A year-round thermal storage and winter heating system for underground water storage in mines

Abstract

This utility model belongs to the field of mining area heating technology, and particularly relates to a year-round heat storage and winter heating system for underground water storage in mines. This utility model has three working modes: heat storage mode, heating mode, and heat storage-heating mode. This utility model provides a stable and low-cost heating solution for remote mining areas. It does not rely on gas boilers with limited fuel transportation and high operating costs. It utilizes underground water storage tanks to efficiently store solar thermal energy and deeply couples them with high-temperature heat pumps to form a closed-loop cycle of "daytime heat storage - nighttime / rainy day heat extraction". This achieves high energy efficiency, stable operation and significant energy saving and cost reduction, effectively overcoming the defects of unstable solar heating and ensuring continuous and reliable heating even under conditions of no sunlight, such as rainy days and nighttime.

Description

Technical Field

[0001] This utility model belongs to the field of mining area heating technology, and in particular relates to a year-round heat storage and winter heating system for underground water storage in mines. Background Technology

[0002] The issue of winter heating in remote mining areas is becoming increasingly prominent, posing a key bottleneck to their green and sustainable development. These mining areas are generally located in areas with poor transportation and weak infrastructure. On the one hand, most mines themselves have inherently insufficient heat source conditions. They not only lack recyclable industrial waste heat resources such as return air waste heat, drainage waste heat, and air compressor waste heat, but also, due to their remote location and high pipeline construction costs, they are unable to connect to the municipal centralized heating network, resulting in a severe lack of basic heating conditions. On the other hand, traditional coal-fired heating methods are no longer applicable, cutting off this heating path at its source.

[0003] While gas-fired boilers can meet emission requirements among alternative heating solutions, they are limited by the logistical conditions in remote mining areas. Fuel transportation must traverse complex terrain, resulting in long transportation cycles, significant losses, and substantial increases in fuel procurement and storage costs. Under long-term operation, it is difficult to guarantee the stability and economy of heating, and thus cannot fundamentally solve the essential need for winter heating in mining areas. In summary, remote mining areas currently face the practical dilemma of "no qualified heat source available" and are constrained by both "cost control and operational stability." Therefore, a year-round heat storage and winter heating system using underground water storage in mines is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a year-round heat storage and winter heating system for underground water storage in mines to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A year-round thermal storage and winter heating system for underground water storage in mines, comprising:

[0007] A heat storage mechanism is installed below the mine shaft, and a first heat exchange component is installed inside the heat storage mechanism;

[0008] A solar thermal collector is installed on the ground surface, and the solar thermal collector is connected to the heat storage mechanism for heat exchange through a second heat exchange component and a first heat exchange component.

[0009] The heat extraction mechanism is heat exchanged with the heat storage mechanism through the third heat exchange component and the first heat exchange component, and the second heat exchange component and the third heat exchange component are arranged in parallel.

[0010] Heat users connect to the third heat exchange component for heat exchange via a high-temperature heat pump unit.

[0011] In the mine underground water storage and winter heating system of this utility model, the heat storage mechanism includes an underground water storage tank, which is filled with water.

[0012] In the mine underground water storage system of this utility model, the first heat exchange component includes a first heat exchanger, which is installed in the underground water storage tank and submerged by water.

[0013] In the year-round heat storage and winter heating system for underground water storage in mines of this utility model, the solar thermal collector includes multiple solar collectors, which are connected in parallel.

[0014] In the mine underground water storage and winter heating system of this utility model, the second heat exchange component includes a second heat exchanger. The cold water outlet of the second heat exchanger is connected to the cold water inlet of a plurality of solar collectors. The hot water outlet of the plurality of solar collectors is connected to the hot water inlet of the second heat exchanger. A heat storage circulation pump is provided between the cold water outlet of the second heat exchanger and the cold water inlet of the solar collectors. A first electric valve is provided between the hot water outlet of the solar collectors and the hot water inlet of the second heat exchanger.

[0015] The hot water outlet of the second heat exchanger is connected to the hot water inlet of the first heat exchanger, and the cold water inlet of the second heat exchanger is connected to the cold water outlet of the first heat exchanger. A downhole hot water pump and a second electric valve are provided between the cold water inlet of the second heat exchanger and the cold water outlet of the first heat exchanger.

[0016] In the year-round heat storage and winter heating system for underground water storage in mines of this utility model, the third heat exchange component includes a third heat exchanger. The hot water inlet of the third heat exchanger is connected to the cold water outlet of the first heat exchanger. The underground hot water pump is located between the hot water inlet of the third heat exchanger and the cold water outlet of the first heat exchanger. The cold water outlet of the third heat exchanger is connected to the hot water inlet of the first heat exchanger.

