Advection air floatation tank

Abstract

The utility model discloses an advection floatation tank, including: reaction chamber, contact chamber and separation chamber, the upper part of separation chamber is provided with the slag scraper, and the bottom is provided with the water outlet pipe and mud pipe, the slag scraper includes: power component and scraping plate, power component is located between the deflector of separation chamber and the slag collecting tank, and the scraping plate is located in the slag collecting tank. The overall length is smaller than the distance between the guide plate and the slag collecting groove; the slag scraping plate is arranged on the power assembly, the upper portion of the slag scraping plate is a supporting portion, the lower portion of the slag scraping plate is a slag scraping portion, and the slag scraping portion is detachably connected with the supporting portion and made of flexible materials. When the slag scraping plate runs to the slag collecting groove, the slag scraping part is attached to the slag collecting groove, so that the installation height of the slag scraping plate can be reduced, the problem of collision damage is avoided, and scum in the separation chamber can be effectively cleaned. The water outlet pipe is arranged at the lower part of the separation chamber, and the height of the water outlet pipe is adjustable, so that the distance between the water outlet pipe and the sludge discharge pipe can be adjusted according to the sludge precipitation condition, and the water outlet smoothness and the water outlet quality are ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment equipment, specifically to a horizontal flow flotation tank. Background Technology

[0002] Horizontal flow flotation tanks are commonly used wastewater treatment equipment in the wastewater treatment industry. They are suitable for various water treatment scenarios that require the removal of suspended solids and are widely used in wastewater treatment in various industrial enterprises.

[0003] like Figure 1 As shown, the horizontal flow dissolved air flotation (DAF) tank mainly consists of a flotation tank body 1, dissolved air components, a sludge scraper 15, an inlet pipe 11, an outlet pipe 16, and a sludge discharge pipe 17. The flotation tank body 1 is divided into a reaction chamber 12, a contact chamber 13, and a separation chamber 14. The upper part of the separation chamber 14 is equipped with a sludge scraper 11 for scraping sludge, and the lower part contains the outlet pipe 16 and the sludge discharge pipe 17. Wastewater (raw water) passing through the reaction chamber 12 enters the contact chamber 13 from the bottom of the flotation tank. After the wastewater particles are fully combined with microbubbles in the contact chamber 13, they enter the separation chamber 14 along the guide plate 18, thus separating the sludge and water. The sludge floating on the water surface is scraped into the sludge collection tank 19 by the sludge scraper. The treated water is discharged from the outlet pipe 16 at the bottom of the tank, while the sludge with higher particle density that does not adhere to the bubbles and floats to the surface is discharged from the sludge discharge pipe 17 below the outlet pipe 16.

[0004] The currently used horizontal flow dissolved air flotation tanks have the following problems:

[0005] 1. The scraper blades of the slag scraper are mostly made of metal. If the scraper blades are positioned too low, they will collide with the edge of the guide plate 18 and / or the slag collection trough 19. If the scraper blades are positioned too high, they will not be effective at scraping mud.

[0006] 2. The outlet pipe 16 is located at the bottom. When there is a lot of sedimented sludge, it is easy to accumulate at the bottom of the separation chamber 14, which will affect the quality of the effluent and may also block the outlet pipe 16, causing poor water flow. Summary of the Invention

[0007] To address the aforementioned issues, this utility model provides a horizontal flow flotation tank. The scraping part at the bottom of the scraper plate is replaced with a flexible material, which reduces its installation height, avoiding collision damage while effectively cleaning the scum in the separation chamber. At the same time, the outlet pipe is configured with adjustable height, allowing adjustment of the outlet height according to the sludge sedimentation situation, ensuring smooth water flow and water quality.

[0008] Specifically, this utility model is implemented as follows:

[0009] A horizontal flow dissolved air flotation tank includes: a reaction chamber, a contact chamber, and a separation chamber. A sludge scraper is installed at the top of the separation chamber, and a water outlet pipe and a sludge discharge pipe are installed at the bottom. The sludge scraper includes:

[0010] The power unit is located between the guide plate and the slag collection trough in the separation chamber, and its overall length is less than the distance between the guide plate and the slag collection trough.

[0011] A slag scraper is mounted on the power assembly. Its upper part is a support part and its lower part is a slag scraping part. The slag scraping part is detachably connected to the support part. The slag scraping part is made of flexible material. When the slag scraper runs to the slag collection trough, the slag scraping part is in contact with the slag collection trough.

[0012] The water outlet pipe is located at the bottom of the separation chamber, and the water outlet pipe is configured to be height adjustable to adjust the distance between the water outlet pipe and the sludge discharge pipe.

[0013] Furthermore, a sludge hopper is provided at the bottom of the separation chamber, and the sludge discharge pipe is located at the bottom of the sludge hopper.

