Lithium iron phosphate spray drying device

Abstract

The utility model discloses a lithium iron phosphate spray drying device which comprises a spray drying mechanism and a power supply mechanism, and the spray drying mechanism comprises a drying tower, an atomizer, a material pump, a combustor and an air inlet pipe; the power supply mechanism comprises a kick type temperature controller and a power source, the detection end of the kick type temperature controller is installed on the air inlet pipe, and the power source, the kick type temperature controller and the material pump are connected in series to form a closed loop. The lithium iron phosphate spray drying device provided by the utility model has the beneficial effects that if the temperature of hot air in the air inlet pipe is too high and exceeds the operating temperature of the kick type temperature controller, the kick type temperature controller is switched off, so that the material pump is powered off, and the material pump is prevented from continuously supplying materials to cause that the drying temperature of the materials is too high to influence the quality and even burn the materials; and the stability of the final product quality is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spray dryers, in particular to a lithium iron phosphate spray drying device. Background Art

[0002] Lithium iron phosphate slurry spray drying device is a drying equipment specially used for processing lithium iron phosphate slurry. Its main function is to quickly evaporate the water in the slurry by spray drying to obtain dry lithium iron phosphate products.

[0003] The working principle of the device is as follows: First, the lithium iron phosphate slurry enters the atomizer through the material pump and is dispersed into small droplets under the centrifugal force of the atomizer. Then, these small droplets enter the drying tower and are fully exposed to hot air. During the heat exchange process, the water in the small droplets evaporates rapidly, so that the lithium iron phosphate slurry is dried into products.

[0004] However, for lithium iron phosphate slurry, if the drying temperature exceeds the process requirement, it will greatly affect the quality of the product and even burn the raw materials. The existing spray dryer cannot automatically stop feeding when the hot air temperature exceeds the preset temperature, resulting in a decrease in the quality of the final product. Utility Model Content

[0005] The utility model aims to overcome the above technical deficiencies and propose a lithium iron phosphate spray drying device to solve the technical problem that the existing spray dryer cannot automatically stop feeding when the hot gas temperature exceeds a preset temperature, resulting in a decrease in the quality of the final product.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a lithium iron phosphate spray drying device, comprising:

[0008] A spray drying mechanism, the spray drying mechanism comprising a drying tower, an atomizer, a material pump, a burner and an air inlet pipe, a feed inlet and an air inlet are provided at the upper end of the drying tower, the outlet of the atomizer is connected to the feed inlet, the outlet of the material pump is connected to the inlet of the atomizer, and both ends of the air inlet pipe are connected to the outlet of the material pump and the air inlet respectively; and,

[0009] The power supply mechanism includes a sudden jump thermostat and a power supply. The detection end of the sudden jump thermostat is installed on the air intake pipe. The power supply, the sudden jump thermostat and the material pump are connected in series to form a closed loop.

[0010] In some embodiments, the snap-action thermostat is a normally closed snap-action thermostat.

[0011] In some embodiments, the power supply mechanism further includes a power failure alarm, and the power supply, the sudden jump temperature controller, the power failure alarm and the material pump are connected in series to form a closed loop.

[0012] In some embodiments, the power supply mechanism further includes a manual switch, and the power supply, the sudden jump thermostat, the manual switch, the power failure alarm and the material pump are connected in series to form a closed loop.

[0013] In some embodiments, one end of the power supply is electrically connected to a terminal of the material pump via a first wire, the other terminal of the material pump is electrically connected to one end of the manual switch via a second wire, the other end of the manual switch is electrically connected to one end of the sudden jump thermostat via a third wire, the other end of the sudden jump thermostat is electrically connected to one end of the power off alarm via a fourth wire, and the other end of the power off alarm is electrically connected to the other end of the power supply via a fifth wire.

[0014] In some embodiments, the outlet of the material pump is connected to the inlet of the atomizer via a discharge pipe.

[0015] In some embodiments, a discharge port is provided at the lower end of the drying tower, and a discharge valve is provided at the discharge port.

[0016] In some embodiments, the discharge valve is an electric air shutoff valve.

[0017] In some embodiments, an air outlet is provided at the upper end of the drying tower.

[0018] In some embodiments, the spray drying mechanism further comprises a nozzle, wherein the nozzle is installed at one end of the air inlet pipe away from the burner, the nozzle is located in the drying tower, and the nozzle is threadedly connected to the air inlet pipe.

