Integrated purification equipment for phosphoric acid decolorization and impurity removal

Abstract

This invention relates to the field of phosphoric acid purification technology, specifically to an integrated purification device for phosphoric acid decolorization and impurity removal. The device includes a reaction unit comprising a reaction vessel and a detachable lid mounted on top of the reaction vessel, and a feeding unit comprising a storage hopper fixedly mounted at the bottom of the lid. A discharge pipe is installed at the bottom of the storage hopper, and a transfer pipe is rotatably mounted at the bottom of the discharge pipe. A rotating rod for driving the transfer pipe to rotate is rotatably mounted on the discharge pipe, and a spreading pipe is rotatably mounted on the left side of the transfer pipe. This invention uses the rotating rod to drive the transfer pipe to rotate. When the transfer pipe rotates, a swinging component drives the spreading pipe to swing back and forth. The rotation of the transfer pipe continuously adjusts the direction of the spreading pipe's swing, thereby expanding the range of activated carbon spreading, which is beneficial for improving the uniformity of the mixture of activated carbon and phosphoric acid, and thus improving the decolorization and impurity removal effect of the activated carbon.

Description

Technical Field

[0001] This invention relates to the field of phosphoric acid purification technology, specifically to an integrated purification device for phosphoric acid decolorization and impurity removal. Background Technology

[0002] Phosphoric acid is a common inorganic acid, a colorless, odorless, and transparent liquid. It is a moderately strong acid, mainly used in the pharmaceutical, food, and fertilizer industries, and can also be used as a chemical reagent. Decolorization and impurity removal of phosphoric acid is a key process for improving its purity and appearance. The core objective is to remove pigment impurities (such as organic matter and metal ion complexes) and suspended solids.

[0003] In wet-process phosphoric acid production, the main sources of pigment impurities are the decomposition products of organic matter in phosphate rock and colored complexes formed by iron / aluminum ions and phosphate groups. Adsorption is the most commonly used decolorization method, utilizing the porous structure or surface active sites of adsorbents to adsorb pigments and some ionic impurities. Adsorption is divided into physical adsorption and chemical adsorption, with activated carbon being a commonly used physical adsorbent.

[0004] Removing arsenic impurities from phosphoric acid is a crucial step in improving its purity (especially for food-grade and electronic-grade phosphoric acid). Industrially, the removal process depends on the type of phosphoric acid (wet / thermal process), arsenic content, and its form (As). 3+ / As 5+ The core idea of ​​selecting a targeted process is to convert arsenic into insoluble substances or separate phases through precipitation, extraction, and adsorption. When using a stepwise process to remove pigment and arsenic impurities from phosphoric acid, decolorization is required before arsenic removal, which is a complex process involving two reaction steps and two filtrations, resulting in high production costs. Summary of the Invention

[0005] To address the aforementioned problems, the present invention provides an integrated purification device for phosphoric acid decolorization and impurity removal, comprising a reaction unit, wherein the reaction unit includes a reaction vessel and a detachable lid mounted on top of the reaction vessel.

[0006] The feeding unit includes a storage hopper fixedly installed at the bottom of the can lid, a discharge pipe installed at the bottom of the storage hopper, a transfer pipe rotatably installed at the bottom of the discharge pipe, a rotating rod rotatably installed on the discharge pipe for driving the transfer pipe to rotate, a sprinkling pipe rotatably installed on the left side of the transfer pipe, and a swinging component installed on the discharge pipe to drive the sprinkling pipe to swing back and forth as the transfer pipe rotates.

[0007] A stirring unit, the stirring unit including a stirring shaft rotatably mounted at the bottom of the reaction unit.

[0008] The transmission unit includes a protective cover fixedly installed at the bottom of the tank lid. A movable rod is slidably mounted on the bottom of the protective cover. A guide sleeve is fixedly connected to the top of the rotating rod. The bottom of the movable rod is movably connected to the top of the guide sleeve. Symmetrical sliding keys are slidably mounted on the outer ring wall of the movable rod. A keyway is provided on the inner wall of the guide sleeve, located directly below the sliding keys and engaging with them. An elastic component for pushing the sliding keys downward is installed on the movable rod. An electromagnetic push rod for driving the movable rod up and down is fixedly installed on the tank lid. A transmission component is drivingly connected between the stirring shaft and the movable rod.

