Flushing device for reducing rolling oil entrained by magnetic filter magnetic bar and use method

Abstract

The invention discloses a flushing device for reducing rolling oil entrained by a magnetic filter magnetic rod and a use method, the magnetic rod and a liquid level are dynamically flushed by using an emulsion with low rolling oil concentration at the middle lower part of a magnetic filter box body, or other original procedures of supplementing desalted water to the emulsion are changed into the procedures of supplementing the desalted water in the magnetic filter box body; when the desalted water is supplemented, the supplemented desalted water is used for dynamically washing the magnetic bar and the liquid level, so that the rolling oil carried by the magnetic bar when the magnetic bar rises out of the liquid level can be effectively reduced, and the comprehensive effects of reducing the rolling oil purchasing cost, reducing the environment-friendly treatment cost and reducing carbon emission caused by oil sludge hazardous waste treatment are achieved. Meanwhile, when the permanent magnet filtering device stops running, the filter in the magnetic filtering box body can be backwashed through the emulsified liquid, so that the service life of the filter is prolonged.

Description

Technical Field

[0001] This application belongs to the field of cold rolling mill emulsion purification technology, specifically relating to a flushing device and method for reducing rolling oil entrainment on magnetic filter rods. Background Technology

[0002] In the metal rolling process, emulsions are used for cooling and lubrication. Iron powder mixed in needs to be removed by a permanent magnet filter (magnetic rod). In existing technology, the emulsion level in the magnetic filter box is stable, and a large amount of rolling oil floats to the surface of the liquid level. However, after the magnetic rod is saturated with iron powder, it becomes loose. When it is lifted out of the liquid by the chain (magnetic rod drive device), a large amount of rolling oil inevitably adheres to its surface, leading to the following problems:

[0003] (1) Waste of rolling oil and increased costs: After the magnetic rod sludge absorbs the rolling oil, the oil content of the sludge is about 60%, which leads to the loss of rolling oil and increased factory costs;

[0004] (2) Increased hazardous waste treatment costs: The oil carried out increases the weight of the oil sludge hazardous waste and increases treatment costs.

[0005] (3) Increased environmental pressure: Oil sludge hazardous waste is generally treated by incineration. This part of the rolling oil is incinerated, which not only wastes resources but also increases carbon emissions.

[0006] Therefore, in order to solve the problem of rolling oil entrainment in the magnetic rod iron powder, a technology is needed to reduce the rolling oil entrainment in the magnetic filter magnetic rod. Summary of the Invention

[0007] This application provides a flushing device and method for reducing rolling oil entrainment on magnetic filter rods. By using an emulsion with a low rolling oil concentration in the lower part of the magnetic filter box to dynamically flush the magnetic rods and the liquid surface, or by changing other processes that originally involved replenishing the emulsion with demineralized water to replenishing it in the magnetic filter box, the replenished demineralized water is used to dynamically flush the magnetic rods and the liquid surface, effectively reducing the rolling oil entrainment when the magnetic rods rise out of the liquid surface. This achieves the comprehensive effect of reducing rolling oil procurement costs, reducing environmental disposal costs, and reducing carbon emissions caused by hazardous sludge treatment.

[0008] The technical solution to the technical problem solved in this application is as follows:

[0009] According to one aspect of this application, a flushing device for reducing rolling oil entrainment on magnetic filter rods is provided, comprising:

[0010] The magnetic filter box is used to hold emulsions.

[0011] A permanent magnet filtration device is located inside the magnetic filter box and is used to adsorb and filter iron powder in the emulsion of the magnetic filter box. It includes multiple magnetic rods arranged horizontally at intervals and a magnetic rod driving device for driving the multiple magnetic rods to move up and down.

[0012] The spraying device includes a filter, a delivery pump, a spraying assembly, a connecting pipe, and an intermediate pipe. The delivery pump is fixed to the outside of the magnetic filter housing. The filter is located inside the magnetic filter housing from the middle to below. The spraying assembly is located inside the magnetic filter housing and includes multiple spraying pipes arranged in parallel at intervals. The multiple spraying pipes are respectively connected to the intermediate pipe. The filter and the intermediate pipe are respectively connected to the inlet and outlet of the delivery pump through the connecting pipe. Each spraying pipe is provided with multiple nozzles. Among them, each magnetic rod has at least one spraying pipe corresponding to it. Each spraying pipe is located outside the movement path of its corresponding magnetic rod. When each magnetic rod moves to the upper part of the magnetic filter housing under the action of the magnetic rod driving device, the spraying direction of each nozzle on each spraying pipe corresponding to each magnetic rod is aligned with each magnetic rod.

