Biological aerated filter

Abstract

The utility model provides a biological aerated filter, aiming at solving the technical problem that the existing filter material intercepting device can intercept foam with higher pollutant concentration. The biological aerated filter comprises a filter main body, wherein a linear partition wall is arranged on one side of the filter main body; one section of the drainage channel is arranged along the side part of the filter main body and shares a partition wall with the filter main body; the slag blocking plate covers the section, connected with the filter tank main body, of the drainage channel, and one side of the slag blocking plate is positioned above the filter tank main body; and a plurality of filter holes are formed in the slag blocking plate. One side of the filter tank main body is provided with a linear partition wall, and the other side of the partition wall is provided with a drainage channel, so that backwashed water can enter the drainage channel. Besides, the slag blocking plate is arranged on the partition wall between the filter tank main body and the drainage channel, the foam is broken through the slag blocking plate, high-concentration pollutants are released from the foam and flow onto the slag blocking plate along with water flow, and the high-concentration pollutants are separated from water under the action of the filter holes in the slag blocking plate.

Description

Technical Field

[0001] The utility model relates to a filter tank structure, in particular to an aerated biological filter tank. Background Art

[0002] Aerated biological filter has many advantages such as short hydraulic retention time, easy film formation, high volumetric load, small footprint, high treatment efficiency, strong resistance to shock loads, and elimination of secondary sedimentation tanks. It can stably and effectively solve the problem of excessive TN, ammonia nitrogen and SS in sewage.

[0003] As filtered suspended matter and biofilm accumulate between the filter layers, the water resistance of the filter layer gradually increases. Although the water turbidity will not change significantly at this time, if backwashing is not carried out promptly, the excessive accumulation of sludge will cause changes in the filter layer structure, altering the cross-section and shape of the filter media, and compacting the filter layer. At the same time, the increased water resistance can also cause the filter layer to "rupture," resulting in a short circuit in the filtered water and poor water quality.

[0004] The backwash process will carry the filter media away with the backwash wastewater. However, today's filter media interception devices cannot completely intercept the filter media. In addition, when intercepting, they also intercept the foam with a high concentration of pollutants generated during the backwash process, causing pollutants to be discharged with the foam during normal operation, affecting the water quality of the effluent. Utility Model Content

[0005] In view of the technical problem that the current filter material interception device will intercept foam with high pollutant concentration, the utility model provides an aerated biological filter, which has the advantage of being able to puncture the foam and intercept the pollutants.

[0006] The technical solution of the utility model is:

[0007] A biological aerated filter, comprising:

[0008] The main body of the filter tank has a straight partition wall on one side;

[0009] A drainage channel, one section of which is arranged along the side of the filter tank body and shares a partition wall with the filter tank body;

[0010] The slag plate covers the section where the drainage channel connects to the filter tank body, with one side located above the filter tank body and its length being greater than or equal to the strength of the partition wall;

[0011] The slag blocking plate is provided with a plurality of filter holes.

[0012] Optionally, a section of the slag retaining plate located above the filter tank body has a plurality of spikes.

[0013] Optionally, the spikes are triangular in structure, and all the spikes are arranged side by side on the side of the slag blocking plate, with one corner of two adjacent spikes abutting against each other.

[0014] Optionally, the filter holes are diamond-shaped.

[0015] Optionally, a plurality of filter holes are arranged side by side in the same direction, and two adjacent rows of filter holes are staggered.

[0016] Optionally, the area of ​​all filter holes is greater than 30% of the area of ​​the slag retaining plate.

[0017] Optionally, the slag retaining plate is rotatably connected to the top of the partition wall.

[0018] Optionally, a support base is provided on a side of the drainage channel away from the partition wall, and the support base and the top of the partition wall are located on the same horizontal plane.

[0019] Optionally, a handle is provided on the top of the slag retaining plate away from the partition wall.

[0020] Optionally, a support member is rotatably provided on a side of the drainage channel away from the partition wall, and the top end of the support member can abut against the bottom surface of the slag retaining plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] A straight partition wall is set on one side of the filter body, and a drainage channel is set on the other side of the partition wall so that the water after backwashing can enter the drainage channel.

