Defibering device of screening machine
By designing a screening machine degassing device including a degassing knife and a screen plate in papermaking and pulping equipment, the problem of difficulty in removing wet paper sheets in the slurry is solved, the screening efficiency and production efficiency are improved, and a vicious cycle is avoided.
Patent Information
- Application Number
- CN202420997365.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-09
AI Technical Summary
In existing paper-making and pulping equipment, wet paper sheets in the slurry are difficult to remove, resulting in blocking the screen drum during screening, wearing the rotor rotor, affecting the slurry efficiency, and forming a vicious cycle.
Design a screening machine degassing device, including a shell, a screen drum, a transmission shaft, a rotor body, a rotor and a degassing knife. The loosening knife consists of an annular array of blades. The end of the blade extends to the screen drum position. The blade faces the direction of slurry flow. The included angle is 75 degrees. The extended shape of the blade is arc-shaped. There is a screen plate downstream of the desludging knife to prevent impurities and wet paper from entering the screening area.
Through the agitation and loosening effect of the loosening knife, the slurry is promoted to enter the screening area, improving screening efficiency, preventing wet paper from clogging the screen drum, reducing waste, avoiding a vicious cycle, and improving slurry production efficiency.
Smart Images
Figure CN222375084U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of papermaking and pulping equipment, in particular to a screening machine deflaking device. Background Art
[0002] At present, in order to meet the requirements of their own processing technology, industries such as pulping and papermaking, wood-based panel manufacturing, etc. usually need to use screening machinery to process the purchased waste paper, wood chips, bamboo chips and other raw materials into pulp, and then screen them, and then use suitable pulp for production. Separator is one of the most commonly used screening equipment in the pulping and papermaking industry. Now most of the pulping in paper mills is completed through coarse screening and fine screening procedures to screen materials. However, the existing pulp contains many impurities, which often clog the screen drum during screening, wear the rotor, and affect the pulping efficiency. Therefore, it is necessary to stand for a long time to precipitate the heavy impurities and screen out the light impurities before pumping them into the separator for screening. This leads to a long pulp processing cycle, which seriously affects the production efficiency of the pulp. In addition, the wet paper pieces in the pulp are always suspended and will enter the screening area of the separator with the pulp. The separator is also difficult to separate such wet paper pieces, which are discharged with the slag, forming a vicious cycle.
[0003] Therefore, in the technical field of papermaking and pulping equipment, there is still a need for research and improvement on the screening machine deflaking device, which is also a research hotspot and focus in the current technical field of papermaking and pulping equipment, and is also the starting point for the completion of the present utility model. Utility Model Content
[0004] Therefore, the technical problem to be solved by the utility model is: to provide a screening machine deflaking device to solve the technical problem that wet paper sheets in the pulp are difficult to remove.
[0005] In order to solve the above technical problems, the technical solution of the utility model is: a screening machine debonding device, comprising a shell body arranged axially horizontally, a screen drum is fixedly installed in the shell, a transmission shaft driven by a power device is rotatably installed in the shell, the transmission shaft is coaxially arranged with the shell, a columnar rotor body is provided on the transmission shaft, at least one group of rotors is provided on the outer peripheral surface of the rotor body, the rotor includes a plurality of wing seats protruding from the rotor body, two adjacent wing seats are staggered in the axial direction of the rotor body, a debonding knife is fixedly installed on the transmission shaft, the debonding knife includes a plurality of blades in an annular array, the ends of the blades extend to the screen drum position, and the blades of the debonding knife face the flow direction of the slurry.
[0006] As an improvement, the angle between the blade edge and the blade face of the blade is 75 degrees.
[0007] As a further improvement, the extended shape of the blade is an arc shape.
[0008] As a further improvement, a screen plate is provided downstream of the deflaking knife.
[0009] After adopting the above technical solution, the beneficial effects of the utility model are:
[0010] In the embodiment of the utility model, a deflashing knife is fixedly installed on the transmission shaft. On the one hand, the slurry is agitated as the transmission shaft rotates, so that the flow rate of the incoming slurry is accelerated, the slurry is promoted to enter the screening area and the slag is discharged, and the screening efficiency is improved. On the other hand, the deflashing knife can also deflake wet-strength paper sheets with a larger area into fibers, so that the wet-strength fibers entering the screening area are not easy to clog the screen drum, but are discharged with the slurry, thereby avoiding the wet-strength paper sheets from being discharged with the slag, reducing the waste of wet-strength paper sheets, and avoiding the vicious cycle caused by repeated screening of wet-strength paper sheets.
[0011] Since a screen plate is provided downstream of the deflaking knife, when the downstream of the deflaking knife is a screening area, impurities with larger particle sizes and wet-strength paper sheets with large areas can be blocked from entering the screening area, reducing the number of impurities clogging the screen drum, thereby improving the pulp production efficiency; when the downstream of the deflaking knife is a slag discharge area, the wet-strength paper sheets that have not been deflaked are intercepted by the screen plate and continue to be deflaked by the deflaking knife. After being deflaked into wet-strength fibers, they pass through the screen plate to form good pulp, reducing the waste of wet-strength paper sheets and avoiding the vicious cycle caused by repeated screening of wet-strength paper sheets. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.
