Self-cleaning type biological rotating disc sewage treatment equipment

Abstract

The utility model relates to the technical field of biological rotating disc sewage treatment, in particular to self-cleaning type biological rotating disc sewage treatment equipment which comprises a biochemical tank, a rotating disc device and a driving device, the biochemical tank is provided with a water inlet and a water outlet, the rotating disc device is arranged in the biochemical tank, and the rotating disc device comprises a rotating shaft and a plurality of discs arranged on the rotating shaft. The driving device is connected with the rotating shaft, the cleaning device comprises a supporting assembly and an elution assembly, the elution assembly is arranged corresponding to the interval space, the supporting assembly is used for driving the elution assembly to extend into the interval space, and the elution assembly comprises a first pressurizing baffle; therefore, the water flow in the interval space is pressurized and accelerated. The elution assembly is driven by the supporting assembly to extend into the interval space between the adjacent discs, so that the water flow in the interval space is pressurized and accelerated, the shearing force of the water flow on the biological membrane on the discs is improved, and the biological membrane is promoted to be separated from the discs.

Description

Technical Field

[0001] This utility model relates to the field of biological rotating disc wastewater treatment technology, specifically to a self-cleaning biological rotating disc wastewater treatment device. Background Technology

[0002] As the biological rotating disc rotates, wastewater flows through the gaps between the discs in the reaction tank. Organic matter in the wastewater is adsorbed by the biofilm on the discs. When the discs leave the water surface, a thin film of wastewater forms on the disc surface. Oxygen from the air continuously dissolves into this film, and the microorganisms in the biofilm absorb the dissolved oxygen, oxidizing and decomposing the adsorbed organic pollutants. Each rotation of the disc completes one cycle of adsorption-oxygen absorption-oxidation decomposition. As the disc continues to rotate, pollutants are continuously oxidized and decomposed, and the biofilm gradually thickens.

[0003] If the biofilm thickness is moderate and the effluent quality is stable, the biofilm can shed naturally without human intervention. However, if the biofilm is too thick, blockages may occur in the disc pores or between the disc plates, affecting water flow distribution and oxygen transfer, leading to a decrease in effluent quality. In such cases, external intervention is needed to clean the aging biofilm. Currently, the existing cleaning methods generally involve shutting down the biological disc for cleaning. For example, after shutdown, high-pressure water jets can be used for rinsing, mechanical brushing, or the disc can be idled to remove the aging biofilm through centrifugal force. However, this requires dedicated shutdown cleaning, which is too cumbersome and necessitates pausing the normal operation of the biological disc, resulting in high economic costs. Utility Model Content

[0004] The purpose of this invention is to provide a solution that solves the problem of needing to stop the machine to clean excessively thick biofilms. By using a support component to drive the washing component to extend into the space between adjacent discs, the water flow in the space is pressurized and accelerated, thereby increasing the shear force of the water flow on the biofilm on the discs and causing the biofilm to detach from the discs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a self-cleaning biological rotating disc wastewater treatment device, comprising a biological tank, a rotating disc device, and a driving device. The biological tank has an inlet and an outlet. The rotating disc device is disposed within the biological tank and includes a rotating shaft and multiple discs disposed on the rotating shaft, with a space between adjacent discs. The driving device is connected to the rotating shaft and also includes a cleaning device. The cleaning device includes a support component and a washing component. The washing component is disposed corresponding to the space between the discs. The support component is used to drive the washing component to extend into the space between the discs. The washing component includes a first pressurizing baffle to increase the pressure and speed of the water flow within the space between the discs.

[0006] In one embodiment, the first pressure baffle is inclined relative to the side of the disk, the first pressure baffle is spaced apart from the disk, and the distance between the first pressure baffle and the side of the disk gradually decreases along the rotation direction of the disk.

[0007] In one embodiment, the elution assembly further includes a second pressure baffle, which is connected to the end of the first pressure baffle with the largest distance between it and the disc, and the inclination of the second pressure baffle relative to the side of the disc is less than the inclination of the first pressure baffle relative to the side of the disc.

[0008] In one embodiment, the washing assembly further includes a brush, which is disposed at the end where the distance between the first pressure baffle and the side of the disc is the smallest, and the brush contacts the side of the disc.

[0009] In one embodiment, the brush includes a plurality of brush heads spaced apart along the length of the first pressurizing baffle, so that a channel is formed between adjacent brush heads for water to flow through.

[0010] In one embodiment, one end of the first pressure-boosting baffle is rotatably connected to the inner wall of the biochemical tank. The support assembly includes a base and a telescopic rod slidably connected to the base. The lower end of the base is rotatably connected to the inner wall of the biochemical tank, and the upper end of the telescopic rod is rotatably connected to the lower side of the first pressure-boosting baffle, so that the telescopic rod drives the first pressure-boosting baffle to rotate.

