Stirring reaction device for iron phosphate production

Abstract

The utility model relates to a stirring reaction device for iron phosphate production, which comprises a reaction kettle, a mounting frame is mounted in the reaction kettle through a sliding mechanism, the sliding mechanism enables the mounting frame to slide along the vertical direction, and a filter screen is arranged in the mounting frame; a conveying pump is mounted on the outer surface of the reaction kettle and above the filter screen, and the input end of the conveying pump is communicated with the interior of the reaction kettle; the output end of the conveying pump is connected with a U-shaped pipe, the end part of the U-shaped pipe is communicated with the interior of the reaction kettle, and the joint of the U-shaped pipe and the reaction kettle is positioned below the filter screen; a telescopic stirring mechanism is arranged in the reaction kettle and can adapt to the up-down sliding of the mounting frame. The mixed solution of the ferric salt and the phosphate is conveyed to the position below the filter screen through the conveying pump and the U-shaped pipe, ferric phosphate generated by reaction is filtered by the filter screen and is intercepted below the filter screen, and therefore the influence of the ferric phosphate on the reaction of the mixed solution of the ferric salt and the phosphate can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of ferric phosphate production technology, specifically to a stirring reaction device for ferric phosphate production. Background Technology

[0002] Iron phosphate, as an important inorganic compound, has wide applications in lithium-ion battery cathode materials and catalysts. With the booming development of new energy vehicles and energy storage industries, the market demand for iron phosphate has increased dramatically, while also placing higher demands on its quality and production efficiency. Currently, iron phosphate is mainly prepared by precipitation reaction of iron salts and phosphates.

[0003] Chinese patent CN222325175U discloses an iron solution reaction device for the production of iron phosphate. This device uses a filter screen to block and filter the iron phosphate that has settled to the bottom of the reaction vessel, making it less likely for the iron phosphate to float upwards and affect the reaction between the iron salt and the phosphate solution, thereby further increasing the reaction rate between the iron salt and the phosphate solution.

[0004] However, during the stirring process, the ferric phosphate produced by the reaction is evenly distributed in the reaction vessel due to centrifugal force, and it is also carried upward by the iron salt and phosphate solution, making it difficult for the ferric phosphate to sink to the bottom of the filter screen. This still affects the reaction of the iron salt and phosphate solution, resulting in poor performance. Utility Model Content

[0005] The purpose of this invention is to provide a stirring reaction device for the production of ferric phosphate, which effectively solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A stirred reaction apparatus for producing ferric phosphate includes a reaction vessel. Inside the reaction vessel, a mounting frame is installed via a sliding mechanism, allowing the mounting frame to slide vertically. A filter screen is installed inside the mounting frame. A delivery pump is mounted on the outer surface of the reaction vessel, above the filter screen, with its input end connected to the interior of the reaction vessel. The output end of the delivery pump is connected to a U-shaped pipe, the end of which is connected to the interior of the reaction vessel, and the connection point between the U-shaped pipe and the reaction vessel is located below the filter screen. A telescopic stirring mechanism is installed inside the reaction vessel, capable of accommodating the vertical sliding of the mounting frame.

[0008] Therefore, by using a pump to deliver the mixed solution of iron salt and phosphate through a U-shaped tube to the area below the filter screen, the ferric phosphate generated in the reaction is intercepted below the filter screen, thereby reducing the influence of ferric phosphate on the reaction of the mixed solution of iron salt and phosphate. With the setting of sliding mechanism and telescopic stirring mechanism, as the amount of ferric phosphate below the filter screen gradually increases, the pressure generated can push the mounting frame upward and slide along the slide bar, thus adapting to the formation process of ferric phosphate and avoiding excessive pressure.

[0009] Furthermore, the sliding mechanism includes multiple through holes formed on the surface of the mounting frame, with a slide rod inserted inside the through holes. Fixing blocks are installed at both the upper and lower ends of the slide rod, and the ends of the fixing blocks are connected to the inner wall of the reactor.

[0010] Furthermore, the telescopic stirring mechanism includes a stirring motor mounted on the top of the reactor via a fixed frame. The end of the output shaft of the stirring motor is connected to multiple telescopic shafts, and each telescopic shaft is slidably connected to the telescopic shaft above it. The ends of the multiple telescopic shafts are rotatably connected to the mounting frame, and stirring blades are installed on the outer surface of each telescopic shaft.

[0011] Furthermore, a one-way valve is installed on the outer surface of the U-shaped tube.

