Comprehensive utilization device for phosphogypsum

Abstract

The utility model relates to the field of wet-process phosphoric acid production, and discloses a comprehensive utilization device for ardealite, which comprises a fixed base, the top of the fixed base is fixedly connected with a recovery bin, the interior of the recovery bin is fixedly connected with a filter bin, the top of the filter bin is provided with a feeding port, and the left side of the recovery bin is fixedly connected with a power assembly. The right side of the power assembly is fixedly connected with an auger, a liquid outlet is formed in the bottom of the recycling bin, the right side of the recycling bin is fixedly connected with a discharging bin, and a discharging opening is formed in the bottom of the discharging bin. According to the utility model, through the arrangement of the auger, the filter bin and the extrusion circular truncated cone, after a solid product in wet-process phosphoric acid production is fed into the feeding port, the rotating motor is started to extrude the solid product and the extrusion circular truncated cone, so that phosphoric acid and phospholime are conveniently separated to obtain phospholime with less phosphoric acid and lower acidity; meanwhile, part of phosphoric acid is recycled, and economic benefits are good.

Description

Technical Field

[0001] The utility model relates to the field of wet-process phosphoric acid production, in particular to a device for comprehensive utilization of phosphogypsum. Background Art

[0002] Wet-process phosphoric acid is a phosphoric acid product obtained by decomposing phosphate rock with inorganic acids (mainly sulfuric acid, nitric acid or hydrochloric acid). This method dominates in phosphoric acid production, with its production cost 20% to 30% lower than that of thermal-process phosphoric acid. And after appropriate purification treatment, the purity of the product can be comparable to that of thermal-process phosphoric acid. However, wet-process phosphoric acid also has some disadvantages. Since it is a product of acid-rock reaction, the product usually contains certain impurities such as fluorine, heavy metals, etc., which need to be removed and purified in subsequent processes. In addition, a large amount of by-product phosphogypsum is generated during the production process of wet-process phosphoric acid.

[0003] Phosphogypsum is a solid waste generated in the wet-process phosphoric acid process, whose main component is calcium sulfate dihydrate. In addition, it also contains a small amount of incompletely decomposed phosphate rock, residual phosphoric acid, fluorides, acid-insoluble substances, organic matter and other impurities. In order to recycle the phosphogypsum generated during the production process of wet-process phosphoric acid, a device for comprehensive utilization of phosphogypsum is required.

[0004] In the current wet-process phosphoric acid production process, the phosphogypsum generated is usually the solid product obtained by directly filtering the phosphoric acid in it. There is more phosphoric acid in this solid product that cannot be recycled. At the same time, the phosphogypsum contains a relatively large amount of phosphoric acid, resulting in too strong acidity of the phosphogypsum. When the phosphogypsum is reused, such as made into gypsum boards or gypsum blocks, the gypsum boards and gypsum blocks made of such phosphogypsum with too strong acidity will affect the product quality. For this reason, a device for comprehensive utilization of phosphogypsum is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a device for comprehensive utilization of phosphogypsum, aiming to improve the problem that the phosphogypsum obtained by directly filtering the phosphoric acid in the prior art has too strong acidity and affects the quality of gypsum products during reuse.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A comprehensive utilization device for phosphogypsum, including a fixed base, a recovery bin is fixedly connected to the top of the fixed base, a filtration bin is fixedly connected inside the recovery bin, a feeding port is arranged at the top of the filtration bin, a power assembly is fixedly connected to the left side of the recovery bin, the power assembly is used to provide rotational power, a screw conveyor is fixedly connected to the right side of the power assembly, a liquid discharge port is opened at the bottom of the recovery bin, a discharge bin is fixedly connected to the right side of the recovery bin, a discharge port is arranged at the bottom of the discharge bin, an extrusion bin is fixedly connected to the right side of the discharge bin, a sliding round block is slidably connected inside the extrusion bin, a pressure regulating assembly is fixedly connected to the right side of the sliding round block, the pressure regulating assembly is used to adjust the extrusion pressure, a connecting column is fixedly connected to the left side of the sliding round block, and an extrusion frustum is fixedly connected to the left side of the connecting column.

