Aeration tower and sewage treatment system

Abstract

The utility model provides an aeration tower and a sewage treatment system. The aeration tower comprises a tower body, a stirring structure and an aeration fan, the bottom of a treatment cavity of the tower body is provided with a plurality of air blowing channels which are arranged along the circumferential direction of the treatment cavity in an array manner, and the air outlet direction of each air blowing channel is inclined to the radial direction of the treatment cavity; the stirring structure comprises a vertically-arranged connecting shaft and a plurality of stirring blades, the connecting shaft is located in the treatment cavity and connected with the tower body, the stirring blades are connected to the outer side of the connecting shaft, the multiple stirring blades are arranged in an array mode in the circumferential direction of the connecting shaft, and the upper end and the lower end of each stirring blade are adjacent to the upper end and the lower end of the treatment cavity respectively; the height of each stirring blade is lower than that of the foam outlet of the tower body; the aeration fan is communicated with each blowing channel, so that rotary airflow is formed in the treatment cavity to push the stirring blades to rotate. Therefore, the energy consumption of sewage treatment is reduced, the sewage treatment effect is improved, and the sewage treatment efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of sewage treatment systems, and in particular to an aeration tower and a sewage treatment system. Background Art

[0002] The metallurgical industry generates a large amount of wastewater during production. Directly discharging this wastewater will cause irreversible damage to the ecological environment and is strictly prohibited. With increasing attention paid to ecological and environmental protection, the wastewater treatment capacity of existing chemical plants is also receiving increasing attention. When treating oily wastewater, chemical plants typically add demulsifiers and flocculants to the wastewater, causing the oil in the wastewater to form flocs. Flotation is then used to cause the flocs to float to the surface of the wastewater, accumulating into a foam layer. This layer is then removed to remove the oil contamination.

[0003] In order to ensure uniform mixing of demulsifiers and flocculants, traditional technology requires the sewage to be continuously stirred by electric stirring paddles to ensure uniform mixing. The flotation method for removing oil stains takes a lot of time. If the stirring paddle is kept on, a lot of energy will be consumed, and the sewage treatment cost will be greatly increased.

[0004] In order to solve the technical problem of high energy consumption, CN242110799U provides an aeration tower for treating wastewater in a chemical plant. When using the aeration tower, a demulsifier and a flocculant are first added to the sewage to be treated, and then the sewage is introduced into the intermediate shell and the inner shell through the liquid inlet. During the introduction process, the air inlet continuously takes in air, and the gas and sewage collide at the air outlet, so that the demulsifier and flocculant in the sewage are mixed more evenly, and more oxygen in the air can be mixed into the sewage. The sewage is added until the upper surface is located at the first foam discharge port position, and then air is continued to be introduced so that the sewage circulates between the inner shell and the intermediate shell. During the flow process, the oil stains are flocculated to form foam that floats to the surface of the sewage. The oxygen in the air oxidizes some metal ions in the sewage to form metal oxide precipitation.

[0005] However, to allow the gas and wastewater to collide and mix at the outlet, the aeration fan's air intake velocity needs to be set high. While this collision can achieve mixing, it also results in a higher flow rate at the water surface, which means the water surface is less smooth. Furthermore, as the wastewater flows downward, it is blocked by baffles, causing it to splash and fall onto the water surface, further degrading the water surface's smoothness. This poor surface smoothness hinders the alum flocs from rising to the surface to form a foam layer, resulting in poor oil removal effectiveness.

[0006] In order to improve the oil removal effect, the addition of sewage is stopped after a certain amount of sewage is added to prevent the new sewage from affecting the smoothness of the water surface. However, this will result in the sewage treatment being unable to proceed continuously, resulting in poor sewage treatment efficiency. Utility Model Content

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an aeration tower and sewage treatment system with low energy consumption, good oil removal effect and high treatment efficiency.

[0008] The purpose of this disclosure is achieved through the following technical solutions:

[0009] An aeration tower, comprising:

[0010] A tower body, wherein the bottom of the processing chamber of the tower body is provided with a plurality of blowing channels arranged in an array along the circumference of the processing chamber, and the gas outlet direction of each blowing channel is inclined to the radial direction of the processing chamber;

[0011] a stirring structure comprising a vertically arranged connecting shaft and a plurality of stirring blades, wherein the connecting shaft is located in the processing chamber and connected to the tower body, wherein each stirring blade is connected to the outside of the connecting shaft, and wherein the plurality of stirring blades are arranged in an array along the circumference of the connecting shaft, wherein the upper and lower ends of each stirring blade are respectively adjacent to the upper and lower ends of the processing chamber, and the height of each stirring blade is lower than the height of the foam discharge port of the tower body; and

[0012] An aeration fan is connected to each of the air blowing channels to form a rotating airflow in the processing chamber to drive the stirring blades to rotate.

