High-temperature crystallization kettle for preparing high-purity manganese sulfate
By designing a high-temperature crystallization kettle, integrating the nucleation, growth and separation process of manganese sulfate, the problems of long processes, many equipment and small particle size in the existing processes are solved, and efficient manganese sulfate crystal production is achieved.
Patent Information
- Application Number
- CN202420473509.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-12
AI Technical Summary
In the existing manganese sulfate production process, the evaporation and high-temperature crystallization process leads to a long process flow, many equipment, small crystallization particle size, and long-term growth to obtain larger particles, and the crystal quality needs to be improved through layered screening.
Design a high-temperature crystallization kettle, including an elliptical head, cone shell, stirring device, lower baffle, upper baffle, circulation inlet and outlet, external heating heat exchanger to realize nucleation, growth, precipitation and separation of manganese sulfate crystals The integration process and improves crystal purity through the discharging port.
It realizes efficient nucleation, growth and separation of manganese sulfate crystals, adjusts crystal particle size and purity, simplifies the process flow, and improves crystallization effect and equipment efficiency.
Smart Images
Figure CN222238863U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to manganese sulfate production and metallurgical industry, in particular to a high-temperature crystallization kettle for preparing high-purity manganese sulfate. Background Art
[0002] Manganese sulfate is an inorganic salt with reverse solubility. The production of manganese sulfate usually adopts evaporation crystallization or high-temperature crystallization. The process of evaporation plus high-temperature crystallization can improve the yield of manganese sulfate, which is a treatment process that can be promoted and applied. However, since it is evaporation + high-temperature crystallization, the two process sections are combined. Although the crystallization effect and crystal yield are improved, the process flow is long and there are many equipment. The crystal size of manganese sulfate is small, and it takes a long growth time to obtain larger particles; at the same time, only by stratifying and screening the crystals can better crystal quality be obtained. Utility Model Content
[0003] The utility model provides a high-temperature crystallization kettle for preparing high-purity manganese sulfate, which is used to solve the above technical problems.
[0004] The technical solution adopted in this utility model is as follows:
[0005] A high-temperature crystallization kettle for preparing high-purity manganese sulfate comprises a kettle body, which comprises a cylinder, an elliptical head is installed at the upper end of the cylinder, and a cone shell is installed at the lower end; a stirring device is arranged on the elliptical head, and the stirring blades extend into a guide cylinder arranged at the lower part of the cylinder; a lower baffle plate and an upper baffle plate are sequentially installed in the cylinder above the guide cylinder; a crystal formation zone and a crystal stratification zone are formed below the lower baffle plate; a liquid level gauge and a saturated material inlet are arranged on the elliptical head; a circulation inlet and a material outlet II are arranged on the cone shell, and a circulation outlet is arranged on the cylinder between the lower baffle plate and the upper baffle plate; the liquid level gauge is electrically connected to a circulation pump arranged outside the kettle body, and the circulation outlet is communicated with the circulation inlet through the circulation pump and an external heating heat exchanger.
[0006] A clear liquid outlet is arranged on the cylinder above the upper baffle.
[0007] A debris discharge port is arranged on the cylinder above the upper baffle.
[0008] The lower baffle plate and the upper baffle plate are both downwardly angled at 5 to 30 degrees.
[0009] The stirring device comprises a reducer, a motor, a stirring shaft and a stirring blade; the reducer and the motor are mounted on a frame, the output shaft of the reducer is connected to the stirring shaft, and the stirring blade is mounted on the end of the stirring shaft; an intermediate bearing is mounted in the middle of the stirring shaft, and the stirring shaft is connected to the elliptical head seal through a mounting flange and a seal.
[0010] The seal is a mechanical seal or a magnetic seal.
[0011] The blades are of paddle-type structure.
[0012] A pressurization interface and a pressure relief device are arranged on the kettle body.
[0013] A sight glass is arranged 500 mm above the upper baffle.
[0014] The utility model can integrate the nucleation, growth, precipitation and separation process of manganese sulfate crystals. The external heating heat exchanger, stirring system, impurity removal system and other auxiliary functions are arranged outside the high-temperature crystallization kettle, which can realize the adjustment of material crystallization temperature, crystal particle size and crystal grading and stratification functions; by setting the impurity removal port, the purity of manganese sulfate crystals can be improved. Through the circulation inlet, two stirring types are realized in one device, and multi-mode operation can be used.
[0015] The utility model is applicable to an operating temperature of 100-180°C, the crystallization operating temperature is adjusted by an external heater, the high-temperature crystallization kettle operating pressure is 0.1-1.0Mpa, and it belongs to a belt-type pressure vessel and is regulated by the container regulations. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the stirring device of the present utility model. DETAILED DESCRIPTION
[0018] The principle and effect of the utility model are described below in conjunction with the accompanying drawings and specific implementations.