[0013] Furthermore, the nozzle head is one of the following shapes: duckbill, cone, square, strip, round, elliptical, and fan-shaped. When the nozzle head is preferably duckbill shaped, the spray angle is 20-80° with the horizontal angle.

[0014] The above technical solution provides a method for using a rinsing device to reduce rolling oil entrainment on magnetic filter rods. In a cold rolling system, after using this rinsing device, the magnetic filter box contains an emulsion with rolling oil floating on its surface. This method dilutes and emulsifies the rolling oil on the surface of the emulsion by pumping out a lower concentration of the emulsion from the middle and lower parts of the magnetic filter box, creating a stirring effect. It also rinses the rolling oil adsorbed on the iron powder by the upward-moving magnetic rods. Specifically:

[0015] S1. Operate the permanent magnet filter device, and drive each magnetic rod to move downward and immerse it in the emulsion to adsorb iron powder through the magnetic rod drive device.

[0016] S2. When the permanent magnet filter is running, the delivery pump is started simultaneously. It draws the lower concentration emulsion in the lower part of the magnetic filter box through the filter and connecting pipe, and sprays it out through the intermediate pipe, the spray pipe of the spray assembly and each nozzle to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified.

[0017] S3. After each magnetic rod is saturated with iron powder, the magnetic rod driving device drives each magnetic rod to move upward and run above the emulsion liquid level surface. When each magnetic rod moves to the spraying component position, the sprayed emulsion washes the rolling oil adsorbed on the magnetic rod and iron powder.

[0018] Furthermore, a baffle is provided inside the magnetic filter box above the injection assembly. The baffle is used to intercept the fluid injected by the injection device and guide the injected fluid back into the magnetic filter box.

[0019] Based on the above-mentioned flushing device technical solution, as a further improvement of the flushing device, the flushing device also includes a demineralized water supply device, the demineralized water supply device includes a demineralized water pipe connected to the intermediate pipe, the demineralized water pipe is provided with a second solenoid valve, and the connecting pipe between the outlet of the delivery pump and the intermediate pipe is provided with a first solenoid valve.

[0020] As a further improvement to the above technical solution, the above flushing device also includes a controller, a second pipeline pressure sensor is provided on the desalination water pipeline, a first pipeline pressure sensor is provided on the connecting pipeline between the outlet of the delivery pump and the intermediate pipeline, and the delivery pump, magnetic rod drive device, first solenoid valve, second solenoid valve, first pipeline pressure sensor and second pipeline pressure sensor are connected to the controller through a line.

[0021] By improving the rinsing device described above, the original process of replenishing the emulsion with demineralized water can be changed to replenishment within the magnetic filter tank. Simultaneously, the replenished demineralized water is used to dynamically rinse the magnetic rod and the liquid surface. In other words, the rinsing device has two rinsing modes, which the operator can choose. The specific method is as follows:

[0022] S1. Operate the permanent magnet filter device, and drive each magnetic rod to move downward and immerse it in the emulsion to adsorb iron powder through the magnetic rod drive device.

[0023] S2. When the permanent magnet filter is running, choose one of the following two operating modes:

[0024] Method 1: Close the second solenoid valve, open the first solenoid valve, and simultaneously start the delivery pump. The pump draws in the lower layer of the magnetic filter box with a lower concentration of emulsion through the filter and connecting pipe, and sprays it out through the intermediate pipe, the spray pipe of the spray assembly, and each nozzle to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified.

[0025] Method 2: Close the first solenoid valve and the delivery pump, open the second solenoid valve, and spray the demineralized water through the demineralized water pipe, the intermediate pipe, and the spray pipe and nozzles of the spray assembly to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified, and at the same time participates in the emulsion water replenishment.

[0026] S3. After each magnetic rod is saturated with iron powder, the magnetic rod driving device drives each magnetic rod to move upward and run above the emulsion liquid level surface. When each magnetic rod moves to the spray assembly position, the rolling oil adsorbed on the magnetic rod and iron powder is rinsed by the sprayed emulsion or demineralized water.

[0027] In the above-mentioned flushing device technical solution, the spraying component of the spraying device can be configured in the following ways:

[0028] Method 1: A top-down spraying method is adopted, that is, when each of the magnetic rods moves to the upper part of the magnetic filter box under the action of the magnetic rod driving device, the spraying assembly is located above the height of the magnetic rod.

[0029] Method 2: The method of setting spray pipes and nozzles at both the upper and lower parts, that is: the spray assembly has at least two spray pipes corresponding to each magnetic rod, and they are located above and below the height of the magnetic rod, respectively.

