A novel thermal storage circulating water tank heat exchange system

Abstract

This invention provides a novel heat exchange system for a thermal storage circulating water tank, which ensures that the temperature of the water flowing out of the tank remains stable at the set requirements, guaranteeing the operating temperature of subsequent pipelines; and its cyclical use ensures economic efficiency. It includes: a steam heating system; a water tank comprising a water supply chamber and a temperature regulating chamber separated by a baffle; parallel-connected user water pipes; and a heating return water pipe; the steam heating pipes of the steam heating system are connected to the interiors of the water supply chamber and the temperature regulating chamber respectively via a first valve assembly; a main water supply pipe is provided at the bottom of one side of the water supply chamber, and a drain pipe is provided at the top of one side of the water supply chamber in the height direction; the height of the baffle is lower than that of the drain pipe, and the baffle ensures that the water flowing from the top of the temperature regulating chamber overflows into the water supply chamber along the baffle; the medium water flowing out of the main water supply pipe sequentially passes through a first heat exchanger and a second heat exchanger for heat exchange, and then flows into the inlet of the user water pipe in parallel through the water supply pipe.

Description

Technical Field

[0001] This invention relates to the technical field of water tank heat exchange systems, specifically a novel heat storage circulating water tank heat exchange system. Background Technology

[0002] Existing water tank heat exchange systems, as disclosed in CN207751054U "A Dedicated Hot Water Circulation System", use a single-chamber water tank. In actual use, the water in the single-chamber tank is heated or cooled to a corresponding temperature as needed, and then the water is output to the corresponding pipeline. However, due to the single-chamber design, the water temperature in the tank varies significantly, leading to situations where the water temperature in the subsequent pipelines does not meet the usage requirements. Therefore, there is an urgent need to develop a circulating water tank heat exchange system that can ensure the temperature of the water flowing out of the tank consistently meets the set requirements. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a novel heat exchange system for a thermal storage circulating water tank, which ensures that the temperature of the water flowing out of the tank reaches the set requirements, thus guaranteeing the operating temperature requirements of subsequent pipelines; and its cyclical use ensures economic efficiency.

[0004] A novel thermal storage circulating water tank heat exchange system, characterized in that it comprises:

[0005] Steam heating system;

[0006] A water tank, which includes a water supply chamber and a temperature regulating chamber separated by baffles;

[0007] User water pipes connected in parallel;

[0008] And heating return water pipelines;

[0009] The steam heating pipe of the steam heating system is connected to the interior of the water supply chamber and the temperature regulating chamber through the first valve assembly. A main water supply pipe is provided at the bottom of one side of the water supply chamber, and a drain pipe is provided at the top of one side of the water supply chamber in the height direction. The height of the baffle is lower than that of the drain pipe. The baffle ensures that the water flow at the top of the temperature regulating chamber overflows into the water supply chamber along the baffle.

[0010] The medium water flowing out of the main water supply pipe passes through the first heat exchanger and the second heat exchanger in sequence, and then flows into the inlet of the user water pipe in parallel through the water supply pipe. The outlets of all user water pipes are connected in parallel to the heating return water pipe.

[0011] The heating return water pipeline flows into the temperature regulating chamber after exchanging heat with the medium water in the first heat exchanger.

[0012] Its further features are:

[0013] The steam heating system includes a main steam heating pipe and a supplementary steam heating pipe. The main steam heating pipe is connected to the interior of the water supply chamber and the temperature control chamber through a first valve assembly and then through a pipeline. The supplementary steam heating pipe is connected to the second heat exchanger through a second valve assembly and then through a pipeline. After exchanging heat with the medium water, it flows out through the condensate drain pipe of the second heat exchanger.

[0014] The heating return water pipeline includes a main heating return water pipeline and a secondary heating return water pipeline. The corresponding inlets of the main heating return water pipeline are connected in parallel to the outlets of several sets of user water pipelines. The outlet of the main heating return water pipeline is connected to a third valve assembly and then connected to the corresponding heat exchange inlet of the first heat exchanger through a pipeline. The corresponding heat exchange outlet of the first heat exchanger is connected to the inlet of the secondary heating return water pipeline. The outlet of the secondary heating return water pipeline is connected in parallel to several water distributor inlets. The water distributors are evenly distributed at the bottom plate of the temperature regulating chamber to ensure the uniform distribution of the medium water return water.

[0015] The portion of the steam heating main pipe connected to the temperature control chamber includes several sets of water-absorbing silent water outlets, and the portion of the steam heating main pipe connected to the water supply chamber includes at least one set of water-absorbing silent water outlets.

