Wastewater treatment system

Abstract

The utility model discloses a wastewater treatment system which comprises a reaction tank, a recovery tank, a water inlet pipe, a material return pipe and magnetic suction equipment, the recycling pool is provided with a water inlet and a water outlet, a material returning opening is formed in the bottom wall of the recycling pool and located between the water inlet and the water outlet, and the bottom wall of the recycling pool is downwards inclined from the end close to the water inlet to the end close to the material returning opening; the water inlet pipe communicates with the water inlet and the reaction tank; the return pipe is communicated with the return port and the reaction tank; and the magnetic suction equipment is arranged at the bottom of the recovery pool and is positioned between the water inlet and the material return port. According to the scheme, on the basis of not influencing the operation of the original reaction tank, the magnetic catalyst in the effluent can be separated and recovered by utilizing the combined action of gravity precipitation and magnetic attraction, and the recovered magnetic catalyst enters the reaction tank through a pipeline, so that the power consumption and the catalyst adding cost in the operation treatment are reduced, and the operation efficiency is improved. Therefore, the operation cost of the project is reduced, and the purposes of reducing cost and increasing efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a wastewater treatment system. Background Art

[0002] In the treatment of coking wastewater, magnetic catalysts are usually used to utilize the catalyst to produce active substances under specific conditions to degrade and remove difficult-to-degrade organic matter in the wastewater. It has the characteristics of high efficiency, no secondary pollution, and good removal effect. At the same time, based on the magnetism of the magnetic catalyst, magnetic absorption recovery can be performed.

[0003] For example, patent CN 206570054 U discloses a sewage treatment device that is convenient for dispersing and recovering photocatalysts. The device divides the catalyst collection pool into a liquid inlet pool and a recovery pool, and provides a magnetic suction cup in the liquid inlet pool. The magnetic suction cup is driven to rotate by a motor. During the rotation, the magnetic suction cup absorbs the magnetic catalyst in the liquid inlet pool, and when it rotates to the scraper position, the scraper scrapes the magnetic catalyst into the recovery pool, thereby recovering the magnetic catalyst.

[0004] However, this patent requires a motor to continuously drive the magnetic turntable to rotate, which increases energy consumption, and requires the installation of two independent pool bodies, which takes up relatively large space and increases costs. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a wastewater treatment system to solve the technical problems in the prior art that when the sewage treatment device realizes the recovery and utilization of the magnetic catalyst, a motor is required to continuously drive the magnetic turntable to rotate, which increases energy consumption and requires the setting of two independent pool bodies, resulting in relatively high costs.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] The utility model provides a wastewater treatment system, comprising:

[0008] reaction tank;

[0009] A recovery tank having a water inlet and a water outlet, and a return port on its bottom wall, wherein the return port is located between the water inlet and the water outlet, and the bottom wall of the recovery tank is inclined downward from an end close to the water inlet to an end close to the return port;

[0010] a water inlet pipe, connecting the water inlet and the reaction tank;

[0011] a return pipe connecting the return port and the reaction tank; and

[0012] The magnetic attraction device is arranged at the bottom of the recovery pool and is located between the water inlet and the return port.

[0013] In some embodiments, the arrangement direction of the water inlet and the water outlet is a first direction;

[0014] A return hopper is recessed downwardly on the bottom wall of the recovery tank, the return hopper is located between the water inlet and the water outlet, and extends in a direction intersecting with the first direction;

[0015] The return port is arranged at the bottom of the return hopper.

[0016] In some embodiments, the bottom wall of the recovery tank is tilted downward from one end close to the water inlet to one end close to the return hopper, and the tilt angle is α;

[0017] The return hopper is arranged to be gradually reduced from top to bottom, and the inclination angle of the side wall thereof close to the water inlet is β, satisfying β>α.

[0018] In some embodiments, the inclination angle α of the bottom wall of the recovery tank located between the water inlet and the return hopper satisfies 1°≤α≤5°.

[0019] In some embodiments, the water inlet and the water outlet are located on opposite sides of the recovery tank, and the return hopper is located on the bottom wall of the recovery tank near the water outlet; and / or,

[0020] The water outlet is located above the water inlet.

[0021] In some embodiments, the water inlet is provided in plurality, and the plurality of water inlets are arranged at intervals along the extension direction of the return hopper;

[0022] The water inlet pipe is connected to the multiple water inlets.

