Aquaculture system

Abstract

The present invention discloses an aquaculture system, which includes a first cold source pool, a sewage pool, a separation tower, a cultivation pool and a refrigeration module, wherein the water inlet of the first cold source pool is used to communicate with the low-temperature water outlet of the reservoir, and the outlet of the first cold source pool is used to communicate with the river; the first cold source pool cooperates with the sewage pool for heat exchange, the refrigeration module and the first cold source pool are used to cool the aquaculture sewage in the sewage pool to form ice slurry, and the water inlet of the sewage pool is used to communicate with the sewage outlet of the cultivation pool; the separation tower is provided with an ice slurry inlet, a concentrated liquid discharge port and an ice crystal discharge port, the ice slurry inlet is connected with the outlet of the sewage pool to receive the ice slurry discharged from the sewage pool, the ice crystal discharge port is higher than the concentrated liquid discharge port, and the ice crystal discharge port is used to discharge ice crystals separated from the ice slurry; the concentrated liquid discharge port is used to discharge the concentrated liquid separated from the ice slurry. The above scheme can achieve low energy consumption for the treatment of aquaculture sewage.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture system design, and in particular to an aquaculture system. Background Art

[0002] As people's needs increase, more and more aquaculture systems are built near rivers to make full use of the nearby water systems. However, aquaculture systems will produce a large amount of aquaculture wastewater, and the random discharge of these aquaculture wastewater will pollute the environment. At present, in order to solve the problem of aquaculture wastewater discharge polluting the river environment, the aquaculture wastewater system is equipped with a circulating water system, which treats the aquaculture wastewater generated by aquaculture through sedimentation, filtration, disinfection, oxygenation and other processes, so that the water in the aquaculture wastewater can be recycled. At the same time, the dirt in the aquaculture wastewater is separated and centrally treated.

[0003] The current circulating water system has a low concentration of pollutants in the effluent, and the feasibility of using biological treatment technology is poor. Currently, filtration and disinfection processes are mostly used for treatment. The insufficient treatment depth leads to a daily water exchange rate of 10%-20%, which has the problems of high energy consumption and large water resource consumption. For cold-water fish, the aquarium breeding system needs to be equipped with a temperature control system or a cooling pool, which has high costs and energy consumption.

[0004] After a river is dammed to form a reservoir, the water in the reservoir shows vertical temperature stratification. If the low-temperature water released from the reservoir is discharged directly, it will affect the agricultural production, fish resources and water ecological environment downstream. In related technologies, stratified water intake is usually used to achieve reservoir water release, but this requires adjusting the reservoir's release mode, which has the problems of complex control and high investment costs. Summary of the invention

[0005] In view of the problems existing in the existing methods of treating aquaculture wastewater, the purpose of the present invention is to provide an aquaculture system, which can treat aquaculture wastewater with lower water consumption and lower energy consumption, while mitigating the impact of low-temperature water in the reservoir on the downstream ecological environment.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An aquaculture system includes a first cold source pool, a sewage pool, a separation tower, a culture pool and a refrigeration module, wherein:

[0008] The water inlet of the first cold source pool is used to communicate with the low-temperature water outlet of the reservoir, and the outlet of the first cold source pool is used to communicate with the river;

[0009] The first cold source pool cooperates with the sewage pool for heat exchange, the refrigeration module and the first cold source pool are used to cool the aquaculture sewage in the sewage pool to form ice slurry, and the water inlet of the sewage pool is used to communicate with the sewage outlet of the aquaculture pool;

[0010] The separation tower is provided with an ice slurry inlet, a concentrated liquid discharge port and an ice crystal discharge port. The ice slurry inlet is connected to the drain port of the sewage pool to receive the ice slurry discharged from the sewage pool. The ice crystal discharge port is higher than the concentrated liquid discharge port. The ice crystal discharge port is used to discharge ice crystals separated from the ice slurry; the concentrated liquid discharge port is used to discharge the concentrated liquid separated from the ice slurry.

[0011] Furthermore, it also includes a second cold source pool, which cooperates with the sewage pool for heat exchange to cool the aquaculture sewage in the sewage pool, and the water inlet of the second cold source pool is connected to the ice crystal discharge port; the water outlet of the second cold source pool is connected to the clean water inlet of the aquaculture pool.

