Continuous acidification reaction device for preparing calcium superphosphate

Abstract

The utility model relates to the technical field of calcium phosphate preparation, and particularly discloses a continuous acidification reaction device for preparing calcium superphosphate, which is characterized in that a funnel-shaped feeding hopper is arranged at the upper end part of a reaction kettle, a feeding baffle plate is rotatably connected inside the funnel-shaped feeding hopper, a straight gear is sleeved on the outer surface of the feeding baffle plate, and a rotating shaft is rotatably connected at the upper end part of the reaction kettle; the incomplete gear is connected to the outer surface of the rotating shaft in a sleeving mode, the outer surface of the funnel-shaped feeding hopper is connected with a tension spring in a sleeving mode, the rotating shaft rotates to drive the incomplete gear to be meshed with the straight gear so that the feeding baffle can swing clockwise to be opened, and due to the characteristic that teeth of the incomplete gear are discontinuous, the feeding baffle is disengaged after rotating by a certain angle; at the moment, the ground phosphate rock falls into the reaction kettle through the bevel feeding box and the injection valve under the action of gravity to complete feeding, then the tension spring pulls the baffle to reset, the rotating shaft continuously rotates, the process is circulated, the swing frequency of the baffle is adjusted by controlling the speed of the driving motor, and the feeding amount of the ground phosphate rock can be accurately controlled.

Description

Technical Field

[0001] This utility model relates to the field of calcium phosphate preparation technology, and in particular to a continuous acidification reaction apparatus for preparing superphosphate. Background Technology

[0002] Continuous acidification reactors play a crucial role in the production of superphosphate. Superphosphate, an important phosphate fertilizer, is widely used in agricultural production. The continuous acidification reaction in its preparation process aims to ensure the full reaction of phosphate rock powder and phosphoric acid, generating readily absorbable phosphorus for crops. With the ever-increasing demand for phosphate fertilizers in modern agriculture, the efficient and stable production of superphosphate is essential. Continuous acidification reactors, by achieving continuous mixing and reaction of phosphate rock powder and phosphoric acid, can improve production efficiency, ensure product quality stability, and meet the growing market demand for superphosphate. Currently, continuous acidification reactors used for superphosphate production typically require the following technologies in practical applications:

[0003] 1. Precision feeding technology: It can accurately control the feed rate and speed of phosphate rock powder and phosphoric acid, ensuring that the two always enter the reaction zone in the appropriate ratio. This is the key to ensuring the full reaction and improving the yield and quality of superphosphate.

[0004] 2. High-efficiency mixing technology: The reaction device needs to have a high-efficiency stirring or mixing mechanism to mix the phosphate rock powder and phosphoric acid quickly and evenly, increase the contact area between the reactants and accelerate the reaction rate.

[0005] 3. Temperature Control Technology: Acidification reactions are highly sensitive to temperature. A suitable temperature can optimize the reaction process, improve reaction efficiency, and reduce the occurrence of side reactions. Therefore, the equipment needs to be equipped with precise temperature control technology to ensure that the reaction proceeds within a suitable temperature range.

[0006] 4. Corrosion-resistant technology: Since phosphoric acid is corrosive, the materials and internal structure of the reaction device must have good corrosion resistance to ensure the service life and safety of the device and reduce the risk of equipment failure caused by corrosion.

[0007] Currently, various equipment and methods are employed to achieve continuous acidification reactions of superphosphate. Some devices use gravity-fed feeding, utilizing the gravity of phosphate rock powder and phosphoric acid to guide them into the reactor through simple pipes or funnels. This method is simple in structure, but it is difficult to precisely control the feed rate and speed, easily leading to imbalances in the reaction ratio. Other devices use screw conveyors to transport phosphate rock powder, controlling the feed rate by adjusting the screw speed, while simultaneously using pipes to transport phosphoric acid, with flow rate controlled by valves. However, in this method, screw conveyors are prone to clogging, and the accuracy and durability of the phosphoric acid pipe valves are limited, affecting the stability of the feed. Additionally, some more advanced devices use metering pumps to deliver phosphoric acid and electronic scales to measure the phosphate rock powder, but this equipment is costly and requires highly skilled maintenance personnel.

