Biological aerated filter

Abstract

The utility model discloses a biological aerated filter which comprises a filter body, and a purification mechanism and an aeration component are arranged in the filter body; the outer side of the pool body is at least provided with a group of a first chamber and a second chamber which are positioned at different heights, and the bottom of the second chamber is communicated with the interior of the pool body through a flushing pipe, so that water flows through the liquid level difference between the second chamber and the first chamber to flush the purification mechanism. The first cavity and the second cavity which are located at different heights are formed in the tank body, the second cavity is communicated with the tank body through the flushing pipe, and liquid in the second cavity flows into the tank body after a control assembly on the flushing pipe is opened by means of the liquid level difference between the high-position second cavity and the tank body and between the high-position second cavity and the first cavity; and the filter material in the tank body is flushed, so that power-loss-free flushing is realized, and the problems of certain power loss and relatively high energy consumption due to the fact that external driving equipment is required for pressurizing water supply during existing backwashing are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter tanks, in particular to an aerated biological filter tank. Background Art

[0002] Aerated biological filter is a new type of biofilm wastewater treatment process. It cultivates microorganisms on the filter material and uses the metabolism of microorganisms to remove pollutants such as organic matter, ammonia nitrogen, and total nitrogen in the water. Its main process includes water intake, filtration, aeration backwash and other links, which serves the purpose of purifying water quality.

[0003] In the Chinese invention patent with publication number CN101244867B, entitled Downflow Double-layer Filter Media Aerated Biological Filter and Method for Treating Raw Water Using the Filter, a backwash water inlet pipe and an air inlet pipe are provided at the bottom of the tank body, and are connected to external water and air supply equipment. Water is driven externally from the backwash water pipe into the tank body and is discharged through the backwash water tank above, thereby achieving a flushing effect on the tank body. However, during backwashing, an external driving device is required to pressurize the water supply, which results in a certain power loss and is relatively energy-consuming. Utility Model Content

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide an aerated biological filter.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A biological aerated filter, comprising a tank body, a purification mechanism disposed within the tank body, an aeration assembly disposed within the purification mechanism, an input end of the aeration assembly extending through the tank body to the exterior, an inlet pipe and an outlet pipe respectively disposed on the exterior of the tank body, each communicating with the interior of the tank body; at least one set of first and second chambers located at different heights disposed on the exterior of the tank body, the first chamber communicating with the interior of the tank body via a first channel, and a drain pipe connected to the first chamber;

[0007] The second chamber is connected to the interior of the pool body through a second channel, and the second chamber is connected to the outside through a water outlet pipe. The bottom of the second chamber is connected to the inside of the pool body through a flushing pipe, and the connection point between the flushing pipe and the pool body is lower than the bottom of the purification mechanism. A control component is provided on the flushing pipe for opening and closing the flushing pipe;

[0008] The height of the first channel is lower than that of the second channel, so that the liquid level difference between the water flowing through the second chamber and the first chamber can have a flushing effect on the purification mechanism.

[0009] Furthermore, the side wall of the cell body is connected with an air inlet pipe, and the connection between the air inlet pipe and the cell body is lower than the bottom of the purification mechanism.

[0010] Furthermore, the connection point between the water inlet pipe and the pool body is lower than the bottom of the purification mechanism;

[0011] The water inlet pipe is equipped with a flocculant dosing device for adding chemicals into the pool body.

[0012] Furthermore, the purification mechanism includes a filter plate, which is installed inside the pool body and is located above the connection point between the air inlet pipe, water inlet pipe and flushing pipe and the pool body. A filter head is installed on the filter plate, and a purification layer assembly is provided above the filter plate for filtering and purifying sewage.

[0013] Furthermore, the purification layer assembly includes a pebble cushion layer, the pebble cushion layer is located on the top of the filter plate, and a biological filter material layer is provided on the top of the pebble cushion layer;

[0014] The part of the aeration assembly located inside the pool body is arranged in a pebble cushion layer.

