A phosphate refining and purification device

Abstract

The invention discloses a phosphate refining and purification device, belonging to the technical field of purification devices, comprising an evaporating tank, wherein a resistor seat is sealed on the upper part of the evaporating tank, an extrusion mechanism is arranged on a driving mechanism, the extrusion mechanism is slidably arranged on a resistor tube, the driving mechanism is fixed on the resistor tube through a fixing plate, an upper limit mechanism is arranged at the bottom of the driving mechanism, a lower limit mechanism is arranged in an evaporating chamber, and a stirring mechanism is arranged between the upper limit mechanism and the lower limit mechanism. The invention collects and discharges most of the condensed water originally attached to the partition into a water accumulation chamber, thereby greatly reducing the amount of condensed water originally formed on the partition falling back into the evaporating tank, avoiding the condensed water that falls back for the second time from being heated and evaporated, accelerating the evaporation and crystallization speed of the refined phosphate solution in the purification process, greatly improving the production efficiency, and at the same time stirring the crystallized phosphate settled at the bottom of the evaporating chamber, thereby greatly reducing the occurrence of the crystallized phosphate agglomeration phenomenon.

Description

Technical Field

[0001] The invention relates to the technical field of purification devices, in particular to a phosphate refining and purification device. Background Art

[0002] Phosphate is a salt of phosphoric acid, which is widely used, especially in the medical field. For example, in pharmaceutical preparations, phosphate is often used as a buffer, and can also be used in hemodialysis, drug synthesis, etc. In the preparation process of phosphate, the phosphate raw material is neutralized to obtain a phosphate solution, and the precipitate in the phosphate solution is removed by precipitation and filtration to obtain a refined phosphate solution. The refined phosphate solution is then heated and evaporated to obtain crystals. This process is the purification process of phosphate, that is, the crystallized phosphate is separated from the evaporated water vapor. In order to ensure that the refined phosphate solution is not affected by the external environment, such as dust in the external air, the refined phosphate solution needs to be heated and evaporated in an evaporator. In order to discharge steam, a steam exhaust hole is opened on the evaporator to discharge steam. However, the prior art only heats the refined phosphate solution through a resistor tube to evaporate the solvent and crystallize the solute in the phosphate solution. However, the prior art has the following problems: first, in addition to a part of the steam generated by the heating of the phosphate solution being discharged through the steam exhaust hole, another part adheres to the upper part of the evaporator, and then forms condensed water and falls back into the evaporator, and needs to be evaporated again, which prolongs the evaporation and crystallization time during the purification of the phosphate solution and reduces the crystallization efficiency; second, the phosphate crystals gradually precipitated from the phosphate solution in the evaporator settle at the bottom of the evaporator, and the uneven heating inside and outside the phosphate crystals easily leads to local hardening, which affects the quality of the purified phosphate. Summary of the invention

[0003] In order to solve the technical problems mentioned in the above background technology, the present invention provides a phosphate refining and purification device, and the technical solution adopted is as follows:

[0004] The invention comprises an evaporator, a resistor seat is sealed on the upper part of the evaporator, a plurality of resistor tubes are arranged at the bottom of the resistor seat, the resistor tubes are located inside the evaporator, a partition is arranged between the evaporator and the resistor seat, the partition divides the inside of the evaporator into a water accumulation chamber and an evaporation chamber, the resistor tube runs through the partition and a seal is formed between the resistor tube and the partition, a plurality of water squeezing tubes are arranged on the partition, the bottom of the water squeezing tube is connected with the partition and the upper part is a closed structure, a sponge is arranged in the water squeezing tube, the upper part of the sponge is fixedly connected with the upper part of the water squeezing tube, a plurality of water squeezing holes are arranged on the water squeezing tube along the circumferential direction, and the resistor seat is provided with a plurality of water squeezing holes. An exhaust hole is provided, a driving mechanism is provided in the exhaust hole, an electric push rod is provided on the upper side of the resistor seat, the electric push rod is connected to the driving mechanism, an extrusion mechanism is provided on the driving mechanism, the extrusion mechanism is slidably provided on the resistor tube, a through hole is provided at the center of the partition, the driving mechanism passes through the through hole, the driving mechanism is fixed to the resistor tube through a fixing plate, an upper limit mechanism is provided at the bottom of the driving mechanism, a lower limit mechanism is provided in the evaporation chamber, a stirring mechanism is provided between the upper limit mechanism and the lower limit mechanism, and one end of the driving mechanism passes through the upper limit mechanism, the stirring mechanism and the lower limit mechanism.

