Mixing device for an anaerobic reactor

Abstract

The utility model discloses a mixed device for anaerobic reactor belongs to sewage treatment equipment technical field, mixed device for anaerobic reactor, including cylinder, the upper and lower part of cylinder is installed with three -phase separator and water inlet distributor respectively, and the inside of cylinder is installed with conical fairing and ring fairing from inside to outside respectively, the central position of conical fairing is installed with central flow guide pipe, the below intermediate position of water inlet distributor is installed with water inlet pipe, be provided with the inside circulation area between conical fairing and central flow guide pipe, and be provided with the outside circulation area between conical fairing and ring fairing, through setting up the flow guide hole one on conical fairing and the flow guide hole two on ring fairing with 30 degree-60 degree's inclination angle and enter outside circulation area, produce strong shearing force and cyclone effect, drive the liquid of outside area to move downward and reenter bottom mixing area, to realize the efficient, uniform mixing of liquid in whole reactor.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment technology, and more specifically, to a mixing device for anaerobic reactors. Background Technology

[0002] Anaerobic reactors are the core equipment for treating high-concentration organic wastewater, and their operating efficiency is highly dependent on the mixing state within the reactor. Good mixing promotes full contact between wastewater and anaerobic sludge, uniformly distributes the substrate, and prevents sludge bed compaction and short-circuiting of the water flow.

[0003] Based on the above, the inventors have discovered that current mixing methods in anaerobic reactors mainly include water pump reflux mixing, biogas boosting mixing, and mechanical mixing. These methods generally suffer from the following problems: they require additional reflux pumps, resulting in high energy consumption and increased operating costs; they rely entirely on biogas production; insufficient biogas production during reactor start-up or low-load operation leads to poor mixing; they require motors and agitators, resulting in complex structures that are prone to corrosion and damage, difficult maintenance, and potential damage to sludge particles. Therefore, in view of these issues, the inventors have researched and improved existing structures to provide a mixing device for anaerobic reactors, aiming to achieve a more practical and valuable solution. Utility Model Content

[0004] Technical problem to be solved: In view of the problems existing in the prior art, the purpose of this utility model is to provide a mixing device for anaerobic reactors, which can utilize the natural lift of biogas to achieve efficient and non-powered self-mixing, ensure uniform liquid flow in the reactor, prevent sludge deposition, and improve treatment efficiency.

[0005] Technical solution: To solve the above problems, the present invention adopts the following technical solution.

[0006] A mixing device for an anaerobic reactor includes a cylindrical body. A three-phase separator and an inlet distributor are installed at the upper and lower parts of the cylindrical body, respectively. A conical guide hood and an annular guide hood are installed inside the cylindrical body from the inside out. A central guide pipe is installed at the center of the conical guide hood. An inlet pipe is installed at the lower center of the inlet distributor. An inner circulation zone is provided between the conical guide hood and the central guide pipe, and an outer circulation zone is provided between the conical guide hood and the annular guide hood. A guide hole one and a guide hole two are respectively opened on the inner side of the conical guide hood and the annular guide hood.

[0007] Furthermore, a reinforcing sleeve is fitted on the outside of the water inlet distributor, and a support leg is fixedly connected to the bottom of the reinforcing sleeve. A controller is installed on one side of the support leg.

[0008] Furthermore, the annular guide shroud is coaxially sleeved on the outside of the central guide tube, and both the upper and lower ends of the annular guide shroud are sealed to the inner wall of the cylinder.

[0009] Furthermore, the axes of the first and second guide holes are at an angle of 30°-60° to the horizontal plane, and the inclination directions of the first and second guide holes are consistent, forming a swirling flow guide.

[0010] Furthermore, the two ends of the central guide pipe are connected to the three-phase separator and the water inlet distributor, respectively.

[0011] Furthermore, the water inlet distributor is a multi-tube radial water distributor, with anti-clogging caps at the ends of each water distribution tube.

[0012] Furthermore, both the conical and annular flow deflectors are made of stainless steel, and a circular cover is installed on the side of the cylinder.