[0015] Furthermore, the biological filter material layer is a short fiber filter material layer.

[0016] Furthermore, the aeration assembly includes an aeration pipe, which extends from the outside of the pool body to the inside of the pebble cushion layer. An aerator is provided on the part of the aeration pipe located in the pebble cushion layer.

[0017] Furthermore, the pool body is formed by combining four side walls and a bottom wall, and the four side walls of the pool body are respectively a first side wall, a second side wall, a third side wall and a fourth side wall;

[0018] The first chamber is formed by the second side wall of the cell body and a fifth side wall installed outside the cell body, the top of the fifth side wall is higher than the top of the second side wall, and the first channel is a channel formed by the height difference between the top of the fifth side wall and the top of the second side wall;

[0019] The second chamber is formed by the fourth side wall of the cell body and a sixth side wall installed outside the cell body, the top of the sixth side wall is higher than the top of the fourth side wall, and the second channel is a channel formed by the height difference between the top of the sixth side wall and the top of the fourth side wall;

[0020] The top of the fifth side wall is higher than the top of the fourth side wall, and the top of the fourth side wall is higher than the top of the second side wall.

[0021] Furthermore, the cross-sections of the sixth side wall and the fifth side wall are both L-shaped; the bottom of the fifth side wall is connected to the drain pipe;

[0022] The bottom of the inner side of the sixth side wall is connected with a baffle, the bottom of the sixth side wall is connected with a flushing pipe, the position where the flushing pipe is connected with the inner side of the sixth side wall is located between the pool body and the baffle, and the side of the sixth side wall is connected with the water outlet pipe.

[0023] Compared with the existing technology, the aerated biological filter has the following beneficial effects:

[0024] The utility model provides a first chamber and a second chamber located at different heights on the pool body, so that the second chamber is connected to the pool body through a flushing pipe, and utilizes the liquid level difference between the high-positioned second chamber and the pool body and the first chamber. After the control component on the flushing pipe is opened, the liquid in the second chamber flows into the pool body to flush the filter material in the pool body, realizing flushing without power loss, and solving the problem that the existing backwashing requires external driving equipment to pressurize water supply, which has certain power loss and is relatively energy-consuming. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the connection structure of the utility model;

[0026] Figure 2 It is a schematic diagram of a partial connection mechanism in the utility model.

[0027] In the figure: 1. Tank body; 2. Water inlet pipe; 3. Water outlet pipe; 4. First chamber; 5. Second chamber; 6. Drain pipe; 7. Flushing pipe; 8. Control assembly; 9. Air inlet pipe; 10. Filter plate; 11. Filter head; 12. Aerator; 13. Pebble cushion; 14. Biological filter material layer; 15. Baffle; 16. Flocculant dosing device; 17. Second side wall; 18. Fourth side wall; 19. Fifth side wall; 20. Sixth side wall; 21. Aeration pipe. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] like Figure 1-2As shown, the utility model provides a technical solution: an aerated biological filter, comprising a tank body 1, a purification mechanism is provided in the tank body 1, an aeration component is provided in the purification mechanism, and the input end of the aeration component extends through the tank body 1 to the outside, and an inlet pipe 2 and an outlet pipe 3 connected to the interior of the tank body 1 are respectively provided on the outside of the tank body 1; at least one group of first chambers 4 and second chambers 5 located at different heights are provided on the outside of the tank body 1, the first chamber 4 and the interior of the tank body 1 are connected through a first channel, and a drain pipe 6 is connected on the first chamber 4, the second chamber 5 and the interior of the tank body 1 are connected through a second channel, and the second chamber 5 is connected to the outside through the outlet pipe 3, the bottom of the second chamber 5 is connected to the tank body 1 through a flushing pipe 7, and the connection point between the flushing pipe 7 and the tank body 1 is lower than the bottom of the purification mechanism, and a control component 8 is provided on the flushing pipe 7 for opening and closing the flushing pipe 7; the height of the first channel is lower than the height of the second channel, so that the liquid level difference of water flowing through the second chamber 5 and the first chamber 4 has the effect of flushing the purification mechanism.

