A sprue-like tooth pattern disintegrating machine

Abstract

A dewatering plate for a dewatering machine may include a base and a plurality of teeth extending from the base, wherein a specified number of the plurality of teeth have serrated surfaces.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 284,807, filed December 1, 2021, the contents of which are incorporated herein by reference in their entirety. Background Technology

[0003] Unless otherwise indicated herein, the materials described in this section are not prior art to the claims of this application and are not admitted as prior art by virtue of their inclusion in this section.

[0004] Deflappers are used in the paper recycling process and to separate waste paper, dry pulp flakes, and pulp bales. The recycling process typically begins with a pulper, which breaks down the raw material into smaller particles (e.g., flakes) and a certain amount of individual fibers. Using a pulper as a first step ensures that particle size does not cause clogging of subsequent equipment (such as deflappers), but they are less efficient in terms of energy consumption. Deflappers are typically used after the pulping process. Deflappers remove the raw material from the pulper and reduce the flake content from a range between 30% and 90% to below 5%, ideally below 1%. Depending on the paper grade, multiple deflappers may need to be used in series to achieve the desired flake reduction efficiency. Batches containing flakes (e.g., pulp) are unsuitable for papermaking because they result in poor forming and mottled paper.

[0005] The delamination plate uses rows of interlocking teeth, which can be arranged as concentric rings in a disc delamination machine or as a combination of the rotor and stator stepped cones in a conical delamination machine, providing a similar dynamic effect to the sheet. The interlocking edges and surfaces of the teeth are linear, straight, and relatively smooth. The operating clearance between the interlocking surfaces is typically about 1 mm. This configuration results in some mechanical energy being transferred to the sheet and causing it to separate, but some energy is also applied to individual fibers, which absorb this extra energy, leading to fiber transformation, which is generally undesirable during the delamination operation.

[0006] Figure 1 This diagram illustrates the conventional rotor and stator plate structure of a disc-type dewatering machine. (Reference) Figure 1 The stator 110 is a stationary element, while the rotor 120 is driven by the rotor shaft 130 of the unloading machine 100 and rotates relative to the stator 110. A stator plate 115 may be coupled to the stator 110. In some embodiments, the stator plate 115 may be a single-piece disk. In some embodiments, the stator plate 115 may be formed from a series of individually machined concentric rings 116a-116c. Although in Figure 1Three concentric rings are shown, but the stator plate may include more or fewer concentric rings without departing from the scope of this disclosure. In some embodiments, stator plate 115 may include a set of stator plate segments assembled on stator 110 to form a disk. Stator teeth 151 may be formed as concentric circles around the circular stator disk, for example, by milling or other machining operations.

[0007] Rotor plate 125 can be coupled to rotor 120. In some embodiments, rotor plate 125 may be a single-piece disk. In some embodiments, rotor plate 125 may be formed from a series of individually machined concentric rings 126a-126c. Although in Figure 1 Three concentric rings are shown, but the rotor plate may include more or fewer concentric rings without departing from the scope of this disclosure. In some embodiments, rotor plate 125 may include a set of rotor plate segments assembled on rotor 120 to form a disk. Rotor teeth 152 may be formed as concentric circles around the circular rotor disk, for example by milling or other machining operations. Stator teeth 151 on stator plate 115 and rotor teeth 152 on rotor plate 125 may form concentric rings of meshing teeth 150 to provide a dispersing effect. Gap 155 may be formed between the meshing teeth 150 through which pulp can flow for dispersing.

[0008] Figure 2 This diagram illustrates the conventional rotor cone and stator cone structure of a conical dewatering machine. (Reference) Figure 2 The tapered stator 210 is a stationary element, while the tapered rotor 220 is driven by the rotor shaft (not shown) of the tapered dewatering machine 200 and rotates relative to the tapered stator 210 about the axis of rotation 205 of the rotor shaft. A stepped stator cone 215 may be coupled to the tapered stator 210. In some embodiments, the stator cone 215 may be a single-piece cone. The single-piece stator cone 215 may be, for example, but not limited to, a single casting, a computer numerical control (CNC) machined cone, a welded assembly, etc. In some embodiments, the stator cone 215 may include a set of stator plate segments assembled on the tapered stator 210 to form a cone.