[0030] Method 3: An upward spraying method is used, where the spraying assembly is positioned below the height of the magnetic rods when the magnetic rods move to the upper part of the magnetic filter housing under the action of the magnetic rod driving device. In this method, the delivery pump is a gear pump capable of forward and reverse rotation, allowing for backwashing of the filter inside the magnetic filter housing when the permanent magnet filter device stops working, thereby increasing the filter's lifespan.

[0031] When using method three above, ensure that the top of the nozzle head of each nozzle in the spray assembly is 3-5 cm below the emulsion level surface. The specific usage method is as follows:

[0032] S1. Operate the permanent magnet filter device, and drive each magnetic rod to move downward and immerse it in the emulsion to adsorb iron powder through the magnetic rod drive device.

[0033] S2. When the permanent magnet filter is running, choose one of the following two operating modes:

[0034] Method 1: Close the second solenoid valve, open the first solenoid valve, and simultaneously start the delivery pump and make the delivery pump rotate in the forward direction. The lower concentration of the emulsion in the magnetic filter box is drawn through the filter and connecting pipe, and sprayed out through the intermediate pipe, the spray pipe of the spray assembly and each nozzle to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified.

[0035] Method 2: Close the first solenoid valve and the delivery pump, open the second solenoid valve, and spray the demineralized water through the demineralized water pipe, the intermediate pipe, and the spray pipe and nozzles of the spray assembly to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified, and at the same time participates in the emulsion water replenishment.

[0036] S3. After each magnetic rod is saturated with iron powder, the magnetic rod driving device drives each magnetic rod to move upward and run above the emulsion liquid level surface. When each magnetic rod moves to the spray assembly position, the rolling oil adsorbed on the magnetic rod and iron powder is rinsed by the sprayed emulsion or demineralized water.

[0037] S4. When the permanent magnet filter stops running, open the first solenoid valve, close the second solenoid valve, and control the delivery pump to reverse so as to backwash the filter with emulsion.

[0038] Compared with the prior art, the flushing device and method for reducing rolling oil entrainment on the magnetic filter rod described in this application have the following advantages:

[0039] (1) This application has a simple structure, is easy to integrate, and is applicable to the modification and use of magnetic filter equipment in various cold rolling mills. It is low in cost and has good effect.

[0040] (2) When the spray assembly of this application uses the middle and lower layer of emulsion in the magnetic filter box for rinsing, the rolling oil concentration of the emulsion at this position is low, close to that of hot water. The low-concentration emulsion is guided by each nozzle. Before each magnetic rod of the permanent magnet filter moves to the surface of the emulsion, the rolling oil floating on the surface of the liquid is diluted and a stirring effect is generated on the rolling oil on the surface of the liquid, so that the rolling oil in the local area is emulsified, reducing the concentration of rolling oil on the surface of the liquid around the magnetic rod. This prevents the loose iron powder on each magnetic rod from adsorbing a large amount of rolling oil, but only a layer of low-concentration emulsion is attached, which greatly reduces the entrainment loss of rolling oil. At the same time, when the magnetic rod passes through the liquid surface and reaches the surface above the liquid surface, each nozzle of the spray pipe sprays the low-concentration emulsion in strips onto the magnetic rod, which can further rinse the adsorbed rolling oil and improve the use effect.

[0041] (3) By switching the first solenoid valve and the second solenoid valve, this application changes the other processes of replenishing demineralized water to be completed in the magnetic filter box through the demineralized water supply device. At the same time, the replenished demineralized water can be sprayed onto the magnetic rod and the liquid surface through the spray assembly, which can more effectively reduce the concentration of rolling oil on the liquid surface around the magnetic rod and reduce the amount of rolling oil carried by the magnetic rod and the iron powder it adsorbs.

[0042] (4) Adding demineralized water to the magnetic filter box can reduce the concentration of emulsion from the permanent magnet filter to the vacuum filter, thus avoiding overflow caused by excessive resistance of the flat bed.

[0043] (5) This application utilizes the liquid (emulsion) inside the magnetic filter box, or adds a water replenishment function to the emulsion inside the magnetic filter box, without the need for additional chemical additions, effectively reducing operation and maintenance costs.

[0044] (6) When no demineralized water needs to be replenished and the permanent magnet filter stops running, the control pump reverses its operation and backwashes the filter element according to the preset time, which can effectively extend the filter life.

[0045] (7) This application has significant oil-saving effect and economic benefits, and can enhance the ability to maintain the concentration of rolling oil in the emulsion. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of one structure of a flushing device for reducing rolling oil entrainment on a magnetic filter rod according to this application (the spraying assembly is located below the magnetic rod).

[0047] Figure 2 This is a schematic diagram of one structure of a flushing device for reducing rolling oil entrainment on a magnetic filter rod according to this application (the spray pipes of the spray assembly are located above and below the magnetic rod).