[0012] Furthermore, the first cold source pool, the second cold source pool and the sewage pool are arranged in sequence, and the first cold source pool is used to cool the aquaculture sewage in the sewage pool through the second cold source pool.

[0013] Further, the refrigeration module includes a first electric refrigeration module and a second electric refrigeration module, the first electric refrigeration module is connected between the first cold source pool and the second cold source pool, and the second electric refrigeration module is connected between the second cold source pool and the sewage pool;

[0014] The heat release end of the first electric refrigeration module is in contact with the first cold source pool; the heat absorption end of the first electric refrigeration module is in contact with the second cold source pool;

[0015] The heat release end of the second electric refrigeration module contacts the second cold source pool; the heat absorption end of the second electric refrigeration module contacts the sewage pool.

[0016] Furthermore, the reservoir is provided with a hydroelectric power generation module, and the hydroelectric power generation module is electrically connected to the first electric refrigeration module and the second electric refrigeration module respectively.

[0017] Furthermore, the reservoir is provided with a hydroelectric power generation module, and the tail water outlet of the hydroelectric power generation module is connected to the water inlet of the first cold source pool.

[0018] Furthermore, a filtration space is provided in the separation tower; the ice slurry inlet is higher than the concentrated liquid discharge port, the filtration space is located between the ice slurry inlet and the concentrated liquid discharge port, and the ice crystal discharge port is connected to the filtration space.

[0019] Furthermore, the separation tower includes a tower body and a lifting device disposed in the tower body. The lifting device is disposed in the tower body in a liftable manner and is used to lift the ice crystals to the ice crystal discharge port.

[0020] Furthermore, the separation tower further comprises a cleaning nozzle, which is higher than the ice crystal discharge port. When the ice crystals are separated from the concentrated liquid, the cleaning nozzle is used to spray cleaning water onto the ice crystals.

[0021] Furthermore, the cleaning nozzle is communicated with the low-temperature water outlet.

[0022] Furthermore, a first electrically controlled valve is provided at the drain outlet of the first cold source pool, a first temperature control device is provided in the first cold source pool, the first temperature control device is connected to the first electrically controlled valve, and when the water temperature in the first cold source pool is greater than a first preset threshold, the first electrically controlled valve is controlled to open.

[0023] The aquaculture system provided by the present invention has the following beneficial effects:

[0024] The aquaculture system disclosed in the embodiment of the present invention introduces the low-temperature water discharged from the reservoir into the first cold source pool, thereby cooling the aquaculture sewage in the sewage pool with the help of the low-temperature water from the reservoir with a lower temperature, and under the synergistic effect of the refrigeration module, the liquid aquaculture sewage can be converted into ice slurry, and then the ice slurry is input into the separation tower, so as to separate the ice slurry into ice crystals and concentrated liquid. The ice crystals are formed by the freezing of water in the aquaculture sewage. The ice crystal discharge port separates the ice crystals for subsequent secondary utilization. The pollutants in the aquaculture sewage will remain in the concentrated liquid and be discharged from the separation tower along with the concentrated liquid from the concentrated liquid discharge port. This process realizes the physical separation of the aquaculture sewage, so that the water in the aquaculture sewage can be recycled and the pollutants in the aquaculture sewage can be further concentrated and separated.

[0025] From the above process, it can be seen that the aquaculture system disclosed in the embodiment of the present application can make full use of the low-temperature characteristics of the low-temperature water in the reservoir, thereby being able to treat aquaculture wastewater and avoid excessive energy consumption in the refrigeration module, thereby reducing energy consumption in the aquaculture wastewater process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] Figure 1 A schematic diagram of an aquaculture system disclosed in an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the separation tower.

[0029] Description of reference numerals:

[0030] 10-first cold source pool, 11-first stirring device,

[0031] 20- sewage tank, 21- second stirring device,

[0032] 30-separation tower, 31-ice slurry inlet, 32-concentrate discharge port, 33-ice crystal discharge port, 301-tower body, 302-lifting device, 303-cleaning nozzle,

[0033] 40-reservoir, 41-low temperature water outlet,

[0034] 51-sewage pipe, 52-water pipe,

[0035] 60-second cold source pool, 61-third stirring device,

[0036] 70-first electric refrigeration module, 80-second electric refrigeration module,

[0037] 90-Hydroelectricity module, 100-Aquaculture pond. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Please refer to Figure 1 and Figure 2 The embodiment of the present application discloses an aquaculture system, which includes a first cold source pool 10, a sewage pool 20, a separation tower 30, a culture pool 100 and a refrigeration module.