[0008] However, the above method has a prominent problem. The acidification reaction requires a continuous supply of phosphate rock powder, but the demand for phosphate rock powder changes as the reaction progresses. Existing continuous feeding mechanisms often lack continuous and flexible adjustment capabilities, which can easily lead to insufficient phosphate rock powder supply, reduce the reaction rate, fail to fully utilize the capacity of the reaction equipment, and reduce production efficiency. Utility Model Content

[0009] To address the shortcomings of existing technologies, this invention provides a continuous acidification reaction device for preparing superphosphate. It solves the problem that the acidification reaction requires a continuous feeding of phosphate rock powder, but the demand for phosphate rock powder changes as the reaction progresses. Existing continuous feeding mechanisms often lack continuous and flexible adjustment functions, which can easily lead to insufficient phosphate rock powder supply, resulting in a reduced reaction rate, failure to fully utilize the capacity of the reaction equipment, and reduced production efficiency.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A continuous acidification reaction apparatus for preparing superphosphate includes a reactor. A funnel-shaped feeding hopper is located at the upper end of the reactor. A metering mechanism for blocking feeding is located inside the funnel-shaped feeding hopper. The metering mechanism includes a feeding baffle rotatably connected to the inside of the funnel-shaped feeding hopper. A spur gear is sleeved on the outer surface of the feeding baffle. An intermittent mechanism for driving the feeding baffle to swing is located inside the reactor. The intermittent mechanism includes a rotating shaft and an incomplete gear. The rotating shaft is rotatably connected to the upper end of the reactor. The incomplete gear is sleeved on the outer surface of the rotating shaft and meshes with the spur gear. A tension spring is sleeved on the outer surface of the funnel-shaped feeding hopper.

[0012] Preferably, the tension spring is sleeved on the outer surface of the feeding baffle, and a drive motor is fixedly connected to the upper end of the reactor.

[0013] Preferably, the rotating shaft is disposed on the outer surface of the drive motor, and a hopper mounting frame is fixedly connected to the upper end of the reaction vessel.

[0014] Preferably, the funnel-shaped feeding hopper is fixedly connected inside the hopper mounting frame, and the upper end is fixedly connected to an inclined feeding box.

[0015] Preferably, the feeding baffle is located at the upper end of the inclined feeding box, and the liquid inlet hopper is fixedly connected to the outer surface of the reactor.

[0016] Preferably, the inlet hopper is provided with an inclined inlet pipe, and the outer surface of the inlet hopper is threaded with an internally threaded cover.

[0017] Preferably, a cylindrical stop block is fixedly connected inside the internally threaded cover, the cylindrical stop block is sleeved inside the liquid inlet hopper, and a heating box is fixedly connected to the outer surface of the reaction vessel.

[0018] Preferably, a stirring motor is fixedly connected to the lower end of the reactor, and a drain valve is provided inside the reactor.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The rotating shaft drives the incomplete gear, which meshes with the spur gear, causing the feed baffle to swing clockwise and open. Due to the discontinuous teeth of the incomplete gear, the feed baffle disengages after rotating a certain angle. At this time, the phosphate rock powder falls into the reactor through the inclined feed box and the injection valve under the action of gravity to complete the feeding. Afterward, the tension spring pulls the baffle back to its original position, and the rotating shaft continues to rotate. This process is repeated. By controlling the speed of the drive motor to adjust the swing frequency of the baffle, the amount of phosphate rock powder fed can be precisely controlled. The intermittent rotation and continuous swing of the feed baffle realizes the intermittent continuous feeding of phosphate rock powder. This feeding method can better adapt to the rhythm of continuous acidification reaction, ensuring the continuous reaction while avoiding the problem of excessive reaction or unevenness caused by excessive feeding at one time.

