Opposite-direction entrainment air floatation tank

Abstract

The utility model provides an opposite-direction entrainment air floatation tank which comprises an air floatation tank body, a dissolved air pipeline system and a slag scraper, a separation area is arranged in the middle of the air floatation tank body, release areas are respectively arranged on two sides of the separation area, the release areas are communicated with the separation area at the upper part, and a water distribution area is arranged at the bottom of each release area. Two water collecting assemblies matched with the release area are arranged in the separation area in the length direction of the separation area; one end of the air floatation tank body is provided with a water distribution area communicated with the water inlet, the water distribution area is respectively communicated with the water distribution areas on the two sides, the other end of the air floatation tank body is sequentially provided with a clear water area and a water outlet area which are communicated with each other, the lower part of the clear water area is communicated with the water collecting assembly, and the water outlet area is communicated with the water outlet. According to the air floatation tank, the structure of the air floatation tank is optimized, and the release areas for mixing the air-dissolved water and the sewage are arranged on the two sides of the separation area, so that the contact area of the air-dissolved water and the sewage can be enlarged, the air-dissolved water and the sewage enter the separation area after being fully and uniformly mixed, and the separation efficiency and the separation effect of impurities in the sewage are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air flotation, in particular to a counter-flow air flotation tank. Background Art

[0002] Dissolved air flotation is one of the most commonly used equipment in the field of solid-liquid separation in water treatment. Air is dissolved in water by pressurization, and then released to normal pressure. The air dissolved in water precipitates from the water in the form of tiny bubbles, floating the suspended particles in the water on the water surface, and then the suspended particles floating on the water surface are scraped away by a scraper, thereby achieving solid-liquid separation.

[0003] Common steel structure flotation on the market include horizontal flotation and shallow flotation. The dissolved air microbubbles in the separation zone gradually decrease from the water inlet to the outlet, resulting in a corresponding decrease in load. In addition, factors such as the high water flow rate in the separation zone have limited the load increase of traditional flotation. In recent years, the construction of steel concrete pools has been adopted to increase the surface load by reducing the length-to-width ratio, but it has mainly focused on water with low solid content. The promotion and use of complete sets of equipment is often limited by transportation restrictions.

[0004] In order to solve the defects of horizontal flotation and shallow flotation, the inventor proposed a semi-volume flotation tank (patent number: CN202221185708.5). However, the contact area between dissolved air water and sewage in this semi-volume flotation tank is small, resulting in poor impurity separation efficiency and effect. In addition, due to the limitations of water flow direction and the number of water collection pipes in the semi-volume flotation, the water collection capacity of the water collection pipe is relatively small. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a counter-volute flotation tank for solving the problems of small processing capacity and low processing efficiency of the semi-volute flotation tank in the prior art.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a counter-flow flotation tank, comprising:

[0007] An air flotation pool body, wherein a separation zone is provided in the middle of the air flotation pool body, release zones are provided on both sides of the separation zone, the release zone and the separation zone are connected at the top, the bottom of the release zone is a water distribution zone, and two water collection components cooperating with the release zone are provided in the separation zone along its length direction; a water distribution zone connected to the water inlet is provided at one end of the air flotation pool body, and the water distribution zone is respectively connected to the water distribution zones on both sides, and a clean water zone and a water outlet zone are provided at the other end of the air flotation pool body in sequence, the bottom of the clean water zone is connected to the water collection component, and the water outlet zone is connected to the water outlet;

[0008] A dissolved air pipeline system, wherein the dissolved air pipeline system extracts clean water from the clean water area to prepare dissolved air water, and releases the dissolved air water in the release area;

[0009] A scraper is installed above the flotation tank body and is used to scrape away the scum on the surface to the scum collection area.

[0010] In one embodiment of the utility model, the water distribution area and the release area are separated by a water distribution plate, and a plurality of through holes are evenly opened on the water distribution plate to adjust the flow state of water so that sewage enters the release area more stably.