[0009] A stepped rotor cone 225 may be coupled to a conical rotor 220. In some embodiments, the rotor cone 225 may be a single-piece cone. The single-piece rotor cone 225 may be, for example, but not limited to, a single casting, a computer numerical control (CNC) machined cone, a welded assembly, etc. In some embodiments, the rotor cone 225 may include a set of rotor plate segments assembled on the conical rotor 220 to form a cone. The stator cone 215 and the rotor cone 225 may have meshing teeth 250 to provide a dispersing effect. A gap 255 may be formed between the meshing teeth 250 through which pulp can flow for dispersing. Summary of the Invention

[0010] Rotor and stator dewatering plates with a novel dewatering tooth pattern suitable for both disc dewatering machines and conical dewatering machines are provided.

[0011] According to various aspects, a dewatering machine plate for a dewatering machine is provided. In some aspects, the dewatering machine plate may include a base and a plurality of teeth extending from the base, wherein a specified number of the plurality of teeth have serrated surfaces.

[0012] Depending on various aspects, a dewatering machine plate for a dewatering machine is provided. In some aspects, the dewatering machine plate may include: a first dewatering machine plate and a second dewatering machine plate. The first dewatering machine plate may include a first base and a first plurality of teeth extending from the first base. A first specified number of teeth in the first plurality of teeth may have a serrated surface. The second dewatering machine plate may include a second base and a second plurality of teeth extending from the second base. A second specified number of teeth in the second plurality of teeth may have a serrated surface. The first plurality of teeth may be configured to mesh with the second plurality of teeth.

[0013] Compared to conventional techniques, numerous benefits are achieved through various embodiments. For example, various embodiments provide a de-fiber plate with a de-fiber tooth pattern for a de-fiber mill, which can reduce the amount of energy (e.g., milling energy) directed into the fiber finishing process while maintaining or improving de-fiber efficiency. In some embodiments, a specified number of teeth among the plurality of teeth of the de-fiber plate have serrated surfaces. These and other embodiments, along with their many advantages and features, are described in more detail below and in conjunction with the accompanying drawings. Attached Figure Description

[0014] The various aspects and features of the different implementation schemes will become more apparent by referring to the accompanying drawings, which illustrate examples:

[0015] Figure 1 This is a diagram showing the conventional rotor plate and stator plate structure of a disc-type dewatering machine;

[0016] Figure 2 This is a diagram showing the conventional rotor cone and stator cone structure of a conical decontamination machine;

[0017] Figure 3A This is a perspective view illustrating an example of a serrated tooth with linear serrations for a scraping machine plate according to some aspects of this disclosure;

[0018] Figure 3B This is a perspective view showing an example of a sawtooth-shaped tooth with threaded serrations for a scraping machine plate according to some aspects of this disclosure;

[0019] Figure 4A This is a diagram illustrating an example of serrations on the surface of serrated teeth for stator plates and rotor plates according to some aspects of this disclosure;

[0020] Figures 4B to 4H Examples of sawtooth pattern profiles that may be used in various embodiments according to some aspects of this disclosure are shown;

[0021] Figure 5A This is a diagram illustrating an example of a disc-type scavenging plate with serrated teeth according to some aspects of this disclosure;

[0022] Figure 5B This is a diagram illustrating an example of a disc-type dewatering plate with only one dewatering plate having serrated teeth according to some aspects of this disclosure;

[0023] Figure 6A This is a diagram illustrating an example of a scavenging cone with serrated teeth according to some aspects of this disclosure; and

[0024] Figure 6B This is a diagram illustrating an example of a scavenging cone having serrated teeth, with only one scavenging cone according to some aspects of this disclosure. Detailed Implementation

[0025] While certain embodiments are described, these embodiments are presented by way of example only and are not intended to limit the scope of protection. The apparatuses, methods, and systems described herein may be embodied in various other forms. Furthermore, various omissions, substitutions, and changes may be made to the form of the exemplary methods and systems described herein without departing from the scope of protection.

[0026] Unless otherwise stated, similar reference numerals are used throughout several views to indicate corresponding parts. Although the drawings illustrate embodiments of various features and components according to this disclosure, the drawings are not necessarily drawn to scale and certain features may be exaggerated to better illustrate embodiments of this disclosure, and such examples should not be construed as limiting the scope of this disclosure.

