Sand particle heat storage and insulation tank
By using natural colored sand as the heat storage material and electric heating tubes in the heat storage tank for heat energy storage, combined with a multi-layer insulation structure, the problems of scale corrosion and leakage are solved, and safe and reliable heat energy storage is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU LICAI SAND PROD NEW MATERIAL CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-29
AI Technical Summary
The use of water as the heat storage material in existing heat storage tanks can easily lead to corrosion and leakage of the inner wall of the tank, posing a safety hazard.
Natural colored sand is used as the heat storage material to form an outer sand layer and an inner sand layer. The heat is stored and transferred through electric heating tubes and medium pipelines. The multi-layer insulation layer and mesh cylinder structure are combined to reduce friction and improve the insulation effect.
It reduces the risk of corrosion and leakage on the inner wall of the tank, improves thermal energy storage efficiency, and reduces the probability of safety accidents.
Smart Images
Figure CN224302854U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat storage tank technology, and in particular to a sand-based heat storage and insulation tank. Background Technology
[0002] A thermal storage tank is a device mainly composed of an insulated tank body and thermal storage material. The thermal storage material is filled in the insulated tank body, and thermal energy is stored by absorbing heat with the thermal storage material and keeping the insulated tank body warm.
[0003] Currently, water is commonly used as a heat storage material to store excess heat energy in the form of hot water in insulated tanks. However, storing hot water in insulated tanks for extended periods can cause scale buildup on the inner walls, leading to corrosion and potentially sudden leaks that could cause safety accidents. Utility Model Content
[0004] In order to reduce the safety accidents caused by tank leakage, this application provides a sand-based heat storage and insulation tank.
[0005] The sand-based heat storage and insulation tank provided in this application adopts the following technical solution:
[0006] A sand-based heat storage and insulation tank includes a tank body with a tank cover at the top. The tank body contains an outer sand layer and an inner sand layer, with the outer sand layer fitted over the inner sand layer. An electric heating element is disposed between the inner ring wall of the outer sand layer and the outer ring wall of the inner sand layer. A heat transfer medium inlet pipe and a cold transfer medium outlet pipe are disposed within the inner sand layer, and a heat transfer medium outlet pipe and a cold transfer medium inlet pipe are disposed within the outer sand layer. The top ends of the heat transfer medium inlet pipe, the heat transfer medium outlet pipe, the cold transfer medium inlet pipe, the cold transfer medium outlet pipe, and both ends of the electric heating element all penetrate the tank cover. The bottom ends of the heat transfer medium inlet pipe and the heat transfer medium outlet pipe are connected, and the bottom ends of the cold transfer medium inlet pipe and the cold transfer medium outlet pipe are also connected.
[0007] By adopting the above technical solution, since natural colored sand has excellent thermal conductivity and high heat storage capacity, it can replace water as a heat storage material to fill the tank, forming an outer sand layer and an inner sand layer. This reduces the corrosion caused by scale on the inner wall of the tank and lowers the risk of tank leakage leading to safety accidents. When the electric heating element is energized, the natural colored sand absorbs heat and stores the heat energy in the tank. When hot gas or hot liquid moves sequentially along the heat medium inlet and outlet pipes, the natural colored sand absorbs heat and stores the heat energy in the tank. When cold gas or cold liquid moves sequentially along the cold medium inlet and outlet pipes, the natural colored sand releases heat to heat the cold gas or cold liquid. Furthermore, in the event of an accidental leak in the heat medium inlet, outlet, or cold medium inlet or outlet pipes, the leaked liquid or gas enters the tank, making it less likely for tank leakage to cause a safety accident.
[0008] Preferably, a plurality of upper connecting seats are fixedly provided on the side wall of the can lid, and connecting holes are opened through the upper connecting seats. A plurality of lower connecting seats are fixedly provided on the outer wall of the can, and connecting grooves are opened on the lower connecting seats. Connecting bolts are provided in both the connecting holes and the connecting grooves. The connecting bolts pass through the connecting holes and are threadedly connected to the connecting grooves.
[0009] By adopting the above technical solution, the can lid and the can body can be detachably connected by connecting bolts.
[0010] Preferably, a first heat insulation layer is provided on the outer wall of the tank, and a first heat preservation layer is provided on the inner wall of the tank. The first heat preservation layer is sleeved on the outer sand layer and is in contact with the outer ring wall of the outer sand layer. A second heat insulation layer is provided on the top wall of the tank cover and a second heat preservation layer is provided on the bottom wall of the tank cover. The top ends of the heat medium inlet pipe, the top ends of the heat medium outlet pipe, the top ends of the cold medium inlet pipe, the top ends of the cold medium outlet pipe, and both ends of the electric heating tube all penetrate the second heat preservation layer and the second heat insulation layer.