[0005] Preferably, the driving mechanism includes a fixed tube, which is fixed to the resistance tube through a fixed plate, a lifting rod is slidably arranged in the fixed tube, the lifting rod passes through the exhaust hole and the through hole, the electric push rod is connected to the lifting rod, a sealing ring is arranged between the fixed tube and the lifting rod, a spiral sheet is arranged in the fixed tube, the spiral sheet is connected to the lifting rod, and the spiral sheet extends to the outside of the fixed tube and passes through the upper limit mechanism, the stirring mechanism and the lower limit mechanism.

[0006] Preferably, the extrusion mechanism includes a plurality of transverse connecting rods, a plurality of longitudinal connecting rods are arranged on the transverse connecting rods, a columnar extrusion block is arranged on the longitudinal connecting rods, a sliding sleeve is arranged on the resistor tube, and the sliding sleeves are connected to each other through the transverse connecting rods.

[0007] Preferably, the upper limit mechanism comprises an upper limit column connected to the fixed tube, an upper limit hole is arranged in the upper limit column, and the spiral sheet passes through the upper limit hole.

[0008] Preferably, the stirring mechanism comprises a rotating disk, a spiral hole is arranged on the rotating disk, a spiral sheet passes through the spiral hole and is spirally connected with the spiral hole, stirring paddles are arranged around the rotating disk, and a stirring rod is arranged on the stirring paddles.

[0009] Preferably, the lower limit mechanism comprises a lower limit column, a lower limit hole is arranged in the lower limit column, the upper part of the lower limit hole is an open structure and the bottom is a closed structure, and one end of the spiral sheet is arranged in the lower limit hole.

[0010] Preferably, a first fixing rod is provided on the lower limit column, and the first fixing rod is fixed to the bottom of the evaporation tank.

[0011] Preferably, a second fixing rod is provided on the electric push rod, and the second fixing rod is fixed on the upper part of the resistor seat.

[0012] Preferably, a drain pipe is provided on the water accumulation chamber, a liquid inlet pipe is provided on the evaporation chamber, a discharge pipe is provided at the bottom of the evaporation chamber, and a valve is provided on the discharge pipe.

[0013] Preferably, a manhole is provided on the evaporation tank.

[0014] The invention has the following advantages: after the refined phosphate solution is heated by the resistance tube in the evaporation chamber, the solvent part evaporates into water vapor and is discharged through the exhaust hole, and a large part enters the squeezing pipe to collide with the sponge to form condensed water and then is absorbed by the sponge. Every 3 minutes, the electric push rod pushes the driving mechanism to move upward, the driving mechanism drives the squeezing mechanism to move upward, the squeezing mechanism squeezes the sponge, so that the condensed water adsorbed in the sponge is squeezed out and enters the water accumulation chamber through the squeezing hole. At the same time, the driving device drives the stirring device to rotate to stir the crystallized phosphate settled at the bottom of the evaporation chamber. The invention collects most of the condensed water originally attached to the partition and discharges it into the water accumulation chamber, greatly reducing the amount of condensed water originally formed on the partition falling back into the evaporation tank, avoiding the condensed water that falls back for the second time from being heated and evaporated again, accelerating the evaporation and crystallization speed of the refined phosphate solution in the purification process, greatly improving the production efficiency, and at the same time stirring the crystallized phosphate settled at the bottom of the evaporation chamber, greatly reducing the occurrence of the crystallized phosphate agglomeration phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the internal structure diagram of the present invention;

[0016] Figure 2 The cross-sectional view of the present invention Figure 1 ;

[0017] Figure 3 For the present invention Figure 2 A partial enlarged view of point a in the middle;

[0018] Figure 4 The cross-sectional view of the present invention Figure 2 ;

[0019] Figure 5 For the present invention Figure 4 A partial enlarged view of point b in the middle;

[0020] Figure 6 It is a front view of the present invention;

[0021] Figure 7 A bottom view of the partition of the present invention;

[0022] Figure 8 A top view of the extrusion mechanism of the present invention;

[0023] Fig. 9 A top view of the driving mechanism of the present invention;

[0024] Fig.10 A top view of the stirring mechanism of the present invention;

[0025] Fig.11 It is a top view of the combination of the driving mechanism and the stirring mechanism of the present invention.

