A cyclone jet dust separator
By designing a cyclone jet dust separator and utilizing two-inlet, two-outlet cyclone screening technology, the problems of high water consumption and large space occupation in agricultural film recycling and processing are solved, achieving efficient and compact impurity separation and improving the cleanliness of the materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 王涵琳
- Filing Date
- 2025-10-14
- Publication Date
- 2026-07-07
AI Technical Summary
Existing technologies for agricultural film recycling and processing suffer from problems such as high water consumption, large space occupation, and inability to be recycled and cleaned, especially in the fine dust removal stage.
The cyclone jet dust separator adopts a design with a primary feed pipe and a secondary feed pipe, combined with an arc-shaped guide plate and a negative pressure zone, to achieve two-in, two-out cyclone screening of materials, separating most of the large particle impurities and reducing the burden on subsequent fine-tuning devices.
It achieves efficient impurity separation with a compact structure, small footprint, and no water consumption, reducing the burden on subsequent fine-tuning equipment and improving the cleanliness of materials.
Smart Images
Figure CN224465039U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material separation technology in waste treatment, and in particular to a separation and purification device for recycled plastic film. More specifically, it is a cyclone jet dust separator. Background Technology
[0002] Agricultural film recycling and processing is divided into two stages: field collection and subsequent crushing. The field collection stage mainly involves collecting the agricultural film from the fields, performing simple sorting and cleaning, and finally packaging it for later crushing. After crushing, a more refined dust removal process is carried out to remove particulate impurities trapped in the plastic film or dust adhering to it. This refined dust removal stage traditionally uses a washing method, where the waste agricultural film is placed in a washing tank. For example, Chinese patent application 2022231251114 discloses "A flotation tank for washing waste agricultural film," with authorization publication number CN218902875U. The flotation cell comprises a housing, flotation cells, and a protective enclosure. Multiple support legs are evenly distributed at the bottom of the housing. A motor mounting bracket is fixedly connected to the upper part of the housing's outer wall, with a motor chamber at its upper end. The housing provides space for the flotation cells, the support legs provide stable operating support, and the motor mounting bracket and motor chamber provide space for motor installation and movement, thus providing stable operating power. The flotation cells are fixed within the housing, facilitating cleaning operations. This water-washing method consumes a large amount of water, and subsequent drying requires significant electrical energy. Furthermore, the washing tank cannot be circulated, necessitating a long production line and consuming considerable space. Utility Model Content
[0003] The purpose of this invention is to provide a cyclone jet dust separator that is compact, occupies little space, and does not consume water resources. It uses jetting cyclones to separate heavier impurities from lighter plastic films.
[0004] The cyclone jet dust separator of this utility model includes a cylindrical primary selection chamber, a primary feed pipe and a discharge pipe inserted through the side wall of the primary selection chamber, and a primary feed fan located outside the primary selection chamber and connected to the outer end of the primary feed pipe via a pipeline. The primary selection chamber has a primary selection chamber cover at the upper end, a separation hopper at the lower end, and a longitudinally arranged central pipe in the center. The upper end of the central pipe is connected to the primary discharge pipe, which passes through the side wall of the primary selection chamber and connects to the air inlet of the circulating fan, using the circulating fan to generate negative pressure in the central pipe. The lower end of the central pipe extends into the inner cavity of the separation hopper. A secondary feed pipe is inserted through the side wall of the primary selection chamber, located between the primary feed pipe and the discharge pipe, with its outer end connected to the air outlet of the circulating fan. The outer end of the discharge pipe is connected to an induced draft fan, which generates negative pressure in the discharge pipe.
[0005] With this solution, the material of the dust separator is screened by a two-inlet, two-outlet cyclone separator, which can separate most of the large particle impurities, reducing the burden on the subsequent fine-selection device. It has a compact structure, occupies little space, and does not consume water resources.
