A tail stock processing device for reducing fiber loss and pulping OCC line
By designing a tail slurry treatment device including a fine screen tail slurry slurry tank, a slurry pump, a tail slurry screen and a transition slurry tank, the problems of large slurry slurry discharge and large fiber loss are solved, and the effect of reducing raw material unit consumption and reducing on-site pollution is achieved.
Patent Information
- Application Number
- CN202421510353.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing tail slurry treatment device directly discharges the tail slurry after the OCC line three-section fine screen, ONP line three-section fine screen and DIP line three-section fine screen, resulting in large slag discharge and large fiber loss, increasing raw material costs, and large slag discharge cannot be completely discharged through the trench, resulting in pollution on-site sanitation.
A tail slurry treatment device is designed to reduce fiber loss, including a fine screen tail slurry tank, a slurry pump, a tail slurry screen and a transition slurry tank. The tail slurry is pumped from the tail slurry slurry tank through the slurry pump to the tail slurry slurry for separation and treatment. The separated good slurry is sent to the slurry for re-crumbing, and the separated slurry is discharged to the transition slurry tank for subsequent treatment.
By adding tailing sieve, fiber loss in tailing slurry is reduced, raw material consumption is reduced, and production costs are reduced. At the same time, through the separation and treatment of tail slag sieves, the discharge of tail slurry is effectively reduced, the situation where the tail slurry is large and the drainage is endless, and the sanitary pollution on site is reduced.
Smart Images
Figure CN222700716U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of papermaking, and in particular to a tail stock processing device for reducing fiber loss and a pulping OCC line. Background Art
[0002] like Figure 1 In the tailings processing device shown, in the PM8 pulping mill, the tailings generated after the three-stage fine screening of the OCC line, the three-stage fine screening of the ONP line and the three-stage fine screening of the DIP line are discharged into the tailings slag tank, and then the slag in the tailings slag tank is discharged to the PM7 workshop for subsequent treatment; however, directly discharging the tailings in the tailings slag tank to the PM7 mill results in a large amount of tailings slag discharge and a large loss of fiber, resulting in an increase in raw material costs. At the same time, the large amount of slag discharge cannot be completely discharged through the ditch, resulting in pollution to on-site hygiene. Utility Model Content
[0003] In view of the above problems, the present application provides a tailings processing device and a pulping OCC line for reducing fiber loss, which are used to solve the problem that the tailings generated after the three-stage fine screening of the OCC line, the three-stage fine screening of the ONP line and the three-stage fine screening of the DIP line are discharged into the tailings slag tank and then directly discharged into the PM7 workshop for subsequent treatment, resulting in a large amount of tailings slag discharge and a large amount of fiber loss, which causes an increase in raw material costs. At the same time, the large amount of slag discharge cannot be completely discharged through the ditch, resulting in pollution of on-site hygiene.
[0004] To achieve the above object, the inventor provides a tail slurry processing device for reducing fiber loss, comprising:
[0005] A fine screening tailings slurry trough, wherein the fine screening tailings slurry trough is used to receive tailings after fine screening of the pulping OCC line, ONP line or DIP line;
[0006] A slurry feed pump, wherein the slurry inlet of the slurry feed pump is connected to the fine screen tailings slurry tank;
[0007] A tailings screen, wherein the slurry inlet of the tailings screen is connected to the slurry delivery port of the slurry feed pump, and the slurry outlet of the tailings screen is connected to the pulper of the OCC line;
[0008] A transition slag trough is connected to a slag discharge port of the tailings screen.
[0009] In some embodiments, it also includes:
[0010] A slurry discharge pump, wherein the slurry inlet of the slurry discharge pump is connected to the transition slag trough, and the slurry discharge pump is used to discharge the slurry in the transition slag trough to the PM7 workshop.
[0011] In some embodiments, the tailings screen is a pressure screen.