[0013] In some embodiments, the aeration tower further includes a blowing structure, which includes an arc-shaped tube and a plurality of blowing parts. The arc-shaped tube is arranged at the periphery of the bottom of the treatment chamber, and the arc-shaped tube is connected to the aeration fan. The plurality of blowing parts are all connected to the arc-shaped tube. The plurality of blowing parts are arranged in a circumferential array along the treatment chamber, and the plurality of blowing channels are respectively formed on the plurality of blowing parts.

[0014] In some embodiments, an air inlet is provided at the bottom of the tower body, and the air blowing structure further includes an air guide pipe, which is passed through the air inlet. The two ends of the air guide pipe are respectively connected to the output end of the aeration fan and the arc pipe, so that the aeration fan is connected to the arc pipe through the air guide pipe.

[0015] In some embodiments, the stirring structure further includes a flow limiting plate, and the flow limiting plate is sleeved on the connecting shaft.

[0016] In some embodiments, the center of the flow limiting plate is sleeved on the connecting shaft.

[0017] In some embodiments, the stirring structure further includes a flow limiting ring connected to the inner peripheral wall of the processing chamber.

[0018] In some embodiments, the stirring blade is provided with a resistance-reducing through hole.

[0019] In some embodiments, the tower body is provided with a sewage discharge inclined surface at the bottom of the processing chamber, and the sewage discharge port is opened at the bottom of the sewage discharge inclined surface.

[0020] In some embodiments, the aeration tower further includes a sewage discharge structure, which includes a sewage discharge pipe and a sewage discharge valve. One end of the sewage discharge pipe is connected to the sewage discharge port, and the sewage discharge valve is located outside the tower body and is arranged on the sewage discharge pipe.

[0021] A sewage treatment system comprises the aeration tower described in any one of the above embodiments.

[0022] Compared with the prior art, the present disclosure has at least the following advantages:

[0023] 1. A plurality of blowing channels are provided at the bottom of the treatment chamber in a circumferential array along the treatment chamber. The air outlet direction of each blowing channel is inclined to the radial direction of the treatment chamber. After the aeration fan is started, the plurality of blowing channels form a rotating airflow at the bottom of the treatment chamber. The rotating airflow drives the stirring structure to rotate, so that the stirring blades of the stirring structure stir the sewage. In this way, stirring is performed while aeration is carried out, and the power of stirring comes from the aeration airflow, which reduces the energy consumption of sewage treatment.

[0024] 2. Because mixing is achieved through the agitator blades, there is no need for mixing through collision between the gas and sewage. This allows the aeration airflow velocity to be lower, thereby reducing the impact of the gas on the smoothness of the water surface. In addition, there is no need to set a baffle at the water inlet to block it, which suppresses the problem of sewage splashing and further reduces the impact of the incoming sewage on the smoothness of the water surface. In this way, since the gas has less impact on the smoothness of the water surface, and the new sewage also has less impact on the smoothness of the water surface, it is conducive to the alum floating to the water surface to form foam, thereby improving the sewage treatment effect.

[0025] 3. Since the newly-input sewage has little effect on the flatness of the water surface, the newly-input sewage has little effect on the treatment effect. While the foam outlet and the sewage outlet are open, sewage, demulsifier and flocculant continue to enter the treatment chamber to keep the sewage level at the same height as the foam outlet. That is, while discharging foam and treated sewage, new sewage, demulsifier and flocculant are added, the continuous treatment of sewage is realized and the sewage treatment efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic structural diagram of an aeration tower according to an embodiment;

[0028] Figure 2 for Figure 1 Another structural schematic diagram of the aeration tower shown.

