High-dryness rotary drum type shoving device

Abstract

The utility model discloses a high dryness rotary drum type shoving device, which comprises a rack, a rotary drum, a squeezing device, an upper net and a lower net, the rotary drum is arranged on the rack, the upper net and the lower net are respectively guided by a net blanket guide roller, the upper net and the lower net are matched with the rotary drum to clamp slurry, the squeezing device is fixed on the rack, and the squeezing device is fixed on the rack. The squeezing device comprises a first squeezing device, a second squeezing device and a third squeezing device which are arranged on the left side of the rotary drum, the first squeezing device, the second squeezing device and the third squeezing device are sequentially arranged at the lower position, the middle position and the upper position in the rotating direction of the rotary drum, and the lower net surface of the right side of the rotary drum is used for slurry feeding. A transmission device for driving the rotary drum to rotate is arranged on the side surface of the rack; through sequential arrangement and optimal design of the multiple stages of squeezing devices, the dryness of the slurry can be improved stage by stage, and the main squeezing device is matched, so that the dehydration effect is remarkably improved, and the water content of the slurry is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pulping and papermaking equipment, in particular to a high-dryness rotary drum type pulp squeezing device. Background Art

[0002] The traditional papermaking industry is a key industry for pollution emissions and a major energy consumer. For a long time, China's pulp and papermaking enterprises that mainly use non-wood raw materials have generally been small in scale and relatively backward in equipment. The level of wastewater pollution control lags far behind the world average, and there are many problems. It is one of the main sources of pollution. Under the background of carbon peak and carbon neutrality, my country has strengthened its efforts in energy conservation, emission reduction, water environment management and protection. The equipment used for filtering, squeezing and drying pulp in the pulping process has become the key to the survival of enterprises, and improving the dryness of pulp is imminent. At present, traditional pulp dewatering devices mostly use simple roller pressing or mechanical filtration methods, which are generally composed of upper and lower pressing rollers, upper net, lower net, mesh correction device, frame and transmission device. The pressing rollers are arranged in the horizontal direction. Although a certain degree of water removal can be achieved, due to the limitations of its equipment design, the dewatering efficiency is low. The pulp is prone to loosening or uneven clamping during operation, resulting in insufficient dehydration. At the same time, the pulp may affect the overall efficiency of the dewatering device due to position offset. Moreover, the horizontally arranged structure not only occupies space, but also has low operating efficiency.

[0003] In response to the above technical problems, a research and development plan was formulated. By developing a high-concentration pulp double-roller high-pressure dewatering device to solve the shortcomings of the existing technology, a high-dryness rotary drum pulping device was proposed. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a high-dryness rotary drum pulping device. Through the sequential arrangement and optimized design of the multi-stage pressing device, the pulp dryness can be improved step by step, and in conjunction with the main pressing device, the dehydration effect can be significantly improved, and the moisture content of the pulp can be reduced, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-dryness rotary drum pulping device, comprising a frame, a rotary drum, a pressing device, an upper screen and a lower screen, the rotary drum is installed on the frame, the upper screen and the lower screen are respectively guided by the mesh guide rollers, the upper screen and the lower screen cooperate with the rotary drum to clamp the pulp, the pressing device is fixed on the frame, the pressing device comprises a No. 1 press, a No. 2 press and a No. 3 press, and is arranged on the left side of the rotary drum, the No. 1 press, the No. 2 press and the No. 3 press are arranged in three positions in the order of lower, middle and upper in the direction of rotation of the rotary drum, the lower screen surface on the right side of the rotary drum is used for pulp feeding, the rear end of the No. 3 press is provided with a main pressing device, and the side of the frame is provided with a transmission device for driving the rotary drum to rotate.

[0006] Furthermore, the top and side surfaces of the frame are respectively provided with a synchronous tensioning device and an online tensioning device, which act on the upper and lower nets respectively. The synchronous tensioning device and the online tensioning device have the same structure. The synchronous tensioning device includes a tensioning cylinder, a gear, a guide column and a guide bracket. The guide bracket and the tensioning cylinder are respectively fixed on the frame. The guide column passes through the guide bracket and is fixedly connected to the bearing of the mesh guide roller. The guide column is engaged with the gear fixedly mounted on the guide bracket, and the telescopic end of the tensioning cylinder is connected to the guide column.

[0007] Furthermore, a transmission device is installed on the bottom side of the frame, and the transmission device includes a reduction motor and a gear transmission structure, and the gear transmission structure is engaged with the large gear ring on the drum.

