Device for improving water quality of silt dam

Abstract

The utility model discloses a water quality improvement device for a silt dam, which comprises a sedimentation tank, a raw water tank, a pretreatment system, a reverse osmosis desalination system and a pure water tank, and the sedimentation tank is connected with the silt dam through a submersible pump; the raw water tank is connected with the sedimentation tank; the pretreatment system is connected with the raw water tank; the reverse osmosis desalination system is connected with the pretreatment system; the pure water tank is connected with the reverse osmosis desalination system. According to the device, the restriction problem that the silt dam water is high in salt content and poor in water quality and cannot be directly used for rural production and domestic water is solved, the desalting rate of the device is larger than or equal to 90%, the conductivity of the effluent water quality is smaller than or equal to 483us / CM, barium, magnesium, calcium and manganese are basically removed, and the requirement of the water quality basic control project limit value of the rural production and domestic water can be completely met; the sedimentation tank is provided with a deep tank and a shallow tank, so that the raw water pumped from the silt dam can be subjected to multi-stage sufficient sedimentation, and the service lives of the subsequent pretreatment system and the reverse osmosis desalination system can be prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of water quality improvement technology, specifically relating to a water quality improvement device for silt-retaining dams. Background Technology

[0002] Silt-retaining dams are important soil and water conservation projects on the Loess Plateau, primarily functioning to trap sediment. Their role varies at different stages of operation. Given the concentrated rainfall during the flood season on the Loess Plateau, silt-retaining dams and their systems are used in small watershed management to impound floodwaters for rational regulation and utilization, addressing rural production and domestic water needs, developing aquaculture, and improving water resource utilization efficiency. However, due to the influence of topography, silt deposits, and the original gully gradient, the groundwater runoff slope of silt-retaining dams decreases, groundwater drainage is impeded, and water levels rise. Evaporation causes soluble salts in the silt to rise through the capillary action of groundwater, leading to salinization and poor water quality in the silt-retaining dam water, making it unsuitable for direct use in rural production and domestic water supply. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a water quality improvement device for silt-retaining dams.

[0004] The water quality improvement device for silt-retaining dams of this utility model includes: a sedimentation tank connected to the silt-retaining dam via a submersible pump; the sedimentation tank comprising a deep pool and a shallow pool separated by a movable baffle with an outlet in the baffle; a raw water tank connected to the sedimentation tank; a pretreatment system connected to the raw water tank; a reverse osmosis desalination system connected to the pretreatment system; and a pure water tank connected to the reverse osmosis desalination system.

[0005] A water pump is installed at the top of the shallow pool of the sedimentation tank. The bottom of the water pump is connected to a water pumping pipe, which extends into the shallow pool. A raw water pipe is installed on one side of the water pump and is connected to a raw water tank.

[0006] Both the deep pool and the shallow pool have slopes at the bottom, and the slopes are connected to the sludge outlet, which is equipped with a valve.

[0007] The bottom of the deep pool and the shallow pool are flat. Scrapers are movably installed in both the deep pool and the shallow pool. The top of the scraper is connected to the motor through a screw. Multiple water-permeable holes are provided on the upper part of the scraper. A shovel and a cutter are provided on the bottom of the scraper. Mud outlets are opened on both sides of the bottom of the deep pool, and valves are provided at the mud outlets.

[0008] The top of the scraper is provided with a threaded hole that mates with the lead screw. The scraper and the cutter are perpendicular to each other. The scraper is installed on the bottom side of the scraper, and the cutter is located above the scraper. The cutter is installed vertically on the lower side of the scraper, and multiple scrapers and multiple cutters are arranged alternately.

[0009] The top of the movable baffle is connected to a linear motor via a connecting rod. The linear motor is installed on the top of the sedimentation tank. Vertical grooves are symmetrically provided on the inner wall of the sedimentation tank at the positions where the movable baffle is installed. The two sides of the movable baffle are located in the grooves, and the movable baffle can move up and down along the grooves.

[0010] The movable baffle has a water outlet in the middle, and the two ends of the water outlet are connected to the deep pool and the shallow pool respectively. The position of the water outlet is higher than the bottom of the shallow pool.

