CN219709929U

CN219709929U - Fine screening tailings treatment system

Info

Publication number: CN219709929U
Application number: CN202320721894.8U
Authority: CN
Inventors: 文学芬; 张德辉; 高宽; 樊飞; 廖贻青
Original assignee: Shanying South China Paper Co ltd
Current assignee: Shanying South China Paper Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-09-19
Anticipated expiration: 2033-04-04

Abstract

The utility model relates to a fine screening tailings treatment system which comprises a mixing device, a separating device, a recovery filtering device and a disc mill, wherein the mixing device is used for mixing tailings; the mixing device is internally provided with water and is used for mixing the tailings of the fine screen with the water; the separating device is communicated with a discharge port of the mixing device and is used for separating impurities in the fine screen tailings from fibers; the recovery filter device is communicated with a discharge port of the separation device and is used for collecting and filtering fibers in the fine screen tailings so as to obtain the fibers in the fine screen tailings; the discharge gate of disc mill is used for being connected with the pulper, and the disc mill is used for cutting off the fibre in the fine screen tailings after filtering to retrieve the fibre after cutting off to the pulper. According to the technical scheme, the fine screen tailings are further recycled, the fine screen tailings are prevented from being discharged into a trench, fibers are recycled, raw material consumption is reduced, and the method is more environment-friendly.

Description

Fine screening tailings treatment system

Technical Field

The utility model relates to the technical field of papermaking, in particular to a fine screening tailings treatment system.

Background

Before paper making, the waste paper raw material needs to be pulped (including fine screening treatment), and in order to meet the technological requirements of the paper making section of a paper machine, a large amount of fine screening tailings are usually generated after the waste paper raw material is subjected to fine screening treatment, and the fine screening tailings contain part of useful fibers, so that if the fine screening tailings are directly discharged into a trench, the fiber loss is wasted, the paper making production cost is increased, the treatment burden of papermaking sewage is increased, and the waste paper making section is not environment-friendly.

Disclosure of Invention

In view of the above problems, the utility model provides a fine screen tailings treatment system for solving the problems that the fine screen tailings are discharged into a trench, so that fiber loss and waste are caused, the papermaking production cost is increased, the treatment burden of papermaking sewage is increased, and the environment is not protected.

In order to achieve the above object, the inventors provide a fine screen tailings treatment system comprising a mixing device, a separating device, a recovery filtering device and a disc mill; the mixing device is internally provided with water and is used for mixing the tailings of the fine screen with the water; the separating device is communicated with a discharge port of the mixing device and is used for separating impurities in the fine screen tailings from fibers; the recovery filter device is communicated with a discharge port of the separation device and is used for collecting and filtering fibers in the fine screen tailings so as to obtain the fibers in the fine screen tailings; the discharge gate of disc mill is used for being connected with the pulper, and the disc mill is used for cutting off the fibre in the fine screen tailings after filtering to retrieve the fibre after cutting off to the pulper.

In some embodiments, the fine screen tailings treatment system further comprises a conveyor device through which the discharge port of the disc mill is connected to the pulper.

In some embodiments, the conveyor comprises a conveyor belt or a conveyor trolley.

In some embodiments, the fine screen tailings treatment system further comprises a waste recovery tank coupled to the slag tap of the separation apparatus, the waste recovery tank configured to recover impurities from the fine screen tailings.

In some embodiments, the separation device comprises a first chamber and a second chamber from top to bottom, wherein a discharge hole is formed in the first chamber, the second chamber is in a funnel shape, a slag hole is formed in the bottom of the second chamber, and the slag hole is used for discharging impurities in tailings of the fine screen.

In some embodiments, the recovery filter device comprises a recovery tank and a filter screen, wherein the filter screen is arranged in the recovery tank and is used for filtering water so as to obtain fibers in the fine screen tailings.

In some embodiments, the fine screen tailings treatment system further comprises a drying device, wherein the drying device is arranged between the recovery filtering device and the disc grinder, the drying device is used for drying the fibers in the fine screen tailings, and the disc grinder is used for cutting off the fibers in the dried fine screen tailings.

