Coarse filtering device convenient for deslagging

Abstract

The utility model relates to the technical field of resin filtration, and provides a coarse filtration device convenient for deslagging, which comprises a barrel, an inner barrel fixed in the barrel, a slag containing cavity reserved between the barrel and the inner barrel and used for containing impurities, a slag discharge pipe connected with the bottom of the barrel and communicated with the slag containing cavity, a filter cartridge limited in the inner barrel, and a filter screen connected with the filter cartridge, the barrel is connected with a feeding pipe communicated with the upper portion of the filter cylinder, the filter cylinder is communicated with the inner cylinder through the filter holes, the barrel is connected with a discharging pipe communicated with the lower portion of the inner cylinder, a motor is arranged on the barrel, and an output shaft of the motor is connected with a spiral shaft which is coaxially arranged in the filter cylinder in a matched mode and used for lifting impurities to the slag containing cavity. Through nested arrangement of the cylinder body, the inner cylinder and the filter cylinder, separation of resin and impurities is achieved, the overall structure is compact, the impurities are lifted to the slag containing cavity in real time through the spiral shaft, dynamic recovery of the filtering area is guaranteed, frequent shutdown caused by impurity accumulation is avoided, and the continuous production period is remarkably prolonged.

Description

Technical Field

[0001] This utility model relates to the field of resin filtration technology, and more specifically, to a coarse filtration device that facilitates slag removal. Background Technology

[0002] In the synthetic resin production process, the introduction of mechanical impurities and particulate matter generated by localized uncontrolled polymerization can easily lead to blockages in pipelines, transfer pumps, and downstream filtration equipment. This not only reduces production efficiency and affects product quality but may also cause safety hazards due to abnormal increases in system pressure. To address this issue, existing technologies generally employ a fixed-capacity coarse filter at the reactor outlet to intercept large particulate impurities and reduce the load on subsequent filtration equipment. However, such traditional coarse filters have significant limitations: their sludge capacity is fixed and the state of impurity accumulation cannot be dynamically predicted. Once impurities accumulate beyond the design capacity, the filter screen will quickly become clogged, forcing production to be interrupted for manual cleaning. Especially when the resin production process involves high-temperature or flammable media, the cleaning operation requires opening the sealed structure of the device, facing risks of high-temperature liquid evaporation, flammability, and personnel safety threats, further exacerbating the efficiency losses caused by production stoppages. In addition, frequent downtime for maintenance not only increases production costs but also makes it difficult to guarantee batch stability due to production continuity interruptions. Therefore, how to achieve uninterrupted cleaning of the coarse filter while ensuring safety and environmental protection and maintaining the continuity of the production process has become a pressing technical challenge. Utility Model Content

[0003] The purpose of this invention is to provide a coarse filtration device that facilitates slag removal, thus solving the problem that traditional coarse filtration devices require shutdown for slag removal.

[0004] This utility model is achieved through the following technical solution: a coarse filtration device for easy slag removal, comprising a cylinder, an inner cylinder fixed inside the cylinder, a slag-containing cavity for accommodating impurities between the cylinder and the inner cylinder, a slag discharge pipe connected to the bottom of the cylinder and communicating with the slag-containing cavity, a filter cylinder limited in the inner cylinder, a feed pipe connected to the upper part of the filter cylinder connected to the cylinder, the filter cylinder communicating with the inner cylinder through a filter hole, a discharge pipe connected to the lower part of the inner cylinder connected to the cylinder, a motor installed on the cylinder, and a spiral shaft coaxially placed inside the filter cylinder for lifting impurities to the slag-containing cavity.

[0005] Furthermore, the blades of the spiral shaft are provided with leakage holes.

[0006] Furthermore, the blades of the spiral shaft extend above the upper edge of the filter cartridge.

[0007] Furthermore, a return pipe is connected to the middle of the cylinder. One end of the return pipe is connected to the slag-containing chamber, and the other end of the return pipe is connected to a suction pump and then to the feed pipe.

[0008] Furthermore, the inner cylinder is coaxially connected to the cylinder body via a fixing bracket.

[0009] Furthermore, the inner wall of the inner cylinder is provided with a limiting ring for engaging and limiting the filter cartridge.

[0010] Furthermore, filter holes are evenly distributed on the side walls and bottom plate of the filter cartridge.

[0011] Furthermore, the slag discharge pipe is connected to a switch valve and a pressure sensor.

[0012] This utility model has at least the following advantages and beneficial effects: by nesting the cylinder, inner cylinder and filter cylinder, the resin and impurities are separated. The overall structure is compact. The spiral shaft lifts the impurities to the slag chamber in real time, ensuring the dynamic recovery of the filtration area, avoiding frequent shutdowns due to impurity accumulation, and significantly extending the continuous production cycle. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of a coarse filtration device for easy slag removal provided by this utility model.

