An anaerobic tower anaerobic granular sludge recovery device

Abstract

This utility model discloses an anaerobic granular sludge recovery device for an anaerobic tower, belonging to the field of wastewater treatment technology. It includes a cylinder, a buffer plate, a filter element, a filter element support, and a flushing section. The cylinder includes an inlet, an outlet, and a support, which is circumferentially disposed on the inner wall of the cylinder. The buffer plate cooperates with the support. The buffer plate connects the inlet to the filter element. The support, circumferentially disposed on the inner wall of the cylinder, provides an installation and support base for the buffer plate. The buffer plate, as a pre-contact structure of the filter element, comes into contact with the water flow first to disperse the impact force of the water flow and transmits the impact force to the cylinder through the support, converting it into stress within the cylinder. Through the buffering effect of the buffer plate, the filter element is prevented from directly bearing the impact force of the water flow, reducing the damage to the filter element caused by dynamic loads. The filter element support serves as a rigid body to support the filter element. The flushing section is used to impact and remove the sludge on the buffer plate and the filter element.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically an anaerobic tower anaerobic granular sludge recovery device. Background Technology

[0002] Anaerobic digesters, as highly efficient anaerobic bioreactors, are widely used in industrial wastewater and municipal sewage treatment. Their core function is to degrade organic matter through the metabolic action of anaerobic microorganisms. The sludge-water mixture produced after the anaerobic digester's operation needs to be separated and treated by a recovery unit to recycle the clean water. The fine-mesh filter cartridge, as the core filtration component within the recovery unit, plays a crucial role in solid-liquid separation.

[0003] Traditional fine-mesh filter cartridges are mostly made of stainless steel wire mesh, polymer composite materials, or fiber woven structures. Their design goal is to effectively retain microorganisms while ensuring a certain porosity. However, under the high hydraulic load conditions of the recovery unit, especially when facing instantaneous water flow impacts, the mechanical performance defects of existing filter cartridges gradually become apparent. Specifically, the lateral compressive strength and shear strength of fine-mesh filter cartridges are insufficient, making it difficult to withstand the dynamic loads caused by water pressure fluctuations. Local areas of the filter cartridge are prone to plastic deformation, mesh tearing, or overall structural collapse, leading to filtration failure. Utility Model Content

[0004] The purpose of this invention is to provide an anaerobic tower anaerobic granular sludge recovery device to solve the problems mentioned in the prior art.

[0005] An anaerobic tower anaerobic granular sludge recovery device is provided, comprising:

[0006] A cylindrical body, comprising an inlet, an outlet, and a support, wherein the support is circumferentially disposed on the inner wall of the cylindrical body;

[0007] The buffer plate works in conjunction with the support frame;

[0008] The filter element, and the buffer plate connects the water inlet to the filter element.

[0009] Furthermore, the buffer plate and the central axis of the inlet form an angle of α degrees, and the angle α is 35° to 55°.

[0010] By tilting the buffer plate relative to the inlet, a lateral force is generated on the cross-section of the buffer plate when it is subjected to water flow impact. This alleviates the vertical shear force on the support connected to the buffer plate, optimizes the stress distribution, and extends the service life of both the buffer plate and the support. Furthermore, the tilted design of the buffer plate alters the direction of the impacting water flow, fully utilizing the energy dissipation effect of the buffer plate.

[0011] Furthermore, the support and the cylinder are integrally formed.

[0012] The one-piece molding eliminates stress concentration points caused by welding or bolting, improves the consistency of mechanical strength between the support and the cylinder, and enhances the compressive and shear resistance of the connection point between the support and the cylinder.

[0013] Furthermore, the filter element and the support are detachably connected.

[0014] One end of the filter element is supported and limited by a bracket to reduce disturbance to the filter element caused by the buffer plate. The detachable structure allows for the replacement of filter elements with different pore sizes to meet different sludge interception particle size requirements.

[0015] Furthermore, the filter element and the buffer plate are detachably connected.

[0016] One end of the filter element is supported and limited by a buffer plate, facilitating the overall installation and removal of the filter element. The detachable structure allows for the replacement of filter elements with different pore sizes to meet varying requirements for sludge particle size interception.

