Sewage treatment system

Abstract

The utility model discloses a sewage treatment system. The sewage treatment system comprises an aeration tank, a stirring device and an air inlet device, the stirring device comprises a stirring shaft, a driving assembly and an aeration pipe, the stirring shaft is rotatably installed in the aeration tank along the axis in the vertical direction, the stirring shaft is provided with an air channel with an opening in the lower end, and the circumference of the stirring shaft is further provided with connecting holes communicated with the air channel; a driving part of the driving assembly is connected with the upper end of the stirring shaft; the aeration pipe is connected with the connecting hole, and air outlet holes are formed in the peripheral side of the aeration pipe; the air inlet device is connected with the air channel and used for conveying air to the air channel. According to the aeration device, the aeration pipe can be used for stirring while conveying air, so that the turbulence speed of liquid in the aeration tank is increased, and the aeration efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment system. Background Art

[0002] In sewage treatment systems, aeration tanks are usually used. Aeration tanks are structures that use the activated sludge method to treat sewage. The tank provides the amount of oxygen required by aerobic microorganisms and the mixing conditions for full contact between sewage and activated sludge. Aeration is a means of bringing air and water into strong contact. Its purpose is to dissolve oxygen in the air into water and promote the exchange of substances between gas and liquid.

[0003] Patent CN115650457A discloses an aeration tank, comprising a tank body, a working bridge, an air supply main pipe, an aeration unit and a lifting mechanism. The working bridge is spanned above the opening of the tank body, and lifting mechanisms are provided at both ends of the working bridge. A plurality of aeration units are evenly distributed under the working bridge, and the plurality of aeration units are connected to the air supply main pipe. The aeration unit comprises a connecting pipe, an air distribution pipe and an aeration pipe. One end of the connecting pipe is connected to the air supply main pipe, and an air distribution pipe perpendicular to the connecting pipe is provided at the other end of the connecting pipe. Aeration pipes are symmetrically provided at both ends of the air distribution pipe. The aeration unit comprises a connecting pipe, an air distribution pipe and an aeration pipe. One end of the connecting pipe is connected to the air supply main pipe, and an air distribution pipe perpendicular to the connecting pipe is provided at the other end of the connecting pipe. Aeration pipes are symmetrically provided at both ends of the air distribution pipe.

[0004] However, the aeration means of the aeration tank in the above-mentioned prior art is single and the aeration efficiency is low. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies, propose a sewage treatment system, and solve the technical problems of single aeration means and low aeration efficiency of aeration tanks in the prior art.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a sewage treatment system, comprising:

[0008] Aeration tanks;

[0009] A stirring device, comprising a stirring shaft, a driving assembly and an aeration pipe, wherein the stirring shaft is rotatably installed in the aeration tank along an axis in a vertical direction, the stirring shaft is provided with an air passage with an opening at the lower end, and a connecting hole communicating with the air passage is also provided on the circumference of the stirring shaft, the driving part of the driving assembly is connected to the upper end of the stirring shaft; the aeration pipe is connected to the connecting hole, and an air outlet is provided on the circumference of the aeration pipe; and

[0010] An air intake device is connected to the airway, and is used to transport gas to the airway.

[0011] In some embodiments, the air outlet is arranged upward.

[0012] In some embodiments, a plurality of the air outlet holes are provided, and the plurality of the air outlet holes are spaced apart along the axial direction of the aeration tube.

[0013] In some embodiments, the air intake device includes a connecting pipe, an air intake pipe, and an air pump. The connecting pipe is arranged horizontally at the bottom of the aeration tank, and the air intake pipe is extended in the vertical direction. The lower end of the air intake pipe is connected to the connecting pipe, and the upper end of the air intake pipe is inserted into the air duct from the lower end of the stirring shaft. The outer periphery of the air intake pipe is rotatably and sealingly connected to the side wall of the air duct, and the air pump is connected to one end of the connecting pipe.