[0029] Figure numerals: 10, aeration tower; 100, tower body; 101, processing chamber; 102, water inlet; 103, feed inlet; 104, exhaust port; 105, foam discharge port; 106, sewage outlet; 107, air inlet; 108, sewage inclined surface; 200, stirring structure; 210, connecting shaft; 220, stirring blade; 221, resistance reduction hole; 230, flow limiting plate; 240, flow limiting ring; 300, aeration fan; 400, blowing structure; 410, arc tube; 420, blowing part; 421, blowing channel; 430, air guide pipe; 500, sewage discharge structure; 510, sewage pipe; 520, sewage valve; 600, storage structure; 610, bubble inlet pipe; 620, bubble inlet valve; 630, storage box; 640, bubble discharge pipe; 650, bubble discharge valve. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below with reference to specific embodiments:

[0034] like Figure 1 and Figure 2 As shown, an aeration tower 10 according to one embodiment includes a tower body 100, a stirring structure 200, and an aeration fan 300. A treatment chamber 101 is formed within the tower body 100. A water inlet 102, a feed inlet 103, an exhaust port 104, and a foam outlet 105 are formed at the upper end of the tower body 100. The water inlet 102, feed inlet 103, exhaust port 104, and foam outlet 105 are all connected to the treatment chamber 101. The water inlet 102 is used to admit sewage, the feed inlet 103 is used to admit demulsifier and flocculant, the exhaust port 104 is used to exhaust air, and the foam outlet 105 is flush with the sewage level. A sewage outlet 106 is provided at the bottom of the tower body 100. The sewage outlet 106 is connected to the treatment chamber 101 and is used to discharge treated sewage. The bottom of the processing chamber 101 is provided with a plurality of blowing channels 421 arranged in an array along the circumference of the processing chamber 101 . The gas outlet direction of each blowing channel 421 is inclined to the radial direction of the processing chamber 101 .

[0035] It is understandable that the feed port 103 can be omitted, and the sewage can be mixed with the demulsifier and flocculant outside the tower body 100 .

[0036] like Figure 1 and Figure 2As shown, further, the stirring structure 200 includes a vertically arranged connecting shaft 210 and a plurality of stirring blades 220. The connecting shaft 210 is located in the processing chamber 101 and is connected to the tower body 100. Each stirring blade 220 is connected to the outside of the connecting shaft 210. The plurality of stirring blades 220 are arranged in a circumferential array along the connecting shaft 210. The upper and lower ends of each stirring blade 220 are respectively adjacent to the upper and lower ends of the processing chamber 101, so that each stirring blade 220 extends vertically or approaches a vertical extension. The height of each stirring blade 220 is lower than the height of the foam discharge port 105 of the tower body 100, reducing the impact of the stirring blade 220 on the smoothness of the water surface, which is conducive to the alum flocs floating to the water surface and forming foam. The aeration fan 300 is connected to each blowing channel 421, so that a rotating airflow is formed in the treatment chamber 101 to drive the stirring blade 220 to rotate, thereby causing the stirring blade 220 to stir the sewage. In this way, during aeration, the demulsifier and flocculant are evenly mixed in the sewage, causing the oil in the sewage to form alum flocs.

[0037] like Figure 1 and Figure 2 As shown, in this embodiment, the blowing channel 421 is located at the bottom of the treatment chamber 101. After the aeration fan 300 is started, all the sewage in the treatment chamber 101 can be aerated and treated, and a large number of tiny bubbles are formed everywhere in the sewage. The alum flowers in various parts of the sewage can adhere to the bubbles, thereby helping the alum flowers in various parts of the sewage to float to the water surface to form a foam layer. At the same time, the oxygen in the air oxidizes some metal ions in various parts of the sewage to form metal oxide precipitation.

[0038] like Figure 1 and Figure 2 As shown, further, when the aeration tower 10 is working, the sewage enters the treatment chamber 101 through the water inlet 102, and the liquid level of the sewage is kept level with the foam discharge port 105. Then, a demulsifier and flocculant are added to the sewage in the treatment chamber 101 through the feed port 103, and then the aeration fan 300 is started. The aeration fan 300 blows air into the blowing channel 421, causing the stirring structure 200 to rotate. In this way, the demulsifier and flocculant are evenly mixed in the sewage during aeration, so that the oil in the sewage is flocculated into foam and floats to the surface of the sewage, and the gas is finally discharged through the exhaust port 104. After a period of operation, the foam outlet 105 and the sewage outlet 106 are opened, and the foam on the sewage surface is discharged through the foam outlet 105, and the treated sewage at the bottom of the treatment chamber 101 is discharged through the sewage outlet 106. At this time, the water inlet 102 continues to feed sewage, and the feed inlet 103 continues to feed demulsifier and flocculant to keep the sewage level level with the foam outlet 105. From then on, sewage, demulsifier and flocculant continue to enter the treatment chamber 101, and foam and treated sewage at the bottom are continuously discharged. That is, from then on, foam and treated sewage are discharged while new sewage, demulsifier and flocculant are added, thereby realizing continuous treatment of sewage.

