Aquatic product culture water body thermal environment guarantee system

Abstract

The invention belongs to the field of aquatic product culture water body heat supply, and discloses an aquatic product culture water body thermal environment guarantee system. In the system, a constant-temperature shed and an air constant-temperature unit jointly form an air heat supplementing process system, and a water supplementing and heating mode is that after wastewater discharged from a breeding water tank enters a heat storage water tank through a self-flowing drainage pipeline, heat exchange is carried out on the wastewater and fresh water in a water storage device in a water-water heat exchange device; the fresh water with the increased temperature enters the water sunning pool through a pipeline and is heated in a solar direct irradiation mode or enters the large-temperature-difference heat pump system through a pipeline to be heated in a heat recovery mode; the heat storage greenhouse, the heat storage water pool, the water storage device, the water-water heat exchange device, the large-temperature-difference heat pump system, the water drying greenhouse and the water drying water pool jointly form a water supplementing and heating process system, the system heats the air temperature in the constant-temperature greenhouse to the water body temperature or the water body temperature is higher, and therefore the water body heat dissipation heat loss is reduced, and meanwhile the heat dissipation amount of the constant-temperature greenhouse to the greenhouse is recycled.

Description

Technical Field

[0001] The present invention belongs to the field of water body heating for aquatic product breeding, and relates to a thermal environment guarantee system for aquatic product breeding water body. Background Art

[0002] For the farming of aquatic products such as shrimp and fish, factory-based and large-scale farming is the development trend of the aquatic product farming industry.

[0003] In factory-scale, large-scale aquaculture, the aquaculture tanks need to be replaced with a certain proportion of fresh water every day. At the same time, users need to replenish the aquaculture tanks with fresh water of a certain temperature to ensure that the water quality meets the aquaculture needs. While wastewater is discharged during the water exchange process, a large amount of heat energy is also discharged. Furthermore, a certain amount of heat is consumed during the refilling and heating process. The utility model patent discloses a "heat recovery and constant temperature system for aquaculture" (patent application number 201520700442.7), which utilizes the temperature difference and flow rate relationship between the supply and discharge water in the aquaculture process to recover wastewater heat energy using a heat pump. The utility model patent discloses a "wastewater heat energy recovery system" (patent application number 201721318322.6), which utilizes a purification device and a heat exchange device to achieve wastewater heat energy recovery. The utility model patent "an energy-saving heat pump for aquaculture" (patent application number 201220602739.6) utilizes wastewater heat sources and air sources to recover wastewater heat energy and absorb air heat energy to heat the new water. The aforementioned patents only recycle waste heat from wastewater generated during aquaculture drainage. However, in horizontal aquaculture systems, in addition to heat loss from water changes, the lower overall temperature of the aquaculture water environment in winter leads to significant heat loss from convection between the water surface and the air, as well as evaporation. Calculations show that this heat loss accounts for 60% to 70%.

[0004] In response to the above problems, the present invention proposes a thermal environment protection system for aquaculture water bodies, which uses wastewater thermal energy and solar energy to achieve equal water replenishment heating, while creating a relatively high-temperature environment for the aquaculture water body, greatly reducing the convection heat loss between the aquaculture water body and the air and the evaporation heat loss of the aquaculture water body, realizing the overall recovery of drainage heat energy and water body heat loss, greatly reducing the system's operating energy consumption in winter, and greatly reducing the aquaculture cost of aquatic products while realizing year-round aquaculture of aquatic products, playing a role in expanding the scale of aquatic product output and improving the economic benefits of aquaculture. Summary of the Invention

[0005] The purpose of the present invention is to provide a thermal environment protection system for aquatic product breeding water, so as to solve the problems of large heat loss and high production cost of the existing thermal environment protection system for aquatic product breeding, and to provide a new technical solution for thermal environment protection of aquatic product breeding.