[0019] Compared with the prior art, the lithium iron phosphate spray drying device provided by the utility model has the following beneficial effects: when in use, the lithium iron phosphate slurry enters the atomizer through the material pump, and is dispersed into small droplets under the action of the atomizer, and then these small droplets enter the drying tower, and at the same time, the hot air generated by the combustion of the burner enters the drying tower through the air intake pipe to dry the small droplets, thereby realizing the spray drying function of the lithium iron phosphate slurry; if the temperature of the hot air in the air intake pipe is too high, exceeding the action temperature of the sudden jump thermostat, the sudden jump thermostat is disconnected, thereby cutting off the power of the material pump, so as to prevent the material pump from continuing to feed the material, causing the material drying temperature to be too high and affecting the quality, or even burning the material, and then the staff can reduce the working power of the burner, and when the temperature of the hot air in the air intake pipe is lower than the action temperature of the sudden jump thermostat, the sudden jump thermostat is closed again, and the material pump continues to transport the material. Therefore, the material pump can be automatically stopped by the device when the air intake temperature is too high, which can prevent the situation that the material drying temperature is too high and affecting the quality, or even burning the material, and greatly improve the stability of the final product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a lithium iron phosphate spray drying device provided by an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the structure of the spray drying mechanism;

[0022] Figure 3 yes Figure 1 A schematic diagram of the structure of the power supply mechanism;

[0023] Explanation of the reference numerals: 1-spray drying mechanism, 11-drying tower, 111-discharge port, 112-discharge valve, 113-air outlet, 12-atomizer, 13-material pump, 14-burner, 15-inlet pipe, 16-discharge pipe, 17-nozzle head, 2-power supply mechanism, 21-sudden temperature controller, 22-power supply, 23-power off alarm, 24-manual switch, 25-first wire, 26-second wire, 27-third wire, 28-fourth wire, 29-fifth wire. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] In order to solve the technical problem that the existing spray dryer cannot automatically stop feeding when the hot gas temperature exceeds the preset temperature, resulting in a decrease in the quality of the final product, the utility model provides a lithium iron phosphate spray drying device that can automatically stop feeding when the hot gas temperature exceeds the preset temperature, thereby ensuring the stability of product quality.

[0026] It should be noted that the lithium iron phosphate spray drying device described in the utility model is used for but not limited to the drying of lithium iron phosphate, etc. For the convenience of explanation, in the utility model, only the lithium iron phosphate spray drying device applied to lithium iron phosphate drying equipment is used as an example for explanation, and the principle of applying the lithium iron phosphate spray drying device to other types of equipment is substantially the same as the principle applied to the lithium iron phosphate drying equipment, which will not be repeated here.

[0027] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of a lithium iron phosphate spray drying device in an embodiment of the utility model. The lithium iron phosphate spray drying device includes a spray drying mechanism 1 and a power supply mechanism 2.

[0028] See also Figure 1-Figure 3 The spray drying mechanism 1 includes a drying tower 11, an atomizer 12, a material pump 13, a burner 14 and an air inlet pipe 15. A feed port and an air inlet are provided at the upper end of the drying tower 11. The outlet of the atomizer 12 is connected to the feed port, the outlet of the material pump 13 is connected to the inlet of the atomizer 12, and both ends of the air inlet pipe 15 are respectively connected to the outlet of the material pump 13 and the air inlet.

[0029] The power supply mechanism 2 is used to supply power to the material pump 13 and automatically cuts off the power when the intake temperature is too high. The power supply mechanism 2 includes a sudden jump thermostat 21 and a power supply 22. The detection end of the sudden jump thermostat 21 is installed on the intake pipe 15. The power supply 22, the sudden jump thermostat 21 and the material pump 13 are connected in series to form a closed loop.

[0030] In the present embodiment, the sudden jump thermostat 21 is directly purchased on the market. The sudden jump thermostat is a kind of thermostat, which mainly utilizes the principle that the disc-shaped bimetallic strip produces instantaneous jump under the action of temperature. Through the action of the mechanism, the contact is quickly moved to achieve the purpose of disconnecting or connecting the circuit. The sudden jump thermostat is a bimetallic strip thermostat with a shell. Common ones such as KSD301 and KSD302 are new products of bimetallic strip thermostats. This thermostat is mainly used as overheat protection for various electric heating products. The sudden jump thermostat has the advantages of high precision, low cost, high reliability, good safety, etc., and can be applied to industrial production, laboratory research, medical equipment and other fields.