[0014] Figure 2 A perspective view of a coarse filtration device for easy slag removal provided by this utility model.

[0015] Figure 3 A partial half-sectional view of a coarse filtration device for easy slag removal provided by this utility model.

[0016] Figure 4 This utility model Figure 2 Sectional view along the AA direction.

[0017] Reference numerals in the attached drawings: 1-Cylinder body, 10-Slag chamber, 11-Slag discharge pipe, 12-Feed pipe, 13-Discharge pipe, 14-Return pipe, 2-Inner cylinder, 21-Fixing frame, 22-Limiting ring, 3-Filter cylinder, 30-Filter hole, 4-Motor, 41-Screw shaft, 410-Leakage hole. Detailed Implementation

[0018] The specific implementation method is described below with reference to the accompanying drawings.

[0019] Example

[0020] like Figures 1 to 4As shown, this embodiment mainly discloses a coarse filtration device for easy slag removal, including a cylinder 1, an inner cylinder 2 fixed inside the cylinder 1, a slag-containing cavity 10 for accommodating impurities between the cylinder 1 and the inner cylinder 2, a slag discharge pipe 11 connected to the bottom of the cylinder 1 and communicating with the slag-containing cavity 10, a filter cylinder 3 limited in the inner cylinder 2, a feed pipe 12 connected to the upper part of the filter cylinder 3 connected to the cylinder 1, the filter cylinder 3 communicating with the inner cylinder 2 through a filter hole 30, a discharge pipe 13 connected to the lower part of the inner cylinder 2 connected to the cylinder 1, a motor 4 provided on the cylinder 1, and a spiral shaft 41 coaxially placed inside the filter cylinder 3 for lifting impurities to the slag-containing cavity 10. Specifically, the feed pipe 12, connected to the outlet of the reactor, introduces molten resin into the filter cartridge 3. After coarse filtration through the filter holes 30, the resin flows into the inner cylinder 2 and then through the discharge pipe 13 to the subsequent processing steps. Large particles of impurities mixed in the resin are trapped in the filter cartridge 3. As the motor 4 drives the screw shaft 41 to rotate, the impurities are lifted from bottom to top and carried out of the filter cartridge 3, falling into the slag chamber 10. Then, they are periodically discharged from the cylinder 1 through the slag discharge pipe 11. Through the nested arrangement of the cylinder 1, inner cylinder 2, and filter cartridge 3, the separation of resin and impurities is achieved. The overall structure is compact. The screw shaft 41 lifts impurities to the slag chamber 10 in real time, ensuring the dynamic recovery of the filtration area and avoiding frequent shutdowns due to impurity accumulation, thus significantly extending the continuous production cycle.

[0021] Furthermore, in a specific implementation, the blades of the aforementioned spiral shaft 41 provided in this embodiment of the present invention are provided with leakage holes 410. Specifically, a plurality of leakage holes 410 are evenly spirally and uniformly arranged along the blades of the spiral shaft 41. The leakage holes 410 allow liquid resin to be retained in the filter cartridge 3 through the leakage holes 410 during the spiral lifting process, avoiding the resin being forcibly carried out by the blades of the spiral shaft 41 and reducing material waste. It should be noted that impurities in resin production (such as unpolymerized particles, mechanical foreign objects, etc.) are usually large in size, while the resin liquid is in a molten state or a low-viscosity liquid state during the filtration stage. The fit gap between the spiral shaft 41 and the filter cartridge 3, the filter hole 30, and the leakage holes 410 only allow the resin liquid to pass through, while large particles of impurities are trapped in the inner filter cartridge 3. At the same time, during operation, the resin liquid will not completely fill the filter cartridge 3, and the resin has a certain viscosity, which causes impurities to not settle to the bottom of the filter cartridge 3 quickly. Under the lifting action of the spiral shaft 41, impurities can be effectively captured and pushed upwards out of the filter cartridge 3; while the liquid resin, due to its high fluidity, can flow out quickly through gaps and leakage holes 410, or be thrown out through the side filter holes under the action of vortex centrifugal force. This avoids the liquid resin being entrained and carried out during the lifting process, ensuring that impurities are forcibly lifted along the spiral channel to the slag-holding chamber 10, while the flow direction of the resin liquid is always towards the material outlet (below or to the side of the filter cartridge 3), forming an effective reverse separation.

[0022] Furthermore, in a specific implementation, the blades of the spiral shaft 41 provided in this embodiment of the present invention extend above the upper edge of the filter cylinder 3. This allows the spiral shaft 41 to completely push impurities into the slag-holding chamber 10 when rotating, preventing impurities from remaining at the top of the filter cylinder 3 or falling back into the filter cylinder 3 to form secondary blockages, thus ensuring the separation effect.