[0021] 2. The cylindrical baffle inside the inlet hopper is flush with the inlet of the inclined delivery pipe, which can prevent the phosphoric acid solution from accumulating at the bottom of the inlet hopper when it flows downwards, making it difficult to enter the reactor. If it is necessary to drain and clean the phosphoric acid solution in the inlet hopper, the cylindrical baffle can be easily removed by unscrewing the inner thread cover, and the drain port at the bottom of the inlet hopper can be opened. The operation is very convenient. Attached Figure Description

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is an exploded view of the funnel-shaped feeding hopper connection of this utility model;

[0025] Figure 3 This is a burst diagram of the internal threaded cover connection of this utility model;

[0026] Figure 4 This is an exploded view of the feeding baffle connection of this utility model.

[0027] Legend: 11. Reactor; 12. Funnel-shaped hopper; 13. Feed baffle; 14. Spur gear; 15. Rotating shaft; 16. Incomplete gear; 17. Tension spring; 18. Drive motor; 19. Hopper mounting frame; 21. Inclined feed box; 22. Liquid inlet hopper; 23. Inclined delivery pipe; 24. Internally threaded cover; 25. Cylindrical stop block; 26. Heating box; 27. Stirring motor; 28. Drain valve. Detailed Implementation

[0028] This application provides a continuous acidification reaction apparatus for preparing superphosphate, effectively solving the problem that the acidification reaction requires a continuous supply of phosphate rock powder. However, as the reaction progresses, the demand for phosphate rock powder changes. Existing continuous feeding mechanisms often lack continuous and flexible adjustment capabilities, easily leading to insufficient phosphate rock powder supply, which reduces the reaction rate, fails to fully utilize the capacity of the reaction equipment, and lowers production efficiency. The rotating shaft drives an incomplete gear, which meshes with a spur gear, causing the feed baffle to swing clockwise and open. Due to the discontinuous teeth of the incomplete gear, the feed... After the baffle rotates to a certain angle, it disengages. At this time, the phosphate rock powder falls into the reactor through the inclined feed box and the injection valve under the action of gravity to complete the feeding. Afterwards, the tension spring pulls the baffle back to its original position, and the rotating shaft continues to rotate. This process is repeated. By controlling the speed of the drive motor to adjust the swing frequency of the baffle, the amount of phosphate rock powder fed can be precisely controlled. The intermittent rotation and continuous swing of the feed baffle realizes the intermittent continuous feeding of phosphate rock powder. This feeding method can better adapt to the rhythm of continuous acidification reaction. While ensuring the continuous reaction, it avoids the problem of excessive reaction or unevenness caused by excessive feeding at one time.

[0029] Example

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the technical solution in this application embodiment effectively solves the problem that the acidification reaction requires continuous feeding of phosphate rock powder. However, as the reaction progresses, the demand for phosphate rock powder also changes. Existing continuous feeding mechanisms often lack continuous and flexible adjustment functions, which easily leads to insufficient phosphate rock powder supply, reducing the reaction rate, failing to fully utilize the capacity of the reaction equipment, and reducing production efficiency. The overall idea is as follows: A continuous acidification reaction device for preparing superphosphate includes a reaction vessel 11, with a funnel-shaped [feature] at the upper end of the reaction vessel 11. The funnel-shaped feeding hopper 12 has a metering mechanism inside for blocking the feeding. The metering mechanism includes a feeding baffle 13, which is rotatably connected inside the funnel-shaped feeding hopper 12. A spur gear 14 is sleeved on the outer surface of the feeding baffle 13. The reactor 11 has an intermittent mechanism inside for driving the feeding baffle 13 to swing. The intermittent mechanism includes a rotating shaft 15 and a partially driven gear 16. The rotating shaft 15 is rotatably connected to the upper end of the reactor 11, and the partially driven gear 16 is sleeved on the outer surface of the rotating shaft 15. The partially driven gear 16 meshes with the spur gear 14. A tension spring 17 is sleeved on the outer surface of the feeding hopper 12, and the tension spring 17 is sleeved on the outer surface of the feeding baffle 13. A drive motor 18 is fixedly connected to the upper end of the reactor 11, and a rotating shaft 15 is set on the outer surface of the drive motor 18. The drive motor 18 serves as the drive source, and its output shaft will drive the rotating shaft 15 to rotate. When the rotating shaft 15 rotates, two incomplete gears 16 mounted on its surface will mesh with spur gears 14, thereby driving the feeding baffle 13 to rotate. The feeding baffle 13 rotates clockwise and swings to open. Due to the characteristic that the teeth of the incomplete gears 16 do not cover the entire circle, the feeding baffle 13 will be driven to rotate. After being rotated to a certain angle and opened, it enters a non-meshing state. During the rotation and opening cycle, the phosphate rock powder contained in the funnel-shaped feeding hopper 12 falls downwards for feeding. When the incomplete gear 16 rotates to a position where it is not meshed with the incomplete gear 16, the feeding baffle 13 loses its pushing effect and is pulled and rotated to reset under the force of the tension spring 17. When the rotating shaft 15 continues to rotate, the above operation will be repeated to achieve intermittent rotation and continuous oscillation. The frequency of oscillation of the feeding baffle 13 can be controlled by controlling the rotation speed of the output shaft of the drive motor 18, thereby controlling the feeding amount.

