Sewage treatment apparatus and method

Abstract

The application discloses sewage treatment equipment and a method thereof, and relates to the technical field of sewage treatment. The sewage treatment equipment comprises an inner cylinder, a middle cylinder and an outer cylinder. The inner cylinder is internally provided with a rapid reaction zone with openings at the top and the bottom. The middle cylinder is sleeved outside the inner cylinder, and a slow reaction zone with an opening at the bottom is further arranged between the middle cylinder and the inner cylinder. The outer cylinder is sleeved outside the middle cylinder, the bottom of the outer cylinder is closed, and a sedimentation zone is further arranged between the outer cylinder and the middle cylinder. The sewage treatment equipment is internally reasonably designed with the rapid reaction zone, the slow reaction zone and the sedimentation zone, so that suspended particles and pollutants to be treated can fully and completely react with added reaction reagents to form larger agglomerates, which can not only reduce the floor area of the sewage treatment equipment, but also reduce the construction cost of the sewage treatment equipment.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, specifically to a wastewater treatment device and method. Background Technology

[0002] Wastewater from many industrial and mining activities often contains harmful substances such as arsenic and fluoride. Efficiently and quickly treating wastewater containing fluoride and arsenic is challenging because fluoride and arsenic are common crustal elements, soluble in groundwater, and accumulate in water bodies, posing potential threats to the environment and human health. Common methods for treating fluoride and arsenic wastewater include adsorption methods, ion exchange methods, advanced oxidation methods, biological treatment, and deep well discharge. Chemical precipitation-coagulation, as a type of adsorption method, removes pollutants physically. Compared to biochemical methods such as ion exchange, advanced oxidation, and biological treatment, its principle is simple and operation is convenient, making it a preferred technology for wastewater treatment in various industries, and it is also widely used in treating arsenic and fluoride-containing wastewater. Chemical precipitation-coagulation requires coagulation sedimentation tanks. Commonly used coagulation sedimentation tanks in wastewater treatment plants include mechanical coagulation tanks, static coagulation tanks, sedimentation tanks, inclined plate sedimentation tanks, and centrifugal sedimentation tanks. Mechanical coagulation tanks often use mechanical stirring devices to promote the combination of solid particles and chemical coagulants in the wastewater, forming larger aggregates that facilitate subsequent gravity settling. However, this method has several drawbacks, such as expensive flocculation equipment, high construction and operating costs, and insufficient reaction intensity due to short-circuiting and unstable water flow during operation, poor floc settling performance, and low sludge utilization in the flocculation reaction. Static coagulation tanks and sedimentation tanks generally do not have mechanical stirring devices; instead, they rely on hydraulic impact to form aggregates of solid particles and coagulants. Hydrostatic pressure and load then cause the coagulated aggregates to settle within the tank. This method often suffers from incomplete coagulation, resulting in low pollutant removal efficiency. Inclined plate sedimentation tanks use inclined plates to increase the settling velocity of solid particles in wastewater, while centrifugal sedimentation tanks utilize rotational force to separate solid particles in water. Both methods offer higher sedimentation efficiency compared to gravity settling, but they are often accompanied by higher construction and operating costs. Unless there are stringent requirements for suspended solids in the effluent, these methods are rarely used. The coagulation sedimentation tanks described above often separate the reaction zone from the sedimentation zone, which further increases the construction cost of the structure (i.e., the coagulation sedimentation tank). Therefore, there is still significant room for improvement in traditional coagulation sedimentation tanks. Summary of the Invention

[0003] The purpose of this application is to provide a wastewater treatment device and method that can at least solve one of the problems of traditional coagulation sedimentation tanks, such as large footprint, high construction and operation costs, and difficult operation, management and maintenance, as well as the difficulty and high cost of treating fluoride and arsenic-containing wastewater.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] In a first aspect, this application proposes a wastewater treatment device, which includes:

[0006] The inner cylinder has a rapid reaction zone with openings at both the top and bottom.

[0007] An intermediate cylinder is fitted over the outer part of the inner cylinder, and a slow reaction zone with a bottom opening is provided between the intermediate cylinder and the inner cylinder.

[0008] The outer cylinder is fitted over the middle cylinder, the bottom of the outer cylinder is closed, and a settling zone is provided between the outer cylinder and the middle cylinder.

[0009] As a specific embodiment of the technical solution in this application, the top height of the intermediate cylinder is greater than the top height of the inner cylinder; the top height of the intermediate cylinder is greater than or equal to the top height of the outer cylinder.

[0010] As a specific solution in this application, it also includes a water inlet device, which is at least used to inject wastewater into the rapid reaction zone; the water inlet device includes:

[0011] Inlet pump;

[0012] The water inlet pipe is connected at one end to the output end of the water inlet pump and at the other end to the rapid reaction zone.

[0013] As a specific solution in this application, the water inlet device is further used to inject reaction agents into the rapid reaction zone; the water inlet device also includes:

[0014] Dosing tank;

[0015] The metering pump has its input end connected to the dosing tank and its output end connected to the water inlet pipe.

[0016] As a specific solution in this application, the water inlet device further includes a vacuum breaking tube, one end of which is connected to the water inlet pipe and the other end of which is connected to the atmosphere.

[0017] As a specific solution in this application, it further includes a water outlet structure, which is at least used for discharging water from the settling zone out of the outer cylinder; the water outlet structure includes an opening disposed at the top of the outer cylinder; or the water outlet structure includes:

[0018] An overflow weir channel is provided on the inner wall of the outer cylinder;

[0019] The outlet pipe is connected to the overflow weir.

[0020] A filter element is provided between the outer cylinder and the intermediate cylinder, and the filter element is used to filter the sewage entering the water outlet structure.

[0021] As a specific solution in this application, it also includes a first driving device, which is at least used to drive the sewage at the bottom of the rapid reaction zone to the top opening of the rapid reaction zone.

[0022] As a specific solution in this application, the first driving device includes a water pump; or the first driving device includes:

[0023] Blower;

[0024] Microporous aerator; located at the bottom of the rapid reaction zone;

[0025] The aeration pipe has one end connected to the output end of the blower and the other end connected to the microporous aerator.

[0026] As a specific solution in this application, the first driving device further includes an exhaust pipe, one end of which is connected to the aeration pipe and the other end of which is connected to the atmosphere.

[0027] As a specific solution in this application, the inner cylinder includes:

[0028] A fixed cylinder is fixed to the intermediate cylinder;

[0029] The movable cylinder forms a vertically movable connection with the top of the fixed cylinder.

[0030] As a specific solution in this application, the inner cylinder further includes:

[0031] At least one limiting groove is provided in the movable cylinder, the limiting grooves are distributed around the circumference of the movable cylinder, and each limiting groove extends in the vertical direction.

[0032] Each limiting post corresponds to one of the limiting slots; the limiting posts are disposed in the fixed cylinder.

[0033] As a specific embodiment of the technical solution in this application, the movable cylinder is movably sleeved on the outside of the fixed cylinder; the movable cylinder includes:

[0034] The first section of the cylinder has the same inner diameter at all points.

