Series-parallel heat storage device and system

Abstract

The invention relates to a series-parallel heat storage device and system. The series-parallel heat storage device comprises a first heat exchange assembly, a first heat storage component, a first driver and a first bypass pipeline. The first end of the first bypass pipeline is connected with an outlet of the first driver, the second end of the first bypass pipeline is connected with an outlet of the first heat storage component, a first adjusting valve is arranged on the first bypass pipeline, and the first bypass pipeline can be partially connected or completely connected or disconnected through the first adjusting valve. According to the heat storage device, part of the heat exchange medium can be converged with the heat exchange medium passing through the first heat storage component after bypassing the first heat storage component without passing through the first heat storage component, so that the temperature of the heat exchange medium entering the first heat exchange component can be adjusted, and the temperature of the heat exchange medium is kept stable; therefore, stable heat supply is kept in the process of heat exchange with steam water, the temperature of the generated steam is kept stable, and normal heat supply or power generation can be guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of heat storage, and particularly to a heat storage device and system for supporting peak shaving of thermal power generation or new energy heat storage. Background Art

[0002] In recent years, wind power and photovoltaic power have developed rapidly, but at the same time, problems such as wind curtailment, light curtailment, and deep peak shaving of thermal power generating units have emerged. Solid heat storage technology is one of the effective means to solve the above power consumption problems.

[0003] Heat storage technology can achieve "thermal power decoupling". During the low electricity consumption period and high heating period, the excess electricity can be stored in the form of heat energy, and then released during the high electricity consumption period. In addition, heat storage technology can also improve the peak shaving ability of the unit. Since the efficiency of the unit decreases during low-load operation, the economic benefit will decline. Using heat storage technology, during the low electricity consumption period, the boiler load does not need to be reduced to an ultra-low load, and it can operate stably at a more economical load, storing the excess electricity in the form of heat energy and then releasing it during the high electricity consumption period.

[0004] However, during the long-term operation of the solid heat storage device, after continuous heat release, the stored heat and the temperature of the heat storage device will decrease. At this time, the heat storage device is difficult to adjust flexibly, resulting in unstable heat release. For example, when the device supplies steam externally, the temperature of the heated steam will be unstable, affecting the quality of the output steam, and thus affecting heat supply or power generation. Summary of the Invention

[0005] The purpose of the present disclosure is to provide a series-parallel heat storage device and system to solve the problems in the above related technologies.

[0006] To achieve the above purpose, one aspect of the present disclosure provides a series-parallel heat storage device, including a first heat exchange component, a first heat storage component, a first driver, and a first bypass pipeline;

[0007] The first heat exchange component has a first heat exchange inlet end, a second heat exchange inlet end, a first heat exchange outlet end, and a second heat exchange outlet end. The first heat exchange inlet end is communicated with the first heat exchange outlet end, the second heat exchange inlet end is communicated with the second heat exchange outlet end. The second heat exchange inlet end is used for communicating with a water source, and the second heat exchange outlet end is used for discharging a steam-water mixture;

[0008] The inlet of the first driver is connected to the first heat exchange outlet end, the outlet of the first driver is connected to the inlet of the first heat storage component, the outlet of the first heat storage component is connected to the first heat exchange inlet end, and the first driver is used for driving the heat exchange medium to flow;

[0009] The first end of the first bypass pipeline is connected to the outlet of the first driver, the second end of the first bypass pipeline is connected to the outlet of the first heat storage component, and a first regulating valve is arranged on the first bypass pipeline. The first regulating valve can partially conduct, fully conduct or cut off the first bypass pipeline.

[0010] Optionally, the first heat storage component includes a plurality of first heat storage devices, and the plurality of first heat storage devices are connected end to end in sequence to make the plurality of first heat storage devices connected in series; or,

[0011] The first heat storage component includes a connecting pipeline and a plurality of first heat storage device groups. The inlet ends of the plurality of first heat storage device groups are connected to each other, the outlet ends of the plurality of first heat storage device groups are connected to each other, a second switching valve is arranged at the inlet end of each first heat storage device group, a connecting pipeline is arranged between two adjacent first heat storage device groups, two ends of the connecting pipeline are respectively connected to the inlet end of one first heat storage device group and the outlet end of another first heat storage device group among two adjacent first heat storage device groups, a third switching valve is arranged on the connecting pipeline, and the cooperation of the second switching valve and the third switching valve enables the plurality of first heat storage device groups to switch between series connection and parallel connection.

