Solar cross-seasonal heat storage and supply system

Abstract

The utility model provides a solar cross-seasonal heat storage and supply system, and relates to the field of coal mine heat supply. Comprising a solar heat collector, a heat collection temperature controller, a heat collection control valve, a heat collection heat exchanger, a liquid supplementing and pressure stabilizing device, a heat collection circulating pump, a heat storage circulating pump, a heat storage water tank, a heat supply temperature controller, an ethylene glycol storage tank, a softening device, a primary side heat supply circulating pump, a heat storage water tank make-up pump, a secondary side make-up pump, a compressor, a condenser, an expansion valve, an evaporator and an indirect heat supply plate type heat exchanger. The heat storage and supply system comprises an indirect heat supply primary side water return control valve, an indirect heat supply secondary side water outlet control valve, an indirect heat supply primary side water outlet control valve, an indirect heat supply secondary side water return control valve, a water source heat pump heat supply evaporation side water outlet control valve and a water source heat pump heat supply evaporation side water return control valve. And heat is stored in the heat storage water tank for heating in winter in the mining area, so that the utilization rate of solar energy is improved, and the energy consumption of heating in winter is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine heating, in particular to a solar energy cross-seasonal heat storage heating system. Background Art

[0002] Many existing coal mine heating systems use gas boilers as heat sources. This heating method will emit a large amount of harmful gases such as nitrogen oxides, pollute the environment and aggravate the greenhouse effect. As environmental protection policies become more and more stringent, coal mining companies must tap into energy-saving potential in order to comply with national and local energy-saving and emission reduction policies. Coal mine heating urgently needs to participate in the rapid development of new energy. Solar energy is inexhaustible, does not require long-distance transportation, and is a clean energy source. The development of solar thermal collection technology has also laid a solid foundation for coal mine heating. The solar inter-seasonal heat storage heating system is a technology with great energy-saving potential for the coal mining industry. Utility Model Content

[0003] In view of the existing high-pollution and high-energy consumption coal mine heating methods, the purpose of this utility model is to provide a solar energy cross-seasonal heat storage and heating system to carry out heating transformation in coal mine areas that use fossil energy such as coal as boiler fuel for heating, thereby ensuring stable heating while reducing pollutant emissions.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a solar energy inter-seasonal heat storage heating system, comprising a solar energy collector, a heat collection thermostat, a heat collection control valve, a heat collection heat exchanger, a liquid replenishment and pressure stabilizing device, a heat collection circulation pump, a heat storage circulation pump, a heat storage tank, a heating thermostat, an ethylene glycol storage tank, a softening device, a primary side heating circulation pump, a heat storage tank water supply pump, a secondary side water supply pump, a compressor, a condenser, an expansion valve, an evaporator, an indirect heating plate heat exchanger, an indirect heating primary side return water control valve, an indirect heating secondary side outlet water control valve, an indirect heating primary side outlet water control valve, an indirect heating secondary side return water control valve, a water source heat pump heating evaporation side outlet water control valve, a water source heat pump heating evaporation side return water control valve, a water source heat pump heating condensation side outlet water control valve, a water source heat pump heating condensation side return water control valve and a secondary side heating circulation pump;

[0005] The water outlet of the solar thermal collector is connected with the thermal collector control valve, the thermal collector temperature controller is arranged on the connecting pipe between the solar thermal collector and the thermal collector control valve, the thermal collector control valve is connected with the water inlet of the thermal collector heat exchanger, the water outlet of the thermal collector heat exchanger is connected with the water inlet of the thermal collector circulation pump, and the water outlet of the thermal collector circulation pump is connected with the solar thermal collector;

[0006] The second water outlet end of the heat collector heat exchanger is connected to the first water inlet end of the heat storage tank, the first water outlet end of the heat storage tank is connected to the water inlet end of the heat storage circulation pump, and the water outlet end of the heat storage circulation pump is connected to the second water inlet end of the heat collector heat exchanger;

[0007] The second water outlet end of the heat storage tank is connected to the water inlet end of the primary-side heating circulation pump, the heating thermostat is arranged on the connecting pipe between the second water outlet end of the heat storage tank and the primary-side heating circulation pump, the first water outlet end of the primary-side heating circulation pump is connected to the indirect heating primary-side return water control valve, the indirect heating primary-side return water control valve is connected to the first water inlet end of the indirect heating plate heat exchanger, the first water outlet end of the indirect heating plate heat exchanger is connected to the indirect heating primary-side water outlet control valve, and the indirect heating primary-side water outlet control valve is connected to the second water inlet end of the heat storage tank;

