Efficient thickening device

Abstract

The efficient thickening device comprises a kettle body, a filtrate discharging mechanism and a gas injection mechanism, a closed thickening cavity is formed in the kettle body, a feeding port, a gas inlet and a receding hole are formed in the upper end of the closed thickening cavity, and a discharging port is formed in the lower end of the closed thickening cavity; the filtrate discharge mechanism comprises a collector ring, a plurality of filter bodies and a discharge pipe; and an outlet of the gas injection mechanism is communicated with the gas inlet. The efficient thickening device provided by the invention has the beneficial effects that gas is injected into the thickening cavity through the gas injection mechanism, so that the pressure in the thickening cavity is increased, liquid components in mineral slurry in the thickening cavity enter the annular cavity of the collector ring through the filter body and then are discharged through the discharge pipe, filtration of the liquid components in the mineral slurry is accelerated, and the concentration of the mineral slurry is improved. In addition, the annular structure formed by the filter bodies can guide the mineral slurry, so that the mineral slurry in the kettle body forms forced axial flow, the uniformity of the system is further enhanced, and the thickening efficiency is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of slurry thickening, and in particular to a high-efficiency thickening device. Background Art

[0002] With the rapid development of the new energy industry in recent years, the production capacity and sales volume of domestic lithium battery positive electrodes and their precursor materials have shown a rapid growth trend. Lithium-ion battery positive electrode precursor materials are the core of positive electrode materials and account for the largest part of the cost. They have a significant impact on the performance of positive electrode materials such as element ratio, particle size, density, impurity content, degree of crystallization, and cost. Concentration and solidification play an important role in improving the sphericity, tap density and single-pot production capacity of products.

[0003] The commonly used method to increase the solid content is through a filter concentrator, a device with a microporous filter tube with a large filter area. Its working principle is: the slurry in the reaction process is pumped into the filter concentrator through a pump. Under the action of the pressure difference, the clear liquid in the slurry is discharged through the filter tube, and the concentrated slurry is returned to the reactor to increase the solid particle content (solid content) in the reactor. This method will cause some slurry particles to remain outside the reaction system, resulting in uneven reaction, especially the coated doped materials directly causing some materials to be unable to be coated with related elements, thereby affecting the uniformity and effectiveness of the coating. Another thickener works by relying on the solid particles to sink due to their own gravity, so that the slurry is divided into two parts: the clarified liquid area and the high-concentration slurry area. The mother liquor in the clarified area is extracted to achieve the effect of increasing the reaction solid content and the single-pot production capacity. This method has the problem of poor thickening efficiency and easy extraction of materials. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies, provide a high-efficiency thickening device, and solve the technical problem of low thickening efficiency of the thickener in the prior art.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a high-efficiency thickening device, comprising: The kettle body has a closed dense cavity, the upper end of which is provided with a feed inlet, an air inlet and a clearance hole, and the lower end of which is provided with a discharge port; A filtrate discharge mechanism, the filtrate discharge mechanism comprising a flow ring, a plurality of filter bodies and a discharge pipe, the flow ring being fixed in the thickening chamber, the flow ring being annular, and having a closed annular chamber therein, the flow ring being provided with a plurality of liquid inlets and liquid outlets along the circumferential direction, the filter bodies being arranged vertically and corresponding to the liquid inlets one by one, the upper end of each of the filter bodies being connected to the corresponding liquid inlet, one end of the discharge pipe being connected to the liquid outlet, and the other end of the discharge pipe extending out of the thickening chamber through the give way hole; and, An air injection mechanism, wherein the outlet of the air injection mechanism is communicated with the air inlet.

[0006] In some embodiments, the filter body includes a filter tube and a plug body, the filter tube is made of ceramic or polymer material, microfiltration holes are formed on the tube wall of the filter tube, the upper end of the filter tube is connected to the corresponding liquid inlet, and the plug body is fixed at the lower end of the filter tube.

[0007] In some embodiments, a plurality of the filter tubes form an annular cylindrical structure, the annular cylindrical structure is coaxially arranged with the feed port, and the distance between two adjacent filter tubes is less than a preset distance.

