Rotary filter and filtering system for wet garbage slurry

Abstract

The utility model relates to a rotary filter and filtering system for wet garbage slurry, the filter comprises a tubular shaft (1) capable of rotating, the interior of the tubular shaft (1) is hollow and is provided with a filtrate collecting pipe (2), the exterior of the tubular shaft (1) is symmetrically provided with a plurality of filtering units (3) along the circumferential direction, and a vibration triggering unit (4) is also arranged below the tubular shaft (1). The filter unit (3) comprises a filter tank (31) and a filter screen (32) arranged above the filter tank (31), and the bottom of the filter tank (31) is movably connected with the tubular shaft (1) through a rolling shaft (5); the vibration triggering unit (4) comprises a semicircular protrusion (41) which can collide with the filtering groove (31) so as to enable the filtering unit (3) to vibrate. Compared with the prior art, viscous particles on the filter screen fall off by utilizing collision between the filter unit and the trigger vibration unit, so that blockage and particle leakage are effectively prevented, and the filtering rate of wet garbage slurry is improved.

Description

Technical Field

[0001] This utility model relates to the field of wet waste disposal technology, and in particular to a rotating filter and filtration system for wet waste slurry. Background Technology

[0002] The large amount of wet waste generated after waste sorting needs to be treated, and the treatment of wastewater such as leachate requires carbon source replenishment. Therefore, an organic slurry hydrolysis and acidification pretreatment experiment was conducted. This hydrolyzes long-chain organic polymers into smaller organic molecules, which can enhance the denitrification process, improve MBR nitrogen removal efficiency, and solve membrane fouling problems. Ensuring continuous and stable membrane operation is a key factor affecting the carbon source solution produced by the membrane. Wet waste mainly contains food waste: grains and their processed foods, meat and eggs and their processed foods, aquatic products and their processed foods, vegetables, leftover food, etc. After crushing, the organic slurry contains a large amount of the above-mentioned organic matter and sticky particles, which easily clog small-pore filter membranes / screens. Pre-filtration with a filter diameter of 0.2-2mm can be used before ceramic membrane filtration to achieve continuous and stable operation of the ceramic membrane.

[0003] Current solution filtration methods mainly use sand filters, fiber filters, activated carbon filters, and ceramic filters, which are prone to clogging. Commonly used screen filters include vibrating screens and circular screens, but food particles in the slurry are highly adhesive and tend to aggregate on the screen, causing blockage.

[0004] For example, Chinese patent CN112360749A discloses a multi-stage centrifugal pump with sludge removal function for drainage. The filtration device mainly uses a motor to drive a threaded rod to rotate, which moves a fixed block and, in turn, moves an L-shaped rod and a scraper to remove debris from the first filter screen. The scraper then pushes the debris into the discharge port. This solves the problem of existing centrifugal pumps being easily clogged by flocculent debris in the sewage, requiring pumping to be stopped, resulting in low efficiency and wasted manpower. However, this centrifugal pump mainly relies on a motor to drive the scraper to remove debris from the filter screen, which can easily damage the screen, reducing its lifespan and filtration efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a rotary filter and filtration system for wet waste slurry. The filter can filter particulate matter in organic slurry and remove sticky particles from the filter screen, thereby improving the filtration rate of wet waste slurry.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] This utility model provides a rotary filter for wet waste slurry, comprising a rotatable tubular shaft, the tubular shaft being hollow and equipped with a filtrate collection pipe, and a plurality of filtration units symmetrically arranged along the circumference of the tubular shaft. A vibration triggering unit is also provided below the tubular shaft.

[0008] The filter unit includes a filter tank and a filter screen disposed above the filter tank. The bottom of the filter tank is movably connected to a tubular shaft via a rolling shaft.

[0009] The vibration triggering unit includes a semi-circular protrusion that can collide with the filter tank to cause the filter unit to vibrate.

[0010] This invention uses the collision between the filter tank and the semi-circular protrusion in the vibration triggering unit to cause the filter unit to vibrate, effectively removing particles adhering to the surface of the filter screen, thereby avoiding the efficiency reduction caused by clogging in traditional filters.

[0011] Preferably, the side wall of the filter tank away from the tubular shaft is provided with an outwardly extending trigger plate. The rotation trajectory arc of the trigger plate is tangent to the semi-circular protrusion. When the filter unit rotates to the semi-circular protrusion, the trigger plate collides with the semi-circular protrusion to trigger vibration, and the filter unit deflects in the opposite direction of rotation around the rolling axis.

