A filtration device and filtration method for the production of scale and corrosion inhibitors.

Abstract

This invention belongs to the technical field of separation devices, and particularly relates to a filtration device and method for producing scale and corrosion inhibitors. It includes a filter tank and a filter screen. The filter screen is slidably mounted inside the filter tank. A collection rack is provided inside the filter tank. The collection rack has a second liquid permeation hole, a collection tank, and a third filter hole. The second liquid permeation hole is located vertically above the bottom surface of the collection tank. The third filter hole is located on the side wall of the collection tank. The collection rack is located above the filter screen and is slidably mounted inside the filter tank. When the collection rack and the filter screen move downwards synchronously, the liquid below the filter screen impacts the filter screen, causing impurities to detach from it. The liquid carrying impurities passes through the second liquid permeation hole and enters the collection tank. When the collection rack moves upwards, the liquid in the collection tank is filtered by the third filter hole, and the impurities remain in the collection tank. This invention solves the problem of scale and corrosion inhibitor waste caused by backflushing the filter assembly with water, thus reducing production costs.

Description

Technical Field

[0001] This invention belongs to the field of separation device technology, and particularly relates to a filtration device and filtration method for the production of scale inhibitors and corrosion inhibitors. Background Technology

[0002] Scale and corrosion inhibitors are chemical agents used to prevent scale formation in water systems and slow down metal corrosion. These agents are widely used in industrial cooling water systems, boiler water treatment, oil extraction, and other systems that require or use water as a medium to improve equipment efficiency, extend service life, and reduce maintenance costs.

[0003] During the preparation of scale and corrosion inhibitors, issues such as insufficient purity of raw materials or byproducts generated during chemical synthesis may result in the presence of water-insoluble impurities in the finished product. If not filtered out, these impurity particles may deposit in pipes, valves, pumps, or other critical components, adversely affecting equipment operation. Current technologies typically use filters to remove these impurities; however, as filtration time increases, the filters become clogged, reducing filtration efficiency. Cleaning the filters requires shutting down the equipment, further decreasing filtration efficiency and impacting production.

[0004] Chinese invention patent document CN117619008B discloses a chemical product filter and its filtration method, including the following steps: Step 1, filtration: The chemical product enters the housing through the inlet, is filtered by the filter plate, and is discharged through the outlet; Step 2, cleaning: After multiple filtrations, water is added to the housing, and the inlet and outlet are sealed. A second driving component drives a cam to rotate, causing a push plate to move upward, thus allowing water to flow from bottom to top through the filter plate and into the second collection housing, carrying out impurities attached to the filter holes. Simultaneously, the turntable rotates, causing the upper baffle to move upward, and the first plate, second plate, and second collection housing to move downward. The mesh between the first and second plates is aligned, connecting the second collection shell and the collection chamber. Wastewater containing impurities enters the collection chamber. The second drive unit rotates in the opposite direction, causing the first plate, the second plate, and the second collection shell to move upward, reducing the volume of the collection chamber. The clean water filtered by the upper plate returns to the upper chamber. After cleaning, the first drive unit drives the backwash assembly and the collection assembly to move axially along the first and second transmission rods until they move to the next cleaning position, repeating the cleaning process. The third step is sewage discharge. When the entire filter plate is cleaned, the collection assembly moves to the sewage outlet, which connects to the collection chamber. Wastewater and impurities in the collection chamber can be discharged through the sewage outlet. When using the aforementioned patented scale and corrosion inhibitor, although the filter components can be cleaned without removing them, the backwashing liquid is water, not the liquid to be filtered. After filtration, the filter components will have the effective components of the scale and corrosion inhibitor attached to them. When backwashing with water, these scale and corrosion inhibitors will be washed away, resulting in the loss of effective components. When there are many impurities in the scale and corrosion inhibitor and frequent backwashing is required, a lot of scale and corrosion inhibitors will be wasted, which is not conducive to controlling production costs. Summary of the Invention

[0005] This invention provides a filtration device and filtration method for the production of scale and corrosion inhibitors, in order to solve the technical problem that backwashing the filter components with water easily leads to the waste of scale and corrosion inhibitors, and to reduce production costs.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A filtration device for producing scale and corrosion inhibitors includes a filter tank and a filter screen arranged horizontally inside the filter tank. The filter screen has vertically penetrating filter holes for filtering impurities in the scale and corrosion inhibitor. The filter screen is slidably mounted inside the filter tank. A collection rack is provided inside the filter tank. The collection rack has a liquid permeation hole, a collection tank, and a filter hole. The liquid permeation hole is located vertically above the bottom surface of the collection tank. The filter hole is located on the side wall of the collection tank. The collection rack is located above the filter screen and is slidably mounted inside the filter tank. When the collection rack and the filter screen move downward synchronously, the liquid below the filter screen impacts the filter screen, causing impurities to detach from the filter screen. The liquid carrying impurities passes through the liquid permeation hole and enters the collection tank. When the collection rack moves upward, the liquid in the collection tank is filtered by the filter hole, and the impurities remain in the collection tank.