[0040] The first cold source pool 10 plays a cooling role, and the water inlet of the first cold source pool 10 is used to communicate with the low-temperature water outlet 41 of the reservoir 40. The low-temperature water of the reservoir 40 enters the first cold source pool 10 through the low-temperature water outlet 41 and the water inlet of the first cold source pool 10 for standby. Since the low-temperature water of the reservoir has a low temperature, after entering the first cold source pool 10, the first cold source pool 10 has a cooling effect. After completing the cooling work, the low-temperature water of the reservoir can be discharged through the drain of the first cold source pool 10. Specifically, the drain of the first cold source pool 10 can be connected to the river, and the low-temperature water of the reservoir in the first cold source pool 10 can be discharged into the river after the cooling function is completed. The drain of the first cold source pool 10 can be provided with a switch valve to control the drainage work of the first cold source pool 10.

[0041] The first cold source pool 10 cooperates with the sewage pool 20 in heat exchange to cool the aquaculture sewage in the sewage pool 20. The refrigeration module is used for refrigeration. The refrigeration module and the first cold source pool 10 play a synergistic role, which can make the aquaculture sewage form ice slurry. The water inlet of the sewage pool 20 is used to communicate with the sewage outlet of the aquaculture pool 100. Specifically, the water inlet of the sewage pool 20 can be connected to the sewage outlet of the aquaculture pool 100 through a sewage pipe 51. The aquaculture sewage generated by the aquaculture pool 100 will enter the sewage pipe 51, and finally enter the sewage pool 20 through the sewage pipe 51 to be processed. In the embodiment of the present application, the refrigeration module is an electric refrigeration module.

[0042] The separation tower 30 is provided with an ice slurry inlet 31, a concentrate discharge port 32 and an ice crystal discharge port 33. The ice slurry inlet 31 is connected to the drain port of the sewage pool 20 to receive the ice slurry discharged from the sewage pool 20. As described above, the aquaculture sewage in the sewage pool 20 will form ice slurry (essentially a mixture of liquid and ice crystals) after being cooled, and the ice slurry will be discharged from the drain port of the sewage pool 20 and enter the separation tower 30 through the ice slurry inlet 31.

[0043] The ice crystal discharge port 33 is used to discharge the ice crystals separated from the ice slurry. Specifically, the ice crystals can be directly discharged into the aquaculture pond 100, or the clean water after the ice crystals melt is input into the aquaculture pond 100. The concentrated liquid discharge port 32 is used to discharge the concentrated liquid separated from the ice slurry. After the ice slurry is formed, the ice crystals will be suspended due to their low density, which actually realizes the extraction of part of the water from the aquaculture sewage.

[0044] In the embodiment of the present application, the ice crystal discharge port 33 is higher than the concentrated liquid discharge port 32. When the ice crystals reach the ice crystal discharge port 33, the ice crystals can be separated from the concentrated liquid, and the separated ice crystals are discharged through the ice crystal discharge port 33 to achieve water recovery in the aquaculture wastewater. The remaining concentrated liquid can be discharged through the concentrated liquid discharge port 32. Specifically, the concentrated liquid can be discharged into a special transport vehicle through the concentrated liquid discharge port 32 to be transported to the next process environment for harmless treatment. The concentrated liquid can also be directly subjected to terminal treatments such as freeze-dried crystallization, evaporative crystallization or drying treatment.

[0045] The aquaculture system disclosed in the embodiment of the present application introduces the low-temperature water discharged from the reservoir into the first cold source pool 10, thereby cooling the aquaculture sewage in the sewage pool 20 with the help of the low-temperature water from the reservoir with a relatively low temperature, and under the coordinated action of the refrigeration module, the liquid aquaculture sewage can be transformed into ice slurry, and then the ice slurry is input into the separation tower 30, so that the ice slurry is separated into ice crystals and concentrated liquid. The ice crystals are formed by the freezing of water in the aquaculture sewage. The ice crystal discharge port 33 separates the ice crystals for subsequent secondary utilization. The pollutants in the aquaculture sewage will remain in the concentrated liquid and be discharged from the separation tower 30 along with the concentrated liquid from the concentrated liquid discharge port 32. This process realizes the physical separation of the aquaculture sewage, so that the water in the aquaculture sewage can be recycled and the pollutants in the aquaculture sewage can be further concentrated and separated.