[0006] Preferably, the inner ends of the primary feed pipe and the secondary feed pipe extend into the inner cavity of the primary selection chamber and are respectively connected to the primary arc-shaped guide plate and the secondary arc-shaped guide plate extending upward at an incline; the primary arc-shaped guide plate and the secondary arc-shaped guide plate are arc-shaped strip structures set close to the inner wall of the primary selection chamber; the inner ends of the primary feed pipe and the secondary feed pipe are set along the tangential direction of the inner wall of the primary selection chamber.
[0007] With this solution, the airflow ejected from the primary and secondary feed pipes is guided by the arc-shaped guide plate and spirals upward along the inner wall of the primary selection chamber.
[0008] Preferably, the lower end of the primary selection bin is provided with a slag discharge auger, and the inlet of the slag discharge auger is connected to the outlet of the separation hopper.
[0009] This solution allows the outlet of the separation hopper to be relatively sealed by the slag discharge auger, maintaining negative pressure at the lower end of the central pipe, while also allowing impurities that have settled into the separation hopper to be discharged at any time.
[0010] Preferably, a U-shaped bend is provided between the outer end of the unloading pipe and the induced draft fan.
[0011] With this solution, impurities passing through the unloading pipe can settle to the U-shaped bend section, further improving the cleanliness of the materials conveyed to the next process.
[0012] Preferably, the separating hopper has an inner cavity with a cone-shaped structure that is larger at the top and smaller at the bottom, and the lower end of the primary selection chamber is connected to the upper port of the separating hopper.
[0013] With this solution, the materials settling in the initial selection bin will all enter the separation hopper.
[0014] Preferably, the air outlet of the induced draft fan is connected to a water washing tank or a cyclone dust collector.
[0015] This solution further improves the cleanliness of the materials.
[0016] In summary, the cyclone jet dust separator of this utility model can separate most of the large particle impurities through two-inlet and two-outlet cyclone screening, reducing the burden on subsequent fine-tuning devices. It has a compact structure, occupies little space, and does not consume water resources.
[0017] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description
[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.
[0019] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention in use.
[0020] Figure 2 This is a three-dimensional structural diagram of another embodiment of the present invention in use.
[0021] Figure 3 This is a schematic diagram of the internal structure of the initial selection chamber after the outer shell has been removed.
[0022] Figure 4 This is a cross-sectional structural diagram of the central tube, the separating hopper, and the slag removal auger. Detailed Implementation
[0023] It should be noted that the following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.
[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0025] In all the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.
[0027] like Figure 1 , Figure 2 As shown, the cyclone jet dust separator of this utility model includes a cylindrical primary selection chamber 9, a primary feed pipe 91 and a discharge pipe 96 inserted through the side wall of the primary selection chamber 9, and a primary selection feed fan 81 located outside the primary selection chamber 9 and connected to the outer end of the primary feed pipe 91 through a pipe. The air inlet of the primary selection feed fan 81 extends into the silo 98 through a pipe. The negative pressure generated when the primary selection feed fan 81 is working is used to draw in the material in the silo 98 and transport it to the primary selection chamber 9 through the primary feed pipe 91 for dust removal and separation.
[0028] The primary selection chamber 9 has a primary selection chamber cover 93 at its upper end, a separating hopper 84 at its lower end, and a longitudinally arranged central pipe 83 in its center. The upper end of the central pipe 83 is connected to a primary discharge pipe 92, which passes through the side wall of the primary selection chamber 9 and connects to the air inlet of a circulating fan 82. The circulating fan 82 generates negative pressure in the central pipe 83. Figure 4 As shown, the lower end of the central tube 83 extends into the inner cavity of the separating hopper 84, but does not contact the inner wall of the separating hopper 84. There is a certain gap between them so that heavier particulate impurities and dust can enter the outlet of the separating hopper 84 through the gap, while lighter plastic film is sucked into the central tube 83 through the gap; Figure 3 As shown by the middle arrow, when the feed fan 81 is working, it blows the material into the primary selection chamber 9 through the primary feed pipe 91; when the circulating fan 82 is working, the material that enters the primary selection chamber 9 through the primary feed pipe 91 settles into the separation hopper 84 at the bottom of the central pipe 83, is then sucked into the central pipe 83 by negative pressure, and is discharged from the primary discharge pipe 92 to complete one cycle.