[0048] Figure 3 This is a schematic diagram of one structure of a flushing device for reducing rolling oil entrainment on a magnetic filter rod according to this application (the spraying assembly is located above the magnetic rod).

[0049] Figures 4-8 This is a diagram showing the positional distribution of the injection pipe and its nozzle relative to the magnetic rod in this application;

[0050] Figure 9 This is a schematic diagram of one type of nozzle used in this application;

[0051] Figure 10 This is a connection diagram of the controller, pump, and solenoid valve in this application;

[0052] In the diagram: 1. Magnetic filter housing; 2. Filter; 3. Transfer pump; 4. First solenoid valve; 5. Demineralized water pipeline; 6. Second solenoid valve; 7. Spray pipeline; 8. Nozzle; 9. Magnetic rod; 10. Baffle; 11. Emulsion; 12. Connecting pipeline; 13. Intermediate pipeline; 14. Controller; 15. First pipeline pressure sensor; 16. Second pipeline pressure sensor; 17. Magnetic rod drive device. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," and "back" used in the specification and claims of this patent application are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Anything not detailed in this application is common knowledge to those skilled in the art.

[0054] Example 1:

[0055] like Figure 1-9 As shown, this application provides a flushing device for reducing rolling oil entrainment on magnetic filter rods. It includes a magnetic filter box 1, a permanent magnet filter device, a spraying device, etc. It is used to reduce the rolling oil concentration on the emulsion surface inside the magnetic filter box 1 and to flush the permanent magnet filter device and the rolling oil entrained by the iron powder on it when the permanent magnet filter device adsorbs and purifies the emulsion in the cold rolling mill system.

[0056] The magnetic filter box 1 and the permanent magnet filter device are existing equipment in the cold rolling mill system. The inner side of the magnetic filter box 1 is used to hold the emulsion 11 returned from the mill emulsion collection tank and the emulsion return pump. The emulsion 11 is fed in through a pipe at the bottom of the magnetic filter box 1 and overflows into the vacuum filter paper filter through a pipe at the top of the magnetic filter box 1. The emulsion collection tank, the emulsion return pump, and the method of feeding the emulsion into the magnetic filter box 1 from the bottom and overflowing it into the vacuum filter paper filter through a pipe at the top of the magnetic filter box 1 are prior art and not the technical solution to be protected in this application. Therefore, they will not be described further here, and are not shown in the accompanying drawings.

[0057] The permanent magnet filtration device is also an existing device, located inside the magnetic filter box 1. It includes multiple magnetic rods 9 arranged horizontally at intervals and a magnetic rod drive device 17 for driving the multiple magnetic rods 9 to move up and down. The magnetic rod drive device 17 is generally a chain mechanism (a common existing mechanism, not shown in the attached drawings of the instruction manual). It drives each magnetic rod 9 to move down into the emulsion 11 inside the magnetic filter box 1 to adsorb iron powder. After the iron powder is saturated, it drives each magnetic rod 9 to rise to the highest position above the liquid surface, and then scrapes and collects the iron powder by the scraper.

[0058] The spraying device includes a filter 2, a delivery pump 3, a spraying assembly, a connecting pipe 12, and an intermediate pipe 13. The delivery pump 3 is fixed to the outside of the magnetic filter housing 1, and the filter 2 is located inside the magnetic filter housing 1 from the middle to the bottom. The spraying assembly is located on the upper part of the inner side of the magnetic filter housing 1, and includes multiple spraying pipes 7 arranged in parallel at intervals. The multiple spraying pipes 7 are respectively connected to the intermediate pipe 13. The filter 2 and the intermediate pipe 13 are respectively connected to the inlet and outlet of the delivery pump 3 through the connecting pipe 12. Each spraying pipe 7 is provided with multiple nozzles 8. Among them, each magnetic rod 9 has at least one spraying pipe 7 corresponding to it. Each spraying pipe 7 is located outside the movement path of its corresponding magnetic rod 9, that is, when each magnetic rod 9 moves up and down, there is no interference between each spraying pipe 7 and the corresponding magnetic rod 9. When each magnetic rod 9 moves to the upper part of the magnetic filter housing 1 under the action of the magnetic rod driving device, the spraying direction of each nozzle 8 on each spraying pipe 7 corresponding to each magnetic rod 9 is aligned with each magnetic rod 9.

[0059] In this embodiment, the nozzle head of the nozzle 8 is one of the following shapes: duckbill, cone, square, strip, circle, ellipse, and fan. When the nozzle head is preferably duckbill shaped, its spray angle is 20-80° with the horizontal angle, which can form a flat fan-shaped jet to cover the rising path area of ​​the magnetic rod 9 and the local area of ​​the liquid surface.

