Anaerobic tower with internal sludge circulation

Abstract

This utility model relates to the field of wastewater treatment technology, specifically disclosing an anaerobic tower with sludge internal circulation. It includes an anaerobic tower body, an inlet component comprising a bottom cylinder 2.1 fixed to the bottom of the anaerobic tower body, an inlet pipe tangentially connected to the side wall of the bottom cylinder and penetrating the side wall of the anaerobic tower body, and an impeller assembly rotatably installed in the inner cavity of the bottom cylinder; a water distribution plate comprising a disc-shaped shell rotatably fitted into the inner cavity of the anaerobic tower body near the bottom, and a connecting cylinder fixedly fitted into the middle of the bottom surface of the disc-shaped shell, with several outlet holes on the top surface of the disc-shaped shell; the water distribution component comprising an insertion pipe fixedly fitted to the outlet holes at its bottom end, and a cylinder located outside the insertion pipe at the bottom of the inner cavity; the bottom end of the connecting cylinder rotatably fitted into the top end of the bottom cylinder, and the bottom end of the connecting cylinder fixedly connected to the impeller assembly; this design effectively solves the problems of sludge settling and calcification at the bottom and the difficulty in fully and uniformly mixing sludge and wastewater during wastewater treatment in anaerobic towers.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an anaerobic tower for sludge internal circulation. Background Technology

[0002] Anaerobic biological treatment technology is a highly efficient wastewater treatment method in which anaerobic bacteria decompose, metabolize, and digest organic matter in wastewater under anaerobic conditions, significantly reducing the organic matter content of the wastewater and producing biogas. As an important form of biological treatment, anaerobic treatment is seeing a continuous development of new anaerobic treatment processes and structures, gradually overcoming the shortcomings of traditional anaerobic processes and achieving significant progress in both theory and practice.

[0003] Currently, in the process of treating wastewater using anaerobic digesters, wastewater first enters the bottom of the digester and mixes with sludge. Most of the COD in the wastewater is degraded into biogas, which is collected by a primary three-phase separator and rises. As the gas is lifted, it carries some water and sludge upwards, passing through a riser pipe to a gas-liquid separator at the top of the reactor. Here, biogas is separated from the water and sludge and enters a biogas collection pipe. The water and sludge then slide down through a downcomer to the bottom of the digester, forming an internal circulation flow. However, anaerobic sludge is prone to settling and calcifying at the bottom of the anaerobic digester, requiring replacement with new anaerobic sludge. Furthermore, using only a conventional distributor to mix wastewater with the sludge makes it difficult to achieve a thorough and uniform mixing of wastewater and sludge. Utility Model Content

[0004] The purpose of this invention is to provide an anaerobic tower for sludge internal circulation, which solves the problems of sludge settling and calcification at the bottom and the difficulty in fully and uniformly mixing sludge and sewage when using current sludge internal circulation anaerobic towers for sewage treatment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anaerobic tower for sludge internal circulation, comprising an anaerobic tower body, an inlet component comprising a bottom cylinder 2.1 fixed to the bottom of the anaerobic tower body cavity, an inlet pipe tangentially connected to the side wall of the bottom cylinder and penetrating the side wall of the anaerobic tower body, and an impeller assembly rotatably installed in the inner cavity of the bottom cylinder; a water distribution plate comprising a disc-shaped shell rotatably sleeved in the inner cavity of the anaerobic tower body near the bottom, and a connecting cylinder fixedly sleeved in the middle of the bottom surface of the disc-shaped shell, the top surface of the disc-shaped shell being provided with a plurality of water outlet holes; the water distribution component comprising an insertion pipe fixedly sleeved at the bottom end to the water outlet holes, and a cylinder body located at the bottom of the inner cavity outside the insertion pipe; the bottom end of the connecting cylinder is rotatably sleeved in the top end of the bottom cylinder, and the bottom end of the connecting cylinder is fixedly connected to the impeller assembly.

