Wet-process phosphoric acid filtering device

Abstract

The utility model relates to a wet-process phosphoric acid filtering device which comprises a filtering cylinder, a feeding pipe is connected to the upper end of the filtering cylinder, supporting legs are fastened to the triangle of the bottom of the filtering cylinder through bolts, a discharging opening is formed in the bottom of the filtering cylinder, the lower end of the front side of the filtering cylinder is communicated with a discharging pipe, and the outer side of the discharging pipe is connected with a collecting box. The efficient filter device is arranged in the filter cartridge; the efficient filtering device comprises a material guiding shell arranged in the filtering cylinder, a motor arranged on one side in the material guiding shell, a driving wheel connected to the output end of the motor, a flexible filtering net in transmission connection to the outer side of the driving wheel, a driven wheel connected to the other side of the flexible filtering net and a through opening formed in the outer side of the flexible filtering net; the connecting shell is fixedly arranged at the lower end of the material guiding shell and connected with the inlet end of the discharging pipe, the first scraping assembly is installed on the outer side of the flexible filter screen, and the second scraping assembly is arranged in the material guiding shell. The efficient filtering device is arranged, the flexible filter screen makes contact with the first scraping assembly when rotating, scraping and cleaning of impurities attached to the outer side are achieved, and by arranging the second scraping assembly, the advantage that convenient filtering and scraping and cleaning are matched is achieved.

Description

Technical Field

[0001] The utility model relates to the relevant field of wet process phosphoric acid production, in particular to a wet process phosphoric acid filtering device. Background Art

[0002] Phosphoric acid produced by decomposing phosphate rock with sulfuric acid, nitric acid or hydrochloric acid is collectively called wet-process phosphoric acid. Wet-process phosphoric acid is an important intermediate product in phosphorus chemical industry and is often used in the production of fertilizers. Due to the characteristics of raw materials and processes, wet-process phosphoric acid contains some impurities. In order to make the phosphoric acid quality meet the requirements, the wet-process phosphoric acid needs to be purified and filtered.

[0003] The existing application number is CN202120486703.5, which is a novel impurity removal device for wet-process phosphoric acid production, including an impurity removal box, two brackets are symmetrically installed on the left and right sides of the impurity removal box, and the bottoms of the two brackets are connected to a base. A measuring cylinder with a solid feed pipe connected to the bottom is installed on the top surface of the impurity removal box, a liquid feed pipe is connected to the upper left side of the impurity removal box, and a flow meter is installed on the liquid feed pipe. A motor is installed in the middle of the bottom surface of the impurity removal box, and the output shaft of the motor is connected to a rotating shaft with two stirring blades symmetrically installed on the circumferential surface. Two heating plates are symmetrically installed on the left and right side walls of the inner cavity of the impurity removal box, a filtering mechanism and a collecting box are installed on the base, a material guide pipe is connected between the top of the filtering mechanism and the bottom of the impurity removal box, and a slag discharge pipe is connected between the left side of the filtering mechanism and the top of the collecting box. The utility model has reasonable structure, simple operation, good impurity removal effect on wet-process phosphoric acid, and broad application prospects.

[0004] In the above-mentioned existing impurity removal device, a filtering mechanism is provided to filter the solution of wet-process phosphoric acid and flocculant after the mixing activity is completed, so as to achieve auxiliary filtration of wet-process phosphoric acid. However, the sieve plate provided inside the filtering mechanism needs to be disassembled and replaced after being used for a period of time, and the overall filtering performance is low. Secondly, the cleaning efficiency of impurities filtered on the outside of the sieve plate is low, and a certain amount of time is required to clean the impurities, resulting in a significant reduction in the overall filtration efficiency of the wet-process phosphoric acid. Utility Model Content

[0005] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a wet-process phosphoric acid filtering device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a wet-process phosphoric acid filtering device, comprising a filter cartridge, the upper end of the filter cartridge is connected to a feed pipe, and the bottom triangle of the filter cartridge is bolted with a supporting leg, the bottom of the filter cartridge is provided with a discharge port, the lower end of the front side of the filter cartridge is connected to a discharge pipe, and the outer side of the discharge pipe is connected to a collection box, and also includes a high-efficiency filtering device arranged inside the filter cartridge, the high-efficiency filtering device includes a material guide shell installed inside the filter cartridge, a motor installed on one side of the material guide shell, a driving wheel connected to the output end of the motor, a flexible filter screen transmission-connected to the outer side of the driving wheel, a driven wheel connected to the other side of the flexible filter screen, a through port opened on the outer side of the flexible filter screen, a connecting shell fixedly arranged at the lower end of the material guide shell and connected to the inlet end of the discharge pipe, a first scraping assembly installed on the outer side of the flexible filter screen, and a second scraping assembly arranged inside the material guide shell.

