Sludge grinding filter

Abstract

The invention provides a sludge grinding filter which comprises a horizontal grinding rotating mechanism, a vertical limiting frame, a rotating shaft, a filtering piece and a grinding piece, one end of the rotating shaft sequentially penetrates through the horizontal grinding rotating mechanism and the vertical limiting frame and is connected with the grinding piece, the filtering piece is located on the outer side of the grinding piece, and the other end of the rotating shaft is connected with the grinding piece. And the rotating shaft is matched with the grinding piece. The sludge grinding filter disclosed by the invention is easy to process and maintain and low in energy consumption, realizes automatic operation of filtration, has good grinding and filtering effects on impurities existing in sludge, provides good guarantee for a thermal hydrolysis process of subsequent sludge deep treatment, greatly prolongs the service life of the whole process flow, and improves the working efficiency of the whole process flow.

Description

Technical Field

[0001] The invention belongs to the field of sludge treatment, and in particular relates to a sludge grinding filter. Background Art

[0002] Sludge is a by-product of the sewage treatment process. my country produces about 70 million tons of sludge per year. The sludge discharged from sewage treatment plants has multiple characteristics such as large output, high impurities, difficulty in dehydration, and high pollutant concentration.

[0003] Sludge thermal hydrolysis is a very effective sludge treatment and disposal process. This process dilutes the sludge to a water content of 90% and then heats and pressurizes it, greatly improving the sludge dehydration effect and achieving sludge reduction and stabilization. Conventional sludge thermal hydrolysis equipment mostly uses tube-in-tube heat exchangers, which often cause congestion due to impurities such as stones, plastic pieces, broken porcelain pieces, and hair in the sludge produced by the sewage treatment plant, seriously affecting the operating efficiency of the thermal hydrolysis system.

[0004] Sludge is a paste-like non-Newtonian fluid with large viscous resistance. Traditional filters are very easy to clog and require frequent manual cleaning. The filtration efficiency is extremely low and it is difficult for filtration equipment to separate sludge from impurities. Summary of the invention

[0005] In view of this, the present invention aims to overcome the defects in the prior art and proposes a sludge grinding filter.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A sludge grinding filter comprises a horizontal grinding rotating mechanism, a vertical limit frame, a rotating shaft, a filter element and a grinding element. One end of the rotating shaft passes through the horizontal grinding rotating mechanism and the vertical limit frame in sequence and is connected to the grinding element. The filter element is located on the outside of the grinding element and cooperates with the grinding element.

[0008] Furthermore, the grinding piece is in an inverted conical structure, the surface of the grinding piece is provided with a spiral dirt receiving groove, the surface of the filter element is provided with a plurality of filter components, the filter components are matched with the dirt receiving groove, and a storage bin is provided below the filter element. The filter element is an inverted conical structure without a cap, and the surface is matched with the grinding piece.

[0009] Furthermore, the filter assembly includes a cutting head and a limiting groove, the cutting head is an arc-shaped structure, the top of the cutting head is located above the filter element, and the bottom is connected to the surface of the filter element, the top of the limiting groove is connected to the surface of the filter element, and the bottom is located below the surface of the filter element.

[0010] Furthermore, the bottom of the limit groove is located below the top of the cutting head, a hollow structure is formed between the bottom of the cutting head and the bottom of the limit groove, and the hollow structure is connected to the storage bin; the hole diameter of the hollow structure is 1-10mm. The hollow structure can be used as a cutting hole to intercept impurities with a diameter greater than 1-10mm, and can cut and crush the impurities under the action of external force.

[0011] Furthermore, a bearing is arranged inside the vertical limit frame, the rotating shaft is connected to the bearing, the filter is also provided with a support frame, a cylinder is arranged between the cross beam of the support frame and the vertical limit frame, and the cross beam is located above the grinding piece. The cylinder drives the rotating shaft to rise and fall through the vertical limit frame, the rotating shaft is fixedly connected to the inner side of the bearing, and the rise and fall of the rotating shaft does not affect its rotation.

[0012] Furthermore, a transmission gear is provided inside the horizontal grinding rotation mechanism, the transmission gear cooperates with the grinding motor, a guide groove is provided inside the transmission gear, a guide bar is provided on the upper outer side of the rotating shaft, the transmission gear is sleeved on the rotating shaft, and the guide groove cooperates with the guide bar. The transmission gear and the grinding motor are conventionally connected through gear meshing. The cooperation of the guide groove and the guide bar realizes the independence of the lifting and rotating of the rotating shaft.

[0013] The grinding motor drives the grinding element to rotate. When rotating counterclockwise, the large impurities are pushed to the cutting holes on the filter element, breaking the large impurities into small particles and passing through the filter element. When rotating clockwise, the large impurities move along the dirt receiving groove to the upper part of the filter element under the action of tangential stress and friction of the filter plate, and the impurities that cannot be cut and broken are taken away from the surface of the filter element, thus cleaning the filter element.