[0008] The second water outlet end of the indirect heating plate heat exchanger is connected to the indirect heating secondary side water outlet control valve, the indirect heating secondary side water outlet control valve is connected to the heating water supply pipeline, the second water inlet end of the indirect heating plate heat exchanger is connected to the indirect heating secondary side return water control valve, the indirect heating secondary side return water control valve is connected to the water outlet end 1 of the secondary side heating circulation pump, and the water inlet end of the secondary side heating circulation pump is connected to the heating return water pipeline;

[0009] The water outlet end 2 of the primary side heating circulation pump is connected to the water source heat pump heating evaporation side return water control valve, the water source heat pump heating evaporation side return water control valve is connected to the water inlet end 1 of the evaporator, the water outlet end 1 of the evaporator is connected to the water source heat pump heating evaporation side water outlet control valve, the water source heat pump heating evaporation side water outlet control valve is connected to the connecting pipe between the indirect heating primary side water outlet control valve and the hot water storage tank, the water outlet end 2 of the evaporator is connected to the expansion valve, and the expansion valve is connected to the water inlet end 1 of the condenser. The first water outlet end of the condenser is connected to the compressor, the compressor is connected to the second water inlet end of the evaporator, the second water outlet end of the condenser is connected to the water outlet control valve on the heating condensing side of the water source heat pump, the water outlet control valve on the heating condensing side of the water source heat pump is connected to the connecting pipe between the indirect heating secondary side water outlet control valve and the heating water supply pipe, the second water outlet end of the secondary side heating circulation pump is connected to the return water control valve on the heating condensing side of the water source heat pump, and the return water control valve on the heating condensing side of the water source heat pump is connected to the second water inlet end of the condenser.

[0010] Preferably, the liquid replenishing and pressure stabilizing device is connected to a connecting pipe between a water outlet end of the heat collector heat exchanger and a water inlet end of the heat collector circulation pump, and the liquid replenishing and pressure stabilizing device is connected to the ethylene glycol storage tank.

[0011] Preferably, the medium stored in the ethylene glycol storage tank is ethylene glycol antifreeze.

[0012] Preferably, the water inlet end of the softening device is connected to the tap water pipeline, the water outlet end 1 of the softening device is connected to the water inlet end of the hot water tank replenishment pump, and the water outlet end of the hot water tank replenishment pump is connected to the water inlet end 3 of the hot water tank.

[0013] Preferably, the second water outlet end of the softening device is connected to the water inlet end of the secondary side water supply pump, and the water outlet end of the secondary side water supply pump is connected to the connecting pipe between the secondary side heating circulation pump and the heating return water pipe.

[0014] Preferably, the solar thermal collector is a flat-plate collector.

[0015] Preferably, the heat storage tank is a horizontal partitioned water storage tank.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. Use water source heat pump technology combined with solar cross-seasonal heat storage technology to collect solar thermal energy, use new energy to provide heating for coal mine welfare buildings and shaft anti-freezing, and realize the recycling of solar waste heat.

[0018] 2. Effectively utilize solar energy resources, greatly increase the proportion of renewable energy in coal mine heating systems, and reduce fossil fuel consumption and pollutant emissions.

[0019] 3. Use water source heat pump as auxiliary heat source to deal with the situation in winter when the solar heat storage capacity is low and the water outlet temperature of the hot water storage tank is low, which cannot meet the normal production and life conditions in the mining area, thus ensuring the stability of the heating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the solar energy inter-seasonal heat storage and heating system of the utility model.

