Stirring device for anaerobic reactor

Abstract

The utility model relates to the technical field of stirrer sealing, in particular to a stirring device for an anaerobic reactor, which is characterized in that a sealing component is arranged at the joint of a stirring shaft and the anaerobic reactor, is fixedly connected with the anaerobic reactor and is provided with a first outlet and a second outlet which are communicated with the inside of the anaerobic reactor; the stirring shaft sequentially penetrates through the first outlet, the second outlet and the outer wall of the anaerobic reactor and then extends into the anaerobic reactor, a mechanical seal is arranged at the first outlet and enables the first outlet to be in a sealed state, and a maintenance plugging shaft sleeve is fixedly arranged on the stirring shaft between the second outlet and the outer wall of the anaerobic reactor and is in a sealed state. The maintenance plugging shaft sleeve is detachably connected with the second outlet and used for plugging the second outlet. The mechanical seal can be quickly replaced under the condition that the anaerobic reactor is provided with materials, the whole structure is simple and compact, and the maintenance cost is low.

Description

Technical Field

[0001] This utility model relates to the field of agitator sealing technology, specifically to an agitator device for an anaerobic reactor. Background Technology

[0002] An anaerobic reactor is a biological treatment device that treats wastewater and sludge under anaerobic conditions through the action of anaerobic microorganisms. Stirring the materials inside the tank is essential for the process operation; that is, mixing the anaerobic materials within the system through a specific stirring method. Currently, the agitators used in anaerobic reactors have mechanical seals located inside the reactor. If the mechanical seal fails, the anaerobic reactor must be completely cleaned before the failed mechanical seal can be replaced.

[0003] Therefore, there is an urgent need for a new type of agitator that allows for the replacement of mechanical seals while the material is being transported. Summary of the Invention

[0004] This invention addresses the problem of replacing the mechanical seal after emptying the agitator in existing anaerobic reactors. It provides an agitator for anaerobic reactors that allows for quick replacement of the mechanical seal even when the anaerobic reactor is carrying material. The overall structure is simple and compact, and the maintenance cost is low.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A stirring device for an anaerobic reactor includes a power unit that drives a stirring shaft to rotate. The stirring shaft drives stirring blades to agitate within the anaerobic reactor. A sealing assembly is installed at the connection between the stirring shaft and the anaerobic reactor. The sealing assembly is fixedly connected to the anaerobic reactor. The sealing assembly has a first outlet and a second outlet communicating with the interior of the anaerobic reactor. The stirring shaft passes sequentially through the first outlet, the second outlet, and the outer wall of the anaerobic reactor before extending into the interior of the anaerobic reactor. A mechanical seal is installed at the first outlet to seal it. A maintenance sealing sleeve is fixedly installed on the stirring shaft between the second outlet and the outer wall of the anaerobic reactor. The maintenance sealing sleeve is detachably connected to the second outlet and is used to seal the second outlet. The mechanical seal serves as a shaft sealing device during normal operation of the device, while the maintenance sealing sleeve is used for shaft sealing during maintenance.

[0007] Furthermore, the other end of the stirring shaft is connected to a power unit via a speed reducer, and a frame is provided between the speed reducer and the sealing assembly. The frame is detachably connected to the sealing assembly. The frame is used to fix the speed reducer and the sealing assembly.

[0008] Furthermore, one end of the mechanical seal is connected to a sealing assembly, and the other end is placed inside a frame, which is provided with a maintenance hole. The frame is used to protect the mechanical seal.

[0009] Furthermore, the sealing assembly includes a receiving base plate with a first outlet, a parallel sealing plate fixedly disposed on the inner side of the receiving base plate, and a second outlet on the sealing plate. The sealing assembly is used for sealing the connection between the stirring shaft and the anaerobic reactor.

[0010] Furthermore, the maintenance sealing sleeve is threadedly connected to the second outlet. The outer circumference of the end of the maintenance sealing sleeve facing the second outlet has an external thread, and the inner wall of the second outlet has a matching internal thread. Screwing the maintenance sealing sleeve into the second outlet isolates the material within the anaerobic reactor.

[0011] Furthermore, the maintenance sealing sleeve is rotatably connected to the outer wall of the anaerobic reactor. The outer periphery of the end of the maintenance sealing sleeve facing the anaerobic reactor is smooth and cylindrical, and the maintenance sealing sleeve has a shoulder. This is used to define the position of the maintenance sealing sleeve.

