Wastewater treatment device integrating air floatation and filtration

Abstract

The utility model discloses a wastewater treatment device integrating air floatation and filtration, which relates to the field of wastewater treatment, and comprises a circular water tank, the water tank comprises an air floatation reaction tank at the top and a filter tank at the bottom, the air flotation reaction tank comprises an air flotation reaction area, an air flotation contact area, an air flotation release area and a separation area, a water outlet and a backwashing opening are formed in one side of the bottom of the filter tank, and the filter tank comprises a water distributor, a filter layer and a clear water area. The wastewater treatment pool is designed into a circular structure, and the air flotation reaction pool and the filter pool are designed up and down, so that the occupied area can be effectively reduced, and the wastewater treatment pool is easier to arrange and mount compared with a square pool; moreover, each part of the round pool is uniformly stressed, so that the water pressure bearing capacity in the pool is improved, and the pool can better adapt to water level changes; meanwhile, the water pool with the circular structure enables water flow distribution to be more uniform, water flow dead angles are reduced, and the treatment effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a wastewater treatment device that integrates air flotation filtration. Background Technology

[0002] Air flotation technology is widely used in water treatment and wastewater treatment, mainly for removing suspended solids, grease and other pollutants. This technology introduces microbubbles into the water and uses the upward force of the bubbles to combine suspended solids and bubbles to form scum, thereby achieving solid-liquid separation.

[0003] In many water treatment processes, flotation and filtration technologies are often used in combination to achieve higher treatment efficiency. For example, in treating oily industrial wastewater, flotation can first remove most of the suspended solids and grease, followed by filtration technology to further remove fine particles and other pollutants. This combination is currently the most common process in wastewater treatment systems.

[0004] Currently, with my country placing increasing emphasis on environmental protection requirements, most existing enterprises need to upgrade their standards or transform their production processes. Changes in wastewater quality necessitate upgrades to wastewater treatment processes.

[0005] However, equipment that combines flotation and filtration technologies is bulky and requires a lot of land space. For some small and medium-sized enterprises, the wastewater treatment area of ​​these enterprises is limited. In order to meet environmental protection requirements, the traditional process equipment cannot meet the needs of these enterprises. Therefore, there is an urgent need to develop a piece of equipment that has a small footprint and meets the requirements of combining flotation and filtration technologies. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a wastewater treatment device that integrates air flotation filtration to solve the problems existing in the background art.

[0007] This utility model provides the following technical solution: a wastewater treatment device integrating air flotation and filtration, comprising a circular water tank, which includes an air flotation reaction tank at the top and a filtration tank at the bottom. The air flotation reaction tank includes an air flotation reaction zone located on the outside of the water tank, and a central cylinder located in the middle of the air flotation reaction tank. The central cylinder has an air flotation contact zone and an air flotation release zone inside, and a separation zone is located between the central cylinder and the air flotation reaction tank. The filtration tank is located at the bottom of the separation zone, and an outlet and a backwash port are provided on one side of the bottom of the filtration tank.

[0008] Preferably, an annular water collection pipe is provided in the separation zone, which is used to collect water in the separation zone and transport it to the filtration tank.

[0009] Preferably, the filter tank includes a water distributor in the upper layer, a filter layer in the middle layer, and a clear water zone in the lower layer. Water in the separation zone passes through the water distributor and then through the filter layer by gravity to reach the clear water zone. The water outlet and backwash outlet are located at the bottom of one side of the clear water zone.

[0010] Preferably, the top of the water distributor is connected to a pipe, the top of which extends to the partition between the air flotation reaction tank and the filtration tank, and one end of the pipe is connected to an inlet pipe, which is connected to an annular water collection pipe.

[0011] Preferably, the backwash port is inserted into the backwash pipe, and an air wash port is provided at the bottom of the other side of the clean water zone, and the air wash port is connected to the backwash pipe.

[0012] Preferably, an upper level gauge is provided at the top of one side of the filter tank, and a lower level gauge is provided at the bottom of one side of the filter tank.

[0013] Preferably, the filter layer is a sand filter.

[0014] Preferably, the air flotation contact area is located above the central cylinder, and the air flotation release area is located below the central cylinder.

[0015] Preferably, the water in the air flotation reaction zone is introduced into the air flotation contact zone via a dissolved air pump, and then enters the separation zone outside the central cylinder via the air flotation release zone.

[0016] Preferably, a manhole is provided in the middle of one side of the filter tank, and a discharge hole is provided at the bottom of one side of the filter tank.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model designs the wastewater treatment tank as a circular structure, and integrates the air flotation reaction tank and the filtration tank vertically, which can effectively reduce the floor space occupied and is easier to lay out and install compared to a square tank; in addition, the circular structure of the tank distributes the stress evenly throughout, improves the water pressure bearing capacity inside the tank, and can better adapt to water level changes; at the same time, the circular structure of the tank makes the water flow distribution more uniform, reduces dead zones, and improves the treatment effect.