[0011] By adopting the above technical solution, the first insulation layer, the first heat preservation layer, the second insulation layer, and the second heat preservation layer improve the heat preservation effect of the outer sand layer and the inner sand layer.
[0012] Preferably, the heat medium inlet pipe, heat medium outlet pipe, cold medium inlet pipe, and cold medium outlet pipe are all spirally arranged, and the electric heating tube is serpentinely arranged.
[0013] By adopting the above technical solutions, the heat exchange area between the electric heating tube, the heat medium outlet tube, the refrigerant inlet tube and the outer sand layer is increased, as is the heat exchange area between the electric heating tube, the heat medium inlet tube, the refrigerant outlet tube and the inner sand layer.
[0014] Preferably, control valves are installed on the heat medium inlet pipe, heat medium outlet pipe, cold medium inlet pipe, and cold medium outlet pipe, and the control valves are located above the tank cover.
[0015] By adopting the above technical solution, the control valve on the heat medium inlet pipe controls the flow rate of hot gas or hot liquid in the heat medium inlet pipe, the control valve on the heat medium outlet pipe controls the flow rate of hot gas or hot liquid in the heat medium outlet pipe, the control valve on the refrigerant inlet pipe controls the flow rate of cold gas or cold liquid in the refrigerant inlet pipe, and the control valve on the refrigerant outlet pipe controls the flow rate of cold gas or cold liquid in the refrigerant outlet pipe.
[0016] Preferably, a thermometer is installed on each of the heat medium inlet pipe, heat medium outlet pipe, cold medium inlet pipe, and cold medium outlet pipe, and the thermometer is located above the tank cover.
[0017] By adopting the above technical solution, the thermometer on the heat medium inlet pipe detects the temperature of the hot gas or hot liquid inside the heat medium inlet pipe, the thermometer on the heat medium outlet pipe detects the temperature of the hot gas or hot liquid inside the heat medium outlet pipe, the thermometer on the refrigerant inlet pipe detects the temperature of the cold gas or cold liquid inside the refrigerant inlet pipe, and the thermometer on the refrigerant outlet pipe detects the temperature of the cold gas or cold liquid inside the refrigerant outlet pipe.
[0018] Preferably, pressure gauges are installed on the heat medium inlet pipe, heat medium outlet pipe, cold medium inlet pipe, and cold medium outlet pipe, and the pressure gauges are located above the tank cover.
[0019] By adopting the above technical solution, the pressure gauge on the heat medium inlet pipe detects the pressure inside the heat medium inlet pipe, the pressure gauge on the heat medium outlet pipe detects the pressure inside the heat medium outlet pipe, the pressure gauge on the refrigerant inlet pipe detects the pressure inside the refrigerant inlet pipe, and the pressure gauge on the refrigerant outlet pipe detects the pressure inside the refrigerant outlet pipe.
[0020] Preferably, the outer sand layer has an outer mesh cylinder on its inner ring wall, the inner sand layer has an inner mesh cylinder on its outer ring wall, the heating element is located between the outer mesh cylinder and the inner mesh cylinder, the top of the outer mesh cylinder and the top of the inner mesh cylinder are both fixedly connected to the tank lid, the bottom of the outer mesh cylinder and the bottom of the inner mesh cylinder are both provided with a ring plate, there is a gap between the ring plate and the bottom wall of the tank, and the heating element is located above the ring plate.
[0021] By adopting the above technical solution, the heating element is located between the outer mesh cylinder, the inner mesh cylinder, and the ring plate, reducing the friction between the outer and inner sand layers on the heating element.
[0022] In summary, this application includes at least one of the following beneficial technical effects:
[0023] 1. By installing tank body, tank cover, outer sand layer, inner sand layer, electric heating tube, heat medium inlet pipe, refrigerant outlet pipe, heat medium outlet pipe and refrigerant inlet pipe, the safety accident caused by tank leakage is reduced;
[0024] 2. By setting a first insulation layer, a first heat preservation layer, a second insulation layer, and a second heat preservation layer, the heat preservation effect of the outer sand layer and the inner sand layer is improved;
[0025] 3. By setting an outer mesh cylinder, an inner mesh cylinder, and a ring plate, the friction of the outer and inner sand layers on the heating element is reduced. Attached Figure Description
[0026] Figure 1 This is a cross-sectional view of a sand-based heat storage and insulation tank according to an embodiment of this application.
