Energy storage system

Abstract

The invention discloses an energy storage system, and particularly relates to the technical field of energy storage systems, the energy storage system comprises a power tank, an electric heating rod is arranged in the power tank, a heating port is formed in the power tank, one end of the electric heating rod extends into the power tank from the heating port, a heat storage tank is arranged at the top of the power tank, and a plurality of ascending pipes are arranged between the heat storage tank and the power tank. The top ends and the bottom ends of the ascending pipes are communicated with the heat storage tank and the power tank respectively, a water inlet pipe is fixedly arranged on one side of the power tank, and the sum of the cross sectional areas of the ascending pipes is far larger than the cross sectional area of the water inlet pipe. The energy storage medium is electrically heated, coal is not used as fuel, safety and pollution are achieved, the heat storage tank and the power tank are connected through the multiple ascending pipes, the ascending speed of the energy storage medium in the heat storage tank is slow, the temperature gradient in the heat storage tank appears, cold water and hot water are layered, and therefore the heat release time is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to an energy storage system. Background Art

[0002] Heating is a hot topic for people in the north every winter. Traditional winter heating devices are generally coal-fired boilers. In recent years, due to the reduction in coal supply and the pollution caused by coal combustion, coal-fired boilers have gradually been replaced by electric boilers.

[0003] During operation, an electric boiler generally uses electricity as a heat source and water as an energy storage medium. Electricity is first used to heat water to a high temperature, and then the hot water is used to dissipate heat into the room, thereby achieving the purpose of heating. For example, a household heating electric boiler with a publication number of CN208237972U in the prior art.

[0004] However, the existing technology does not have an energy storage system, and the current energy storage systems all use conventional water tanks or water tanks for energy storage. In order to meet the use requirements, conventional energy storage water tanks have low storage capacity and large volume, and the temperature gradient in the tank is not obvious. High and low temperature water often mix. After the high and low temperature water mix, the temperature in the tank decreases, which not only shortens the heating time, but also leads to poor heating effect and increases operating costs. Summary of the invention

[0005] The purpose of the present invention is to provide an energy storage system, which connects a heat storage tank and a power tank through multiple riser pipes, so that the rising speed of the energy storage medium inside the heat storage tank is slow, the temperature gradient in the heat storage tank is apparent, and the cold and hot water are stratified, thereby extending the heat release time.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: an energy storage system, comprising a power tank, an electric heating rod is arranged inside the power tank, a heating port is arranged on the power tank, one end of the electric heating rod extends from the heating port into the power tank, a heat storage tank is arranged on the top of the power tank, a plurality of riser pipes are arranged between the heat storage tank and the power tank, and the top and bottom ends of the riser pipes are respectively communicated with the heat storage tank and the power tank; A water inlet pipe is fixedly provided on one side of the power tank, the sum of the cross-sectional areas of the riser is much larger than the cross-sectional area of ​​the water inlet pipe, a plurality of temperature measuring tubes are fixedly provided on the outer end of the heat storage tank, each temperature measuring tube has a different height, a temperature sensor is provided inside the temperature measuring tube, a sealing plate is provided at one end of the temperature measuring tube through bolts, and the temperature sensor is mounted on the sealing plate.

[0007] Furthermore, the heat storage tank and the power tank body are both composed of a four-layer structure, which are an anti-corrosion layer, a heat insulation layer, a thermal insulation layer and a protective layer from the inside to the outside. The anti-corrosion layer is made of enamel, the heat insulation layer is made of 1mm thick ZS-high temperature resistant heat insulation paint, the thermal insulation layer is made of 50mm thick polyurethane material, and the protective layer is made of stainless steel. A sewage pipe is fixedly provided on the side of the power tank away from the water inlet pipe.

[0008] Furthermore, a safety valve and a detection tube are fixedly provided on the top of the heat storage tank, an air pressure sensor is provided inside the detection tube, a top cover is provided on the top of the detection tube, the air pressure sensor is fixed on the top cover, a base is fixedly provided on the bottom of the power tank, a controller is fixedly provided on the top of the base, a networking module is fixedly provided on the front side of the heat storage tank, the controller is connected to a computer through the networking module, the temperature sensor and the air pressure sensor are both provided at the input end of the controller, and the electric heating rod is provided at the output end of the controller.

[0009] Furthermore, a reflux pipe with a valve is provided on one side of the heat storage tank, and both ends of the reflux pipe are fixedly connected to the power tank and the heat storage tank respectively. A water outlet pipe is fixedly provided on one side of the heat storage tank, and an expansion tank is fixedly provided on the water outlet pipe.

