System for treating sewage by utilizing low-temperature water of reservoir
By utilizing a reservoir low-temperature water treatment system for sewage, ice-slurry separation technology, and hydropower generation modules, the problems of high energy consumption in sewage treatment and the impact of low-temperature water from the reservoir on the downstream environment have been solved, achieving low-energy and high-efficiency sewage treatment and secondary utilization of reservoir water.
Patent Information
- Application Number
- CN202223460540.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-23
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2032-12-23
AI Technical Summary
Existing wastewater treatment plants have high energy consumption and short equipment lifespan; the release of low-temperature water from reservoirs affects the downstream ecological environment; and stratified water intake methods are complex and costly.
The system utilizes a reservoir-based low-temperature wastewater treatment system. It uses a first cold source pool and a refrigeration module to cool the water and form ice slurry. A separation tower separates the ice crystals and concentrate. Combined with a hydroelectric power generation module, it achieves low-energy wastewater treatment and reduces the impact on the downstream environment.
It achieves low-energy wastewater treatment, reduces energy consumption in wastewater treatment, minimizes the impact on the downstream ecological environment, and improves the utilization rate of low-temperature water in the reservoir.
Smart Images
Figure CN223522319U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sewage treatment technical field especially relates to a system for treating sewage by using low temperature water of reservoir. BACKGROUND
[0002] At present, in order to solve the problem of sewage discharge polluting the environment, sewage treatment plant emerges as the times require.Sewage treatment plant receives sewage, and handles sewage, so that the water in sewage can be recycled.At the same time, the dirt in sewage is separated and realized centralized treatment.
[0003] The current sewage treatment plant adopts multiple ways to treat sewage, for example, biofilm method, activated sludge method and the like.These ways need relatively complex equipment to treat sewage, and the treatment mode is complex, and most importantly, these treatment modes have the problems of high energy consumption and short equipment life.This is not conducive to the low energy consumption treatment of sewage.
[0004] After the damming of river forms reservoir, the water in reservoir presents vertical water temperature stratification phenomenon.The low temperature water of reservoir discharge will affect downstream agricultural production, fish resources and water ecological environment.The related technology usually adopts the way of stratified water taking to realize the discharge water of reservoir, but this kind of way needs to adjust the discharge mode of reservoir, and has the problems of complex operation and high investment cost. UTILITY MODEL CONTENT
[0005] In view of the problems existing in the prior art sewage treatment mode, the utility model aims at providing a system for treating sewage by using low temperature water of reservoir, so as to realize the treatment of sewage with low energy consumption, and slow down the influence of low temperature water of reservoir on downstream ecological environment.
[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:
[0007] A system for treating sewage by using low temperature water of reservoir, comprising a first cold source pool, a sewage pool, a separation tower and a refrigeration module, wherein,
[0008] The water inlet of the first cold source pool is used for communicating with the low temperature water discharge port of the reservoir, and the water outlet of the first cold source pool is used for communicating with the river channel;The first cold source pool and the sewage pool are heat exchange matched, and the refrigeration module and the first cold source pool are used for cooling the sewage in the sewage pool;The water inlet of the sewage pool is used for communicating with the sewage pipeline;
[0009] 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 communicated with the drain port of the sewage pool to receive the ice slurry discharged by the sewage pool, the ice crystal discharge port is higher than the concentrated liquid discharge port, and the ice crystal discharge port is used for discharging the ice crystals separated from the ice slurry; and the concentrated liquid discharge port is used for discharging the concentrated liquid separated from the ice slurry.
[0010] Further, a second cold source pool is further included, the second cold source pool is heat-exchanged with the sewage pool to cool the sewage in the sewage pool, a water inlet of the second cold source pool is communicated with the ice crystal discharge port, and a drain port of the second cold source pool is used for being communicated with the river.
[0011] Further, the first cold source pool, the second cold source pool and the sewage pool are sequentially arranged, the first cold source pool is used for cooling the sewage in the sewage pool through the second cold source pool.
[0012] 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.
[0013] The heat release end of the first electric refrigeration module is in contact with the first cold source pool, and the heat absorption end of the first electric refrigeration module is in contact with the second cold source pool.
[0014] The heat release end of the second electric refrigeration module is in contact with the second cold source pool, and the heat absorption end of the second electric refrigeration module is in contact with the sewage pool.