[0031] A hopper mounting frame 19 is fixedly connected to the upper end of the reactor 11. A funnel-shaped feeding hopper 12 is fixedly connected inside the hopper mounting frame 19. An inclined feed box 21 is fixedly connected to the upper end of the reactor 11. A feeding baffle 13 is located at the upper end of the inclined feed box 21. A liquid inlet hopper 22 is fixedly connected to the outer surface of the reactor 11. An inclined liquid delivery pipe 23 is installed inside the liquid inlet hopper 22. An internally threaded cover 24 is threadedly connected to the outer surface of the liquid inlet hopper 22. A cylindrical stop block 25 is fixedly connected inside the internally threaded cover 24. The cylindrical stop block 25 is fitted inside the liquid inlet hopper 22. The material falling from the funnel-shaped feeding hopper 12 will fall down the inclined inner wall of the inclined feed box 21 into the reactor. Mixing and stirring operations are carried out inside the reactor 11. The inclined feed box 21 allows the material to fall into the reactor 11 through three injection valves. The inlet hopper 22 installed on one side of the reactor 11 is used for feeding the phosphoric acid solution. The phosphoric acid solution will fall into the reactor 11 along the inclined delivery pipe 23 inside the inlet hopper 22. The cylindrical baffle 25 fitted inside the inlet hopper 22 is flush with the inlet of the inclined delivery pipe 23 to prevent the phosphoric acid solution from flowing downward and accumulating, making it difficult to enter the reactor 11. The cylindrical baffle 25 can be removed by unscrewing the internal threaded cover 24 to open the drain port at the lower end of the inlet hopper 22, making it very convenient to discharge the phosphoric acid solution in the inlet hopper 22.

[0032] A heating box 26 is fixedly connected to the outer surface of the reactor 11, and a stirring motor 27 is fixedly connected to the lower end of the reactor 11. A drain valve 28 is installed inside the reactor 11. The heating box 26 installed at the lower end of the reactor 11 is used to drive the stirring rod to rotate and carry out the stirring and mixing work of the acidification reaction. The stirring motor 27 is used to process the solution through the electric heating wire to ensure that the acidification reaction is carried out at a suitable temperature. The drain valve 28 is used to discharge the material after the acidification reaction is completed for use.

[0033] To address the problems existing in the prior art, this utility model provides a continuous acidification reaction device for preparing superphosphate. The rotating shaft 15 drives the incomplete gear 16, which meshes with the spur gear 14, causing the feed baffle 13 to swing clockwise and open. Due to the discontinuous teeth of the incomplete gear 16, the feed baffle 13 disengages after rotating a certain angle. At this time, the phosphate rock powder falls into the reaction vessel 11 under the action of gravity through the inclined feed box 21 and the injection valve to complete the feeding. Afterwards, the tension spring 17 pulls the baffle back to its original position, and the rotating shaft 15 continues to rotate. This process is repeated. By controlling the speed of the drive motor 18 to adjust the swing frequency of the baffle 13, the amount of phosphate rock powder fed can be precisely controlled. The intermittent rotation and continuous swing of the feed baffle 13 realizes the intermittent continuous feeding of phosphate rock powder. This feeding method can better adapt to the rhythm of the continuous acidification reaction, ensuring the continuous reaction while avoiding the problem of excessive reaction or unevenness caused by excessive feeding at one time.