[0012] Furthermore, iron salt solution injection pipes and phosphate solution injection pipes are respectively connected to the two sides of the top of the reactor, and a discharge pipe is installed at the bottom of the reactor, with a valve inside the discharge pipe.

[0013] Furthermore, a converging hopper is installed on the top of the reactor, and the bottoms of the iron salt solution injection pipe and the phosphate solution injection pipe are both located inside the converging hopper. The converging hopper is positioned outside the multi-section telescopic shaft, and a gap is left between the converging hopper and the multi-section telescopic shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. A pump delivers a mixed solution of iron salts and phosphates through a U-shaped tube to the bottom of a filter screen. The iron phosphate produced in the reaction is filtered and trapped below the screen, while the iron salt and phosphate mixture can pass through the screen to the top to participate in the chemical reaction again. This reduces the impact of iron phosphate on the reaction of the iron salt and phosphate mixture. Furthermore, the pump promotes mixing between the upper and lower layers of solution, thereby improving the uniformity and efficiency of mixing, achieving two benefits in one step.

[0016] 2. By using a sliding mechanism and a telescopic stirring mechanism, as the amount of ferric phosphate below the filter screen gradually increases, the pressure generated can lift the mounting frame upwards and allow it to slide along the sliding rod. This adapts to the ferric phosphate generation process, preventing excessive pressure. Furthermore, when the mounting frame rises, it can cause the multi-section telescopic shaft to retract, preventing interference between the filter screen and the telescopic stirring mechanism. When the multi-section telescopic shaft retracts, it can reduce the distance between the stirring blades in height, forming a denser stirring area. This further enhances the mixing efficiency of the iron salt and phosphate solution and improves the reaction efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the reaction vessel in this utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the multi-section telescopic shaft in this utility model;

[0020] Figure 4 for Figure 3 An enlarged diagram of A in the diagram.

[0021] In the diagram: 1. Reactor; 2. Mounting frame; 3. Filter screen; 4. Transfer pump; 5. U-shaped pipe; 501. Check valve; 6. Sliding mechanism; 601. Through hole; 602. Slide rod; 603. Fixing block; 7. Telescopic stirring mechanism; 701. Fixing frame; 702. Stirring motor; 703. Multi-section telescopic shaft; 704. Stirring blades; 8. Iron salt solution injection pipe; 9. Phosphate solution injection pipe; 10. Feed pipe; 11. Valve; 12. Converging hopper. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0024] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0025] Please see Figure 1-4 This invention provides a stirred reaction apparatus for producing ferric phosphate, comprising a reaction vessel 1. A mounting frame 2 is installed inside the reaction vessel 1 via a sliding mechanism 6, allowing the mounting frame 2 to slide vertically. A filter screen 3 is installed inside the mounting frame 2, intercepting ferric phosphate while allowing the iron salt and phosphate solution, as well as the final reaction solution containing soluble salts, to pass through. A delivery pump 4 is installed on the outer surface of the reaction vessel 1, above the filter screen 3, with its input end connected to the interior of the reaction vessel 1. A U-shaped pipe 5 is connected to the output end of the delivery pump 4, with its end connected to the interior of the reaction vessel 1. The connection between the U-shaped pipe 5 and the reaction vessel 1 is located below the filter screen 3. The delivery pump 4 delivers the mixed solution of iron salt and phosphate through the U-shaped pipe 5 to the area below the filter screen 3, thus intercepting the generated ferric phosphate below the filter screen 3 and reducing the impact of ferric phosphate on the reaction of the iron salt and phosphate solution.

[0026] Reactor 1 adopts a cylindrical design with an inner diameter of 1500mm, a height of 2500mm, and a wall thickness of 8mm. It is made of 304 stainless steel, which has good corrosion resistance and mechanical strength, can adapt to the chemical environment in the production process of ferric phosphate, and ensures long-term stable operation.

[0027] Filter 3 is made of stainless steel woven mesh with a mesh size of about 0.074mm. It can effectively intercept the generated iron phosphate precipitate, while ensuring that iron salt and phosphate solutions, as well as solutions containing soluble salts after the reaction, can pass through smoothly.

[0028] The transfer pump 4 is model IH65-50-160, and its flow rate range is 15-30 m³ / h. 3 / h, which can meet the solution delivery needs of different scales of production.