[0007] Preferably, the first scraping assembly includes a connecting frame fixedly arranged on one side of the inner part of the material guide shell, a scraping strip rotatably connected to the lower end of the connecting frame, a connecting strip fixedly arranged on the side of the scraping strip, a movable frame inserted into the inner part of the connecting strip and extending downward, a screw rod threadedly connected to the lower end of the movable frame, a micro motor connected to the bottom of the screw rod, and support rods inserted into both sides of the lower end of the movable frame.

[0008] Preferably, the second scraper assembly includes a connecting rod arranged on one side of the material guide shell, a locking shaft passing through the upper end of the connecting rod and threadedly locked with the inside of the material guide shell, a fastening shell sleeved on the lower end of the connecting rod, a compression spring built into the fastening shell, and a cleaning plate fixed to the lower end of the fastening shell.

[0009] Preferably, the upper end of the material guide shell is opened in the shape of an inverted truncated cone groove as a whole, and a connecting shell is fixedly provided at the bottom of the material guide shell close to the opening end of the discharge pipe.

[0010] Preferably, the connecting frame is correspondingly sleeved on the outside of the driving wheel, and the scraper strip provided on the bottom of the connecting frame is in contact with the outside of the flexible filter screen.

[0011] Preferably, the movable frame is arranged as a whole in a transverse T-shaped frame, and the middle part of the lower end of the movable frame is threadedly connected with the screw rod.

[0012] Preferably, two support rods are symmetrically installed along the lower end of the connecting frame, and the support rods on both sides are slidably docked with the two sides of the bottom of the movable frame.

[0013] Preferably, the cleaning plate is arranged in an inclined plate shape as a whole, and the scraping end at the bottom of the cleaning plate is in contact with the inner side of the flexible filter screen.

[0014] Beneficial effects of the utility model:

[0015] Advantage 1: The utility model is provided with a high-efficiency filtering device, that is, the flexible filter screen can be rotated by cooperating with the driving wheel and the driven wheel to achieve flexible and efficient filtering. When the flexible filter screen rotates, it will contact the scraping strip provided inside the first scraping component to achieve scraping and cleaning of impurities attached to the outside. In addition, the threaded transmission of the screw rod and the movable frame can flexibly adjust the tightness of the scraping strip, thereby achieving the advantages of convenient filtration and scraping cleaning of wet phosphoric acid.

[0016] Advantage 2: The utility model is provided with two scraping components, that is, the cleaning plate can be in contact with the inner side of the flexible filter to scrape and clean the impurities attached to the inner side of the flexible filter, and cooperate with the opening opened on the outer side of the flexible filter to achieve rapid scraping and discharge of the impurities on the inner side, thereby achieving the advantage of auxiliary scraping and cleaning of impurities attached to the inner side of the flexible filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model from the right side;

[0019] Figure 3 It is a right side cross-sectional structural schematic diagram of the high-efficiency filtering device of the utility model;

[0020] Figure 4 It is a right side cross-sectional structural diagram of the first scraping assembly of the utility model;

[0021] Figure 5 It is a right view structural schematic diagram of the second scraping component of the utility model.

[0022] Among them: filter cartridge-1, feed pipe-2, support leg-3, discharge port-4, discharge pipe-5, collection box-6, high-efficiency filter device-7, material guide shell-71, motor-72, driving wheel-73, flexible filter screen-74, driven wheel-75, through-port-76, connecting shell-77, first scraping assembly-78, connecting frame-781, scraping strip-782, connecting strip-783, moving frame-784, screw-785, micro motor-786, support rod-787, second scraping assembly-79, connecting rod-791, locking shaft-792, fastening shell-793, compression spring-794, cleaning plate-795. DETAILED DESCRIPTION

[0023] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0024] See also Figure 1-2The utility model provides a wet-process phosphoric acid filtering device, including a filter cartridge 1, a feed pipe 2 is connected to the upper end of the filter cartridge 1, and a support leg 3 is fastened with a triangular bolt at the bottom of the filter cartridge 1, a discharge port 4 is opened at the bottom of the filter cartridge 1, a discharge pipe 5 is connected to the lower end of the front side of the filter cartridge 1, and a collection box 6 is connected to the outer side of the discharge pipe 5, and also includes a high-efficiency filtering device 7 arranged inside the filter cartridge 1.