[0012] Preferably, the deflection angle θ is 5-20°.

[0013] More preferably, the deflection angle θ is 5-15°.

[0014] Preferably, the semi-circular protrusion is disposed on the support plate, and the radius r of the semi-circular protrusion and the length L of the bottom of the filter tank satisfy the following relationship: r = L / cos(θ) - L.

[0015] Preferably, the height h of the support plate is in the range of 5-15mm.

[0016] In this invention, the tubular shaft is the main rotating body, and the rolling shaft is fixed on the tubular shaft. When the filter unit encounters the obstruction of the semi-circular protrusion, it can deflect in the opposite direction with the rolling shaft as the fulcrum, without rigidly breaking.

[0017] Preferably, the filter unit is further provided with a tension spring that can reset the filter unit. One end of the tension spring is connected to the filter groove, and the other end is connected to the tubular shaft.

[0018] Preferably, the filter screen is provided with an anti-overflow fold at one end near the tubular shaft to prevent the viscous particles from scattering. The anti-overflow fold extends obliquely outward from the top of the filter screen and is close to the outer wall of the tubular shaft. The angle between the anti-overflow fold and the plane of the filter screen is 45-80°.

[0019] In this invention, the anti-overflow fold is closely fitted to the tubular shaft, thereby effectively preventing the scattering of sticky particles during the filtration process and ensuring the stability of the filtration process and the reliability of the filtration effect.

[0020] Preferably, the end of the filter tank near the tubular shaft is connected to the tubular shaft, and a small hole for the filtrate to pass through is provided at the connection between the tubular shaft and the filter tank. The diameter of the small hole is 2-5 mm.

[0021] More preferably, the small hole is a groove-shaped opening, which is disposed between the filter tank and the rolling shaft on the tubular shaft, and the filtrate flows from the groove-shaped opening of the tubular shaft to the internal filtrate collection pipe.

[0022] Preferably, the filtrate collection tube is nested inside the tubular shaft and coaxially arranged with the tubular shaft. One end of the filtrate collection tube is closed, and the other end extends to the outside of the tubular shaft and is connected to the filtrate outlet. The filtrate collection tube is in communication with the tubular shaft, and the filtrate collection tube is provided with an opening that allows filtrate to flow from the tubular shaft to the filtrate collection tube.

[0023] Preferably, the tubular shaft is connected to a drive motor capable of driving the tubular shaft to rotate, and the rotation speed of the tubular shaft is 0.5-10 revolutions per minute.

[0024] Preferably, the filter screen is made of stainless steel or nylon mesh with a pore size of 0.2-2mm and has a supporting frame.

[0025] Preferably, the filter units are arranged in an even number combination between 4 and 16.

[0026] On the other hand, this utility model also provides a wet waste slurry rotary filtration system, including the aforementioned wet waste slurry rotary filter, a feed pipe disposed above the filter for conveying wet waste slurry to the filtration unit, and a filter residue collection tank disposed below the filter for collecting filter residue.

[0027] In practical operation, the drive motor drives the tubular shaft to rotate, thereby driving the filter unit to rotate. When the filter unit rotates upward, as it gradually rises, under the action of gravity, the filtrate filtered by the filter screen will slowly overflow from the filter tank near the end of the tubular shaft and automatically flow into the filtrate collection tube through the small holes on the tubular shaft.

[0028] This invention utilizes the collision between the filter unit and the trigger vibration unit to remove sticky particles from the filter screen. Its working principle is as follows: When the trigger plate on the filter tank rotates to the position of the semi-circular protrusion, the trigger plate collides with the semi-circular protrusion, which blocks the rotation of the filter unit. Due to the rolling shaft, after the trigger plate collides with the semi-circular protrusion, the filter tank deflects in the opposite direction with the rolling shaft as the fulcrum, and the anti-overflow fold moves away from the tubular shaft. At this time, driven by the drive motor, the tubular shaft continues to rotate along its original rotation trajectory. Therefore, due to the obstruction of the semi-circular protrusion, the angle of deflection of the filter tank continuously increases. When the angle of deflection is large enough, under the action of elasticity, the tension spring will violently pull the filter tank back, rendering the obstruction of the semi-circular protrusion ineffective. The filter tank then rapidly rotates with the rolling shaft as the fulcrum. At this time, on the one hand, the filter screen vibrates violently under the action of the semi-circular protrusion; on the other hand, the anti-overflow fold violently collides with the tubular shaft, causing the sticky particles on the filter screen to vibrate and fall off, effectively preventing blockage and particle leakage, and improving the filtration rate of wet waste slurry.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) This utility model is designed with a rotating filter for wet waste slurry through a structure including a tubular shaft, a filter unit, a rolling shaft and a vibration triggering unit. It can achieve efficient and continuous filtration of wet waste slurry and effectively prevent clogging and particle leakage.