[0008] The collection rack and filter screen 1 move downwards synchronously at an accelerated speed. The liquid below filter screen 1 is pressurized and moves above filter screen 1 after passing through filter hole 1. It impacts filter screen 1, carrying away the impurities remaining on filter screen 1 and backwashing filter screen 1. There is no need to introduce water or other liquids to backwash filter screen 1. The original liquid in the filter tank is used to clean filter screen 1, effectively reducing the waste of scale inhibitors and corrosion inhibitors. The impurities detached from filter screen 1 pass through liquid permeation hole 2 and enter the collection tank, where they are filtered by filter hole 3. This prevents impurities from remaining on filter screen 1 and causing blockage, ensuring that filter screen 1 always maintains a high filtration efficiency.

[0009] Furthermore, the filter tank is equipped with a sealing frame located below the collection frame. The sealing frame and the collection frame are axially fixed and circumferentially rotatable. The sealing frame has three liquid permeation holes and two clearance holes. When the sealing frame rotates to the point where the three liquid permeation holes are connected to the two liquid permeation holes, the sealing frame closes the three filter holes, and the liquid carrying impurities passes upward through the two liquid permeation holes and the three liquid permeation holes and enters the collection tank. When the sealing frame rotates to the point where the three liquid permeation holes are misaligned with the two liquid permeation holes, the sealing frame closes the two liquid permeation holes, and the three filter holes are connected to the two clearance holes, and the liquid carrying impurities is filtered through the three filter holes.

[0010] Furthermore, the collection rack is provided with filter hole four, which is located on the inner bottom surface of the collection tank. The sealing rack is provided with clearance hole one. When the sealing rack rotates to the point where liquid permeation hole two and liquid permeation hole three are connected, the sealing rack seals filter hole four. When the sealing rack rotates to the point where liquid permeation hole two and liquid permeation hole three are misaligned, filter hole four and clearance hole one are connected.

[0011] The rotating closure frame opens and closes the second liquid permeation hole. When the collection frame is at its lowest point, the amount of liquid with impurities above the second liquid permeation hole is the largest. At this point, rotating the closure frame closes the second liquid permeation hole, preventing impurities from flowing back, improving the collection efficiency of impurities, reducing the amount of impurities remaining above the first filter screen, avoiding frequent backwashing of the first filter screen, and extending the service life of the first filter screen. During the backwashing process of the first filter screen, the third and fourth filter holes are closed, reducing the liquid flow path and increasing the impact force of the liquid on the first filter screen, causing more impurities to be flushed away from the first filter screen. The closure frame is located below the collection frame to prevent the liquid from violently impacting the third and fourth filter holes when passing through the second liquid permeation hole, thus extending the service life of the collection frame.

[0012] Furthermore, the filter tank is equipped with a horizontally arranged filter screen two, which is located below the filter screen one. The filter screen two has a vertically penetrating filter hole two, the diameter of the filter hole two is smaller than that of the filter hole one, and the diameters of the filter hole three and filter hole four are not larger than that of the filter hole two.

[0013] Furthermore, a movable frame is slidably mounted inside the filter tank. The collection frame and the sealing frame are axially fixed and circumferentially rotated on the movable frame. When the sealing frame closes the liquid permeation hole two or when the liquid permeation hole two is connected to the liquid permeation hole three, the collection frame and the sealing frame are relatively fixed.

[0014] Furthermore, a cleaning brush is provided above both filter screen one and filter screen two. The cleaning brush includes bristles for contacting filter screen one and filter screen two, and the cleaning brush is mounted inside the filter canister and rotates around a vertical axis.

[0015] The cleaning brush cleans both filter screens in real time, ensuring they maintain high filtration efficiency and avoiding frequent backwashing, thus extending their lifespan.

[0016] Furthermore, the cleaning brush is axially slidable and circumferentially fixed to the collection rack, and filter screen one and filter screen two are respectively axially slidable and circumferentially rotated to the collection rack.

[0017] The cleaning brush can rotate synchronously with the collection rack and the sealing rack, resulting in a highly integrated and compact device. The cleaning brush rotates to clean the first and second filters, while the collection rack and the sealing rack rotate to centrifuge and dry the impurities in the collection tank, preventing excessive liquid residue and reducing waste.

[0018] Furthermore, an elastic element extending vertically is provided between the filter screen and the filter canister. When the filter screen moves downward, the elastic element stores the elastic potential energy that drives the filter screen to move upward.

[0019] The elastic element can drive the filter to move automatically upwards without the need for other electronic devices, thus reducing energy consumption.