[0046] From the above process, it can be seen that the aquaculture system disclosed in the embodiment of the present application can make full use of the low-temperature characteristics of the low-temperature water in the reservoir, thereby being able to treat aquaculture wastewater and avoid excessive energy consumption in the refrigeration module, thereby reducing energy consumption in the aquaculture wastewater process.

[0047] It needs to be explained that after the river is dammed to form a reservoir, the water in the reservoir shows a vertical water temperature stratification phenomenon, and the temperature of the upper water in the reservoir is higher than the temperature of the lower water in the reservoir. The water at the bottom of the reservoir has the lowest temperature. The water discharged from the reservoir is the lower water of the reservoir or the water at the bottom of the reservoir, so the temperature of the water discharged from the reservoir is much lower than the temperature of the water in the natural river. In this article, reservoir low-temperature water refers to water with a lower temperature discharged from the reservoir, for example, water in the reservoir that is below a preset height (e.g., 5 meters, 10 meters) above the water surface.

[0048] Since the temperature of the water released from the reservoir is much lower than that of the water in the natural river channel, if the water released from the reservoir is directly discharged, it will affect the agricultural production, fish resources and water ecological environment downstream. In the related technology, the stratified water intake method is usually adopted to realize the release of water from the reservoir. For example, when the reservoir releases water, a part of the upper layer water is discharged while a part of the lower layer water is also discharged, so that the two are mixed so that the temperature of the water released from the reservoir is not too low, thereby reducing the adverse effects on the downstream. Obviously, this release mode that requires adjusting the reservoir has the problems of complex control and high investment cost.

[0049] The aquaculture system disclosed in the embodiment of the present application can directly discharge the reservoir low-temperature water, and increase the temperature of the reservoir low-temperature water through heat exchange between the reservoir low-temperature water and aquaculture sewage, so that it can be discharged to the downstream of the reservoir after heat exchange with the aquaculture sewage, thereby alleviating the adverse effects on downstream agricultural production, fish resources and aquatic ecological environment. It can be seen that the aquaculture system disclosed in the embodiment of the present application not only realizes low-energy consumption treatment of aquaculture sewage, but also solves the problem of adverse effects caused by the discharge of reservoir low-temperature water, achieving multiple goals at one stroke, and having relatively significant actual economic benefits.

[0050] The aquaculture system disclosed in the embodiment of the present application essentially adopts the design concept of freeze concentration, based on the solid-liquid equilibrium principle of freeze separation, and cools the aquaculture sewage to below the freezing point of water in a low temperature environment. The freezing point of the solute in the aquaculture sewage is much lower than the freezing point of water. The physical property is used to make the water in the aquaculture sewage precipitate in the solid phase first, freeze into ice crystals, and then exclude the pollutants and impurities. Finally, the relatively pure ice crystals in the solid phase and the concentrated liquid containing pollutants and impurities in the liquid phase are separated by the separation tower 30. The concentrated liquid can be concentrated at the end for processing, and the ice crystals can be used as a cold source to achieve secondary utilization or recycling to meet the requirements of low emissions.

[0051] The aquarium breeding system disclosed in the embodiment of the present application may also include a second cold source pool 60, and the second cold source pool 60 cooperates with the sewage pool 20 for heat exchange, so as to cool the aquaculture sewage in the sewage pool 20. The water inlet of the second cold source pool 60 is connected with the ice crystal discharge port 33, and the ice crystals discharged from the ice crystal discharge port 33 will enter the second cold source pool 60, so that the temperature of the second cold source pool 60 is relatively low, so that the sewage pool 20 can be heat exchanged, so as to achieve the purpose of further cooling the sewage pool 20, and it is easier to make the aquaculture sewage in the sewage pool 20 become ice slurry. This preferred solution can not only make full use of the processed product ice crystals, but also further improve the cooling efficiency of the aquaculture sewage, so as to achieve the purpose of killing two birds with one stone. Specifically, the drain outlet of the second cold source pool 60 is connected with the clean water inlet of the breeding pool 100, so that the clean water with a higher temperature formed after the ice crystal heat exchange can be discharged into the breeding pool 100, so as to achieve the purpose of replenishing clean water in the breeding pool 100. Specifically, the drain outlet of the second cold source pool 60 can be connected to the clean water inlet of the breeding pool 100 through the clean water pipeline 52.

