Nuclear energy steam supply system

Abstract

The utility model relates to a nuclear energy steam supply system. The nuclear energy steam supply system comprises a heat source, a first heat supply pipeline, a first heat exchange device, a main circulating pump and a water supply pipeline. The heat source, the first heat exchange device and the main circulating pump are sequentially connected through a first heat supply pipeline, and the main circulating pump is connected with the heat source, so that a coolant flowing out of the heat source passes through the first heat supply pipeline, enters the heat supply side of the first heat exchange device and then returns to the heat source through the main circulating pump; the first heat exchange device comprises a first heat exchange part, a second heat exchange part and a second heat supply pipeline, the first heat exchange part and the second heat exchange part are connected in series through the second heat supply pipeline, and the first heat exchange part and the second heat exchange part are connected with the first heat supply pipeline and the water supply pipeline respectively. The first heat exchange part and the second heat exchange part are connected in series, so that a coolant flowing out of a heat source passes through the first heat exchange part and then passes through the second heat exchange part, and the first heat exchange part and the second heat exchange part can provide high-temperature steam and low-temperature steam respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear energy, in particular to a nuclear energy steam supply system. Background Art

[0002] Heat exchangers, evaporators and boilers are the most common heat exchange equipment. For nuclear energy heating, a common scenario is to use a preheater, steam generator and superheater in series to produce a single steam product (specific pressure and temperature). However, due to different production processes of users, the temperature, pressure and flow rate of the required steam products are different, making the existing heating system less adaptable. Utility Model Content

[0003] Based on this, it is necessary to provide a nuclear energy steam supply system to address the technical problem that the existing heating system has low adaptability due to the different production processes of users, which require different temperatures, pressures and flow rates of steam products.

[0004] A nuclear energy steam supply system, comprising a heat source, a first heat supply pipeline, a first heat exchange device, a main circulation pump and a water supply pipeline; the heat source, the first heat exchange device and the main circulation pump are respectively connected in sequence through the first heat supply pipeline, and the main circulation pump is connected to the heat source, so that the coolant flowing out of the heat source passes through the first heat supply pipeline, enters the heat supply side of the first heat exchange device, and then returns to the heat source through the main circulation pump;

[0005] The first heat exchange device includes a first heat exchange element, a second heat exchange element and a second heat supply pipeline. The first heat exchange element and the second heat exchange element are connected in series through the second heat supply pipeline, and the first heat exchange element and the second heat exchange element are respectively connected to the first heat supply pipeline. The heated sides of the first heat exchange element and the second heat exchange element are respectively connected to the water supply pipeline. The first heat exchange element and the second heat exchange element are respectively used to convert the water to be heated flowing into the corresponding water supply pipeline into high-temperature steam and low-temperature steam.

[0006] In one embodiment, the first heat exchange element and the second heat exchange element are both steam generators.

[0007] In one embodiment, the water supply pipeline includes a first water pipe, a second water pipe and a third water pipe, the first water pipe is used to connect to a water source, the second water pipe and the third water pipe are both connected to the first water pipe, and are respectively connected to the first heat exchange element and the second heat exchange element; the first heat exchange device also includes a first pump, and the first pump is arranged on the second water pipe.

[0008] In one embodiment, the nuclear energy steam supply system also includes a first steam supply pipeline and a first power generation element, and the first power generation element is connected to the first heat exchange element through the first steam supply pipeline, so that the high-temperature steam flowing out through the first heat exchange element drives the first power generation element to generate electricity through the first steam supply pipeline.

[0009] In one embodiment, the nuclear energy steam supply system also includes a second steam supply pipeline, a third steam supply pipeline and a second power generation element. The second power generation element is connected to the second heat exchange element through the second steam supply pipeline, and is connected to the first power generation element through the third steam supply pipeline, so that the low-temperature steam flowing out through the second heat exchange element and the exhaust steam flowing out through the first power generation element drive the second power generation element to generate electricity.

[0010] In one embodiment, the nuclear energy steam supply system also includes a condenser and a fourth steam supply pipeline, the condenser is connected to the second power generation device through the fourth steam supply pipeline, and the condenser is connected to the water supply pipeline, so that the exhaust steam flowing out through the second power generation device releases heat through the condenser to preheat the water to be heated in the water supply pipeline.

