Coarse filtering temporary storage bin
By designing a coarse filter buffer chamber, the problem of powder and washing liquid clogging the centrifugal dewatering machine after hot washing of waste plastics was solved, achieving efficient material separation and impurity removal, and improving the dewatering efficiency and quality of plastics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU WOTET MACHINERY CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-28
AI Technical Summary
In existing technologies, waste plastics after hot washing contain impurities such as cleaning fluid and powder, which can easily clog the filter holes of centrifugal dewatering machines, affecting dewatering efficiency and plastic quality.
A coarse filtration buffer chamber was designed, including a buffer chamber body and a filter cavity. The material is separated from the cleaning liquid and powder through the filter holes. The material is conveyed and impurities are removed by a conveying screw and a slag-removing screw structure.
It effectively filters out about 80% of the powder and about 85% of the cleaning liquid in the material, improving the subsequent dehydration efficiency and plastic quality. It has a compact structure, is easy to operate, and consumes little energy.
Smart Images
Figure CN224170214U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste plastic recycling technology, and in particular to a coarse filter buffer. Background Technology
[0002] In waste plastic recycling production lines, waste plastics such as bottles and shells undergo multiple processes including sorting, crushing, washing, dehydration, air separation, and bagging. Among these processes, washing is a crucial step, and its effectiveness significantly impacts the quality of the plastics produced.
[0003] The cleaning process is divided into pre-cleaning and hot washing. First, the crushed waste plastic is pre-cleaned to remove impurities such as dust, dirt, and sand from its surface. Then, the waste plastic is hot-washed by adding an appropriate amount of hot water and detergent. For ease of description, the mixture of hot water and detergent is called the cleaning solution. The cleaning solution is heated to a certain temperature and maintained for a period of time while being stirred to further remove stubborn stains and residues from the surface of the waste plastic.
[0004] However, the waste plastics output after hot washing contain cleaning liquid and powder and other impurities. The presence of powder and other impurities will affect the subsequent dehydration efficiency and effect, and thus affect the quality of the plastics produced later. Therefore, it is necessary to develop a coarse filtration device that can first separate water and powder from the waste plastics after hot washing. After passing through the coarse filtration device, the plastics can be sent to the subsequent dehydrator for dehydration, thereby improving the dehydration efficiency and effect. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a coarse filtration buffer chamber that is compact in structure, easy to operate, and capable of coarsely filtering waste plastics after hot washing. The coarse filtration buffer chamber can filter out about 80% of powder and other impurities.
[0006] For ease of description, the waste plastics output after hot washing are collectively referred to as materials. Currently, in waste plastic recycling production lines, the materials after hot washing are usually sent to centrifugal dewatering machines for dehydration. However, the materials after hot washing not only contain washing liquid but also impurities such as powder. The presence of powder and other impurities can easily clog the filter holes on the centrifugal dewatering machine, affecting the dehydration efficiency and effect of the centrifugal dewatering machine, and thus affecting the quality of the plastics produced subsequently. To address this problem, this utility model designs a coarse filtration buffer chamber for coarse filtration of the materials after hot washing, filtering out about 80% of the powder and other impurities in the materials.
[0007] The technical solution adopted by this utility model is as follows: a coarse filter buffer chamber includes a buffer chamber body; the buffer chamber body has a buffer cavity and a filter cavity, the filter cavity is located below the buffer cavity, and the buffer cavity is connected to the filter cavity through a plurality of filter holes. Both the buffer cavity and the filter cavity are horizontally arranged closed long channel structures.
[0008] A feed inlet communicating with the buffer cavity is provided at the top of the buffer chamber, and a discharge outlet communicating with the buffer cavity is provided at the bottom of the buffer chamber. A discharge valve is installed at the discharge outlet. A feeding device is provided in the buffer cavity to send the material entering from the feed inlet to the discharge outlet.
[0009] A slag removal port communicating with the filter cavity is provided at the bottom of the buffer chamber, and a slag removal valve is installed at the slag removal port; a slag removal device is provided in the filter cavity to remove slag from the filter cavity, and the slag removal device can remove powder and other impurities that enter the filter cavity through each filter hole.
[0010] During operation, materials containing powder and other impurities, as well as cleaning fluid, are fed into the buffer cavity through the feed inlet. The presence of each filter hole allows the cleaning fluid and powder and other impurities in the buffer cavity to enter the filter cavity through each filter hole, where they are separated from the materials located in the buffer cavity, thus achieving the purpose of coarse filtration.
[0011] There are various structural forms of feeding devices. Considering the characteristics of the crushed waste plastic, i.e., plastic sheets, this solution selects a conveyor belt that causes less damage to the plastic sheets and has less resistance. The specific structure is as follows: The feeding device includes a rotating shaft, which is horizontally supported in the buffer cavity by a first bearing group. The rotating shaft is driven to rotate by a first driving device. The conveyor belt is set on the rotating shaft by several support rods, and the rotation direction of the conveyor belt allows the material entering from the feed port to be conveyed out from the discharge port during the rotation of the rotating shaft.
