Synthesis system of iron phosphate

Abstract

The utility model provides an iron phosphate synthesis system and relates to the technical field of iron phosphate preparation. The iron phosphate synthesis system comprises an oxidation unit and an aging unit, wherein the oxidation unit comprises a jet mixer, a hydrogen peroxide feeding pipe, a ferrite solution feeding pipe and a phosphorus source solution feeding pipe; the jet mixer comprises a suction inlet, a first input port and a second input port, the suction inlet is connected with the hydrogen peroxide feeding pipe, the first input port is connected with the ferrite solution feeding pipe, and the second input port is connected with the phosphorus source solution feeding pipe. The ferrite solution and the phosphorus source solution enter the jet flow mixer to form jet flow, so that a Venturi effect is generated, and micro negative pressure is formed near a throat of the jet flow mixer. When hydrogen peroxide is self-decomposed at high temperature to generate oxygen, the formed positive pressure is partially counteracted by the micro-negative pressure formed by the Venturi effect, so that normal feeding of the ferrite solution and the phosphorus source solution is ensured, and the accuracy of material metering is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of iron phosphate preparation, in particular to a synthesis system of iron phosphate. Background Art

[0002] With the popularization of new energy vehicles, the research on power batteries has become one of the hot topics. The precursors of power batteries are represented by ternary and lithium iron phosphate. High-nickel series ternary precursors are popular because of their high capacity, high tap density, fast charge and discharge, and long endurance, but their safety problems have become a major problem. Therefore, lithium iron phosphate materials with good safety performance, long cycle life, low cost and other advantages have gradually attracted people's attention and are expected to have a broader application prospect in the field of energy storage batteries in the future.

[0003] Iron phosphate is the most important synthetic raw material for lithium iron phosphate. The current iron phosphate process in the industry has problems such as poor consistency in iron-phosphorus ratio, particle size, etc. between products of the same batch or different batches, resulting in unqualified iron phosphate products. Summary of the Utility Model

[0004] Technicians found that in the process of synthesizing iron phosphate products with materials such as phosphorus source, ferrous salt, and hydrogen peroxide, as the oxidation reaction proceeds, the temperature in the oxidation reaction system rises, and hydrogen peroxide is prone to self-decompose to generate oxygen at high temperature, forming a positive pressure. This positive pressure can cause the pipes of the phosphorus source solution and the ferrous salt solution to be blocked by pressure, and even cause the oxygen-containing foamy mixture to flow back into the pipes of the phosphorus source solution and / or the ferrous salt solution to form cavities, thereby affecting the metering accuracy of the phosphorus source solution and the ferrous salt solution, resulting in unqualified iron-phosphorus ratio and particle size of the iron phosphate products.

[0005] In order to solve the problem of low stability of iron-phosphorus ratio and particle size in the prior art, the utility model provides a synthesis system of iron phosphate.

[0006] The utility model provides the following technical solutions:

[0007] A synthesis system of iron phosphate includes an oxidation unit and an aging unit. The oxidation unit includes a jet mixer, a hydrogen peroxide feed pipe, a ferrous salt solution feed pipe, and a phosphorus source solution feed pipe;

[0008] The jet mixer includes a suction port, a first input port, and a second input port. The suction port is connected to the hydrogen peroxide feed pipe, the first input port is connected to the ferrous salt solution feed pipe, and the second input port is connected to the phosphorus source solution feed pipe.

[0009] As a further alternative solution to the synthesis system of the iron phosphate, the jet mixer includes a nozzle, a mixing chamber, a diffusion chamber, and a suction chamber. The nozzle, the mixing chamber, and the diffusion chamber are connected in sequence, and at least a part of the nozzle and at least a part of the mixing chamber penetrate through the suction chamber.

[0010] As a further alternative solution to the synthesis system of the iron phosphate, at one end of the nozzle away from the mixing chamber, the first input port and the second input port are provided, and at one end of the nozzle close to the mixing chamber, a throat and a suction channel are provided;

[0011] The suction chamber includes the suction port, and the suction chamber is communicated with the nozzle through the suction channel.

[0012] As a further alternative solution to the synthesis system of the iron phosphate, the oxidation unit further includes a hydrogen peroxide high-level tank, a ferrous salt solution high-level tank, and a phosphorus source solution high-level tank. The bottom end of the hydrogen peroxide high-level tank is connected to one end of the hydrogen peroxide feed pipe away from the jet mixer, the bottom end of the ferrous salt solution high-level tank is connected to one end of the ferrous salt solution feed pipe away from the jet mixer, and the bottom end of the phosphorus source solution high-level tank is connected to one end of the phosphorus source solution feed pipe away from the jet mixer.