In some embodiments, the disc grinder includes a disc grinder and a first drive device; the disc mill comprises an upper mill and a lower mill which are rotationally connected, a feed inlet communicated with the lower mill is arranged on the upper mill, the lower surface of the upper mill is in clearance fit with the upper surface of the lower mill, a material receiving port is arranged at the contact part of the lower mill and the bottom edge of the upper mill, a material storage chamber communicated with the material receiving port is arranged in the lower mill, and a material outlet is formed in the bottom of the material storage chamber; the output end of the first driving device is connected with the upper mill, and the first driving device is used for driving the upper mill to rotate relative to the lower mill.

In some embodiments, the first drive means comprises a motor, a drive bevel gear, a driven bevel gear, and a shaft; the motor is connected with the driving bevel gear, the driving bevel gear is meshed with the driven bevel gear, the driven bevel gear is connected with the rotating shaft, and the rotating shaft is connected with the upper mill.

Compared with the prior art, the technical scheme is characterized in that fine screen tailings are further recycled, the fine screen tailings are firstly mixed with water to scatter the fine screen tailings, impurities in the fine screen tailings are heavier than fibers, so that the fibers are separated from the impurities through a separating device, then the fibers are recycled through a recycling and filtering device and obtained after water is filtered, finally, in order to make the obtained fibers finer, the filtered fibers are cut through a disc mill and then put into a pulper for use. Therefore, the fine screening tailings are prevented from being discharged into a trench, fibers are recovered, the raw material consumption is reduced, and the method is more environment-friendly.

The foregoing summary is merely an overview of the present utility model, and may be implemented according to the text and the accompanying drawings in order to make it clear to a person skilled in the art that the present utility model may be implemented, and in order to make the above-mentioned objects and other objects, features and advantages of the present utility model more easily understood, the following description will be given with reference to the specific embodiments and the accompanying drawings of the present utility model.

Drawings

The drawings are only for purposes of illustrating the principles, implementations, applications, features, and effects of the present utility model and are not to be construed as limiting the utility model.

In the drawings of the specification:

FIG. 1 is a schematic diagram of a fine screen tailings treatment system according to an embodiment;

FIG. 2 is another schematic diagram of a fine screen tailings treatment system according to an embodiment;

FIG. 3 is a schematic view of a disc grinder according to an embodiment;

FIG. 4 is a schematic structural view of a recovery filter device according to an embodiment;

fig. 5 is a schematic view of another structure of the recovery filter device according to the embodiment.

Reference numerals referred to in the above drawings are explained as follows:

100. a fine screening tailings treatment system;

1. a mixing device;

2. a separation device;

21. a first chamber;

22. a second chamber;

3. recovering and filtering the device;

31. a recovery box;

32. a filter screen;

33. a support block;

4. a disc grinder;

41. disc grinding;

411. grinding;

412. grinding down;

413. a feed inlet;

414. a material receiving port;

415. a storage chamber;

416. a material outlet;

42. a first driving device;

421. a motor;

422. a drive bevel gear;

423. a driven bevel gear;

424. a rotating shaft;

5. a conveying device;

6. a waste recovery tank;

7. a pulper.

Detailed Description

In order to describe the possible application scenarios, technical principles, practical embodiments, and the like of the present utility model in detail, the following description is made with reference to the specific embodiments and the accompanying drawings. The embodiments described herein are only for more clearly illustrating the technical aspects of the present utility model, and thus are only exemplary and not intended to limit the scope of the present utility model.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are they particularly limited to independence or relevance from other embodiments. In principle, in the present utility model, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment may be combined in any manner to form a corresponding implementable technical solution.

Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present utility model pertains; the use of related terms herein is for the purpose of describing particular embodiments only and is not intended to limit the utility model.

In the description of the present utility model, the term "and/or" is a representation for describing a logical relationship between objects, which means that three relationships may exist, for example a and/or B, representing: there are three cases, a, B, and both a and B. In addition, the character "/" herein generally indicates that the front-to-back associated object is an "or" logical relationship.

In the present utility model, terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, order, or sequence of such entities or operations.

Without further limitation, the use of the terms "comprising," "including," "having," or other like terms in this specification is intended to cover a non-exclusive inclusion, such that a process, method, or article of manufacture that comprises a list of elements does not include additional elements but may include other elements not expressly listed or inherent to such process, method, or article of manufacture.