[0039] In the above-mentioned aeration tower 10, a plurality of blowing channels 421 are provided at the bottom of the treatment chamber 101 in a circumferential array along the treatment chamber 101. The air outlet direction of each blowing channel 421 is inclined to the radial direction of the treatment chamber 101. After the aeration fan 300 is started, the plurality of blowing channels 421 form a rotating airflow at the bottom of the treatment chamber 101. The rotating airflow drives the stirring structure 200 to rotate, so that the stirring blades 220 of the stirring structure 200 stir the sewage. In this way, stirring is performed while aeration is performed, and the power of stirring comes from the aeration airflow, thereby reducing the energy consumption of sewage treatment.

[0040] Furthermore, because mixing is performed by agitating blades 220, there is no need for mixing through collision between the gas and sewage. This allows for a lower aeration airflow velocity, thereby reducing the impact of the gas on the smoothness of the water surface. Furthermore, no baffle is required at the water inlet 102 to block the flow, thereby suppressing sewage splashing and further reducing the impact of newly introduced sewage on the smoothness of the water surface. This minimizes the impact of the gas on the smoothness of the water surface, and the newly introduced sewage also has a minimal impact on the smoothness of the water surface, which facilitates the alum rising to the water surface to form foam, thereby improving the effectiveness of sewage treatment.

[0041] Furthermore, since the newly introduced sewage has little effect on the flatness of the water surface, the newly introduced sewage has little effect on the treatment effect. While the foam outlet 105 and the sewage outlet 106 are opened, sewage, demulsifier and flocculant continue to enter the treatment chamber 101 to keep the sewage level level with the foam outlet 105, that is, while discharging foam and treated sewage, new sewage, demulsifier and flocculant are added, continuous treatment of sewage is achieved, and sewage treatment efficiency is improved.

[0042] like Figure 1 As shown, in some embodiments, the connecting shaft 210 is located in the processing chamber 101 and is rotatably connected to the tower body 100, and each stirring blade 220 is fixedly connected to the connecting shaft 210. In this embodiment, after the rotating airflow acts on the stirring blade 220, the stirring blade 220 rotates synchronously with the connecting shaft 210. Furthermore, both ends of the connecting shaft 210 are rotatably connected to the tower body 100, thereby improving the rotational stability of the connecting shaft 210.

[0043] like Figure 1 As shown, in another embodiment, the connecting shaft 210 is located in the processing chamber 101 and is fixedly connected to the tower body 100. A plurality of stirring blades 220 are fixedly connected in sequence, and the plurality of stirring blades 220 are all rotatably connected to the connecting shaft 210. In this embodiment, after the rotating airflow acts on the stirring blades 220, the plurality of stirring blades 220 rotate synchronously relative to the connecting shaft 210.

[0044] like Figure 1As shown, in another embodiment, the connecting shaft 210 is located in the processing chamber 101 and is rotatably connected to the tower body 100. A plurality of stirring blades 220 are fixedly connected in sequence, and the plurality of stirring blades 220 are all rotatably connected to the connecting shaft 210. In this embodiment, after the rotating airflow acts on the stirring blades 220, the plurality of stirring blades 220 rotate synchronously relative to the connecting shaft 210, and synchronously, the connecting shaft 210 also rotates relative to the tower body 100.

[0045] like Figure 2 As shown, in some embodiments, the aeration tower 10 further includes a blowing structure 400, which includes an arc-shaped tube 410 and a plurality of blowing members 420. The arc-shaped tube 410 is disposed at the periphery of the bottom of the treatment chamber 101. The arc-shaped tube 410 is connected to the aeration blower 300. The plurality of blowing members 420 are all connected to the arc-shaped tube 410. The plurality of blowing members 420 are arranged in an array along the circumference of the treatment chamber 101, and a plurality of blowing channels 421 are respectively formed in the plurality of blowing members 420. In this embodiment, after the aeration blower 300 is started, the aeration gas enters each of the blowing members 420 through the arc-shaped tube 410, causing the blowing channels 421 of each of the blowing members 420 to blow out gas, thereby forming a rotating gas at the bottom of the treatment chamber 101. The rotating gas drives the stirring blades 220 to rotate, so that the aeration gas can drive the stirring blades 220 to mix the sewage.