[0031] (2) This utility model mainly relies on vibration and gravity to remove sticky particles from the filter screen, which does not easily damage the filter screen, effectively extending the service life of the filter screen and improving the filtration rate of wet waste slurry.

[0032] (3) This utility model uses the collision between the trigger plate on the filter tank and the semi-circular protrusion in the vibration trigger unit to make the filter unit deflect in the opposite direction (5-20°) with the rolling shaft as the fulcrum and generate vibration, effectively peeling off the particles adhering to the surface of the filter screen, avoiding the efficiency reduction caused by clogging of traditional filters, reducing the frequency of downtime cleaning, and improving continuous operation capability.

[0033] (4) This utility model uses a tension spring in conjunction with low-speed rotation (0.5-10 rpm). On the one hand, it can automatically reset the filter unit after triggering vibration, so that the filter can run continuously and improve the filtration efficiency. On the other hand, it can avoid mechanical impact damage and extend the service life of the filter screen.

[0034] (5) This utility model clarifies the length relationship between the radius of the semicircular protrusion and the size of the filter tank (r=L / cos(θ)-L), improves the matching between the deflection angle θ, the radius of the semicircular protrusion and the size of the filter tank after triggering vibration, optimizes vibration parameters, and avoids the risk of equipment jamming caused by excessive deflection. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of this utility model;

[0036] Figure 2 This is a dimensioned drawing of the present invention;

[0037] In the figure, 1-tubular shaft, 2-filtrate collection pipe, 3-filtration unit, 31-filtration tank, 32-filter screen, 33-trigger plate, 34-anti-overflow fold, 4-vibration trigger unit, 41-semi-circular protrusion, 42-support plate, 5-rolling shaft, 6-tension spring, 7-feed pipe, 8-filter residue collection tank. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Unless otherwise specified, the functional components or structures in the following embodiments or examples are conventional components or structures used in the art to achieve the corresponding functions.

[0042] Example 1

[0043] A rotary filter for wet waste slurry, such as Figure 1 As shown, it includes a rotatable tubular shaft 1, a filter unit 3, and a vibration triggering unit 4.

[0044] Tubular shaft 1: It can rotate and its interior is hollow, with the filtrate collection tube 2 installed inside.

[0045] Filtering unit 3: Multiple units are symmetrically distributed around the outside of the tubular shaft 1 along the circumferential direction. Each filtering unit 3 consists of a filter tank 31 and a filter screen 32. The filter screen 32 is located above the filter tank 31. The bottom of the filter tank 31 is movably connected to the tubular shaft 1 by means of a rolling shaft 5.

[0046] Vibration triggering unit 4: installed below the tubular shaft 1, its core component is a semi-circular protrusion 41, which can collide with the filter tank 31, thereby causing the filter unit 3 to vibrate.

[0047] Example 2

[0048] A rotary filter for wet waste slurry, based on Embodiment 1, has a tubular shaft 1 connected to a drive motor. Driven by the drive motor, the tubular shaft 1 can rotate at a speed of 0.5-10 revolutions per minute, thereby driving the filter unit 3 to rotate.

[0049] In this embodiment, the filtrate collection tube 2 is nested inside the tubular shaft 1 and coaxially arranged with the tubular shaft 1. One end of the filtrate collection tube 2 is closed, and the other end extends to the outside of the tubular shaft 1 and connects to the filtrate outlet. The filtrate collection tube 2 is in communication with the tubular shaft 1, and an opening is provided on the filtrate collection tube 2 to allow filtrate to flow from the tubular shaft 1 to the filtrate collection tube 2. At the same time, the end of the filter tank 31 near the tubular shaft 1 is in communication with the tubular shaft 1. A small hole with a diameter of 2-5 mm is provided at the connection between the tubular shaft 1 and the filter tank 31 to allow filtrate to pass through.

[0050] As the filter unit 3 rotates upward, it gradually rises, and under the action of gravity, the filtrate filtered by the filter screen 32 will slowly overflow from the filter tank 31 near the end of the tubular shaft 1, and automatically flow into the filtrate collection pipe 2 through the small hole on the tubular shaft 1.