[0029] A secondary feed pipe 95 is inserted through the side wall of the primary selection chamber 9. The secondary feed pipe 95 is located between the primary feed pipe 91 and the discharge pipe 96, that is, the secondary feed pipe 95 is slightly higher than the primary feed pipe 91 but lower than the discharge pipe 96; the outer end of the secondary feed pipe 95 is connected to the air outlet of the circulating fan 82. Figure 3 As shown by the middle arrow, after the material completes one cycle and is discharged from the primary selection chamber 9 by the circulating fan 82, it returns to a slightly higher position in the primary selection chamber 9 through the secondary feed pipe 95 under the pushing action of the circulating fan 82, and is then discharged from the discharge pipe 96, completing the second cycle.
[0030] The outer end of the discharge pipe 96 is connected to the induced draft fan 99, which generates negative pressure in the discharge pipe 96. The secondary feed pipe 95 is located closer to the discharge pipe 96. The closer distance, combined with the powerful airflow of the circulating fan 82, allows the material ejected from the secondary feed pipe 95 to be drawn into the secondary feed pipe 95 by the negative pressure near the discharge pipe 96.
[0031] The unloading pipe 96 can be directly connected to the induced draft fan 99. In another embodiment of this invention, a U-shaped bend section 97 is provided between the outer end of the unloading pipe 96 and the induced draft fan 99. When the material passes through the U-shaped bend section 97, a small amount of particulate impurities will fall off the plastic film. These impurities will remain at the bend or lower part of the U-shaped bend section 97. An inspection hole can be opened in the U-shaped bend section 97, and a sealing door can be installed on the inspection hole. The impurities can be cleaned periodically by opening the sealing door through the inspection hole.
[0032] The feed fan 81, circulating fan 82, and induced draft fan 99 are all centrifugal fans. During the primary and secondary circulation processes of the material carrying particulate impurities and dust in the primary selection chamber 9, the heavier particulate impurities and dust detach from the plastic film body. The detached impurities are basically unaffected by the negative pressure and fall into the separation hopper 84 for discharge. The lighter plastic film body is attracted by the negative pressure. The material injected into the primary selection chamber 9 during the primary circulation is at a lower position and far from the discharge pipe 96. The negative pressure of the discharge pipe 96 is insufficient to affect it. Therefore, this material will fall naturally into the separation hopper 84 after leaving the cyclone action and be sucked into the central pipe 83 by the negative pressure near the inlet of the central pipe 83. The material injected into the primary selection chamber 9 during the secondary circulation is at a lower position and close to the discharge pipe 96. This material will be sucked into the discharge pipe 96 by the negative pressure near the discharge pipe 96 before leaving the cyclone action.
