Air floatation device

Abstract

The utility model provides an air floatation device which comprises an air floatation tank body, a dissolved air pipeline system and a scum scraper, the air floatation tank body sequentially comprises a clear water area, a mixing area, a separation area and a scum area along the length direction of the air floatation tank body, and the dissolved air pipeline system extracts clear water from the clear water area to prepare dissolved air water and releases the dissolved air water in the mixing area; the mixing area and the separation area are separated by a partition plate, a circulation channel is formed between the upper part of the partition plate and the air floatation tank body, and the partition plate inclines towards the separation area from bottom to top. The partition plate is arranged to guide water flow to form an annular flow direction, and the water collecting pipe is arranged on a path of the annular flow direction, so that clear water can be quickly collected; moreover, the inclined partition plate can enlarge the annular flow direction of the water flow, so that the internal space of the separation area is fully utilized, and the treatment efficiency and the treatment capacity of the air flotation device are improved; in addition, the inclined partition plate can further reduce the flow rate of the liquid, so that the liquid level is stabilized, and disturbance of water flow to floating scum is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air flotation, in particular to an air flotation device. Background Art

[0002] Dissolved air flotation is one of the most commonly used equipment in the field of solid-liquid separation in water treatment. It dissolves air in water by pressurizing it, and then releases it 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. The suspended particles floating on the water surface are then scraped away by a scraper, thus achieving solid-liquid separation.

[0003] The most common steel structure air flotation on the market is mainly advection air flotation. Figure 1 , advection flotation is generally a rectangular pool, with water entering at one end and flowing to the other end; the rising velocity and advection velocity of advection flotation cannot be too large, otherwise it will affect the separation of slag and the treatment effect will be poor. If the processing capacity of advection flotation is to be increased, the equipment needs to be lengthened and widened, but too wide and too long will affect transportation and lifting. Therefore, the processing capacity of advection flotation is small and the processing efficiency is low, generally not exceeding 150 tons / hour. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an air flotation device for solving the problems of small processing volume and low processing efficiency of advection air flotation in the prior art.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a flotation device, including a flotation tank body, a dissolved air pipeline system and a scraper, the flotation tank body including a clean water area, a mixing area, a separation area and a scum area in sequence along its length direction, the dissolved air pipeline system extracts clean water from the clean water area to prepare dissolved air water, and releases it in the mixing area; the mixing area and the separation area are separated by a partition, and a flow channel is formed between the top of the partition and the flotation tank body, and the partition is inclined from bottom to top toward the separation area; a water collecting pipe for collecting clean water is provided in the separation area, and the water collecting pipe is connected to the clean water area.

[0006] In an embodiment of the present invention, a plurality of flow stabilizing plates are spaced apart in the separation zone, and the flow stabilizing plates are arranged along the length direction of the separation zone.

[0007] In one embodiment of the utility model, the water collecting pipe includes a first pipeline and a second pipeline connected in a "T" shape, the first pipeline is arranged below the flow stabilizer along the width direction of the separation zone and close to one side of the partition; the second pipeline is connected to the clean water area.

[0008] In one embodiment of the utility model, a water inlet is provided at the bottom of the mixing zone, a water distribution plate is provided above the water inlet to separate the mixing zone, and a plurality of through holes are evenly formed on the water distribution plate.

[0009] In one embodiment of the present invention, the dissolved gas pipeline system includes a suction pipeline connected to the clean water zone, and a plurality of release pipelines connected to the mixing zone, and the ends of the release pipelines are connected to releasers.

[0010] In one embodiment of the present invention, the dissolved air pipeline system further comprises a water pump for pumping clean water from the clean water area and a dissolved air chamber for preparing dissolved air water.

[0011] In an embodiment of the present invention, the releaser is inserted into the mixing zone to a certain depth.

[0012] In one embodiment of the utility model, the scraper is installed above the flotation tank body to scrape away the scum on the surface to the scum area.

[0013] In one embodiment of the present invention, a blocking plate is provided at the entrance of the scum zone to prevent the scum from re-entering the separation zone.

[0014] As described above, the air flotation device of the utility model has the following beneficial effects:

[0015] 1. The utility model sets a partition between the separation zone and the mixing zone to guide the water flow to form an annular flow direction, and places the water collecting pipe on the path of the annular flow direction, so as to quickly collect clean water; and the inclined partition can expand the annular flow direction of the water flow, so as to make full use of the internal space of the separation zone and improve the processing efficiency and processing capacity of the flotation device; in addition, the inclined partition can further reduce the liquid flow rate, so as to stabilize the liquid surface, reduce the disturbance of the water flow to the floating scum, and ensure that each part in the separation zone has a high solid-liquid separation efficiency.