[0010] Furthermore, the heat storage tank is provided with support assemblies on both the front and rear sides, and the support assembly includes a lower support rod fixedly arranged on the top of the base, the top of the lower support rod is rotatably connected with a sleeve, and the outer end of the sleeve is fixedly provided with a hand wheel; An upper support rod is provided inside the sleeve, the outer end of the upper support rod is connected to the inner wall of the sleeve through a thread, an end plate is fixedly provided on the top end of the upper support rod, and the end plate is fixedly provided on the outer end of the heat storage tank.

[0011] Furthermore, a plurality of cleaning components are provided inside the power tank, and the cleaning components include an arc-shaped mounting plate arranged on the inner wall of the power tank, two fixing ropes are fixedly provided on the top of the arc-shaped mounting plate, the electric heating rod is located between the two fixing ropes, a plurality of bristles are fixedly provided on the outer end of the fixing rope, the outer end of the bristles are in contact with the outer end of the electric heating rod, and a buoyancy ball is fixedly provided on the top of the fixing rope.

[0012] Furthermore, a floating assembly is provided inside the heat storage tank, and the floating assembly includes a buoyancy plate, and a plurality of balls are fixedly provided at the outer end of the buoyancy plate, and the balls can prevent the outer end of the buoyancy plate from rubbing against the inner wall of the heat storage tank, and an upper extension hose is provided at the top of the buoyancy plate, and the top end of the upper extension hose extends to the rear side of the heat storage tank; The bottom end of the upper extension hose is connected to two lower extension hoses through a three-way pipe, and the bottom end of the lower extension hose extends to the bottom of the buoyancy board and is fixed with a metal pipe.

[0013] In the above technical solution, the technical effects and advantages provided by the present invention are: 1. The energy storage medium is heated electrically, coal is not used as fuel, and it is safe and pollution-free. The heat storage tank and the power tank are connected by multiple risers, so that the energy storage medium rises slowly inside the heat storage tank. The temperature gradient inside the heat storage tank is apparent, and the cold and hot water are stratified, thereby extending the heat release time. In addition, during the energy storage process, the internal pressure of the heat storage tank increases, and more heat is stored. The increase in energy storage efficiency also reduces the system's footprint; 2. During the energy storage process, due to the increase in energy storage efficiency and the slow rise of the energy storage medium inside the heat storage tank, heating can be carried out during valley electricity hours and heating can be stopped during peak electricity hours, thus reducing the electricity cost during heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is the overall structure diagram of the present invention; Figure 2 This is a diagram showing the internal structure of the power tank of the present invention; Figure 3 It is a cross-sectional view of the heat storage tank of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of part A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of middle part B; Figure 6 It is a structural diagram of the floating assembly of the present invention; Figure 7 It is a structural diagram of the cleaning component of the present invention; Figure 8 It is a structural diagram of the support assembly of the present invention; Fig. 9 is a system diagram of the present invention; Fig.10 It is a cross-sectional view of the heat storage tank of the present invention.

[0016] Description of reference numerals: 1. Heat storage tank; 2. Power tank; 3. Base; 4. Controller; 5. Support assembly; 501. Lower support rod; 502. Sleeve; 503. Upper support rod; 504. End plate; 505. Hand wheel; 6. Expansion tank; 7. Safety valve; 8. Water outlet pipe; 9. Return pipe; 10. Temperature measuring tube; 11. Floating assembly; 1101. Buoyancy plate; 1102. Ball; 1103. Lower extension hose; 1104. Upper extension hose; 1105. Metal pipe; 12. Rising pipe; 13. Temperature sensor; 14. Detection tube; 15. Air pressure sensor; 16. Networking module; 17. Water inlet pipe; 18. Cleaning component; 1801. Arc-shaped mounting plate; 1802. Fixing rope; 1803. Brush; 1804. Buoyancy ball; 19. Electric heating rod; 20. Anti-corrosion layer; 21. Heat insulation layer; 22. Thermal insulation layer; 23. Protective layer. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] The present invention provides Figure 1-10 An energy storage system shown includes a power tank 2, an electric heating rod 19 is provided inside the power tank 2, a heating port is provided on the power tank 2, one end of the electric heating rod 19 extends from the heating port into the power tank 2, a heat storage tank 1 is provided on the top of the power tank 2, a plurality of riser pipes 12 are provided between the heat storage tank 1 and the power tank 2, and the top and bottom ends of the riser pipes 12 are respectively connected to the heat storage tank 1 and the power tank 2; A water inlet pipe 17 is fixedly provided on one side of the power tank 2, and the sum of the cross-sectional areas of the riser 12 is much larger than the cross-sectional area of ​​the water inlet pipe 17. A plurality of temperature measuring tubes 10 are fixedly provided on the outer end of the heat storage tank 1, and each temperature measuring tube 10 has a different height. A temperature sensor 13 is provided inside the temperature measuring tube 10, and a sealing plate is provided at one end of the temperature measuring tube 10 through bolts, and the temperature sensor 13 is installed on the sealing plate.