[0060] Example 2:

[0061] Example 1 describes a method for using a flushing device to reduce rolling oil entrainment on a magnetic filter rod. The magnetic filter housing 1 contains an emulsion 11, and rolling oil floats on the surface of the emulsion 11. The method of use is as follows:

[0062] S1. The permanent magnet filter device is operated. The magnetic rod drive device 17 drives each magnetic rod 9 to move downward and immerse it in the emulsion 11 to adsorb iron powder.

[0063] S2. When the permanent magnet filter is running, the delivery pump 3 is started simultaneously. The lower concentration emulsion 11 in the magnetic filter box 1 is drawn through the filter 2 and the connecting pipe 12. The rolling oil concentration of the emulsion at this position is low, close to that of hot water. Then it is sprayed out through the intermediate pipe 13 and the spray pipe 7 and each nozzle 8 of the spray assembly to form a strip-shaped spray beam to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified.

[0064] S3. After each magnetic rod 9 is saturated with iron powder, the magnetic rod driving device drives each magnetic rod 9 to move upward and run above the liquid level surface of the emulsion 11. When each magnetic rod 9 moves to the position of the spraying component and moves out of the liquid surface, the emulsion sprayed by the spraying component washes the rolling oil adsorbed on the magnetic rod 9 and the iron powder.

[0065] In this embodiment, the emulsion in the lower middle part of the magnetic filter box is used to rinse the magnetic rod and the liquid surface, which can effectively reduce the concentration of rolling oil on the liquid surface, thereby significantly reducing the rolling oil adsorbed by iron powder on the magnetic rod. At the same time, when the magnetic rod moves to the position of the spraying component, the sprayed emulsion rinses the magnetic rod again, further reducing the rolling oil entrained in the magnetic rod and iron powder.

[0066] Example 3:

[0067] During the operation of a cold rolling mill, it is usually necessary to replenish the emulsion with demineralized water. The demineralized water can also serve to flush the rolling oil and reduce the concentration of rolling oil on the liquid surface. Therefore, this embodiment 3 optimizes and improves the flushing device in embodiment 1 based on embodiment 1, and provides a flushing device that reduces the rolling oil carried by the magnetic filter rod. The process originally used to replenish the emulsion with demineralized water is used to flush the rolling oil carried by the magnetic rod and dilute the concentration of the rolling oil. As shown in the figures, it includes a demineralized water supply device, which includes a demineralized water pipe 5 connected to the intermediate pipe 13 for supplying demineralized water. A second solenoid valve 6 is provided on the demineralized water pipe 5. A first solenoid valve 4 is provided on the connecting pipe 12 between the outlet of the delivery pump 3 and the intermediate pipe 13 for switching between demineralized water and emulsion during flushing.

[0068] In this preferred embodiment, the rinsing device further includes a controller 14 for interlocking control of the entire rinsing device. A second pipeline pressure sensor 15 is provided on the demineralized water pipeline 5 to monitor the pressure of the demineralized water so as to control the opening of the second solenoid valve as needed. A first pipeline pressure sensor 16 is provided on the connecting pipeline 12 between the outlet of the delivery pump 3 and the intermediate pipeline 13 to monitor the pressure of the emulsion so as to control the speed of the delivery pump and the opening of the first solenoid valve as needed. The delivery pump 3, the magnetic rod drive device 17, the first solenoid valve 4, the second solenoid valve 6, the first pipeline pressure sensor 16, and the second pipeline pressure sensor 15 are connected to the controller 14 via wiring.

[0069] Example 4

[0070] Example 3 describes a method for using a rinsing device to reduce rolling oil entrainment on magnetic filter rods. The magnetic filter housing 1 contains an emulsion 11, with rolling oil floating on its surface. This method allows for both emulsion rinsing and demineralized water rinsing, simultaneously replenishing the demineralized water. The specific usage method is as follows:

[0071] S1. Operate the permanent magnet filter device, and drive each magnetic rod 9 downward to be immersed in the emulsion 11 to adsorb iron powder through the magnetic rod drive device.

[0072] S2. When the permanent magnet filter is running, choose one of the following two operating modes:

[0073] Method 1: Close the second solenoid valve 6, open the first solenoid valve 4, and simultaneously start the delivery pump 3. The pump draws the lower concentration emulsion 11 from the magnetic filter box 1 through the filter 2 and connecting pipe 12, and sprays it out through the intermediate pipe 13, the spray pipe 7 of the spray assembly, and each nozzle 8 to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified.

[0074] Method 2: Close the first solenoid valve 4 and the transfer pump 3, open the second solenoid valve 6, and spray the demineralized water through the demineralized water pipe 5, the intermediate pipe 13, and the spray pipe 7 and each nozzle 8 of the spray assembly to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified, and at the same time participates in the emulsion water replenishment.