[0014] In some embodiments, the stirring device also includes a sleeve, which is adapted to the aeration pipe and slidably installed on the outer periphery of the aeration pipe. The sleeve is provided with a through hole so as to be movable to a conducting position in which the through hole is correspondingly connected to the air outlet and to a closed position in which the through hole is staggered from the air outlet.

[0015] In some embodiments, an annular mounting groove is provided on the outer periphery of the aeration pipe, one end of the sleeve is slidably mounted in the mounting groove, and the sleeve is sealed and matched with the mounting groove, and an air hole connected to the air passage is also provided on the inner side wall of the mounting groove, so that when the air intake device introduces air into the air passage, the air enters the mounting groove from the air hole to drive the sleeve to slide to the conducting position;

[0016] The stirring device further comprises an elastic member, two ends of which are respectively connected to the other end of the sleeve and the aeration pipe, and the elastic member is used to drive the sleeve to slide to the closed position.

[0017] In some embodiments, a plurality of aeration tubes are provided, and the plurality of aeration tubes are arranged at intervals along the circumference of the stirring shaft. The plurality of aeration tubes constitute an aeration tube group, and a plurality of aeration tube groups are provided, and the plurality of aeration tube groups are arranged at intervals along the axial direction of the stirring shaft.

[0018] In some embodiments, the stirring device further comprises a plurality of stirring blades, each of the stirring blades is mounted on the stirring shaft, and the plurality of stirring blades are spaced apart along the circumference of the stirring shaft.

[0019] In some embodiments, a plurality of the stirring blades constitute a stirring group, and a plurality of the stirring groups are provided, and the plurality of the stirring groups and the plurality of the aeration tube groups are arranged alternately.

[0020] In some embodiments, the aeration pipe is detachably connected to the stirring shaft.

[0021] Compared with the prior art, the sewage treatment system provided by the utility model is characterized in that the stirring shaft is rotatably installed in the aeration tank along an axis in a vertical direction, the stirring shaft is provided with an air passage with an opening at the lower end, and a connecting hole communicating with the air passage is further provided on the circumference of the stirring shaft, and the driving part of the driving assembly is connected to the upper end of the stirring shaft; the aeration pipe is connected to the connecting hole, and an air outlet is provided on the circumference of the aeration pipe; the air intake device is connected to the air passage, and the air intake device, the air passage and the aeration pipe are connected in sequence, and the air introduced by the air intake device passes through the air passage and the aeration pipe in sequence, and is finally discharged from the air outlet. When used specifically, the air intake device is first started, and air is continuously introduced into the aeration tank through the aeration pipe, and then the driving assembly is started, and the driving assembly drives the stirring shaft to rotate, and the stirring shaft drives the aeration pipe to rotate, so that the aeration pipe can stir while conveying air, thereby increasing the turbulent velocity of the liquid in the aeration tank and improving the aeration efficiency.

[0022] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the preferred embodiment of the utility model is described in detail as follows with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a sewage treatment system provided by the utility model;

[0024] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the stirring device;

[0025] Figure 3 yes Figure 2 A cross-sectional view of the stirring device;

[0026] Figure 4 yes Figure 3 A partial cross-sectional view of the stirring device;

[0027] Figure 5 yes Figure 1 Cross-sectional view of the aeration tube.

[0028] Description of reference numerals:

[0029] 1- Aeration tank;

[0030] 2-stirring device, 21-stirring shaft, 211-air channel, 212-connecting hole, 22-driving assembly, 23-aeration pipe, 231-air outlet, 232-mounting groove, 233-air hole, 24-sleeve, 241-through hole, 25-elastic member, 26-stirring blade;

[0031] 3-air intake device, 31-connecting pipe, 32-intake pipe. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] In order to solve the technical problems of single aeration means and low aeration efficiency in the aeration tank in the prior art, the utility model provides a sewage treatment system, which can increase the turbulent flow velocity of the liquid in the aeration tank and improve the aeration efficiency.

