Slurry purification device and method for food packaging paper
By using a power-driven filter cartridge rotation and scraper design, combined with centrifugal force and pressure filtration, the clogging problem of slurry purification equipment is solved, achieving efficient and stable slurry purification, and improving purification accuracy and production continuity.
Patent Information
- Application Number
- CN202511503096.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-02-10
AI Technical Summary
Existing slurry purification equipment is prone to clogging when processing materials with high impurity content or containing viscous substances, resulting in decreased filtration efficiency. Furthermore, traditional self-cleaning devices are complex in structure or ineffective, making it difficult to achieve efficient and stable slurry purification.
The filter cartridge is driven by a power component and rotates in combination with a scraper. It uses a combination of centrifugal force and pressure filtration, and uses spiral blades to scrape off impurities from the inner wall of the filter cartridge. Combined with the design of overflow port and drain pipe, it achieves continuous self-cleaning and efficient separation.
It achieves continuous and stable purification of slurry, avoids filter clogging, significantly improves purification accuracy and production efficiency, and reduces maintenance costs.
Smart Images
Figure CN121496777A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of pulp processing, in particular to a pulp purification device and method for food packaging paper. BACKGROUND
[0002] In the production process of food packaging paper, the purity of the pulp is a key factor determining the quality and safety of the final product. If the pulp contains impurities such as plastic pieces, sand particles, and metal scraps, it will not only cause defects on the surface of the paper and uneven strength, but more seriously, these impurities may migrate to the food, causing safety hazards. Therefore, in the papermaking process, efficient purification of the pulp is a crucial process.
[0003] Currently, the widely used pulp purification equipment in the industry is mainly a filtering device such as a pressure screen or a vibrating screen. These devices usually rely on a screen drum (filter screen) to separate the pulp under the action of pressure or vibration. However, such traditional equipment has obvious technical bottlenecks in actual operation: first, when dealing with pulp with high impurity content or containing sticky substances, the screen gap of the screen drum is easily clogged, resulting in a rapid decrease in filtration efficiency, an increase in equipment operating resistance, and an increase in energy consumption; second, in order to solve the clogging problem, frequent shutdown for manual cleaning and maintenance is usually required, which not only seriously disrupts the continuity of production, reduces production efficiency, but also increases labor costs and labor intensity. In addition, the traditional static filtration or simple vibration filtration method has limited separation effect on light impurities with similar specific gravity to fibers, and the purification is not thorough enough.
[0004] To solve the problem of clogging, some self-cleaning devices with scrapers or brushes have appeared in the prior art, but they often have complex structures, unsatisfactory cleaning effect, or are prone to damage to the filter screen when cleaning, shortening the service life.
[0005] Therefore, there is an urgent need in the art for a new type of pulp purification device and method that can run continuously and stably, has high self-cleaning ability, can fundamentally prevent filter screen clogging, and can further improve the purification accuracy of the pulp. SUMMARY
[0006] The present application aims to provide a pulp purification device and method for food packaging paper to solve the problems raised in the background art.
[0007] To solve the above technical problems, the present application is realized by the following technical scheme: The application discloses a slurry purifying device for food packaging paper, which comprises a base frame, a filter element and a power element installed on the base frame, wherein the power element is used for driving the filter element to work, a ring seat is fixed on the base frame, the filter element is installed on the ring seat, a cylinder is installed on the ring seat, the cylinder is vertically arranged, the bottom end of the cylinder is fixed on the ring seat and is closed, the top end of the cylinder is closed through a cover, a feeding port, a discharging port and an overflow port are sequentially arranged on the outer side of the cylinder from bottom to top, a filter cartridge is installed in the cylinder, the filter cartridge divides the inner part of the cylinder into cavity one and cavity two, a circular hole is formed in the ring seat, the circular hole is closed through an end cover, a discharge port is arranged on the end cover, the discharge port is communicated with the cavity two, and the bottom end of the filter cartridge is matchedly installed in the circular hole.
[0008] Further, the filter cartridge comprises a framework and a filter screen installed in the framework, and the bottom end of the framework is matchedly installed in the circular hole.
[0009] Further, the top end of the framework is provided with a tooth ring, and a plurality of plate bodies are vertically arranged on the framework.
[0010] Further, an scraping element is arranged on the outer side of the framework, the scraping element is arranged in the cylinder, the scraping element comprises a ring body arranged on the outer side of the tooth ring, a plurality of spiral blades are arranged on the bottom end of the ring body in a ring shape, and the outer side of the spiral blade is attached to the inner wall of the cylinder.
[0011] Further, an inner tooth body is arranged on the inner wall of the ring body, the inner tooth body is connected with the tooth ring through gear transmission, and the ring body is arranged on the upper end of the cylinder.
