Phosphogypsum phosphorus fluorine recovery device based on electrodialysis

Abstract

The utility model discloses a kind of phosphogypsum phosphorus fluorine recovery devices based on electrodialysis, it is related to phosphogypsum recovery equipment technical field.The utility model includes recovery shell, cathode plate and anode plate are installed in recovery shell interior, cation exchange membrane and anion exchange membrane are installed in recovery shell interior.The utility model is provided with the setting of cleaning component and adjusting assembly, directional injection is generated by the high-pressure water flow of high-pressure water pump through spray head, can strongly flush the fine particle adhered on membrane surface, scraper moves closely under the support of telescopic link, can scrape off sticky impurities, avoid hard contact damage, first motor drive screw rod in adjusting assembly horizontal displacement drives mobile seat, multiple-stage hydraulic rod controls spray head vertical stroke, so that cleaning mechanism can cover different areas of multiple groups of membranes, guarantee the stable operation of electrodialysis process, to significantly reduce the energy consumption rise and efficiency attenuation problem caused by membrane pollution.

Description

Technical Field

[0001] This utility model belongs to the technical field of phosphogypsum recovery equipment, and in particular relates to a phosphogypsum phosphorus and fluorine recovery device based on electrodialysis. Background Technology

[0002] Phosphogypsum is a large-scale industrial solid waste generated during the wet-process phosphoric acid production process, rich in valuable elements such as phosphorus and fluorine. Phosphorus and fluorine recovery aims to extract and enrich these resources from phosphogypsum, turning waste into treasure. Traditional treatment methods suffer from low efficiency and secondary pollution. Current advanced technologies, such as chemical precipitation, solvent extraction, and electrodialysis, can efficiently and selectively separate and recover phosphorus and fluorine, converting them into high-value-added products such as phosphoric acid and fluoride salts. This not only eliminates the potential pollution hazards to soil and water bodies from phosphogypsum stockpiles but also creates significant economic benefits, making it a key link in promoting the green and circular development of the phosphorus chemical industry.

[0003] In current phosphogypsum fluoride recovery devices, fine suspended particles and other impurities in the feed solution are easily adsorbed and accumulated on the surface of the ion exchange membrane and in the mesh channel during the fluoride recovery process. This phenomenon leads to membrane fouling, which manifests as increased system operating pressure, decreased current efficiency, and significant reduction in desalination and concentration effects. This not only increases energy consumption but also seriously affects the stable operation and recovery efficiency of the device.

[0004] To address this issue, we provide an electrodialysis-based phosphogypsum phosphorus and fluorine recovery device. Utility Model Content

[0005] The purpose of this invention is to provide a phosphogypsum phosphorus and fluorine recovery device based on electrodialysis. By combining the structure of the cleaning component and the adjustment component, it solves the problem in the prior art that some impurities adhere to the surface of the filter membrane during the ion exchange membrane filtration process, affecting the normal filtration effect.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a phosphorus and fluorine recovery device for phosphogypsum based on electrodialysis, comprising a recovery shell, inside which a cathode plate and an anode plate are installed, and inside which a cation exchange membrane and an anion exchange membrane are installed; a cleaning component is provided on one side of the recovery shell, the cleaning component including a water tank located at the top of the recovery shell, a high-pressure water pump connected to one side of the water tank, a telescopic rod installed at the bottom of the water tank, and a nozzle installed on one side of the telescopic rod; an adjustment component is provided on one side of the recovery shell, the adjustment component including a drive shell located at the top of the recovery shell, a first motor installed inside the drive shell, a screw installed at the output end of the first motor, and multi-stage hydraulic rods installed on both sides of the recovery shell.

[0008] The present invention is further configured such that the cleaning component includes a movable rod slidably connected inside the telescopic rod, a filter frame installed at the bottom of the movable rod, and a delivery pipe connected to one side of the high-pressure water pump.

[0009] The present invention is further configured such that a scraper is installed on the top of the nozzle, and the other end of the delivery pipe is connected to the nozzle.

[0010] The present invention is further configured such that a spring is fixedly connected inside the telescopic rod, and the other end of the spring is fixedly connected to the movable rod.

[0011] The present invention is further configured such that the adjusting assembly includes a guide rail plate installed on the top of the multi-stage hydraulic rod, a movable seat slidably connected inside the guide rail plate, and a second motor installed on the top of the movable seat.

[0012] The present invention is further configured such that the output end of the second motor is fixedly connected to the water tank, an adjusting plate is threadedly connected to the surface of the screw, and the other end of the adjusting plate is fixedly connected to the movable seat.