[0016] The working principle of the water-absorbing silent water outlet is that steam travels along the pipe cavity, and the outer ring of the pipe cavity is provided with a water inlet. When the steam travels, it forms a negative pressure through the water inlet to absorb water. Then the water and steam are mixed and discharged.

[0017] The water-absorbing silent water outlets are installed on the same horizontal plane, wherein the water-absorbing silent water outlet corresponding to the temperature regulating chamber is built into the bottom of the temperature regulating chamber and is located above the water distributor, and the water-absorbing silent water outlet corresponding to the water supply chamber is built into the bottom of the water supply chamber.

[0018] The first valve assembly includes a first manual valve, a first electric valve, and a first manual regulating valve;

[0019] The second valve assembly includes a second manual valve, a second electric valve, and a second manual regulating valve;

[0020] The third valve assembly consists of a return water gate valve, a return water variable frequency pump, a return water check valve, and a return water shut-off valve arranged sequentially along the water flow direction.

[0021] Each water-suction silent water outlet includes a connecting sleeve, which is a hollow tubular shape. A steam inlet pipe and a water spray pipe are respectively sealed and installed at both ends of the connecting sleeve, and a nozzle is installed at the outlet end of the steam inlet pipe.

[0022] An expansion pipe is installed at the inlet end of the water spray pipe. The expansion pipe is a hollow tube with a gradually increasing inner diameter. The small diameter end of the expansion pipe faces the nozzle, and the large diameter end is connected to the inlet end of the water spray pipe.

[0023] The nozzle's outlet is arranged facing the inlet of the expansion tube and is spaced apart. The outer periphery of the connecting sleeve corresponding to the spacing has several water inlet holes.

[0024] Several temperature sensors are arranged around the bottom of the water tank, and at least one temperature sensor is arranged on the top of the water tank. The temperature sensor on the top of the water tank is located inside the water supply chamber and is positioned horizontally below the drain pipe.

[0025] A temperature sensor is arranged between the first heat exchanger and the second heat exchanger, and a temperature sensor is arranged at the inlet end of the water supply pipe.

[0026] With this invention, steam enters the temperature-regulating chamber and regulates the temperature of the medium water. After reaching the set temperature, it enters the outlet chamber. Since the medium water experiences a temperature drop as it flows into the outlet chamber, the steam heats the medium water in the outlet chamber to the set outlet temperature. The medium water then flows sequentially through the first heat exchanger and the second heat exchanger, and after temperature rise, it flows into the water supply pipeline, then into the user water pipeline. Afterward, all user water pipeline outlets return to the heating return water pipeline. The return water in the heating return water pipeline exchanges heat with the medium water in the first heat exchanger and then flows into the temperature-regulating chamber. This ensures that the temperature of the water flowing out of the water tank is stable and meets the set requirements, ensuring the operating temperature requirements of subsequent pipelines. Furthermore, its recycling ensures economic efficiency. Attached Figure Description

[0027] Figure 1 This is a top view of a specific embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the water tank arrangement according to a specific embodiment of the present invention;

[0029] Figure 3 This is an enlarged schematic diagram of the water-absorbing silent water outlet of the present invention;

[0030] The names corresponding to the serial numbers in the diagram are as follows:

[0031] 1. Water tank; 2. Water supply chamber; 3. Temperature regulating chamber; 4. Baffle; 5. Main water supply pipe; 6. Water supply gate valve; 7. Water supply variable frequency pump; 8. Water supply check valve; 9. Water supply shut-off valve; 10. First heat exchanger; 11. Second heat exchanger; 12. Steam supplementary heating pipe; 13. Second manual valve; 14. Second electric valve; 15. Second manual regulating valve; 16. Second standby valve; 17. Water supply pipeline; 18. User water pipeline; 19. Main heating return water pipeline; 20. Return water gate valve; 21. Return water variable frequency pump. 22. Return water check valve; 23. Return water shut-off valve; 24. Condensate drain pipe; 25. Drain pipe; 26. Secondary heating return water pipeline; 27. Water distributor; 28. Conical stainless steel block; 29. ​​Steam heating main pipe; 30. First manual valve; 31. First electric valve; 32. First manual regulating valve; 33. First standby valve; 34. Suction-type silent water outlet; 35. Steam inlet pipe; 36. Connecting sleeve; 37. Nozzle; 38. Expanding pipe; 39. Spray pipe; 40. Temperature sensor. Detailed Implementation