[0008] Furthermore, the structures of the No. 1 press, the No. 2 press and the No. 3 press are the same, and are all connected to the small pneumatic tire bracket through the cylinder support, the small pneumatic tire bracket is fixed on the frame, and the cylinder support is fixed on the small pneumatic tire bracket.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. Through the sequential arrangement and optimized design of the multi-stage pressing device, the pulp dryness can be improved step by step, and in conjunction with the main pressing device, the dehydration effect can be significantly improved and the moisture content of the pulp can be reduced.

[0011] 2. Through the coordinated operation of one drum and three presses, the overall size of the equipment is effectively reduced. The layout of each component is compact, the footprint is small and the operating efficiency is high, which is suitable for large-scale pulping production.

[0012] 3. The upper and lower nets should maintain appropriate tension and running trajectory with the cooperation of the tensioning device to avoid loosening or position displacement of the slurry and ensure the uniformity and efficiency of the dehydration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 3 This is a left-side structural diagram of the present utility model;

[0016] Figure 4 This is the axonometric drawing of the utility model;

[0017] Figure 5 It is a schematic diagram of the top structure of the utility model.

[0018] In the figure: 1 synchronous tensioning device, 2 small pneumatic tire support, 3 cylinder support, 4 main press lower support, 5 upper screen, 6 lower screen, 7 frame, 8 drum, 9 No. 1 press, 10 No. 2 press, 11 No. 3 press, 12 upper screen tensioning device, 13 net correction device, 14 net guide roller, 15 main press device, 16 transmission device, 17 tensioning cylinder, 18 gear, 19 guide column, 20 guide bracket. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0020] See also Figure 1-5The utility model provides a technical solution: a high-dryness rotary drum pulping device, including a frame 7, a rotary drum 8, a pressing device, an upper screen 5 and a lower screen 6. The rotary drum 8 is installed on the frame 7 to support the various components of the device and provide stability of the overall structure; it is driven to rotate by a transmission device 16, and a plurality of small compartments are arranged on the periphery for preliminary dehydration of the pulp, and the water is discharged through the small compartments. The rotary drum 8 is a hollow structure, which can reduce weight and facilitate drainage. This structure is a conventional structure, and the shape of the small compartments on the periphery is different from that of the conventional structure. The arrangement is set according to the situation and will not be described in detail here; the upper screen 5 and the lower screen 6 are guided by the mesh guide roller 14 respectively, and the upper screen 5 and the lower screen 6 cooperate with the drum 8 to clamp the pulp, and move synchronously along the surface of the drum 8 under the drive of the transmission device 16 to realize pulp transportation and dehydration; the pressing device is fixed on the frame 7, and the pressing device includes a No. 1 press 9, a No. 2 press 10 and a No. 3 press 11, and is arranged on the left side of the drum 8. The No. 1 press 9, the No. 2 press 10 and the No. 3 press 11 are pressed down, middle and There are three positions in the upper sequence. The No. 1 press 9 is used for preliminary squeezing of the pulp to remove excess water. The No. 2 press 10 and the No. 1 press 9 are arranged in sequence upward along the rotation direction of the drum 8, and are used to further squeeze the pulp. The No. 3 press 11 is arranged in sequence upward along the rotation direction of the drum 8 to perform deep dehydration to increase the pulp dryness to about 30%. The surface of the lower mesh 6 on the right side of the drum 8 is used for pulp feeding. The frame 7 provides an installation base for the drum 8, the squeezing device, the mesh guide roller 14, etc. The rear end of the No. 3 press 11 is set There is a main pressing device 15, which completes the final dehydration stage of the pulp through high-pressure extrusion technology to make the dryness reach more than 40%. The main pressing device 15 includes an upper pressing roller and a lower pressing roller. The lower pressing roller is installed on the frame 7 through a bearing shaft, and the upper pressing roller is connected to the small pneumatic bracket 2 through a cylinder support 3. The pressing roller is responsible for applying pressure to the pulp to complete the dehydration operation. This part is an existing conventional structure and will not be described in detail here. A transmission device 16 for driving the drum 8 to rotate is provided on the side of the frame 7.