[0011] In one embodiment of the present invention, a plurality of flow stabilizing components arranged at even intervals are provided in the separation zone, and the water collecting component is located below the flow stabilizing components.

[0012] In one embodiment of the present invention, a plurality of bucket-shaped sedimentation areas are provided at the bottom of the separation area, and sewage outlets are respectively provided on both sides of the bottom of the sedimentation area.

[0013] In one embodiment of the present invention, the two water collection components are symmetrically arranged in the separation zone, and the water collection components are located a certain distance above the sedimentation zone.

[0014] In one embodiment of the utility model, the dissolved air pipeline system includes an absorption pipeline connected to the clean water area for absorbing clean water in the clean water area, and a plurality of release pipelines connected to the release area for injecting dissolved air water into sewage, and the ends of the release pipelines are connected to releasers.

[0015] In one embodiment of the present invention, the scum collection area is located between the separation area and the clean water area, the top of the scum collection area is connected to the separation area, and the scum collection area is separated from the clean water area and is not connected.

[0016] In one embodiment of the present invention, a blocking plate is provided at the outlet of the scum collecting area to prevent the scum from re-entering the separation area.

[0017] As described above, the utility model of a counter-flow flotation tank has the following beneficial effects:

[0018] 1. The utility model optimizes the structure of the flotation tank, and sets release areas for mixing dissolved air water and sewage on both sides of the separation zone, which can increase the contact area between dissolved air water and sewage, so that the dissolved air water and sewage are fully mixed and then enter the separation zone, thereby improving the separation efficiency and effect of impurities in sewage.

[0019] 2. The utility model provides release zones on both sides of the separation zone, so that the water flows entering from both sides can be collected by two flow collecting components, which has a better water collection effect and improves the treatment efficiency and treatment capacity of the flotation tank.

[0020] 3. The utility model symmetrically arranges the release area and the current collecting assembly, and the water flow impulses on both sides can offset each other, thereby reducing the flow rate, stabilizing the liquid level, and achieving a better scraping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a schematic diagram of the overall structure of the counter-flow flotation tank disclosed in the embodiment of the utility model.

[0022] Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction.

[0023] Figure 3 for Figure 1 Schematic diagram of the cross section along the BB direction.

[0024] Figure 4 for Figure 1 Schematic diagram of the cross section along the CC direction.

[0025] Component number description

[0026] 100. Flotation tank body; 101. Water distribution area; 102. Water distribution area; 103. Water distribution plate; 104. Release area; 105. Separation area; 106. Flow stabilization component; 107. Water collection component; 108. Scum collection area; 109. Clean water area; 110. Water outlet area; 111. Water inlet; 112. Water outlet; 113. Sedimentation area; 200. Dissolved air pipeline system; 201. Suction pipeline; 202. Release pipeline; 203. Releaser; 204. Water pump; 205. Dissolved air chamber; 300. Scum scraper. DETAILED DESCRIPTION

[0027] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] See also Figure 1 The utility model provides a counter-flow flotation tank, including a flotation tank body 100 for treating sewage, a dissolved air pipeline system 200 for preparing dissolved air water so as to float suspended particles to the liquid surface, and a scraper 300 for scraping away scum floating on the water surface.

[0029] Reference Figure 1 and 4A separation zone 105 is provided in the middle of the air flotation pool body 100, and release zones 104 are provided on both sides of the separation zone 105. The release zone 104 and the separation zone 105 are connected at the top, and the bottom of the release zone 104 is a water distribution zone 102. Two water collection components 107 cooperating with the release zone 104 are provided in the separation zone 105 along its length direction; a water distribution zone 101 connected to the water inlet 111 is provided at one end of the air flotation pool body 100, and the water distribution zone 101 is respectively connected to the water distribution zones 102 on both sides. The sewage flows into the water distribution area 101 from the water inlet 111, and after energy dissipation in the water distribution area 101, it is distributed through the water distribution area 101 and flows into the water distribution areas 102 on both sides; the other end of the flotation tank body 100 is provided with a clean water area 109 and a water outlet area 110 which are connected in sequence, the lower part of the clean water area 109 is connected to the water collection component 107, and the water outlet area 110 is connected to the water outlet 112; the dissolved air pipeline system 200 draws clean water from the clean water area 109 to prepare dissolved air water, and releases it in the release area 104.