[0017] Furthermore, it also includes a rinsing mechanism, which includes an inlet pipe and a spray pipe that are interconnected, the spray pipe being able to pass through the buffer plate and extend along the length of the filter element.

[0018] The rinsing mechanism is used to clean the sludge adhering to the buffer plates and filter elements to ensure efficient sludge-water separation. A clean water pipe is connected to the inlet pipe and directs clean water into the spray nozzles. The spray nozzles use water pressure to propel clean water from multiple outlets, creating jets that impact the sludge on the buffer plates and filter elements.

[0019] Furthermore, the flushing mechanism also includes a limiting sleeve and a rotary joint. The water inlet pipe and the spray pipe are connected through the rotary joint, and the spray pipe and the cylinder are rotatably connected through at least one limiting sleeve.

[0020] A rotary joint allows the nozzle to rotate relative to the inlet pipe, thereby increasing the flushing range of the water jet. A limiting sleeve provides structural support for nozzles with a large length-to-diameter ratio, ensuring rotational stability.

[0021] Furthermore, the nozzle has a plurality of nozzles circumferentially arranged, and the central axis of the nozzles avoids the central axis of the nozzle.

[0022] The eccentric nozzle structure drives the nozzle to rotate by the reaction force of the jet, forming a spiral flushing water flow without the need for additional power.

[0023] Furthermore, a sludge discharge port is provided on the part of the bottom wall of the cylinder that communicates with the inner cavity of the filter element.

[0024] The sludge and impurities trapped by the filter cartridge naturally settle to the bottom of the cylinder and can be discharged through the sludge outlet. The impurities return to the hydrolysis acidification tank and then back to the anaerobic tower, thus achieving a treatment cycle.

[0025] Furthermore, the filter element is provided with a stamped mesh plate and a dense mesh from the outside to the inside.

[0026] The stamped mesh plate serves as the rigid support layer for the dense mesh, bearing the residual impact force of the water flow after being guided by the buffer plate, and playing a shaping role for the dense mesh.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] The support frame encircles the inner wall of the cylinder, providing a mounting and support base for the buffer plate. As a pre-contact structure of the filter element, the buffer plate is the first to contact the water flow, dispersing its impact force and transferring it through the support frame to the cylinder, transforming it into internal stress. Through the buffering effect of the buffer plate, the filter element is prevented from directly bearing the impact force of the water flow, reducing the damage caused by dynamic loads. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 For anaerobic towers and anaerobic granular sludge recovery devices;

[0031] Figure 2 A cross-sectional structural diagram of the nozzle provided by this utility model.

[0032] In the diagram: 1. Cylinder; 11. Inlet; 12. Outlet; 13. Support; 2. Buffer plate; 3. Filter element; 4. Flushing mechanism; 41. Inlet pipe; 42. Spray pipe; 43. Limiting sleeve; 44. Rotary joint; 45. Nozzle; 5. Sludge discharge port. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments provided by this utility model without inventive effort are within the scope of protection of this utility model.

[0034] Obviously, the accompanying drawings described below are merely some examples or embodiments of this utility model. Those skilled in the art can apply this utility model to other similar scenarios without any creative effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this utility model, any changes to the design, manufacturing, or production methods based on the disclosed technical content are merely conventional technical means and should not be construed as insufficient disclosure of this utility model.

[0035] However, there may be instances where unnecessary detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of essentially the same structures may be omitted. This is to avoid making the following description unnecessarily lengthy and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this utility model and are not intended to limit the subject matter of the claims.

[0036] Please see Figure 1 As shown in the figure, the anaerobic granular sludge recovery device of the present invention includes a cylindrical body 1, a buffer plate 2, and a filter element 3. The cylindrical body 1 includes an inlet 11, an outlet 12, and a support 13, which is arranged around the inner wall of the cylindrical body 1. The buffer plate 2 cooperates with the support 13. The buffer plate 2 connects the inlet 11 and the filter element 3.

[0037] The recycler provided by this utility model is installed at about 1 / 3 of the height of the anaerobic tower. It uses the hydraulic impact force brought about by the conversion of the potential energy of the water effluent from the top of the anaerobic tower into kinetic energy as a power source to pass through the recycler, achieving the effect of mud-water separation without consuming additional energy.