[0033] like Figure 3As shown, as a further improvement of this utility model, the inner ends of the primary feed pipe 91 and the secondary feed pipe 95 extend into the inner cavity of the primary selection chamber 9 and are respectively connected to the primary arc-shaped guide plate 971 and the secondary arc-shaped guide plate 972 extending upward at an incline; the primary arc-shaped guide plate 971 and the secondary arc-shaped guide plate 972 are arc-shaped strip structures set close to the inner wall of the primary selection chamber 9; the inner ends of the primary feed pipe 91 and the secondary feed pipe 95 are set along the tangential direction of the inner wall of the primary selection chamber 9. The width of the primary arc-shaped guide plate 971 and the secondary arc-shaped guide plate 972 extends from the inner wall of the primary selection chamber 9 towards the center and covers the diameter of the primary feed pipe 91 or the secondary feed pipe 95, but is less than one-quarter of the inner diameter of the primary selection chamber 9. The width of the arc-shaped guide plate 971 is sufficient to guide the airflow ejected from the primary feed pipe 91 or the secondary feed pipe 95, while leaving enough space for the material to move downwards. The length of the primary arc-shaped guide plate 971 and the secondary arc-shaped guide plate 972 extends from the inner end of the primary feed pipe 91 or the secondary feed pipe 95 along a spiral upward trajectory of 30 degrees to 120 degrees. In this embodiment, 60 degrees is used, which means that the length of a single arc-shaped guide plate occupies one-quarter of a circumference. This can make full use of the impact force of the airflow ejected from the primary feed pipe 91 and the secondary feed pipe 95 to push the material to a higher position. The highest point of the primary arc-shaped guide plate 971 is lower than the inner end of the secondary feed pipe 95, which avoids interference between the airflow guided by the primary arc-shaped guide plate 971 and the secondary arc-shaped guide plate 972. The outer sides of the primary arc-shaped guide plate 971 and the secondary arc-shaped guide plate 972 are fixedly connected to the inner wall of the primary selection chamber 9. The surface of the arc-shaped guide plate is perpendicular to the inner wall of the primary selection chamber 9, forming a ramp that slopes upward along the inner wall of the primary selection chamber 9. The airflow ejected from the primary feed pipe 91 and the secondary feed pipe 95 blows the material to the top of the arc-shaped guide plate along their respective ramps, while generating an upward spiral airflow in the inner cavity of the primary selection chamber 9.
[0034] In addition, to maintain negative pressure in the inner cavity of the separating hopper 84 and at the lower end of the central tube 83, the outlet of the separating hopper 84 needs to maintain a certain degree of airtightness. In this embodiment, the separating hopper 84 has an inner cavity with a cone-shaped structure that is larger at the top and smaller at the bottom. The lower end of the primary selection chamber 9 is connected to the upper port of the separating hopper 84. A slag discharge auger 94 is provided at the lower end of the primary selection chamber 9, and the inlet of the slag discharge auger 94 is connected to the outlet of the separating hopper 84. After the particulate impurities and dust that settle in the primary selection chamber 9 fall into the separating hopper 84, they converge along its inclined inner wall to the outlet, and enter the inlet of the slag discharge auger 94 through the outlet, and are discharged as the slag discharge auger 94 operates.
[0035] like Figure 1 , Figure 2 As shown, the air outlet of the induced draft fan 99 can be connected to the water washing tank 100 or the cyclone dust collector 101 to obtain a plastic film with higher cleanliness.
[0036] like Figure 1 , Figure 3 As shown, when the separator of this utility model is used, it first cuts the recycled plastic film material into sufficiently small pieces so that it can be sucked into the primary selection chamber 9 by the primary selection feed fan 81. At the same time, sufficiently small pieces can avoid entanglement and affect the impurity removal effect. The shredded material is placed into the hopper 98. The feed fan 81, circulating fan 82, and induced draft fan 99 are turned on. The feed fan 81 draws material from the hopper 98 and blows it into the primary feed pipe 91, which then sends it into the primary selection chamber 9. Simultaneously, the circulating fan 82 generates negative pressure at the lower end of the central pipe 83, and the induced draft fan 99 generates negative pressure near the upper discharge pipe 96 of the primary selection chamber 9. The material blown in by the primary feed pipe 91 is far from the negative pressure zone at the upper end of the primary selection chamber 9 and is not attracted by the discharge pipe 96. At this time, the material is impacted by the cyclone, and the particulate impurities carried in the plastic film fragments separate from the film body. The particulate impurities fall rapidly, while the plastic film slowly drifts away. The fallen particulate impurities are then dispersed through... The material enters the separator hopper 84 and is discharged as the separator 94 operates. The falling plastic film descends to the outlet of the separator hopper 84 and is sucked into the central pipe 83 by the negative pressure. Then, it is blown back into the primary selection chamber 9 through the primary discharge pipe 92, the circulating fan 82, and the secondary feed pipe 95. At this time, because the secondary feed pipe 95 and the secondary arc guide plate 972 are at a higher position, the material entering the secondary chamber is closer to the negative pressure zone at the top of the primary selection chamber 9. The detached particulate impurities still fall into the separator hopper 84 and are discharged by the separator 94. However, the plastic film is attracted by the negative pressure of the discharge pipe 96 and is sucked into the discharge pipe 96. Then, it enters the cyclone dust collector 101 or the water washing tank 100 of the next process through the U-shaped bend section 97 and the induced draft fan 99.
