 2, a nuclear heating thermal storage system 100 according to an embodiment of the present invention includes: a nuclear heating system 110 and at least one thermal storage vessel 120.

The nuclear heating system 110 includes a low-temperature nuclear heat supply reactor (nuclear heat supply reactor 1 for short), a first heat exchanger (heat exchanger 5), a second heat exchanger (heat exchanger 10) and a heat exchange station (city heat exchange station 30), the low-temperature nuclear heat supply reactor 1 is connected with the first heat exchanger 5 through a first heat exchange loop, the first heat exchanger 5 is connected with the second heat exchanger 10 through a second heat exchange loop, the second heat exchanger 10 is connected with the heat exchange station 30 through a third heat exchange loop, and the heat exchange station 30 supplies heat for a user side (such as a city 32). At least one thermal storage vessel (e.g., thermal storage vessel 26, thermal storage vessel 28) is selectively in communication with the third heat exchange loop to store excess heat generated by the low temperature nuclear powered reactor 1 when in communication with the third heat exchange loop, or to provide a heat supplement for heating a user terminal 32.

As shown in fig. 2, there are a plurality of thermal storage containers, and a plurality of thermal storage containers are connected in parallel, such as a thermal storage container 26 and a thermal storage container 28. Referring to fig. 2 again, a first valve (3) and a first water pump (4) which are connected in series are arranged on the water outlet side of the first heat exchange loop, and a second valve (2) is arranged on the water return side of the first heat exchange loop; a third valve (7) and a second water pump (9) which are connected in series are arranged on the water outlet side of the second heat exchange loop, and a fourth valve (6) is arranged on the water return side of the second heat exchange loop; a fifth valve (12) and a sixth valve (24) which are connected in series are arranged on the water outlet side of the third heat exchange loop, and a seventh valve (11), an eighth valve (23) and a third water pump (13) which are connected in series are arranged on the water return side of the third heat exchange loop. In addition, the heat exchange station 30 is communicated with the user side through a city heat supply loop pump (31).

Further, taking the heat storage container 26 as an example, a ninth valve (29) and a tenth valve (16) are connected in series on the water return side of the heat storage container 26, the other end of the ninth valve (29) is connected with a node where the eighth valve (23) and the third water pump (13) are directly connected, an eleventh valve (20), a twelfth valve (33), a fourth water pump (25) and a thirteenth valve (21) are connected in series on the water outlet side of the heat storage container, and the other end of the thirteenth valve (21) is connected with a node between the fifth valve (12) and the sixth valve (24).

Further, as shown in fig. 2, the method further includes: and the branch circuit is connected with the ninth valve (29) in parallel and is provided with a fourteenth valve (27), a fifth water pump (22) and a fifteenth valve (35) which are connected in series.

The utility model discloses nuclear heating heat-retaining system still can include: a control component connected to the nuclear heating system 110 and the thermal storage container 120, respectively, to control the nuclear heating system 110 and the thermal storage container 120, for example: and controlling the valves and the water pump.

In the embodiment of the present invention, the thermal storage container 120 is, for example, a pool, a water tank or a lake, which is a seasonal thermal storage container, that is: the thermal energy stored for one season may be used for a later season.

Through striding season heat accumulation container, store the heat energy that low temperature nuclear heating heap produced in non-heating season, simultaneously in heating season, the heat accumulation container can ensure that the heating heat load that the user needs keeps the output temperature and the output heat of low temperature nuclear heating heap constantly when changing along with outdoor temperature's change to can realize the limit of extensive water heat-retaining and store the exothermic function simultaneously.