[0012] The beneficial effects of this utility model through the above technical solution are as follows:

[0013] This invention features a sealing assembly at the connection between the stirring shaft and the anaerobic reactor. The sealing assembly has a first outlet and a second outlet that communicate with the interior of the anaerobic reactor. A mechanical seal is installed at the first outlet to provide axial sealing during normal operation. A maintenance plugging sleeve is installed at the second outlet to seal the second outlet, enabling quick replacement of the mechanical seal when the anaerobic reactor is carrying material. The overall structure is simple and compact, with low maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the sealing assembly of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the repair and sealing bushing of this utility model;

[0017] The following numbers are used in the attached diagram: 11 is the stirring shaft, 12 is the stirring blade, 2 is the anaerobic reactor, 3 is the sealing assembly, 31 is the first outlet, 32 is the second outlet, 33 is the receiving base plate, 34 is the sealing plate, 4 is the mechanical seal, 5 is the maintenance and sealing bushing, 51 is the external thread, 52 is the shaft shoulder, 6 is the reducer, and 7 is the frame. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] like Figures 1-3As shown, this embodiment provides a stirring device for an anaerobic reactor, including a power unit, a reducer 6, a frame 7, a sealing assembly 3, a stirring shaft 11, and stirring blades 12.

[0020] The power unit drives the stirring shaft 11 to rotate, and the stirring shaft 11 drives the stirring blades 12 to stir inside the anaerobic reactor 2. The power unit can be an electric motor. The sealing component 3 is used to seal the connection between the stirring shaft 11 and the anaerobic reactor 2. The stirring shaft 11, stirring blades 12 and anaerobic reactor 2 are conventionally arranged. In this embodiment, not all of the anaerobic reactor 2 is shown. The figure shows the outer wall of the anaerobic reactor 2.

[0021] like Figure 2 As shown, a sealing assembly 3 is provided at the connection between the stirring shaft 11 and the anaerobic reactor 2. The sealing assembly 3 is fixedly connected to the anaerobic reactor 2. The sealing assembly 3 is provided with a first outlet 31 and a second outlet 32 ​​that communicate with the interior of the anaerobic reactor 2. The stirring shaft 11 passes through the first outlet 31, the second outlet 32 ​​and the outer wall of the anaerobic reactor 2 in sequence and then extends into the interior of the anaerobic reactor 2. A mechanical seal 4 is provided at the first outlet 31 to seal the first outlet 31. A maintenance and sealing bushing 5 is fixedly provided on the stirring shaft 11 between the second outlet 32 ​​and the outer wall of the anaerobic reactor 2. The maintenance and sealing bushing 5 is detachably connected to the second outlet 32 ​​and is used to seal the second outlet 32.

[0022] When the stirring device is in daily use, the mechanical seal 4 acts as a shaft seal to prevent liquid in the anaerobic reactor 2 from leaking out from the first outlet 31. At this time, the maintenance sealing sleeve 5 is located on the outer wall of the anaerobic reactor 2 and is rotatably connected to the outer wall of the anaerobic reactor 2. It rotates relative to the anaerobic reactor 2 together with the stirring shaft 11 to realize the stirring function. When it is necessary to repair or replace the mechanical seal 4, the stirring shaft 11 is pulled outward to move the maintenance sealing sleeve 5 to the second outlet 32 ​​with the stirring shaft 11. The maintenance sealing sleeve 5 is fixed to the second outlet 32 ​​to achieve a seal at the second outlet 32, so that the liquid in the anaerobic reactor 2 cannot leak out from the second outlet 32. At this time, the mechanical seal 4 can be disassembled normally, realizing the replacement of the mechanical seal while the material is on, which greatly saves maintenance time.

[0023] Specifically, the sealing assembly 3 includes a receiving base plate 33, a sealing plate 34, a mechanical seal 4, and a maintenance and sealing bushing 5. The receiving base plate 33 is fixedly connected to the outer wall of the anaerobic reactor 2 via a connecting plate. A first outlet 31 is provided on the receiving base plate 33, and a parallel sealing plate 34 is fixedly arranged on the inner side of the receiving base plate 33. A second outlet 32 ​​is provided on the sealing plate 34. In this embodiment, the specific shapes of the receiving base plate 33 and the sealing plate 34 are not limited, as long as they meet the sealing effect required by this utility model. The mechanical seal 4 is a shaft sealing device for rotating fluid machinery. Since the improvement of this utility model is not in the mechanical seal 4, and the mechanical seal is a known technology in the field, the specific structure of the mechanical seal 4 will not be described in detail here.

[0024] In one possible implementation, the maintenance and sealing bushing 5 is threadedly connected to the second outlet 32. When the stirring shaft 11 is pulled to move the maintenance and sealing bushing 5 to the second outlet 32, the stirring shaft 11 is rotated in the opposite direction to screw one end of the maintenance and sealing bushing 5 into the second outlet 32, thereby sealing the second outlet 32 ​​and preventing the liquid in the anaerobic reactor 2 from leaking.

