Backwash screening device for slurry residues
By combining a backwashing screening device with a screw conveyor, the problems of low pulp-to-slag separation efficiency and easy clogging in the papermaking process are solved, improving pulp purity and paper quality, and realizing efficient recycling of resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANYING PAPER (JILIN) CO LTD
- Filing Date
- 2025-03-17
- Publication Date
- 2026-05-15
AI Technical Summary
In existing papermaking processes, pulp-water separation equipment suffers from low separation efficiency, easy clogging, and difficulty in cleaning, which affects paper quality and resource recycling.
Design a backwashing screening device that combines backwash water and centrifugal force with a screw conveyor to screen impurities of different densities by adjusting water pressure and centrifugal point, thereby achieving the separation of light slag, slurry slag and heavy slag, and dewatering treatment during screw conveying.
This improved the purity and quality of pulp, resulting in higher quality paper, while also enabling effective resource recycling and reducing production costs.
Smart Images
Figure CN224243558U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a backwashing and screening device for pulp residue, belonging to the technical field of papermaking industry equipment. Background Technology
[0002] During the papermaking process, pulp contains a certain proportion of residues, such as fiber residues and impurities. The presence of these residues affects the quality and strength of the paper and reduces the utilization efficiency of the pulp. Therefore, separating these residues from the pulp using separation equipment can improve the purity and quality of the pulp, thereby producing higher quality paper. At the same time, the separated residues can be recycled, reducing resource waste and lowering production costs. Therefore, pulp residue-water separation is of great significance for improving the efficiency and environmental performance of the papermaking industry.
[0003] Existing pulp residue water separation equipment discharges some pulp residue during the crushing and screening stage. This residue contains a significant amount of recyclable resources, such as lightweight plastics, heavy residue, and pulp residue. The process often suffers from problems such as low separation efficiency, easy clogging, and difficulty in cleaning. These devices typically employ simple filtration or sedimentation methods, resulting in a high content of fiber residue in the pulp, which affects the quality of the paper. Utility Model Content
[0004] In order to solve the problems of low separation efficiency, easy clogging and difficult cleaning in the crushing and screening section of the existing technology, we propose a technical solution entitled "A backwashing screening device for slurry residue".
[0005] One type of backwashing and screening device for slurry residue according to this utility model, such as... Figures 1-2 As shown, the screening device includes:
[0006] The slurry storage tank 1 has a slurry feed pipe 2 installed along the inner wall at the upper opening of the slurry storage tank 1, a first backwash water pipe 3 penetrating through the lower side wall of the slurry storage tank 1, and three longitudinally arranged second backwash water pipes 4 on the side wall of the slurry storage tank 1.
[0007] Inclined baffles 5, three of which are respectively located on one side of the inner wall of the slurry storage tank 1;
[0008] It also includes: a spiral slag lifter 6, of which three spiral slag lifters 6 are provided, one end of which penetrates through the side wall of one side of the slurry storage tank 1.
[0009] Furthermore, each of the three spiral slag lifters 6 is equipped with a drain pipe 7 at its lower left end.
[0010] Furthermore, each of the three spiral slag lifters 6 is provided with a slag discharge port 8 at its lower right end.
[0011] Furthermore, each of the slag discharge ports 8 is provided with a slag receiving trough 9 below it.
[0012] Furthermore, the slurry storage tank 1 is a container with an inclined angle.
[0013] Furthermore, the leftmost end of the spiral slag lifter 6 is provided with an opening 10.
[0014] The beneficial effects of this utility model are as follows:
[0015] This invention utilizes the different weight densities of various impurities. Under the backwashing and centrifugal force of the backwashing water, and by adjusting the water pressure and setting different centrifugal points, impurities of different specifications are backwashed and screened. After being removed by a spiral slag removal device, they undergo dewatering during the spiral transport process. This further completes the screening of clean slag, heavy slag, and pulp in the pulp, effectively improving the purity and quality of the pulp, thereby producing higher quality paper. Attached Figure Description
[0016] Figure 1 This is a front sectional view of the present invention, wherein... Figure 1 As shown in the abstract figure.
[0017] Figure 2 This is a front view schematic diagram of the present utility model.