[0052] In the embodiment of the present application, the first cold source pool 10 can directly exchange heat with the sewage pool 20, or it can exchange heat indirectly. Similarly, the second cold source pool 60 can directly exchange heat with the sewage pool 20, or it can exchange heat indirectly. In an optional scheme, the first cold source pool 10, the second cold source pool 60 and the sewage pool 20 can be arranged in sequence. The first cold source pool 10 is used to cool the aquaculture sewage in the sewage pool 20 through the second cold source pool 60. This method is equivalent to the first cold source pool 20 indirectly cooling the sewage pool 20 through the second cold source pool 60, and the second cold source pool 60 directly cooling the sewage pool 20. Of course, in this case, while the ice crystals in the second cold source pool 60 are heat exchanged to become water to cool the sewage pool 20, the water formed by the ice crystals in the second cold source pool 60 after heat exchange will further receive the coldness of the low-temperature water of the reservoir in the first cold source pool 10, thereby further cooling the aquaculture sewage in the sewage pool 20.

[0053] Preferably, the first cold source pool 10, the second cold source pool 60 and the sewage pool 20 can be arranged on one side of the river along the water flow direction of the river. This method is conducive to the discharge of water with increased temperature after heat exchange in the first cold source pool 10 and the second cold source pool 60 into the river.

[0054] In the aquaculture system disclosed in the embodiment of the present application, there may be many types of refrigeration modules, for example, the refrigeration module may be an ice maker. Of course, the refrigeration module may also be of other types. In an optional scheme, the refrigeration module may include a first electric refrigeration module 70, which is connected between the first cold source pool 10 and the second cold source pool 60, the heat release end of the first electric refrigeration module 70 is in contact with the first cold source pool 10, and the heat absorption end of the first electric refrigeration module 70 is in contact with the second cold source pool 60. When the first electric refrigeration module 70 is working, the heat absorption end of the first electric refrigeration module 70 absorbs the heat in the second cold source pool 60, thereby cooling the second cold source pool 60, and finally reducing the temperature in the second cold source pool 60. The heat release end of the first electric refrigeration module 70 releases the heat absorbed by the heat absorption end of the first electric refrigeration module 70 into the first cold source pool 10, thereby realizing heating of the first cold source pool 10, and in this process, the cold in the first cold source pool 10 is transported to the second cold source pool 60 in a disguised manner. This structure can improve the cooling efficiency of the first cold source pool 10 on the second cold source pool 60 through the first electric refrigeration module 70 .

[0055] Similarly, in the aquarium breeding system disclosed in the embodiment of the present application, the refrigeration module may further include a second electric refrigeration module 80, which is connected between the second cold source pool 60 and the sewage pool 20. Specifically, the heat release end of the second electric refrigeration module 80 is in contact with the second cold source pool 60, and the heat absorption end of the second electric refrigeration module 80 is in contact with the sewage pool 20. The heat release end of the second electric refrigeration module 80 releases the heat absorbed by the heat absorption end of the second electric refrigeration module 80 into the second cold source pool 60, thereby heating the second cold source pool 60. In this process, the cold in the second cold source pool 60 is transported to the sewage pool 20 in a disguised manner. This structure can improve the cooling efficiency of the second cold source pool 60 on the sewage pool 20 through the second electric refrigeration module 80.

[0056] Specifically, the first electric refrigeration module 70 and the second electric refrigeration module 80 may be semiconductor refrigeration mechanisms, and the embodiment of the present application does not limit the specific types of the first electric refrigeration module 70 and the second electric refrigeration module 80 .