[0006] The technical solution of the present invention:

[0007] A thermal environment protection system for aquatic product breeding water body is characterized in that it is mainly composed of a breeding greenhouse, a constant temperature greenhouse, an air constant temperature unit, a heat storage greenhouse, a heat storage pool, a water storage device, a water-to-water heat exchange device, a large temperature difference heat pump system, a sun-drying greenhouse, a sun-drying pool, and a breeding water tank; the constant temperature greenhouse and the air constant temperature unit constitute an air heating system, and the heat storage greenhouse, the heat storage pool, the water storage device, the water-to-water heat exchange device, the large temperature difference heat pump system, the sun-drying greenhouse, and the sun-drying pool constitute a water heating system.

[0008] The breeding water tank is placed in a constant temperature shed, and is connected to the inlet of a heat storage tank through a gravity drainage pipeline. The heat storage tank is placed in the heat storage greenhouse; the outlet of the heat storage tank is connected to the wastewater side inlet of a water-water heat exchange device through a pipeline, and a water pump is provided on the pipeline. The wastewater side outlet of the water-water heat exchange device is connected to the low-temperature side inlet of a large temperature difference heat pump system through a fourth pipeline, and the drain pipe is connected to the low-temperature side outlet of the large temperature difference heat pump system;

[0009] The water storage device is connected to the clean water side inlet of the water-water heat exchange device through a pipeline, and the pipeline is provided with a water pump; the clean water side outlet of the water-water heat exchange device is connected to the water drying pool through the first branch of the pipeline, and the second branch of the pipeline is connected to the high temperature side inlet of the large temperature difference heat pump system, and the first branch pipeline and the second branch pipeline are respectively provided with switch valves; the water drying pool is placed in the water drying greenhouse, and the water drying pool is connected to the breeding water tank through a pipeline, and a water pump is provided on the pipeline, and the high temperature side outlet of the large temperature difference heat pump system is connected to the water pump outlet pipeline through a pipeline.

[0010] The constant temperature shed is placed on the inner side of the breeding greenhouse and the outer side of the breeding water tank.

[0011] The air constant temperature unit includes a fan heating coil, an outdoor unit and a refrigerant pipeline; the outdoor unit consists of a fin evaporator, a compressor and a throttling mechanism connected in sequence through the refrigerant pipeline, and the outdoor unit is installed on the outside of the constant temperature shed; the fan heating coil is placed on the inside of the constant temperature shed; the fan heating coil and the outdoor unit are connected through the refrigerant pipeline.

[0012] The large temperature difference heat pump system is composed of multiple water source heat pump units connected in series, and the water flow direction on the wastewater side is opposite to the water flow direction on the clean water side.

[0013] The shape of the constant temperature shed can be an arch shed, a square or other shapes.

[0014] The water storage device can be a water storage shaft, a water storage tank or other devices.

[0015] The thermal insulation film materials of the breeding greenhouse and constant temperature greenhouse can be polyethylene PE, polyvinyl chloride PVC, ethylene-vinyl acetate copolymer EVA, PO film, etc.

[0016] The thermal insulation blanket material of the breeding greenhouse can be wool felt, space cotton, straw curtain, rock wool, foam, etc.

[0017] The heat dissipated from the constant temperature shed to the breeding shed is recovered by the air constant temperature unit and released back into the constant temperature shed, gradually making the air temperature in the constant temperature shed equal to or even higher than the water temperature.

[0018] The water in the aquaculture tanks needs to be drained by 10-30% daily, and replenished with fresh water of the same volume and temperature as the drained water to meet the water quality requirements for aquaculture. The replenished water is heated by routing wastewater from the aquaculture tanks through gravity drainage pipes into a heat storage tank. There, it exchanges heat with fresh water from the storage tank in a water-to-water heat exchanger. The heated fresh water then flows through pipes into a sun-drying tank, where it is heated by direct solar radiation or by heat recovery from a large temperature difference heat pump system.

[0019] Beneficial effects of the present invention:

[0020] The water replenishment heating method of the present invention ensures the water quality and water quantity of the aquaculture environment in the aquaculture tank while stabilizing the temperature of the aquaculture water body at the required temperature, greatly reducing the energy consumption of the traditional single-electric heating replenishment method and lowering the electricity cost.

[0021] The air heating method of the present invention provides a stable high-temperature aquaculture environment for the aquaculture water body, reduces the evaporation heat loss of the water body in the aquaculture tank, and realizes the recovery of air heat loss.