[0051] In this embodiment, a trigger plate 33 extending outward is provided on the side wall of the filter tank 31 away from the tubular shaft 1. The rotation trajectory arc of the trigger plate 33 is tangent to the semi-circular protrusion 41. When the filter unit 3 rotates to the semi-circular protrusion 41, the trigger plate 33 collides with the semi-circular protrusion 41 to trigger vibration. The filter unit 3 deflects around the rolling shaft 5 in the opposite direction of rotation, and the deflection angle θ is 5-20°.

[0052] In this embodiment, the vibration triggering unit 4 includes a semi-circular protrusion 41 and a support plate 42. The semi-circular protrusion 41 is disposed on the support plate 42, such as... Figure 2As shown, the radius r of the semicircular protrusion 41 and the bottom length L of the filter tank 31 satisfy the following relationship: r = L / cos(θ) - L, and the height h of the support plate 42 ranges from 5 to 15 mm.

[0053] In this embodiment, the filter screen 32 is provided with an anti-overflow fold 34 at one end near the tubular shaft 1 to prevent the filtered sticky particles from scattering. The anti-overflow fold 34 extends obliquely outward from the top of the filter screen 32 and is close to the outer wall of the tubular shaft 1. The angle between the anti-overflow fold 34 and the plane of the filter screen 32 is 45-80°.

[0054] In this embodiment, the filter unit 3 is also provided with a tension spring 6 that can reset the filter unit 3. One end of the tension spring 6 is connected to the filter groove 31 and the other end is connected to the tubular shaft 1. When the filter unit 3 deflects to a certain angle, the tension spring 6 can pull the filter unit back.

[0055] Example 3

[0056] This embodiment provides a rotary filtration system for wet waste slurry, including the rotary filter for wet waste slurry as in embodiment 2, a feed pipe 7 disposed above the filter for conveying wet waste slurry to the filtration unit 3, and a filter residue collection tank 8 disposed below the filter for collecting filter residue.

[0057] In this embodiment, the filter units 3 are arranged in an even number combination between 4 and 16. The filter screen 32 is made of stainless steel mesh with a pore size of 0.2 mm and has a supporting frame.

[0058] In actual operation, this embodiment includes the following steps:

[0059] (1) The water inlet pipe 7 delivers wet waste slurry to the filter unit 3 from the outside of the filter, and the filtrate after filtration by the filter screen 32 is collected in the filtrate tank 31.

[0060] (2) The drive motor drives the tubular shaft to rotate, thereby driving the filter unit to rotate. When the filter unit 3 rotates upward, under the action of gravity, the filtrate will overflow from the filter tank 31 near the shaft end of the tubular shaft 1 and automatically flow into the filtrate collection tube through the small hole on the tubular shaft 1.

[0061] (3) The trigger plate 33 on the filter tank 31 rotates with the filter unit 3 to the position of the semi-circular protrusion 41. The trigger plate 33 collides with the semi-circular protrusion 41. The semi-circular protrusion 41 blocks the filter unit 3 from continuing to rotate. The filter tank 31 deflects in the opposite direction with the rolling shaft 5 as the fulcrum. The anti-overflow fold 34 moves away from the tubular shaft 1.

[0062] (4) Driven by the drive motor, the tubular shaft 1 continues to rotate, and the semi-circular protrusion 41 causes the deflection angle of the filter tank 31 to increase continuously.

[0063] (5) When the deflection angle is large enough, the tension spring 6 pulls the filter tank 31 back violently, the semi-circular protrusion 41 fails to block, the filter tank 31 rotates rapidly, and at the same time, the filter screen 32, due to its own violent vibration and the violent collision between the anti-overflow fold 34 and the tubular shaft 1, causes the sticky particles to fall off and fall into the filter residue collection tank 8 below.

[0064] This embodiment, through the above-described structure, can effectively prevent clogging and particle leakage, and improve the filtration rate.

[0065] Example 4

[0066] Based on Example 3, this example provides a rotary filtration system for wet waste slurry. Filter units 3 are symmetrically distributed in four groups outside the tubular shaft 1. The rotating speed of the tubular shaft is 10 revolutions per minute. The height h of the support plate 42 is 5 mm, the deflection angle θ is 15°, the bottom length L of the filter tank 31 is 400 mm, and the radius r of the semi-circular protrusion 41 is calculated as follows:

[0067] r=400 / cos(15°)-400=14.11mm.