[0057] In the embodiment of the present application, the reservoir 40 may be provided with a hydroelectric power generation module 90, and the hydroelectric power generation module 90 may be electrically connected to the first electric refrigeration module 70 and the second electric refrigeration module 80, respectively, so as to supply power to the first electric refrigeration module 70 and the second electric refrigeration module 80. This solution can fully utilize the electric energy generated by the low-temperature water discharged from the reservoir to supply power to the first electric refrigeration module 70 and the second electric refrigeration module 80, without consuming additional electric energy in the power grid, and can still better meet the purpose of low energy consumption.

[0058] Furthermore, the reservoir 40 is provided with a hydroelectric module 90, and the tailwater outlet of the hydroelectric module 90 is connected to the water inlet of the first cold source pool 10. This structure enables the low-temperature water discharged from the reservoir to generate electricity through the hydroelectric module 90, and then be discharged into the first cold source pool 10 for subsequent aquaculture sewage treatment. Obviously, this structure can make more full use of the low-temperature water in the reservoir, improve its utilization rate, and achieve the purpose of multiple uses. This can further improve economic benefits. It should be explained that the tailwater outlet refers to the drain outlet of the hydroelectric module 90. The low-temperature water in the reservoir will drive the hydroelectric module 90 to generate electricity after passing through the hydroelectric module 90, and finally be discharged through the drain outlet of the hydroelectric module 90.

[0059] As described above, the separation tower 30 is used to separate ice crystals from concentrated liquid. In one embodiment, a filtering space may be provided in the separation tower 30, the ice slurry inlet 31 is higher than the concentrated liquid discharge port 33, the ice slurry inlet 31 is higher than the concentrated liquid discharge port 33, the filtering space is located between the ice slurry inlet 31 and the concentrated liquid discharge port 33, and the ice crystal discharge port 33 is connected to the filtering space. In the specific working process, the ice slurry in the sewage pool 20 enters the ice slurry inlet 31 and is transported to the separation tower 30. The ice slurry entering the separation tower 30 falls into the filtering space. Under the filtering action of the filtering space, the concentrated liquid continues to fall through the filtering space, while the ice crystals in the ice slurry remain in the filtering space, and finally the ice crystals are separated from the concentrated liquid. The ice crystals remaining in the filtering space will be discharged through the ice crystal discharge port 33 for secondary use. This method can separate ice crystals from concentrated liquid when the ice slurry enters the separation tower 30 and falls, without the need to set a lifting device in the separation tower 30. Of course, the sewage pool 20 and the separation tower 30 can be built according to the terrain, so that the sewage pool 20 is higher than the separation tower 30, so that the ice slurry can flow into the separation tower 30 under the action of gravity. Of course, a driving mechanism can also be set at the drain port of the sewage pool 20, and the driving mechanism drives the ice slurry to flow, so that the ice slurry flows into the separation tower 30.

[0060] In an optional solution, the driving mechanism may be a gear pump, which is arranged at the drain outlet of the sewage pool 20 or at the ice slurry inlet 31, and the gear pump can drive the ice slurry to flow into the separation tower 30. The gear pump drives the fluid through mutually meshing gears, and the gear pump is used to drive the ice slurry to flow, so that during the driving process, the mutually meshing gears can crush the ice crystals, so that the ice crystals enter the separation tower 30 in a smaller block structure, avoiding the problem that the ice crystals are too large and block the drain outlet of the sewage pool 20 or the ice slurry inlet 31.

[0061] In other embodiments, there are multiple ways to separate ice crystals from concentrated liquid. In an optional solution, the separation tower 30 may include a tower body 301 and a lifting device 302 disposed in the tower body 301. The lifting device 302 is disposed in the tower body 301 in a liftable manner and is used to lift the ice crystals to the ice crystal discharge port 33. This structure can remove the ice crystals from the concentrated liquid through the lifting and moving of the lifting device 302, thereby achieving separation. This method has a simple structure and is easy to operate. The lifting device 302 can use a more commonly used cable lifting mechanism, and the embodiment of the present application does not limit the specific type of the lifting device 302.

[0062] In the process of separating ice crystals from concentrated liquid, pollutants and impurities in the concentrated liquid may adhere to the surface of ice crystals, thereby affecting the cleanliness of ice crystals. Based on this, in a preferred solution, the separation tower 30 may also include a cleaning nozzle 303, which is higher than the ice crystal discharge port 33. When the ice crystals are separated from the concentrated liquid, the cleaning nozzle 303 is used to spray cleaning water on the ice crystals, thereby cleaning the pollutants and impurities attached to the surface of the ice crystals. This solution can improve the cleanliness of ice crystals.