[0034] Reactor 11: As the core container for the entire preparation of superphosphate, it provides space for the acidification reaction of phosphate rock powder and phosphoric acid solution;

[0035] Funnel-shaped feeding hopper 12: Used to store phosphate rock powder, and with its own funnel shape, the phosphate rock powder tends to fall under the action of gravity. Combined with the metering mechanism and the intermittent mechanism, the feeding of phosphate rock powder can be controlled.

[0036] Feeding baffle 13: When connected to spur gear 14 and driven by incomplete gear 16, it can rotate clockwise to open, allowing phosphate rock powder to fall within the opening cycle. After the incomplete gear 16 disengages, it is reset by the action of tension spring 17, blocking the phosphate rock powder from falling, thereby realizing intermittent feeding and precisely controlling the rhythm and amount of phosphate rock powder entering the reactor 11.

[0037] Spur gear 14: transmits the rotation of the incomplete gear 16 to the feeding baffle 13, so that the feeding baffle 13 can swing with the rotation of the incomplete gear 16, thereby controlling the feeding action of phosphate rock powder. It is the key transmission component for realizing the movement of the feeding baffle 13.

[0038] Rotating shaft 15: Rotates under the drive of drive motor 18, providing rotational power to incomplete gear 16, and then drives the loading baffle 13 to swing through the meshing of incomplete gear 16 and spur gear 14. It is the key connecting component of the entire intermittent loading drive system.

[0039] Incomplete gear 16: Because its teeth are not all around the circumference, when it meshes with spur gear 14, it can drive the feeding baffle 13 to rotate a certain angle and then enter a non-meshing state, thereby realizing the intermittent oscillation of the feeding baffle 13 and accurately controlling the feeding cycle of phosphate rock powder. It is the core component for realizing intermittent feeding.

[0040] Tension spring 17: When the incomplete gear 16 disengages from the spur gear 14 and the feeding baffle 13 loses its pushing force, the tension force of the tension spring 17 causes the feeding baffle 13 to rotate and reset, providing reset power for the reciprocating motion of the feeding baffle 13 and ensuring the cyclical progress of the feeding process.

[0041] Drive motor 18: As the power source of the entire feeding control section, its output shaft drives the rotating shaft 15 to rotate. By controlling the rotation speed of the output shaft of drive motor 18, the rotation speed of rotating shaft 15 can be adjusted, thereby controlling the meshing frequency of incomplete gear 16 and spur gear 14, and finally realizing the control of the swing frequency of feeding baffle 13, and accurately adjusting the feeding amount of phosphate rock powder.

[0042] Hopper mounting frame 19: Ensures that the funnel-shaped feeding hopper 12 is in a stable position during the reaction process, so that the phosphate rock powder can accurately and stably enter the reactor 11 through the inclined feed box 21, providing a stable support structure for the feeding system;

[0043] Inclined feed box 21: Its inclined inner wall guides the phosphate rock powder falling from the funnel-shaped feed hopper 12, and it falls evenly into the reactor 11 through three feed valves. The opening and closing of the feed valves can determine the opening and closing of the feed port, so that the phosphate rock powder can enter the reaction area more orderly and evenly, which helps to improve the uniformity and efficiency of the reaction.

[0044] Inlet hopper 22: Used for feeding phosphoric acid solution; an inclined delivery pipe 23 is installed inside to guide the phosphoric acid solution into the reactor 11. The outer surface is threaded to the inner threaded cover 24, which, together with the cylindrical stop block 25, can control the feeding state of the phosphoric acid solution and facilitate cleaning and maintenance of the inlet hopper 22.