[0022] The thermal environment guarantee system for aquatic product breeding of the present invention is simple, has good economic benefits and feasibility, can greatly reduce the cost of aquatic product breeding, increase the breeding cycle, and improve the economic benefits of aquatic product breeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the thermal environment protection system for aquatic product breeding water provided by an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the air heating process based on the thermal environment protection system for aquatic product breeding water provided by an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of a large temperature difference heat pump system based on the thermal environment protection system for aquatic product breeding water provided by an embodiment of the present invention.

[0026] In the figure: 1 breeding greenhouse, 2 constant temperature greenhouse, 3 air constant temperature unit, 4 heat storage greenhouse, 5 heat storage tank, 6 water storage device, 7 water-water heat exchange device, 8 large temperature difference heat pump system, 9 sun drying greenhouse, 10 sun drying tank, 11 breeding water tank, 12 first water pump, 13 second water pump, 14 third water pump, 15 first switch valve, 16 first switch valve, 17 gravity drainage pipeline, 18 first pipeline, 19 second pipeline, 20 third pipeline, 21 first branch, 22 second branch, 2 3 fourth pipeline, 24 fifth pipeline, 25 drain pipe, 26 sixth pipeline; 3-1 fan heating coil, 3-2 outdoor unit, 3-3 refrigerant pipeline, 3-2-1 finned evaporator, 3-2-2 compressor, 3-2-3 throttling mechanism, 8-1-1 first pump body, 8-1-2 first evaporator, 8-1-3 first condenser, 8-1-4 first valve, 8-2-1 second pump, 8-2-2 second evaporator, 8-2-3 second condenser, 8-2-4 second valve. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0028] A thermal environment protection system for aquatic product aquaculture water bodies is primarily composed of an aquaculture greenhouse 1, a constant temperature greenhouse 2, an air constant temperature unit 3, a thermal storage greenhouse 4, a hot water storage tank 5, a water storage device 6, a water-to-water heat exchange device 7, a large temperature difference heat pump system 8, a sun-drying greenhouse 9, a sun-drying tank 10, and an aquaculture water tank 11. The constant temperature greenhouse 2 and the air constant temperature unit 3 constitute the air supplementary heating system, while the thermal storage greenhouse 4, the hot water storage tank 5, the water storage device 6, the water-to-water heat exchange device 7, the large temperature difference heat pump system 8, the sun-drying greenhouse 9, and the sun-drying tank 10 constitute the water supplementary heating system.

[0029] The breeding water tank 11 is connected to the heat storage tank 5 through a gravity drainage pipeline 17. The heat storage tank 5 is placed in the heat storage greenhouse 4. The heat storage tank 5 is connected to the wastewater side inlet of the water-water heat exchange device 7 through a first pipeline 18. The first pipeline 18 is provided with a first water pump 12. The wastewater side outlet of the water-water heat exchange device 7 is connected to the low-temperature side inlet of the large temperature difference heat pump system 8 through a fourth pipeline 23, and the drain pipe 25 is connected to the low-temperature side outlet of the large temperature difference heat pump system 8.

[0030] The water storage device 6 is connected to the clean water side inlet of the water-water heat exchange device 7 through the second pipeline 19, and the second pipeline 19 is provided with a second water pump 13. The clean water side outlet of the water-water heat exchange device 7 is connected to the water drying pool 10 through the first branch pipeline 21 of the third pipeline 20, and the second branch pipeline 22 of the third pipeline 20 is connected to the high temperature side inlet of the large temperature difference heat pump system 8. The first branch pipeline 21 and the second branch pipeline 22 are respectively provided with a first switch valve 15 and a second switch valve 16. The water drying pool 10 is placed in the water drying greenhouse 9. The water drying pool 10 is connected to the breeding tank 11 through the fifth pipeline 24, and the fifth pipeline 24 is provided with a third water pump 14. The high temperature side outlet of the large temperature difference heat pump system 8 is connected to the fifth pipeline 24 through the sixth pipeline 26.

[0031] The constant temperature shed 2 is placed on the inner side of the breeding greenhouse 1 and the outer side of the breeding water tank 11.