[0013] Beneficial effects: Compared with the prior art, the advantages of this utility model are: In this design, by setting up a conical and annular guide hood with inclined guide holes one and two, wastewater enters the bottom of the reactor through the inlet pipe and the inlet distributor. In the inner circulation zone, the biogas produced by the anaerobic reaction adheres to the sludge flocs, forming a low-density gas-liquid-solid three-phase mixture, which rises rapidly in the central guide pipe, forming a strong internal circulation flow. This upward flow impacts the three-phase separator and then flows downward. Simultaneously, the high-speed upward flow is injected into the outer circulation zone at an inclined angle of 30°-60° through guide hole one on the conical guide hood and guide hole two on the annular guide hood, generating strong shear force and swirling effect, driving the liquid in the outer zone downward and re-entering the bottom mixing zone, thereby achieving efficient and uniform mixing of the liquid throughout the reactor. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a schematic diagram of the planar aspect of this utility model; Figure 3 This is a schematic diagram of the bottom of the device of this utility model; Figure 4 This is a schematic diagram of the internal structure of the device of this utility model; Figure 5 This is a top view of the interior of the device of this utility model.

[0015] Explanation of the labels in the diagram: 1. Cylinder; 2. Three-phase separator; 3. Reinforcing sleeve; 4. Support leg; 5. Controller; 6. Water inlet distributor; 7. Water inlet pipe; 8. Central guide pipe; 9. Conical guide shroud; 10. Annular guide shroud; 11. Inner circulation zone; 12. Outer circulation zone; 13. Circular cover; 14. Guide hole one; 15. Guide hole two. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example

[0017] Please see Figure 1-5 The mixing device for the anaerobic reactor includes a cylindrical body 1. A three-phase separator 2 and an inlet distributor 6 are installed at the upper and lower parts of the cylindrical body 1, respectively. A conical guide hood 9 and an annular guide hood 10 are installed inside the cylindrical body 1 from the inside to the outside. A central guide pipe 8 is installed at the center of the conical guide hood 9. An inlet pipe 7 is installed at the lower middle position of the inlet distributor 6. An inner circulation zone 11 is set between the conical guide hood 9 and the central guide pipe 8, and an outer circulation zone 12 is set between the conical guide hood 9 and the annular guide hood 10. A guide hole 14 and a guide hole 2 15 are respectively opened on the inner side of the conical guide hood 9 and the annular guide hood 10.

[0018] See Figure 1 and Figure 2 A reinforcing sleeve 3 is fitted on the outside of the water inlet distributor 6. A support leg 4 is fixedly connected to the bottom of the reinforcing sleeve 3. A controller 5 is installed on one side of the support leg 4. The controller 5 is used to control the operation of the device.

[0019] See Figure 4 and Figure 5 The annular guide shroud 10 is coaxially sleeved on the outside of the central guide tube 8, and both the upper and lower ends of the annular guide shroud 10 are sealed to the inner wall of the cylinder 1.

[0020] See Figure 4 and Figure 5 The axes of guide hole 14 and guide hole 2 15 are at an angle of 30°-60° to the horizontal plane, and the tilting directions of guide hole 14 and guide hole 2 15 are consistent, forming a swirling guide, generating strong shear force and swirling effect, driving the liquid in the outer zone to move downward and re-enter the bottom mixing zone, thereby achieving efficient and uniform mixing of the liquid in the entire reactor.

[0021] See Figure 1 and Figure 5 The two ends of the central guide pipe 8 are connected to the three-phase separator 2 and the water inlet distributor 6, respectively.

[0022] See Figure 1 and Figure 3The water inlet distributor 6 is a multi-pipe radial water distributor, with anti-clogging caps at the ends of each water distribution pipe. The water inlet distributor 6 enhances the structural strength and stability of the water distribution system. In conjunction with the anti-clogging caps, it effectively prevents clogging, ensures uniform water distribution, and extends the service life of the equipment.

[0023] See Figure 4 and Figure 5 Both the conical deflector 9 and the annular deflector 10 are made of stainless steel. A circular cover 13 is installed on the side of the cylinder 1. The circular cover 13 is used for inspection and cleaning of the internal components.