[0014] Furthermore, the water outlet pipe includes:

[0015] The water outlet section is equipped with several water outlet holes;

[0016] A support section is provided at both ends of the water outlet section, and the support section is rotatably connected to the side wall of the separation chamber; the water outlet section and the support section are located on different axes;

[0017] An adjustment component, connected to a support section near the contact chamber, is used to drive the outlet pipe to rotate in order to adjust the height of the outlet section.

[0018] Furthermore, the support segment includes:

[0019] The horizontal section is rotatably connected to the side wall of the separation chamber via a sealed bearing;

[0020] The inclined section is connected at both ends to the horizontal section and the water outlet section, respectively.

[0021] Furthermore, the adjustment component includes:

[0022] drive shaft;

[0023] The transmission assembly is located on the horizontal part near the contact chamber and is connected to the drive shaft. The horizontal parts of two adjacent water outlet pipes near the contact chamber are also connected.

[0024] Furthermore, a receiving cavity is provided on the partition between the separation chamber and the contact chamber, and the transmission assembly is located in the receiving cavity.

[0025] Furthermore, the drive shaft extends upwards above the flotation tank, and a handwheel is provided at its top.

[0026] Furthermore, the adjustment component also includes:

[0027] The driving component is connected to the drive shaft and is used to drive the water outlet pipe to rotate.

[0028] Furthermore, the sludge hopper is W-shaped;

[0029] The sludge discharge pipe is perpendicular to the water outlet section, and the sludge discharge pipe is provided with several sludge discharge holes.

[0030] Furthermore, the scraper part is made of rubber.

[0031] The working principle of this utility model:

[0032] (1) The overall length of the power component (chain and sprocket) is less than the distance between the guide plate 18 and the slag collection trough 19, so that after the height of the scraper plate 151 is reduced, it will no longer collide with the guide plate 18 and the slag collection trough 19 during the movement. At the same time, the upper part of the scraper plate 151 is a metal part, which serves as a support to ensure its support strength. The lower part is made of flexible material, which can completely fit the inlet inclined plate 191 of the slag collection trough 19 to scrape mud, so that the scum 81 in the flotation tank can also be effectively cleaned near the slag collection trough 19, thereby improving the service life of the scraper plate 151 and improving the cleaning efficiency.

[0033] (2) When the sludge settles to the bottom of the separation chamber 14, it is discharged by the sludge discharge pipe 3. After the sewage has been treated for a period of time, there is a lot of sludge and flocculent 82, which is easy to accumulate at the bottom of the separation chamber 14, affecting the quality of the effluent and easily clogging the effluent pipe 2, causing poor effluent flow. At this time, the effluent pipe 2 can be rotated by adjusting the component 7. When the zigzag effluent pipe 2 is rotated, the middle effluent section 22 can be rotated to a higher position, and the sludge and flocculent 82 at the bottom will not easily enter the effluent pipe 2. This way, the effluent can be discharged normally and the effluent quality can be guaranteed.

[0034] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0035] (1) This utility model provides a horizontal flow flotation tank, which can effectively improve the cleaning efficiency of scum and the service life of scum scraping, and at the same time effectively solve the problem of excessive sedimentation sludge causing blockage of the outlet pipe, thus ensuring the quality of the effluent.

[0036] (2) A sludge hopper is installed at the bottom of the separation chamber, which can effectively avoid the problem of large-area sludge caking and accumulation caused by the flat bottom, facilitate the collection of sludge, and improve the sewage discharge efficiency. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of an existing horizontal flow dissolved air flotation tank;

[0038] Figure 2 This is a schematic diagram of the horizontal flow flotation tank in Example 1;

[0039] Figure 3 This is a top view of the horizontal flow flotation tank in Example 1;

[0040] Figure 4 for Figure 3 Schematic diagram of the AA section;

[0041] Figure 5 for Figure 3 Schematic diagram of the BB cross section;

[0042] Figure 6 This is a schematic diagram of the slag scraper in Example 1;

[0043] Figure 7 This is a schematic diagram of the water outlet pipe in Example 1;

[0044] Figure 8 This is a schematic diagram of the rotation of the water outlet pipe in Example 1.