[0020] Furthermore, a drain pipe is fixed on the filter tank, with one end of the drain pipe located inside the filter tank and the other end located outside the filter tank. A liquid permeation hole is provided on the side wall of the drain pipe located inside the filter tank, and the bottom end of the liquid permeation hole is not higher than the lowest point of the inner wall of the filter tank.

[0021] The drain pipe can drain all the liquid in the filter canister, making it convenient to inspect and clean the filter canister.

[0022] A filtration method for producing scale and corrosion inhibitors, using the aforementioned filtration device for producing scale and corrosion inhibitors, includes the following steps:

[0023] S1. The scale and corrosion inhibitor is fed into the filter canister, filtered through filter screen one and filter screen two, and then sent out of the filter canister.

[0024] S2. The collection rack and filter screen 1 move downwards at the same acceleration. The liquid below filter screen 1 impacts filter screen 1, causing impurities to separate from filter screen 1. The liquid carrying impurities passes through liquid permeation hole 2 and enters the collection tank.

[0025] S3. The collection rack and filter screen move upwards, and the liquid in the collection tank is filtered by filter holes three and four, while impurities remain in the collection tank.

[0026] Repeat steps S2 and S3 to clean filter one.

[0027] The moving frame and filter screen 1 move downwards synchronously and accelerate. The original scale and corrosion inhibitor in the filter tank backwashes and cleans filter screen 1, eliminating the need to introduce other flushing agents and avoiding waste of scale and corrosion inhibitor. The scale and corrosion inhibitor after rinsing filter screen 1 contains filtered solid impurities. The scale and corrosion inhibitor carrying solid impurities moves to the top of liquid permeation hole 2 and is filtered out through filter hole 3 and filter hole 4. The impurities are separated from the scale and corrosion inhibitor, preventing impurities from accumulating on filter screen 1.

[0028] The beneficial effects of this invention are:

[0029] The scale and corrosion inhibitors already in the filter tank are used to impact filter screen one, eliminating the need for backflushing with water or other flushing solutions and avoiding waste of scale and corrosion inhibitors; impurities on filter screen one are collected by the collection tank, allowing them to detach from filter screen one and preventing them from accumulating on it; the cleaning brush cleans filter screen one and filter screen two in real time, reducing the frequency of backflushing and extending the service life of filter screen one and filter screen two. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of the filter tank;

[0032] Figure 3 This is a schematic diagram of the installation structure of filter screen one, filter screen two, collection rack and sealing rack;

[0033] Figure 4 This is a schematic diagram of the installation structure of drive motor one;

[0034] Figure 5 This is a schematic diagram of the collection rack structure;

[0035] Figure 6 This is a schematic diagram of the enclosed frame structure;

[0036] Figure 7 This is a schematic diagram of the installation structure of guide rod three.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Filter module; 11. Filter tank; 12. Filter screen one; 13. Cylinder; 14. End cap; 15. Fixing base; 16. Feed pipe; 17. Discharge pipe; 18. Drain pipe; 19. Liquid permeation hole one; 110. Filter hole one; 111. Guide tube one; 112. Guide rod one; 113. Elastic component one; 114. Mounting bracket one; 116. Guide rod two; 117. Elastic component two; 118. Filter screen two; 119. Filter hole two; 120. Guide tube two;

[0039] 2. Cleaning Module 1; 21. Collection Rack; 22. Liquid Baffle; 23. Filter Plate; 24. Liquid Permeable Plate; 25. Connecting Plate 1; 26. Filter Hole 3; 27. Filter Hole 4; 28. Liquid Permeable Hole 2; 29. ​​Moving Frame; 210. Linear Actuator; 211. Vertical Rod; 212. Support Rod; 213. Mounting Frame 2; 214. Enclosure Frame; 215. Enclosure Plate 1; 216. Enclosure Plate 2; 217. Connecting Plate 2; 218. Enclosure Plate 3; 219. Liquid Permeable Hole 3; 220. Clearance Hole 1; 221. Clearance Hole 2; 222. Drive Motor 1; 223. Gear 1; 224. Gear 2;

[0040] 3. Cleaning Module Two; 31. Cleaning Brush; 32. Brush Body; 33. Brush Bristle; 34. Drive Motor Two; 35. Gear Three; 36. Gear Four; 37. Guide Rod Three; 38. Rotary Bearing One; 39. Rotary Bearing Two; 310. Rotary Bearing Three; 311. Rotary Bearing Four; 312. Rotary Bearing Five; 313. Rotary Bearing Six; 314. Rotary Bearing Seven; 315. Rotary Bearing Eight; 316. Rotary Bearing Nine. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only a part of the embodiments disclosed in this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of this invention.