[0032] The air thermostat unit 3 includes a fan heating coil 3-1, an outdoor unit 3-2, and a refrigerant pipeline 3-3. The outdoor unit 3-2 includes a finned evaporator 3-2-1, a compressor 3-2-2, and a throttling mechanism 3-2-3. The outdoor unit 3-2 is installed outside the constant temperature shed 2, and the fan heating coil 3-1 is placed inside the constant temperature shed 2.

[0033] The large temperature difference heat pump system 8 is composed of multiple water source heat pump units connected in series, and the water flow direction on the wastewater side is opposite to the water flow direction on the clean water side.

[0034] The shape of the constant temperature shed 2 can be an arch shed, a square or other shapes.

[0035] The water storage device 6 can be a water storage shaft, a water storage tank or other devices.

[0036] The thermal insulation film materials of the breeding greenhouse 1 and the constant temperature greenhouse 2 can be polyethylene PE, polyvinyl chloride PVC, ethylene-vinyl acetate copolymer EVA, PO film, etc.

[0037] The thermal insulation material of the breeding greenhouse 1 can be wool felt, space cotton, straw curtain, rock wool, foam, etc.

[0038] The heat dissipated by the constant temperature shed 2 to the breeding greenhouse 1 is recovered by the air constant temperature unit 3 and released back into the constant temperature shed 2, gradually making the air temperature in the constant temperature shed 2 equal to or even higher than the water temperature, providing a stable high-temperature breeding environment for the breeding water body, and realizing air heat loss recovery while reducing the evaporation heat loss of the water body in the breeding tank 11.

[0039] The water in the aquaculture tank 11 needs to discharge 10 to 30% of its water volume every day, and at the same time, it needs to be supplemented with fresh water that is consistent with the drainage volume and temperature to meet the water quality requirements of the aquaculture water body. The heating method of water replenishment is: after the wastewater discharged from the aquaculture tank 11 enters the heat storage tank 5 through the gravity drainage pipe 17, it exchanges heat with the fresh water in the water storage device 6 in the water-water heat exchange device 7. The fresh water with increased temperature enters the sun-drying pool 10 through the first branch pipe 21 of the third pipe 20 and is heated by direct solar irradiation or enters the large temperature difference heat pump system 8 through the second branch pipe 22 of the third pipe 20 for heat recovery. The specific operation method is as follows:

[0040] When the weather is clear, close the second switch valve 16 and open the first switch valve 15. The fresh water heated by the water-to-water heat exchange device 7 enters the sun-drying pool 10. Under the heat preservation effect of the sun-drying greenhouse 9, the water in the sun-drying pool 10 is heated to the temperature required for the aquaculture water body by direct solar energy exposure. When the weather is cold, close the second switch valve 15 and open the first switch valve 16. Use the large temperature difference heat pump system 8 to further recover the heat of the wastewater after passing through the water-to-water heat exchange device 7, and at the same time heat the fresh water to the temperature required for the aquaculture water body.

[0041] The large temperature difference heat pump system 8 described in this system takes two water source heat pump units as an example. Figure 3 As shown, two water-source heat pump units are connected in series. Water flowing from the fourth pipeline 23 at a temperature of approximately 18°C ​​sequentially passes through the first evaporator 8-1-2 and the second evaporator 8-2-2. After passing through the first evaporator 8-1-2, the temperature drops to approximately 11°C. After passing through the second evaporator 8-2-2, the temperature drops to approximately 5°C. The wastewater is then discharged through the drain pipe 25. Water flowing from the second branch pipeline 22 of the third pipeline 20 at a temperature of approximately 13°C sequentially passes through the second condenser 8-2-3 and the first condenser 8-1-3. After passing through the second condenser 8-2-3, the temperature rises to approximately 19°C. After passing through the first evaporator 8-1-3, the temperature rises to 26°C before entering the aquaculture tank 11.