[0019] The energy storage medium is input into the power tank 2 through the water inlet pipe 17. The energy storage medium is usually water. Therefore, water is used as an example of the energy storage medium below. After the water is input into the power tank 2, the cold water is heated into hot water through the electric heating rod 19. The heated water flows upward into the heat storage tank 1 through each riser 12. The heat storage tank 1 stores the hot water and the heat it contains. The sum of the cross-sectional areas of each riser 12 is much larger than the cross-sectional area of ​​the water inlet pipe 17, and even dozens of times the cross-sectional area of ​​the water inlet pipe 17. The riser 12 prolongs the flow path of low-temperature water, greatly reduces the flow rate of water, and makes the water basically have no impact force, so the low-temperature water rises slowly, and the temperature gradient in the heat storage tank 1 appears, so the cold and hot water are layered, thereby prolonging the time of heat release; At the same time, a plurality of temperature measuring tubes 10 are arranged at the outer end of the heat storage tank 1, and each temperature measuring tube 10 is distributed up and down. When water enters the heat storage tank 1, the temperature sensor 13 inside each temperature measuring tube 10 can detect the water temperature at different depths of the water. Generally speaking, the closer the water is to the liquid surface, the lower the water temperature is. Therefore, when the temperature sensor 13 at the highest point detects that the water temperature is lower than 50°C, the electric heating rod 19 can be turned on and reheated. In this way, water is heated during valley electricity, that is, when the electricity price is low, and its heat is stored in the heat storage tank 1, and heating is stopped when the peak electricity price is high, thereby reducing the electricity cost during heating.

[0020] In order to improve the insulation effect of energy storage medium, such as Fig.10 As shown, the tank bodies of the heat storage tank 1 and the power tank 2 are both composed of a four-layer structure, which are an anti-corrosion layer 20, a heat insulation layer 21, a thermal insulation layer 22 and a protective layer 23 from the inside to the outside. The anti-corrosion layer 20 is made of enamel, the heat insulation layer 21 is made of 1 mm thick ZS-1 high temperature resistant heat insulation paint, the thermal insulation layer 22 is made of 50 mm thick polyurethane material, and the protective layer 23 is made of stainless steel. A sewage pipe is fixedly provided on the side of the power tank 2 away from the water inlet pipe 17.

[0021] By providing the anti-corrosion layer 20, the service life of the heat storage tank 1 and the power tank 2 can be extended, ensuring that they will not be damaged by corrosion within 15 years. At the same time, the anti-corrosion layer 20 and the heat insulation layer 21 are provided on the outside of the anti-corrosion layer 20, which greatly reduces the heat transfer efficiency and prevents heat loss during the energy storage process. The outermost protective layer 23 improves the strength of the heat storage tank 1 and the power tank 2, thereby firmly locking the heat.

[0022] During the energy storage process, the pressure inside the heat storage tank 1 needs to be controlled and should not be too large. Figure 1-5 As shown, a safety valve 7 and a detection tube 14 are fixedly provided on the top of the heat storage tank 1, an air pressure sensor 15 is provided inside the detection tube 14, a top cover is provided on the top of the detection tube 14, and the air pressure sensor 15 is fixedly provided on the top cover. A base 3 is fixedly provided on the bottom end of the power tank 2, a controller 4 is fixedly provided on the top of the base 3, a networking module 16 is fixedly provided on the front side of the heat storage tank 1, and the controller 4 is connected to a computer through the networking module 16. The temperature sensor 13 and the air pressure sensor 15 are both provided at the input end of the controller 4, and the electric heating rod 19 is provided at the output end of the controller 4.

[0023] A reflux pipe 9 with a valve is provided on one side of the heat storage tank 1, and both ends of the reflux pipe 9 are fixedly connected to the power tank 2 and the heat storage tank 1 respectively. The low-temperature water on the surface can flow back to the power tank 2 through the reflux pipe 9. A water outlet pipe 8 is fixedly provided on one side of the heat storage tank 1, and an expansion tank 6 is fixedly provided on the water outlet pipe 8.