[0026] Figures: 1 evaporation tank, 2 resistor seat, 3 resistor tube, 4 partition, 5 water accumulation chamber, 6 evaporation chamber, 7 water squeezing pipe, 8 sponge, 9 water squeezing hole, 10 exhaust hole, 11 electric push rod, 12 through hole, 13 fixed plate, 14 fixed tube, 15 lifting rod, 16 sealing ring, 17 spiral sheet, 18 transverse connecting rod, 19 longitudinal connecting rod, 20 cylindrical extrusion block, 21 sliding sleeve, 22 upper limit column, 23 upper limit hole, 24 turntable, 25 spiral hole, 26 stirring paddle, 27 stirring rod, 28 lower limit column, 29 lower limit hole, 30 first fixed rod, 31 second fixed rod, 32 drain pipe, 33 liquid inlet pipe, 34 discharge pipe, 35 valve, 36 manhole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Please refer to Figure 1-7 The present invention provides a phosphate refining and purification device, comprising an evaporator 1, a resistor seat 2 is sealed on the upper part of the evaporator 1, a plurality of resistor tubes 3 are arranged at the bottom of the resistor seat 2, the resistor tubes 3 are located inside the evaporator 1, the resistor seat 2 provides power to the resistor tubes 3, so that the resistor tubes 3 are energized and heated, a partition 4 is arranged between the evaporator 1 and the resistor seat 2, the partition 4 divides the inside of the evaporator 1 into a water accumulation chamber 5 and an evaporation chamber 6, the refined phosphate solution enters the evaporation chamber 6 and is heated by the resistor tube 3, so that the solvent in the refined phosphate solution evaporates into water vapor, and the solute in the phosphate solution crystallizes, the resistor tube 3 penetrates the partition 4 and a seal is formed between the resistor tube 3 and the partition 4, a plurality of water squeezing tubes 7 are arranged on the partition 4, the bottom of the water squeezing tube 7 is connected to the partition 4, and the upper part is a closed structure, a sponge 8 is arranged in the water squeezing tube 7, the sponge 8 is abutted against the inner wall of the water squeezing tube 7 on all sides, the upper part of the sponge 8 is fixedly connected to the upper part of the water squeezing tube 7, so that the sponge 8 will not fall from the water squeezing tube 7, and the sponge used is a high temperature resistant sponge 8.

[0029] A plurality of water squeezing holes 9 are arranged along the circumferential direction on the water squeezing pipe 7, a steam exhaust hole 10 is arranged on the resistor seat 2, a driving mechanism is arranged in the steam exhaust hole 10, and the diameter of the part of the driving mechanism located in the steam exhaust hole 10 is smaller than the diameter of the steam exhaust hole 10, so that the driving mechanism can move in the steam exhaust hole 10 without affecting the discharge of steam from the steam exhaust hole 10, an electric push rod 11 is arranged on the upper side of the resistor seat 2, the electric push rod 11 is connected to the driving mechanism, and the electric push rod 11 drives the driving mechanism to move up every 3 minutes, and an extrusion mechanism is arranged on the driving mechanism, and the extrusion mechanism is slidably arranged on the resistor tube 3, and the driving mechanism drives the extrusion mechanism to move up, so that the extrusion mechanism enters the water squeezing pipe 7 and squeezes the sponge 8, and the extrusion mechanism is slidably arranged on the resistor tube 3 to make the extrusion mechanism more stable during the rising process , to avoid vibration, a through hole 12 is provided at the center of the partition 4, and the driving mechanism passes through the through hole 12. The diameter of the through hole 12 is larger than the diameter of the driving mechanism, so that the driving mechanism passes through the through hole 12 without affecting the passage of water vapor through the through hole 12. The driving mechanism is fixed to the resistor tube 3 through a fixing plate 13, and an upper limit mechanism is provided at the bottom of the driving mechanism. A lower limit mechanism is provided in the evaporation chamber 6, and a stirring mechanism is provided between the upper limit mechanism and the lower limit mechanism. One end of the driving mechanism passes through the upper limit mechanism, the stirring mechanism and the lower limit mechanism, and the upper limit mechanism and the lower limit mechanism sandwich the stirring mechanism in the middle to form a movable seal, so that when the stirring mechanism is driven to rotate by the driving mechanism, the external phosphate solution cannot enter the upper limit mechanism, the stirring mechanism and the lower limit mechanism.