[0009] The feed tube is also equipped with an opening and closing unit that controls the opening and closing of the feed tube by moving up and down with the movable rod.

[0010] In one possible implementation, a discharge port is fixedly installed at the bottom of the reactor, and the tank cover is bolted to the top of the reactor. A feed inlet 1, a feed inlet 2, and an exhaust port are fixedly installed on the top of the tank cover, and the feed inlet 1 communicates with the top of the storage hopper.

[0011] In one possible implementation, the transfer pipe is L-shaped, the spreading pipe is rotatably connected to the left end of the horizontal section of the transfer pipe, the bottom of the spreading pipe is provided with a spreading port, the bottom end of the rotating rod is Y-shaped and fixedly connected to the inner wall of the transfer pipe, and the top end of the rotating rod rotates through to the top of the discharge pipe and is fixedly connected to the guide sleeve.

[0012] In one possible implementation, the oscillating assembly includes a swing arm fixedly mounted on the top of the dispensing pipe, a turntable rotatably mounted on the left side of the transfer pipe, a groove on the swing arm, a sliding rod rotatably connected to the left edge of the turntable, the sliding rod being slidably mounted in the groove, a bevel gear coaxially fixedly connected to the right side of the turntable, and a bevel gear ring sleeved on the outside of the transfer pipe fixedly connected to the bottom of the dispensing pipe, the bevel gear meshing with the bevel gear ring.

[0013] In one possible implementation, the elastic component includes a fixed ring fixedly mounted on the outer ring wall of the movable rod and located at the top of the slide key, a movable ring sleeved on the outside of the movable rod being fixedly connected to the top of the left and right slide keys, and a return spring sleeved on the outside of the movable rod being fixedly connected between the fixed ring and the movable ring.

[0014] In one possible implementation, the transmission assembly includes a driven gear fixedly mounted on a movable rod, a driving gear fixedly mounted on the stirring shaft, the driven gear meshing with the driving gear, the bottom end of the electromagnetic push rod telescopic shaft being rotatably connected to the top of the movable rod, and the driven gear, driving gear, and electromagnetic push rod all being located inside the protective cover.

[0015] In one possible implementation, the opening and closing unit includes a baffle rotatably mounted on the feed pipe for controlling the opening and closing of the feed pipe, a side rod fixedly connected to the rear side of the movable rod, a connecting rod rotatably connected to the rear end of the side rod, a rotating arm fixedly connected to the rear side of the baffle, and the bottom end of the connecting rod rotatably connected to the end of the rotating arm away from the baffle.

[0016] In one possible implementation, a drive motor is fixedly mounted on the top of the tank lid, and the bottom of the output shaft of the drive motor rotates through to the bottom of the tank lid and is then connected to the top of the stirring shaft via a coupling.

[0017] The beneficial effects of this invention are as follows: 1. This invention drives the rotating pipe to rotate via a rotating rod. When the rotating pipe rotates, the oscillating component drives the spreading pipe to swing back and forth. When the rotating pipe rotates, the direction of the spreading pipe can be continuously adjusted, thereby expanding the range of activated carbon spreading. This is beneficial to improving the uniformity of the mixing of activated carbon and phosphoric acid, thereby improving the effect of activated carbon decolorization and impurity removal. Activated carbon adsorbs organic pigments in phosphoric acid to decolorize it. At the same time, the porous structure of activated carbon can also adsorb and encapsulate arsenic sulfide precipitate particles, improving the solid-liquid separation efficiency.

