Extraction equipment for hydrometallurgy

Abstract

The extraction equipment comprises a tower body and a stirring device, an upper inner clarification section, a mixing section, a lower inner clarification section and an outer clarification section are arranged in the tower body, and a solid phase discharge port is formed in the bottom end of the tower body; the upper inner clarification section is connected with the mixing section through an upper inner clarification section grid; the mixing section is connected with the lower inner clarification section through a lower inner clarification section grid; a heavy phase feed port and a light phase main discharge port are formed in the upper inner clarification section; a light phase feeding hole is formed in the lower inner clarifying section; the outer clarification section is arranged between the tower body and the mixing section and is connected with the lower inner clarification section through a mixing and clarification connecting port, and the outer clarification section is provided with a heavy-phase discharge port and a light-phase secondary discharge port; the stirring device comprises a motor and a stirring assembly; the motor is arranged in the middle of the tower body top surface; one end of the stirring assembly is fixedly connected with the motor output shaft, and the other end enters the tower body. According to the utility model, the problems of short two-phase contact time and axial backmixing can be solved, and the mixing and separating effects are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of extraction, and particularly relates to an extraction device for hydrometallurgy. Background Art

[0002] Extraction operation is one of the important unit operations in the chemical separation process. The extraction equipment is mainly divided into two categories: stagewise contact equipment and continuous contact equipment. In the field of hydrometallurgy, the former mainly uses multi-stage mixing tank type extraction tanks, and the latter mainly uses rotary disk columns or sieve plate columns.

[0003] Generally speaking, for liquid-liquid extraction, the mixing chamber structure of the tank type extraction equipment is relatively simple, with strong operability and easy to scale up production. However, the mixing efficiency of the tank type extraction equipment is relatively low, the floor area is too large, and the solid particles generated during the extraction process are easy to form deposits and blockages in the dead zones of the extraction equipment, affecting the normal operation and long-term operation of the extraction equipment; the tower type extraction equipment has high mixing efficiency and a small floor area, and is very suitable for radioactive and easily oxidized materials, and is often used for the separation of compounds such as fine chemicals and pharmaceutical intermediates. However, there are often problems such as axial backmixing, poor adaptability to fluctuations in the viscosity and density difference of the incoming materials, and inability to adapt to solid-phase-containing extraction systems. Among them, the rotary disk extraction tower with higher mass transfer efficiency has the problem of easy wear due to the up and down oscillation of the rotary disk.

[0004] The Chinese utility model patent (publication number: CN207445666U) discloses an extraction tower for waste mineral oil disposal. The invention mainly solves the problem of insufficient mass transfer existing in the existing extraction tower by setting a perforated rotary disk structure with different inclination directions. However, this technical solution cannot solve the problem of solid deposits caused by metals such as calcium, aluminum, and iron during the extraction process in the field of hydrometallurgy; in addition, the sight glasses of the same type of rotary disk extraction tower are often set at the top and bottom of the tower body, which is close to the feeding ports of the two phases. For systems with slow clarification speed, it will interfere with the observation of phenomena and affect the control of production indicators.

[0005] The Chinese invention patent (publication number: CN111701278A) discloses a rotary disk extraction tower and its application. The invention sets a plurality of fixed plate groups misaligned with the rotary disk, effectively achieving the goal of no solid particle deposition. However, this solution does not further consider the problem of easy wear of the rotary disk, and for the production process involving experimental nature, the fluctuations in viscosity and density in different sections may not be adjusted in time, and the specifications of the equipment need to be redesigned according to different sections.

[0006] Therefore, in the design of existing extraction equipment, there are generally problems such as insufficient mass transfer, low mixing efficiency, difficulty in adapting to solid-phase-containing extraction systems, easy wear caused by rotary disk oscillation, and inability to fully adapt to changes in system viscosity and density. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide an extraction device for hydrometallurgy to solve the technical problems raised in the above-mentioned background art.

