A fluctuating steam thermal storage and heat exchange device and method

Abstract

A fluctuating steam thermal storage and heat exchange device and method are disclosed. The device includes a tank, a heat exchanger, and a spraying device. The spraying device is located in the upper part of the tank, and the heat exchanger is located in the lower part of the tank. The bottom of the tank is connected to the spraying device via an upper pipe section through an upper circulation inlet, and to the middle of the tank via a lower pipe section through a lower circulation inlet. A circulating water pump is installed on the lifting pipe. A steam inlet is provided on the tank between the spraying device and the lower circulation inlet. This invention also provides a thermal storage and heat exchange method based on this fluctuating steam thermal storage and heat exchange device. This invention can solve the problem of recovering and utilizing intermittent polluted steam, and produces clean, high-temperature secondary water that can be used for power generation or winter heating.

Description

Technical Field

[0001] This invention relates to a heat storage and heat exchange device, and more particularly to a fluctuating steam heat storage and heat exchange device and method. Background Technology

[0002] The steel industry generates a large amount of waste heat during production. Currently, medium- and high-grade waste heat has been almost completely utilized, while the utilization rate of low-temperature waste heat resources is low. For example, the large amount of discontinuous fluctuating steam generated during the pressurized hot quenching process of steel slag cannot be integrated into the plant's low-pressure steam network due to its low temperature and impurities. Furthermore, the intermittent nature and corrosiveness of this quenching steam make its recovery and utilization difficult, and currently it can only be discharged into the atmosphere. This not only pollutes the environment but also results in a significant waste of water and thermal energy resources. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a fluctuating steam heat storage and exchange device, which can solve the problem of recycling intermittent polluted steam and generate clean, high-temperature secondary water that can be used for power generation or winter heating.

[0004] This invention provides a fluctuating steam thermal storage and heat exchange device, including...

[0005] The tank body, heat exchanger, and spraying device are provided, with the spraying device located in the upper part of the tank body and the heat exchanger located in the lower part of the tank body.

[0006] The bottom of the tank is connected to the spraying device via an upper pipe section through an upper circulation inlet and to the middle of the tank via a lower pipe section through a lower circulation inlet. A circulating water pump is installed on the lifting pipe.

[0007] A steam inlet is provided on the tank body between the spray device and the lower circulation inlet.

[0008] Preferably, the lifting pipeline, the upper pipe section, and the lower pipe section are connected by a connecting valve.

[0009] Preferably, the tank includes a vent valve located at the top.

[0010] Preferably, a filter is installed on the section of the riser pipe between the inlet and the circulating water pump.

[0011] Preferably, the heat exchanger is a liquid heat exchanger, including a secondary water inlet at the bottom and a secondary water outlet at the top. The water discharged through the secondary water outlet can be connected to an ORC generator set for power generation or to a heating system for heating.

[0012] Preferably, a sewage discharge pipe is provided on the lifting pipeline, the inlet end of which is connected to the lower section of the lifting pipeline through a sewage discharge valve, and the outlet end is a sewage discharge port.

[0013] Preferably, the lifting pipeline is configured as one, two or more, evenly distributed around the outer periphery of the tank; the bottom of the tank is connected to the spray device via the upper pipe section through the upper circulation inlet and to the middle of the tank via the lower pipe section through the lower circulation inlet, and a circulating water pump is installed on the lifting pipeline.

[0014] Preferably, the tank and its external circulation pipeline are insulated; the heat exchanger includes corrosion-resistant and scale-inhibiting non-metallic heat exchange tubes.

[0015] The present invention also provides a method for fluctuating steam thermal storage and heat exchange, based on the above-mentioned fluctuating steam thermal storage and heat exchange device, comprising the following steps:

[0016] 1) The tank is pre-filled with liquid, steam is injected through the steam inlet, and the spray device is turned on. The water sprayed from the spray device comes into contact with the steam and forms droplets that fall into the tank.

[0017] 2) Turn on the heat exchanger so that the secondary water enters the heat exchanger through the secondary water inlet for heat exchange and is discharged through the secondary water outlet;

[0018] 3) When the steam flow rate increases, start the circulation pump of at least one riser pipeline and the corresponding upper pipe section, so that the liquid in the tank enters the spray device through the upper circulation inlet of the riser pipeline; when the steam flow rate continues to increase, start the circulation pump of at least two riser pipelines and the corresponding upper pipe sections, so that the liquid in the tank enters the spray device through the corresponding riser pipeline and each upper circulation inlet.

