Intelligent batching device for lithium carbonate production

Abstract

The invention provides an intelligent batching device for lithium carbonate production, which comprises a conveying belt, the front end of the conveying belt is connected with a programmable integrated controller PLC, and a lepidolite batching assembly, a sodium sulfate batching assembly, a first auxiliary material assembly, a second auxiliary material assembly and an auxiliary material standby batching assembly are arranged above the conveying belt. In the using process, the metering bin weighing device detects the weight and controls materials to be added into the metering bin, after the set weight is reached, the discharging valve of the metering bin is closed, the discharging valve of the metering bin is opened, the materials are transferred to the main conveying belt and conveyed to the mixing bin to be mixed, and the automatic hydraulic lifting weight calibration device calibrates the metering bin regularly; the metering accuracy is guaranteed, the matching precision can be improved, and the product quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of mixing and batching equipment, and particularly to an intelligent batching device for lithium carbonate production. Background Art

[0002] With the rise of the use of new energy, especially the market demand for new energy vehicles powered by lithium batteries has increased significantly. As the positive electrode raw material for power batteries, lithium carbonate has been in strong demand in recent years. With the development of technology, in order to improve product quality, production efficiency, energy conservation and consumption reduction, various production enterprises are trying different new processes and new technologies. In the front-end mixing process section of lithium carbonate production, since several different raw materials need to be mixed according to a ratio, the current industry generally adopts a relatively crude batching process, and generally adopts a batching mode of dynamic continuous feeding. Some adopt the mode of a metering belt scale, and some adopt the feeding mode of loss-in-weight metering; the production methods used are all relatively traditional, and generally have the following problems: Large batching error: Dynamic metering has the inherent defect of low metering accuracy. Under professional use and maintenance, the batching accuracy can only meet an error of 1%. The current situation is that restricted by the production environment and the technical level of workers, the batching error is generally greater than 1%, and even some are greater than 5%. This seriously affects the product quality and also causes waste of raw materials.

[0003] Low degree of automation: In several formulas, lepidolite accounts for a large proportion, reaching more than 60%. In continuous production, a forklift needs to frequently replenish the storage bin. Equipment failures and blockages at the feeding port often occur, and manual intervention is often required, wasting manpower and material resources. It seriously relies on the experience of on-site workers rather than the guarantee of system equipment.

[0004] Poor formula confidentiality: The formula is the core secret of the company. The feeding of the ratio of each material is not linked and needs to be set one by one separately, without permission management.

[0005] Poor guarantee of accurate batching: Each material belongs to different feeding equipment. Once the batching deviation exceeds the standard and continues to run, it is easy to cause product quality problems. Because it is fed after weighing, whether the weighing system is correct after a period of time has no timely verification device.

[0006] In view of the above situation, the present invention proposes a brand-new solution; an intelligent batching system for the mixing section of the lithium carbonate production line, which solves the above problems by means of centralized control, formula management, system self-calibration, and flow regulation. Summary of the Invention

[0007] The purpose of the present invention is to solve the problems existing in the above background art, and to propose an intelligent batching device for lithium carbonate production.

[0008] To achieve the above object, the present invention adopts the following technical solutions: An intelligent batching device for lithium carbonate production, comprising a conveyor belt, the front end of the conveyor belt is connected with a programmable central controller PLC, and above the conveyor belt, there are arranged a lepidolite batching component, a sodium sulfate batching component, a first auxiliary material component, a second auxiliary material component and an auxiliary material standby batching component.

[0009] Preferably, both the lepidolite batching component and the sodium sulfate batching component are composed of a storage chamber, a level weighing monitor, a fixing frame, a variable-frequency drag conveyor belt device, a metering chamber, a metering chamber weighing module, a bin wall vibration device and a hydraulic lifting weight calibrator; Storage chambers are fixed at both the left and right ends above the conveyor belt, level weighing monitors are fixed on the outer walls of the storage chambers, fixing frames are fixed at the bottoms of the level weighing monitors, variable-frequency drag conveyor belt devices are fixed in the middle and at the lower end of the fixing frames, metering chambers are fixed below the front ends of the fixing frames, metering chamber weighing modules are fixed on the outer walls of the metering chambers, bin wall vibration devices are fixed on the outer walls of the metering chambers, and hydraulic lifting weight calibrators are fixedly connected below the outer walls of the metering chambers.

[0010] Preferably, the two variable-frequency drag conveyor belt devices are respectively arranged between the bottom of the discharge port of the storage chamber and the feed port above the metering chamber, and between the discharge port at the bottom of the metering chamber and above the conveyor belt.