[0012] Optionally, each first heat storage device group includes one first heat storage device; or,

[0013] Each first heat storage device group includes at least two first heat storage devices, and at least two first heat storage devices are connected end to end in sequence to form a series structure.

[0014] Optionally, the first heat storage component further includes a third bypass pipeline. A fourth switching valve is arranged at both the inlet end and the outlet end of each first heat storage device. Each first heat storage device is provided with the third bypass pipeline, and a fifth switching valve is arranged on the third bypass pipeline. One end of the two fourth switching valves on each first heat storage device far away from the corresponding first heat storage device is respectively connected to both ends of the corresponding third bypass pipeline. The cooperation of the fourth switching valve and the fifth switching valve is used to control that the heat exchange medium can selectively flow through the corresponding first heat storage device.

[0015] Optionally, the heat exchange medium is nitrogen, and the first driver is a circulating booster fan;

[0016] The heat storage device further includes a first nitrogen replenishing device and a first filtering device. The outlet of the first nitrogen replenishing device and the first heat exchange outlet end are both connected to the inlet of the first filtering device, and the outlet of the first filtering device is connected to the inlet of the first driver.

[0017] Optionally, the heat storage device further includes a sixth regulating valve. Two ends of the sixth regulating valve are respectively connected to the inlet of the first heat storage component and the outlet of the first driver. The cooperation of the first regulating valve and the sixth regulating valve can adjust the temperature of the heat exchange medium flowing into the first heat exchange inlet end.

[0018] Optionally, the first heat exchange assembly includes a preheating heat exchanger, an evaporation heat exchanger, and an evaporation separator;

[0019] The preheating heat exchanger has a first preheating inlet end, a second preheating inlet end, a first preheating outlet end, and a second preheating outlet end. The first preheating inlet end communicates with the first preheating outlet end, and the second preheating inlet end communicates with the second preheating outlet end;

[0020] The evaporation heat exchanger has a first evaporation inlet end, a second evaporation inlet end, a first evaporation outlet end, and a second evaporation outlet end. The first evaporation inlet end communicates with the first evaporation outlet end, and the second evaporation inlet end communicates with the second evaporation outlet end;

[0021] The first preheating inlet end is connected to the first evaporation outlet end, the first preheating outlet end is connected to the inlet of the first driver, the first evaporation inlet end is connected to the outlet of the first heat storage component, the second preheating inlet end is communicated with a water source, the second preheating outlet end is connected to the inlet of the evaporation separator, the liquid outlet end of the evaporation separator is connected to the second evaporation inlet end, and the second evaporation outlet end is connected to the inlet of the evaporation separator.

[0022] Optionally, the heat storage device further includes a superheat heat storage assembly;

[0023] The superheat heat storage assembly includes a second heat exchange assembly, a second heat storage component, and a second driver. The second heat exchange assembly includes a third heat exchange inlet end, a third heat exchange outlet end, a fourth heat exchange inlet end, and a fourth heat exchange outlet end. The third heat exchange inlet end communicates with the third heat exchange outlet end, and the fourth heat exchange inlet end and the fourth heat exchange outlet end communicate with each other;

[0024] The third heat exchange outlet end is connected to the inlet of the second driver, the outlet of the second driver is connected to the inlet of the second heat storage component, the outlet of the second heat storage component is connected to the third heat exchange inlet end, the fourth heat exchange inlet end is connected to the second heat exchange outlet end, and the fourth heat exchange outlet end is used for discharging steam.

[0025] Optionally, the superheat heat storage assembly further includes a second bypass pipeline;

[0026] The first end of the second bypass pipeline is connected to the outlet of the second driver, the second end of the second bypass pipeline is connected to the outlet of the second heat storage component, and a seventh regulating valve is arranged on the second bypass pipeline. The seventh regulating valve can partially conduct, fully conduct or cut off the second bypass pipeline.

[0027] The second aspect of the present disclosure also provides a series-parallel heat storage system, including the above-mentioned series-parallel heat storage device.

