Paper pulp waste residue screening equipment for papermaking

Abstract

Paper pulp waste residue screening equipment for papermaking relates to the technical field of screening equipment and comprises a cylindrical packaging barrel, a blocking barrel is coaxially and fixedly connected in the packaging barrel, a paper pulp after-filtration channel is formed through an area between the inner wall of the packaging barrel and the outer wall of the blocking barrel, and a screening barrel which is in friction fit with the inner wall of the blocking barrel is rotationally arranged in the blocking barrel. A plurality of filter hole sections with different mesh numbers are arranged on the circumferential wall of the screening barrel in the circumferential direction, and a paper pulp penetrating hole matched with the filter hole sections is formed in the blocking barrel. The paper pulp waste residue screening device solves the problems that paper pulp waste residue screening equipment in the prior art is limited by the influence of a screening structure, waste residues can only be screened out from paper pulp, waste residues with different particle sizes cannot be classified and screened according to different purposes of the waste residues, and the use range is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of screening equipment, in particular to a paper pulp waste screening device for papermaking. Background Art

[0002] Papermaking production is divided into two basic processes: pulping and papermaking. Pulping is the process of decomposing plant fiber raw materials into natural pulp or bleached pulp by mechanical methods, chemical methods or a combination of the two. Papermaking is the process of combining pulp fibers suspended in water into paper sheets that meet various requirements through various processing. In the process of pulp and papermaking, waste residues need to be screened. The screened pulp waste residues contain certain organic matter and can be used for composting. The fiber components in the waste residues can also be used as reinforcing materials to manufacture building boards, which can achieve resource recycling, reduce impact on the environment and create economic value.

[0003] The prior art discloses a patent with announcement number CN213762772U, which includes a base plate, a support column fixedly connected to the left side of the top of the base plate, a first electric push rod fixedly connected to the right side of the support column, a screening box fixedly connected to the right side of the first electric push rod, first sliders fixedly connected to both sides of the bottom of the screening box, a first slide groove used in conjunction with the first slider is provided on the top of the base plate, and a feed port is provided on the top of the screening box, which solves the problem that the existing equipment has low screening efficiency and is inconvenient to disassemble the screen, thus failing to meet user needs.

[0004] The existing devices including the above patents gradually exposed the shortcomings of the existing technology as they were used, mainly in the following aspects:

[0005] First, the existing pulp waste screening equipment is limited by the screening structure and can only screen out the waste from the pulp. It is unable to classify and screen the waste of different particle sizes according to the different uses of the waste, thus reducing the scope of use.

[0006] Second, when the existing pulp waste screening equipment is in use, as the screening structure screens the waste, some of the waste tends to adhere to the screening structure over time, requiring operators to regularly disassemble and clean it, which is labor-intensive.

[0007] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] In view of the defects in the prior art, the utility model provides a pulp waste residue screening device for papermaking, which is used to solve the problem that the pulp waste residue screening device in the traditional technology is limited by the screening structure and can only screen out the waste residue from the pulp, but cannot classify and screen the waste residue of different particle sizes according to the different uses of the waste residue, thereby reducing the scope of use.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] The papermaking pulp waste screening equipment comprises a cylindrical packaging cylinder, a retaining cylinder is coaxially fixedly connected to the packaging cylinder, and a pulp filtering passage is formed through the area between the inner wall of the packaging cylinder and the outer wall of the retaining cylinder.

[0011] A screening cylinder is rotatably arranged in the retaining cylinder and frictionally fits with the inner wall thereof. A plurality of filter hole sections with different mesh sizes are arranged on the peripheral wall of the screening cylinder along the circumferential direction. The retaining cylinder is provided with a pulp passing hole matching the filter hole section.

[0012] A backwashing chamber shell is vertically fixedly connected to the pulp post-filtration passage near the pulp passing hole, and a plurality of backwashing nozzles facing the pulp passing hole are evenly distributed on the side wall of the backwashing chamber shell.

[0013] As an optimized solution, a rotating shaft is vertically rotatably installed in the screening cylinder, and a vertically arranged side scraper plate is fixedly connected to the peripheral wall of the rotating shaft through a connecting rod, and the side scraper plate is in friction contact with the inner wall of the screening cylinder.

[0014] As an optimized solution, a bottom scraper plate is fixedly connected to a position of the rotating shaft near the lower end thereof and is in frictional contact with the bottom surface of the packaging cylinder.