[0012] In some embodiments, the tailings screen comprises:
[0013] An outer tank, wherein a plurality of sedimentation ports are arranged at intervals at the bottom of the outer tank;
[0014] An inner tank, the inner tank is arranged in the outer tank, the inner tank is connected to a sedimentation port on the outer tank, and the sedimentation port is arranged to be inclined downward toward the inner tank;
[0015] A feed pipe, one end of which is connected to the slurry discharge port of the slurry feed pump, and the other end of which is connected to the outer tank;
[0016] A discharge pipe, one end of which is connected to the outer tank, and the other end of which is connected to the pulper of the OCC line;
[0017] A slurry discharge pipe, one end of which is connected to the inner tank, and the other end of which is connected to the transition slag tank;
[0018] A dispersion mechanism is provided on the outer tank and is used for dispersing and stirring the tail slurry in the outer tank.
[0019] In some embodiments, there are two dispersion mechanisms, which are symmetrically arranged in the outer groove.
[0020] In some embodiments, a maintenance port is provided on the inner tank.
[0021] In some embodiments, the upper opening of the precipitation port is rectangular in shape.
[0022] Another technical solution is provided, which is a pulping OCC line, comprising the tail stock processing device for reducing fiber loss as described above.
[0023] Different from the prior art, the above technical solution, in the PM8 pulping workshop, after the tailings produced after the three-stage fine screening of the OCC line, the three-stage fine screening of the ONP line and the three-stage fine screening of the DIP line are discharged into the fine screening tailings slag tank, the tailings in the fine screening tailings slag tank are pumped into the tailings slag screen for separation treatment by the pulp feed pump, and the good pulp obtained by the separation treatment is sent to the pulper of the OCC line for re-disintegration, recycled through the process, and then the slag slurry obtained after the separation treatment is discharged into the transition slag tank for subsequent tailings discharge; by adding a tailings slag screen after the fine screening tailings slag tank, the fiber loss in the tailings can be reduced, the unit consumption of raw materials can be reduced, and thus the production cost can be reduced. At the same time, after the separation treatment of the tailings slag screen, the discharge volume of the tailings is effectively reduced, and the situation where the tailings are too large to be drained in the trench is effectively reduced, and the situation of on-site sanitary pollution is reduced.
[0024] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation method and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.
[0026] In the drawings of the specification:
[0027] Figure 1 A structural schematic diagram of the tailings slurry treatment device described in the background technology;
[0028] Figure 2 A schematic diagram of the structure of a tailings slurry processing device for reducing fiber loss according to a specific implementation method;
[0029] Figure 3 It is another structural schematic diagram of the tailings processing device for reducing fiber loss according to the specific implementation method;
[0030] Figure 4 A schematic diagram of the structure of the tailings screen described in the specific implementation method;
[0031] Figure 5 Another structural schematic diagram of the tailings screen described in the specific implementation method;
[0032] Figure 6 Another structural schematic diagram of the tailings screen described in the specific implementation method
[0033] Figure 7 It is a structural schematic diagram of the pulping OCC line described in the specific implementation method.
[0034] The reference numerals in the above drawings are described as follows:
[0035] 110. Fine screening tailings slurry tank,
[0036] 120. Slurry inlet pump;
[0037] 130. Tailings Screen
[0038] 140. Transition slag trough;
[0039] 150. Slurry discharge pump;
[0040] 210, outer groove,
[0041] 211, sedimentation port;
[0042] 220, inner groove;
[0043] 221. Maintenance port;
[0044] 230, feed pipe;
[0045] 231, first flow guide pipe;
[0046] 240, discharge pipe;
[0047] 241, second flow guide pipe;
[0048] 250. Decentralized institutions;
[0049] 260. Slurry discharge pipe. DETAILED DESCRIPTION
[0050] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.
[0051] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.
[0052] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.
[0053] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.
[0054] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.
[0055] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.
[0056] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.
[0057] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.
