Domestic sewage treatment device with continuous pulse electric flocculation reaction sedimentation tank

Abstract

The utility model discloses a domestic sewage treatment device with a continuous pulse electric flocculation reaction sedimentation tank, which relates to the technical field of domestic sewage treatment sedimentation tanks and comprises a sewage treatment tank, the sewage treatment tank comprises a pretreatment tank, an electric flocculation tank, a water outlet tank and a sedimentation sewage discharge tank which are communicated with one another, and a continuous pulse electric flocculation reaction component is arranged in the electric flocculation tank. According to the utility model, the metal anode plate in the pulse electric flocculation technology is arranged to be wave-shaped, so that the contact area is increased, and the flocculation reaction is promoted; the water flow state is optimized, the water flow is guided to generate vortex and turbulent flow, diffusion and mixing of suspended solids are facilitated, and the flocculation efficiency is improved; due to the design of the wave shape, the scouring effect of water flow on the sediment can be reduced, and the sediment effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of sedimentation tanks for domestic sewage treatment, in particular to a domestic sewage treatment device for a continuous pulse electrocoagulation reaction sedimentation tank. Background Art

[0002] Domestic sewage is the wastewater discharged in residents' daily life, mainly from residential buildings and public buildings, such as houses, institutions, schools, hospitals, shops, public places and the toilets of industrial enterprises. At present, the continuous pulse electrocoagulation technology is adopted for the sewage treatment of sedimentation tanks for domestic sewage treatment; mainly using the electrochemical principle, by applying a high-voltage pulsed current externally, the metal anode (such as aluminum, iron, etc.) is oxidized and dissolved to generate metal cations. These metal cations combine with the hydroxide ions in the solution to form metal hydroxides (such as aluminum hydroxide, iron hydroxide, etc.) flocculants with strong adsorption ability. These flocculants can adsorb suspended solids, heavy metal ions and colloidal substances in the water to form larger particles, and then realize solid-liquid separation through gravity in the sedimentation tank.

[0003] At present, some metal plates in continuous pulse electrocoagulation are arranged horizontally or vertically in the sedimentation tank. This arrangement method makes the metal plates unable to provide more surface area in a limited space, so that the suspended solids and metal cations in the sewage cannot fully contact and collide, and it is not conducive to the diffusion and mixing of suspended solids, with great limitations. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the limitation of the arrangement of metal plates in continuous pulse electrocoagulation in the prior art, and to propose a domestic sewage treatment device for a continuous pulse electrocoagulation reaction sedimentation tank.

[0005] In order to solve the problems existing in the prior art, the utility model adopts the following technical scheme:

[0006] A domestic sewage treatment device for a continuous pulse electrocoagulation reaction sedimentation tank, including a sewage treatment tank, the sewage treatment tank includes a pretreatment tank, an electrocoagulation tank, an effluent tank and a sedimentation and sewage discharge tank which are connected in communication, and a continuous pulse electrocoagulation reaction assembly is arranged in the electrocoagulation tank;

[0007] The continuous pulse electrocoagulation reaction assembly includes metal plates distributed in a wavy shape inside the electrocoagulation tank, fixing pieces are sleeved at the four corners of the metal plates, the fixing pieces are fixedly arranged on the inner wall of the electrocoagulation tank, a plurality of sealing tubes are fixedly arranged on the metal plates, electrode plates fixedly connected with the metal plates are arranged in the sealing tubes, electric wires are connected to the electrode plates, and the electric wires are arranged along the inside of the sealing tubes.

[0008] Preferably, a fixed plate is provided above the pretreatment tank, a stirring motor is fixed on the fixed plate, a stirring rod is fixed to the output end of the stirring motor, stirring blades are fixed on the stirring rod, and a water inlet pipe is provided on one side of the pretreatment tank.

[0009] Preferably, a connection groove is provided at the connection between the pretreatment tank and the electrocoagulation tank, and a filter screen is fixed in the connection groove.

[0010] Preferably, a drain pipe is fixed to the bottom of the water outlet tank.

[0011] Preferably, the sedimentation and sewage discharge tank is in a W shape, and sewage pipes are fixed to the bottom of the sedimentation and sewage discharge tank.