[0021] Numbers in the figure: 1. Solar collector; 2. Collector thermostat; 3. Collector control valve; 4. Collector heat exchanger; 5. Liquid replenishment and pressure stabilization device; 6. Collector circulation pump; 7. Heat storage circulation pump; 8. Heat storage tank; 9. Heating thermostat; 10. Ethylene glycol storage tank; 11. Softening device; 12. Primary side heating circulation pump; 13. Heat storage tank water supply pump; 14. Secondary side water supply pump; 15. Compressor; 16. Condenser; 17. Expansion valve; 18. Evaporator; 19. , indirect heating plate heat exchanger; 20, indirect heating primary side return water control valve; 21, indirect heating secondary side outlet water control valve; 22, indirect heating primary side outlet water control valve; 23, indirect heating secondary side return water control valve; 24, water source heat pump heating evaporation side outlet water control valve; 25, water source heat pump heating evaporation side return water control valve; 26, water source heat pump heating condensation side outlet water control valve; 27, water source heat pump heating condensation side return water control valve; 28, secondary side heating circulation pump. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a solar energy cross-season heat storage heating system, such as Figure 1 As shown, it includes a solar collector 1, a heat collector thermostat 2, a heat collector control valve 3, a heat collector heat exchanger 4, a liquid replenishment and pressure stabilizing device 5, a heat collector circulation pump 6, a heat storage circulation pump 7, a hot water storage tank 8, a heating thermostat 9, an ethylene glycol storage tank 10, a softening device 11, a primary side heating circulation pump 12, a hot water storage tank water replenishment pump 13, a secondary side water replenishment pump 14, a compressor 15, a condenser 16, an expansion valve 17, an evaporator 18, an indirect heating plate Heat exchanger 19, indirect heating primary side return water control valve 20, indirect heating secondary side outlet water control valve 21, indirect heating primary side outlet water control valve 22, indirect heating secondary side return water control valve 23, water source heat pump heating evaporation side outlet water control valve 24, water source heat pump heating evaporation side return water control valve 25, water source heat pump heating condensation side outlet water control valve 26, water source heat pump heating condensation side return water control valve 27 and secondary side heating circulation pump 28.

[0024] The solar inter-seasonal heat storage heating system forms a solar heat collection cycle, a solar heat storage cycle, an indirect heating cycle and a water source heat pump heating cycle.

[0025] The solar thermal cycle is used to collect solar energy resources;

[0026] The solar thermal collector 1 is connected to the heat collecting side of the heat collecting heat exchanger 4 through a connecting pipe via a heat collecting control valve 3 , and the heat collecting temperature controller 2 and the heat collecting circulation pump 6 are arranged on the connecting loop between the solar thermal collector 1 and the heat collecting heat exchanger 4 .

[0027] The ethylene glycol storage tank 10 is connected to the connecting pipe where the heat collection circulation pump 6 is located through the liquid replenishment and pressure stabilizing device 5. The ethylene glycol storage tank 10 contains ethylene glycol antifreeze liquid, which is the heat exchange medium in the heat collection circulation.

[0028] The solar thermal storage cycle is used to store the collected solar heat in the thermal storage tank 8;

[0029] The heat exchange side of the heat collector heat exchanger 4 is arranged on a communication loop of a group of outlets and inlets of the hot water storage tank 8 , and a heat storage circulation pump 7 is arranged on the communication pipeline between the outlet of the hot water storage tank 8 and the heat collector heat exchanger 4 .

[0030] The indirect heating cycle is used to convert the heat in the hot water storage tank 8 and output it to the heating water supply pipeline to provide heat to the user end;

[0031] A group of outlets of the heat storage tank 8 are connected to the heat collection side of the indirect heating plate heat exchanger 19 through connecting pipes, in turn, through the heating thermostat 9, the primary side heating circulation pump 12, and the indirect heating primary side return water control valve 20. The outlet end of the heat collection side of the indirect heating plate heat exchanger 19 is connected to the heat storage tank 8 through a connecting pipe. The outlet end of the heat exchange side of the indirect heating plate heat exchanger 19 is connected to the heating water supply pipe through a connecting pipe through the indirect heating secondary side water outlet control valve 21 to supply heat to the user end. The inlet end of the heat exchange side of the indirect heating plate heat exchanger 19 is connected to the heating return water pipe through a connecting pipe through the indirect heating secondary side return water control valve 23. A secondary side heating circulation pump 28 is provided on the connecting pipe between the heating return water pipe and the indirect heating secondary side return water control valve 23, which is used to pressurize the heating return water and accelerate the circulation of the heating water flow.

[0032] The water source heat pump heating cycle is used to provide heating to the user end when the solar heat collection effect is poor;

[0033] A connecting branch pipe is provided on the connecting pipe between the primary side heating circulation pump 12 and the indirect heating primary side return water control valve 20. The heat storage tank 8 is connected to the evaporator 18 through the connecting branch pipe via the water source heat pump heating evaporation side return water control valve 25. The outlet end of the evaporator 18 is connected to the connecting pipe of the heat storage tank 8 through the water source heat pump heating evaporation side outlet water control valve 24 and the indirect heating primary side outlet water control valve 22. The circulation loop of the evaporator 18 and the condenser 16 is provided with a compressor 15 and an expansion valve 17. The compressor 15 is provided on the output end pipe of the evaporator 18, and the expansion valve 17 is provided on the input end pipe of the evaporator 18. The output end of the condenser 16 is connected to the heating water supply pipeline through a connecting pipe through the water source heat pump heating condensing side water outlet control valve 26, and the input end of the condenser 16 is connected to the heating return water pipeline through a connecting pipe through the water source heat pump heating condensing side return water control valve 27. The compressor 15, condenser 16, expansion valve 17 and evaporator 18 constitute a water source heat pump unit.

