Air floatation flocculation stirring device

Abstract

The invention relates to the technical field of water treatment equipment, and provides an air flotation flocculation stirring device which comprises a supporting plate, a stirring shaft capable of rotating along the axis of the supporting plate is arranged on the supporting plate, the outer wall of the stirring shaft is sleeved with a rotating connector capable of rotating relative to the stirring shaft, and the rotating connector is connected with an external air pump through an air inlet pipe on one side. An air guide cavity penetrating through the bottom wall of the stirring shaft is formed in the stirring shaft in the axial direction of the stirring shaft, and a plurality of air guide holes communicating with the air guide cavity are formed in the outer wall of the stirring shaft in the circumferential direction. According to the invention, the defects in the prior art are overcome, the design is reasonable, the structure is compact, the gas guide cavity and the gas guide hole are arranged in the stirring shaft, and the gas runners which are communicated with each other are arranged in the stirring aeration unit, so that gas entering from the gas inlet pipe is released through the aeration micropores after passing through the gas runners; and when the stirring shaft rotates to drive the stirring aeration component to rotate, flocculation stirring and aeration are synchronously carried out, so that the treatment efficiency is improved, site construction is reduced, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of water treatment equipment technology, specifically to an air flotation flocculation stirring device. Background Technology

[0002] Air flotation is a highly efficient technology for treating suspended solids, colloids, oils and other pollutants in water. It is widely used in water supply, urban sewage and industrial wastewater treatment. Its core principle is to introduce a large number of microbubbles into the water, so that they adhere to the "flocs" formed by flocculation in the water, forming an "air-floc" composite with an overall density less than that of water. It then floats to the surface quickly by buoyancy, thus achieving solid-liquid separation.

[0003] Traditional dissolved air flotation (DAF) processes typically consist of three independent units: a flocculation reaction unit, a dissolved air release unit, and a flotation separation unit. The flocculation reaction unit usually employs mechanical or hydraulic agitation to allow the coagulant to fully react with impurities in the water to form flocs. Subsequently, the water containing the flocs enters the DAF tank and comes into contact with microbubbles from the dissolved air release pipe. However, this traditional process requires the separate construction of flocculation and DAF tanks, resulting in large equipment, extensive land use, and high infrastructure costs. Therefore, we propose a DAF flocculation agitation device. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an air flotation flocculation mixing device that overcomes these limitations. It features a reasonable design, compact structure, and solves the problems of existing water treatment processes requiring separate construction of flocculation tanks and air flotation tanks, resulting in bulky equipment, large land area requirements, and high infrastructure costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an air flotation flocculation stirring device, comprising a support plate, wherein the support plate is provided with a stirring shaft that can rotate along its axis, the outer wall of the stirring shaft is fitted with a rotary joint that can rotate relative to it, the rotary joint is connected to an external air pump through an air inlet pipe on one side, the interior of the stirring shaft is provided with an air guide cavity that penetrates its bottom wall along its axial direction, and the outer wall of the stirring shaft is provided with a plurality of air guide holes that communicate with the air guide cavity, and the plurality of air guide holes are all located inside the rotary joint and communicate with its inner cavity;

[0006] The bottom of the stirring shaft is connected to a stirring and aeration unit. The stirring and aeration unit includes a connecting shaft connected to the bottom of the stirring shaft. The outer wall of the connecting shaft is provided with multiple stirring and aeration components. Each stirring and aeration component includes a pair of air guide rods arranged vertically. A stirring plate is provided between the two air guide rods. The surface of the stirring plate is evenly provided with a number of aeration micropores. The connecting shaft, air guide rods and stirring plate are all provided with interconnected gas flow channels, so that the gas entering from the air inlet pipe is released through the gas flow channels and then through the aeration micropores.

[0007] Preferably, multiple stirring plates are provided at equal intervals between the two air guide rods, and there are gaps between adjacent stirring plates.

[0008] Preferably, the outer wall of the connecting shaft is fitted with a cleaning unit, the cleaning unit including a collar fitted on the outer wall of the connecting shaft and movable along its axial direction, the outer wall of the collar being provided with a pair of blades, the paired blades being disposed on both sides of the stirring plate.