[0019] 2. This utility model has a water distributor installed at the top of the filter layer. The water distributor distributes water evenly, so that the wastewater to be treated enters the filter layer uniformly and stably, preventing large fluctuations in the influent water, which would affect the microbial treatment effect.

[0020] 3. This utility model adopts a combination of water washing and air washing in the backwashing structure. By coordinating the backwashing and air washing, the backwashing effect is improved. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the cross-sectional structure of the water tank of this utility model.

[0022] Figure 2 This is a top view of the water tank structure of this utility model.

[0023] The attached figures are labeled as follows:

[0024] 100. Pool;

[0025] 1. Air flotation reactor; 11. Air flotation reaction zone; 12. Central cylinder; 121. Air flotation contact zone; 122. Air flotation release zone; 13. Separation zone; 131. Circular water collection pipe;

[0026] 2. Filter tank; 21. Outlet; 22. Backwash port; 23. Water distributor; 231. Pipe; 232. Inlet pipe; 24. Filter layer; 25. Clear water zone; 26. Backwash pipe; 27. Air wash port; 28. Upper level gauge; 29. ​​Lower level gauge; 210. Manhole; 211. Discharge port. Detailed Implementation

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0028] This utility model provides a wastewater treatment device that integrates air flotation filtration, such as... Figure 1-2 As shown, a circular water tank 100 includes an air flotation reaction tank 1 at the top and a filtration tank 2 at the bottom, with a partition between the air flotation reaction tank 1 and the filtration tank 2.

[0029] The circular design of the water tank 100, with the air flotation reaction tank 1 and the filtration tank 2 arranged vertically, effectively reduces the floor space required and is easier to lay out and install compared to a square tank. Furthermore, the circular structure of the water tank 100 ensures uniform stress distribution throughout, increasing its internal water pressure bearing capacity and allowing it to better adapt to water level changes. Simultaneously, the circular structure of the water tank 100 results in more even water flow distribution, reducing dead zones and improving treatment efficiency.

[0030] In this embodiment, the flotation reaction tank 1 includes a flotation reaction zone 11 disposed outside the water tank 100, and a central cylinder 12 disposed in its middle. The central cylinder 12 contains a flotation contact zone 121 and a flotation release zone 122. Specifically, the flotation contact zone 121 is located above the central cylinder 12, and the flotation release zone 122 is located below the central cylinder 12.

[0031] In this embodiment, the area between the outer side of the central cylinder 12 and the air flotation reaction tank 1 is a separation zone 13. An annular water collection pipe 131 is installed within the separation zone 13 to collect water from the separation zone 13 and transport it to the interior of the filtration tank 2. Specifically, water from the air flotation reaction zone 11 is introduced into the air flotation contact zone 121 via a dissolved air pump, and then enters the separation zone 13 outside the central cylinder 12 via the air flotation release zone 122.

[0032] Wastewater first enters the air flotation reaction zone 11. Coagulants and flocculants are added in the air flotation reaction zone 11 to treat the wastewater by coagulation and flocculation. After treatment, the wastewater is connected to the air flotation contact zone 121 by a dissolved air pump. The wastewater then enters the separation zone 13 outside the central cylinder 12 through the air flotation release zone 122. The effluent from the separation zone 13 is collected by the annular water collection pipe 131 and enters the lower filter tank 2.

[0033] In this embodiment, the filter tank 2 is located at the bottom of the separation zone 13, and an outlet 21 and a backwash port 22 are provided on one side of the bottom of the filter tank 2.

[0034] In this embodiment, the filter tank 2 includes an upper water distributor 23, a middle filter layer 24, and a bottom clear water zone 25. Specifically, the filter layer 24 is a sand filter. Water from the separation zone 13 passes through the water distributor 23 and then through the filter layer 24 by gravity to reach the clear water zone 25. The outlet 21 and the backwash port 22 are located at the bottom of one side of the clear water zone 25.

[0035] Wastewater treated from the flotation reactor 1 passes through the water distributor 23. The water distributor 23 distributes water evenly, ensuring that the wastewater enters the filter layer 24 in a uniform and stable manner, preventing large fluctuations in the influent water that could affect the microbial treatment effect. The wastewater is then filtered through the sand filter layer. The sand filter uses natural quartz sand, usually along with manganese sand and anthracite, as filter media to separate insoluble substances in the water. The wastewater then permeates into the clear water zone 25.

[0036] Furthermore, the top of the water distributor 23 is connected to a pipe 231, the top of which extends to the partition between the flotation reaction tank 1 and the filtration tank 2. One end of the pipe 231 is connected to an inlet pipe 232, which is connected to an annular water collection pipe 131. All the wastewater from the flotation reaction tank 1 flows into the inlet pipe 232 through the annular water collection pipe 131 and then into the pipe 231, so that all the wastewater after flotation treatment passes through the water distributor 23, thereby improving the stability and uniformity of water distribution.

