Iron phosphate sintering system

Abstract

The utility model provides an iron phosphate sintering system which comprises a first stock bin, a rotary furnace hot kiln, a rotary kiln cold kiln, an online particle size analyzer and a temperature detector, the first stock bin is communicated with the feeding end of the rotary furnace hot kiln through a feeding pipe, the first stock bin is used for feeding materials to the rotary furnace hot kiln, and the frequency of the first stock bin is adjustable; the feeding end of the rotary kiln cold kiln is communicated with the discharging end of the rotary kiln hot kiln through a pipeline, the online particle size analyzer is fixed to the feeding pipe and used for detecting the particle size of materials fed to the rotary kiln hot kiln from the first stock bin, and the temperature detector is fixed to the discharging end of the rotary kiln hot kiln and used for detecting the temperature of the discharging end of the rotary kiln hot kiln. The online particle size analyzer can detect the particle size of materials conveyed to the rotary furnace hot kiln from the first stock bin, and the temperature detector can detect the temperature of the discharging end of the rotary furnace hot kiln, so that workers can conveniently adjust the feeding frequency, the material stacking condition in the rotary furnace hot kiln is adjustable, and the yield of iron phosphate sintering is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of iron phosphate treatment, in particular to an iron phosphate sintering system. Background Art

[0002] With the large-scale popularization of electric vehicles and electrochemical energy storage, the market demand for lithium iron phosphate has increased dramatically. In order to continuously improve the electrochemical and safety performance of batteries, the requirements for the stability of lithium iron phosphate cathode materials are becoming increasingly stringent, and the stability of iron phosphate, the precursor of lithium iron phosphate, is also gradually tightened. The specific surface area, which is a key indicator of iron phosphate, also needs to be tightened.

[0003] At present, there are three main processes for the production of iron phosphate: ammonia process, sodium process and iron process. Among them, the iron process has attracted more and more attention from enterprises due to its advantages such as simple process and low energy consumption. However, for the iron process, because the iron process has a large particle size, the production line may produce abnormal small-size iron phosphate dihydrate particles. The fluctuation of the particle size of iron phosphate dihydrate will cause the property of the iron phosphate material to change, which will lead to abnormal sintering process of iron phosphate. For example, the smaller the particle size, the lower the bulk density, the thicker the material accumulation in the rotary kiln, the worse the sintering effect, and the higher the specific surface area. The larger the particle size, the higher the bulk density, the lower the material accumulation thickness in the rotary kiln, the better the sintering effect, and the lower the specific surface area. Production anomalies lead to abnormal particle size of ferric phosphate dihydrate, which makes the specific surface area of ​​sintered anhydrous ferric phosphate fluctuate abnormally. Now, samples after sintering in the kiln are often taken to test the specific surface area, and then the specific surface area is followed up to adjust the kiln or judge whether the product is normal. On the one hand, it takes 2 to 4 hours for the kiln to discharge the material, and the specific surface area test often takes 1 to 4 hours. The timeliness of judging or adjusting the kiln feeding based on the specific surface area is poor. From abnormality to adjustment, more abnormal materials have often been produced. These abnormal materials will lead to a decrease in the production qualification rate. Utility Model Content

[0004] In view of this, it is necessary to provide an iron phosphate sintering system that can detect iron phosphate dihydrate in real time to facilitate real-time adjustment and improve yield.

[0005] The utility model provides an iron phosphate sintering system, comprising: a first material bin, a rotary kiln, a rotary kiln cold kiln, an online particle size analyzer and a temperature detector, wherein the first material bin is connected with the feed end of the rotary kiln through a feeding pipe, and the first material bin is used for feeding materials to the rotary kiln with an adjustable frequency; the feed end of the rotary kiln cold kiln is connected with the discharge end of the rotary kiln through a pipeline, the online particle size analyzer is fixed on the feeding pipe, and is used for detecting the particle size of the material sent from the first material bin to the rotary kiln, and the temperature detector is fixed at the discharge end of the rotary kiln, and is used for detecting the temperature of the discharge end of the rotary kiln.

[0006] Optionally, the first silo includes a silo body and a discharge valve, the silo body is vertically fixed on a reliable ground, the top of the silo body is a material pouring inlet, the bottom of the silo body is a material discharge outlet, the discharge valve is fixed at the material discharge outlet, and the discharge valve is opened and closed to adjust the material supply.

