A device for removing sludge from a paper machine
By installing a combination of spiral guide vanes and hydrocyclones on the paper machine, and combining centrifugal force and cyclone separation principles, the efficient separation of large and small impurities in the pulp is achieved. This solves the problem that existing devices are unable to remove light impurities, and improves paper quality and production efficiency.
Patent Information
- Application Number
- CN202522419464.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-14
AI Technical Summary
Existing papermaking machines have difficulty effectively removing lightweight impurities in pulp with densities close to those of fibers, leading to a decline in the quality of finished paper products.
It adopts a combination structure of spiral guide vanes and hydrocyclones, combining centrifugal force and cyclone separation principle to perform two separations: the first screening separates large particles of impurities, and the second separation separates light impurities. High-pressure airflow is used to prevent clogging.
It significantly improves the purity of pulp, ensures the quality of finished paper, prevents damage to wire mesh equipment, and increases production efficiency.
Smart Images
Figure CN224942936U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of papermaking equipment technology, and in particular to a slag removal device installed on a papermaking machine. Background Technology
[0002] During the papermaking process, before the pulp flows to the wire section for forming, it may contain various heavy and light impurities such as sand, metal shavings, and plastic fragments. If these impurities are not removed, they will directly lead to holes and defects in the finished paper, and may even damage the expensive forming wire, reducing product quality and production efficiency.
[0003] Most existing slag removal devices use cone-shaped slag removers and rely solely on centrifugal filtration. While this method can remove large particles from the pulp for papermaking, it is ineffective at separating impurities with a density similar to that of the pulp fibers, leading to a decline in the quality of the finished paper. Utility Model Content
[0004] The purpose of this application is to provide a slag removal device installed on a paper machine, which aims to solve the problems in the prior art.
[0005] This application provides a slag removal device installed on a paper machine, including an outer sleeve, a spiral guide vane, and a hydrocyclone. The outer sleeve has a vertical discharge pipe in the middle, and the spiral guide vane is fixedly installed outside the vertical discharge pipe. The outer sleeve has a feed inlet, and the inner end of the feed inlet is located at the top of the spiral guide vane. The hydrocyclone is located at the bottom of the vertical discharge pipe and has a side feed inlet, a top outlet, and a bottom slag outlet. The top outlet of the hydrocyclone is connected to the vertical discharge pipe, and the side feed inlet is connected to the tail of the spiral guide vane through a connecting pipe. The bottom of the outer sleeve has a conical discharge outlet, and the bottom slag outlet of the hydrocyclone is connected to the conical discharge outlet. The inner wall of the conical discharge outlet has an annular anti-clogging ring, and the bottom of the annular anti-clogging ring has multiple air jets, each of which is connected to an air supply pipe.
[0006] Furthermore, the feed inlet extends obliquely from the side of the outer sleeve into the inside of the sleeve.
[0007] Furthermore, the pitch of the spiral guide vane gradually decreases from top to bottom.
[0008] Furthermore, the hydrocyclone is mounted inside the outer sleeve via a mounting bracket, and a booster pump is provided on the connecting pipe.
[0009] Furthermore, a buffer slope is provided between the top surface of the annular anti-blocking ring and the inner wall of the conical discharge port.
[0010] Furthermore, the annular anti-blocking ring has a hollow cavity inside, the gas delivery pipe is located inside the hollow cavity, and the gas delivery pipe is connected to an external high-pressure gas pump.
[0011] The beneficial effects of this invention are as follows: after the pulp enters the spiral guide plate, large particles of sand, metal shavings, plastic fragments and other impurities in the pulp are initially screened under the action of centrifugal force. The remaining pulp is then sent to the hydrocyclone along the connecting pipe. The hydrocyclone is used to separate lightweight impurities with a density close to that of fibers in a secondary process. The two separations can remove impurities from the pulp to the greatest extent possible, ensuring the quality of the final paper product. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0013] Figure 2 This is a schematic diagram of a ring-shaped anti-clogging ring structure.
[0014] In the picture: 1. Outer sleeve; 11. Feed inlet; 2. Vertical discharge pipe; 23. Spiral guide vane; 3. Hydrocyclone; 31. Fixing frame; 32. Bottom slag outlet; 33. Connecting pipe; 331. Booster pump; 34. Top outlet; 4. Conical discharge port; 42. Annular anti-clogging ring; 421. Air jet. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] like Figure 1 and Figure 2 The illustrated slag removal device installed on a paper machine includes an outer sleeve 1, a spiral guide vane 23, and a hydrocyclone 3. The outer sleeve 1 has a vertical discharge pipe 2 in the middle. The spiral guide vane 23 is fixedly installed outside the vertical discharge pipe 2. The outer sleeve 1 has a feed inlet 11, the inner end of which is located at the top of the spiral guide vane 23. The hydrocyclone 3 is located at the bottom of the vertical discharge pipe 2 and has a side feed inlet, a top outlet 34, and a bottom slag outlet. 32. The top outlet 34 of the hydrocyclone 3 is connected to the vertical discharge pipe 3. The side inlet is connected to the tail of the spiral guide vane 23 through the connecting pipe 33. The bottom of the outer sleeve 1 is provided with a conical discharge port 4. The bottom slag outlet 32 of the hydrocyclone 3 is connected to the conical discharge port 4. The inner wall of the conical discharge port 4 is provided with an annular anti-blocking ring 42. The bottom of the annular anti-blocking ring 42 is provided with multiple air jets 421. Each air jet 4212 is connected to the gas delivery pipe.