[0042] A filtration device for the production of scale and corrosion inhibitors, such as Figure 1 and Figure 2 As shown, it includes a filtration module 1 and a cleaning module 2. The filtration module 1 includes a filter canister 11 and a filter screen 12 disposed in the filter canister 11. The filter screen 12 is used to filter out solid impurities in the scale inhibitor and corrosion inhibitor. The cleaning module 2 is used to clean the filter screen 12 to ensure that the filtration efficiency of the filter screen 12 is at a high level.

[0043] Filter tank 11 includes a cylindrical body 13 and an end cap 14. The cylindrical body 13 is a cylindrical structure that runs vertically through the body. The end cap 14 is used to close the bottom opening of the cylindrical body 13. A fixing seat 15 is mounted on the outer circumference of the filter tank 11 to fix the filter tank 11 to the ground. An inlet pipe 16 and an outlet pipe 17 are provided on the side wall of the cylindrical body 13, with the inlet pipe 16 located above the outlet pipe 17. A drain pipe 18 is provided on the end cap 14, with a portion of the drain pipe 18 located in... Inside the filter tank 11, a portion of the drain pipe 18 extends vertically from the outside of the filter tank 11. A liquid permeation hole 19 is provided on the side wall of the drain pipe 18 inside the filter tank 11. The bottom end of the liquid permeation hole 19 is not higher than the lowest point of the inner bottom surface of the end cap 14, ensuring that all liquid inside the filter tank 11 can be discharged through the drain pipe 18. A valve is installed on the drain pipe 18 inside the filter tank 11 to open or close the drain pipe 18. A guide rod 116 is vertically fixed at the top of the drain pipe 18. A guide tube 120 is fitted onto the top of the guide rod 116. A vertically extending elastic element 117, which is a compression spring, is provided between the inner top surface of the guide tube 120 and the top surface of the guide rod 116.

[0044] The filter screen 12 is arranged horizontally and has multiple vertically penetrating filter holes 110. The outer circumferential surface of the filter screen 12 is in contact with the inner wall of the cylinder 13. The filter screen 12 is located vertically between the feed pipe 16 and the discharge pipe 17. The scale and corrosion inhibitor to be filtered enters the filter tank 11 through the feed pipe 16 and passes through the filter screen 12. Impurities in the scale and corrosion inhibitor are retained on the filter screen 12.

[0045] like Figure 3As shown, filter screen 12 is slidably assembled in filter canister 11 via guide tube 111, guide rod 112, and elastic element 113. Guide tube 111 is a cylindrical structure extending vertically, and there are multiple guide tubes 111. Mounting bracket 114 is fixed on the inner wall of filter canister 11, and multiple guide tubes 111 are fixed on mounting bracket 114 and evenly distributed circumferentially around the axis of cylinder 13. Guide rod 112 is a cylindrical structure extending vertically. The top end of guide rod 112 is fixedly assembled on filter screen 12, and the lower part of guide rod 112 passes through guide tube 111. The outer circumferential surface of guide rod 112 located in guide tube 111 is in contact with the inner wall of guide tube 111. Elastic element 113 is a compression spring that extends vertically. The two ends of elastic element 113 are fixed on the bottom surface of guide rod 112 and the inner wall of guide tube 111, respectively.

[0046] Cleaning module 12 includes a collection rack 21 with filter holes 3 26, filter holes 4 27 and liquid permeation holes 28, a drive mechanism 1 for moving the collection rack 21 up and down, and an opening and closing mechanism for opening and closing filter holes 3 26, filter holes 4 27 and liquid permeation holes 28, as shown in the figure. Figure 3 and Figure 5 The collection rack 21 includes a baffle plate 22, a filter plate 23, a permeable plate 24, and a connecting plate 25. The baffle plate 22 is a cylindrical structure that runs vertically through the base. Multiple filter zones 1 are evenly distributed around the axis of the baffle plate 22 on its outer wall. Each filter zone 1 has horizontally penetrating filter holes 26. The filter plate 23 and the permeable plate 24 are both horizontally arranged annular structures. The filter plate 23 is fixed to the inner wall of the baffle plate 22. Multiple filter zones 25 are evenly distributed circumferentially around the axis of the filter plate 23 on the filter plate 23. Each filter zone 25 has vertically penetrating filter holes 26. Filter hole 27; multiple liquid permeable holes 28 are provided on the liquid permeable plate 24, and the multiple liquid permeable holes 28 are evenly distributed in a circular shape around the axis of the liquid permeable plate 24; the liquid permeable plate 24 is located above the filter plate 23 in the vertical direction, and the outer diameter of the liquid permeable plate 24 is smaller than the inner diameter of the filter plate 23; the connecting plate 25 is a frustum shell structure, and the connecting plate 25 is fixed between the inner circumferential surface of the filter plate 23 and the outer circumferential surface of the liquid permeable plate 24; the baffle plate 22, the filter plate 23, the liquid permeable plate 24 and the connecting plate 25 are all arranged coaxially with the cylinder 13, and the baffle plate 22, the filter plate 23 and the connecting plate 25 form an upward-opening collection trough.