[0034] See also Figure 1 , Figure 1 It is a structural schematic diagram of a sewage treatment system in one embodiment of the utility model.

[0035] The utility model provides a sewage treatment system, comprising an aeration tank 1, a stirring device 2 and an air intake device 3; the stirring device 2 comprises a stirring shaft 21, a driving assembly 22 and an aeration pipe 23, the stirring shaft 21 is rotatably installed in the aeration tank 1 along an axis in a vertical direction, the stirring shaft 21 is provided with an airway 211 with an opening at the lower end, the circumference of the stirring shaft 21 is also provided with a connecting hole 212 communicating with the airway 211, the driving part of the driving assembly 22 is connected to the upper end of the stirring shaft; the aeration pipe 23 is connected to the connecting hole 212, and the circumferential side of the aeration pipe 23 is provided with an air outlet 231; the air intake device 3 is connected to the airway 211, and the air intake device 3 is used to transport gas to the airway 211.

[0036] In this embodiment, the stirring shaft 21 is rotatably installed in the aeration tank 1 along the axis in the vertical direction, and the stirring shaft 21 is provided with an air duct 211 with an opening at the lower end, and the circumference of the stirring shaft 21 is also provided with a connecting hole 212 connected to the air duct 211, and the driving part of the driving assembly 22 is connected to the upper end of the stirring shaft; the aeration pipe 23 is connected to the connecting hole 212, and the circumferential side of the aeration pipe 23 is provided with an air outlet 231; the air intake device 3 is connected to the air duct 211, and the air intake device 3, the air duct 211 and the aeration pipe 23 are connected in sequence. The air introduced by the air intake device 3 passes through the air duct 211 and the aeration pipe 23 in sequence, and is finally discharged from the air outlet 231. When in use, the air intake device 3 is first started, and air is continuously introduced into the aeration tank 1 through the aeration pipe 23. Then, the driving component 22 is started, and the driving component 22 drives the stirring shaft 21 to rotate, and the stirring shaft 21 drives the aeration pipe 23 to rotate, so that the aeration pipe 23 can stir while conveying air, thereby increasing the turbulent velocity of the liquid in the aeration tank 1 and improving the aeration efficiency.

[0037] In this embodiment, the air channel 211 is extended along the circumferential direction of the stirring shaft 21 , the air channel 211 is cylindrical in shape, and the air channel 211 is coaxially arranged with the stirring shaft 21 .

[0038] In this embodiment, the driving assembly 22 includes a driving motor, which is installed above the aeration tank 1, and the main shaft of the driving motor extends downward. The main shaft is connected to the upper end of the stirring shaft 21 through a coupling, so that the stirring shaft 21 can be driven to rotate by the driving motor.

[0039] In this embodiment, one end of the aeration tube 23 is connected to the connecting hole 212, so that the cavity of the aeration tube 23 can be connected to the airway 211, and the other end of the aeration tube 23 is blocked, so that air can only be discharged from the air outlet 231. For ease of explanation, the following embodiments all assume that the first end of the aeration tube 23 is connected to the connecting hole 212, and the second end of the aeration tube 23 is blocked.

[0040] In one embodiment, the air outlet 231 is disposed upward.

[0041] In this embodiment, since the aeration pipe 23 is generally arranged at the bottom of the aeration tank 1, in order to allow air to fully contact with sewage, the air outlet 231 is arranged upward.

[0042] In one embodiment, a plurality of the air outlet holes 231 are provided, and the plurality of the air outlet holes 231 are arranged at intervals along the axial direction of the aeration tube 23 .

[0043] In this embodiment, in order to improve the aeration efficiency, a plurality of the air outlet holes 231 are provided. By providing a plurality of air outlet holes 231, the air outlet efficiency is improved, thereby improving the aeration efficiency.