[0028] Through the provided first bypass pipeline and the first regulating valve, part of the heat exchange medium can bypass the first heat storage component and converge with the heat exchange medium passing through the first heat storage component. As the opening degree of the first regulating valve varies, the flow rate of this part of the heat exchange medium can be adjusted, thereby adjusting the temperature of the heat exchange medium entering the first heat exchange component to keep its temperature stable and the heat supply stable and continuous. Thus, a stable heat supply is maintained during the heat exchange with steam and water, the temperature of the generated steam is kept stable, ensuring that the quality of the generated steam reaches above 600°C, and normal heat supply or power generation can be guaranteed.

[0029] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. They are used together with the following specific implementation to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0031] Figure 1 is a schematic diagram of a series-parallel heat storage device according to an embodiment of the present disclosure;

[0032] Figure 2 is a schematic diagram of a series-parallel heat storage device according to another embodiment of the present disclosure.

[0033] DESCRIPTION OF THE REFERENCE NUMERALS

[0034] 1. First heat exchange component, 11. Preheating heat exchanger, 12. Evaporation heat exchanger, 13. Evaporation separator;

[0035] 2. First heat storage component, 21. First heat storage unit group, 22. First heat storage unit, 23. Connection pipeline, 24. Third bypass pipeline, 25. Second switching valve, 26. Third switching valve, 27. Fourth switching valve, 28. Fifth switching valve;

[0036] 3. First driver;

[0037] 4. First bypass pipeline, 41. First regulating valve;

[0038] 5. Sixth regulating valve;

[0039] 6. Superheat heat storage assembly, 61. Second heat exchange assembly, 62. Second heat storage component, 63. Second driver, 64. Second bypass pipeline, 65. Seventh regulating valve, 66. Eighth regulating valve;

[0040] 7. Heat exchange medium flow detector;

[0041] 8. Steam flowmeter;

[0042] 91. First nitrogen replenishing device, 92. First filtering device, 93. Second nitrogen replenishing device, 94. Second filtering device. Detailed implementation manners

[0043] The following will describe the detailed implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0044] In the present disclosure, unless otherwise stated, the orientation terms such as "upper, lower, left, right" are usually defined by the direction of the drawing surface of the accompanying drawings, and "inner, outer" refer to the inside and outside of the relevant components. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present disclosure, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged", "connected" 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 directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0046] As Figure 1 and Figure 2 shown, one aspect of the present disclosure provides a series-parallel heat storage device, including a first heat exchange assembly 1, a first heat storage component ②, a first driver 3, and a first bypass pipeline 4.

[0047] The first heat exchange assembly 1 has a first heat exchange inlet end, a second heat exchange inlet end, a first heat exchange outlet end, and a second heat exchange outlet end. The first heat exchange inlet end is communicated with the first heat exchange outlet end, and the second heat exchange inlet end is communicated with the second heat exchange outlet end. The second heat exchange inlet end is used to communicate with a water source, and the second heat exchange outlet end is used to discharge the steam-water mixture.

[0048] The inlet of the first driver 3 is connected to the first heat exchange outlet end, the outlet of the first driver 3 is connected to the inlet of the first heat storage component 2, the outlet of the first heat storage component 2 is connected to the first heat exchange inlet end, and the first driver 3 is used to drive the heat exchange medium to flow.

[0049] The first end of the first bypass pipeline 4 is connected to the outlet of the first driver 3, the second end of the first bypass pipeline 4 is connected to the outlet of the first heat storage component 2, and a first regulating valve 41 is arranged on the first bypass pipeline 4. The first regulating valve 41 can partially conduct, fully conduct or cut off the first bypass pipeline 4.

[0050] Among them, the first heat exchange assembly 1 is used to realize the heat exchange between water and the heat exchange medium, so that the water is heated into a steam-water mixture. It can be understood that water enters from the second heat exchange inlet end, and the heat exchange medium, under the action of the first driver 3, enters the first heat exchange assembly 1 from the first heat exchange inlet end. The two form a heat exchange. After the water is heated into steam, it is discharged from the second heat exchange outlet end, and the heat exchange medium after heat exchange is discharged from the first heat exchange outlet end.

[0051] Among them, the first driver 3 drives the heat exchange medium to flow. After the heat exchange medium flows through the first heat storage component 2, it can absorb heat in the first heat storage component 2 and is then used to heat the water. At the same time, the first driver 3 can drive the heat exchange medium to directly flow into the first bypass pipeline 4, flow directly through the first bypass pipeline 4 to the outlet of the first heat storage component 2 and converge with the heat exchange medium flowing through the first heat storage component 2, so that the unexchanged heat exchange medium can be mixed with the heat exchange medium after heat exchange, and the temperature of the heat exchange medium can be adjusted.