[0047] The drive mechanism includes a movable frame 29 and a linear actuator 210. The movable frame 29 includes a vertical rod 211 and a support rod 212. The vertical rod 211 is a cylindrical structure extending vertically. The vertical rod 211 is coaxially arranged with the cylinder 13. The support rod 212 is fixed on the vertical rod 211. The collection frame 21 is axially fixedly assembled on the movable frame 29. The second mounting frame 213 is fixedly assembled on the cylinder 13. The linear actuator 210 is an electric push rod or a hydraulic rod. The driving direction of the linear actuator 210 is vertical. The fixed end of the linear actuator 210 is fixedly assembled on the second mounting frame 213. The output end of the linear actuator 210 is fixedly connected to the support rod 212.

[0048] Reference Figure 3 and Figure 6 The opening and closing mechanism includes a sealing frame 214 and a drive assembly for rotating the sealing frame 214 around the axis of the cylinder 13. The sealing frame 214 is axially fixedly mounted on the movable frame 29. The sealing frame 214 is located below the collection rack 21. The sealing frame 214 includes a first sealing plate 215, a second sealing plate 216, a second connecting plate 217, and a third sealing plate 218. The top surface of the first sealing plate 215 is in contact with the bottom surface of the liquid permeable plate 24, and the first sealing plate 215 has multiple liquid permeable holes 219 that extend vertically. The top surface of the second sealing plate 216 is in contact with the bottom surface of the filter plate 23. 16 is provided with multiple clearance holes 220; the connecting plate 217 is used to fix the connection between the sealing plate 215 and the sealing plate 216 so that the sealing plate 215 and the sealing plate 216 can rotate synchronously; the sealing plate 218 is a circular structure that runs vertically through the ring. The sealing plate 218 is provided with multiple clearance holes 221. The sealing plate 216 is fixedly connected to the inner circumferential surface of the sealing plate 218. The bottom surface of the sealing plate 218 is located below the bottom surface of the sealing plate 216 in the vertical direction. The inner circumferential surface of the sealing plate 218 is in contact with the outer circumferential surface of the baffle plate 22.

[0049] The drive assembly includes drive motor 222, gear 223, and gear 224. Drive motor 222 is a waterproof motor. Figure 4As shown, drive motor 222 is fixedly mounted on the liquid permeation plate 24. The axis of the output shaft of drive motor 222 extends vertically. Gear 223 is coaxially fixedly mounted on the output shaft of drive motor 222. A brake is mounted on drive motor 222. When drive motor 222 stops running, the output shaft is locked. Gear 224 is coaxially arranged with cylinder 13. Gear 224 is fixedly mounted on sealing plate 215. The liquid permeation plate 24 is provided with a clearance groove for accommodating gear 224. Gear 224 and gear 223... When wheel 1 223 engages, drive motor 1 222 starts and drives the sealing frame 214 to rotate around the axis of cylinder 13; when the sealing frame 214 rotates to the point where sealing plate 1 215 closes liquid permeation hole 28, filter hole 4 27 is located in the vertical direction within clearance hole 1 220, and filter hole 3 26 is located in the radial direction of cylinder 13 within clearance hole 221; when the sealing frame 214 rotates to the point where liquid permeation hole 28 and liquid permeation hole 3 219 are vertically opposite each other, sealing plate 216 closes filter hole 4 27, and sealing plate 3 218 closes filter hole 3 26.

[0050] The usage method of cleaning module 12 is as follows:

[0051] Start drive motor 222 to drive collection rack 21 to rotate by a predetermined angle, so that liquid permeation hole 28 and liquid permeation hole 219 are vertically aligned. At this time, sealing plate 216 closes filter hole 27 and sealing plate 218 closes filter hole 26. Linear actuator 210 drives moving frame 29 to move down a predetermined distance and then stops. At this time, the bottom surface of sealing plate 218 contacts filter screen 12. Linear actuator 210 drives moving frame 29 to move down a predetermined distance, and moving frame 29 drives filter screen 12 to move down synchronously, and elastic element 113 is compressed. When filter screen 12 starts to move and accelerates, the liquid below filter screen 12 is compressed, the pressure below filter screen 12 increases, and the pressure above filter screen 12 decreases. This pressure difference causes the liquid to flow upward relative to filter screen 12, thus compressing the filter screen. Impurities on filter screen 12 are carried away, and the liquid carrying impurities passes through liquid permeation holes 28 and 219 and is located above liquid permeation plate 24. Drive motor 222 starts, and sealing frame 214 rotates at a predetermined angle, causing liquid permeation holes 28 and 219 to be vertically offset. Sealing plate 215 closes liquid permeation hole 28, so that the liquid carrying impurities is trapped above liquid permeation plate 24. Filter hole 27 is located vertically within clearance hole 220, and filter hole 26 is located radially within clearance hole 221 of cylinder 13. Linear actuator 210 drives moving frame 29 to move upward, and the liquid above liquid permeation plate 24 is filtered by filter holes 26 and 27. Impurities remain in collection tank, and filter screen 12 moves upward under the elastic potential energy of elastic element 113. After repeating the above steps several times, the staff cleans the impurities in the collection tank.