[0044] In one embodiment, the air intake device 3 includes a connecting pipe 31, an air intake pipe 32, and an air pump. The connecting pipe 31 is arranged at the bottom of the aeration tank 1 in a horizontal direction, and the air intake pipe 32 is extended in a vertical direction. The lower end of the air intake pipe 32 is connected to the connecting pipe 31, and the upper end of the air intake pipe 32 is inserted into the air duct 211 from the lower end of the stirring shaft 21. The outer periphery of the air intake pipe 32 is rotatably and sealedly connected to the side wall of the air duct 211, and the air pump is connected to one end of the connecting pipe 31.

[0045] In this embodiment, the connecting pipe 31 is extended in the horizontal direction, and one end of the connecting pipe 31 extends into the aeration tank 1 and is fixedly connected to the bottom of the aeration tank 1. The other end of the connecting pipe 31 is connected to the air pump, and the air inlet pipe 32 is vertically arranged. The air inlet pipe 32 is connected to the connecting pipe 31 through a pipe connector, and the upper end of the air inlet pipe 32 is located in the airway 211. The air inlet pipe 32 and the stirring shaft 21 are coaxially arranged. A sealing member is arranged between the circumference of the air inlet pipe 32 and the side wall of the airway 211, so that the air inlet pipe 32 and the air pump are connected. The air intake pipe 32 is sealed and connected to the air passage 211. Since the stirring shaft 21 can rotate but the air intake pipe 32 does not need to rotate, a bearing is also installed on the outer periphery of the air intake pipe 32. The outer ring of the bearing is installed in the air passage 211, so that the air intake pipe 32 is rotatably connected to the air passage 211. With this arrangement, air can be transported to the air passage 211 through the air intake pipe 32 without affecting the rotation of the stirring shaft 21. Moreover, the air intake pipe 32 is fixedly connected to the connecting pipe 31. Therefore, the air intake pipe 32 can also serve to assist in fixing the stirring shaft 21 to prevent the stirring shaft 21 from swinging.

[0046] In one embodiment, the stirring device 2 also includes a sleeve 24, which is adapted to the aeration tube 23. The sleeve 24 is slidably installed on the outer periphery of the aeration tube 23. The sleeve 24 is provided with a through hole 241, so as to have a conducting position in which the through hole 241 is correspondingly connected to the air outlet 231 and a closed position in which the through hole 241 is staggered from the air outlet 231.

[0047] In the present embodiment, during the operation of the aeration tank 1, it is not necessary to introduce ventilation into the aeration tank 1 for a long time. After the air inlet device 3 stops working, sewage will enter the air outlet 231. Since the sewage contains impurities, the impurities gather at the air outlet 231, which can easily cause blockage. Therefore, in order to avoid the impurities from clogging the air outlet 231, a sleeve 24 is slidably sleeved on the outer periphery of the aeration pipe 23, that is, the sleeve 24 is slidably arranged along the circumferential direction of the aeration pipe 23, and the inner diameter of the sleeve 24 is adapted to the outer diameter of the aeration pipe 23 to ensure that there is no gap between the sleeve 24 and the aeration pipe 23, and the through hole 241 is arranged upward, and the diameter of the through hole 241 is larger than that of the aeration pipe 23. The diameter of the air outlet hole 231 is such that when air needs to be introduced into the aeration tank 1, the sleeve 24 slides until the through hole 241 corresponds to the air outlet hole 231. At this time, the sleeve 24 will not hinder the flow of gas, and air can be smoothly introduced into the aeration tank 1. When air does not need to be introduced into the aeration tank 1, the sleeve 24 slides until the through hole 241 is staggered from the air outlet hole 231. At this time, the air outlet hole 231 corresponds to the side wall of the sleeve 24, and the through hole 241 corresponds to the side wall of the aeration pipe 23. The air outlet hole 231 and the through hole 241 are not connected. In this way, the air outlet hole 231 can be closed to prevent impurities from gathering at the air inlet 233.

