High-concentration phosphoric acid membrane purification and recovery equipment

Abstract

The utility model discloses high-concentration phosphoric acid membrane purification and recovery equipment which comprises a purification box, the lower end of a supporting frame is fixedly connected with a buffer box, the lower end of the buffer box is connected with a water flowing pipe, supporting legs are arranged on the two sides of the lower end of the buffer box, and spraying heads are arranged on the two sides of the upper end in the purification box. A supporting frame is fixedly connected to the lower end of the interior of the purification box, a membrane assembly is fixedly connected to the upper end of the supporting frame, an insertion cavity is formed between the purification box and the buffer box, and a deposition structure is inserted into the insertion cavity. According to the device, a large amount of solid precipitates are separated out in the standing, settling and concentrating processes of dilute phosphoric acid, liquid flows outwards from the circulating holes in one side, and after the liquid flows out, a part of solution gradually flows downwards and enters the bottom of the buffer tank through the outflow holes; condensate in dilute phosphoric acid can be gathered in the trapezoidal sedimentation tank, so that the condensate in the dilute phosphoric acid is prevented from blocking the water flowing pipe.

Description

Technical Field

[0001] This utility model relates to the field of phosphate membrane purification and recycling technology, specifically a high-concentration phosphate membrane purification and recycling device. Background Technology

[0002] Phosphoric acid is a widely used basic chemical raw material. With the continuous development of science and technology, the application of high-purity phosphoric acid and phosphorus-containing products in industrial production is becoming increasingly widespread, especially in the fields of electronics, pharmaceuticals, and food, where demand is showing an upward trend year by year. There are two main methods for producing phosphoric acid: thermal phosphoric acid and wet phosphoric acid. Currently, after dilute phosphoric acid is extracted in the phosphoric acid workshop and filtered by a rotary filter, it still contains a large number of solid particles and suspended matter. During the static sedimentation and concentration process, a large amount of solid precipitate will be released. Most of the solid phases in the precipitate are phosphogypsum and potassium hydrogen phosphate tetrahydrate iron-aluminum complex, etc. In addition, wet phosphoric acid contains a large number of soluble impurities, such as magnesium ions, calcium ions, iron ions, aluminum ions, sulfate ions, and fluorosilicate ions.

[0003] However, in existing phosphate membrane purification and recovery systems, a large amount of solid precipitate is generated during the settling and concentration of dilute phosphoric acid. This solid precipitate will settle in the pipes and cause blockages. This will lead to poor flow in the water pipes after long-term use, ultimately affecting production. Therefore, it does not meet the current needs. To address this, we propose a high-concentration phosphate membrane purification and recovery device. Utility Model Content

[0004] The purpose of this invention is to provide a high-concentration phosphate membrane purification and recovery device to solve the problem mentioned in the background art that in the phosphate membrane purification and recovery process, a large amount of solid precipitate will be released during the static sedimentation and concentration of dilute phosphate. These solid precipitates will settle in the pipes, causing blockages. This will lead to poor flow of water pipes after long-term use, ultimately affecting production.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-concentration phosphate membrane purification and recovery device, comprising a purification box, a buffer box fixedly connected to the lower end of the support frame, a water pipe connected to the lower end of the buffer box, support feet on both sides of the lower end of the buffer box, spray heads on both sides of the upper end of the purification box, a support frame fixedly connected to the lower end of the purification box, a membrane module fixedly connected to the upper end of the support frame, an insertion cavity between the purification box and the buffer box, and a deposition structure inserted into the insertion cavity.

[0006] Preferably, the deposition structure includes a trapezoidal deposition tank inserted into the insertion cavity, with a first connecting plate fixedly connected to both the upper and lower ends of the trapezoidal deposition tank. Flow holes are provided on both sides of the upper end of the trapezoidal deposition tank, and outflow holes are vertically provided on both sides of the first connecting plate. A snap-fit ​​plate is inserted between the two first connecting plates.

[0007] Preferably, one end of the snap-fit ​​plate is fixedly connected to a connecting frame, one end of the connecting frame is fixedly connected to a connecting plate, both the upper and lower ends of the connecting plate are fixedly connected to elastic sheets, and one end of the elastic sheet is fixedly connected to a top plate.

[0008] Preferably, the top plate is pressed against one side of the first connecting plate.

[0009] Preferably, a second connecting plate is fixedly connected to both sides of the lower end of the purification box and both sides of the upper end of the buffer box. A connecting hole is provided between the second connecting plate and the first connecting plate. A pin is inserted into the connecting hole, and a plug piece is fixedly connected to both ends of the pin.

