Long-acting water transparency improving system

Abstract

The utility model belongs to the technical field of water treatment, and provides a long-acting water transparency improving system which comprises a pretreatment unit, a magnetic coagulation device, a magnetic disk separation device and a magnetic medium recycling device which are sequentially connected through pipelines, wherein the water inlet end of the pretreatment unit is connected with a treatment target water area; a water outlet of the magnetic disc separation device is connected back to a treated target water area, and a magnetic floc outlet is connected with the magnetic medium recycling device; and a magnetic medium circulating discharge hole of the magnetic medium recycling device is connected to the magnetic coagulation device. The system adopts magnetic coagulation and magnetic separation to perform bypass purification on a water body, the occupied area is small, the starting speed is high, pollutants such as algae and phosphorus nutritive salt can be effectively removed, and the transparency of the water body is rapidly improved; the method is further combined with in-situ aquatic plants for application, and has the advantages of short treatment time, good purification effect and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and particularly relates to a long-term water body transparency improvement system. Background Art

[0002] The water ecological environment is an important part of the ecological environment construction. Making more and more rivers and lakes present the scene of "clear water, green banks, and fish swimming at the bottom" is the vision of water environment governance in the new era. To achieve a grass-type clear water steady state in rivers and lakes with "dominant submerged plants, high transparency, and good visual effects", transparency is a crucial indicator. Transparency is a comprehensive reflection of the amount of phytoplankton and inorganic suspended solids, and is affected by physical, chemical, and biological factors. When the concentration of nutrients in the water increases, causing a large amount of growth of phytoplankton, and when the bottom sediment is resuspended due to wind and waves and fish foraging, the water body transparency will decrease. With the decrease in transparency, submerged plants will not be able to carry out effective photosynthesis, which will then lead to the decline and disappearance of submerged plants. After the disappearance of submerged plants, the positive feedback effect will strengthen the development of the water body towards a state of "dominant algae, low transparency, and poor visual effects".

[0003] Therefore, in the governance of the river and lake water ecological environment, whether in the early stage of planting submerged plants or during the operation process, it is necessary to ensure the water body transparency to guarantee the planting and stable growth of submerged plants. The existing technologies for improving water body transparency include physical methods, chemical methods, and biological methods. Physical methods include: ① manually or mechanically salvaging water body algae, which is time-consuming and laborious and difficult to maintain continuously; ② changing water or lowering the water level, which requires a large amount of water resources and is likely to cause waste of water resources. Chemical methods mainly involve adding chemical agents such as polyaluminum chloride, polyferric sulfate, and polyacrylamide. This method has a quick effect, but often requires multiple additions, has a certain toxic effect on water body organisms, and the pollutants flocculate and sink to the bottom, resulting in poor implementation effects in large water areas. Biological methods include: ① controlling algae by adding filter-feeding fish such as silver carp and bighead carp, and large cladocerans such as algae-eating insects. This method is often ineffective against large algae and cannot function properly when the water body is an inorganic turbid water body; ② adding microbial agents, which is relatively eco-friendly, but it takes a long time to isolate and purify microbial species, and the effect is not ideal in large water area applications.

[0004] Based on the deficiencies of the above-mentioned current technologies, this application is thus generated. Content of the Utility Model

[0005] In view of the deficiencies of the above-mentioned existing technologies, the utility model provides a long-term water body transparency improvement system. This system uses magnetic coagulation and magnetic separation to purify the water body by-pass, can effectively remove pollutants such as algae and phosphorus nutrients, quickly improve the water body transparency, has low cost, less introduced impurities, fast treatment speed, and good purification effect, and can provide a long-term transparent purification mechanism for the target water area to be treated.

[0006] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0007] A long - acting water body transparency improvement system, comprising a pretreatment unit, a magnetic coagulation device, a disk separation device and a magnetic medium recovery and circulation device which are connected in sequence through pipelines;

[0008] Wherein, the water inlet end of the pretreatment unit is connected to the target water area to be treated;

[0009] The water outlet of the disk separation device is connected back to the target water area to be treated, and the magnetic floc outlet is connected to the magnetic medium recovery and circulation device;

[0010] The magnetic medium circulation discharge port of the magnetic medium recovery and circulation device is connected to the magnetic coagulation device.

