Squeezing structure of pulp washer

Abstract

The utility model discloses a squeezing structure of a pulp washer. The squeezing structure comprises a machine shell, a pulp inlet assembly and a squeezing assembly. Two pulp inlet cavities and two squeezing cavities are formed in the machine shell; each slurry inlet cavity is internally provided with one slurry inlet assembly; the slurry inlet assembly is rotatably arranged in the slurry inlet cavity, and a slurry inlet channel is formed between the slurry inlet assembly and the inner wall of the slurry inlet cavity; the squeezing assembly comprises two compression rollers, the compression rollers are rotatably arranged in the corresponding soybean milk inlet cavities, and squeezing channels are formed by the compression rollers and the inner walls of the soybean milk inlet cavities; the pulp inlet channel is communicated with the squeezing channel, and the width of the pressing roller is gradually reduced in the rotating direction of the squeezing assembly. The pulp squeezing device can improve the pulp squeezing efficiency and the pulp cleaning rate.

Description

Technical Field

[0001] The utility model relates to the technical field of paper pulp pressing, in particular to a pressing structure of a pulp washer. Background Art

[0002] At present, double-roller press washers are mostly used in the field of papermaking technology, which use a pulp inlet pipe to feed pulp on the side wall of the press roll. This pulp feeding method will result in insufficient washing area, which in turn leads to low washing efficiency. At the same time, due to the large structural resistance of the pulp inlet pipe and the short pulp inlet channel, there is a problem of easy pulp jam. For example, in the Chinese utility model patent with publication number CN2500704Y, the inlet of the pulp inlet flow channel is located in the horizontal direction and the length of the pulp inlet flow channel is less than half of the circumference of the press roll. The pulp inlet flow channel is short and the structural design is unreasonable, resulting in low pulp washing efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a squeezing structure of a pulp washer to improve the pulp washing efficiency.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A pressing structure of a pulp washer, comprising a casing, a pulp feeding assembly and a pressing assembly;

[0006] The casing is provided with two pulp inlet cavities and two pressing cavities;

[0007] A slurry inlet assembly is disposed in each slurry inlet cavity;

[0008] The slurry inlet assembly is rotatably disposed in the slurry inlet cavity and forms a slurry inlet passage between the inner wall of the slurry inlet cavity;

[0009] The pressing assembly includes two pressing rollers, which are rotatably disposed in the corresponding pulp inlet cavity and form a pressing channel with the inner wall of the pulp inlet cavity;

[0010] The pulp inlet channel is communicated with the pressing channel, and the width of the pressing channel gradually decreases along the rotation direction of the pressing roller.

[0011] Furthermore, the pulp inlet channel is connected to the pressing channel via a transition channel.

[0012] Furthermore, in the vertical direction, the starting end of the pressing channel is located above the pressing assembly, and the length of the pressing channel is 0.6 to 0.75 of the circumference of the pressing roller.

[0013] Furthermore, the width of the slurry inlet channel is 10 mm to 20 mm.

[0014] Furthermore, a slurry inlet is provided on the casing, and an angle of 130° to 140° is formed between the axis of the slurry inlet and the feeding direction of the transition flow channel.

[0015] Furthermore, an extrusion channel is formed between the two pressing rollers, and the discharge ends of the two pressing channels are connected to the extrusion channel.

[0016] Further, the pressing assembly also includes two driving members;

[0017] The driving member is drivingly connected to the pressure roller.

[0018] The beneficial effect of the utility model is that the utility model forms a pressing channel and gradually reduces the width of the pressing channel along the rotation direction of the pressing roller, thereby improving the pressing efficiency and the dehydration rate. In the process of slurry pressing, the slurry can be slowly pressed to avoid excessive slurry pressing pressure due to the small width of the pressing channel, which affects the normal operation of the pressing roller. By setting a slurry feeding component to form a slurry feeding channel with the slurry feeding cavity, the slurry feeding pressure is increased, and the slurry feeding smoothness is ensured. Even if the pressing channel is gradually reduced, the slurry can be smoothly fed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the pressing structure of the pulp washer in the utility model;

[0020] Figure 2 for Figure 1 A magnified view of part A;

[0021] Figure 3 for Figure 1 A magnified view of part B;

[0022] Figure 4 for Figure 1 Enlarged view of part C;