[0011] The pretreatment system includes a multi-media filter, an activated carbon filter, and a softening device connected in sequence. The softening device is connected to the scale inhibitor dosing system.

[0012] The reverse osmosis desalination system includes a precision filter connected to a softening device, a vertical multistage centrifugal pump connected to a reverse osmosis pure water unit, and a reverse osmosis pure water unit connected to a pure water tank.

[0013] The reverse osmosis pure water unit is also connected to a control system, which uses a programmable controller.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model's silt-retention dam water quality improvement device, after sedimentation, passes the silt-retention dam water through multi-media and activated carbon filtration, softening equipment to remove impurities such as organic matter, suspended solids, and heavy metal ions, and then through a reverse osmosis desalination system to treat dissolved salts and organic matter with a molecular weight greater than 100, separating them from water molecules to purify the water quality. This solves the problem of high salt content and poor water quality in silt-retention dam water, making it unsuitable for direct use in rural production and domestic water use. This device has a desalination rate of ≥90%, an effluent conductivity of ≤483 μS / CM, and essentially removes barium, magnesium, calcium, and manganese, fully meeting the basic water quality control limits for rural production and domestic water use. The control system of this device can monitor the conductivity of the raw water effluent in real time, enabling real-time activation of the treatment device according to seasonal changes in salinity in the silt-retention dam. It also features automatic start / stop operation via mobile phone, making it convenient, quick, and easy to operate, suitable for the simple and visual requirements of rural residents.

[0016] 2. The sedimentation tank of this utility model is equipped with a deep pool and a shallow pool, which can carry out multi-stage sedimentation of the raw water pumped from the silt-retaining dam, thereby extending the service life of the subsequent pretreatment system and reverse osmosis desalination system; by setting scrapers and movable baffles, the sediment in the deep pool and shallow pool can be quickly cleaned away. Attached Figure Description

[0017] Figure 1 This is a system diagram of the silt-retaining dam water quality improvement device of this utility model.

[0018] Figure 2 This is a schematic diagram of the sedimentation tank of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the sedimentation tank of this utility model.

[0020] Figure 4 This is a schematic diagram of the scraper structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the water pump of this utility model.

[0022] Figure label:

[0023] 1. Silt-retaining dam; 101. Submersible pump; 2. Sedimentation tank; 21. Deep pool; 22. Shallow pool; 23. Water pump; 231. Raw water pipe; 232. Pumping pipe; 24. Motor; 241. Screw; 25. Sludge outlet; 26. Movable baffle; 261. Water outlet; 27. Scraper; 271. Cutter; 272. Water permeable hole; 273. Slope; 28. Raw water tank; 3. Raw water pump; 301. Pretreatment system; 4. Multi-media filter; 401. Activated carbon filter; 402. Softening equipment; 403. Scale inhibitor dosing system; 404. Reverse osmosis desalination system; 5. Precision filter; 501. Vertical multi-stage centrifugal pump; 502. Reverse osmosis pure water unit; 503. Control system; 504. Pure water tank; 6. Drainage pipe; 7. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] like Figures 1-5 As shown, the water quality improvement device for silt-retaining dams of this utility model includes a sedimentation tank 2, a raw water tank 3, a pretreatment system 4, a reverse osmosis desalination system 5, and a pure water tank 6. The sedimentation tank 2 is connected to the silt-retaining dam 1 via a submersible pump 101. The sedimentation tank 2 is used to settle the turbid water pumped from the silt-retaining dam 1. The raw water tank 3 is connected to the sedimentation tank 2, and the raw water after sedimentation in the sedimentation tank 2 is pumped to the raw water tank 3. The pretreatment system 4 is connected to the raw water tank 3, and the pretreatment system 4 can perform preliminary filtration of the raw water, removing odors, heavy metal ions, organic carcinogens, barium, magnesium, calcium, manganese, etc. The reverse osmosis desalination system 5 is connected to the pretreatment system 4, and the reverse osmosis desalination system 5 can remove soluble impurities, most ions, SiO2, etc. from the raw water, significantly reducing TDS. The pure water tank 6 is connected to the reverse osmosis desalination system 5.