[0025] See also Figure 3 The high-efficiency filtering device 7 in this embodiment includes a guide shell 71 installed inside the filter cartridge 1, a motor 72 installed on the right side of the guide shell 71 to achieve drive cooperation, a driving wheel 73 installed on the right side of the guide shell 71 and connected to the front output end of the motor 72, a flexible filter screen 74 that is transmission-connected to the outside of the driving wheel 73, and the flexible filter screen 74 is arranged in a transmission belt shape as a whole, so as to meet the filtering cooperation and subsequent transmission adjustment cooperation, a driven wheel 75 that is transmission-connected to the left side of the flexible filter screen 74 and rotationally connected to the left side of the guide shell 71, and a corresponding opening at the lower end of the flexible filter screen 74 The through opening 76 on the left side is used to cooperate with the through opening 76 to discharge impurities attached to the inner side of the flexible filter screen 74. A corresponding connecting shell 77 is fixedly connected to the lower end of the guide shell 71 and connected to the inlet end of the discharge pipe 5, and the inner wall of the connecting shell 77 is opened in a smooth inclined surface as a whole, so that efficient conduction and collection of impurities can be achieved. A first scraper component 78 is installed on the outer end of the left side of the flexible filter screen 74 to scrape and clean the impurities attached to the outside. A second scraper component 79 is installed on the left side of the guide shell 71 and is located on the left side of the flexible filter screen 74 to scrape and clean the impurities inside the flexible filter screen 74.

[0026] The upper end of the guide shell 71 is opened in an inverted truncated cone groove shape, and a connecting shell 77 is fixedly provided at the bottom of the opening end of the discharge pipe 5 to ensure that the guide shell 71 is combined with the connecting shell 77 to achieve auxiliary conduction and collection of attached impurities.

[0027] See also Figure 4 The first scraping assembly 78 in this embodiment includes a connecting frame 781 that is correspondingly and firmly connected to the left side of the guide shell 71, and the connecting frame 781 is arranged in an inverted door-shaped frame shape as a whole, a scraping strip 782 that is correspondingly rotatably connected to the lower end of the connecting frame 781, a connecting strip 783 that is laterally fixedly connected to the right side of the scraping strip 782 and has a long hollow interior, and a moving frame 784 that is transmission-connected to the outer side of the connecting strip 783 and extends downward. In this way, the upper end of the moving frame 784 can be stably combined and docked with the long hollow part opened in the connecting strip 783, a screw rod 785 that is correspondingly threadedly connected to the lower end of the moving frame 784, a micro motor 786 connected to the bottom of the screw rod 785, and support rods 787 that are symmetrically plugged into the left and right sides of the lower end of the moving frame 784 to achieve auxiliary support and mobile guide cooperation.

[0028] Specifically, the connecting frame 781 is correspondingly sleeved on the outside of the driving wheel 73, and the scraper strip 782 arranged at the bottom of the connecting frame 781 is in contact with the outside of the flexible filter screen 74, ensuring that the scraper strip 782 can assist in scraping and cleaning the impurities attached to the outside of the flexible filter screen 74; the movable frame 784 is arranged as a whole in a horizontal T-shaped frame, and the middle part of the lower end of the movable frame 784 is threadedly connected with the screw rod 785, ensuring that the screw rod 785 is threadedly connected with the movable frame 784 to assist in adjusting the tightness of the scraper strip 782; two support rods 787 are symmetrically installed along the inside of the lower end of the connecting frame 781, and the support rods 787 on both sides are slidably connected with the two sides of the bottom of the movable frame 784, ensuring that the upward and downward adjustment driving process of the movable frame 784 can be stable in cooperation with the support rods 787 on both sides.

[0029] See also Figure 5 The second scraper assembly 79 in this embodiment includes a connecting rod 791 installed on the left side of the guide shell 71, a locking shaft 792 passing through the upper end of the connecting rod 791 and threadedly locked with the left side of the guide shell 71, so that the connecting rod 791 as a whole can achieve stable combined docking activities, a corresponding fastening shell 793 sleeved on the outer side of the lower end of the connecting rod 791, a corresponding compression spring 794 built into the fastening shell 793 and abutting against the lower end of the connecting rod 791, and a corresponding cleaning plate 795 fixedly connected to the lower end of the fastening shell 793 to achieve auxiliary scraping and cleaning cooperation.

[0030] To further explain, the cleaning plate 795 is arranged in an inclined plate shape as a whole, and the scraping end at the bottom of the cleaning plate 795 is in contact with the inner side of the flexible filter 74, so that impurities attached to the inner side of the flexible filter 74 can be scraped and cleaned, ensuring that scraping and cleaning activities can be achieved on both the inside and outside of the flexible filter 74.