[0021] The top and side surfaces of the frame 7 are respectively provided with a synchronous tensioning device 1 and an online tensioning device 12. The synchronous tensioning device 1 is used to apply tensioning force to maintain the tension state of the net, thereby ensuring smooth and clamped transmission of the slurry. The synchronous tensioning device 1 and the online tensioning device 12 act on the upper net 5 and the lower net 6 respectively. The synchronous tensioning device 1 and the online tensioning device 12 have the same structure. The synchronous tensioning device 1 includes a tensioning cylinder 17, a gear 18, a guide column 19 and a guide bracket 20. The guide bracket 20 and the tensioning cylinder 1 7 are respectively fixed on the frame 7, the guide post 19 passes through the guide bracket 20 and is fixedly connected to the bearing of the net carpet guide roller 14, the guide post 19 is engaged with the gear fixedly mounted on the guide bracket 20, the telescopic end of the tensioning cylinder 17 is connected to the guide post 19, and the extension and contraction of the tensioning cylinder 17 can drive the guide post 19 to move, thereby driving the net carpet guide roller 14 to move, thereby adjusting the tension state of the net carpet. The installation position of the tensioning device is set accordingly according to the actual situation and the structure of the frame 7, and will not be described in detail here.

[0022] The transmission device 16 is installed on the bottom side of the frame 7. The transmission device 16 includes a reduction motor and a gear transmission structure. The gear transmission structure engages with the large ring gear on the drum 8. The transmission device 16 efficiently transmits power to the drum 8, the mesh and the pressing device, realizing the synchronous and coordinated operation of various moving parts. During operation, through frequency conversion speed regulation, tension adjustment and intelligent control system, the stability, flexibility and efficiency of power output are guaranteed, providing reliable power support for the efficient dehydration operation of the whole machine.

[0023] Press No. 1 9, press No. 2 10 and press No. 3 11 have the same structure and are all connected to the small tire bracket 2 through the cylinder support 3. The small tire bracket 2 is fixed on the frame 7. The cylinder support 3 is fixed on the small tire bracket 2. The elastic structure of the small tire bracket 2 provides flexible support for the cylinder support 3, which can buffer the upper and lower pressures applied by the cylinder and reduce the mechanical stress concentration of the equipment caused by high-pressure impact. The cylinder support 3 fixes the lower end of the cylinder, and the piston rod of the cylinder is directly connected to the pressing roller. A complete force transmission and support system is formed between the small tire bracket 2, the pressing roller, the cylinder support 3 and the frame 7. The small tire bracket 2 provides elastic support and pressure buffering, and the cylinder support 3 provides rigid fixation for the cylinder and the pressing roller. The pressing completes the task of pulp dehydration, and the frame 7 serves as the basic support frame of the entire system, bearing all loads and ensuring the operational stability of the equipment.

[0024] The small pneumatic tire bracket 2 is a key support and buffer component in the high-dryness rotary drum pulping device. It consists of a pneumatic tire body, a bracket frame and a gas control system. Its main function is to provide a stable installation base for the cylinder support 3, and to absorb and alleviate the impact force and vibration generated by the pressing device during high-pressure operation through the elastic characteristics of the pneumatic tire. The internal air pressure of the pneumatic tire body is adjustable, and the bracket frame is fixed to the frame 7 by bolts to ensure that the entire system maintains stability and durability under high load conditions. The small pneumatic tire bracket 2 not only protects the frame and equipment from damage caused by high-pressure impact, but also improves the operating stability and life of the pressing device through dynamic buffering. It is an important basic component to ensure efficient dehydration operation of the equipment.

[0025] The mesh correction device 13 consists of a guide roller, a detection device, a movable bracket, a drive mechanism, and fixed components. The guide roller is used to adjust the running trajectory of the mesh belt. The detection device monitors mesh belt deviation in real time. The movable bracket supports the guide roller and allows its position to be adjusted. The drive mechanism, such as a cylinder or electric push rod, drives the guide roller for dynamic correction based on the detection signal. The fixed components firmly mount the correction device on the frame 7. The function of this device is to prevent mesh belt deviation, slack, or wrinkles by adjusting the running trajectory of the upper and lower meshes 5 and 6 in real time, thereby ensuring that the slurry remains stably clamped during the dewatering process, improving the smooth operation of the equipment and dewatering efficiency, and extending the service life of the mesh belt. This part is prior art and will not be described here.

[0026] The mesh guide roller 14 is connected with the upper mesh 5, the lower mesh 6, the frame 7, the mesh tensioning device 1, the mesh correction device 13 and the drum 8 to form a stable mesh belt guiding and supporting system, ensuring that the mesh belt runs smoothly and has an accurate trajectory. The mesh guide roller 14 is a key component in the high-dryness rotary drum pulping device. It is mainly used to guide the upper mesh 5 and the lower mesh 6 to run along a fixed trajectory, ensuring that the mesh belt runs smoothly and is tightly clamped with the pulp. The guide roller is usually made of high-strength wear-resistant material, such as stainless steel or aluminum alloy. Its surface is precisely processed and has smooth and non-slip properties to reduce mesh belt friction and wear; the mesh guide roller 14 is set At multiple key positions in the mesh belt's running path, including the entrance for guiding the mesh belt into the pressing area, the exit for ensuring smooth discharge of the pressed pulp, the tensioning area and the mesh tensioning device 1 for adjusting the mesh belt tension, the correction area and the mesh correction device 13 for correcting the mesh belt offset, and the return part for maintaining the closed-loop operation of the mesh belt. In addition, the guide roller is also arranged at the position where the mesh belt enters the wrapping area of ​​the drum 8 to ensure that the mesh belt fits tightly with the drum surface, thereby improving the pulp dewatering efficiency. Its reasonable layout not only prevents the mesh belt from deflecting, loosening or slipping, but also extends the service life of the mesh belt, ensuring the efficiency and stability of the pulp dewatering process.