[0017] The hydrocyclone 4 is essentially embedded inside the outer sleeve 1, and there is a flow cavity between the hydrocyclone 4 and the outer sleeve 1. The pulp enters the outer sleeve 1 under high pressure from the feed port 11. The pulp rotates at high speed under the action of the spiral guide vane 23. Large particles of sand, metal shavings, plastic fragments and other impurities in the pulp are initially screened under the action of centrifugal force. The remaining pulp enters the hydrocyclone 3 along the connecting pipe 33. The screening principle of the hydrocyclone 3 is used to perform secondary separation of light impurities with a density close to that of fibers. The pulp after fine filtration is discharged through the top outlet 34 of the hydrocyclone and discharged vertically upward along the vertical discharge port. The light impurities flow from the bottom slag outlet 32 to the conical discharge port 4 and are discharged together with the impurities screened in the first screening.
[0018] The feed inlet 11 extends obliquely from the side of the outer sleeve 1 into the inner sleeve, so that the pulp is fed obliquely into the outer sleeve 1 from the feed inlet 11, and the pulp is rotated along the spiral guide plate 23 to use centrifugal force to filter out large particles of impurities.
[0019] The pitch of the spiral guide vane 23 gradually decreases from top to bottom, which can accelerate the swirling flow and improve the separation effect.
[0020] The hydrocyclone 3 is installed inside the outer sleeve 1 by a fixing frame 31, and a booster pump 331 is provided on the connecting pipe 33 to pressurize the pulp entering the hydrocyclone 3.
[0021] A buffer slope is provided between the top surface of the annular anti-blocking ring 42 and the inner wall of the conical discharge port 4 to prevent waste residue from being stuck on the upper surface of the annular anti-blocking ring and to facilitate the discharge of waste residue.
[0022] The annular anti-blocking ring 42 has a hollow cavity inside, and the air supply pipe is located inside the hollow cavity. The air supply pipe is connected to an external high-pressure air pump. High-pressure air is injected into the air supply pipe by the high-pressure air pump, and the high-pressure airflow is ejected from the jet nozzle. The ejected high-pressure airflow can effectively prevent blockage.
[0023] The above embodiments are not intended to limit the present invention. Unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention is not limited to the examples above. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention. Furthermore, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.
[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A slag removal device installed on a papermaking machine, characterized in that, The device includes an outer sleeve, a spiral guide vane, and a hydrocyclone. The outer sleeve has a vertical discharge pipe in the middle. The spiral guide vane is fixedly installed outside the vertical discharge pipe. The outer sleeve has a feed inlet, the inner end of which is located at the top of the spiral guide vane. The hydrocyclone is located at the bottom of the vertical discharge pipe and has a side feed inlet, a top outlet, and a bottom slag outlet. The top outlet of the hydrocyclone is connected to the vertical discharge pipe. The side feed inlet is connected to the tail of the spiral guide vane via a connecting pipe. The bottom of the outer sleeve has a conical discharge port, and the bottom slag outlet of the hydrocyclone is connected to the conical discharge port. The inner wall of the conical discharge port has an annular anti-clogging ring, and the bottom of the annular anti-clogging ring has multiple air jets, each of which is connected to an air supply pipe.
2. The slag removal device installed on a papermaking machine according to claim 1, characterized in that, The feed inlet extends obliquely from the side of the outer sleeve into the inside of the sleeve.
3. The slag removal device installed on a papermaking machine according to claim 1, characterized in that, The pitch of the spiral guide vane gradually decreases from top to bottom.
4. The slag removal device installed on a papermaking machine according to claim 1, characterized in that, The hydrocyclone is mounted inside the outer sleeve via a mounting bracket, and a booster pump is provided on the connecting pipe.
5. The slag removal device installed on a papermaking machine according to claim 1, characterized in that, A buffer ramp is provided between the top surface of the annular anti-blocking ring and the inner wall of the conical discharge port.
6. The slag removal device installed on a paper machine according to claim 5, characterized in that, The annular anti-blocking ring has a hollow cavity inside, and the gas delivery pipe is located inside the hollow cavity. The gas delivery pipe is connected to an external high-pressure gas pump.