[0008] In some embodiments, a first one-way valve is disposed in the feed port.

[0009] In some embodiments, the first one-way valve includes an articulated seat, a retaining ring, a valve core and an elastic member, the articulated seat and the retaining ring are fixed to the inner wall of the feed port, one end of the valve core is hinged to the articulated seat, the valve core has a first state of rotating to contact with the retaining ring to close the feed port, and a second state of separating from the retaining ring to open the feed port, the two ends of the elastic member are respectively connected to the inner wall of the feed port and the valve core, and are used to drive the valve core to reach the first state.

[0010] In some embodiments, the number of the liquid outlet and the number of the discharge pipes are both two, and the filtrate discharge mechanism further includes a discharge main pipe, which is connected to the upper end of each of the discharge pipes.

[0011] In some embodiments, a flow meter is provided on the discharge main pipe, and a liquid level detection component is also provided on the upper end of the kettle body.

[0012] In some embodiments, the discharge port is provided with a discharge valve.

[0013] In some embodiments, the gas injection mechanism includes an gas injection pump, a gas injection pipe, a second one-way valve and a pressure detection device, one end of the gas injection pipe is connected to the outlet of the gas injection pump, and the other end of the gas injection pipe is connected to the gas inlet, the second one-way valve is arranged at the gas inlet, and the pressure detection device is arranged on the gas injection pipe and is used to detect the air pressure in the gas injection pipe.

[0014] In some embodiments, a mounting hole is provided at the upper end of the kettle body, and a safety valve is installed on the mounting hole.

[0015] Compared with the prior art, the beneficial effects of the high-efficiency thickening device provided by the present invention are as follows: when in use, the mineral slurry to be thickened enters the thickening chamber through the feed port, and the gas injection mechanism injects gas into the thickening chamber through the gas inlet, so that the pressure in the thickening chamber increases, and the mineral slurry is gradually settled and concentrated in the thickening chamber under the action of gravity and gas. Under the pressure of the injected gas, the liquid component in the mineral slurry passes upward through the filter body into the annular cavity of the merge ring, and then is discharged through the discharge pipe, and the thickened material is discharged out of the device through the discharge port. The present invention injects gas into the thickening chamber through the gas injection mechanism to increase the pressure in the thickening chamber, so that the liquid component in the mineral slurry in the thickening chamber enters the annular cavity of the merge ring through the filter body, and then is discharged through the discharge pipe, which accelerates the filtration of the liquid component in the mineral slurry and improves the thickening efficiency. In addition, the annular structure composed of each filter body can guide the mineral slurry, so that the mineral slurry inside the kettle body forms a forced axial flow, thereby enhancing the uniformity of the system and further improving the thickening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a high-efficiency thickening device provided by an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure of the filtrate discharge mechanism; Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the filtrate discharge mechanism; Figure 4 yes Figure 1 A schematic diagram of the structure of the kettle body and the filtrate discharge mechanism; Figure 5 yes Figure 4 A partial enlarged view of the middle area A; Explanation of the accompanying drawings: 1-kettle body, 11-feed port, 12-air inlet, 13-discharge port, 131-discharge valve, 14-first one-way valve, 141-hinge seat, 142-blocking ring, 143-valve core, 144-elastic member, 15-liquid level detection member, 16-safety valve, 2-filtrate discharge mechanism, 21-collecting ring, 22-filter body, 221-filter tube, 222-plug body, 23-discharge pipe, 24-discharge main pipe, 241-flow meter, 3-gas injection mechanism, 31-gas injection pump, 32-gas injection pipe, 33-second one-way valve, 34-pressure detection member, 4-feed pipe. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] In order to solve the technical problem of low thickening efficiency of a thickener, the present invention provides a high-efficiency thickening device capable of improving the thickening efficiency.

[0019] See also Figure 1-Figure 5 , Figure 1 Schematic diagram of the structure of a high-efficiency thickening device in one embodiment of the present invention. The high-efficiency thickening device includes a kettle body 1, a filtrate discharge mechanism 2 and a gas injection mechanism 3.

[0020] The kettle body 1 has a closed dense cavity therein, with a feed port 11, an air inlet 12 and a clearance hole at the upper end, and a discharge port 13 at the lower end. The feed port 11 is connected to a feed pipe 4.