[0027] Unless otherwise expressly stated herein, the following rules of interpretation apply to this specification: (a) all words used herein shall be interpreted as kind or number (singular or plural) as the context requires; (b) unless the context clearly indicates otherwise, the singular terms “a,” “an,” and “the” used in the specification and appended claims include plural references; (c) the antecedent term “about” applied to enumerated ranges or values ​​indicates an approximation of a range or value known or anticipated in the art within the deviation from the measured value; (d) unless otherwise stated, the words “this,” “here,” “in this,” “foreword,” and “below,” and words with similar meanings refer to the entirety of this specification and not to any particular paragraph, claim, or other subsection; (e) descriptive headings are for convenience only and shall not control or affect the meaning or structure of any part of the specification; and (f) “or” and “any” are not exclusive, and “comprising” and “including” are not restrictive. Furthermore, the terms “comprising,” “having,” “including,” and “containing” shall be interpreted as open-ended terms (i.e., meaning “including but not limited to”).

[0028] Unless otherwise indicated herein, the enumeration of value ranges herein is intended merely as a shorthand method for individually referring to each individual value within any subrange of the range. Each individual value within the enumerated ranges is incorporated into the specification or claims as if each individual value were enumerated separately herein. Where a particular value range is provided, it should be understood that, unless the context explicitly specifies otherwise, this document includes every intermediate value (up to one-tenth or less of the lower limit unit) between the upper and lower limits of the range, as well as any other stated value or intermediate value within the range or its subranges. All subranges are also included. This document also includes the upper and lower limits of these smaller ranges, which belong to any specifically and explicitly excluded limits within the range.

[0029] The defroster can be a disc or conical machine, characterized by rows of intermeshing teeth operating at high speed to generate maximum shear force to separate sheets of recycled pulp. The defroster plates utilize rows of intermeshing teeth, which can be formed as concentric rings in a disc defroster or a combination of stepped or truncated stepped cones in a conical defroster, providing a similar dynamic effect on the sheets. The defroster operates typically at a consistency between 2% and 6%, and the typical gap between the intersecting rows of teeth on the stator and rotor plates or cones is approximately 1 mm (0.5–2.0 mm). To achieve the best possible sheet separation efficiency while minimizing the amount of energy imparted to individual fibers (e.g., polishing energy), the gap between the defroster plates of the rotor and stator can be adjusted. However, if the gap is increased, the amount of polishing energy may decrease, but the defrosting effect will also be reduced. The reduced effectiveness of the drainage process may require more drainage stages, which will consume more total energy because the pumping in each drainage machine will cause significant losses.

[0030] According to various aspects of this disclosure, novel de-fiber tooth patterns suitable for both disc de-fiber machines and conical de-fiber machines are provided. The de-fiber tooth patterns according to this disclosure can reduce the amount of energy (e.g., grinding energy) directed into fiber finishing while maintaining or improving de-fiber efficiency. Additionally, hydraulic friction losses can be reduced, thereby requiring less energy to reduce performance (e.g., de-fiber efficiency) for a given sheet.

[0031] Various aspects of this disclosure provide serrated surfaces on the teeth of a de-splitter plate or de-splitter cone. As used herein, the term "cone" refers to both a cone and a truncated cone. The peaks and valleys of the serrated teeth can be formed at acute angles. The serrated tooth surface can produce different gap conditions and mechanical de-splitting actions. The serrated tooth surface can capture pulp sheets using the edges of the peaks and teeth on the surface to shear the sheets. Individual pulp fibers are less likely to be captured by the peaks and less likely to be processed in a shearing action that intersects with opposing peaks.

[0032] Figure 3A This is a perspective view illustrating an example of a serrated tooth 310 with linear serrations for a stripping plate according to some aspects of this disclosure. The stripping plate may be a stator plate or a rotor plate, or it may be a stator segment or a rotor segment. Figure 3A As shown, the serrated teeth 310 have peaks and valleys 315 extending linearly on the tooth surface at a specified linear pitch. In some embodiments, only a portion of the tooth surface may include serrations. When installed in a decanter, the serrated tooth surfaces of the rotor plate or stator plate may be respectively configured to face the tooth surfaces on the opposite stator plate or rotor plate.