[0015] Further, the reservoir is provided with a hydroelectric power generation module, and the hydroelectric power generation module is electrically connected with the first electric refrigeration module and the second electric refrigeration module respectively.
[0016] Further, the reservoir is provided with a hydroelectric power generation module, and a tail water outlet of the hydroelectric power generation module is communicated with a water inlet of the first cold source pool.
[0017] Further, a filter space is arranged in the separation tower, the ice slurry inlet is higher than the concentrated liquid discharge port, the filter space is located between the ice slurry inlet and the concentrated liquid discharge port, and the ice crystal discharge port is communicated with the filter space.
[0018] Further, the separation tower includes a tower body and a lifting device arranged in the tower body, the lifting device is arranged in the tower body in a liftable manner and is used for lifting the ice crystals to the ice crystal discharge port.
[0019] Further, the separation tower further comprises a cleaning nozzle, the cleaning nozzle is higher than the ice crystal discharge port, and the cleaning nozzle is used for spraying cleaning water to the ice crystals in the case of separation of the ice crystals from the concentrated liquid.
[0020] Further, the cleaning nozzle is communicated with the low-temperature water discharge port.
[0021] Further, the first cold source pool is provided with a first electric control valve, and the first cold source pool is provided with a first temperature control device, the first temperature control device is connected with the first electric control valve, and the first electric control valve is controlled to be opened in the case that the water temperature in the first cold source pool is greater than a first preset threshold.
[0022] The system for treating sewage by using low-temperature water of a reservoir has the following beneficial effects:
[0023] The system for treating sewage by using low-temperature water of a reservoir disclosed in the embodiment of the present application can realize physical separation of the sewage, so that the water in the sewage can be recycled and the pollutants in the sewage can be further concentrated and separated.
[0024] It can be known from the above process that the system for treating sewage by using low-temperature water of a reservoir disclosed in the embodiment of the present application can fully utilize the low-temperature characteristics of the low-temperature water of the reservoir, and further can treat the sewage, avoid excessive energy consumption of the refrigeration module, and thus can reduce the energy consumption in the process of treating the sewage. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.
[0026] Figure 1 The system for treating sewage by using low-temperature water of a reservoir is a schematic diagram of the present application embodiment;
[0027] Figure 2 It is a structural schematic diagram of the separation tower.
[0028] Legend of reference signs:
[0029] 10 - first cold source pool, 11 - first stirring device,
[0030] 20 - sewage pool, 21 - second stirring device,
[0031] 30 - separation tower, 31 - ice slurry inlet, 32 - concentrated liquid discharge port, 33 - ice crystal discharge port, 301 - tower body, 302 - lifting device, 303 - cleaning spray head,
[0032] 40 - reservoir, 41 - low-temperature water discharge port,
[0033] 50 - sewage pipeline,
[0034] 60 - second cold source pool, 61 - third stirring device,
[0035] 70 - first electric refrigeration module, 80 - second electric refrigeration module,
[0036] 90 - hydroelectric power generation module, 100 - residential site. DETAILED DESCRIPTION
[0037] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below in combination with the drawings.
[0038] Please refer to Figure 1 and Figure 2 The embodiment of the application discloses a system for treating sewage by using low-temperature water of a reservoir, which comprises a first cold source pool 10, a sewage pool 20, a separation tower 30 and a refrigeration module.
[0039] The first cold source pool 10 plays a role in cooling, and the water inlet of the first cold source pool 10 is used for being communicated with the low-temperature water discharge port 41 of the reservoir 40. The reservoir low-temperature water of the reservoir 40 enters the first cold source pool 10 through the low-temperature water discharge port 41 and the water inlet of the first cold source pool 10 for standby. The reservoir low-temperature water is low in temperature, and thus the first cold source pool 10 has the role of cooling after the reservoir low-temperature water enters the first cold source pool 10. After the reservoir low-temperature water completes the cooling work, the reservoir low-temperature water can be discharged through the water discharge port of the first cold source pool 10. Specifically, the water discharge port of the first cold source pool 10 can be communicated with a river channel, and the reservoir low-temperature water in the first cold source pool 10 can be discharged into the river channel after the reservoir low-temperature water plays the cooling function. The water discharge port of the first cold source pool 10 can be provided with an on-off valve to control the water discharge work of the first cold source pool 10.