[0009] Preferably, it also includes a lifting unit, which includes a lifting ring sleeved on the outer wall of the stirring shaft and movable along its axial direction. The outer wall of the lifting ring is circumferentially connected with a plurality of connecting plates, and the side of the connecting plate away from the lifting ring is connected to the sleeve.

[0010] The outer wall of the lifting ring is fitted with a lifting sleeve. A lead screw is threadedly connected to one side of the lifting sleeve, and a guide rod is inserted into the other side. Both the lead screw and the guide rod are vertically arranged.

[0011] Preferably, the connecting plate is detachably connected to the lifting ring and the collar. The outer wall of the collar is provided with connecting ears in the circumferential direction. Each connecting ear is provided with a pair of first connecting holes. The bottom of the lifting ring is provided with a lower ring. The lower ring is provided with a plurality of pairs of second connecting holes in the circumferential direction. The upper and lower ends of the connecting plate are provided with connecting protrusions facing one side. The connecting protrusions are symmetrically provided with third connecting holes that mate with the first and second connecting holes, so as to facilitate connection by bolts and nuts.

[0012] Preferably, the top of the lifting ring is provided with an upper ring, which is rotatably connected inside the lifting sleeve.

[0013] Preferably, the outer wall of the stirring shaft is provided with a shaft protrusion along its axial direction, and the interior of the lifting ring is provided with a shaft groove that matches the shaft protrusion along its axial direction.

[0014] Preferably, the bottom of the stirring shaft and the upper and lower sides of the connecting shaft are provided with connecting flanges, the top connecting flange of the connecting shaft is provided with a first sealing ring, and the bottom connecting flanges of the stirring shaft and the connecting shaft are provided with annular sealing grooves that cooperate with the first sealing ring.

[0015] Preferably, the bottom wall of the connecting shaft is provided with a base, the bottom of the base is a flange that matches the bottom flange of the connecting shaft, and the top is a second sealing ring that matches the sealing groove.

[0016] Preferably, multiple agitation and aeration units are sequentially arranged at the bottom of the agitator shaft to extend the agitation depth.

[0017] This invention provides an air flotation flocculation stirring device. It has the following beneficial effects:

[0018] 1. By setting air guide chambers and air guide holes inside the stirring shaft, and setting interconnected gas flow channels inside the stirring aeration unit, the gas entering from the air inlet pipe is released through the aeration micropores after passing through the gas flow channels. When the stirring shaft rotates and drives the stirring aeration components to rotate, flocculation stirring and aeration are carried out simultaneously, which improves treatment efficiency, reduces site construction, and lowers costs.

[0019] 2. Multiple stirring plates are equidistantly arranged between the two air guide rods, and there are gaps between adjacent stirring plates to facilitate fluid passage. While ensuring the stirring range, the fluid resistance is relatively reduced, thereby effectively reducing the energy consumption of the equipment.

[0020] 3. A cleaning unit is installed, which drives the collar to move axially along the connecting shaft through the lifting unit, so that the blade scrapes away impurities on the surface of the mixing plate, ensuring the normal operation and service life of the mixing plate.

[0021] 4. Multiple mixing and aeration units can be sequentially installed at the bottom of the mixing shaft to adapt to treatment tanks or other equipment of different depths, thus improving the applicability of the equipment. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Structural sectional plan view;

[0024] Figure 3 This is a three-dimensional schematic diagram of the stirring and aeration component structure of the present invention;

[0025] Figure 4 This is a three-dimensional schematic diagram of the impurity removal unit structure of the present invention;

[0026] Figure 5 This is a three-dimensional schematic diagram of the connecting plate structure of the present invention;

[0027] Figure 6 This is a three-dimensional schematic diagram of the lifting ring structure of the present invention;

[0028] Figure 7 This is a three-dimensional schematic diagram of the base structure of the present invention;

[0029] Figure 8 A three-dimensional schematic diagram of the structure of multiple stirring and aeration units in this invention;

[0030] Figure 9 For the present invention Figure 8 Schematic diagram of structural cross-section.