[0046] like Figure 1 and Figure 2 As shown, in some embodiments, an air inlet 107 is defined at the bottom of the tower body 100, and the air blowing structure 400 further includes an air guide 430 extending through the air inlet 107. The air guide 430 has two ends connected to the output end of the aeration fan 300 and the curved tube 410, respectively, so that the aeration fan 300 is connected to the curved tube 410 via the air guide 430. In this embodiment, since the aeration fan 300 delivers gas to the curved tube 410 via the air guide 430, the aeration fan 300 is positioned outside the tower body 100, preventing sewage from affecting the normal operation of the aeration fan 300.

[0047] In another embodiment, a plurality of blowing channels 421 are opened at the bottom of the tower body 100 , that is, the blowing channels 421 are directly formed at the bottom of the tower body 100 , thereby eliminating the arc tube 410 and the blowing member 420 and simplifying the structure of the aeration tower 10 .

[0048] like Figure 1As shown, in some embodiments, the stirring structure 200 further includes a flow restrictor 230, which is sleeved onto the connecting shaft 210. In this embodiment, the flow restrictor 230 blocks the gas blown from the blowing channel 421, thereby extending the residence time of oxygen in the sewage and improving sewage treatment efficiency. Furthermore, the flow restrictor 230 reduces the local flow velocity at the water surface, making the water surface more flat, thereby allowing flocculated impurities to float to the liquid surface more easily, further improving sewage treatment efficiency.

[0049] like Figure 1 As shown, further, there are multiple flow limiting plates 230, and the multiple flow limiting plates 230 are arranged at intervals along the extension direction of the connecting shaft 210, thereby improving the blocking effect.

[0050] like Figure 1 As shown, in some embodiments, the center of the flow limiting plate 230 is sleeved on the connecting shaft 210. In this embodiment, the center of the flow limiting plate 230 is sleeved on the connecting shaft 210, so that the connecting shaft 210 is more uniform, which is conducive to extending the service life of the stirring structure 200.

[0051] like Figure 1 As shown, in some embodiments, the stirring structure 200 further includes a flow-restricting ring 240 connected to the inner circumferential wall of the treatment chamber 101. In this embodiment, the flow-restricting ring 240 can block the gas blown from the blowing channel 421, thereby extending the residence time of oxygen in the sewage and improving sewage treatment efficiency. Furthermore, the blocking effect of the flow-restricting ring 240 reduces the local flow velocity at the water surface, making the water surface more flat, thereby allowing flocculated impurities to float to the liquid surface more easily, further improving the sewage treatment effect.

[0052] It can be understood that the flow limiting ring 240 and the flow limiting plate 230 are staggered in the vertical direction to avoid the flow limiting plate 230 and the flow limiting plate 230 completely blocking the rising of the gas, thereby avoiding the problem of the alum flowers being unable to float up.

[0053] like Figure 1 As shown, in some embodiments, the stirring blade 220 is provided with a resistance-reducing through hole 221. In this embodiment, the stirring blade 220 is provided with a resistance-reducing through hole 221, which can reduce the resistance encountered by the stirring blade 220 during rotation, increase the stirring speed of the stirring blade 220, and thus improve the mixing efficiency.

[0054] like Figure 1As shown, in some embodiments, the tower body 100 is provided with a drainage inclined surface 108 at the bottom of the treatment chamber 101, and the drainage outlet 106 is opened at the bottom of the drainage inclined surface 108. In this embodiment, the drainage inclined surface 108 is inclined and the drainage outlet 106 is located at the bottom of the drainage inclined surface 108, which facilitates the guidance of bottom sewage out of the drainage outlet 106, thereby improving the drainage effect.

[0055] like Figure 1 As shown, in some embodiments, the aeration tower 10 further includes a drainage structure 500, which includes a drainage pipe 510 and a drainage valve 520. One end of the drainage pipe 510 is connected to the drainage port 106, and the drainage valve 520 is located outside the tower body 100 and is disposed on the drainage pipe 510. In this embodiment, after the sewage in the treatment chamber 101 is treated, the drainage valve 520 is opened to allow the sewage at the bottom of the treatment chamber 101 to be discharged to the outside through the drainage pipe 510.