[0011] In one embodiment, the cleaning device includes two washing and rinsing components arranged symmetrically on the left and right sides to clean the discs on both sides of the interval space respectively.

[0012] The advantages of this application compared to the prior art are:

[0013] In this embodiment, when it is necessary to clean excessively thick aged biofilm, the support component drives the first pressure baffle of the elution component to extend into the space between the discs. This adds a first pressure baffle to the already narrow space, reducing the thickness of the water flow on the side of the disc from the original distance between adjacent discs to the distance from the disc to the first pressure baffle. This reduces the flow area of ​​the water flow at the disc corresponding to the first pressure baffle, thereby increasing the water pressure and flow velocity at this point. This increases the shear force of the water flow on the biofilm on the disc. The elution shear force at this point is greater than the initial shear force, causing the biofilm to detach from the disc, thus achieving the effect of eluting excessively thick biofilm. Moreover, the elution can be performed directly during the normal operation of the rotating disc assembly, without the need for special shutdown for cleaning, which is simple, quick, and ensures the continuous operation of wastewater treatment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram showing the positional relationship between the cleaning device and the disk in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the overall structure of the wastewater treatment equipment in the embodiments of this application;

[0017] Figure 3 This is a schematic diagram of the first pressurization baffle in the interval space in an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the structure in an embodiment of this application where a second pressure-boosting baffle is connected to the first pressure-boosting baffle;

[0019] Figure 5 This is a schematic diagram of the structure of the first pressure baffle plate with a brush in the embodiment of this application;

[0020] Figure 6 This is a schematic diagram of the structure of the support component in the embodiments of this application. Detailed Implementation

[0021] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0025] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0026] Please refer to Figure 2 This application discloses a self-cleaning biological rotating disc wastewater treatment device, including a biological tank 100, a rotating disc device 300, and a drive device 200. The biological tank 100 has an inlet and an outlet. The rotating disc device 300 is disposed within the biological tank 100 and includes a rotating shaft 310 and multiple discs 320 disposed on the rotating shaft 310, with a space 330 between adjacent discs 320. The drive device 200 is connected to the rotating shaft 310. During operation, the drive device 200 drives the rotating shaft 310 to rotate the biological disc. Wastewater enters the biological tank 100 from the inlet. The biological disc is partially submerged in the wastewater and partially exposed to the air. Microorganisms on the portion of the biological disc that rotates out of the wastewater surface come into contact with the air, increasing dissolved oxygen in the water film. The portion of the biological disc that rotates into the wastewater adsorbs organic pollutants from the wastewater through the biofilm and absorbs dissolved oxygen from the water film to decompose the organic matter.

[0027] In this embodiment, the biological rotating disc has multiple discs 320 spaced apart axially along the rotating shaft 310. Biofilm forms on both sides of the discs 320, and spacers 330 are formed between adjacent discs 320. When the biological rotating disc rotates, it causes the water in the spacers 330 to flow, thereby generating shear force on the biofilm. If the biofilm thickness is moderate, the shear force of the water in the spacers 330 on the biofilm can cause the aging biofilm to detach naturally. However, if the biofilm is too thick, the shear force of the water in the spacers 330 on the biofilm is insufficient to cause the aging biofilm to detach naturally, requiring shutdown for specialized cleaning in the prior art.

[0028] Please refer to Figure 1The difference between this application embodiment and the prior art is that the self-cleaning biological rotating disc sewage treatment equipment also includes a cleaning device 400. The cleaning device 400 includes a support component 420 and a washing component 410. The washing component 410 is arranged corresponding to the interval space 330. The support component 420 is used to drive the washing component 410 to extend into the interval space 330. The washing component 410 includes a first pressurizing baffle 411 to increase the pressure and speed of the water flow in the interval space 330. In this embodiment, when the turntable device 300 is operating normally, the washing assembly 410 is located outside the turntable device 300, that is, the washing assembly 410 does not extend into the space 330 between the discs 320 of the turntable assembly. At this time, the water flow in the space 330 has an initial shearing force on the discs 320. However, when it is necessary to clean an excessively thick aging biofilm, the support assembly 420 drives the first pressure baffle 411 of the washing assembly 410 to extend into the space 330 between the discs 320. This adds a first pressure baffle 411 to the already relatively narrow space 330, increasing the water flow on the side of the discs 320. The thickness is reduced from the original spacing between adjacent discs 320 to the distance from disc 320 to the first pressurizing baffle 411. This reduces the flow area of ​​water at the disc 320 corresponding to the first pressurizing baffle 411, thereby increasing the water pressure and flow velocity at this point. This increases the shear force of the water flow on the biofilm on the disc 320. The shear force at this point is greater than the initial shear force, which causes the biofilm to detach from the disc 320, thus achieving the effect of washing away excessively thick biofilm. Moreover, the washing can be carried out directly during the normal operation of the rotating disc assembly without the need for special shutdown for cleaning, which is simple, quick, and ensures the continuous operation of wastewater treatment.