[0027] The working principle is to achieve efficient dehydration of the pulp by utilizing the synergistic effect of the drum 8, the mesh belt system and the multi-stage pressing device. The pulp is evenly distributed on the lower net 6 with an initial dryness of 4-8%. It is clamped by the upper net 5 and the lower net 6 and then enters the surface of the drum 8. The closed dehydration area formed by the small grid bin completes the initial dehydration during the rotation of the drum and discharges free water. Then the pulp passes through the No. 1 press 9, the No. 2 press 10 and the No. 3 press 11 in turn. The multi-stage pressure increases gradually, squeezing out capillary water and part of the bound water respectively, so that the pulp dryness is increased to about 30%. Finally, the pulp enters the main pressing device 15 for deep dehydration under high pressure. The buffering design of the small pneumatic tire bracket 2 and the cylinder support 3 ensures uniform pressure distribution. The pulp dryness finally reaches more than 40%. The tensioning device maintains appropriate tension of the mesh belt. The transmission device 16 dynamically controls the running speed of the drum and the pressing device through variable frequency speed regulation technology to achieve improved dehydration efficiency and optimized energy consumption, while ensuring long-term stable operation of the equipment.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Without departing from the spirit and scope of the present invention, the present invention may also have various changes and improvements, which fall within the scope of the present invention to be protected.

Claims

1. A high-dryness rotary drum pulping device, comprising a frame (7), a rotary drum (8), a pressing device, an upper screen (5) and a lower screen (6), characterized in that: The drum (8) is mounted on a frame (7). The upper net (5) and the lower net (6) are guided by the blanket guide rollers (14) respectively. The upper net (5) and the lower net (6) cooperate with the drum (8) to clamp the pulp. The pressing device is fixed on the frame (7). The pressing device includes a No. 1 press (9), a No. 2 press (10) and a No. 3 press (11), and is arranged on the left side of the drum (8). The No. 1 press (9), the No. 2 press (10) and the No. 3 press (11) are arranged at three positions in the order of lower, middle and upper in the rotation direction of the drum (8). The surface of the lower net (6) on the right side of the drum (8) is used for pulp feeding. The rear end of the No. 3 press (11) is provided with a main pressing device (15). The side of the frame (7) is provided with a transmission device (16) for driving the drum (8) to rotate.

2. The high-dryness rotary drum pulping device according to claim 1, characterized in that: The top surface and side surface of the frame (7) are respectively provided with a synchronous tensioning device (1) and an upper screen tensioning device (12). The synchronous tensioning device (1) and the upper screen tensioning device (12) act on the upper screen (5) and the lower screen (6) respectively. The synchronous tensioning device (1) and the upper screen tensioning device (12) have the same structure. The synchronous tensioning device (1) includes a tensioning cylinder (17), a gear (18), a guide column (19) and a guide bracket (20). The guide bracket (20) and the tensioning cylinder (17) are respectively fixed on the frame (7). The guide column (19) passes through the guide bracket (20) and is fixedly connected to the bearing of the net guide roller (14). The guide column (19) is engaged with a gear fixedly mounted on the guide bracket (20). The telescopic end of the tensioning cylinder (17) is connected to the guide column (19).

3. The high-dryness rotary drum pulping device according to claim 1, characterized in that: The transmission device (16) is installed on the bottom side of the frame (7), and the transmission device (16) includes a reduction motor and a gear transmission structure, and the gear transmission structure is engaged with the large gear ring on the drum (8).

4. The high-dryness rotary drum pulping device according to claim 1, characterized in that: The No. 1 press (9), the No. 2 press (10) and the No. 3 press (11) have the same structure and are all connected to the small pneumatic tire bracket (2) through the cylinder support (3). The small pneumatic tire bracket (2) is fixed on the frame (7), and the cylinder support (3) is fixed on the small pneumatic tire bracket (2).

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