[0011] In an embodiment of the present application, a cut - off device is further included. The cut - off device is arranged at the upstream incoming water of the target water area to be treated. The water inlet end of the pretreatment unit is connected to the upstream section of the cut - off device, and the water outlet of the disk separation device is connected back to the downstream section of the cut - off device.

[0012] In an embodiment of the present application, the water inlet end of the pretreatment unit is connected to the end of the target water area to be treated, and the water outlet of the disk separation device is connected back to the front end of the target water area to be treated.

[0013] In an embodiment of the present application, a sludge treatment unit is further included. The sludge treatment unit includes a sludge tank, a filtrate tank, a dehydrator and a first chemical dosing device;

[0014] The sludge outlet of the magnetic medium recovery and circulation device is connected to the sludge tank. The sludge tank is connected to the dehydrator through a sludge transfer pump. The liquid outlet of the dehydrator is connected to the filtrate tank. The filtrate tank is connected to the magnetic coagulation device through a filtrate pump;

[0015] The first chemical dosing device is connected to the dehydrator.

[0016] In an embodiment of the present application, the pretreatment unit includes a grille channel and a collecting tank. The water inlet end of the grille channel is connected to the target water area to be treated, and the water outlet end is connected to the collecting tank; a coarse grille and a fine grille are sequentially arranged in the grille channel. The collecting tank is connected to the water inlet end of the magnetic coagulation device through a lift pump.

[0017] In an embodiment of the present application, the magnetic coagulation device includes a magnetic coagulation reaction chamber and a magnetic flocculation reaction chamber which are arranged in sequence;

[0018] It further includes a second chemical dosing device and a third chemical dosing device. The second chemical dosing device is connected to the front end of the magnetic coagulation reaction chamber, and the third chemical dosing device is connected to the front end of the magnetic flocculation reaction chamber.

[0019] In an embodiment of the present application, the magnetic medium recovery and circulation device includes a high-speed disperser, a magnetic separation magnetic drum, and a magnetic medium stirring tank that are connected to each other. The magnetic floc outlet of the disk separation device is connected to the high-speed disperser, and the magnetic medium stirring tank is connected to the front end of the magnetic coagulation device through a magnetic medium circulation pump.

[0020] In an embodiment of the present application, a feeding port is further provided on the magnetic medium stirring tank for adding magnetic medium.

[0021] In an embodiment of the present application, an aquatic plant coverage area is provided in the target water area to be treated. The aquatic plant coverage area includes a submerged plant area, a floating-leaved plant area, and an emergent plant area.

[0022] In an embodiment of the present application, the coverage area of the aquatic plant coverage area is 30% or more of the area of the target water area to be treated.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] 1. The long-term water transparency improvement system of the present utility model adopts a magnetic coagulation and magnetic separation purification device. By taking water and discharging water back at suitable parts of the target water area to be treated, a bypass purification is formed. Magnetic medium is added as a carrier to form magnetic flocs, and the magnetic flocs and water are directly separated by means of the disk magnetic field force, so as to purify the water body of the target water area to be treated. It can efficiently remove suspended solids and turbidity, and the removal rate of suspended solids and turbidity can reach more than 90%; it can efficiently remove algae, and the removal rate of algae can reach more than 95%; it can efficiently remove total phosphorus (phosphorus nutrient salt), and the removal rate of total phosphorus can reach more than 80%, and can effectively strengthen and long-term improve the water transparency. Moreover, it has the advantages of small floor area, fast start-up speed, short treatment time, and good purification effect.

[0025] 2. The long-term water transparency improvement system of the present utility model sets a submerged plant area, a floating-leaved plant area, and an emergent plant area in the target water area to be treated, combines the bypass magnetic coagulation and magnetic separation purification of the long-term water transparency improvement system with in-situ aquatic plants, can strengthen the removal of NH3-N, TN, and COD, further intercept suspended solids, inhibit the growth of algae, reduce the water nutrient salt, strengthen the improvement of transparency, and form a long-term transparency purification mechanism. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of a long - acting water body transparency improvement system according to an embodiment of the present utility model.

[0028] Figure 2 Schematic diagram of another embodiment of the long - acting water body transparency improvement system of the present utility model.

[0029] Figure 3 Schematic diagram of the structure of the sludge treatment unit in the present utility model.

[0030] Figure 4 Schematic diagram of the structure of the magnetic medium recovery and recycling device in the present utility model.

