Sewage treatment tank

Abstract

The sewage treatment tank comprises a tank body, a rotating shaft is arranged in the tank body, a mixing cavity is formed in the upper portion of the tank body, a filtering cavity is formed in the lower portion of the tank body, a filtering box is arranged in the filtering cavity, the top of the filtering box is open and communicated with the mixing cavity, the rotating shaft extends into the filtering box, and the extending end of the rotating shaft is connected with an anti-blocking structure. The anti-blocking structure is driven by the rotating shaft to move vertically so as to clean the inner wall of the filter box. By arranging the anti-blocking structure, sediments on the inner wall of the filter box can be scraped under the driving of the rotating shaft, so that the sediments are prevented from being attached to the inner wall of the filter box to block the filter holes, and the filter efficiency is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and particularly relates to a sewage treatment tank. Background Art

[0002] The sewage generated during the production of circuit boards usually contains heavy metals (such as copper, lead, cadmium, nickel), organic solvents, acid-base substances and other harmful chemical substances, and must be properly treated before being discharged. The first step in sewage treatment is to remove suspended solids and some precipitable metal ions in the sewage. In this stage, chemical reagents such as flocculants and coagulants need to be added to promote the aggregation of suspended solids and metal ions to form larger flocs for precipitation and filtration. The existing filtering structures mostly use filter meshes. However, limited by the pore size of the filter meshes, as the sediment increases, the filter meshes are prone to clogging, thereby reducing the filtering efficiency. Therefore, during the filtering process, it is necessary to monitor the clogging situation in real time and clean it in time, which greatly increases the workload of the staff. Content of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a sewage treatment tank to solve the problem of filter mesh clogging during the sewage treatment process.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A sewage treatment tank includes a tank body. A rotating shaft is arranged inside the tank body. A mixing chamber is arranged at the upper part of the tank body, and a filtering chamber is arranged at the lower part of the tank body. A filtering box is arranged inside the filtering chamber. The top of the filtering box is open and communicated with the mixing chamber. The rotating shaft extends into the filtering box, and an anti-clogging structure is connected to the extending end of the rotating shaft. The anti-clogging structure makes a vertical movement under the drive of the rotating shaft to clean the inner wall of the filtering box.

[0006] Principle of the utility model:

[0007] In this solution, the sewage generated from the production of circuit boards is mixed with chemical agents in the mixing chamber. The flocculent precipitate generated by the mixing enters the filtering box under the action of gravity for filtration. During the mixing process of the sewage and the chemical agents, the rotating shaft rotates to stir the chemical agents and the sewage evenly. Among them, an anti-clogging structure is connected to one end of the rotating shaft extending into the filtering box. While the rotating shaft rotates, it can also drive the anti-clogging structure to make a vertical movement. When the anti-clogging structure makes a vertical movement, it can brush off the sediment on the inner wall of the filtering box to prevent clogging.

[0008] Compared with the prior art, the beneficial effects of the utility model:

[0009] 1. The anti-blocking structure set in this solution can scrape off the sediment on the inner wall of the filter tank under the drive of the rotating shaft, preventing the sediment from adhering to the inner wall of the filter tank, causing the filter holes to be blocked, and thus reducing the filtration efficiency.

[0010] 2. The anti-blocking device in this solution is driven by the rotating shaft and shares the same power with the structure for stirring chemical agents and sewage, which can greatly save the equipment cost.

[0011] As a preferred embodiment of the present utility model, the anti-blocking structure includes two driving rods that move vertically in the filter tank. The two driving rods are symmetrically arranged on both sides of the rotating shaft. A brushing component is arranged on the two driving rods. Connecting rods are respectively arranged on the side of the two driving rods close to the rotating shaft. The free end of the connecting rod is provided with a slider. The side wall of the rotating shaft is provided with a wavy chute along the circumferential direction. The slider is matched with the chute. In this solution, during the rotation of the rotating shaft, the slider slides in the wavy chute. When the two sliders slide from the trough of the chute to the peak, the slider drives the connecting rod and the driving rod connected to the connecting rod to move upward synchronously. On the contrary, when the two sliders slide from the peak to the trough, the slider drives the connecting rod and the driving rod connected to the connecting rod to move downward synchronously. Therefore, during the rotation of the rotating shaft, the rotating shaft will drive the driving rod to move vertically in a reciprocating manner, and then drive the brushing component to move synchronously to brush the inner wall of the filter tank. In this solution, the anti-blocking structure is simple and can brush the inner wall of the filter tank in real time to avoid blockage of the filter holes.