[0018] 2. In this invention, activated carbon is first stored in a storage hopper, and then phosphoric acid and phosphorus pentasulfide are added to the reaction vessel for reaction. The opening and closing of the feed pipe is controlled by an opening and closing unit, so that the activated carbon is added to the phosphoric acid later. The phosphorus pentasulfide and activated carbon are added sequentially, allowing arsenic ions to precipitate first, and then the activated carbon adsorbs pigments and fine precipitate particles. This avoids the activated carbon absorbing hydrogen sulfide gas, which can improve the arsenic removal rate. Since the activated carbon is placed in the storage hopper in advance, it is not necessary to open the feed port to add activated carbon during the reaction process, avoiding hydrogen sulfide gas leakage and improving safety. The integrated process reduces the reaction steps. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a front sectional view of the present invention.

[0021] Figure 3 This is a front sectional view of the feeding unit of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the feeding unit of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the transmission unit of the present invention.

[0024] Figure 6 This is a partial cross-sectional view of the guide sleeve of the present invention.

[0025] Figure 7 This is a partial cross-sectional view of the elastic component of the present invention.

[0026] Figure 8 This is a three-dimensional structural diagram of the opening and closing unit of the present invention.

[0027] In the diagram: 1. Reaction unit; 11. Reactor; 12. Discharge port; 13. Tank lid; 131. Feed inlet 1; 132. Feed inlet 2; 133. Exhaust port; 2. Feeding unit; 21. Storage hopper; 211. Feed pipe; 22. Transfer pipe; 23. Rotating rod; 24. Spreading pipe; 25. Swing assembly; 251. Swing arm; 252. Turntable; 253. Slide groove; 254. Slide rod; 255. Bevel gear; 256. Bevel gear ring; 3. Stirring Unit; 31. Stirring shaft; 32. Drive motor; 4. Transmission unit; 41. Protective cover; 42. Movable rod; 421. Sliding key; 43. Guide sleeve; 431. Keyway; 44. Elastic component; 441. Fixed ring; 442. Moving ring; 443. Return spring; 45. Electromagnetic push rod; 46. Transmission component; 461. Driven gear; 462. Drive gear; 5. Opening and closing unit; 51. Baffle; 52. Side rod; 53. Connecting rod; 54. Rotating arm. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Please see Figure 1 - Figure 8 An integrated purification device for phosphoric acid decolorization and impurity removal includes a reaction unit 1, which comprises a reaction vessel 11 and a detachable lid 13 mounted on top of the reaction vessel 11. It should be noted that the reaction vessel 11 has a heating function.

[0030] Feeding unit 2 includes a storage hopper 21 fixedly installed at the bottom of the can cover 13. A discharge pipe 211 is installed at the bottom of the storage hopper 21. The discharge pipe 211 is inclined to the lower right. A transfer pipe 22 is rotatably installed at the bottom of the discharge pipe 211. A rotating rod 23 for driving the transfer pipe 22 to rotate is rotatably installed on the discharge pipe 211. A sprinkling pipe 24 is rotatably installed on the left side of the transfer pipe 22. A swinging component 25 is also installed on the discharge pipe 211 to drive the sprinkling pipe 24 to swing back and forth as the transfer pipe 22 rotates.

[0031] The stirring unit 3 includes a stirring shaft 31 that is rotatably mounted at the bottom of the reaction unit 1.

[0032] The transmission unit 4 includes a protective cover 41 fixedly installed at the bottom of the tank cover 13. A movable rod 42 is slidably installed on the bottom of the protective cover 41. A guide sleeve 43 is fixedly connected to the top of the rotating rod 23. The bottom of the movable rod 42 is movably connected to the top of the guide sleeve 43. A left-right symmetrical sliding key 421 is slidably installed on the outer ring wall of the movable rod 42. A keyway 431 located directly below the sliding key 421 and interlocking with it is opened on the inner wall of the guide sleeve 43. An elastic component 44 for pushing the sliding key 421 to move downward is installed on the movable rod 42. An electromagnetic push rod 45 for driving the movable rod 42 to move up and down is fixedly installed on the tank cover 13. A transmission component 46 is connected between the stirring shaft 31 and the movable rod 42.