[0012] Furthermore, in the aforementioned coarse filter buffer chamber, the inlet is located at the top center of the buffer cavity, and the outlet is located at the bottom left or bottom right of the buffer cavity.
[0013] The first bearing assembly includes a left bearing assembly fixedly disposed at the left end of the buffer compartment and a right bearing assembly fixedly disposed at the right end of the buffer compartment. The left end of the rotating shaft passes through the left through hole on the left end of the buffer compartment and is supported in the bearing in the left bearing assembly. The right end of the rotating shaft passes through the right through hole on the right end of the buffer compartment and is supported in the bearing in the right bearing assembly.
[0014] The first driving device is a first drive motor mounted on a mounting base, and the output shaft of the first drive motor is fixedly connected to one end of the rotating shaft extending out of the first bearing assembly via a coupling.
[0015] There are various structural forms of slag removal devices. Considering comprehensive factors such as slag removal efficiency and effect, energy consumption, etc., this solution selects a screw structure. The specific structure is as follows: The structure of the slag removal device includes: a slag removal screw, which is horizontally supported in the filter cavity by a second bearing group, and the slag removal screw is driven to rotate by a second drive device.
[0016] The spiral blades from the left end to the center of the slag-cleaning screw are continuous first spiral blades, and the spiral blades from the right end to the center of the slag-cleaning screw are continuous second spiral blades. The slag-cleaning port is located below the section between the first and second spiral blades.
[0017] The first spiral blade rotates in the opposite direction to the second spiral blade, and when the cleaning screw is driven to rotate by the second drive device, it can gather the impurities accumulated in the filter cavity from the left and right sides toward the central cleaning port and discharge them.
[0018] The second drive device is a second drive motor mounted on the mounting base. The output shaft of the second drive motor is fixedly connected to the input shaft of the chain drive, and the output shaft of the chain drive is fixedly connected to one end of the slag cleaning screw.
[0019] The first drive motor in the first drive unit and the second drive motor in the second drive unit are typically geared motors.
[0020] Furthermore, in the aforementioned coarse filter buffer chamber, the filter holes are preferably round holes; a more preferred option is that all filter holes are of the same size and are evenly spaced from the left end to the right end of the filter cavity. The optimal size of the filter holes is selected based on the following parameters: the diameter of the filter holes is φ1.5~φ3mm.
[0021] Furthermore, in the aforementioned coarse filter buffer chamber, a vent is provided at the top of the buffer chamber body that communicates with the buffer cavity, and the number of vents is at least one; in this solution, the number of vents is two.
[0022] The beneficial effects of this utility model are: the coarse filter buffer chamber has the advantages of compact structure, convenient operation and low energy consumption. It can not only play the role of material buffering and transition, but also filter out about 80% of powder and other impurities and about 85% of cleaning liquid in the material, laying the foundation for subsequent dehydration efficiency and dehydration effect. Attached Figure Description
[0023] Figure 1This is a schematic diagram of the structure of a coarse filter cache bin as described in this utility model.
[0024] Figure 2 yes Figure 1 A magnified schematic diagram of part A in the middle.
[0025] Figure 3 yes Figure 1 A magnified schematic diagram of part B in the middle section.
[0026] Figure 4 This is a schematic diagram of the structure of the rotating shaft and the conveyor belt on it.
[0027] in:
[0028] 1. Buffer chamber; 2. Buffer cavity; 3. Filter cavity; 4. Filter hole; 5. Feed inlet; 6. Discharge outlet; 7. Discharge valve; 8. Rotary shaft; 9. Conveyor belt; 10. Support rod; 11. Left bearing assembly; 12. Right bearing assembly; 13. Mounting base; 14. First drive motor; 15. Coupling; 16. Slag removal port; 17. Slag removal valve; 18. Slag removal screw; 19. First helical blade; 20. Second helical blade; 21. Intermediate segment without helical blade; 22. Second drive motor; 23. Chain drive; 24. Vent. Detailed Implementation
[0029] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, the exemplary embodiments described may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.
[0030] For ease of description, this utility model is based on Figure 1 The left-hand direction shown is defined as "left". Figure 1 The right-hand direction shown is defined as "right," and all directional terms used in this utility model are based on this definition. In the description of this utility model, it should be noted that the terms "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model.
[0031] The coarse-filtering cache bin described in this embodiment, such as Figure 1 and Figure 2As shown, it includes: a cache compartment 1; the cache compartment 1 has a cache cavity 2 and a filter cavity 3, the filter cavity 3 is located below the cache cavity 2, and the cache cavity 2 is connected to the filter cavity 3 through a plurality of filter holes 4.