The utility model discloses nuclear heating heat-retaining system 100's theory of operation as follows:

the large-scale trans-seasonal water-saving and heat storage mainly utilizes the fact that water has high specific heat capacity and heat storage density, and heat energy is stored by utilizing heating water to increase the temperature of the water. The application form includes but is not limited to a pool type, a water tank type and other modes. The low-temperature nuclear heating reactor is a novel power device which utilizes nuclear energy as a heat source and is equivalent to a large-scale hot water boiler on a centralized heating system. The low-temperature nuclear heating reactor is the pilot and main force of the nuclear heating device developed in China, and because the water supply temperature required by a heating system is low (generally not more than 120 ℃), the nuclear reactor which is specially used for supplying heat but not generating electricity can work under the conditions of low temperature and low pressure, and is greatly different from the nuclear reactor used for a nuclear power station. Its equipment and system are simple, safe and reliable, mature in technology, less in investment and quick in construction. The low-temperature nuclear heating reactor gradually replaces the traditional coal-fired boiler as the heat source of the urban central heating system due to the technical safety and good economy.

The system comprises 3 working modes, namely a heating season heating mode, a non-heating season heat storage mode and a heating season heating peak regulation mode.

In a heating season heating mode, hot water generated by a low-temperature nuclear heating reactor supplies heat to users through three times of heat exchange, wherein the output power of the low-temperature nuclear heating reactor 1 is stable, but the heating power can be adjusted in a second heat exchange loop, and hot water in a plurality of heat storage containers can be sequentially gathered into a loop between a heat exchanger II and a heat exchanger III through opening related valves through a water pump to provide redundant heat for heating of the users.

In the non-heating season heat storage mode, hot water produced by the low-temperature nuclear heat supply reactor 1 is stored in a large-scale season-crossing water-saving heat storage container through twice heat exchange, wherein the output power of the low-temperature nuclear heat supply reactor 1 is stable, the heat storage power is also stable, a plurality of containers are connected in a parallel mode in the system, the hot water used for heat storage is divided into a plurality of branches in a return water main pipe to store the hot water simultaneously, and the heat produced by the nuclear heat supply reactor is stored in the large-scale season-crossing heat storage container.

The peak regulation mode of heating in the heating season is carried out simultaneously with the heating mode of heating season in most of time, and in the heating season, the heat storage container can ensure that the heating heat load required by a user is changed along with the change of outdoor temperature all the time, and simultaneously the output temperature and the output heat of the low-temperature nuclear heating reactor are kept. The heating peak regulation mode is started in two scenes, namely, the heating heat load required by a user is changed constantly along with the change of the outdoor temperature; and secondly, when the peak is regulated by heating. These two scenarios may exist separately or may coexist in two ways. The specific operation principle is as follows: the output power of the nuclear heat supply reactor is unchanged, so that the basic load for supplying heat to users is ensured, but the heat storage container can supply heat to redundant users, and the output power of the heat storage container is adjusted. And can also play a role in adjusting the heating load in the whole heating loop.

The low-temperature nuclear heat supply reactor 1 is a nuclear heat supply reactor for heating water, and is not limited to a pool type or a shell type reactor. The temperature of the outlet water is 80-200 ℃, and the temperature of the return water after passing through the heat exchanger is 50-150 ℃.

The heat storage container is a plurality of heat storage containers connected in parallel, can be a large-scale water pool, a water tank, a natural or artificial lake and the like, and can be used for storing heat.

In the heating season, water is heated by the nuclear heating reactor 1, flows through the first valve 3 and the water pump 4 of the nuclear heating reactor loop, exchanges heat with working medium water in the loop through the heat exchanger 5, the temperature is reduced, and the temperature of the working medium water in the loop is increased. After the temperature of water in the nuclear heating reactor loop is reduced, the water flows back to the nuclear heating reactor for heating through a second valve 2 at the inlet of the nuclear heating reactor loop. The water in the loop keeps positive pressure due to the action of the pressure stabilizing tank, and the temperature of the water is between 200 and 110 ℃. Working medium water in the loop exchanges heat with a heat exchanger 5 between the nuclear heat supply reactor loops through a water valve 7 and a water pump 9, the heat is exchanged through a heat exchanger 10 between the nuclear heat supply reactor loops after the temperature is increased, the temperature is reduced, heat is transferred to the working medium water in the heat supply station loops, then the working medium water flows through a water valve 6 to enter the heat exchanger between the nuclear heat supply reactor loops, and the temperature is increased again. In the heating season, the