[0023] In addition, a slag retaining plate is installed on the partition wall between the filter tank body and the drainage channel. The foam is broken by the slag retaining plate, allowing high-concentration pollutants to be released from the foam and flow to the slag retaining plate with the water flow. Under the action of the filter holes on the slag retaining plate, the high-concentration pollutants are separated from the water.

[0024] This technical solution can break the foam and intercept pollutants. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 It is a structural diagram of the utility model;

[0027] Figure 2 This is a schematic diagram of a usage state of the utility model;

[0028] Figure 3 Schematic diagram of the structure of the slag retaining plate. DETAILED DESCRIPTION

[0029] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0031] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] Example

[0034] See also Figure 1 、 Figure 2 and Figure 3 This embodiment discloses a biological aerated filter, comprising a filter body 10, a drainage channel 20, and a slag retaining plate 30. Various filtration fillers, such as ceramsite and quartz sand, are disposed within the filter body 10. Within the filter body 10, sewage comes into contact with the interstitial spaces between the microbial membranes growing on the surface of the fillers, thereby purifying the sewage.

[0035] The filter body 10 is generally rectangular in structure. One side of the filter body 10 is defined by a linear partition wall 40, which can be cast concrete or made of metal materials such as stainless steel. A drainage channel 20 is provided on the side of the filter body 10, with a section of the drainage channel 20 sharing the partition wall 40 with the filter body 10. This creates a separation between the filter body 10 on one side and the drainage channel 20 on the other.

[0036] The slag retaining plate 30 is disposed on the drain channel 20 and completely covers a section of the partition wall 40 shared by the drain channel 20 and the filter tank body 10, such that the length of the slag retaining plate 30 is greater than the length of the partition wall 40. Furthermore, one side of the slag retaining plate 30 is located above the filter tank body 10, and the portion of the slag retaining plate 30 covering the drain channel 20 has a plurality of closely spaced filter holes 31.

[0037] In this technical solution, a linear partition wall 40 is provided on one side of the filter tank body 10 , and a drainage channel 20 is provided on the other side of the partition wall 40 so that the water after backwashing can enter the drainage channel 20 .

[0038] In addition, a slag retaining plate 30 is provided on the partition wall 40 between the filter tank body 10 and the drainage channel 20. The slag retaining plate 30 breaks the foam, allowing high-concentration pollutants to be released from the foam and flow to the slag retaining plate 30 along with the water flow. Under the action of the filter holes 31 on the slag retaining plate 30, the high-concentration pollutants are separated from the water.

[0039] This technical solution can break the foam and intercept pollutants.

[0040] In a preferred technical solution, a plurality of spikes 32 are provided on one side of the slag retaining plate 30, and all the spikes 32 are located above the filter tank body 10. By designing the spikes 32, the foam can be directly punctured, so that the high-concentration pollutants inside it can be released from the foam.

[0041] Generally, the spikes 32 are triangular in structure and are all arranged side by side on the side of the slag blocking plate 30. At the same time, one corner of two adjacent spikes 32 abuts together. By densely arranging the spikes 32, all foam can be effectively punctured to avoid the problem of foam accumulation in some positions.

[0042] In one specific embodiment:

[0043] like Figure 3As shown, the filter holes 31 have a diamond-shaped structure. During the backwash process, the filter material carried away is a spherical granular structure. If the filter holes 31 are designed as a circular structure, the area of ​​the filter holes 31 will be small. By designing the filter holes 31 as a diamond-shaped structure, the area of ​​the filter holes 31 can be increased while ensuring that the filter material is intercepted, thereby increasing the amount of water passing through the filter holes 31 per unit time.

[0044] In one specific embodiment, the filter media used in the filter tank body 10 typically has a diameter of approximately 3 mm to 5 mm, while the diagonals of the diamond-shaped filter holes 31 are 3.5 mm and 4.5 mm, respectively. Based on this, the area of ​​the diamond-shaped filter holes 31 is 7.875 mm². If circular filter holes 31 were used, their diameter would have to be less than 3 mm to ensure that the filter media is retained by the slag retaining plate 30. Therefore, the maximum area of ​​the circular filter holes 31 is 7.065 mm².

[0045] In addition, since the filter holes 31 may be blocked by the filter material during the filtering process, the circular filter holes 31 will be almost completely blocked, so it is more appropriate to use polygonal filter holes 31.