[0025] Specifically, such as Figures 2-3 As shown, the maintenance and sealing sleeve 5 is fitted onto the stirring shaft 11, and the maintenance and sealing sleeve 5 is connected to the stirring shaft 11 by bolts. The outer circumference of the end of the maintenance and sealing sleeve 5 facing the second outlet 32 ​​is provided with an external thread 51, which matches the internal thread on the inner wall of the second outlet 32. The outer circumference of the end of the maintenance and sealing sleeve 5 facing the anaerobic reactor 2 is a smooth cylindrical shape. The maintenance and sealing sleeve 5 is rotatably connected to the outer wall of the anaerobic reactor 2. The maintenance and sealing sleeve 5 has a shoulder 52, which is located in the middle of the maintenance and sealing sleeve 5 and is used to define the position of the maintenance and sealing sleeve 5 relative to the anaerobic reactor 2 or the second outlet 32.

[0026] In one possible implementation, the other end of the stirring shaft 11 is connected to a power unit via a reducer 6, and the power unit drives the stirring shaft 11 to rotate. A frame 7 is provided between the reducer 6 and the sealing assembly 3. The frame 7 is used to fix the sealing assembly 3 and the reducer 6, and the mechanical seal 4 is installed inside the frame 7.

[0027] The frame 7 is detachably connected to the sealing assembly 3. One end of the mechanical seal 4 is connected to the sealing assembly 3, and the other end is placed inside the frame 7. The frame 7 is provided with a maintenance hole.

[0028] When mechanical seal 4 needs to be removed, first loosen the connecting bolts between frame 7 and reducer 6, and remove reducer 6; remove the connecting bolts between frame 7 and base plate 33, loosen the lock nut on mechanical seal 4, pull frame 7 and stirring shaft 11 outward to separate frame 7 from base plate 33, rotate stirring shaft 11 in the opposite direction to make maintenance sealing sleeve 5 and the second outlet 32 ​​on sealing plate 34 fully engage, thus sealing and isolating the material in anaerobic reactor 2. Remove frame 7, loosen the connecting bolts between mechanical seal 4 and base plate 33, and remove mechanical seal 4 from stirring shaft 11 to perform maintenance on mechanical seal 4.

[0029] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A stirring device for an anaerobic reactor, comprising a power unit that drives a stirring shaft (11) to rotate, the stirring shaft (11) driving stirring blades (12) to stir within the anaerobic reactor (2), characterized in that, A sealing assembly (3) is provided at the connection between the stirring shaft (11) and the anaerobic reactor (2). The sealing assembly (3) is fixedly connected to the anaerobic reactor (2). The sealing assembly (3) is provided with a first outlet (31) and a second outlet (32) that communicate with the interior of the anaerobic reactor (2). The stirring shaft (11) passes through the first outlet (31), the second outlet (32) and the outer wall of the anaerobic reactor (2) in sequence and then extends into the interior of the anaerobic reactor (2). A mechanical seal (4) is provided at the first outlet (31). The mechanical seal (4) makes the first outlet (31) sealed. A maintenance and sealing bushing (5) is fixedly provided on the stirring shaft (11) between the second outlet (32) and the outer wall of the anaerobic reactor (2). The maintenance and sealing bushing (5) is detachably connected to the second outlet (32) and is used to seal the second outlet (32).

2. The stirring device for an anaerobic reactor according to claim 1, characterized in that, The other end of the stirring shaft (11) is connected to the power unit via a reducer (6). A frame (7) is provided between the reducer (6) and the sealing assembly (3). The frame (7) and the sealing assembly (3) are detachably connected.

3. The stirring device for an anaerobic reactor according to claim 2, characterized in that, The mechanical seal (4) is connected to the sealing assembly (3) at one end and placed inside the frame (7) at the other end. The frame (7) is provided with a maintenance hole.

4. The stirring device for an anaerobic reactor according to claim 1, characterized in that, The sealing assembly (3) includes a receiving base plate (33), a first outlet (31) is provided on the receiving base plate (33), a parallel sealing plate (34) is fixedly provided on the inner side of the receiving base plate (33), and a second outlet (32) is provided on the sealing plate (34).

5. The stirring device for an anaerobic reactor according to claim 1, characterized in that, The maintenance sealing bushing (5) is threadedly connected to the second outlet (32). The outer periphery of the end of the maintenance sealing bushing (5) facing the second outlet (32) is provided with an external thread (51), and the inner wall of the second outlet (32) is provided with a matching internal thread.

6. The stirring device for an anaerobic reactor according to claim 1, characterized in that, The maintenance and sealing bushing (5) is rotatably connected to the outer wall of the anaerobic reactor (2). The outer periphery of the end of the maintenance and sealing bushing (5) facing the anaerobic reactor (2) is smooth and cylindrical. The maintenance and sealing bushing (5) has a shoulder (52).

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