[0023] In some embodiments, the water inlet flow rate of the recovery tank is q, and the volume of the return hopper is V, satisfying V=qt;

[0024] Wherein, t is the preset time for water inflow into the recovery pool, which satisfies 10min≤t≤30min;

[0025] The unit of the water inlet flow rate q of the recovery tank is L / min;

[0026] The unit of the volume V of the return hopper is L.

[0027] In some embodiments, the recovery tank is provided with a plurality of said water inlet pipes, said return pipes and said magnetic devices are provided with a plurality of said water inlet pipes, said return pipes and said magnetic devices, each of said water inlet pipes is connected to said reaction tank and said corresponding water inlet, each of said return pipes is connected to said reaction tank and said corresponding return port, and said magnetic devices are provided at the bottom of said corresponding recovery tank;

[0028] The wastewater treatment system further comprises a plurality of water inlet valves, and the plurality of water inlet valves are respectively arranged on the plurality of water inlet pipes.

[0029] In some embodiments, the communication port between the water inlet pipe and the reaction tank is located above the water inlet;

[0030] The wastewater treatment system further comprises a return pump and a return valve, and the return pump and the return valve are arranged on the return pipe.

[0031] In some embodiments, the bottom of the reaction tank is provided with a plurality of water inlets spaced apart in the horizontal direction;

[0032] The wastewater treatment system further comprises a water delivery pipe, wherein the water delivery pipe is connected to the plurality of water delivery ports;

[0033] The return pipe is connected to the water pipe.

[0034] Compared with the prior art, in the wastewater treatment system provided by the present invention, the water inlet pipe transports the solution in the reaction tank to the recovery tank. After the solution enters the recovery tank, it flows in the direction of the water inlet, the return port and the water outlet in sequence. During the flow of the solution, the magnetic catalyst therein can sink to the bottom wall of the recovery tank under the action of gravity and the magnetic attraction of the magnetic attraction device; because the bottom wall of the recovery tank is tilted in the direction close to the return port, the magnetic catalyst on the bottom wall of the recovery tank can flow to the return port under the push of its own weight and water flow, and finally enter the reaction tank again through the return pipe, thereby realizing the recycling of the magnetic catalyst. In this way, without affecting the operation of the original reaction tank, the magnetic catalyst in the effluent can be separated and recovered by utilizing the combined action of gravity sedimentation and magnetic attraction. The recovered magnetic catalyst enters the reaction tank through the pipeline, reducing the power consumption and catalyst addition cost in the operation process, thereby reducing the operation cost of the project and achieving the purpose of reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of a wastewater treatment system provided by an embodiment of the present utility model;

[0036] Figure 2 yes Figure 1 Schematic diagram of the recycling pool;

[0037] Figure 3 yes Figure 2 A top view of the recovery tank.

[0038] Description of reference numerals:

[0039] 1. Reaction tank; 11. Water inlet; 2. Recovery tank; 21. Water inlet; 22. Water outlet; 23. Return port; 24. Return hopper; 25. Water outlet pipe; 3. Water inlet pipe; 4. Return pipe; 5. Magnetic suction device; 6. Water inlet valve; 7. Return pump; 8. Return valve; 9. Water pipe. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] In order to solve the technical problems in the prior art that the sewage treatment device needs a motor to continuously drive the magnetic turntable to rotate when realizing the recovery and utilization of the magnetic catalyst, which increases energy consumption and requires the setting of two independent pool bodies, resulting in relatively high costs, the utility model provides a wastewater treatment system that can reduce the power consumption and catalyst addition costs during operation and treatment, thereby reducing the operating costs of the project and achieving the purpose of reducing costs and increasing efficiency.

[0042] See also Figures 1 to 3 , Figure 1 This is a structural schematic diagram of a wastewater treatment system in an embodiment of the present invention, wherein the wastewater treatment system includes a reaction tank 1, a recovery tank 2, a water inlet pipe 3, a return pipe 4 and a magnetic attraction device 5; the recovery tank 2 has a water inlet 21 and a water outlet 22, and a return port 23 is provided on its bottom wall, the return port 23 is located between the water inlet 21 and the water outlet 22, and the bottom wall of the recovery tank 2 is inclined downward from one end close to the water inlet 21 to the end close to the return port 23; the water inlet pipe 3 connects the water inlet 21 and the reaction tank 1; the return pipe 4 connects the return port 23 and the reaction tank 1; the magnetic attraction device 5 is provided at the bottom of the recovery tank 2 and is located between the water inlet 21 and the return port 23.