[0014] Furthermore, a feed inlet is provided at the bottom of the filter element, and the feed inlet is connected to a feed pump.

[0015] Furthermore, a slag discharge port is provided on the top of the filter element, and a guide plate is provided on the top of the grinding element, and the guide plate is located on one side of the slag discharge port.

[0016] Furthermore, valves are provided at the feed inlet and the slag discharge outlet.

[0017] Furthermore, a discharge port is provided at the bottom of the storage bin.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The sludge grinding filter of the present invention is easy to process and maintain, has low energy consumption, realizes automatic filtering operation, has a good grinding and filtering effect on impurities present in the sludge, provides good guarantee for the subsequent thermal hydrolysis process of sludge deep treatment, and greatly prolongs the service life and work efficiency of the entire process flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A schematic diagram of a sludge grinding filter according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a grinding piece according to an embodiment of the present invention;

[0023] Figure 3 A side view of the filter assembly according to an embodiment of the present invention;

[0024] Figure 4 A top view of the filter assembly according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of a transmission gear according to an embodiment of the present invention;

[0026] Figure 6 Schematic diagram of a guide plate according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. Grinding motor; 2. Horizontal grinding rotation mechanism; 3. Vertical limit frame; 4. Cylinder; 5. Rotating shaft; 6. Slag discharge port; 7. Filter element; 8. Filter assembly; 9. Grinding element; 10. Storage bin; 11. Discharge port; 12. Feed port; 13. Feed pump; 14. Sewage tank; 15. Cutting head; 16. Limit slot; 17. Guide strip; 18. Transmission gear; 19. Guide slot; 20. Guide plate; 21. Bearing; 22. Support frame. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0033] like Figure 1-6 As shown, a sludge grinding filter includes a horizontal grinding rotation mechanism, a vertical limit frame, a rotating shaft, a filter element and a grinding element. One end of the rotating shaft passes through the horizontal grinding rotation mechanism and the vertical limit frame in sequence and is connected to the grinding element. The filter element is located on the outside of the grinding element and cooperates with the grinding element.

[0034] The grinding piece is in an inverted cone structure, and the surface of the grinding piece is provided with a spiral dirt receiving groove, and the surface of the filter is provided with a plurality of filter components, and the filter components cooperate with the dirt receiving groove, and a storage bin is arranged below the filter. The filter is an inverted cone structure without a cap, and the surface cooperates with the grinding piece. The filter component includes a cutting head and a limiting groove, and the cutting head is an arc structure, the top of the cutting head is located above the filter, and the bottom is connected to the surface of the filter, the top of the limiting groove is connected to the surface of the filter, and the bottom is located below the surface of the filter. The bottom of the limiting groove is located below the top of the cutting head, and a hollow structure is formed between the bottom of the cutting head and the bottom of the limiting groove, and the hollow structure is connected to the storage bin; the aperture of the hollow structure is 5mm. The hollow structure can be used as a cutting hole, which can intercept impurities with a diameter greater than 5mm, and can cut and crush the impurities under the action of external force.

[0035] The vertical limit frame is provided with a bearing inside, the rotating shaft is connected to the bearing, the filter is also provided with a support frame, a cylinder is provided between the crossbeam of the support frame and the vertical limit frame, and the crossbeam is located above the grinding piece. The cylinder drives the rotating shaft to rise and fall through the vertical limit frame, the rotating shaft is fixedly connected to the inner side of the bearing, and the rise and fall of the rotating shaft does not affect its rotation.

[0036] A transmission gear is provided on the inner side of the horizontal grinding rotating mechanism, and the transmission gear cooperates with the grinding motor. A guide groove is provided on the inner side of the transmission gear, and a guide bar is provided on the outer side of the upper part of the rotating shaft. The transmission gear is sleeved on the rotating shaft, and the guide groove cooperates with the guide bar. The transmission gear and the grinding motor are conventionally connected through gear meshing. The cooperation of the guide groove and the guide bar realizes the independence of the lifting and rotating of the rotating shaft. The grinding motor drives the grinding element to rotate forward and reversely. When rotating counterclockwise, large particles of impurities are pushed to the cutting holes on the filter element, and the large particles of impurities are broken into small particles and pass through the filter element. When rotating clockwise, large particles of impurities move along the dirt receiving groove to the upper part of the filter element under the action of tangential stress and friction of the filter plate, and the debris that cannot be cut and broken is taken away from the surface of the filter element, so as to clean the filter element.

[0037] The bottom of the filter element is provided with a feed port, and the feed port is connected to a feed pump. The top of the filter element is provided with a slag discharge port, and the top of the grinding element is provided with a guide plate, and the guide plate is located on one side of the slag discharge port. Valves are provided at the feed port and the slag discharge port. The bottom of the storage bin is provided with a discharge port.