valves

34, 27, 35, and 22 are closed, and the heat storage container starts to discharge water. The water pump 22 is closed, the water pumps 13 and 25 are opened, and water in the loop of the heat exchange station flows through the heat exchanger 10 connected with the loop, the temperature is increased, the water is converged with water supply of the

heat storage containers

26, 18 and 28, flows into the heat exchange station 30, exchanges heat with city heating backwater, and the temperature is reduced. The city heating backwater passes through the heat exchange station 30 and flows through the city heating loop water pump 31 to supply heat to the city. While the hot water in the

thermal storage containers

18, 26, 28 flows into the city heat exchange station 30 by means of the water pump 25. The water inlet amount of the two containers can be controlled by controlling the opening degree of the

valves

34 and 20, and water can be supplied independently or simultaneously. After the hot water passes through the urban heat exchange station 30, a part of the cooling water flows back to the container, and a part of the cooling water returns to the heat exchanger 10 for circulating heating.

In non-heating seasons, water is heated by the nuclear heating reactor 1, flows through the second valve 2 and the water valve 4 at the outlet of the nuclear heating reactor loop, exchanges heat with working medium water in the loop through the heat exchanger 5, reduces the temperature, and increases the temperature of the working medium water in the loop. The temperature of water in the nuclear heating reactor loop is reduced and then flows back to the nuclear heating reactor for heating through a first valve 3 at the inlet of the nuclear heating reactor loop. The water in the loop keeps positive pressure due to the action of the pressure stabilizing tank, and the temperature of the water is between 200 and 110 ℃. Working medium water in the loop exchanges heat with a heat exchanger 5 between the nuclear heat supply reactor loops through a water valve 6 and a water pump 9, the heat is exchanged through a heat exchanger 10 between the nuclear heat supply reactor loops after the temperature is increased, the temperature is reduced, heat is transferred to the working medium water in the heat supply station loops, then the working medium water flows through a water valve 7 to enter the heat exchanger between the nuclear heat supply reactor loops, and the temperature is increased again. In the non-heating season, the

valves

23, 24, 29, 33, and 21 are closed, and the heat storage container starts storing water. The water pump 22 is started, the water pumps 13 and 25 are closed, the cold water in the No. 28 heat storage container passes through the

valves

15 and 26 and the cold water in the No. 16 heat storage container passes through the valve 16, the cold water in the two heat storage containers flows through the

water valves

27 and 35 of the water pump 22 and then flows through the valve 11, the cold water enters the heat exchanger 10, and the temperature of the cold water is increased after the heat exchange with the water in the loop. The water with the increased temperature passes through the valve 12 and the valve 34 and then flows into two paths, one path flows into the 28 th container through the valve 14, and the other path flows into the 26 th heat accumulation container through the valve 20. The other heat storage containers 18 connected in parallel are similar, a plurality of heat storage containers are connected in parallel and then connected into a heating station loop, and heat storage is carried out simultaneously or sequentially under the control of a valve.

