A heavy separation device applied to a wood pulp conveying pipeline

Abstract

The utility model discloses a heavy separation device for wood pulp conveying pipeline belongs to paper machine technical field, including wood pulp conveying pipe, the lower part of wood pulp conveying pipe is equipped with the first opening, is equipped with the collection bin of communicating wood pulp conveying pipe under the first opening, the lateral wall of collection bin is connected with the flush water pipeline, and flush water pipeline sets up in with the wood pulp conveying pipe's material direction opposite side. The device utilizes the specific gravity gap of heavy impurity and wood pulp, makes wood pulp material through the first opening and settles in the collection bin, and flush water pipeline and wood pulp conveying pipe medium form the effect of reverse flushing under the separation of heavy impurity and wood pulp, is helpful to the screening success rate promotion, saves the transformation cost simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of papermaking machine technology, specifically a heavy separation device applied to wood pulp conveying pipelines. Background Technology

[0002] The chemical pulping workshop in the paper industry is a crucial production area that uses wood pulp as raw material, processing it through a series of steps including transportation, screening, washing, and bleaching to ultimately produce qualified white pulp. This process aims to remove various impurities from the raw materials, such as heavy impurities like ferrous metals, stainless steel, and stones, to prevent damage to subsequent process equipment. If these impurities are not effectively removed, it will lead to increased wear and tear on equipment in screening and bleaching stages, higher operating loads, and increased vibration, severely impacting production stability and equipment lifespan.

[0003] Currently, the commonly used iron removal methods in the industry include a combination of mud tanks and magnetic rod adsorption. This method requires regular manual cleaning of the magnetic rods; otherwise, the iron removal effect decreases, affecting continuous production. Another common solution is the electromagnetic separator, which, although possessing a certain degree of automation, consumes a lot of energy and can only adsorb ferrous materials, being ineffective against stainless steel, stones, and non-metallic impurities, resulting in limited overall impurity removal efficiency. Furthermore, some companies have introduced advanced foreign equipment (such as Valmet heavy slag removal devices), which can remove more types of heavy impurities, but still suffer from low screening efficiency, failing to fundamentally solve the equipment wear and operational problems caused by impurities.

[0004] This shows that although there are equipment and methods for screening heavy impurities in the pretreatment stage of pulping raw materials, the screening rate is low and the cost is high. Utility Model Content

[0005] To address the issues of low success rate in screening heavy impurities and high equipment costs in the current pulp raw material pretreatment stage, this utility model provides a heavy separation device for wood pulp conveying pipelines that has a simple structure and can improve the screening success rate.

[0006] This utility model is achieved through the following technical solution: A heavy separation device for wood pulp conveying pipe includes a wood pulp conveying pipe, a first opening at the lower part of the wood pulp conveying pipe, and a collection chamber connected to the wood pulp conveying pipe below the first opening; a flushing water pipe is connected to the side wall of the collection chamber, and the flushing water pipe is located on the side opposite to the conveying direction of the wood pulp conveying pipe.

[0007] This device utilizes the difference in specific gravity between heavy impurities and wood pulp, allowing the wood pulp material to settle into the collection chamber through the first opening. The reverse flushing action between the flushing water pipe and the medium in the wood pulp conveying pipe completes the separation of heavy impurities and wood pulp, which helps to improve the screening success rate and saves on modification costs.

[0008] A further improvement of this invention is that the top of the collection chamber is provided with a second opening, which corresponds to the first opening. This vertical alignment of the second and first openings helps to facilitate the smooth entry of heavy impurities into the collection chamber under the influence of gravity.

[0009] A further improvement of this invention is that the size of the second opening is not smaller than the size of the first opening. Under the impact of the flushing water pipe, the material tumbles in the collection chamber, and the size of the second opening helps the material to quickly flow into the collection chamber.

[0010] A further improvement of this invention is that the aforementioned flushing water pipes are provided with two pipes. By using two flushing water pipes, a higher flushing pressure is ensured, thereby increasing the impact range on the materials within the collection chamber.

[0011] A further improvement of this invention is that the two rinsing water pipes are arranged on the same horizontal plane, and symmetrically with respect to the conveying direction of the wood pulp conveying pipe. This symmetrical arrangement of the two rinsing water pipes optimizes the angle layout, improving the success rate of separating heavy impurities from the wood pulp.

[0012] A further improvement of this invention is that a third opening is provided on the side wall of the collection chamber, and a sealing blind plate is provided at the third opening. By opening the sealing blind plate, heavy impurities inside can be cleaned outwards through the third opening to create processing space.

[0013] A further improvement of this utility model is that an outwardly extending flange pipe is connected to the third opening, and the sealing blind plate is installed on the flange pipe by fasteners.

[0014] A further improvement of this invention is that the outer wall of the collection chamber is provided with reinforcing ribs. These reinforcing ribs enhance the structural strength of the collection chamber.

[0015] A further improvement of this invention is that a valve is provided on the aforementioned flushing water pipe. By controlling the valve, the precise control of the flushing water flow can be improved, thus optimizing the flushing efficiency.