[0013] The present invention is further configured such that a sliding groove is provided on one side of the drive housing, the scraper is horizontally arranged, and the included angle between the nozzle and the scraper is 60 degrees.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model, through the arrangement of a cleaning component and an adjustment component, utilizes a high-pressure water flow generated by a high-pressure water pump, which is sprayed directionally through a nozzle to powerfully wash away fine particles adhering to the membrane surface. The scraper, supported by a telescopic rod, moves closely to the membrane surface, removing sticky impurities and avoiding damage from hard contact. The first motor in the adjustment component drives the screw to move the moving seat horizontally, and the multi-stage hydraulic rod controls the vertical stroke of the nozzle, enabling the cleaning mechanism to cover different areas of multiple membranes. This design not only reduces the labor intensity of manual cleaning but also effectively maintains the membrane permeability, ensuring the stable operation of the electrodialysis process, thereby significantly reducing the problems of increased energy consumption and efficiency decline caused by membrane fouling.

[0016] 2. During the cleaning process, the impurities washed off by this utility model are collected by the filter frame to prevent secondary pollution and ensure the cleanliness of the recycling environment. The design of the second motor driving the water tank and nozzle to rotate enables a single cleaning system to handle membrane modules arranged at multiple angles, enhancing the adaptability of the device. This series of structural combinations not only improves the treatment efficiency of phosphogypsum but also extends the service life of core components, providing reliable technical support for the resource utilization of industrial solid waste.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional diagram of a phosphogypsum phosphorus and fluorine recovery device based on electrodialysis.

[0020] Figure 2 This is a cross-sectional view of the recovery shell in a phosphogypsum phosphorus and fluorine recovery device based on electrodialysis.

[0021] Figure 3 This is a schematic diagram of the cleaning component in a phosphogypsum phosphorus and fluorine recovery device based on electrodialysis.

[0022] Figure 4 This is a cross-sectional view of the drive casing in a phosphogypsum phosphorus and fluorine recovery device based on electrodialysis.

[0023] Figure 5 This is a cross-sectional view of a telescopic rod in a phosphogypsum phosphorus and fluorine recovery device based on electrodialysis.

[0024] In the attached diagram: 1. Recovery shell; 2. Cathode plate; 3. Anode plate; 4. Cation exchange membrane; 5. Anion exchange membrane; 6. Cleaning assembly; 601. Water tank; 602. High-pressure water pump; 603. Telescopic rod; 604. Nozzle; 7. Adjustment assembly; 701. Drive shell; 702. First motor; 703. Screw; 704. Multi-stage hydraulic rod; 605. Moving rod; 606. Filter frame; 607. Delivery pipe; 608. Scraper; 8. Spring; 705. Guide rail plate; 706. Moving seat; 707. Second motor; 708. Adjustment plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1 Please see Figures 1-5This utility model is a phosphorus and fluorine recovery device for phosphogypsum based on electrodialysis, including a recovery shell 1, a cathode plate 2 and an anode plate 3 installed inside the recovery shell 1, a cation exchange membrane 4 and an anion exchange membrane 5 installed inside the recovery shell 1; a cleaning component 6 is provided on one side of the recovery shell 1, the cleaning component 6 includes a water tank 601 located at the top of the recovery shell 1, a high-pressure water pump 602 connected to one side of the water tank 601, a telescopic rod 603 installed at the bottom of the water tank 601, and a nozzle 604 installed on one side of the telescopic rod 603; an adjustment component 7 is provided on one side of the recovery shell 1, the adjustment component 7 includes a drive shell 701 located at the top of the recovery shell 1, a first motor 702 installed inside the drive shell 701, a screw 703 installed at the output end of the first motor 702, and multi-stage hydraulic rods 704 installed on both sides of the recovery shell 1.

[0027] Further details: The recovery shell 1 contains a cathode plate 2 and an anode plate 3. A stable electric field is formed by an external DC power supply. Driven by this electric field, target anions such as phosphorus and fluorine in the phosphogypsum solution migrate directionally towards the anode plate 3, while cations such as calcium migrate towards the cathode plate 2. The recovery shell 1 also contains a cation exchange membrane 4 and an anion exchange membrane 5. The cation exchange membrane 4 only allows cations to pass through, while the anion exchange membrane 5 does the opposite. Working together, they form a concentration chamber and a desalination chamber within the recovery shell 1, efficiently separating and enriching phosphorus and fluorine ions from the complex solution. This significantly improves the purity and efficiency of resource recovery and represents a mature existing technology application. The water tank 601 is used to store clean water... The cleaning process provides a continuous water supply. The high-pressure water pump 602 pressurizes the water in the water tank 601 to generate a high-pressure water jet with strong impact. The nozzle 604 sprays the water delivered by the high-pressure water pump 602 onto the membrane surface at a specific angle and shape, directly impacting and removing contaminants. The first motor 702 serves as a power source, providing stable and reliable rotational motion. The screw 703 installed at the output end of the first motor 702 converts the rotational motion of the motor into linear motion, achieving precise displacement control through threaded transmission. The multi-stage hydraulic rods 704 installed on both sides of the recovery shell 1 are responsible for the vertical lifting and lowering motion of the cleaning component 6, ensuring that the nozzle 604 can completely cover the entire front area of ​​the ion exchange membrane.