[0040] The first cold source pool 10 exchanges heat with the sewage pool 20 to cool the sewage in the sewage pool 20. The refrigeration module is used for refrigeration, and the refrigeration module cooperates with the first cold source pool 10 to enable the sewage to form ice slurry. The water inlet of the sewage pool 20 is used for communication with the sewage pipeline 50. The sewage generated by the living place 100 of people enters the sewage pipeline 50 and finally enters the sewage pool 20 through the sewage pipeline 50 to be treated.
[0041] 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 communicated with the drain of the sewage pool 20 to receive the ice slurry discharged from the sewage pool 20. As described above, the sewage in the sewage pool 20 is cooled to form ice slurry (which is essentially a mixture containing liquid and ice crystals), and the ice slurry is discharged from the drain of the sewage pool 20 and enters the separation tower 30 through the ice slurry inlet 31.
[0042] The ice crystal discharge port 33 is used for discharging the ice crystals separated from the ice slurry. The concentrated liquid discharge port 32 is used for discharging the concentrated liquid separated from the ice slurry. After the ice slurry is formed, the ice crystals are suspended due to the smaller density, and the water in the sewage is essentially extracted.
[0043] In the embodiment of the present application, the ice crystal discharge port 33 is higher than the concentrated liquid discharge port 32, so that the ice crystals can be separated from the concentrated liquid when the ice crystals reach the ice crystal discharge port 33, and the separated ice crystals are discharged through the ice crystal discharge port 33 to realize the recovery of water in the sewage. 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 freeze-drying crystallization, evaporation crystallization or drying treatment and other end treatments.
[0044] The system for treating sewage by using reservoir low-temperature water disclosed in the embodiment of the present application introduces the reservoir low-temperature water discharged from the reservoir into the first cold source pool 10, so that the sewage in the sewage pool 20 is cooled by the reservoir low-temperature water with a lower temperature, and under the cooperation of the refrigeration module, the liquid sewage can be converted into ice slurry. 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 sewage, and the ice crystal discharge port 33 separates the ice crystals for subsequent secondary use. The pollutants in the sewage remain in the concentrated liquid and are discharged from the separation tower 30 through the concentrated liquid discharge port 32. This process realizes the physical separation of the sewage, so that the water in the sewage can be recovered and the pollutants in the sewage can be further concentrated and separated.
[0045] Through the above process, it can be known that the system for treating sewage by using low-temperature water of a reservoir disclosed in the embodiments of the present application can fully utilize the low-temperature characteristics of the low-temperature water of the reservoir, and thus can treat the sewage, and avoid excessive energy consumption of the refrigeration module, so as to reduce the energy consumption in the sewage treatment process.
[0046] It should be explained that after a river is dammed to form a reservoir, the water in the reservoir presents a vertical water temperature stratification phenomenon, and the temperature of the upper layer water of the reservoir is higher than that of the lower layer water of the reservoir. The temperature of the water at the bottom of the reservoir is the lowest. The water discharged from the reservoir is the lower layer water of the reservoir or the water at the bottom of the reservoir, and thus the temperature of the water discharged from the reservoir is much lower than that of the water in a natural river channel. In this paper, the low-temperature water of the reservoir refers to the water with a relatively low temperature discharged from the reservoir, for example, the water below a preset height (for example, 5 meters or 10 meters) of the water surface in the reservoir.
[0047] Since the temperature of the water discharged from the reservoir is much lower than that of the water in a natural river channel, if the water discharged from the reservoir is directly discharged, it will affect the agricultural production, fish resources and water ecological environment of the downstream. In the related art, the water discharged from the reservoir is usually taken by stratification, for example, when the water is discharged from the reservoir, a part of the upper layer water is discharged at the same time, and a part of the lower layer water is also discharged, so that the two are mixed to prevent the temperature of the water discharged from the reservoir from being too low, and thus to reduce the adverse effects on the downstream. Obviously, this needs to adjust the discharge mode of the reservoir, and has the problems of complex operation and high investment cost.
[0048] The system for treating sewage by using low-temperature water of a reservoir disclosed in the embodiments of the present application can directly discharge the low-temperature water of the reservoir, and through heat exchange between the low-temperature water of the reservoir and the sewage, the temperature of the low-temperature water of the reservoir is increased, so that it can heat exchange with the sewage, and then be discharged to the downstream of the reservoir, thereby relieving the adverse effects on the agricultural production, fish resources and aquatic ecological environment of the downstream. As can be seen, the system for treating sewage by using low-temperature water of a reservoir disclosed in the embodiments of the present application not only realizes low-energy consumption treatment of the sewage, but also solves the problem of adverse effects caused by the discharge of the low-temperature water of the reservoir, and achieves multiple purposes at one time, and has relatively significant actual economic benefits.