[0031] When in use, the lithium iron phosphate slurry enters the atomizer 12 through the material pump 13, and is dispersed into small droplets under the action of the atomizer 12. Then, these small droplets enter the drying tower 11. At the same time, the hot air generated by the combustion of the burner 14 enters the drying tower 11 through the air inlet pipe 15 to dry the small droplets, thereby realizing the spray drying function of the lithium iron phosphate slurry; if the temperature of the hot air in the air inlet pipe 15 is too high and exceeds the operating temperature of the sudden jump thermostat 21, the sudden jump thermostat 21 is disconnected, thereby cutting off the power to the material pump 13 to prevent the material pump 13 from continuing to feed the material, resulting in excessively high material drying temperature affecting the quality, or even burning the material. Then the staff can lower the working power of the burner 14. After the temperature of the hot air in the air inlet pipe 15 is lower than the operating temperature of the sudden jump thermostat 21, the sudden jump thermostat 21 is closed again, and the material pump 13 continues to transport the material. Therefore, the device can automatically stop the material pump 13 when the inlet temperature is too high, which can prevent the material from being dried at too high a temperature and affecting the quality, or even burning the material, thereby greatly improving the stability of the final product quality.

[0032] It should be understood that a blower is connected to the air inlet of the burner 14 , and the blower blows air into the burner 14 . The heated air is discharged from the hot air outlet of the burner 14 and then enters the drying tower 11 through the air inlet pipe 15 .

[0033] In one embodiment, see Figure 1 and Figure 3 The snap-action thermostat 21 is a normally closed snap-action thermostat, and the specific model is: KSD301 50A normally closed 245 degrees, where KSD301 is the model, 50A represents the maximum current, normally closed represents that it is closed under normal conditions, and 245 degrees represents that it will be disconnected when the temperature exceeds 245 degrees. It should be understood that in actual applications, a suitable type of snap-action thermostat can be selected as needed.

[0034] In one embodiment, see Figure 1 and Figure 3, the power supply mechanism 2 also includes a power failure alarm 23, the power supply 22, the sudden jump temperature controller 21, the power failure alarm 23 and the material pump 13 are connected in series to form a closed loop. The power failure alarm is a safety device used to monitor the power supply status and trigger an alarm when the power is off. Its working principle is mainly realized through the power supply circuit, the power supply monitoring circuit, the alarm trigger circuit and the alarm device. When the power supply is normal, the voltage detection circuit will stably output a fixed voltage value; when the power supply is interrupted or the voltage drops below the preset threshold, the alarm trigger circuit will be activated, and then the alarm device, such as a horn, a flashing light or sending an alarm message, will be activated to remind people of the power outage. The power failure alarm has a built-in battery, so it can sound an alarm after a power failure. The power failure alarm 23 can be purchased directly on the market.

[0035] In one embodiment, see Figure 1 and Figure 3 The power supply mechanism 2 further includes a manual switch 24. The power supply 22, the sudden jump thermostat 21, the manual switch 24, the power failure alarm 23 and the material pump 13 are connected in series to form a closed loop. By providing the manual switch 24, the material pump 13 can be manually powered off, so as to facilitate the response to emergencies.

[0036] In one embodiment, see Figure 1 and Figure 3 One end of the power supply 22 is electrically connected to one terminal of the material pump 13 via a first wire 25, the other terminal of the material pump 13 is electrically connected to one end of the manual switch 24 via a second wire 26, the other end of the manual switch 24 is electrically connected to one end of the sudden jump thermostat 21 via a third wire 27, the other end of the sudden jump thermostat 21 is electrically connected to one end of the power off alarm 23 via a fourth wire 28, and the other end of the power off alarm 23 is electrically connected to the other end of the power supply 22 via a fifth wire 29.

[0037] In one embodiment, see Figure 1 and Figure 2 The outlet of the material pump 13 is connected to the inlet of the atomizer 12 via the discharge pipe 16 .

[0038] In one embodiment, see Figure 1 and Figure 2 The lower end of the drying tower 11 is provided with a discharge port 111, and a discharge valve 112 is provided at the discharge port 111. Preferably, the discharge valve 112 is an electric air shutoff.

[0039] In one embodiment, see Figure 1 and Figure 2An air outlet 113 is provided at the upper end of the drying tower 11 to facilitate the discharge of hot air in the drying tower 11 . A filter is provided in the air outlet 113 to prevent powder from being discharged from the air outlet 113 .