[0033] Figure 3BThis is a perspective view illustrating an example of a serrated tooth 320 with threaded serrations for a scraping machine plate according to some aspects of this disclosure. (See image) Figure 3B As shown, the serrated teeth 320 have peaks and valleys 325 extending on the tooth surface with a specified thread pitch. In some embodiments, only a portion of the tooth surface may include serrations. When installed in a dewatering machine, the serrated tooth surfaces of the rotor plate or stator plate may be respectively configured to face the tooth surfaces on the opposite stator plate or rotor plate.

[0034] Figure 4A This is a diagram illustrating an example of serrations on the surface of serrated teeth for stator plate 410 and rotor plate 450 according to some aspects of this disclosure. The peaks 453 and valleys 455 of the serrated teeth may be formed as acute angles. In some embodiments, a surface hardening treatment may be provided on the scrambling surface of the teeth. Surface hardening treatment may be beneficial in maintaining sharp peaks throughout the life of the scrambling plate. In some cases, the surface hardening treatment may be applied to the teeth of stator plate 410 and / or rotor plate 450. In some cases, the surface hardening treatment may be applied to the entire stator plate 410 and / or the entire rotor plate 450.

[0035] Peaks and valleys can form serrated patterns with different structures, such as, but not limited to, linear, curved, circular, angled, and intersecting serrated patterns. Figures 4B to 4H Examples of serrated pattern profiles that can be used in various embodiments according to some aspects of this disclosure are shown. For example... Figures 4B to 4H As shown, the teeth of the sawtooth profile may have sharp points (e.g., Figure 4B , Figure 4C , Figure 4F ), flat top (e.g., Figure 4D , Figure 4E , Figure 4G ), dome (e.g., Figure 4H (or combinations thereof.) It should be understood that, Figures 4B to 4H The serrated pattern shown is a non-limiting example, and other serrated patterns may be used without departing from the scope of this disclosure.

[0036] In some embodiments, the serrations may be formed at an angle relative to the substrate on the surface of the slitting machine teeth. In some embodiments, the pattern of peaks and valleys may resemble a thread forming around the teeth, thereby providing a substantially uniform distribution of peaks and valleys at all locations along the tooth surface. In some embodiments, only a portion of the tooth surface may include serrations.

[0037] Refer again Figure 4AThe serrated surface may include peaks 453 and valleys 455 having a specified pitch (e.g., the distance between peaks) (e.g., a pitch in the range of 0.5-3.0 mm) 460. The average gap 470 affecting the pulp fibers may be formed by the operating gap 465 plus half the combined depth of the valleys of the serrated teeth 475a, 475b.

[0038] Figure 5A This is a diagram illustrating an example of a disc-type scavenging plate having serrated teeth 515, 525 according to some aspects of this disclosure. Reference Figure 5A The stator plate 510 may include a base 512 and serrated teeth 515 extending from the base 512. In some embodiments, the base may be a disk, disk segment, or ring. The rotor plate 520 may include a base 522 and serrated teeth 525 extending from the base 522. The serrated teeth 515 of the stator plate 510 may mesh with the serrated teeth 525 of the rotor plate 520. In some embodiments, only a portion of the tooth surface of the rotor plate and / or stator plate may include serrations. An operating gap 530 may be provided between the peaks of the serrated teeth 515 of the stator plate 510 and the peaks of the serrated teeth 525 of the rotor plate 520. See also the operating gap 465 in FIG4.

[0039] Figure 5B This is a diagram illustrating an example of a disc-type dewatering machine plate with only one dewatering plate having serrated teeth, according to some aspects of this disclosure. (See diagram for example.) Figure 5B As shown, stator plate 550 may include a base 552 and teeth 555 extending from the base 552. Rotor plate 560 may include a base 562 and serrated teeth 565 extending from the base 562. The teeth 555 of stator plate 550 may not have serrations, while the teeth 565 of rotor plate 560 may have serrations. An operating clearance 570 may be provided between the face of the non-serrated teeth 555 of stator plate 510 and the peak of the serrated teeth 565 of rotor plate 510.