[0049] The system for treating sewage by using low-temperature water of a reservoir disclosed in the embodiments of the present application essentially adopts the design idea of freezing concentration, and is based on the solid-liquid balance principle of freezing separation. In a low-temperature environment, sewage is cooled below the freezing point of water, and the physical property that the freezing point of solutes in sewage is much lower than the freezing point of water is used to make water in the sewage preferentially precipitate in a solid phase and freeze into ice crystals, and then the impurities in the sewage are excluded. Finally, the relatively pure ice crystals in the solid phase and the concentrated liquid containing impurities in the liquid phase are separated by the separation tower 30. The concentrated liquid can be concentrated for treatment at the end, and the ice crystals are used as a cold source to achieve secondary use or recovery, so as to meet the requirement of low emission. At the same time, the system for treating sewage by using low-temperature water of a reservoir disclosed in the present application has no selectivity to sewage and can treat various sewage, such as domestic sewage, salt-containing wastewater, and sewage generated in aquaculture.
[0050] The system for treating sewage by using low-temperature water of a reservoir disclosed in the embodiments of the present application can further include a second cold source pool 60, which is used for heat exchange with the sewage pool 20 to cool the sewage in the sewage pool 20. The water inlet of the second cold source pool 60 is in communication with the ice crystal discharge port 33, and the ice crystals discharged from the ice crystal discharge port 33 enter the second cold source pool 60, so that the temperature of the second cold source pool 60 is relatively low, thereby achieving heat exchange with the sewage pool 20 and further cooling the sewage pool 20, and more easily making the sewage in the sewage pool 20 into ice slurry. This preferred scheme not only can fully utilize the treated product ice crystals, but also can further improve the cooling efficiency of the sewage, achieving the purpose of killing two birds with one stone. Specifically, the water discharge port of the second cold source pool 60 is used for communication with a river, so that the water with a relatively high temperature formed after heat exchange of the ice crystals can be discharged into the river to achieve the purpose of supplementing the downstream water, and will not cause adverse effects on the downstream.
[0051] In the embodiments of the present application, the first cold source pool 10 can directly heat exchange with the sewage pool 20, or indirectly heat exchange with the sewage pool 20. Similarly, the second cold source pool 60 can directly heat exchange with the sewage pool 20, or indirectly heat exchange with the sewage pool 20. In an optional scheme, the first cold source pool 10, the second cold source pool 60 and the sewage pool 20 can be sequentially arranged. The first cold source pool 10 is used for cooling the sewage in the sewage pool 20 through the second cold source pool 60. In this way, the first cold source pool 20 indirectly cools the sewage pool 20 through the second cold source pool 60, and the second cold source pool 60 directly cools the sewage pool 20. Of course, in this case, while the ice crystals in the second cold source pool 60 are heat-exchanged into water to cool the sewage pool 20, the water formed by heat exchange of the ice crystals in the second cold source pool 60 further receives the cold energy of the low-temperature water of the reservoir in the first cold source pool 10, so as to further cool the sewage in the sewage pool 20.
[0052] 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, which is beneficial to the discharge of the water with increased temperature after heat exchange in the first cold source pool 10 and the second cold source pool 60 into the river.
[0053] In the system for treating sewage by using low-temperature water of the reservoir disclosed in the embodiments of the present application, the type of the refrigeration module can be various, for example, the refrigeration module can be an ice maker. Of course, the refrigeration module can also be of other types. In an optional solution, the refrigeration module can include a first electric refrigeration module 70 connected between the first cold source pool 10 and the second cold source pool 60, the heat releasing end of the first electric refrigeration module 70 being in contact with the first cold source pool 10, and the heat absorbing end of the first electric refrigeration module 70 being in contact with the second cold source pool 60. When the first electric refrigeration module 70 works, the heat absorbing 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 releasing end of the first electric refrigeration module 70 releases the heat absorbed by the heat absorbing end of the first electric refrigeration module 70 into the first cold source pool 10, thereby achieving heating of the first cold source pool 10. In this process, the cold energy in the first cold source pool 10 is indirectly delivered into the second cold source pool 60. This structure can improve the cooling efficiency of the first cold source pool 10 on the second cold source pool 60 by the first electric refrigeration module 70.