[0012] Further, the framework is installed on a shaft body, the bottom end of the shaft body penetrates through the end cover and is provided with a belt pulley, another belt pulley is installed on the output end of the power element, and the two belt pulleys are connected through a belt.
[0013] Further, a blowdown pipe is formed in the ring seat, and the blowdown pipe is communicated with the cavity one.
[0014] A slurry purifying method for food packaging paper is adopted, and the slurry purifying device is used, and the method comprises the following steps. The slurry to be filtered is sent into the cavity one through the feeding port; Under the action of the pressure difference, the slurry is filtered through the filter cartridge, enters the cavity two and is discharged through the discharge port; The power element is started to drive the filter cartridge to rotate, so that the large-particle impurities in the slurry move to the inner wall of the cylinder under the action of the centrifugal force; The impurities on the inner wall of the cylinder are pushed upwards through the spiral blades of the scraping element and are discharged from the discharging port.
[0015] Further, when the filter cartridge rotates, the scraping member is driven to rotate through the transmission of the gear ring and the inner gear body, so that the spiral blade realizes the scraping and pushing functions.
[0016] Further, when the liquid surface of the slurry in the cavity one exceeds the overflow port, the excess slurry overflows from the overflow port to maintain the pressure stability in the cavity one.
[0017] The present application has the following advantages: (1) The present application drives the filter cartridge to rotate through the power member, and drives the scraping member to rotate through the gear transmission linkage, so that the spiral blade rotates closely to the inner wall of the cylinder. This design can actively and continuously scrape and remove the solid impurities accumulated on the cylinder wall during the filtering process upward and from the discharge port, thereby avoiding the common filter screen blockage problem in the traditional filtering equipment, ensuring that the device can operate stably and efficiently for a long time, and being particularly suitable for processing food packaging pulp with high impurity content.
[0018] (2) The present application combines dynamic centrifugal separation with static pressure filtration. The rotating filter cartridge drives the slurry to move through the plate body on the skeleton, so that the impurities with high specific gravity are thrown to the cylinder wall under the action of centrifugal force, thereby realizing preliminary separation. At the same time, the slurry penetrates the filter screen to complete fine filtration under the action of pressure difference. This dual purification mechanism of "centrifugal pre-separation + pressure fine filtration" not only reduces the load of the filter screen, but also can more thoroughly remove impurities of different particle sizes, thereby significantly improving the purity of the final slurry and the product quality.
[0019] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0021] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a side structural schematic diagram of the present application; Figure 3 is a side structural schematic diagram of the present application; Figure 2 is an A-A sectional schematic diagram of the present application; Figure 4 is a schematic diagram of the filtering member of the present application; Figure 5 is a schematic diagram of the filtering member installation of the present application; Figure 6 is a side schematic diagram of the filtering member of the present application; Figure 7 The present application Figure 6 is a B-B profile schematic diagram of the present application; Figure 8 is a schematic diagram of the present application filter exploded view; Figure 9 is a schematic diagram of the present application filter and scraping element; In the drawings, the components represented by each reference numeral are listed as follows: In the drawings: 1, chassis; 2, power element; 3, ring seat; 301, sewage pipe; 4, cylinder; 401, feed inlet; 402, discharge outlet; 403, overflow; 5, cover; 6, filter cartridge; 601, skeleton; 602, filter screen; 603, gear ring; 7, scraping element; 701, ring body; 702, inner tooth body; 703, helical blade; 8, gear; 9, shaft; 10, pulley; 11, end cover; 1101, discharge port; 12, belt. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.
[0023] In the production process of food packaging paper, the purity of the pulp is a key factor to determine the quality and safety of the final product. If the pulp contains impurities such as plastic sheets, sand particles, metal scraps, etc., it will not only cause defects on the surface of the paper and uneven strength, but also may cause food safety hazards. At present, the widely used pulp purification equipment in the industry, such as pressure screen or vibrating screen, mainly relies on the screen drum (filter screen) for filtering and separating. However, these traditional devices have obvious bottlenecks: the screen drum is easily clogged by impurities during operation, resulting in rapid decline of filtering efficiency, increase of energy consumption, and frequent shutdown for cleaning, which seriously disrupts the continuity of production and increases maintenance costs. In addition, the traditional static or simple vibrating filtering method has limited separation effect on light impurities with similar specific gravity to fibers. Although some self-cleaning devices have been proposed, they often have problems such as complex structure, incomplete cleaning, or easy damage to the filter screen.
[0024] To solve the above technical problems, the present application provides a pulp purification device and method which can operate continuously and stably, has high self-cleaning capacity, and can significantly improve the purification precision.
[0025] Embodiment one:
[0026] With reference to Figures 1-9 , the present embodiment provides a pulp purification device for food packaging paper.