[0032] like Figure 1 As shown, a feed inlet 5 communicating with the buffer cavity 2 is provided at the top of the buffer chamber 1, and a discharge outlet 6 communicating with the buffer cavity 2 is provided at the bottom of the buffer chamber 1. A discharge valve 7 is installed at the discharge outlet 6. A feeding device is provided in the buffer cavity 2 to send the material entering from the feed inlet 5 to the discharge outlet 6.
[0033] Material containing powder and other impurities, as well as cleaning liquid, output from the hot washing equipment enters the buffer cavity 2 of the buffer chamber 1 through the feed inlet 5. The cleaning liquid and powder and other impurities in the material enter the filter cavity 3 through each filter hole 4, while the material is retained in the buffer cavity 2 and output from the buffer chamber 1 by the feeding device, thereby achieving the purpose of coarse filtration.
[0034] Among these, each filter hole 4 is preferably a round hole; a more preferred option is that each filter hole 4 is of the same size and is evenly spaced from the left end to the right end of the filter cavity 3. The optimal size of the filter hole 4 is selected with the following parameters: the diameter of the filter hole 4 is φ1.5~φ3mm.
[0035] There are various structural forms of feeding devices. Considering the inherent characteristics of the crushed waste plastic, i.e., plastic sheets, this solution selects a conveyor belt that causes less damage to the plastic sheets and also offers less resistance. The specific structure is as follows: Figure 1 and Figure 4 As shown, the structure of the feeding device includes: a rotating shaft 8, which is horizontally supported in the buffer cavity 2 by a first bearing group. The buffer cavity 2 is also a horizontally arranged closed long channel structure. The rotating shaft 8 is driven to rotate by a first driving device. The conveying screw 9 is set on the rotating shaft 8 by several support rods 10, and the rotation direction of the conveying screw 9 allows the material entering from the feed port 5 to be conveyed out from the discharge port 6 through the conveying screw 9 during the rotation of the rotating shaft 8.
[0036] The support rods 10 are evenly spaced along the spiral direction of the conveyor belt 9.
[0037] The rotating shaft 8 can be a hollow shaft structure.
[0038] In this embodiment, the preferred layout of the inlet 5 and outlet 6 is as follows: the inlet 5 is located at the top center of the buffer cavity 2, and the outlet 6 is located at the bottom left or bottom right of the buffer cavity 2. Figure 1As shown, the discharge port 6 is located at the bottom right end of the buffer cavity 2. At this time, the right side of the filter cavity 3 is slightly shorter than the buffer cavity 2 in order to avoid the discharge valve 7.
[0039] The first bearing assembly includes: a left bearing assembly 11 fixedly disposed at the left end of the buffer chamber 1 and a right bearing assembly 12 fixedly disposed at the right end of the buffer chamber 1. The left end of the rotating shaft 8 passes through the left through hole on the left end of the buffer chamber 1 and is supported in the bearing in the left bearing assembly 11. The right end of the rotating shaft 8 passes through the right through hole on the right end of the buffer chamber 1 and is supported in the bearing in the right bearing assembly 12.
[0040] The first driving device is a first drive motor 14 mounted on the mounting base 13, and the output shaft of the first drive motor 14 is fixedly connected to one end of the rotating shaft 8 extending from the first bearing assembly through a coupling 15.
[0041] like Figure 1 and Figure 2 As shown, in this embodiment, a slag removal port 16 communicating with the filter cavity 3 is provided at the bottom of the buffer chamber 1, and a slag removal valve 17 is installed at the slag removal port 16; a slag removal device for cleaning the filter cavity 3 is provided in the filter cavity 3, and the slag removal device can remove powder and other impurities that enter the filter cavity 3 through each filter hole 4 and remove them from the filter cavity 3.
[0042] There are various structural forms of slag removal devices. Considering factors such as slag removal efficiency and effect, energy consumption, etc., this solution selects a screw structure, such as... Figure 1 and Figure 2 As shown, the specific structure is as follows: The structure of the slag cleaning device includes: a slag cleaning screw 18, which is horizontally supported in the filter cavity 3 by a second bearing assembly. The filter cavity 3 is also a horizontally arranged closed long channel structure. The slag cleaning screw 18 is driven to rotate by a second drive device.
[0043] The spiral blades on the slag-cleaning screw 18 are divided into two continuous spiral blades. One section, from the left end of the slag-cleaning screw 18 to the center of the slag-cleaning screw 18, is a continuous first spiral blade 19. The other section, from the right end of the slag-cleaning screw 18 to the center of the slag-cleaning screw 18, is a continuous second spiral blade 20. The slag-cleaning port 16 is located in the section between the first spiral blade 19 and the second spiral blade 20, that is, below the section 21 without spiral blades in the middle.