[0030] The driving mechanism includes a fixed tube 14, which is fixed on the resistor tube 3 through a fixed plate 13. A lifting rod 15 is slidably arranged in the fixed tube 14, and the lifting rod 15 passes through the exhaust hole 10 and the through hole 12. The electric push rod 11 is connected to the lifting rod 15, and the electric push rod 11 drives the lifting rod 15 to move up and down in the fixed tube 14. A sealing ring 16 is arranged between the fixed tube 14 and the lifting rod 15, so that the external phosphate solution cannot enter the fixed tube 14 when the lifting rod 15 moves upward in the fixed tube 14. A spiral piece 17 is arranged in the fixed tube 14, and the spiral piece 17 is connected to the lifting rod 15. The spiral piece 17 extends to the outside of the fixed tube 14 and passes through the upper limit mechanism, the stirring mechanism and the lower limit mechanism. The spiral piece 17 moves up and down as the lifting rod 15 moves up and down, and the spiral piece drives the stirring mechanism to rotate.

[0031] Please refer to Figure 2 and 8The extrusion mechanism includes a plurality of transverse connecting rods 18, a plurality of longitudinal connecting rods 19 are arranged on the transverse connecting rods 18, a columnar extrusion block 20 is arranged on the longitudinal connecting rods 19, a sliding sleeve 21 is arranged on the resistor tube 3, and the sliding sleeves 21 are connected with each other through the transverse connecting rods 18. The lifting rod 15 drives the transverse connecting rods 18 to move up and down, and the transverse connecting rods 18 drive the sliding sleeves 21 to move up and down on the resistor tube 3. At the same time, the transverse connecting rods 18 drive the longitudinal connecting rods 19, and the longitudinal connecting rods 19 drive the columnar extrusion block 20. The columnar extrusion block 20 enters the water squeezing pipe 7 and the columnar extrusion block 20 is close to the inner wall of the water squeezing pipe 7. The columnar extrusion block 20 squeezes the sponge 8.

[0032] Please refer to Figure 3 , 5 9, the upper limit mechanism includes an upper limit column 22 connected to the fixed tube 14, an upper limit hole 23 is provided in the upper limit column 22, the spiral piece 17 passes through the upper limit hole 23, the upper limit column 22 limits the upper part of the stirring mechanism, the diameter of the limiting hole 23 is larger than the diameter of the spiral piece 17, and the spiral piece 17 passes through the center of the upper limit hole 23 without contacting the upper limit hole 23.

[0033] Please refer to Figure 1 , 2 , 10 and 11, the stirring mechanism includes a turntable 24, the turntable 24 is provided with a spiral hole 25, the spiral piece 17 passes through the spiral hole 25 and is spirally connected with the spiral hole 25, the turntable 24 rotates during the up and down pulling of the spiral piece 17 in the spiral hole 25, the turntable 24 is provided with a stirring paddle 26 around the turntable 24, the stirring paddle 26 is provided with a stirring rod 27, the rotation of the turntable 24 drives the stirring paddle 26 to rotate, and the stirring paddle 26 drives the stirring rod 27 to rotate.

[0034] The lower limit mechanism includes a lower limit column 28, a lower limit hole 29 is arranged in the lower limit column 28, and the upper part of the lower limit hole 29 is an open structure and the bottom is a closed structure, so as to prevent the external phosphate solution from entering the lower limit hole 29 through the bottom of the lower limit hole 29, and one end of the spiral piece 17 is arranged in the lower limit hole 29, and the spiral piece 17 does not contact the bottom of the lower limit hole 29 when it moves to the lower end, and the diameter of the lower limit hole 29 is larger than the diameter of the spiral piece 17, and the spiral piece 17 does not contact the lower limit hole 29 when passing through the center of the lower limit hole 29, and a movable seal is formed between the upper limit column 22 and the turntable 24, and a movable seal is formed between the lower limit column 28 and the turntable 24.

[0035] A first fixing rod 30 is disposed on the lower limit column 28 . The first fixing rod 30 is fixed to the bottom of the evaporation tank 1 , and the lower limit column 28 is fixed by the first fixing rod 30 .

[0036] The electric push rod 11 is provided with a second fixing rod 31 , which is fixed to the upper part of the resistor seat 2 . The electric push rod 11 is fixed to the upper side of the resistor seat 2 through the second fixing rod 31 .