[0052] To improve filtration efficiency, a second filter screen 118 is fixed inside the filter tank 11. The second filter screen 118 is located below the first filter screen 12. The second filter screen 118 has a filter hole 119 that runs vertically through it. The diameter of the filter hole 119 is smaller than that of the first filter hole 110. The diameters of the third filter hole 26 and the fourth filter hole 27 are not larger than that of the second filter hole 119.

[0053] In order to reduce the impact frequency on filter screen 12 and extend the service life of filter screen 12, a second cleaning module 3 is provided in the filter canister 11. The second cleaning module 3 includes a cleaning brush 31 and a second driving mechanism for driving the cleaning brush 31 to rotate. There are two sets of cleaning brushes 31. The cleaning brush 31 includes a brush body 32 and bristles 33 fixed below the brush body 32. The bristles 33 extend vertically, and the bottom ends of the bristles 33 contact the top surfaces of filter screen 12 and filter screen 2 118 respectively.

[0054] A rotating bearing 38 is installed between the support rod 212 and the baffle plate 22, a rotating bearing 39 is installed between the liquid permeation plate 24 and the vertical rod 211, and a rotating bearing 310 is installed between the sealing plate 215 and the vertical rod 211, so that the collection frame 21 and the sealing frame 214 are axially fixed and circumferentially rotated on the movable frame 29.

[0055] The second drive mechanism includes a second drive motor 34 and a transmission assembly located between the output shaft of the second drive motor 34 and the brush body 32. The second drive motor 34 is a servo motor or a stepper motor. The second drive motor 34 is fixedly mounted on the support rod 212. The output shaft of the second drive motor 34 extends vertically. The transmission assembly includes a third gear 35, a fourth gear 36, and a third guide rod 37. The third gear 35 is an external gear and is coaxially fixedly mounted on the output shaft of the second drive motor 34. The fourth gear 36 is an internal gear and is fixedly mounted on the inner circumferential surface of the baffle plate 22 and is coaxial with the baffle plate 22. The fourth gear 36 meshes with the third gear 35. When the second drive motor 34 starts, the collection rack 21 rotates around the axis of the cylinder 13 under the drive of the third gear 35 and the fourth gear 36. To prevent the rotation of the collection rack 21 from adversely affecting the installation of the drive motor 222, a waterproof battery can be fixedly mounted on the liquid permeable plate 24. The waterproof battery supplies power to the drive motor 222, and the start and stop of the drive motor 222 are controlled by wireless signals.

[0056] The brush body 32 corresponding to the bristles 33 in contact with filter screen 12 is axially fixed and circumferentially rotatable on guide tube 120 via rotating bearing 4 311. The brush body 32 corresponding to the bristles 33 in contact with filter screen 2 118 is axially fixed and circumferentially rotatable on guide rod 2 116 via rotating bearing 5 312. Figure 7As shown, guide rod 37 is a cylindrical structure extending vertically. There are five guide rods 37, which are evenly distributed circumferentially around the axis of cylinder 13. The guide rods 37 are fixedly assembled on the closed frame 214. In this embodiment, the top end of the guide rod 37 can be fixedly assembled with the outer ring of the rotating bearing 310. The outer rings of the rotating bearings 411 and 512 are both provided with guide holes 1 that are adapted to the guide rods 37. Filter screen 12 is connected to guide tube 2 120 through rotating bearing 613 and rotating bearing 714. The outer ring of rotating bearing 613 is fixedly connected to filter screen 12, and the outer ring of rotating bearing 714 is fixedly connected to rotating bearing 613. The inner ring of bearing 313 is fixedly connected to the inner ring of bearing 7 314, and the inner ring of bearing 6 313 is provided with a guide hole 2 that is compatible with guide rod 37; filter screen 2 118 is connected to guide rod 2 116 through bearing 8 315 and bearing 9 316, the outer ring of bearing 8 315 is fixedly connected to filter screen 2 118, the inner ring of bearing 8 315 is fixedly connected to the outer ring of bearing 9 316, the inner ring of bearing 9 316 is fixedly connected to guide rod 2 116, the inner ring of bearing 8 315 is provided with a guide hole 3 that is compatible with guide rod 37, and guide rod 37 is inserted into guide hole 1, guide hole 2 and guide hole 3.