[0045] Figure label:

[0046] 1-Air flotation tank body; 11-Inlet pipe; 12-Reaction chamber; 13-Contact chamber; 14-Separation chamber; 15-Scum scraper; 151-Scum scraper plate; 152-Support section; 153-Scum scraper section; 16-Outlet pipe; 17-Sludge discharge pipe; 18-Guide plate; 19-Sludge collection trough; 191-Inlet inclined plate; 2-Outlet pipe; 21-Support section; 211-Horizontal section; 212-Inclined section; 22-Outlet section; 23-Sealed bearing; 3-Sludge discharge pipe; 4-Sludge hopper; 5-Outlet chamber; 51-Outlet; 6-Receiving chamber; 7-Adjusting component; 71-Drive shaft; 72-Motor; 73-Handwheel; 74-Synchronous chain sprocket; 81-Scum; 82-Sludge and flocculents. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0048] Example 1

[0049] like Figure 2-5 As shown, this embodiment provides a horizontal flow flotation tank, including a reaction chamber 12, a contact chamber 13, and a separation chamber 14. Wastewater enters the reaction chamber 12 and then flows from the bottom of the reaction chamber 12 into the contact chamber 13. After fully combining with microbubbles in the contact chamber 13, it flows along the guide plate 18 into the separation chamber 14 for sludge-water separation. The separation chamber 14 is separated from the contact chamber 13 by a partition. An outlet chamber 5 is provided on the other side of the separation chamber 14. A sludge scraper 15 is located at the top of the separation chamber 14, and a sludge collection trough 19 is located on one side of the top. The sludge scraper 15 scrapes the scum 81 into the sludge collection trough 19 for collection. An outlet pipe 2 and a sludge discharge pipe 3 are provided at the bottom of the separation chamber 14. The outlet pipe 2 is connected to the outlet chamber 5, and the effluent enters the outlet chamber 5 for storage. After reaching a certain height, the effluent exits from the outlet 51 at the top.

[0050] The slag scraper 15 includes a power unit and a scraper plate 151. The power unit mainly consists of a drive motor and a chain and sprocket. The scraper plate 151 is mounted on the chain and moves with the chain. When it is in a low position, it scrapes the slag 81 on the surface of the separation chamber 14 into the slag collection trough 19. Specifically, as shown... Figure 6 As shown, the scraper plate 151 includes a support part 152 and a scraping part 153. The support part 152 occupies one-third of the scraper plate 151 and is made entirely of metal, providing sufficient support and stability. The scraping part 153 occupies two-thirds of the scraper plate 151 and is made of rubber with moderate hardness. This allows the scraper plate 151 to be installed at a relatively low position above the water surface, enabling effective cleaning of the scum 81 in the separation chamber 14. The chain sprocket is arranged close to the scum collection trough 19, and its overall length is less than the distance between the guide plate 18 and the scum collection trough 19. During the scraping process, the scraper plate 151 can avoid the guide plate 18. At the same time, when it runs to the scum collection trough 19, the rubber scraping part 153 at the bottom of the scraper plate 151 fits against the inlet inclined plate 191 of the scum collection trough 19, so that the scum 81 in the separation chamber 14 is also effectively cleaned near the scum collection trough 19.

[0051] The lower part of the separation chamber 14 is equipped with a sludge hopper 4, a water outlet pipe 2, and a sludge discharge pipe 3. The sludge hopper 4 is W-shaped, and its sloping design prevents large-scale caking and accumulation of sludge and flocculent material 82 at the bottom of the separation chamber 14, which could lead to discharge problems. Two sludge discharge pipes 3 are installed at the two lowest points of the sludge hopper 4. The sludge discharge pipes 3 are made of DN125 stainless steel and are approximately 2.5 meters long each. The sludge discharge pipes 3 are connected to the drain valve. Sludge discharge holes (25mm in diameter) are evenly distributed on the upper part of the sludge discharge pipes 3. When the sludge and flocculent material 82 enter the sludge hopper 4, the drain valve is opened, and the sludge and flocculent material 82 can flow into the drain pipeline through the small holes on the sludge discharge pipes 3.

[0052] like Figure 7-8As shown, there are four outlet pipes 2, all located above the sludge discharge pipe 3. Each outlet pipe includes an outlet section 22 and two support sections 21 at either end of the outlet section 22. The two support sections 21 are symmetrically arranged, connecting the partition between the separation chamber 14 and the contact chamber 13, and the partition between the separation chamber 14 and the outlet cavity 5, thus supporting the outlet section 22 above the sludge discharge pipe 3. The outlet section is a hollow pipe with several outlet holes, through which water flows into the outlet cavity 5. The support section 21 consists of a horizontal section 211 and an inclined section 212. A sealing bearing 23 is installed at the connection between the horizontal section 211 and the partition, enabling the horizontal section 211 to rotate while effectively sealing the separation chamber 14 to prevent leakage. The inclined section 212 connects the horizontal section 211 and the effluent section 22. The inclined section 212 allows for the eccentricity of the effluent section 22. When the horizontal section 211 rotates, it drives the effluent section 22 to rotate around the axis of the horizontal section 211, thereby adjusting the height of the effluent section 22. The effluent section 22 can be adjusted according to the sludge sedimentation situation. For example, in the initial stage of wastewater treatment, when there is less sludge and flocculent material 82 at the bottom, the effluent section 22 can be adjusted to a lower position. As wastewater treatment progresses, the effluent section 22 can be appropriately raised, without affecting the treatment of the upper scum 81, while preventing the sludge and flocculent material 82 at the bottom from easily entering the effluent section 22, ensuring normal effluent discharge and effluent quality.