[0040] In some embodiments, both the rotor plate and the stator plate may have serrated teeth. In some embodiments, only the rotor plate or the stator plate may have serrated teeth. In some embodiments, each tooth on the rotor plate and / or stator plate may have serrations. In some embodiments, only a portion of the teeth on the rotor plate and / or stator plate may have serrations. In some embodiments, only a portion of the tooth surface on the rotor plate and / or stator plate may include serrations.

[0041] According to some aspects of this disclosure, serrated teeth can be provided for the stator and rotor cones of the conical dewatering machine. The stator and rotor cones can be formed from conical plate segments, or they can be a single cone. The stator and rotor cones can be stepped cones. In some embodiments, the stepped cone can be an angled stepped cone. Similar to the description of... Figure 3A , Figure 3BAs shown in Figure 4, the sawtooth teeth of the dewatering plate may have peaks and valleys extending linearly on the tooth surface at a specified linear pitch. When installed in a dewatering machine, the sawtooth tooth surfaces of the rotor plate or stator plate may be respectively configured to face the tooth surfaces on the opposite stator plate or rotor plate.

[0042] In some embodiments, a surface hardening treatment may be provided on the spalling surface of the teeth. Surface hardening treatment can help maintain sharp peaks throughout the life of the spalling plate. Peaks and valleys can form serration patterns with different configurations, such as, but not limited to, linear, curved, circular, angled, crosshair, etc. In some embodiments, the serrations may be formed at an angle relative to the substrate on the surface of the spalling teeth. In some embodiments, the peak and valley pattern may resemble a thread forming around the teeth, thereby providing a substantially uniform distribution of peaks and valleys at all locations along the tooth surface.

[0043] Figure 6A This is a diagram illustrating an example of a scavenging cone with serrated teeth according to some aspects of this disclosure. Reference Figure 6A The stator cone 610 may include a stepped conical base 612 and serrated teeth 615 extending from the stepped conical base 612. The rotor cone 620 may include a stepped conical base 622 and serrated teeth 625 extending from the stepped conical base 622. In some embodiments, the base of the rotor cone and / or stator cone may be a cone, a segmented cone, or a stepped conical segment. In some embodiments, only a portion of the tooth surfaces on the rotor cone and / or stator cone may include serrations. The serrated teeth 615 of the stepped stator cone 610 may mesh with the serrated teeth 625 of the stepped rotor cone 620. An operating clearance 630 may be provided between the peaks of the serrated teeth 615, 625 of the stator cone 610 and the rotor cone 620.

[0044] Figure 6B This is a diagram illustrating an example of a scavenging cone having serrated teeth, with only one scavenging cone according to some aspects of this disclosure. Figure 6B As shown, the stator cone 650 may include a stepped cone base 652 and teeth 655 extending from the stepped cone base 652. The teeth 655 of the stator cone 650 may not have serrations. The rotor cone 660 may include a stepped cone base 662 and serrated teeth 665 extending from the stepped cone base 662. In some embodiments, only a portion of the tooth surface may include serrations. The serrated teeth 655 of the stepped stator cone 650 may mesh with the non-serrated teeth 665 of the stepped rotor cone 660. An operating clearance 670 may be provided between the surface of the non-serrated teeth 655 of the rotor cone 660 and the peak of the serrated teeth 665 of the stator cone 650.

[0045] In some embodiments, both the rotor cone and the stator cone may have serrated teeth. In some embodiments, only the rotor cone or the stator cone may have serrated teeth. In some embodiments, each tooth on the rotor cone and / or stator cone may have serrations. In some embodiments, only a portion of the teeth on the rotor cone and / or stator cone may have serrations. In some embodiments, only a portion of the tooth surface on the rotor cone and / or stator cone may include serrations.

[0046] The serrated tooth surface and edge characteristics of the stator and rotor plates, as well as the stator and rotor cones, according to this disclosure improve the flaking efficiency. Large-sized flakes will be easily captured by the multiple peaks of the serrated surface; however, this reduces the energy required for fiber grinding and the hydraulic shear losses between the passing teeth. The operating clearance between the meshing teeth can be reduced, thereby improving the flake removal efficiency in a single pass without increasing energy losses due to fiber grinding and hydraulic shear losses.

