Iron removal system for paper production

Abstract

The utility model provides a kind of for paper preparation's deironing system, including at least two deironing units of parallelly connected arrangement, each deironing unit includes a deironing device and the pipeline of being arranged in deironing device upstream, downstream, the deironing device includes the import pipe, front transition pipe, deironing main pipe and export pipe of sequentially arranged, wherein, the deironing main pipe includes main space, and several deironing components are arranged in the main space, and the deironing component includes the adsorption cylinder of length direction parallel to deironing main pipe axis and with a cavity and the magnet that optionally forms magnetized area in cavity, the pipe diameter of the deironing main pipe is greater than the pipe diameter of import pipe, and the pipe diameter of front transition pipe gradually increases from the one end of import pipe to the one end of deironing main pipe, can realize efficient adsorption to iron-containing impurities and fast and efficient cleaning of the iron-containing impurities on the surface of adsorption cylinder.

Description

Technical Field

[0001] This utility model relates to an iron removal system for paper preparation. Background Technology

[0002] In the papermaking process, iron removal devices or systems are usually required to remove iron filings or iron-containing impurities from the pulp. For example, document CN110354991A shows an iron removal device, which has an adsorption cylinder arranged vertically in the pulp flow channel and a magnet inside the adsorption cylinder. The magnet can be selectively magnetized to adsorb or remove iron-containing impurities in the pulp. However, in practice, it has been found that due to its arrangement, the adsorption cylinder has a large resistance in the flow channel. At the same time, the adsorption cylinder can form a better adsorption effect on the side facing the pulp inlet, while the adsorption effect is poor on the side away from the pulp inlet, that is, only one side can form a good adsorption effect. In addition, because the pulp flow rate is faster on the side facing the pulp, the iron-containing impurities adsorbed on the surface of the adsorption cylinder are easily detached, making the overall adsorption effect of the iron removal device not very good and requiring frequent cleaning.

[0003] Therefore, a new technical solution is needed to address the aforementioned technical problems. Utility Model Content

[0004] Therefore, this invention provides an iron removal system for paper preparation to solve the above-mentioned technical problems.

[0005] An iron removal system for paper preparation includes at least two iron removal units arranged in parallel. Each iron removal unit includes an iron removal device and pipes arranged upstream and downstream of the iron removal device. The iron removal device includes an inlet pipe, a front transition pipe, an iron removal main pipe, and an outlet pipe arranged sequentially. The iron removal main pipe includes a main space, in which a plurality of iron removal components are arranged. Each iron removal component includes an adsorption cylinder with a cavity having a length direction parallel to the axis of the iron removal main pipe and a magnet that can selectively form a magnetization zone in the cavity. The diameter of the iron removal main pipe is larger than the diameter of the inlet pipe, and the diameter of the front transition pipe gradually increases from the inlet pipe end to the iron removal main pipe end.

[0006] The magnet is a permanent magnet that is movably arranged relative to the adsorption cylinder and can be moved into or out of the adsorption cylinder. When it is moved into the adsorption cylinder, it forms a magnetized area in the cavity, and when it is moved out of the adsorption cylinder, it does not form a magnetized area in the cavity.

[0007] The iron removal assembly also includes a driving device, which is used to drive a magnet to move into or out of the adsorption cylinder. The magnet is a long rod-shaped magnet. The driving device is configured to drive the magnet to move along the axis of the iron removal main pipe, so that the magnet can be movably inserted into or removed from the adsorption cylinder along the axis of the iron removal main pipe.

[0008] The magnet is a soft magnet that can be magnetized or demagnetized, and a magnetization region is selectively generated in a controlled manner. When the magnet is magnetized, a magnetization region is formed in the cavity, and when it is demagnetized, no magnetization region is formed in the cavity.

[0009] The iron removal components are of several kinds, and the iron removal components are arranged in a circumferential array along the main axis of the iron removal tube in the circumferential direction of the adsorption cylinder.