[0033] The feed pipe 211 is also equipped with an opening and closing unit 5 that controls the opening and closing of the feed pipe 211 by moving up and down with the movable rod 42.

[0034] In practical use, initially, the feed pipe 211 is closed, and activated carbon is stored in the storage hopper 21. Then, 85% phosphoric acid is added to the reaction vessel 11, and phosphorus pentasulfide is added at the same time as the acid is added. After the liquid level is reached, the acid is stopped, the timing of the reaction is started, the stirring shaft 31 is turned on to stir, and the reaction vessel 11 is heated to the acid temperature of 70-75℃ and then kept at the temperature. Phosphorus pentasulfide will hydrolyze when it comes into contact with water / phosphoric acid to generate hydrogen sulfide and phosphoric acid. The hydrogen sulfide then reacts with arsenic ions in the solution to generate insoluble arsenic sulfide precipitate.

[0035] After a period of reaction, the electromagnetic push rod 45 pushes the movable rod 42 downward. The movable rod 42 controls the opening of the feed pipe 211 through the opening and closing unit 5, so that the activated carbon in the storage hopper 21 is discharged downward into the reaction vessel 11 through the feed pipe 211, the transfer pipe 22 and the sprinkling pipe 24. The activated carbon adsorbs the organic pigments in the phosphoric acid, thus decolorizing the phosphoric acid. At the same time, the porous structure of the activated carbon can also adsorb and encapsulate arsenic sulfide precipitate particles, improving the solid-liquid separation efficiency. By adding phosphorus pentasulfide and activated carbon in sequence, arsenic ions are first precipitated, and then the activated carbon adsorbs the pigments and fine precipitate particles, avoiding the absorption of hydrogen sulfide gas by the activated carbon, which can improve the arsenic removal rate.

[0036] When the stirring shaft 31 stirs, it drives the movable rod 42 to rotate via the transmission assembly 46. Before the movable rod 42 moves downward, the sliding key 421 and the keyway 431 are separated, and the guide sleeve 43 does not rotate with the movable rod 42. When the movable rod 42 moves downward, it drives the sliding key 421 to move downward together. During the rotation of the sliding key 421 driven by the movable rod 42, if the sliding key 421 is not aligned with the keyway 431, the elastic component 44 will be compressed, so that the elastic component 44 provides a spring force to the sliding key 421 to move downward. When the sliding key 421 is aligned vertically with the keyway 431, the elastic force of the elastic component 44 pushes the sliding key 421 downward, so that the sliding key 421 is inserted into the keyway 431. At this time, the movable rod 42 drives the guide sleeve 43 and the rotating rod 23 to rotate through the sliding key 421, so that the rotating rod 23 drives the transfer pipe 22 to rotate. When the transfer pipe 22 rotates, it drives the spreading pipe 24 to swing back and forth through the swing component 25, which expands the spreading range of activated carbon, which is conducive to improving the uniformity of the mixture of activated carbon and phosphoric acid, thereby improving the effect of activated carbon decolorization and impurity removal.

[0037] Please see Figure 1 and Figure 2 A discharge port 12 is fixedly installed at the bottom of the reactor 11. A lid 13 is bolted to the top of the reactor 11. A feed inlet 131, a second feed inlet 132, and an exhaust port 133 are fixedly installed on the top of the lid 13. Feed inlet 131 is connected to the top of the storage hopper 21. It should be noted that discharge port 12 and feed inlet 131 need to be sealed during the reaction. Feed inlet 132 is connected to the existing supply pipeline, and exhaust port 133 is connected to the existing tail gas absorption device. The supply pipeline is used to transport phosphoric acid and phosphorus pentasulfide, and the tail gas absorption device is used to collect and absorb the tail gas generated during the reaction.

[0038] In practical use, activated carbon is added to the storage hopper 21 through the feed inlet 131, and phosphoric acid and phosphorus pentasulfide are added to the reaction vessel 11 through the feed inlet 132. The hydrogen sulfide tail gas is absorbed and purified by the tail gas absorption device through the exhaust port 133. The reacted phosphoric acid and precipitate are discharged from the discharge port 12 and then enter the subsequent filtration process.