[0035] The second section is located at the top of the first section; and the inner diameter of the second section decreases in the vertically upward direction; the second section is elastic, and at least two splicing seams are provided on the second section, each splicing seam penetrating the top of the second section in the vertical direction.

[0036] As a specific solution in this application, it also includes a second driving device, which is at least used to drive the movable cylinder to reciprocate in the vertical direction.

[0037] As a specific embodiment of the technical solution in this application, the second driving device includes an electric push rod or a hydraulic push rod; or the second driving device includes:

[0038] Fixture;

[0039] At least one rotating shaft is rotatably connected to the fixed frame;

[0040] A linkage group corresponding to each rotating shaft; each linkage group includes two first links corresponding to the two ends of the corresponding rotating shaft, and two second links corresponding to the two first links; the first end of the first link is fixed to one end of the corresponding rotating shaft; the second end of the first link is hinged to the first end of the corresponding second link; the second end of the second link is used to be hinged to the movable cylinder;

[0041] The worm gears, each corresponding to a different shaft, are located in the middle of the corresponding shaft.

[0042] The worm meshes with each worm wheel;

[0043] A drive motor, mounted on the fixed frame, is used to drive the worm gear to rotate.

[0044] Secondly, this application also proposes a wastewater treatment method, which is applied to the wastewater treatment equipment as described in any one of the first aspects, the method comprising:

[0045] Acquire production cycle data, which includes at least the aeration period and the water inlet period;

[0046] Based on the aforementioned water inlet time period, wastewater is supplied to the rapid reaction zone;

[0047] Aeration is carried out in the rapid reaction zone based on the aeration time period.

[0048] As a specific solution in this application, before aerating the rapid reaction zone based on the aeration time period, the method further includes:

[0049] Obtain pollution data of the wastewater supplied to the rapid reaction zone during the water intake period;

[0050] Based on the pollution data, the aeration time period is updated to obtain the target aeration time period;

[0051] The aeration of the rapid reaction zone based on the aeration time period includes:

[0052] Aeration is carried out in the rapid reaction zone based on the target aeration time period.

[0053] As a specific solution in this application, the method is applied to the wastewater treatment equipment as described in any of the first aspects, and before aerating the rapid reaction zone based on the target aeration time period, the method further includes:

[0054] Based on the pollution data, adjust the relative positions of the movable cylinder and the fixed cylinder.

[0055] Compared with the prior art, the beneficial effects of this application are:

[0056] The wastewater treatment equipment proposed in this application is based on an integrated coagulation and sedimentation design concept. Combining the principles of chemical coagulation-sedimentation technology, the equipment is designed with a fast reaction zone, a slow reaction zone, and a settling zone. This allows suspended particles and pollutants to react fully and thoroughly with the added reaction agents to form larger aggregates. This not only reduces the footprint of the wastewater treatment equipment but also lowers its construction cost. Attached Figure Description

[0057] Figure 1 This is a perspective view of a wastewater treatment device proposed in the embodiments of this application;

[0058] Figure 2 This is a cross-sectional view of a wastewater treatment device proposed in an embodiment of this application;

[0059] Figure 3 This is a cross-sectional view of another wastewater treatment device proposed in the embodiments of this application;

[0060] Figure 4 This is a cross-sectional view of yet another wastewater treatment device proposed in the embodiments of this application;

[0061] Figure 5 This is a perspective view of an inner cylinder proposed in an embodiment of this application;

[0062] Figure 6 This is a perspective view of a movable cylinder proposed in an embodiment of this application;

[0063] Figure 7 This is a perspective view of a second driving device proposed in an embodiment of this application;

[0064] Figure 8 for Figure 7 A plan view;

[0065] Figure 9This is a schematic diagram of the structure of a first driving device proposed in an embodiment of this application;

[0066] Figure 10 This is a schematic diagram of the structure of a water inlet device proposed in an embodiment of this application;

[0067] Figure 11 This is a flow path diagram of wastewater proposed in the embodiments of this application.

[0068] In the diagram: 1. Outer cylinder; 11. Settling zone; 12. Slow reaction zone; 13. Fast reaction zone; 14. Inlet pipe; 15. Overflow weir; 16. Outlet pipe; 17. Aeration pipe; 18. Sludge discharge pipe; 19. Filter element; 2. Intermediate cylinder; 3. Inner cylinder; 31. Fixed cylinder; 311. Limiting column; 32. Movable cylinder; 321. Limiting groove; 322. First section cylinder; 323. Second section cylinder; 324. 4. Joint seam; 4. Second drive device; 41. Fixing frame; 42. Rotating shaft; 43. Worm gear; 44. Worm; 45. Drive motor; 46. First connecting rod; 47. Second connecting rod; 51. Blower; 52. Exhaust pipe; 53. First valve; 54. Movable joint; 55. Microporous aerator; 61. Dosing tank; 62. Metering pump; 63. Second valve; 64. Vacuum breaking pipe; 65. Inlet pump. Detailed Implementation

[0069] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0070] It should be noted that in the description of this application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 application 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 application.

[0071] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0072] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0073] To address the technical problems mentioned in the background art, this application proposes an embodiment of a wastewater treatment device, specifically, as follows: Figures 1 to 4 As shown, the wastewater treatment equipment includes an outer cylinder 1, a middle cylinder 2, and an inner cylinder 3. The inner cylinder 3 has a rapid reaction zone 13 with openings at both the top and bottom. The middle cylinder 2 is fitted over the inner cylinder 3, and a slow reaction zone 12 with an open bottom is located between the middle cylinder 2 and the inner cylinder 3. The outer cylinder 1 is fitted over the middle cylinder 2, with its bottom closed, and a settling zone 11 is located between the outer cylinder 1 and the middle cylinder 2.

[0074] As described in the background section, existing technologies achieve the three functions of coagulation, sedimentation, and effluent treatment by setting up multiple functional zones in traditional coagulation and sedimentation devices. In the embodiments of this application, the above three functions can also be achieved through an integrated wastewater treatment device.

[0075] Specifically, such as Figure 3 As shown, during use, the wastewater inside the inner cylinder 3 can move along path A, as indicated below, from the bottom of the rapid reaction zone 13 to the top opening of the rapid reaction zone 13, driven by the first driving device described below. In the rapid reaction zone 13, pollutants such as fluoride and arsenic in the wastewater rapidly form large aggregates under the action of the reaction agent. Because this stage of the reaction is carried out under the drive and stirring of the first driving device, the reaction speed between the wastewater and the reaction agent is relatively fast. It should be clear that after passing through the rapid reaction zone 13, most of the pollutants such as fluoride, arsenic, and other suspended solids in the wastewater have already fully reacted with the reaction agent to form aggregates. Figure 3 As shown, the mixture of wastewater and agglomerates enters the slow reaction zone 12 through the top opening of the fast reaction zone 13. Due to the driving action of the first driving device, the mixture still possesses some kinetic energy. Furthermore, because the slow reaction zone 12 is a vertical channel, the mixture also experiences acceleration due to gravity. Therefore, the mixture can continue to mix and flow in the slow reaction zone 12, reacting to form agglomerates. It is important to understand that the reaction rate of the mixture in the slow reaction zone 12 is lower than that in the fast reaction zone 13. In fact, near the bottom of the slow reaction zone 12, the agglomerate formation reaction completely disappears. Specifically, the movement path of the mixture in the slow reaction zone 12 is as follows: Figure 3As shown in path B. It's important to understand that although the kinetic energy of the wastewater disappears at the bottom of the slow reaction zone 12, if water is continuously introduced into the wastewater treatment equipment, the incoming water can push the mixed liquid at the bottom of the slow reaction zone 12 towards the settling zone 11. That is, as... Figure 4 As shown, the mixture located at the bottom of the slow reaction zone 12 can enter the settling zone 11 along path C. It should be clear that the mixture located in the settling zone 11 will undergo an upward flow. Since the density of the aggregates in the mixture is greater than that of water, the mixture in the settling zone 11 will achieve solid-liquid separation based on gravity, that is, the clear water in the mixture rises and the aggregates sink.

