Aeration biological filter with good purification effect

Abstract

The present invention relates to an aerated biological filter with good purification effect, comprising: a tank body, a filter material layer arranged in the tank body, a water outlet pipe arranged at the top of the tank body, a water inlet pipe arranged at the bottom of the tank body, and an aeration mechanism arranged below the filter material layer, wherein the aeration mechanism comprises: a fixing frame fixed in the tank body, an aeration bracket rotatably arranged on the fixing frame, an air inlet pipe connected to the bottom of the aeration bracket, and a rotary drive motor. The aeration mechanism of the present invention is provided with an aeration bracket with an air inlet cavity arranged inside, wherein a plurality of air outlet rods connected to the air inlet cavity are arranged around the top of the aeration bracket, and a plurality of air outlet holes are staggeredly distributed on each air outlet rod, and the aeration bracket is driven to rotate by a rotary drive motor, so that the floating bubbles formed by the plurality of air outlet rods continuously change the floating path, thereby improving the purification effect of the aerated biological filter on sewage.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an aerated biological filter with good purification effect. Background Art

[0002] Biologic aerated filter (BAF) is a new type of high-load fixed-bed biofilm reactor with the advantages of small size, high treatment efficiency, good effluent quality and simple process. It integrates filtration, interception and biological adsorption. Due to its excellent filtration and adsorption effect, it can not only be used for secondary and tertiary treatment of sewage, but also for pretreatment of slightly polluted water sources, etc., and has good application prospects.

[0003] In the existing aerated biological filter, oxygen is generally provided through an aeration pipe horizontally arranged below the filter material layer. The aeration pipe is simple in design, and a plurality of air outlets are arranged on a main pipe, and air is discharged through the plurality of air outlets.

[0004] The above-mentioned aeration pipe is simple in design and low in cost. However, since multiple air outlets are fixed on the same main pipe, the air outlets are fixed, so that the rising path of oxygen bubbles remains unchanged, which in turn causes the contact position between oxygen and the filter layer to remain fixed. The contact is not sufficient, resulting in poor oxidation and decomposition effect of the microbial membrane in the filter layer, resulting in poor purification effect of the aerated biological filter for sewage. Summary of the invention

[0005] In order to solve the above technical problem of insufficient contact between oxygen and filter material layer, the present invention provides an aerated biological filter with good purification effect.

[0006] The invention discloses an aerated biological filter with good purification effect, comprising: a tank body, a filter material layer arranged in the tank body, a water outlet pipe arranged at the top of the tank body, a water inlet pipe arranged at the bottom of the tank body and an aeration mechanism arranged below the filter material layer, wherein the aeration mechanism comprises: a fixing frame fixed in the tank body, an aeration bracket rotatably arranged on the fixing frame, an air inlet pipe connected to the bottom of the aeration bracket and a rotary drive motor, the aeration bracket is provided with an air inlet cavity connected to the air inlet pipe, a plurality of air outlet rods connected to the air inlet cavity are arranged around the top of the aeration bracket, each air outlet rod is staggered with a plurality of air outlet holes, a rotary rack is arranged around the outer wall of the aeration bracket, and one end of the rotary drive motor is meshed with the rotary rack.

[0007] According to one embodiment of the present invention, the gas outlet rod is arranged tilted relative to the aeration support.

[0008] According to one embodiment of the present invention, a vortex baffle is provided in the air inlet cavity, a circulating air duct is formed between the vortex baffle and the cavity wall of the air inlet cavity, and a plurality of air outlet rods are connected to the circulating air duct.

[0009] According to one embodiment of the present invention, a guide plate connected to the end of the vortex baffle is further provided in the air intake cavity, and the guide plate is inclined toward the vortex baffle.

[0010] According to an embodiment of the present invention, the aerated biological filter further comprises a cleaning brush disposed on one side of the aeration support and a cleaning cylinder driving the cleaning brush to move toward the aeration support.

[0011] According to one embodiment of the present invention, the aerated biological filter further comprises a filter screen disposed between the outlet pipe and the filter material layer.