[0019] Reference Figure 1 A high-temperature crystallization kettle for preparing high-purity manganese sulfate comprises a kettle body, which comprises a cylinder 3, an elliptical head 9 is installed at the upper end of the cylinder 3, and a conical shell 1 is installed at the lower end; a stirring device 10 is arranged on the elliptical head 9, and stirring blades 10-8 extend into a guide tube 4 arranged at the lower part of the cylinder 3, and the guide tube 4 is welded to the inner wall of the cylinder 3 by a support 2; a lower baffle 5 and an upper baffle 7 are successively installed in the cylinder 3 above the guide tube 4; a crystal formation area and a crystal stratification area are formed below the lower baffle 5; a liquid level gauge LT1 and a saturated material inlet N1 are arranged on the elliptical head 9; the pipes of the saturated material inlet N1 and the liquid level gauge LT1 pass through the head wall, are inserted into the inner cavity, and are fixed by reinforcement. A circulation inlet N3 and a material outlet II N2 are provided on the cone shell 1. To ensure that the amount of discharged crystals is minimal, a circulation outlet N5 is provided on the cylinder 3 between the lower baffle 5 and the upper baffle 7. The liquid level meter LT1 is electrically connected to a circulation pump disposed outside the kettle body, and the circulation outlet N5 is connected to the circulation inlet N3 through the circulation pump and an external heating heat exchanger.
[0020] The settings of the circulation inlet and outlet N3 and N5 allow the upper clear liquid in the kettle to be pumped out to the circulation pump and then enter the external heater. The heated high-temperature material returns to the crystallizer through the circulation inlet N3 at the bottom of the crystallizer. The crystallization temperature of the crystallizer can be adjusted by the external heater, and the crystals can be layered and screened by the circulating material, which plays the role of adjusting the crystal size. The circulation outlet N5 fully controls the crystal content of the solution involved in the external heating circulation.
[0021] Reference Figure 1 A clear liquid outlet N61 is provided on the cylinder 3 above the upper baffle 7. The saturated material transported by the front evaporation system or preheating system enters the high-temperature crystallization kettle. Since the manganese sulfate medium belongs to an inverse solubility inorganic salt, the solubility decreases with the increase of temperature. The saturation point is reached in the high-temperature crystallization kettle and crystals are precipitated. The clear liquid on the top of the high-temperature crystallization kettle returns to the front evaporation section or dissolution section through the clear liquid outlet N61 until the material reaches saturation again and then enters the high-temperature crystallization kettle again to repeat the above purification and crystallization process.
[0022] Reference Figure 1 A discharge port N8 is provided on the cylinder 3 above the upper baffle 7. At high temperature, manganese sulfate crystals are saturated and precipitated, and other impurities in the solution may be dissolved into the mother liquor. By discharging part of the mother liquor, the accumulation of impurities in the crystallizer can be effectively avoided, thereby improving the purity of the manganese sulfate crystals.
[0023] The lower baffle 5 and the upper baffle 7 are both at an angle of 5 to 30 degrees downwards. According to the different flow directions in the crystallizer, the solid crystals are effectively blocked from flowing upwards and being extracted again, and at the same time, the separation of the solid crystals and the mother liquor is facilitated.
[0024] Reference Figure 2 The stirring device 10 includes a reducer 10-4, a motor 10-5, a stirring shaft 10-7 and a stirring blade 10-8; the reducer 10-4 and the motor 10-5 are installed on the frame 10-3, the output shaft of the reducer 10-4 is connected to the stirring shaft 10-7, and the stirring blade 10-8 is installed at the end of the stirring shaft 10-7; an intermediate bearing 10-6 is installed in the middle of the stirring shaft 10-7, and the intermediate bearing 10-6 is used to fix the stirring shaft 10-7 to prevent the stirring shaft 10-7 from being affected by the rotation of the blade 10-8. The stirring shaft 10-7 is sealed and connected to the elliptical head 9 through the mounting flange 10-1 and the seal 10-2.
[0025] According to different operating pressures, the seal 10-2 adopts mechanical seal or magnetic seal.
[0026] The paddle blade 10-8 is of paddle-type structure, which, in combination with the guide tube, can effectively reduce the operating power of the equipment.
[0027] The high temperature crystallization kettle is provided with a pressurization interface and a pressure relief device 11, and nitrogen or other inert gas is introduced through the pressure interface to increase the pressure of the crystallizer to ensure the crystallization temperature of the system. At the same time, the crystallizer is provided with a high pressure relief protection device.
[0028] A sight glass E1 / E2 is provided about 500 mm above the upper baffle 7 (depending on the liquid level) for observing the liquid level and a cleaning port C2 / C3 is provided to clean the sight glass E1 / E2.
[0029] In order to fully consider the requirements of corrosion, temperature and pressure of manganese sulfate solution, the main body of the crystallization kettle is made of 2507 and SMO254 materials.