[0039] Please see Figure 2 , Figure 3 and Figure 4 The transfer pipe 22 is L-shaped, and the spreading pipe 24 is rotatably connected to the left end of the horizontal section of the transfer pipe 22. The bottom of the spreading pipe 24 is provided with a spreading port. The bottom end of the rotating rod 23 is Y-shaped and fixedly connected to the inner wall of the transfer pipe 22. The top end of the rotating rod 23 rotates through to the top of the discharge pipe 211 and is fixedly connected to the guide sleeve 43.

[0040] In practical use, by designing the transfer pipe 22 as an L-shape, when the transfer pipe 22 rotates, the horizontal section of the transfer pipe 22 can use centrifugal force to throw the activated carbon outward, which is beneficial for the feeding of activated carbon; by setting a feeding port at the bottom of the feeding pipe 24, when the feeding pipe 24 swings back and forth, the feeding port can spread the activated carbon over a large area, which is beneficial for the full mixing of activated carbon and phosphoric acid.

[0041] Please see Figure 2 , Figure 3 and Figure 4 The swing assembly 25 includes a swing arm 251 fixedly installed on the top of the spreading pipe 24, a turntable 252 rotatably installed on the left side of the transfer pipe 22, a sliding groove 253 is provided on the swing arm 251, a sliding rod 254 is rotatably connected to the left edge of the turntable 252, the sliding rod 254 is slidably installed in the sliding groove 253, a bevel gear 255 is coaxially fixedly connected to the right side of the turntable 252, and a bevel gear ring 256 sleeved on the outside of the transfer pipe 22 is fixedly connected to the bottom of the discharge pipe 211, the bevel gear 255 meshes with the bevel gear ring 256.

[0042] In practical use, when the adapter pipe 22 rotates, it drives the bevel gear 255 to rotate around the bevel gear ring 256. The bevel gear ring 256 drives the bevel gear 255 and the turntable 252 to rotate. The turntable 252 drives the slide rod 254 to rotate circumferentially. During the rotation of the turntable 252, the slide rod 254 slides up and down along the slide groove 253. The slide rod 254 pushes the swing arm 251 to swing back and forth, so that the feeding pipe 24 can swing to feed activated carbon.

[0043] Please see Figure 5 , Figure 6 and Figure 7 The elastic component 44 includes a fixed ring 441 fixedly installed on the outer ring wall of the movable rod 42 and located at the top of the slide key 421. The tops of the left and right slide keys 421 are fixedly connected to a moving ring 442 sleeved on the outside of the movable rod 42. A return spring 443 sleeved on the outside of the movable rod 42 is fixedly connected between the fixed ring 441 and the moving ring 442.

[0044] In practical use, when the movable rod 42 moves downward, it drives the fixed ring 441 to move downward as well. Since the movable rod 42 is rotating under the drive of the stirring shaft 31, when the sliding key 421 is not aligned with the keyway 431, the sliding key 421 will be blocked by the inner wall of the guide sleeve 43, preventing the sliding key 421 from moving downward smoothly. At this time, the return spring 443 will be compressed and contracted. When the movable rod 42 drives the sliding key 421 to rotate until it is aligned with the keyway 431, the return force of the return spring 443 pushes the moving ring 442 and the sliding key 421 downward, so that the sliding key 421 is inserted into the keyway 431. At this time, the movable rod 42 drives the guide sleeve 43 to rotate through the sliding key 421, so that the guide sleeve 43 can drive the rotating rod 23 to rotate, thereby driving the rotating pipe 22.

[0045] Please see Figure 2 and Figure 5 The transmission assembly 46 includes a driven gear 461 fixedly mounted on the movable rod 42, and a driving gear 462 fixedly mounted on the stirring shaft 31. The driven gear 461 meshes with the driving gear 462. The thickness of the driven gear 461 is greater than the thickness of the driving gear 462. The bottom end of the telescopic shaft of the electromagnetic push rod 45 is rotatably connected to the top of the movable rod 42. The driven gear 461, the driving gear 462 and the electromagnetic push rod 45 are all located inside the protective cover 41.