[0032] A novel thermal storage circulating water tank heat exchange system, see Figures 1-3 It includes a steam heating system, a water tank 1, parallel-connected user water pipes 18, and a heating return water pipe;

[0033] The water tank 1 includes a water supply chamber 2 and a temperature regulating chamber 3 separated by a baffle 4; the steam heating main pipe 29 of the steam heating system is connected to the interior of the water supply chamber 2 and the temperature regulating chamber 3 respectively through the first valve assembly. A main water supply pipe 5 is provided at the bottom of one side of the water supply chamber 2, and a drain pipe 25 is provided at the top of one side of the water supply chamber 2 in the height direction. The height of the baffle 4 is lower than that of the drain pipe 25. The baffle 4 ensures that the water flow at the top of the temperature regulating chamber 3 overflows into the water supply chamber 2 along the baffle 25.

[0034] The medium water flowing out of the main water supply pipe 5 passes through the first heat exchanger 10 and the second heat exchanger 11 in sequence, and then flows into the inlet of the user water pipe 18 in parallel through the water supply pipe 17. The outlets of all user water pipes 18 are connected in parallel to the heating return water pipe.

[0035] The heating return water pipeline flows into the temperature regulating chamber 3 after exchanging heat with the medium water in the first heat exchanger 10.

[0036] For specific implementation examples, see Figures 1-3 Baffle 4 is a stainless steel baffle, the first heat exchanger 10 is a water-to-water heat exchanger, and the second heat exchanger 11 is a steam-to-water heat exchanger.

[0037] The steam heating system includes a steam heating main pipe 29 and a steam supplementary heating pipe 12. The steam heating main pipe 29 is connected to the water supply chamber 2 and the temperature regulating chamber 3 through a first valve assembly and then through a pipeline. The steam supplementary heating pipe 12 is connected to the second heat exchanger 11 through a second valve assembly and then through a pipeline. After exchanging heat with the medium water, it flows out through the condensate drain pipe 24 of the second heat exchanger 11.

[0038] The heating return water pipeline includes a main heating return water pipeline 19 and a secondary heating return water pipeline 26. The corresponding inlets of the main heating return water pipeline 19 are connected in parallel to the outlets of several sets of user water pipelines 18. The outlet of the main heating return water pipeline 19 is connected to the third valve assembly and then connected to the corresponding heat exchange inlet of the first heat exchanger 10 through a pipeline. The corresponding heat exchange outlet of the first heat exchanger 10 is connected to the inlet of the secondary heating return water pipeline 26. The outlet of the secondary heating return water pipeline 26 is connected in parallel to the inlets of four water distributors. The four water distributors are evenly distributed at the center of the four areas divided into four regions on the bottom plate of the temperature regulating chamber 3 to ensure the uniform distribution of the medium water return water. In specific implementation, a conical stainless steel block 28 is set at the bottom of the water inlet of the water distributor 27. The conical stainless steel block 28 can automatically adjust its state according to the water flow speed to ensure that the water in the water distributor flows out horizontally and slowly, thereby reducing the rate of water temperature drop in the upper part of the water tank and ensuring that the water supply temperature meets the user's heating needs.

[0039] The secondary heating return water pipeline 26 is connected to four water distributors 27 via a branch line that splits into two and a secondary diversion branch line, ensuring uniform and reliable water flow in the pipeline.

[0040] The portion of the steam heating main pipe 29 connected to the temperature regulating chamber 3 includes three sets of silent water-absorbing outlets 34, and the portion of the steam heating main pipe 29 connected to the water supply chamber consists of one set of silent water-absorbing outlets 34. All silent water-absorbing outlets 34 are installed on the same horizontal plane. The three silent water-absorbing outlets 34 corresponding to the temperature regulating chamber 3 are built into the bottom of the temperature regulating chamber 3 and positioned above the water distributor. The silent water-absorbing outlets 34 corresponding to the water supply chamber 2 are built into the bottom of the water supply chamber 2. In specific implementation, each silent water-absorbing outlet 34 includes... The system includes a connecting sleeve 36, which is a hollow tube. A steam inlet pipe 35 and a water spray pipe 39 are respectively sealed and installed at both ends of the connecting sleeve 36. A nozzle 37 is installed at the outlet end of the steam inlet pipe 35, and an expansion pipe 38 is installed at the inlet end of the water spray pipe 39. The expansion pipe 38 is a hollow tube with a gradually increasing inner diameter. The small diameter end of the expansion pipe 38 faces the nozzle 37, and the large diameter end is connected to the inlet end of the water spray pipe 39. The outlet of the nozzle 37 is arranged facing the inlet of the expansion pipe 38 with a gap. Several water inlet holes are arranged around the outer periphery of the connecting sleeve 36 corresponding to the gap.