[0026] like Figure 3As shown, a water pump 23 is installed at the top of the shallow pool 22 of the sedimentation tank 2. The bottom of the water pump 23 is connected to a water suction pipe 232, which extends into the shallow pool 22. A raw water pipe 231 is installed on one side of the water pump 23, and the raw water pipe 231 is connected to the raw water tank 3. The water pump draws raw water from the shallow pool and sends it to the raw water tank through the raw water pipe.

[0027] Sedimentation tank 2 includes a deep tank 21 and a shallow tank 22, which are separated by a movable baffle 26. The movable baffle 26 has an outlet 261. The bottoms of the deep tank 21 and the shallow tank 22 have two structures: one with a sloping bottom 28, and the other with a flat bottom, as shown below. Figure 5 As shown, when both the deep pool 21 and the shallow pool 22 have slopes 28 at their bottoms, the slope surface of the slopes 28 is connected to the sludge outlet 25, and a valve is installed at the sludge outlet 25. The slopes 28 allow impurities in the raw water to settle and gradually accumulate at the sludge outlet 25 along the slopes 28, thus facilitating sedimentation and discharge.

[0028] like Figure 3 As shown, when the bottoms of the deep pool 21 and the shallow pool 22 are flat, scrapers 27 are movably installed in both the deep pool 21 and the shallow pool 22. The scrapers 27 can scrape the sediment at the bottom of the sedimentation tank 2 to the sludge outlet 25 for discharge. Sludge outlets 25 are opened on both sides of the bottom of the deep pool 21, and valves are provided at the sludge outlets 25.

[0029] A lead screw 241 is installed across the top of sedimentation tank 2, spanning the deep tank 21 and the shallow tank 22. One end of the lead screw 241 is connected to a motor 24. The top of scraper 27 has a threaded hole that mates with the lead screw 241. The top of scraper 27 is connected to the motor 24 via the lead screw 241. When the output shaft of the motor 24 rotates, it drives the lead screw 241 to rotate, thereby moving scraper 27 in the deep tank 21 and the shallow tank 22 to perform sludge scraping. The scraper 27 in the deep tank 21 is longer than the scraper 27 in the shallow tank 22, and the bottom of scraper 27 contacts the bottom of either the deep tank 21 or the shallow tank 22.

[0030] like Figure 4 As shown, the scraper 27 has a shovel 271 and a cutter 272 at its bottom. The shovel 271 and the cutter 272 are perpendicular to each other. The shovel 271 is installed on the bottom side of the scraper 27, and the cutter 272 is located above the shovel 271 and is vertically installed on the lower side of the scraper 27. Multiple shovels 271 and multiple cutters 272 are arranged alternately. The shovel 271 is used to scoop up the sediment at the bottom of the sedimentation tank 2. If the sediment is thick, the shovel 272 may not be able to scoop up the sediment smoothly. The cutter 272 then assists in vertically chopping or cutting the sediment before the shovel 271 scoops it up, thus quickly scraping the sediment to the sludge outlet 25 for discharge.

[0031] The upper part of the scraper 27 is provided with multiple water permeable holes 273, and a filter screen is provided in the water permeable holes 273. The water permeable holes 273 are designed so that when the water level is higher than the position of the water permeable holes 273, the water flows through the water permeable holes 273 to enter the other side.

[0032] like Figure 3 As shown, the top of the movable baffle 26 is connected to a linear motor (not shown) via a connecting rod. The linear motor is installed on the top of the sedimentation tank 2. Vertical grooves are symmetrically provided on the inner wall of the sedimentation tank 2 at the positions where the movable baffle 26 is installed. The two sides of the movable baffle 26 are located in the grooves, and the movable baffle 26 can move up and down along the grooves.

[0033] A water outlet 261 is provided in the middle of the movable baffle 26. The two ends of the water outlet 261 are connected to the deep pool 21 and the shallow pool 22, respectively. The position of the water outlet 261 is higher than the bottom of the shallow pool 22, and a one-way valve is provided at the water outlet 261. The position of the water permeable hole 273 of the scraper in the deep pool 21 is higher than the position of the water outlet 261 of the movable baffle 26. The lowest position of the water permeable hole of the scraper in the shallow pool is lower than the position of the water outlet.