[0052] It can be understood that by partially conducting or fully conducting the first regulating valve 41, part of the heat exchange medium can directly bypass the first heat storage component 2 and converge with the heat exchange medium flowing through the first heat storage component 2 and then enter the first heat exchange assembly 1. It should be noted that when it is not necessary for part of the heat exchange medium to bypass the first heat storage component 2, the first regulating valve 41 can be cut off.

[0053] In the above technical solution, through the arranged first bypass pipeline 4 and the first regulating valve 41, part of the heat exchange medium can bypass the first heat storage component 2 without passing through the first heat storage component 2 and converge with the heat exchange medium passing through the first heat storage component 2. As the opening degree of the first regulating valve 41 is different, the flow rate of this part of the heat exchange medium can be adjusted, and then the temperature of the heat exchange medium entering the first heat exchange assembly 1 can be adjusted to keep its temperature stable and the heat supply stable and continuous. Thus, a stable heat supply is maintained during the heat exchange process with the steam-water, the temperature of the generated steam is kept stable, ensuring that the quality of the generated steam reaches above 600 °C, and normal heat supply or power generation can be guaranteed.

[0054] Such asFigure 1 As shown, optionally, in an embodiment of the present disclosure, the first heat storage component 2 includes a plurality of first heat storage devices 22, and the plurality of first heat storage devices 22 are connected end to end in sequence so that the plurality of first heat storage devices 22 are connected in series. By connecting the plurality of first heat storage devices 22 in series, it is possible to achieve a stepped absorption of heat by the heat exchange medium, which can improve the temperature stability of the heat exchange medium and at the same time improve the utilization rate of the first heat storage devices 22. It can be understood that after the heat exchange medium is transported to the first heat storage component 2 under the action of the first driver 3, it sequentially passes through the plurality of first heat storage devices 22 and then flows out of the first heat storage component 2. It should be noted that the heat storage rate of each first heat storage device 22 can be adjusted as needed to better achieve a stepped absorption of heat. Optionally, in some examples, the number of the first heat storage devices 22 is four or more.

[0055] Optionally, in an embodiment of the present disclosure, the first heat storage component 2 further includes a third bypass pipeline 24. A fourth on-off valve 27 is provided at both the inlet end and the outlet end of each first heat storage device 22. Each first heat storage device 22 is provided with a third bypass pipeline 24. A fifth on-off valve 28 is provided on the third bypass pipeline 24. One end of the two fourth on-off valves 27 on each first heat storage device 22 away from the corresponding first heat storage device 22 is respectively connected to both ends of the corresponding third bypass pipeline 24. The cooperation of the fourth on-off valve 27 and the fifth on-off valve 28 controls the heat exchange medium to selectively flow through the corresponding first heat storage device 22.

[0056] By providing the third bypass pipeline 24, one or more of the first heat storage devices 22 can be made inoperative. In other words, the heat exchange medium does not flow through this first heat storage device 22. It can exclude some first heat storage devices 22 when their stored heat is insufficient or they malfunction, avoiding the ineffective flow of the heat exchange medium. At the same time, it can improve the temperature stability of the heat exchange medium and the operating flexibility of the first heat storage devices 22.

[0057] It can be understood that when the stored heat of the first heat storage device 22 near the head end is insufficient, by closing the fourth on-off valves 27 at both ends of this first heat storage device 22 and opening the fifth on-off valve 28 on the corresponding third bypass pipeline 24, the heat exchange medium does not flow through this first heat storage device 22 but directly flows through the third bypass pipeline 24 to the next first heat storage device 22 for heat absorption, which can ensure the stable heat absorption of the heat exchange medium.