[0034] The input end of the softening device 11 is connected to a tap water pipe, and one group of output ends of the softening device 11 is connected to the hot water storage tank 8 through a connecting pipe via a hot water storage tank water replenishment pump 13 to replenish softened water to the hot water storage tank 8. Another group of output ends of the softening device 11 is connected to the heating return water pipe through a connecting pipe via a secondary side water replenishment pump 14, and is located on the rear side of the water inlet end of the secondary side heating circulation pump 28 to replenish the water lost during the heating cycle.

[0035] In this solar thermal storage heating system, when the outlet water temperature of the hot water storage tank 8 is ≥55°C, the heating system is indirect heating. At this time, the indirect heating primary side return water control valve 20, the indirect heating primary side outlet water control valve 22, the indirect heating secondary side return water control valve 23 and the indirect heating secondary side outlet water control valve 21 are in an open state. The medium flows out from the user side outlet of the hot water storage tank 8, passes through the heating thermostat 9 and the indirect heating primary side return water control valve 20, enters the indirect heating plate heat exchanger 19, and then passes through the indirect heating primary side outlet water control valve 22 to enter the hot water storage tank 8 to complete the primary side circulation. The secondary side hot water flowing out of the indirect heating plate heat exchanger 19 passes through the indirect heating secondary side return water control valve 23, passes through the secondary side heating circulation pump 28, and flows into the terminal to provide heating for the user end. The heated medium flows out, passes through the indirect heating secondary side outlet water control valve 21, and enters the indirect heating plate heat exchanger 19 to complete the secondary circulation.

[0036] When the outlet water temperature of the hot water storage tank 8 is lower than 55°C, the heating system is heated by the water source heat pump. At this time, the water source heat pump heating evaporation side outlet water control valve 24, the water source heat pump heating evaporation side return water control valve 25, the water source heat pump heating condensation side outlet water control valve 26, the water source heat pump heating condensation side return water control valve 27, the primary side heating circulation pump 12 and the secondary side heating circulation pump 28 are in an open state. After the hot water flowing out of the hot water storage tank 8 passes through the evaporator 18 for heat exchange, it flows into the hot water storage tank 8 through the water source heat pump heating evaporation side outlet water control valve 24 to complete the evaporation side circulation. The heat absorbed on the evaporation side passes through the water source heat pump unit, and a small amount of high-level electric energy is input to realize the transfer of low-level heat energy to high-level heat energy. The hot water flowing out of the condenser 16 passes through the water source heat pump heating condensation side outlet water control valve 26 to provide heating for the user end. The return water enters the condenser 16 after passing through the water source heat pump heating condensation side return water control valve 27 to complete the heating cycle.