[0007] As a further description of the above technical solution:

[0008] The pressure regulating assembly includes an extrusion spring, the left end of the extrusion spring is fixedly connected to the right side of the sliding round block, the right end of the extrusion spring is fixedly connected to an extrusion block, a threaded column is fixedly connected to the right side of the extrusion block, a knob is threadedly connected to the outer periphery of the threaded column, a chute is opened on the outer periphery of the threaded column, and a limiting block is slidably connected inside the chute.

[0009] As a further description of the above technical solution:

[0010] The outer periphery of the feeding port is fixedly connected inside the recovery bin.

[0011] As a further description of the above technical solution:

[0012] The power assembly includes a motor bracket, the right side of the motor bracket is fixedly connected to the left side of the recovery bin, a rotating motor is fixedly connected inside the motor bracket, and the left end of the screw conveyor is fixedly connected to the right output shaft of the rotating motor.

[0013] As a further description of the above technical solution:

[0014] The outer periphery of the screw conveyor is rotatably connected inside the filtration bin.

[0015] As a further description of the above technical solution:

[0016] The right end opening of the filtration bin is in contact with the outer periphery of the extrusion frustum, and the outer periphery of the extrusion frustum is slidably connected inside the discharge bin.

[0017] As a further description of the above technical solution:

[0018] The outer periphery of the extrusion block is slidably connected inside the extrusion bin.

[0019] As a further description of the above technical solution:

[0020] The outer periphery of the threaded column is slidably connected to the inside of the extrusion bin, and the outside of the limiting block is fixedly connected to the inside of the extrusion bin.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by arranging the auger, the filter bin and the extrusion frustum, after the solid product in the wet-process phosphoric acid production is put into the feeding port, the rotating motor is started, which will make the solid product move to the right and generate extrusion with the extrusion frustum, so as to conveniently separate phosphoric acid and phosphorite, obtain phosphorite with less phosphoric acid and lower acidity, and recover part of phosphoric acid at the same time, with better economic benefits.

[0023] 2. In the utility model, by arranging the extrusion round block, the threaded column and the limiting block, turning the knob makes the extrusion round block squeeze the extrusion spring to the left, so that the extrusion spring generates elastic force, which improves the initial pressure of the extrusion frustum, and can conveniently adjust the extrusion pressure on the phosphorite, so as to be applicable to the extrusion recovery operation of phosphorite with different humidities. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall front view of a device for comprehensive utilization of phosphogypsum proposed by the utility model;

[0025] Figure 2 is the front sectional view of the recovery bin of a device for comprehensive utilization of phosphogypsum proposed by the utility model;

[0026] Figure 3 is the front sectional view of the extrusion bin of a device for comprehensive utilization of phosphogypsum proposed by the utility model.

[0027] Legend:

[0028] 1. Fixed base; 2. Recovery bin; 3. Filter bin; 4. Feeding port; 5. Motor support; 6. Rotating motor; 7. Auger; 8. Drain port; 9. Discharge bin; 10. Discharge port; 11. Extrusion bin; 12. Sliding round block; 13. Connecting column; 14. Extrusion frustum; 15. Extrusion spring; 16. Extrusion round block; 17. Threaded column; 18. Knob; 19. Chute; 20. Limiting block. DETAILED DESCRIPTION OF THE INVENTION

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Referring to Figure 1 - Figure 2 , an embodiment provided by the present utility model: A phosphogypsum comprehensive utilization device includes a fixed base 1 for fixed connection. A recovery bin 2 for facilitating the recovery of phosphoric acid is fixedly connected to the top of the fixed base 1. A filter bin 3 is fixedly connected inside the recovery bin 2. Small holes are provided inside the filter bin 3, allowing liquids to pass through while solids cannot. A feeding port 4 for facilitating feeding is provided at the top of the filter bin 3. The outer periphery of the feeding port 4 is fixedly connected inside the recovery bin 2. A power assembly is fixedly connected to the left side of the recovery bin 2. The power assembly is used to provide rotational power and includes a motor bracket 5 for fixed connection. The right side of the motor bracket 5 is fixedly connected to the left side of the recovery bin 2. A rotating motor 6 for providing rotational power is fixedly connected inside the motor bracket 5. A screw conveyor 7 is fixedly connected to the right side of the power assembly. The left end of the screw conveyor 7 is fixedly connected to the right output shaft of the rotating motor 6. When the rotating motor 6 is turned on, the right output shaft of the rotating motor 6 will drive the screw conveyor 7 to rotate. The outer periphery of the screw conveyor 7 is rotatably connected inside the filter bin 3. The rotation of the screw conveyor 7 can drive the inside of the filter bin 3 to convey fixedly to the right. A liquid discharge port 8 for facilitating the discharge of liquid is provided at the bottom of the recovery bin 2.