[0015] As an optimized solution, the upper end of the screening cylinder is coaxially fixed with an upper support ring, the lower end of the screening cylinder is coaxially fixed with a lower support ring, the inner hole of the upper support ring is vertically fixed with a rotating drum, the rotating drum is rotatably installed on the upper end of the packaging cylinder, the upper port of the rotating drum extends to the outside of the packaging cylinder, and a feed drum is rotatably inserted therein.

[0016] As an optimized solution, a waste residue discharge valve body communicating with the inner cavity of the screening cylinder is fixedly connected to the lower end of the packaging cylinder near the inner hole of the lower support ring.

[0017] As an optimized solution, a maintenance port is opened on the wall of the packaging cylinder near the pulp passing hole, a closing plate for closing the maintenance port is fixed to the outer wall of the packaging cylinder by bolts, the backwash chamber shell is fixed to the inner wall of the closing plate, and a liquid inlet cylinder connected to the backwash chamber shell is fixed to the outer wall of the closing plate.

[0018] As an optimized solution, a pulp discharge valve body connected to the post-pulp filtration channel is fixedly connected to the side wall of the packaging cylinder near the lower end.

[0019] As an optimized solution, the lower end of the packaging cylinder is fixedly connected to a driving motor connected to the lower end of the rotating shaft.

[0020] As an optimized solution, a gear ring is fixedly connected to the outer wall of the rotating drum, a driving machine is fixedly connected to the upper end of the packaging cylinder, and the output shaft of the driving machine is meshed with the gear ring by means of a gear.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The pulp source is connected through the feed cylinder to introduce the pulp into the screening cylinder, wherein the screening cylinder is provided with a plurality of filter hole sections with different mesh sizes along the circumference. According to actual needs, the filter hole section with appropriate mesh size is selected to align with the pulp through hole. Due to the existence of the retaining cylinder, the pulp will only pass through the filter hole section aligned with the pulp through hole, so that the particle size of the waste residue can be screened according to the needs, and the waste residue of different particle sizes can be classified and screened according to the different uses of the waste residue. The filtered pulp enters the pulp post-filtration channel and is discharged through the pulp discharge valve body;

[0023] The driving machine drives the drum to rotate, and the drum uses the upper support ring to drive the screening cylinder to rotate, so that the filter hole sections with different mesh sizes are aligned with the pulp through-holes, so as to screen the particle size of the waste residue;

[0024] During the screening process of the waste residue, the driving motor drives the rotating shaft to rotate, and the rotating shaft drives the side scraper plate and the bottom scraper plate to rotate. The side scraper plate can scrape off the waste residue adhering to the inner wall of the screening cylinder to prevent affecting the efficiency of the pulp passing through the filter hole section;

[0025] When the waste residue needs to be discharged, the feeding is stopped, and the bottom scraper plate rotates to scrape the waste residue adhering to the bottom surface of the packaging cylinder, so that it is discharged along the waste residue discharge valve body, which is convenient and quick;

[0026] During use, when waste residue adheres to the screening cylinder and affects the filtering efficiency of the filter hole section on the pulp, the feeding is stopped, and the cleaning liquid is supplied into the backwashing chamber shell by the liquid inlet cylinder, and the screening cylinder is backwashed by the backwashing nozzle, and the screening cylinder is driven to rotate by the driving machine to realize the reverse cleaning of the entire screening cylinder. The liquid and waste residue after reverse cleaning are discharged to the outside of the device through the waste residue discharge valve body or the pulp discharge valve body, which is convenient and fast and reduces the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific 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 specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 It is a schematic diagram of the structure of the screening cylinder of the utility model when viewed from above.

[0030] In the figure: 1-packaging cylinder, 2-blocking cylinder, 3-screening cylinder, 4-filter hole section, 5-rotating shaft; 6-connecting rod; 7-side scraper plate; 8-bottom scraper plate; 9-driving motor; 10-waste residue discharge valve body; 11-lower support ring; 12-upper support ring; 13-rotating cylinder; 14-feeding cylinder; 15-gear ring; 16-driving machine; 17-pulp discharge valve body; 18-maintenance port; 19-closing plate; 20-backwashing chamber shell; 21-backwashing nozzle; 22-liquid inlet cylinder; 23-pulp passing hole. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0032] like Figure 1 and Figure 2 As shown, the papermaking pulp waste screening equipment comprises a cylindrical packaging cylinder 1, a retaining cylinder 2 is coaxially fixed inside the packaging cylinder 1, and a pulp filtering passage is formed through the area between the inner wall of the packaging cylinder 1 and the outer wall of the retaining cylinder 2.