[0037] Please refer to Figure 1 A drain pipe 32 is provided on the water accumulation chamber 5, and the condensed water in the water accumulation chamber 5 is quickly discharged through the drain pipe 32. A liquid inlet pipe 33 is provided on the evaporation chamber 6, and the refined phosphate solution enters the evaporation chamber 6 through the liquid inlet pipe 33. A discharge pipe 34 is provided at the bottom of the evaporation chamber 6, and a valve 35 is provided on the discharge pipe 34. After the solvent in the evaporation chamber 6 is evaporated and discharged, only crystallized phosphate is left in the evaporation chamber 6. By opening the valve 35, the crystallized phosphate in the evaporation chamber 6 is discharged through the discharge pipe 34.

[0038] Please refer to Figure 6 A manhole 36 is provided on the evaporation tank 1 , and the interior of the evaporation tank 1 can be entered by opening the manhole 36 to inspect and repair the interior of the evaporation tank 1 .

[0039] Working principle of the present invention:

[0040] Please refer to Figure 1 and 2 , power is supplied to the resistor tube 3 through the resistor seat 2, the resistor tube 3 generates heat, and the refined phosphate solution enters the evaporation chamber 6 through the liquid inlet pipe 33. As the liquid level increases, the phosphate solution contacts the resistor tube 3, and the resistor tube 3 heats the phosphate solution until the phosphate solution is injected into two-thirds of the volume of the evaporation chamber 6, and the injection of the refined phosphate solution into the evaporation chamber 6 is stopped. As the phosphate solution is continuously heated, the solvent part of the phosphate solution is evaporated to form water vapor, and the solute part of the phosphate solution is crystallized into particles and settled at the bottom of the evaporation chamber 6. Part of the water vapor is discharged through the through hole 12 and the exhaust hole 10, and another part enters the water squeezing pipe 7, hits the sponge 8 and forms condensed water which is absorbed by the sponge 8.

[0041] Please refer to Figure 4Every 3 minutes, the electric push rod 11 starts and drives the lifting rod 15 to rise in the fixed tube 14, the lifting rod 15 drives the transverse connecting rod 18, the transverse connecting rod 18 drives the longitudinal connecting rod 19, the longitudinal connecting rod 19 drives the columnar extrusion block 20 to move up, the columnar extrusion block 20 enters the squeezing pipe 7, and squeezes the sponge 8 upward, so that the condensed water in the sponge 8 is squeezed out and falls into the water chamber 5 through the squeezing hole 9, and then discharged through the drain pipe 32. At the same time, the lifting rod 15 drives the spiral piece 17 to move up, and the spiral piece passes through the upper limit hole 23, the spiral hole 25 and the lower limit hole 29, so that the turntable 24 rotates between the upper limit column 22 and the lower limit column 28. The rotating disk 24 drives the stirring paddle 26, and the stirring paddle 26 drives the stirring rod 27 to rotate. The stirring rod 27 stirs the crystallized part in the phosphate solution, and then the electric push rod 11 drives the lifting rod 15 and the spiral piece 17 to move downward, the columnar extrusion block 20 leaves the water squeezing tube 7 and returns to its position, and the sponge 8 also rebounds and returns to its position. The spiral piece 17 still drives the rotating disk 24 to rotate during the downward movement until the spiral piece 17 stops moving downward. It is worth pointing out that a small part of the water vapor will still be squeezed out of the partition 4 during the rising process to form condensed water and then fall back into the evaporation chamber 6, but the present invention aims to remove most of the condensed water to make the crystallization efficiency of the phosphate solution higher.

[0042] When the solvent in the evaporation chamber 6 is partially evaporated, crystallized phosphate remains in the evaporation chamber 6 , and the valve 36 is opened to discharge the crystallized phosphate in the evaporation chamber 6 through the discharge pipe 34 .