[0024] During the energy storage process, the heated water will inevitably evaporate partially, which will cause the pressure inside the system to increase. The pressure needs to be controlled within 0.45MPa. Therefore, the pressure inside the heat storage tank 1 is monitored in real time through the air pressure sensor 15, and the volume of the water vapor after evaporation is balanced by the expansion tank 6. When the pressure exceeds 0.6MPa, the safety valve 7 will automatically release the pressure to avoid excessive pressure. At the same time, the air pressure sensor 15 will also sense the pressure change and remotely alarm the computer through the controller 4 and the networking module 16, so that relevant personnel can pay close attention to it.

[0025] During use, it is necessary to avoid damage to the riser 12. Figure 1 , 8 As shown, the heat storage tank 1 is provided with support assemblies 5 on both the front and rear sides, and the support assembly 5 includes a lower support rod 501 fixedly arranged at the top of the base 3, and a sleeve 502 is rotatably connected to the top of the lower support rod 501, and a hand wheel 505 is fixedly arranged at the outer end of the sleeve 502; An upper support rod 503 is provided inside the sleeve 502 , and the outer end of the upper support rod 503 is connected to the inner wall of the sleeve 502 by threads. An end plate 504 is fixedly provided on the top of the upper support rod 503 , and the end plate 504 is fixedly provided on the outer end of the heat storage tank 1 .

[0026] The heat storage tank 1 is supported by two support assemblies 5 on the front and rear sides of the heat storage tank 1. During use, the sleeve 502 is driven to rotate by turning the hand wheel 505, and the sleeve 502 is connected to the upper support rod 503 by threads. As the hand wheel 505 rotates, a thrust is generated to push the upper support rod 503 upward. The tighter the sleeve 502 is turned, the greater the thrust is. In this way, the heat storage tank 1 is supported by the support assembly 5. After the heat storage tank 1 is filled with water, the weight of the heat storage tank 1 can be prevented from being applied downward to the riser 12, causing the riser 12 to be bent.

[0027] It is necessary to clean the scale on the surface of the electric heating rod 19 in time. Figure 2 , 7 As shown, a plurality of cleaning components 18 are provided inside the power tank 2, and the cleaning components 18 include an arc-shaped mounting plate 1801 arranged on the inner wall of the power tank 2, and two fixing ropes 1802 are fixedly provided on the top of the arc-shaped mounting plate 1801, and the electric heating rod 19 is located between the two fixing ropes 1802, and a plurality of bristles 1803 are fixedly provided on the outer end of the fixing rope 1802, and the outer end of the bristles 1803 is in contact with the outer end of the electric heating rod 19, and a buoyancy ball 1804 is fixedly provided on the top of the fixing rope 1802.

[0028] The water entering the power tank 2 flows upward after being heated, and the density of the buoyancy ball 1804 is less than the density of water. Therefore, the fixing rope 1802 is straightened upward under the action of buoyancy, and the buoyancy ball 1804 will swing with the flow of water. The swing of the buoyancy ball 1804 drives the fixing rope 1802, and then the bristles 1803 rub the surface of the electric heating rod 19, thereby continuously cleaning the outer surface of the electric heating rod 19 during use, avoiding scale from adhering to the outer end of the electric heating rod 19, and also avoiding scale from hindering the spread of heat, thereby improving the heating efficiency of the electric heating rod 19.

[0029] It is possible to directly extract hot water from deep layers, such as Figure 3 , 6 As shown, a floating assembly 11 is provided inside the heat storage tank 1, and the floating assembly 11 includes a buoyancy plate 1101, and a plurality of balls 1102 are fixedly provided at the outer end of the buoyancy plate 1101, and the balls 1102 can prevent the outer end of the buoyancy plate 1101 from rubbing against the inner wall of the heat storage tank 1, and an upper extension hose 1104 is provided on the top of the buoyancy plate 1101, and the top end of the upper extension hose 1104 extends to the rear side of the heat storage tank 1; The bottom end of the upper extension hose 1104 is connected to two lower extension hoses 1103 via a three-way pipe. The bottom end of the lower extension hose 1103 extends to the bottom of the buoyancy board 1101 and is fixed with a metal tube 1105 .