[0030] During use, the control component 8 can use an electromagnetic control valve to first close the flushing pipe 7 and the drain pipe 6, and then input the sewage to be treated through the water inlet pipe 2, so that the sewage enters from the bottom of the pool body 1, and then passes through the purification mechanism in turn for purification treatment. As the water inside the pool body 1 increases, the water flows into the first chamber 4 and the second chamber 5 in turn, and flushes the outlet pipe 3 on the second chamber 5 to be discharged. Then, when flushing, by closing the outlet pipe 3 and the water inlet pipe 2, the drain pipe 6 is opened to discharge the liquid in the pool body 1 and the first chamber 4. The liquid discharge level gradually decreases at any time. After the liquid level drops to an appropriate position, the flushing pipe 7 is opened. At this time, the liquid level is higher than the height of the pool body 1. Under the action of gravity, the liquid in the second chamber 5 flows into the bottom of the pool body 1 through the flushing pipe 7, and then flows upward through the purification mechanism, further discharging the water at the drain pipe 6, thereby flushing the purification mechanism.

[0031] The side wall of the pool body 1 is connected with an air inlet pipe 9, and the connection between the air inlet pipe 9 and the pool body 1 is lower than the bottom of the purification mechanism; when in use, one end of the air inlet pipe 9 is provided with an air supply device to the outside, and air is introduced through the air inlet pipe 9 for flushing.

[0032] The connection point between the water inlet pipe 2 and the tank body 1 is lower than the bottom of the purification mechanism; when in use, the sewage to be treated enters the lower side of the tank body 1 from the water inlet pipe 2, so that the sewage passes through the purification mechanism from bottom to top in sequence, overflows the first channel and the second channel, enters the second chamber 5, and is then discharged at the outlet pipe 3 on one side of the second chamber 5.

[0033] A flocculant dosing device 16 is installed on the water inlet pipe 2 for adding reagents to the tank body 1. When in use, flocculant is added through the flocculant dosing device 16, and the flocculant enters the tank body 1 along with the sewage from the water inlet pipe 2, further treating the sewage and improving its treatment effect.

[0034] The purification mechanism includes a filter plate 10, which is installed inside the pool body 1 and is located above the connection between the air inlet pipe 9, the water inlet pipe 2 and the flushing pipe 7 and the pool body 1. A filter head 11 is installed on the filter plate 10, and a purification layer component is provided above the filter plate 10 for filtering and purifying sewage. When in use, the filter plate 10 and the bottom of the pool body 1 form a water distribution and air distribution area to facilitate uniform flushing of the purification layer component in the pool body 1.

[0035] The purification layer assembly includes a pebble cushion layer 13, which is located on top of the filter plate 10. A biological filter material layer 14 is arranged on top of the pebble cushion layer 13. The part of the aeration assembly located inside the tank body 1 is arranged in the pebble cushion layer 13. The biological filter material layer 14 is a short fiber filter material layer, which is composed of polyester fiber and PE core. When in use, the filter material length is 40-45mm, the spherical PE core diameter is 4-4.5mm, the filter material porosity is 90-95%, and the specific surface area of a single filter material is 960mm. 2 , filter material specific gravity 1.05g / cm 3 The short fiber filter media layer is located above the aeration component. Compared with ceramic fillers, the short fiber surface is more likely to form a biofilm, which is beneficial to the purification of sewage. At the same time, the porosity of the short fiber is higher than that of the ceramic filler, and the specific gravity is slightly higher than that of water, so that the filter media can be completely dispersed during backwashing. The flushing intensity is controlled to keep the filter media in the best condition for a long time, stabilize the water output and increase the service life of the device.