[0063] In a more preferred solution, the cleaning nozzle 303 can be connected to the low-temperature water outlet 41. This structure enables the low-temperature water discharged from the reservoir to also play the purpose of cleaning ice crystals, thereby further improving the utilization efficiency of the low-temperature water in the reservoir. At the same time, since the temperature of the low-temperature water in the reservoir is relatively low, the use of the low-temperature water in the reservoir to clean the ice crystals will not cause excessive melting of the ice crystals, which is conducive to ensuring cleaning while preventing excessive loss of ice crystals. In this process, the low-temperature water in the reservoir is used as cleaning water.

[0064] As described above, the drain outlet of the first cold source pool 10 can be connected to the river. Since the temperature of the reservoir low-temperature water in the first cold source pool 10 will rise after the cooling function is performed, and then the heated reservoir low-temperature water is discharged into the river, which can reduce the adverse effects on the downstream. In order to better control the discharge of the reservoir low-temperature water in the first cold source pool 10, in an optional scheme, the drain outlet of the first cold source pool 10 can be provided with a first electric control valve, and the first cold source pool 10 can be provided with a first temperature control device, the first temperature control device is connected to the first electric control valve, and when the water temperature in the first cold source pool 10 is greater than the first preset threshold value (for example, 15°C), the first electric control valve is controlled to open, thereby realizing the discharge of the heated reservoir low-temperature water into the river.

[0065] As described above, the drain outlet of the second cold source pool 60 may also be connected to the river. Similarly, the temperature of the water formed by the melting of ice crystals in the second cold source pool 60 is too low. If the water is directly discharged into the breeding pool 100, it may have an adverse effect on the aquatic. Similarly, the drain outlet of the second cold source pool 60 may also be provided with a second electric control valve, and a second temperature control device may be provided in the second cold source pool 60. The second temperature control device is connected to the second electric control valve, and when the water temperature in the second cold source pool 60 is greater than the first preset threshold, the second electric control valve is controlled to open, thereby realizing the discharge of the heated clean water (from the melting of ice crystals) to the breeding pool 100.

[0066] It should be noted that, in the embodiment of the present application, no water exchange occurs between the first cold source pool 10 and the second cold source pool 60, between the first cold source pool 10 and the sewage pool 20, and between the second cold source pool 60 and the sewage pool 20. In order to achieve more sufficient heat exchange, in a more preferred solution, a stirrer can be provided in the first cold source pool 10, the second cold source pool 60 and the sewage pool 20. The stirring of the stirrer can cause disturbance of the corresponding water in the first cold source pool 10, the second cold source pool 60 or the sewage pool 20, thereby achieving more balanced heat exchange, which is beneficial to improving the heat exchange efficiency. Figure 1 As shown, a first stirring device 11 is provided in the first cold source pool 10 , a second stirring device 21 is provided in the sewage pool 20 , and a third stirring device 61 is provided in the second cold source pool 60 .

[0067] In order to improve the refrigeration and cooling efficiency, optionally, the volume ratio of the first cold source pool 10, the second cold source pool 60 and the sewage pool 20 can be 4:2:1.

[0068] Considering that most of the areas where domestic water conservancy and hydropower projects are located are Class II water quality standard areas, sewage discharge is not allowed. Therefore, in the aquarium breeding system disclosed in the embodiment of the present application, the first cold source pool 10 and the second cold source pool 60 can be closed pool chambers, and the low-temperature water of the reservoir only stays in the first cold source pool 10, and flows back to the river channel after the temperature rises, and will not be exchanged with the water in other spaces.

[0069] The aquaculture system disclosed in the embodiment of the present application may also include a sewage pretreatment device, which may be connected to the sewage pool 20. The sewage pretreatment device is used to perform pretreatment measures such as filtration, sedimentation, and oil removal on the aquaculture sewage to remove insoluble matter. The aquaculture sewage is pretreated by the sewage pretreatment device and then discharged into the sewage pool 20, and then subjected to a subsequent cooling process. The use of the sewage pretreatment device can undoubtedly improve the treatment effect of the aquaculture sewage.