[0027] Figure 2 yes Figure 1 Enlarged view of section A.
[0028] Figure 3 yes Figure 1 Enlarged view of section B.
[0029] Figure 4 This is a schematic diagram illustrating the positional relationship between the heat medium outlet pipe and the heat medium inlet pipe in the embodiments of this application.
[0030] Figure 5 This is a schematic diagram illustrating the positional relationship between the refrigerant outlet pipe and the refrigerant inlet pipe in the embodiments of this application.
[0031] Figure 6 This is a schematic diagram illustrating the positional relationship between the can lid and the control valve in an embodiment of this application.
[0032] Explanation of reference numerals in the attached drawings: 1. Tank body; 11. First insulation layer; 12. First thermal insulation layer; 2. Tank cover; 21. Second insulation layer; 22. Second thermal insulation layer; 3. Outer sand layer; 31. Heating medium outlet pipe; 32. Cooling medium inlet pipe; 4. Inner sand layer; 41. Heating medium inlet pipe; 42. Cooling medium outlet pipe; 5. Electric heating element; 51. Inner mesh cylinder; 52. Outer mesh cylinder; 53. Ring plate; 6. Connecting bolt; 61. Upper connecting seat; 611. Connecting hole; 62. Lower connecting seat; 621. Connecting groove; 7. Control valve; 71. Thermometer; 72. Pressure gauge. Detailed Implementation
[0033] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0034] This application discloses a sand-based heat storage and insulation tank. (Refer to...) Figures 1 to 5The system includes a tank body 1, with a tank cover 2 installed on top of the tank body 1. The tank body 1 is filled with natural colored sand, forming an outer sand layer 3 and an inner sand layer 4, with the outer sand layer 3 nested on top of the inner sand layer 4. An electric heating element 5 is installed between the inner ring wall of the outer sand layer 3 and the outer ring wall of the inner sand layer 4. A heat medium inlet pipe 41 and a refrigerant outlet pipe 42 are installed inside the inner sand layer 4, and a heat medium outlet pipe 31 and a refrigerant inlet pipe 32 are installed inside the outer sand layer 3. The top ends of the heat medium inlet pipe 41, the heat medium outlet pipe 31, the refrigerant inlet pipe 32, and the refrigerant outlet pipe 42, as well as both ends of the electric heating element 5, all penetrate the tank cover 2. The bottom ends of the heat medium inlet pipe 41 and the heat medium outlet pipe 31, and the refrigerant inlet pipe 32 and the refrigerant outlet pipe 42 are connected. The electric heating element 5 is arranged in a serpentine pattern, and the heat medium inlet pipe 41, the heat medium outlet pipe 31, the refrigerant inlet pipe 32, and the refrigerant outlet pipe 42 are all spirally arranged. Because natural colored sand has excellent thermal conductivity and high heat storage capacity, it is used instead of water as the heat storage material in tank 1. This reduces the risk of scale buildup on the inner wall of tank 1 causing corrosion and lowers the risk of leaks leading to safety accidents. When the heating element 5 is energized, the outer sand layer 3 and inner sand layer 4 formed by the natural colored sand absorb heat and store it in tank 1. As hot gas or liquid moves sequentially along the heat medium inlet pipe 41 and heat medium outlet pipe 31, it first exchanges heat with the inner sand layer 4, and then exchanges heat with the outer sand layer 3 after cooling. This process recovers the heat energy from the gas or liquid and stores it in tank 1. When the cold gas or cold liquid moves sequentially along the refrigerant inlet pipe 32 and the refrigerant outlet pipe 42, it first exchanges heat with the outer sand layer 3 for preheating, and then exchanges heat with the inner sand layer 4 for heating, thus achieving the effect of utilizing the heat energy in the tank 1. In the event of an accidental leak in the heat medium inlet pipe 41, heat medium outlet pipe 31, refrigerant inlet pipe 32, or refrigerant outlet pipe 42, the leaked liquid or gas will enter the tank 1, making it less likely that a leak in the tank 1 will lead to a safety accident.