[0075] S3. After each magnetic rod 9 is saturated with iron powder, the magnetic rod driving device drives each magnetic rod 9 to move upward and run above the liquid level surface of the emulsion 11. When each magnetic rod 9 moves to the position of the spraying component, the rolling oil adsorbed on the magnetic rod 9 and the iron powder is rinsed by the sprayed emulsion or demineralized water.

[0076] In this embodiment, when the flushing device is running, the speed of the pump 3 motor and the opening of the first and second solenoid valves can be adjusted by the controller or manually to dynamically adjust the spray pressure according to the actual working conditions. This prevents the iron powder adsorbed by the magnetic rod from falling off due to excessive pressure, and also avoids the inability to effectively disperse the rolling oil accumulated around the magnetic rod due to insufficient pressure.

[0077] Example 5

[0078] Based on the flushing device for reducing rolling oil entrainment in the magnetic filter rods in Examples 1 and 3, in this embodiment, the delivery pump 3 is a gear pump capable of both forward and reverse rotation. When each magnetic rod 9 moves to the upper part of the magnetic filter housing 1 under the action of the magnetic rod driving device, the spray assembly is located below the height of the magnetic rod 9. That is, when the spray assembly sprays and flushes, each spray pipe 7 and nozzle 8 is located below each magnetic rod 9. The arrangement of the spray pipe 7 can be varied, such as... Figure 4 and Figure 5 As shown, a jet pipe 7 is provided on the left or right side of the magnetic rod 9, such as... Figure 6 As shown, spray pipes 7 are arranged on both sides of the magnetic rod 9. The arrangement of the spray pipes 7 includes, but is not limited to, the above-described arrangement, and any arrangement below the magnetic rod is within the scope of protection of this application. In this embodiment, the delivery pump 3 is equipped with a gear pump that can rotate in both directions, so that when the permanent magnet filter is not working, the filter 2 can be backwashed by reversing the delivery pump 3 to increase the service life of the filter 2. When using this embodiment, it is necessary to ensure that the spray assembly is located 3-5 cm below the emulsion surface to facilitate the reverse backwashing of the delivery pump 3.

[0079] Example 6

[0080] Example 5 describes a method for using a flushing device to reduce rolling oil entrainment on a magnetic filter rod. The magnetic filter housing 1 contains an emulsion 11, with rolling oil floating on its surface. The method ensures that the top of the nozzle head of each nozzle 8 in the spray assembly is 3-5 cm below the surface of the emulsion 11. The method of use is as follows:

[0081] S1. Operate the permanent magnet filter device, and drive each magnetic rod 9 downward to be immersed in the emulsion 11 to adsorb iron powder through the magnetic rod drive device.

[0082] S2. When the permanent magnet filter is running, choose one of the following two operating modes:

[0083] Method 1: Close the second solenoid valve 6, open the first solenoid valve 4, and simultaneously start the delivery pump 3 and make the delivery pump 3 rotate forward. The lower concentration emulsion 11 in the magnetic filter box 1 is drawn through the filter 2 and the connecting pipe 12, and sprayed out through the intermediate pipe 13 and the spray pipe 7 and each nozzle 8 of the spray assembly to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified.

[0084] Method 2: Close the first solenoid valve 4 and the transfer pump 3, open the second solenoid valve 6, and spray the demineralized water through the demineralized water pipe 5, the intermediate pipe 13, and the spray pipe 7 and each nozzle 8 of the spray assembly to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified, and at the same time participates in the emulsion water replenishment.

[0085] S3. After each magnetic rod 9 is saturated with iron powder, the magnetic rod driving device drives each magnetic rod 9 to move upward and run above the liquid level surface of the emulsion 11. When each magnetic rod 9 moves to the position of the spraying component, the rolling oil adsorbed on the magnetic rod 9 and the iron powder is rinsed by the sprayed emulsion or demineralized water.

[0086] S4. When the permanent magnet filter stops running, open the first solenoid valve 4, close the second solenoid valve 6, control the delivery pump 3 to reverse, and backwash the filter 2 through the emulsion 11.

[0087] Example 7:

[0088] Based on the flushing device for reducing rolling oil entrainment in the magnetic filter rods in Examples 1 and 3, the spray assembly can also be configured in various ways:

[0089] A top-down spraying method is adopted, meaning that when each magnetic rod 9 moves to the upper part of the magnetic filter box 1 under the action of the magnetic rod drive device, the spraying assembly is located above the height of the magnetic rod 9. In this case, the layout of the spraying pipe 7 is similar to the layout when the spraying assembly is below the height of the magnetic rod 9, the difference being that... Figure 3 , Figure 7 As shown, the injection pipe 7 and nozzle 8 are located above the magnetic rod 9.