As in the understanding of "review guidelines," the expressions "greater than", "less than", "exceeding" and the like are understood to exclude this number in the present utility model; the expressions "above", "below", "within" and the like are understood to include this number. Furthermore, in the description of embodiments of the present utility model, the meaning of "a plurality of" is two or more (including two), and similarly, the expression "a plurality of" is also to be understood as such, for example, "a plurality of" and the like, unless specifically defined otherwise.

In the description of embodiments of the present utility model, spatially relative terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," etc., are used herein as a basis for the description of the embodiments or as a basis for the description of the embodiments, and are not intended to indicate or imply that the devices or components referred to must have a particular position, a particular orientation, or be configured or operated in a particular orientation and therefore should not be construed as limiting the embodiments of the present utility model.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "affixed," "disposed," and the like as used in the description of embodiments of the utility model should be construed broadly. For example, the "connection" may be a fixed connection, a detachable connection, or an integral arrangement; the device can be mechanically connected, electrically connected and communicated; it can be directly connected or indirectly connected through an intermediate medium; which may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the embodiments of the present utility model can be understood by those skilled in the art to which the present utility model pertains according to circumstances.

Referring to fig. 1 and 2, the present embodiment relates to a fine screening tailings treatment system 100, which includes a mixing device 1, a separating device 2, a recovery filtering device 3, and a disc grinder 4; the mixing device 1 is internally provided with water, and the mixing device 1 is used for mixing fine screen tailings with the water; the separation device 2 is communicated with a discharge port of the mixing device 1, and the separation device 2 is used for separating impurities in the fine screen tailings from fibers; the recovery filter device 3 is communicated with a discharge port of the separation device 2, and the recovery filter device 3 is used for collecting and filtering fibers in the fine screening tailings so as to obtain the fibers in the fine screening tailings; the discharge port of the disc mill 4 is used for being connected with the pulper 7, the disc mill 4 is used for cutting off the fibers in the fine screen tailings after filtration, and the cut fibers are recycled to the pulper 7.

The mixing device 1 is filled with water, and the fine screen tailings are dispersed under the action of the water. In addition, over time, heavier impurities within the fine screen tailings may sink under the force of gravity. Thus, the supernatant of the mixing device 1 is generally taken for subsequent separation. In some embodiments, to avoid dispersion of the fine screen tailings, a stirrer may be further provided to stir the mixing apparatus 1.

The separating device 2 is in communication with the discharge opening of the mixing device 1, optionally the discharge opening of the mixing device 1 is arranged in the upper layer of the mixing device 1. The separating device 2 is used for separating impurities in the fine screen tailings from fibers. Specifically, the separating device 2 comprises a first chamber 21 and a second chamber 22 from top to bottom (i.e. the direction indicated by the arrow in fig. 1), wherein a discharge port is arranged on the first chamber 21, the discharge port is used for conveying lighter fibers into the recovery filtering device 3, and the second chamber 22 is funnel-shaped and provided with a slag hole at the bottom, and the slag hole is used for discharging heavier impurities. In actual use, the separation device 2 generates vortex inside under the action of water flow, so that lighter fibers float on the upper layer and flow into the recovery filter device 3 along with the water flow, and heavier impurities are precipitated and discharged from the slag outlet.

The recovery filter 3 recovers the fibers flowing out of the separator 2, and filters the water to obtain pure fibers.

Because of the different paper production requirements, there are demands for finer fibers. Therefore, the filtered fibers need to be further processed, and a disc grinder 4 is provided. The fibers are cut by the disc refiner 4, and the cut fibers are fed into the pulper 7 for use. Optionally, disc grinder 4 is 450 disc grinder 4.

Compared with the prior art, the technical scheme is characterized in that the fine screening tailings are further recycled, the fine screening tailings are firstly mixed with water to scatter the fine screening tailings, the impurities in the fine screening tailings are heavier than the fibers, so that the fibers are separated from the impurities through the separating device 2, then the fibers are obtained after being recycled through the recycling filtering device 3 and filtered by the water, and finally, the filtered fibers are cut through the disc mill 4 and then are put into the pulper 7 for use in order to make the obtained fibers finer. Therefore, the fine screening tailings are prevented from being discharged into a trench, fibers are recovered, the raw material consumption is reduced, and the method is more environment-friendly.