[0011] In one embodiment, the nuclear energy steam supply system further includes a second pump, which is disposed in a region where the water supply pipeline is located between the condenser and the first heat exchange device.

[0012] In one embodiment, the number of the second heat exchange elements is two or more, and each of the second heat exchange elements is connected in series in sequence through a second heat supply pipeline.

[0013] In one embodiment, the nuclear energy steam supply system further includes a heating element and a fifth steam supply pipeline, the first heat exchange element is connected to the heating element through the fifth steam supply pipeline, and the heating element is used to heat the high-temperature steam flowing out through the first heat exchange element.

[0014] In one embodiment, the nuclear energy steam supply system further includes a sixth steam supply pipeline, the second heat exchange element is connected to the heating element via the sixth steam supply pipeline, and the heating element is used to heat the low-temperature steam flowing out through the second heat exchange element.

[0015] Beneficial effects:

[0016] The nuclear energy steam supply system provided by the embodiment of the utility model includes a heat source, a first heat supply pipeline, a first heat exchange device, a main circulation pump and a water supply pipeline; the heat source, the first heat exchange device and the main circulation pump are connected in sequence through the first heat supply pipeline respectively, and the main circulation pump is connected to the heat source so that the coolant flowing out of the heat source passes through the first heat supply pipeline, enters the heating side of the first heat exchange device, and then returns to the heat source through the main circulation pump; the first heat exchange device includes a first heat exchange element, a second heat exchange element and a second heat supply pipeline, the first heat exchange element and the second heat exchange element are connected in series through the second heat supply pipeline, and the first heat exchange element and the second heat exchange element are respectively connected to a first heat supply pipeline, and the heated sides of the first heat exchange element and the second heat exchange element are respectively connected to the water supply pipeline, and the first heat exchange element and the second heat exchange element are respectively used to convert the water to be heated flowing into the corresponding water supply pipeline into high-temperature steam and low-temperature steam. In the application, water to be heated is respectively introduced into the first heat exchanger and the second heat exchanger through a water supply pipeline. Since the first heat exchanger and the second heat exchanger are connected in series, the coolant flowing out from the heat source first passes through the first heat exchanger and then passes through the second heat exchanger, so that the first heat exchanger can provide high-temperature steam, and the second heat exchanger can use the coolant flowing out through the first heat exchanger to provide low-temperature steam, thereby providing steam of different temperatures to meet the requirements of different users, thereby improving the adaptability of the nuclear energy steam supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of the first system structure of a nuclear energy steam supply system provided in one embodiment of the utility model.

[0018] FIG. 2 is a schematic diagram of the second system structure of the nuclear energy steam supply system provided in one embodiment of the utility model.

[0019] Figure Number:

[0020] 100-heat source; 110-first heating pipeline; 120-main circulation pump; 200-first heat exchange device; 210-first heat exchange element; 220-second heat exchange element; 230-second heating pipeline; 300-water supply pipeline; 310-first water pipe; 320-second water pipe; 330-third water pipe; 340-fourth water pipe; 350-water source; 360-first pump; 410-first steam supply pipeline; 420-first power generation element; 430-second steam supply pipeline; 440-third steam supply pipeline; 450-second power generation element; 460-condenser; 470-fourth steam supply pipeline; 480-second pump; 510-heating element; 520-fifth steam supply pipeline; 530-sixth steam supply pipeline. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0027] Refer to FIG1 , which is a schematic diagram of the first system structure of a nuclear energy steam supply system provided by an embodiment of the present invention. The nuclear energy steam supply system provided by an embodiment of the present invention comprises a heat source 100, a first heat supply pipeline 110, a first heat exchange device 200, a main circulation pump 120 and a water supply pipeline 300; the heat source 100, the first heat exchange device 200 and the main circulation pump 120 are respectively connected in sequence through the first heat supply pipeline 110, and the main circulation pump 120 is connected to the heat source 100 so that the coolant flowing out of the heat source 100 passes through the first heat supply pipeline 110, enters the heating side of the first heat exchange device 200, and then returns to the heat source 100 through the main circulation pump 120; the first heat exchange device 200 is connected to the heat source 100, and the main circulation pump 120 is connected to the heat source 100. The device 200 includes a first heat exchanger 210, a second heat exchanger 220 and a second heat supply pipeline 230. The first heat exchanger 210 and the second heat exchanger 220 are connected in series through the second heat supply pipeline 230, and the first heat exchanger 210 and the second heat exchanger 220 are respectively connected to a first heat supply pipeline 110, and the heated sides of the first heat exchanger 210 and the second heat exchanger 220 are respectively connected to the water supply pipeline 300. The first heat exchanger 210 and the second heat exchanger 220 are respectively used to convert the heated water flowing into the corresponding water supply pipeline 300 into high-temperature steam and low-temperature steam.