[0010] The inlet pipe includes a first inner wall surface, the main iron removal pipe includes a second inner wall surface, the first inner wall surface includes a virtual inner wall surface extending in the direction of the main iron removal pipe, the main space includes an annular space located between the virtual inner wall surface and the second inner wall surface, and the iron removal assembly is disposed in the annular space.

[0011] The iron removal main pipe and the outlet pipe are provided with a rear transition pipe. The rear transition pipe includes a pipe wall with a through hole. The adsorption cylinder is configured to be inserted into the through hole and can be moved into or out of the through hole.

[0012] A scraper is provided inside the through hole, which abuts against the outer wall of the adsorption cylinder.

[0013] The adsorption cylinder includes a cylinder and a cone, with the cone facing the inlet pipe.

[0014] The iron removal assembly also includes a nozzle located in front of the cone and a white water pipe connected to the nozzle. The nozzle is configured to spray white water toward the adsorption cylinder.

[0015] Beneficial Effects: This utility model provides an iron removal system for paper preparation, comprising at least two iron removal units arranged in parallel. Each iron removal unit includes an iron removal device and pipes arranged upstream and downstream of the iron removal device. The iron removal device includes an inlet pipe, a front transition pipe, an iron removal main pipe, and an outlet pipe arranged sequentially. The iron removal main pipe includes a main space, in which several iron removal components are arranged. Each iron removal component includes an adsorption cylinder with a cavity parallel to the axis of the iron removal main pipe in its length direction and a magnet that can selectively form a magnetization zone in the cavity. The diameter of the iron removal main pipe is larger than that of the inlet pipe, and the diameter of the front transition pipe gradually increases from one end of the inlet pipe to the other end of the iron removal main pipe. This system can efficiently adsorb iron-containing impurities and quickly and efficiently clean iron-containing impurities from the surface of the adsorption cylinder. Attached Figure Description

[0016] Figure 1 Schematic diagram of the iron removal system according to an embodiment of this utility model; Figure 2 for Figure 1 A three-dimensional schematic diagram of the iron removal device in the diagram; Figure 3 for Figure 2 Schematic diagram of the iron removal device AA (cross-section); Component descriptions in the diagram: First iron removal unit 10; First pipe 11; First valve 111; Iron removal device 12; Inlet pipe 121; First inner wall surface 1211; Virtual inner wall surface 1212; Front transition pipe 122; Iron removal main pipe 123; Main space 1230; Annular space 1231; Second inner wall surface 1232; Rear transition pipe 124; Outlet pipe 125; Adsorption cylinder 126; Cavity 1260; Cylinder 1261; Cone 1262; Magnet 127; White water pipe 13; Nozzle 131; Second pipe 14; Second valve 141; Third pipe 15; Third valve 151; Second iron removal unit 20. Detailed Implementation

[0017] This utility model provides an iron removal system for paper preparation, used to remove iron-containing impurities from pulp, especially when applied downstream of a pulper to prevent iron-containing impurities from being carried into the paper surface and causing poor paper surface quality. Of course, it can also be applied to other scenarios where iron-containing impurities need to be removed.

[0018] Please refer to Figure 1The iron removal system includes at least two iron removal units arranged in parallel. Each iron removal unit includes an iron removal device 12 and pipes arranged upstream and downstream of the iron removal device 12. Specifically, in this embodiment, there are two iron removal units, namely a first iron removal unit 10 and a second iron removal unit 20. The arrangement of the second iron removal unit 20 is the same as that of the first iron removal unit 10. Therefore, only the first iron removal unit 10 will be described in detail in the following description, and the second iron removal unit 20 will not be described again.

[0019] The first iron removal unit 10 includes an iron removal device 12, a first pipe 11 upstream of the iron removal device 12, and a second pipe 14 and a third pipe 15 downstream of the iron removal device 12. The second pipe 14 and the third pipe 15 are connected in parallel. It is understood that a slurry supply device, specifically a slurry spreader, is also provided upstream of the first pipe 11. The slurry collection device, specifically a slurry tank, or further, a slurry spreader, is also provided downstream of the second pipe 14. A waste slurry tank is provided downstream of the third pipe 15 for collecting iron-containing impurities.