[0076] It should be clear that in the embodiments of this application, in order to collect the sludge obtained from sedimentation, as shown in the embodiments of this application... Figures 1 to 4 As shown, the bottom of the outer cylinder 1 can be configured with a gradually decreasing inner diameter along the vertical downward direction, i.e., a funnel-shaped structure (hereinafter referred to as the sludge discharge zone), so that the sludge obtained from the settling zone 11 can all be collected at the bottom of the outer cylinder 1. It should be clear that, due to the funnel-shaped structure at the bottom of the outer cylinder 1, as the settling process in the settling zone 11 continues, the settling process of the aggregates will change from free sedimentation, flocculation sedimentation, stratified sedimentation, and finally compression sedimentation. The sludge at the bottom of the settling zone will form a dense layer of compressed sludge due to the untimely discharge. As the compressed sludge layer forms, the wastewater mixed with aggregates will encounter resistance when passing through the compressed sludge layer. Water can freely penetrate this layer, while the aggregates are blocked in the lower part of this layer, which is equivalent to a filter layer. The wastewater is clearer after filtration.

[0077] It should be clear that, in the embodiments of this application, part of the sludge generated during the reaction process settles directly into the sludge discharge zone at the bottom of the slow reaction zone 12 by gravity, while the other part enters the settling zone 11 and then settles into the sludge discharge zone. In the embodiments of this application, as... Figures 1 to 4 As shown, a sludge discharge pipe 18 can also be installed, which is connected to the sludge discharge zone and used to discharge the sludge in the sludge discharge zone. It should be noted that the kinetic energy of the mixed liquor in the slow reaction zone 12 is relatively small and will not significantly affect the sludge settling at the bottom of the slow reaction zone 12.

[0078] It should be clear that, as mentioned above, in the embodiments of this application, the wastewater in the rapid reaction zone 13 can move from the bottom to the top of the rapid reaction zone 13 under the driving action of the first driving device. That is, see... Figure 4In the embodiments of this application, a portion of the sludge located in the sludge discharge zone can be returned to the rapid reaction zone 13 along path D under the aforementioned driving action. It is readily understood that the sludge returned to the rapid reaction zone 13 has at least the following effects: First, the returned sludge particles can act as sludge nuclei, helping other suspended solids and pollutants to aggregate more easily, promoting the formation of aggregates; second, increasing the sludge concentration helps reduce sludge volume, lower treatment costs, and increase the solids content of the sludge; third, it helps maintain the stable operation of coagulation and sedimentation.

[0079] In the embodiments of this application, the reactant can be a flocculant. Of course, in other embodiments of this application, the reactant can also be a composition formed by flocculant and other agents, such as disinfectant, defoamer and coagulant aid.

[0080] It should be clear that, in the embodiments of this application, in order to enable those skilled in the art to clearly understand the technology of this application, in Figures 2 to 4 The drawing of the bracket connecting the intermediate cylinder 2 and the inner cylinder 3 is omitted. In the embodiments of this application, any form of bracket can be used to connect the intermediate cylinder 2 and the inner cylinder 3. For example, in one embodiment of this application, the bracket can be multiple support rods (not shown in the figure), with one end of each support rod connected to the inner wall of the intermediate cylinder 2 and the other end of each support rod connected to the outer wall of the inner cylinder 3; in another embodiment of this application, the bracket can also be a pipe support (not shown in the figure), etc.

[0081] As described above, during the use of the wastewater treatment equipment proposed in this application embodiment, the wastewater located in the rapid reaction zone 13 overflows from the opening at the top of the rapid reaction zone 13. To ensure that the wastewater in the rapid reaction zone 13 can smoothly enter the slow reaction zone 12 without being blocked by the top of the intermediate cylinder 2 or overflowing from the top of the intermediate cylinder 2, in the embodiments of this application, as follows... Figure 3 As shown, the top height of the intermediate cylinder 2 can be greater than the top height of the inner cylinder 3. (This is because...) Figure 3 It is known that the height difference between the top of the intermediate cylinder 2 and the top of the inner cylinder 3 is H, which is greater than 0 in this embodiment. In the embodiments of this application, the value of the height difference H can be set according to actual needs. For example, the height difference H can be any distance value among 10cm, 20cm, 30cm, 40cm and 50cm, or any distance value between two adjacent distance values ​​mentioned above.

[0082] Similarly, in the embodiments of this application, in order for the wastewater in the slow reaction zone 12 to smoothly enter the settling zone 11, in the embodiments of this application, such as Figure 3 As shown, the top height of the intermediate cylinder 2 can be greater than or equal to the top height of the outer cylinder 1. (This is based on...) Figure 3It is known that the height difference between the top of the intermediate cylinder 2 and the top of the outer cylinder 1 is h, which in this embodiment is greater than or equal to 0. In the embodiments of this application, the value of the height difference h can be set according to actual needs. For example, the height difference h can be any distance value among 0cm, 10cm, 20cm, 30cm, 40cm and 50cm, or any distance value between two adjacent distance values ​​mentioned above.

[0083] It should be clear that, in the embodiments of this application, the wastewater treatment equipment may further include a water inlet device, which is at least used to inject wastewater into the rapid reaction zone 13. In the embodiments of this application, the water inlet device can be any device capable of injecting wastewater into the rapid reaction zone 13. For example, in one embodiment of this application, the water inlet device can be a wastewater tank, which is connected to the rapid reaction zone 13 via a pipe, and the liquid level in the wastewater tank is higher than the liquid level in the rapid reaction zone 13. That is, the wastewater in the wastewater tank can enter the rapid reaction zone 13 by gravity. In another embodiment of this application, such as... Figure 10 As shown, the water inlet device includes a water inlet pump 65 and a water inlet pipe 14. One end of the water inlet pipe 14 is connected to the output end of the water inlet pump 65, and the other end is connected to the rapid reaction zone 13. That is to say, in this embodiment, sewage can be forcibly injected into the rapid reaction zone 13 by the water inlet pump 65.