[0029] The reactor 1 is equipped with a telescopic stirring mechanism 7, which can adapt to the up-and-down sliding of the mounting frame 2. As the amount of ferric phosphate below the filter screen 3 gradually increases, the resulting pressure can push the mounting frame 2 upwards and slide it along the slide rod 602, thus adapting to the ferric phosphate generation process and avoiding excessive pressure. A one-way valve 501 is installed on the outer surface of the U-shaped tube 5. Since the reaction between iron salt and phosphate requires a certain process and ferric phosphate is generated slowly, the transfer pump 4 can be started intermittently to achieve the desired effect, reducing energy consumption. By setting the one-way valve 501, when the transfer pump 4 is turned off, backflow of the solution below the filter screen 3 can be prevented, ensuring that the ferric phosphate is always below the filter screen 3.

[0030] Please see Figure 2 The sliding mechanism 6 includes multiple through holes 601 formed on the surface of the mounting frame 2. A sliding rod 602 is inserted into the through hole 601. Fixing blocks 603 are installed at both the upper and lower ends of the sliding rod 602. The ends of the fixing blocks 603 are connected to the inner wall of the reactor 1. When the amount of ferric phosphate intercepted below the filter screen 3 gradually increases, the pressure generated will push the mounting frame 2 upward because it cannot pass through the filter screen 3. Due to the limiting effect of the sliding rod 602, the mounting frame 2 can slide upward smoothly and vertically to adapt to the ferric phosphate generation process and avoid excessive pressure.

[0031] The slide bar 602 is made of stainless steel and has a polished surface with a roughness Ra≤0.8μm, ensuring that the mounting frame 2 slides smoothly without obstruction.

[0032] Please see Figure 2 , Figure 3 and Figure 4The telescopic stirring mechanism 7 includes a stirring motor 702 mounted on the top of the reactor 1 via a fixing frame 701. The output shaft of the stirring motor 702 is connected to a multi-section telescopic shaft 703, and each section of the telescopic shaft 703 is slidably connected to the section above it. The ends of the multi-section telescopic shaft 703 are rotatably connected to the mounting frame 2. Each section of the telescopic shaft 703 has stirring blades 704 mounted on its outer surface. When the stirring motor 702 is started, it drives the multi-section telescopic shaft 703 to rotate. Because each section of the telescopic shaft... All sections are slidably connected to the upper section of the telescopic shaft, thus enabling the entire multi-section telescopic shaft 703 to rotate and drive the stirring blades 704 to stir and mix the solution. When the mounting frame 2 slides upward, the multi-section telescopic shaft 703 adaptively retracts, preventing interference between the filter screen 3 and the telescopic stirring mechanism 7. Furthermore, when the multi-section telescopic shaft 703 retracts, the height of the spacing between the stirring blades 704 is reduced, forming a denser stirring area, which further enhances the mixing efficiency of the iron salt and phosphate solution and improves the reaction efficiency.

[0033] The stirring motor 702, model Y132S-4, has a rated power of 5.5kW and a rated speed of 1440r / min, providing stable power for stirring.

[0034] Please see Figure 1 and Figure 2 The top of the reactor 1 is connected to two sides by an iron salt solution injection pipe 8 and a phosphate solution injection pipe 9, respectively. A discharge pipe 10 is installed at the bottom of the reactor 1, and a valve 11 is installed inside the discharge pipe 10. Iron salt and phosphate are injected into the reactor 1 through the iron salt solution injection pipe 8 and the phosphate solution injection pipe 9, respectively. After the reaction is complete, the valve 11 can be opened to discharge the iron phosphate solution from the discharge pipe 10. Since the iron phosphate solution contains iron phosphate and a solution containing soluble salts, it can backwash the filter screen 3 as it passes through, preventing iron phosphate residue from remaining on the lower surface of the filter screen 3. A collection hopper 12 is installed at the top of the reactor 1, and the bottoms of the iron salt solution injection pipe 8 and the phosphate solution injection pipe 9 are located inside the collection hopper 12. The converging hopper 12 is located on the outside of the multi-section telescopic shaft 703, and there is a gap between the converging hopper 12 and the multi-section telescopic shaft 703. Iron salt and phosphate are injected into the reactor 1 through the iron salt solution injection pipe 8 and the phosphate solution injection pipe 9, respectively, and fall onto the converging hopper 12. They then flow down from the gap between the converging hopper 12 and the multi-section telescopic shaft 703. Since the converging hopper 12 initially fuses and converges them, it can achieve the purpose of premixing and further improve the mixing efficiency.

[0035] The specific workflow and working principle of this device are as follows.

