Combined magnetic coagulation device

Abstract

The utility model provides a combined type magnetic coagulation device which comprises a coagulation reaction tank, a loading reaction tank, a flocculation reaction tank and a precipitation separation tank, the coagulation reaction tank, the loading reaction tank, the flocculation reaction tank and the precipitation separation tank are of an integrated structure, and the coagulation reaction tank, the loading reaction tank, the flocculation reaction tank and the precipitation separation tank are sequentially connected; a horizontal-flow type sedimentation area is arranged at the lower part of the sedimentation separation tank, and a concrete cushion layer and a mud scraper are arranged at the lower part of the horizontal-flow type sedimentation area. According to the utility model, the horizontal-flow sedimentation area is arranged in the sedimentation separation tank, and the concrete cushion layer and the sludge scraper are arranged in the horizontal-flow sedimentation area, so that sediments can be scraped into the sludge tank through the sludge scraper after being gathered on the upper part of the concrete cushion layer, and are pumped to the magnetic roller separator through the sludge pump, and the bottom of the tank is prevented from being scratched by a scraper; meanwhile, automatic dosing tanks are arranged on the coagulation reaction tank and the flocculation reaction tank, so that automatic dosing can be performed according to data of a flow meter, and the automation degree of the equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a combined magnetic coagulation device. Background Technology

[0002] Currently, with the increasing amount of garbage generated in people's lives, the amount of sewage and leachate produced is also increasing. This sewage needs to be treated and tested before it can be discharged into natural water bodies. Traditional sewage treatment mainly uses flocculants to cause impurities in the sewage to aggregate and settle, achieving solid-liquid separation. In addition, to accelerate the sedimentation rate of flocs, magnetic powder is added to the sewage, making the flocs magnetic, so that they settle quickly under the action of a magnetic field, achieving efficient solid-liquid separation and purifying water quality. Existing magnetic coagulation devices, such as the magnetic coagulation sewage treatment device disclosed in Chinese Patent Application No. 202321734677.9, are examples. The treatment device includes a housing with multiple support rods at the bottom. Inside the housing are a loading tank, a coagulation tank, a sludge tank, a flocculation tank, and a sedimentation tank. A shearing machine and a magnetic separation device are located at the top of the housing. The magnetic media recovery end of the magnetic separation device is connected to the loading tank. This device presents the following problems during use: First, the device has a sludge scraper assembly at the bottom of the sedimentation tank to scrape away sediment. During use, due to gravity, the scraper will sink and come into contact with the sedimentation tank, causing wear and tear on the sedimentation tank while removing sediment. Since the water pump is installed at the bottom of the tank, and the pipes need to pass through the bottom, the housing is mostly made of metal, which is difficult to repair after wear. In addition, the device lacks a dosing system, requiring manual dosing during use. This results in low automation and can easily lead to excessively high or low dosing ratios, affecting subsequent flocculation. Therefore, a combined magnetic coagulation device is needed. By setting a concrete bedding layer in the sedimentation tank, a collection trough can be formed to facilitate the collection of sediments and prevent the scraper from scratching the bottom of the tank. At the same time, an automatic dosing device can be configured to improve the automation level of the equipment. Utility Model Content

[0003] To address the aforementioned issues, this invention proposes a combined magnetic coagulation device. By setting a concrete cushion layer in the sedimentation tank, a collection trough can be formed to facilitate the collection of sediments while preventing the scraper from scratching the tank bottom. Simultaneously, an automatic dosing device is configured to improve the automation level of the equipment.

[0004] This utility model is achieved through the following technical solution: This utility model proposes a combined magnetic coagulation device, including: a coagulation reaction tank, a loading reaction tank, a flocculation reaction tank, and a sedimentation separation tank. The coagulation reaction tank, loading reaction tank, flocculation reaction tank, and sedimentation separation tank are integrated into one structure and are connected sequentially. The sedimentation separation tank has a horizontal flow sedimentation zone at its lower part. A concrete cushion and a sludge scraper are provided at the lower part of the horizontal flow sedimentation zone. The concrete cushion covers the bottom of the horizontal flow sedimentation zone, and the sludge scraper is located on the upper part of the concrete cushion. A sludge trough is provided on one side of the concrete cushion, and the lower part of the sludge scraper moves towards the sludge trough.