[0030] The utility model optimizes the structure of the flotation tank, and release areas 104 for mixing dissolved air water and sewage are arranged on both sides of the separation area 105, which can increase the contact area between the dissolved air water and the sewage, so that the dissolved air water and the sewage are fully mixed and then enter the separation area 105, thereby improving the separation efficiency and effect of impurities in the sewage.

[0031] Reference Figure 1 and 4 The water distribution area 102 and the release area 104 are separated by a water distribution plate 103. The water distribution plate 103 is evenly provided with a number of through holes, which can adjust the flow state of the water flow to make it more stable, so that the sewage is evenly distributed in the release area 104; the through holes are preferably circular holes, and can also be polygonal holes. In addition, since the water distribution area 102 is located below the release area 104, the sewage flows into the water distribution area 102 at the bottom of the release area 104, which can reduce the flow rate of the sewage and achieve energy dissipation.

[0032] Reference Figure 1 and 3 , a plurality of flow stabilizing components 106 arranged at even intervals are provided in the separation zone 105, and the flow stabilizing components 106 can stabilize the liquid surface state, thereby reducing the disturbance to the floating scum. Among them, the flow stabilizing components 106 are baffles, and a plurality of baffles are evenly fixed on the pool wall of the separation zone 105, dividing the separation zone 105 into multiple areas, thereby reducing the flow velocity in the separation zone 105 and achieving steady flow. Furthermore, the water collection component 107 is arranged below the flow stabilizing component 106, so that the water flow passes through the steady flow of the flow stabilizing component before entering the water collection component.

[0033] Reference Figure 3 and 4At the bottom of the separation zone 105, there are several sedimentation zones 113 for discharging the sludge that sinks in the sewage; the sedimentation zone 113 is bucket-shaped, and sewage outlets are respectively provided on both sides of the bottom of the sedimentation zone 113, so that the sludge can be discharged from the sewage outlets at the bottom of the sedimentation zone 113 along the slope.

[0034] To ensure that the water collection assembly 107 can better collect clean water, two water collection assemblies 107 are symmetrically arranged in the separation area 105, and the water collection assembly 107 is located a certain distance above the sedimentation area 113, so that the water collection assembly 107 is located on the path of the annular flow direction, which can better collect clean water. Among them, the water collection assembly 107 is preferably a water collection pipe, and a water collection port is opened at the bottom thereof, and the collected clean water is transported to the clean water area 109 along its length direction.

[0035] Reference Figure 1 and 2 The dissolved air pipeline system 200 includes a suction pipeline 201 connected to the clean water area 109 for sucking clean water in the clean water area 109, and a plurality of release pipelines 202 connected to the release area 104 for injecting dissolved air into the sewage, and the ends of the release pipelines 202 are connected to releasers 203. Among them, a water pump 204 for pumping clean water from the clean water area 109 is provided on the suction pipeline 201, and a dissolved air cavity 205 for adding pressurized air into the clean water to prepare dissolved air water is provided between the suction pipeline 201 and the release pipeline 202. Further, the release pipelines 202 are evenly arranged on the top of the pool body of the release area 104 and inserted into the release area 104 to a certain depth.

[0036] Reference Figure 3 The scraper 300 is installed above the flotation tank 100 to scrape the scum on the surface of the liquid to the scum collection area 108. The scum collection area 108 is located between the separation area 105 and the clean water area 109. The top of the scum collection area 108 is connected to the separation area 105, and the scum collection area 108 is separated from the clean water area 109 and is not connected; at the same time, a blocking plate is provided at the outlet of the scum collection area 108 to prevent the scum from re-entering the separation area 105.