[0028] Example 2 Please see Figures 1-5Based on Embodiment 1, the cleaning assembly 6 further includes a movable rod 605 slidably connected inside the telescopic rod 603, a filter frame 606 installed at the bottom of the movable rod 605, a delivery pipe 607 connected to one side of the high-pressure water pump 602, a scraper 608 installed on the top of the nozzle 604, the other end of the delivery pipe 607 connected to the nozzle 604, a spring 8 fixedly connected inside the telescopic rod 603, and the other end of the spring 8 fixedly connected to the movable rod 605. The adjustment assembly 7 also includes a multi-stage... The hydraulic rod 704 has a guide rail plate 705 at the top, a movable seat 706 slidably connected inside the guide rail plate 705, a second motor 707 installed on the top of the movable seat 706, the output end of the second motor 707 is fixedly connected to the water tank 601, an adjusting plate 708 is threadedly connected to the surface of the screw 703, the other end of the adjusting plate 708 is fixedly connected to the movable seat 706, a sliding groove is opened on one side of the drive housing 701, the scraper 608 is horizontally set, and the included angle between the nozzle 604 and the scraper 608 is 60 degrees.

[0029] Further details: The filter frame 606 collects and intercepts impurities washed down by the high-pressure water flow, facilitating subsequent centralized cleaning. A scraper 608 is mounted on the top of the nozzle 604. This scraper 608 is typically made of a flexible material such as rubber. While the nozzle 604 is rinsing with high-pressure water, the scraper 608 moves closely against the membrane surface, removing viscous or gelatinous contaminants that are difficult to remove by water alone through physical scraping. This achieves a dual cleaning effect of water rinsing and mechanical scraping, significantly improving the decontamination capacity. The movable seat 706 inside the guide rail 705 serves as the horizontal support and moving base for the cleaning component 6. Its cooperation with the guide rail 705 enables precise positioning of the cleaning component 6 in the horizontal plane. A second motor 707 mounted on top of the movable seat 706 drives the cleaning component. 6. Rotation: This function allows the nozzle 604 and scraper 608 to adjust their angles, enabling comprehensive cleaning of membrane modules in different orientations or positions within the device. This greatly enhances the flexibility and thoroughness of cleaning. The 60-degree angle between the nozzle 604 and scraper 608 ensures that the high-pressure water flow acts on the membrane surface with optimal impact force. Simultaneously, it effectively coordinates with the mechanical movement of the scraper 608, balancing rinsing efficiency and scraping effect, together forming a highly efficient and synergistic cleaning mechanism. The second motor 707 drives the water tank 601 and telescopic rod 603 to rotate. When the filter frame 606 moves to the top of the water tank 601 shell, the nozzle 604 and filter frame 606 can be rotated to facilitate front-facing rinsing of the cation exchange membrane 4 and anion exchange membrane 5 on the other side of the water tank 601 shell.

[0030] The working principle of this utility model is as follows: the operator starts the cathode plate 2 and anode plate 3 through an external controller. Under the action of DC electric field, the anions and cations in the phosphogypsum liquid in the recovery shell 1 undergo directional migration. Anions such as phosphate and fluoride ions pass through the anion exchange membrane 5 and enter the concentration chamber, thereby realizing the enrichment and recovery of phosphorus and fluorine. Cations such as calcium ions pass through the cation exchange membrane 4 and migrate to the cathode chamber. The selective separation characteristics of the anion and cation exchange membrane 4 effectively realize the separation of target products and impurities, and ultimately achieve the purpose of efficient recovery of phosphorus and fluorine resources. This is a mature existing technology application.