[0028] Specifically, in the present application, the water to be heated is respectively introduced into the first heat exchanger 210 and the second heat exchanger 220 through the water supply pipeline 300. Since the first heat exchanger 210 and the second heat exchanger 220 are connected in series, the coolant flowing out from the heat source 100 first passes through the first heat exchanger 210 and then passes through the second heat exchanger 220, so that the first heat exchanger 210 can provide high-temperature steam, and the second heat exchanger 220 can use the coolant flowing out through the first heat exchanger 210 to provide low-temperature steam, so that steam of different temperatures can be provided to meet the requirements of different users, thereby improving the adaptability of the nuclear energy steam supply system.

[0029] Among them, the heat source 100 in this embodiment is a reactor. The present application connects the second heat exchanger 220 in series with the first heat exchanger 210, that is, without changing the reactor body, it can ensure that the reactor ultimately maintains full power operation, thereby improving energy utilization.

[0030] In one embodiment, the first heat exchange element 210 and the second heat exchange element 220 are steam generators, so that the first heat exchange element 210 can directly generate medium-pressure saturated steam from the heat provided by the reactor, and the second heat exchange element 220 can directly generate low-pressure saturated steam from the heat provided by the reactor.

[0031] Referring to Figure 1, in one embodiment, the water supply pipeline 300 includes a first water pipe 310, a second water pipe 320 and a third water pipe 330. The first water pipe 310 is used to connect to a water source 350, and the second water pipe 320 and the third water pipe 330 are both connected to the first water pipe 310 and are respectively connected to the first heat exchange element 210 and the second heat exchange element 220; the first heat exchange device 200 also includes a first pump 360, and the first pump 360 is arranged on the second water pipe 320.

[0032] Specifically, the second water pipe 320 is connected in parallel with the third water pipe 330 to respectively provide heated water to the first heat exchanger 210 and the second heat exchanger 220. The first pump 360 is disposed on the second water pipe 320, so as to provide pressure to increase the saturation temperature of the water to be heated on the corresponding circuit on the second water pipe 320, so that the first heat exchanger 210 can provide high-temperature and high-pressure steam for use by users.

[0033] Referring to FIG. 1 , in one embodiment, the nuclear energy steam supply system further includes a first steam supply pipeline 410 and a first power generation element 420. The first power generation element 420 is connected to the first heat exchange element 210 through the first steam supply pipeline 410, so that the high-temperature steam flowing out through the first heat exchange element 210 drives the first power generation element 420 to generate electricity through the first steam supply pipeline 410.

[0034] Specifically, part of the high-temperature steam provided by the first heat exchanger 210 can flow into the first power generation element 420 through the first steam supply pipeline 410 to generate power, wherein a part of the power generated by the first power generation element 420 can be transmitted to the power grid, and the other part is supplied to the first pump 360. When the steam user's gas consumption suddenly increases, the amount of steam applied to the first power generation element 420 can be reduced, and vice versa, so as to ensure that the reactor is always in a full power state. Preferably, the first power generation element 420 is a steam turbine.

[0035] Referring to FIG. 1 , in one embodiment, the nuclear energy steam supply system further includes a second steam supply pipeline 430, a third steam supply pipeline 440 and a second power generation element 450. The second power generation element 450 is connected to the second heat exchange element 220 via the second steam supply pipeline 430, and is connected to the first power generation element 420 via the third steam supply pipeline 440, so that the low-temperature steam flowing out through the second heat exchange element 220 and the exhaust steam flowing out through the first power generation element 420 drive the second power generation element 450 to generate electricity.