[0019] Alternatively, when the steam flow rate decreases, both the circulating pump and the upper section of the riser pipeline are shut down;

[0020] Alternatively, when the temperature difference in the tank increases, the circulation pump of at least one lifting pipeline and the corresponding upper pipe section are turned on, so that the liquid in the tank enters the spray device through the upper circulation inlet of the lifting pipeline; when the temperature difference continues to increase, the circulation pump of at least two lifting pipelines and the corresponding upper pipe sections are turned on, so that the liquid in the tank enters the spray device through the corresponding lifting pipeline and each upper circulation inlet.

[0021] 4) Adjust the vent valve to maintain the pressure inside the tank within a certain range; open it when the pressure is high and close it when the pressure is low.

[0022] Preferably, in the above method, the drain valve is opened to allow the dirt and / or liquid at the bottom of the tank to be discharged from the drain outlet via the drain pipe.

[0023] The present invention has the following technical effects:

[0024] This invention addresses the problem of intermittently fluctuating polluted steam emitted by steel enterprises or other industrial facilities. It recovers the heat from this steam and converts it into continuously output clean hot water, which can then be used to power an ORC generator set or for winter heating. This invention solves the problem of recovering and utilizing intermittent polluted steam, producing clean, high-temperature secondary water that can be used for power generation or winter heating. The upper circulation design enhances heat exchange between water and steam, increasing the device's heat storage efficiency. The lower circulation design enhances heat exchange among water at different levels within the tank, resulting in a more uniform water temperature. The dual-circulation design for hot water storage increases the device's heat storage and exchange efficiency, maintaining a high temperature for the produced secondary water. Multiple circulation pipelines allow for adjustable spray water flow and provide backup for each other. The use of corrosion-resistant and scale-inhibiting non-metallic heat exchangers not only produces clean secondary water but also avoids corrosion and scaling of the heat exchange equipment.

[0025] Specifically, this invention is applicable to the waste heat recovery of discontinuous stale steam, especially the waste heat recovery of hot quenching steam from steel slag. This invention provides a fluctuating steam heat storage and exchange device, comprising a tank, a heat exchanger, a spray device, a circulating water pump, a vent valve, a connecting valve, a drain valve, a filter, a steam inlet, a drain outlet, a secondary water inlet, a secondary water outlet, an upper circulation inlet, and a lower circulation inlet.

[0026] When the steam flow rate increases, the circulating pump starts and the upward passage of the connecting valve opens. When the steam flow rate continues to increase, the circulating pump starts and the upward passage of the connecting valve opens again. Similarly, when the steam flow rate decreases, the circulating pump and the upward passage of the connecting valve close sequentially. This design allows the spray water flow rate to be adjusted according to the steam flow rate, and the two sets of spray circulation pipelines can serve as backups for each other.

[0027] When the temperature difference in the tank increases, the circulation pump starts and the downward channel of the connecting valve opens. When the temperature difference continues to increase, the circulation pump starts and the downward channel of the connecting valve opens again. The upper circulation can enhance the heat exchange between steam and water, maximizing heat storage, while the lower circulation can keep the water temperature in the tank at a smaller difference, enhancing heat transfer.

[0028] The vent valve keeps the pressure inside the tank within a certain range, opening when the pressure is high and closing when the pressure is low, thus ensuring the safe operation of the tank.

[0029] The drain valve has a channel on the right side for draining the tank. This design not only allows for the periodic removal of dirt from the bottom of the tank, but also helps maintain a certain liquid level inside the tank. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the fluctuating steam heat storage and heat exchange device of the present invention;

[0031] Figure 2 This is a schematic diagram of an embodiment of the present invention.

[0032] Figure 3This is a schematic diagram of the heat exchanger of the present invention;

[0033] Figure 4 for Figure 3 Top view;

[0034] Figure 5 This is a schematic diagram of the heat exchanger tube sheet.

[0035] Number: 1-Tank body; 2-Heat exchanger; 211-Inlet end cap; 212-Inlet tube sheet; 221-Outlet end cap; 222-Outlet tube sheet; 231-Heat exchange tube; 232-Tube hole; 3-Spray device; 4-Circulating water pump; 5-Vent valve; 6-Connecting valve; 7-Drain valve; 8-Filter; 9-Steam inlet; 10-Drain outlet; 11-Secondary water inlet; 12-Secondary water outlet; 13-Upper circulation inlet; 14-Lower circulation inlet. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] See Figure 1-3 This invention provides a fluctuating steam thermal storage and heat exchange device, including...