[0035] Reference Figure 1 and Figure 6Control valves 7, pressure gauges 72, and thermometers 71 are installed on the heat medium inlet pipe 41, heat medium outlet pipe 31, and refrigerant inlet pipe 32, respectively. These control valves 7, pressure gauges 72, and thermometers 71 are located above the tank cover 2. The control valve 7 on the heat medium inlet pipe 41 controls the flow rate of the hot gas or liquid within it. The thermometer 71 on the heat medium inlet pipe 41 detects the temperature of the hot gas or liquid within it. The pressure gauge 72 on the heat medium inlet pipe 41 detects the pressure within it. Similarly, the control valve 7 on the heat medium outlet pipe 31 controls the flow rate of the hot gas or liquid within it. The thermometer 71 on the heat medium outlet pipe 31 detects the temperature of the hot gas or liquid within it. The pressure gauge 72 on the heat medium outlet pipe 31 detects the pressure within it. The control valve 7 on the refrigerant inlet pipe 32 controls the flow rate of the cold gas or cold liquid within the refrigerant inlet pipe 32. The thermometer 71 on the refrigerant inlet pipe 32 detects the temperature of the cold gas or cold liquid within the refrigerant inlet pipe 32, and the pressure gauge 72 on the refrigerant inlet pipe 32 detects the pressure within the refrigerant inlet pipe 32. Similarly, the control valve 7 on the refrigerant outlet pipe 42 controls the flow rate of the cold gas or cold liquid within the refrigerant outlet pipe 42. The thermometer 71 on the refrigerant outlet pipe 42 detects the temperature of the cold gas or cold liquid within the refrigerant outlet pipe 42, and the pressure gauge 72 on the refrigerant outlet pipe 42 detects the pressure within the refrigerant outlet pipe 42.
[0036] To enable the lid 2 to be detachably connected to the can body 1, refer to Figure 1 and Figure 2 Several upper connecting seats 61 are welded to the side wall of the tank lid 2, and connecting holes 611 are formed through the upper connecting seats 61. Several lower connecting seats 62 are welded to the outer wall of the tank body 1, and connecting grooves 621 are formed on the top of the lower connecting seats 62. Connecting bolts 6 are provided in the corresponding connecting holes 611 and connecting grooves 621. After the connecting bolts 6 pass through the connecting holes 611, the connecting bolts 6 are threaded into the connecting grooves 621.
[0037] To improve the insulation effect of the outer sand layer 3 and the inner sand layer 4, refer to Figure 1 and Figure 2 The outer wall of tank 1 is covered with rock wool to form a first insulation layer 11, and the inner wall of tank 1 is covered with polyurethane foam to form a first insulation layer 12. The first insulation layer 12 is fitted onto the outer sand layer 3, and the first insulation layer 12 is in close contact with the outer ring wall of the outer sand layer 3. The top wall of tank cover 2 is covered with rock wool to form a second insulation layer 21, and the bottom wall of tank cover 2 is covered with polyurethane foam to form a second insulation layer 22. The top ends of the heat medium inlet pipe 41, the top ends of the heat medium outlet pipe 31, the top ends of the refrigerant inlet pipe 32, the top ends of the refrigerant outlet pipe 42, and both ends of the electric heating pipe 5 all penetrate the second insulation layer 22 and the second insulation layer 21.
[0038] To reduce the friction between the outer sand layer 3 and the inner sand layer 4 and the heating element 5, refer to Figure 1 and Figure 3An outer mesh cylinder 52 is installed on the inner ring wall of the outer sand layer 3, and an inner mesh cylinder 51 is installed on the outer ring wall of the inner sand layer 4. The outer mesh cylinder 52 is fitted onto the inner mesh cylinder 51, and the electric heating tube 5 is located between the outer mesh cylinder 52 and the inner mesh cylinder 51. The tops of both the outer mesh cylinder 52 and the inner mesh cylinder 51 are connected to the tank cover 2, and the bottoms of both the outer mesh cylinder 52 and the inner mesh cylinder 51 are fitted with a ring plate 53. There is a gap between the ring plate 53 and the bottom wall of the tank body 1, and the electric heating tube 5 is located above the ring plate 53.