[0036] Specifically, part of the high-temperature steam provided by the second heat exchanger 220 can flow into the second power generation element 450 through the second steam supply pipeline 430 to generate power, so as to transmit the generated electricity to the power grid. Among them, the exhaust gas flowing out through the first power generation element 420 also has a certain amount of heat, which can flow into the second power generation element 450 through the third steam supply pipeline 440, so as to act on the second power generation element 450 together with the low-temperature steam flowing out through the second heat exchanger 220 to improve energy utilization. Among them, when the steam user's gas consumption suddenly increases, the amount of steam applied to the second power generation element 450 can be reduced, and vice versa, so as to ensure that the reactor is always in a full power state. Preferably, the second power generation element 450 is a steam turbine.

[0037] Referring to FIG. 1 , in one embodiment, the nuclear energy steam supply system further includes a condenser 460 and a fourth steam supply pipeline 470. The condenser 460 is connected to the second power generation element 450 through the fourth steam supply pipeline 470, and the condenser 460 is connected to the water supply pipeline 300, so that the exhaust steam flowing out through the second power generation element 450 releases heat through the condenser 460 to preheat the water to be heated in the water supply pipeline 300.

[0038] Specifically, the water supply pipeline 300 also includes a fourth water pipe 340, which is connected to the first water pipe 310. The condenser 460 is arranged between the fourth water pipe 340 and the first water pipe 310, and is connected to the fourth steam supply pipeline 470, so that the exhaust gas flowing out through the second power generation element 450 still has a certain amount of heat, and can flow into the condenser 460 through the fourth steam supply pipeline 470 to preheat the water to be heated input by the fourth water pipe 340, and flow into the second water pipe 320 and the third water pipe 330 through the first water pipe 310 respectively, thereby improving the efficiency of the first heat exchange element 210 and the second heat exchange element 220 in converting the corresponding water to be heated into steam.

[0039] Referring to FIG. 1 , in one embodiment, the nuclear energy steam supply system further includes a second pump 480 , and the second pump 480 is disposed in a region of the water supply pipeline 300 between the condenser 460 and the first heat exchange device 200 .

[0040] Specifically, the second pump 480 can provide power so that the water supply pipeline 300 supplies water to the first heat exchange element 210 and the second heat exchange element 220. Under the action of the second pump 480, the exhaust gas flowing out of the second power generation element 450 releases heat and converts into liquid water after acting on the condenser 460, and then flows into the first water pipe 310 to achieve recycling and reduce carbon emissions.

[0041] Referring to FIG. 1 , in one embodiment, the number of the second heat exchange elements 220 is two or more, and each second heat exchange element 220 is connected in series in sequence through a second heat supply pipeline 230 .

[0042] Specifically, the number of the second heat exchanger 220 can be one, and two steams of different temperatures are provided through the first heat exchanger 210 and the second heat exchanger 220. The number of the second heat exchanger 220 can also be two or more, and each second heat exchanger 220 is sequentially connected in series through a second heat supply pipeline 230, so that the first heat exchanger 210 and each second heat exchanger 220 respectively provide steam of different temperatures to meet more user requirements and improve the adaptability of the nuclear energy steam supply system. It should be noted that each second heat exchanger 220 is connected to a third water pipe 330.

[0043] Referring to Figures 1 and 2, Figure 2 is a schematic diagram of the second system structure of a nuclear energy steam supply system provided by an embodiment of the utility model. In one embodiment, the nuclear energy steam supply system further includes a heating element 510 and a fifth steam supply pipeline 520, the first heat exchange element 210 is connected to the heating element 510 through the fifth steam supply pipeline 520, and the heating element 510 is used to heat the high-temperature steam flowing out through the first heat exchange element 210.

[0044] Specifically, the high-temperature steam flowing out of the first heat exchange element 210 flows into the heating element 510 through the fifth steam supply pipeline 520, so that the heating element 510 can further heat the high-temperature steam and further increase the temperature of the high-temperature steam to meet higher temperature requirements. The heating element 510 may be a boiler.

[0045] 1 and 2 , in one embodiment, the nuclear energy steam supply system further includes a sixth steam supply pipeline 530 , and the second heat exchange element 220 is connected to the heating element 510 via the sixth steam supply pipeline 530 , and the heating element 510 is used to heat the low-temperature steam flowing out through the second heat exchange element 220 .

