Total phosphorus adsorption and removal device for advanced treatment of water body

Abstract

The utility model discloses a water body advanced treatment total phosphorus adsorption removal device which comprises a reaction tank used for carrying out flocculation reaction and a magnetic powder separation channel which is used for realizing magnetic flocculating constituent separation and is flat on the whole, and a blow-off pipe used for discharging sewage formed in the reaction tank is further arranged at the bottom of the reaction tank. At least two magnetic powder separation channels are arranged at intervals along the flow direction of the blow-off pipe, and the upper side or the lower side of each magnetic powder separation channel is provided with a magnet for separating the magnetic flocculating constituent from the water body. The device is suitable for advanced treatment of a water body, the magnetic powder separation channels with the magnets are arranged on the blow-off pipe, so that when magnetic floccules enter the magnetic powder separation channels, the magnets can adsorb magnetic powder in the magnetic floccules to the inner walls of the magnetic powder separation channels, and meanwhile, the multiple magnetic powder channels are arranged, so that the magnetic powder in the magnetic floccules can be separated from the magnetic powder separation channels; therefore, the separation of the magnetic flocculating constituent and the water body can be effectively ensured, and the total phosphorus concentration of the water body can be reduced to 0.1 mg / L or below without arranging a sedimentation tank.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment devices, and in particular relates to a total phosphorus adsorption and removal device for deep treatment of water bodies. Background Art

[0002] Usually, the total phosphorus content in treated sewage is no more than 0.5 mg / L. In order to meet the A standard in the first level standard of the "Integrated Sewage Discharge Standard", deep treatment will be used to reduce the total phosphorus content in the sewage to below 0.1 mg / L (or even 0.05 mg / L).

[0003] Magnetic flocculation sedimentation technology involves adding magnetic powder and flocculants during the flocculation process. This allows the magnetic powder to combine with suspended solids to form magnetic flocs, which are more easily precipitated at high speeds, thereby improving sedimentation efficiency and facilitating rapid wastewater treatment. However, during the sedimentation process, the upper layer of liquid in the sedimentation tank is drained, and some of the magnetic flocs are carried along with the liquid into subsequent treatment, resulting in poor total phosphorus removal. Utility Model Content

[0004] The utility model proposes a total phosphorus adsorption removal device for deep water treatment. In the deep water treatment, it can effectively remove the magnetic flocculants after the flocculation reaction, thereby facilitating the removal of total phosphorus in sewage and the subsequent recovery and reuse of magnetic powder, without the need to set up a sedimentation tank.

[0005] To this end, the technical solution adopted by the utility model is: a total phosphorus adsorption and removal device for deep treatment of water bodies, including a reaction tank for flocculation reaction and a magnetic powder separation channel which is flat as a whole and is used to separate magnetic flocs. The bottom of the reaction tank is also provided with a sewage pipe for discharging sewage formed in the reaction tank. At least two magnetic powder separation channels are arranged at intervals along the flow direction of the sewage pipe, and a magnet is provided on the upper or lower side of each magnetic powder separation channel for separating magnetic flocs from water bodies.

[0006] As a preferred embodiment of the above solution, the width of the magnetic powder separation channel gradually increases along the flow direction of the sewage pipe, while the height remains unchanged.

[0007] Further preferably, the reaction tank is divided into a mixing tank and a flocculation tank by a middle partition, the inlet for sewage to enter the reaction tank is set at the upper end of the mixing tank, the height of the middle partition is lower than the height of the four sides of the reaction tank, and the bottom of the mixing tank and the flocculation tank are both provided with an emptying pipe for connecting to the sewage pipe.

[0008] Further preferably, the magnetic powder separation channel is configured as a rectangular parallelepiped channel as a whole, and the thickness does not exceed 10 mm.

[0009] More preferably, the magnet is a permanent magnet or an energized electromagnet.

[0010] Further preferably, the sewage pipe is located between the magnetic powder separation channel and the reaction tank and is provided with a shut-off valve and a regulating valve for starting sewage discharge and regulating sewage flow, and the sewage pipe is located at the rear side of the magnetic powder separation channel and is provided with a sewage pump for driving the sewage flow in the sewage pipe.

[0011] More preferably, a stirring device with adjustable rotation speed is provided in the reaction tank.

[0012] The beneficial effects of the utility model are as follows: it is suitable for deep treatment of water bodies. By arranging a magnetic powder separation channel with a magnet on the sewage pipe, when the magnetic flocs enter the magnetic powder separation channel, the magnet can adsorb the magnetic powder in the magnetic flocs on the inner wall of the magnetic powder separation channel. At the same time, multiple magnetic powder channels are arranged, thereby effectively ensuring the separation of the magnetic flocs and the water body, so that the total phosphorus concentration of the water body can be reduced to below 0.1 mg / L (or even 0.05 mg / L) without the need to set up a sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the utility model.

[0014] Figure numerals: reaction tank-1, middle partition-1a, mixing tank-1b, flocculation tank-1c, inlet-1d, sewage pipe-2, magnetic powder separation channel-3, magnet-4, drain pipe-5, stop valve-6, regulating valve-7, sewage pump-8. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the following embodiments and accompanying drawings:

[0016] like Figure 1 As shown, a total phosphorus adsorption removal device for deep treatment of water bodies is mainly composed of a reaction tank 1, a sewage pipe 2, a magnetic powder separation channel 3 and a magnet 4. The reaction tank is mainly used to realize flocculation reaction after adding flocculants and magnetic powder after sewage enters. The sewage pipe 2 is set at the bottom of the reaction tank 1 to discharge the sewage formed in the reaction tank 1.