In the peak regulation process in the heating season, the heat storage container can play a role in peak regulation. In the heating season, water is heated by the nuclear heating reactor 1, flows through the first valve 3 and the water pump 4 of the nuclear heating reactor loop, exchanges heat with working medium water in the loop through the heat exchanger 5, the temperature is reduced, and the temperature of the working medium water in the loop is increased. After the temperature of water in the nuclear heating reactor loop is reduced, the water flows back to the nuclear heating reactor for heating through a second valve 2 at the inlet of the nuclear heating reactor loop. The water in the loop keeps positive pressure due to the action of the pressure stabilizing tank, and the temperature of the water is between 200 and 110 ℃. Working medium water in the loop exchanges heat with a heat exchanger 5 between the nuclear heat supply reactor loops through a water valve 7 and a water pump 9, the heat is exchanged through a heat exchanger 10 between the nuclear heat supply reactor loops after the temperature is increased, the temperature is reduced, heat is transferred to the working medium water in the heat supply station loops, then the working medium water flows through a water valve 6 to enter the heat exchanger between the nuclear heat supply reactor loops, and the temperature is increased again. In the heating season, the

valves

34, 27, 35, and 22 are closed, and the heat storage container starts to discharge water. The water pump 22 is closed, the water pumps 13 and 25 are opened, and the hot water flow for supplying heat to the working medium is adjusted by adjusting the power of the water pump 25. The water in the loop of the heat exchange station is passed through the heat exchanger 10 connected to the loop, the temperature is raised, and the water is joined with the water supply of the

heat storage containers

26, 18 and 28, flows into the heat exchange station 30, and exchanges heat with the city heating return water, and the temperature is lowered. The city heating backwater passes through the heat exchange station 30 and flows through the city heating loop water pump 31 to supply heat to the city. While the hot water in the

thermal storage containers

18, 26, 28 flows into the city heat exchange station 30 by means of the water pump 25. The water inlet amount of a plurality of containers can be controlled by controlling the opening degree of the

valves

34 and 20, and water can be supplied independently or simultaneously, so that the peak regulation effect is achieved. After the hot water passes through the urban heat exchange station 30, a part of the cooling water flows back to the container, and a part of the cooling water returns to the heat exchanger 10 for circulating heating. The combined control of the water pump 25 and the

valves

34 and 20 can play a role in peak regulation.

As shown in fig. 3, the nuclear heating reactor 1 is used to heat water. The temperature of the outlet water is 80-200 ℃, and the temperature of the return water after passing through the heat exchanger is 50-150 ℃.

valves

heat storage containers

thermal storage containers

valves

As shown in figure 4, in non-heating seasons, water is heated by the nuclear heating reactor 1, flows through the second valve 2 and the water valve 4 at the outlet of the nuclear heating reactor loop, exchanges heat with working medium water in the loop through the heat exchanger 5, reduces the temperature, and increases the temperature of the working medium water in the loop. The temperature of water in the nuclear heating reactor loop is reduced and then flows back to the nuclear heating reactor for heating through the first valve 3 at the inlet of the nuclear heating reactor loop. The water in the loop keeps positive pressure due to the action of the pressure stabilizing tank, and the temperature of the water is between 200 and 110 ℃. Working medium water in the loop exchanges heat with a heat exchanger 5 between the nuclear heat supply reactor loops through a water valve 6 and a water pump 9, the heat is exchanged through a heat exchanger 10 between the nuclear heat supply reactor loops after the temperature is increased, the temperature is reduced, heat is transferred to the working medium water in the heat supply station loops, then the working medium water flows through a water valve 7 to enter the heat exchanger between the nuclear heat supply reactor loops, and the temperature is increased again. In the non-heating season, the

valves

water valves

As shown in fig. 5, during peak shaving in the heating season, the thermal storage vessel may perform a peak shaving function. In the heating season, water is heated by the nuclear heating reactor 1, flows through the first valve 3 and the water pump 4 of the nuclear heating reactor loop, exchanges heat with working medium water in the loop through the heat exchanger 5, the temperature is reduced, and the temperature of the working medium water in the loop is increased. After the temperature of water in the nuclear heating reactor loop is reduced, the water flows back to the nuclear heating reactor for heating through a second valve 2 at the inlet of the nuclear heating reactor loop. The water in the loop keeps positive pressure due to the action of the pressure stabilizing tank, and the temperature of the water is between 200 and 110 ℃. Working medium water in the loop exchanges heat with a heat exchanger 5 between the nuclear heat supply reactor loops through a water valve 7 and a water pump 9, the heat is exchanged through a heat exchanger 10 between the nuclear heat supply reactor loops after the temperature is increased, the temperature is reduced, heat is transferred to the working medium water in the heat supply station loops, then the working medium water flows through a water valve 6 to enter the heat exchanger between the nuclear heat supply reactor loops, and the temperature is increased again. In the heating season, the

