An eccentric squirrel cage pulverizer

Abstract

The utility model discloses an eccentric squirrel cage pulverizer, especially suitable for sludge pulverization in sewage treatment plant. It comprises a pulverizing chamber and an eccentric rotating mechanism. The pulverizing chamber is provided with an inlet and an outlet. The eccentric rotating mechanism comprises a rotating shaft, a mounting seat and a detachable rack. The inlet is located above the rotating mechanism, and the material falling direction is perpendicular to the rotating axis and deviates from the rotating direction. The rotating axis is eccentric to the center of the pulverizing chamber. The eccentric rotating mechanism is made of wear-resistant and corrosion-resistant material. The outer edge of the rotating track is tangent to the inner wall of the pulverizing chamber at the outlet, forming a crescent-shaped pulverizing space. The utility model realizes all-around and dead-angle-free pulverization of sludge, uniform feeding, replacement of the rack for different processes, wear resistance and corrosion resistance, prolonging the service life and ensuring the clean and safe production environment.

Description

Technical Field

[0001] This utility model relates to the field of waste treatment equipment technology, specifically to an eccentric rat cage crusher for treating solid or semi-solid waste such as sludge. Background Technology

[0002] In industrial production, agricultural processing, and wastewater treatment, various materials often need to be crushed to meet the requirements of subsequent processes. In wastewater treatment plants, the sludge produced after treatment contains a large amount of organic matter, microorganisms, and some impurities. If the sludge is to be further utilized for resource recovery (such as making fertilizer or fuel) or safely disposed of, crushing is an important preliminary step.

[0003] There are many types of existing crushing equipment, such as hammer mills, jaw mills, and cage mills. Among them, cage mills are used in some material crushing applications due to their simple structure and high crushing efficiency. However, traditional cage mills have significant shortcomings when treating sludge from wastewater treatment plants. On the one hand, wastewater treatment plant sludge is characterized by high moisture content, high viscosity, and may contain corrosive substances. The rotating mechanism of traditional cage mills is often made of ordinary materials with poor wear and corrosion resistance, making it prone to damage, resulting in short equipment lifespan and high maintenance costs. On the other hand, their rotating mechanism is mostly designed with central symmetry, which can easily lead to material accumulation and crushing dead zones during the crushing of highly viscous sludge, resulting in uneven and insufficient crushing of the sludge and affecting subsequent treatment effects. In addition, the internal racks of traditional cage mills are mostly fixed and cannot be replaced according to different sludge compositions and crushing particle size requirements, resulting in a narrow range of applications. Furthermore, the unreasonable feeding structure design can easily lead to problems such as poor feeding or uneven material distribution.

[0004] Therefore, in response to the specific needs of sludge treatment in sewage treatment plants, there is an urgent need for a new type of eccentric squirrel cage crusher to improve the uniformity and thoroughness of sludge crushing, enhance the wear resistance and corrosion resistance of the equipment, optimize the feeding structure, extend the service life, and expand the applicability of the equipment in the field of sludge treatment. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide an eccentric cage crusher. This crusher is particularly suitable for sludge produced after sewage treatment plants. It can achieve all-round crushing of sludge without dead angles, improve the crushing effect, and is suitable for different sludge treatment process requirements, with a long service life.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] This utility model discloses an eccentric squirrel cage crusher, including a crushing chamber and an eccentric rotating mechanism disposed within the crushing chamber. The crushing chamber has a feed inlet and a discharge outlet. The eccentric rotating mechanism includes a rotating shaft, mounting seats evenly distributed around the rotating shaft, and a detachable rack fixed to the mounting seat. The feed inlet is located above the eccentric rotating mechanism, with its material discharge direction perpendicular to the eccentric rotating mechanism and located in a region where the rotation axis is biased towards the rotation direction of the eccentric rotating mechanism. The rotation axis of the eccentric rotating mechanism is eccentric to the center of the crushing chamber and is biased in the opposite direction towards the material discharge direction, located in a region where the rotation axis is biased towards the rotation direction of the eccentric rotating mechanism.