[0016] As can be seen from the above technical solution, the beneficial effects of this utility model are: This device utilizes the difference in specific gravity between heavy impurities and wood pulp, allowing the wood pulp material to settle into the collection chamber through the first opening. Under the reverse flushing action of the flushing water pipe and the medium in the wood pulp conveying pipe, the heavy impurities and wood pulp are separated, which helps to improve the screening success rate and saves modification costs. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram illustrating the working principle of a specific embodiment of the present invention.

[0020] In the attached diagram: 1. Pulp delivery pipe; 2. Sealing blind flange; 3. External wall reinforcing rib; 4. Collection bin; 5. Flushing water pipe; 6. Valve; 101. First opening; 201. Fastener; 401. Second opening; 402. Third opening; 403. Flange pipe. Detailed Implementation

[0021] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0022] like Figures 1-2 As shown, this utility model discloses a heavy separation device applied to a wood pulp conveying pipe 1, including a wood pulp conveying pipe 1, a first opening 101 is provided at the lower part of the wood pulp conveying pipe 1, and a collection chamber 4 connected to the wood pulp conveying pipe 1 is provided below the first opening 101; a flushing water pipe 5 is connected to the side wall of the collection chamber 4, and the flushing water pipe 5 is located on the side opposite to the conveying direction of the wood pulp conveying pipe 1.

[0023] This device utilizes the difference in specific gravity between heavy impurities and wood pulp, allowing the wood pulp material to settle into the collection chamber 4 through the first opening 101. The reverse flushing action between the flushing water pipe 5 and the medium in the wood pulp conveying pipe 1 further improves the separation efficiency of heavy impurities and wood pulp. At the same time, it makes room for the subsequent settling of impurities, preventing heavy impurities from being unable to enter the collection chamber due to pulp accumulation, which helps to improve the screening success rate and saves modification costs.

[0024] The collection chamber 4 is sealed to the pulp conveying pipe 1 to prevent leakage under high flow rate and pressure.

[0025] Specifically, two or more first openings 101 can be made along the axial direction of the wood pulp conveying pipe 1, and a collection chamber 4 is set at each first opening 101. The number of first openings 101 is set so as not to affect the turbulence formed when the wood pulp material flows in the wood pulp conveying pipe 1, which helps to further improve the removal rate of heavy impurities mixed in the wood pulp material in the wood pulp conveying pipe 1. Moreover, the screening of heavy impurities can be carried out at a low flow rate of the medium in the wood pulp conveying pipe 1.

[0026] The top of the collection chamber 4 is provided with a second opening 401, which corresponds to the first opening 101. The vertical alignment of the second opening 401 with the first opening 101 helps to facilitate the smooth entry of heavy impurities into the collection chamber 4 under the action of gravity.

[0027] The size of the second opening 401 is not smaller than the size of the first opening 101. Under the impact of the flushing water pipe 5, the material tumbles in the collection chamber 4. The size setting of the second opening 401 helps the material to quickly flow into the collection chamber 4.

[0028] Two flushing water pipes 5 are provided. By using two flushing water pipes 5, the impact range on the materials in the collection bin 4 is increased while ensuring a high flushing pressure.

[0029] The two flushing water pipes 5 are arranged on the same horizontal plane, and are symmetrically arranged with respect to the conveying direction of the wood pulp conveying pipe 1. The symmetrical arrangement of the two flushing water pipes 5 optimizes the angle layout, improving the success rate of separating heavy impurities from wood pulp.

[0030] A third opening 402 is provided on the side wall of the collection chamber 4, and a sealing blind plate 2 is provided at the third opening 402. By opening the sealing blind plate 2, heavy impurities inside can be cleaned outward from the third opening 402 to clear processing space.

[0031] A flange pipe 403 extending outward is connected to the third opening 402, and the sealing blind plate 2 is installed on the flange pipe 403 by fasteners 201.

[0032] The outer wall of the collection chamber 4 is provided with outer wall reinforcing ribs 3. The outer wall reinforcing ribs 3 improve the structural strength of the collection chamber 4.

[0033] The flushing water pipe 5 is equipped with a valve 6. By controlling the valve 6, the precise control of the flushing water flow can be improved, and the flushing efficiency can be optimized.

[0034] In summary, the working principle of this device is based on a physical separation principle combining gravity settling and hydraulic flushing. The wood pulp flows at a low velocity within the wood pulp delivery pipe 1. Heavy impurities such as ferrous metals, stainless steel, and stones, whose density is much greater than that of wood pulp fibers and water, will naturally detach from the main flow and settle downwards under the influence of gravity when passing through the first opening 101 at the bottom of the wood pulp delivery pipe 1. The collection chamber 4 provides a low-velocity settling space, allowing impurities to be captured and temporarily stored. The flushing water pipe 5, located on the side wall of the collection bin 4 and opposite to the conveying direction, allows for the introduction of low-pressure flushing water. This prevents heavy impurities and useful wood pulp from being sent to the next process simultaneously. The low-pressure flushing water generates a water flow in the opposite direction to the wood pulp conveying direction, effectively agitating and flushing the bottom of the collection bin 4. This separates heavy impurities from useful wood pulp fibers. Due to the difference in specific gravity, the heavy impurities fall into the collection bin 4, while the wood pulp fibers are flushed out of the collection bin 4 and return to the main flow of the wood pulp conveying pipe 1 to enter the next process. This achieves continuous or intermittent efficient separation of heavy impurities in the wood pulp.