[0033] A screening cylinder 3 is provided in rotation in the retaining cylinder 2 and is frictionally fitted with the inner wall thereof. A plurality of filter hole sections 4 with different mesh sizes are provided on the peripheral wall of the screening cylinder 3 in the circumferential direction. The retaining cylinder 2 is provided with a pulp passing hole 23 matching the filter hole section 4.

[0034] A backwashing chamber shell 20 is vertically fixedly connected to the pulp post-filtration passage near the pulp through hole 23 , and a plurality of backwashing nozzles 21 facing the pulp through hole 23 are evenly distributed on the side wall of the backwashing chamber shell 20 .

[0035] A rotating shaft 5 is vertically rotatably installed in the screening cylinder 3 , and a vertically arranged side scraper plate 7 is fixedly connected to the peripheral wall of the rotating shaft 5 through a connecting rod 6 . The side scraper plate 7 is in friction contact with the inner wall of the screening cylinder 3 .

[0036] A bottom scraper plate 8 is fixedly connected to a position near the lower end of the rotating shaft 5 and is in frictional contact with the inner bottom surface of the packaging cylinder 1 .

[0037] An upper support ring 12 is coaxially fixed to the upper end of the screening cylinder 3, a lower support ring 11 is coaxially fixed to the lower end of the screening cylinder 3, a rotating drum 13 is vertically fixed to the inner hole of the upper support ring 12, the rotating drum 13 is rotatably installed on the upper end of the packaging cylinder 1, the upper port of the rotating drum 13 extends to the outside of the packaging cylinder 1, and a feed drum 14 is rotatably inserted therein.

[0038] A waste residue discharge valve body 10 communicating with the inner cavity of the screening cylinder 3 is fixedly connected to the lower end of the packaging cylinder 1 near the inner hole of the lower support ring 11 .

[0039] A maintenance port 18 is provided on the wall of the packaging cylinder 1 near the pulp passing hole 23, and a closing plate 19 for closing the maintenance port 18 is fixed on the outer wall of the packaging cylinder 1 by bolts. The backwashing chamber shell 20 is fixedly connected to the inner wall of the closing plate 19, and a liquid inlet cylinder 22 connected to the backwashing chamber shell 20 is fixedly connected to the outer wall of the closing plate 19, so as to facilitate maintenance of the backwashing chamber shell 20.

[0040] A pulp discharge valve body 17 communicating with a pulp post-filtration passage is fixedly connected to a side wall of the packaging cylinder 1 near the lower end.

[0041] A driving motor 9 connected to the lower end of the rotating shaft 5 is fixedly connected to the lower end of the packaging cylinder 1 .

[0042] A gear ring 15 is fixedly connected to the outer wall of the rotating drum 13 , and a driving machine 16 is fixedly connected to the upper end of the packaging cylinder 1 . The output shaft of the driving machine 16 is meshed with the gear ring 15 via a gear.

[0043] The working principle of this device is:

[0044] The pulp source is connected through the feed cylinder 14 to introduce the pulp into the screening cylinder 3, wherein the screening cylinder 3 is provided with a plurality of filter hole sections 4 with different mesh sizes along the circumferential direction. According to actual needs, the filter hole section 4 with a suitable mesh size is selected to align with the pulp through hole 23. Due to the existence of the retaining cylinder 2, the pulp will only pass through the filter hole section 4 aligned with the pulp through hole 23, so that the particle size of the waste residue can be screened according to the needs, and the waste residues of different particle sizes can be classified and screened according to the different uses of the waste residues. The filtered pulp enters the pulp post-filtration channel and is discharged through the pulp discharge valve body 17;

[0045] The driving machine 16 drives the drum 13 to rotate, and the drum 13 drives the screening drum 3 to rotate by the upper support ring 12, so that the filter hole sections 4 with different mesh sizes are aligned with the pulp passing hole 23, so as to screen the particle size of the waste residue;

[0046] During the screening process of the waste residue, the driving motor 9 drives the rotating shaft 5 to rotate, and the rotating shaft 5 drives the side scraper plate 7 and the bottom scraper plate 8 to rotate, and the side scraper plate 7 scrapes off the waste residue adhering to the inner wall of the screening cylinder 3 to prevent affecting the efficiency of the pulp passing through the filter hole section 4;

[0047] When the waste residue needs to be discharged, the feeding is stopped, and the bottom scraper plate 8 rotates to scrape the waste residue adhering to the inner bottom surface of the packaging cylinder 1, so that it is discharged along the waste residue discharge valve body 10, which is convenient and quick;