[0008] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0009] An extraction device for hydrometallurgy includes a tower body and a stirring device. An upper inner clarification section, a mixing section, a lower inner clarification section, and an outer clarification section are provided inside the tower body, and a solid phase discharge port is provided at the bottom end; the upper inner clarification section, the mixing section, and the lower inner clarification section are arranged from top to bottom; the upper inner clarification section and the mixing section are connected by an upper inner clarification section grid; the mixing section and the lower inner clarification section are connected by a lower inner clarification section grid; a heavy phase feed port and a light phase main discharge port are provided on the upper inner clarification section; a light phase feed port is provided on the lower inner clarification section; the outer clarification section is arranged between the tower body and the mixing section and is connected to the lower inner clarification section through a mixing clarification connection port, and a heavy phase discharge port and a light phase secondary discharge port are provided on the outer clarification section; the stirring device includes a motor and a stirring component; the motor is arranged in the middle of the top surface of the tower body, and its output shaft is downward; one end of the stirring component is fixedly connected to the output shaft of the motor, and the other end enters the upper inner clarification section, the mixing section, and the lower inner clarification section inside the tower body.

[0010] Further, the outer clarification section is a cavity or a coil structure wound in several circles in a spiral manner.

[0011] Further, the stirring component includes a main shaft and a disc; the main shaft is arranged vertically, its top end is fixedly connected to the output shaft of the motor, and its bottom end extends downward into the tower body; the disc is fixedly sleeved on the main shaft and is provided with a plurality of discs at intervals along the axial direction of the main shaft.

[0012] Further, through holes are formed in the disc.

[0013] Further, the through holes are inclined.

[0014] Further, the disc is fixedly sleeved on the main shaft in an inclined manner.

[0015] Further, it further includes a secondary shaft; the secondary shaft is arranged vertically and is provided with a plurality of secondary shafts at intervals along the axial direction of the main shaft. There is a certain distance between the secondary shaft and the main shaft, and they are fixedly connected; the disc is fixedly sleeved on the main shaft and the secondary shaft.

[0016] Further, it further includes a fixed arc plate; the back surface of the fixed arc plate is fixedly connected to the inner wall of the mixing section. A plurality of fixed arc plates are arranged at intervals along the circumferential direction of the inner wall of the mixing section as a group, and multiple groups are arranged at intervals along the vertical direction of the inner wall of the mixing section. The fixed arc plates between adjacent groups are arranged in a staggered manner.

[0017] Further, the fixed arc plate and the disc are arranged in a staggered manner.

[0018] Furthermore, the upper inner clarifying section, the lower inner clarifying section and the outer clarifying section are provided with sight glasses.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The utility model uses an inclined disc and a through hole arranged obliquely on the disc, so that when the disc rotates at high speed, the light phase is accelerated due to the upward force, and the heavy phase is weakened due to the upward force, so that the light and heavy phases passing through the through hole have a flow rate difference, which improves the mixing effect. By controlling the inclination angle of the disc and cooperating with the inclined through hole, the flow rate difference can be adjusted, the residence time of the two-phase mixing can be increased, and the light and heavy phases can be fully mixed to adapt to the material and liquid conditions of different sections, which solves the problem of short contact time and axial back mixing of the two phases when the density difference between the light and heavy phases is too large, and improves the mixing and separation effect. At the same time, the rising force provided by the disc can also reduce the dead zone and improve the space utilization rate of the equipment.

[0021] 2. The utility model is provided with fixed arc plates, and a semi-open chamber is formed between adjacent fixed arc plates, so that the two phases can be dispersed and agglomerated in different chambers, further suppressing axial back mixing and enhancing the mixing effect.

[0022] 3. The utility model can reduce the vibration generated when the disc rotates at high speed, reduce losses, and reduce maintenance costs by setting multiple secondary shafts.