[0024] In operation: The wastewater to be treated enters the reactor through the inlet pipe 7 and is evenly sprayed to the bottom of the reactor by the multi-tube radial water distributor 6. The wastewater first enters the inner circulation zone 11 enclosed by the central guide pipe 8 and the conical guide hood 9. In the inner circulation zone 11, the wastewater comes into full contact with the high concentration of anaerobic sludge. Microorganisms degrade organic matter, producing a large number of tiny biogas bubbles. These bubbles adhere to the sludge flocs, significantly reducing the density of the mixture. Under the action of buoyancy, the three-phase mixture of sludge, water, and gas forms a high-speed upward flow in the central guide pipe 8, constituting a strong internal circulation. This process is similar to the working principle of an "airlift reactor," but without the need for external air supply. When the high-speed upward flow reaches the top, it is blocked by the three-phase separator 2 and deflected downward. At the same time, part of the upward flow, under pressure, is ejected outward at an angle of 30°-60° from the guide hole 14 on the conical guide hood 9 and the guide hole 15 on the annular guide hood 10. Because all the guide holes are tilted in the same direction, the jet generates a strong tangential shear force in the outer circulation zone 12, driving the liquid in the outer zone to form a swirling flow. The liquid in the outer circulation zone is then recirculated and mixed with the overall mixture. The swirling flow formed in the outer circulation zone 12 drives the liquid downwards, eventually re-entering the inner circulation zone 11 from the bottom of the reactor, completing one cycle. The tilted design of the guide holes not only generates swirling flow but also enhances the penetration of the jet, effectively breaking up any density stratification that may form and preventing sludge deposition and short-circuiting at the bottom.

[0025] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A mixing device for an anaerobic reactor, comprising a cylindrical body (1), wherein a three-phase separator (2) and an inlet distributor (6) are respectively installed in the upper and lower parts of the cylindrical body (1), and a conical guide hood (9) and an annular guide hood (10) are respectively installed inside the cylindrical body (1) from the inside out, characterized in that: A central guide pipe (8) is installed at the center of the conical guide shroud (9), and an inlet pipe (7) is installed at the lower middle position of the water inlet distributor (6). An inner circulation zone (11) is provided between the conical guide shroud (9) and the central guide pipe (8), and an outer circulation zone (12) is provided between the conical guide shroud (9) and the annular guide shroud (10). A guide hole one (14) and a guide hole two (15) are respectively opened on the inner side of the conical guide shroud (9) and the annular guide shroud (10).

2. The mixing device for an anaerobic reactor according to claim 1, characterized in that: The water inlet distributor (6) is fitted with a reinforcing sleeve (3) on its outer side. A support leg (4) is fixedly connected to the bottom of the reinforcing sleeve (3). A controller (5) is installed on one side of the support leg (4).

3. The mixing device for an anaerobic reactor according to claim 1, characterized in that: The annular guide shroud (10) is coaxially sleeved on the outside of the central guide tube (8), and both the upper and lower ends of the annular guide shroud (10) are sealed to the inner wall of the cylinder (1).

4. The mixing device for an anaerobic reactor according to claim 1, characterized in that: The axes of the first guide hole (14) and the second guide hole (15) are at an angle of 30°-60° to the horizontal plane, and the inclination directions of the first guide hole (14) and the second guide hole (15) are consistent, forming a swirling guide.

5. The mixing device for an anaerobic reactor according to claim 1, characterized in that: The two ends of the central guide pipe (8) are connected to the three-phase separator (2) and the water inlet distributor (6), respectively.

6. The mixing device for an anaerobic reactor according to claim 1, characterized in that: The water inlet distributor (6) is a multi-pipe radial water distributor, and each water distribution pipe is equipped with an anti-clogging umbrella cap at the end.

7. The mixing device for an anaerobic reactor according to claim 1, characterized in that: Both the conical shroud (9) and the annular shroud (10) are made of stainless steel, and a circular cover (13) is installed on the side of the cylinder (1).

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