A pulp dewatering apparatus to prevent blocking

Abstract

The utility model discloses a kind of paper pulp dewatering equipment of preventing adhesion, it is related to paper pulp dewatering technical field, including rack, shell is installed on rack, inlet passageway is equipped on shell, the outside of shell is equipped with discharge passageway, further include, dewatering component is installed on rack and shell, dewatering component is used to carry out dewatering to paper pulp;And, prevent sticking component is installed on rack and shell, prevent sticking component is used to prevent paper pulp adhesion, by preventing sticking component internal structure cooperation, when paper pulp is adhered in dewatering cylinder inner wall, start water pump, water pump will store water tank inside water and be sprayed by spray head, it is convenient to flush away paper pulp in dewatering cylinder inner wall, to prevent dewatering cylinder blockage can be, simultaneously also can be inhaled by dust filter screen outside air suction pump by control control valve, after being sprayed by spray head, paper pulp is blown down, two different ways can prevent paper pulp adhesion, simultaneously by structure linkage water circulation can be realized, it is convenient to save water resources.

Description

Technical Field

[0001] This utility model relates to the field of pulp dewatering technology, specifically to a pulp dewatering device that prevents sticking. Background Technology

[0002] Pulp dewatering is a core component of the entire papermaking process, and its function extends through every link of the "pulping-papermaking-finished product" chain. It not only directly determines the physical properties of paper, such as tensile strength and density, and affects the continuous operation efficiency of the production line, but is also closely related to enterprise cost control (such as energy consumption in the drying process) and environmental protection indicators (such as wastewater treatment pressure). It is a key process to ensure the quality and efficiency of papermaking.

[0003] However, in actual dewatering processes, due to the inherent viscosity of pulp, some fibers or pulp material tend to adhere to the inner wall of the dewatering cylinder 9. If not handled promptly, the adhered pulp will gradually accumulate and clog the drainage holes on the dewatering cylinder 9. This not only prevents water from draining smoothly during dewatering, directly reducing the efficiency of a single dewatering cycle, but also disrupts the subsequent dewatering rhythm, thereby affecting the quality of wet paper web forming and even causing equipment shutdown for cleaning, resulting in a chain reaction that impacts the stable operation of the entire papermaking production line. Therefore, we propose a pulp dewatering device to prevent adhesion. Utility Model Content

[0004] The purpose of this invention is to provide a pulp dewatering device that prevents adhesion, so as to solve the problems mentioned in the background art.

[0005] This invention solves the problem of pulp sticking during dewatering by combining the internal cleaning and air cleaning modes of the anti-stick component.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pulp dewatering device for preventing adhesion includes a frame, a housing mounted on the frame, a feed channel on the housing, and a discharge channel on the outside of the housing. It also includes a dewatering component mounted on the frame and the housing for dewatering the pulp, and an anti-sticking component mounted on the frame and the housing for preventing the pulp from sticking together.

[0008] Preferably, the dehydration component includes a motor mounted on a frame, the output end of the motor being fixedly connected to a dehydration screw rod through the housing, and a dehydration cylinder being provided outside the dehydration screw rod and inside the housing.

[0009] Preferably, a filter box communicating with the dewatering cylinder is installed at the bottom of the frame, a first filter plate is installed inside the filter box, and a second filter plate is installed below the first filter plate.

[0010] Preferably, the anti-sticking component includes a water tank mounted on the frame, a suction pump installed on one side of the water tank, a T-pipe fixedly connected to the input end of the suction pump, and one end of the T-pipe fixedly connected to and communicating with the water tank.

[0011] Preferably, a dust filter is installed at the end of the three-way pipe away from the water tank, and control valves are symmetrically installed on the outside of the three-way pipe.

[0012] Preferably, the output end of the suction pump is fixedly connected to an output pipe, and the other end of the output pipe is fixedly connected to a ring pipe. The ring pipes are arranged along the outside of the dehydration cylinder, and a connecting pipe is provided between the multiple ring pipes. A nozzle is installed on the inner side of each of the multiple ring pipes.

[0013] Preferably, a return pipe communicating with the filter box is installed on the outside of the filter box, and the other end of the return pipe is fixedly connected to and communicating with the water storage tank. A drain valve is installed on the outside of the return pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model is equipped with an anti-sticking component. Through the cooperation of the internal structure, when the pulp sticks to the inner wall of the dewatering cylinder, the water pump is started. The water pump sprays the water in the water tank through the nozzle, which makes it easy to wash away the pulp in the dewatering cylinder, thereby preventing the dewatering cylinder from clogging. At the same time, the dust filter outside the air suction pump can be sucked in by controlling the control valve and sprayed out through the nozzle to blow the pulp off. Both different methods can prevent the pulp from sticking.