[0005] Furthermore, the coagulation reaction tank, loading reaction tank, and flocculation reaction tank are provided with a cover plate on the upper part. Multiple automatic dosing tanks are installed on the cover plate. Each automatic dosing tank includes a tank body, a metering pump, and a level gauge. The metering pump is installed on the outer side of the lower part of the tank body, and the inlet of the metering pump is connected to the lower part of the inner cavity of the tank body. The outlet of the metering pump is connected to the coagulation reaction tank, the loading reaction tank, and the flocculation reaction tank respectively. The level gauge is installed on the side of the automatic dosing tank.

[0006] Furthermore, the cover plate includes a magnetic separation assembly, which comprises a magnetic drum separator, a secondary magnetic separator, and a sludge pump. The sludge pump is installed in the sludge tank, and its outlet is connected to the magnetic drum separator via a high-speed shearing machine. The sludge outlet of the magnetic drum separator is connected to the secondary magnetic separator, and the outlet of the secondary magnetic separator is connected to the sludge tank. The magnetic powder outlets of both the magnetic drum separator and the secondary magnetic separator are connected to the loading reaction tank.

[0007] Furthermore, the cover plate is also equipped with a clean water tank, which is connected to the magnetic roller separator via a water pump and a flushing pipe. The end of the flushing pipe is equipped with a nozzle, which faces the magnetic roller on the magnetic roller separator.

[0008] Furthermore, the upper part of the sedimentation separation tank is provided with an inclined plate sedimentation zone, and a sedimentation inclined tube assembly is provided between the inclined plate sedimentation zone and the horizontal flow sedimentation zone. The sedimentation inclined tube assembly is provided with multiple hexagonal inclined tubes, and the hexagonal inclined tubes are at an angle of 55° to 65° with the horizontal plane.

[0009] Furthermore, the sedimentation separation tank is provided with an overflow weir at the top. The overflow weir is serrated, with a depth of 100mm to 120mm and a width of 80mm to 120mm.

[0010] Furthermore, a drive motor is provided at the top of the sedimentation separation tank. The drive motor is mounted on the top of the sedimentation separation tank via a support base. A synchronous pulley is provided on the output shaft of the drive motor, and the synchronous pulley is connected to the sludge scraper via a synchronous belt.

[0011] Furthermore, the support base includes a fixed plate and a movable plate. The fixed plate is fixedly connected to the upper part of the sedimentation separation tank. One end of the movable plate is hinged to the fixed plate, and the other end of the movable plate is connected to the fixed plate through a screw. The screw clamps the movable plate with two nuts, and the drive motor is mounted on the movable plate.

[0012] Furthermore, the coagulation reaction tank, loading reaction tank, and flocculation reaction tank are all equipped with a stirrer. The lower part of the stirrer is provided with at least two sets of stirring blades distributed along the axial direction of the stirring shaft. The inclination angle of the stirring blades is 45°, and the adjacent sets of stirring blades are staggered by 90° in the circumferential direction.

[0013] Furthermore, the coagulation reaction tank is equipped with a raw water inlet pipe, which is equipped with a flow control valve and a flow meter.

[0014] The beneficial effects of this utility model are as follows: By setting up a horizontal flow sedimentation zone in the sedimentation separation tank, and setting up a concrete cushion layer and a sludge scraper in the horizontal flow sedimentation zone, the sediment can be scraped into the sludge tank by the sludge scraper after it accumulates on the upper part of the concrete cushion layer, and then pumped into the magnetic drum separator by the sludge pump, thus avoiding the scraper scraping the bottom of the tank. At the same time, by setting up automatic dosing tanks on the coagulation reaction tank and the flocculation reaction tank, automatic dosing can be performed according to the data of the flow meter, thereby improving the automation level of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the sedimentation separation tank of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the support base of this utility model;

[0018] In the diagram: 1-Coagulation reaction tank, 2-Loading reaction tank, 3-Flocculation reaction tank, 4-Sedimentation separation tank, 5-Automatic dosing tank, 6-Drive motor, 7-Support base, 8-Magnetic separation component, 9-Agitator, 10-Flow control valve, 41-Inclined plate sedimentation zone, 42-Horizontal flow sedimentation zone, 43-Concrete cushion layer, 44-Sludge scraper, 45-Sludge tank, 46-Sedimentation inclined tube assembly, 47-Overflow weir, 51-Tank body, 52-Metering pump, 53-Level gauge, 71-Fixed plate, 72-Moving plate, 73-Screw, 81-Magnetic drum separator, 82-Secondary magnetic separator, 83-Sludge pump, 84-High-speed shear machine, 85-Clear water tank. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Throughout the description, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of the stated features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0022] like Figure 1 , Figure 2 , Figure 3 As shown, an embodiment of this utility model provides a combined magnetic coagulation device, including: a coagulation reaction tank 1, a loading reaction tank 2, a flocculation reaction tank 3, and a sedimentation separation tank 4. The coagulation reaction tank 1, the loading reaction tank 2, the flocculation reaction tank 3, and the sedimentation separation tank 4 are an integrated structure, and the coagulation reaction tank 1, the loading reaction tank 2, the flocculation reaction tank 3, and the sedimentation separation tank 4 are connected in sequence. The sedimentation separation tank 4 has a horizontal flow sedimentation zone 42 at its lower part, and a concrete cushion layer 43 and a sludge scraper 44 are provided at the lower part of the horizontal flow sedimentation zone 42. The concrete cushion layer 43 covers the bottom of the horizontal flow sedimentation zone 42, and the sludge scraper 44 is located on the upper part of the concrete cushion layer 43. A sludge trough 45 is provided on one side of the concrete cushion layer 43, and the lower part of the sludge scraper 44 moves towards the sludge trough 45.

