Anti-crystallization reaction device in iron phosphate production process

Abstract

The application relates to the technical field of iron phosphate production, and particularly discloses a crystallization-preventing reaction device in an iron phosphate production process, which comprises a reactor body, the reactor body is in a cylindrical shape as a whole, a smooth material is arranged on the inner wall of the reactor, a mixed liquid guide pipe is arranged at the middle of the side wall of the reactor body, the mixed liquid guide pipe is arranged in the tangential direction of the inner wall of the section along the horizontal direction of the reactor body, an oxidant guide pipe is arranged above the reactor, the oxidant guide pipe extends into the reactor body in the vertical direction and extends below the mixed liquid guide pipe, a sprayer is arranged at the end of the oxidant guide pipe in the reactor, the smooth material is arranged on the inner wall of the reactor body to improve the smoothness of the inner wall, the mixed liquid guide pipe is arranged to make the mixed liquid do cyclone motion in the reactor body, the sprayer is arranged at the end of the oxidant guide pipe to atomize the oxidant, the mixed liquid and the oxidant can fully react while washing the inner wall of the reactor body, and the crystals generated in the reaction can be prevented from adhering to the inner wall of the reactor body.

Description

Technical Field

[0001] This utility model relates to the field of ferric phosphate production technology, specifically to an anti-crystallization reaction device in the ferric phosphate production process. Background Technology

[0002] Battery-grade anhydrous iron phosphate is a raw material used to prepare cathode materials for lithium iron phosphate batteries. Lithium iron phosphate batteries have advantages such as high operating voltage, high energy density, good cycle life, and good safety performance, and are widely used in power tools, electric bicycles, electric vehicles, energy storage power stations, and other fields. The preparation process of anhydrous iron phosphate often involves reactors for material mixing, such as the mixing reaction of iron salt solutions with oxidants. Hydrogen peroxide is a commonly used oxidant. Existing reactor technologies include... Figure 1 As shown, the reactor has multiple layers of baffles on its inner wall. A mixed liquid inlet is located at the top of the reactor, and an inclined oxidant inlet is located on the side. After the mixed liquid and oxidant enter the reactor, they are mixed and reacted through the baffles. During the oxidation process, an excess of oxidant is required to ensure sufficient oxidation rate of iron. Severe crystallization can easily occur during the reaction. Some crystals adhere to the inner wall of the reactor, altering the originally designed material flow rate and direction, thus changing the reaction conditions and the reaction results. This leads to poor product quality consistency. Furthermore, in actual production, a significant amount of manpower is required to clean the crystals from the reactor. Production cannot proceed during the cleaning process, impacting reaction consistency and production capacity. Utility Model Content

[0003] To address the shortcomings of existing technologies, the technical problem solved by this utility model is to provide an anti-crystallization reaction device in the production process of ferric phosphate, thereby solving the problem that existing reactors are prone to crystal formation and adhesion to the inner wall, resulting in poor product quality consistency.

[0004] To solve the above problems, the technical solution adopted by this utility model is: an anti-crystallization reaction device in the production of iron phosphate, including a reactor body, the reactor body being cylindrical in shape, the inner wall of the reactor being provided with a smooth material, a mixed liquid conduit being provided in the middle of the side wall of the reactor body, the mixed liquid conduit being arranged along the tangent direction of the inner wall of the horizontal cross section of the reactor body, an oxidant conduit being provided above the reactor, the oxidant conduit extending vertically into the reactor body and extending to the bottom of the mixed liquid conduit, and a sprayer being provided at the end of the oxidant conduit located inside the reactor.

[0005] Furthermore, the diameter of the mixing conduit is less than or equal to the radius of the reactor body.

[0006] Furthermore, the sprayer is a spiral nozzle or a hollow cone nozzle.

[0007] Furthermore, the outer wall of the oxidant conduit is also provided with a smooth material.

[0008] Furthermore, the smoothing material is a polytetrafluoroethylene or polyphenylene sulfide coating.

[0009] The beneficial effects of this solution are as follows: Compared with the prior art, the anti-crystallization reaction device in the production process of iron phosphate of this utility model improves the smoothness of the inner wall by setting a smooth material on the inner wall of the reactor body, setting a mixed liquid conduit to make the mixed liquid swirl in the reactor body, and setting a sprayer at the end of the oxidant conduit to atomize the oxidant. This allows the mixed liquid and oxidant to react fully while rinsing the inner wall of the reactor body, preventing the crystals generated during the reaction from adhering to the inner wall of the reactor body, thereby ensuring the consistency of product quality. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a reactor in the prior art; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the flow direction of the mixture according to this utility model; In the diagram: 1. Reactor body; 2. Mixed liquid conduit; 3. Oxidant conduit; 4. Sprayer. Detailed Implementation

[0011] 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.

