Integrated sedimentation tank

Abstract

The utility model provides an integrated sedimentation tank, which relates to the field of sewage treatment and comprises a tank body, a cover plate is arranged at the top end of the tank body, a guide cylinder is arranged in the middle of the cover plate and positioned inside the tank body, and a notch communicated with the tank body is arranged at the bottom end of the guide cylinder. The inner bottom wall of the tank body is connected with and penetrates through a sludge discharge pipe, and an overflow weir is fixedly mounted on the inner edge of the tank body. According to the integrated sedimentation tank, a coagulant is mixed into sewage through the arranged pipeline mixer and injected into the guide cylinder through the water inlet pipe, a flocculating agent is fed into the sewage through the flocculating agent feeding pipe, the flocculating agent is fully mixed under the stirring of the stirring blades to generate precipitates, the precipitates are discharged to the bottom end of the tank body, and the precipitates are discharged through the periodically opened sludge discharge pipe; after the precipitated water is filtered by the filter layer, the liquid level is higher than the overflow weir, and the precipitated water is discharged to the water outlet pipe from the overflow weir, so that flocculation precipitation and sewage filtration can be carried out in a three-dimensional space, and the land occupied by the device can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an integrated sedimentation tank. Background Technique

[0002] In the current technology, coagulation sedimentation tanks are commonly used processes and are required in most sewage treatment systems. However, the sediment-water separation effect of the sedimentation tank directly affects the effluent quality of the system. Traditional sedimentation tanks include horizontal flow sedimentation tanks and radial flow sedimentation tanks.

[0003] The advantages of a horizontal flow sedimentation tank are simple structure, easy operation and maintenance, and relatively low construction cost. The disadvantages are large floor area: a large space is required for layout, and the treatment efficiency is low.

[0004] The advantages of a radial flow sedimentation tank include large volume, wide applicability, mechanical sludge discharge, good operation, and simple management. Its disadvantages include unstable water flow velocity in the tank, complex mechanical sludge discharge equipment, and high cost.

[0005] The improvement of the prior art is to use an inclined plate sedimentation tank to increase the sedimentation efficiency, but the stability is poor.

[0006] However, at present, most sedimentation tanks will construct the flocculation reaction tank and the sedimentation tank separately, resulting in a large floor area and more land occupation due to separate construction. Content of the Utility Model

[0007] Aiming at the deficiencies of the prior art, the utility model provides an integrated sedimentation tank, which solves the problem of large land occupation of sewage treatment equipment.

[0008] Technical Solution

[0009] To achieve the above objectives, the utility model is realized through the following technical solutions: an integrated sedimentation tank, including a tank body, a cover plate is arranged at the top of the tank body, a draft tube is arranged in the middle of the cover plate, the draft tube is located inside the tank body, a notch communicating with the tank body is arranged at the bottom of the draft tube, a sludge discharge pipe is connected and penetrated through the inner bottom wall of the tank body, an overflow weir is fixedly installed at the inner edge of the tank body, a water outlet pipe is connected and penetrated through the overflow weir, a water inlet pipe is inserted below the overflow weir inside the draft tube, the water inlet pipe extends to the outside of the tank body, one end of the water inlet pipe located outside the tank body is connected and penetrated through a pipe mixer, a flocculant feeding pipe is connected and penetrated through one side of the water inlet pipe inside the draft tube, and a filter layer is arranged between the tank body and the draft tube.

[0010] Further, the filter layer includes a carrier frame, through holes are obliquely and downwardly formed on the surface of the carrier frame, and filter materials are fixedly installed inside the through holes.

[0011] Furthermore, a motor is provided at the top end of the cover plate. The output end of the motor is fixedly installed with a central shaft. Stirring blades are fixedly installed on the outer surface of the central shaft inside the draft tube. The stirring blades are located below the water inlet pipe. A sludge scraping plate is fixedly installed on the surface of the central shaft inside the pool body, and the sludge scraping plate is in contact with the inner bottom wall of the pool body.

[0012] Furthermore, the bottom end of the draft tube is in a convex shape. A speed reducer is fixedly installed at the bottom end of the draft tube. The central shaft is fixedly connected to the input end of the speed reducer. The output end of the speed reducer is connected to and penetrates a rotating shaft. The sludge scraping plate is fixedly installed on the outer surface of the rotating shaft.

[0013] Furthermore, one end of the water inlet pipe inside the draft tube is inclined. The flocculant dosing pipe is parallel to the water inlet pipe and is located on the other side of the inclination.

[0014] Furthermore, the pool body above the filter layer is divided into upper and lower parts. The two parts are connected by a flange. A support ring is fixedly installed inside the pool body below the filter layer.