[0040] In one embodiment, see Figure 1 and Figure 2 The spray drying mechanism 1 also includes a nozzle 17, which is installed at one end of the air inlet pipe 15 away from the burner 14. The nozzle 17 is located in the drying tower 11, and the nozzle 17 is threadedly connected to the air inlet pipe 15.

[0041] In order to better understand the present invention, the following Figures 1 to 3 The technical scheme of the utility model is described in detail: when in use, the lithium iron phosphate slurry enters the atomizer 12 through the material pump 13, and is dispersed into small droplets under the action of the atomizer 12, and then these small droplets enter the drying tower 11, and at the same time, the hot air generated by the combustion of the burner 14 enters the drying tower 11 through the air inlet pipe 15 to dry the small droplets. The lithium iron phosphate powder formed after drying moves downward under the action of gravity and is discharged from the discharge port 111, thereby realizing the spray drying function of the lithium iron phosphate slurry; if the temperature of the hot air in the air inlet pipe 15 is too high and exceeds the operating temperature of the sudden jump thermostat 21, the sudden jump thermostat 21 is disconnected, thereby cutting off the power to the material pump 13 to prevent the material pump 13 from continuing to feed the material, resulting in excessive drying temperature of the material affecting the quality, or even burning the material. Then the staff can reduce the working power of the burner 14. After the temperature of the hot air in the air inlet pipe 15 is lower than the operating temperature of the sudden jump thermostat 21, the sudden jump thermostat 21 is closed again, and the material pump 13 continues to transport the material. Therefore, the device can automatically stop the material pump 13 when the inlet temperature is too high, which can prevent the material from being dried at too high a temperature and affecting the quality, or even burning the material, thereby greatly improving the stability of the final product quality.

[0042] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A lithium iron phosphate spray drying device, characterized in that: include: A spray drying mechanism, the spray drying mechanism comprising a drying tower, an atomizer, a material pump, a burner and an air inlet pipe, a feed inlet and an air inlet are provided at the upper end of the drying tower, the outlet of the atomizer is connected to the feed inlet, the outlet of the material pump is connected to the inlet of the atomizer, and both ends of the air inlet pipe are connected to the outlet of the material pump and the air inlet respectively; and, The power supply mechanism includes a sudden jump thermostat and a power supply. The detection end of the sudden jump thermostat is installed on the air intake pipe. The power supply, the sudden jump thermostat and the material pump are connected in series to form a closed loop.

2. The lithium iron phosphate spray drying device according to claim 1, characterized in that: The snap-action thermostat is a normally closed snap-action thermostat.

3. The lithium iron phosphate spray drying device according to claim 1, characterized in that: The power supply mechanism also includes a power failure alarm. The power supply, the sudden jump temperature controller, the power failure alarm and the material pump are connected in series to form a closed loop.

4. The lithium iron phosphate spray drying device according to claim 3, characterized in that: The power supply mechanism also includes a manual switch, and the power supply, the sudden jump temperature controller, the manual switch, the power failure alarm and the material pump are connected in series to form a closed loop.

5. The lithium iron phosphate spray drying device according to claim 4, characterized in that: One end of the power supply is electrically connected to a terminal of the material pump via a first wire, the other terminal of the material pump is electrically connected to one end of the manual switch via a second wire, the other end of the manual switch is electrically connected to one end of the sudden jump thermostat via a third wire, the other end of the sudden jump thermostat is electrically connected to one end of the power off alarm via a fourth wire, and the other end of the power off alarm is electrically connected to the other end of the power supply via a fifth wire.

6. The lithium iron phosphate spray drying device according to claim 1, characterized in that: The outlet of the material pump is communicated with the inlet of the atomizer via a discharge pipe.

7. The lithium iron phosphate spray drying device according to claim 1, characterized in that: A discharge port is provided at the lower end of the drying tower, and a discharge valve is provided at the discharge port.

8. The lithium iron phosphate spray drying device according to claim 7, characterized in that: The discharge valve is an electric air shutoff.

9. The lithium iron phosphate spray drying device according to claim 1, characterized in that: An air outlet is provided at the upper end of the drying tower.

10. The lithium iron phosphate spray drying device according to claim 1, characterized in that: The spray drying mechanism also includes an injection head, which is installed at one end of the air inlet pipe away from the burner, is located in the drying tower, and is threadedly connected to the air inlet pipe.

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