[0084] It should be clear that, in the embodiments of this application, in order to simultaneously inject wastewater into the rapid reaction zone 13 and also inject the reaction agent into the rapid reaction zone 13, the water inlet device is also used to inject the reaction agent into the rapid reaction zone 13 in this embodiment. For example... Figure 10 As shown, the water inlet device may further include a dosing tank 61 and a metering pump 62. The input end of the metering pump 62 is connected to the dosing tank 61, and the output end of the metering pump 62 is connected to the water inlet pipe 14. That is, the metering pump 62 can inject the reaction agent from the dosing tank 61 into the water inlet pipe 14, and the reaction agent then enters the rapid reaction zone 13 through the water inlet pipe 14. Of course, in other embodiments of this application, the liquid level in the dosing tank 61 may be higher than the liquid level in the water inlet pipe 14, so that the reaction agent in the dosing tank 61 can enter the water inlet pipe 14 by gravity.

[0085] To avoid a siphon effect when the water inlet device is not in operation, and to prevent wastewater from being drawn from the rapid reaction zone 13, in the embodiments of this application, such as Figure 10As shown, the water inlet device may further include a vacuum breaking pipe 64, one end of which is connected to the water inlet pipe 14, and the other end of which is connected to the atmosphere. It is readily understood that in other embodiments of this application, to prevent the aeration pipe 17 from generating a siphon effect when it is not in operation, thus preventing the rapid reaction zone 13 from drawing in wastewater, a vacuum breaking pipe (not shown in the figure) may also be provided on the aeration pipe 17.

[0086] It should be clear that, in the embodiments of this application, the wastewater treatment equipment may further include an effluent structure, which is at least used for discharging water from the settling zone 11 into the outer cylinder 1. It should also be clear that, in the embodiments of this application, the effluent structure may include a water pump and a water pipe, with one end of the water pipe connected to the input end of the water pump and the other end connected to the settling zone 11. That is, in this embodiment, water in the settling zone 11 can be drawn from the settling zone 11 using the water pump and water pipe to discharge water from the settling zone 11 into the outer cylinder 1. In one embodiment of this application, as... Figure 3 As shown, the water outlet structure includes an opening at the top of the outer cylinder 1. That is, in this embodiment, water in the settling zone 11 can overflow from the opening at the top of the outer cylinder 1, thereby allowing water in the settling zone 11 to be discharged from the outer cylinder 1. In another embodiment of this application, as... Figure 2 and Figure 4 As shown, the water outlet structure may include a water outlet pipe 16 and an overflow weir 15 disposed on the inner wall of the outer cylinder 1, wherein the water outlet pipe 16 is connected to the overflow weir 15. It is easy to understand that in this embodiment, the water in the settling zone 11 first overflows into the overflow weir 15, and then is discharged from the outer cylinder 1 by the water outlet pipe 16.

[0087] To prevent flocculants or suspended sludge from flowing out of the outer cylinder 1 from the effluent structure, in one embodiment of this application, a filter element 19 is provided between the outer cylinder 1 and the intermediate cylinder 2. The filter element 19 is used to filter the wastewater entering the effluent structure. Figure 2 As shown, the filter element 19 effectively prevents flocculants or suspended sludge from flowing out of the outer cylinder 1 through the effluent structure. In the embodiments of this application, the filter element 19 can be any component capable of filtration, such as filter cotton, filter screen, or filter packing.

[0088] As described above, in the wastewater treatment equipment proposed in this application embodiment, the wastewater located in the rapid reaction zone 13 needs to be moved from the bottom to the top of the rapid reaction zone 13 under the action of external force. Therefore, in the embodiments of this application, the wastewater treatment equipment may further include a first driving device, which is at least used to drive the wastewater at the bottom of the rapid reaction zone 13 to the top opening of the rapid reaction zone 13.

[0089] It should be clear that in the embodiments of this application, the first driving device may include a water pump. The water pump can drive the sewage at the bottom of the rapid reaction zone 13 to the top opening of the rapid reaction zone 13. In this embodiment, a water pump can be set separately in the rapid reaction zone 13, or the inlet pump 65 mentioned above can be used directly as the water pump in the first driving device. It should be clear that in the embodiments of this application, the more uniformly the sewage and reactants are mixed in the rapid reaction zone 13, the more fully the pollutants such as fluoride, arsenic and other suspended solids in the sewage are removed. That is to say, in the embodiments of this application, a mechanical stirring structure (e.g., a stirring paddle) can also be set in the rapid reaction zone 13 to ensure that the sewage and reactants in the rapid reaction zone 13 are fully mixed. In this embodiment, in order to ensure that the sewage and reactants in the rapid reaction zone 13 without a mechanical stirring structure can also be fully mixed, multiple swirling nozzles can be set on the inlet pipe 14 located in the rapid reaction zone 13, so that the sewage in the rapid reaction zone 13 forms multiple swirling streams, which is beneficial to the full mixing of sewage and reactants.

[0090] To ensure uniform distribution and mixing of wastewater within the rapid reaction zone 13, in one embodiment of this application, a rectangular water distribution pipe (not shown in the figure) is installed inside the inner cylinder 3 at a position 0.7m from the bottom of the outer cylinder 1. The rectangular water distribution pipe has horizontally oriented, uniformly spaced openings with a diameter of 20mm, and is connected to the inlet pump 65 via an inlet pipe 14. It is readily understood that in other embodiments of this application, the water distribution pipe may also be circular. The water distribution pipe allows wastewater flowing out of the pipe to flow radially along the inner cylinder 3, while the first driving device drives the wastewater in the rapid reaction zone 13 to flow axially along the inner cylinder 3. These two different flow directions allow for more uniform mixing of the wastewater and chemical agents in the rapid reaction zone 13, and also ensure a more even distribution of wastewater within the rapid reaction zone 13, preventing short-circuiting.

[0091] In another embodiment of this application, such as Figure 9 As shown, the first driving device may include a blower 51, an aeration pipe 17, and a microporous aerator 55. The microporous aerator 55 is located at the bottom of the rapid reaction zone 13. One end of the aeration pipe 17 is connected to the output end of the blower 51, and the other end of the aeration pipe 17 is connected to the microporous aerator 55. That is, in this embodiment, the wastewater and reactants in the rapid reaction zone 13 can be lifted and stirred by generating aeration. Figure 9As shown, to facilitate maintenance and repair of the device, a movable joint 54 can be used to connect the blower 51 to the aeration pipe 17, and a first valve 53 is installed between the movable joint 54 and the blower 51. It is readily understood that, to facilitate maintenance and repair of the aforementioned water inlet device, a movable joint (not shown in the figure) can also be used to connect the water inlet pump 65 and the water inlet pipe 14, and as shown... Figure 10 As shown, a second valve 63 is installed on the water inlet pipe 14. It is readily understood that, in the embodiments of this application, control valves may also be required on other pipes, such as the sludge discharge pipe 18 and the vacuum breaking pipe 64.