[0036] The aeration assembly includes an aeration pipe 21, which extends from the outside of the pool body 1 to the inside of the pebble cushion layer 13. An aerator 12 is provided on the part of the aeration pipe 21 located on the pebble cushion layer 13; when in use, the aerator 12 adopts a tubular aerator 12, and a valve is provided on the first pipeline for opening and closing, and is connected to an external air supply device, and gas is input into the pool body 1 through the first pipeline and the aerator 12.

[0037] The pool body 1 is formed by a combination of four side walls and a bottom wall. The four side walls of the pool body 1 are respectively a first side wall, a second side wall 17, a third side wall and a fourth side wall 18; the first chamber 4 is formed by the second side wall 17 of the pool body 1 and a fifth side wall 19 installed on the outside of the pool body 1, the top of the fifth side wall 19 is higher than the top of the second side wall 17, and the first channel is a channel formed by the height difference between the top of the fifth side wall 19 and the top of the second side wall 17; the second chamber 5 is formed by the fourth side wall 18 of the pool body 1 and a sixth side wall 20 installed on the outside of the pool body 1, the top of the sixth side wall 20 is higher than the top of the fourth side wall 18, and the second channel is a channel formed by the height difference between the top of the sixth side wall 20 and the top of the fourth side wall 18; the top of the fifth side wall 19 is higher than the top of the fourth side wall 18, and the top of the fourth side wall 18 is higher than the top of the second side wall 17.

[0038] When in use, the first side wall and the third side wall are arranged oppositely, and the second side wall 17 and the fourth side wall 18 are arranged oppositely. The first side wall and the third side wall can also be arranged at different heights, and the corresponding fifth side wall 19 and the sixth side wall 20 are arranged on the outer side to form the corresponding first chamber 4 and the second chamber 5. When there is a height difference only on the side walls opposite to the second side wall 17 and the fourth side wall 18, the fifth side wall 19 and the sixth side wall 20 are the highest, and the first side wall and the third side wall correspond to the fifth side wall 19 and the sixth side wall 20 in height. When sewage is treated, the sewage enters the tank body 1 and passes through The purification mechanism first overflows over the second side wall 17, then enters the first chamber 4, and as the sewage enters, it continues to overflow over the fourth side wall 18 and enters the second chamber 5, and is finally discharged from the outlet pipe 3. During flushing, due to the height difference between the second side wall 17 and the fourth side wall 18, after the drain pipe 6 on the first chamber 4 is opened, the liquid level in the pool body 1 and the first chamber 4 gradually decreases. After it is lowered to an appropriate distance, the flushing pipe 7 is opened, so that the water in the second chamber 5 flows into the pool body 1 under the action of the height difference between the water level of the pool body 1 and the water level of the second chamber 5, thereby flushing the purification mechanism in the pool body 1.

[0039] The cross-sections of the sixth side wall 20 and the fifth side wall 19 are both L-shaped; the bottom of the fifth side wall 19 is connected to the drain pipe 6; the bottom of the inner side of the sixth side wall 20 is connected to the baffle 15, and the bottom of the sixth side wall 20 is connected to the flushing pipe 7. The position where the flushing pipe 7 is connected to the inner side of the sixth side wall 20 is located between the pool body 1 and the baffle 15, and the side of the sixth side wall 20 is connected to the outlet pipe 3; when in use, when treating sewage, the sewage treated by the purification mechanism enters the inner side of the sixth side wall 20, then first overflows the baffle 15, and then is discharged through the outlet pipe 3, which has the effect of blocking suspended matter.