[0045] Inclined inlet pipe 23: Allows the phosphoric acid solution to flow into the reaction vessel 11 along the inclined direction under the action of gravity, ensuring that the phosphoric acid solution can smoothly and stably enter the reaction zone and mix with the phosphate rock powder.

[0046] Internal threaded cover 24: By screwing the internal threaded cover 24, the cylindrical stop 25 can be easily removed or installed, thereby opening or closing the drain port at the lower end of the inlet hopper 22, which facilitates the drainage and cleaning of the phosphoric acid solution in the inlet hopper 22 and other maintenance work.

[0047] Cylindrical baffle 25: It is flush with the feed inlet of the inclined delivery pipe 23, which can prevent the phosphoric acid solution from accumulating at the bottom of the feed hopper 22 and ensure that the phosphoric acid solution can smoothly enter the reactor 11 through the inclined delivery pipe 23. At the same time, when it is necessary to clean the feed hopper 22, it can be removed together with the internal threaded cover 24 to open the drain port.

[0048] Heating box 26: It is equipped with an electric heating wire inside, which heats the solution to ensure that the acidification reaction is carried out under suitable temperature conditions, optimizes the reaction process, improves reaction efficiency, avoids side reactions, and improves the quality of superphosphate production;

[0049] Stirring motor 27: By driving the stirring rod to rotate, it stirs and mixes the phosphate rock powder and phosphoric acid solution in the reaction vessel 11, increases the probability of collision between reactant molecules, accelerates the chemical reaction, promotes the components in the phosphate rock powder to react with phosphoric acid more quickly and completely to generate superphosphate, improves reaction efficiency, and ensures that the continuous acidification reaction is carried out efficiently in the homogeneous system.

[0050] Drain valve 28: After the acidification reaction is completed, the material that has completed the reaction in the reactor 11 is discharged by operating the drain valve 28 so that it can be processed, stored or used in subsequent processes. It is a control component for the discharge of reaction products.

[0051] Working principle:

[0052] In the first step, the phosphate rock powder contained in the funnel-shaped feed hopper 12 falls downwards under gravity, passing through the inclined inner wall of the inclined feed box 21 and flowing into the reactor 11 along the three injection valves. The inlet hopper 22 installed on one side of the reactor 11 is used for feeding the phosphoric acid solution. The phosphoric acid solution falls into the reactor 11 under gravity along the inclined delivery pipe 23 inside the inlet hopper 22. The cylindrical baffle 25 fitted inside the inlet hopper 22 is flush with the inlet of the inclined delivery pipe 23, preventing the phosphoric acid solution from accumulating at the bottom of the inlet hopper 22 and making it difficult to enter the reactor 11. If it is necessary to drain or clean the phosphoric acid solution in the inlet hopper 22, the cylindrical baffle 25 can be easily removed by unscrewing the internal threaded cover 24, opening the drain port at the lower end of the inlet hopper 22. The operation is very convenient. After the phosphate rock powder and phosphoric acid solution enter the reactor 11, the stirring motor 27 drives the stirring rod to rotate, stirring and mixing the materials in the reactor 11. This ensures that the phosphate rock powder and phosphoric acid solution are fully mixed and in contact. The stirring action increases the probability of collisions between reactant molecules, accelerating the chemical reaction and promoting a faster and more complete reaction between the components in the phosphate rock powder and phosphoric acid to generate superphosphate. This improves reaction efficiency and ensures that the continuous acidification reaction proceeds efficiently in a homogeneous system. The heating box 26 installed at the lower end of the reactor 11 heats the solution through internal electric heating wires to ensure that the acidification reaction is carried out under suitable temperature conditions, thereby improving reaction efficiency and the quality of superphosphate formation. After the acidification reaction is completed, the material that has completed the reaction in the reactor 11 is discharged by operating the drain valve 28 for subsequent use.