[0030] Reference Figure 1 A lifting lug 8 is provided on the upper part of the cylinder 3 for lifting the equipment, and a support 6 is provided for on-site installation of the equipment. A liquid level gauge cleaning port C1, a manhole M1 and a safety valve N7 are also provided on the elliptical head 9. A material outlet ⅠN4 is provided at the lower part of the cylinder 3. An overflow port N62 is provided on the cylinder 3 above the upper baffle 7, and a material outlet ⅡN2 is also provided on the cone shell 1.
[0031] The working principle of the utility model is as follows:
[0032] The high-temperature crystallization kettle is arranged after the evaporation section or the crystallization preheating section. The saturated material transported by the previous evaporation section or preheating section enters the high-temperature crystallization kettle through the saturated material inlet N1. When the liquid level reaches the liquid level set by the liquid level gauge LT1, the external circulation pump is turned on, and the material in the kettle enters the external heating heat exchanger through the circulation outlet N5, and enters the kettle through the circulation inlet N3 after reaching the design temperature. In this process, the material is pushed by the circulation pump to stir and flow upward, and the paddle 10-8 pushes the material downward. The material flows downward through the guiding effect of the guide tube 4 and flows upward along the outer wall of the guide tube 4 after leaving the lower edge of the guide tube 4; the paddle 10-8 and the circulation inlet N3 can double-act to adjust the sedimentation and stratification of the crystallizer, and adjust the crystal particle size and crystal yield. Specifically, the two stirring types can be combined into single opening and double opening according to actual working conditions.
[0033] The above-mentioned embodiments of the utility model are for inspiration, but they do not limit the implementation mode and protection scope of the utility model. For those skilled in the art, various changes and modifications can be made without departing from the technical idea of the utility model, and all of them should be included in the protection scope of the utility model. Moreover, the technical scope of the utility model is not limited to the contents in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A high-temperature crystallization kettle for preparing high-purity manganese sulfate, comprising a kettle body, characterized in that: The kettle body comprises a cylinder (3), an elliptical seal (9) is installed at the upper end of the cylinder (3), and a conical shell (1) is installed at the lower end; a stirring device (10) is arranged on the elliptical seal (9), and a stirring blade (10-8) extends into a guide tube (4) arranged at the lower part of the cylinder (3); a lower baffle (5) and an upper baffle (7) are sequentially installed in the cylinder (3) above the guide tube (4); a crystal formation zone and a crystal stratification zone are formed below the lower baffle (5); a liquid level gauge (LT1) and a saturated material inlet (N1) are arranged on the elliptical seal (9); a circulation inlet (N3) and a material outlet II (N2) are arranged on the conical shell (1), and a circulation outlet (N5) is arranged on the cylinder (3) between the lower baffle (5) and the upper baffle (7); the liquid level gauge (LT1) is electrically connected to a circulation pump arranged outside the kettle body, and the circulation outlet (N5) is connected to the circulation inlet (N3) through the circulation pump and an external heating heat exchanger.
2. A high temperature crystallization kettle for preparing high purity manganese sulfate according to claim 1, characterized in that: A clear liquid outlet (N61) is provided on the cylinder (3) above the upper baffle (7).
3. A high temperature crystallization kettle for preparing high purity manganese sulfate according to claim 1, characterized in that: A debris discharge port (N8) is provided on the cylinder (3) above the upper baffle (7).
4. A high-temperature crystallization kettle for preparing high-purity manganese sulfate according to claim 1, characterized in that: The lower baffle plate (5) and the upper baffle plate (7) are both angled downwards at 5 to 30 degrees.
5. A high temperature crystallization kettle for preparing high purity manganese sulfate according to claim 1, characterized in that: The stirring device (10) comprises a reducer (10-4), a motor (10-5), a stirring shaft (10-7) and a stirring blade (10-8); the reducer (10-4) and the motor (10-5) are mounted on a frame (10-3); the output shaft of the reducer (10-4) is connected to the stirring shaft (10-7); the stirring blade (10-8) is mounted on the end of the stirring shaft (10-7); an intermediate bearing (10-6) is mounted in the middle of the stirring shaft (10-7); the stirring shaft (10-7) is sealed and connected via a mounting flange (10-1) and a seal (10-2) and an elliptical head (9).
6. A high-temperature crystallization kettle for preparing high-purity manganese sulfate as claimed in claim 5, characterized in that: The seal (10-2) is a mechanical seal or a magnetic seal.
7. A high-temperature crystallization kettle for preparing high-purity manganese sulfate as claimed in claim 5, characterized in that: The blade (10-8) is of a paddle-type structure.
8. A high-temperature crystallization kettle for preparing high-purity manganese sulfate according to claim 1, characterized in that: A pressurizing interface and a pressure relief device (11) are provided on the kettle body.
9. A high-temperature crystallization kettle for preparing high-purity manganese sulfate according to claim 1, characterized in that: A sight glass is arranged 500 mm above the upper baffle (7).