[0046] In practical use, when the stirring shaft 31 rotates and stirs, the stirring shaft 31 drives the movable rod 42 to rotate through the transmission of the driving gear 462 and the driven gear 461. Since the thickness of the driven gear 461 is greater than the thickness of the driving gear 462, when the electromagnetic push rod 45 drives the movable rod 42 to move up and down, the driven gear 461 can always maintain a meshing state with the driving gear 462. By setting a protective cover 41 to isolate the driven gear 461, the driving gear 462 and the electromagnetic push rod 45, the corrosion damage to the driven gear 461, the driving gear 462 and the electromagnetic push rod 45 can be reduced.

[0047] Please see Figure 4 and Figure 8 The opening and closing unit 5 includes a baffle 51 rotatably mounted on the feeding pipe 211 for controlling the opening and closing of the feeding pipe 211, a side rod 52 fixedly connected to the rear side of the movable rod 42, a connecting rod 53 rotatably connected to the rear end of the side rod 52, a rotating arm 54 fixedly connected to the rear side of the baffle 51, and the bottom end of the connecting rod 53 rotatably connected to the end of the rotating arm 54 away from the baffle 51.

[0048] In practical use, the baffle 51 is located inside the discharge pipe 211, which can block the discharge pipe 211, prevent the activated carbon in the storage hopper 21 from falling, prevent the hydrogen sulfide produced by the activated carbon adsorption reaction, and ensure that the hydrogen sulfide fully reacts with the arsenic in the phosphoric acid to form a precipitate. When it is time to discharge the activated carbon, the moving rod 42 drives the side rod 52 to move downward. The side rod 52 drives the end of the rotating arm 54 away from the baffle 51 to move downward through the connecting rod 53. The rotating arm 54 drives the baffle 51 to rotate upward, thereby opening the discharge pipe 211 and allowing the activated carbon in the storage hopper 21 to be discharged downward along the discharge pipe 211.

[0049] Please see Figure 1 and Figure 2 A drive motor 32 is fixedly installed on the top of the tank lid 13. The bottom of the output shaft of the drive motor 32 rotates through to the bottom of the tank lid 13 and is connected to the top of the stirring shaft 31 through a coupling.