[0013] As a further alternative solution to the synthesis system of the iron phosphate, the aging unit includes a crystal conversion unit and a crystal cultivation unit. The discharge port of the jet mixer is connected to the feed port of the crystal conversion unit, and the discharge port of the crystal conversion unit is connected to the feed port of the crystal cultivation unit.

[0014] As a further alternative solution to the synthesis system of the iron phosphate, the crystal conversion unit includes an emulsifying pump and a steam pipeline. The emulsifying pump includes a first feed port and a second feed port. The first feed port is connected to the discharge port of the jet mixer, and the second feed port is connected to the steam pipeline.

[0015] As a further alternative solution to the synthesis system of the iron phosphate, a heat preservation layer is provided on the pump head of the emulsifying pump.

[0016] As a further alternative solution to the synthesis system of the iron phosphate, the crystal cultivation unit includes a crystal cultivation tank, and the crystal cultivation tank includes a tank body and a central cylinder;

[0017] The central cylinder is arranged in the tank body. A third feed port is provided at the top of the central cylinder. The third feed port is connected to the discharge port of the crystal conversion unit. The bottom end of the central cylinder is provided with an open end, and the bottom end face of the central cylinder is spaced from the bottom of the tank body;

[0018] An overflow port is provided at the upper part of the tank wall of the tank body.

[0019] As a further optional solution for the synthesis system of the iron phosphate, the crystal growth tank further includes a stirring assembly, and the stirring assembly is disposed inside the central cylinder.

[0020] As a further optional solution for the synthesis system of the iron phosphate, the stirring assembly includes a stirring shaft, stirring blades and a stirring motor. The stirring shaft is rotatably disposed inside the central cylinder. The stirring blades are disposed inside the central cylinder and are connected to the stirring shaft. The driving end of the stirring motor is connected to the stirring shaft.

[0021] The embodiments of the present utility model have the following beneficial effects:

[0022] The above synthesis system can realize continuous feeding and discharging, that is, oxidation, crystal transformation and crystal growth are carried out simultaneously. Therefore, this synthesis system is a continuous synthesis system for iron phosphate.

[0023] During the operation of the above continuous synthesis system, the ferrous salt solution is transported to the first input port of the jet mixer through the ferrous salt solution feed pipe, and the phosphorus source solution is transported to the second input port of the jet mixer through the phosphorus source solution feed pipe, and a jet is formed inside the jet mixer, thereby generating the Venturi effect, forming a micro-negative pressure near the throat of the jet mixer, and then steadily bringing hydrogen peroxide into the jet mixer through the suction port and the hydrogen peroxide feed pipe. As the reaction process proceeds, the temperature inside the system rises. The positive pressure formed by the oxygen generated by the self-decomposition of hydrogen peroxide at high temperature is partially offset by the micro-negative pressure formed by the Venturi effect, and a weak negative pressure range is formed inside the jet mixer, thereby ensuring the normal feeding of the ferrous salt solution and the phosphorus source solution, further ensuring the accuracy of material metering, improving the consistency of the iron-phosphorus ratio of the iron phosphate product, and finally improving the qualified rate of the iron phosphate product.

[0024] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0026] Figure 1 Shows the overall structural schematic diagram of a synthesis system for iron phosphate provided by an embodiment of the present utility model;

[0027] Figure 2 The structural schematic diagram of a jet mixer in a synthetic system of iron phosphate provided by an embodiment of the present utility model is shown;

[0028] Figure 3 The structural schematic diagram of a crystal conversion unit in a synthetic system of iron phosphate provided by an embodiment of the present utility model is shown;

[0029] Figure 4 The structural schematic diagram of a crystal cultivation tank in a synthetic system of iron phosphate provided by an embodiment of the present utility model is shown.