[0048] During use, when waste residue adheres to the screening cylinder 3 and affects the filtering efficiency of the filter hole section 4 on the pulp, the feeding is stopped, and the cleaning liquid is supplied into the backwashing chamber shell 20 by means of the liquid inlet cylinder 22, and the screening cylinder 3 is backwashed by means of the backwashing nozzle 21, and the screening cylinder 3 is driven to rotate by the driving machine 16, so that the entire screening cylinder 3 can be backwashed, and the liquid and waste residue after the backwashing are discharged to the outside of the device through the waste residue discharge valve body 10 or the pulp discharge valve body 17, which is convenient and quick and reduces the labor intensity.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. Papermaking waste pulp screening equipment, characterized by: It comprises a cylindrical packaging cylinder (1), a retaining cylinder (2) being coaxially fixedly connected inside the packaging cylinder (1), and a pulp post-filtration channel is formed through the area between the inner wall of the packaging cylinder (1) and the outer wall of the retaining cylinder (2). A screening cylinder (3) is rotatably disposed in the retaining cylinder (2) and is in frictional contact with the inner wall thereof. A plurality of filter hole sections (4) with different mesh sizes are disposed on the peripheral wall of the screening cylinder (3) in the circumferential direction. The retaining cylinder (2) is provided with a pulp passing hole (23) matching the filter hole section (4). A backwashing chamber shell (20) is vertically fixedly connected to a position of the pulp post-filtration passage close to the pulp passing hole (23), and a plurality of backwashing nozzles (21) facing the pulp passing hole (23) are evenly distributed on the side wall of the backwashing chamber shell (20).

2. The papermaking waste pulp screening equipment according to claim 1, characterized in that: A rotating shaft (5) is installed in the screening cylinder (3) for vertical rotation. A vertically arranged side scraper plate (7) is fixedly connected to the peripheral wall of the rotating shaft (5) via a connecting rod (6). The side scraper plate (7) is in frictional contact with the inner wall of the screening cylinder (3).

3. The papermaking waste pulp screening equipment according to claim 2, characterized in that: A bottom scraper plate (8) is fixedly connected to a position near the lower end of the rotating shaft (5) and is in frictional contact with the inner bottom surface of the packaging cylinder (1).

4. The papermaking waste pulp screening equipment according to claim 3, characterized in that: The upper end of the screening cylinder (3) is coaxially fixedly connected to an upper support ring (12), the lower end of the screening cylinder (3) is coaxially fixedly connected to a lower support ring (11), the inner hole of the upper support ring (12) is vertically fixedly connected to a rotating drum (13), the rotating drum (13) is rotatably mounted on the upper end of the packaging cylinder (1), the upper port of the rotating drum (13) extends to the outside of the packaging cylinder (1), and a feeding drum (14) is rotatably inserted therein.

5. The papermaking waste pulp screening equipment according to claim 4, characterized in that: A waste residue discharge valve body (10) connected to the inner cavity of the screening cylinder (3) is fixedly connected to the lower end of the packaging cylinder (1) near the inner hole of the lower support ring (11).

6. The papermaking waste pulp screening equipment according to claim 5, characterized in that: A maintenance opening (18) is provided on the wall of the packaging cylinder (1) near the pulp passing hole (23); a closing plate (19) closing the maintenance opening (18) is fixed to the outer wall of the packaging cylinder (1) by means of bolts; and the backwash chamber shell (20) is fixedly connected to the inner wall of the closing plate (19).

7. The papermaking waste pulp screening equipment according to claim 6, characterized in that: A liquid inlet cylinder (22) connected to the backwash chamber shell (20) is fixedly connected to the outer wall of the closing plate (19).

8. The papermaking waste pulp screening equipment according to claim 7, characterized in that: A pulp discharge valve body (17) connected to the post-pulp filtration channel is fixedly connected to the side wall of the packaging cylinder (1) close to the lower end.

9. The papermaking waste pulp screening equipment according to claim 8, characterized in that: The lower end of the packaging cylinder (1) is fixedly connected to a driving motor (9) which is connected to the lower end of the rotating shaft (5).

10. The papermaking waste pulp screening equipment according to claim 9, characterized in that: A gear ring (15) is fixedly connected to the outer wall of the rotating cylinder (13), a driving machine (16) is fixedly connected to the upper end of the packaging cylinder (1), and an output shaft of the driving machine (16) is meshed with the gear ring (15) via a gear.

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