[0007] Optionally, the first silo further includes a weighing device, which is fixed on a reliable ground, and the silo body is fixed on the weighing device, and the weighing device is used to measure the weight of the silo body.

[0008] Optionally, the rotary kiln hot kiln includes a hot kiln base, a hot kiln body, a rotating cylinder and a heating module. The hot kiln body is rotatably fixed on the hot kiln base. The rotating cylinder is connected to the hot kiln body and is used to drive the hot kiln body to rotate relative to the hot kiln base. The heating module is fixed on the surface of the hot kiln base facing the hot kiln body and is used to heat the hot kiln body.

[0009] Optionally, the hot kiln body is arranged at an inclination, the higher end of the hot kiln body is the feeding end, which is connected to the first silo, and the lower end of the hot kiln body is the discharging end, which is connected to the rotary kiln cooling kiln.

[0010] Optionally, an output gear is fixed on the output end of the rotating oil cylinder, a rotating gear is sleeved on the outer circumference of the hot kiln furnace body, and the output gear is meshed with the rotating gear.

[0011] Optionally, the heating module includes a plurality of gas furnaces, and the plurality of gas furnaces are fixed at intervals on a surface of the hot kiln base facing the hot kiln body.

[0012] Optionally, the rotary kiln cold kiln includes a cold kiln base, a cold kiln body, a rotating cylinder and a cooling module. The cold kiln body is rotatably fixed on the cold kiln base. The rotating cylinder is connected to the cold kiln body and is used to drive the cold kiln body to rotate relative to the cold kiln base. The cooling module is fixed on the outer surface of the cold kiln body and is used to cool the cold kiln body.

[0013] Optionally, a driving gear is fixed on the output end of the rotating oil cylinder, a rotating gear is sleeved on the outer circumference of the cold kiln furnace body, and the driving gear is meshed with the rotating gear.

[0014] Optionally, the cooling module includes a sleeve and a coolant circulator, the sleeve is mounted on the outer surface of the cold kiln body, the sleeve is hollow and filled with coolant, the coolant circulator is connected to the sleeve through a pipeline, so that the coolant circulates between the coolant circulator and the sleeve.

[0015] The beneficial effects of the utility model are:

[0016] The iron phosphate sintering system proposed in the utility model comprises an online particle size analyzer and a temperature detector. The online particle size analyzer can detect the particle size of the material sent from the first material bin to the rotary kiln, and the temperature detector can detect the temperature of the discharge end of the rotary kiln, so that workers can adjust the feeding frequency to make the material accumulation condition in the rotary kiln adjustable, thereby ensuring the yield of iron phosphate sintering. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of the iron phosphate sintering system in the utility model;

[0019] Among them: 1-first silo, 11-silo body, 12-discharging valve, 13-weighing device, 2-rotary kiln hot kiln, 21-hot kiln base, 22-hot kiln body, 23-heating module, 231-gas furnace, 3-rotary kiln cold kiln, 31-cold kiln base, 32-cold kiln body, 33-cooling module, 331-sleeve, 4-online particle size analyzer, 5-temperature detector. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0021] like Figure 1 As shown, an embodiment of the utility model provides an iron phosphate sintering system, which includes: a first silo 1, a rotary kiln 2, a rotary kiln cold kiln 3, an online particle size analyzer 4 and a temperature detector 5. The first silo 1 is connected to the feed end of the rotary kiln 2 through a feeding pipe, and the first silo 1 is used to feed the rotary kiln 2 with an adjustable frequency; the feed end of the rotary kiln cold kiln 3 is connected to the discharge end of the rotary kiln 2 through a pipeline, the online particle size analyzer 4 is fixed on the feeding pipe, and is used to detect the particle size of the material sent from the first silo 1 to the rotary kiln 2, and the temperature detector 5 is fixed at the discharge end of the rotary kiln 2, and is used to detect the temperature of the discharge end of the rotary kiln 2.

[0022] The iron phosphate sintering system proposed in the utility model includes an online particle size analyzer 4 and a temperature detector 5. The online particle size analyzer 4 can detect the particle size of the material sent from the first silo 1 to the rotary kiln 2, and the temperature detector 5 can detect the temperature of the discharge end of the rotary kiln 2, so that the worker can adjust the feeding frequency, so that the material accumulation condition in the rotary kiln 2 can be adjusted, thereby ensuring the yield of iron phosphate sintering.