[0054] Similarly, in the system for treating sewage by using low-temperature water of the reservoir disclosed in the embodiments of the present application, the refrigeration module can also include a second electric refrigeration module 80 connected between the second cold source pool 60 and the sewage pool 20. Specifically, the heat releasing end of the second electric refrigeration module 80 is in contact with the second cold source pool 60, and the heat absorbing end of the second electric refrigeration module 80 is in contact with the sewage pool 20. The heat releasing end of the second electric refrigeration module 80 releases the heat absorbed by the heat absorbing end of the second electric refrigeration module 80 into the second cold source pool 60, thereby achieving heating of the second cold source pool 60. In this process, the cold energy in the second cold source pool 60 is indirectly delivered into the sewage pool 20. This structure can improve the cooling efficiency of the second cold source pool 60 on the sewage pool 20 by the second electric refrigeration module 80.
[0055] Specifically, the first electric refrigeration module 70 and the second electric refrigeration module 80 can be semiconductor refrigeration mechanisms, and the embodiments of the present application do not limit the specific types of the first electric refrigeration module 70 and the second electric refrigeration module 80.
[0056] In the embodiment of the present application, the reservoir 40 can be provided with a hydroelectric power generation module 90, which can be electrically connected with the first electric refrigeration module 70 and the second electric refrigeration module 80 respectively, so as to supply power for the first electric refrigeration module 70 and the second electric refrigeration module 80. This scheme can make full use of the electric energy generated by the reservoir low-temperature water discharged from the reservoir to supply power for the first electric refrigeration module 70 and the second electric refrigeration module 80, without additional consumption of the electric energy in the power grid, and still can better meet the purpose of low energy consumption.
[0057] Further, the reservoir 40 is provided with the hydroelectric power generation module 90, and a tail water outlet of the hydroelectric power generation module 90 is in communication with a water inlet of the first cold source pool 10. This structure can make the reservoir low-temperature water discharged from the reservoir pass through the hydroelectric power generation module 90 to generate electricity, and then be discharged into the first cold source pool 10 for subsequent treatment of the sewage. Obviously, this structure can make the reservoir low-temperature water be more fully utilized, improve its utilization rate, and achieve the purpose of one thing serving multiple purposes. This can further improve the economic benefit. It needs to be explained that the tail water outlet refers to a water outlet of the hydroelectric power generation module 90. The reservoir low-temperature water passing through the hydroelectric power generation module 90 will drive the hydroelectric power generation module 90 to generate electricity, and finally be discharged through the water outlet of the hydroelectric power generation module 90.
[0058] As described above, the separation tower 30 is used to realize the separation of ice crystals and concentrated liquid. In one embodiment, a filtering space can be arranged in the separation tower 30, 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 in communication with 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 into 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 passes through the filtering space and continues to fall, while the ice crystals in the ice slurry are left in the filtering space, and finally the separation of the ice crystals and the concentrated liquid is realized. The ice crystals left in the filtering space will be discharged through the ice crystal discharge port 33 for secondary utilization. This way can make the ice slurry realize the separation of ice crystals and concentrated liquid in the process of entering the separation tower 30 and falling, without the need to arrange 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 arranged at the water outlet of the sewage pool 20, which drives the ice slurry to flow, so that the ice slurry flows into the separation tower 30.
[0059] In an alternative solution, the driving mechanism can be a gear pump, which is arranged at the outlet of the sewage tank 20 or at the ice slurry inlet 31, and is capable of driving the ice slurry into the separation tower 30. The gear pump drives the fluid by means of intermeshing gears, and the use of the gear pump to drive the ice slurry flow can crush the ice crystals in the process of driving, so that the ice crystals enter the separation tower 30 in the form of small blocks, avoiding the problem of the ice crystals being too large to block the outlet of the sewage tank 20 or the ice slurry inlet 310.