According to some embodiments of the present utility model, optionally, as shown in fig. 1 and 2, the fine screen tailings treatment system 100 further comprises a conveyor 5, and the discharge port of the disc mill 4 is connected to the pulper 7 through the conveyor 5.

In order to facilitate the re-feeding of the fibres cut by the disc refiner 4 into the pulper 7, a conveyor 5 is also provided. Optionally, the conveyor 5 comprises a conveyor belt or a conveyor trolley. When the conveying device 5 is a conveying belt, one end of the conveying belt is connected with a discharge hole of the disc grinder 4, and the other end of the conveying belt is connected with the pulper 7.

Optionally, as shown in fig. 2, the fine screen tailings treatment system 100 further comprises a waste recovery tank 6, the waste recovery tank 6 being connected to the slag outlet of the separation apparatus 2, the waste recovery tank 6 being adapted to recover impurities from the fine screen tailings, according to some embodiments of the present utility model.

In order to avoid direct external pollution discharge of impurities in the fine screening tailings, a waste recovery tank 6 is also provided. The waste recovery box 6 is used for further treatment after recovering impurities in the fine screening tailings, so that the environment pollution is avoided.

According to some embodiments of the present utility model, optionally, as shown in fig. 4 and 5, the recovery filtering device 3 includes a recovery tank 31 and a filter screen 32, where the filter screen 32 is installed in the recovery tank 31, and the filter screen 32 is used for filtering water to obtain fibers in the fine-screened tailings.

After the separation device 2 separates the impurities, the mixture of water and fibers is sent to the recovery filter device 3. Since the subsequent disc grinder 4 needs to cut the fibers, the water needs to be filtered. The recovery filter device 3 comprises a recovery tank 31 and a filter screen 32, optionally, support blocks 33 are mounted on the inner sides of the recovery tank 31, and the filter screen 32 is mounted on the support blocks 33. In some embodiments, as shown in fig. 4, filter screen 32 is positioned above and spaced from the discharge port of separator 2 by a distance such that filter screen 32 is flipped over (as indicated by the arrow in fig. 4), and the filtered fibers are poured into disc grinder 4. In other embodiments, as shown in fig. 5, a recovery box 31 is provided, and a hole into which a filter screen 32 is inserted is formed at one side above a support block 33, through which the filter screen 32 can take out and pour out the filtered fibers. As a preferred embodiment, to facilitate the handling of filter 32, a handle is also mounted on one side of filter 32.

According to some embodiments of the present utility model, optionally, the fine screen tailings treatment system 100 further comprises a drying device, wherein the drying device is disposed between the recovery filtering device 3 and the disc grinder 4, the drying device is used for drying the fibers in the fine screen tailings, and the disc grinder 4 is used for cutting the fibers in the dried fine screen tailings. In order to enable the disc grinder 4 to cut off the fibers better, a drying device is arranged between the recovery filtering device 3 and the disc grinder 4, and the drying device can dry the fibers in the fine screen tailings.

Optionally, as shown in fig. 3, the disc grinder 4 comprises a disc grinder 41 and a first driving device 42 according to some embodiments of the present utility model; the disc mill 41 comprises an upper mill 411 and a lower mill 412 which are rotationally connected, wherein a feed inlet 413 communicated with the lower mill 412 is formed in the upper mill 411, the lower surface of the upper mill 411 is in clearance fit with the upper surface of the lower mill 412, a material receiving port 414 is formed in the contact part of the lower mill 412 and the bottom edge of the upper mill 411, a material storage chamber 415 communicated with the material receiving port 414 is formed in the lower mill 412, and a material outlet 416 is formed in the bottom of the material storage chamber 415; the output end of the first driving device 42 is connected with the upper mill 411, and the first driving device 42 is used for driving the upper mill 411 to rotate relative to the lower mill 412.

Optionally, as shown in fig. 3, the first driving device 42 includes a motor 421, a drive bevel gear 422, a driven bevel gear 423, and a rotation shaft 424 according to some embodiments of the present utility model; the motor 421 is connected with the drive bevel gear 422, the drive bevel gear 422 is meshed with the driven bevel gear 423, the driven bevel gear 423 is connected with the rotating shaft 424, and the rotating shaft 424 is connected with the upper mill 411.