[0056] like Figure 1 As shown, in some embodiments, the aeration tower 10 further includes a storage structure 600, which includes a bubble inlet pipe 610, a bubble inlet valve 620, a storage box 630, a bubble exhaust pipe 640, and a bubble exhaust valve 650. One end of the bubble inlet pipe 610 is connected to the foam exhaust port 105, and the bubble inlet valve 620 is arranged on the bubble inlet pipe 610. The storage box 630 is located outside the tower body 100, and the upper end of the storage box 630 is connected to the other end of the bubble inlet pipe 610. One end of the bubble exhaust pipe 640 is connected to the bottom of the storage box 630, and the other end of the bubble exhaust pipe 640 is located outside the storage box 630. The bubble exhaust valve 650 is arranged on the bubble exhaust pipe 640.

[0057] like Figure 1 As shown, in this embodiment, after the wastewater is treated, the foam inlet valve 620 is opened, thereby opening the foam outlet 105. This allows the foam on the water surface to be discharged through the foam outlet 105 and the foam inlet pipe 610 into the storage tank 630 for storage. When the storage tank 630 is full, the foam discharge valve 650 is opened, allowing the foam in the storage tank 630 to be discharged to the outside through the foam discharge pipe 640. In this way, the foam is concentrated in the storage tank 630 and discharged to the outside after a certain amount of foam has been collected. This allows for centralized foam treatment and reduces foam processing costs.

[0058] like Figure 1 and Figure 2As shown, in some embodiments, the working process of the aeration tower 10 is as follows: sewage enters the treatment chamber 101 through the water inlet 102, and the liquid level of the sewage is kept level with the foam discharge port 105. Then, a demulsifier and flocculant are added to the sewage in the treatment chamber 101 through the feed port 103, and then the aeration fan 300 is started. The aeration fan 300 blows air into the blowing channel 421, causing the stirring structure 200 to rotate. In this way, the demulsifier and flocculant are evenly mixed in the sewage during aeration, so that the oil in the sewage is flocculated into foam and floats to the surface of the sewage. The gas is finally discharged through the exhaust port 104. After a period of operation, the bubble inlet valve 620 is opened, allowing the foam on the surface of the sewage to be discharged into the storage tank 630 through the foam outlet 105 and the bubble inlet pipe 610. The sewage valve 520 is opened, allowing the treated sewage at the bottom to be discharged to the outside through the sewage pipe 510. At this time, sewage is continuously introduced into the water inlet 102, and the demulsifier and flocculant are continuously introduced into the feed port 103 to maintain the sewage level at the same level as the foam outlet 105. From then on, sewage, demulsifier, and flocculant continue to enter the treatment chamber 101, and foam and treated sewage at the bottom are continuously discharged. In other words, from then on, while foam and treated sewage are discharged, new sewage, demulsifier, and flocculant are added, continuous sewage treatment is achieved. When the storage tank 630 is full, the bubble discharge valve 650 is opened, allowing the foam in the storage tank 630 to be discharged to the outside through the bubble discharge pipe 640.

[0059] The present disclosure further provides a sewage treatment system, comprising the aeration tower 10 of any of the above embodiments and a sewage supply device, wherein the sewage supply device is connected to the water inlet 102 and is used to pass sewage into the treatment chamber 101.

[0060] Compared with the existing technology, the present disclosure has at least the following advantages:

[0061] 1. The bottom of the treatment chamber 101 is provided with a plurality of blowing channels 421 arranged in a circumferential array along the treatment chamber 101. The air outlet direction of each blowing channel 421 is inclined to the radial direction of the treatment chamber 101. After the aeration fan 300 is started, the plurality of blowing channels 421 form a rotating airflow at the bottom of the treatment chamber 101. The rotating airflow drives the stirring structure 200 to rotate, so that the stirring blades 220 of the stirring structure 200 stir the sewage. In this way, stirring is performed while aeration is performed, and the power of stirring comes from the aeration airflow, which reduces the energy consumption of sewage treatment.

[0062] 2. Because mixing is performed by agitator blades 220, there's no need for gas-wastewater collisions to mix the water. This allows for a lower aeration airflow velocity, reducing the impact of the gas on the water surface smoothness. Furthermore, no baffle is required at the water inlet 102 to block the flow, suppressing wastewater splashing and further minimizing the impact of incoming wastewater on the water surface smoothness. This minimizes the impact of gas on the water surface smoothness, and the impact of incoming wastewater on the water surface smoothness is also minimized, facilitating the rise of alum to the water surface to form foam, thereby improving wastewater treatment effectiveness.