[0023] The wastewater to be treated enters the coagulation reaction tank 1 through the raw water inlet pipe. Coagulants (such as polyaluminum chloride, polyacrylamide, etc.) are added to the coagulation reaction tank 1 through the automatic dosing tank 5 at the top of the tank. This causes suspended solids, colloids, and other impurities in the water to coagulate into larger particles. The wastewater in the coagulation reaction tank 1 then enters the loading reaction tank 2 by pumping or natural flow. Magnetic powder separated by the magnetic separation component 8 is then added, along with additional magnetic powder added through the automatic dosing tank 5 on the loading reaction tank 2. Under the action of the agitator 9, the magnetic powder and impurity particles under the action of the flocculant mutually adsorb each other, forming magnetic flocs. After the wastewater flows into the flocculation reaction tank 3, further agitation and flocculant addition continue, and then it flows into the sedimentation separation tank 4. In the sedimentation separation tank 4, the wastewater flow rate is slow, and under the action of magnetic force... This process causes flocculants to quickly aggregate and form sediment. The sediment passes through the sedimentation inclined tube assembly 46 and enters the horizontal flow sedimentation zone 42, falling onto the concrete cushion layer 43. Driven by the drive motor 6, the sprocket on the scraper 44 rotates, thereby driving the scraper on the scraper 44 to scrape the sediment on the concrete cushion layer 43 into the sludge tank 45 for collection. Then, the sediment is pumped to the high-speed shearing machine 84 by the sludge pump 83. After the high-speed shearing machine 84 crushes the sediment into sludge, it enters the magnetic drum separator 81. The magnetic drum sucks out the magnetic powder from the sludge, realizing the recycling of the magnetic powder. Then, after the secondary magnetic separator 82 further separates the magnetic powder, the sludge is discharged into the sludge tank, while the clear water in the sedimentation separation tank 4 flows out of the sedimentation separation tank 4 through the overflow weir 47, thus achieving the treatment of sewage.

[0024] The concrete cushion layer 43 can prevent the sludge scraper 44 from scraping the bottom of the pool. The concrete is easy to repair after wear, reducing maintenance difficulty and extending service life. It can also easily form a recessed sludge trough 45 on the side of the concrete cushion layer 43, which makes it easy for the sludge pump 83 to quickly suck up the sediment for treatment.

[0025] In one specific embodiment, the upper part of the coagulation reaction tank 1, the loading reaction tank 2, and the flocculation reaction tank 3 is provided with a cover plate, and multiple automatic dosing tanks 5 are installed on the cover plate. The automatic dosing tank 5 includes a tank body 51, a metering pump 52, and a level gauge 53. The metering pump 52 is installed on the outer side of the lower part of the tank body 51, and the inlet of the metering pump 52 is connected to the lower part of the inner cavity of the tank body 51. The outlet of the metering pump 52 is connected to the coagulation reaction tank 1, the loading reaction tank 2, and the flocculation reaction tank 3 respectively. The level gauge 53 is installed on the side of the automatic dosing tank 5. The automatic dosing tank 5 can control the dosing amount according to the flow meter on the raw water inlet pipe. The metering pump 52 adopts a diaphragm metering pump, which can reduce the corrosion of the metering pump 52 by the agent. The level gauge 53 adopts a contact level gauge, which has two electrode plates that extend into the tank body 51. When the liquid level in the tank body 51 is higher than the level gauge 53, the detection circuit is turned on. When the liquid level in the tank body 51 is lower than the level gauge 53, the detection circuit is turned off, thereby determining whether the chemical solution in the tank body 51 is sufficient. The automatic dosing tank 5 can improve the automation level of the equipment, reduce the labor input, and improve the effect of magnetic coagulation.