[0017] The hot water outlet of the third heat exchanger is connected to the hot water inlet of the high-temperature heat pump unit, the cold water inlet of the third heat exchanger is connected to the cold water outlet of the high-temperature heat pump unit, and a heat extraction circulation pump is provided between the cold water inlet of the third heat exchanger and the cold water outlet of the high-temperature heat pump unit.

[0018] In the year-round heat storage and winter heating system for underground water storage in mines of this utility model, the hot water inlet of the heat user is connected to the hot water outlet of the high-temperature heat pump unit, the cold water outlet of the heat user is connected to the cold water inlet of the high-temperature heat pump unit, and a hot water pump is provided between the hot water inlet of the heat user and the hot water outlet of the high-temperature heat pump unit.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] This utility model has three working modes.

[0021] 1. Heat storage mode: After the solar thermal collector collects solar heat, the heat is transferred to the heat storage mechanism through the second heat exchange component and the first heat exchange component to store the heat.

[0022] 2. Heating mode: After the heat extraction mechanism extracts the heat from the heat storage mechanism, the heat is transferred to the high-temperature heat pump unit through the third heat exchange component. The high-temperature heat pump unit then boosts the heat and sends it to the heat users for heating.

[0023] 3. Heat storage-heat supply mode: After the solar thermal collector collects solar heat, the heat is transferred to the heat storage unit through the second heat exchange component and the first heat exchange component to store the heat. At the same time, the heat extraction component extracts the heat from the heat storage unit and transfers the heat to the high-temperature heat pump unit through the third heat exchange component. The high-temperature heat pump unit then boosts the heat and sends it to the heat users for heating.

[0024] This utility model provides a stable and low-cost heating solution for remote mining areas. It eliminates the need to rely on gas-fired boilers, which are subject to fuel transportation restrictions and high operating costs. It utilizes underground water storage tanks to efficiently store solar thermal energy and deeply couples them with high-temperature heat pumps to form a closed-loop cycle of "daytime heat storage - nighttime / rainy day heat extraction". This achieves high energy efficiency, stable operation, and significant energy saving and cost reduction, effectively overcoming the instability of solar heating and ensuring continuous and reliable heating even under conditions of no sunlight, such as rainy days or nighttime. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] The components include: 1. Downhole water storage tank; 2. First heat exchanger; 3. Solar collector; 4. Second heat exchanger; 5. High-temperature heat pump unit; 6. Third heat exchanger; 7. Heat extraction circulation pump; 8. Downhole hot water pump; 9. Heat storage circulation pump; 10. Hot water supply pump; 11. Heat storage liquid supply pipe; 12. Heat storage liquid return pipe; 13. Heating water supply pipe; 14. Heating return water pipe; 15. First electric valve; 16. Downhole heat extraction water supply pipe; 17. Downhole heat extraction return water pipe; 18. Downhole heat storage water supply pipe; 19. Downhole heat storage return water pipe; 20. Second electric valve. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1 This utility model discloses a year-round heat storage and winter heating system for underground water storage in mines, comprising:

[0031] A heat storage mechanism is installed below the mine shaft, and a first heat exchange component is installed inside the heat storage mechanism;

[0032] A solar thermal collector is installed on the ground surface. The solar thermal collector is connected to the thermal storage mechanism for heat exchange through a second heat exchange component and a first heat exchange component.

[0033] The heat extraction mechanism is connected to the heat storage mechanism for heat exchange through the third heat exchange component and the first heat exchange component, and the second heat exchange component and the third heat exchange component are arranged in parallel.

[0034] Heat users connect to the third heat exchange component for heat exchange through the high-temperature heat pump unit 5.

[0035] In one alternative, the heat storage mechanism includes a downhole water storage tank 1, which is filled with water.

[0036] In one alternative embodiment, the first heat exchange assembly includes a first heat exchanger 2, which is disposed within a downhole water storage tank 1 and submerged in water.

[0037] In one alternative embodiment, the solar thermal collector includes multiple solar collectors 3 connected in parallel.

[0038] In one alternative embodiment, the second heat exchange component includes a second heat exchanger 4. The cold water outlet of the second heat exchanger 4 is connected to the cold water inlet of a plurality of solar collectors 3 through a heat storage liquid supply pipe 11. The hot water outlet of the plurality of solar collectors 3 is connected to the hot water inlet of the second heat exchanger 4 through a heat storage liquid return pipe 12. A heat storage circulation pump 9 is provided between the cold water outlet of the second heat exchanger 4 and the cold water inlet of the solar collectors 3. The heat storage circulation pump 9 is close to the second heat exchanger 4. A first electric valve 15 is provided between the hot water outlet of the solar collectors 3 and the hot water inlet of the second heat exchanger 4.

