A box type integrated extraction tank

Abstract

The utility model discloses a kind of box integrated extraction tank, including mixing tank chamber, light phase tank chamber, heavy phase tank chamber and stirring chamber;Light phase tank chamber is set to one side of mixing tank chamber, the light phase tank chamber is used for light phase overflow to mixing tank chamber, heavy phase overflow discharge;Heavy phase tank chamber is set to the other side of mixing tank chamber, the heavy phase tank chamber is used for heavy phase overflow mixing tank chamber, light phase discharge, the flow direction tail end of the light phase tank chamber and the heavy phase tank chamber is communicated with the flow direction head end of the mixing tank chamber, the flow direction tail end of the mixing tank chamber is respectively communicated with the flow direction head end of the light phase tank chamber and the heavy phase tank chamber. The utility model is by telescopic overflow baffle in mixing tank chamber, light phase tank chamber and heavy phase tank chamber's stirring chamber, overflow height is adjusted separately independently, so that it can adapt to wide range of flow fluctuation, ensure that there is sufficient mixing time under any flow, without shutdown can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of extraction tank technology, specifically to a box-type integrated extraction tank. Background Technology

[0002] A standard box-type mixing-clarifying extraction tank typically includes a mixing chamber and a clarifying chamber. In the mixing chamber, a stirring device ensures thorough mixing and mass transfer of the aqueous and organic phases, completing the extraction process. The mixture then flows into the adjacent clarifying chamber, where it separates into two phases based on their density difference. The separated lighter and heavier phases then enter adjacent extraction stages. The mixing and clarifying chambers are usually separated by an overflow baffle. For example, Chinese Patent 201921858623.7 discloses a rare earth extraction tank comprising a tank body composed of multiple box-type units arranged in a series. The tank body includes a communicating mixing chamber and a clarifying chamber, with a stirrer installed in the mixing chamber.

[0003] Currently, the height of overflow baffles is usually fixed and not adjustable. This fixed structure works well under design conditions (i.e., rated flow rate), but in actual industrial production, due to factors such as adjustments in throughput, process optimization, or fluctuations in upstream feed, the operating flow rate of the extraction tank often needs to vary within a certain range. When the throughput increases, the total amount of fluid entering the mixing chamber per unit time increases, and the rate at which the liquid level rises in the mixing chamber increases. This results in a significant reduction in the average residence time of the fluid from entering the mixing chamber to overflowing into the clarification chamber. Insufficient residence time directly leads to inadequate mixing and contact between the two phases, resulting in a decrease in mass transfer efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a box-type integrated extraction tank to solve the technical problem that in the existing technology, when the flow rate of the fixed overflow baffle increases, the fluid residence time is insufficient, resulting in the two phases failing to mix and contact fully and the mass transfer efficiency decreasing.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a box-type integrated extraction tank, comprising: Mixing tank chamber; A light phase tank chamber is located on one side of the mixing tank chamber. The light phase tank chamber is used for light phase overflow to the mixing tank chamber and heavy phase overflow to discharge. A heavy phase tank chamber, located on the other side of the mixing tank chamber, is used for heavy phase overflow from the mixing tank chamber and light phase discharge. The flow tail ends of both the light phase tank chamber and the heavy phase tank chamber are connected to the flow head end of the mixing tank chamber, and the flow tail end of the mixing tank chamber is connected to the flow head ends of both the light phase tank chamber and the heavy phase tank chamber. The mixing chambers are arranged one-to-one at the flow initiation of the mixing tank, light phase tank, and heavy phase tank, and have retractable overflow baffles.

[0006] In some embodiments, the overflow baffle includes a base plate and a telescopic plate, the top of the base plate having a groove, and the telescopic plate being slidably connected to the inner side of the groove.

[0007] In some embodiments, a tank cover is also included, which is installed between the tops of the mixing tank chamber, the light phase tank chamber, and the heavy phase tank chamber.

[0008] In some embodiments, a lifting mechanism is installed outside the mixing chamber, with its movable end connected to the telescopic plate to drive the telescopic plate to rise and fall.

[0009] In some embodiments, a cylinder is slidably connected to the stirring chamber, and the cylinder is connected to the movable end of the lifting mechanism.

[0010] In some embodiments, a cover plate is detachably installed on the top of the cylinder, and a stirring mechanism is installed on the cover plate, with the stirring end of the stirring mechanism inserted downward into the inner side of the stirring chamber.

[0011] In some embodiments, the stirring mechanism includes a drive motor, a rotating shaft assembly, and a stirring paddle. The drive motor is mounted on the cover plate, the rotating shaft assembly is connected to the output shaft of the drive motor, and the stirring paddle is mounted on the outside of the rotating shaft assembly.