[0058] Such as Figure 2As shown, optionally, in another embodiment of the present disclosure, the first heat storage component 2 includes a connecting pipeline 23 and a plurality of first heat storage unit groups 21. The inlet ends of the plurality of first heat storage unit groups 21 are interconnected, and the outlet ends of the plurality of first heat storage unit groups 21 are interconnected. A second switching valve 25 is provided at the inlet end of each first heat storage unit group 21. A connecting pipeline 23 is provided between two adjacent first heat storage unit groups 21. The two ends of the connecting pipeline 23 are respectively connected to the inlet end of one first heat storage unit group and the outlet end of another first heat storage unit group among two adjacent first heat storage unit groups 21. A third switching valve 26 is provided on the connecting pipeline 23. The cooperation of the second switching valve 25 and the third switching valve 26 enables the plurality of first heat storage unit groups 21 to switch between series connection and parallel connection.

[0059] Among them, through the interconnection of the inlet ends and the interconnection of the outlet ends of the plurality of first heat storage unit groups 21, parallel connection of the plurality of first heat storage unit groups 21 can be achieved. After the inlet ends of the plurality of first heat storage unit groups 21 are interconnected, they are connected to the outlet of the first driver 3. After the outlet ends of the plurality of first heat storage unit groups 21 are interconnected, they are connected to the first heat exchange inlet end.

[0060] Through the provided connecting pipeline 23, series connection of the plurality of first heat storage unit groups 21 can be achieved, so that the plurality of first heat storage unit groups 21 can be connected in parallel or in series as needed, realizing free switching between series connection and parallel connection to meet different requirements. It should be noted that one end of the connecting pipeline 23 is connected between the inlet end of one first heat storage unit group among two adjacent first heat storage unit groups 21 and the corresponding second switching valve 25, so that the closing of the second switching valve 25 will not affect the series connection of the plurality of first heat storage unit groups 21.

[0061] It can be understood that when parallel connection of the plurality of first heat storage unit groups 21 is required, the third switching valve 26 is closed and the second switching valve 25 is kept open. At this time, the heat exchange medium flows into each first heat storage unit group 21 respectively. By opening or closing the second switching valve 25, it is possible to select whether to enable the corresponding first heat storage unit group 21, so that reasonable adjustment can be made according to the heating requirement and the difference in the stored heat of the plurality of first heat storage unit groups 21, improving the temperature stability of the heat exchange medium.

[0062] When series connection of the plurality of first heat storage unit groups 21 is required, the third switching valve 26 is opened, and the second switching valve 25 of the first heat storage unit group 21 at the head end is opened, so that the heat exchange medium flows through the plurality of first heat storage unit groups 21 in sequence to achieve stepped heat absorption.

[0063] Optionally, a check valve is provided at the outlet end of each first heat storage unit group 21 to prevent the heat exchange medium from flowing back into the first heat storage unit group 21.

[0064] Optionally, in an embodiment of the present disclosure, each first heat storage unit 21 includes one first heat storage device 22.

[0065] Optionally, in another embodiment of the present disclosure, each first heat storage unit 21 includes at least two first heat storage devices 22, and the at least two first heat storage devices 22 are connected end to end in sequence to form a series structure. By connecting the multiple first heat storage devices 22 of each first heat storage unit 21 in series, the heat exchange medium flowing through each first heat storage unit 21 can also achieve stepped heat absorption. In some examples, each first heat storage unit 21 includes two first heat storage devices 22, and the number of first heat storage units 21 is two.

[0066] Optionally, in an embodiment of the present disclosure, the heat storage material in the first heat storage device 22 is a solid material with high thermal conductivity and high heat storage capacity.

[0067] Optionally, in an embodiment of the present disclosure, the heat exchange medium is nitrogen, and the first driver 3 is a circulating booster fan. By providing the circulating booster fan, it is beneficial to drive the flow of nitrogen, ensure a certain flow rate of nitrogen, and overcome the system resistance.

[0068] The heat storage device further includes a first nitrogen replenishing device 91 and a first filtering device 92. The outlet of the first nitrogen replenishing device 91 and the first heat exchange outlet end are both connected to the inlet of the first filtering device 92, and the outlet of the first filtering device 92 is connected to the inlet of the first driver 3.

[0069] By providing the first nitrogen replenishing device 91, nitrogen can be replenished when needed to ensure the stability of nitrogen pressure. In some examples, the first nitrogen replenishing device 91 can be a nitrogen production device.

[0070] By providing the first filtering device 92, nitrogen can be filtered to ensure the safe operation of the circulating booster fan and, at the same time, ensure the internal cleanliness of the first heat storage component 2, the first heat exchange component 1, and the related pipelines. Optionally, the first filtering device 92 can be disassembled for cleaning.