[0090] The system employs a configuration where injection pipes and nozzles are installed at both the top and bottom. Specifically, the injection assembly has at least two injection pipes 7 corresponding to each magnetic rod 9, located above and below the height of that magnetic rod 9, respectively. Figure 2 , Figure 8 As shown, the layout of the injection pipe 7 can be determined by considering both the top-down and bottom-up injection methods of the injection assembly.

[0091] Example 8

[0092] Based on the rinsing device in the above embodiments, in order to prevent the fluid from splashing to the outside of the magnetic filter box 1 during rinsing, a baffle 10 is provided on the inner side of the magnetic filter box 1 above the spraying assembly. Through the height and position design of the baffle 10, the sprayed fluid is effectively blocked and falls back into the emulsion body, avoiding splash loss and promoting the emulsification and dispersion of rolling oil in local areas.

Claims

1. A flushing device for reducing rolling oil entrainment on magnetic filter rods, characterized in that, include: Magnetic filter box (1) is used to hold emulsion; The permanent magnet filter device is located inside the magnetic filter box (1), and includes multiple magnetic rods (9) arranged horizontally at intervals and a magnetic rod driving device for driving the multiple magnetic rods (9) to move up and down. The spraying device includes a filter (2), a delivery pump (3), a spraying assembly, a connecting pipe (12), and an intermediate pipe (13). The delivery pump (3) is located outside the magnetic filter box (1). The filter (2) is located inside the magnetic filter box (1) from the middle to the bottom. The spraying assembly is located inside the magnetic filter box (1) at the upper part. It includes multiple spraying pipes (7) arranged in parallel and spaced apart. The multiple spraying pipes (7) are respectively connected to the intermediate pipe (13). The filter (2) and the intermediate pipe (13) are respectively connected to the inlet and outlet of the delivery pump (3) through the connecting pipe (12). Each spraying pipe (7) is provided with multiple nozzles (8). Wherein: each of the magnetic rods (9) has at least one spray pipe (7) corresponding to it, and each spray pipe (7) is located outside the moving path of its corresponding magnetic rod (9). When each magnetic rod (9) moves to the upper part of the magnetic filter box (1) under the action of the magnetic rod driving device, the spray direction of each nozzle (8) on each spray pipe (7) corresponding to each magnetic rod (9) is aligned with each magnetic rod (9).

2. The flushing device for reducing rolling oil entrainment on magnetic filter rods according to claim 1, characterized in that, The nozzle (8) has a nozzle head that is one of the following shapes: duckbill, cone, square, strip, round, elliptical and fan-shaped. When the nozzle head is duckbill shaped, its spray angle is 20-80° with the horizontal angle.

3. The flushing device for reducing rolling oil entrainment on magnetic filter rods according to claim 1, characterized in that, A baffle (10) is provided on the inner side of the magnetic filter box (1) above the spray assembly.

4. A flushing device for reducing rolling oil entrainment on magnetic filter rods according to any one of claims 1-3, characterized in that, It also includes a demineralized water supply device, which includes a demineralized water pipe (5) connected to the intermediate pipe (13), a second solenoid valve (6) on the demineralized water pipe (5), and a first solenoid valve (4) on the connecting pipe (12) between the outlet of the delivery pump (3) and the intermediate pipe (13).

5. A flushing device for reducing rolling oil entrainment on magnetic filter rods according to claim 4, characterized in that, It also includes a controller (14), a second pipeline pressure sensor (15) is provided on the demineralized water pipeline (5), a first pipeline pressure sensor (16) is provided on the connecting pipeline (12) between the outlet of the delivery pump (3) and the intermediate pipeline (13), and the delivery pump (3), the magnetic rod drive device (17), the first solenoid valve (4), the second solenoid valve (6), the first pipeline pressure sensor (16) and the second pipeline pressure sensor (15) are connected to the controller (14) through a line.

6. A flushing device for reducing rolling oil entrainment on magnetic filter rods according to claim 4, characterized in that, The delivery pump (3) is a gear pump capable of forward and reverse rotation; when each of the magnetic rods (9) moves the upper part of the magnetic filter box (1) under the action of the magnetic rod driving device, the spray assembly is located below the height of the magnetic rod (9).

7. A flushing device for reducing rolling oil entrainment on magnetic filter rods according to claim 4, characterized in that, When each of the magnetic rods (9) moves the upper part of the magnetic filter box (1) under the action of the magnetic rod driving device, the spray assembly is located above the height of the magnetic rod (9), or there are at least two spray pipes (7) in the spray assembly corresponding to each magnetic rod (9), which are located above and below the height of the magnetic rod (9) respectively.