[0006] Preferably, the impeller assembly includes a central shaft with its bottom end rotatably sleeved at the center of the bottom surface of the bottom cylinder and blades uniformly fixed to the outer peripheral wall of the central shaft along the circumference, and the bottom end of the connecting cylinder is fixedly connected to the top end of the central shaft.

[0007] Preferably, a ring body is provided around the top of the central shaft, and a plurality of support strips are fixedly connected between the inner peripheral wall of the ring body and the top of the outer peripheral wall of the central shaft. An annular groove matching the rotatable sleeve of the ring body is fixed at the top of the bottom cylinder, and a connecting ring fixedly connected to the ring body is fixed at the outer edge of the bottom end of the connecting cylinder.

[0008] Preferably, the top surface of the ring body is provided with a plurality of threaded holes evenly distributed along the circumference, and the connecting ring is provided with through holes corresponding to the threaded holes one by one.

[0009] Preferably, a plurality of support bars extending radially are fixed between the top and bottom surfaces of the inner cavity of the disc-shaped housing.

[0010] Preferably, a slewing bearing is sleeved on the outer edge of the disc-shaped shell, and the outer ring of the slewing bearing is fixedly sleeved on the inner cavity of the anaerobic tower near the bottom end.

[0011] Preferably, a plurality of connecting strips are fixedly connected between the top end of the outer peripheral wall of the insertion tube and the bottom end of the inner peripheral wall of the cylinder, the top end of the insertion tube is connected to a cylindrical shell, and an annular sealing plate is fixedly sleeved on the insertion tube at a position corresponding to the top surface of the disc-shaped shell.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model relates to an anaerobic tower for sludge internal circulation. When sewage enters the inlet, the impeller assembly rotates, causing the disc-shaped shell to rotate. The water distribution component, which rotates with the disc-shaped shell, ejects water, achieving not only uniform water distribution but also providing a stirring effect to ensure thorough and uniform mixing of sewage and sludge. In addition, the upward ejection of sewage through the pipe in the water distribution component carries surrounding sludge from the bottom of the cylinder. The process of sludge entering from the bottom and exiting from the top of the cylinder achieves tumbling of the sludge, preventing it from settling and calcifying at the bottom. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0015] Figure 2 This is an exploded structural diagram of the water inlet component of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the water distribution plate of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the water distribution component of this utility model.

[0018] In the diagram: 1 - Anaerobic tower body;

[0019] 2-Inlet component; 2.1-Bottom cylinder; 2.2-Inlet pipe; 2.3-Annular groove; 2.4-Impeller assembly; 2.4.1-Central shaft; 2.4.2-Blade; 2.4.3-Ring body; 2.4.3.1-Threaded hole; 2.4.4-Support strip;

[0020] 3-Water distribution plate; 3.1-Slewing bearing; 3.2-Disc-shaped housing; 3.2.1-Water outlet; 3.2.2-Support bar; 3.3-Connecting cylinder; 3.4-Connecting ring;

[0021] 4-Water distribution component; 4.1-Insertion pipe; 4.2-Conical shell; 4.3-Cylinder body; 4.4-Connecting strip; 4.5-Annular sealing plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: an anaerobic tower for sludge internal circulation, wherein the water inlet 2 includes a bottom cylinder 2.1 fixed to the bottom of the inner cavity of the anaerobic tower body 1, a water inlet pipe 2.2 tangentially connected to the side wall of the bottom cylinder 2.1 and penetrating the side wall of the anaerobic tower body 1, and an impeller assembly 2.4 rotatably installed in the inner cavity of the bottom cylinder 2.1. The bottom cylinder 2.1 has an annular groove 2.3 fixed at its top. The impeller assembly 2.4 includes a central shaft 2.4.1 rotatably fitted at its bottom end to the center of the bottom surface of the bottom cylinder 2.1, and blades 2.4.2 uniformly fixed circumferentially to the outer wall of the central shaft 2.4.1. The outer periphery of the top end of the central shaft 2.4.1 is provided with a ring body 2.4.3 that rotatably fits the annular groove 2.3. Multiple support strips 2.4.4 are fixedly connected between the inner wall of the ring body 2.4.3 and the top end of the outer wall of the central shaft 2.4.1. Multiple threaded holes 2.4.3.1 are uniformly provided circumferentially on the top surface of the ring body 2.4.3. The inner edge of the blades 2.4.2 is set at a certain angle with the corresponding generatrix of the central shaft 2.4.1. That is, the sewage pumped in tangentially from the inlet pipe 2.2 impacts the blades 2.4.2, so that when the impeller assembly 2.4 rotates as a whole, the blades 2.4.2 can provide an upward lift for the sewage.