[0012] As a preferred embodiment of the present utility model, the driving rod is L-shaped. The brushing component includes a number of arc-shaped anti-blocking brushes arranged to match the inner wall of the filter tank. The number of anti-blocking brushes is evenly distributed along the vertical rod of the driving rod in the vertical direction. In this solution, the anti-blocking brushes are set in an arc shape. When the anti-blocking brushes move vertically, they can comprehensively brush the inner wall of the filter tank, and the brushing effect is good.

[0013] As a preferred embodiment of the present utility model, through holes are opened on the horizontal rod of the driving rod. A guide rod is vertically arranged at the bottom of the filter tank. The guide rod passes through the through hole. A limiting block is arranged at one end of the guide rod passing through the through hole. In this solution, by setting the guide rod, the driving rod can be guided to make the driving rod move more smoothly during the vertical reciprocating movement. By setting the limiting block, the driving rod can be prevented from separating from the guide rod, thereby avoiding the failure of the guide rod to guide.

[0014] As a preferred embodiment of the present utility model, the bottom plate of the mixing chamber is funnel-shaped. In this solution, by setting the bottom plate to be funnel-shaped, the slope of the funnel can guide the flocculent sediment so that the flocculent sediment can smoothly flow into the filter tank.

[0015] As a preferred embodiment of the present utility model, stirring blades are provided on the rotating shaft, the stirring blades are placed in the mixing cavity, and a number of strip-shaped holes are opened on the stirring blades. In this solution, by opening strip-shaped holes on the stirring blades, the contact area between the fluid and the stirring blades can be increased, thereby promoting the full mixing and full reaction of the sewage and the chemical agent.

[0016] As a preferred embodiment of the present utility model, a filtrate cavity is formed between the outer side of the filter box and the tank wall, a drain pipe is connected to the lower part of the tank body, and the drain pipe is communicated with the filtrate cavity. In this solution, after the flocculent precipitate enters the filter box, solid-liquid separation is carried out through the filter holes on the filter box, the solid precipitate remains in the filter box, and the filtrate flows into the filtrate cavity and is discharged through the drain pipe.

[0017] As a preferred embodiment of the present utility model, a sewage discharge port is further opened at the lower part of the tank body, the sewage discharge port is communicated with the inside of the filter box, a sewage discharge door is provided at the sewage discharge port, and a sealing ring is provided between the sewage discharge port and the sewage discharge door. In this solution, the solid precipitate in the filter box is discharged from the sewage discharge port, a sewage discharge door is provided at the sewage discharge port, and a sealing ring is provided between the sewage discharge port and the sewage discharge door. By providing the sealing ring, it can be ensured that when the sewage discharge door is closed, the filter box can be kept sealed to prevent the filtrate from flowing out. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0019] Figure 2 is a cross-sectional view of an embodiment of the present utility model;

[0020] Figure 3 is Figure 2 an enlarged view of area A in

[0021] Figure 4 is a schematic structural diagram of the lower part of the tank body in an embodiment of the present utility model;

[0022] Figure 5 is a front view of the rotating shaft in an embodiment of the present utility model;

[0023] Figure 6 is a side view of the rotating shaft in an embodiment of the present utility model.

[0024] The reference numerals include:

[0025] Tank body 1, liquid inlet pipe 2, chemical agent adding pipe 3, drain pipe 4, sewage discharge door 5, rotating shaft 6, stirring blade 7, bottom plate 8, filter box 9, driving rod 10, anti-blocking brush 11, connecting rod 12, slider 13, sliding groove 14, guide rod 15, mixing cavity 16, filtering cavity 17, filtrate cavity 18. Detailed Embodiments

[0026] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes and are not intended to limit the present invention.