[0017] The magnetic powder separation channel 3 is flat and is used to separate magnetic flocs. At least two magnetic powder separation channels 3 are spaced apart along the flow direction of the sewage pipe. A magnet 4 is positioned above or below each magnetic powder separation channel 3 to separate the magnetic flocs from the water. Preferably, the magnetic powder separation channel 3 gradually increases in width along the flow direction of the sewage pipe, while maintaining a constant height.

[0018] A stirring device with adjustable speed is provided in the reaction tank, wherein the stirring device is a prior art. When the flocculant is added into the reaction tank, the stirring device stirs rapidly for a certain period of time so that the flocculant can be evenly dispersed in the water to be treated, and then switches to slow stirring to allow the flocs to better combine.

[0019] The reaction tank 1 is divided into a mixing tank 1b and a flocculation tank 1c by a middle partition 1a. A stirring device is provided in both the mixing tank 1b and the flocculation tank 1c. At this time, the mixing tank is stirred rapidly, and the flocculation tank is stirred slowly.

[0020] To facilitate the entry of the water to be treated, an inlet 1d for sewage entry is provided in the reaction tank 1 at the upper end of the mixing tank 1b on the side opposite the middle partition. An outlet for the supernatant to flow out can also be provided above the side of the flocculation tank away from the middle partition. Of course, other water inlet and outlet methods can also be used, such as providing the mixing tank on the side opposite the middle partition and the flocculation tank on the side opposite the middle partition at a lower height so that water can flow in and out by overflow.

[0021] To facilitate overflow of water from the mixing tank into the flocculation tank, the height of the middle partition 1a is lower than the height of the four sides of the reaction tank 1. A serrated notch may also be provided on the middle partition. To facilitate the removal of sediment from the mixing and flocculation tanks, drain pipes 5 are provided at the bottom of both mixing and flocculation tanks 1b and 1c, communicating with the sewage pipe 2.

[0022] Preferably, the magnetic powder separation channel 3 is a rectangular parallelepiped channel with a thickness not exceeding 10 mm. It can be made of stainless steel to facilitate placement of the outer magnets. In this embodiment, two magnetic powder separation channels are provided, with dimensions of 500 mm × 40 mm × 10 mm and 500 mm × 100 mm × 10 mm, respectively.

[0023] Magnet 4 can be a permanent magnet or an energized electromagnet. The advantage of a permanent magnet is that it does not consume electricity. The advantage of an electro-permanent magnet is that the magnet can be controlled to be magnetized and demagnetized by a controller, facilitating subsequent processing of the magnetic flocs. Preferably, the magnet strength is no less than 2000 gauss.

[0024] In order to ensure the smooth discharge of sewage from the sewage pipe, a stop valve 6 and a regulating valve 7 for starting sewage discharge and regulating the sewage flow are provided on the sewage pipe 2 between the magnetic powder separation channel and the reaction tank 1. A sewage pump 8 for driving the flow of sewage in the sewage pipe 2 is provided on the rear side of the magnetic powder separation channel 3.

[0025] When the structure of the present application is used for deep water treatment, the magnetic flocculants in the magnetic powder separation channel need to be cleaned regularly. At the same time, to facilitate the cleaning of the magnetic powder separation channel, the magnetic powder separation channel can also be set as a structure with front and back sealed and buckled together.

Claims

1. A device for removing total phosphorus by adsorption in deep treatment of water, comprising a reaction tank (1) for performing a flocculation reaction, wherein a drain pipe (2) is provided at the bottom of the reaction tank (1) for discharging flocs formed in the reaction tank (1), and wherein: The invention also includes a magnetic powder separation channel (3) for realizing separation of magnetic flocs and having an overall flat shape, wherein at least two magnetic powder separation channels (3) are arranged at intervals along the flow direction of the sewage pipe, and a magnet (4) for realizing separation of magnetic flocs from water is arranged on the upper side or the lower side of each magnetic powder separation channel (3).

2. The device for removing total phosphorus by adsorption in deep treatment of water according to claim 1, characterized in that: The width of the magnetic powder separation channel (3) gradually increases along the flow direction of the sewage pipe, while the height remains unchanged.

3. The device for removing total phosphorus by adsorption in deep treatment of water according to claim 1, characterized in that: The reaction tank (1) is divided into a mixing tank (1b) and a flocculation tank (1c) by a middle partition (1a); an inlet (1d) for sewage to enter the reaction tank (1) is arranged at the upper end of the mixing tank (1b); the height of the middle partition (1a) is lower than the height of the four sides of the reaction tank (1); and the bottoms of the mixing tank (1b) and the flocculation tank (1c) are both provided with an emptying pipe (5) for communicating with a sewage discharge pipe (2).

4. The device for removing total phosphorus by adsorption in deep treatment of water according to claim 1, characterized in that: The magnetic powder separation channel (3) is configured as a rectangular parallelepiped channel as a whole, and the thickness thereof does not exceed 10 mm.

5. The device for removing total phosphorus by adsorption in deep treatment of water according to claim 1, characterized in that: The magnet (4) is a permanent magnet or an energized electromagnet.

6. The device for removing total phosphorus by adsorption in deep treatment of water according to claim 1, characterized in that: The sewage pipe (2) is located between the magnetic powder separation channel (3) and the reaction tank (1) and is provided with a stop valve (6) and a regulating valve (7) for starting sewage discharge and regulating the sewage discharge flow rate. The sewage pipe (2) is located at the rear side of the magnetic powder separation channel (3) and is provided with a sewage pump (8) for driving the sewage in the sewage pipe (2) to flow.

7. The device for removing total phosphorus by adsorption in deep treatment of water according to claim 1, characterized in that: The reaction tank (1) is provided with a stirring device capable of adjusting the rotation speed.

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