[0016] 2. The utility model sets a flow stabilizing plate along the length direction of the separation zone. The flow stabilizing plate divides the separation zone into multiple areas along the width direction, which can block the flow of liquid in the separation zone along the width direction, reduce the flow rate of the liquid in the separation zone, and reduce the disturbance to the floating scum.

[0017] 3. The utility model can avoid water mixing by arranging the clean water area and the scum area at the two ends of the separation area respectively; and a blocking plate is provided at the entrance of the scum area to prevent the scum from re-entering the separation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the advection flotation disclosed in the prior art.

[0019] Figure 2 The utility model is a schematic diagram of the structure of the air flotation device disclosed in the utility model.

[0020] Figure 3 It is a cross-sectional schematic diagram of the air flotation device disclosed in the utility model.

[0021] Component number description

[0022] 100. Flotation tank body; 101. Clean water area; 102. Mixing area; 103. Water collecting pipe; 1031. First pipeline; 1032. Second pipeline; 104. Water distribution plate; 105. Separation area; 106. Scum area; 107. Flow stabilizing plate; 108. Water inlet; 109. Water outlet; 110. Baffle; 200. Dissolved air pipeline system; 201. Releaser; 300. Scum scraper. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 2 and 3 The utility model provides an air flotation device, including an air flotation tank body 100 for treating sewage, an air dissolved pipeline system 200 for preparing air dissolved water so as to float scum to the liquid surface, and a scraper 300 for scraping away the scum floating on the water surface.

[0025] refer to Figure 2 The flotation tank body 100 includes a clean water area 101, a mixing area 102, a separation area 105 and a scum area 106 in sequence along its length direction. The dissolved air pipeline system 200 extracts clean water from the clean water area 101 to prepare dissolved air water, and releases it in the mixing area 102 to mix with sewage; Figure 3 The mixing zone 102 and the separation zone 105 are separated by a partition 110, and a flow channel is formed between the top of the partition 110 and the flotation tank body 100, so that the mixing zone 102 is connected with the top of the separation zone 105, and the partition 110 is inclined from bottom to top toward the separation zone 105; a water collecting pipe 103 for collecting clean water is provided in the separation zone 105, and the water collecting pipe 103 is connected to the clean water zone 101.

[0026] The utility model redesigns and optimizes the structure and flow state of the flotation tank body 100. By setting a partition 110 between the separation zone 105 and the mixing zone 102, the water flow can be guided to form an annular flow direction, and the water collecting pipe 103 is placed on the path of the annular flow direction, so that clean water can be quickly collected; and the inclined partition 110 can expand the annular flow direction of the water flow, thereby fully utilizing the internal space of the separation zone 105 and improving the processing efficiency and processing capacity of the flotation device; in addition, the inclined partition 110 can further reduce the liquid flow rate, thereby stabilizing the liquid level, reducing the disturbance of the water flow to the floating scum, and ensuring that each part in the separation zone 105 has a high solid-liquid separation efficiency.

[0027] Furthermore, a plurality of flow stabilizing plates 107 are arranged at intervals in the separation zone 105, and the flow stabilizing plates 107 are arranged along the length direction of the separation zone 105. The flow stabilizing plates 107 divide the separation zone 105 into a plurality of regions along its width direction, and can block the flow of the liquid in the separation zone 105 along the width direction, and reduce the flow velocity of the liquid in the separation zone 105, thereby reducing the disturbance to the floating scum.

[0028] Furthermore, the water collecting pipe 103 includes a first pipe 1031 and a second pipe 1032 connected in a "T" shape, wherein the first pipe 1031 is arranged below the flow stabilizing plate 107 along the width direction of the separation zone 105 and close to one side of the partition 110; the second pipe 1032 is connected to the clean water zone 101. A water collecting port is provided at the oblique lower part of the first pipe 1031 to facilitate the water flow in the annular direction to enter.

[0029] Furthermore, a water inlet 108 is provided at the bottom of the mixing zone 102, and a water distribution plate 104 is provided above the water inlet 108 to separate the mixing zone 102, and a plurality of through holes are evenly provided on the water distribution plate 104. The provision of the through holes can adjust the flow state of the water flow, dissipate the energy of the water flow, and make it more stable, so that the sewage is evenly distributed in the mixing zone 102. The through hole is preferably a circular hole, and can also be a polygonal hole. In addition, since the water inlet 108 is located below the mixing zone 102, the sewage enters the mixing zone 102 from the bottom, which can reduce the flow rate of the sewage and achieve energy dissipation.