[0036] Iron salt and phosphate solutions are injected into the reactor 1 through iron salt solution injection pipe 8 and phosphate solution injection pipe 9, respectively, and fall onto the collecting hopper 12. They then flow down through the gap between the collecting hopper 12 and the multi-section telescopic shaft 703, which serves as a premixing process. Next, the stirring motor 702 is started to drive the multi-section telescopic shaft 703 to rotate, which in turn drives the stirring blades 704 to stir and mix the solutions. The iron salt and phosphate solutions react to produce ferric phosphate. The transfer pump 4 is started to transport the iron salt and phosphate mixed solution through the U-shaped pipe 5 to the bottom of the filter screen 3. The ferric phosphate produced in the reaction is filtered by the filter screen 3 and is intercepted below the filter screen 3, while the iron salt and phosphate mixed solution can pass through the filter screen 3 and enter the upper part to participate in the chemical reaction again. This reduces the influence of ferric phosphate on the reaction of the iron salt and phosphate mixed solution. Furthermore, the transfer pump 4 can also promote the mixing between the upper and lower layers of solution, thereby improving the uniformity and efficiency of the mixing between the solutions, achieving two benefits at once.

[0037] As the amount of ferric phosphate below the filter screen 3 gradually increases, the pressure generated can lift the mounting frame 2 upwards and allow it to slide along the slide bar 602. This allows it to adapt to the ferric phosphate generation process and avoid excessive pressure. When the mounting frame 2 rises, it can cause the multi-section telescopic shaft 703 to retract, preventing interference between the filter screen 3 and the telescopic stirring mechanism 7. Furthermore, when the multi-section telescopic shaft 703 retracts, it can reduce the height of the spacing between the stirring blades 704, forming a denser stirring area. This further enhances the mixing efficiency of the iron salt and phosphate solution and improves the reaction efficiency.

[0038] 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 stirred reaction apparatus for producing ferric phosphate, comprising a reaction vessel (1), characterized in that: The reactor (1) is equipped with a mounting frame (2) inside by a sliding mechanism (6). The sliding mechanism (6) enables the mounting frame (2) to slide in the vertical direction. A filter screen (3) is provided inside the mounting frame (2). A delivery pump (4) is installed on the outer surface of the reactor (1) and above the filter screen (3), and the input end of the delivery pump (4) is connected to the interior of the reactor (1); The output end of the delivery pump (4) is connected to a U-shaped tube (5), the end of the U-shaped tube (5) is connected to the interior of the reactor (1), and the connection between the U-shaped tube (5) and the reactor (1) is located below the filter screen (3); The reactor (1) is equipped with a telescopic stirring mechanism (7) inside, which can adapt to the up and down sliding of the mounting frame (2).

2. The stirred reaction apparatus for producing ferric phosphate according to claim 1, characterized in that: The sliding mechanism (6) includes a plurality of through holes (601) formed on the surface of the mounting frame (2). A slide rod (602) is inserted inside the through hole (601). A fixing block (603) is installed at both the upper and lower ends of the slide rod (602). The end of the fixing block (603) is connected to the inner wall of the reactor (1).

3. The stirred reaction apparatus for producing ferric phosphate according to claim 1, characterized in that: The telescopic stirring mechanism (7) includes a stirring motor (702) mounted on the top of the reactor (1) via a fixing frame (701). The end of the output shaft of the stirring motor (702) is connected to a multi-section telescopic shaft (703), and each section of the multi-section telescopic shaft (703) is slidably connected to the section above it. The end of the multi-section telescopic shaft (703) is rotatably connected to the mounting frame (2). Each section of the multi-section telescopic shaft (703) is equipped with stirring blades (704) on its outer surface.

4. The stirred reaction apparatus for producing ferric phosphate according to claim 1, characterized in that: A one-way valve (501) is installed on the outer surface of the U-shaped tube (5).

5. The stirred reaction apparatus for producing ferric phosphate according to claim 3, characterized in that: The top of the reactor (1) is connected to an iron salt solution injection pipe (8) and a phosphate solution injection pipe (9) respectively. The bottom of the reactor (1) is equipped with a discharge pipe (10) and a valve (11) is installed inside the discharge pipe (10).

6. The stirred reaction apparatus for producing ferric phosphate according to claim 5, characterized in that: A collection hopper (12) is installed on the top of the reactor (1), and the bottoms of the iron salt solution injection pipe (8) and the phosphate solution injection pipe (9) are both located inside the collection hopper (12). The converging hopper (12) is located on the outside of the multi-section telescopic shaft (703), and a gap is left between the converging hopper (12) and the multi-section telescopic shaft (703).

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