[0068] Example 5

[0069] Based on Example 3, this example provides a rotary filtration system for wet waste slurry. The filtration units 3 are symmetrically distributed in 8 groups outside the tubular shaft 1. The rotation speed of the tubular shaft is 5 revolutions per minute. The height h of the support plate 42 is 10 mm, the deflection angle θ is 20°, the bottom length L of the filter tank 31 is 500 mm, and the radius r of the semi-circular protrusion 41 is calculated as follows:

[0070] r=500 / cos(20°)-500=32.09mm.

[0071] Example 6

[0072] Based on Example 3, this example provides a rotary filtration system for wet waste slurry. The filtration units 3 are symmetrically distributed in 6 groups outside the tubular shaft 1. The rotation speed of the tubular shaft is 5 revolutions per minute. The height h of the support plate 42 is 15 mm, the deflection angle θ is 10°, the bottom length L of the filter tank 31 is 800 mm, and the radius r of the semi-circular protrusion 41 is calculated as follows:

[0073] r=800 / cos(10°)-800=12.34mm.

[0074] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A wet garbage slurry rotary filter characterized by, It includes a rotatable tubular shaft (1), which is hollow inside and equipped with a filtrate collection tube (2). Several filtration units (3) are symmetrically arranged around the outside of the tubular shaft (1) in the circumferential direction. A vibration triggering unit (4) is also provided below the tubular shaft (1). The filter unit (3) includes a filter tank (31) and a filter screen (32) disposed above the filter tank (31). The bottom of the filter tank (31) is movably connected to the tubular shaft (1) through a rolling shaft (5). The vibration triggering unit (4) includes a semi-circular protrusion (41) that can collide with the filter tank (31) to cause the filter unit (3) to vibrate.

2. The wet garbage slurry rotating filter according to claim 1, wherein The filter tank (31) has an outwardly extending trigger plate (33) on the side wall away from the tubular shaft (1). The rotation trajectory arc of the trigger plate (33) is tangent to the semi-circular protrusion (41). When the filter unit (3) rotates to the semi-circular protrusion (41), the trigger plate (33) collides with the semi-circular protrusion (41) to trigger vibration, and the filter unit (3) deflects around the rolling shaft (5) in the opposite direction of rotation.

3. The wet garbage slurry rotating filter according to claim 2, wherein The deflection angle θ is 5-20°.

4. The wet garbage slurry rotating filter according to claim 3, wherein The semicircular protrusion (41) is disposed on the support plate (42), and the radius r of the semicircular protrusion (41) and the bottom length L of the filter tank (31) satisfy the following relationship: r = L / cos(θ) - L.

5. The wet garbage slurry rotating filter according to claim 1, wherein The filter unit (3) is also provided with a tension spring (6) that can reset the filter unit (3). One end of the tension spring (6) is connected to the filter groove (31), and the other end is connected to the tubular shaft (1).

6. The wet garbage slurry rotating filter according to claim 1, wherein The filter screen (32) is provided with an anti-overflow fold (34) at one end near the tubular shaft (1) to prevent the viscous particles from being filtered from scattering. The anti-overflow fold (34) extends obliquely outward from the top of the filter screen (32) and is close to the outer wall of the tubular shaft (1). The angle between the anti-overflow fold (34) and the plane of the filter screen (32) is 45-80°.

7. The wet garbage slurry rotating filter according to claim 1, wherein The filter tank (31) is connected to the tubular shaft (1) at one end near the tubular shaft (1). A small hole for the filtrate to pass through is provided at the connection between the tubular shaft (1) and the filter tank (31). The diameter of the small hole is 2-5 mm.

8. The wet garbage slurry rotary filter according to claim 7, wherein The filtrate collection tube (2) is nested inside the tubular shaft (1) and is coaxial with the tubular shaft (1). One end of the filtrate collection tube (2) is closed, and the other end extends to the outside of the tubular shaft (1) and is connected to the filtrate outlet. The filtrate collection tube (2) is connected to the tubular shaft (1). The filtrate collection tube (2) is provided with an opening that allows the filtrate to flow from the tubular shaft to the filtrate collection tube (2).

9. The wet garbage slurry rotating filter according to claim 1, wherein The tubular shaft (1) is connected to a drive motor capable of driving the tubular shaft (1) to rotate, and the rotation speed of the tubular shaft (1) is 0.5-10 revolutions per minute.

10. A wet waste slurry rotary filtration system, characterized by, It includes a wet waste slurry rotary filter as described in any one of claims 1-9, a feed pipe (7) disposed above the filter for conveying wet waste slurry to the filter unit (3), and a filter residue collection tank (8) disposed below the filter for collecting filter residue.

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