[0021] The filtrate discharge mechanism 2 includes a flow ring 21, a plurality of filter bodies 22 and a discharge pipe 23. The flow ring 21 is fixed in the thickening chamber. The flow ring 21 is annular and has a closed annular chamber therein. The flow ring 21 is circumferentially provided with a plurality of liquid inlets and liquid outlets. The filter bodies 22 are vertically arranged and correspond one to one with the liquid inlets. The upper end of each filter body 22 is connected to the corresponding liquid inlet. One end of the discharge pipe 23 is connected to the liquid outlet, and the other end of the discharge pipe 23 extends out of the thickening chamber through the give way hole.

[0022] The outlet of the gas injection mechanism 3 is communicated with the gas inlet 12 .

[0023] When in use, the mineral slurry to be thickened enters the thickening chamber through the feed port 11, and the gas injection mechanism 3 injects gas into the thickening chamber through the gas inlet 12, so that the pressure in the thickening chamber increases. The mineral slurry is gradually settled and concentrated under the action of gravity and gas in the thickening chamber. Under the pressure of the injected gas, the liquid component in the mineral slurry passes upward through the filter body 22 into the annular cavity of the confluence ring 21, and then is discharged through the discharge pipe 23. The concentrated material is discharged out of the device through the discharge port 13. The present invention injects gas into the thickening chamber through the gas injection mechanism 3 to increase the pressure in the thickening chamber, so that the liquid component in the mineral slurry in the thickening chamber enters the annular cavity of the confluence ring 21 through the filter body 22, and then is discharged through the discharge pipe 23, which accelerates the filtration of the liquid component in the mineral slurry and improves the thickening efficiency. In addition, the annular structure composed of each filter body 22 can guide the mineral slurry, so that the mineral slurry inside the kettle body 1 forms a forced axial flow, thereby enhancing the uniformity of the system and further improving the thickening efficiency.

[0024] It should be noted that the type of gas injected by the gas injection mechanism 3 can be selected as needed. For example, the gas can be air or an inert gas such as nitrogen.

[0025] In one embodiment, see Figure 1-Figure 3The filter body 22 includes a filter tube 221 and a plug body 222. The filter tube 221 is made of ceramic or polymer material. Microfiltration holes are formed on the tube wall of the filter tube 221. The upper end of the filter tube 221 is connected to the corresponding liquid inlet, and the plug body 222 is fixedly arranged at the lower end of the filter tube 221.

[0026] In one embodiment, see Figure 1-Figure 3 , a plurality of the filter tubes 221 form an annular cylindrical structure, the annular cylindrical structure is coaxially arranged with the feed port 11, and the distance between two adjacent filter tubes 221 is less than the preset distance. The filter tubes 221 form an annular cylindrical structure to guide the mineral slurry, so that the mineral slurry inside the kettle body 1 forms a forced axial flow, thereby enhancing the uniformity of the system and further improving the thickening efficiency.

[0027] In one embodiment, see Figure 3-Figure 5 A first one-way valve 14 is provided in the feed port 11 .

[0028] In one embodiment, see Figure 3-Figure 5 The first one-way valve 14 includes an articulated seat 141, a retaining ring 142, a valve core 143 and an elastic member 144. The articulated seat 141 and the retaining ring 142 are fixed to the inner wall of the feed port 11. One end of the valve core 143 is hinged to the articulated seat 141. The valve core 143 has a first state in which it rotates to contact with the retaining ring 142 to close the feed port 11, and a second state in which it is separated from the retaining ring 142 to open the feed port 11. The two ends of the elastic member 144 are respectively connected to the inner wall of the feed port 11 and the valve core 143, and are used to drive the valve core 143 to reach the first state. When there is no material or the material pressure is insufficient to overcome the preload force of the elastic member 144, the valve core 143 remains in close contact with the retaining ring 142, thereby effectively closing the feed port 11 and preventing the material in the thickening chamber from being discharged from the feed port 11. When sufficient pressure is applied to the material (for example, by pumping or other conveying methods) to overcome the preload force of the elastic member 144, the valve core 143 will be pushed open and separated from the retaining ring 142, thereby opening the feed port 11. The material can then smoothly enter the thickening chamber through the opened feed port 11. Once the material pressure decreases or disappears, the preload force of the elastic member 144 will come into play again, driving the valve core 143 back to the position in contact with the retaining ring 142, and re-closing the feed port 11. The first one-way valve 14 plays a key role in flow control and backflow prevention in the high-efficiency thickening device, and its design and application effectively improve the safety and operating efficiency of the system.