[0092] It is important to understand that, in the embodiments of this application, the microporous aerator 55 has at least the following two functions: First, through aeration, it further mixes the wastewater and chemical agents inside the rapid reaction zone 13, thus acting as a mechanical stirrer; Second, the microporous aerator 55 generates an air column parallel to the axial direction of the inner cylinder 3, generating a lifting force that propels the wastewater in the rapid reaction zone 13 from bottom to top, acting as a lift pump. Third, due to the aeration, the wastewater in the inner cylinder 3 expands and decreases in density as it fills with gas, creating a density difference with the wastewater in the slow reaction zone 12. At this point, the less dense wastewater in the rapid reaction zone 13 flows towards the more dense wastewater in the slow reaction zone 12. This is because the greater gravity of the more dense wastewater in the slow reaction zone 12 promotes its downward flow, and the driving force generated by aeration pushes the fluid in the upper layer of the slow reaction zone 12 downward. Therefore, under the driving force of these two forces, the effect of the wastewater in the rapid reaction zone 13 flowing towards the slow reaction zone 12 is achieved. Fourth, because the wastewater in the slow reaction zone 12 moves from top to bottom, the wastewater at the bottom of the intermediate cylinder 2 will exhibit two states of motion, as follows: Figure 4 Paths C and D are shown. It is important to understand that the air column generated by the microporous aerator 55 results in lower sewage pressure at the bottom of the inner cylinder 3. This lower pressure forces a small portion of the sewage flowing down from the slow reaction zone 12 back into the fast reaction zone 13 along path D. Since this portion of sewage also contains some newly formed aggregate particles, some sludge recirculation occurs. The sewage re-participating in the coagulation reaction undergoes further treatment, resulting in better pollutant removal. Most of the sewage flowing down from the slow reaction zone 12 enters the settling zone 11 along path C under the driving force. After entering the settling zone 11, the chemical sludge in the sewage undergoes sedimentation, eventually forming a dense sludge layer. Therefore, when the sewage passes through this area, the sediment is retained, allowing only clear water to pass through, ultimately resulting in qualified clear water being produced at the top of the settling zone 11. Specifically, in the embodiments of this application, the sewage flow path is as follows: Figure 11 As shown, no further details will be provided.

[0093] It is important to understand that during aeration, if the blower 51 supplies too much air, and aeration does not require that much air, the excess air may damage the first drive unit or the wastewater treatment equipment. To avoid damage to the first drive unit or wastewater treatment equipment due to excessive air supply from the blower 51, in the embodiments of this application, such as... Figure 9 As shown, the first driving device may also include an exhaust pipe 52, one end of which is connected to the aeration pipe 17, and the other end of which is connected to the atmosphere. If the blower 51 provides excessive air, the excess air can be discharged to the atmosphere through the exhaust pipe 52.

[0094] It is easy to understand that in the wastewater treatment process, the more severe the pollution of the wastewater, the higher the content of pollutants such as fluoride, arsenic, and other suspended solids. This means that the wastewater requires a longer reaction time with chemical agents during treatment. Conversely, the less polluted the wastewater, the shorter the reaction time. As mentioned above, in the embodiments of this application, pollutants such as fluoride, arsenic, and other suspended solids in the wastewater mainly form aggregates with chemical agents in the fast reaction zone 13 and the slow reaction zone 12. In other words, the reaction time between the wastewater and the chemical agents depends on the vertical length of the fast reaction zone 13 and the slow reaction zone 12; the longer the vertical length of the fast reaction zone 13 and the slow reaction zone 12, the longer the reaction time between the wastewater and the chemical agents. It should be clear that the fast reaction zone 13 is located inside the inner cylinder 3, while the slow reaction zone 12 is located between the inner cylinder 3 and the intermediate cylinder 2. That is, in the embodiments of this application, the lengths of the fast reaction zone 13 and the slow reaction zone 12 in the vertical direction can be controlled by controlling the height of the inner cylinder 3.

[0095] Specifically, in the embodiments of this application, in order to control the height of the inner cylinder 3, the lengths of the fast reaction zone 13 and the slow reaction zone 12 in the vertical direction are controlled. For example... Figure 2 , Figure 3 and Figure 5 As shown, the inner cylinder 3 includes a fixed cylinder 31 and a movable cylinder 32. The fixed cylinder 31 is fixed to the intermediate cylinder 2. The movable cylinder 32 is vertically connected to the top of the fixed cylinder 31. In this embodiment, the movable cylinder 32 can be configured as follows: Figure 2 , Figure 3 and Figure 5 It can be fitted onto the outside of the fixed cylinder 31, or it can be fitted onto the inside of the fixed cylinder 31 (not shown in the figure). Figure 2 As shown, since the top of the movable cylinder 32 and the fixed cylinder 31 form a movable sleeve in the vertical direction, in this embodiment, the height of the inner cylinder 3 can be controlled by controlling the relative position between the movable cylinder 32 and the fixed cylinder 31.

[0096] In this embodiment, to allow those skilled in the art to clearly see the positional relationship between the fixed cylinder 31 and the intermediate cylinder 2, the connection relationship between the fixed cylinder 31 and the intermediate cylinder 2 is not shown in detail. In the embodiments of this application, the fixed cylinder 31 and the intermediate cylinder 2 can be fixedly connected in any way, as long as the fixed connection does not block the slow reaction zone 12, that is, it does not prevent the wastewater in the slow reaction zone 12 from flowing... Figure 3 The flow can proceed along path B. In one embodiment of this application, the fixed cylinder 31 and the intermediate cylinder 2 can be fixed together by a pipe support. In another embodiment of this application, the fixed cylinder 31 and the intermediate cylinder 2 can be fixed together by multiple connecting rods, with one end of each connecting rod connected to the inner wall of the intermediate cylinder 2 and the other end of each connecting rod connected to the outer wall of the fixed cylinder 31.

[0097] It is important to understand that, in the embodiments of this application, the relative position between the movable cylinder 32 and the fixed cylinder 31 can be adjusted based on the degree of sewage pollution to control the vertical length of the fast reaction zone 13 and the slow reaction zone 12. It is easy to understand that if the sewage is severely polluted, the movable cylinder 32 can be moved vertically upwards to increase the height of the inner cylinder 3. This increases the residence time of the sewage in the fast reaction zone 13 and the slow reaction zone 12, allowing the pollutants in the sewage to be thoroughly flocculated, resulting in qualified effluent. As mentioned above, the sewage in the fast reaction zone 13 requires the drive of the first driving device to move from the bottom of the fast reaction zone 13 to the top opening of the fast reaction zone 13. The higher the height of the inner cylinder 3, the more driving energy is required. If the sewage is less polluted, the movable cylinder 32 can be moved vertically downwards to decrease the height of the inner cylinder 3, thereby reducing energy consumption.

[0098] It should be clear that, in order to avoid circumferential rotation of the movable cylinder 32 during its vertical movement, in one embodiment of this application, such as... Figure 5 As shown, the inner cylinder 3 also includes at least one limiting groove 321 disposed on the movable cylinder 32, and limiting posts 311 corresponding to each limiting groove 321. The limiting grooves 321 are distributed circumferentially around the movable cylinder 32, and each limiting groove 321 extends vertically. The limiting posts 311 are disposed on the fixed cylinder 31. The limiting grooves 321 and limiting posts 311 effectively prevent the movable cylinder 32 from rotating circumferentially.

[0099] It is readily understood that in other embodiments of this application, the limiting groove 321 may be disposed in the fixed cylinder 31, while the limiting post 311 may be disposed in the movable cylinder 32.

