Desanding device for kitchen waste treatment
By installing baffles and toothed rake agitators in the sand removal device, the problem of fine sand and gravel being difficult to settle is solved, the wear of downstream equipment is reduced, and a highly efficient sand removal effect is achieved.
Patent Information
- Application Number
- CN202423155817.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing sand removal devices are ineffective in settling fine sand and gravel in food waste treatment, resulting in high sand content in the material and increased wear on downstream equipment.
A baffle is installed at the hopper inlet to block the material flow, and a toothed rake agitator is used to stir the material to prevent the settled particles from being stirred up. The settled particles are then transported by a screw conveyor.
It improves the settling rate of fine sand and gravel, reduces wear on downstream equipment, and ensures the effectiveness of the sand removal process.
Smart Images
Figure CN223761179U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of kitchen waste treatment technology, and in particular relates to a sand removal device for kitchen waste treatment. Background Technology
[0002] Food waste treatment generally includes pretreatment and anaerobic digestion or incineration and landfill disposal. Currently, the mainstream pretreatment process for food waste is bag breaking, sorting, impurity removal, oil-water separation, and harmless treatment. The impurity removal process includes a sand removal step. The sand removal step uses a sand removal device to remove hard debris such as sand, bones, and metal from the food waste slurry.
[0003] Existing sand removal devices generally work on the principle of suspension and settling. A mixer continuously agitates the slurry, suspending the particles. Denser particles such as sand, bones, and metal settle under gravity and are carried away by a screw conveyor at the bottom, while the biomass slurry overflows from the outlet. However, some material flows directly from the inlet to the outlet, making it difficult for fine sand to settle. Food waste slurry is generally quite viscous and requires constant agitation. Existing mixers easily stir up sand that has already settled to the bottom, causing it to flow out with the material from the outlet. This results in a high sand content in the material entering downstream processes, exacerbating wear and tear on downstream equipment. Utility Model Content
[0004] The purpose of this invention is to provide a sand removal device for kitchen waste treatment to solve the above-mentioned technical problems.
[0005] To achieve the above objectives, the specific technical solution of the sand removal device for kitchen waste treatment according to this utility model is as follows:
[0006] A sand removal device for treating kitchen waste includes a hopper and a mixer. The hopper has an inlet and an outlet, with the outlet slightly higher than the inlet. The device is characterized by a baffle installed at the inlet of the hopper to block material, allowing it to enter the hopper obliquely downwards from the inlet. The mixer is installed at the top of the hopper, extending into the hopper to agitate the material. The mixer has a rake-type structure.
[0007] Furthermore, the hopper is in the shape of an inverted pyramid.
[0008] Furthermore, the baffle includes a flat plate and two side plates. The two side plates are fixed on both sides of the flat plate and are perpendicular to the flat plate. The flat plate is aligned with the feed inlet and serves to block the material. The side plates further prevent the material from being diverted from the side.
[0009] Furthermore, the mixer includes a stirring motor, a stirring main shaft, and a stirring part. The stirring motor is fixedly installed above the hopper, the stirring main shaft is fixedly connected to the output end of the stirring motor and passes into the hopper, and the stirring part is fixedly installed at the end of the stirring main shaft.
[0010] Furthermore, the stirring unit includes a stirring body and multiple toothed rakes. The stirring body is fixedly connected to the stirring main shaft in the middle, and the multiple toothed rakes are fixedly installed on the stirring body.
[0011] Furthermore, the rakes have gaps between them, and multiple rakes are distributed at equal intervals.
[0012] Furthermore, the mixing body is fixedly connected to the mixing spindle by screws in the middle.
[0013] Furthermore, the mixer speed is 12 r / min.
[0014] Furthermore, it also includes a screw conveyor, which is installed at the bottom of the hopper and tilts upward from the bottom of the hopper to convey settling particles.
[0015] Furthermore, the screw conveyor tilts upwards from the bottom of the hopper.
[0016] The sand removal device for kitchen waste treatment of this utility model has the following advantages: (1) The hopper of this device has added baffles to prevent short flow at the inlet and outlet, which would cause the material to flow out directly, and is conducive to the rapid settling of denser sand, gravel, bones, metal and other materials.
[0017] (2) The agitator of this device is a toothed rake type, which will not stir up the settled sand and gravel.
[0018] (3) The agitator of this device is a toothed rake type, which is beneficial for removing particles such as shells and fine sand attached to the floating objects;
[0019] The sand removal device for food waste treatment provided by this utility model solves the problem of high sand content in the material entering the downstream process during the sand removal process of food waste treatment, which aggravates the wear of downstream equipment, by adding a baffle in the hopper to prevent short flow at the inlet and outlet and designing the agitator as a toothed rake. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the sand removal device for treating kitchen waste according to this utility model;
[0021] Figure 2 This is a top view of the sand removal device for treating kitchen waste according to this utility model;
[0022] Figure 3This is a top view of the inner baffle structure of the hopper of this utility model;
[0023] Figure 4 This is a top view of the stirrer structure of this utility model;
[0024] The markings in the diagram are as follows: 1. Hopper; 11. Fixed support; 12. Feed inlet; 13. Discharge outlet; 2. Screw conveyor; 14. Baffle; 141. Flat plate; 142. Side plate; 3. Agitator; 31. Agitator motor; 32. Agitator main shaft; 33. Agitator section; 331. Agitator body; 332. Toothed rake. Detailed Implementation
[0025] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a sand removal device for treating kitchen waste.