[0043] In the wastewater treatment system provided by the present invention, the water inlet pipe 3 transports the solution in the reaction tank 1 to the recovery tank 2. After the solution enters the recovery tank 2, it flows in the direction of the water inlet 21, the return port 23 and the water outlet 22 in sequence. During the flow of the solution, the magnetic catalyst therein can sink to the bottom wall of the recovery tank 2 under the action of gravity and the magnetic attraction of the magnetic attraction device 5. Since the bottom wall of the recovery tank 2 is inclined in the direction close to the return port 23, the magnetic catalyst on the bottom wall of the recovery tank 2 can flow to the return port 23 under the force of its own weight and the push of the water flow, and finally enter the reaction tank 1 again through the return pipe 4, thereby realizing the recycling of the magnetic catalyst. In this way, without affecting the operation of the original reaction tank 1, the magnetic catalyst in the effluent can be separated and recovered by utilizing the combined action of gravity sedimentation and magnetic attraction. The recovered magnetic catalyst enters the reaction tank 1 through the pipeline, reducing the power consumption and catalyst addition cost in the operation process, thereby reducing the operation cost of the project and achieving the purpose of reducing costs and increasing efficiency.

[0044] In one embodiment, see Figure 2 and Figure 3 The arrangement direction of the water inlet 21 and the water outlet 22 is the first direction; the bottom wall of the recovery pool 2 is recessed downwardly with a return hopper 24, which is located between the water inlet 21 and the water outlet 22 and extends in a direction intersecting with the first direction; the return port 23 is provided at the bottom of the return hopper 24.

[0045] In this embodiment, a return hopper 24 is provided at the bottom wall of the recovery tank 2. This ensures that the magnetic catalyst in the solution in the recovery tank 2 effectively falls into the return hopper 24 as it flows toward the water outlet 22, thereby improving the recovery efficiency of the magnetic catalyst. Specifically, in this embodiment, the extension direction of the upper opening of the return hopper 24 intersects the first direction. In the example drawings, the extension direction of the upper opening of the return hopper 24 is indicated by F. In addition, the water outlet 22 is connected to the water outlet pipe 25.

[0046] In one embodiment, the bottom wall of the recovery tank 2 is tilted downward from one end close to the water inlet 21 to one end close to the return hopper 24, and its tilt angle is α; the return hopper 24 is gradually tapered from top to bottom, and the tilt angle of its side wall close to the water inlet 21 is β, satisfying β>α.

[0047] In this embodiment, the inclination angle of the side wall of the return hopper 24 is set to be greater than the inclination angle of the recovery tank 2 at the water inlet 21 and the bottom wall of the return hopper 24, so as to accelerate the rate at which the magnetic catalyst deposited on the bottom wall of the recovery tank 2 enters the return hopper 24, thereby improving the recovery efficiency of the magnetic catalyst.

[0048] In one embodiment, the inclination angle α of the bottom wall of the recovery tank 2 between the water inlet 21 and the return hopper 24 satisfies 1°≤α≤5°.

[0049] In this embodiment, the inclination angle of the bottom wall of the recovery tank 2 between the water inlet 21 and the return hopper 24 is set to 1° to 5°, so that the magnetic catalyst can be buffered and stably entered into the return hopper 24 under the force of its own weight and the water flow. Specifically, in this solution, α is set to 2°.

[0050] In one embodiment, the water inlet 21 and the water outlet 22 are located on opposite sides of the recovery tank 2 , and the return hopper 24 is located on the bottom wall of the recovery tank 2 near the water outlet 22 ; the water outlet 22 is located above the water inlet 21 .

[0051] In this embodiment, the water inlet 21 and the water outlet 22 are arranged opposite to each other to extend the flow path of the solution in the recovery tank 2, so that the magnetic catalyst entrained in the solution effectively falls into the return hopper 24 under the action of its own weight and magnetic attraction, further improving the recovery efficiency of the magnetic catalyst.

[0052] In one embodiment, see Figure 3 There are multiple water inlets 21, and the multiple water inlets 21 are arranged at intervals along the extending direction of the return hopper 24; the water inlet pipe 3 connects the multiple water inlets 21.

[0053] In this embodiment, multiple water inlets 21 are provided to divert the flow and reduce the flow rate of the water entering the recovery tank 2, so that the magnetic catalyst in the water can fall into the return hopper 24 as much as possible. In other words, by optimizing the water distribution system of the recovery tank 2, the precipitation effect of the magnetic catalyst is improved.