[0015] Furthermore, the number of the sludge scraping plates is multiple. The multiple sludge scraping plates are distributed in a circular array. A connecting ring is fixedly installed on the inner side of the sludge scraping plate. The connecting ring is fixedly installed on the outer surface of the rotating shaft. The top end of the sludge scraping plate is fixedly connected to the rotating shaft through a towing rope.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. For this integrated sedimentation tank, the coagulant is mixed into the sewage through the provided pipe mixer and injected into the inside of the draft tube through the water inlet pipe. At the same time, the flocculant is put into the sewage through the flocculant dosing pipe. Under the agitation of the stirring blades, it is fully mixed to generate precipitation at the bottom end of the pool body and is discharged through the periodically opened sludge discharge pipe. The precipitated water is filtered through the filter layer, and when the liquid level is higher than the overflow weir, it is discharged from the overflow weir to the outlet pipe. Thus, it can enable the flocculation precipitation and the filtration of sewage to be carried out in a three-dimensional space, thereby reducing the land occupation of the device.

[0018] 2. For this integrated sedimentation tank, the provided filter layer includes a bearing frame. Through holes are obliquely opened downward on the surface of the bearing frame, and filter materials are fixedly installed inside the through holes. Through such a setting, the time for the sewage to pass through the filter materials can be increased, thereby improving the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic half-section view of the present utility model;

[0020] Figure 2 It is a schematic half-section view of the pool body of the present utility model;

[0021] Figure 3Schematic diagram of the internal structure of the pool body of the present utility model in half-section;

[0022] Figure 4 Schematic diagram of the filter layer of the present utility model in half-section.

[0023] Among them, 1. Pool body; 2. Cover plate; 3. Draft tube; 4. Notch; 5. Sludge discharge pipe; 6. Overflow weir; 7. Outlet pipe; 8. Inlet pipe; 9. Pipe mixer; 10. Flocculant dosing pipe; 11. Filter layer; 111. Bearing frame; 112. Through hole; 113. Filter media; 12. Motor; 13. Central shaft; 14. Stirring blade; 15. Scraper; 16. Reducer; 17. Rotating shaft; 18. Flange; 19. Support ring; 20. Connecting ring; 21. Traction rope. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Refer to Figures 1 - 4 , an integrated sedimentation tank, including a pool body 1, a cover plate 2 is provided at the top of the pool body 1, a draft tube 3 is provided in the middle of the cover plate 2, the draft tube 3 is located inside the pool body 1, a notch 4 communicating with the pool body 1 is provided at the bottom end of the draft tube 3, a sludge discharge pipe 5 is connected and penetrated through the inner bottom wall of the pool body 1, an overflow weir 6 is fixedly installed at the inner edge of the pool body 1, an outlet pipe 7 is connected and penetrated through the overflow weir 6, an inlet pipe 8 is inserted below the overflow weir 6 inside the draft tube 3, the inlet pipe 8 extends to the outside of the pool body 1, a pipe mixer 9 is connected and penetrated through one end of the inlet pipe 8 located outside the pool body 1, and a flocculant dosing pipe 10 is connected and penetrated through one side of the inlet pipe 8 inside the draft tube 3, and a filter layer 11 is provided between the pool body 1 and the draft tube 3.

[0026] The filter layer 11 includes a bearing frame 111, through holes 112 are obliquely downwardly formed on the surface of the bearing frame 111, and filter media 113 are fixedly installed inside the through holes 112. Through such a setting, the time for sewage to pass through the filter media 113 can be increased, thereby improving the filtration efficiency.

[0027] At the top of the cover plate 2, there is a motor 12. The output end of the motor 12 is fixedly installed with a central shaft 13. On the outer surface of the central shaft 13 located inside the draft tube 3, there are stirring blades 14 fixedly installed. The stirring blades 14 are located below the water inlet pipe 8. On the outer surface of the central shaft 13 located inside the pool body 1, there is a sludge scraping plate 15 fixedly installed. The sludge scraping plate 15 is in contact with the inner bottom wall of the pool body 1. Through such a setting, it is possible to use one motor 12 to achieve stirring and sludge scraping, thereby reducing the cost of the device.

[0028] The bottom end of the draft tube 3 is in a convex shape. At the bottom end of the draft tube 3, there is a reduction gearbox 16 fixedly installed. The central shaft 13 is fixedly connected to the input end of the reduction gearbox 16. The output end of the reduction gearbox 16 is connected to and penetrates a rotating shaft 17. The sludge scraping plate 15 is fixedly installed on the outer surface of the rotating shaft 17. Since the speeds required for stirring and sludge scraping are different, by setting the reduction gearbox 16, the two can operate at appropriate speeds.

[0029] One end of the water inlet pipe 8 located inside the draft tube 3 is inclined. Through the inclined setting, the sewage forms a turbulent flow when it impacts the draft tube 3. The flocculant dosing pipe 10 is parallel to the water inlet pipe 8 and is located on the other side of the inclination.