[0030] Description of main component symbols:

[0031] 100 - Oxidation unit; 110 - Jet mixer; 111 - Nozzle; 111a - First input port; 111b - Second input port; 112 - Mixing chamber; 113 - Diffusion chamber; 114 - Suction chamber; 114a - Suction port; 115 - Throat; 116 - Suction channel; 120 - Hydrogen peroxide feed pipe; 130 - Ferrous salt solution feed pipe; 140 - Phosphorus source solution feed pipe; 150 - Hydrogen peroxide elevated tank; 160 - Ferrous salt solution elevated tank; 170 - Phosphorus source solution elevated tank; 200 - Crystal conversion unit; 210 - Emulsifying pump; 211 - Base; 212 - Driving motor; 213 - Pump head; 213a - First feed port; 213b - Second feed port; 220 - Steam pipe; 300 - Crystal cultivation unit; 310 - Crystal cultivation tank; 311 - Tank body; 311a - Overflow port; 312 - Central cylinder; 312a - Third feed port; 313 - Stirring assembly; 313a - Stirring shaft; 313b - Stirring blade; 313c - Stirring motor. Detailed implementation manners

[0032] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the drawings below are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0034] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] Embodiment

[0038] Please refer to Figure 1 and Figure 2 , this embodiment provides a continuous synthesis system for iron phosphate, specifically a system for continuously producing battery-grade iron phosphate (hereinafter referred to as "continuous synthesis system" for short). The continuous synthesis system includes an oxidation unit 100 and an aging unit. The oxidation unit 100 includes a jet mixer 110, a hydrogen peroxide feed pipe 120, an iron salt solution feed pipe 130, and a phosphorus source solution feed pipe 140.

[0039] Among them, the jet mixer 110 includes a suction port 114a, a first input port 111a, and a second input port 111b. The suction port 114a is connected to the hydrogen peroxide feed pipe 120, the first input port 111a is connected to the iron salt solution feed pipe 130, and the second input port 111b is connected to the phosphorus source solution feed pipe 140.

[0040] During the operation of the above continuous synthesis system, the ferrous salt solution is transported to the first input port 111a of the jet mixer 110 through the ferrous salt solution feed pipe 130, and the phosphorus source solution is transported to the second input port 111b of the jet mixer 110 through the phosphorus source solution feed pipe 140. The ferrous salt solution and the phosphorus source solution enter the jet mixer 110 together to form a jet, thereby generating a Venturi effect, forming a micro-negative pressure near the throat 115 of the jet mixer 110, and then steadily introducing hydrogen peroxide into the jet mixer 110 through the suction port 114a and the hydrogen peroxide feed pipe 120. When hydrogen peroxide decomposes spontaneously to generate oxygen at high temperature, the positive pressure formed is partially offset by the micro-negative pressure formed by the Venturi effect, and a weak negative pressure range is formed in the jet mixer 110, thereby ensuring the normal feeding of the ferrous salt solution and the phosphorus source solution, further ensuring the accuracy of material metering, improving the consistency of the iron-to-phosphorus ratio of the iron phosphate product, and finally improving the qualification rate of the iron phosphate product.

[0041] In contrast, if the hydrogen peroxide feed pipe 120 is connected to the input port of the jet mixer 110, the positive pressure formed by the spontaneous decomposition of hydrogen peroxide at high temperature can cause the ferrous salt solution feed pipe 130 and the phosphorus source solution feed pipe 140 to be blocked, and even cause the oxygen-containing foamy mixture to flow back into the ferrous salt solution feed pipe 130 and the phosphorus source solution feed pipe 140 to form cavities, thereby affecting the metering accuracy of the ferrous salt solution and the phosphorus source solution and resulting in unqualified iron-to-phosphorus ratio and particle size of the iron phosphate product.

[0042] It can be understood that the ferrous salt solution and the phosphorus source solution together form a jet solution in the jet mixer 110, and the jet ferrous salt solution and the phosphorus source solution together affect the pressure range in the jet mixer 110, thereby affecting the metering accuracy of the ferrous salt solution and the phosphorus source solution.

[0043] Optionally, the phosphorus source solution is selected from one or more of phosphoric acid, monoammonium phosphate, diammonium hydrogen phosphate, and sodium dihydrogen phosphate.

[0044] In some embodiments, the oxidation unit 100 further includes a hydrogen peroxide high-level tank 150, a ferrous salt solution high-level tank 160, and a phosphorus source solution high-level tank 170.

[0045] Among them, the bottom end of the hydrogen peroxide high-level tank 150 is connected to the end of the hydrogen peroxide feed pipe 120 far from the jet mixer 110, the bottom end of the ferrous salt solution high-level tank 160 is connected to the end of the ferrous salt solution feed pipe 130 far from the jet mixer 110, and the bottom end of the phosphorus source solution high-level tank 170 is connected to the end of the phosphorus source solution feed pipe 140 far from the jet mixer 110.