[0038] A high-impact water flow enters the cylinder 1 through the inlet 11. The buffer plate 2 serves as the first contact surface, and its inclined structure dissipates the impact energy of the water flow and decomposes the impact force. The support 13 evenly distributes the impact force transmitted by the buffer plate 2 to the inner wall of the cylinder 1, preventing the filter element 3 from directly bearing the impact. The buffered water flow enters the filter element 3, where the filtration effect of the filter element 3 completes the interception of particulate sludge, and the clean water is discharged from the outlet 12.

[0039] The buffer plate 2 has multiple through holes on its surface to allow the mud-water mixture to flow through. The direction of the through holes is the same as the direction of the filter element 3, ensuring that the water flow is in full contact with the surface of the buffer plate 2 and the inner wall of the through holes to complete the energy consumption process.

[0040] The buffer plate 2 and the central axis of the inlet 11 form an angle of α degrees, with α ranging from 35° to 55°. When water impacts the buffer plate 2, the angle of inclination deflects the direction of the water flow. Part of the water flows into the filter element 3 through the through holes after colliding with the buffer plate 2; the rest of the water rises along the cross-section of the buffer plate 2 and flows into the filter element 3 through the through holes near the top of the buffer plate 2. Since the direction of the through holes is the same as the extension direction of the filter element 3, the mud-water mixture discharged from the through holes will not directly impact the filter element 3. This angle design optimizes the balance between the shear force and tensile and compressive stress borne by the support 13.

[0041] The support 13 and the cylinder 1 are formed into a seamless, integral structure through casting or forging, eliminating the weak points of traditional welding or bolted connections. The impact force is evenly diffused along the interface between the support 13 and the cylinder 1, avoiding structural fatigue or fracture caused by local stress concentration.

[0042] In one embodiment, the filter element 3 is detachably connected to the support 13. The filter element 3 is fixed to the support 13 by clips or flanges, and the support 13 provides rigid support, limiting the displacement of the filter element 3. Disassembly only requires disconnecting the filter element 3 from the support 13; no adjustment to the buffer plate 2 or the cylinder 1 structure is needed, enabling quick replacement of the filter element 3 and adapting to different sludge particle size interception requirements. This design is suitable for a structure where the filter element 3 can be replaced via an inspection port on the side of the regenerator.

[0043] In one embodiment, the filter element 3 is detachably connected to the buffer plate 2. One end of the filter element 3 is embedded in a pre-reserved groove or snap-fit ​​structure of the buffer plate 2, with the buffer plate 2 providing axial restraint. During disassembly, the buffer plate 2 pulls the filter element 3 out of the cylinder 1, preventing interference between the filter element 3 and the support 13. This design is suitable for a structure where the filter element 3 can be replaced through an inspection port located at the top of the recycler.

[0044] After a period of use, the filter needs to be rinsed. Therefore, a rinsing mechanism 4 is installed inside the filter. The rinsing mechanism 4 includes an inlet pipe 41 and a spray pipe 42 that are interconnected. The spray pipe 42 movably passes through the buffer plate 2 and extends along the length of the filter element 3. High-pressure clean water enters the spray pipe 42 from the inlet pipe 41 and is sprayed out from the side wall of the spray pipe 42 to form a jet. The jet directly impacts the surface of the filter element 3 and the buffer plate 2, peeling off the adhering particulate sludge. The rinsing mechanism 4 maintains filtration efficiency and reduces the frequency of manual cleaning by dynamically removing blockages from the filter element 3.

[0045] Furthermore, the flushing mechanism 4 also includes a limiting sleeve 43 and a rotary joint 44. The water inlet pipe 41 is connected to the nozzle 42 via the rotary joint 44, and the nozzle 42 is rotatably connected to the cylinder 1 via at least one limiting sleeve 43. The rotary joint 44 allows the nozzle 42 to rotate freely under the reaction force of the water flow, expanding the flushing coverage area. The limiting sleeve 43 constrains the radial swing of the nozzle 42 with a large length-to-diameter ratio, ensuring the stability of the rotation axis. The limiting sleeve 43 can use a bearing; the outer ring of the limiting sleeve 43 is fixed to the cylinder 1, and the inner ring is fixed to the nozzle 42 to ensure smooth rotation.