[0063] 3. Since the newly introduced sewage has little effect on the flatness of the water surface, the newly introduced sewage has little effect on the treatment effect. While the foam outlet 105 and the sewage outlet 106 are opened, sewage, demulsifier and flocculant continue to enter the treatment chamber 101 to keep the sewage level level with the foam outlet 105, that is, while discharging foam and treated sewage, new sewage, demulsifier and flocculant are added, thereby realizing continuous sewage treatment and improving sewage treatment efficiency.

[0064] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. An aeration tower, characterized in that: include: A tower body (100), wherein the bottom of a processing chamber (101) of the tower body (100) is provided with a plurality of blowing channels (421) arranged in an array along the circumference of the processing chamber (101), the gas outlet direction of each blowing channel (421) is inclined to the radial direction of the processing chamber (101), and a sewage outlet (106) is opened at the bottom of the tower body (100), and the sewage outlet (106) is connected to the processing chamber (101); A stirring structure (200) comprises a vertically arranged connecting shaft (210) and a plurality of stirring blades (220), wherein the connecting shaft (210) is located in the processing chamber (101) and connected to the tower body (100), each stirring blade (220) is connected to the outside of the connecting shaft (210), and the plurality of stirring blades (220) are arranged in a circumferential array along the connecting shaft (210), the upper and lower ends of each stirring blade (220) are respectively adjacent to the upper and lower ends of the processing chamber (101), and the height of each stirring blade (220) is lower than the height of the foam discharge port (105) of the tower body (100); as well as The aeration fan (300) is connected to each of the air blowing channels (421), so as to form a rotating airflow in the processing chamber (101) to drive the stirring blades (220) to rotate.

2. The aeration tower according to claim 1, characterized in that The aeration tower further includes an air blowing structure (400), the air blowing structure (400) including an arc-shaped tube (410) and a plurality of air blowing parts (420), the arc-shaped tube (410) being arranged at the periphery of the bottom of the treatment chamber (101), the arc-shaped tube (410) being connected to the aeration blower (300), the plurality of air blowing parts (420) being all connected to the arc-shaped tube (410), the plurality of air blowing parts (420) being arranged in a circumferential array along the treatment chamber (101), and the plurality of air blowing channels (421) being respectively formed on the plurality of air blowing parts (420).

3. The aeration tower according to claim 2, characterized in that An air inlet (107) is provided at the bottom of the tower body (100), and the air blowing structure (400) further comprises an air guide pipe (430), the air guide pipe (430) being passed through the air inlet (107), and the two ends of the air guide pipe (430) being respectively connected to the output end of the aeration fan (300) and the arc-shaped pipe (410), so that the aeration fan (300) is connected to the arc-shaped pipe (410) through the air guide pipe (430).

4. The aeration tower according to claim 1, characterized in that The stirring structure (200) further comprises a flow limiting plate (230), and the flow limiting plate (230) is sleeved on the connecting shaft (210).

5. The aeration tower according to claim 4, characterized in that The center of the flow limiting plate (230) is sleeved on the connecting shaft (210).

6. The aeration tower according to claim 1, characterized in that The stirring structure (200) further comprises a flow-limiting ring (240), wherein the flow-limiting ring (240) is connected to the inner peripheral wall of the processing chamber (101).

7. The aeration tower according to claim 1, characterized in that The stirring blade (220) is provided with a resistance-reducing through hole (221).

8. The aeration tower according to claim 1, characterized in that The tower body (100) is provided with a sewage discharge inclined surface (108) at the bottom of the processing chamber (101), and the sewage discharge port (106) is opened at the bottom of the sewage discharge inclined surface (108).

9. The aeration tower according to claim 1, characterized in that The aeration tower further comprises a sewage discharge structure (500), wherein the sewage discharge structure (500) comprises a sewage discharge pipe (510) and a sewage discharge valve (520), one end of the sewage discharge pipe (510) is connected to the sewage discharge port (106), and the sewage discharge valve (520) is located outside the tower body (100) and is arranged on the sewage discharge pipe (510).

10. A sewage treatment system, characterized in that: An aeration tower comprising the aeration tower according to any one of claims 1 to 9.

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