[0044] The first spiral blade 19 rotates in the opposite direction to the second spiral blade 20, and when the cleaning screw 18 is driven to rotate by the second drive device, it can gather the impurities accumulated in the filter cavity 3 from the left and right sides toward the central cleaning port 16 and discharge them.
[0045] Among them, such as Figure 3 As shown, the second driving device is a second drive motor 22 mounted on the mounting base 13. The output shaft of the second drive motor 22 is fixedly connected to the input shaft of the chain drive 23, and the output shaft of the chain drive 23 is fixedly connected to one end of the slag cleaning screw 18.
[0046] The first drive motor 14 in the first drive device and the second drive motor 22 in the second drive device are typically geared motors.
[0047] In this embodiment, a vent 24 communicating with the cache cavity 2 is provided on the top of the cache compartment 1. The number of vents 24 is at least one, and in this embodiment, the number of vents 24 is two.
[0048] The aforementioned coarse filtration buffer chamber has advantages such as compact structure, convenient operation, and low energy consumption. It can not only serve as a material buffer and transition, but also filter out about 80% of powder and other impurities and about 85% of the cleaning liquid in the material, laying the foundation for subsequent dehydration efficiency and dehydration effect.
[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.
Claims
1. A coarse-filtering cache repository, comprising: A cache compartment; characterized in that: the cache compartment has a cache cavity and a filter cavity, the filter cavity is located below the cache cavity, and the cache cavity is connected to the filter cavity through a plurality of filter holes; A feed inlet communicating with the buffer cavity is provided at the top of the buffer chamber, and a discharge outlet communicating with the buffer cavity is provided at the bottom of the buffer chamber. A discharge valve is installed at the discharge outlet. A feeding device is provided in the buffer cavity to send the material entering from the feed inlet to the discharge outlet. A slag removal port communicating with the filter cavity is provided at the bottom of the buffer chamber, and a slag removal valve is installed at the slag removal port; a slag removal device for cleaning the filter cavity is provided in the filter cavity.
2. The coarse filter cache bin according to claim 1, characterized in that: The feeding device includes a rotating shaft, which is horizontally supported in the buffer cavity by a first bearing assembly and driven to rotate by a first driving device; a conveying screw belt is mounted on the rotating shaft by several support rods, and the direction of rotation of the conveying screw belt allows the material entering from the feed inlet to be conveyed to the discharge outlet during the rotation of the rotating shaft.
3. The coarse filter cache bin according to claim 2, characterized in that: The feed inlet is located at the top center of the buffer cavity, and the discharge outlet is located at the bottom left or bottom right end of the buffer cavity.
4. The coarse filter cache bin according to claim 2, characterized in that: The first bearing assembly includes: a left bearing assembly fixedly disposed at the left end of the buffer compartment body and a right bearing assembly fixedly disposed at the right end of the buffer compartment body. The left end of the rotating shaft passes through the left through hole on the left end of the buffer compartment body and is supported in the bearing in the left bearing assembly. The right end of the rotating shaft passes through the right through hole on the right end of the buffer compartment body and is supported in the bearing in the right bearing assembly. The first driving device is a first drive motor mounted on a mounting base, and the output shaft of the first drive motor is fixedly connected to one end of the rotating shaft extending out of the first bearing assembly via a coupling.
5. A coarse filter buffer according to claim 1, 2, 3, or 4, characterized in that: The structure of the slag removal device includes: a slag removal screw, which is horizontally supported in the filter cavity by a second bearing assembly, and the slag removal screw is driven to rotate by a second drive device; The spiral blades from the left end to the center of the slag-cleaning screw are continuous first spiral blades, and the spiral blades from the right end to the center of the slag-cleaning screw are continuous second spiral blades. The slag-cleaning port is located below the section between the first and second spiral blades. The first spiral blade rotates in the opposite direction to the second spiral blade, and when the cleaning screw is driven to rotate by the second drive device, it can gather the impurities accumulated in the filter cavity from the left and right sides toward the central cleaning port and discharge them.
6. A coarse filter cache bin according to claim 5, characterized in that: The second drive device is a second drive motor mounted on the mounting base. The output shaft of the second drive motor is fixedly connected to the input shaft of the chain drive, and the output shaft of the chain drive is fixedly connected to one end of the slag cleaning screw.
7. A coarse filter cache bin according to claim 1, characterized in that: Each filter hole is a round hole, all of the same size, and all filter holes are evenly spaced.
8. A coarse filter cache bin according to claim 7, characterized in that: The diameter of the filter pore is φ1.5~φ3mm.
9. A coarse filter cache bin according to claim 1, characterized in that: A vent is provided at the top of the cache compartment, which communicates with the cache cavity, and the number of vents is at least one.