[0071] Optionally, in an embodiment of the present disclosure, the heat storage device further includes a sixth regulating valve 5. Both ends of the sixth regulating valve 5 are respectively connected to the inlet of the first heat storage component 2 and the outlet of the first driver 3. The cooperation of the first regulating valve 41 and the sixth regulating valve 5 can regulate the temperature of the heat exchange medium flowing into the first heat exchange inlet end.

[0072] Among them, the sixth regulating valve 5 can control the flow rate of the heat exchange medium flowing into the first heat storage component 2, so as to better control the temperature of the heat exchange medium flowing into the first heat exchange inlet end as needed.

[0073] Optionally, in an embodiment of the present disclosure, the first heat exchange component 1 includes a preheating heat exchanger 11, an evaporation heat exchanger 12, and an evaporation separator 13.

[0074] The preheating heat exchanger 11 has a first preheating inlet end, a second preheating inlet end, a first preheating outlet end, and a second preheating outlet end. The first preheating inlet end is communicated with the first preheating outlet end, and the second preheating inlet end is communicated with the second preheating outlet end.

[0075] The evaporation heat exchanger 12 has a first evaporation inlet end, a second evaporation inlet end, a first evaporation outlet end, and a second evaporation outlet end. The first evaporation inlet end is communicated with the first evaporation outlet end, and the second evaporation inlet end is communicated with the second evaporation outlet end.

[0076] The first preheating inlet end is connected to the first evaporation outlet end, the first preheating outlet end is connected to the inlet of the first driver 3, the first evaporation inlet end is connected to the outlet of the first heat storage component 2, the second preheating inlet end is communicated with the water source, the second preheating outlet end is connected to the inlet of the evaporation separator 13, the liquid outlet end of the evaporation separator 13 is connected to the second evaporation inlet end, and the second evaporation outlet end is connected to the inlet of the evaporation separator 13.

[0077] Among them, the preheating heat exchanger 11 and the evaporation heat exchanger 12 form a series structure, so that the heat exchange medium after absorbing heat twice can be reused, the heat can be fully utilized, and heat waste can be avoided. By preheating the water through the preheating heat exchanger 11 first and then introducing it into the evaporation heat exchanger 12, the provided evaporation separator 13 can achieve vapor-liquid separation and avoid steam carrying moisture.

[0078] It can be understood that the water is first heated once through the preheating heat exchanger 11, then enters the evaporation separator 13, and vapor-liquid separation is carried out through the evaporation separator 13, so that the separated water re-enters the evaporation heat exchanger 12 for heating, and then enters the evaporation separator 13 again to achieve vapor-liquid separation.

[0079] Optionally, in an embodiment of the present disclosure, the heat storage device further includes a superheat heat storage component 6.

[0080] The superheat heat storage component 6 includes a second heat exchange component 61, a second heat storage component 62, and a second driver 63. The second heat exchange component 61 includes a third heat exchange inlet end, a third heat exchange outlet end, a fourth heat exchange inlet end, and a fourth heat exchange outlet end. The third heat exchange inlet end is communicated with the third heat exchange outlet end, and the fourth heat exchange inlet end and the fourth heat exchange outlet end are communicated.

[0081] The third heat exchange outlet end is connected to the inlet of the second driver 63, the outlet of the second driver 63 is connected to the inlet of the second heat storage component 62, the outlet of the second heat storage component 62 is connected to the third heat exchange inlet end, the fourth heat exchange inlet end is connected to the second heat exchange outlet end, and the fourth heat exchange outlet end is used for discharging steam.

[0082] Among them, the second heat exchange component 61 is used for reheating the steam, and the second driver 63 is used for driving the heat exchange medium in the superheat heat storage component 6 to flow, so as to transfer the heat of the second heat storage component 62 to the steam to form superheated steam.

[0083] It can be understood that the steam enters from the fourth heat exchange inlet end, and after the heat exchange medium passes through the second heat storage component 62, it enters from the third heat exchange inlet end. The heat exchange medium and the steam conduct heat exchange in the second heat exchange component 61, and the heat exchange medium after releasing heat is transported back to the second heat storage component 62 by the second driver 63.

[0084] The superheat heat storage component 6 can realize steam reheating and improve the steam temperature quality.