[0054] In one embodiment, the water inlet flow rate of the recovery pool 2 is q, and the volume of the return hopper 24 is V, satisfying V=qt; wherein t is the preset time for water inlet to the recovery pool 2, satisfying 10min≤t≤30min; the unit of the water inlet flow rate q of the recovery pool 2 is L / min; the unit of the volume V of the return hopper 24 is L.

[0055] In this embodiment, to ensure the recovery rate of the magnetic catalyst, the volume of return hopper 24 in recovery tank 2 is set to meet the capacity corresponding to 10 to 30 minutes of water flow in recovery tank 2, thereby facilitating the sedimentation of the magnetic catalyst in the hopper. Specifically, in this embodiment, the volume of return hopper 24 is the capacity corresponding to 10 minutes of water flow in recovery tank 2.

[0056] In one embodiment, there are multiple recovery pools 2, and multiple water inlet pipes 3, return pipes 4 and magnetic devices 5 are respectively provided. Each water inlet pipe 3 is connected to the reaction pool 1 and the corresponding water inlet 21, and each return pipe 4 is connected to the reaction pool 1 and the corresponding return port 23. The magnetic device 5 is arranged at the bottom of the corresponding recovery pool 2; the wastewater treatment system also includes multiple water inlet valves 6, and the multiple water inlet valves 6 are respectively arranged on the multiple water inlet pipes 3.

[0057] In this embodiment, in order to ensure the recovery rate of the magnetic catalyst, the recovery pool 2 is set as multiple small pools in parallel, and the small pools are alternately filled with water through valves. Some small pools are filled with water, and some small pools are left to settle, thereby reducing the operating power consumption while ensuring the recovery efficiency of the magnetic catalyst.

[0058] It should be noted that, in one embodiment, the water inlet valve 6 is provided with an electromagnetic valve, and the magnetic device 5 is provided with an electromagnetic adsorption device, such as a magnetic separator, and is located below the bottom wall of the recovery tank 2, so that the opening of the electric solenoid valve can be flexibly adjusted according to actual needs, and the magnetic force of the electromagnetic adsorption device can be adjusted according to the flow conditions. The specific structure and principle of the electromagnetic adsorption device are prior art and will not be elaborated here. In addition, specifically, in this solution, the recovery tank 2, the water inlet pipe 3, the return pipe 4 and the magnetic device 5 are respectively provided in two groups in parallel.

[0059] In one embodiment, the connecting port between the water inlet pipe 3 and the reaction tank 1 is located above the water inlet 21 ; the wastewater treatment system further includes a return pump 7 and a return valve 8 , which are arranged on the return pipe 4 .

[0060] In this embodiment, the connection between the water inlet pipe 3 and the reaction tank 1 is placed above the water inlet 21, allowing the water in the reaction tank 1 to enter the recovery tank 2 under its own weight. The magnetic catalyst in the return hopper 24 is then pumped into the reaction tank 1 by the return pump 7. It should be noted that in one embodiment, a pump body can also be provided on the water inlet pipe 3. In addition, the return valve 8 is also configured as a solenoid valve.

[0061] In one embodiment, a plurality of water inlets 11 are horizontally spaced apart at the bottom of the reaction tank 1 ; the wastewater treatment system further comprises a water pipe 9 , which connects the plurality of water inlets 11 ; and the return pipe 4 is connected to the water pipe 9 .

[0062] In this embodiment, the return pipe 4 is connected to the water pipe 9. With the cooperation of the return pump 7 and the return valve 8, the recovered magnetic catalyst can pass through the pipeline and automatically mix with the water in the reaction tank 1, realizing fully automatic operation.

[0063] In order to better understand the present invention, the following Figures 1 to 3 The technical solution of the utility model is described in detail:

[0064] After the magnetic catalyst reacts in reaction tank 1, the effluent flows through pipes into recovery tank 2. Two recovery tanks 2 are connected in parallel, and the effluent flows into each of the two recovery tanks 2 through two inlet pipes 3. Each inlet pipe 3 is equipped with a solenoid valve to control the pipe's opening and closing. The effluent from the inlet pipes 3 flows into the recovery tank through a water distribution system consisting of multiple water inlets 21 on the recovery tank 2, which reduces the flow rate of the effluent entering the tank.

[0065] The bottoms of the two recovery tanks 2 are inclined at an angle of approximately 2°, allowing incoming water to flow by gravity into the return hopper 24 of each recovery tank 2. The volume of the return hopper 24 corresponds to the capacity of the incoming water flow of the recovery tank 2 for 10 minutes. A magnetic attraction device 5 is installed under the inclined bottom of each recovery tank 2, and its on / off control is controlled by an automatic control system.