Claims

1. A biological aerated filter, comprising a tank body (1), a purification mechanism provided in the tank body (1), an aeration assembly provided in the purification mechanism, an input end of the aeration assembly extending through the tank body (1) to the outside, an inlet pipe (2) and an outlet pipe (3) communicating with the interior of the tank body (1) provided on the outside of the tank body (1), respectively; characterized in that: At least one first chamber (4) and a second chamber (5) located at different heights are provided on the outside of the pool body (1); the first chamber (4) and the interior of the pool body (1) are connected via a first channel, and a drainage pipe (6) is connected to the first chamber (4); The second chamber (5) is connected to the interior of the pool body (1) through a second channel, and the second chamber (5) is connected to the outside through a water outlet pipe (3). The bottom of the second chamber (5) is connected to the interior of the pool body (1) through a flushing pipe (7), and the connection point between the flushing pipe (7) and the pool body (1) is lower than the bottom of the purification mechanism. A control component (8) is provided on the flushing pipe (7) for opening and closing the flushing pipe (7); The height of the first channel is lower than that of the second channel, so that the difference in liquid level between the second chamber (5) and the first chamber (4) caused by the water flowing through the first chamber (4) can have a flushing effect on the purification mechanism.

2. The biological aerated filter according to claim 1, characterized in that: The side wall of the pool body (1) is connected to an air inlet pipe (9), and the connection between the air inlet pipe (9) and the pool body (1) is lower than the bottom of the purification mechanism.

3. The biological aerated filter according to claim 1, characterized in that: The connection point between the water inlet pipe (2) and the tank body (1) is lower than the bottom of the purification mechanism; The water inlet pipe (2) is provided with a flocculant dosing device (16) for adding a flocculant into the tank body (1).

4. The biological aerated filter according to claim 2, characterized in that: The purification mechanism comprises a filter plate (10), the filter plate (10) being installed inside the tank body (1), and the filter plate (10) being located above the connection point between the air inlet pipe (9), the water inlet pipe (2) and the flushing pipe (7) and the tank body (1), a filter head (11) being installed on the filter plate (10), and a purification layer assembly being provided above the filter plate (10) for filtering and purifying sewage.

5. The biological aerated filter according to claim 4, characterized in that: The purification layer assembly comprises a pebble cushion layer (13), the pebble cushion layer (13) is located on the top of the filter plate (10), and a biological filter material layer (14) is provided on the top of the pebble cushion layer (13); The part of the aeration assembly located inside the tank body (1) is arranged in a pebble cushion layer (13).

6. The biological aerated filter according to claim 5, characterized in that: The biological filter material layer (14) is a short fiber filter material layer.

7. The biological aerated filter according to claim 5, characterized in that: The aeration assembly comprises an aeration pipe (21), the aeration pipe (21) extending from the outside of the tank body (1) to the inside of the pebble cushion (13), and an aerator (12) is provided on the portion of the aeration pipe (21) located inside the pebble cushion (13).

8. The biological aerated filter according to claim 1, characterized in that: The pool body (1) is formed by combining four side walls and a bottom wall, and the four side walls of the pool body (1) are respectively a first side wall, a second side wall (17), a third side wall and a fourth side wall (18); The first chamber (4) is formed by the second side wall (17) of the cell body (1) and a fifth side wall (19) installed outside the cell body (1), the top of the fifth side wall (19) is higher than the top of the second side wall (17), and the first channel is a channel formed by the height difference between the top of the fifth side wall (19) and the top of the second side wall (17); The second chamber (5) is formed by a fourth side wall (18) of the cell body (1) and a sixth side wall (20) installed outside the cell body (1), the top of the sixth side wall (20) is higher than the top of the fourth side wall (18), and the second channel is a channel formed by the height difference between the top of the sixth side wall (20) and the top of the fourth side wall (18); The top of the fifth side wall (19) is higher than the top of the fourth side wall (18), and the top of the fourth side wall (18) is higher than the top of the second side wall (17).

9. The biological aerated filter according to claim 8, characterized in that: The cross-sections of the sixth side wall (20) and the fifth side wall (19) are both L-shaped; the bottom of the fifth side wall (19) is connected to the drain pipe (6); The bottom of the inner side of the sixth side wall (20) is connected to a baffle (15), the bottom of the sixth side wall (20) is connected to a flushing pipe (7), the position where the flushing pipe (7) is connected to the inner side of the sixth side wall (20) is located between the pool body (1) and the baffle (15), and the side of the sixth side wall (20) is connected to the water outlet pipe (3).

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