[0038] Implementation process:

[0039] The filter element is a cone made of steel plate. A cutting hole formed by a cutting bit and a limit groove is processed on the filter element. The optimal aperture of the cutting hole is 5mm, and the aperture on the side close to the grinding element is slightly smaller, and the aperture on the side close to the storage bin is slightly larger. This structure is more conducive to the ground impurities passing through the cutting hole without causing jamming.

[0040] The arc-shaped cutting head is tilted toward one side of the grinding piece. The optimal tilt angle of the cutting head should be 30 degrees with the filter element, and the tilt angle formed by the edge of the dirt receiving groove and the tangent of the grinding piece is 60 degrees. When the grinding piece is lowered by the action of the cylinder, the optimal distance between the grinding piece and the filter element is 7.5mm. At this time, when the grinding piece rotates forward, the thrust formed by the extrusion of the dirt receiving groove will completely act on the cutting head through the impurities. At this time, the angle forms the best cutting and grinding effect. At this time, the optimal structure of the filter assembly composed of the cutting head and the limit groove is an arc with a radius of 2.5mm, with the center of the circle falling on the filter element. This structure is conducive to a small amount of hard and difficult to cut impurities with a diameter of more than 5mm to be retained in the dirt receiving groove.

[0041] The grinding piece is a cone with a wide top and a pointed bottom. The grinder is machined with a dirt trough, which is attached to the spiral line of the grinding piece and tilted. The optimal pitch of the spiral line of the dirt trough is 10 cm, and the optimal tilt angle with the horizontal plane is 45 degrees. At this time, the rotation of the dirt trough squeezes the sludge and impurities, mainly in the horizontal direction, and at the same time pushes the impurities along the tangent direction of the dirt trough to the cutting head, cutting and grinding the impurities into fragments. When the grinding piece rotates counterclockwise, the impurities are squeezed to the cone tip area of ​​the grinding piece, and it has a good grinding and multiple crushing effect. Impurities that are difficult to grind and crush are retained in the dirt trough. When the grinding piece rotates clockwise, the impurities are gradually lifted to the top of the grinder along the dirt trough and discharged through the slag discharge port.

[0042] A guide plate is arranged on the top of the grinding piece. The guide plate has an arc-shaped structure. The inner side of the guide plate is perpendicular to the main shaft, and the outer side of the guide plate forms a 45-degree angle with the tangent direction of the grinding piece. When the grinding piece rotates forward, this structure is helpful to block a small amount of impurities that are not discharged in time.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge grinding filter, characterized in that: It includes a horizontal grinding rotation mechanism, a vertical limit frame, a rotating shaft, a filter element and a grinding element. One end of the rotating shaft passes through the horizontal grinding rotation mechanism and the vertical limit frame in sequence and is connected to the grinding element. The filter element is located on the outside of the grinding element and cooperates with the grinding element.

2. The sludge grinding filter according to claim 1, characterized in that: The grinding piece is in an inverted cone structure, the surface of the grinding piece is provided with a spiral dirt receiving groove, the surface of the filter element is provided with a plurality of filter components, the filter components cooperate with the dirt receiving groove, and a storage bin is provided below the filter element.

3. The sludge grinding filter according to claim 2, characterized in that: The filter assembly includes a cutting head and a limiting groove. The cutting head is an arc-shaped structure. The top of the cutting head is located above the filter element, and the bottom is connected to the surface of the filter element. The top of the limiting groove is connected to the surface of the filter element, and the bottom is located below the surface of the filter element.

4. The sludge grinding filter according to claim 3, characterized in that: The bottom of the limiting groove is located below the top of the cutting bit, and a hollow structure is formed between the bottom of the cutting bit and the bottom of the limiting groove, and the hollow structure is connected to the storage bin; the aperture of the hollow structure is 1-10mm.

5. The sludge grinding filter according to claim 1, characterized in that: The vertical limit frame is provided with a bearing inside, the rotating shaft is connected to the bearing, the filter is also provided with a support frame, a cylinder is provided between the crossbeam of the support frame and the vertical limit frame, and the crossbeam is located above the grinding piece.

6. The sludge grinding filter according to claim 1, characterized in that: A transmission gear is arranged on the inner side of the horizontal grinding rotation mechanism, the transmission gear cooperates with the grinding motor, a guide groove is arranged on the inner side of the transmission gear, a guide strip is arranged on the outer side of the upper part of the rotating shaft, the transmission gear is sleeved on the rotating shaft, and the guide groove cooperates with the guide strip.

7. The sludge grinding filter according to claim 1, characterized in that: A feed inlet is arranged at the bottom of the filter element, and the feed inlet is connected to a feed pump.

8. The sludge grinding filter according to claim 7, characterized in that: The top of the filter element is provided with a slag discharge port, the top of the grinding element is provided with a guide plate, and the guide plate is located at one side of the slag discharge port.

9. The sludge grinding filter according to claim 8, characterized in that: The feed port and the slag discharge port are both provided with valves.

10. The sludge grinding filter according to claim 2, characterized in that: The bottom of the storage bin is provided with a discharge port.

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