[0039] The hot water outlet of the second heat exchanger 4 is connected to the hot water inlet of the first heat exchanger 2 through the underground heat storage return water pipe 19. The cold water inlet of the second heat exchanger 4 is connected to the cold water outlet of the first heat exchanger 2 through the underground heat storage water supply pipe 18. An underground hot water pump 8 and a second electric valve 20 are installed between the cold water inlet of the second heat exchanger 4 and the cold water outlet of the first heat exchanger 2. The second electric valve 20 is installed on the underground heat storage water supply pipe 18.

[0040] In one alternative embodiment, the third heat exchange component includes a third heat exchanger 6, the hot water inlet of the third heat exchanger 6 is connected to the cold water outlet of the first heat exchanger 2 through a downhole heat extraction water supply pipe 16, the downhole hot water pump 8 is located on the downhole heat extraction water supply pipe 16, the downhole hot water pump 8 is located between the hot water inlet of the third heat exchanger 6 and the cold water outlet of the first heat exchanger 2, and the cold water outlet of the third heat exchanger 6 is connected to the hot water inlet of the first heat exchanger 2 through a downhole heat extraction return water pipe 17.

[0041] The hot water outlet of the third heat exchanger 6 is connected to the hot water inlet of the high-temperature heat pump unit 5, and the cold water inlet of the third heat exchanger 6 is connected to the cold water outlet of the high-temperature heat pump unit 5. A heat extraction circulation pump 7 is installed between the cold water inlet of the third heat exchanger 6 and the cold water outlet of the high-temperature heat pump unit 5.

[0042] In one alternative scheme, the hot water inlet of the heat user is connected to the hot water outlet of the high-temperature heat pump unit 5 through a heating water supply pipe 13, and a hot water pump 10 is installed on the heating water supply pipe 13. The cold water outlet of the heat user is connected to the cold water inlet of the high-temperature heat pump unit 5 through a heating return water pipe 14, and a hot water pump 10 is installed between the hot water inlet of the heat user and the hot water outlet of the high-temperature heat pump unit 5.

[0043] Specific work process:

[0044] In non-heating thermal storage conditions, under sunshine, a thermal storage mode is adopted. The thermal storage supply pipe 11 and the thermal storage return pipe 12 are filled with ethylene glycol solution. The solar collector 3 transfers solar heat to the ethylene glycol solution, causing its temperature to rise continuously. When the solution temperature reaches the preset value, the first electric valve 15 opens, and the thermal storage circulation pump 9 starts, circulating and absorbing and transporting solar heat to the second heat exchanger 4. When the temperature of the ethylene glycol solution is detected to be higher than the set upper limit, the second electric valve 20 and the underground hot water pump 8 open synchronously. Under the action of the underground hot water pump 8, the water in the first heat exchanger 2 enters the second heat exchanger 4 through the underground hot water supply pipe 16 and the underground thermal storage supply pipe 18 for heat exchange. The water that has absorbed heat enters the first heat exchanger 2 through the underground thermal storage return pipe 19 and the underground hot water return pipe 17. The water in the underground water storage tank 1 exchanges heat with the water in the first heat exchanger 2, thus utilizing solar energy for efficient thermal storage during the non-heating season.

[0045] During the heating season, in the absence of sunlight, the second electric valve 20 closes, the heat storage circulation pump 9 stops, and the heat extraction circulation pump 7 starts. The underground hot water pump 8 circulates the water in the first heat exchanger 2 between the underground heat extraction supply pipe 16, the third heat exchanger 6, the underground heat extraction return pipe 17, and the first heat exchanger 2. The heat stored in the underground water storage tank 1 is transferred to the third heat exchanger 6 through the first heat exchanger 2. The heat extraction circulation pump 7 circulates the water between the third heat exchanger 6 and the high-temperature heat pump unit 5, transferring the heat to the high-temperature heat pump unit 5. The high-temperature heat pump unit 5 upgrades the low-grade heat to high-grade heat. The hot water supply pump 10 circulates the water between the heat users, the heating supply pipe 13, the heating return pipe 14, and the high-temperature heat pump unit 5 to achieve heating.