[0026] In a preferred embodiment, such as Figure 1 As shown, the cover plate has a magnetic separation assembly 8, which includes a magnetic drum separator 81, a secondary magnetic separator 82, and a sludge pump 83. The sludge pump 83 is installed in the sludge tank 45. The outlet of the sludge pump 83 is connected to the magnetic drum separator 81 through a high-speed shear machine 84. The sludge outlet of the magnetic drum separator 81 is connected to the secondary magnetic separator 82. The outlet of the secondary magnetic separator 82 is connected to the sludge tank. The magnetic powder outlets of both the magnetic drum separator 81 and the secondary magnetic separator 82 are connected to the loading reaction tank 2. The magnetic separation assembly 8 adopts an existing mature magnetic separation assembly. After the sludge pump 83 sucks in the flocculent, it is broken up by the high-speed shear machine 84, so that the magnetic powder can be magnetically attracted out. After being separated by the magnetic drum separator 81 and the secondary magnetic separator 82, it is separated from other sediments, realizing the recycling of magnetic powder.

[0027] Specifically, a clean water tank 85 is also provided on the cover plate. The clean water tank 85 is connected to the magnetic drum separator 81 through a water pump and a flushing pipe. The end of the flushing pipe is provided with a nozzle, and the nozzle faces the magnetic drum on the magnetic drum separator 81. It can flush the magnetic drum separator 81, improve the magnetic separation efficiency of the magnetic drum separator 81, and the clean water tank 85 can settle the clean water separated from the separation tank 4. A water quality monitoring device can also be added to the clean water tank 85 to monitor the water quality of the cleaning water.

[0028] In a specific embodiment, such as Figure 2As shown, the upper part of the sedimentation separation tank 4 is provided with an inclined plate sedimentation zone 41. Between the inclined plate sedimentation zone 41 and the horizontal flow sedimentation zone 42, there is a sedimentation inclined tube assembly 46. The sedimentation inclined tube assembly 46 is provided with multiple hexagonal inclined tubes, and the hexagonal inclined tubes are at an angle of 55° to 65° with the horizontal plane. The sedimentation inclined tube assembly 46 can increase the sedimentation area and improve the sedimentation efficiency of the sedimentation separation tank 4.

[0029] Preferably, the sedimentation separation tank 4 is provided with an overflow weir 47 at the top. The overflow weir 47 is serrated, with a depth of 100mm to 120mm and a width of 80mm to 120mm. The clear water separated in the sedimentation separation tank 4 flows out through the overflow weir 47, realizing solid-liquid separation.

[0030] Specifically, a drive motor 6 is installed at the top of the sedimentation separation tank 4. The drive motor 6 is mounted on the top of the sedimentation separation tank 4 via a support base 7. A synchronous pulley is installed on the output shaft of the drive motor 6, and the synchronous pulley is connected to the sludge scraper 44 via a synchronous belt. This drives the sludge scraper 44 to rotate, thereby scraping off the sediment on the top of the concrete cushion layer 43.

[0031] Specifically, such as Figure 3 As shown, the support base 7 includes a fixed plate 71 and a movable plate 72. The fixed plate 71 is fixedly connected to the upper part of the sedimentation separation tank 4. One end of the movable plate 72 is hinged to the fixed plate 71, and the other end of the movable plate 72 is connected to the fixed plate 71 through a screw 73. The screw 73 clamps the movable plate 72 with two nuts. The drive motor 6 is installed on the movable plate 72, and the height of the drive motor 6 can be adjusted within a certain range to achieve a suitable tension of the synchronous belt.

[0032] Specifically, each of the coagulation reaction tank 1, the loading reaction tank 2, and the flocculation reaction tank 3 is equipped with an agitator 9. The agitator 9 has at least two sets of agitator blades distributed axially along the agitator shaft at its lower part. The agitator blades are inclined at an angle of 45°, and adjacent sets of agitator blades are staggered by 90° in the circumferential direction. This ensures uniform mixing of the reagents and improves the wastewater treatment effect.

[0033] In one specific embodiment, the coagulation reaction tank 1 is equipped with a raw water inlet pipe, and the raw water inlet pipe is equipped with a flow control valve 10 and a flow meter to facilitate flow control and flow data collection, and to facilitate automatic dosing based on flow rate.