8. A method of using a flushing device for reducing rolling oil entrainment on a magnetic filter rod according to any one of claims 1-7, wherein the magnetic filter housing (1) contains an emulsion (11), and rolling oil floats on the surface of the emulsion (11), characterized in that, The usage method is as follows: S1. Run the permanent magnet filter device and drive each magnetic rod (9) downward through the magnetic rod drive device to immerse it in the emulsion (11) to adsorb iron powder. S2. When the permanent magnet filter is running, the delivery pump (3) is started synchronously. The lower concentration emulsion (11) in the magnetic filter box (1) is drawn through the filter (2) and the connecting pipe (12), and sprayed out through the intermediate pipe (13) and the spray pipe (7) and each nozzle (8) of the spray assembly to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified. S3. After each magnetic rod (9) is saturated with iron powder, the magnetic rod (9) is driven upward by the magnetic rod driving device and runs above the liquid level surface of the emulsion (11). When each magnetic rod (9) moves to the position of the spraying assembly, the rolling oil adsorbed on the magnetic rod (9) and the iron powder is washed by the sprayed emulsion.

9. A method of using a flushing device for reducing rolling oil entrainment on a magnetic filter rod according to any one of claims 4-7, wherein the magnetic filter housing (1) contains an emulsion (11), and rolling oil floats on the surface of the emulsion (11), characterized in that, The usage method is as follows: S1. Run the permanent magnet filter device and drive each magnetic rod (9) downward through the magnetic rod drive device to immerse it in the emulsion (11) to adsorb iron powder. S2. When the permanent magnet filter is running, choose one of the following two operating modes: Method 1: Close the second solenoid valve (6), open the first solenoid valve (4), and start the delivery pump (3) simultaneously. The lower concentration emulsion (11) in the magnetic filter box (1) is drawn through the filter (2) and the connecting pipe (12), and sprayed out through the intermediate pipe (13) and the spray pipe (7) and each nozzle (8) of the spray assembly to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified. Method 2: Close the first solenoid valve (4) and the delivery pump (3), open the second solenoid valve (6), and spray the demineralized water through the demineralized water pipe (5), the intermediate pipe (13), the spray pipe (7) of the spray assembly, and each nozzle (8) to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified, and at the same time participates in the emulsion water replenishment. S3. After each magnetic rod (9) is saturated with iron powder, the magnetic rod (9) is driven upward by the magnetic rod driving device and runs above the liquid level surface of the emulsion (11). When each magnetic rod (9) moves to the position of the spraying assembly, the rolling oil adsorbed on the magnetic rod (9) and the iron powder is rinsed by the sprayed emulsion or desalinated water.

10. A method of using a flushing device for reducing rolling oil entrainment on a magnetic filter rod according to claim 6, wherein the magnetic filter box (1) contains an emulsion (11), and rolling oil floats on the surface of the emulsion (11), characterized in that, Ensure that the top of the nozzle head of each nozzle (8) in the spray assembly is 3-5 cm below the surface of the emulsion (11). The method of use is as follows: S1. Run the permanent magnet filter device and drive each magnetic rod (9) downward through the magnetic rod drive device to immerse it in the emulsion (11) to adsorb iron powder. S2. When the permanent magnet filter is running, choose one of the following two operating modes: Method 1: Close the second solenoid valve (6), open the first solenoid valve (4), start the delivery pump (3) synchronously and make the delivery pump (3) rotate in the forward direction, draw the lower concentration emulsion (11) in the magnetic filter box (1) through the filter (2) and connecting pipe (12), and spray it out through the intermediate pipe (13) and the spray pipe (7) and each nozzle (8) of the spray assembly to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified; Method 2: Close the first solenoid valve (4) and the delivery pump (3), open the second solenoid valve (6), and spray the demineralized water through the demineralized water pipe (5), the intermediate pipe (13), the spray pipe (7) of the spray assembly, and each nozzle (8) to dilute the rolling oil on the liquid surface and generate a stirring effect on the rolling oil on the liquid surface, so that the rolling oil in the local area is emulsified, and at the same time participates in the emulsion water replenishment. S3. After each magnetic rod (9) is saturated with iron powder, the magnetic rod (9) is driven upward by the magnetic rod driving device and runs above the liquid level surface of the emulsion (11). When each magnetic rod (9) moves to the position of the spraying assembly, the rolling oil adsorbed on the magnetic rod (9) and the iron powder is rinsed by the sprayed emulsion or desalinated water. S4. When the permanent magnet filter stops running, open the first solenoid valve (4), close the second solenoid valve (6), control the delivery pump (3) to reverse, and backwash the filter (2) through the emulsion (11).

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