[0060] In other embodiments, the specific way of separating the ice crystals and the concentrated liquid can be various. In an alternative solution, the separation tower 30 can include a tower body 301 and a lifting device 302 arranged in the tower body 301. The lifting device 302 is arranged in the tower body 301 in a lifting manner and is used to lift the ice crystals to the ice crystal discharge port 33. This structure can lift the ice crystals from the concentrated liquid by lifting the lifting device 302, thereby achieving separation. This way is simple in structure and convenient to operate. The lifting device 302 can be a commonly used cable lifting mechanism, and the embodiments of the present application do not limit the specific type of the lifting device 302.
[0061] In the process of separating the ice crystals and the concentrated liquid, the impurities in the concentrated liquid can adhere to the surface of the ice crystals, thereby affecting the cleanliness of the ice crystals. Based on this, in a preferred solution, the separation tower 30 can further include a cleaning nozzle 303, which is higher than the ice crystal discharge port 33. In the case of separating the ice crystals and the concentrated liquid, the cleaning nozzle 303 is used to spray cleaning water to the ice crystals, thereby cleaning the impurities adhering to the surface of the ice crystals. This solution can improve the cleanliness of the ice crystals.
[0062] In a more preferred solution, the cleaning nozzle 303 can be in communication with the low-temperature water discharge port 41. This structure can make the reservoir low-temperature water discharged from the reservoir also play the purpose of cleaning the ice crystals, thereby further improving the utilization efficiency of the reservoir low-temperature water. At the same time, since the temperature of the reservoir low-temperature water is low, the use of the reservoir low-temperature water to clean the ice crystals will not cause excessive melting of the ice crystals, which is conducive to ensuring cleanliness without causing excessive loss of the ice crystals. In this process, the reservoir low-temperature water is used as cleaning water.
[0063] As described above, the drain outlet of the first cold source pool 10 can be communicated with the river. After the reservoir low-temperature water in the first cold source pool 10 plays the cooling function, the temperature of the reservoir low-temperature water will rise, and then the reservoir low-temperature water after rising in temperature is discharged into the river, so that the adverse effects on the downstream can be reduced. In order to better control the discharge of the reservoir low-temperature water in the first cold source pool 10, in an optional solution, 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 with the first electric control valve, and in the case that the water temperature in the first cold source pool 10 is greater than a first preset threshold (for example, 15℃), the first electric control valve is controlled to be opened, so that the reservoir low-temperature water after rising in temperature is discharged into the river.
[0064] As described above, the drain outlet of the second cold source pool 60 can also be communicated with the river. Similarly, the temperature of the water formed by the melting of the ice crystals in the second cold source pool 60 is too low, and if the water is directly discharged, it will also cause adverse effects on the downstream. Similarly, the drain outlet of the second cold source pool 60 can also be provided with a second electric control valve, and the second cold source pool 60 can be provided with a second temperature control device, the second temperature control device is connected with the second electric control valve, and in the case that the water temperature in the second cold source pool 60 is greater than a first preset threshold, the second electric control valve is controlled to be opened, so that the water (formed by the melting of the ice crystals) after rising in temperature is discharged into the river.
[0065] It should be noted that in the embodiments of the present application, there is no exchange of water bodies 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, the first cold source pool 10, the second cold source pool 60 and the sewage pool 20 can each be provided with a stirrer. The stirring of the stirrer can cause the corresponding water body in the first cold source pool 10, the second cold source pool 60 or the sewage pool 20 to be disturbed, so that more balanced heat exchange is achieved, which is beneficial to improve the heat exchange efficiency. As shown in Figure 1 As shown in the figure, the first cold source pool 10 is provided with a first stirring device 11, the sewage pool 20 is provided with a second stirring device 21, and the second cold source pool 60 is provided with a third stirring device 61.
[0066] 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 16:4:1.
[0067] Considering that the regions where domestic water conservancy and hydropower projects are located are mostly regions with Class II water quality standards, and no sewage can be discharged. Therefore, in the system for treating sewage by using reservoir low-temperature water disclosed in the embodiments of the present application, the first cold source pool 10 and the second cold source pool 60 can each be a closed pool room, and the reservoir low-temperature water only stays in the first cold source pool 10, and then flows back to the river after the temperature rises, and does not exchange with the water bodies in other spaces.
[0068] The system for treating sewage by using low-temperature water of a reservoir disclosed by the embodiments of the present application can further comprise a sewage pretreatment device, which can be connected with the sewage pool 20, and is used for filtering, settling, removing oil and other pretreatment measures on the sewage to remove insoluble substances. The sewage is discharged into the sewage pool 20 after being pretreated by the sewage pretreatment device, and then subjected to subsequent cooling process. The use of the sewage pretreatment device can undoubtedly improve the treatment effect on the sewage.