valves

heat storage containers

thermal storage containers

valves

34 and 20, and the water can be supplied independently or simultaneously, so that the peak regulation effect is achieved. After the hot water passes through the urban heat exchange station 30, a part of the cooling water flows back to the container, and a part of the cooling water returns to the heat exchanger 10 for circulating heating. The combined control of the water pump 25 and the

valves

34 and 20 can play a role in peak regulation.

As shown in fig. 6, in the non-heating season heat storage mode, fig. 4 shows a parallel connection, starting from the left port of the valve 34, which is the first interface between the heat storage containers and the loops of the heat exchanger 10 and the urban heat exchange station 30, the pipeline from the valve 34 is divided into a plurality of branches to be led into the upper layers of the heat storage containers, and in the non-heating season heat storage mode, the plurality of branches behind the valve 34 are led into hot water to be stored. In the heat storage mode, multiple branches will pass hot water at the same time, with the same flow rate. The second interface between the heat storage containers and the loop of the heat exchanger 10 and the loop of the urban heat exchange station 30 is from the left port of the valve 27, the left port of the valve 27 is a water collecting point of a plurality of branches led out from the lower layers of the heat storage containers, cold water led out from the lower layers of the heat storage containers is led into a pipeline behind the valve 27 in the heat storage mode in the non-heating season, and the front branches of the left port of the valve 27 simultaneously pass through the cold water with the same flow.

As shown in fig. 7, in the heating season heat release mode and the peak shaving mode, fig. 5 shows parallel connection, starting from the left port of the valve 29, the first interface between the heat storage containers and the loops of the heat exchanger 10 and the urban heat exchange station 30 is provided, the pipeline from the valve 29 is divided into a plurality of branches to be introduced into the lower layer of the heat storage containers, and the plurality of branches behind the valve 29 in the heating season heat release mode and the peak shaving mode are introduced into cold return water between the loops of the heat exchanger 10 and the urban heat exchange station 30. Multiple branches will pass cold water at the same time, with the same flow rate. The second interface between the heat storage containers and the loops of the heat exchanger 10 and the urban heat exchange station 30 is from the left port of the valve 33, the left port of the valve 33 is a water collection point of a plurality of branches led out from the upper layers of the heat storage containers, hot water led out from the upper layers of the heat storage containers is led into a pipeline behind the valve 33, and the plurality of branches in front of the left port of the valve 33 simultaneously pass through the hot water stored in the upper layers of the heat storage containers and have the same flow.

The utility model discloses nuclear heating heat-retaining system can ensure that the heating heat load that the user needs is when changing constantly along with outdoor temperature's change, keeps the output temperature and the output heat of low temperature nuclear heating heap. The characteristic that nuclear heating heap can not variable operating mode usually adjusts has been compensatied, in addition, in non-heating season, need not to close low temperature nuclear heating heap, can get up the heat energy storage that nuclear heating heap produced and supply with other users of heating season and use, can enlarge the heating area effectively, the problem that nuclear heating heap can not continuous operation usually in one year has been solved simultaneously, promote nuclear heating heat-retaining system's efficiency, furthermore, can play in heating season, the heat supply peak shaving effect of urban heat supply network, can realize the exothermic function in the limit storage limit of the season water conservation heat-retaining of striding on a large scale, promote nuclear heating heat-retaining system's suitability.