[0085] In some examples, the second heat exchange component 61 includes a superheat heat exchanger, and the reheating of the steam is realized through the superheat heat exchanger. The second heat storage component 62 may only include a second heat storage device, and the number of the second heat storage devices is one. Of course, the structure of the second heat storage component 62 may also be the same as that of the first heat storage component 2, and the heat storage material in the second heat storage device adopts a solid material with high thermal conductivity and high heat storage capacity.

[0086] In some examples, the heat exchange medium flowing in the superheat heat storage component 6 is also nitrogen, and the second driver 63 is also a circulating booster fan. The second nitrogen replenishing device 93 and the second filtering device 94 can also be provided.

[0087] Optionally, in an implementation manner of the present disclosure, the superheat heat storage component 6 further includes a second bypass pipeline 64.

[0088] The first end of the second bypass pipeline 64 is connected to the outlet of the second driver 63, the second end of the second bypass pipe is connected to the outlet of the second heat storage component 62, and a seventh regulating valve 65 is provided on the second bypass pipeline 64. The seventh regulating valve 65 can partially conduct, fully conduct or cut off the second bypass pipeline 64, so that the unexchanged heat exchange medium can be mixed with the heat exchanged heat exchange medium, and the temperature of the heat exchange medium can be adjusted.

[0089] Among them, the second bypass pipeline 64 has the same principle and function as the first bypass pipeline 4. The second driver 63 can drive part of the heat exchange medium to bypass the second heat storage component 62 through the second bypass pipeline 64, so as to adjust the temperature of the heat exchange medium entering the second heat exchange assembly 61, improve the stability of the temperature of the heat exchange medium, avoid excessive fluctuations, and further ensure the stability of the temperature of the heated steam.

[0090] In some examples, an eighth regulating valve 66 can also be provided at the inlet of the second heat storage component 62 to regulate the flow rate of the heat exchange medium flowing through the second heat storage component 62.

[0091] It should be noted that the above-mentioned various components can be connected through corresponding pipelines, which will not be described in detail here. At the same time, a heat exchange medium flow detector 7 and a steam flowmeter 8 can be provided on the corresponding pipelines to detect the flow rate of nitrogen and the flow rate of the discharged steam.In some examples, the water source is demineralized water.

[0092] The second aspect of the present disclosure also provides a series-parallel heat storage system, including the above-mentioned series-parallel heat storage device.

[0093] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0094] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0095] In addition, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A series-parallel energy storage device, characterized in that, It includes a first heat exchange component, a first heat storage component, a first driver, and a first bypass pipeline; The first heat exchange component has a first heat exchange inlet end, a second heat exchange inlet end, a first heat exchange outlet end, and a second heat exchange outlet end. The first heat exchange inlet end is communicated with the first heat exchange outlet end, and the second heat exchange inlet end is communicated with the second heat exchange outlet end. The second heat exchange inlet end is used to be communicated with a water source, and the second heat exchange outlet end is used to discharge a steam-water mixture; The inlet of the first driver is connected to the first heat exchange outlet end, the outlet of the first driver is connected to the inlet of the first heat storage component, and the outlet of the first heat storage component is connected to the first heat exchange inlet end. The first driver is used to drive the heat exchange medium to flow; The first end of the first bypass pipeline is connected to the outlet of the first driver, the second end of the first bypass pipeline is connected to the outlet of the first heat storage component, and a first regulating valve is arranged on the first bypass pipeline. The first regulating valve can partially conduct, fully conduct, or cut off the first bypass pipeline.

2. The series-parallel heat storage device according to claim 1, characterized in that The first heat storage component includes a plurality of first heat storage devices, and the plurality of first heat storage devices are connected end to end in sequence to make the plurality of first heat storage devices connected in series; or, The first heat storage component includes a connecting pipeline and a plurality of first heat storage device groups. The inlet ends of the plurality of first heat storage device groups are connected to each other, and the outlet ends of the plurality of first heat storage device groups are connected to each other. A second switching valve is arranged at the inlet end of each first heat storage device group, and the connecting pipeline is arranged between adjacent two first heat storage device groups. Two ends of the connecting pipeline are respectively connected to the inlet end of one first heat storage device group and the outlet end of the other first heat storage device group among adjacent two first heat storage device groups. A third switching valve is arranged on the connecting pipeline. The cooperation of the second switching valve and the third switching valve enables the plurality of first heat storage device groups to switch between series connection and parallel connection.