[0027] The device comprises a solid base frame 1 which provides support for the entire equipment. A power element 2 (e.g. an electric motor) is mounted on the base frame 1 as a power source, and a core filter component is also mounted on the base frame 1. The power element 2 is used to drive the filter component to work.
[0028] A ring seat 3 is fixedly mounted on the base frame 1. A vertically arranged cylinder 4 is fixed at the bottom end of the ring seat 3 and is closed at the top end by an openable cover 5 for internal maintenance and cleaning. Three interfaces are sequentially arranged on the side wall of the cylinder 4 from bottom to top: a feeding port 401, a discharging port 402 and an overflow port 403. The inner diameter of the feeding port 401 is designed to be larger than that of the discharging port 402 to ensure that sufficient filtration pressure can be established in the cavity one.
[0029] A filter cartridge 6 is mounted in the cylinder 4, which divides the internal space of the cylinder into two parts: a cavity one between the filter cartridge 6 and the inner wall of the cylinder 4, and a cavity two inside the filter cartridge 6.
[0030] A circular hole is formed in the ring seat 3, which is closed by an end cover 11. The end cover 11 is provided with a discharge port 1101 which communicates with the cavity two and is used to discharge the filtered clean slurry. The bottom end of the filter cartridge 6 is precisely fitted into the circular hole to ensure the sealing of the cavity two.
[0031] Specifically, the filter cartridge 6 is composed of a framework 601 and a filter screen 602 fixed inside the framework 601. The bottom end of the framework 601 is mounted in the circular hole of the ring seat 3, and the top end is provided with a gear ring 603. In addition, a plurality of plates are distributed vertically on the framework 601, which can stir and boost the slurry when the filter cartridge rotates.
[0032] On the outside of the framework 601, a scraping element 7 is sleeved. The scraping element 7 comprises a ring body 701 sleeved outside the gear ring 603, and a plurality of spiral blades 703 are welded on the bottom end of the ring body 701 in a ring shape. The outer side surface of the spiral blades 703 closely fits the inner wall of the cylinder 4. An internal gear body 702 is machined on the inner wall of the ring body 701, which is in meshing transmission with the gear ring 603 at the top end of the framework 601 through a gear 8. The entire ring body 701 is supported by the upper end of the cylinder 4.
[0033] The framework 601 is fixedly mounted on a shaft 9, the bottom end of the shaft 9 penetrates downward through the end cover 11 (the sealing is ensured by a mechanical seal) and is provided with a belt pulley 10. Correspondingly, another belt pulley 10 is also mounted on the output shaft of the power element 2, and the two belt pulleys 10 are connected by a belt 12.
[0034] Finally, a drain pipe 301 is formed on the ring seat 3, which is in communication with the cavity one, and is used to drain the heavy impurities deposited at the bottom of the cavity one or to clean the sewage when the equipment needs to be maintained.
[0035] Embodiment two:
[0036] This embodiment describes a slurry purification method using the above device, and the working process is as follows: Feeding and pressure filtration: the slurry to be treated is pumped into the cavity one of the cylinder 4 through the feeding port 401. Since the inner diameter of the feeding port 401 is larger than that of the discharging port 402, and the discharging port 402 has a certain resistance, the slurry will gradually accumulate in the cavity one, causing the internal pressure to rise. Under the action of the pressure difference, the liquid and fine fibers in the slurry are forced to pass through the filter screen 602 of the filter cartridge 6 and enter the cavity two, while the larger impurities are trapped in the cavity one outside the filter screen. The clean slurry entering the cavity two is continuously discharged from the discharge port 1101 on the end cover 11 under the liquid level pressure. When the feeding amount is too large at a moment, the excess slurry in the cavity one will overflow from the highest overflow port 403, thereby maintaining the stability of the system pressure and playing a safety protection role.
[0037] Power driving and centrifugal separation: start the power part 2 (motor), drive the shaft 9 and the entire filter cartridge 6 fixed thereon to start rotating through the transmission of the belt 12 and the belt pulley 10. When the filter cartridge 6 rotates, the vertical plate body on the skeleton 601 drives the slurry in the cavity one to move together, and the large particle impurities in the slurry are thrown to the inner wall of the cylinder 4 under the action of centrifugal force.
[0038] Scraping and slagging: while the filter cartridge 6 rotates, the top gear ring 603 transmits power to the inner tooth body 702 of the scraping part 7 through the gear 8 engaged therewith, thereby driving the ring body 701 and the helical blade 703 below it to produce rotation associated with the filter cartridge 6 (the rotation speed or direction may be different due to the design of the transmission ratio). The rotating helical blade 703 tightly abuts the inner wall of the cylinder 4, continuously scraping and pushing the impurities (including the particles separated by centrifugal force) deposited and accumulated on the inner wall upwards. These impurities pushed to the top are finally discharged from the device through the discharging port 402, realizing continuous separation and removal of the impurities and avoiding blockage of the outer wall of the filter cartridge, thereby ensuring the continuous and stable filtration efficiency.