[0023] Furthermore, in a specific implementation, a return pipe 14 is connected to the middle of the cylinder 1 provided in this embodiment of the present invention. One end of the return pipe 14 is connected to the slag-containing cavity 10, and the other end of the return pipe 14 is connected to a suction pump and then to the feed pipe 12. Specifically, because liquid resin has a certain viscosity, impurities are coated with resin. At the same time, when the spiral shaft 41 rotates at high speed, a small amount of liquid resin may be carried out. As time settles, stratification occurs in the slag-containing cavity 10. Impurities are deposited in the lower layer, while the upper layer of liquid resin is reintroduced into the filter cartridge 3 through the feed pipe 12 via the suction pump for filtration, reducing material loss and preventing liquid resin from accumulating in the slag-containing cavity 10 and causing corrosion or deterioration.

[0024] Furthermore, in a specific implementation, the inner cylinder 2 provided in this embodiment of the present invention is coaxially connected to the cylinder body 1 via a fixing frame 21. The fixing frame 21 rigidly connects the inner cylinder 2 to the cylinder body 1, thereby fixing the relative position of the filter cylinder 3 and preventing the spiral shaft 41 from jamming or wearing due to eccentric operation.

[0025] Furthermore, in a specific implementation, the inner wall of the inner cylinder 2 provided in this embodiment of the present invention is provided with a limiting ring 22 for engaging and limiting the filter cartridge 3. Specifically, the filter cartridge 3 is directly inserted into the inner cylinder 2 from above and engaged within the inner cylinder 2 by the limiting ring 22, fixing the relative position of the filter cartridge 3 and the inner cylinder 2, ensuring the coaxiality of the filter cartridge 3 and the inner cylinder 2, and preventing partial blockage caused by misalignment of the filter cartridge 3. After the batch of products is produced, the coarse filtration device can be disassembled, and the filter cartridge 3 can be removed for replacement or cleaning, reducing maintenance costs.

[0026] Furthermore, in specific implementations, the filter holes 30 provided in this embodiment are uniformly formed on the side walls and bottom plate of the filter cartridge 3. This allows the resin liquid to form a combined radial and axial flow path within the filter cartridge 3, reducing the risk of filter hole clogging caused by excessively high local flow velocities.

[0027] Furthermore, in a specific implementation, the slag discharge pipe 11 provided in this embodiment of the present invention is connected to a switching valve and a pressure sensor. The pressure sensor monitors the pressure inside the slag-containing chamber 10 in real time, and automatically opens the switching valve to discharge slag when the pressure reaches a set threshold, thus avoiding blockage or premature slag discharge caused by human error.

Claims

1. A coarse filtering device facilitating dross removal, characterized in that, The device includes a cylindrical body (1), an inner cylinder (2) fixed inside the cylindrical body (1), a slag-containing cavity (10) for accommodating impurities between the cylindrical body (1) and the inner cylinder (2), a slag discharge pipe (11) connected to the bottom of the cylindrical body (1) and communicating with the slag-containing cavity (10), a filter cylinder (3) limited in the inner cylinder (2), a feed pipe (12) connected to the upper part of the filter cylinder (3) connected to the cylindrical body (1), the filter cylinder (3) communicating with the inner cylinder (2) through a filter hole (30), a discharge pipe (13) connected to the lower part of the inner cylinder (2) connected to the cylindrical body (1), a motor (4) provided on the cylindrical body (1), and a spiral shaft (41) coaxially placed in the filter cylinder (3) for lifting impurities to the slag-containing cavity (10) connected to the output shaft of the motor (4).

2. A rough filter device for facilitating dross removal according to claim 1, characterized in that, The blades of the spiral shaft (41) are provided with leakage holes (410).

3. A rough filter device for facilitating dross removal according to claim 1, characterized in that, The blades of the spiral shaft (41) extend above the upper edge of the filter cartridge (3).

4. A rough filter device for facilitating dross removal according to claim 1, characterized in that, The cylinder (1) is connected to a return pipe (14) in the middle. One end of the return pipe (14) is connected to the slag chamber (10), and the other end of the return pipe (14) is connected to a suction pump and then to the feed pipe (12).

5. A rough filter device for facilitating dross removal according to claim 1, characterized in that, The inner cylinder (2) is coaxially connected to the cylinder body (1) via a fixing frame (21).

6. A rough filter device for facilitating dross removal according to claim 1, characterized in that, The inner wall of the inner cylinder (2) is provided with a limiting ring (22) for locking and limiting the filter cylinder (3).

7. A rough filter device for facilitating dross removal according to claim 1, characterized in that, The filter holes (30) are evenly distributed on the side wall and bottom plate of the filter cylinder (3).

8. A rough filter device for facilitating dross removal according to claim 1, characterized in that, The slag discharge pipe (11) is connected to a switch valve and a pressure sensor.

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