[0100] As mentioned above, the flocculation reaction in wastewater mainly occurs in the rapid reaction zone 13. This means that, given a relatively high level of wastewater pollution, the longer the wastewater remains in the rapid reaction zone 13, the more thoroughly the pollutants in the wastewater will be flocculated. To further improve the flocculation efficiency of severely polluted wastewater, in one embodiment of this application, the movable cylinder 32 is movably sleeved on the outside of the fixed cylinder 31, such as... Figure 6 As shown, the movable cylinder 32 includes a first section 322 and a second section 323. The first section 322 has the same inner diameter at all points. The second section 323 is disposed on top of the first section 322, and the inner diameter of the second section 323 decreases vertically upwards. In this embodiment, the second section 323 is elastic, and at least two seams 324 are provided on the second section 323, each seam 324 penetrating the top of the second section 323 vertically.

[0101] It is easy to understand, such as Figure 6 As shown, due to the aforementioned characteristics of the second section cylinder 323, the opening at the top of the second section cylinder 323 (i.e., the opening at the top of the inner cylinder 3) changes when the movable cylinder 32 moves vertically. It is easy to understand that if the movable cylinder 32 moves vertically upwards, the opening at the top of the second section cylinder 323 shrinks; if the movable cylinder 32 moves vertically downwards, the opening at the top of the second section cylinder 323 expands. It is important to understand that the smaller the opening at the top of the inner cylinder 3, the slower the wastewater flows out of the rapid reaction zone 13, meaning the longer the wastewater stays in the rapid reaction zone 13. Through the movable cylinder 32 with the above structure, not only can the overall height of the inner cylinder 3 be adjusted, but also the size of the opening at the top of the inner cylinder 3 can be adjusted.

[0102] In embodiments of this application, the relative positions between the movable cylinder 32 and the fixed cylinder 31 can be adjusted manually based on the degree of pollution of the wastewater to be treated. In other embodiments of this application, the wastewater treatment equipment may further include a second driving device, which is at least used to drive the movable cylinder 32 to reciprocate in the vertical direction.

[0103] It is readily understood that, in the embodiments of this application, the second driving device can be any device capable of linear reciprocating motion. For example, the second driving device can be an electric actuator or a hydraulic actuator.

[0104] In the embodiments of this application, to prevent sewage from overflowing into the slow reaction zone 12 through the gap at the connection between the movable cylinder 32 and the fixed cylinder 31, the fitting clearance between the movable cylinder 32 and the fixed cylinder 31 is generally set to be small. In the embodiments of this application, if only one electric push rod or hydraulic push rod is used to drive the movable cylinder 32 to reciprocate, the movable cylinder 32 is prone to uneven force and tilting. This can result in minor jamming between the movable cylinder 32 and the fixed cylinder 31, or even damage to the movable cylinder 32 and / or the fixed cylinder 31. In one embodiment of this application, to prevent the movable cylinder 32 from tilting due to uneven force during movement, multiple electric push rods or hydraulic push rods evenly distributed around the movable cylinder 32 can be provided. By having multiple electric push rods or hydraulic push rods synchronously drive the movable cylinder 32 to reciprocate, the uneven force and tilting of the movable cylinder 32 during movement can be avoided.

[0105] It is readily understood that in the above embodiments, if any one of the multiple electric or hydraulic actuators moves asynchronously with the others, the aforementioned technical problem will still occur. To further reduce the probability of this technical problem occurring, in one embodiment of this application, such as... Figure 7 and Figure 8 As shown, the second drive device includes a fixed frame 41, two rotating shafts 42, two sets of connecting rods corresponding to each rotating shaft 42, two worm gears 43 corresponding to each rotating shaft 42, a worm 44, and a drive motor 45. The rotating shafts 42 are rotatably connected to the fixed frame 41. Figure 7 As shown, each linkage assembly includes two first linkages 46 corresponding to the two ends of the corresponding rotating shaft 42, and two second linkages 47 corresponding to the two first linkages 46. The first end of each first linkage 46 is fixed to one end of the corresponding rotating shaft 42, and the second end of each first linkage 46 is hinged to the first end of the corresponding second linkage 47. The second end of each second linkage 47 is hinged to the movable cylinder 32. A worm gear 43 is located in the middle of the corresponding rotating shaft 42. A worm 44 meshes with the two worm gears 43. A drive motor 45 is mounted on the fixed frame 41 and is used to drive the worm 44 to rotate.

[0106] It is readily understood that, in the embodiments of this application, as Figure 8 As shown, in use, the drive motor 45 drives the worm gear 44 to rotate, which in turn drives the worm wheel 43 to rotate. The worm wheel 43 then drives the corresponding shaft 42 to rotate, which in turn drives the first connecting rods 46 at both ends of the shaft 42 to rotate. The first connecting rods 46 then drive the corresponding second connecting rods 47 to move, and the multiple second connecting rods 47 can drive the movable cylinder 32 to move in the vertical direction.

[0107] In this embodiment, the second connecting rods 47 can be evenly distributed around the circumference of the movable cylinder 32, so that the movable cylinder 32 can be evenly stressed during movement and will not tilt. Furthermore, the entire device only needs to use one drive motor 45 to achieve synchronous drive, and there will be no uneven stress or tilting of the movable cylinder 32 due to multiple drive sources being out of sync.

[0108] In the embodiments of this application, such as Figure 1 As shown, the fixing frame 41 can be installed on the top of the outer cylinder 1, or on the ground or other locations (not shown in the figure). It is easy to understand that in this embodiment, since the fixing frame 41 is mainly used to support various components of the second drive device, there are no restrictions on its shape and structure.

[0109] In other embodiments of this application, while satisfying the tilting requirement of the movable cylinder 32, only one rotating shaft 42 may be provided to reduce the complexity of the equipment. Of course, to avoid tilting of the movable cylinder 32, the number of rotating shafts 42 may be increased. In the embodiments of this application, the number of connecting rod groups is the same as the number of rotating shafts 42, that is, a one-to-one correspondence between connecting rod groups and rotating shafts 42; the number of worm gears 43 is the same as the number of rotating shafts 42, that is, a one-to-one correspondence between worm gears 43 and rotating shafts 42.

[0110] It should be clear that the integrated wastewater treatment equipment proposed in this application embodiment has at least the following characteristics compared to the traditional separate construction of coagulation tanks and sedimentation tanks:

[0111] First, since the wastewater treatment equipment in this application integrates the coagulation and sedimentation processes into one device, the structure of the entire device is more compact, the space utilization rate is high, and the construction space required is small.

[0112] Secondly, due to the compact structure of the wastewater treatment equipment in this embodiment, it requires less space than a traditional coagulation sedimentation tank when treating the same volume of wastewater. Because of its smaller size, this wastewater treatment equipment is suitable for construction and use in spaces with limited space.

[0113] Third, traditional coagulation sedimentation tanks require multiple steps of chemical dosing, mixing, and waiting for sedimentation time. However, the wastewater treatment equipment in this embodiment is equipped with various automated control devices, which can adjust preset parameters in real time according to the wastewater quality and quantity to achieve automatic control, making operation simpler.