[0016] At the same time, the water extracted from the pulp is filtered and then transported back to the storage tank through a return pipe, which enables water circulation and helps to save water resources. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of the present utility model. Figure 2 ;

[0019] Figure 3 This is a front view of the overall structure of this utility model;

[0020] Figure 4 This is a side view of the overall structure of this utility model;

[0021] Figure 5 This is a cross-sectional view of the overall structure of this utility model;

[0022] Figure 6 This is a top view of the overall structure of this utility model;

[0023] In the diagram: 1. Frame; 2. Outer shell; 3. Feed channel; 4. Discharge channel; 5. Dewatering component; 6. Anti-stick component; 7. Motor; 8. Dewatering screw; 9. Dewatering cylinder; 10. Filter box; 11. First filter plate; 12. Second filter plate; 13. Water tank; 14. Suction pump; 15. T-connector; 16. Dustproof filter screen; 17. Control valve; 18. Output pipe; 19. Ring pipe; 20. Through pipe; 21. Nozzle; 22. Return pipe; 23. Drain valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 This utility model provides a technical solution: a pulp dewatering device to prevent adhesion, including a frame 1 made of Q235 low-carbon steel, which has high strength, good plasticity and weldability, and can meet the overall load-bearing requirements of the equipment. A shell 2 is installed on the frame 1, made of 304 stainless steel. 304 stainless steel has excellent corrosion resistance, heat resistance and hygiene properties, and is not prone to bacterial growth, meeting the hygiene requirements of pulp processing. The shell 2 is provided with a feed channel 3, the inner diameter of which gradually narrows from the inlet end to the end connecting with the shell 2, forming a conical structure. This design... This design allows the pulp to gradually accelerate during transport, entering the equipment evenly and preventing it from accumulating and clogging in the feed channel 3. The outer casing 2 has a discharge channel 4. Both the feed channel 3 and discharge channel 4 are made of the same material as the casing 2, 304 stainless steel, ensuring overall material consistency and corrosion resistance, and preventing corrosion damage at the joints due to material differences. Simultaneously, the inner wall of the discharge channel 4 has a wear-resistant coating made of tungsten carbide. Tungsten carbide has extremely high hardness and wear resistance, effectively resisting wear on the inner wall of the discharge channel 4 during transport and extending its service life. A dewatering component 5 is installed on the frame 1 and casing 2 to dewater the pulp; and an anti-sticking component 6 is also installed on the frame 1 and casing 2 to prevent the pulp from sticking together.

[0026] Meanwhile, the dewatering component 5 includes a motor 7 mounted on the frame 1. The motor 7 is a variable frequency speed control motor, equipped with a dedicated variable frequency control cabinet. The operator can adjust the speed of the motor 7 through the variable frequency control cabinet according to parameters such as the type and concentration of pulp, thereby controlling the rotation speed of the dewatering screw 8 and achieving precise control of the pulp dewatering speed. The output end of the motor 7 is fixedly connected to the dewatering screw 8 through the outer shell 2 via a coupling. The screw blades are made of duplex stainless steel, which combines the advantages of austenitic stainless steel and ferritic stainless steel. It has high strength, high corrosion resistance and good wear resistance, and can withstand large torque and pressure during pulp dewatering. At the same time, it resists the corrosion of chemicals in the pulp and the wear of pulp particles. A dewatering cylinder 9 is provided outside the dewatering screw 8 and inside the outer shell 2. The edges of the screw blades are finely polished to make the surface smooth, reducing the adhesion of pulp to the blade surface and preventing the blade edges from scratching the inner wall of the dewatering cylinder 9. The gap between the dewatering screw 8 and the dewatering cylinder 9 is controlled between 0.5 and 1 mm. Too small a gap can lead to wear on both, while too large a gap can cause pulp leakage, affecting the dewatering effect. This gap design ensures dewatering while reducing component wear. Drainage holes are evenly spaced on the dewatering cylinder 9, with chamfered inner walls to prevent sharp edges from scratching the pulp fibers and to reduce pulp adhesion at the hole edges. Mechanical seals are used between both ends of the dewatering cylinder 9 and the outer casing 2. The seals are made of polytetrafluoroethylene (PTFE) to effectively prevent pulp and water generated during dewatering from leaking from both ends of the dewatering cylinder 9, ensuring the equipment's airtightness.