[0026] like Figure 1-4 As shown, this utility model discloses a sand removal device for treating kitchen waste, comprising a hopper 1, a screw conveyor 2, and a mixer 3. The hopper 1 is in the shape of an inverted pyramid and is fixedly installed on the ground by a fixing bracket 11. The hopper 1 has an inlet 12 and an outlet 13, with the outlet 13 slightly higher than the inlet 12 to allow suspended solids to overflow. A baffle 14 is installed at the inlet 12 of the hopper 1 to block the material, allowing it to enter the hopper 1 at an angle downwards from the inlet 12, preventing short-circuiting. The screw conveyor 2 is installed at the bottom of the hopper 1, tilting upwards from the bottom, and is used to transport settled particles. The mixer 3 is installed at the top of the hopper 11, extending into the hopper 1, and is used to agitate the material. Unlike existing paddle or frame mixers, the mixer 3 has a rake-type structure. The rake-type structure does not stir up settled sand and gravel, which is beneficial for removing shells, fine sand, and other particles attached to floating debris.
[0027] The baffle 14 includes a flat plate 141 and two side plates 142. The two side plates 142 are fixed on both sides of the flat plate 141 and are perpendicular to the flat plate 141. The flat plate 141 is aligned with the feed inlet 12 and serves to block the material. The side plates 142 on both sides can further prevent the material from flowing from the side. The structure of the baffle 14 helps to block the material that has just entered the hopper 1, prevent some material from flowing directly from the feed inlet 12 to the discharge outlet 13, and improve the settling rate of some fine sand and gravel.
[0028] like Figure 4As shown, the mixer 3 includes a mixing motor 31, a mixing main shaft 32, and a mixing part 33. The mixing motor 31 is fixedly installed above the hopper 1. The mixing main shaft 32 is fixedly connected to the output end of the mixing motor 31 and passes into the hopper 1. The mixing part 33 is fixedly installed at the end of the mixing main shaft 32 by fasteners such as screws. The mixing part 33 includes a mixing body 331 and multiple rakes 332. The mixing body 331 is fixedly connected to the mixing main shaft 32 in the middle by fasteners. The multiple rakes 332 are fixedly installed on the mixing body 331. There are gaps between the rakes 332, and the multiple rakes 332 are evenly distributed.
[0029] After the material enters the hopper 1, the agitator 3 continuously stirs the slurry. High-density particles such as sand, gravel, bones, and metal will settle to the bottom of the hopper 1 and be sent out by the screw conveyor 2. The agitator 3 rotates at 12 r / min. Its slow rotation speed and its toothed structure can gently stir the upper layer of slurry in the hopper. At the same time, it can also stir and remove shells, fine sand and gravel attached to the floating objects, allowing them to settle further. Meanwhile, materials with lower density, such as oil and biomass, overflow from the discharge port and enter the downstream process.
[0030] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A sand removing device for kitchen waste treatment, comprising a hopper (1) and a mixer, the hopper (1) is provided with a feeding port (12) and a discharging port (13), the discharging port (13) is slightly higher than the feeding port (12), characterized in that, The hopper (1) is provided with a baffle (14) at the inlet (12) of the hopper (1) to block the material and make the material enter the hopper (1) obliquely downward from the inlet (12).
2. The sand removing device for kitchen waste treatment according to claim 1, characterized in that, The hopper (1) is in the shape of an inverted pyramid.
3. The sand removing device for kitchen waste treatment according to claim 1, characterized in that, The baffle (14) comprises a flat plate (141) and two side plates (142) fixed on both sides of the flat plate (141) and perpendicular to the flat plate (141), the flat plate (141) is aligned with the inlet (12) to block the material, and the two side plates (142) further block the material from flowing out from the sides.
4. The sand removing device for kitchen waste treatment according to claim 1, characterized in that, The mixer comprises a stirring motor (31), a stirring main shaft (32) and a stirring part (33), the stirring motor (31) is fixedly installed above the hopper (1), the stirring main shaft (32) is fixedly connected with the output end of the stirring motor (31) and penetrates into the hopper (1), and the stirring part (33) is fixedly installed at the end of the stirring main shaft (32).
5. The sand removing device for kitchen waste treatment according to claim 4, characterized in that, The stirring part (33) comprises a stirring main body (331) and a plurality of tooth rakes (332), the stirring main body (331) is fixedly connected with the stirring main shaft (32) in the middle, and the plurality of tooth rakes (332) are fixedly installed on the stirring main body (331).
6. The sand removing device for kitchen waste treatment according to claim 5, characterized in that, The tooth rakes (332) have gaps therebetween, and the plurality of tooth rakes (332) are distributed at equal intervals.
7. The sand removing device for kitchen waste treatment according to claim 5, characterized in that, The stirring main body (331) is fixedly connected with the stirring main shaft (32) in the middle by screws.
8. The sand removing device for kitchen waste treatment according to claim 1, characterized in that, The rotating speed of the mixer is 12 r / min.
9. The sand removing device for kitchen waste treatment according to claim 1, characterized in that, The screw conveyor (2) is further provided, which is installed at the bottom of the hopper (1) and is inclined upward from the bottom of the hopper (1) to convey the settled particles.
10. The sand removing device for kitchen waste treatment according to claim 9, characterized in that, The screw conveyor (2) is inclined upward from the bottom of the hopper (1).