When the disc grinder 4 cuts off the fibers, the motor 421 is started, the motor 421 drives the drive bevel gear 422 to rotate, the drive bevel gear 422 drives the driven bevel gear 423 to rotate, thereby driving the rotating shaft 424 to rotate, the rotating shaft 424 rotates to drive the upper grinder 411 to rotate, the upper grinder 411 rotates and the lower grinder 412 is static to do relative motion, at the moment, the fibers are sequentially put into the upper grinder 411 from the feeding port 413, then the fibers are gradually pushed to the edge of the upper grinder 411 after being ground by the upper grinder 411 and the lower grinder 412 along with the rotation of the upper grinder 411, then enter the storage chamber 415 from the material receiving port 414, and after the grinding is completed, the fibers enter the storage chamber 415, and then the motor 421 is stopped, so that the disc grinder 4 stops running.

Finally, it should be noted that, although the embodiments have been described in the text and the drawings, the scope of the utility model is not limited thereby. The technical scheme generated by replacing or modifying the equivalent structure or equivalent flow by utilizing the content recorded in the text and the drawings of the specification based on the essential idea of the utility model, and the technical scheme of the embodiment directly or indirectly implemented in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A fine screen tailings treatment system, comprising:

the mixing device is filled with water and is used for mixing fine screen tailings with the water;

the separating device is communicated with the discharge port of the mixing device and is used for separating impurities in the fine screen tailings from fibers;

the recovery filtering device is communicated with the discharge port of the separating device and is used for collecting and filtering fibers in the fine screen tailings so as to obtain the fibers in the fine screen tailings;

the discharge gate of disc mill is used for being connected with the pulper, the disc mill is used for cutting off the fiber in the fine screen tailings after filtering to retrieve the fiber after cutting off to the pulper.

2. The fine screen tailings treatment system of claim 1 further comprising a conveyor, wherein the discharge outlet of the disc mill is connected to the pulper by the conveyor.

3. The fine screen tailings treatment system of claim 2 wherein the conveyor apparatus comprises a conveyor belt or a conveyor cart.

4. The fine screen tailings treatment system of claim 1 further comprising a waste recovery tank coupled to the slag outlet of the separation apparatus, the waste recovery tank configured to recover impurities from the fine screen tailings.

5. The fine screen tailings treatment system of claim 1 wherein the separation apparatus comprises a first chamber and a second chamber from top to bottom, wherein the first chamber is provided with a discharge port, the second chamber is funnel-shaped, and a slag outlet is formed in the bottom of the second chamber, and is used for discharging impurities in the fine screen tailings.

6. The fine screen tailings treatment system of claim 1 wherein the recovery filtration apparatus comprises a recovery tank and a filter screen mounted within the recovery tank, the filter screen for filtering water to obtain fibers from the fine screen tailings.

7. The fine screen tailings treatment system of claim 1 further comprising a drying apparatus disposed between the recovery filter apparatus and the disc grinder, the drying apparatus configured to dry the fibers in the fine screen tailings, and the disc grinder configured to cut the fibers in the fine screen tailings after drying.

8. The fine screen tailings treatment system of claim 1 wherein the disc refiner comprises a disc refiner and a first drive;

the disc mill comprises an upper mill and a lower mill which are rotationally connected, wherein a feed inlet leading to the lower mill is arranged on the upper mill, the lower surface of the upper mill is in clearance fit with the upper surface of the lower mill, a material receiving port is arranged at the contact part of the lower mill and the bottom edge of the upper mill, a material storage chamber communicated with the material receiving port is arranged in the lower mill, and a material outlet is formed in the bottom of the material storage chamber;

the output end of the first driving device is connected with the upper mill, and the first driving device is used for driving the upper mill to rotate relative to the lower mill.

9. The fine screen tailings treatment system of claim 8 wherein the first drive apparatus comprises a motor, a drive bevel gear, a driven bevel gear, and a shaft;

the motor is connected with the driving bevel gear, the driving bevel gear is meshed with the driven bevel gear, the driven bevel gear is connected with the rotating shaft, and the rotating shaft is connected with the upper mill.