[0046] If the filter holes 31 are designed as squares, the maximum area of ​​the square should be less than or equal to 9 mm², while the area occupied by the filter material is 7.0685 mm². In this case, the water flow area of ​​the filter holes 31 is approximately 1.9315 mm². If the filter holes 31 are diamond-shaped, the maximum diagonal dimensions can reach 3.8 mm and 4.9 mm, respectively. In this case, the maximum area of ​​the diamond-shaped filter holes 31 is 9.2857 mm². Relatively speaking, for a given filter material size, the water flow area of ​​the diamond-shaped filter holes 31 is 0.2857 mm² larger than that of the square filter holes 31.

[0047] The use of the two diamond-shaped filter holes 31 with diagonal sizes of 3.5 mm and 4.5 mm can ensure that all filter materials are intercepted on the slag retaining plate 30, has good structural stability, and can maximize the water flow area.

[0048] In one preferred embodiment, multiple filter holes 31 are arranged side by side along the same straight line, with adjacent rows of filter holes 31 staggered. This design allows for more filter holes 31 to be distributed across the slag barrier 30. To maximize water flow, the area of ​​all filter holes 31 should be greater than 30% of the area of ​​the slag barrier 30.

[0049] In another specific embodiment:

[0050] The slag retaining plate 30 is rotatably connected to the top of the partition wall 40 so that a portion of the slag retaining plate 30 located above the drainage channel 20 can be rotated upward, thereby pouring the filter material connected to the slag retaining plate 30 back into the filter tank body 10.

[0051] Preferably, a support base 21 is provided on the side of the drain 20 away from the partition wall 40, and the support base 21 is located at the same horizontal plane as the top of the partition wall 40. When the slag retaining plate 30 is normally working to retain filter material, the slag retaining plate 30 is installed on the drain 20 through the support base 21.

[0052] In addition, a handle 33 is provided on the top of the slag retaining plate 30 so as to pull the slag retaining plate 30 to rotate. In order to save effort, the handle 33 is designed on a side of the slag retaining plate 30 away from the filter tank main body 10.

[0053] In another specific embodiment:

[0054] A support member (not shown in the figure) is rotatably provided on the side of the drainage channel 20 away from the partition wall 40. When the slag blocking plate 30 rotates and rises to a certain angle, the top end of the support member can abut against the bottom surface of the slag blocking plate 30, so that the slag blocking plate 30 maintains a certain tilt angle, which is conducive to cleaning the top surface of the slag blocking plate 30.

[0055] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A biological aerated filter, characterized in that: include: The main body of the filter tank has a straight partition wall on one side; A drainage channel, one section of which is arranged along the side of the filter tank body and shares a partition wall with the filter tank body; The slag plate covers the section where the drainage channel connects to the filter tank body, with one side located above the filter tank body and its length being greater than or equal to the strength of the partition wall; The slag blocking plate is provided with a plurality of filter holes.

2. The biological aerated filter according to claim 1, characterized in that The slag retaining plate is provided with a plurality of spikes on a section above the filter tank body.

3. The biological aerated filter according to claim 2, characterized in that: The spikes are triangular in structure, and all the spikes are arranged side by side on the side of the slag blocking plate, with one corner of two adjacent spikes abutting against each other.

4. The biological aerated filter according to claim 2, characterized in that: The filter holes are diamond-shaped.

5. The biological aerated filter according to claim 4, characterized in that: A plurality of filter holes are arranged side by side in the same direction, and two adjacent rows of filter holes are staggered.

6. The biological aerated filter according to any one of claims 1 to 5, characterized in that: The area of ​​all filter holes is greater than 30% of the area of ​​the slag plate.

7. The biological aerated filter according to claim 6, characterized in that: The slag retaining plate is rotatably connected to the top of the partition wall.

8. The biological aerated filter according to claim 7, characterized in that: A support base is provided on the side of the drainage channel away from the partition wall, and the support base and the top of the partition wall are located on the same horizontal plane.

9. The biological aerated filter according to claim 7, characterized in that: A handle is provided on the top of the slag retaining plate away from the partition wall. The handle can be lifted to return the intercepted filter material to the filter tank.

10. The biological aerated filter according to claim 7, characterized in that: A support member is rotatably provided on one side of the drainage channel away from the partition wall, and the top end of the support member can abut against the bottom surface of the slag blocking plate.

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