[0027] In the description of this application, the terms "top", "bottom", "one end", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships 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 structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0028] See also Figure 1 and Figure 2 As shown, this embodiment discloses a sewage treatment tank, including a tank body 1, a mixing chamber 16 is provided on the upper part of the tank body 1, sewage generated by the production of circuit boards and chemicals are mixed in the mixing chamber 16, a filter chamber 17 is provided at the lower part of the tank body 1, and flocculent precipitation generated by the mixing is filtered in the filter box 9. Specifically, the top of the tank body 1 is connected to a liquid inlet pipe 2 and a dosing pipe 3, sewage flows into the mixing chamber 16 from the liquid inlet pipe 2, and chemicals flow into the mixing chamber 16 from the dosing pipe 3, and the center of the top of the tank body 1 is connected to a rotating shaft 6. The rotating shaft 6 is driven by a motor and extends into the tank body 1. A stirring blade 7 is fixed to the extending portion of the rotating shaft 6. The stirring blade 7 is placed in the mixing chamber 16. After the sewage and the chemical agent are added to the mixing chamber 16, the rotating shaft 6 is driven and the rotating shaft 6 rotates to drive the stirring blade 7 to rotate so as to mix the chemical agent and the sewage evenly. Among them, a plurality of strip holes are opened on the stirring blade 7. By opening the strip holes on the stirring blade 7, the contact area between the fluid and the stirring blade 7 can be increased, thereby promoting a more complete and uniform mixing of the sewage and the chemical agent. A filter box 9 is provided in the filter chamber 17. The top of the filter box 9 is open and connected to the mixing chamber 16. Specifically, the filter box 9 is formed by enclosing a filter screen. The bottom of the filter box 9 is fixed to the bottom of the tank body 1, and the top is fixed to the bottom plate 8 of the mixing chamber 16. The bottom plate 8 of the mixing chamber 16 is funnel-shaped, and the opening at the top of the filter box 9 is connected to the funnel mouth. By setting the bottom plate 8 to a funnel shape, the slope of the funnel can guide the flocculent precipitation so that the flocculent precipitation can smoothly flow into the filter box 9 for filtering treatment.

[0029] Furthermore, an anti-blocking structure is provided in the filter box 9 to prevent the filter box 9 from being blocked. Figure 3As shown in the figure, the anti-blocking structure includes two driving rods 10 that move vertically in the filter box 9. The driving rods 10 are L-shaped, and through holes are formed in the horizontal rods of the driving rods 10. A guide rod 15 is vertically fixed at the bottom of the filter box 9, and the guide rod 15 passes through the through holes to guide the driving rods 10 vertically. A limiting block is fixed at one end of the guide rod 15 passing through the through hole, and the limiting block is used to prevent the driving rod 10 from separating from the guide rod 15 and avoid the failure of the guide. The two driving rods 10 are symmetrically arranged on both sides of the rotating shaft 6. On the side of the two driving rods 10 close to the rotating shaft 6, horizontally arranged connecting rods 12 are respectively fixed. The free ends of the connecting rods 12 are fixed with sliders 13. The lower part of the rotating shaft 6 extends into the filter box 9. Refer to Figure 5 and Figure 6 As shown in the figure, a wavy chute 14 is formed along the circumferential direction on the side wall of the extending part of the rotating shaft 6. During the rotation of the rotating shaft 6, the slider 13 slides in the wavy chute 14. Specifically, when in use, when the two sliders 13 slide from the trough to the peak of the chute 14, the slider 13 drives the connecting rod 12 and the driving rod 10 connected to the connecting rod 12 to move up synchronously. On the contrary, when the two sliders 13 slide from the peak to the trough, the slider 13 drives the connecting rod 12 and the driving rod 10 connected to the connecting rod 12 to move down synchronously. Therefore, during the rotation of the rotating shaft 6, the rotating shaft 6 will drive the driving rod 10 to move vertically in a reciprocating manner. A brushing component is arranged on the two driving rods 10. Specifically, the brushing component includes a number of arc-shaped anti-blocking brushes 11 arranged in cooperation with the inner wall of the filter box 9. The number of anti-blocking brushes 11 is evenly distributed along the vertical direction on the vertical rods of the driving rods 10. When the driving rod 10 moves vertically in a reciprocating manner, the anti-blocking brushes 11 brush the inner wall of the filter box 9 vertically to clean the inner wall of the filter box 9.