[0034] When the bottom of the movable baffle 26 is in close contact with the bottom of the shallow pool 22, the settled water entering the deep pool 21 will enter the shallow pool 22 through the outlet 261. Since the outlet 261 is located in the middle of the movable baffle 26, the water entering the shallow pool 22 will undergo further sedimentation. After a certain period of sedimentation, it will be pumped to the raw water tank 3. After working for a period of time, a certain thickness of sediment will accumulate in the shallow pool 22 and the deep pool 21. When cleaning the sediment in the shallow pool 22, the movable baffle 26 needs to be pulled upward a certain distance by the linear motor to form an opening between the bottom of the shallow pool 22 and the movable baffle 26. The motor 24 is started, and the motor 24 drives the lead screw 241 to rotate, thereby driving the two scrapers 27 to move. When the scrapers 27 in the shallow pool 22 move, they sweep the sediment at the bottom of the shallow pool 22 into the deep pool 21. During the back-and-forth movement of the scrapers 27 in the deep pool 21, the sediment at the bottom of the deep pool 21 is discharged from the two mud outlets 25.

[0035] The specific working process of the sedimentation tank is as follows: First, the raw water is sent into the sedimentation tank 2 from the inlet at the top of the sedimentation tank 2 through the submersible pump 101 with filter screen in the siltation dam 1. At this time, the scraper 27 can be located at the left third of the deep pool 21. When the water has entered more than half of the deep pool 21, the water intake is stopped, and the raw water settles in the deep pool 21 for a period of time. Then, the water continues to enter along the inner wall of the deep pool 21. When the water on the right side of the scraper 27 exceeds the water permeable hole 273 on the scraper 27, the water flows through the water permeable hole 273 and enters the left side of the scraper 27, and continues to settle on the left side. When the water volume on the left side of the scraper 27 in the deep pool 21 exceeds the water outlet 261 in the movable baffle 26, the water flows into the shallow pool 22 and settles for a period of time. When the water flow exceeds the water permeable hole 273 of the scraper 27 in the shallow pool 22, it enters the left side of the scraper 27. After settling for a period of time, the water is pumped out by the water pump 23 to the raw water tank 3. Water entering the shallow pool 22 can also be pumped directly to the original water tank 3 without settling. When the sediment in the deep pool 21 and the shallow pool 22 reaches a certain thickness, it is then scraped off with scraper 27.

[0036] The pretreatment system 4 includes a multi-media filter 401, an activated carbon filter 402, and a softening device 403 connected in sequence. The softening device 403 is connected to the scale inhibitor dosing system 404.

[0037] The multi-media filter 401 removes suspended solids, organic matter, colloids, silt and other impurities from water to purify the water.

[0038] Activated carbon filter 402 removes residual chlorine, organic matter, suspended solids, heavy metal ions and other impurities from water, and can effectively reduce water color and remove odors.

[0039] The 403 water softening equipment softens the raw water, preventing substances such as calcium carbonate, magnesium carbonate, calcium sulfate, and magnesium sulfate from precipitating on the reverse osmosis membrane surface and extending the service life of the reverse osmosis membrane.

[0040] The reverse osmosis desalination system 5 includes a precision filter 501 connected to a softening device 403, a vertical multistage centrifugal pump 502 connected to a reverse osmosis pure water unit 503, and a pure water tank 6 connected to the reverse osmosis pure water unit 503. The vertical multistage centrifugal pump 502 is used to meet the water flow rate and operating pressure entering the reverse osmosis pure water unit 503.

[0041] The reverse osmosis pure water unit 503 is also connected to the control system 504. The control system 504 adopts a programmable controller and has two operating modes: manual operation and automatic operation. In the automatic operation mode, the water level controller in the pure water tank 6 controls the working status of its related systems and protects the power equipment in the system.

[0042] This utility model is equipped with water shortage and overpressure protection. When the water supply is insufficient and the water pressure is lower than the allowable value, the control system 504 controls the reverse osmosis desalination system 5 to automatically shut down, so as to avoid damage to the high-pressure pump due to the low water supply pressure. When the outlet pressure of the vertical multistage centrifugal pump 502 is higher than the maximum allowable value, the control system 504 controls the reverse osmosis desalination system 5 to automatically shut down. After the operator solves the problem, the system can be restarted, so as to avoid damage to the high-pressure pump, membrane and pressure vessel due to the high operating pressure.