[0012] In some embodiments, the rotating shaft assembly includes a drive shaft and a transmission shaft. The drive shaft is connected to the output shaft of the drive motor. A plurality of the stirring paddles are respectively connected to the outer sides of the drive shaft and the transmission shaft. The transmission shaft is rotatably connected to the inner bottom wall of the stirring chamber and is fitted onto the outer side of the drive shaft. A transmission keyway is provided on the inner side of the transmission shaft, and a transmission key body is provided on the outer side of the drive shaft to be inserted into the transmission keyway.

[0013] In some embodiments, the mixing tank, the light phase tank, and the heavy phase tank are each provided with a heavy phase weir and a light phase weir at their flow tail ends, for the overflow of the heavy phase and the overflow of the light phase, respectively.

[0014] In some embodiments, the light phase tank chamber is provided with a light phase inlet end located in the stirring chamber above it, the heavy phase tank chamber is provided with a heavy phase inlet end located in the stirring chamber above it, and the mixing tank chamber is provided with a first inlet and a second inlet located in the stirring chamber above it, which are respectively used to connect the light phase weir of the light phase tank chamber and the heavy phase weir of the heavy phase tank chamber.

[0015] Compared with existing technologies, the box-type integrated extraction tank provided by this utility model allows for independent adjustment of the overflow height through retractable overflow baffles in the mixing chambers of the mixing chamber, light phase chamber, and heavy phase chamber. This enables it to adapt to a wide range of flow fluctuations, ensuring sufficient mixing time at any flow rate. Adjustments can be made without stopping the machine, greatly improving the flexibility and stability of the production process, directly increasing the extraction rate and stage efficiency, and guaranteeing product quality and recovery rate. Attached Figure Description

[0016] Figure 1 This is a top view of the box-type integrated extraction tank provided in this embodiment of the utility model; Figure 2 This is a perspective view of the stirring chamber of the box-type integrated extraction tank provided in this embodiment of the utility model; Figure 3 This is a partial three-dimensional structural diagram of the box-type integrated extraction tank provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the lifting and lowering of the stirring chamber of the box-type integrated extraction tank provided in this embodiment of the utility model; Figure 5 This is a partial three-dimensional view from another perspective of the box-type integrated extraction tank provided in this embodiment of the utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Mixing tank chamber; 101. Heavy phase weir; 102. Light phase weir; 2. Light phase tank chamber; 201. Light phase inlet end; 3. Heavy phase tank chamber; 301. Heavy phase inlet end; 4. Mixing chamber; 401. Shell; 402. Cover plate; 403. First inlet; 404. Second inlet; 5. Overflow baffle; 51. Base plate; 52. Telescopic plate; 6. Slot cover; 7. Lifting mechanism; 8. Stirring mechanism; 81. Drive motor; 82. Rotary shaft assembly; 821. Drive shaft; 822. Transmission shaft; 823. Transmission keyway; 824. Transmission key body; 83. Stirring paddle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] To address the technical problem of insufficient fluid residence time in fixed-structure overflow baffles during increased flow rates in extraction tanks, leading to inadequate mixing and contact between the two phases and decreased mass transfer efficiency, this invention provides a box-type integrated extraction tank. This tank allows for independent adjustment of the overflow height via retractable overflow baffles in the mixing, light phase, and heavy phase tanks. This enables it to adapt to a wide range of flow rate fluctuations, ensuring sufficient mixing time at any flow rate. Adjustment can be made without stopping the process, significantly improving the flexibility and stability of the production process, directly enhancing extraction rate and efficiency, and guaranteeing product quality and recovery rate.

[0020] It should be noted that the box-type integrated extraction tank described in this utility model is used for, but not limited to, precious metal extraction. For ease of explanation, this utility model only uses the box-type integrated extraction tank applied to precious metal extraction as an example. The principle of the box-type integrated extraction tank applied to other types of equipment is essentially the same as that applied to precious metal extraction, and will not be elaborated here.