[0039] Periodically or as needed, the accumulated sludge at the bottom of the cavity one can be discharged through the drain pipe 301 on the ring seat 3, or the system can be cleaned.
[0040] The present application realizes efficient and continuous purification of the slurry by combining "pressure filtration" with "mechanical centrifugation and scraping". The core advantage is that: The scraper driven by the rotation of the filter cartridge can remove the impurities on the outer side of the filter cartridge and the inner wall of the cylinder in real time, and effectively prevent blockage.
[0041] The centrifugal force auxiliary separation strengthens the removal effect of large-particle impurities.
[0042] The design of the overflow port ensures the stability of the internal pressure of the system, and the blowdown pipe is convenient to maintain.
[0043] The whole process is continuously and automatically operated under the driving of the power element, and is suitable for industrial production.
[0044] The preferred embodiments disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited by the claims and the entire scope and equivalents thereof.
Claims
1. A pulp purification device for food packaging paper, comprising a base frame (1), characterized in that: The base frame (1) is equipped with a filter element and a power element (2), and the power element (2) is used to drive the filter element to work. A ring seat (3) is fixed on the base frame (1), and the filter element is installed on the ring seat (3); A cylindrical body (4) is installed on the ring seat (3). The cylindrical body (4) is vertically arranged, with its bottom end fixed to the ring seat (3) and closed, and its top end closed by a cover (5). The outer side of the cylinder (4) is provided with a feed inlet (401), a discharge outlet (402) and an overflow outlet (403) from bottom to top. A filter cartridge (6) is installed inside the cylinder (4), and the filter cartridge (6) divides the interior of the cylinder (4) into cavity one and cavity two; The ring seat (3) has a circular hole, which is closed by an end cap (11). The end cap (11) has a discharge port (1101), which is connected to the cavity. The bottom end of the filter cartridge (6) is fitted into the circular hole.
2. The pulp purification device for food packaging paper according to claim 1, characterized in that: The filter cartridge (6) includes a frame (601) and a filter screen (602) installed inside the frame (601), with the bottom end of the frame (601) fitted into the round hole.
3. The pulp purification device for food packaging paper according to claim 2, characterized in that: The top of the frame (601) is provided with a toothed ring (603), and the frame (601) is provided with a plurality of vertically distributed plates.
4. The pulp purification device for food packaging paper according to claim 3, characterized in that: The outer side of the frame (601) is fitted with a scraper (7), which is located inside the cylinder (4); The scraper (7) includes a ring body (701) sleeved on the outside of the toothed ring (603). The bottom end of the ring body (701) is provided with a plurality of annularly distributed spiral blades (703). The outer side of the spiral blades (703) is attached to the inner wall of the cylinder (4).
5. A pulp purification device for food packaging paper according to claim 4, characterized in that: The inner wall of the ring (701) is provided with an internal tooth body (702), and the internal tooth body (702) and the toothed ring (603) are connected by a gear (8). The ring (701) rests on the upper port of the cylinder (4).
6. The pulp purification device for food packaging paper according to claim 5, characterized in that: The frame (601) is mounted on the shaft (9), and the bottom end of the shaft (9) passes through the end cover (11) and is fitted with a pulley (10). Another pulley (10) is installed on the output end of the power component (2), and the two pulleys (10) are connected by a belt (12).
7. The pulp purification device for food packaging paper according to claim 1, characterized in that: A drain pipe (301) is provided on the ring seat (3), and the drain pipe (301) is connected to the cavity.
8. A method for purifying pulp for food packaging paper, employing the pulp purification apparatus as described in any one of claims 1 to 7, characterized in that, Includes the following steps: The slurry to be filtered is fed into the first chamber through the feed inlet (401); Under the action of pressure difference, the slurry enters the second chamber after being filtered by the filter cartridge (6) and is discharged through the discharge port (1101); Start the power unit (2) to drive the filter cylinder (6) to rotate, so that large particles of impurities in the slurry move towards the inner wall of the cylinder (4) under the action of centrifugal force; The impurities on the inner wall of the cylinder (4) are pushed upward by the spiral blades (703) of the scraper (7) and discharged from the outlet (402).
9. A method for purifying pulp for food packaging paper according to claim 8, characterized in that: When the filter cartridge (6) rotates, the scraper (7) is driven to rotate through the transmission between the toothed ring (603) and the inner tooth body (702), thereby realizing the scraping and pushing functions of the spiral blade (703).
10. A method for purifying pulp for food packaging paper according to claim 9, characterized in that: When the slurry level in cavity 1 exceeds the overflow port (403), the excess slurry overflows from the overflow port (403) to maintain the pressure stability in cavity 1.