[0020] The first pipe 11 is provided with a first valve 111, the second pipe 14 is provided with a second valve 141, and the third pipe 15 is provided with a third valve 151. By opening and closing the second valve 141 and the third valve 151, the iron removal device 12 can be selectively connected to the downstream of the second pipe 14 or the third pipe 15 to transport the pulp with iron impurities removed to the pulp collection device or waste pulp tank.

[0021] Please refer to this as well. Figure 2 and Figure 3 The iron removal device 12 includes an inlet pipe 121, a transition pipe, an iron removal main pipe 123, and an outlet pipe 125 arranged sequentially. The inlet pipe 121 is configured to connect to the first pipe 11 to transport pulp into the iron removal main pipe 123. The outlet pipe 125 is configured to connect to the second pipe 14 and the third pipe 15. The diameter of the iron removal main pipe 123 is larger than the diameter of the inlet pipe 121, and the diameter of the front transition pipe 122 gradually increases from one end of the inlet pipe 121 to the other end of the iron removal main pipe 123, making the front transition pipe 122 funnel-shaped. According to Bernoulli's principle, when the pulp flows from the first pipe 11 through the front transition pipe 122 into the iron removal main pipe 123, its flow velocity will decrease, thereby facilitating the iron removal components to remove iron from the pulp in the iron removal main pipe 123.

[0022] The main iron removal pipe 123 includes a main space 1230, in which a plurality of iron removal components are provided. Each iron removal component includes an adsorption cylinder 126 with a cavity 1260 and a length direction parallel to the axis of the main iron removal pipe 123, and a magnet 127 that can optionally form a magnetization zone within the cavity 1260. It is understood that when the magnet 127 forms a magnetization zone within the cavity 1260, iron-containing impurities in the pulp entering the cavity 1260 through the inlet pipe 121 can be adsorbed onto the outer surface of the adsorption cylinder 126; when the magnet 127 does not form a magnetization zone within the cavity 1260, the iron-containing impurities adsorbed onto the outer surface of the adsorption cylinder 126 can fall off the adsorption cylinder 126.

[0023] Specifically, the magnet 127 is movably disposed relative to the adsorption cylinder 126 and can be moved into or out of the adsorption cylinder 126, thereby selectively forming a magnetization zone within the cavity 1260, or the magnet 127 is fixedly installed within the adsorption cylinder 126 and selectively generates a magnetization zone in a controlled manner.

[0024] Optionally, in one embodiment, the magnet 127 is a permanent magnet (e.g., a magnet) that is movably disposed relative to the adsorption cylinder 126 and can be moved into or out of the adsorption cylinder 126. When it is moved into the adsorption cylinder 126, it forms a magnetized area in the cavity 1260, and when it is moved out of the adsorption cylinder 126, it does not form a magnetized area in the cavity 1260.

[0025] Specifically, the iron removal assembly also includes a drive device (not shown), which drives the magnet 127 to move into or out of the adsorption cylinder 126. More specifically, the drive device is a telescopic device, including a fixed end and a movable end, the movable end being movable to move away from or towards the fixed end. The magnet 127 is connected to the movable end of the drive device; when the movable end moves, it drives the magnet 127 to move. The drive device can be one of a cylinder, hydraulic cylinder, electric cylinder, or linear motor. More specifically, the magnet 127 is a long rod-shaped magnet, and the driving device is configured to drive the magnet to move along the axis of the iron removal main pipe 123, so that the magnet 127 can be movably inserted into or removed from the adsorption cylinder 126 along the axis of the iron removal main pipe 123.