[0046] Specifically, the low-temperature steam flowing out through the second heat exchange element 220 flows into the heating element 510 through the sixth steam supply pipeline 530, so that the heating element 510 can increase the heat, further heat the low-temperature steam, and increase the temperature of the low-temperature steam to meet higher temperature requirements.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A nuclear energy steam supply system, characterized in that: The nuclear energy steam supply system comprises a heat source, a first heat supply pipeline, a first heat exchange device, a main circulation pump and a water supply pipeline; the heat source, the first heat exchange device and the main circulation pump are respectively connected in sequence through the first heat supply pipeline, and the main circulation pump is connected to the heat source so that the coolant flowing out of the heat source passes through the first heat supply pipeline, enters the heating side of the first heat exchange device, and then returns to the heat source through the main circulation pump; The first heat exchange device includes a first heat exchange element, a second heat exchange element and a second heat supply pipeline. The first heat exchange element and the second heat exchange element are connected in series through the second heat supply pipeline, and the first heat exchange element and the second heat exchange element are respectively connected to the first heat supply pipeline. The heated sides of the first heat exchange element and the second heat exchange element are respectively connected to the water supply pipeline. The first heat exchange element and the second heat exchange element are respectively used to convert the water to be heated flowing into the corresponding water supply pipeline into high-temperature steam and low-temperature steam.

2. The nuclear energy steam supply system according to claim 1, characterized in that: The first heat exchange element and the second heat exchange element are both steam generators.

3. The nuclear energy steam supply system according to claim 1, characterized in that: The water supply pipeline includes a first water pipe, a second water pipe and a third water pipe. The first water pipe is used to connect to a water source. The second water pipe and the third water pipe are both connected to the first water pipe and are respectively connected to the first heat exchange element and the second heat exchange element. The first heat exchange device also includes a first pump, which is arranged on the second water pipe.

4. The nuclear energy steam supply system according to claim 1, characterized in that: The nuclear energy steam supply system also includes a first steam supply pipeline and a first power generation element. The first power generation element is connected to the first heat exchange element through the first steam supply pipeline, so that the high-temperature steam flowing out through the first heat exchange element drives the first power generation element to generate electricity through the first steam supply pipeline.

5. The nuclear energy steam supply system according to claim 4, characterized in that: The nuclear energy steam supply system also includes a second steam supply pipeline, a third steam supply pipeline and a second power generation element. The second power generation element is connected to the second heat exchange element through the second steam supply pipeline, and is connected to the first power generation element through the third steam supply pipeline, so that the low-temperature steam flowing out through the second heat exchange element and the exhaust steam flowing out through the first power generation element drive the second power generation element to generate electricity.

6. The nuclear energy steam supply system according to claim 5, characterized in that: The nuclear energy steam supply system also includes a condenser and a fourth steam supply pipeline. The condenser is connected to the second power generation element through the fourth steam supply pipeline, and the condenser is connected to the water supply pipeline, so that the exhaust steam flowing out through the second power generation element releases heat through the condenser to preheat the water to be heated in the water supply pipeline.

7. The nuclear energy steam supply system according to claim 6, characterized in that: The nuclear energy steam supply system also includes a second pump, which is arranged in a region of the water supply pipeline between the condenser and the first heat exchange device.

8. The nuclear energy steam supply system according to any one of claims 1 to 7, characterized in that: The number of the second heat exchange elements is two or more, and each of the second heat exchange elements is connected in series in sequence through a second heat supply pipeline.

9. The nuclear energy steam supply system according to any one of claims 1 to 7, characterized in that: The nuclear energy steam supply system also includes a heating element and a fifth steam supply pipeline. The first heat exchange element is connected to the heating element through the fifth steam supply pipeline. The heating element is used to heat the high-temperature steam flowing out through the first heat exchange element.

10. The nuclear energy steam supply system according to claim 9, characterized in that: The nuclear energy steam supply system also includes a sixth steam supply pipeline, and the second heat exchange element is connected to the heating element through the sixth steam supply pipeline, and the heating element is used to heat the low-temperature steam flowing out through the second heat exchange element.

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