[0058] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0059] See also Figure 2-3 This embodiment provides a tail slurry processing device for reducing fiber loss, comprising:
[0060] A fine screening tailings slurry trough 110, wherein the fine screening tailings slurry trough 110 is used to receive tailings after fine screening of a pulping OCC line, ONP line or DIP line;
[0061] A slurry feed pump 120, wherein the slurry inlet of the slurry feed pump 120 is connected to the fine screening tailings slurry tank 110;
[0062] A tailings screen 130, wherein the pulp inlet of the tailings screen 130 is connected to the pulp delivery port of the pulp feed pump 120, and the pulp outlet of the tailings screen 130 is connected to the pulper of the OCC line;
[0063] The transition slag chute 140 is connected to the slag discharge port of the tailing slag screen 130 .
[0064] In the PM8 pulping workshop, after the tailings produced after the three-stage fine screening of the OCC line, the three-stage fine screening of the ONP line, and the three-stage fine screening of the DIP line are discharged into the fine screening tailings slag tank 110, the tailings in the fine screening tailings slag tank 110 are pumped to the tailings slag screen 130 for separation treatment by the pulp inlet pump 120, and the good pulp obtained by the separation treatment is sent to the pulper of the OCC line for re-disintegration, recycled through the process, and then the slag obtained after the separation treatment is discharged into the transition slag tank 140 for subsequent tailings discharge; by adding the tailings slag screen 130 after the fine screening tailings slag tank 110, the fiber loss in the tailings can be reduced, the unit consumption of raw materials can be reduced, and thus the production cost can be reduced. At the same time, after the separation treatment of the tailings slag screen 130, the discharge volume of the tailings can be effectively reduced, and the situation where the tailings are too large to be discharged in the ditch can be effectively reduced, and the situation of on-site sanitary pollution can be reduced.
[0065] See also Figure 2-3 , in some embodiments, further comprising:
[0066] A slurry discharge pump 150, wherein the slurry inlet of the slurry discharge pump 150 is connected to the transition slag trough 140, and the slurry discharge pump 150 is used to discharge the slurry in the transition slag trough 140 to the PM7 workshop.
[0067] By adding a slurry discharge pump 150, the slurry in the transition slag trough 140 can be discharged to the PM7 workshop for subsequent discharge treatment.
[0068] In some embodiments, the tailings screen 130 is a pressure screen. By adopting a pressure screen for the tailings screen 130, the pressure screen is mainly composed of a screen drum, a rotor, a housing and a transmission device, wherein the screen drum adopts a fine screen with a screen gap width of H0.15mm, and uses water jet cutting technology to slot on an 8mm thick steel plate to form excellent round holes and burr-free notches, which will not produce stress and slot end cracks like mechanical grinding notches. And a hardness entanglement process can be provided to improve wear resistance. The rotor rotor is a refined pulp rotor equipped with 3-4 rotors, which are strictly corrected and balanced after assembly so that the rotor does not vibrate when rotating at high speed. The rotor is mounted on the main shaft, and the rotor is mounted on the rotor through a screw rod, and the gap between the rotor and the screen drum can be adjusted. The coarse screen rotor adopts a drum-type external rotor structure and corrects the dynamic balance. This structure can prevent impurities from winding around the rotor and affecting the normal operation of the equipment. The housing consists of an upper cover and a cylinder, and a tangential pulp inlet pipe is provided at the lower part of the cylinder. There is a slurry outlet pipe in the middle of the cylinder, and a slag outlet and a flushing water outlet are provided on the upper cover. The transmission device includes a motor, a pulley, a V-belt, a belt tensioning device, a main shaft and a bearing. The pressure screen adopts an upflow structure design with slurry entering from the bottom, heavy slag discharged from the bottom and light slag discharged from the top. Light impurities and air in the slurry naturally rise to the top slag outlet for discharge, and heavy impurities can settle to the bottom for discharge as soon as they enter the machine body.