[0031] Reference numerals:

[0032] 1. Pretreatment unit; 11. Grid channel; 111. Coarse grid; 112. Fine grid; 12. Collection tank; 121. Lift pump;

[0033] 2. Magnetic coagulation device; 21. Magnetic coagulation reaction chamber; 22. Magnetic flocculation reaction chamber; 23. Second chemical dosing device; 24. Third chemical dosing device;

[0034] 3. Disk separation device;

[0035] 4. Magnetic medium recovery and recycling device; 41. High - speed disperser; 42. Magnetic separation magnetic drum; 43. Magnetic medium mixing tank; 44. Magnetic medium circulation pump;

[0036] 5. Target water area for treatment; 51. Submerged plant area; 52. Floating - leaf plant area; 53. Emergent plant area;

[0037] 6. Interception device;

[0038] 7. Sludge treatment unit; 71. Sludge tank; 711. Sludge transfer pump; 72. Filtrate tank; 721. Filtrate pump; 73. Dewatering machine; 74. First chemical dosing device; Detailed implementation manners

[0039] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of the present utility model are usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0041] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0042] In the present utility model, unless otherwise clearly defined and limited, the terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0044] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model.

[0045] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0046] The embodiment of the present utility model provides a long - acting water body transparency improvement system, which includes a pretreatment unit 1, a magnetic coagulation device 2, a disk separation device 3, a magnetic medium recovery and recycling device 4, etc.

[0047] Among them, the pretreatment unit 1, the magnetic coagulation device 2, the disk separation device 3, and the magnetic medium recovery and recycling device 4 are sequentially connected and arranged through pipelines.

[0048] The water inlet end of the pretreatment unit 1 is connected to the target water area 5 to be treated, and is used to draw water from an appropriate position of the target water area 5 to be treated, and intercept and treat larger suspended or floating pollutants in the water body.

[0049] The disk separation device 3 has a water outlet and a magnetic floc outlet. The water outlet of the disk separation device 3 is connected back to the target water area 5 through a pipeline to discharge the purified water body back into the target water area 5; the magnetic floc outlet of the disk separation device 3 is connected to the magnetic medium recovery and recycling device 4 to transport the magnetic flocs separated by the disk to the magnetic medium recovery and recycling device 4 for separation and recycling.

[0050] The magnetic medium circulation discharge port of the magnetic medium recovery and recycling device 4 is connected to the magnetic coagulation device 2 to add the magnetic medium separated and recycled by the magnetic medium recovery and recycling device 4 to the magnetic coagulation device 2 for recycling.

[0051] As Figure 1 shown, in an embodiment, it further includes a cut - off device 6, and the cut - off device 6 is arranged at the upstream incoming water of the target water area 5. The cut - off device 6 is a river - blocking sluice dam, which is set according to the width of the river channel, flood - discharge requirements, etc. at the upstream incoming water, and preferably a flap gate dam, a lifting steel gate, a rubber dam, etc. The water inlet end of the pretreatment unit 1 is connected to the upstream section of the cut - off device 6, and the water body to be treated is intercepted by the cut - off device 6 and sent to the pretreatment unit 1. The water outlet of the disk separation device 3 is connected back to the downstream section of the cut - off device 6 and is located on the incoming water side of the target water area 5 to discharge the purified water body into the target water area 5. This way of water intake and water drainage setting is applicable to the purification treatment of inorganic - dominated polluted water bodies with high suspended solids and high turbidity brought by river water diversion and rainy - season runoff. The treatment scale of the improvement system should be matched with the incoming water volume.

[0052] As Figure 2As shown, in another embodiment, the water inlet end of the pretreatment unit 1 is connected to the end of the water area to be treated 5, and the water outlet of the disk separation device 3 is connected back to the front end of the water area to be treated 5 (i.e., the end close to the incoming water). That is, water is taken from the end of the water area to be treated 5 (i.e., the end close to the drainage), and after purification, it is discharged back from the front end of the water area to be treated 5. This way of water intake and water intake and drainage is applicable to the purification treatment of organic-dominated polluted water bodies characterized by high nutrient salts and high algae caused by lake reservoir replenishment, sewage treatment plant tail water, insufficient water body fluidity, etc., which can enhance the water body fluidity and improve the water transparency of the water area to be treated 5.