[0050] In practical use, the stirring shaft 31 is rotated by the drive motor 32, so that the stirring shaft 31 stirs the phosphoric acid, phosphorus pentasulfide and activated carbon to promote the reaction and absorption.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An integrated purification device for phosphoric acid decolorization and impurity removal, characterized in that: It includes a reaction unit (1), which includes a reaction vessel (11) and a lid (13) that is detachably mounted on top of the reaction vessel (11). The feeding unit (2) includes a storage hopper (21) fixedly installed at the bottom of the can lid (13). A discharge pipe (211) is installed at the bottom of the storage hopper (21). A transfer pipe (22) is rotatably installed at the bottom of the discharge pipe (211). A rotating rod (23) for driving the transfer pipe (22) to rotate is rotatably installed on the discharge pipe (211). A sprinkling pipe (24) is rotatably installed on the left side of the transfer pipe (22). A swinging component (25) is also installed on the discharge pipe (211) to drive the sprinkling pipe (24) to swing back and forth as the transfer pipe (22) rotates. The stirring unit (3) includes a stirring shaft (31) rotatably mounted at the bottom of the reaction unit (1). The transmission unit (4) includes a protective cover (41) fixedly installed at the bottom of the can lid (13). A movable rod (42) is slidably installed at the bottom of the protective cover (41). A guide sleeve (43) is fixedly connected to the top of the rotating rod (23). The bottom of the movable rod (42) is movably connected to the top of the guide sleeve (43). A left-right symmetrical sliding key (421) is slidably installed on the outer ring wall of the movable rod (42). A keyway (431) located directly below the sliding key (421) and interlocking with it is opened on the inner wall of the guide sleeve (43). An elastic component (44) for pushing the sliding key (421) to move downward is installed on the movable rod (42). An electromagnetic push rod (45) for driving the movable rod (42) to move up and down is fixedly installed on the can lid (13). A transmission component (46) is connected between the stirring shaft (31) and the movable rod (42). The feed tube (211) is also equipped with an opening and closing unit (5) that controls the opening and closing of the feed tube (211) by moving up and down with the movable rod (42). The connecting pipe (22) is L-shaped, the spreading pipe (24) is rotatably connected to the left end of the horizontal section of the connecting pipe (22), the bottom of the spreading pipe (24) is provided with a spreading port, the bottom end of the rotating rod (23) is Y-shaped and fixedly connected to the inner wall of the connecting pipe (22), and the top end of the rotating rod (23) rotates through to the top of the discharge pipe (211) and is fixedly connected to the guide sleeve (43). The swing assembly (25) includes a swing arm (251) fixedly installed on the top of the feeding pipe (24), a turntable (252) rotatably installed on the left side of the transfer pipe (22), a sliding groove (253) is provided on the swing arm (251), a sliding rod (254) is rotatably connected to the left edge of the turntable (252), the sliding rod (254) is slidably installed in the sliding groove (253), a bevel gear (255) is coaxially fixedly connected to the right side of the turntable (252), and a bevel gear ring (256) sleeved on the outside of the transfer pipe (22) is fixedly connected to the bottom of the feeding pipe (211), the bevel gear (255) meshes with the bevel gear ring (256).

2. The integrated purification equipment for phosphoric acid decolorization and impurity removal according to claim 1, characterized in that: The bottom of the reactor (11) is fixedly equipped with a discharge port (12), and the tank cover (13) is installed on the top of the reactor (11) by bolts. The top of the tank cover (13) is fixedly equipped with a feed inlet (131), a feed inlet (132) and an exhaust port (133). The feed inlet (131) is connected to the top of the storage hopper (21).

3. The integrated purification equipment for phosphoric acid decolorization and impurity removal according to claim 1, characterized in that: The elastic component (44) includes a fixed ring (441) fixedly installed on the outer ring wall of the movable rod (42) and located at the top of the slide key (421). The tops of the left and right slide keys (421) are fixedly connected to a movable ring (442) sleeved on the outside of the movable rod (42). A return spring (443) sleeved on the outside of the movable rod (42) is fixedly connected between the fixed ring (441) and the movable ring (442).

4. The integrated purification equipment for phosphoric acid decolorization and impurity removal according to claim 1, characterized in that: The transmission assembly (46) includes a driven gear (461) fixedly mounted on the movable rod (42), a driving gear (462) fixedly mounted on the stirring shaft (31), the driven gear (461) meshing with the driving gear (462), the bottom end of the telescopic shaft of the electromagnetic push rod (45) being rotatably connected to the top of the movable rod (42), and the driven gear (461), driving gear (462) and electromagnetic push rod (45) all located inside the protective cover (41).

5. The integrated purification equipment for phosphoric acid decolorization and impurity removal according to claim 1, characterized in that: The opening and closing unit (5) includes a baffle (51) rotatably mounted on the feeding pipe (211) for controlling the opening and closing of the feeding pipe (211). A side rod (52) is fixedly connected to the rear side of the movable rod (42). A connecting rod (53) is rotatably connected to the rear end of the side rod (52). A rotating arm (54) is fixedly connected to the rear side of the baffle (51). The bottom end of the connecting rod (53) is rotatably connected to the end of the rotating arm (54) away from the baffle (51).

6. The integrated purification equipment for phosphoric acid decolorization and impurity removal according to claim 4, characterized in that: A drive motor (32) is fixedly installed on the top of the tank cover (13). The bottom of the output shaft of the drive motor (32) rotates through to the bottom of the tank cover (13) and is connected to the top of the stirring shaft (31) via a coupling.

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