[0046] During operation, the hydrogen peroxide high-level tank 150 stores a certain amount of hydrogen peroxide from the tank farm and continuously supplies hydrogen peroxide to the jet mixer 110 through the hydrogen peroxide feed pipe 120.

[0047] In addition, a valve and a flow meter are provided on the hydrogen peroxide feed pipe 120 to monitor and regulate the amount of hydrogen peroxide supplied to the jet mixer 110.

[0048] Similarly, the ferrous salt solution elevated tank 160 stores a certain amount of ferrous salt solution from the tank farm and continuously supplies the ferrous salt solution to the jet mixer 110 through the ferrous salt solution feed pipe 130.

[0049] In addition, a valve and a flow meter are also provided on the ferrous salt solution feed pipe 130 to monitor and regulate the amount of ferrous salt solution supplied to the jet mixer 110.

[0050] The phosphorus source solution elevated tank 170 stores a certain amount of phosphorus source solution from the tank farm and continuously supplies the phosphorus source solution to the jet mixer 110 through the phosphorus source solution feed pipe 140.

[0051] In addition, a valve and a flow meter are also provided on the phosphorus source solution feed pipe 140 to monitor and regulate the amount of phosphorus source solution supplied to the jet mixer 110.

[0052] Please refer to Figure 2 , specifically, the jet mixer 110 includes a nozzle 111, a mixing chamber 112, a diffusion chamber 113 and a suction chamber 114. The nozzle 111, the mixing chamber 112 and the diffusion chamber 113 are connected in sequence, and at least a part of the nozzle 111 and at least a part of the mixing chamber 112 penetrate through the suction chamber 114.

[0053] Wherein, one end of the nozzle 111 away from the mixing chamber 112 is provided with a first input port 111a and a second input port 111b, and one end of the nozzle 111 close to the mixing chamber 112 is provided with a throat 115 and a suction channel 116.

[0054] The nozzle 111 is connected to the mixing chamber 112 through the throat 115, and the suction channel 116 is arranged on the wall of the throat 115 and faces into the mixing chamber 112. Optionally, the suction channel is an annular hole on the throat wall; optionally, the suction channel is small holes arranged at intervals on the throat wall.

[0055] In addition, the suction chamber 114 includes a suction port 114a, and the suction chamber 114 is communicated with the mixing chamber 112 through the suction channel 116.

[0056] During operation, the ferrous salt solution is transported to the first input port 111a through the ferrous salt solution feed pipe 130 and then enters the inside of the nozzle 111. At the same time, the phosphorus source solution is transported to the second input port 111b through the phosphorus source solution feed pipe 140 and then enters the inside of the nozzle 111.

[0057] Subsequently, the ferrous salt solution and the phosphorus source solution flow from the end of the nozzle 111 far from the mixing chamber 112 towards the end of the nozzle 111 close to the mixing chamber 112. As the flow cross-section of the nozzle 111 gradually decreases, the flow rates of the ferrous salt solution and the phosphorus source solution gradually increase and reach the maximum when flowing into the throat 115, forming a jet flow, thereby generating the Venturi effect.

[0058] At this time, a micro-negative pressure is formed near the throat 115. Since the suction chamber 114 is connected to the mixing chamber 112 through the suction channel 116 provided on the wall of the throat 115, the inside of the suction chamber 114 is also in a state of micro-negative pressure, and then hydrogen peroxide is stably introduced into the suction chamber 114 through the suction port 114a and the hydrogen peroxide feed pipe 120.

[0059] The hydrogen peroxide further flows through the suction channel 116 and flows into the mixing chamber 112 together with the ferrous salt solution and the phosphorus source solution, mixes and reacts in the mixing chamber 112 to form a reaction slurry, and finally flows into the diffusion chamber 113.

[0060] Please refer to again Figure 1 , further, the aging unit is divided into a crystal conversion unit 200 and a crystal growth unit 300.

[0061] Among them, the discharge port of the jet mixer 110 is connected to the feed port of the crystal conversion unit 200, specifically, the end of the diffusion chamber 113 far from the mixing chamber 112 is connected to the feed port of the crystal conversion unit 200. In addition, the discharge port of the crystal conversion unit 200 is connected to the feed port of the crystal growth unit 300.