[0008] Furthermore, the eccentric rotating mechanism is made of wear-resistant and corrosion-resistant materials. These materials are stainless steel or ceramic. Stainless steel has good wear resistance, corrosion resistance, and strength, meeting the pulverization requirements of sludge in general wastewater treatment plants; ceramic materials have even higher wear resistance and corrosion resistance, making them suitable for conditions where the sludge contains high levels of corrosive substances.

[0009] Furthermore, the tooth shape of the rack is triangular, square, or circular arc.

[0010] The rack can be detachably fixed via the mounting base, and comes in different specifications and tooth shapes (triangular teeth, square teeth, or arc teeth). The rack can be replaced according to the different composition, viscosity, and process requirements of the sludge in the sewage treatment plant, thus expanding the applicability of the equipment in the field of sludge treatment.

[0011] Furthermore, the rack rotates with the eccentric rotating mechanism, and the circular rotation trajectory of its outer edge is tangent to the inner wall of the crushing chamber, with the tangent point located at the discharge port, thereby forming a crescent-shaped crushing space within the crushing chamber.

[0012] The beneficial effects of this utility model are:

[0013] The eccentric rotating mechanism of this invention has its rotation axis eccentrically set with the center of the crushing chamber. Combined with the feed inlet at a specific position and the crescent-shaped crushing space, it can crush the sludge from the sewage treatment plant in all directions without dead angles when rotating at high speed. This can effectively solve the problem of sludge accumulation caused by high viscosity, improve the uniformity and thoroughness of sludge crushing, and achieve good crushing effect, laying a good foundation for the subsequent resource utilization or disposal of sludge.

[0014] The material feeding direction is perpendicular to the eccentric rotating mechanism and located in a specific area, which makes the sludge feeding more uniform and allows it to better contact the rotating mechanism. At the same time, the rotation trajectory of the rack is tangent to the inner wall of the crushing chamber, forming a crescent-shaped crushing space, which optimizes the crushing environment and improves crushing efficiency and effect. The structure is simple and easy to operate. The setting of the crushing chamber can effectively prevent sludge from splashing during the crushing process, avoid pollution to the production environment, and ensure the cleanliness and safety of the wastewater treatment plant's production environment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the eccentric rat cage crusher of this utility model;

[0016] Figure 2 This is a schematic diagram of the eccentric rotating mechanism of the eccentric squirrel cage crusher of this utility model;

[0017] Figure 3 yes Figure 1 The left view;

[0018] Figure 4 This is a schematic diagram of the triangular teeth of the eccentric squirrel cage crusher of this utility model;

[0019] Figure 5 This is a schematic diagram of the square teeth of the eccentric rat cage crusher of this utility model;

[0020] Figure 6 This is a schematic diagram of the arc teeth of the eccentric squirrel cage crusher of this utility model. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0022] Please see Figures 1 to 6 This embodiment of the eccentric squirrel cage crusher includes a crushing chamber 1 and an eccentric rotating mechanism 2 disposed within the crushing chamber 1. The crushing chamber 1 is provided with a feed inlet 3 and a discharge outlet 4. The eccentric rotating mechanism 2 includes a rotating shaft, mounting seats 6 evenly distributed around the rotating shaft 5, and a rack 7 detachably fixed to the mounting seat 6. The feed inlet 3 is located above the eccentric rotating mechanism 2, and its material discharge direction is perpendicular to the eccentric rotating mechanism 2, and it is located in a region 8 where the rotation axis is biased towards the rotation direction of the eccentric rotating mechanism 2. The rotation axis of the eccentric rotating mechanism 2 is eccentric to the center of the crushing chamber 1 and is biased in the opposite direction to the material discharge direction, which is located in a region where the rotation axis is biased towards the rotation direction of the eccentric rotating mechanism.