[0011] Preferably, the first auxiliary material component, the second auxiliary material component and the auxiliary material standby batching component are all composed of a storage bin, a level weighing monitoring device, a frame, a variable-frequency star-shaped discharger, a metering bin, a metering bin weighing module, a bin wall vibrator and a hydraulic lifting weight calibration device; Storage bins are fixed in the middle above the conveyor belt, level weighing monitoring devices are fixed on the outer walls of the storage bins, frames are fixed at the bottoms of the level weighing monitoring devices, variable-frequency star-shaped dischargers are fixed below the middle of the storage bins, metering bins are fixed below the middle of the frames, metering bin weighing modules are fixed on the outer walls of the metering bins, bin wall vibrators are fixed on the outer walls of the metering bins, and hydraulic lifting weight calibration devices are fixed at the front ends of the outer walls of the metering bins.

[0012] Preferably, the discharge port at the bottom of the variable-frequency star-shaped discharger is exactly arranged above the middle of the metering bin, and the middle of the discharge port below the metering bin is exactly arranged above the conveyor belt.

[0013] Preferably, the programmable central controller PLC is signal-connected to a material level weighing monitor, a variable-frequency material dragging belt device, a weighing module in the metering chamber, a bin wall vibration device, a hydraulic lifting weight calibrator, a material level weighing monitoring device, a variable-frequency star-shaped discharger, a weighing module in the metering bin, a bin wall vibrator, and a hydraulic lifting weight calibration device.

[0014] The present invention adopts a form of combining multiple batching units, which is centrally controlled by a programmable logic controller PLC. Various material formulas are input on the PLC touch screen. The system automatically calculates the proportioning weight and conveys the materials to the backend mixing bin. It is provided with a lepidolite batching component, a first auxiliary material component, a second auxiliary material component, a spare auxiliary material batching component, a sodium sulfate batching component, and a conveying belt. The weighing device in the metering bin detects the weight and controls the addition of materials to the metering bin. After reaching the set weight, the discharge valve of the storage bin is closed, and the discharge valve of the metering bin is opened to transfer the materials to the conveying belt and then to the mixing bin for mixing. The automatic hydraulic lifting weight calibration device calibrates the metering bin regularly to ensure the accuracy of metering, improve the proportioning accuracy, and guarantee the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure in the present invention; Figure 2 is a schematic diagram of the partial structures of the lepidolite batching component and the sodium sulfate batching component in the present invention; Figure 3 is a schematic diagram of the partial structures of the first auxiliary material component, the second auxiliary material component, and the spare auxiliary material batching component in the present invention; Figure 4 is a schematic diagram of the system architecture in the present invention; Figure 5 is a system control flowchart in the present invention.

[0016] LEGEND DESCRIPTION: Conveying belt 1, programmable central controller PLC 104, lepidolite batching component 101, sodium sulfate batching component 106, storage chamber 201, material level weighing monitor 202, fixing frame 203, variable-frequency material dragging belt device 204, metering chamber 205, weighing module in the metering chamber 206, bin wall vibration device 207, hydraulic lifting weight calibrator 208, first auxiliary material component 102, second auxiliary material component 103, spare auxiliary material batching component 105, storage bin 301, material level weighing monitoring device 302, frame 303, variable-frequency star-shaped discharger 304, metering bin 305, weighing module in the metering bin 306, bin wall vibrator 307, hydraulic lifting weight calibration device 308. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Example 1, referring to Figures 1-5, An intelligent batching device for lithium carbonate production, including a conveyor belt 1. The front end of the conveyor belt 1 is connected to a programmable central controller PLC104. Above the conveyor belt 1, there are a lepidolite batching component 101, a sodium sulfate batching component 106, a first auxiliary material component 102, a second auxiliary material component 103, and an auxiliary material standby batching component 105.

[0018] Both the lepidolite batching component 101 and the sodium sulfate batching component 106 are composed of a storage chamber 201, a level weighing monitor 202, a fixing frame 203, a variable-frequency drag conveyor belt device 204, a metering chamber 205, a metering chamber weighing module 206, a bin wall vibration device 207, and a hydraulic lifting weight calibrator 208. At both the left and right ends above the conveyor belt 1, storage chambers 201 are fixed. On the outer walls of the storage chambers 201, level weighing monitors 202 are fixed. At the bottoms of the level weighing monitors 202, fixing frames 203 are fixed. In the middle and at the lower end of the fixing frames 203, variable-frequency drag conveyor belt devices 204 are fixed. Below the front ends of the fixing frames 203, metering chambers 205 are fixed. On the outer walls of the metering chambers 205, metering chamber weighing modules 206 are fixed. On the outer walls of the metering chambers 205, bin wall vibration devices 207 are fixed. Below the outer walls of the metering chambers 205, hydraulic lifting weight calibrators 208 are fixedly connected.