[0048] In one of the embodiments, an annular mounting groove 232 is provided on the outer periphery of the aeration tube 23, one end of the sleeve 24 is slidably mounted in the mounting groove 232, and the sleeve 24 is sealed and matched with the mounting groove 232, and the inner side wall of the mounting groove 232 is also provided with an air hole 233 connected to the air channel 211, so that when the air intake device 3 introduces air into the air channel 211, the air enters the mounting groove 232 from the air hole 233 to drive the sleeve 24 to slide to the conduction position; the stirring device 2 also includes an elastic member 25, both ends of the elastic member 25 are respectively connected to the other end of the sleeve 24 and the aeration tube 23, and the elastic member 25 is used to drive the sleeve 24 to slide to the closed position.

[0049] In this embodiment, a mounting groove 232 is provided at a position of the aeration pipe 23 close to the first end. The mounting groove 232 is annularly arranged, and one end of the mounting groove 232 facing the second end is open. The size of the mounting groove 232 is adapted to the sleeve 24, that is, the outer diameter of the mounting groove 232 is the same as the outer diameter of the sleeve 24, and the inner diameter of the mounting groove 232 is the same as the inner diameter of the sleeve 24. The sleeve 24 can fit with the mounting groove 232, so that the sleeve 24 and the mounting groove 232 are sealed, and a connecting hole is provided between the mounting groove 232 and the aeration pipe 23. The air hole 233 of the channel 211 is arranged in this way. When the air intake device 3 is working, air can enter the installation groove 232 from the air hole 233, thereby pushing the sleeve 24 to move toward the second end direction, so that the through hole 241 is connected with the air outlet hole 231. When the air intake device 3 stops working, the sleeve 24 can move toward the first end direction under the drive of the elastic member 25, so that the through hole 241 is staggered with the air outlet hole 231. With this arrangement, the structure is simple, and there is no need to additionally set up a complex driving device to drive the sleeve 24 to move, thereby reducing the cost.

[0050] In this embodiment, the elastic member 25 is a spring, and a mounting protrusion is provided on the circumference of the second end of the aeration tube 23. The spring is sleeved on the outer circumference of the aeration tube 23, and one end of the spring abuts against the mounting protrusion, and the other end of the spring abuts against one end of the sleeve 24, so that the sleeve 24 is driven by the spring to move toward the first end.

[0051] In one embodiment, a plurality of aeration tubes 23 are provided, and the plurality of aeration tubes 23 are arranged at intervals along the circumference of the stirring shaft 21 . The plurality of aeration tubes 23 constitute an aeration tube 23 group, and the plurality of aeration tube 23 groups are provided, and the plurality of aeration tube 23 groups are arranged at intervals along the axial direction of the stirring shaft 21 .

[0052] In this embodiment, by providing a plurality of aeration pipes 23, not only the efficiency of gas transportation is improved, but also the stirring effect is improved, thereby improving the aeration efficiency.

[0053] In one embodiment, the stirring device 2 further includes a plurality of stirring blades 26 , each of the stirring blades 26 is mounted on the stirring shaft 21 , and the plurality of stirring blades 26 are spaced apart along the circumference of the stirring shaft 21 .

[0054] In this embodiment, a stirring blade 26 is further provided on the outer periphery of the stirring shaft 21 , and the aeration efficiency is improved by the coordinated use of the stirring blade 26 and the aeration pipe 23 .

[0055] In one embodiment, a plurality of the stirring blades 26 constitute a stirring group, and a plurality of the stirring groups are provided, and the plurality of the stirring groups and the plurality of the aeration tubes 23 are arranged alternately.

[0056] In one embodiment, the aeration pipe 23 is detachably connected to the stirring shaft 21 .

[0057] In this embodiment, the connection hole 212 is a threaded hole, one end of the aeration pipe 23 is provided with an external thread, and the aeration pipe 23 is threadedly connected to the stirring shaft 21 , which is convenient for installation.