[0038] Tank 1, heat exchanger 2, spray device 3, wherein the spray device 3 is located in the upper part of the tank 1 and the heat exchanger 2 is located in the lower part of the tank 1;

[0039] The bottom of the tank 1 is connected to the spraying device 3 via the upper pipe section through the upper circulation inlet 13 and the middle of the tank 1 via the lower pipe section through the lower circulation inlet 14 through the lifting pipe. A circulating water pump 4 is installed on the lifting pipe.

[0040] A steam inlet 9 is provided on the tank body 1 between the spray device 3 and the lower circulation inlet 14.

[0041] Furthermore, the lifting pipeline, the upper pipe section, and the lower pipe section are connected by a connecting valve 6.

[0042] Furthermore, the tank 1 includes a vent valve 5 installed on its top.

[0043] Furthermore, a filter 8 is installed on the pipe section between the inlet of the booster pipe and the circulating water pump 4.

[0044] Furthermore, the heat exchanger 2 is a liquid heat exchanger, including a secondary water inlet 11 at the bottom and a secondary water outlet 12 at the top.

[0045] Furthermore, a sewage pipe is installed on the lifting pipeline. The inlet end of the sewage pipe is connected to the lower section of the lifting pipeline through a sewage valve 7, and the outlet end is a sewage outlet 10.

[0046] Furthermore, the lifting pipeline is configured as one, two or more, evenly distributed around the outer periphery of the tank body 1; the bottom of the tank body 1 is connected to the spray device 3 via the upper pipe section through the upper circulation inlet 13 and to the middle of the tank body 1 via the lower pipe section through the lower circulation inlet 14 through the lifting pipeline, and a circulating water pump 4 is installed on the lifting pipeline.

[0047] Furthermore, the tank 1 and its external circulation pipeline are insulated; the heat exchanger 2 includes corrosion-resistant and scale-inhibiting non-metallic heat exchange tubes.

[0048] The present invention also provides a method for fluctuating steam thermal storage and heat exchange, based on the above-mentioned fluctuating steam thermal storage and heat exchange device, comprising the following steps:

[0049] 1) Liquid is pre-stored in tank 1, steam is injected into steam inlet 9, and spray device 3 is turned on. The water sprayed out by spray device 3 comes into contact with the steam and forms droplets that fall into tank 1.

[0050] 2) Turn on the heat exchanger 2 so that the secondary water enters the heat exchanger through the secondary water inlet 11 for heat exchange and is discharged through the secondary water outlet 12;

[0051] 3) When the steam flow rate increases, start the circulation pump 4 of at least one riser pipeline and the corresponding upper pipe section, so that the liquid in the tank 1 enters the spray device 3 through the upper circulation inlet 13 of the riser pipeline; when the steam flow rate continues to increase, start the circulation pump 4 of at least two riser pipelines and the corresponding upper pipe section, so that the liquid in the tank 1 enters the spray device 3 through the corresponding riser pipeline and each upper circulation inlet 13.

[0052] Alternatively, when the steam flow rate decreases, both the circulating pump 4 and the upper section of the riser pipeline are shut down;

[0053] Alternatively, when the temperature difference of tank 1 increases, the circulation pump 4 of at least one lifting pipeline and the corresponding upper pipe section are turned on, so that the liquid in tank 1 enters the spray device 3 through the upper circulation inlet 13 via the lifting pipeline; when the temperature difference continues to increase, the circulation pump 4 of at least two lifting pipelines and the corresponding upper pipe sections are turned on, so that the liquid in tank 1 enters the spray device 3 through the corresponding lifting pipeline and each upper circulation inlet 13.

[0054] 4) Adjust the vent valve 5 to maintain the pressure inside the tank within a certain range; open it when the pressure is high and close it when the pressure is low.

[0055] Furthermore, in the above method, the drain valve 7 is opened, allowing the dirt and / or liquid at the bottom of the tank 1 to be discharged from the drain port 10 via the drain pipe.

[0056] The liquid level of the pre-stored liquid in the tank 1 should be higher than that of the lower circulation inlet 14.

[0057] The circulating pump 4, filter 8, and vent valve 5 of this invention are all commercially available conventional products, and the connecting valve 6 and drain valve 7 are all conventional three-way valves.