[0070] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An aquaculture system, characterized in that: It comprises a first cold source pool (10), a sewage pool (20), a separation tower (30), a breeding pool (100) and a refrigeration module, wherein: The water inlet of the first cold source pool (10) is connected to the low-temperature water outlet (41) of the reservoir (40), and the water outlet of the first cold source pool (10) is connected to the river; The first cold source pool (10) cooperates with the sewage pool (20) in heat exchange, the refrigeration module and the first cold source pool (10) cool the aquaculture sewage in the sewage pool (20) to form ice slurry, and the water inlet of the sewage pool (20) is connected to the sewage outlet of the aquaculture pool (100); The separation tower (30) is provided with an ice slurry inlet (31), a concentrated liquid discharge port (32) and an ice crystal discharge port (33); the ice slurry inlet (31) is in communication with the drain port of the sewage pool (20) to receive the ice slurry discharged from the sewage pool (20); the ice crystal discharge port (33) is higher than the concentrated liquid discharge port (32); the ice crystal discharge port (33) discharges ice crystals separated from the ice slurry; the concentrated liquid discharge port (32) discharges the concentrated liquid separated from the ice slurry; It also comprises a second cold source pool (60), the second cold source pool (60) cooperates with the sewage pool (20) in heat exchange to cool the aquaculture sewage in the sewage pool (20), the water inlet of the second cold source pool (60) is connected to the ice crystal discharge port (33); the water outlet of the second cold source pool (60) is connected to the clean water inlet of the aquaculture pool (100); The refrigeration module comprises a first electric refrigeration module (70) and a second electric refrigeration module (80), the first electric refrigeration module (70) being connected between the first cold source pool (10) and the second cold source pool (60), and the second electric refrigeration module (80) being connected between the second cold source pool (60) and the sewage pool (20); The heat release end of the first electric refrigeration module (70) is in contact with the first cold source pool (10); the heat absorption end of the first electric refrigeration module (70) is in contact with the second cold source pool (60); The heat release end of the second electric refrigeration module (80) is in contact with the second cold source pool (60); the heat absorption end of the second electric refrigeration module (80) is in contact with the sewage pool (20); The reservoir (40) is provided with a hydropower generation module (90), and the tail water outlet of the hydropower generation module (90) is in communication with the water inlet of the first cold source pool (10).

2. The system according to claim 1, characterized in that The first cold source pool (10), the second cold source pool (60) and the sewage pool (20) are arranged in sequence, and the first cold source pool (10) cools the aquaculture sewage in the sewage pool (20) through the second cold source pool (60).

3. The system according to claim 1, characterized in that The reservoir (40) is provided with a hydroelectric power generation module (90), and the hydroelectric power generation module (90) is electrically connected to the first electric refrigeration module (70) and the second electric refrigeration module (80) respectively.

4. The system according to claim 1, characterized in that A filtration space is provided in the separation tower (30); the ice slurry inlet (31) is higher than the concentrated liquid discharge port (32), the filtration space is located between the ice slurry inlet (31) and the concentrated liquid discharge port (32), and the ice crystal discharge port (33) is in communication with the filtration space.

5. The system according to claim 1, characterized in that The separation tower (30) comprises a tower body (301) and a lifting device (302) disposed in the tower body (301); the lifting device (302) is disposed in the tower body (301) in a liftable manner and lifts the ice crystals to the ice crystal discharge port (33).

6. The system according to claim 4 or 5, characterized in that: The separation tower (30) further comprises a cleaning nozzle (303), wherein the cleaning nozzle (303) is higher than the ice crystal discharge port (33), and when the ice crystals are separated from the concentrated liquid, the cleaning nozzle (303) sprays cleaning water onto the ice crystals, and the cleaning nozzle (303) is connected to the low-temperature water discharge port (41).

7. The system according to claim 6, characterized in that A first electrically controlled valve is provided at the drain outlet of the first cold source pool (10), a first temperature control device is provided in the first cold source pool (10), the first temperature control device is connected to the first electrically controlled valve, and when the water temperature in the first cold source pool (10) is greater than a first preset threshold value, the first electrically controlled valve is controlled to open.

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