[0019] The two variable-frequency drag conveyor belt devices 204 are respectively arranged between the bottom of the discharge port of the storage chamber 201 and the feed port above the metering chamber 205, and between the discharge port at the bottom of the metering chamber 205 and above the conveyor belt 1.

[0020] Both the first auxiliary material component 102, the second auxiliary material component 103, and the auxiliary material standby batching component 105 are composed of a storage bin 301, a level weighing monitoring device 302, a frame 303, a variable-frequency star-shaped discharger 304, a metering bin 305, a metering bin weighing module 306, a bin wall vibrator 307, and a hydraulic lifting weight calibration device 308. In the middle above the conveyor belt 1, storage bins 301 are fixed. On the outer walls of the storage bins 301, level weighing monitoring devices 302 are fixed. At the bottoms of the level weighing monitoring devices 302, frames 303 are fixed. Below the middle of the storage bins 301, variable-frequency star-shaped dischargers 304 are fixed. Below the middle of the frames 303, metering bins 305 are fixed. On the outer walls of the metering bins 305, metering bin weighing modules 306 are fixed. On the outer walls of the metering bins 305, bin wall vibrators 307 are fixed. At the front ends of the outer walls of the metering bins 305, hydraulic lifting weight calibration devices 308 are fixed.

[0021] The discharge port at the bottom of the variable-frequency star-shaped discharger 304 is exactly set above the middle of the metering bin 305, and the middle of the discharge port below the metering bin 305 is exactly set above the conveyor belt 1.

[0022] During operation, the weighing module 306 of the metering bin and the weighing module 206 of the metering chamber detect the weight and control the addition of materials to the metering bin 305 and the metering chamber 205. After reaching the set weight, the discharge valves of the storage bin 301 and the storage chamber 201 are closed, and the discharge valves of the metering bin 305 and the metering chamber 205 are opened to transfer the materials to the conveyor belt 1 and then transported to the mixing bin for mixing. The hydraulic lifting weight calibrator 208 and the hydraulic lifting weight calibration device 308 regularly calibrate the metering chamber 205 and the metering bin 305 to ensure the accuracy of metering, improve the mixing ratio accuracy, and guarantee the product quality.

[0023] Example 2 is different from Example 1 in that, as Figures 4-5 , in this embodiment, the programmable central controller PLC104 is signal-connected to the level weighing monitor 202, the variable-frequency drag conveyor belt device 204, the weighing module 206 of the metering chamber, the bin wall vibration device 207, the hydraulic lifting weight calibrator 208, the level weighing monitoring device 302, the variable-frequency star-shaped discharge device 304, the weighing module 306 of the metering bin, the bin wall vibrator 307, and the hydraulic lifting weight calibration device 308; When the batching control system is running, various material-related parameters are set by the upper touch screen. Each bin is equipped with a weighing module, and the weight signal is connected and fed back to the programmable central controller PLC104 through a transmitter. The programmable central controller PLC104 realizes the automatic control of the system. The programmable central controller PLC104 gives a working signal via the frequency converter according to the set relevant material parameters, and finally controls the closing of the discharge by the belt conveyor and the discharge device to achieve the proportioning and feeding of various materials. Combining with the production process requirements, the bin-type static metering batching method is adopted. According to its process and characteristics, the centralized control mode is adopted, with high batching accuracy, centralized control by the upper computer, convenient for changing the ratio at any time. The programmable central controller PLC104 is used to coordinate the working points of the sequential actions. Each weighing instrument can work independently or be controlled by the upper computer. When some of them are not used or malfunction, it is convenient to eliminate them. The standby bin can be started and run at any time in case of a failure. The system can run fully automatically or be switched to manual control.