[0012] Preferably, there is a certain distance between the metal plates, and the metal plates are made of aluminum and iron alloy metal materials.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, by setting the metal anode plate in the pulse electrocoagulation technology into a wavy shape, the contact area is increased, promoting the occurrence of the flocculation reaction; optimizing the water flow pattern, guiding the water flow to generate vortices and turbulence, which helps the diffusion and mixing of suspended substances and improves the flocculation efficiency; promoting sedimentation, the wavy shape design can also reduce the scouring effect of the water flow on the sediment and improve the sedimentation effect;

[0015] 2. In the present utility model, by providing a sealing pipe, the wires and electrode plates are sealed, preventing the electrodes and wires from contacting the sewage, avoiding the corrosion of the electrodes, and improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present utility model, and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0017] Figure 1 is the front view structure schematic diagram of the present utility model;

[0018] Figure 2 is the overall structure schematic diagram of the present utility model;

[0019] Figure 3 is the metal plate structure schematic diagram of the present utility model;

[0020] Figure 4 is the pretreatment tank structure schematic diagram of the present utility model.

[0021] Reference numerals in the figure: 1, sewage treatment tank; 11, pretreatment tank; 12, electrocoagulation tank; 13, effluent tank; 14, sedimentation and sewage discharge tank; 15, metal plate; 16, fixing member; 17, sealing pipe; 18, electrode plate; 19, electric wire; 2, water inlet pipe; 21, fixing plate; 22, stirring motor; 23, stirring rod; 24, stirring blade; 3, connecting groove; 31, filter screen; 4, drain pipe; 5, sewage discharge pipe. Detailed implementation manner

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Embodiment: This embodiment provides a domestic sewage treatment device for a continuous pulsed electrocoagulation reaction sedimentation tank. Refer to Figures 1-4 , specifically, it includes a sewage treatment tank 1. The sewage treatment tank 1 includes a connected pretreatment tank 11, an electrocoagulation tank 12, an effluent tank 13, and a sedimentation and sewage discharge tank 14. A water inlet pipe 2 is provided on one side of the pretreatment tank 11. A drain pipe 4 is fixedly provided at the bottom of the effluent tank 13. The sedimentation and sewage discharge tank 14 is in a W shape, and sewage discharge pipes 5 are fixedly provided at the bottom of the sedimentation and sewage discharge tank 14. A continuous pulsed electrocoagulation reaction assembly is provided in the electrocoagulation tank 12;

[0024] Domestic sewage is sent into the pretreatment tank 11 through the water inlet pipe 2 to adjust the pH value of the sewage to promote the precipitation of metal ions. When the sewage enters the electrocoagulation tank 12, through the continuous pulsed electrocoagulation reaction technology, the generated flocs can adsorb the suspended substances in the water, and solid-liquid separation is achieved through the action of gravity. Finally, the treated water enters the effluent tank 13 and is discharged from the sewage treatment tank 1 through the drain pipe 4;

[0025] The continuous pulsed electrocoagulation reaction assembly includes metal plates 15 distributed in a wavy shape inside the electrocoagulation tank 12. Fixing members 16 are sleeved at the four corners of the metal plates 15, and the fixing members 16 are fixedly arranged on the inner wall of the electrocoagulation tank 12. A plurality of sealing pipes 17 are fixedly provided on the metal plates 15. Electrode plates 18 fixedly connected to the metal plates 15 are provided inside the sealing pipes 17. Electric wires 19 are connected to the electrode plates 18 and are arranged along the inside of the sealing pipes 17. There is a certain distance between the metal plates 15, and the metal plates 15 are made of aluminum and iron alloy metal materials;

[0026] A high-voltage pulsed current is transmitted through the wire 19 to oxidize and dissolve the metal anode (such as aluminum, iron, etc.), generating metal cations. These metal cations combine with hydroxide ions in the solution to form metal hydroxide (such as aluminum hydroxide, iron hydroxide, etc.) flocculants with strong adsorption ability. These flocculants can adsorb suspended solids, heavy metal ions and colloidal substances in water, forming larger particles, and then realizing solid-liquid separation by gravity in the sedimentation tank; a sealing tube 17 is provided to seal the wire 19 to improve safety; by setting the metal plate 15 in a wavy shape, the contact area is increased to promote the occurrence of the flocculation reaction; the water flow pattern is optimized to guide the water flow to generate eddy currents and turbulence, which helps the diffusion and mixing of suspended solids and improves the flocculation efficiency; to promote precipitation, the wavy shape design can also reduce the scouring effect of the water flow on the sediment and improve the precipitation effect.