[0026] Optionally, in another embodiment, the magnet 127 is a soft magnet capable of being magnetized or demagnetized, selectively generating a magnetization region in a controlled manner. That is, when the magnet 127 is magnetized, a magnetization region is formed within the cavity 1260; when demagnetized, no magnetization region is formed within the cavity 1260. For example, the magnet 127 is an electromagnet; when energized, the magnet 127 is magnetized to form a magnetization region, while when demagnetized, the magnet 127 is demagnetized and no magnetization region is formed. In this case, the magnet 127 is fixedly disposed relative to the adsorption cylinder 126 and does not need to be moved in or out; the formation of a magnetization region can be controlled simply by controlling whether or not energized.

[0027] Understandably, in this embodiment, the adsorption cylinder 126 is positioned in the same direction as the pulp flow direction, which makes the entire adsorption cylinder 126 have low resistance to the flow of the pulp, and at the same time, the entire adsorption cylinder 126 can produce an adsorption effect.

[0028] Furthermore, the adsorption cylinder 126 should be made of a non-magnetizable material so that when the magnet 127 does not form a magnetized area, the adsorption cylinder 126 itself does not generate a magnetized area, thereby facilitating the easy removal of iron-containing impurities from the outer wall of the adsorption cylinder 126.

[0029] Furthermore, there are several iron removal components, and these iron removal components are arranged in a circumferential array along the axis of the iron removal main pipe 123 in the circumferential direction of the adsorption cylinder 126.

[0030] Furthermore, the inlet pipe 121 includes a first inner wall surface 1211, and the iron removal main pipe 123 includes a second inner wall surface 1232. It can be understood that the main space 1230 is the area defined by the second inner wall surface 1232. The first inner wall surface 1211 includes a virtual inner wall surface 1212 extending in the direction of the iron removal main pipe 123. The main space 1230 includes an annular space 1231 located between the virtual inner wall surface 1212 and the second inner wall surface 1232. The iron removal assembly is disposed within the annular space 1231.

[0031] Furthermore, a rear transition pipe 124 is provided between the iron removal main pipe 123 and the outlet pipe 125. The rear transition pipe 124 includes a pipe wall with a through hole. The adsorption cylinder 126 is configured to be inserted into the through hole and can be moved out of the through hole. A scraper is provided on the inner side of the through hole to abut against the outer wall of the adsorption cylinder 126. When the adsorption cylinder 126 is moved out of the through hole, the scraper scrapes off the iron-containing impurities adsorbed or adhered to the outer wall of the adsorption cylinder 126, thereby quickly removing the iron-containing impurities from the outer wall of the adsorption cylinder 126 and allowing the outer wall of the adsorption cylinder 126 to adsorb or adhere iron-containing impurities again.

[0032] Furthermore, the adsorption cylinder 126 includes a cylinder body 1261 and a conical body 1262, with the conical body 1262 facing the inlet pipe 121 to further reduce the resistance when the pulp flows.

[0033] Furthermore, the iron removal assembly also includes a nozzle 131 located in front of the cone 1262 and a white water pipe 13 connected to the nozzle 131. The nozzle 131 is configured to spray white water toward the adsorption cylinder 126, thereby flushing the iron-containing impurities on the outer wall of the adsorption cylinder 126 with the white water, causing the iron-containing impurities to fall off from the outer wall of the adsorption cylinder 126.

[0034] Understandably, the iron removal system of this embodiment can quickly adsorb iron-containing impurities in pulp by means of the following method: when it is necessary to adsorb iron-containing impurities in pulp, the first valve 111 is opened, and the magnet 127 forms a magnetized zone in the cavity 1260 of the adsorption cylinder 126 to adsorb iron-containing impurities in pulp. In addition, in this state, the second valve 141 is opened so that the pulp with iron-containing impurities removed can flow smoothly downstream. When it is necessary to clean the surface of the adsorption cylinder 126, the magnet 127 no longer forms a magnetized zone, so that the iron-containing impurities on the surface of the adsorption cylinder 126 fall off. In this state, the second valve 141 should be closed and the third valve 151 should be opened to transport the pulp with high iron content to the waste pulp tank.