[0031] In the diagram: 1. Support plate; 2. Stirring shaft; 21. Air guide chamber; 22. Air guide hole; 24. Shaft protrusion; 3. Rotary joint; 31. Air inlet pipe; 41. Connecting shaft; 411. First sealing ring; 412. Sealing groove; 42. Stirring and aeration component; 421. Air guide rod; 422. Stirring plate; 423. Aeration micropores; 51. Collar; 52. Blade plate; 53. Connecting ear; 54. First connecting hole; 61. Lifting ring; 611. Lower ring; 612. Second connecting hole; 613. Upper ring; 62. Connecting plate; 621. Connecting protrusion; 622. Third connecting hole; 71. Lifting sleeve; 72. Lead screw; 73. Guide rod; 8. Base; 81. Second sealing ring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] See attached document Figure 1-7 An air flotation flocculation stirring device includes a support plate 1, which is fixedly installed on the foundation of a treatment tank or other equipment. The support plate 1 is provided with a stirring shaft 2 that can rotate along its axis. The stirring shaft 2 is driven to rotate by a motor. A rotary joint 3 is sleeved on the outer wall of the stirring shaft 2. A wear-resistant sealing ring is provided at the contact point between the two to prevent a large amount of gas leakage. The rotary joint 3 can rotate relative to the stirring shaft 2, so as to remain stationary or move relative to the stirring shaft 2 when it rotates. The rotary joint 3 is connected to an external air pump through an air inlet pipe 31 on one side for introducing gas.

[0034] The stirring shaft 2 has an air guide cavity 21 that penetrates its bottom wall along its axial direction for conveying gas. The outer wall of the stirring shaft 2 has several air guide holes 22 that communicate with the air guide cavity 21. These air guide holes 22 are all located inside the rotary joint 3 and communicate with its inner cavity. In this way, when the stirring shaft 2 rotates, the gas entering from the air inlet pipe 31 can still enter the air guide cavity 21 through the inner cavity of the rotary joint 3 and the air guide holes 22.

[0035] A mixing and aeration unit is connected to the bottom of the mixing shaft 2. The mixing and aeration unit includes a connecting shaft 41 connected to the bottom of the mixing shaft 2. Multiple mixing and aeration components 42 are arranged circumferentially on the outer wall of the connecting shaft 41. Each mixing and aeration component 42 includes a pair of air guide rods 421 arranged vertically. A mixing plate 422 is provided between the two air guide rods 421. A number of aeration microholes 423 are evenly opened on the surface of the mixing plate 422. Gas channels are provided in the connecting shaft 41, the air guide rods 421 and the mixing plate 422, so that the gas entering from the air inlet pipe 31 is released through the gas channels and the aeration microholes 423, so that aeration and mixing are carried out simultaneously.

[0036] In a preferred embodiment, a plurality of stirring plates 422 are provided at equal intervals between the two air guide rods 421, and there is a gap between adjacent stirring plates 422. The gap facilitates the passage of fluid, reduces resistance, and lowers the energy consumption of the equipment.

[0037] In order to clean the impurities attached to the stirring plate 422, a cleaning unit is provided on the outer wall of the connecting shaft 41. The cleaning unit includes a collar 51 that is sleeved on the outer wall of the connecting shaft 41 and can move along its axial direction. A pair of blades 52 are provided on the circumferential direction of the outer wall of the collar 51. The pair of blades 52 are respectively arranged on both sides of the stirring plate 422. When the collar 51 moves along the axial direction of the connecting shaft 41, the blades 52 can scrape off the impurities on the surface of the stirring plate 422.

[0038] The impurity removal unit is driven by a lifting unit, which includes a lifting ring 61 that is sleeved on the outer wall of the stirring shaft 2 and can move along its axial direction. Multiple connecting plates 62 are circumferentially connected to the outer wall of the lifting ring 61. The side of the connecting plate 62 away from the lifting ring 61 is connected to the collar 51. A lifting sleeve 71 is sleeved on the outer wall of the lifting ring 61. A lead screw 72 is threadedly connected to one side of the lifting sleeve 71, and a guide rod 73 is inserted into the other side. The lead screw 72 and the guide rod 73 are both vertically arranged. The lead screw 72 is driven to rotate back and forth by a motor, which can cause the lifting sleeve 71 to drive the lifting ring 61 to move up and down back and forth. In turn, the connecting plate 62 drives the collar 51 to move up and down back and forth, thus realizing the cleaning work of the blade 52.