[0037] Furthermore, the backwash port 22 is inserted into the backwash pipe 26, and an air wash port 27 is provided at the bottom of the other side of the clear water zone 25. The air wash port 27 is connected to the backwash pipe 26, and the backwash pipe 26 can be connected to a backwash pump to remove impurities trapped in the filter media layer, so that the filter can restore its filtration capacity in a short time. At the same time, an air wash port 27 is provided at the other end of the backwash pipe 26. The combination of air washing and backwashing improves the backwashing effect. It can be noted that a sand filter backwash drain is provided above the filter layer 24.

[0038] Furthermore, an upper level gauge 28 is installed at the top of one side of the filter tank 2, and a lower level gauge 29 is installed at the bottom of one side of the filter tank 2, for monitoring the water level in the filter tank 2.

[0039] In this embodiment, a manhole 210 is provided in the middle of one side of the filter pool 2 for workers to enter the water pool 100 for inspection and maintenance, and a discharge hole 211 is provided at the bottom of one side of the filter pool 2 for emptying the water pool 100 or cleaning sludge and sediment.

[0040] The working principle of this utility model is as follows: Wastewater first passes through the air flotation reaction zone 11. After coagulation and flocculation reactions, the wastewater is introduced into the air flotation contact zone 121 by a dissolved air pump. The wastewater passes through the air flotation release zone 122 and enters the separation zone 13 outside the central cylinder 12. The separation zone 13 collects the water through the annular water collection pipe 131 and enters the lower filter tank 2. After passing through the water distributor 23, the upper layer of the filter tank 2 passes through the filter layer 24 by gravity and then enters the lower clear water zone 25. Finally, the treated water flows out from the lower outlet 21.

[0041] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0042] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.

Claims

1. A wastewater treatment device integrated with gas collection and floatation filtration, characterized in that, The system includes a circular water tank (100), which includes an air flotation reaction tank (1) at the top and a filter tank (2) at the bottom. The air flotation reaction tank (1) includes an air flotation reaction zone (11) located outside the water tank (100). The air flotation reaction tank (1) also includes a central cylinder (12) located in its middle. The central cylinder (12) has an air flotation contact zone (121) and an air flotation release zone (122) inside. There is a separation zone (13) between the central cylinder (12) and the air flotation reaction tank (1). The filter tank (2) is located at the bottom of the separation zone (13). The bottom side of the filter tank (2) is provided with an outlet (21) and a backwash port (22).

2. The waste water treatment device of claim 1, wherein: The separation zone (13) is equipped with an annular water collection pipe (131), which is used to collect water in the separation zone (13) and transport it to the filter tank (2).

3. The waste water treatment device of claim 1, wherein the waste water treatment device is characterized by: The filter tank (2) includes a water distributor (23) in the upper layer, a filter layer (24) in the middle layer, and a clear water zone (25) in the bottom layer. Water from the separation zone (13) passes through the water distributor (23) and then passes through the filter layer (24) by gravity to reach the clear water zone (25). The outlet (21) and backwash port (22) are located at the bottom of one side of the clear water zone (25).

4. The wastewater treatment device integrating air flotation filtration according to claim 3, characterized in that: The top of the water distributor (23) is connected to a pipe (231), the top of which extends to the separation position between the air flotation reaction tank (1) and the filter tank (2). One end of the pipe (231) is connected to an inlet pipe (232), which is connected to an annular water collection pipe (131).

5. The integrated gas collecting and floatation filtering wastewater treatment device according to claim 1, characterized in that: The backwash port (22) is inserted into the backwash pipe (26), and the bottom of the other side of the clean water zone (25) is provided with an air wash port (27), which is connected to the backwash pipe (26).

6. The integrated gas collecting and floatation filtering wastewater treatment device according to claim 1, characterized in that: An upper level gauge (28) is installed on the top side of the filter tank (2), and a lower level gauge (29) is installed on the bottom side of the filter tank (2).

7. The integrated gas collecting and floatation filtering wastewater treatment device according to claim 3, characterized in that: The filter layer (24) is a sand filter.

8. The integrated gas collecting and floatation filtering wastewater treatment device according to claim 1, characterized in that: The air flotation contact area (121) is located above the central cylinder (12), and the air flotation release area (122) is located below the central cylinder (12).

9. The integrated gas collecting and floatation filtration wastewater treatment device according to claim 1, characterized in that: The water in the air flotation reaction zone (11) is introduced into the air flotation contact zone (121) through the dissolved air pump, and then enters the separation zone (13) outside the central cylinder (12) through the air flotation release zone (122).

10. The integrated gas collecting and floatation filtration wastewater treatment device according to claim 1, characterized in that: A manhole (210) is provided in the middle of one side of the filter pool (2), and a discharge hole (211) is provided at the bottom of one side of the filter pool (2).

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