[0042] The above embodiments are only for illustrating the technical concept and features of the present invention and cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A thermal environment protection system for aquatic product breeding water, characterized in that: The aquatic product aquaculture water body thermal environment protection system mainly comprises an aquaculture greenhouse (1), a constant temperature greenhouse (2), an air constant temperature unit (3), a heat storage greenhouse (4), a heat storage tank (5), a water storage device (6), a water-water heat exchange device (7), a large temperature difference heat pump system (8), a water drying greenhouse (9), a water drying tank (10), and an aquaculture water tank (11); the constant temperature greenhouse (2) and the air constant temperature unit (3) constitute an air heating system, and the heat storage greenhouse (4), the heat storage tank (5), the water storage device (6), the water-water heat exchange device (7), the large temperature difference heat pump system (8), the water drying greenhouse (9), and the water drying tank (10) constitute a water heating system; The breeding water tank (11) is placed in a constant temperature shed (2) and is connected to the inlet of a heat storage tank (5) through a gravity drainage pipeline (17). The heat storage tank (5) is placed in a heat storage shed (4); the outlet of the heat storage tank (5) is connected to the wastewater side inlet of a water-water heat exchange device (7) through a first pipeline (18). A first pumping pump (12) is provided on the first pipeline (18). The wastewater side outlet of the water-water heat exchange device (7) is connected to the low temperature side inlet of a large temperature difference heat pump system (8) through a fourth pipeline (23). The drainage pipe (25) is connected to the low temperature side outlet of the large temperature difference heat pump system (8); The water storage device (6) is connected to the clean water side inlet of the water-water heat exchange device (7) through a second pipeline (19), and the second pipeline (19) is provided with a second pump (13); the clean water side outlet of the water-water heat exchange device (7) is connected to the sun-drying pool (10) through a first branch pipeline (21) of a third pipeline (20), and the second branch pipeline (22) of the third pipeline (20) is connected to the high temperature side inlet of the large temperature difference heat pump system (8), and the first branch pipeline (21) and the second branch pipeline (22) are respectively provided with switch valves; the sun-drying pool (10) is placed in the sun-drying greenhouse (9), and the sun-drying pool (10) is connected to the breeding water tank (11) through a fifth pipeline (24), and the fifth pipeline (24) is provided with a third pump (14), and the high temperature side outlet of the large temperature difference heat pump system (8) is connected to the fifth pipeline (24) through a sixth pipeline (26).

2. The thermal environment protection system for aquatic product breeding water according to claim 1 is characterized in that: The constant temperature shed (2) is placed on the inner side of the breeding greenhouse (1) and on the outer side of the breeding water tank (11).

3. The thermal environment protection system for aquatic product breeding water according to claim 1 is characterized in that: The air thermostatic unit (3) comprises a fan heating coil (3-1), an outdoor unit (3-2) and a refrigerant pipeline (3-3); the outdoor unit (3-2) comprises a finned evaporator (3-2-1), a compressor (3-2-2) and a throttling mechanism (3-2-3) which are connected in sequence through the refrigerant pipeline (3-3); the outdoor unit (3-2) is installed on the outside of the thermostatic shed (2); the fan heating coil (3-1) is placed on the inside of the thermostatic shed (2); the fan heating coil (3-1) and the outdoor unit (3-2) are connected through the refrigerant pipeline (3-3).

4. The thermal environment protection system for aquatic product breeding water according to claim 1 is characterized in that: The large temperature difference heat pump system (8) is composed of a plurality of water source heat pump units connected in series, wherein the water flow direction on the wastewater side is opposite to that on the clean water side; the water source heat pump unit comprises a pump body, an evaporator, a valve and a condenser connected in a closed loop.

5. The thermal environment protection system for aquatic product breeding water according to claim 1 is characterized in that: The shape of the constant temperature shed (2) includes but is not limited to an arch shed shape or a square shape.

6. The thermal environment protection system for aquatic product breeding water according to claim 1 is characterized in that: The water storage device (6) includes but is not limited to a water storage well or a water storage tank.

7. The thermal environment protection system for aquatic product breeding water according to claim 1, characterized in that: The thermal insulation film materials of the breeding greenhouse (1) and the constant temperature greenhouse (2) are polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, and PO film.

8. The thermal environment protection system for aquatic product breeding water according to claim 1, characterized in that: The thermal insulation blanket material of the breeding greenhouse (1) is wool felt, space cotton, straw curtain, rock wool, and foam.

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