[0053] In the second step, the drive motor 18 serves as the power source for the entire feeding control section. Its output shaft drives the rotating shaft 15 to rotate. When the rotating shaft 15 rotates, the incomplete gear 16 sleeved on its surface rotates accordingly. Since the incomplete gear 16 meshes with the spur gear 14 sleeved on the outer surface of the feeding baffle 13, the rotation of the incomplete gear 16 will drive the spur gear 14, thereby causing the feeding baffle 13 to rotate and swing clockwise to open. Because the teeth of the incomplete gear 16 are not all around the circumference, after the feeding baffle 13 rotates to a certain angle and opens, it will enter a non-meshing state. During the rotation and opening cycle, the phosphate rock powder contained in the funnel-shaped feeding hopper 12 is subjected to gravity. Under the action of the force, it falls downwards, passes through the inclined inner wall of the inclined feed box 21, and falls into the reactor 11 along the three injection valves to complete the feeding operation. When the incomplete gear 16 rotates to the position where it does not mesh with the spur gear 14, the feed baffle 13 loses the force of being pushed. At this time, the tension spring 17 plays a role in pulling the feed baffle 13 to rotate and reset. As the rotating shaft 15 continues to rotate, the above operation is repeated continuously, realizing the intermittent rotation and continuous oscillation of the feed baffle 13. By controlling the rotation speed of the output shaft of the drive motor 18, the oscillation frequency of the feed baffle 13 can be controlled, thereby accurately controlling the feed amount of phosphate rock powder.

[0054] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A continuous acidification reaction apparatus for preparing superphosphate, comprising a reaction vessel (11), wherein a funnel-shaped feeding hopper (12) is provided at the upper end of the reaction vessel (11), characterized in that, The funnel-shaped feeding hopper (12) is provided with a metering mechanism for blocking the feeding. The metering mechanism includes a feeding baffle (13), which is rotatably connected to the inside of the funnel-shaped feeding hopper (12). A spur gear (14) is sleeved on the outer surface of the feeding baffle (13). The reactor (11) is provided with an intermittent mechanism for driving the feeding baffle (13) to swing. The intermittent mechanism includes a rotating shaft (15) and an incomplete gear (16). The rotating shaft (15) is rotatably connected to the upper end of the reactor (11). The incomplete gear (16) is sleeved on the outer surface of the rotating shaft (15). The incomplete gear (16) and the spur gear (14) mesh with each other. The funnel-shaped feeding hopper (12) is fitted with a tension spring (17) on its outer surface.

2. The continuous acidification reaction apparatus for preparing superphosphate as described in claim 1, characterized in that, The tension spring (17) is sleeved on the outer surface of the feeding baffle (13); The upper end of the reactor (11) is fixedly connected to a drive motor (18).

3. The continuous acidification reaction apparatus for preparing superphosphate as described in claim 2, characterized in that, The rotating shaft (15) is disposed on the outer surface of the drive motor (18); The upper end of the reactor (11) is fixedly connected to a hopper mounting frame (19).

4. The continuous acidification reaction apparatus for preparing superphosphate as described in claim 3, characterized in that, The funnel-shaped feed hopper (12) is fixedly connected inside the hopper mounting frame (19); The upper end is fixedly connected to an inclined feed box (21).

5. A continuous acidification reaction apparatus for preparing superphosphate as described in claim 4, characterized in that, The feeding baffle (13) is located at the upper end of the inclined feeding box (21); The outer surface of the reactor (11) is fixedly connected to a liquid inlet hopper (22).

6. The continuous acidification reaction apparatus for preparing superphosphate as described in claim 5, characterized in that, An inclined infusion pipe (23) is provided inside the inlet hopper (22); The outer surface of the liquid inlet hopper (22) is threaded with an internal threaded cover (24).

7. A continuous acidification reaction apparatus for preparing superphosphate as described in claim 6, characterized in that, The internal threaded cover (24) is fixedly connected to a cylindrical stop block (25), which is sleeved inside the liquid inlet hopper (22); A heating box (26) is fixedly connected to the outer surface of the reactor (11).

8. The continuous acidification reaction apparatus for preparing superphosphate as described in claim 7, characterized in that, A stirring motor (27) is fixedly connected to the lower end of the reactor (11); The reactor (11) is equipped with a drain valve (28).

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