[0027] In the specific implementation process, such as Figure 1 and Figure 3 As shown, a fixing plate 21 is fixedly provided above the pretreatment tank 11, a stirring motor 22 is fixedly provided on the fixing plate 21, a stirring rod 23 is fixedly provided at the output end of the stirring motor 22, and stirring blades 24 are fixedly provided on the stirring rod 23;

[0028] A regulator is added to the pretreatment tank 11, and then the stirring motor 22 drives the stirring rod 23 and the stirring blades 24 to rotate to adjust the pH value of the domestic sewage to alkaline to promote the precipitation of metal ions.

[0029] In the specific implementation process, such as Figure 1 and Figure 4 As shown, a connection groove 3 is opened at the connection between the pretreatment tank 11 and the electrocoagulation tank 12, and a filter screen 31 is fixedly provided in the connection groove 3; larger impurities are filtered in the pretreatment tank 11 through the filter screen 31 to facilitate the flocculation treatment of the sewage in the electrocoagulation tank 12.

[0030] The above is only a preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A domestic sewage treatment device using a continuous pulse electro-flocculation reaction sedimentation tank, comprising a sewage treatment tank (1), characterized in that: The sewage treatment tank (1) comprises a pretreatment tank (11), an electric flocculation tank (12), a water outlet tank (13) and a sedimentation and sewage discharge tank (14) which are interconnected, and a continuous pulse electric flocculation reaction component is provided in the electric flocculation tank (12); The continuous pulse electro-flocculation reaction component comprises a metal plate (15) distributed in a wave shape inside the electro-flocculation tank (12), the four corners of the metal plate (15) are sleeved with fixing parts (16), the fixing parts (16) are fixedly arranged on the inner wall of the electro-flocculation tank (12), a plurality of sealing tubes (17) are fixedly arranged on the metal plate (15), the sealing tube (17) is provided with an electrode sheet (18) fixedly connected to the metal plate (15), the electrode sheet (18) is connected to an electric wire (19), and the electric wire (19) is arranged along the sealing tube (17).

2. A domestic sewage treatment device using a continuous pulse electro-flocculation reaction sedimentation tank according to claim 1, characterized in that: A fixing plate (21) is fixedly provided above the pretreatment tank (11), a stirring motor (22) is fixedly provided on the fixing plate (21), a stirring rod (23) is fixedly provided at the output end of the stirring motor (22), a stirring blade (24) is fixedly provided on the stirring rod (23), and a water inlet pipe (2) is provided on one side of the pretreatment tank (11).

3. The domestic sewage treatment device of a continuous pulse electro-flocculation reaction sedimentation tank according to claim 1 is characterized in that: A connection groove (3) is provided at the connection between the pretreatment tank (11) and the electric flocculation tank (12), and a filter screen (31) is fixedly provided in the connection groove (3).

4. The continuous pulse electro-flocculation reaction sedimentation tank domestic sewage treatment device according to claim 1 is characterized by: A drainage pipe (4) is fixedly provided at the bottom of the water outlet pool (13).

5. The continuous pulse electro-flocculation reaction sedimentation tank domestic sewage treatment device according to claim 1 is characterized by: The sedimentation and sewage discharge tank (14) is in a W shape, and a sewage discharge pipe (5) is fixedly provided at the bottom of the sedimentation and sewage discharge tank (14).

6. The continuous pulse electro-flocculation reaction sedimentation tank domestic sewage treatment device according to claim 1 is characterized by: There is a certain distance between the metal plates (15), and the metal plates (15) are made of aluminum or iron alloy.

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