[0039] For ease of installation and maintenance, the connecting plate 62 is detachably connected to the lifting ring 61 and the collar 51. Specifically, the outer wall of the collar 51 is provided with connecting ears 53, and each connecting ear 53 is provided with a pair of first connecting holes 54. The bottom of the lifting ring 61 is provided with a lower ring 611, and the lower ring 611 is provided with a number of pairs of second connecting holes 612. The upper and lower ends of the connecting plate 62 are provided with connecting protrusions 621 facing one side. The connecting protrusions 621 are symmetrically provided with third connecting holes 622 that mate with the first connecting holes 54 and the second connecting holes 612. Bolts are passed through the first connecting holes 54, the second connecting holes 612 and the third connecting holes 622, and then nuts are screwed on the bolts to fix the connecting plate 62 to the collar 51 and the lifting ring 61.

[0040] The top of the lifting ring 61 is provided with an upper ring 613, which is rotatably connected to the inside of the lifting sleeve 71. There is a gap between the inner wall of the lifting sleeve 71 and the outer wall of the upper ring 613 to prevent friction between the lifting ring 61 and the lifting sleeve 71 when the stirring shaft 2 drives the lifting ring 61 to rotate, thus ensuring the service life of the equipment.

[0041] To prevent relative rotation between the stirring shaft 2 and the lifting ring 61, the outer wall of the stirring shaft 2 is provided with a shaft protrusion 24 along its axial direction, and the interior of the lifting ring 61 is provided with a shaft groove that matches the shaft protrusion 24 along its axial direction. In this way, the lifting ring 61 can move along the axial direction of the stirring shaft 2, but cannot rotate relative to it.

[0042] To ensure gas sealing, connecting flanges are provided at the bottom of the stirring shaft 2 and on the upper and lower sides of the connecting shaft 41. A first sealing ring 411 is provided on the connecting flange at the top of the connecting shaft 41. An annular sealing groove 412 that matches the first sealing ring 411 is provided on the bottom connecting flanges of the stirring shaft 2 and the connecting shaft 41. To further improve the sealing performance, a sealing ring can be installed in the sealing groove 412.

[0043] The bottom wall of the connecting shaft 41 is provided with a base 8. The bottom of the base 8 is a flange that matches the bottom flange of the connecting shaft 41, and the top is a second sealing ring 81 that matches the sealing groove 412. The base 8 is used to support the entire mixing and aeration unit and to prevent air leakage at the bottom of the connecting shaft 41, which would affect the sealing of the equipment.

[0044] See attached document Figure 8-9 To accommodate treatment tanks or other equipment of different depths, multiple mixing and aeration units can be sequentially installed at the bottom of the mixing shaft 2 to extend the mixing depth and improve the adaptability of the equipment.

[0045] Working principle: Depending on the depth of the treatment tank or other equipment, an appropriate number of agitation and aeration units are installed sequentially at the bottom of the agitator shaft 2. During use, an external air pump supplies air to the rotary joint 3 through the air inlet pipe 31. The gas enters the air guide chamber 21 through the air guide hole 22, and then passes through the gas flow channels in the connecting shaft 41, the air guide rod 421, and the agitator plate 422. Finally, it is released from the aeration micropores 423 to form microbubbles. The rotation of the agitator shaft 2 drives the connecting shaft 41 and the agitation and aeration components 42 to rotate, thereby achieving the combination of flocculation and aeration. When it is necessary to clean the agitator plate 422, the lifting unit is driven by rotating the screw 72, so that the blade 52 moves along the surface of the agitator plate 422 to scrape off impurities.