[0035] This device can separate most of the heavy impurities from the wood pulp fibers. The remaining heavy impurities will be further removed by the next process of impurity removal equipment. This device is equivalent to reducing the workload of the subsequent impurity removal equipment.

[0036] In summary, the workflow of this device is as follows: Separation and Settling Stage: Under pumping pressure or elevation difference, the wood pulp flows continuously forward along the wood pulp delivery pipe 1. When the pulp flows through the first opening 101 at the bottom of the wood pulp delivery pipe 1, heavy impurities in the pulp flow quickly settle under gravity, falling into the collection bin 4 below through the first opening 101 and the corresponding second opening 401 at the top of the collection bin 4. The lighter wood pulp fibers continue to move forward with the mainstream and enter the next process, thus achieving the initial separation of heavy impurities from the wood pulp.

[0037] Aggregation and Temporary Storage Stage: The separated heavy impurities gradually accumulate and deposit at the bottom of collection chamber 4. During this stage, collection chamber 4 serves as a temporary storage container for impurities and does not affect the continuous operation of the main process in wood pulp conveying pipe 1.

[0038] Slag discharge stage: This is an intermittent operation process. After the equipment has been running for a period of time, the operator will empty the pulp in the pulp conveying pipe 1. The flushing water will continuously flush out most of the useful wood pulp fiber material in the collection bin 4. A small amount of wood pulp fiber material and heavy impurities with a high specific gravity will remain in the collection bin 4. At this time, the operator will close the valve 6 on the flushing water pipe 5, open the blind flange 2, and manually discharge the heavy impurities from the system.

[0039] During this process, since the collection chamber 4 contains liquid media, and considering the safety risks that the high liquid pressure would pose to the site when the sealing blind flange 2 is opened, some fasteners 201 can be removed first when removing the sealing blind flange 2, so that the sealing blind flange 2 forms a small opening to allow the liquid media in the collection chamber 4 to be discharged outward, thus avoiding the danger of liquid pressure impact.

[0040] Recovery and Circulation Phase: After slag discharge, reinstall and seal the blind flange 2, open the flushing water valve 6, and restore the flow of wood pulp material in the wood pulp delivery pipe 1. The unit immediately resumes normal heavy impurity separation and sedimentation functions and begins the next working cycle.

[0041] The present invention relates to a heavy material separation device for wood pulp conveying pipes. This device utilizes the difference in specific gravity between heavy impurities and wood pulp, allowing the wood pulp material to settle into the collection chamber through the first opening. The separation of heavy impurities and wood pulp is achieved through the reverse flushing action of the flushing water pipe and the medium inside the wood pulp conveying pipe, which helps to improve the screening success rate and saves modification costs.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heavy separation device applied to a wood pulp conveying pipe, comprising a wood pulp conveying pipe (1), characterized in that, The lower part of the wood pulp conveying pipe (1) has a first opening (101), and a collection chamber (4) connected to the wood pulp conveying pipe (1) is provided below the first opening (101); a flushing water pipe (5) is connected to the side wall of the collection chamber (4), and the flushing water pipe (5) is located on the side opposite to the conveying direction of the wood pulp conveying pipe (1).

2. A heavy separation device for use in a wood pulp delivery conduit according to claim 1, characterized in that, The top of the collection chamber (4) is provided with a second opening (401), which corresponds to the first opening (101).

3. A heavy separation device for use in a wood pulp delivery conduit according to claim 2, characterized in that The size of the second opening (401) is not smaller than the size of the first opening (101).

4. A heavy separation device for wood pulp conveying pipelines according to any one of claims 1 to 3, characterized in that, The flushing water pipe (5) has two pipes.

5. A heavy separation device for wood pulp conveying pipelines according to claim 4, characterized in that, The two flushing water pipes (5) are set on the same horizontal plane, and the two flushing water pipes (5) are symmetrically arranged with respect to the material conveying direction of the wood pulp conveying pipe (1).

6. A heavy separation device for wood pulp conveying pipelines according to any one of claims 1 to 3, characterized in that, A third opening (402) is provided on the side wall of the collection chamber (4), and a blind plate (2) is provided at the third opening (402).

7. A heavy separation device for wood pulp conveying pipelines according to claim 6, characterized in that, A flange pipe (403) extending outward is connected to the third opening (402), and the sealing blind plate (2) is installed on the flange pipe (403) by fasteners (201).

8. A heavy separation device for wood pulp conveying pipelines according to any one of claims 1 to 3, characterized in that, The outer wall of the collection chamber (4) is provided with outer wall reinforcing ribs (3).

9. A heavy separation device for wood pulp conveying pipelines according to any one of claims 1 to 3, characterized in that, A valve (6) is provided on the flushing water pipe (5).

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