[0023] Specifically, the first silo 1 includes a silo body 11 and a discharge valve 12. The silo body 11 is vertically fixed on a reliable ground. The top of the silo body 11 is a material inlet, and the bottom of the silo body 11 is a material outlet. The discharge valve 12 is fixed at the material outlet. The discharge valve 12 is opened and closed to adjust the supply of materials. By adjusting the opening time and opening interval of the discharge valve 12, the accumulation of materials in the rotary kiln 2 can be adjusted.

[0024] Furthermore, the first silo 1 further comprises a weighing device 13, the weighing device 13 is fixed on a reliable ground, the silo body 11 is fixed on the weighing device 13, and the weighing device 13 is used to measure the weight of the silo body 11. The weight of the material fed can be determined according to the weight change each time the first silo 1 discharges material.

[0025] Specifically, the rotary kiln 2 includes a hot kiln base 21, a hot kiln body 22, a rotating cylinder and a heating module 23. The hot kiln body 22 is rotatably fixed on the hot kiln base 21. The rotating cylinder is connected to the hot kiln body 22 and is used to drive the hot kiln body 22 to rotate relative to the hot kiln base 21. The heating module 23 is fixed on the surface of the hot kiln base 21 facing the hot kiln body 22 and is used to heat the hot kiln body 22.

[0026] Furthermore, the hot kiln body 22 is arranged at an angle, the higher end of the hot kiln body 22 is a feeding end, which is connected to the first silo 1 , and the lower end of the hot kiln body 22 is a discharging end, which is connected to the rotary kiln cooling kiln 3 .

[0027] Furthermore, an output gear is fixed on the output end of the rotating oil cylinder, and a rotating gear is sleeved on the outer circumference of the hot kiln furnace body 22, and the output gear meshes with the rotating gear. The output end of the rotating oil cylinder rotates, and the hot kiln furnace body 22 is driven to rotate through the output gear and the rotating gear.

[0028] In this embodiment, the heating module 23 includes a plurality of gas furnaces 231, and the plurality of gas furnaces 231 are fixed at intervals on the surface of the hot kiln base 21 facing the hot kiln body 22. The gas furnaces 231 heat the hot kiln body 22 by burning gas.

[0029] In some feasible embodiments, the heating module 23 includes a power supply device and a heating wire wound on the surface of the hot kiln furnace body 22 . The heating wire is connected to the power supply device and generates heat when powered on, thereby heating the hot kiln furnace body 22 .

[0030] Specifically, the rotary kiln cold kiln 3 includes a cold kiln base 31, a cold kiln body 32, a rotating cylinder and a cooling module 33. The cold kiln body 32 is rotatably fixed on the cold kiln base 31. The rotating cylinder is connected to the cold kiln body 32 to drive the cold kiln body 32 to rotate relative to the cold kiln base 31. The cooling module 33 is fixed on the outer surface of the cold kiln body 32 to cool the cold kiln body 32.

[0031] Furthermore, the cold kiln body 32 is arranged to be inclined, and a higher end of the cold kiln body 32 is connected to the hot kiln body 22 .

[0032] Furthermore, a driving gear is fixed on the output end of the rotating oil cylinder, and a rotating gear is sleeved on the outer circumference of the cold kiln furnace body 32, and the driving gear meshes with the rotating gear. The output end of the rotating oil cylinder rotates, and the cold kiln furnace body 32 is driven to rotate through the driving gear and the rotating gear.

[0033] Furthermore, the cooling module 33 includes a sleeve 331 and a coolant circulator. The sleeve 331 is sleeved on the outer surface of the cold kiln furnace body 32. The sleeve 331 is hollow and filled with coolant. The coolant circulator is connected to the sleeve 331 through a pipeline to achieve circulation of the coolant between the coolant circulator and the sleeve 331.

[0034] In actual use, the hot kiln furnace body 22 is heated to a set temperature (determined by the detection result of the temperature detector 5), and then ferric phosphate dihydrate is poured into the hot kiln furnace body 22 at a set feeding frequency. During the pouring process, the online particle size analyzer 4 collects and detects the particle size of ferric phosphate dihydrate. When the particle size is found to be within the set range, there is no need to adjust the feeding frequency; when the particle size is found to be smaller than the set range, the feeding frequency needs to be reduced accordingly; when the particle size is found to be larger than the set range, the feeding frequency needs to be increased accordingly; in addition, in order to prevent the online particle size analyzer from malfunctioning, when the particle size value is displayed as normal but the temperature is less than or greater than the set range, it indicates that a malfunction has occurred and the staff needs to repair the equipment.