[0027] Please see Figure 1 - Figure 6This utility model provides a technical solution: a pulp dewatering device to prevent adhesion. A filter box 10, communicating with a dewatering cylinder 9, is installed at the bottom of the frame 1. Its volume is determined according to the dewatering capacity of the device, ensuring that the water produced during dewatering has sufficient residence time within the filter box 10 to fully complete the filtration process. An inspection port is provided on the outside of the filter box 10, equipped with a sealing cover. The sealing cover is sealed to the filter box 10 by a rubber sealing ring, facilitating periodic opening by operators to clean, replace, and maintain the first filter plate 11 and the second filter plate 12 inside the filter box 10. The first filter plate 11 is installed inside the filter box 10, and the second filter plate 12 is installed below the first filter plate 11. Both the first filter plate 11 and the second filter plate 12 are detachable and connected to the filter box 10 via slots, facilitating quick disassembly and installation by operators. The first filter plate 11 is made of polypropylene, which has good corrosion resistance, chemical resistance, and low density, making it lightweight and easy to install and replace. The first filter plate 11 has a pore size of 50-100μm and is mainly used to filter larger particles of pulp fibers and impurities in dewatered wastewater. The second filter plate 12 is made of polytetrafluoroethylene (PTFE), which has excellent corrosion resistance, high temperature resistance, and an extremely low surface friction coefficient, making it less prone to impurity adhesion. With a pore size of 10-20μm, it is used to further filter out fine particulate impurities and some chemical substances that were not filtered out by the first filter plate 11, thereby improving the purity of the filtered water.

[0028] Furthermore, the anti-sticking component 6 includes a water tank 13 mounted on the frame 1. The water tank 13 is equipped with a level sensor that monitors the water level in real time and transmits the signal to the control system. When the water level is below the set value, the control system automatically opens the inlet valve to add new water; when the water level is above the set value, it automatically closes the inlet valve, achieving automatic water level control. A suction pump 14 is installed on one side of the water tank 13. The suction pump 14 is a self-priming centrifugal pump with strong self-priming capability, stable flow rate, and high head, ensuring normal water intake even when the water level in the water tank 13 is low, providing stable water pressure to the anti-sticking component 6. A three-way pipe 15 is fixedly connected to the input end of the suction pump 14. The three-way pipe 15 is made of 304 stainless steel, possessing good corrosion resistance and strength, and can withstand the pressure of liquid or gas during the suction pump 14's transport process, preventing pipe corrosion or rupture. One end of the three-way pipe 15 is fixedly connected to and communicates with the water tank 13.

[0029] It should be noted that a dust filter 16 is installed at the end of the three-way pipe 15 away from the water tank 13. The dust filter 16 is made of stainless steel woven mesh with a mesh size of 50-100μm, which can effectively filter dust and impurities in the air and prevent them from entering the pipes of the suction pump 14 and the anti-sticking component 6, causing pipe blockage or component wear. Control valves 17 are symmetrically installed on the outside of the three-way pipe 15.

[0030] In addition, the output end of the suction pump 14 is fixedly connected to the output pipe 18, and the other end of the output pipe 18 is fixedly connected to the ring pipe 19. The output pipe 18, the ring pipe 19 and the through pipe 20 are all made of 304 stainless steel to ensure corrosion resistance and strength, meet the needs of long-term water or air transportation, and avoid pipeline corrosion damage. The ring pipes 19 are arranged along the outside of the dehydration cylinder 9, and the through pipe 20 is provided between multiple ring pipes 19. The nozzles 21 are installed on the inside of multiple ring pipes 19. The nozzles 21 and the ring pipes 19 are connected by threads. When the nozzles 21 are blocked or damaged, new nozzles 21 can be quickly replaced to ensure that the anti-sticking component 6 works normally. The through pipe 20 connects multiple ring pipes 19 into a whole, so that water or air can be evenly distributed to each ring pipe 19, ensuring that the spray pressure and flow rate of each nozzle 21 are consistent. Nozzle 21 adopts a fan-shaped spray nozzle with a nozzle angle of 90-120°, which can spray evenly and effectively expand the spray range, enhancing the flushing or blowing effect on the wallpaper pulp inside the dewatering cylinder 9. A return pipe 22 connected to the filter box 10 is installed on the outside of the filter box 10. The other end of the return pipe 22 is fixedly connected to and connected to the water storage tank 13. A drain valve 23 is installed on the outside of the return pipe 22. The drain valve 23 can control the flow direction of water and can directly discharge water to the outside of the filter box 10.

[0031] The working principle of this device is as follows:

[0032] First, the pulp enters the equipment through the feed channel 3. The conical structure of the feed channel 3 ensures that the pulp flows evenly and stably into the dewatering cylinder 9. The operator starts the motor 7 and sets the speed according to the pulp characteristics to control the rotation of the dewatering screw 8. At the same time, the water level in the water tank 13 is checked, and water is automatically replenished if it is insufficient. During dewatering, the dewatering screw 8 with a gradually decreasing pitch pushes the pulp. The squeezing pressure gradually increases as the pitch decreases, squeezing out the free water in the pulp. The water flows into the filter box 10 through the drain hole of the dewatering cylinder 9. After passing through the first filter plate 11 and the second filter plate 12, larger fibers and fine impurities are filtered out in sequence to obtain reclaimed water with higher purity.