[0041] In specific implementation, the first valve assembly includes a first manual valve 30, a first electric valve 31, and a first manual regulating valve 32; a branch pipe is connected in parallel to the main steam heating pipe before the first manual valve 30 and after the first manual regulating valve 32, and a first spare valve 33 is installed on the branch pipe to ensure that a spare pipeline is available in case of emergency.

[0042] In specific implementation, the second valve assembly includes a second manual valve 13, a second electric valve 14, and a second manual regulating valve 15; a branch pipe is connected in parallel to the steam supplementary heating pipe before the second manual valve 13 and after the second manual regulating valve 15, and a second spare valve 16 is installed on the branch pipe to ensure that a spare pipeline is available in case of emergency.

[0043] In specific implementation, the third valve assembly consists of a return water gate valve 20, a return water variable frequency pump 21, a return water check valve 22, and a return water shut-off valve 23 arranged sequentially along the water flow direction.

[0044] In specific implementation, eight temperature sensors 40 are arranged around the bottom area of ​​the water tank 1, and one temperature sensor 40 is arranged on the top of the water tank 1. The temperature sensor 40 on the top of the water tank 1 is located inside the water supply chamber 2 and is positioned horizontally below the drain pipe 25.

[0045] A temperature sensor 40 is arranged between the first heat exchanger 10 and the second heat exchanger 11, and a temperature sensor 40 is arranged at the inlet end of the water supply pipe 17.

[0046] In practice, the water tank 1, water distributor 27, and water-suction silent water outlet 34 are all made of stainless steel.

[0047] Its working principle is as follows: Water vapor enters the temperature-regulating chamber and regulates the temperature of the medium water. After reaching the set temperature, it enters the outlet chamber. Since the medium water experiences a temperature drop as it flows into the outlet chamber, the water vapor heats the medium water in the outlet chamber to the set outlet temperature. The medium water then flows sequentially through the first heat exchanger and the second heat exchanger, and after a temperature rise, flows into the water supply pipe. In the first heat exchanger, the medium water is heated by the residual heat of the return water. The second heat exchanger further heats the medium water by supplementary steam (whether supplementary steam is needed depends on comparing the measured temperature with the preset temperature). Finally, the water flows into the user's water pipe, and then all users use... The water pipe outlet flows back to the heating return water pipe. The return water in the heating return water pipe flows into the temperature regulating chamber after exchanging heat with the medium water in the first heat exchanger. Due to the reasonable arrangement of several water distributors, the return water is distributed evenly and reliably. With the proper placement of the suction-type silent water outlet and the reasonable control of the steam flow, the temperature of the water flowing out of the water tank is kept stable at the set requirement. In order to further ensure the stable and reliable temperature of the medium water flowing out of the water tank, at least one suction-type silent water outlet is also arranged in the outlet chamber, so as to reheat the medium water according to its temperature and ensure the operating temperature requirements of the subsequent pipelines; and its recycling ensures economy.