[0024] The water distribution plate 3 includes a disc-shaped shell 3.2 rotatably fitted into the inner cavity of the anaerobic tower body 1 near the bottom, and a connecting cylinder 3.3 fixedly fitted into the middle of the bottom surface of the disc-shaped shell 3.2. The top surface of the disc-shaped shell 3.2 is provided with several water outlet holes 3.2.1. A connecting ring 3.4, which is fixedly connected to the ring body 2.4.3, is fixedly attached to the outer edge of the bottom end of the connecting cylinder 3.3. The connecting ring 3.4 is provided with through holes corresponding to the threaded holes 2.4.3.1. That is, by passing a bolt through the through hole and threading it into the corresponding threaded hole 2.4.3.1, the connecting ring 3.4 and the ring body 2.4.3 can be fixedly connected. A slewing bearing 3.1 is fitted onto the outer edge of the disc-shaped shell 3.2. The outer ring of the slewing bearing 3.1 is fixedly fitted into the inner cavity of the anaerobic tower body 1 near the bottom. That is, when the impeller assembly 2.4 rotates, it can drive the disc-shaped shell 3.2 to rotate within the slewing bearing 3.1 through the connecting cylinder 3.3.

[0025] The water distribution component 4 includes an insert 4.1 whose bottom end is fixedly sleeved to the water outlet 3.2.1 and a cylinder 4.3 whose inner cavity bottom is located outside the insert 4.1; wherein, multiple connecting strips 4.4 are fixedly connected between the top end of the outer peripheral wall of the insert 4.1 and the bottom end of the inner peripheral wall of the cylinder 4.3, the top end of the insert 4.1 is connected to a cylindrical shell 4.2, and an annular sealing plate 4.5 is fixedly sleeved on the insert 4.1 at a position corresponding to the top surface of the disc-shaped shell 3.2.

[0026] In summary, during use, sewage is pumped into the inlet pipe 2.2 by the booster pump. The high-pressure sewage pumped into the inlet pipe 2.2 enters the inner cavity of the bottom cylinder 2.1 tangentially, thereby pushing the blades 2.4.2, causing the impeller assembly 2.4 to rotate as a whole within the bottom cylinder 2.1.

[0027] The impeller assembly 2.4 drives the disc-shaped housing 3.2 to rotate through the connecting cylinder 3.3, enabling the water distribution component 4 to provide a stirring and mixing effect on the sludge and sewage. Since the blades 2.4.2 also provide an upward lift force to the sewage, the sewage is propelled into the disc-shaped housing 3.2 through the connecting cylinder 3.3. Finally, the sewage is sprayed upward through the insertion pipe 4.1 and the conical housing 4.2, which helps to improve the uniformity of water distribution and thus facilitates the full and uniform mixing of sludge and sewage.

[0028] In addition, the process of sewage being sprayed upward from the insertion pipe 4.1 through the conical shell 4.2 creates a negative pressure at the bottom of the inner cavity of the cylinder 4.3, which facilitates the sludge around the water distribution component 4 to be sucked in from the bottom of the inner cavity of the cylinder 4.3 and then discharged from the top of the cylinder 4.3, thereby achieving sludge turbulence and preventing sludge from settling and calcifying.