[0023] 4. The utility model provides sight glasses on the upper inner clarification section, the lower inner clarification section, and the outer clarification section, so as to facilitate quick and preliminary judgment by color in actual production whether the system is within a controllable target range, whether the phase separation is normal, whether there is any third phase entrainment, and other issues, thereby improving the controllability of the overall process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the disc of the utility model;

[0026] Figure 3 It is a schematic diagram of the top surface structure of the disk of the utility model;

[0027] Figure 4 It is a structural schematic diagram of the through hole of the utility model;

[0028] Figure 5 It is a structural schematic diagram of the fixed arc plate of the utility model;

[0029] In the attached drawings, 1 is the tower body; 101 is the upper inner clarification section; 102 is the mixing section; 103 is the lower inner clarification section; 104 is the outer clarification section; 105 is the grille of the upper inner clarification section; 106 is the grille of the lower inner clarification section; 107 is the heavy-phase feed inlet; 108 is the main light-phase discharge outlet; 109 is the light-phase feed inlet; 110 is the mixing and clarification connection port; 111 is the heavy-phase discharge outlet; 112 is the secondary light-phase discharge outlet; 113 is the solid-phase discharge outlet.

[0030] 2 is the stirring device; 21 is the motor; 22 is the stirring assembly; 221 is the main shaft; 222 is the secondary shaft; 223 is the disc; 224 is the through hole.

[0031] 3 is the fixed arc plate; 4 is the sight glass. Specific embodiments

[0032] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following presents preferred embodiments with reference to the attached drawings and further elaborates on the present utility model in detail. However, it should be noted that many details listed in the specification are only for enabling the reader to have a thorough understanding of one or more aspects of the present utility model, and these aspects of the present utility model can be implemented even without these specific details.

[0033] An extraction device for hydrometallurgy, comprising a tower body 1 and a stirring device 2. Inside the tower body 1, there are an upper internal clarification section 101, a mixing section 102, a lower internal clarification section 103, and an external clarification section 104. At the bottom, there is a solid-phase discharge port 113, which is used for separating impurity solids. The upper internal clarification section 101, the mixing section 102, and the lower internal clarification section 103 are arranged from top to bottom. The upper internal clarification section 101 and the mixing section 102 are connected by an upper internal clarification section grid 105. The mixing section 102 and the lower internal clarification section 103 are connected by a lower internal clarification section grid 106. The upper internal clarification section grid 105 and the lower internal clarification section grid 106 are used for rectification. On the upper internal clarification section 101, there are a heavy-phase feed port 107 and a light-phase main discharge port 108. The heavy-phase feed port 107 is used for heavy-phase feeding, and the light-phase main discharge port 108 is used for discharging the mixed light phase. On the lower internal clarification section 103, there is a light-phase feed port 109, which is used for light-phase feeding. The external clarification section 104 is arranged between the tower body 1 and the mixing section 102. The external clarification section 104 can expand the degree of two-phase separation. The external clarification section 104 is connected to the lower internal clarification section 103 through a mixing and clarification connection port 110. After mixing, the heavy phase enters the external clarification section 104 through the mixing and clarification connection port 110. On the external clarification section 104, there are a heavy-phase discharge port 111 and a light-phase secondary discharge port 112. The heavy-phase discharge port 111 is used for discharging the mixed heavy phase, and the light-phase secondary discharge port 112 is used for discharging the light phase entrained in the mixed heavy phase. The stirring device 2 includes a motor 21 and a stirring assembly 22. The motor 21 is arranged in the middle of the top surface of the tower body 1 through a bracket, and its output shaft faces downward. One end of the stirring assembly 22 is fixedly connected to the output shaft of the motor 21, and the other end enters the upper internal clarification section 101, the mixing section 102, and the lower internal clarification section 103 inside the tower body 1. The motor 21 drives the stirring assembly 22 to rotate, so that the stirring assembly 22 stirs the heavy phase and the light phase inside the tower body 1.

[0034] The external clarification section 104 is a cavity or a coiled pipe structure wound in several turns (not shown in the figure).