[0031] Here’s how it works:

[0032] When filtering wet-process phosphoric acid, a mixed solution of wet-process phosphoric acid and flocculant can be introduced from the feed pipe 2 into the filter cartridge 1 to connect with the high-efficiency filtering device 7 provided inside the filter cartridge 1. That is, the flexible filter screen 74 installed inside the high-efficiency filtering device 7 can be inserted into the solution inside the filter cartridge 1 to filter and purify the solution. The liquid that has completed the filtering activity can be discharged and collected along the discharge port 4 provided at the bottom of the filter cartridge 1.

[0033] When it is necessary to clean and collect impurities filtered on the outside of the flexible filter screen 74, the motor 72 provided on the right side of the guide shell 71 can be driven to drive the driving wheel 73 connected to the front output end of the motor 72. When the driving wheel 73 rotates, the flexible filter screen 74 connected to the outside of the driving wheel 73 can rotate along a counterclockwise trajectory and cooperate with the driven wheel 75 connected to the left side of the flexible filter screen 74 to achieve stable counterclockwise transmission. When the flexible filter screen 74 rotates, the impurities blocked on the outside of the flexible filter screen 74 will be filtered and blocked by the first scraping component 7 installed on the outside of the driving wheel 73. 8, so that the first scraping assembly 78 performs a scraping and cleaning activity on the outer impurities, that is, the scraping strip 782 provided inside the first scraping assembly 78 can be in contact with the outer side of the flexible filter screen 74, and the impurities outside the flexible filter screen 74 can be scraped by the scraping strip 782 when the flexible filter screen 74 rotates counterclockwise, so as to achieve convenient scraping and cleaning, and the impurities scraped off can fall into the inside of the connecting shell 77 provided at the lower end of the left side of the guide shell 71, and enter the inside of the discharge pipe 5 along the connecting shell 77, and finally be collected into the collection box 6 through the discharge pipe 5, thereby achieving the advantages of convenient filtration and scraping cleaning of wet-process phosphoric acid;

[0034] Secondly, when the tightness of the scraper strip 782 needs to be adjusted, the micro motor 786 provided inside the lower end of the connecting frame 781 can be driven to rotate the screw rod 785 connected at the top. The screw rod 785 rotates downward to realize the downward transmission of the top threaded connecting frame 784. In this way, the moving frame 784 will cooperate with the support rods 787 plugged on both sides of the bottom to pull the top transmission connecting strip 783, so that the connecting strip 783 will lift the scraper strip 782, so as to strengthen the tightness between the scraper strip 782 and the outer side of the flexible filter screen 74, and enhance the scraping and cleaning effect of impurities.

[0035] At the same time, when the solution contacts and filters the flexible filter screen 74, some impurities will adhere to the inner side of the flexible filter screen 74. In order to avoid clogging of the inner side of the flexible filter screen 74, which would reduce the filtration efficiency, a second scraper assembly 79 is provided on the left side of the guide shell 71 to make the flexible filter screen 74 contact with the bottom of the cleaning plate 795 when it rotates counterclockwise, so that the cleaning plate 795 assists in scraping and cleaning the impurities attached to the inner side of the flexible filter screen 74. When the flexible filter screen 74 rotates one circle and the opening on the flexible filter screen When the through opening 76 on the outside of 74 is opposite to the lower end of the cleaning plate 795, the impurities loosened by the cleaning plate 795 can fall into the inside of the connecting shell 77 from the through opening 76 to complete the auxiliary scraping and cleaning of the impurities attached to the inner side of the flexible filter screen 74. In addition, under the elastic force of the compression spring 794 provided inside the fastening shell 793, the tightness between the cleaning plate 795 and the inner side of the flexible filter screen 74 can be strengthened to ensure the stability of the scraping and cleaning state of the inner side, thereby achieving the advantage of auxiliary scraping and cleaning of the impurities attached to the inner side of the flexible filter screen 74.

[0036] Furthermore, under the transmission of the driving wheel 73 and the driven wheel 75, the filtering position of the flexible filter 74 can be conveniently adjusted to achieve flexible filtering coordination, thereby reducing clogging at the filtering point and causing a decrease in filtering efficiency.