[0012] Implementation, for example, attached Figures 2 to 3 As shown: A device for preventing crystallization in the production of ferric phosphate includes a reactor body 1, which is cylindrical in shape. The inner wall of the reactor is made of a smooth material to prevent crystals from adhering to the inner wall. A mixing liquid conduit 2 is provided in the middle of the side wall of the reactor body 1. The mixing liquid conduit 2 is arranged tangentially to the inner wall of the horizontal cross-section of the reactor body 1, so that the mixed liquid enters the reactor body 1 through the mixing liquid conduit 2 and undergoes swirling motion. The diameter of the mixing liquid conduit 2 is less than or equal to the radius of the reactor body 1 to ensure that the mixed liquid undergoes swirling motion after entering the reactor. The flow direction of the mixed liquid is as follows. Figure 3As shown, the mixture enters the reactor body 1 from the mixture conduit 2 and swirls along the inner wall of the reactor body 1. An oxidant conduit 3 is located above the reactor, extending vertically into the reactor body 1 and reaching below the mixture conduit 2. A sprayer 4 is located at the end of the oxidant conduit 3 inside the reactor. The oxidant is atomized through the sprayer 4, increasing the reaction contact area between the mixture and the oxidant, ensuring a complete reaction. The sprayer 4 is a spiral nozzle or a hollow conical nozzle, characterized by a large spray area and good atomization effect, which can ensure oxygen... The oxidant reacts fully with the mixture. The outer wall of the oxidant conduit 3 is also provided with a smooth material. After the mixture reacts with the oxidant, it will come into contact with the outer wall of the oxidant conduit 3 when it undergoes a swirling motion in the reactor. The smooth material on the outer wall of the oxidant conduit 3 can prevent crystals from adhering to the outer wall of the oxidant conduit 3. The smooth material is a polytetrafluoroethylene or polyphenylene sulfide coating, which has the characteristics of being resistant to acids and alkalis, resistant to various organic solvents, resistant to high temperatures, has an extremely low coefficient of friction, high chemical stability, and high smoothness, which can effectively prevent crystals from adhering to the inner wall of the reactor body 1.

[0013] The specific implementation process is as follows: In use, the mixture enters the reactor through the mixture conduit 2 and undergoes swirling motion. The oxidant, after being atomized by the sprayer 4 through the oxidant conduit 3, reacts with the mixture. By changing the flow pattern of the mixture and the discharge pattern of the oxidant, the contact area between the mixture and the oxidant is increased, resulting in a more complete reaction. The inner wall of the reactor is made of a smooth material, which makes it difficult for crystals generated during the reaction to adhere to the inner wall. Furthermore, the swirling motion of the mixture can also wash the inner wall of the reactor, effectively preventing crystal adhesion. This alters the originally designed material flow rate and direction, thus changing the reaction conditions and ensuring the consistency of product quality.

[0014] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for preventing crystallization in the production of ferric phosphate, comprising a reactor body, wherein the reactor body is generally cylindrical, characterized in that: The inner wall of the reactor is made of a smooth material. A mixed liquid conduit is provided in the middle of the side wall of the reactor body. The mixed liquid conduit is arranged along the tangent of the inner wall of the horizontal cross section of the reactor body. An oxidant conduit is provided above the reactor. The oxidant conduit extends vertically into the reactor body and extends to the bottom of the mixed liquid conduit. A sprayer is provided at the end of the oxidant conduit inside the reactor.

2. The anti-crystallization reaction device in the production process of ferric phosphate according to claim 1, characterized in that: The diameter of the mixing conduit is less than or equal to the radius of the reactor body.

3. The anti-crystallization reaction device in the production process of ferric phosphate according to claim 1, characterized in that: The sprayer is a spiral nozzle or a hollow cone nozzle.

4. The anti-crystallization reaction device in the production process of ferric phosphate according to claim 1, characterized in that: The outer wall of the oxidant conduit is also provided with a smooth material.

5. The anti-crystallization reaction device in the production process of ferric phosphate according to claim 1 or 4, characterized in that: The smooth material is a polytetrafluoroethylene or polyphenylene sulfide coating.

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