[0053] Further, as Figure 1 , Figure 2 and Figure 3 shown, it further includes a sludge treatment unit 7, and the sludge treatment unit 7 includes a sludge tank 71, a filtrate tank 72, a dehydrator 73, a first chemical dosing device 74, etc.

[0054] Among them, the sludge tank 71 is connected to the sludge outlet of the magnetic medium recovery and recycling device 4 for temporarily storing the sludge to be treated. A stirrer is provided in the sludge tank 71 for stirring the sludge to prevent sludge deposition.

[0055] The sludge tank 71 is connected to the dehydrator 73 via a sludge pump 711, and the sludge pump 711 transports the sludge from the sludge tank 71 to the dehydrator 73 for dehydration treatment. The sludge pump 711 is preferably a screw pump. The dehydrator 73 is preferably a spiral screw dehydrator or a plate and frame filter press.

[0056] The first chemical dosing device 74 is connected to the dehydrator 73 for adding a sludge conditioner, such as positive ion PAM, to the sludge to be dehydrated, so that the sludge is easy to achieve solid-liquid separation.

[0057] The liquid outlet of the dehydrator 73 is connected to the filtrate tank 72, and the filtrate tank 72 stores the filtrate generated by dehydration for recovery treatment. The filtrate tank 72 is connected to the magnetic coagulation device 2 via a filtrate pump 721, and the filtrate is transported to the magnetic coagulation device 2 for further purification treatment and discharge.

[0058] The sludge after the water is removed by the dehydrator 73 is transported to a sludge hopper for temporary storage via a screw pump or a screw conveyor, and then transported away by a vehicle for treatment.

[0059] Preferably, the pretreatment unit 1 includes a grille channel 11 and a collecting tank 12 arranged in sequence. The water inlet end of the grille channel 11 is connected to the water area to be treated 5 for water intake. A gate is provided at the water inlet of the grille channel 11 to control the water intake flow rate; the water outlet end of the grille channel 11 is connected to the collecting tank 12; a coarse grille 111 and a fine grille 112 are successively arranged in the grille channel 11 from front to back for intercepting larger suspended or floating pollutants in the water body.

[0060] A lift pump 121 is installed in the sump 12. It is connected to the water inlet end of the magnetic coagulation device 2 via the lift pump 121 to lift the water body to be treated to the magnetic coagulation device 2 for subsequent magnetic coagulation and magnetic separation treatment. This lift pump is preferably a submersible sewage pump.

[0061] The magnetic coagulation device 2 includes a magnetic coagulation reaction chamber 21 and a magnetic flocculation reaction chamber 22 arranged in sequence. Mixers are installed in both the magnetic coagulation reaction chamber 21 and the magnetic flocculation reaction chamber 22. The lift pump 121 is connected to the front end of the magnetic coagulation reaction chamber 21.

[0062] It also includes a second chemical dosing device 23 and a third chemical dosing device 24. The second chemical dosing device 23 is connected to the coagulant dosing port at the front end of the magnetic coagulation reaction chamber 21 for dosing coagulants, such as PAC, into the magnetic coagulation reaction chamber 21. The third chemical dosing device 24 is connected to the coagulant aid dosing port at the front end of the magnetic flocculation reaction chamber 22 for dosing coagulant aids, such as anionic PAM, into the magnetic flocculation reaction chamber 22.

[0063] Such as Figure 1 、 Figure 2 and Figure 4 As shown in

[0064] The above-mentioned target water area 5 for treatment can be a water ecological environment such as a river, a lake or a reservoir. Preferably, an aquatic plant coverage area is provided within the target water area 5 for treatment. Preferably, this aquatic plant coverage area includes a submerged plant area 51, a floating-leaved plant area 52 and an emergent plant area 53. Preferably, the submerged plants in the submerged plant area 51 can be one or a combination of Vallisneria natans, Hydrilla verticillata, Potamogeton maackianus, Myriophyllum verticillatum, Potamogeton crispus; the floating-leaved plants in the floating-leaved plant area 52 can be one or a combination of Nymphaea tetragona, Nymphoides peltatum, Nuphar pumilum; the emergent plants in the emergent plant area 53 are one or a combination of Phragmites australis, Miscanthus sacchariflorus, Thalia dealbata, Canna indica, Iris tectorum, Lythrum salicaria, Acorus calamus, Cyperus alternifolius, Cyperus papyrus, Pontederia cordata.