[0039] The implementation principle of the sand-based heat storage tank in this application embodiment is as follows: When the electric heating element 5 is energized and heats up, the outer sand layer 3 and inner sand layer 4 formed by natural colored sand absorb heat and store the heat energy in the tank body 1. When hot gas or hot liquid moves sequentially along the heat medium inlet pipe 41 and heat medium outlet pipe 31, the hot gas or hot liquid first exchanges heat with the inner sand layer 4, and then exchanges heat with the outer sand layer 3 after cooling down, thus recovering the heat energy in the hot gas or hot liquid and storing it in the tank body 1. When cold gas or cold liquid moves sequentially along the coolant inlet pipe 32 and coolant outlet pipe 42, the cold gas or cold liquid first exchanges heat with the outer sand layer 3 for preheating, and then exchanges heat with the inner sand layer 4 after heating up, thereby achieving the effect of utilizing the heat energy in the tank body 1. Because natural colored sand has excellent thermal conductivity and high heat storage capacity, it can be used instead of water as the heat storage material inside tank 1. This reduces the risk of scale buildup on the inner wall of tank 1 causing corrosion and lowers the risk of leaks leading to safety accidents. In the event of an accidental leak from the heat medium inlet pipe 41, heat medium outlet pipe 31, refrigerant inlet pipe 32, or refrigerant outlet pipe 42, the leaked liquid or gas will enter tank 1, making it less likely that a leak from tank 1 will cause a safety accident.
[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A sand-based heat storage and insulation tank, comprising a tank body, wherein a tank cover is provided on the top of the tank body, characterized in that: The tank body is provided with an outer sand layer and an inner sand layer, with the outer sand layer fitted over the inner sand layer. An electric heating tube is installed between the inner ring wall of the outer sand layer and the outer ring wall of the inner sand layer. A heat medium inlet pipe and a cold medium outlet pipe are installed in the inner sand layer, and a heat medium outlet pipe and a cold medium inlet pipe are installed in the outer sand layer. The top ends of the heat medium inlet pipe, the heat medium outlet pipe, the cold medium inlet pipe, the cold medium outlet pipe, and both ends of the electric heating tube all penetrate the tank cover. The bottom ends of the heat medium inlet pipe and the cold medium outlet pipe are connected. The bottom ends of the cold medium inlet pipe and the cold medium outlet pipe are connected.
2. The sand-based heat storage and insulation tank according to claim 1, characterized in that: A plurality of upper connecting seats are fixedly provided on the side wall of the can lid, and connecting holes are opened through the upper connecting seats. A plurality of lower connecting seats are fixedly provided on the outer wall of the can, and connecting grooves are opened on the lower connecting seats. Connecting bolts are provided in both the connecting holes and the connecting grooves. The connecting bolts pass through the connecting holes and are threadedly connected to the connecting grooves.
3. The sand-based heat storage and insulation tank according to claim 2, characterized in that: The outer wall of the tank is provided with a first heat insulation layer, the inner wall of the tank is provided with a first heat preservation layer, the first heat preservation layer is sleeved on the outer sand layer, the first heat preservation layer is in contact with the outer ring wall of the outer sand layer, the top wall of the tank cover is provided with a second heat insulation layer, the bottom wall of the tank cover is provided with a second heat preservation layer, and the top ends of the heat medium inlet pipe, the top ends of the heat medium outlet pipe, the top ends of the cold medium inlet pipe, the top ends of the cold medium outlet pipe, and both ends of the electric heating tube all penetrate the second heat preservation layer and the second heat insulation layer.
4. The sand-based heat storage and insulation tank according to claim 1, characterized in that: The heat medium inlet pipe, heat medium outlet pipe, cold medium inlet pipe, and cold medium outlet pipe are all spirally arranged, and the electric heating tube is serpentinely arranged.
5. A sand-based heat storage and insulation tank according to claim 1, characterized in that: Control valves are installed on the heat medium inlet pipe, heat medium outlet pipe, cold medium inlet pipe, and cold medium outlet pipe, and the control valves are located above the tank cover.
6. A sand-based heat storage and insulation tank according to claim 5, characterized in that: Thermometers are installed on the heat medium inlet pipe, heat medium outlet pipe, cold medium inlet pipe, and cold medium outlet pipe, and the thermometers are located above the tank cover.
7. A sand-based heat storage and insulation tank according to claim 5, characterized in that: Pressure gauges are installed on the heat medium inlet pipe, heat medium outlet pipe, cold medium inlet pipe, and cold medium outlet pipe, and the pressure gauges are located above the tank cover.
8. A sand-based heat storage and insulation tank according to claim 1, characterized in that: An outer mesh cylinder is provided on the inner ring wall of the outer sand layer, and an inner mesh cylinder is provided on the outer ring wall of the inner sand layer. The electric heating tube is located between the outer mesh cylinder and the inner mesh cylinder. The top of the outer mesh cylinder and the top of the inner mesh cylinder are both fixedly connected to the tank lid. The bottom of the outer mesh cylinder and the bottom of the inner mesh cylinder are jointly provided with a ring plate. There is a gap between the ring plate and the bottom wall of the tank. The electric heating tube is located above the ring plate.