[0058] The water discharged through the secondary water outlet 12 of this invention can be connected to an ORC generator set for power generation or to a heating system for heating.

[0059] Example 1

[0060] A fluctuating steam thermal storage and heat exchange device with a single booster pipeline, see [link to relevant documentation]. Figure 2 ,include

[0061] Tank 1, heat exchanger 2, spray device 3, the spray device 3 is located in the upper part of the tank 1, the heat exchanger 2 is located in the lower part of the tank 1; the bottom of the tank 1 is connected to the spray device 3 by the upper pipe section through the upper circulation inlet 13 and to the middle of the tank 1 by the lower pipe section through the lower circulation inlet 14 through the lifting pipe; a circulating water pump 4 is installed on the lifting pipe.

[0062] A steam inlet 9 is provided on the tank body 1 between the spray device 3 and the lower circulation inlet 14.

[0063] Furthermore, the lifting pipeline, the upper pipe section, and the lower pipe section are connected by a connecting valve 6.

[0064] Furthermore, the tank 1 includes a vent valve 5 installed on its top.

[0065] Furthermore, a filter 8 is installed on the pipe section between the inlet of the booster pipe and the circulating water pump 4.

[0066] Furthermore, the heat exchanger 2 is a liquid heat exchanger, including a secondary water inlet 11 at the bottom and a secondary water outlet 12 at the top.

[0067] Furthermore, a sewage pipe is installed on the lifting pipeline. The inlet end of the sewage pipe is connected to the lower section of the lifting pipeline through a sewage valve 7, and the outlet end is a sewage outlet 10.

[0068] The bottom of the tank 1 is connected to the spray device 3 via an upper pipe section through an upper circulation inlet 13 and to the middle of the tank 1 via a lower pipe section through a lower circulation inlet 14. A circulating water pump 4 is installed on the lifting pipe.

[0069] Furthermore, the tank 1 and its external circulation pipeline are insulated; the heat exchanger 2 is made of corrosion-resistant and scale-inhibiting non-metallic heat exchange tubes.

[0070] See Figure 3-5The heat exchanger 2 includes an inlet end cap 211, an inlet tube sheet 212, an outlet end cap 221, an outlet tube sheet 222, and heat exchange tubes 231. The inlet end cap 211 is provided at the outer end of the inlet tube sheet 212, and a secondary water inlet 11 is provided on the inlet end cap 211. The outlet end cap 221 is provided at the outer end of the outlet tube sheet 222, and a secondary water outlet 12 is provided on the outlet end cap 221. The two ends of the heat exchange tubes 231 are respectively fixed in the tube holes 232 of the inlet tube sheet 212 and the outlet tube sheet 222.

[0071] Each of the end caps and corresponding tube sheets is connected by a flange. The heat exchange tube 231 is interference-fitted with the tube hole 232.

[0072] Furthermore, the heat exchange tube 231 may be one, two, or more arranged in parallel. Furthermore, the heat exchange tube 231 may be a straight tube, or it may be further configured as a spiral tube to extend the heat exchange path, increase the heat exchange time, and improve heat exchange efficiency.

[0073] A heat storage and heat exchange method based on the fluctuating steam heat storage and heat exchange device according to Embodiment 1 includes the following steps:

[0074] 1) Liquid is pre-stored in tank 1, steam is injected into steam inlet 9, and spray device 3 is turned on. The water sprayed out by spray device 3 comes into contact with the steam and forms droplets that fall into tank 1.

[0075] 2) Turn on the heat exchanger 2 so that the secondary water enters the heat exchanger through the secondary water inlet 11 for heat exchange and is discharged through the secondary water outlet 12;

[0076] 3) When the steam flow rate increases, the circulation pump 4 of the lifting pipeline and the corresponding upper pipe section are turned on, so that the liquid in the tank 1 enters the spray device 3 through the upper circulation inlet 13 of the lifting pipeline.

[0077] Alternatively, when the steam flow rate decreases, both the circulating pump 4 and the upper section of the riser pipeline are shut down;

[0078] Alternatively, when the temperature difference of tank 1 increases, the circulation pump 4 of the lifting pipeline and the corresponding upper pipe section are turned on, so that the liquid in tank 1 enters the spray device 3 through the upper circulation inlet 13 via the lifting pipeline.