[0043] The present invention is simple to operate, convenient to use, and suitable for comprehensive promotion and application. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A phosphate refining and purification device, comprising an evaporation tank (1), wherein a resistor seat (2) is sealed on the upper part of the evaporation tank (1), a plurality of resistor tubes (3) are arranged at the bottom of the resistor seat (2), and the resistor tubes (3) are located inside the evaporation tank (1), characterized in that: A partition (4) is provided between the evaporation tank (1) and the resistor seat (2), the partition (4) dividing the interior of the evaporation tank (1) into a water accumulation chamber (5) and an evaporation chamber (6), the resistor tube (3) passes through the partition (4) and a seal is formed between the resistor tube (3) and the partition (4), a plurality of water squeezing pipes (7) are provided on the partition (4), the bottom of the water squeezing pipe (7) is connected to the partition (4) and the upper part is a closed structure, a sponge (8) is provided in the water squeezing pipe (7), the upper part of the sponge (8) is fixedly connected to the upper part of the water squeezing pipe (7), a plurality of water squeezing holes (9) are provided on the water squeezing pipe (7) along the circumferential direction, and a steam exhaust hole (10) is provided on the resistor seat (2). A driving mechanism is arranged in the exhaust hole (10), an electric push rod (11) is arranged on the upper side of the resistor seat (2), the electric push rod (11) is connected to the driving mechanism, an extrusion mechanism is arranged on the driving mechanism, the extrusion mechanism is slidably arranged on the resistor tube (3), a through hole (12) is arranged at the center of the partition (4), the driving mechanism passes through the through hole (12), the driving mechanism is fixed to the resistor tube (3) through a fixing plate (13), an upper limit mechanism is arranged at the bottom of the driving mechanism, a lower limit mechanism is arranged in the evaporation chamber (6), a stirring mechanism is arranged between the upper limit mechanism and the lower limit mechanism, and one end of the driving mechanism passes through the upper limit mechanism, the stirring mechanism and the lower limit mechanism; The extrusion mechanism comprises a plurality of transverse connecting rods (18), a plurality of longitudinal connecting rods (19) are arranged on the transverse connecting rods (18), a columnar extrusion block (20) is arranged on the longitudinal connecting rods (19), a sliding sleeve (21) is arranged on the resistor tube (3), and the sliding sleeves (21) are connected to each other via the transverse connecting rods (18); The driving mechanism comprises a fixed tube (14), the fixed tube (14) being fixed to the resistor tube (3) via a fixed plate (13), a lifting rod (15) being slidably arranged in the fixed tube (14), the lifting rod (15) passing through the exhaust hole (10) and the through hole (12), the electric push rod (11) being connected to the lifting rod (15), a sealing ring (16) being arranged between the fixed tube (14) and the lifting rod (15), a spiral sheet (17) being arranged in the fixed tube (14), the spiral sheet (17) being connected to the lifting rod (15), and the spiral sheet (17) extending to the outside of the fixed tube (14) and passing through the upper limit mechanism, the stirring mechanism and the lower limit mechanism.

2. A phosphate refining and purification device according to claim 1, characterized in that: The upper limit mechanism comprises an upper limit column (22) connected to the fixed tube (14), an upper limit hole (23) is provided in the upper limit column (22), and the spiral sheet (17) passes through the upper limit hole (23).

3. A phosphate refining and purification device according to claim 2, characterized in that: The stirring mechanism comprises a rotating disk (24), the rotating disk (24) is provided with a spiral hole (25), the spiral blade (17) passes through the spiral hole (25) and is spirally connected to the spiral hole (25), stirring paddles (26) are arranged around the rotating disk (24), and a stirring rod (27) is arranged on the stirring paddle (26).

4. A phosphate refining and purification device according to claim 2, characterized in that: The lower limit mechanism comprises a lower limit column (28), a lower limit hole (29) is arranged in the lower limit column (28), the upper portion of the lower limit hole (29) is an open structure and the bottom portion is a closed structure, and one end of the spiral piece (17) is arranged in the lower limit hole (29).

5. A phosphate refining and purification device according to claim 4, characterized in that: A first fixing rod (30) is provided on the lower limit column (28), and the first fixing rod (30) is fixed to the bottom of the evaporation tank (1).

6. A phosphate refining and purification device according to claim 1, characterized in that: The electric push rod (11) is provided with a second fixing rod (31), and the second fixing rod (31) is fixed to the upper part of the resistor seat (2).

7. A phosphate refining and purification device according to claim 1, characterized in that: The water accumulation chamber (5) is provided with a drainage pipe (32), the evaporation chamber (6) is provided with a liquid inlet pipe (33), the bottom of the evaporation chamber (6) is provided with a discharge pipe (34), and the discharge pipe (34) is provided with a valve (35).

8. A phosphate refining and purification device according to claim 1, characterized in that: The evaporation tank (1) is provided with a manhole (36).

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