[0037] During operation, sewage flows into the water distribution area 101 from the water inlet 111, dissipates energy in the water distribution area 101, and then flows into the water distribution areas 102 on both sides of the pool body under the distribution of the water distribution area 101. The sewage is evenly distributed in the release area 104 through the through holes through the water distribution plate 103 arranged on the water distribution area 102. The dissolved air pipeline system 200 extracts clean water from the clean water area 109 to prepare dissolved air water, which is released in the releaser 203 in the release area 104 to generate a large number of tiny bubbles, which are fully After mixing, it flows to the separation area 105, and the suspended particles slowly float to the liquid surface in the separation area 105. The water flow needs to pass through the flow stabilizing component 106 before flowing into the water collecting component 107, which can stabilize the liquid surface state and reduce the disturbance to the floating scum, so that the scraper 300 can better scrape the scum on the liquid surface to the scum collecting area 108; the water flows through the water collecting component 107 and flows into the clean water area 109, part of which flows to the water outlet area 110, and part of which is sucked away by the dissolved air pipeline system 200, thereby forming a cycle.

[0038] In summary, the utility model optimizes the structure of the flotation tank, and sets release areas for mixing dissolved air water and sewage on both sides of the separation zone, which can increase the contact area between dissolved air water and sewage, so that dissolved air water and sewage are fully mixed and then enter the separation zone, thereby improving the separation efficiency and effect of impurities in sewage. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0039] Among them, the terms such as "upper", "lower", "left", "right", "front", "back", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An opposed flow flotation tank, characterized in that: include: An air flotation pool body, wherein a separation zone is provided in the middle of the air flotation pool body, release zones are provided on both sides of the separation zone, the release zone and the separation zone are connected at the top, the bottom of the release zone is a water distribution zone, and two water collection components cooperating with the release zone are provided in the separation zone along its length direction; a water distribution zone connected to the water inlet is provided at one end of the air flotation pool body, and the water distribution zone is respectively connected to the water distribution zones on both sides, and a clean water zone and a water outlet zone are provided at the other end of the air flotation pool body in sequence, the bottom of the clean water zone is connected to the water collection component, and the water outlet zone is connected to the water outlet; A dissolved air pipeline system, wherein the dissolved air pipeline system extracts clean water from the clean water area to prepare dissolved air water, and releases the dissolved air water in the release area; A scraper is installed above the flotation tank body and is used to scrape away the scum on the surface to the scum collection area.

2. The counter-flow flotation tank according to claim 1, characterized in that: The water distribution area and the release area are separated by a water distribution plate, and a plurality of through holes are evenly opened on the water distribution plate to adjust the flow state of water so that the sewage enters the release area more stably.

3. The counter-flow flotation tank according to claim 1, characterized in that: A plurality of flow stabilizing components arranged at even intervals are arranged in the separation zone, and the water collecting component is located below the flow stabilizing components.

4. An opposed vortex flotation tank according to any one of claims 1 to 3, characterized in that: A plurality of bucket-shaped sedimentation areas are arranged at the bottom of the separation area, and sewage outlets are respectively arranged on both sides of the bottom of the sedimentation area.

5. The counter-flow flotation tank according to claim 4, characterized in that: The two water collection components are symmetrically arranged in the separation zone, and the water collection components are located a certain distance above the sedimentation zone.

6. The counter-flow flotation tank according to claim 1, characterized in that: The dissolved air pipeline system includes an absorption pipeline connected to the clean water area for absorbing clean water in the clean water area, and a plurality of release pipelines connected to the release area for injecting dissolved air water into sewage, and the ends of the release pipelines are connected to releasers.

7. The counter-flow flotation tank according to claim 1, characterized in that: The scum collection area is located between the separation area and the clean water area. The top of the scum collection area is connected to the separation area, and the scum collection area is separated from the clean water area and is not connected.

8. The counter-flow flotation tank according to claim 7, characterized in that: A blocking plate is provided at the outlet of the scum collecting zone for blocking the scum from re-entering the separation zone.

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