[0079] 4) Adjust the vent valve 5 to maintain the pressure inside the tank within a certain range; open it when the pressure is high and close it when the pressure is low.

[0080] Furthermore, in the above method, the drain valve 7 is opened, allowing the dirt and / or liquid at the bottom of the tank 1 to be discharged from the drain port 10 through the drain pipe. This can both clean the dirt deposited at the bottom of the tank 1 and maintain the liquid level at a certain level.

[0081] The liquid level of the pre-stored liquid in the tank 1 should be higher than that of the lower circulation inlet 14.

[0082] Example 2

[0083] A fluctuating steam thermal storage and heat exchange device with two riser pipelines, see [link to relevant documentation]. Figure 1 ,include

[0084] Tank 1, heat exchanger 2, spray device 3, wherein the spray device 3 is located in the upper part of the tank 1 and the heat exchanger 2 is located in the lower part of the tank 1;

[0085] The lifting pipeline is configured as two lines, evenly distributed around the outer perimeter of the tank body 1; the bottom of the tank body 1 is connected to the spray device 3 via the upper pipe section through the upper circulation inlet 13 and to the middle of the tank body 1 via the lower pipe section through the lower circulation inlet 14 through the lifting pipeline, and a circulating water pump 4 is installed on the lifting pipeline.

[0086] A steam inlet 9 is provided on the tank body 1 between the spray device 3 and the lower circulation inlet 14.

[0087] Furthermore, the lifting pipeline, the upper pipe section, and the lower pipe section are connected by a connecting valve 6.

[0088] Furthermore, the tank 1 includes a vent valve 5 installed on its top.

[0089] Furthermore, a filter 8 is installed on the pipe section between the inlet of the booster pipe and the circulating water pump 4.

[0090] Furthermore, the heat exchanger 2 is a liquid heat exchanger, including a secondary water inlet 11 at the bottom and a secondary water outlet 12 at the top.

[0091] Furthermore, one of the aforementioned booster lines (in Figure 1 A sewage pipe is installed on the right side of the tank (marked in the middle). The inlet end of the sewage pipe is connected to the lower section of the lifting pipeline through a sewage valve 7, and the outlet end is a sewage outlet 10.

[0092] Furthermore, the tank 1 and its external circulation pipeline are insulated; the heat exchanger 2 is made of corrosion-resistant and scale-inhibiting non-metallic heat exchange tubes.

[0093] A heat storage and heat exchange method based on the fluctuating steam heat storage and heat exchange device according to Embodiment 1 includes the following steps:

[0094] 1) Liquid is pre-stored in tank 1, steam is injected into steam inlet 9, and spray device 3 is turned on. The water sprayed out by spray device 3 comes into contact with the steam and forms droplets that fall into tank 1.

[0095] 2) Turn on the heat exchanger 2 so that the secondary water enters the heat exchanger through the secondary water inlet 11 for heat exchange and is discharged through the secondary water outlet 12;

[0096] 3) When the steam flow rate increases, turn on the circulation pump 4 and the corresponding upper pipe section of the right-side lifting pipeline, so that the liquid in the tank 1 enters the spray device 3 through the upper circulation inlet 13 via the lifting pipeline; when the steam flow rate continues to increase, turn on the circulation pump 4 and the corresponding upper pipe section of the left-side lifting pipeline, so that the liquid in the tank 1 enters the spray device 3 through the corresponding lifting pipeline and each upper circulation inlet 13.

[0097] Alternatively, when the steam flow rate decreases, both the circulating pump 4 and the upper section of the riser pipeline are shut down;

[0098] Alternatively, when the temperature difference of tank 1 increases, the circulation pump 4 of the right-side lifting pipeline and the corresponding upper pipe section are turned on, so that the liquid in tank 1 enters the spray device 3 through the upper circulation inlet 13 via the lifting pipeline; when the temperature difference continues to increase, the circulation pump 4 of the left-side lifting pipeline and the corresponding upper pipe section are turned on, so that the liquid in tank 1 enters the spray device 3 through the corresponding lifting pipeline and each upper circulation inlet 13.

[0099] 4) Adjust the vent valve 5 to maintain the pressure inside the tank within a certain range; open it when the pressure is high and close it when the pressure is low.

[0100] Furthermore, in the above method, the drain valve 7 is opened, allowing the dirt and / or liquid at the bottom of the tank 1 to be discharged from the drain port 10 via the drain pipe.