[0012] The aeration mechanism of the present invention is provided with an aeration bracket with an air inlet cavity inside, wherein a plurality of air outlet rods connected to the air inlet cavity are arranged around the top of the aeration bracket, and a plurality of air outlet holes are staggered on each air outlet rod. The aeration bracket is driven to rotate by a rotating drive motor, so that the floating bubbles formed by the plurality of air outlet rods continuously change the floating path, thereby expanding the contact range between oxygen and the filter material layer, making the filter material layer more fully contact with the oxygen bubbles, and improving the purification effect of the aerated biological filter on sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the aerated biological filter with good purification effect in the present invention.

[0014] Figure 2 It is a cross-sectional view of the aeration support in the present invention. DETAILED DESCRIPTION

[0015] The aerated biological filter tank with good purification effect of the present invention will be further described in detail below with reference to specific embodiments and drawings.

[0016] Please refer to Figures 1 to 2 shown.

[0017] The present invention provides an aerated biological filter with good purification effect, which mainly comprises a tank body 1, a filter material layer 2 arranged in the tank body 1, a water outlet pipe 3 arranged at the top of the tank body 1, a water inlet pipe 4 arranged at the bottom of the tank body 1 and an aeration mechanism 5 arranged below the filter material layer 2.

[0018] The pretreated sewage enters the tank body 1 from the water inlet pipe 4, and then is oxidized and decomposed by the filter material layer 2 from the bottom right to the top, and then discharged from the tank body 1 through the water outlet pipe 3, wherein the aeration mechanism 5 provides oxygen below the filter material layer 2.

[0019] Specifically, the aeration mechanism 5 includes a fixed frame 501 fixed in the tank body 1, an aeration bracket 502 rotatably arranged on the fixed frame 501, an air inlet pipe 503 connected to the bottom of the aeration bracket 502, and a rotary drive motor 504. The aeration bracket 502 is provided with an air inlet cavity 5021 connected to the air inlet pipe 503, a plurality of air outlet rods 5022 connected to the air inlet cavity 5021 are arranged around the top of the aeration bracket 502, and each of the air outlet rods 5022 is staggered with a plurality of air outlet holes 50221, a rotating rack 5023 is arranged around the outer wall of the aeration bracket 5022, one end of the rotary drive motor 504 is meshed with the rotating rack 5023, and the rotary drive motor 504 drives the aeration bracket 502 to rotate through the rotating rack 5023, thereby driving the plurality of air outlet rods 5022 to rotate around the center of the aeration bracket 502.

[0020] When the aeration mechanism 5 of the present invention is working, an external air source enters the air inlet chamber 5021 through the air inlet pipe 503, then enters the multiple air outlet rods 5022 through the air inlet chamber 5021, and is finally discharged from the multiple air outlet holes 50221 on the air outlet rods 5022, forming a plurality of bubbles distributed in an alternating manner, wherein the rotary drive motor 504 drives the aeration bracket 502 to rotate through the rotating rack 5023, so that the floating bubbles formed by the multiple air outlet rods 5022 continuously change the floating path, thereby expanding the contact range between the oxygen and the filter material layer 2, so that the filter material layer 2 and the oxygen bubbles provided by the aeration mechanism 5 are in more sufficient contact, thereby improving the purification effect of the aerated biological filter on sewage.

[0021] Furthermore, the air outlet rod 5022 is tilted relative to the aeration bracket 502, so that the multiple air outlet holes 50221 are better distributed and staggered in the vertical direction, thereby increasing the distribution range of oxygen bubbles provided by the aeration mechanism 5 and further improving the contact effect between the filter material layer 2 and the oxygen bubbles.