[0053] An adjustment assembly 7 is installed at one end of the outlet pipe 2 near the contact chamber 13 to drive the outlet pipe 2 to rotate. A receiving cavity 6 is provided on the partition between the separation chamber 14 and the contact chamber 13. The horizontal part 211 of one end of the outlet pipe 2 extends into the receiving cavity 6 and is connected to the adjustment assembly 7. The adjustment assembly 7 includes a motor 72, a drive shaft 71, and a transmission assembly. The drive shaft 71 extends into the receiving cavity 6 through the top plate and is connected to the four outlet pipes 2 through the transmission assembly. The drive shaft 71 extends upward to the top of the flotation tank. The motor 72 is driven by the drive shaft 71 to drive its rotation. A handwheel 73 can also be installed on the top of the drive shaft 71 for manual adjustment when necessary. The transmission assembly is a synchronous chain sprocket 74. After the drive shaft 71 is driven by any outlet pipe 2, the synchronous chain sprocket 74 can be used to achieve synchronous adjustment of the four outlet pipes 2, improving adjustment efficiency.

[0054] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A horizontal flow dissolved air flotation basin, comprising: The reaction chamber (12), the contact chamber (13) and the separation chamber (14) are characterized in that the separation chamber (14) is provided with a slag scraper (15) at the upper portion and a water outlet pipe (2) and a sludge discharge pipe (3) at the bottom portion. The power assembly is located between the guide plate (18) and the slag collecting groove (19) of the separation chamber (14) and has a total length smaller than the distance between the guide plate (18) and the slag collecting groove (19). The slag scraping plate (151) is provided on the power assembly and has a support portion (152) at the upper portion and a slag scraping portion (153) at the lower portion, the slag scraping portion (153) is detachably connected with the support portion (152), the slag scraping portion (153) is made of flexible material, and the slag scraping portion (153) is attached to the inlet inclined plate (191) of the slag collecting groove (19) when the slag scraping plate (151) runs to the slag collecting groove (19). The water outlet pipe (2) is arranged at the lower portion of the separation chamber (14) and is configured to be adjustable in height so as to adjust the distance between the water outlet pipe (2) and the sludge discharge pipe (3).

2. The horizontal flow flotation cell of claim 1 wherein, The separation chamber (14) is provided with a sludge falling hopper (4) at the bottom portion, and the sludge discharge pipe (3) is located at the bottom portion of the sludge falling hopper (4).

3. The horizontal flow flotation cell of claim 2 wherein, The water outlet pipe (2) comprises: a water outlet section (22) provided with a plurality of water outlet holes; a support section (21) arranged at both ends of the water outlet section (22) and rotatably connected with the side wall of the separation chamber (14); and an adjusting assembly (7) connected with the support section (21) close to the contact chamber (13) and used for driving the water outlet pipe (2) to rotate so as to adjust the height of the water outlet section (22).

4. The horizontal flow flotation cell of claim 3 wherein, The support section (21) comprises: a horizontal portion (211) rotatably connected with the side wall of the separation chamber (14) through a sealing bearing (23); and an inclined portion (212) connected with the horizontal portion (211) and the water outlet section (22) at both ends.

5. The horizontal flow flotation cell of claim 4 wherein, The adjusting assembly comprises: a driving shaft (71); a transmission assembly arranged on the horizontal portion (211) close to the contact chamber (13) and in transmission connection with the driving shaft (71), and adjacent two water outlet pipes (2) are in transmission connection at the horizontal portions (211) close to the contact chamber (13).

6. The horizontal flow flotation cell of claim 5 wherein, The separation chamber (14) and the contact chamber (13) are provided with a containing cavity (6) on the partition plate therebetween, and the transmission assembly is located in the containing cavity (6).

7. The horizontal flow flotation cell of claim 5 wherein, The driving shaft (71) extends upward to above the air flotation tank, and a hand wheel (73) is arranged at the top of the driving shaft (71).

8. The horizontal flow flotation cell of claim 5 wherein, The adjusting assembly further comprises: a driving member in transmission connection with the driving shaft (71) and used for driving the water outlet pipe (2) to rotate.

9. The horizontal flow flotation cell of claim 3 wherein, The sludge falling hopper (4) is in the shape of "W". The sludge discharge pipe (3) is out-of-plane perpendicular to the water outlet section (22), and a plurality of sludge discharge holes are arranged on the sludge discharge pipe (3).

10. The horizontal flow flotation cell of claim 3 wherein, The slag scraping portion (153) is made of rubber.

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