[0069] See also Figure 4-6 In other embodiments, the tailings screen 130 includes:
[0070] An outer tank 210, wherein a plurality of sedimentation ports 211 are provided at intervals at the bottom of the outer tank 210;
[0071] An inner tank 220, wherein the inner tank 220 is disposed in the outer tank 210, the inner tank 220 is communicated with a sedimentation port 211 on the outer tank 210, and the sedimentation port 211 is disposed downwardly and inclined toward the inner tank 220;
[0072] A feed pipe 230, one end of which is connected to the slurry discharge port of the slurry feed pump 120, and the other end of which is connected to the outer tank 210;
[0073] A discharge pipe 240, one end of which is connected to the outer tank 210, and the other end of which is connected to the pulper of the OCC line;
[0074] A slurry discharge pipe 260, one end of which is connected to the inner tank 220, and the other end of which is connected to the transition slag tank 140;
[0075] The dispersion mechanism 250 is disposed on the outer tank 210 , and is used to disperse and stir the tail slurry in the outer tank 210 .
[0076] The feed pump 120 feeds the tailings in the fine screen tailings slag tank 110 into the outer tank 210 through the feed pipe 230, and then the dispersion mechanism 250 on the outer tank 210 disperses and stirs the tailings, thereby dispersing the heavy slag and the light slag in the tailings. Since the density of the heavy slag in the tailings is greater than that of the light slag, the heavy slag will fall into a plurality of sedimentation ports 211, and then the heavy slag will flow into the inner tank 220 from the sedimentation ports 211. The downward tilting setting of the sedimentation ports 211 is conducive to the heavy slag. The material flows into the inner tank 220 for separation; the light residue floats on the water surface, flows out from the discharge pipe 240 with the water flow, and is then sent to the pulper for disintegration, while the heavy residue in the inner tank 220 is sent to the transition residue tank 140 through the pulp discharge pipe 260; the heavy residue in the tailings can be separated from the light residue, the separation and sedimentation are stable, the operation is simple, time-saving and labor-saving, and the work efficiency is improved, and the light residue is sent to the pulper for disintegration, which can reduce the fiber loss in the tailings. Among them, the dispersion mechanism 250 uses a knife-type disperser, wherein the knife-type disperser includes a blade, and the blade (knife-type structure) mainly plays a role in dispersing and stirring the waste paper pulping tailings.
[0077] In some embodiments, there are two dispersion mechanisms 250, which are symmetrically arranged in the outer tank 210. The two dispersion mechanisms 250 are symmetrically arranged to disperse and stir the waste paper pulping tailings, play a dispersing and stirring role, and assist water circulation.
[0078] In some embodiments, a maintenance port 221 is provided on the inner tank 220. By providing the maintenance port 221 on the inner tank 220, it is convenient for maintenance personnel to repair the inner tank 220.
[0079] In some embodiments, the upper opening of the precipitation port 211 is rectangular, so as to prevent the occurrence of slag jam. It should be noted that in this embodiment, the upper opening of the precipitation port 211 is not limited to a shape, and in other embodiments, it can also be circular or square.
[0080] In some embodiments, a first flow guide pipe 231 and a second flow guide pipe 241 are also included; the feed pipe 230 is connected to the outer trough 210 through the first flow guide pipe 231; the discharge pipe 240 is connected to the outer trough 210 through the second flow guide pipe 241, and the first flow guide pipe 231 and the second flow guide pipe 241 are provided to guide and assist water circulation. The first flow guide pipe 231 and the second flow guide pipe 241 are made of guide plates. The feed pipe 230 is integrally formed with the first flow guide pipe 231, and the discharge pipe 240 is integrally formed with the second flow guide pipe 241; or in other embodiments, the feed pipe 230 is fixedly connected to the first flow guide pipe 231 by welding, and the discharge pipe 240 is fixedly connected to the second flow guide pipe 241 by welding.
[0081] In some embodiments, the plurality of sedimentation ports 211 are respectively arranged on the bottom of the outer trough 210 in a clockwise direction from dense to sparse intervals, and the plurality of sedimentation ports 211 are respectively arranged in a clockwise direction from dense to sparse intervals, so as to facilitate the sedimentation of heavy slag.