[0057] The cleaning brush 31 is used as follows: when impurities accumulate on filter screen 12 and filter screen 218, start drive motor 24. The collection rack 21, the sealing rack 214 and the two cleaning brushes 31 rotate synchronously around the axis of the cylinder 13, and the bristles 33 clean filter screen 12 and filter screen 218.

[0058] The usage method of scale and corrosion inhibitor devices is as follows:

[0059] Drive motor 24 is started, and cleaning brush 31 rotates to clean filter screens 12 and 118. When the filtration efficiency of filter screen 12 decreases, drive motor 222 is started, and the sealing frame 214 rotates by a predetermined angle, so that the liquid permeation hole 28 and the liquid permeation hole 219 are vertically aligned. The sealing plate 216 closes the filter hole 27, and the sealing plate 218 closes the filter hole 26. The linear actuator 210 drives the moving frame 29, the collecting frame 21, the sealing frame 214, and the guide rod 37 to move downwards synchronously. When the bottom surface of the sealing plate 218 contacts the top surface of filter screen 12, the linear actuator 210 stops running. Then, the linear actuator 210 restarts and extends a predetermined distance, and the speed of filter screen 12 rapidly increases from zero to a predetermined speed. Then, the liquid containing impurities moves to the top of the liquid permeation plate 24 after passing through the liquid permeation hole 28 and the liquid permeation hole 219. The drive motor 222 is started in reverse, and the drive motor 222 drives the sealing frame 214 to rotate in the opposite direction by a predetermined angle, so that the sealing plate 215 seals the liquid permeation hole 28. The filter hole 27 is located in the vertical direction within the clearance hole 220, and the filter hole 26 is located in the radial direction of the cylinder 13 within the clearance hole 221. The linear actuator 210 drives the moving frame 29, the collecting frame 21, the sealing frame 214 and the guide rod 37 to move upward synchronously. During the upward movement, the liquid is filtered by the filter hole 26 and the filter hole 27, and the impurities remain in the collecting tank. The filter screen 12 moves upward under the action of the elastic potential energy of the elastic element 113.

[0060] A filtration method for producing scale and corrosion inhibitors, using the aforementioned filtration device for producing scale and corrosion inhibitors, includes the following steps:

[0061] S1. The linear actuator 210 drives the moving frame 29, the collecting frame 21 and the closing frame 214 to move upward to the predetermined position, and sends the scale inhibitor and corrosion inhibitor into the filter tank 11 through the feed pipe 16. The scale inhibitor and corrosion inhibitor passes downward through the filter screen 12 and the filter screen 218. Impurities that are insoluble in water remain on the filter screen 12 and the filter screen 218. The scale inhibitor and corrosion inhibitor that has been filtered is sent out of the filter tank 11 through the discharge pipe 17.

[0062] S2. After the predetermined filtration time, drive motor 222 is started. Drive motor 222 drives the sealing frame 214 to rotate by a predetermined angle, so that the liquid permeation hole 28 and the liquid permeation hole 3 219 are vertically aligned. The sealing plate 216 closes the filter hole 4 27, and the sealing plate 3 218 closes the filter hole 3 26. The linear actuator 210 is started, driving the collection frame 21 and the sealing frame 214 to move downward until the sealing plate 3 218 contacts the filter screen 12. Then, the linear actuator 210 drives the collection frame 21, the sealing frame 214, and the filter screen 12 to synchronously accelerate and move downward a predetermined distance. The liquid below 12 impacts the filter screen 12, causing impurities to separate from the filter screen 12. The liquid carrying impurities passes through the liquid permeation hole 28 and the liquid permeation hole 319 and moves to the top of the liquid permeation plate 24. The drive motor 1222 is started in reverse. The drive motor 1222 drives the sealing frame 214 to rotate in the opposite direction by a predetermined angle, so that the sealing plate 1215 seals the liquid permeation hole 28. The filter hole 427 is located in the vertical direction within the clearance hole 120, and the filter hole 326 is located in the radial direction of the cylinder 13 within the clearance hole 221. The liquid carrying impurities remains above the liquid permeation plate 24 and is located in the collection tank.

[0063] S3, the linear actuator 210 drives the collection rack 21 to move upward, and the liquid carrying impurities is filtered through filter hole three 26 and filter hole four 27, and the impurities remain in the collection tank;

[0064] Repeat steps S2 and S3 to clean filter 12.