[0035] The stirring assembly 22 includes a main shaft 221, a secondary shaft 222, and a disc 223. The main shaft 221 is arranged vertically, its top end is fixedly connected to the output shaft of the motor 21, and its bottom end extends downward into the upper internal clarification section 101, the mixing section 102, and the lower internal clarification section 103 of the tower body 1. The secondary shaft 222 is arranged vertically, and a plurality of secondary shafts 222 are arranged at intervals along the axial direction of the main shaft 221. There is a certain distance between the secondary shaft 222 and the main shaft 221, and they are fixedly connected to each other. The middle parts of the main shaft 221 and the secondary shaft 222 are rotationally connected to the inner wall of the mixing section 102 through a middle fixing bracket, and the bottom is connected to the lower internal clarification section 103 through a bearing. The disc 223 is fixedly sleeved on the main shaft 221 and the secondary shaft 222, and a plurality of discs 223 are arranged at intervals along the axial directions of the main shaft 221 and the secondary shaft 222.

[0036] The described disc 223 is provided with through holes 224, and there are at least two through holes 224. The through holes 224 can enable the light phase to flow faster due to the upward force when the disc 223 rotates at high speed, and the heavy phase to flow slower due to the weakened upward force, so that the light and heavy phases passing through the through holes 224 can obtain a flow velocity difference, which can improve the uniformity of dispersion and make the light and heavy phases fully mixed.

[0037] The described through holes 224 are inclined, so that the light and heavy phases passing through the through holes 224 can further increase the upward flow velocity of the light phase and inhibit the downward flow velocity of the heavy phase due to the inclined structure of the through holes 224, obtaining a larger flow velocity difference and further improving the mixing effect.

[0038] The described disc 223 is fixedly sleeved on the main shaft 221 in an inclined manner, and the inclination angle with the main shaft 221 is between -30° and 30°. By controlling the inclination angle of the disc 223 and cooperating with the inclined through holes 224, the flow velocity difference can be adjusted, the residence time of the two-phase mixing can be increased, the light and heavy phases can be fully mixed and adapted to the liquid conditions in different sections, and at the same time, an upward force can be provided to reduce the dead zone.

[0039] It further includes a secondary shaft 222; the described secondary shaft 222 is vertically arranged and there are multiple secondary shafts 222 spaced along the axial direction of the main shaft 221. There is a certain distance between the secondary shaft 222 and the main shaft 221, and they are fixedly connected; the described disc 223 is fixedly sleeved on the main shaft 221 and the secondary shaft 222. By providing the main shaft 221 and the secondary shaft 222, the vibration generated when the disc 223 rotates at high speed can be reduced.

[0040] It further includes a fixed arc plate 3; the back of the described fixed arc plate 3 is fixedly connected to the inner wall of the mixing section 102. The fixed arc plate 3 is arranged in at least two groups at intervals along the circumferential direction of the inner wall of the mixing section 102, and at least four groups are arranged at intervals along the vertical direction of the inner wall of the mixing section 102. The distance between the back and the arc surface of the fixed arc plate 3 is 1 / 4 to 3 / 4 of the inner diameter of the inner wall of the mixing section 102, and the fixed arc plates 3 in adjacent groups are arranged staggeredly. A semi-open chamber is formed between adjacent fixed arc plates 3 in each group, so that the two phases can complete dispersion and coalescence in different chambers, inhibiting axial backmixing and enhancing the mixing effect.

[0041] The described fixed arc plate 3 and the disc 223 are arranged staggeredly.

[0042] A sight glass 4 is provided on the upper inner clarification section 101, the lower inner clarification section 103, and the outer clarification section 104 for observing the mixing and separation conditions.