[0101] The liquid level of the pre-stored liquid in the tank 1 should be higher than that of the lower circulation inlet 14.

[0102] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Unless otherwise specified, an element defined by the phrase "comprising..." or "including..." does not exclude the presence of additional elements in the process, method, article, or terminal device that includes said element. Additionally, in this document, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number.

[0103] Although the above embodiments have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the above descriptions are merely embodiments of the present invention and do not limit the scope of patent protection of the present invention. Any equivalent structural or procedural transformations made using the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for fluctuating steam thermal storage and heat exchange, based on a fluctuating steam thermal storage and heat exchange device, characterized in that, The fluctuating steam thermal storage and heat exchange device includes, Tank (1), heat exchanger (2), spray device (3), the spray device (3) is located in the upper part of the tank (1), and the heat exchanger (2) is located in the lower part of the tank (1); the heat exchanger (2) is a liquid heat exchanger, including a secondary water inlet (11) at the bottom and a secondary water outlet (12) at the top. The bottom of the tank (1) is connected to the spray device (3) via the upper pipe section through the upper circulation inlet (13) and to the middle of the tank (1) via the lower pipe section through the lower circulation inlet (14) through the lifting pipe. A circulation pump (4) is installed on the lifting pipe. The lifting pipe is configured as at least one and distributed around the outer periphery of the tank (1). A steam inlet (9) is provided on the tank (1) between the spray device (3) and the lower circulation inlet (14). The method includes the following steps: 1) Liquid is pre-stored in the tank (1), steam is injected through the steam inlet (9), and the spray device (3) is turned on. The water sprayed out by the spray device (3) comes into contact with the steam and forms droplets that fall into the tank (1). 2) Turn on the heat exchanger (2) so that the secondary water enters the heat exchanger through the secondary water inlet (11) for heat exchange and is discharged through the secondary water outlet (12); 3) When the steam flow rate increases, turn on the circulation pump (4) of at least one riser pipe and the corresponding upper pipe section so that the liquid in the tank (1) enters the spray device (3) through the upper circulation inlet (13) of the riser pipe; when the steam flow rate continues to increase, turn on the circulation pump (4) of at least two riser pipes and the corresponding upper pipe section so that the liquid in the tank (1) enters the spray device (3) through the corresponding riser pipe and each upper circulation inlet (13). Alternatively, when the steam flow rate decreases, the circulating pump (4) and the upper section of the riser pipeline are both shut down; Alternatively, when the temperature difference of the tank (1) increases, the circulation pump (4) of at least one lifting pipeline and the corresponding upper pipe section are turned on, so that the liquid in the tank (1) enters the spray device (3) through the upper circulation inlet (13) of the lifting pipeline; when the temperature difference continues to increase, the circulation pump (4) of at least two lifting pipelines and the corresponding upper pipe section are turned on, so that the liquid in the tank (1) enters the spray device (3) through the corresponding lifting pipeline and each upper circulation inlet (13). 4) Adjust the vent valve (5) to keep the pressure inside the tank within a certain range. Open it when the pressure is high and close it when the pressure is low.

2. A method of wave motion steam storage and heat exchange according to claim 1, wherein The lifting pipeline, upper pipe section, and lower pipe section are connected by a connecting valve (6); a vent valve (5) is provided on the top of the tank (1).

3. The fluctuating steam thermal storage and heat exchange method according to claim 1, characterized in that, A filter (8) is installed on the pipe section between the inlet of the lift pipeline and the circulation pump (4).

4. The fluctuating steam thermal storage and heat exchange method according to claim 1, characterized in that, The water discharged from the secondary water outlet (12) is connected to the ORC generator set for power generation and / or heating.

5. The fluctuating steam thermal storage and heat exchange method according to claim 1, characterized in that, A sewage pipe is installed on the lifting pipeline. The inlet end of the sewage pipe is connected to the lower section of the lifting pipeline through a sewage valve (7), and the outlet end is a sewage outlet (10).

6. The fluctuating steam thermal storage and heat exchange method according to claim 1, characterized in that, The tank (1) and its external circulation pipeline are insulated; the heat exchanger (2) includes corrosion-resistant and scale-inhibiting non-metallic heat exchange tubes.

7. The fluctuating steam thermal storage and heat exchange method according to claim 5, characterized in that, Open the drain valve (7) to allow the dirt and / or liquid at the bottom of the tank (1) to be discharged from the drain port (10) through the drain pipe.

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