[0046] During the heating season, when heat storage and heating are carried out simultaneously, under sunny conditions, the first electric valve 15 opens, and the heat storage circulation pump 9 starts, absorbing and transporting solar heat to the second heat exchanger 4. When the temperature of the ethylene glycol solution is detected to be higher than the set upper limit, the second electric valve 20 and the underground hot water pump 8 open synchronously. Under the action of the underground hot water pump 8, water in the first heat exchanger 2 enters the second heat exchanger 4 through the underground hot water supply pipe 16 and the underground heat storage supply pipe 18 for heat exchange. The water that has absorbed heat enters the first heat exchanger 2 through the underground heat storage return pipe 19 and the underground hot water return pipe 17. The water in the underground water storage tank 1 exchanges heat with the water in the first heat exchanger 2, and the heat extraction circulation pump 7 starts. The system operates by: 1) The underground hot water pump 8 circulates the water in the first heat exchanger 2 between the underground hot water supply pipe 16, the third heat exchanger 6, the underground hot water return pipe 17, and the first heat exchanger 2. The heat stored in the underground water storage tank 1 is transferred to the third heat exchanger 6 via the first heat exchanger 2. 2) The hot water circulation pump 7 circulates the water between the third heat exchanger 6 and the high-temperature heat pump unit 5, transferring the heat to the high-temperature heat pump unit 5. The high-temperature heat pump unit 5 upgrades the low-grade heat to high-grade heat. 3) The hot water supply pump 10 circulates the water between the heat user, the heating supply pipe 13, the heating return pipe 14, and the high-temperature heat pump unit 5. During the day, solar energy is used to store heat, and the high-temperature heat pump unit 5 continuously provides heating to the user.

[0047] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A mine underground water storage all-year heat storage and winter heat supply system, characterized in that, include: A heat storage mechanism is installed below the mine shaft, and a first heat exchange component is installed inside the heat storage mechanism; A solar thermal collector is installed on the ground surface, and the solar thermal collector is connected to the heat storage mechanism for heat exchange through a second heat exchange component and a first heat exchange component. The heat extraction mechanism is heat exchanged with the heat storage mechanism through the third heat exchange component and the first heat exchange component, and the second heat exchange component and the third heat exchange component are arranged in parallel. The heat user is connected to the third heat exchange component for heat exchange through a high-temperature heat pump unit (5).

2. The mine underground water storage, all-year heat storage and winter heat supply system according to claim 1, characterized in that: The heat storage mechanism includes an underground water storage tank (1), which is filled with water.

3. The mine underground water storage, all-year heat storage and winter heat supply system according to claim 2, characterized in that: The first heat exchange component includes a first heat exchanger (2), which is disposed in the downhole water storage tank (1) and submerged by water.

4. The mine underground water storage, all-year heat storage and winter heat supply system according to claim 3, characterized in that: The solar thermal collector mechanism includes multiple solar thermal collectors (3), which are arranged in parallel.

5. The all-year heat storage and winter heat supply system for mine water storage underground according to claim 4, characterized in that: The second heat exchange component includes a second heat exchanger (4), the cold water outlet of the second heat exchanger (4) is connected to the cold water inlet of the plurality of solar collectors (3), the hot water outlet of the plurality of solar collectors (3) is connected to the hot water inlet of the second heat exchanger (4), a heat storage circulation pump (9) is provided between the cold water outlet of the second heat exchanger (4) and the cold water inlet of the solar collectors (3), and a first electric valve (15) is provided between the hot water outlet of the solar collectors (3) and the hot water inlet of the second heat exchanger (4). The hot water outlet of the second heat exchanger (4) is connected to the hot water inlet of the first heat exchanger (2), the cold water inlet of the second heat exchanger (4) is connected to the cold water outlet of the first heat exchanger (2), and a well hot water pump (8) and a second electric valve (20) are provided between the cold water inlet of the second heat exchanger (4) and the cold water outlet of the first heat exchanger (2).

6. The all-year heat accumulating and winter heating system for mine water storage underground according to claim 5, characterized in that: The third heat exchange component includes a third heat exchanger (6), the hot water inlet of the third heat exchanger (6) is connected to the cold water outlet of the first heat exchanger (2), the downhole hot water pump (8) is located between the hot water inlet of the third heat exchanger (6) and the cold water outlet of the first heat exchanger (2), and the cold water outlet of the third heat exchanger (6) is connected to the hot water inlet of the first heat exchanger (2). The hot water outlet of the third heat exchanger (6) is connected to the hot water inlet of the high-temperature heat pump unit (5), the cold water inlet of the third heat exchanger (6) is connected to the cold water outlet of the high-temperature heat pump unit (5), and a heat extraction circulation pump (7) is provided between the cold water inlet of the third heat exchanger (6) and the cold water outlet of the high-temperature heat pump unit (5).

7. The mine underground water storage, all-year heat storage and winter heat supply system according to claim 1, characterized in that: The hot water inlet of the heat user is connected to the hot water outlet of the high-temperature heat pump unit (5), the cold water outlet of the heat user is connected to the cold water inlet of the high-temperature heat pump unit (5), and a hot water pump (10) is provided between the hot water inlet of the heat user and the hot water outlet of the high-temperature heat pump unit (5).

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