[0069] The above only describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.
Claims
1. A system for treating sewage using low temperature water from a reservoir, characterized by, The system comprises a first cold source pool (10), a sewage pool (20), a separation tower (30) and a refrigeration module, wherein, The water inlet of the first cold source pool (10) is used for communicating with the low-temperature water discharge port (41) of the reservoir (40), and the water outlet of the first cold source pool (10) is used for communicating with the river channel; the first cold source pool (10) is in heat exchange cooperation with the sewage pool (20), the refrigeration module and the first cold source pool (10) are used for cooling the sewage in the sewage pool (20) to form ice slurry; the water inlet of the sewage pool (20) is used for communicating with the sewage pipeline (50); 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) communicates with the water outlet of the sewage pool (20) to receive the ice slurry discharged by the sewage pool (20), the ice crystal discharge port (33) is higher than the concentrated liquid discharge port (32), and the ice crystal discharge port (33) is used for discharging the ice crystals separated from the ice slurry; the concentrated liquid discharge port (32) is used for discharging the concentrated liquid separated from the ice slurry.
2. The system of claim 1, wherein, Further comprising a second cold source pool (60), the second cold source pool (60) is in heat exchange cooperation with the sewage pool (20) to cool the sewage in the sewage pool (20), the water inlet of the second cold source pool (60) communicates with the ice crystal discharge port (33); the water outlet of the second cold source pool (60) is used for communicating with the river channel.
3. The system of claim 2, wherein, The first cold source pool (10), the second cold source pool (60) and the sewage pool (20) are sequentially arranged, and the first cold source pool (10) is used for cooling the sewage in the sewage pool (20) through the second cold source pool (60).
4. The system of claim 3, wherein, The refrigeration module comprises a first electric refrigeration module (70) and a second electric refrigeration module (80), the first electric refrigeration module (70) is connected between the first cold source pool (10) and the second cold source pool (60), and the second electric refrigeration module (80) is connected between the second cold source pool (60) and the sewage pool (20); The heat releasing end of the first electric refrigeration module (70) is in contact with the first cold source pool (10), and the heat absorbing end of the first electric refrigeration module (70) is in contact with the second cold source pool (60); The heat releasing end of the second electric refrigeration module (80) is in contact with the second cold source pool (60), and the heat absorbing end of the second electric refrigeration module (80) is in contact with the sewage pool (20).
5. The system of claim 4, wherein, The reservoir (40) is provided with a hydroelectric power generation module (90), and the hydroelectric power generation module (90) is electrically connected with the first electric refrigeration module (70) and the second electric refrigeration module (80) respectively.
6. The system of claim 1, wherein, The reservoir (40) is provided with a hydroelectric power generation module (90), and the tail water outlet of the hydroelectric power generation module (90) communicates with the water inlet of the first cold source pool (10).
7. The system of claim 1, wherein, The separation tower (30) is provided with a filtering space; the ice slurry inlet (31) is higher than the concentrated liquid discharge port (32), the filtering space is located between the ice slurry inlet (31) and the concentrated liquid discharge port (32), and the ice crystal discharge port (33) is communicated with the filtering space.
8. The system of claim 1, wherein, The separation tower (30) comprises a tower body (301) and a lifting device (302) arranged in the tower body (301), the lifting device (302) is arranged in the tower body (301) in a lifting manner, and is used for lifting the ice crystals to the ice crystal discharge port (33).
9. The system of claim 7 or 8, wherein, The separation tower (30) further comprises a cleaning nozzle (303), the cleaning nozzle (303) is higher than the ice crystal discharge port (33), the cleaning nozzle (303) is used for spraying cleaning water to the ice crystals in the case of separation of the ice crystals and the concentrated liquid, and the cleaning nozzle (303) is communicated with the low-temperature water discharge port (41).
10. The system of claim 9, wherein, The water discharge port of the first cold source pool (10) is provided with a first electric control valve, the first cold source pool (10) is provided with a first temperature control device, the first temperature control device is connected with the first electric control valve, and the first electric control valve is controlled to be opened in the case that the water temperature in the first cold source pool (10) is greater than a first preset threshold.