[0030] The pool body 1 is divided into upper and lower parts above the filter layer 11. The two parts are connected by a flange 18. Inside the pool body 1, a support ring 19 is fixedly installed below the filter layer 11. Through such a setting, it is more convenient to replace the filter layer 11.

[0031] The number of the sludge scraping plates 15 is multiple. The multiple sludge scraping plates 15 are distributed in a circular array. Inside the sludge scraping plate 15, there is a connecting ring 20 fixedly installed. The connecting ring 20 is fixedly installed on the outer surface of the rotating shaft 17. The top end of the sludge scraping plate 15 is fixedly connected to the rotating shaft 17 through a towing rope 21. Through such a setting, the sludge scraping plate 15 can be fixedly connected.

[0032] During use, the in-line mixer 9 mixes the coagulant into the sewage and injects it into the inside of the draft tube 3 through the water inlet pipe 8. At the same time, the flocculant is put into the sewage through the flocculant dosing pipe 10. Under the stirring of the stirring blades 14, it is fully mixed to produce precipitation at the bottom end of the pool body 1 and is discharged through the periodically opened sludge discharge pipe 5. The precipitated water is filtered through the filter layer 11, and the liquid level is higher than the overflow weir 6 and is discharged from the overflow weir 6 to the outlet pipe 7. Thus, it is possible to make the flocculation precipitation and the filtration of sewage occur in a three-dimensional space, thereby reducing the land occupation of the device.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0034] The above are only the preferred specific embodiments 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 of the present utility model and its inventive concept, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. An integrated sedimentation tank, comprising a tank body (1), characterized in that: The top of the pool body (1) is provided with a cover plate (2), the middle of the cover plate (2) is provided with a guide tube (3), the guide tube (3) is located inside the pool body (1), and the bottom of the guide tube (3) is provided with a notch (4) connected to the pool body (1); The inner bottom wall of the tank body (1) is connected to and penetrated by a mud discharge pipe (5); an overflow weir (6) is fixedly installed on the inner edge of the tank body (1); the overflow weir (6) is connected to and penetrated by a water outlet pipe (7); an inlet pipe (8) is inserted into the guide tube (3) below the overflow weir (6); the inlet pipe (8) extends to the outside of the tank body (1); one end of the inlet pipe (8) located outside the tank body (1) is connected to and penetrated by a pipeline mixer (9); a flocculant delivery pipe (10) is connected to and penetrated by a side of the inlet pipe (8) inside the guide tube (3); and a filter layer (11) is arranged between the tank body (1) and the guide tube (3).

2. An integrated sedimentation tank according to claim 1, characterized in that: The filter layer (11) comprises a support frame (111), a through hole (112) is provided on the surface of the support frame (111) in an inclined manner downward, and a filter material (113) is fixedly installed inside the through hole (112).

3. An integrated sedimentation tank according to claim 1, characterized in that: A motor (12) is arranged at the top end of the cover plate (2), a central shaft (13) is fixedly mounted on the output end of the motor (12), a stirring blade (14) is fixedly mounted on the outer surface of the central shaft (13) located inside the guide tube (3), the stirring blade (14) is located below the water inlet pipe (8), a scraper (15) is fixedly mounted on the outer surface of the central shaft (13) located inside the pool body (1), and the scraper (15) is in contact with the inner bottom wall of the pool body (1).

4. An integrated sedimentation tank according to claim 3, characterized in that: The bottom end of the guide tube (3) is located in a boss shape, a reduction box (16) is fixedly installed on the bottom end of the guide tube (3), the central shaft (13) is fixedly connected to the input end of the reduction box (16), the output end of the reduction box (16) is connected to and penetrates a rotating shaft (17), and the scraper blade (15) is fixedly installed on the outer surface of the rotating shaft (17).

5. The integrated sedimentation tank according to claim 1, characterized in that: The water inlet pipe (8) is arranged at one end inside the guide tube (3) and is inclined, and the flocculant delivery pipe (10) is parallel to the water inlet pipe (8) and is located at the other side of the inclination.

6. The integrated sedimentation tank according to claim 1, characterized in that: The pool body (1) is located above the filter layer (11) and is divided into an upper and lower part, the two parts are connected by a flange (18), and a support ring (19) is fixedly installed inside the pool body (1) below the filter layer (11).

7. An integrated sedimentation tank according to claim 3, characterized in that: The scraper blades (15) are multiple in number and are distributed in a ring array. A connecting ring (20) is fixedly mounted on the inner side of the scraper blade (15). The connecting ring (20) is fixedly mounted on the outer surface of the rotating shaft (17). The top end of the scraper blade (15) is fixedly connected to the rotating shaft (17) via a traction rope (21).

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