[0037] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A solar energy inter-seasonal heat storage and heating system, characterized in that: The invention comprises a solar thermal collector (1), a thermal collector thermostat (2), a thermal collector control valve (3), a thermal collector heat exchanger (4), a liquid replenishment pressure stabilizing device (5), a thermal collector circulation pump (6), a thermal storage circulation pump (7), a hot water storage tank (8), a heating thermostat (9), an ethylene glycol storage tank (10), a softening device (11), a primary side heating circulation pump (12), a hot water storage tank water replenishment pump (13), a secondary side water replenishment pump (14), a compressor (15), a condenser (16), an expansion valve (17), an evaporator (18), Indirect heating plate heat exchanger (19), indirect heating primary side return water control valve (20), indirect heating secondary side outlet water control valve (21), indirect heating primary side outlet water control valve (22), indirect heating secondary side return water control valve (23), water source heat pump heating evaporation side outlet water control valve (24), water source heat pump heating evaporation side return water control valve (25), water source heat pump heating condensation side outlet water control valve (26), water source heat pump heating condensation side return water control valve (27) and secondary side heating circulation pump (28); The water outlet of the solar thermal collector (1) is connected to the heat collection control valve (3), the heat collection temperature controller (2) is arranged on the connecting pipe between the solar thermal collector (1) and the heat collection control valve (3), the heat collection control valve (3) is connected to the water inlet of the heat collection heat exchanger (4), the water outlet of the heat collection heat exchanger (4) is connected to the water inlet of the heat collection circulation pump (6), and the water outlet of the heat collection circulation pump (6) is connected to the solar thermal collector (1); The second water outlet end of the heat collector heat exchanger (4) is connected to the first water inlet end of the heat storage tank (8), the first water outlet end of the heat storage tank (8) is connected to the water inlet end of the heat storage circulation pump (7), and the water outlet end of the heat storage circulation pump (7) is connected to the second water inlet end of the heat collector heat exchanger (4); The second water outlet end of the heat storage tank (8) is connected to the water inlet end of the primary-side heating circulation pump (12); the heating thermostat (9) is arranged on the connecting pipe between the second water outlet end of the heat storage tank (8) and the primary-side heating circulation pump (12); the first water outlet end of the primary-side heating circulation pump (12) is connected to the indirect heating primary-side return water control valve (20); the indirect heating primary-side return water control valve (20) is connected to the first water inlet end of the indirect heating plate heat exchanger (19); the first water outlet end of the indirect heating plate heat exchanger (19) is connected to the indirect heating primary-side water outlet control valve (22); the indirect heating primary-side water outlet control valve (22) is connected to the second water inlet end of the heat storage tank (8); The second water outlet end of the indirect heating plate heat exchanger (19) is in communication with the indirect heating secondary side water outlet control valve (21), the indirect heating secondary side water outlet control valve (21) is in communication with the heating water supply pipeline, the second water inlet end of the indirect heating plate heat exchanger (19) is in communication with the indirect heating secondary side return water control valve (23), the indirect heating secondary side return water control valve (23) is in communication with the first water outlet end of the secondary side heating circulation pump (28), and the water inlet end of the secondary side heating circulation pump (28) is in communication with the heating return water pipeline; The water outlet end 2 of the primary side heat supply circulation pump (12) is connected to the water source heat pump heat supply evaporation side return water control valve (25), the water source heat pump heat supply evaporation side return water control valve (25) is connected to the water inlet end 1 of the evaporator (18), the water outlet end 1 of the evaporator (18) is connected to the water source heat pump heat supply evaporation side water outlet control valve (24), the water source heat pump heat supply evaporation side water outlet control valve (24) is connected to the connecting pipe between the indirect heating primary side water outlet control valve (22) and the hot water storage tank (8), the water outlet end 2 of the evaporator (18) is connected to the expansion valve (17), and the expansion valve (17) is connected to the water inlet end 1 of the condenser (16). The first water outlet end of the condenser (16) is connected to the compressor (15), the compressor (15) is connected to the second water inlet end of the evaporator (18), the second water outlet end of the condenser (16) is connected to the water outlet control valve (26) on the heating condensing side of the water source heat pump, the water outlet control valve (26) on the heating condensing side of the water source heat pump is connected to the connecting pipe between the indirect heating secondary side water outlet control valve (21) and the heating water supply pipe, the second water outlet end of the secondary side heating circulation pump (28) is connected to the water return control valve (27) on the heating condensing side of the water source heat pump, and the water return control valve (27) on the heating condensing side of the water source heat pump is connected to the second water inlet end of the condenser (16).

2. A solar energy inter-seasonal heat storage and heating system according to claim 1, characterized in that: The liquid replenishment and pressure stabilizing device (5) is connected to a connecting pipe between a water outlet end of the heat collector heat exchanger (4) and a water inlet end of the heat collector circulation pump (6), and the liquid replenishment and pressure stabilizing device (5) is connected to the ethylene glycol storage tank (10).

3. A solar energy inter-seasonal heat storage and heating system according to claim 2, characterized in that: The medium stored in the ethylene glycol storage tank (10) is ethylene glycol antifreeze liquid.

4. The solar energy inter-seasonal heat storage and heating system according to claim 1 is characterized in that: The water inlet end of the softening device (11) is connected to the tap water pipeline, the water outlet end 1 of the softening device (11) is connected to the water inlet end of the hot water tank replenishment pump (13), and the water outlet end of the hot water tank replenishment pump (13) is connected to the water inlet end 3 of the hot water tank (8).

5. The solar energy inter-seasonal heat storage and heating system according to claim 1 is characterized in that: The second water outlet end of the softening device (11) is connected to the water inlet end of the secondary side water supply pump (14), and the water outlet end of the secondary side water supply pump (14) is connected to the connecting pipe between the secondary side heating circulation pump (28) and the heating return water pipe.

6. The solar energy inter-seasonal heat storage and heating system according to claim 1 is characterized in that: The solar thermal collector (1) is a flat-plate thermal collector.

7. The solar energy inter-seasonal heat storage and heating system according to claim 1 is characterized in that: The heat storage tank (8) is a horizontal partitioned water storage tank.

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