[0047] The examples and embodiments described herein are for illustrative purposes only. Those skilled in the art will understand that these constructions and other variations thereof may be used without departing from the scope of this disclosure.

Claims

1. A dewatering machine plate for a dewatering machine, the dewatering machine plate comprising: Including the substrate of the surface; as well as Multiple teeth extending from the surface of the substrate, Each of the specified number of teeth in the plurality of teeth includes a serrated surface. The serrations on the serrated surface have peaks and valleys. Each of the peaks and valleys points along the rotation direction of the scavenging plate on the serrated surface, and Each of the peaks and valleys is oriented either parallel to the surface of the substrate or defines an acute angle relative to the surface of the substrate.

2. The sprue plate as claimed in claim 1, wherein the saw teeth comprise a saw tooth pattern having a specified thread pitch or a specified linear pitch.

3. The scraping plate of claim 1, wherein less than the entire portion of the serrated surface comprises serrations.

4. The scraping plate of claim 1, wherein the specified number of teeth having the serrated surface includes all of the plurality of teeth.

5. The scraping plate of claim 1, wherein the specified number of teeth having the serrated surface includes fewer than all of the plurality of teeth.

6. The scavenging plate as claimed in claim 1, wherein the substrate is a disc, ring, or disc segment.

7. The shunting plate as claimed in claim 1, wherein the base is a cone, a segmented cone, a stepped cone, or a stepped cone segment.

8. The scavenging plate as claimed in claim 1, further comprising a surface hardening treatment applied to the plurality of teeth.

9. A dewatering machine plate for a dewatering machine, the dewatering machine plate comprising: The first evacuation plate includes: Including the first substrate of the surface; and The first plurality of teeth extending from the surface of the first substrate, Each of the first specified number of teeth in the first plurality of teeth includes a serrated surface. The serrations on the serrated surface have peaks and valleys. Each of the peaks and valleys points along the rotation direction of the first scavenging plate on the serrated surface, and Each of the peaks and valleys is oriented parallel to the surface of the first substrate, or defines an acute angle relative to the surface of the first substrate; and The second evacuation plate includes: Including the second substrate of the surface; and The second plurality of teeth extending from the surface of the second substrate, Each of the second specified number of teeth in the second plurality of teeth includes a serrated surface. The serrations on the serrated surface have peaks and valleys. Each of the peaks and valleys points along the serrated surface in the direction of rotation of the first scavenging plate. Each of the peaks and valleys is oriented parallel to the surface of the second substrate, or defines an acute angle relative to the surface of the second substrate. The first plurality of teeth are configured to mesh with the second plurality of teeth.

10. The slitting plate of claim 9, wherein the saw teeth of the first specified number of teeth and the second specified number of teeth comprise a saw tooth pattern having a specified thread pitch or a specified linear pitch.

11. The scraping plate of claim 9, wherein the entire portion of the serrated surface of fewer than the first specified number of teeth or the second specified number of teeth comprises serrations.

12. The scraping plate of claim 9, wherein the first specified number of teeth and the second specified number of teeth having the serrated surface include all of the first plurality of teeth and the second plurality of teeth.

13. The scraping plate of claim 9, wherein the first specified number of teeth and the second specified number of teeth having the serrated surface include fewer than all of the first plurality of teeth and the second plurality of teeth.

14. The scraping plate of claim 9, wherein the first specified number of teeth having the serrated surface includes all of the first plurality of teeth, and The second specified number of teeth having the serrated surface includes all teeth less than the second plurality of teeth.

15. The scraping plate of claim 9, wherein the first specified number of teeth having the serrated surface includes fewer than all of the first plurality of teeth, and The second specified number of teeth having the serrated surface includes all the teeth in the second plurality of teeth.

16. The scavenging plate of claim 9, wherein the first substrate and the second substrate are discs, rings or disc segments.

17. The shunting plate as claimed in claim 9, wherein the first base and the second base are cones, segmented cones, stepped cones, or stepped cone segments.

18. The scavenging plate of claim 9, further comprising a surface hardening treatment applied to the first plurality of teeth or the second plurality of teeth or both the first plurality of teeth and the second plurality of teeth.

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