[0062] During operation, the reaction slurry flows into the crystal conversion unit 200 from the end of the diffusion chamber 113 far from the mixing chamber 112, and is converted from amorphous iron phosphate to crystalline iron phosphate dihydrate in the crystal conversion unit 200 to form an iron phosphate dihydrate slurry.

[0063] Subsequently, the iron phosphate dihydrate slurry flows from the discharge port of the crystal conversion unit 200 into the feed port of the crystal growth unit 300. The crystalline iron phosphate dihydrate further agglomerates in the crystal growth unit 300 to form agglomerated iron phosphate dihydrate meeting the particle size requirements, and then enters the next process.

[0064] Please refer to together Figure 1 and Figure 3 , specifically, the crystal conversion unit 200 includes an emulsifying pump 210 and a steam pipeline 220.

[0065] Among them, the emulsifying pump 210 includes a first feed port 213a and a second feed port 213b. The first feed port 213a is connected to the discharge port of the jet mixer 110, and the second feed port 213b is connected to the steam pipeline 220. In addition, the discharge port of the emulsifying pump 210 is connected to the feed port of the crystal growth unit 300.

[0066] The emulsifying pump 210 is composed of a base 211, a driving motor 212, and a pump head 213. The driving motor 212 and the pump head 213 are both installed on the base 211, and the driving end of the driving motor 212 is connected to the pump head 213. A first feed port 213a and a second feed port 213b are provided on the pump head 213, and the discharge port of the pump head 213 is connected to the feed port of the crystal-growing unit 300.

[0067] In addition, an emulsifying disk is provided inside the pump head 213, and the shearing action of the emulsifying disk makes the mass transfer effect better.

[0068] Furthermore, the pump head 213 is provided with a heat-insulating layer, which is beneficial to the material being heated to the crystal-transition temperature more rapidly.

[0069] Please refer to Figure 1 and Figure 4 specifically, the crystal-growing unit 300 includes a crystal-growing tank 310, and the crystal-growing tank 310 includes a tank body 311 and a central cylinder 312.

[0070] Among them, the central cylinder 312 is arranged inside the tank body 311. A third feed port 312a is provided at the top of the central cylinder 312, and the third feed port 312a is connected to the discharge port of the crystal-transition unit 200. The bottom end of the central cylinder 312 is open, and the bottom end face of the central cylinder 312 is spaced from the bottom of the tank body 311.

[0071] In addition, an overflow port 311a is provided at the upper part of the tank wall of the tank body 311.

[0072] During operation, the ferrous phosphate dihydrate slurry flows from the discharge port of the emulsifying pump 210 into the third feed port 312a, and then flows into the central cylinder 312. The slurry flows downward in the central cylinder 312, and then flows out of the bottom opening of the central cylinder 312 to the outside of the central cylinder 312, and flows upward between the outer wall of the central cylinder 312 and the tank wall of the tank body 311. During this process, the crystalline ferrous phosphate dihydrate further agglomerates to form agglomerated ferrous phosphate dihydrate meeting the particle size requirements, and then overflows through the overflow port 311a into the next process.

[0073] Furthermore, the crystal-growing tank 310 further includes a stirring assembly 313, and the stirring assembly 313 is arranged inside the central cylinder 312.

[0074] During operation, the stirring assembly 313 is used to stir the slurry, and by adjusting the stirring speed and the residence time of the slurry in the crystal-growing tank 310, agglomerated ferrous phosphate dihydrate meeting the particle size requirements is formed.

[0075] In some embodiments, the stirring assembly 313 is composed of a stirring shaft 313a, stirring blades 313b, and a stirring motor 313c.

[0076] Among them, the stirring shaft 313a is rotatably arranged in the central cylinder 312, and the axis of the stirring shaft 313a coincides with the axis of the central cylinder 312. The stirring blade 313b is arranged in the central cylinder 312 and connected to the stirring shaft 313a. In addition, the top end of the stirring shaft 313a penetrates through the central cylinder 312 and is connected to the driving end of the stirring motor 313c.

[0077] During operation, the stirring motor 313c drives the stirring shaft 313a to rotate, thereby driving the stirring blade 313b to rotate around the axis of the stirring shaft 313a to stir the slurry.

[0078] In some embodiments, the above continuous synthesis system further includes one or more post-treatment units, including but not limited to a washing and filtering unit, a drying unit, and a sintering unit.