[0029] Please refer to Figure 3 Furthermore, in this embodiment, the first pressure-boosting baffle 411 is preferably inclined relative to the side of the disc 320. The first pressure-boosting baffle 411 is spaced apart from the disc 320, and the distance between the first pressure-boosting baffle 411 and the side of the disc 320 gradually decreases along the rotation direction of the disc 320. In this embodiment, the first pressure-boosting baffle 411 is not arranged parallel to the side of the disc 320, but is inclined relative to the side of the disc 320, and the distance between the first pressure-boosting baffle 411 and the side of the disc 320 gradually decreases along the rotation direction of the disc 320. In this way, when the disc 320 rotates and drives the water flow to generate a flow in the same direction, the flow area of ​​the water flow gradually decreases when it flows through the area corresponding to the first pressure-boosting baffle 411, thereby gradually increasing the water pressure and the flow velocity, which can further enhance the elution shear force of the water flow on the biofilm. The first pressure-boosting baffle 411 and the disc 320 are spaced apart, forming a channel between the first pressure-boosting baffle 411 and the disc 320 to allow water to flow through.

[0030] Please refer to Figure 4 Furthermore, in this preferred embodiment, the elution assembly 410 further includes a second pressurizing baffle 412. The second pressurizing baffle 412 connects to the end of the first pressurizing baffle 411 with the largest distance between it and the disc 320, and the inclination of the second pressurizing baffle 412 relative to the side of the disc 320 is less than the inclination of the first pressurizing baffle 411 relative to the side of the disc 320. During the flow process, the water first enters the corresponding area of ​​the second pressurizing baffle 412, undergoing a first round of pressurization and acceleration, and then enters the corresponding area of ​​the first pressurizing baffle 411, undergoing a second round of pressurization and acceleration. Thus, the water flow undergoes two rounds of gradual pressurization and acceleration, which can progressively increase the shear force on the biofilm in both areas, causing the biofilm to detach from the disc 320. Furthermore, since the inclination of the first pressurizing baffle 411 relative to the disc 320 is greater than that of the second pressurizing baffle 412 relative to the disc 320, the water flow will experience an instantaneous acceleration and reduction in the flow area when flowing from the second pressurizing baffle 412 to the first pressurizing baffle 411. The instantaneously accelerated portion of the water flow directly impacts the first pressurizing baffle 411, forming turbulence between the first pressurizing baffle 411 and the second pressurizing baffle 412. The turbulence causes additional impact on the biofilm on the disc 320, which can further promote the detachment of the biofilm from the disc 320 and improve the cleaning effect on the biofilm.

[0031] Please refer to Figure 5 Furthermore, in a preferred embodiment of this application, the elution assembly 410 further includes a brush 413. The brush 413 is disposed at the end where the distance between the first pressurizing baffle 411 and the side of the disc 320 is the smallest, and the brush 413 contacts the side of the disc 320. Water flows through the gap between the first pressurizing baffle 411 and the side of the disc 320, mainly eluting the biofilm through shear force. The placement of the brush 413 at the end where the distance between the first pressurizing baffle 411 and the side of the disc 320 is the smallest allows the brush 413 to directly act on the biofilm. When the disc 320 rotates, it generates relative motion with the elution assembly 410, causing the brush 413 to brush away some stubborn biofilm fragments, further improving the cleaning effect on the biofilm. The brush 413 has gaps in its bristles to allow water to flow through. However, if one end of the first pressure-boosting baffle 411 is covered with the bristles of the brush 413, the flow rate will still be excessively reduced due to the obstruction, resulting in excessive water pressure and poor water flow. Therefore, in this embodiment, the brush 413 preferably includes multiple brush heads spaced apart along the length of the first pressure-boosting baffle 411, so that channels are formed between adjacent brush heads to allow water to flow through, ensuring the flow rate and avoiding excessive water pressure and poor water flow.