[0033] During the dewatering process, the anti-sticking component 6 operates synchronously: In the default mode, the suction pump 14 draws water from the water tank 13, and sprays high-pressure water from the nozzle 21 through the output pipe 18 and the ring pipe 19 to flush away the fibers adhering to the inner wall of the dewatering cylinder 9; when processing high-viscosity pulp or for regular cleaning, the control valve 17 is switched, and the suction pump 14 draws in air filtered by the dust filter 16, using high-speed airflow to clean the cylinder wall of the dewatering cylinder 9 to prevent secondary fiber adhesion. After dewatering, the wet pulp is pushed into the discharge channel 4 by the dewatering screw 8. The operator adjusts the flow valve to control the discharge speed. The wear-resistant coating on the inner wall of the discharge channel 4 and the nozzle 21 assist in flushing to prevent pulp adhesion and accumulation.

[0034] The reclaimed water in filter box 10 is returned to storage tank 13 for recycling through return pipe 22. When the water quality declines, drain valve 23 can be opened to discharge some wastewater and replenish fresh water. The inspection port of filter box 10 is opened periodically to collect pulp fibers on the first filter plate 11 and the second filter plate 12 for reuse in pulping. Before the equipment is shut down, the dewatering screw 8 continues to run to discharge residual pulp, the air cleaning mode is switched to clean the wall of the dewatering cylinder 9, the motor 7 is turned off, the drain port of filter box 10 is opened to discharge impurities, and at the same time the gap between the dewatering screw 8 and the dewatering cylinder 9 is checked, the dust filter 16 and the nozzle 21 are cleaned, and the damaged first filter plate 11 or second filter plate 12 is replaced to ensure normal operation the next time the machine is started.

[0035] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0036] It is understood that this utility model is described through some embodiments, and as those skilled in the art will know, various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, modifications to these features and embodiments can be made to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A pulp dewatering device for preventing sticking, comprising a frame (1), a housing (2) mounted on the frame (1), a feeding channel (3) provided on the housing (2), and a discharge channel (4) provided on the outside of the housing (2); Its features are, Also includes: A dewatering component (5) is installed on the frame (1) and the housing (2), the dewatering component (5) being used to dewater the pulp; as well as, An anti-sticking component (6) is installed on the frame (1) and the housing (2) to prevent the pulp from sticking together.

2. The pulp dewatering equipment for preventing adhesion according to claim 1, characterized in that: The dehydration component (5) includes a motor (7) mounted on a frame (1). The output end of the motor (7) is fixedly connected to a dehydration screw rod (8) through the outer shell (2). A dehydration cylinder (9) is provided outside the dehydration screw rod (8) and inside the outer shell (2).

3. The pulp dewatering equipment for preventing adhesion according to claim 2, characterized in that: The bottom of the frame (1) is equipped with a filter box (10) that communicates with the dewatering cylinder (9). The filter box (10) is equipped with a first filter plate (11) and a second filter plate (12) is installed below the first filter plate (11).

4. The pulp dewatering equipment for preventing adhesion according to claim 1, characterized in that: The anti-stick component (6) includes a water tank (13) installed on the frame (1). A suction pump (14) is installed on one side of the water tank (13). A three-way pipe (15) is fixedly connected to the input end of the suction pump (14). One end of the three-way pipe (15) is fixedly connected to and communicates with the water tank (13).

5. The pulp dewatering equipment for preventing adhesion according to claim 4, characterized in that: A dust filter (16) is installed at the end of the three-way pipe (15) away from the water tank (13), and control valves (17) are symmetrically installed on the outside of the three-way pipe (15).

6. The pulp dewatering equipment for preventing adhesion according to claim 5, characterized in that: The output end of the suction pump (14) is fixedly connected to an output pipe (18), and the other end of the output pipe (18) is fixedly connected to a ring pipe (19). The ring pipes (19) are arranged along the outside of the dehydration cylinder (9), and a through pipe (20) is provided between the multiple ring pipes (19). A nozzle (21) is installed on the inner side of each of the multiple ring pipes (19).

7. The pulp dewatering equipment for preventing adhesion according to claim 3, characterized in that: The filter box (10) is equipped with a return pipe (22) that communicates with the filter box (10). The other end of the return pipe (22) is fixedly connected to and communicates with the water storage tank (13). A drain valve (23) is installed on the outside of the return pipe (22).

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