[0046] Please see Figure 1 and Figure 2 As shown, the nozzle 42 has several eccentrically arranged nozzles 45 along its circumference, with the central axis of each nozzle 45 avoiding the central axis of the nozzle 42. The jet from the eccentric nozzles 45 generates a reaction torque, driving the nozzle 42 to rotate around its own axis. The rotating nozzle 42 forms a spiral flushing trajectory, covering the entire surface of the filter element 3 and the buffer plate 2. To prevent the forces of each nozzle 45 from interfering with each other and affecting the torque output, each nozzle 45 can be arranged rotationally symmetrically in the circumferential direction.

[0047] In one specific embodiment, the central axis of the nozzle 45 is arranged tangentially to the circumference of the nozzle 42, maximizing the use of the energy of the cleaning fluid and converting it into torque applied to the nozzle 42, causing the nozzle 42 to rotate at high speed.

[0048] The bottom wall of the cylinder 1, which connects to the inner cavity of the filter element 3, is equipped with a sludge discharge port 5. The sludge discharge port 5 is equipped with a control valve. The granular sludge trapped by the filter element 3 settles to the bottom of the cylinder 1 due to gravity. The sludge discharge port 5 valve is opened periodically, and the sludge flows back to the hydrolysis acidification tank for recycling through the pipeline.

[0049] Filter cartridge 3 consists of a stamped mesh plate and a dense mesh screen arranged sequentially from the outside to the inside. The stamped mesh plate is a rigid support with evenly distributed mesh holes. The stamped mesh plate and the dense mesh screen are tightly attached, providing support and impact resistance for the flexible dense mesh screen. The aperture of the stamped mesh plate is approximately 10cm, serving to support the dense mesh screen. The dense mesh screen is designed according to the physicochemical indicators in the "Anaerobic Granular Sludge" standard (T / CBFIA 14001-2017): effective particle size (D) ≤ 5mm. Based on the granular sludge size of different anaerobic towers and wastewater anaerobic environments on site, a series of inner meshes with apertures of 5mm, 4mm, 3mm, and 2mm are prepared to prevent sludge loss under different wastewater conditions, anaerobic environments, periods, and conditions.

[0050] It should be noted that this utility model is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and function as the technical concept within the scope of this utility model are included within the technical scope of this utility model. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, are also included within the scope of this utility model without departing from the spirit of this utility model.

Claims

1. An anaerobic granular sludge recovery device for anaerobic towers, characterized in that, include: The cylinder (1) includes an inlet (11), an outlet (12) and a support (13), wherein the support (13) is arranged around the inner wall of the cylinder (1) and the support (13) is integrally formed with the cylinder (1); The buffer plate (2) cooperates with the bracket (13), and the buffer plate (2) and the central axis of the inlet (11) form an angle of α degrees, and the angle α is 35°~55°. The filter element (3) is connected to the filter element (3) by the buffer plate (2); The rinsing mechanism (4) includes an inlet pipe (41) and a spray pipe (42) that are connected to each other. The spray pipe (42) movably passes through the buffer plate (2) and extends along the length of the filter element (3). The rinsing mechanism (4) also includes a limiting sleeve (43) and a rotary joint (44). The inlet pipe (41) and the spray pipe (42) are connected through the rotary joint (44). The spray pipe (42) and the cylinder (1) are rotatably connected through at least one limiting sleeve (43).

2. The anaerobic granular sludge recovery device for an anaerobic tower according to claim 1, characterized in that, The filter element (3) is detachably connected to the bracket (13).

3. The anaerobic granular sludge recovery device for an anaerobic tower according to claim 1, characterized in that, The filter element (3) and the buffer plate (2) are detachably connected.

4. The anaerobic granular sludge recovery device for an anaerobic tower according to claim 1, characterized in that, The nozzle (42) has a plurality of nozzles (45) circumferentially arranged, and the central axis of the nozzles (45) avoids the central axis of the nozzle (42).

5. An anaerobic granular sludge recovery device for an anaerobic tower according to claim 1, characterized in that, The bottom wall of the cylinder (1) is connected to the inner cavity of the filter element (3) and is provided with a sludge discharge port (5).

6. An anaerobic granular sludge recovery device for an anaerobic tower according to claim 1, characterized in that, The filter element (3) is provided with a stamped mesh plate and a dense mesh from the outside to the inside.

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