[0024] The programmable central controller PLC104 sets the ratio on the control interface, enables the administrator privilege to set the formula, and the system enters the automatic operation mode. The discharge valves of the metering chamber 205 and the metering bin 305 are in the closed state to avoid material flow. The discharge valves of the storage chamber 201 and the storage bin 301 feed at high speed, and quickly feed materials into the metering chamber 205 and the metering bin 305 according to 90% of the set formula. When approaching the approximate value, the feeding speed is automatically reduced to medium speed feeding; when reaching 98% of the formula, it is automatically adjusted to low speed to avoid over-allowance in batching; after reaching the preset value, the inlet valves of the metering chamber 205 and the metering bin 305 are closed to stop the feeding; the discharge valves of the metering chamber 205 and the metering bin 305 are opened to discharge the materials in the metering chamber 205 and the metering bin 305, and the materials flow to the next link and are transported to the mixing bin for mixing; the system automatically judges whether the material discharge is normal. If there is material jamming, the vibration device is started to help discharge the materials smoothly; after the materials in the bin are emptied, the discharge valve is closed; the system sends the signal of completed batching to the central control system, and the batch batching is completed, and it is ready to enter the next batch.

[0025] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. An intelligent batching device for lithium carbonate production, comprising a conveyor belt (1), characterized in that: The front end of the conveyor belt (1) is connected to a programmable centralized controller PLC (104), and above the conveyor belt (1) are arranged a lepidolite batching component (101), a sodium sulfate batching component (106), a first auxiliary material component (102), a second auxiliary material component (103) and an auxiliary material standby batching component (105).

2. The intelligent batching device for lithium carbonate production according to claim 1, characterized in that: The lepidolite batching assembly (101) and the sodium sulfate batching assembly (106) are both composed of a storage chamber (201), a material level weighing monitor (202), a fixing frame (203), a variable frequency material dragging belt device (204), a metering chamber (205), a metering chamber weighing module (206), a silo wall vibration device (207), and a hydraulic lifting weight corrector (208); A material storage chamber (201) is fixed to the left and right ends above the conveyor belt (1); a material level weighing monitor (202) is fixed to the outer wall of the material storage chamber (201); a fixing frame (203) is fixed to the bottom of the material level weighing monitor (202); a variable frequency material dragging belt device (204) is fixed to the middle and lower end of the fixing frame (203); a metering chamber (205) is fixed below the front end of the fixing frame (203); a metering chamber weighing module (206) is fixed to the outer wall of the metering chamber (205); a silo wall vibration device (207) is fixed to the outer wall of the metering chamber (205); and a hydraulic lifting weight corrector (208) is fixedly connected to the lower part of the outer wall of the metering chamber (205).

3. The intelligent batching device for lithium carbonate production according to claim 2, characterized in that: The two variable frequency material dragging belt devices (204) are respectively arranged between the bottom of the discharge port of the storage chamber (201) and the feed port above the metering chamber (205), and between the discharge port at the bottom of the metering chamber (205) and the top of the conveying belt (1).

4. The intelligent batching device for lithium carbonate production according to claim 1, characterized in that: The first auxiliary material assembly (102), the second auxiliary material assembly (103) and the auxiliary material standby batching assembly (105) are all composed of a material storage bin (301), a material level weighing monitoring device (302), a frame (303), a variable frequency star discharger (304), a metering bin (305), a metering bin weighing module (306), a bin wall vibrator (307) and a hydraulic lifting weight calibration device (308); A material storage bin (301) is fixed to the middle of the upper part of the conveyor belt (1), a material level weighing monitoring device (302) is fixed to the outer wall of the material storage bin (301), a frame (303) is fixed to the bottom of the material level weighing monitoring device (302), a variable frequency star-shaped discharger (304) is fixed to the lower middle part of the material storage bin (301), a metering bin (305) is fixed to the lower middle part of the frame (303), a metering bin weighing module (306) is fixed to the outer wall of the metering bin (305), a bin wall vibrator (307) is fixed to the outer wall of the metering bin (305), and a hydraulic lifting weight correction device (308) is fixed to the front end of the outer wall of the metering bin (305).

5. The intelligent batching device for lithium carbonate production according to claim 1, characterized in that: The discharge port at the bottom of the variable frequency star discharger (304) is arranged just above the middle of the metering bin (305), and the middle of the discharge port below the metering bin (305) is arranged just above the conveyor belt (1).

6. The intelligent batching device for lithium carbonate production according to claim 2 or 3, characterized in that: The programmable centralized controller PLC (104) is signal-connected to a material level weighing monitor (202), a variable frequency material dragging belt device (204), a metering chamber weighing module (206), a silo wall vibrating device (207), a hydraulic lifting weight corrector (208), a material level weighing monitor (302), a variable frequency star-shaped discharger (304), a metering silo weighing module (306), a silo wall vibrator (307), and a hydraulic lifting weight corrector (308).

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