[0035] The beneficial effects of the utility model are:

[0036] The iron phosphate sintering system proposed in the utility model comprises an online particle size analyzer and a temperature detector. The online particle size analyzer can detect the particle size of the material sent from the first material bin to the rotary kiln, and the temperature detector can detect the temperature of the discharge end of the rotary kiln, so that workers can adjust the feeding frequency to make the material accumulation condition in the rotary kiln adjustable, thereby ensuring the yield of iron phosphate sintering.

[0037] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. An iron phosphate sintering system, characterized in that: include: A first silo, a rotary kiln, a rotary kiln cold kiln, an online particle size analyzer and a temperature detector. The first silo is connected to the feed end of the rotary kiln through a feeding pipe. The first silo is used to feed materials to the rotary kiln with an adjustable frequency. The feed end of the rotary kiln cold kiln is connected to the discharge end of the rotary kiln through a pipeline. The online particle size analyzer is fixed on the feeding pipe and is used to detect the particle size of the material sent from the first silo to the rotary kiln. The temperature detector is fixed at the discharge end of the rotary kiln and is used to detect the temperature of the discharge end of the rotary kiln.

2. The iron phosphate sintering system according to claim 1, characterized in that: The first silo includes a silo body and a discharge valve. The silo body is vertically fixed on a reliable ground. The top of the silo body is a material pouring inlet, and the bottom of the silo body is a material discharge outlet. The discharge valve is fixed at the material discharge outlet, and the discharge valve is opened and closed to adjust the material supply.

3. The iron phosphate sintering system according to claim 2, characterized in that: The first silo also includes a weighing device, which is fixed on a reliable ground, and the silo body is fixed on the weighing device, and the weighing device is used to measure the weight of the silo body.

4. The iron phosphate sintering system according to claim 1, characterized in that: The rotary kiln includes a kiln base, a kiln body, a rotating oil cylinder and a heating module. The kiln body is rotatably fixed on the kiln base. The rotating oil cylinder is connected to the kiln body and is used to drive the kiln body to rotate relative to the kiln base. The heating module is fixed on the surface of the kiln base facing the kiln body and is used to heat the kiln body.

5. The iron phosphate sintering system according to claim 4, characterized in that: The hot kiln body is arranged in an inclined manner, the higher end of the hot kiln body is the feeding end, which is connected to the first material bin, and the lower end of the hot kiln body is the discharging end, which is connected to the rotary kiln cooling kiln.

6. The iron phosphate sintering system according to claim 4, characterized in that: An output gear is fixed on the output end of the rotating oil cylinder, and a rotating gear is sleeved on the outer peripheral surface of the hot kiln furnace body, and the output gear is meshed with the rotating gear.

7. The iron phosphate sintering system according to claim 4, characterized in that: The heating module comprises a plurality of gas furnaces, and the plurality of gas furnaces are fixed at intervals on the surface of the hot kiln base facing the hot kiln body.

8. The iron phosphate sintering system according to claim 1, characterized in that: The rotary kiln cold kiln comprises a cold kiln base, a cold kiln body, a rotating oil cylinder and a cooling module. The cold kiln body is rotatably fixed on the cold kiln base. The rotating oil cylinder is connected to the cold kiln body and is used to drive the cold kiln body to rotate relative to the cold kiln base. The cooling module is fixed on the outer surface of the cold kiln body and is used to cool the cold kiln body.

9. The iron phosphate sintering system according to claim 8, characterized in that: A driving gear is fixed on the output end of the rotating oil cylinder, a rotating gear is sleeved on the outer peripheral surface of the cold kiln furnace body, and the driving gear is meshed with the rotating gear.

10. The iron phosphate sintering system according to claim 8, characterized in that: The cooling module includes a sleeve and a coolant circulation machine. The sleeve is mounted on the outer surface of the cold kiln body. The sleeve is hollow and filled with coolant. The coolant circulation machine is connected to the sleeve through a pipeline to achieve the circulation of coolant between the coolant circulation machine and the sleeve.

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