[0013] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0014] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;
[0015] Figure 2 It is a structural schematic diagram of the debonding knife in the embodiment of the utility model;
[0016] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA;
[0017] In the figure: 1, shell, 2, screen drum, 3, transmission shaft, 4, rotor body, 5, wing seat, 6, debonding knife, 601, blade, 602, blade edge, 603, knife surface, 7, screen plate. DETAILED DESCRIPTION
[0018] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] The terms such as "front", "back", "left", "right", "inside", "outside", "middle", etc. cited in this specification are only for the convenience of description and are not intended to limit the scope of application of the present invention. Changes or adjustments to their relative relationships shall be regarded as within the scope of application of the present invention without substantially changing the technical content.
[0020] like Figure 1 As shown, the utility model provides a screening machine debonding device, including a shell body 1 axially arranged horizontally, a screen drum 2 is fixedly installed in the shell body 1, the screen drum 2 can choose to use a hole screen or a slot screen to achieve coarse screening or fine screening of different slurries, and those skilled in the art can choose to use it according to their needs. A transmission shaft 3 driven by a power device is rotatably installed in the shell body 1, and the transmission shaft 3 is coaxially arranged with the shell body 1. The power device is usually a belt transmission device driven by a motor. The device is a common technology in this field and is not described here. A columnar rotor body 4 is provided on the transmission shaft 3, and at least one group of rotors is provided on the outer peripheral surface of the rotor body 4. The rotor includes a plurality of wing seats 5 protruding from the rotor body 4, and two adjacent wing seats 5 are staggered in the axial direction of the rotor body 4, so as to avoid long residence time of impurities and unsmooth slag discharge, solve the problem that the impurities block the screen of the screen drum 2 and cause serious wear of the wing seat 5, and reduce the maintenance cost. A deflashing knife 6 is fixedly mounted on the transmission shaft 3. The deflashing knife 6 can play a deflashing role and deflashes a large number of wet-strength paper sheets into fine fibers, thereby preventing a large number of wet-strength paper sheets from entering the screening area and clogging the screen drum 2. Figure 2As shown, the deflaking knife 6 includes a plurality of blades 601 in a circular array, the ends of the blades 601 extend to the position of the screen drum 2, and the blade 602 of the deflaking knife 6 faces the flow direction of the pulp. When the deflaking knife 6 is arranged upstream of the screen drum 2, the pulp enters from the pulp inlet, and the wet-strength paper sheets in the pulp are firstly deflaked by the deflaking knife 6 and then enter the screening area. When the deflaking knife 6 is located downstream of the screen drum 2, the pulp discharged from the screening area, the wet-strength paper sheets contained therein are deflaked by the deflaking knife 6 into wet-strength fibers to form good pulp, and are not discharged with the slag.
[0021] like Figure 3 As shown, the angle between the blade 602 and the blade surface 603 of the blade 601 is 75 degrees, which is usually 75±5 degrees, which not only has an accelerated stirring effect, but also has good debonding performance, extending the service life of the blade 601. The extended shape of the blade 601 is an arc, which has a longer debonding surface compared to a straight line design, further improving the debonding effect.
[0022] A screen plate 7 is provided downstream of the deflaking knife 6. Similarly, the screen plate 7 can also be selected to use a hole screen or a slotted screen as needed. When the downstream of the deflaking knife 6 is a screening area, it can prevent impurities with larger particle sizes and wet-strength paper sheets with large areas from entering the screening area, reducing the number of impurities blocking the screen drum 2, thereby improving the pulp production efficiency; when the downstream of the deflaking knife 6 is a slag discharge area, the wet-strength paper sheets that have not been deflaked are intercepted by the screen plate 7 and continue to be deflaked by the deflaking knife 6. After being deflaked into wet-strength fibers, they pass through the screen plate 7 to form good pulp, reducing the waste of wet-strength paper sheets and avoiding the vicious cycle caused by repeated screening of wet-strength paper sheets.
[0023] The utility model can be arranged at the upstream position of the screening, or at the downstream position of the screening, or can be arranged at the upstream and downstream of the screening at the same time according to needs, thereby further improving the pulp quality and reducing the waste of wet-strength paper sheets.
[0024] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.
Claims
1. A screening machine debonding device, comprising a housing arranged axially horizontally, a screen drum fixedly installed in the housing, a transmission shaft driven by a power device rotatably installed in the housing, the transmission shaft and the housing arranged coaxially, a columnar rotor body arranged on the transmission shaft, at least one set of rotors arranged on the outer peripheral surface of the rotor body, the rotors comprising a plurality of wing seats protruding from the rotor body, two adjacent wing seats being arranged alternately in the axial direction of the rotor body, characterized in that: A deflaking knife is fixedly mounted on the transmission shaft, and the deflaking knife comprises a plurality of blades in a circular array, the ends of the blades extend to the screen drum position, and the blades of the deflaking knife face the flow direction of the slurry.
2. The screening machine deburring device according to claim 1, characterized in that: The angle between the blade edge and the blade face of the blade is 75 degrees.
3. The screening machine deburring device according to claim 2, characterized in that: The extended shape of the blade is an arc shape.
4. The screening machine deburring device according to claim 1, 2 or 3, characterized in that: A screen plate is provided downstream of the deflaking knife.