[0029] In one embodiment, see Figure 1-Figure 4The number of the liquid outlet and the number of the discharge pipes 23 are both two, and the filtrate discharge mechanism 2 also includes a discharge main pipe 24, which is connected to the upper ends of the discharge pipes 23. When in use, the filtrate in each discharge pipe 23 is gathered into the discharge main pipe 24, and then discharged from the discharge main pipe 24 to the subsequent process for treatment.

[0030] In one embodiment, see Figure 1-Figure 4 A flow meter 241 is provided on the discharge main pipe 24, and a liquid level detection component 15 is also provided on the upper end of the kettle body 1. When in use, the liquid level of the slurry in the kettle body 1 is continuously detected by the liquid level detection component 15. When the liquid level is lower than the preset liquid level, the slurry is pumped into the feed port. When the liquid level is higher than the preset liquid level, the pumping of the slurry is stopped, so that the liquid level of the slurry in the kettle body 1 remains stable. At the same time, the flow rate of the discharged filtrate is monitored in real time by the flow meter 241. When the flow rate of the discharged filtrate is lower than the preset flow rate, the injection pressure of the gas injection mechanism 3 is increased. When the flow rate of the discharged filtrate is higher than the preset flow rate, the injection pressure of the gas injection mechanism 3 is reduced. This flexible adjustment mechanism not only ensures the relative stability of the filtrate discharge rate, but also allows the injection pressure of the gas injection mechanism to be adjusted in time according to actual needs, thereby avoiding the gas injection mechanism from being maintained at the maximum pressure state for a long time, effectively reducing energy consumption.

[0031] In one embodiment, see Figure 1-Figure 4 The discharge port 13 is provided with a discharge valve 131, so as to facilitate the control of the discharge rate of the slurry.

[0032] In one embodiment, see Figure 1 The gas injection mechanism 3 includes a gas injection pump 31, a gas injection pipe 32, a second one-way valve 33 and a pressure detection component 34. One end of the gas injection pipe 32 is connected to the outlet of the gas injection pump 31, and the other end of the gas injection pipe 32 is connected to the gas inlet 12. The second one-way valve 33 is arranged at the gas inlet 12. The pressure detection component 34 is arranged on the gas injection pipe 32 and is used to detect the air pressure in the gas injection pipe 32. The setting of the second one-way valve 33 ensures that the gas can only enter the gas inlet 12 from the gas injection pump 31 through the gas injection pipe 32 in one direction, thereby avoiding the gas in the kettle body 1 from flowing back to the gas injection system, which not only protects the gas injection pump 31 from damage by reverse airflow, but also ensures the continuity and stability of the gas injection process. The pressure detection component 34 can monitor the air pressure in the gas injection pipe 32 in real time, providing key air pressure data for the operator. With this data, the operator can accurately adjust the output of the gas injection pump 31 to achieve the required gas pressure level, thereby achieving fine control over the gas injection process.