[0066] When the solenoid valve on one water inlet pipe 3 is open, the solenoid valve on the other water inlet pipe 3 is closed. Simultaneously, the magnetic attraction device 5 associated with the recovery tank 2 with the open solenoid valve on the corresponding water inlet pipe 3 is in operation, while the magnetic attraction device 5 associated with the recovery tank 2 with the closed solenoid valve on the corresponding water inlet pipe 3 is disconnected. At this point, the recovery tank 2 with the closed magnetic attraction device 5 no longer receives water. The water that has entered the tank settles in the return hopper 24 for 20 minutes. The solenoid valve on the return pipe 4 then opens, returning the magnetic catalyst that has settled in the return hopper 24 of the recovery tank 2 to the water delivery pipe 9 via the return pump 7.

[0067] The solenoid valves on the two water inlet pipes 3 are opened alternately, each operating time is set to 30 minutes, and the cycle is alternating. The reaction pool 1 continuously and stably discharges water, and the recovery pool 2 operates alternately to achieve the separation and reuse of the magnetic catalyst.

[0068] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A wastewater treatment system, characterized in that: include: reaction tank; A recovery tank having a water inlet and a water outlet, and a return port on its bottom wall, wherein the return port is located between the water inlet and the water outlet, and the bottom wall of the recovery tank is inclined downward from an end close to the water inlet to an end close to the return port; a water inlet pipe, connecting the water inlet and the reaction tank; A return pipe connecting the return port and the reaction tank; and The magnetic attraction device is arranged at the bottom of the recovery pool and is located between the water inlet and the return port.

2. The wastewater treatment system according to claim 1, characterized in that The arrangement direction of the water inlet and the water outlet is a first direction; A return hopper is recessed downwardly on the bottom wall of the recovery tank, the return hopper is located between the water inlet and the water outlet, and extends in a direction intersecting with the first direction; The return port is arranged at the bottom of the return hopper.

3. The wastewater treatment system according to claim 2, characterized in that The bottom wall of the recovery tank is tilted downward from one end close to the water inlet to one end close to the return hopper, and the tilt angle is α; The return hopper is arranged to be gradually reduced from top to bottom, and the inclination angle of the side wall thereof close to the water inlet is β, satisfying β>α.

4. The wastewater treatment system according to claim 3, characterized in that The inclination angle α of the bottom wall of the recovery tank located between the water inlet and the return hopper satisfies 1°≤α≤5°.

5. The wastewater treatment system according to claim 2, characterized in that: The water inlet and the water outlet are located on two opposite sides of the recovery tank, and the return hopper is located on the bottom wall of the recovery tank near the water outlet; and / or, The water outlet is located above the water inlet.

6. The wastewater treatment system according to claim 2, characterized in that: There are multiple water inlets, and the multiple water inlets are spaced apart along the extension direction of the return hopper; The water inlet pipe is connected to the multiple water inlets.

7. The wastewater treatment system according to claim 2, characterized in that: The water flow rate of the recovery pool is q, and the volume of the return hopper is V, satisfying V=qt; Wherein, t is the preset time for water inflow into the recovery pool, which satisfies 10min≤t≤30min; The unit of the water inlet flow rate q of the recovery tank is L / min; The unit of the volume V of the return hopper is L.

8. The wastewater treatment system according to claim 1, characterized in that: There are multiple recovery tanks, and multiple water inlet pipes, return pipes and magnetic devices are respectively provided. Each water inlet pipe is connected to the reaction tank and the corresponding water inlet, and each return pipe is connected to the reaction tank and the corresponding return port. The magnetic device is provided at the bottom of the corresponding recovery tank; The wastewater treatment system further comprises a plurality of water inlet valves, and the plurality of water inlet valves are respectively arranged on the plurality of water inlet pipes.

9. The wastewater treatment system according to claim 8, characterized in that: The communication port between the water inlet pipe and the reaction tank is located above the water inlet; The wastewater treatment system further comprises a return pump and a return valve, and the return pump and the return valve are arranged on the return pipe.

10. The wastewater treatment system according to claim 1, wherein: The bottom of the reaction tank is provided with a plurality of water inlets at intervals along the horizontal direction; The wastewater treatment system further comprises a water delivery pipe, wherein the water delivery pipe is connected to the plurality of water delivery ports; The return pipe is connected to the water pipe.

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