[0022] Furthermore, a vortex baffle 5024 is provided in the air inlet chamber 5021, and the vortex baffle 5024 guides the air source entering from the air inlet pipe 503, and a circulation air duct 5025 is formed between the vortex baffle 5024 and the wall of the air inlet chamber 5021, and a plurality of air outlet rods 5022 are connected to the circulation air duct 5025. Specifically, the air source is guided by the vortex baffle 5024 and finally circulates in the circulation air duct 5025, and enters each air outlet rod 5022 from the circulation air duct 5025, and is finally discharged through the air outlet hole 50221. In this way, the air source and flow rate of the air source transported to each air outlet rod 5022 are consistent, so that the steam drum formed by each air outlet rod 5022 remains consistent, thereby effectively improving the stability of the aeration process of the aeration mechanism 5, and at the same time maintaining the stability of the oxidation treatment of the filter material layer 2. It is worth noting that a guide plate 5026 connected to the end of the vortex baffle 5024 is also provided in the air inlet cavity 5021, and the guide plate 5026 is inclined toward the vortex baffle 5025. In this way, the process of the air source guided by the vortex baffle 5024 being input into the circulating air duct 5025 is smoother, reducing the impact on the airflow circulating in the circulating air duct 5025.

[0023] Furthermore, the aerated biological filter also includes a cleaning brush 6 arranged on one side of the aeration bracket 502 and a cleaning cylinder 7 that drives the cleaning brush 6 to move toward the aeration bracket 502, wherein the cleaning cylinder 7 drives the cleaning brush 6 to move toward the aeration bracket 502 so that the bristles of the cleaning brush 6 contact the air outlet rod 5022, and the aeration bracket 502 rotates under the driving action of the rotary drive motor 504, so as to clean the multiple air outlet holes 50221 on the air outlet rod 5022, effectively avoiding the air outlet holes 50221 from being blocked due to the accumulation of organic matter, thereby ensuring the stability of the air outlet of the aeration mechanism 5.

[0024] Furthermore, the aerated biological filter also includes a filter screen 8 arranged between the outlet pipe 3 and the filter material layer 2, wherein the completely decomposed organic suspended matter is isolated by the filter screen 8, thereby further improving the purification degree of the wastewater discharged from the outlet pipe 3.

[0025] To summarize, the aeration mechanism of the present invention is provided with an aeration bracket with an air inlet cavity inside, wherein a plurality of air outlet rods connected to the air inlet cavity are arranged around the top of the aeration bracket, and a plurality of air outlet holes are staggered on each air outlet rod. The aeration bracket is driven to rotate by a rotating drive motor, so that the floating bubbles formed by the plurality of air outlet rods continuously change the floating path, thereby expanding the contact range between oxygen and the filter material layer, making the filter material layer more fully contact with the oxygen bubbles, and improving the purification effect of the aerated biological filter on sewage.

[0026] In the description of the present invention, it is necessary to understand that terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] Although the present invention is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes according to the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the present invention.

Claims

1. An aerated biological filter with good purification effect, characterized in that: include: A pool body, a filter material layer arranged in the pool body, a water outlet pipe arranged at the top of the pool body, a water inlet pipe arranged at the bottom of the pool body and an aeration mechanism arranged below the filter material layer, the aeration mechanism comprising: a fixing frame fixed in the pool body, an aeration bracket rotatably arranged on the fixing frame, an air inlet pipe connected to the bottom of the aeration bracket and a rotating drive motor, the aeration bracket is provided with an air inlet cavity connected to the air inlet pipe, a vortex baffle is arranged in the air inlet cavity, a circulating air duct is formed between the vortex baffle and the wall of the air inlet cavity, and a plurality of air outlets connected to the air inlet cavity are arranged around the top of the aeration bracket Rod, the air outlet rod is tilted relative to the aeration bracket, each of the air outlet rods is staggered with a plurality of air outlet holes, the plurality of air outlet rods are connected to the circulating air duct, a guide plate connected to the end of the vortex baffle is also arranged in the air inlet cavity, the guide plate is tilted toward the vortex baffle, a rotating rack is arranged around the outer wall of the aeration bracket, and one end of the rotating drive motor is engaged with the rotating rack; the aerated biological filter also includes a cleaning brush arranged on one side of the aeration bracket, a cleaning cylinder driving the cleaning brush to move toward the aeration bracket, and a filter screen arranged between the water outlet pipe and the filter material layer.

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