[0023] The eccentric rotating mechanism 2 is made of wear-resistant and corrosion-resistant materials, such as stainless steel or ceramic materials. Stainless steel has good wear resistance, corrosion resistance and strength, which can meet the crushing needs of sludge in general sewage treatment plants. Ceramic materials have higher wear resistance and corrosion resistance, and are suitable for working conditions with high content of corrosive substances in sludge.

[0024] The rack 7 has triangular teeth 9, square teeth 10, or circular arc teeth 11. The rack is detachably fixed via the mounting base 6 and comes in different specifications and tooth shapes. This allows for the replacement of the rack according to the different compositions, viscosity, and process requirements of the sludge from the wastewater treatment plant, thus expanding the equipment's applicability in the sludge treatment field. The rack 7 rotates with the eccentric rotating mechanism 2, and its outer circular rotation trajectory is tangent to the inner wall of the crushing chamber 1, with the tangent point located at the discharge port 4, thereby forming a crescent-shaped crushing space 12 within the crushing chamber 1.

[0025] Triangular teeth 9 are suitable for materials with smaller particles; square teeth 10 and arc teeth 11 are suitable for materials with fixed specifications, such as materials with a diameter of 5mm or 8mm.

[0026] In use, based on the composition, viscosity, and subsequent process requirements of the sludge to be crushed in the wastewater treatment plant, a rack 7 of suitable specifications and tooth shape is fixed to the eccentric rotating mechanism 2 via a mounting base. The sludge is added into the crushing chamber 1 through the feed inlet 3. Under its own gravity, the sludge falls perpendicular to the eccentric rotating mechanism 2, entering the area where the rotation axis is biased towards the rotation direction of the eccentric rotating mechanism 2. The eccentric rotating mechanism 2 is started and rotated at high speed. Because the rotation axis is eccentrically set to the center of the crushing chamber 1 and biased in the opposite direction towards the material falling area, the rack rotates with the eccentric rotating mechanism 2. Its outer rotation trajectory forms a tangent point with the inner wall of the crushing chamber 1 at the discharge outlet 4, forming a crescent-shaped crushing space 12. During high-speed rotation, the rack 7 strikes the sludge in all directions within this space, achieving comprehensive crushing of the sludge without dead angles and effectively breaking up the sludge's agglomerated structure. After crushing, the eccentric rotating mechanism 2 is turned off, and the crushed sludge is discharged from the discharge outlet 4 for further processing. When dealing with sludge of different properties, simply remove the original rack 7 from the mounting base 6 and replace it with a rack 7 of the appropriate specifications and tooth shape.

[0027] The eccentric squirrel cage crusher provided in the embodiments of this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the technical solution disclosed in this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An eccentric rat cage crusher, characterized in that: The device includes a crushing chamber and an eccentric rotating mechanism disposed within the crushing chamber. The crushing chamber has a feed inlet and a discharge outlet. The eccentric rotating mechanism includes a rotating shaft, mounting seats evenly distributed around the rotating shaft, and a rack detachably fixed to the mounting seats. The feed inlet is located above the eccentric rotating mechanism, with its material discharge direction perpendicular to the eccentric rotating mechanism and situated in a region where the rotation axis is biased towards the rotation direction of the eccentric rotating mechanism. The rotation axis of the eccentric rotating mechanism is eccentric to the center of the crushing chamber and biased in the opposite direction towards the material discharge direction, situated in a region where the rotation axis is biased towards the rotation direction of the eccentric rotating mechanism.

2. The eccentric squirrel cage crusher according to claim 1, characterized in that: The eccentric rotating mechanism is made of wear-resistant and corrosion-resistant materials.

3. The eccentric rat cage crusher according to claim 1, characterized in that: The tooth shape of the rack is triangular, square, or circular.

4. The eccentric rat cage crusher according to claim 1, characterized in that: The rack rotates with the eccentric rotating mechanism, and the circular rotation trajectory of its outer edge is tangent to the inner wall of the crushing chamber, with the tangent point located at the discharge port, thereby forming a crescent-shaped crushing space inside the crushing chamber.

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