[0035] Furthermore, when cleaning is required, white water can be sprayed onto the adsorption cylinder 126 through the nozzle 131 to help clean the surface of the adsorption cylinder 126.

[0036] Furthermore, the first valve 111 can be further closed to allow the nozzle 131 to better clean the surface of the adsorption cylinder 126, or even further, the adsorption cylinder 126 can be moved out of the through hole and the iron-containing impurities can be scraped off by the scraper set at the through hole.

[0037] The above method enables efficient adsorption of iron-containing impurities and rapid and efficient cleaning of iron-containing impurities on the surface of the adsorption cylinder 126.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An iron removal system for paper production, characterized in that, The device includes at least two iron removal units arranged in parallel. Each iron removal unit includes an iron removal device and pipes arranged upstream and downstream of the iron removal device. The iron removal device includes an inlet pipe, a front transition pipe, an iron removal main pipe, and an outlet pipe arranged in sequence. The iron removal main pipe includes a main space, in which several iron removal components are arranged. Each iron removal component includes an adsorption cylinder with a cavity that is parallel to the axis of the iron removal main pipe in the length direction, and a magnet that can optionally form a magnetization zone in the cavity. The diameter of the iron removal main pipe is larger than the diameter of the inlet pipe, and the diameter of the front transition pipe gradually increases from the inlet pipe end to the iron removal main pipe end.

2. The iron removal system as described in claim 1, characterized in that, The magnet is a permanent magnet, which is movably arranged relative to the adsorption cylinder and can be moved into or out of the adsorption cylinder. When it is moved into the adsorption cylinder, a magnetization zone is formed in the cavity, and when it is moved out of the adsorption cylinder, no magnetization zone is formed in the cavity.

3. The iron removal system as described in claim 2, characterized in that, The iron removal assembly also includes a driving device for driving a magnet to move into or out of the adsorption cylinder. The magnet is a long rod-shaped magnet. The driving device is configured to drive the magnet to move along the axis of the iron removal main pipe, so that the magnet can be movably inserted into or removed from the adsorption cylinder along the axis of the iron removal main pipe.

4. The iron removal system as described in claim 1, characterized in that, The magnet is a soft magnet that can be magnetized or demagnetized, and a magnetization region is selectively generated in a controlled manner. When the magnet is magnetized, a magnetization region is formed in the cavity, and when it is demagnetized, no magnetization region is formed in the cavity.

5. The iron removal system as described in claim 2 or claim 4, characterized in that, The iron removal components are of several kinds, and the iron removal components are arranged in a circumferential array along the axis of the main iron removal tube in the circumferential direction of the adsorption cylinder.

6. The iron removal system as described in claim 5, characterized in that, The inlet pipe includes a first inner wall surface, the main iron removal pipe includes a second inner wall surface, the first inner wall surface includes a virtual inner wall surface extending in the direction of the main iron removal pipe, the main space includes an annular space located between the virtual inner wall surface and the second inner wall surface, and the iron removal assembly is disposed in the annular space.

7. The iron removal system as described in claim 6, characterized in that, A rear transition pipe is also provided between the main iron removal pipe and the outlet pipe. The rear transition pipe includes a pipe wall with a through hole. The adsorption cylinder is configured to be inserted into the through hole and can be moved into or out of the through hole.

8. The iron removal system as described in claim 7, characterized in that, A scraper is provided on the inner side of the through hole, which abuts against the outer wall of the adsorption cylinder.

9. The iron removal system as described in claim 1, characterized in that, The adsorption cylinder includes a cylinder and a cone, with the cone facing the inlet pipe.

10. The iron removal system as described in claim 9, characterized in that, The iron removal assembly also includes a nozzle located in front of the cone and a white water pipe connected to the nozzle, wherein the nozzle is configured to spray white water toward the adsorption cylinder.

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