[0065] Further preferably, the coverage area of the aquatic plant coverage area should be greater than or equal to 30% of the area of the water area to be treated. The combination of magnetic coagulation magnetic separation bypass purification and in-situ aquatic plants can synergistically promote the long-term purification of water bodies, which is safer and more stable and reliable.

Claims

1. A long-acting water transparency improvement system, characterized in that It includes a pretreatment unit (1), a magnetic coagulation device (2), a disk separation device (3), and a magnetic medium recovery and recycling device (4) connected in sequence through pipelines; Among them, the water inlet end of the pretreatment unit (1) is connected to the target water area to be treated (5); The water outlet of the disk separation device (3) is connected back to the target water area to be treated (5), and the magnetic floc outlet is connected to the magnetic medium recovery and recycling device (4); The magnetic medium circulation discharge port of the magnetic medium recovery and recycling device (4) is connected to the magnetic coagulation device (2).

2. The long-acting water body transparency improvement system according to claim 1, wherein It further includes a cut-off device (6). The cut-off device (6) is arranged at the upstream incoming water of the target water area to be treated (5). The water inlet end of the pretreatment unit (1) is connected to the upstream section of the cut-off device (6), and the water outlet of the disk separation device (3) is connected back to the downstream section of the cut-off device (6).

3. The long-acting water body transparency improvement system according to claim 1, wherein The water inlet end of the pretreatment unit (1) is connected to the end of the target water area to be treated (5), and the water outlet of the disk separation device (3) is connected back to the front end of the target water area to be treated (5).

4. The long-acting water body transparency improvement system according to any one of claims 1 to 3, characterized in that, It further includes a sludge treatment unit (7). The sludge treatment unit (7) includes a sludge tank (71), a filtrate tank (72), a dehydrator (73), and a first chemical dosing device (74); The sludge outlet of the magnetic medium recovery and recycling device (4) is connected to the sludge tank (71). The sludge tank (71) is connected to the dehydrator (73) through a sludge pump (711). The liquid outlet of the dehydrator (73) is connected to the filtrate tank (72). The filtrate tank (72) is connected to the magnetic coagulation device (2) through a filtrate pump (721); The first chemical dosing device (74) is connected to the dehydrator (73).

5. The long-acting water body transparency improvement system according to claim 1, characterized in that, The pretreatment unit (1) includes a grille channel (11) and a collecting tank (12). The water inlet end of the grille channel (11) is connected to the target water area to be treated (5), and the water outlet end is connected to the collecting tank (12); A coarse grille (111) and a fine grille (112) are sequentially arranged in the grille channel (11). The collecting tank (12) is connected to the water inlet end of the magnetic coagulation device (2) through a lift pump (121).

6. The long-acting water body transparency improvement system according to claim 1, characterized in that, The magnetic coagulation device (2) includes a magnetic coagulation reaction chamber (21) and a magnetic flocculation reaction chamber (22) arranged in sequence; It further includes a second chemical dosing device (23) and a third chemical dosing device (24). The second chemical dosing device (23) is connected to the front end of the magnetic coagulation reaction chamber (21), and the third chemical dosing device (24) is connected to the front end of the magnetic flocculation reaction chamber (22).

7. The long-acting water body transparency improvement system according to claim 4, characterized in that, The magnetic medium recovery and recycling device (4) includes a high-speed disperser (41), a magnetic separation magnetic drum machine (42), and a magnetic medium mixing tank (43) connected to each other. The magnetic floc outlet of the disk separation device (3) is connected to the high-speed disperser (41). The magnetic medium mixing tank (43) is connected to the front end of the magnetic coagulation device (2) through a magnetic medium circulation pump (44).

8. The long-acting water body transparency improvement system according to claim 7, characterized in that The magnetic medium mixing tank (43) is also provided with a feeding port for adding magnetic medium.

9. The long-acting water body transparency improvement system according to any one of claims 1 to 3, characterized in that, An aquatic plant coverage area is provided in the target water area (5) to be treated, and the aquatic plant coverage area includes a submerged plant area (51), a floating-leaved plant area (52), and an emergent plant area (53).

10. The long-acting water body transparency improvement system according to claim 9, characterized in that The coverage area of the aquatic plant coverage area is 30% or more of the area of the target water area (5) to be treated.

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