3. The series-parallel energy storage device according to claim 2, wherein Each first heat storage device group includes one first heat storage device; or, Each first heat storage device group includes at least two first heat storage devices, and the at least two first heat storage devices are connected end to end in sequence to form a series structure.

4. The series-parallel energy storage device according to claim 2, wherein The first heat storage component further includes a third bypass pipeline. A fourth switching valve is arranged at both the inlet end and the outlet end of each first heat storage device. Each first heat storage device is provided with the third bypass pipeline, and a fifth switching valve is arranged on the third bypass pipeline. One ends of the two fourth switching valves on each first heat storage device far away from the corresponding first heat storage device are respectively connected to both ends of the corresponding third bypass pipeline. The cooperation of the fourth switching valve and the fifth switching valve is used to control that the heat exchange medium can selectively flow through the corresponding first heat storage device.

5. The series-parallel heat storage device according to claim 1, wherein The heat exchange medium is nitrogen, and the first driver is a circulating booster fan; The heat storage device further includes a first nitrogen supplement device and a first filtering device. The outlet of the first nitrogen supplement device and the first heat exchange outlet end are both connected to the inlet of the first filtering device, and the outlet of the first filtering device is connected to the inlet of the first driver.

6. The series-parallel energy storage device according to claim 1, characterized in that, The heat storage device further includes a sixth regulating valve. Two ends of the sixth regulating valve are respectively connected to an inlet of the first heat storage component and an outlet of the first driver. The cooperation of the first regulating valve and the sixth regulating valve can adjust the temperature of the heat exchange medium flowing into the first heat exchange inlet end.

7. The series-parallel heat storage device according to claim 1, characterized in that, The first heat exchange assembly includes a preheating heat exchanger, an evaporation heat exchanger, and an evaporation separator; The preheating heat exchanger has a first preheating inlet end, a second preheating inlet end, a first preheating outlet end, and a second preheating outlet end. The first preheating inlet end communicates with the first preheating outlet end, and the second preheating inlet end communicates with the second preheating outlet end; The evaporation heat exchanger has a first evaporation inlet end, a second evaporation inlet end, a first evaporation outlet end, and a second evaporation outlet end. The first evaporation inlet end communicates with the first evaporation outlet end, and the second evaporation inlet end communicates with the second evaporation outlet end; The first preheating inlet end is connected to the first evaporation outlet end, the first preheating outlet end is connected to an inlet of the first driver, the first evaporation inlet end is connected to an outlet of the first heat storage component, the second preheating inlet end is connected to a water source, the second preheating outlet end is connected to an inlet of the evaporation separator, a liquid outlet end of the evaporation separator is connected to the second evaporation inlet end, and the second evaporation outlet end is connected to the inlet of the evaporation separator.

8. The series-parallel heat storage device according to any one of claims 1-7, characterized in that, The heat storage device further includes an overheat heat storage assembly; The overheat heat storage assembly includes a second heat exchange assembly, a second heat storage component, and a second driver. The second heat exchange assembly includes a third heat exchange inlet end, a third heat exchange outlet end, a fourth heat exchange inlet end, and a fourth heat exchange outlet end. The third heat exchange inlet end communicates with the third heat exchange outlet end, and the fourth heat exchange inlet end and the fourth heat exchange outlet end communicate with each other; The third heat exchange outlet end is connected to an inlet of the second driver, an outlet of the second driver is connected to an inlet of the second heat storage component, an outlet of the second heat storage component is connected to the third heat exchange inlet end, the fourth heat exchange inlet end is connected to the second heat exchange outlet end, and the fourth heat exchange outlet end is used for discharging steam.

9. The series-parallel energy storage device according to claim 8, characterized in that, The overheat heat storage assembly further includes a second bypass pipeline; A first end of the second bypass pipeline is connected to an outlet of the second driver, a second end of the second bypass pipeline is connected to an outlet of the second heat storage component, and a seventh regulating valve is arranged on the second bypass pipeline. The seventh regulating valve can partially conduct, fully conduct, or cut off the second bypass pipeline.

10. A series-parallel energy storage system, characterized in that, Comprising the series-parallel heat storage device according to any one of claims 1-9.

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