[0037] The utility model provides a wet phosphoric acid filtering device, which is provided with a high-efficiency filtering device 7, that is, in cooperation with the driving wheel 73 and the driven wheel 75, the flexible filter screen 74 can be rotated to achieve flexible and efficient filtering cooperation, and when the flexible filter screen 74 rotates, it will contact with the scraping strip 782 provided inside the first scraping component 78 to achieve scraping and cleaning of impurities attached to the outside, and in cooperation with the threaded transmission of the screw rod 785 and the movable frame 784, the tightness of the scraping strip 782 can be flexibly adjusted, thereby achieving the advantages of convenient filtering and scraping and cleaning of wet phosphoric acid, and a second scraping component 79 is provided, that is, a cleaning plate 795 can contact with the inner side of the flexible filter screen 74 to scrape and clean the impurities attached to the inner side of the flexible filter screen 74, and cooperate with the opening 76 opened on the outer side of the flexible filter screen 74 to achieve rapid scraping and discharge of the impurities on the inner side, thereby achieving the advantage of auxiliary scraping and cleaning of the impurities attached to the inner side of the flexible filter screen 74.

[0038] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wet-process phosphoric acid filtering device, comprising a filter cartridge (1), wherein the upper end of the filter cartridge (1) is connected to a feed pipe (2), and a support leg (3) is fastened to the bottom of the filter cartridge (1) by means of a triangular bolt, a discharge port (4) is provided at the bottom of the filter cartridge (1), a discharge pipe (5) is connected to the lower end of the front side of the filter cartridge (1), and a collection box (6) is connected to the outer side of the discharge pipe (5); Features: The invention also comprises a high-efficiency filtering device (7) arranged inside the filter cartridge (1), the high-efficiency filtering device (7) comprising a material guide shell (71) installed inside the filter cartridge (1), a motor (72) installed on one side inside the material guide shell (71), a driving wheel (73) connected to the output end of the motor (72), a flexible filter screen (74) drivingly connected to the outside of the driving wheel (73), a driven wheel (75) connected to the other side of the flexible filter screen (74), a through hole (76) opened on the outside of the flexible filter screen (74), a connecting shell (77) fixedly arranged at the lower end of the material guide shell (71) and connected to the inlet end of the discharge pipe (5), a first scraping assembly (78) installed on the outside of the flexible filter screen (74), and a second scraping assembly (79) arranged inside the material guide shell (71).

2. A wet-process phosphoric acid filtration device according to claim 1, characterized in that: The first scraping assembly (78) comprises a connecting frame (781) fixedly arranged on one side of the inner part of the material guide shell (71), a scraping strip (782) rotatably connected to the lower end of the connecting frame (781), a connecting strip (783) fixedly arranged on the side of the scraping strip (782), a moving frame (784) inserted into the inner part of the connecting strip (783) and extending downward, a screw rod (785) threadedly connected to the lower end of the moving frame (784), a micro motor (786) connected to the bottom of the screw rod (785), and support rods (787) inserted into both sides of the lower end of the moving frame (784).

3. A wet-process phosphoric acid filtration device according to claim 1, characterized in that: The second scraper assembly (79) comprises a connecting rod (791) arranged on one side of the inside of the material guide shell (71), a locking shaft (792) passing through the upper end of the connecting rod (791) and threadedly locked with the inside of the material guide shell (71), a fastening shell (793) sleeved on the lower end of the connecting rod (791), a compression spring (794) built into the inside of the fastening shell (793), and a cleaning plate (795) fixed to the lower end of the fastening shell (793).

4. A wet-process phosphoric acid filtration device according to claim 1, characterized in that: The upper end of the material guide shell (71) is opened in the shape of an inverted truncated cone groove, and a connecting shell (77) is fixedly provided at the bottom of the opening end of the material guide shell (71) close to the material discharge pipe (5).

5. A wet-process phosphoric acid filtration device according to claim 2, characterized in that: The connecting frame (781) is correspondingly sleeved on the outside of the driving wheel (73), and the scraper strip (782) provided at the bottom of the connecting frame (781) is in contact with the outside of the flexible filter screen (74).

6. A wet-process phosphoric acid filtration device according to claim 2, characterized in that: The movable frame (784) is arranged in a horizontally inverted T-shaped frame shape as a whole, and the middle part of the lower end of the movable frame (784) is threadedly connected with the screw rod (785).

7. A wet-process phosphoric acid filtration device according to claim 2, characterized in that: Two support rods (787) are symmetrically installed along the lower end of the connecting frame (781), and the support rods (787) on both sides are slidably docked with the two sides of the bottom of the movable frame (784) correspondingly.

8. A wet-process phosphoric acid filtration device according to claim 3, characterized in that: The cleaning plate (795) is arranged in an inclined plate shape as a whole, and the scraping end at the bottom of the cleaning plate (795) is in contact with the inner side of the flexible filter screen (74).

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