[0030] Furthermore, refer to Figure 4 As shown in the figure, a filtrate chamber 18 is formed between the outside of the filter box 9 and the wall of the tank body 1. A drain pipe 4 is connected to the lower part of the tank body 1, and the drain pipe 4 is communicated with the filtrate chamber 18. When the flocculent precipitate enters the filter box 9, the solid precipitate remains in the filter box 9, and the filtrate flows from the filter holes on the filter box 9 into the filtrate chamber 18, and then is discharged through the drain pipe 4.

[0031] Furthermore, a sewage discharge port is also opened at the lower part of the tank body 1. The sewage discharge port is communicated with the inside of the filter box 9 and is used to discharge the solid precipitate in the filter box 9 from the sewage discharge port. Specifically, a notch is opened on one side of the filter box 9, and two connecting plates extend outward from both sides of the notch. The side edges of the connecting plates are fixed on both sides of the sewage discharge port. A sewage discharge door 5 is also installed at the sewage discharge port, and a sealing ring is provided between the sewage discharge port and the sewage discharge door 5. When using this solution, the sewage discharge door 5 is closed, and the set sealing ring can ensure that the filter box 9 can be kept sealed when the sewage discharge door 5 is closed, avoiding the outflow of the filtrate.

[0032] The above embodiments are only the preferred embodiments of the present utility model, and cannot be used to limit the scope of protection of the present utility model. Any non-substantive changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A sewage treatment tank, comprising a tank body, a rotating shaft provided in the tank body, characterized in that: A mixing chamber is provided at the upper part of the tank body, a filter chamber is provided at the lower part of the tank body, a filter box is provided in the filter chamber, the top of the filter box is open and connected to the mixing chamber, the rotating shaft extends into the filter box, and the extending end thereof is connected to an anti-blocking structure, and the anti-blocking structure moves vertically under the drive of the rotating shaft to clean the inner wall of the filter box; the anti-blocking structure includes two driving rods that move vertically in the filter box, the two driving rods are symmetrically arranged on both sides of the rotating shaft, and brush assemblies are provided on the two driving rods, and the two driving rods are respectively provided with connecting rods on the side close to the rotating shaft, and the free end of the connecting rod is provided with a slider, and the side wall of the rotating shaft is provided with a wavy slide groove along the circumferential direction, and the slider cooperates with the slide groove.

2. The sewage treatment tank according to claim 1, characterized in that: The driving rod is L-shaped, and the brushing assembly includes a plurality of anti-blocking brushes arranged on the vertical rod of the driving rod. The plurality of anti-blocking brushes are arranged on one side close to the inner wall of the filter box and are evenly distributed vertically.

3. The sewage treatment tank according to claim 2, characterized in that: A guide rod is vertically arranged at the bottom of the filter box, a through hole is opened on the horizontal rod of the driving rod, the guide rod is passed through the through hole, and a limit block is arranged at one end of the guide rod passing through the through hole.

4. The sewage treatment tank according to claim 1, characterized in that: The bottom plate of the mixing chamber is funnel-shaped.

5. The sewage treatment tank according to claim 1, characterized in that: A stirring blade is arranged on the rotating shaft, the stirring blade is placed in the mixing chamber, and a plurality of strip-shaped holes are opened on the stirring blade.

6. The sewage treatment tank according to claim 1, characterized in that: A filtrate cavity is formed between the outer side of the filter box and the wall of the tank body. A drain pipe is connected to the lower part of the tank body, and the drain pipe is communicated with the filtrate cavity.

7. The sewage treatment tank according to claim 1, characterized in that: The lower part of the tank body is also provided with a sewage outlet, which is communicated with the interior of the filter box. The sewage outlet is provided with a sewage door, and a sealing ring is provided between the sewage outlet and the sewage door.

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