[0023] Description of labels:

[0024] 1. Casing; 11. Discharge cavity; 111. Discharge channel; 12. Slurry inlet cavity; 121. Slurry inlet channel; 13. Pressing cavity; 131. Pressing channel; 132. First washing port; 133. Second washing port; 14. Transition flow channel; 15. Slurry inlet; 16. Slurry outlet; 17. Extrusion channel;

[0025] 2. Slurry inlet assembly;

[0026] 3. Pressing assembly; 31. Pressing roller; 311. Drainage channel. DETAILED DESCRIPTION

[0027] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0028] Please refer to Figure 1-Figure 4 A pressing structure of a pulp washer comprises a casing 1, a pulp feed assembly 2 and a pressing assembly 3; the casing 1 is provided with a discharge cavity 11, two pulp feed cavities 12 and two pressing cavities 13; each pulp feed cavity 12 is provided with a pulp feed assembly 2; the pulp feed assembly 2 is rotatably arranged in the pulp feed cavity 12 and forms a pulp feed channel 121 with the inner wall of the pulp feed cavity 12; the pressing assembly 3 comprises two pressing rollers 31, the pressing rollers 31 are rotatably arranged in the corresponding pulp feed cavity 12 and form a pressing channel 131 with the inner wall of the pulp feed cavity 12; the pulp feed channel 121 is connected with the pressing channel 131, and the width of the pressing roller 31 gradually decreases along the rotation direction of the pressing assembly 3.

[0029] It can be understood that, in the present invention, by forming a pressing channel 131 and gradually reducing the width of the pressing channel 131 along the rotation direction of the pressing roller 31, the pressing efficiency and the dehydration rate are improved. In the process of slurry pressing, the slurry can be slowly pressurized to avoid excessive slurry pressing pressure due to the small width of the pressing channel 131, which affects the normal operation of the pressing roller 31. By setting the slurry feeding component 2 to form a slurry feeding channel 121 with the slurry feeding cavity 12, the slurry feeding pressure is increased, and the slurry feeding smoothness is ensured. Even if the pressing channel 131 is gradually reduced, the slurry can be smoothly fed.

[0030] In some embodiments, a discharge screw is provided in the discharge cavity 11 and can rotate relative to the discharge cavity 11. The discharge screw is provided to form a discharge channel 111 with the inner wall of the discharge cavity 11, thereby further squeezing the slurry and providing sufficient driving force for the discharge of the slurry, preventing slurry accumulation, and ensuring the extrusion efficiency and extrusion effect. Preferably, the slurry feeding component 2 is a screw conveying device.

[0031] In some embodiments, the width K of the pulp feed channel 121 is 10 mm to 20 mm, the maximum width W of the pressing channel 131131 is 80 mm, 81 mm or 82 mm, the minimum width L of the pressing channel 131 is 25 mm or 26 mm, and the pulp feed channel 121 is connected to the pressing channel 131 through a transition channel 14. The width of the transition channel 14 is 70 mm, and the feeding direction of the transition channel 14 is in the vertical direction, so that the pulp is buffered in the process of flowing from the pulp feed channel 121 to the pressing channel 131.

[0032] In some embodiments, in the vertical direction, the starting end of the pressing channel 131 is located above the pressing component 3, and the length of the pressing channel 131 is 0.6 to 0.75 of the circumference of the pressing roller 31. Specifically, the length of the pressing channel 131 refers to the length of one side of the pressing channel 131 that is in contact with the circumferential side wall of the pressing roller 31. Optionally, the length of the pressing channel 131 is 0.6, 0.65 or 0.7 of the circumference of the pressing roller 31. Preferably, the length of the pressing channel 131 is 0.7 of the circumference of the pressing roller 31. The length of the pressing channel 131 is set so that the pressing distance of the pulp in the pressing channel 131 is extended, ensuring that the pulp is fully squeezed, thereby ensuring the dehydration rate and the squeezing effect. At the same time, in conjunction with the pulp feeding component 2, the problem of excessive pulp feeding resistance caused by the extension of the pressing channel 131 is overcome.

[0033] In some embodiments, the housing 1 is provided with a slurry inlet 15 and a slurry outlet 16, and an angle of 130° to 140° is formed between the axis of the slurry inlet 15 and the feeding direction of the transition channel 14. Preferably, the angle is 135°, at which the slurry can obtain an optimal feeding pressure.