[0032] Please refer to Figure 6Furthermore, in this embodiment of the application, one end of the first pressure baffle 411 is rotatably connected to the inner wall of the biochemical tank 100. The support assembly 420 includes a base 421 and a telescopic rod 422 slidably connected to the base 421. The lower end of the base 421 is rotatably connected to the inner wall of the biochemical tank 100, and the upper end of the telescopic rod 422 is rotatably connected to the lower side of the first pressure baffle 411, so that the telescopic rod 422 drives the first pressure baffle 411 to rotate. When the biofilm needs to be cleaned, the telescopic rod 422 extends outward to push the first pressure baffle 411 upward, causing the first pressure baffle 411 to rotate upward and extend into the partition space 330, thereby pressurizing and accelerating the water flow in the partition space 330. After cleaning is completed, the telescopic rod 422 retracts back to the base 421 to pull the first pressure baffle 411 downward, causing the first pressure baffle 411 to rotate downward and leave the partition space 330, restoring the water flow in the partition space 330 to normal water pressure and flow rate, generating initial shear force on the biofilm. In this embodiment, the telescopic rod 422 preferably pushes the first pressure baffle 411 to a horizontal position. At this time, the first pressure baffle 411 is located at the middle position in the vertical direction of half of the disk 320, that is, the first pressure baffle 411 extends radially along the middle position in the vertical direction of the disk 320. At this position, the working area between the first pressure baffle 411 and the disk 320 is relatively large. When the first pressure baffle 411 is in the retracted state, the support assembly 420 retracts to approximately abut the inner wall of the biochemical tank 100, and the first pressure baffle 411 is approximately abutted against the support assembly 420. In this embodiment, the telescopic rod 422 needs to be fixed relative to the base 421 to maintain its position. Therefore, the base 421 preferably has an inner cavity. The telescopic rod 422 is inserted into the inner cavity and moves within it. Multiple positioning holes 4211 are provided along the axial direction on the wall of the base 421. The positioning holes 4211 communicate with the inner cavity. An elastic pin 4221 is provided on the outer wall of the telescopic rod 422. When the elastic pin 4221 is pressed, the telescopic rod 422 can be extended or retracted. When the telescopic rod 422 is in place, the elastic pin 4221 is released, allowing the elastic pin 4221 to extend into the positioning hole 4211, thereby achieving the positioning of the telescopic rod 422 on the base 421 and thus stably supporting the washing and elution assembly 410.

[0033] Furthermore, in some embodiments, the cleaning device 400 preferably includes two washing and rinsing components 410 arranged symmetrically on the left and right sides to clean the discs 320 on both sides of the interval space 330 respectively. In this way, in the same cleaning device 400, the left and right support components 420 are fixedly connected as a whole and then supported by the support components 420, so that the sides of the discs 320 on both sides of the same interval space 330 are cleaned.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A self-cleaning biological rotating disc wastewater treatment device, comprising a biological tank, a rotating disc assembly, and a drive unit, wherein the biological tank has an inlet and an outlet, the rotating disc assembly is disposed within the biological tank, and the rotating disc assembly includes a rotating shaft and a plurality of discs disposed on the rotating shaft, with spaced intervals between adjacent discs, and the drive unit is connected to the rotating shaft, characterized in that, It also includes a cleaning device, which includes a support assembly and a washing assembly. The washing assembly is disposed corresponding to the interval space. The support assembly is used to drive the washing assembly to extend into the interval space. The washing assembly includes a first pressurizing baffle to increase the pressure and speed of the water flow in the interval space.

2. The self-cleaning biological rotating disc wastewater treatment equipment according to claim 1, characterized in that, The first pressure baffle is inclined relative to the side of the disc, the first pressure baffle is spaced apart from the disc, and the distance between the first pressure baffle and the side of the disc gradually decreases along the rotation direction of the disc.

3. The self-cleaning biological rotating disc wastewater treatment equipment according to claim 2, characterized in that, The washing assembly further includes a second pressure baffle, which is connected to the end of the first pressure baffle with the largest distance between it and the disc, and the inclination of the second pressure baffle relative to the side of the disc is less than the inclination of the first pressure baffle relative to the side of the disc.

4. The self-cleaning biological rotating disc wastewater treatment equipment according to claim 1, characterized in that, The washing and desorption assembly also includes a brush, which is located at the end where the distance between the first pressure baffle and the side of the disc is the smallest, and the brush contacts the side of the disc.

5. The self-cleaning biological rotating disc wastewater treatment equipment according to claim 4, characterized in that, The brush includes a plurality of brush heads spaced apart along the length of the first pressurizing baffle, so that a channel is formed between adjacent brush heads for water to flow through.

6. The self-cleaning biological rotating disc wastewater treatment equipment according to claim 1, characterized in that, One end of the first pressure-boosting baffle is rotatably connected to the inner wall of the biochemical tank. The support assembly includes a base and a telescopic rod that is slidably connected to the base. The lower end of the base is rotatably connected to the inner wall of the biochemical tank, and the upper end of the telescopic rod is rotatably connected to the lower side of the first pressure-boosting baffle, so that the telescopic rod drives the first pressure-boosting baffle to rotate.

7. The self-cleaning biological rotating disc wastewater treatment equipment according to claim 1, characterized in that, The cleaning device includes two washing and rinsing components arranged symmetrically on the left and right sides to clean the discs on both sides of the interval space respectively.

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