[0037] The structure and operation of the cyclone dust collector 101 and the water washing tank 100 are far from the prior art and will not be described in detail here.
[0038] While specific embodiments of the present invention have been described in detail above, those skilled in the art should understand that these examples are for illustrative purposes only and not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims.
Claims
1. A cyclone jet dust separator, comprising a cylindrical primary selection chamber (9), a primary feed pipe (91) and a discharge pipe (96) inserted through the side wall of the primary selection chamber (9), and a primary feed fan (81) disposed outside the primary selection chamber (9) and connected to the outer end of the primary feed pipe (91) via a pipeline, characterized in that: The primary selection chamber (9) has a primary selection chamber cover (93) at the upper end, a separation hopper (84) at the lower end, and a central pipe (83) arranged longitudinally in the center. The upper end of the central pipe (83) is connected to the primary discharge pipe (92). The primary discharge pipe (92) passes through the side wall of the primary selection chamber (9) and is connected to the air inlet of the circulating fan (82). The circulating fan (82) generates negative pressure in the central pipe (83). The lower end of the central pipe (83) extends into the inner cavity of the separation hopper (84). A secondary feed pipe (95) is inserted through the side wall of the primary selection chamber (9). The secondary feed pipe (95) is located between the primary feed pipe (91) and the discharge pipe (96). The outer end of the secondary feed pipe (95) is connected to the air outlet of the circulating fan (82). The outer end of the discharge pipe (96) is connected to the induced draft fan (99). The induced draft fan (99) generates negative pressure in the discharge pipe (96).
2. The cyclone jet dust collector according to claim 1, characterized in that: The inner ends of the primary feed pipe (91) and the secondary feed pipe (95) extend into the inner cavity of the primary selection chamber (9) and are respectively connected to the primary arc-shaped guide plate (971) and the secondary arc-shaped guide plate (972) extending upward at an incline; the primary arc-shaped guide plate (971) and the secondary arc-shaped guide plate (972) are arc-shaped strip structures set close to the inner wall of the primary selection chamber (9); the inner ends of the primary feed pipe (91) and the secondary feed pipe (95) are set along the tangential direction of the inner wall of the primary selection chamber (9).
3. A cyclone jet dust collector according to claim 1 or 2, characterized in that: The lower end of the primary selection bin (9) is provided with a slag discharge auger (94), and the inlet of the slag discharge auger (94) is connected to the outlet of the separation hopper (84).
4. A cyclone jet dust collector according to claim 1 or 2, characterized in that: A U-shaped bend (97) is provided between the outer end of the unloading pipe (96) and the induced draft fan (99).
5. A cyclone jet dust collector according to claim 1 or 2, characterized in that: The separating hopper (84) has an inner cavity with a cone-shaped structure that is larger at the top and smaller at the bottom, and the lower end of the primary selection chamber (9) is connected to the upper end of the separating hopper (84).
6. A cyclone jet dust collector according to claim 1 or 2, characterized in that: The air outlet of the induced draft fan (99) is connected to the water washing tank (100).
7. A cyclone jet dust collector according to claim 1 or 2, characterized in that: The outlet of the induced draft fan (99) is connected to the cyclone dust collector (101).