[0034] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A combined magnetic coagulation device, characterized in that, include: The coagulation reaction tank (1), loading reaction tank (2), flocculation reaction tank (3), and sedimentation separation tank (4) are integrated into one structure and are connected in sequence. The sedimentation separation tank (4) has a horizontal flow sedimentation zone (42) at the bottom. The horizontal flow sedimentation zone (42) has a concrete cushion layer (43) and a sludge scraper (44) at the bottom. The concrete cushion layer (43) covers the bottom of the horizontal flow sedimentation zone (42). The sludge scraper (44) is located on the top of the concrete cushion layer (43). A sludge trough (45) is provided on one side of the concrete cushion layer (43). The lower part of the sludge scraper (44) moves towards the sludge trough (45).

2. The combined magnetic coagulation device according to claim 1, characterized in that, The coagulation reaction tank (1), loading reaction tank (2), and flocculation reaction tank (3) are provided with a cover plate on the upper part. Multiple automatic dosing tanks (5) are installed on the cover plate. Each automatic dosing tank (5) includes a tank body (51), a metering pump (52), and a level gauge (53). The metering pump (52) is installed on the outer side of the lower part of the tank body (51), and the inlet of the metering pump (52) is connected to the lower part of the inner cavity of the tank body (51). The outlet of the metering pump (52) is connected to the coagulation reaction tank (1), the loading reaction tank (2), and the flocculation reaction tank (3) respectively. The level gauge (53) is installed on the side of the automatic dosing tank (5).

3. The combined magnetic coagulation device according to claim 2, characterized in that, The cover plate has a magnetic separation assembly (8), which includes a magnetic drum separator (81), a secondary magnetic separator (82), and a sludge pump (83). The sludge pump (83) is installed in the sludge tank (45). The outlet of the sludge pump (83) is connected to the magnetic drum separator (81) through a high-speed shear machine (84). The sludge outlet of the magnetic drum separator (81) is connected to the secondary magnetic separator (82). The outlet of the secondary magnetic separator (82) is connected to the sludge tank. The magnetic powder outlets of the magnetic drum separator (81) and the secondary magnetic separator (82) are both connected to the loading reaction tank (2).

4. A combined magnetic coagulation device according to claim 3, characterized in that, The cover plate is also provided with a clean water tank (85), which is connected to the magnetic roller separator (81) through a water pump and a flushing pipe. The end of the flushing pipe is provided with a nozzle, which faces the magnetic roller on the magnetic roller separator (81).

5. A combined magnetic coagulation device according to claim 1, characterized in that, The sedimentation separation tank (4) is provided with an inclined plate sedimentation zone (41) at the top. An inclined plate sedimentation zone (41) and a horizontal flow sedimentation zone (42) are provided with a sedimentation inclined tube assembly (46). The sedimentation inclined tube assembly (46) is provided with multiple hexagonal inclined tubes, and the hexagonal inclined tubes are at an angle of 55° to 65° with the horizontal plane.

6. A combined magnetic coagulation device according to claim 5, characterized in that, The sedimentation separation tank (4) is provided with an overflow weir (47) at the top. The overflow weir (47) is serrated, with a depth of 100mm to 120mm and a width of 80mm to 120mm.

7. A combined magnetic coagulation device according to claim 1, characterized in that, The sedimentation separation tank (4) is equipped with a drive motor (6) at the top. The drive motor (6) is installed on the top of the sedimentation separation tank (4) through a support base (7). The output shaft of the drive motor (6) is equipped with a synchronous pulley, which is connected to the sludge scraper (44) through a synchronous belt.

8. A combined magnetic coagulation device according to claim 7, characterized in that, The support base (7) includes a fixed plate (71) and a movable plate (72). The fixed plate (71) is fixedly connected to the upper part of the sedimentation separation tank (4). One end of the movable plate (72) is hinged to the fixed plate (71), and the other end of the movable plate (72) is connected to the fixed plate (71) through a screw (73). The screw (73) clamps the movable plate (72) with two nuts. The drive motor (6) is mounted on the movable plate (72).

9. A combined magnetic coagulation device according to claim 1, characterized in that, The coagulation reaction tank (1), loading reaction tank (2), and flocculation reaction tank (3) are all equipped with a stirrer (9). The stirrer (9) has at least two sets of stirring blades distributed along the axial direction of the stirring shaft at its lower part. The inclination angle of the stirring blades is 45°, and the adjacent two sets of stirring blades are staggered by 90° in the circumferential direction.

10. A combined magnetic coagulation device according to claim 1, characterized in that, The coagulation reaction tank (1) is equipped with a raw water inlet pipe, and the raw water inlet pipe is equipped with a flow control valve (10) and a flow meter.

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