[0018] Figure captions:
[0019] 1. Slurry storage tank; 2. Slurry feed pipe; 3. First backwash water pipe; 4. Second backwash water pipe; 5. Inclined baffle; 6. Screw conveyor; 7. Drain pipe; 8. Slag discharge port; 9. Slag receiving trough; 10. Opening. Detailed Implementation
[0020] The following is a specific embodiment of this utility model with reference to the accompanying drawings, and the structure of this utility model is described in detail. It should be noted that the scope of application of this utility model is not limited to the following embodiment; all similar structures based on this utility model are within the scope of application of this utility model.
[0021] One type of backwashing and screening device for slurry residue according to this utility model, such as... Figures 1-2 As shown, the screening device includes:
[0022] The slurry storage tank 1 has a slurry inlet pipe 2 installed along the inner wall at the upper opening of the slurry storage tank 1, through which the slurry enters the slurry storage tank 1. A first backwash water pipe 3 is installed through the lower side wall of the slurry storage tank 1, and three longitudinally arranged second backwash water pipes 4 are installed on the side wall of the slurry storage tank 1.
[0023] Inclined baffles 5, three of which are respectively located on one side of the inner wall of the slurry storage tank 1;
[0024] It also includes: a spiral slag lifter 6, of which three spiral slag lifters 6 are provided, one end of which penetrates through the side wall of one side of the slurry storage tank 1 and is located above the lower side of the inclined baffle 5.
[0025] As a further description of this embodiment, each of the three spiral slag lifters 6 is provided with a drain pipe 7 at its lower left end.
[0026] As a further description of this embodiment, each of the three spiral slag lifters 6 is provided with a slag discharge port 8 at its lower right end.
[0027] As a further description of this embodiment, each of the slag discharge ports 8 is provided with a slag receiving trough 9 below it.
[0028] As a further description of this embodiment, the slurry storage tank 1 is a container with an inclined angle.
[0029] As a further description of this embodiment, the leftmost end of the spiral slag lifter 6 is provided with an opening 10, through which the slurry enters the spiral slag lifter 6.
[0030] The working principle of this utility model is as follows:
[0031] The slurry enters the slurry storage tank 1 through the slurry feed pipe 2. Water is injected into the first backwash water pipe 3, and turbulence is formed under the action of the backwash water, mixing with the slurry entering from above. Water is injected into the second backwash water pipe 4, and centrifugal force is formed under the action of each inclined baffle 5, separating impurities in different states into light slag, slurry slag, and heavy slag. The three types of impurities are located at the three inclined baffles 5 from top to bottom. The impurities on each inclined baffle 5 are transported to the slag discharge port 8 by each screw slag lifter 6, and then enter each slag receiving tank 9. During the transportation process, water flows out through each drain pipe 7 and enters the water storage container.
[0032] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this invention.
Claims
1. A backwashing and screening device for slurry residue, characterized in that, The screening device includes: Slurry storage tank (1), with a slurry feed pipe (2) provided along the inner wall at the upper opening of the slurry storage tank (1), a first backwash water pipe (3) passing through the lower side wall of the slurry storage tank (1), and three longitudinally arranged second backwash water pipes (4) provided on the side wall of the slurry storage tank (1). Three inclined baffles (5) are provided and are respectively located on one side of the inner wall of the slurry storage tank (1); It also includes: a spiral slag lifter (6), of which three are provided, one end of which penetrates the side wall of the slurry storage tank (1).
2. The backwashing and screening device for slurry residue according to claim 1, characterized in that, All three spiral slag lifters (6) are equipped with a drain pipe (7) at the lower left end.
3. The backwashing and screening device for slurry residue according to claim 2, characterized in that, The three spiral slag lifters (6) are all equipped with slag discharge ports (8) at the lower right end.
4. The backwashing and screening device for slurry residue according to claim 3, characterized in that, Each of the slag discharge ports (8) is provided with a slag receiving trough (9) below it.
5. A backwashing and screening device for slurry residue according to claim 1, characterized in that, The slurry storage tank (1) is a container with an inclined angle.
6. A backwashing and screening device for slurry residue according to claim 4, characterized in that, The leftmost end of the spiral slag remover (6) is provided with an opening (10).