[0031] Referring to Figure 2 - Figure 3 , a discharge bin 9 is fixedly connected to the right side of the recovery bin 2. A discharge port 10 for facilitating the discharge of phosphogypsum is provided at the bottom of the discharge bin 9. An extrusion bin 11 is fixedly connected to the right side of the discharge bin 9. A sliding round block 12 is slidably connected inside the extrusion bin 11. The extrusion bin 11 restricts the sliding round block 12 to slide only left and right along the inner wall of the extrusion bin 11. A pressure adjustment assembly is fixedly connected to the right side of the sliding round block 12. The pressure adjustment assembly is used to adjust the extrusion pressure. A connecting column 13 for fixed connection is fixedly connected to the left side of the sliding round block 12. An extrusion frustum 14 is fixedly connected to the left side of the connecting column 13. The right end opening of the filter bin 3 is in contact with the outer periphery of the extrusion frustum 14. When the phosphogypsum is conveyed to the right end opening of the filter bin 3, it will push the extrusion frustum 14 to the right. At the same time, the extrusion frustum 14 will extrude the phosphogypsum to the left, so that the phosphoric acid solution inside the phosphogypsum is extruded. The outer periphery of the extrusion frustum 14 is slidably connected inside the discharge bin 9.

[0032] Referring to Figure 1 - Figure 3, the pressure regulating assembly includes a compression spring 15. The left end of the compression spring 15 is fixedly connected to the right side of the sliding circular block 12. There are four groups of compression springs 15, which are evenly distributed annularly on the right side of the sliding circular block 12. The right end of the compression spring 15 is fixedly connected to a compression circular block 16. When the compression spring 15 is compressed, it will deform and generate elastic forces on both sides. The outer circumference of the compression circular block 16 is slidably connected to the inside of the compression chamber 11. The compression chamber 11 restricts the compression circular block 16 to slide only left and right along the inner wall of the compression chamber 11. The right side of the compression circular block 16 is fixedly connected to a threaded column 17. The outer circumference of the threaded column 17 is slidably connected to the inside of the compression chamber 11. The compression chamber 11 restricts the threaded column 17 to slide only left and right inside the compression chamber 11. The outer circumference of the threaded column 17 is threadedly connected to a knob 18. By rotating the knob 18, the knob 18 can drive the threaded column 17 to move left and right along the central axis of the knob 18. There are two groups of chutes 19 on the outer circumference of the threaded column 17, which are symmetrically arranged up and down inside the threaded column 17. A limiting block 20 is slidably connected to the inside of the chute 19. The chute 19 and the limiting block 20 prevent the threaded column 17 from rotating. The outer side of the limiting block 20 is fixedly connected to the inside of the compression chamber 11.