[0033] In one embodiment, see Figure 1A mounting hole is provided at the upper end of the kettle body 1, and a safety valve 16 is installed on the mounting hole. When the pressure in the kettle body 1 exceeds the preset pressure, the safety valve 16 opens to release the pressure, thereby ensuring the safe operation of the system. In order to better understand the present invention, the following Figures 1 to 5 The technical solution of the present invention is described in detail: when in use, the mineral slurry to be thickened enters the thickening chamber through the feed port 11, and the gas injection mechanism 3 injects gas into the thickening chamber through the gas inlet 12, so that the pressure in the thickening chamber increases, and the mineral slurry is gradually settled and concentrated in the thickening chamber under the action of gravity and gas. The liquid component in the mineral slurry enters each filter tube 221 under the pressure of the injected gas, and then flows upward into the annular cavity of the merge ring 21, and then is discharged through the discharge pipe 23 and the discharge main pipe 24, and the thickened material is discharged from the device through the discharge port 13. The present invention injects gas into the thickening chamber through the gas injection mechanism 3 to increase the pressure in the thickening chamber, so that the liquid component in the mineral slurry in the thickening chamber enters the annular cavity of the merge ring 21 through the filter body 22, and then is discharged through the discharge pipe 23, thereby accelerating the filtration of the liquid component in the mineral slurry and improving the thickening efficiency. In addition, the annular structure composed of each filter body 22 can guide the mineral slurry, so that the mineral slurry inside the kettle body 1 forms a forced axial flow, thereby enhancing the uniformity of the system and further improving the thickening efficiency.

[0034] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A high-efficiency thickening device, characterized in that: include: The kettle body has a closed dense cavity, the upper end of which is provided with a feed inlet, an air inlet and a clearance hole, and the lower end of which is provided with a discharge port; A filtrate discharge mechanism, the filtrate discharge mechanism comprising a flow ring, a plurality of filter bodies and a discharge pipe, the flow ring being fixed in the thickening chamber, the flow ring being annular, and having a closed annular chamber therein, the flow ring being provided with a plurality of liquid inlets and liquid outlets along the circumferential direction, the filter bodies being arranged vertically and corresponding one to one with the liquid inlets, the upper end of each of the filter bodies being connected to the corresponding liquid inlet, one end of the discharge pipe being connected to the liquid outlet, and the other end of the discharge pipe extending out of the thickening chamber through the give way hole; as well as, An air injection mechanism, wherein the outlet of the air injection mechanism is communicated with the air inlet.

2. The high-efficiency thickening device according to claim 1, characterized in that: The filter body includes a filter tube and a plug body. The filter tube is made of ceramic or polymer material. Microfiltration holes are formed on the tube wall of the filter tube. The upper end of the filter tube is connected to the corresponding liquid inlet. The plug body is fixed at the lower end of the filter tube.

3. The high-efficiency thickening device according to claim 1, characterized in that: A plurality of the filter tubes form an annular cylindrical structure, the annular cylindrical structure is coaxially arranged with the feed port, and the distance between two adjacent filter tubes is less than a preset distance.

4. The high-efficiency thickening device according to claim 1, characterized in that: A first one-way valve is arranged in the feed port.

5. The high-efficiency thickening device according to claim 4, characterized in that: The first one-way valve includes an articulated seat, a retaining ring, a valve core and an elastic member. The articulated seat and the retaining ring are fixed to the inner wall of the feed port. One end of the valve core is hinged to the articulated seat. The valve core has a first state in which it rotates to contact the retaining ring to close the feed port, and a second state in which it is separated from the retaining ring to open the feed port. The two ends of the elastic member are respectively connected to the inner wall of the feed port and the valve core, and are used to drive the valve core to reach the first state.

6. The high-efficiency thickening device according to claim 1, characterized in that: The number of the liquid outlet and the number of the discharge pipes are both two, and the filtrate discharge mechanism further includes a discharge main pipe, which is connected to the upper end of each of the discharge pipes.

7. The high-efficiency thickening device according to claim 6, characterized in that: The discharge main pipe is provided with a flow meter, and the upper end of the kettle body is also provided with a liquid level detection component.

8. The high-efficiency thickening device according to claim 1, characterized in that: The discharge port is provided with a discharge valve.

9. The high-efficiency thickening device according to claim 1, characterized in that: The gas injection mechanism includes an gas injection pump, a gas injection pipe, a second one-way valve and a pressure detection component. One end of the gas injection pipe is connected to the outlet of the gas injection pump, and the other end of the gas injection pipe is connected to the gas inlet. The second one-way valve is arranged at the gas inlet. The pressure detection component is arranged on the gas injection pipe and is used to detect the air pressure in the gas injection pipe.

10. The high-efficiency thickening device according to claim 9, characterized in that: A mounting hole is provided at the upper end of the kettle body, and a safety valve is installed on the mounting hole.

Images