[0034] In some embodiments, an extrusion channel 17 is formed between the two pressing rollers 31, and the discharge ends of the two pressing channels 131 are connected to the extrusion channel 17. Since the rollers 2 may swing during operation due to unstable slurry flow, the minimum spacing between the two rollers 2 will change, and the minimum width of the extrusion channel 17 is set to 5mm to 10mm. The minimum spacing between the two pressing rollers 31 is also located in the extrusion channel 17. In addition, the extrusion channel 17 is distributed in the vertical direction, so that after the slurry is discharged from the pressing channel 131, it enters the extrusion channel 17 for the last squeezing, and the water can be quickly separated from the slurry, thereby improving the dehydration rate.

[0035] In some embodiments, the pressing assembly 3 further comprises two driving members, which are in transmission connection with the pressing roller 31. Preferably, the driving member is a motor.

[0036] In some embodiments, the inner wall of the pressing chamber 13 is provided with a first washing port 132 and a second washing port 133 in sequence in the rotation direction of the roller, and the first washing port 132 and the second washing port 133 are both arranged opposite to the roller, and the first washing port 132 and the second washing port 133 are respectively connected to corresponding water sources, and are used to wash the surface of the roller, so that the black liquid water in the slurry is replaced, and the cleaning rate of the slurry is improved. The replaced black liquid water needs to be discharged from the pressing channel 131, so a drainage channel 311 distributed along the axial direction of the pressing roller 31 is opened in the pressing roller 31, and the drainage channel 311 is connected to the pressing channel 131, so that the black liquid water is discharged from the drainage channel 311, and the water squeezed out during the slurry pressing process is also discharged from the drainage channel 311.

[0037] The working principle of the utility model is:

[0038] The slurry is poured into the slurry inlet 15, and the slurry is squeezed through the slurry inlet channel 121, the squeezing channel 131 and the squeezing channel 17 in sequence and then enters the discharge cavity 11, and is discharged from the slurry outlet 16 under the squeezing of the discharge screw;

[0039] During the squeezing process of the slurry in the squeezing channel 131, the clean water flowing out of the first washing port 132 and the second washing port 133 continuously rinses the slurry, so that the black liquid water in the slurry is discharged from the drainage channel 311, thereby improving the cleaning rate of the slurry. After being rinsed, the slurry enters the terminal extrusion channel 17 for further squeezing to complete the squeezing.

[0040] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A squeezing structure of a pulp washer, characterized in that: It includes a casing, a pulp feeding component and a pressing component; The casing is provided with two pulp inlet cavities and two pressing cavities; A slurry inlet assembly is disposed in each slurry inlet cavity; The slurry inlet assembly is rotatably disposed in the slurry inlet cavity and forms a slurry inlet passage between the inner wall of the slurry inlet cavity; The pressing assembly includes two pressing rollers, which are rotatably disposed in the corresponding pulp inlet cavity and form a pressing channel with the inner wall of the pulp inlet cavity; The pulp inlet channel is communicated with the pressing channel, and the width of the pressing roller gradually decreases along the rotation direction of the pressing assembly.

2. A pressing structure of a pulp washer according to claim 1, characterized in that: The pulp inlet channel is connected to the pressing channel via a transition channel.

3. The squeezing structure of a pulp washer according to claim 1, characterized in that: In the vertical direction, the starting end of the pressing channel is located above the pressing assembly, and the length of the pressing channel is 0.6-0.75 of the circumference of the pressing roller.

4. The squeezing structure of a pulp washer according to claim 1, characterized in that: The width of the slurry inlet channel is 10 mm to 20 mm.

5. The squeezing structure of a pulp washer according to claim 2, characterized in that: The casing is provided with a slurry inlet, and the axis of the slurry inlet forms an angle of 130° to 140° with the feeding direction of the transition flow channel.

6. The squeezing structure of a pulp washer according to claim 1, characterized in that: An extrusion channel is formed between the two pressing rollers, and the discharge ends of the two pressing channels are communicated with the extrusion channel.

7. The squeezing structure of a pulp washer according to claim 1, characterized in that: The pressing assembly also includes two driving members; The driving member is drivingly connected to the pressure roller.

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