[0030] refer to Figure 2 The dissolved gas pipeline system 200 includes a suction pipeline connected to the clean water area 101 and a plurality of release pipelines connected to the mixing area 102. The ends of the release pipelines are connected to releasers 201, which are inserted to a certain depth in the mixing area 102. The dissolved gas pipeline system 200 also includes a water pump for pumping clean water from the clean water area 101 and a dissolved gas chamber for preparing dissolved gas water.

[0031] refer to Figure 3The scraper 300 is installed above the flotation tank 100 to scrape the scum on the surface to the scum area 106. A blocking plate is provided at the entrance of the scum area 106 to prevent the scum from re-entering the separation area 105. The utility model can avoid water mixing by arranging the clear water area 101 and the scum area 106 at the two ends of the separation area 105, thereby making the solid-liquid separation more efficient.

[0032] When in use, sewage flows into the mixing zone 102 from the water inlet 108, and flows upward evenly through the through holes evenly distributed on the water distribution plate 104; the dissolved air pipeline system 200 draws clean water from the clean water zone 101 through a water pump to produce pressurized dissolved air water, which is decompressed in the releaser 201 and released to the surroundings, thereby generating a large number of dense bubbles in the mixing zone 102, which flow to the separation zone 105 after being fully mixed with the sewage; under the action of the partition 110, the water flow forms a ring flow direction, flows into the water collecting pipe 103, and merges into the clean water zone 101. At the same time, the suspended matter is lifted to the liquid surface by the bubbles, and the scraper 300 scrapes it to the scum zone 106.

[0033] In summary, the utility model can quickly collect clean water by setting a baffle between the separation zone and the mixing zone to guide the water flow to form an annular flow direction, and placing the water collecting pipe on the path of the annular flow direction; and the inclined baffle can expand the annular flow direction of the water flow, thereby making full use of the internal space of the separation zone and improving the processing efficiency and processing capacity of the flotation device; in addition, the inclined baffle can further reduce the liquid flow rate, thereby stabilizing the liquid level, reducing the disturbance of the water flow to the floating scum, and ensuring that all parts of the separation zone have a high solid-liquid separation efficiency. Therefore, the utility model effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0034] 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.

[0035] 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 air flotation device, characterized in that: It includes a flotation tank body, a dissolved air pipeline system and a scraper. The flotation tank body includes a clean water area, a mixing area, a separation area and a scum area in sequence along its length direction. The dissolved air pipeline system extracts clean water from the clean water area to prepare dissolved air water, and releases it in the mixing area. The mixing area and the separation area are separated by a partition, and a flow channel is formed between the top of the partition and the flotation tank body. The partition is inclined from bottom to top toward the separation area. A water collecting pipe for collecting clean water is provided in the separation area, and the water collecting pipe is connected to the clean water area.

2. An air flotation device according to claim 1, characterized in that: A plurality of flow stabilizing plates are also arranged at intervals in the separation zone, and the flow stabilizing plates are arranged along the length direction of the separation zone.

3. An air flotation device according to claim 2, characterized in that: The water collecting pipe comprises a first pipeline and a second pipeline connected in a "T" shape, wherein the first pipeline is arranged below the flow stabilizing plate along the width direction of the separation zone and close to one side of the partition; The second pipeline is connected to the clean water area.

4. The air flotation device according to claim 1, characterized in that: A water inlet is provided at the bottom of the mixing zone, a water distribution plate is provided above the water inlet to separate the mixing zone, and a plurality of through holes are evenly formed on the water distribution plate.

5. The air flotation device according to claim 1, characterized in that: The dissolved gas pipeline system comprises a suction pipeline connected to the clean water zone and a plurality of release pipelines connected to the mixing zone, and the ends of the release pipelines are connected to releasers.

6. An air flotation device according to claim 5, characterized in that: The dissolved air pipeline system also includes a water pump for pumping clean water from the clean water area and a dissolved air cavity for preparing dissolved air water.

7. An air flotation device according to claim 5, characterized in that: The releaser is inserted into the mixing zone to a certain depth.

8. The air flotation device according to claim 1, characterized in that: The scraper is installed above the air flotation tank body and is used to scrape away the scum on the surface to the scum area.

9. An air flotation device according to claim 8, characterized in that: A blocking plate is provided at the entrance of the scum zone to prevent the scum from re-entering the separation zone.

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