[0010] Preferably, the connecting hole has side grooves on both sides, and the pin has plug-in pieces fixedly connected to both sides, with the plug-in pieces being snapped into the side grooves.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model utilizes the process of dilute phosphoric acid settling and concentration to precipitate a large amount of solid precipitate, which continuously settles in a trapezoidal sedimentation tank. Then, a portion of the waste liquid flows upward from the trapezoidal sedimentation tank, and the liquid flows outward from the flow hole on one side. After the liquid flows out, a portion of the solution gradually flows downward and enters the bottom of the buffer tank through the outflow hole. This design allows the waste liquid to be discharged from the lower water pipe. This design also allows the coagulants in the dilute phosphoric acid to accumulate in the trapezoidal sedimentation tank, preventing the coagulants in the dilute phosphoric acid from clogging the water pipe.

[0013] 2. In this utility model, a pin is inserted into the connecting hole, and two ends of the pin are fixedly connected to the connecting pieces. Side grooves are provided on both sides of the connecting hole, and connecting pieces are fixedly connected to both sides of the pin. The connecting pieces are snapped into the side grooves. The connecting pieces are made of elastic metal, so the connecting pieces can snap into the side grooves, thereby allowing the pin to be inserted into the connecting hole, thus realizing the fixed connection between the second connecting plate and the first connecting plate. Attached Figure Description

[0014] Figure 1 This is a frontal sectional view of the overall structure of this utility model;

[0015] Figure 2 This utility model Figure 1 Enlarged cross-sectional view at point A in the middle;

[0016] Figure 3 This utility model Figure 2 Enlarged cross-sectional view at point B in the middle;

[0017] Figure 4 This is a cross-sectional schematic diagram of the overall purification box, sedimentation structure and buffer box of this utility model after separation.

[0018] In the diagram: 1. Purification tank; 2. Support frame; 3. Membrane module; 4. Buffer tank; 5. Deposition structure; 501. Trapezoidal deposition tank; 502. Flow hole; 503. Outflow hole; 504. First connecting plate; 6. Spray head; 7. Support foot; 8. Water pipe; 801. Top plate; 802. Snap-fit ​​plate; 803. Connecting frame; 804. Connecting plate; 805. Elastic sheet; 9. Second connecting plate; 10. Pin; 11. Connecting hole; 12. Side groove; 13. Insertion piece; 14. Insertion cavity. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figures 1 to 4 An embodiment of this utility model provides a high-concentration phosphate membrane purification and recovery device, comprising a purification box 1, a buffer box 4 fixedly connected to the lower end of the support frame 2, a water pipe 8 connected to the lower end of the buffer box 4, support feet 7 on both sides of the lower end of the buffer box 4, spray heads 6 on both sides of the upper end of the purification box 1, a support frame 2 fixedly connected to the lower end of the purification box 1, a membrane assembly 3 fixedly connected to the upper end of the support frame 2, and an insertion cavity 14 between the purification box 1 and the buffer box 4, wherein a deposition structure 5 is inserted into the insertion cavity 14.

[0021] The aforementioned deposition structure 5 includes a trapezoidal deposition tank 501 inserted inside the insertion cavity 14. The upper and lower ends of the trapezoidal deposition tank 501 are fixedly connected to first connecting plates 504. The upper end of the trapezoidal deposition tank 501 is provided with flow holes 502 on both sides. The first connecting plates 504 are provided with vertical outflow holes 503 on both sides. A water pipe 8 is inserted between the two first connecting plates 504. The trapezoidal deposition tank 501 can deposit condensates in dilute phosphoric acid.

[0022] One end of the snap-fit ​​plate 802 is fixedly connected to a connecting frame 803, and one end of the connecting frame 803 is fixedly connected to a connecting plate 804. Both the upper and lower ends of the connecting plate 804 are fixedly connected to elastic sheets 805, and one end of the elastic sheet 805 is fixedly connected to a top plate 801. The top plate 801 is pressed against one side of the first connecting plate 504.

[0023] A second connecting plate 9 is fixedly connected to both sides of the lower end of the purification box 1 and both sides of the upper end of the buffer box 4. A connecting hole 11 is provided between the second connecting plate 9 and the first connecting plate 504. A pin 10 is inserted into the connecting hole 11. A plug piece 13 is fixedly connected to both ends of the pin 10. A side groove 12 is provided on both sides inside the connecting hole 11. A plug piece 13 is fixedly connected to both sides of the pin 10. The plug piece 13 is snapped into the side groove 12. The plug piece 13 is made of elastic metal, so the plug piece 13 can snap into the side groove 12, thereby allowing the pin 10 to be inserted into the connecting hole 11, thus realizing the fixed connection between the second connecting plate 9 and the first connecting plate 504.