[0114] Fourth, the wastewater treatment equipment in this application embodiment can use aeration to lift and stir the wastewater, which not only makes the flocculation reaction uniform and thorough, but also effectively reduces energy consumption and lowers operating costs.

[0115] Fifth, traditional coagulation sedimentation tanks require a long settling time, resulting in a large amount of sludge. However, the wastewater treatment equipment in this embodiment optimizes the coagulation and sedimentation process. During wastewater treatment, due to airlift, some of the sludge from the intermediate cylinder is returned to the inner cylinder to participate in the reaction again. On the one hand, the returned sludge can act as nuclei for the flocculation of pollutants in the new wastewater, promoting rapid flocculation and reducing the amount of flocculant needed while resulting in larger flocculated product particle sizes. Due to the stirring effect, the structurally unstable sludge will disintegrate, resulting in a denser sludge structure. Larger sludge particles are trapped by the compressed sludge layer formed in the outer cylinder, making the sludge layer increasingly dense. In contrast, the sludge structure formed in traditional coagulation sedimentation tanks is relatively loose. Therefore, for the same mass of sludge, the sludge produced by this invention has a lower water content and smaller volume, meaning less sludge volume is generated.

[0116] In summary, the wastewater treatment equipment proposed in this application is based on an integrated coagulation and sedimentation design concept, combined with the principles of chemical coagulation-sedimentation technology. It rationally designs rapid reaction zones, slow reaction zones, and settling zones within the wastewater treatment equipment, allowing suspended particles and pollutants to react fully and thoroughly with the added reaction agents to form larger aggregates. This not only reduces the footprint of the wastewater treatment equipment but also lowers its construction costs. In some embodiments of this application, using aeration to lift and stir the wastewater not only improves the treatment efficiency of fluoride- and arsenic-containing wastewater but also reduces its treatment costs.

[0117] It is important to understand that using the wastewater treatment equipment proposed in the embodiments of this application to treat fluoride- and arsenic-containing wastewater is merely one application scenario of the wastewater treatment equipment proposed in the embodiments of this application, and should not be construed as a limitation on the wastewater treatment equipment in the embodiments of this application. In other words, in the embodiments of this application, the wastewater treatment equipment can not only be used for the treatment of fluoride- and arsenic-containing wastewater, but also for the treatment of other types of wastewater based on the principle of chemical coagulation-sedimentation technology.

[0118] After introducing all embodiments of the wastewater treatment equipment proposed in this application, an embodiment of a wastewater treatment method proposed in this application is described below. This method is applied to the wastewater treatment equipment proposed in any of the above embodiments. It should be clear that in the embodiments of this application, aeration and influent can be continuously injected into the rapid reaction zone 13 for water injection and aeration. However, in actual operation, it has been found that if continuous influent and continuous aeration are used, and the influent flow rate is too large, there is a risk that the newly introduced wastewater, after mixing in the rapid reaction zone 13, may not have fully reacted and may directly flow out of the slow reaction zone 12. To avoid this phenomenon, in one embodiment of this application, the method includes steps S100 to S300:

[0119] Step S100: Obtain production cycle data, which includes at least the aeration period and the water inlet period.

[0120] Specifically, in this embodiment, the aeration period refers to the time during which aeration occurs within the production cycle; the water intake period refers to the time during which water is introduced within the production cycle. That is, in the embodiments of this application, aeration and water intake do not necessarily occur simultaneously within the production cycle; both aeration and water intake can be intermittent. For example, in a specific embodiment of this application, assuming a production cycle is 30 minutes, the first 25 minutes are the water intake period, and the entire production cycle is the aeration period; then, after the start of the production cycle, wastewater is supplied to the rapid reaction zone 13 through the water intake device for the first 25 minutes, and the supply of wastewater to the rapid reaction zone 13 stops after 25 minutes. Throughout the entire production cycle, aeration is continuously provided to the rapid reaction zone 13 through the first driving device. Of course, in the embodiments of this application, to improve the service life of the first driving device, the first driving device can also operate intermittently. For example, in the above embodiment, the aeration period can also be 28 minutes of aeration within the production cycle, with aeration stopping for the last 2 minutes.

[0121] Step S200: Based on the influent time period, sewage is supplied to the rapid reaction zone 13.

[0122] It should be clear that, in the embodiments of this application, the production cycle and water intake time period can be designed according to actual needs. It is easy to understand that if the wastewater pollution is severe, the water intake time period can be appropriately shortened; if the wastewater pollution is relatively mild, the water intake time period can be appropriately extended.

[0123] Step S300: Aerate the rapid reaction zone 13 based on the aeration time period.

[0124] It should be clear that, in the embodiments of this application, the aeration time period can be designed according to actual needs. It is easy to understand that if the wastewater pollution is severe, the aeration time period can be appropriately increased; if the wastewater pollution is relatively mild, the aeration time period can be appropriately shortened.

[0125] It is important to understand that, through the methods described above, intermittent water intake can effectively prevent short-circuiting caused by excessive sewage intake.

[0126] It is important to understand that, as mentioned above, given a fixed influent and aeration time period within the production cycle, if the pollution level of the wastewater entering the rapid reaction zone 13 increases, the same aeration time will result in incomplete flocculation treatment; conversely, if the pollution level of the wastewater entering the rapid reaction zone 13 decreases, the same aeration time will waste energy. To address these technical problems, in one embodiment of this application, before aeration of the rapid reaction zone 13 based on the aeration time period in step S300, the method further includes steps S400 to S700:

[0127] Step S400: Obtain pollution data of wastewater supplied to the rapid reaction zone 13 during the influent time period.

[0128] It is important to understand that, in the embodiments of this application, pollution data of the wastewater supplied to the rapid reaction zone 13 can be obtained in any manner. For example, in one embodiment of this application, sensors can be used to obtain the average pollution level of the wastewater entering the rapid reaction zone 13 during the production cycle as pollution data. Alternatively, multiple sensors can be deployed in the rapid reaction zone 13, and the average pollution level of the multiple sensors can be obtained as pollution data. In other words, in the embodiments of this application, the pollution data of the wastewater supplied to the rapid reaction zone 13 can be designed and obtained according to actual needs.

[0129] Step S500: Based on the pollution data, update the aeration time period to obtain the target aeration time period.

[0130] It should be clear that, as mentioned above, in the embodiments of this application, the aeration time period during the production cycle can be appropriately adjusted based on the degree of pollution of the wastewater in the rapid reaction zone 13.

[0131] In the embodiments of this application, step S300, aerating the rapid reaction zone 13 based on the aeration time period, includes step S310: aerating the rapid reaction zone 13 based on the target aeration time period. That is, in this embodiment, the wastewater in the rapid reaction zone 13 is aerated based on the updated aeration time period (i.e., the target aeration time period).

[0132] Since the aeration time period mentioned above is dynamically set based on the pollution level of the wastewater entering the rapid reaction zone 13, it can avoid the phenomenon of wastewater entering the rapid reaction zone 13 being highly polluted and pollutants not being completely flocculated, or waste of aeration energy due to low pollution levels.