Claims

1. A filtration device for producing scale and corrosion inhibitors, comprising a filter tank and a filter screen horizontally arranged inside the filter tank, the filter screen having vertically penetrating filter holes for filtering impurities in the scale and corrosion inhibitor, characterized in that, A filter screen is slidably mounted inside a filter tank. The filter tank contains a collection rack with a second liquid permeation hole, a collection trough, and a third filter hole. The bottom of the collection trough forms a concave frustum-shaped shell structure. The second liquid permeation hole is vertically located above the bottom surface of the collection trough. The third filter hole is located on the side wall of the collection trough. The collection rack is positioned above the filter screen and slides vertically within the filter tank. When the collection rack and filter screen move downwards synchronously, the liquid below the filter screen impacts the filter screen, causing impurities to detach from it. The liquid carrying impurities passes through the second liquid permeation hole and enters the collection trough. When the collection rack moves upwards, the liquid in the collection trough is filtered by the third filter hole, leaving the impurities in the collection trough. The filter tank is equipped with a sealing frame located below the collection frame. The sealing frame and the collection frame are axially fixed and circumferentially rotatable. The sealing frame has three liquid permeation holes and two clearance holes. When the sealing frame rotates to the point where the three liquid permeation holes are connected to the two liquid permeation holes, the sealing frame closes the three filter holes, and the liquid carrying impurities passes upward through the two liquid permeation holes and the three liquid permeation holes and enters the collection tank. When the sealing frame rotates to the point where the three liquid permeation holes are offset from the two liquid permeation holes, the sealing frame closes the two liquid permeation holes, and the three filter holes are connected to the two clearance holes, and the liquid carrying impurities is filtered through the three filter holes. The collection rack is provided with filter hole four, which is located on the inner bottom surface of the collection tank. The sealing rack is provided with clearance hole one. When the sealing rack is rotated to the point where liquid permeation hole two and liquid permeation hole three are connected, the sealing rack will close filter hole four. When the sealing rack is rotated to the point where liquid permeation hole two and liquid permeation hole three are misaligned, filter hole four and clearance hole one are connected. The filter tank is equipped with a sliding frame that slides up and down. The collection frame and the sealing frame are axially fixed and circumferentially rotated on the vertical rod. When the sealing frame closes the liquid permeation hole two or when the liquid permeation hole two is connected to the liquid permeation hole three, the collection frame and the sealing frame are relatively fixed. An elastic element extending vertically is provided between the filter screen and the filter canister. When the filter screen moves downward, the elastic element stores the elastic potential energy that drives the filter screen to move upward. It also includes: a drive mechanism for driving the collection rack to move up and down; the drive mechanism includes a movable frame and a linear actuator. The movable frame includes a vertical rod and a support rod. The vertical rod is a cylindrical structure that extends up and down. The vertical rod is arranged coaxially with the cylinder. The support rod is fixed on the vertical rod. The collection rack is axially fixedly assembled on the movable frame.

2. The filtration device for producing scale and corrosion inhibitors according to claim 1, characterized in that, The filter tank is equipped with a horizontally arranged filter screen two, which is located below the filter screen one. The filter screen two has a filter hole two that runs vertically through it. The diameter of the filter hole two is smaller than that of the filter hole one, and the diameters of the filter hole three and filter hole four are not larger than that of the filter hole two.

3. The filtration device for producing scale and corrosion inhibitors according to claim 2, characterized in that, A cleaning brush is provided above both filter screen one and filter screen two. The cleaning brush includes bristles for contacting filter screen one and filter screen two. The cleaning brush is mounted inside the filter canister and rotates around a vertical axis.

4. A filtration device for producing scale and corrosion inhibitors according to claim 3, characterized in that, The cleaning brush is axially sliding and circumferentially fixed to the collection rack, and filter screen one and filter screen two are respectively axially sliding and circumferentially rotating to the collection rack.

5. A filtration device for producing scale and corrosion inhibitors according to claim 4, characterized in that, A drain pipe is fixed on the filter tank. One end of the drain pipe is located inside the filter tank, and the other end is located outside the filter tank. A liquid permeation hole is provided on the side wall of the drain pipe inside the filter tank. The bottom end of the liquid permeation hole is not higher than the lowest point of the inner wall of the filter tank.

6. A filtration method for producing scale and corrosion inhibitors, comprising using the filtration apparatus for producing scale and corrosion inhibitors as described in any one of claims 2-5, characterized in that, Includes the following steps: S1. The scale and corrosion inhibitor is fed into the filter canister, filtered through filter screen one and filter screen two, and then sent out of the filter canister. S2. The collection rack and filter screen 1 move downwards at the same acceleration. The liquid below filter screen 1 impacts filter screen 1, causing impurities to separate from filter screen 1. The liquid carrying impurities passes through liquid permeation hole 2 and enters the collection tank. S3. The collection rack and filter screen move upwards, and the liquid in the collection tank is filtered by filter holes three and four, while impurities remain in the collection tank. Repeat steps S2 and S3 to clean filter one.

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