[0029] To improve the rigidity of the top surface of the disc-shaped housing 3.2 and prevent it from deforming under pressure, multiple support bars 3.2.2 extending radially are fixed between the top and bottom surfaces of the inner cavity of the disc-shaped housing 3.2.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anaerobic tower for sludge internal circulation, comprising an anaerobic tower body (1), characterized in that, Also includes: The water inlet component (2) includes a bottom cylinder 2.1 fixed to the bottom of the inner cavity of the anaerobic tower body (1), a water inlet pipe (2.2) tangentially connected to the side wall of the bottom cylinder (2.1) and penetrating the side wall of the anaerobic tower body (1), and an impeller assembly (2.4) rotatably installed in the inner cavity of the bottom cylinder (2.1); The water distribution plate (3) includes a disc-shaped shell (3.2) that is rotatably sleeved in the inner cavity of the anaerobic tower body (1) near the bottom and a connecting cylinder (3.3) that is fixedly sleeved in the middle of the bottom surface of the disc-shaped shell (3.2). The top surface of the disc-shaped shell (3.2) is provided with several water outlet holes (3.2.1). The water distribution component (4) includes a tube (4.1) whose bottom end is fixedly sleeved to the water outlet (3.2.1) and a cylinder (4.3) whose inner cavity bottom is located outside the tube (4.1); The bottom end of the connecting cylinder (3.3) is rotatably sleeved on the top end of the bottom cylinder (2.1), and the bottom end of the connecting cylinder (3.3) is fixedly connected to the impeller assembly (2.4).

2. The anaerobic tower for sludge internal circulation according to claim 1, characterized in that: The impeller assembly (2.4) includes a central shaft (2.4.1) rotatably sleeved at the bottom of the bottom cylinder (2.1) and blades (2.4.2) uniformly fixed to the outer peripheral wall of the central shaft (2.4.1) along the circumference. The bottom end of the connecting cylinder (3.3) is fixedly connected to the top end of the central shaft (2.4.1).

3. The anaerobic tower for sludge internal circulation according to claim 2, characterized in that: The outer periphery of the top end of the central shaft (2.4.1) is provided with an annular body (2.4.3). Multiple support strips (2.4.4) are fixedly connected between the inner peripheral wall of the annular body (2.4.3) and the top end of the outer peripheral wall of the central shaft (2.4.1). The top end of the bottom cylinder (2.1) is fixed with an annular groove (2.3) that is rotatably fitted and matched with the annular body (2.4.3). The outer edge of the bottom end of the connecting cylinder (3.3) is fixed with a connecting ring (3.4) that is fixedly connected to the annular body (2.4.3).

4. The anaerobic tower for sludge internal circulation according to claim 3, characterized in that: The top surface of the ring (2.4.3) is uniformly provided with a plurality of threaded holes (2.4.3.1) along the circumference, and the connecting ring (3.4) is provided with through holes that correspond one-to-one with the threaded holes (2.4.3.1).

5. The anaerobic tower for sludge internal circulation according to claim 1, characterized in that: Multiple support bars (3.2.2) extending radially are fixed between the top and bottom surfaces of the inner cavity of the disc-shaped shell (3.2).

6. The anaerobic tower for sludge internal circulation according to claim 1, characterized in that: The outer edge of the disc-shaped shell (3.2) is fitted with a slewing bearing (3.1), and the outer ring of the slewing bearing (3.1) is fixedly fitted to the inner cavity of the anaerobic tower body (1) near the bottom.

7. The anaerobic tower for sludge internal circulation according to claim 1, characterized in that: Multiple connecting strips (4.4) are fixedly connected between the top end of the outer peripheral wall of the insertion tube (4.1) and the bottom end of the inner peripheral wall of the cylinder (4.3). The top end of the insertion tube (4.1) is connected to a cylindrical shell (4.2). An annular sealing plate (4.5) is fixedly sleeved on the insertion tube (4.1) at the position corresponding to the top surface of the disc-shaped shell (3.2).

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