[0030] During operation, the water inside the power tank 2 enters the heat storage tank 1. As the amount of water inside the heat storage tank 1 increases, the liquid level gradually rises, and the buoyancy plate 1101 floats on the water surface and moves up synchronously with the liquid level. During the upward movement, in order to prevent the outer end of the buoyancy plate 1101 from rubbing against the inner wall, a ball 1102 is fixed to the outer end of the buoyancy plate 1101. The ball 1102 contacts the inner wall of the heat storage tank 1 during the upward movement and rolls as a result, thereby preventing the buoyancy plate 1101 from rubbing against the inner wall of the heat storage tank 1 and hindering the floating assembly 11 from moving up. The lower extension hose 1103 located below the buoyancy plate 1101 is pulled downward into the depth below the water surface by the weight of the metal pipe 1105. When the water temperature on the surface of the water is low, the water with higher temperature in the deep layer can be directly pumped out through the upper extension hose 1104 and the lower extension hose 1103, without the need to discharge the surface water before heating, which is more efficient.

[0031] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An energy storage system, comprising a power tank (2), wherein an electric heating rod (19) is provided inside the power tank (2), characterized in that: A heat storage tank (1) is provided on the top of the power tank (2), and a plurality of riser pipes (12) are provided between the heat storage tank (1) and the power tank (2); A water inlet pipe (17) is fixedly provided on one side of the power tank (2), and a plurality of temperature measuring tubes (10) are fixedly provided on the outer end of the heat storage tank (1), each temperature measuring tube (10) having a different height, and a temperature sensor (13) is provided inside the temperature measuring tube (10).

2. An energy storage system according to claim 1, characterized in that: The tank bodies of the heat storage tank (1) and the power tank (2) are both composed of a four-layer structure, wherein the four-layer structure comprises, from the inside to the outside, an anti-corrosion layer (20), a heat insulation layer (21), a thermal insulation layer (22), and a protective layer (23).

3. An energy storage system according to claim 1, characterized in that: A safety valve (7) and a detection tube (14) are fixedly provided at the top of the heat storage tank (1), a pressure sensor (15) is provided inside the detection tube (14), a base (3) is fixedly provided at the bottom of the power tank (2), a controller (4) is fixedly provided at the top of the base (3), a networking module (16) is fixedly provided at the front side of the heat storage tank (1), and the controller (4) is connected to a computer via the networking module (16).

4. An energy storage system according to claim 1, characterized in that: A return pipe (9) with a valve is provided on one side of the heat storage tank (1), and two ends of the return pipe (9) are respectively fixedly connected to the power tank (2) and the heat storage tank (1). A water outlet pipe (8) is fixedly provided on one side of the heat storage tank (1), and an expansion tank (6) is fixedly provided on the water outlet pipe (8).

5. An energy storage system according to claim 3, characterized in that: The heat storage tank (1) is provided with a support assembly (5) on both the front and rear sides, the support assembly (5) comprising a lower support rod (501) fixedly arranged on the top of the base (3), the top of the lower support rod (501) being rotatably connected to a sleeve (502), and a hand wheel (505) being fixedly arranged on the outer end of the sleeve (502); An upper support rod (503) is provided inside the sleeve (502), an end plate (504) is fixedly provided on the top end of the upper support rod (503), and the end plate (504) is fixedly provided on the outer end of the heat storage tank (1).

6. An energy storage system according to claim 1, characterized in that: A plurality of cleaning components (18) are provided inside the power tank (2), the cleaning components (18) comprising an arc-shaped mounting plate (1801) provided on the inner wall of the power tank (2), two fixing ropes (1802) being fixedly provided at the top end of the arc-shaped mounting plate (1801), the electric heating rod (19) being located between the two fixing ropes (1802), a plurality of bristles (1803) being fixedly provided at the outer end of the fixing rope (1802), and a buoyancy ball (1804) being fixedly provided at the top end of the fixing rope (1802).

7. An energy storage system according to claim 1, characterized in that: A floating assembly (11) is provided inside the heat storage tank (1), the floating assembly (11) comprising a buoyancy plate (1101), a plurality of balls (1102) being fixedly provided at the outer end of the buoyancy plate (1101), an upper extension hose (1104) being provided at the top of the buoyancy plate (1101), the top end of the upper extension hose (1104) extending to the rear side of the heat storage tank (1); The bottom end of the upper extension hose (1104) is connected to two lower extension hoses (1103) via a tee pipe, and the bottom end of the lower extension hose (1103) extends to the bottom of the buoyancy board (1101) and is fixedly provided with a metal tube (1105).

Images