Further, the embodiment of the utility model discloses a city heating net, include: the nuclear heating and heat storage system according to any one of the above embodiments. The urban heating network can ensure that the heating heat load required by a user constantly changes along with the change of the outdoor temperature, and simultaneously keeps the output temperature and the output heat of the low-temperature nuclear heating reactor. The characteristic that nuclear heating heap can not variable operating mode usually adjusts has been compensatied, in addition, in non-heating season, need not to close low temperature nuclear heating heap, can get up the heat energy storage that nuclear heating heap produced and supply with other users of heating season and use, can enlarge the heating area effectively, the problem that nuclear heating heap can not continuous operation usually in one year has been solved simultaneously, promote nuclear heating heat-retaining system's efficiency, furthermore, can play in heating season, the heat supply peak shaving effect of urban heat supply network, can realize the exothermic function in the limit storage limit of the season water conservation heat-retaining of striding on a large scale, promote nuclear heating heat-retaining system's suitability.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or connected internally to two elements, directly or indirectly through intervening media, and those skilled in the art will understand the specific meaning of the terms as they are used in a specific context

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A nuclear heating thermal storage system, comprising:

the nuclear heating system comprises a low-temperature nuclear heating reactor, a first heat exchanger, a second heat exchanger and a heat exchange station, wherein the low-temperature nuclear heating reactor is connected with the first heat exchanger through a first heat exchange loop, the first heat exchanger is connected with the second heat exchanger through a second heat exchange loop, the second heat exchanger is connected with the heat exchange station through a third heat exchange loop, and the heat exchange station supplies heat to a user side;

at least one thermal storage vessel in selective communication with the third heat exchange loop to store residual heat generated by the low temperature nuclear heat supply reactor when in communication with the third heat exchange loop, or to provide a heat supplement for user side heating.

2. The nuclear heating thermal storage system of claim 1 wherein the at least one thermal storage vessel is a plurality of thermal storage vessels, the plurality of thermal storage vessels being connected in parallel.

3. The nuclear heating thermal storage system of claim 1,

a first valve (3) and a first water pump (4) which are connected in series are arranged on the water outlet side of the first heat exchange loop, and a second valve (2) is arranged on the water return side of the first heat exchange loop;

a third valve (7) and a second water pump (9) which are connected in series are arranged on the water outlet side of the second heat exchange loop, and a fourth valve (6) is arranged on the water return side of the second heat exchange loop;

and a fifth valve (12) and a sixth valve (24) which are connected in series are arranged on the water outlet side of the third heat exchange loop, and a seventh valve (11), an eighth valve (23) and a third water pump (13) which are connected in series are arranged on the water return side of the third heat exchange loop.

4. The nuclear heating thermal storage system of claim 1 wherein the heat exchange station communicates with a customer premises via a district heating loop pump (31).

5. The nuclear heating thermal storage system according to claim 3, wherein a ninth valve (29) and a tenth valve (16) are connected in series on the water return side of the thermal storage container, the other end of the ninth valve (29) is connected with a direct node of the eighth valve (23) and the third water pump (13), an eleventh valve (20), a twelfth valve (33), a fourth water pump (25) and a thirteenth valve (21) are connected in series on the water outlet side of the thermal storage container, and the other end of the thirteenth valve (21) is connected with a node between the fifth valve (12) and the sixth valve (24).

6. The nuclear heating thermal storage system of claim 5, further comprising:

and the branch circuit is connected with the ninth valve (29) in parallel and is provided with a fourteenth valve (27), a fifth water pump (22) and a fifteenth valve (35) which are connected in series.

7. The nuclear heating thermal storage system of claim 1, further comprising:

and the control component is respectively connected with the nuclear heating system and the heat storage container so as to control the nuclear heating system and the heat storage container.

8. The nuclear heating thermal storage system of claim 1 wherein the thermal storage container is a pool, a tank, or a lake.

9. An urban heating network, comprising: the nuclear heating thermal storage system of any one of claims 1-8.