[0031] After the cation exchange membrane 4 and anion exchange membrane 5 become clogged with impurities due to prolonged operation, two sets of multi-stage hydraulic rods 704 can be activated. The multi-stage hydraulic rods 704 drive the guide rail plate 705 to move downwards synchronously. The guide rail plate 705, in conjunction with the telescopic rod 603, drives the nozzle 604 to move downwards. At the same time, the high-pressure water pump 602 is activated. The high-pressure water pump 602 draws water from the water tank 601, pressurizes it, and injects it into the delivery pipe 607. The water is sprayed out through the downward-sloping nozzle 604, rinsing the anion exchange membrane 5 from the front side and washing away the pollutants clogging the flow channel inlet and the screen. As the nozzle 604 moves downwards, it drives the scraper 608 to move. The scraper 608 is made of rubber and can scrape off the colloidal impurities on the surface of the anion exchange membrane 5, further improving the filtration effect. The impurities washed down enter the filter frame 606 for collection.

[0032] When the next set of anion exchange membranes 5 needs to be rinsed, the multi-stage hydraulic rod 704 can be controlled to move the guide rail plate 705 upward. The guide rail plate 705 moves the telescopic rod 603 and the nozzle 604. While the telescopic rod 603 moves, it also moves the moving rod 605 and the filter frame 606. When the filter frame 606 moves upward out of the recovery shell 1, it is convenient for the staff to clean the impurities inside the filter frame 606. Then, the first motor 702 is started. The first motor 702, together with the screw 703, moves the adjusting plate 708 and the moving seat 706. The moving seat 706 moves the telescopic rod 603 and the nozzle 604. While the telescopic rod 603 moves, it also moves the filter frame 606, so that the filter frame 606 is aligned with the front space of the next set of anion exchange membranes 5, and the scraper 608 is aligned with the front of the anion exchange membrane 5. Then, the above cleaning process is repeated to clean the next set of exchange membranes, which can further improve the cleaning effect and improve the recovery efficiency of phosphorus and fluorine from phosphogypsum.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A phosphogypsum phosphorus fluorine recovery device based on electrodialysis, comprising a recovery shell (1), characterized in that: The recovery shell (1) is equipped with a cathode plate (2) and an anode plate (3), and the recovery shell (1) is equipped with a cation exchange membrane (4) and an anion exchange membrane (5). A cleaning component (6) is provided on one side of the recycling shell (1). The cleaning component (6) includes a water tank (601) located on the top of the recycling shell (1), a high-pressure water pump (602) connected to one side of the water tank (601), a telescopic rod (603) installed at the bottom of the water tank (601), and a nozzle (604) installed on one side of the telescopic rod (603). An adjustment assembly (7) is provided on one side of the recovery shell (1). The adjustment assembly (7) includes a drive shell (701) located on the top of the recovery shell (1), a first motor (702) installed inside the drive shell (701), a screw (703) installed at the output end of the first motor (702), and multi-stage hydraulic rods (704) installed on both sides of the recovery shell (1).

2. The phosphogypsum phosphorus and fluorine recovery device based on electrodialysis according to claim 1, characterized in that: The cleaning assembly (6) also includes a movable rod (605) slidably connected inside the telescopic rod (603), a filter frame (606) installed at the bottom of the movable rod (605), and a delivery pipe (607) connected to one side of the high-pressure water pump (602).

3. The phosphogypsum phosphorus and fluorine recovery device based on electrodialysis according to claim 2, characterized in that: A scraper (608) is installed on the top of the nozzle (604), and the other end of the delivery pipe (607) is connected to the nozzle (604).

4. The phosphogypsum phosphorus and fluorine recovery device based on electrodialysis according to claim 1, characterized in that: A spring (8) is fixedly connected inside the telescopic rod (603), and the other end of the spring (8) is fixedly connected to the moving rod (605).

5. The phosphogypsum phosphorus and fluorine recovery device based on electrodialysis according to claim 1, characterized in that: The adjustment assembly (7) also includes a guide plate (705) mounted on the top of the multi-stage hydraulic rod (704), a movable seat (706) slidably connected inside the guide plate (705), and a second motor (707) mounted on the top of the movable seat (706).

6. The phosphogypsum phosphorus and fluorine recovery device based on electrodialysis according to claim 5, characterized in that: The output end of the second motor (707) is fixedly connected to the water tank (601), and the screw (703) is threadedly connected to an adjusting plate (708). The other end of the adjusting plate (708) is fixedly connected to the movable seat (706).

7. The phosphogypsum phosphorus and fluorine recovery device based on electrodialysis according to claim 3, characterized in that: The drive housing (701) has a sliding groove on one side, the scraper (608) is horizontally arranged, and the nozzle (604) and the scraper (608) have an angle of 60 degrees.

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