[0046] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air flotation flocculation stirring device, comprising a support plate (1), characterized in that: The support plate (1) is provided with a stirring shaft (2) that can rotate along its axis. The outer wall of the stirring shaft (2) is fitted with a rotary joint (3) that can rotate relative to it. The rotary joint (3) is connected to an external air pump through an air inlet pipe (31) on one side. The stirring shaft (2) has an air guide cavity (21) that penetrates its bottom wall along its axial direction. The outer wall of the stirring shaft (2) is provided with a number of air guide holes (22) that communicate with the air guide cavity (21). The number of air guide holes (22) are all located inside the rotary joint (3) and communicate with its inner cavity. The bottom of the stirring shaft (2) is connected to a stirring aeration unit. The stirring aeration unit includes a connecting shaft (41) connected to the bottom of the stirring shaft (2). The outer wall of the connecting shaft (41) is provided with a plurality of stirring aeration components (42). The stirring aeration component (42) includes a pair of air guide rods (421) arranged vertically. A stirring plate (422) is provided between the two air guide rods (421). A plurality of aeration microholes (423) are evenly opened on the surface of the stirring plate (422). The connecting shaft (41), the air guide rods (421) and the stirring plate (422) are all provided with interconnected gas flow channels, so that the gas entering from the air inlet pipe (31) is released through the gas flow channels and then through the aeration microholes (423).

2. The air flotation flocculation stirring device as described in claim 1, characterized in that: Multiple stirring plates (422) are provided at equal intervals between the two air guide rods (421), and there is a gap between adjacent stirring plates (422).

3. The air flotation flocculation stirring device as described in claim 1, characterized in that: The outer wall of the connecting shaft (41) is fitted with a cleaning unit. The cleaning unit includes a collar (51) fitted on the outer wall of the connecting shaft (41) and movable along its axial direction. The outer wall of the collar (51) is provided with a pair of blades (52). The pair of blades (52) are respectively arranged on both sides of the stirring plate (422).

4. The air flotation flocculation stirring device as described in claim 3, characterized in that: It also includes a lifting unit, which includes a lifting ring (61) sleeved on the outer wall of the stirring shaft (2) and movable along its axial direction. The outer wall of the lifting ring (61) is circumferentially connected with multiple connecting plates (62). The side of the connecting plate (62) away from the lifting ring (61) is connected to the collar (51). The outer wall of the lifting ring (61) is fitted with a lifting sleeve (71). A screw rod (72) is threadedly connected to one side of the lifting sleeve (71), and a guide rod (73) is inserted into the other side. Both the screw rod (72) and the guide rod (73) are vertically arranged.

5. The air flotation flocculation stirring device as described in claim 4, characterized in that: The connecting plate (62) is detachably connected to the lifting ring (61) and the collar (51). The outer wall of the collar (51) is provided with connecting ears (53) in the circumferential direction. Each connecting ear (53) is provided with a pair of first connecting holes (54). The bottom of the lifting ring (61) is provided with a lower ring (611). The lower ring (611) is provided with a number of pairs of second connecting holes (612) in the circumferential direction. The upper and lower ends of the connecting plate (62) are provided with connecting protrusions (621) facing one side. The connecting protrusions (621) are symmetrically provided with third connecting holes (622) that match the first connecting holes (54) and the second connecting holes (612) so as to facilitate connection by bolts and nuts.

6. The air flotation flocculation stirring device as described in claim 4 or 5, characterized in that: The top of the lifting ring (61) is provided with an upper ring (613), which is rotatably connected to the inside of the lifting sleeve (71).

7. The air flotation flocculation stirring device as described in claim 4, characterized in that: The outer wall of the stirring shaft (2) is provided with a shaft protrusion (24) along its axial direction, and the interior of the lifting ring (61) is provided with a shaft groove that matches the shaft protrusion (24) along its axial direction.

8. The air flotation flocculation stirring device as described in claim 1, characterized in that: The bottom of the stirring shaft (2) and the upper and lower sides of the connecting shaft (41) are provided with connecting flanges. A first sealing ring (411) is provided on the connecting flange at the top of the connecting shaft (41). An annular sealing groove (412) that matches the first sealing ring (411) is opened on the bottom connecting flanges of the stirring shaft (2) and the connecting shaft (41).

9. The air flotation flocculation stirring device as described in claim 8, characterized in that: The bottom wall of the connecting shaft (41) is provided with a base (8), the bottom of the base (8) is a flange that matches the bottom flange of the connecting shaft (41), and the top is a second sealing ring (81) that matches the sealing groove (412).

10. The air flotation flocculation stirring device as described in claim 1, characterized in that: Multiple aeration units are sequentially arranged at the bottom of the stirring shaft (2) to extend the stirring depth.

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