[0082] See also Figure 2-3 and Figure 7 In another embodiment, a pulping OCC line includes the tail stock processing device for reducing fiber loss in the above embodiment. The tail stock processing device for reducing fiber loss includes:
[0083] A fine screening tailings slurry trough 110, wherein the fine screening tailings slurry trough 110 is used to receive tailings after fine screening of a pulping OCC line, ONP line or DIP line;
[0084] A slurry feed pump 120, wherein the slurry inlet of the slurry feed pump 120 is connected to the fine screening tailings slurry tank 110;
[0085] A tailings screen 130, wherein the pulp inlet of the tailings screen 130 is connected to the pulp delivery port of the pulp feed pump 120, and the pulp outlet of the tailings screen 130 is connected to the pulper of the OCC line;
[0086] The transition slag chute 140 is connected to the slag discharge port of the tailing slag screen 130 .
[0087] In the PM8 pulping workshop, after the tailings produced after the three-stage fine screening of the OCC line, the three-stage fine screening of the ONP line, and the three-stage fine screening of the DIP line are discharged into the fine screening tailings slag tank 110, the tailings in the fine screening tailings slag tank 110 are pumped to the tailings slag screen 130 for separation treatment by the pulp inlet pump 120, and the good pulp obtained by the separation treatment is sent to the pulper of the OCC line for re-disintegration, recycled through the process, and then the slag obtained after the separation treatment is discharged into the transition slag tank 140 for subsequent tailings discharge; by adding the tailings slag screen 130 after the fine screening tailings slag tank 110, the fiber loss in the tailings can be reduced, the unit consumption of raw materials can be reduced, and thus the production cost can be reduced. At the same time, after the separation treatment of the tailings slag screen 130, the discharge volume of the tailings can be effectively reduced, and the situation where the tailings are too large to be discharged in the ditch can be effectively reduced, and the situation of on-site sanitary pollution can be reduced.
[0088] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.
Claims
1. A tailings slurry processing device for reducing fiber loss, characterized in that: include: A fine screening tailings slurry trough, wherein the fine screening tailings slurry trough is used to receive tailings after fine screening of the pulping OCC line, ONP line or DIP line; A slurry feed pump, wherein the slurry inlet of the slurry feed pump is connected to the fine screen tailings slurry tank; A tailings screen, wherein the slurry inlet of the tailings screen is connected to the slurry delivery port of the slurry feed pump, and the slurry outlet of the tailings screen is connected to the pulper of the OCC line; A transition slag trough is connected to a slag discharge port of the tailings screen.
2. The tailings slurry processing device for reducing fiber loss according to claim 1 is characterized in that: Also includes: A slurry discharge pump, wherein the slurry inlet of the slurry discharge pump is connected to the transition slag trough, and the slurry discharge pump is used to discharge the slurry in the transition slag trough to the PM7 workshop.
3. The tailings slurry processing device for reducing fiber loss according to claim 1 is characterized in that: The tailings screen is a pressure screen.
4. The tail stock processing device for reducing fiber loss according to claim 1 is characterized in that: Tailings screen includes: An outer tank, wherein a plurality of sedimentation ports are arranged at intervals at the bottom of the outer tank; An inner tank, the inner tank is arranged in the outer tank, the inner tank is connected to a sedimentation port on the outer tank, and the sedimentation port is arranged to be inclined downward toward the inner tank; A feed pipe, one end of which is connected to the slurry discharge port of the slurry feed pump, and the other end of which is connected to the outer tank; A discharge pipe, one end of which is connected to the outer tank, and the other end of which is connected to the pulper of the OCC line; A slurry discharge pipe, one end of which is connected to the inner tank, and the other end of which is connected to the transition slag tank; A dispersion mechanism is provided on the outer tank and is used for dispersing and stirring the tail slurry in the outer tank.
5. The tail stock processing device for reducing fiber loss according to claim 4 is characterized in that: There are two dispersion mechanisms, which are symmetrically arranged in the outer groove.
6. The tail stock processing device for reducing fiber loss according to claim 4 is characterized in that: A maintenance opening is arranged on the inner tank.
7. The tail stock processing device for reducing fiber loss according to claim 4 is characterized in that: The upper opening shape of the precipitation port is rectangular.
8. A pulping OCC line, characterized in that: The invention comprises a tailings slurry processing device for reducing fiber loss as described in any one of claims 1 to 7.