[0043] The working mode of the present utility model is as follows:

[0044] Start the motor 21 to drive the main shaft 221 to rotate. The main shaft 221 drives the secondary shaft 222 and the disk 223 to rotate. The heavy phase enters the tower body 1 from the heavy-phase feed inlet 107. After passing through the upper internal clarification section 101, it enters the mixing section 102 through the upper internal clarification section grille 105. The light phase enters the tower body 1 from the light-phase feed inlet 109. After passing through the lower internal clarification section 103, it enters the mixing section 102 through the lower internal clarification section grille 106. The heavy phase and the light phase are fully mixed in the mixing section 102. Under the agitation of the disk 223, the heavy phase and the light phase complete dispersion and coalescence in the chamber formed by the fixed arc plate 3. After mixing, the light phase enters the upper internal clarification section 101 and leaves the tower body 1 from the light-phase main discharge outlet 108. The heavy phase enters the lower internal clarification section 103 and then enters the external clarification section 104 through the mixing and clarification connection port 110. Finally, the heavy phase leaves the tower body 1 from the heavy-phase discharge outlet 111. The light phase entrained in the heavy phase leaves the tower body 1 from the light-phase secondary discharge outlet 112. The impurity solids generated in the mixing section 102 leave the tower body 1 from the solid-phase discharge outlet 113, completing the extraction.

[0045] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An extraction device for hydrometallurgy, comprising a tower body and a stirring device, characterized in that: The tower body is internally provided with an upper internal clarification section, a mixing section, a lower internal clarification section, and an external clarification section, and a solid-phase discharge port is provided at the bottom end; the upper internal clarification section, the mixing section, and the lower internal clarification section are arranged from top to bottom; the upper internal clarification section and the mixing section are connected by an upper internal clarification section grid; the mixing section and the lower internal clarification section are connected by a lower internal clarification section grid; a heavy-phase feed port and a light-phase main discharge port are provided on the upper internal clarification section; a light-phase feed port is provided on the lower internal clarification section; the external clarification section is arranged between the tower body and the mixing section and is connected to the lower internal clarification section through a mixing and clarification connection port, and a heavy-phase discharge port and a light-phase secondary discharge port are provided on the external clarification section; the stirring device includes a motor and a stirring assembly; the motor is arranged in the middle of the top surface of the tower body, and its output shaft faces downward; one end of the stirring assembly is fixedly connected to the output shaft of the motor, and the other end enters the upper internal clarification section, the mixing section, and the lower internal clarification section inside the tower body.

2. The extraction equipment for hydrometallurgy according to claim 1, wherein: The external clarification section is a cavity or a coiled pipe structure spirally wound for several turns.

3. An extraction device for hydrometallurgy according to claim 1, characterized in that: The stirring assembly includes a main shaft and a disc; the main shaft is arranged vertically, its top end is fixedly connected to the output shaft of the motor, and the bottom end extends downward into the tower body; the disc is fixedly sleeved on the main shaft and is provided with a plurality of discs at intervals along the axial direction of the main shaft.

4. An extraction device for hydrometallurgy according to claim 3, characterized in that: Through holes are formed in the disc.

5. An extraction device for hydrometallurgy according to claim 4, characterized in that: The through holes are inclined.

6. An extraction device for hydrometallurgy according to claim 3, characterized in that: The disc is fixedly sleeved on the main shaft obliquely.

7. An extraction device for hydrometallurgy according to claim 6, characterized in that: It further includes a secondary shaft; the secondary shaft is arranged vertically and is provided with a plurality of secondary shafts at intervals along the axial direction of the main shaft. The secondary shaft is spaced from the main shaft by a certain distance and is fixedly connected to the main shaft; the disc is fixedly sleeved on the main shaft and the secondary shaft.

8. The extraction equipment for hydrometallurgy according to claim 2, characterized in that: It further includes a fixed arc plate; the back surface of the fixed arc plate is fixedly connected to the inner wall of the mixing section. A plurality of fixed arc plates are arranged in a group at intervals along the circumferential direction of the inner wall of the mixing section, and multiple groups are arranged at intervals vertically along the inner wall of the mixing section. The fixed arc plates between adjacent groups are staggered.

9. The extraction equipment for hydrometallurgy according to claim 8, characterized in that: The fixed arc plate and the disc are staggered.

10. The extraction equipment for hydrometallurgy according to claim 1, characterized in that: Viewing glasses are provided on the upper internal clarification section, the lower internal clarification section, and the external clarification section.

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