[0058] In order to better understand the present invention, the following Figures 1 to 5 The technical solution of the utility model is described in detail:

[0059] During specific use, the air pump is first started, and the air pump conveys air upward through the connecting pipe 31 and the air inlet pipe 32. When the air enters the aeration pipe 23, it enters the mounting groove 232 through the air hole 233, thereby pushing the sleeve 24 to move through the gas pressure, so that the through hole 241 is connected with the air outlet hole 231, and air is continuously introduced into the aeration tank 1 through the aeration pipe 23. Then, the driving component 22 is started, and the driving component 22 drives the stirring shaft 21 to rotate, and the stirring shaft 21 drives the aeration pipe 23 to rotate, so that the aeration pipe 23 can stir while conveying air, thereby increasing the turbulent velocity of the liquid in the aeration tank 1 and improving the aeration efficiency.

[0060] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A sewage treatment system, characterized in that: It includes: Aeration tanks; A stirring device, comprising a stirring shaft, a driving assembly and an aeration pipe, wherein the stirring shaft is rotatably installed in the aeration tank along an axis in a vertical direction, the stirring shaft is provided with an air passage with an opening at the lower end, and a connecting hole communicating with the air passage is also provided on the circumference of the stirring shaft, the driving part of the driving assembly is connected to the upper end of the stirring shaft; the aeration pipe is connected to the connecting hole, and an air outlet is provided on the circumference of the aeration pipe; and An air intake device is connected to the airway, and is used to transport gas to the airway.

2. The sewage treatment system according to claim 1, characterized in that: The air outlet is arranged upward.

3. The sewage treatment system according to claim 2, characterized in that: There are a plurality of air outlet holes, and the plurality of air outlet holes are arranged at intervals along the axial direction of the aeration pipe.

4. The sewage treatment system according to claim 1, characterized in that: The air intake device includes a connecting pipe, an air intake pipe, and an air pump. The connecting pipe is arranged at the bottom of the aeration tank in a horizontal direction, and the air intake pipe is extended in a vertical direction. The lower end of the air intake pipe is connected to the connecting pipe, and the upper end of the air intake pipe is inserted into the airway from the lower end of the stirring shaft. The outer periphery of the air intake pipe is rotatably and sealingly connected to the side wall of the airway, and the air pump is connected to one end of the connecting pipe.

5. The sewage treatment system according to claim 1, characterized in that: The stirring device also includes a sleeve, which is adapted to the aeration pipe and slidably installed on the outer periphery of the aeration pipe. The sleeve is provided with a through hole so as to be movable to a conducting position in which the through hole is correspondingly connected to the air outlet and to a closed position in which the through hole is staggered from the air outlet.

6. The sewage treatment system according to claim 5, characterized in that: An annular mounting groove is provided on the outer periphery of the aeration pipe, one end of the sleeve is slidably mounted in the mounting groove, and the sleeve is sealed and matched with the mounting groove, and an air hole connected to the air passage is also provided on the inner side wall of the mounting groove, so that when the air intake device introduces air into the air passage, the air enters the mounting groove from the air hole to drive the sleeve to slide to the conducting position; The stirring device further comprises an elastic member, two ends of which are respectively connected to the other end of the sleeve and the aeration pipe, and the elastic member is used to drive the sleeve to slide to the closed position.

7. The sewage treatment system according to claim 1, characterized in that: There are a plurality of aeration tubes, which are arranged at intervals along the circumference of the stirring shaft. The aeration tubes constitute an aeration tube group, and there are a plurality of aeration tube groups, which are arranged at intervals along the axial direction of the stirring shaft.

8. The sewage treatment system according to claim 7, characterized in that: The stirring device further comprises a plurality of stirring blades, each of the stirring blades is mounted on the stirring shaft, and the plurality of stirring blades are arranged at intervals along the circumference of the stirring shaft.

9. The sewage treatment system according to claim 8, characterized in that: The plurality of stirring blades constitute a stirring group, and the stirring group is provided in plurality, and the plurality of stirring groups and the plurality of aeration pipe groups are arranged alternately.

10. The sewage treatment system according to claim 1, characterized in that: The aeration pipe is detachably connected to the stirring shaft.

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