[0079] In summary, the above continuous synthesis system can realize the continuous operation of the iron phosphate synthesis reaction, and maximize the uniformity and consistency of the iron phosphate product. The continuous synthesis system uses a jet mixer to premix the materials, avoiding the fluctuation of the material flow caused by the oxygen-containing foamy mixture generated during the oxidation of hydrogen peroxide, thereby avoiding affecting the metering accuracy of each material, and further avoiding affecting the iron-phosphorus ratio of the iron phosphate product. At the same time, the utilization rate of hydrogen peroxide is improved.

[0080] In addition, the above continuous synthesis system uses an emulsifying pump 210 to mix the materials, enabling the steam to directly contact the materials, thereby increasing the heat transfer and mass transfer effects of the materials, making full use of the reaction heat and the latent heat of the steam to achieve the uniformity of material crystal transformation. At the same time, the equipment is simple and easy to maintain, avoiding the disadvantages of micro-reactor clogging and complex and costly tower equipment structures.

[0081] In all the examples shown and described here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may include different values.

[0082] It should be noted that: similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0083] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A synthesis system for iron phosphate, characterized in that, It includes an oxidation unit and an aging unit. The oxidation unit includes a jet mixer, a hydrogen peroxide feed pipe, a ferrous salt solution feed pipe, and a phosphorus source solution feed pipe. The jet mixer includes a suction port, a first input port, and a second input port. The suction port is connected to the hydrogen peroxide feed pipe, the first input port is connected to the ferrous salt solution feed pipe, and the second input port is connected to the phosphorus source solution feed pipe.

2. The synthesis system of iron phosphate according to claim 1, characterized in that, The jet mixer includes a nozzle, a mixing chamber, a diffusion chamber, and a suction chamber. The nozzle, the mixing chamber, and the diffusion chamber are connected in sequence, and at least a part of the nozzle and at least a part of the mixing chamber penetrate through the suction chamber.

3. The synthesis system of iron phosphate according to claim 2, characterized in that The first input port and the second input port are provided at one end of the nozzle away from the mixing chamber, and a throat and a suction channel are provided at one end of the nozzle close to the mixing chamber. The suction chamber includes the suction port, and the suction chamber is communicated with the mixing chamber through the suction channel.

4. The synthesis system of iron phosphate according to claim 1, wherein The oxidation unit further includes a hydrogen peroxide high-level tank, a ferrous salt solution high-level tank, and a phosphorus source solution high-level tank. The bottom end of the hydrogen peroxide high-level tank is connected to one end of the hydrogen peroxide feed pipe away from the jet mixer, the bottom end of the ferrous salt solution high-level tank is connected to one end of the ferrous salt solution feed pipe away from the jet mixer, and the bottom end of the phosphorus source solution high-level tank is connected to one end of the phosphorus source solution feed pipe away from the jet mixer.

5. The synthesis system of iron phosphate according to any one of claims 1-4, characterized in that, The aging unit includes a crystal conversion unit and a crystal growth unit. The discharge port of the jet mixer is connected to the feed port of the crystal conversion unit, and the discharge port of the crystal conversion unit is connected to the feed port of the crystal growth unit.

6. The synthesis system of iron phosphate according to claim 5, wherein, The crystal conversion unit includes an emulsifying pump and a steam pipe. The emulsifying pump includes a first feed port and a second feed port. The first feed port is connected to the discharge port of the jet mixer, and the second feed port is connected to the steam pipe.

7. The synthesis system of iron phosphate according to claim 6, wherein The pump head of the emulsifying pump is provided with a heat preservation layer.

8. The synthesis system of iron phosphate according to claim 5, wherein, The crystal growth unit includes a crystal growth tank, and the crystal growth tank includes a tank body and a central cylinder. The central cylinder is arranged in the tank body. A third feed port is provided at the top of the central cylinder, and the third feed port is connected to the discharge port of the crystal conversion unit. The bottom end of the central cylinder is open, and the bottom end face of the central cylinder is spaced from the bottom of the tank body. An overflow port is provided at the upper part of the tank wall of the tank body.

9. The synthesis system of iron phosphate according to claim 8, characterized in that, The crystal growth tank further includes a stirring assembly, and the stirring assembly is arranged in the central cylinder.

10. The synthesis system of iron phosphate according to claim 9, characterized in that, The stirring assembly includes a stirring shaft, stirring blades, and a stirring motor. The stirring shaft is rotatably arranged in the central cylinder. The stirring blades are arranged in the central cylinder and connected to the stirring shaft. The driving end of the stirring motor is connected to the stirring shaft.

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