[0033] Working principle: When it is desired to reduce the residual phosphoric acid in the phosphorite, the solid product generated in the wet-process phosphoric acid production is put into the inside of the feeding port 4, and then the rotating motor 6 is started. The rotating motor 6 drives the auger 7 to rotate, and the auger 7 drives the solid product to be transported to the right. When the solid product moves to the right and contacts the extrusion frustum 14, it will push the extrusion frustum 14 to the right. The extrusion frustum 14 squeezes the compression spring 15 to the right, causing the compression spring 15 to be compressed, and at the same time generating pressure on the solid product. The auger 7 drives a continuous stream of solid products to move to the right. Under the extrusion of the extrusion frustum 14, the liquid phosphoric acid is squeezed out, enters the cavity between the recovery chamber 2 and the filtration chamber 3 through the filtration chamber 3, and then is discharged through the drain port 8. The phosphorite from which the phosphoric acid liquid has been discharged pushes the extrusion frustum 14, creating a gap between the extrusion frustum 14 and the drain port 8, and is discharged from the discharge port 10, thus obtaining phosphorite with less phosphoric acid and lower acidity, and at the same time recovering part of the phosphoric acid. When it is desired to adjust the extrusion pressure, rotate the knob 18. The knob 18 drives the threaded column 17 to move to the left along the central axis of the knob 18, driving the compression circular block 16 to move to the left, squeezing the compression spring 15, causing the compression spring 15 to be compressed and generate elastic force, increasing the initial pressure required for the extrusion frustum 14 to move to the right, and thus conveniently adjusting the pressure for extruding the phosphorite.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An apparatus for comprehensive utilization of phosphogypsum, comprising a fixed base (1), characterized in that: At the top of the fixed base (1), a recovery bin (2) is fixedly connected. Inside the recovery bin (2), a filter bin (3) is fixedly connected. At the top of the filter bin (3), a feeding port (4) is provided. On the left side of the recovery bin (2), a power assembly is fixedly connected, and the power assembly is used to provide rotational power. On the right side of the power assembly, an auger (7) is fixedly connected. At the bottom of the recovery bin (2), a liquid discharge port (8) is opened. On the right side of the recovery bin (2), a discharge bin (9) is fixedly connected. At the bottom of the discharge bin (9), a discharge port (10) is provided. On the right side of the discharge bin (9), an extrusion bin (11) is fixedly connected. Inside the extrusion bin (11), a sliding circular block (12) is slidably connected. On the right side of the sliding circular block (12), a pressure adjustment assembly is fixedly connected, and the pressure adjustment assembly is used to adjust the extrusion pressure. On the left side of the sliding circular block (12), a connecting column (13) is fixedly connected. On the left side of the connecting column (13), an extrusion frustum (14) is fixedly connected.

2. The comprehensive utilization device of phosphogypsum according to claim 1, characterized in that: The pressure adjustment assembly includes an extrusion spring (15). The left end of the extrusion spring (15) is fixedly connected to the right side of the sliding circular block (12). The right end of the extrusion spring (15) is fixedly connected to an extrusion circular block (16). On the right side of the extrusion circular block (16), a threaded column (17) is fixedly connected. The outer circumference of the threaded column (17) is threadedly connected to a knob (18). A chute (19) is provided on the outer circumference of the threaded column (17). Inside the chute (19), a limiting block (20) is slidably connected.

3. The comprehensive utilization device of phosphogypsum according to claim 1, characterized in that: The outer circumference of the feeding port (4) is fixedly connected inside the recovery bin (2).

4. The comprehensive utilization device of phosphogypsum according to claim 1, characterized in that: The power assembly includes a motor bracket (5). The right side of the motor bracket (5) is fixedly connected to the left side of the recovery bin (2). Inside the motor bracket (5), a rotating motor (6) is fixedly connected. The left end of the auger (7) is fixedly connected to the right output shaft of the rotating motor (6).

5. The comprehensive utilization device of phosphogypsum according to claim 1, characterized in that: The outer circumference of the auger (7) is rotatably connected inside the filter bin (3).

6. The comprehensive utilization device of phosphogypsum according to claim 1, characterized in that: The right end opening of the filter bin (3) is in contact with the outer circumference of the extrusion frustum (14). The outer circumference of the extrusion frustum (14) is slidably connected inside the discharge bin (9).

7. The comprehensive utilization device of phosphogypsum according to claim 2, wherein: The outer circumference of the extrusion circular block (16) is slidably connected inside the extrusion bin (11).

8. The comprehensive utilization device of phosphogypsum according to claim 2, wherein: The outer circumference of the threaded column (17) is slidably connected inside the extrusion bin (11). The outside of the limiting block (20) is fixedly connected inside the extrusion bin (11).

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