[0043] To protect the service life of the reverse osmosis membrane, an antiscalant dosing system 404 is added at the front end of the reverse osmosis desalination system 5. This delays the precipitation of calcium and magnesium ions in the water and the scaling on the membrane surface, reduces the impact on the membrane, and extends the service life of the membrane.

[0044] The scale inhibitor dosing system 404 includes a dosing pump and a dosing tank.

[0045] The dosing pump and the vertical multistage centrifugal pump 502 are linked. When the reverse osmosis desalination system 5 is started, the dosing pump automatically adds chemicals. When the reverse osmosis desalination system 5 is stopped, the dosing pump automatically shuts down.

[0046] The operation and backwashing of the multi-media filter 401, activated carbon filter 402, and softening equipment 403 are all automatically controlled.

[0047] The control system is connected to the conductivity meter, which can monitor the conductivity of raw water in real time. The conductivity parameter is displayed on the panel and is centrally located on the control box of the control system 504. The equipment will start automatically when the conductivity is greater than a certain value. The mobile app can monitor the conductivity of raw water in real time and start the equipment switch in real time.

[0048] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A water quality improvement device for silt-retaining dams, characterized in that, include: A sedimentation tank is connected to a silt-retaining dam via a submersible pump. The sedimentation tank includes a deep pool and a shallow pool, which are separated by a movable baffle with an outlet in the movable baffle. Raw water tank, which is connected to sedimentation tank; A pretreatment system, which is connected to the raw water tank; A reverse osmosis desalination system, which is connected to a pretreatment system; A pure water tank, which is connected to the reverse osmosis desalination system.

2. The silt-retention dam water quality improvement device according to claim 1, characterized in that, A water pump is installed at the top of the shallow pool of the sedimentation tank. The bottom of the water pump is connected to a water pumping pipe that extends into the shallow pool. A raw water pipe is installed on one side of the water pump and is connected to a raw water tank.

3. The silt-retention dam water quality improvement device according to claim 1, characterized in that, Both the deep pool and the shallow pool have slopes at the bottom, and the slopes are connected to the mud outlet, which is equipped with a valve.

4. The water quality improvement device for silt-retaining dams according to claim 1, characterized in that, The bottom of the deep pool and the shallow pool are flat. Scrapers are movably installed in both the deep pool and the shallow pool. The top of the scraper is connected to the motor through a screw. Multiple water-permeable holes are provided on the upper part of the scraper. A shovel and a cutter are provided on the bottom of the scraper. Mud outlets are opened on both sides of the bottom of the deep pool, and valves are provided at the mud outlets.

5. The silt-retention dam water quality improvement device according to claim 4, characterized in that, The top of the scraper is provided with a threaded hole that mates with the lead screw. The scraper and the cutter are perpendicular to each other. The scraper is installed on the bottom side of the scraper, and the cutter is located above the scraper. The cutter is installed vertically on the lower side of the scraper, and multiple scrapers and multiple cutters are arranged alternately.

6. The water quality improvement device for silt-retaining dams according to claim 1, characterized in that, The inner wall of the sedimentation tank has vertical grooves symmetrically provided at the positions where the movable baffles are installed. The two sides of the movable baffles are located in the grooves, and the movable baffles can move up and down along the grooves.

7. The silt-retention dam water quality improvement device according to claim 6, characterized in that, The movable baffle has a water outlet in the middle, and the two ends of the water outlet are connected to the deep pool and the shallow pool respectively. The position of the water outlet is higher than the bottom of the shallow pool.

8. The silt-retention dam water quality improvement device according to claim 1, characterized in that, The pretreatment system includes a multi-media filter, an activated carbon filter, and a softening device connected in sequence. The softening device is connected to the scale inhibitor dosing system.

9. The water quality improvement device for silt-retaining dams according to claim 8, characterized in that, The reverse osmosis desalination system includes a precision filter connected to a softening device, a vertical multistage centrifugal pump connected to a reverse osmosis pure water unit, and a reverse osmosis pure water unit connected to a pure water tank.

10. The water quality improvement device for silt-retaining dams according to claim 9, characterized in that, The reverse osmosis pure water unit is also connected to a control system, which uses a programmable controller.

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