[0048] The first electric valve automatically starts and stops when the temperature sensor on the upper part of the water tank reaches a specific range during a specific time period. When the temperature sensor on the water supply pipeline reaches the set range, the second heat exchanger and the second electric valve automatically start and stop. Under normal circumstances, the second heat exchanger (steam-water heat exchanger) is closed, and the supplementary steam pipeline is also closed. The supplementary steam pipeline is only opened to heat the medium water when the supply water temperature is lower than the heating requirement. Once the water temperature reaches the required level, it is closed again. It adopts thermal energy storage and waste heat recovery technology to transform inferior waste heat into high-quality heat load resources, achieving high efficiency and energy saving, ensuring stable heating for users and winter heating, and recovering and utilizing steam condensate to reduce the rate of pipeline corrosion and scaling, thus extending the service life of the system equipment.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel heat exchange system for a thermal storage circulating water tank, characterized in that, It includes: Steam heating system; A water tank, which includes a water supply chamber and a temperature regulating chamber separated by baffles; User water pipes connected in parallel; And heating return water pipelines; The steam heating pipe of the steam heating system is connected to the interior of the water supply chamber and the temperature regulating chamber through the first valve assembly. A main water supply pipe is provided at the bottom of one side of the water supply chamber, and a drain pipe is provided at the top of one side of the water supply chamber in the height direction. The height of the baffle is lower than that of the drain pipe. The baffle ensures that the water flow at the top of the temperature regulating chamber overflows into the water supply chamber along the baffle. The medium water flowing out of the main water supply pipe passes through the first heat exchanger and the second heat exchanger in sequence, and then flows into the inlet of the user water pipe in parallel through the water supply pipe. The outlets of all user water pipes are connected in parallel to the heating return water pipe. The heating return water pipeline flows into the temperature regulating chamber after exchanging heat with the medium water in the first heat exchanger. The steam heating system includes a main steam heating pipe and a supplementary steam heating pipe. The main steam heating pipe is connected to the interior of the water supply chamber and the temperature control chamber through a first valve assembly and then through a pipeline. The supplementary steam heating pipe is connected to the second heat exchanger through a second valve assembly and then through a pipeline. After exchanging heat with the medium water, it flows out through the condensate drain pipe of the second heat exchanger. The heating return water pipeline includes a main heating return water pipeline and a secondary heating return water pipeline. The corresponding inlets of the main heating return water pipeline are connected in parallel to the outlets of several sets of user water pipelines. The outlet of the main heating return water pipeline is connected to a third valve assembly and then connected to the corresponding heat exchange inlet of the first heat exchanger through a pipeline. The corresponding heat exchange outlet of the first heat exchanger is connected to the inlet of the secondary heating return water pipeline. The outlet of the secondary heating return water pipeline is connected in parallel to several water distributor inlets. The water distributors are evenly distributed at the bottom plate of the temperature regulating chamber to ensure the uniform distribution of the medium water return water. The portion of the steam heating main pipe connected to the temperature control chamber includes several sets of water-absorbing silent water outlets, and the portion of the steam heating main pipe connected to the water supply chamber includes at least one set of water-absorbing silent water outlets. The water-absorbing silent water outlets are installed on the same horizontal plane, wherein the water-absorbing silent water outlet corresponding to the temperature regulating chamber is built into the bottom of the temperature regulating chamber and is located above the water distributor, and the water-absorbing silent water outlet corresponding to the water supply chamber is built into the bottom of the water supply chamber. Steam enters the temperature-regulating chamber and regulates the temperature of the medium water. After reaching the set temperature, it enters the outlet chamber. Since the medium water experiences a temperature drop as it flows into the outlet chamber, the steam heats the medium water there to the set outlet temperature. The medium water then flows sequentially through the first and second heat exchangers, undergoing a temperature rise before flowing into the supply pipe. In the first heat exchanger, the residual heat of the returning water is used to heat the medium water, and in the second heat exchanger, it is further heated by supplementary steam. The water then flows into the user's water pipes, and finally, all user water pipe outlets return to the heating return line. The return water in the heating return water pipeline flows into the temperature control chamber after exchanging heat with the medium water in the first heat exchanger. Due to the reasonable arrangement of several water distributors, the return water is distributed evenly and reliably. With the proper placement of the suction-type silent water outlet and the reasonable control of the steam flow, the temperature of the water flowing out of the water tank is stable and meets the set requirements. In order to further ensure the stable and reliable temperature of the medium water flowing out of the water tank, at least one suction-type silent water outlet is also arranged in the outlet chamber to reheat the medium water according to its temperature, ensuring the operating temperature requirements of the subsequent pipelines. Each water-suction silent water outlet includes a connecting sleeve, which is a hollow tube. A steam inlet pipe and a water spray pipe are respectively sealed and installed at both ends of the connecting sleeve, and a nozzle is installed at the outlet end of the steam inlet pipe.

2. The novel thermal storage circulating water tank heat exchange system as described in claim 1, characterized in that: The first valve assembly includes a first manual valve, a first electric valve, and a first manual regulating valve.

3. The novel thermal storage circulating water tank heat exchange system as described in claim 1, characterized in that: The second valve assembly includes a second manual valve, a second electric valve, and a second manual regulating valve.

4. The novel thermal storage circulating water tank heat exchange system as described in claim 1, characterized in that: The third valve assembly consists of a return water gate valve, a return water variable frequency pump, a return water check valve, and a return water shut-off valve arranged sequentially along the water flow direction.

5. The novel thermal storage circulating water tank heat exchange system as described in claim 1, characterized in that: Several temperature sensors are arranged around the bottom of the water tank, and at least one temperature sensor is arranged on the upper part of the water tank. The temperature sensor on the upper part of the water tank is located inside the water supply chamber and is horizontally positioned below the drain pipe. A temperature sensor is arranged between the first heat exchanger and the second heat exchanger, and a temperature sensor is arranged at the inlet end of the water supply pipe.

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