[0133] As can be seen from the foregoing, in the embodiments of this application, the height of the inner cylinder 3 can be adjusted based on the degree of pollution of the wastewater to ensure thorough flocculation of wastewater with a high degree of pollution, thus saving the energy consumption of lifting wastewater with a low degree of pollution. In one embodiment of this application, before aeration of the rapid reaction zone 13 based on the target aeration time period in step S310, the method further includes:

[0134] Step S320: Based on the pollution data, adjust the relative positions of the movable cylinder 32 and the fixed cylinder 31.

[0135] It should be clear that in the embodiments of this application, if the pollution data of the wastewater increases, the movable cylinder 32 can be raised vertically; if the pollution data of the wastewater decreases, the movable cylinder 32 can be lowered vertically.

[0136] The wastewater treatment method proposed in this application, combined with the wastewater treatment equipment proposed in this application, uses aeration to lift and stir the wastewater, which can not only improve the treatment efficiency of fluoride- and arsenic-containing wastewater, but also reduce the treatment cost of fluoride- and arsenic-containing wastewater.

[0137] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device, characterized in that, include: The inner cylinder (3) has a rapid reaction zone (13) with openings at the top and bottom. An intermediate cylinder (2) is fitted outside the inner cylinder (3), and a slow reaction zone (12) with a bottom opening is provided between the intermediate cylinder (2) and the inner cylinder (3). The outer cylinder (1) is fitted outside the intermediate cylinder (2). The bottom of the outer cylinder (1) is closed, and a settling zone (11) is provided between the outer cylinder (1) and the intermediate cylinder (2). A first driving device, the first driving device being used at least to drive the sewage at the bottom of the rapid reaction zone (13) to the top opening of the rapid reaction zone (13); The inner cylinder (3) includes: The fixed cylinder (31) is fixed to the intermediate cylinder (2); The movable cylinder (32) forms a vertically movable connection with the top of the fixed cylinder (31); The movable cylinder (32) is movably sleeved on the outside of the fixed cylinder (31); the movable cylinder (32) includes: The first section of the cylinder (322) has the same inner diameter at all points. The second section (323) is disposed at the top of the first section (322); and the inner diameter of the second section (323) decreases in the vertical upward direction; the second section (323) is elastic, and at least two splicing seams (324) are provided on the second section (323), each splicing seam (324) penetrating the top of the second section (323) in the vertical direction; If the pollution data of the wastewater increases, the movable cylinder (32) can be raised vertically; if the pollution data of the wastewater decreases, the movable cylinder (32) can be lowered vertically.

2. The wastewater treatment equipment according to claim 1, characterized in that, The top height of the intermediate cylinder (2) is greater than the top height of the inner cylinder (3); the top height of the intermediate cylinder (2) is greater than or equal to the top height of the outer cylinder (1).

3. The wastewater treatment equipment according to claim 1, characterized in that, It also includes a water inlet device, which is at least used to inject wastewater into the rapid reaction zone (13); the water inlet device includes: Inlet pump (65); The water inlet pipe (14) is connected at one end to the output end of the water inlet pump (65) and at the other end to the rapid reaction zone (13).

4. The wastewater treatment equipment according to claim 3, characterized in that, The water inlet device is also used to inject reaction agents into the rapid reaction zone (13); the water inlet device further includes: Dosing tank (61); The metering pump (62) has its input end connected to the dosing tank (61) and its output end connected to the water inlet pipe (14).

5. The wastewater treatment equipment according to claim 4, characterized in that, The water inlet device also includes a vacuum breaking tube (64), one end of which is connected to the water inlet pipe (14), and the other end of which is connected to the atmosphere.

6. The wastewater treatment equipment according to claim 1, characterized in that, It also includes a water outlet structure, which is at least used to discharge water from the settling zone (11) into the outer cylinder (1); the water outlet structure includes an opening disposed at the top of the outer cylinder (1); Alternatively, the water outlet structure may include: An overflow weir (15) is provided on the inner wall of the outer cylinder (1); The outlet pipe (16) is connected to the overflow weir (15); A filter element (19) is provided between the outer cylinder (1) and the intermediate cylinder (2), and the filter element (19) is used to filter sewage entering the effluent structure.

7. The wastewater treatment equipment according to claim 1, characterized in that, The first driving device includes a water pump.

8. The wastewater treatment equipment according to claim 1, characterized in that, The first driving device includes: Blower (51); Microporous aerator (55); disposed at the bottom of the rapid reaction zone (13); The aeration pipe (17) is connected at one end to the output end of the blower (51) and at the other end to the microporous aerator (55).

9. The wastewater treatment equipment according to claim 8, characterized in that, The first driving device also includes an exhaust pipe (52), one end of which is connected to the aeration pipe (17), and the other end of which is connected to the atmosphere.

10. The wastewater treatment equipment according to any one of claims 1 to 9, characterized in that, The inner cylinder (3) also includes: At least one limiting groove (321) is provided in the movable cylinder (32), and each limiting groove (321) is distributed around the circumference of the movable cylinder (32), and each limiting groove (321) extends in the vertical direction. Limiting posts (311) are corresponding one-to-one with each limiting groove (321); the limiting posts (311) are set in the fixed cylinder (31).

11. The wastewater treatment equipment according to any one of claims 1 to 9, characterized in that, It also includes a second driving device, which is at least used to drive the movable cylinder (32) to reciprocate in the vertical direction.

12. The wastewater treatment equipment according to claim 11, characterized in that, The second drive device includes an electric actuator or a hydraulic actuator; or the second drive device includes: Fixture (41); At least one rotating shaft (42) is rotatably connected to the fixed frame (41); A linkage group corresponding to each rotating shaft (42); each linkage group includes two first linkages (46) corresponding to the two ends of the corresponding rotating shaft (42) and two second linkages (47) corresponding to the two first linkages (46); the first end of the first linkage (46) is fixed to one end of the corresponding rotating shaft (42); the second end of the first linkage (46) is hinged to the first end of the corresponding second linkage (47); the second end of the second linkage (47) is used to be hinged to the movable cylinder (32); A worm gear (43) corresponding to each of the rotating shafts (42) is set in the middle of the corresponding rotating shaft (42); The worm (44) meshes with each worm wheel (43); A drive motor (45) is mounted on the fixed frame (41) and is used to drive the worm (44) to rotate.

13. A wastewater treatment method, characterized in that, The method is applied to the wastewater treatment equipment as described in any one of claims 1 to 12, and the method includes: Acquire production cycle data, which includes at least the aeration period and the water inlet period; Based on the aforementioned water inlet time period, wastewater is supplied to the rapid reaction zone (13); Based on the aeration time period, aeration is carried out in the rapid reaction zone (13).

14. The wastewater treatment method according to claim 13, characterized in that, Before aerating the rapid reaction zone (13) based on the aeration time period, the method further includes: Obtain pollution data of the wastewater supplied to the rapid reaction zone (13) during the water inlet time period; Based on the pollution data, the aeration time period is updated to obtain the target aeration time period; The aeration of the rapid reaction zone (13) based on the aeration time period includes: Aeration is performed in the rapid reaction zone (13) based on the target aeration time period.

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