[0024] In use, firstly, the entire deposition structure 5 is inserted into the insertion cavity 14 between the purification box 1 and the buffer box 4, so that the deposition structure 5 can be fixed in the insertion cavity 14. Then, the pin 10 is inserted into the connection hole 11 between the second connecting plate 9 and the first connecting plate 504. The insertion pieces 13 on both sides of the pin 10 can be engaged in the side groove 12, so that the entire pin 10 is inserted and connected to the second connecting plate 9 and the first connecting plate 504.

[0025] The above settings allow the overall deposition structure 5 to be inserted into the insertion cavity 14. Then, the snap-fit ​​plate 802 is inserted between the two first connecting plates 504. The elastic sheet 805 is made of elastic metal. The stretching force of the elastic sheet 805 presses the two top plates 801 to the upper and lower ends respectively, thereby pressing the top plates 801 against the first connecting plates 504 at the upper and lower ends. This setting allows the first connecting plate 504 and the second connecting plate 9 to fit tightly together. A sealing element is provided between the second connecting plate 9 and the first connecting plate 504. This setting prevents the liquid inside the purification box 1 and the buffer box 4 from flowing out.

[0026] Next, the spray head 6 is turned on, causing it to spray the membrane module 3 on the support frame 2. This setting allows the membrane module 3 to be immersed in the dilute phosphoric acid solution, causing the phosphoric acid membrane on the membrane module 3 to detach. During the static settling and concentration process, a large amount of solid precipitate will be released from the dilute phosphoric acid and continuously deposited in the trapezoidal sedimentation tank 501. Then, a portion of the waste liquid overflows from the trapezoidal sedimentation tank 501, and the liquid will flow outward from the flow hole 502 on one side. After the liquid flows out, a portion of the solution will gradually flow downward and enter the bottom of the buffer tank 4 through the outlet hole 503. This setting allows the waste liquid to be discharged from the lower water pipe 8. This setting allows the coagulants in the dilute phosphoric acid to accumulate in the trapezoidal sedimentation tank 501, preventing the coagulants in the dilute phosphoric acid from clogging the water pipe 8.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-concentration phosphoric acid membrane purification recovery equipment comprising a purification tank (1), characterized in that: The lower end of the support frame (2) is fixedly connected with a buffer box (4), the lower end of the buffer box (4) is connected with a water pipe (8), both sides of the lower end of the buffer box (4) are provided with support feet (7), both sides of the upper end inside the purification box (1) are provided with spray heads (6), the lower end inside the purification box (1) is fixedly connected with a support frame (2), the upper end of the support frame (2) is fixedly connected with a membrane assembly (3), a plug-in cavity (14) is arranged between the purification box (1) and the buffer box (4), and a deposition structure (5) is plugged into the plug-in cavity (14).

2. The high concentration phosphoric acid membrane purification recovery apparatus according to claim 1, characterized by: The deposition structure (5) comprises a trapezoidal deposition groove (501) plugged into the plug-in cavity (14), the trapezoidal deposition groove (501) is fixedly connected with first connecting plates (504) at both ends, flow-through holes (502) are arranged on both sides of the upper end of the trapezoidal deposition groove (501), flow-out holes (503) are vertically arranged on both sides of the first connecting plates (504), and a clamping plate (802) is plugged between the two first connecting plates (504).

3. The high concentration phosphoric acid membrane purification recovery apparatus according to claim 2, characterized by: One end of the clamping plate (802) is fixedly connected with a connecting frame (803), one end of the connecting frame (803) is fixedly connected with a connecting plate (804), the upper and lower ends of the connecting plate (804) are fixedly connected with elastic sheets (805), and one end of the elastic sheet (805) is fixedly connected with a top plate (801).

4. The high concentration phosphoric acid membrane purification recovery apparatus according to claim 3, characterized by: The top plate (801) is pressed on one side of the first connecting plate (504).

5. The apparatus for purification and recovery of high concentration phosphoric acid according to claim 4, characterized in that: Both sides of the lower end of the purification box (1) and both sides of the upper end of the buffer box (4) are fixedly connected with second connecting plates (9), the second connecting plates (9) and the first connecting plates (504) are provided with connecting holes (11), the connecting holes (11) are plugged with bolts (10), both ends of the bolt (10) are fixedly connected with plug-in sheets (13).

6. The high concentration phosphoric acid membrane purification recovery apparatus according to claim 5, characterized by: Both sides of the connecting holes (11) are provided with side grooves (12), both sides of the bolt (10) are fixedly connected with the plug-in sheets (13), and the plug-in sheets (13) are clamped in the side grooves (12).

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