[0021] Please see Figure 1-5This utility model provides a box-type integrated extraction tank, which includes a mixing chamber 1, a light phase chamber 2, a heavy phase chamber 3, and a stirring chamber 4. The light phase chamber 2 is located on one side of the mixing chamber 1, and is used for the light phase to overflow into the mixing chamber 1 and the heavy phase to overflow out. The heavy phase chamber 3 is located on the other side of the mixing chamber 1, and is used for the heavy phase to overflow into the mixing chamber 1 and the light phase to discharge out. The flow ends of both the light phase chamber 2 and the heavy phase chamber 3 are connected to the mixing chamber 1. The flow-direction inlet of the mixing tank 1 is connected, and the flow-direction outlet of the mixing tank 1 is connected to the flow-direction inlet of the light phase tank 2 and the heavy phase tank 3, respectively, forming a three-stage circulation structure of mixing, light phase separation, and heavy phase separation. The mixing tank 1 is the core reaction zone, completing mass transfer. The light phase tank allows the light phase to overflow back into the mixing tank, while simultaneously discharging the heavy phase as a product or a minority phase, achieving internal circulation of the light phase. The heavy phase tank allows the heavy phase to overflow back into the mixing tank, while simultaneously discharging the light phase as a product or a minority phase. This system achieves internal circulation of the heavy phase, forming an internal circulation loop. After the fluid flows out of the mixing chamber, it undergoes fine phase separation in the light phase and heavy phase tanks, respectively. Most of the unreacted continuous phase is directly returned to the beginning of the mixing chamber. The returned continuous phase still contains unsaturated extractant or unextracted metal ions, which are then mixed with fresh liquid, improving the phase separation efficiency. Compared with the traditional clarification chamber where one area separates two phases, this system is more effective. The stirring chambers 4 are correspondingly located at the flow initiation of the mixing tank 1, light phase tank 2, and heavy phase tank 3, and have retractable overflow baffles 5 for the mixed phase to overflow into the tank for liquid-liquid separation. The retractable overflow baffles 5 in the three stirring chambers can be adjusted independently. Based on the physical properties and flow ratio of the two phases, the liquid level and retention in the mixing tank 1, light phase tank 2, and heavy phase tank 3 can be precisely controlled. The three adjustable points form a system that can be controlled collaboratively, resisting disturbances from the flow rate and maintaining the fluid balance and stable operating interface of the entire internal circulation loop.

[0022] The mixing chamber 1, the light phase chamber 2, and the heavy phase chamber 3 are all equipped with a heavy phase weir 101 and a light phase weir 102 at their flow tail ends, which are used for the overflow of the heavy phase and the overflow of the light phase, respectively. The heavy phase weir 101 allows the heavy phase to enter from the bottom and overflow from the weir opening at the higher point inside, while the light phase weir 102 allows the light phase to overflow directly from the top.

[0023] Furthermore, the light phase tank 2 is provided with a light phase inlet end 201 located on the stirring chamber 4 above it, the heavy phase tank 3 is provided with a heavy phase inlet end 301 located on the stirring chamber 4 above it, and the mixing tank 1 is provided with a first inlet 403 and a second inlet 404 located on the stirring chamber 4 above it, which are respectively used to connect the light phase weir 102 of the light phase tank 2 and the heavy phase weir 101 of the heavy phase tank 3, thereby forming a circulating flow path connected to the mixing tank 1.

[0024] In one embodiment, please refer to Figure 2 In order to enable adjustable overflow, the overflow baffle 5 includes a base plate 51 and a telescopic plate 52. The top of the base plate 51 is provided with a sliding groove, and the telescopic plate 52 is slidably connected to the inner side of the sliding groove. The overflow height position can be adjusted by extending and retracting the telescopic plate 52.

[0025] Furthermore, in order to provide a shield at the top of the extraction tank, a tank cover 6 is also included, which is installed between the tops of the mixing tank chamber 1, the light phase tank chamber 2 and the heavy phase tank chamber 3, mainly shielding the non-stirring area.

[0026] Furthermore, in order to drive the telescopic plate 52 to rise and fall, a lifting mechanism 7 is installed on the outside of the mixing chamber 4, and its movable end is connected to the telescopic plate 52 to drive the telescopic plate 52 to rise and fall.

[0027] It is understood that the lifting mechanism 7 may be a hydraulic push rod or other existing equipment with linear drive action, and is not limited to this.

[0028] Furthermore, in order to shield the top of the mixing chamber during the lifting process, a cylinder 401 is slidably connected inside the mixing chamber 4. The cylinder 401 has three baffles to shield the three sides of the non-overflow side. The cylinder 401 is connected to the movable end of the lifting mechanism 7, thereby forming a three-sided enclosure during lifting. In addition, a vertical baffle is provided on the trough cover 6, located on the overflow side, to shield that side. Together, they form a four-sided enclosure to enclose the mixing chamber area, preventing the mixing chamber from having a large opening during the lifting action and preventing volatile gases from overflowing.

[0029] Furthermore, a cover plate 402 is detachably installed on the top of the cylinder 401, and a stirring mechanism 8 is installed on the cover plate 402. The stirring end of the stirring mechanism 8 is inserted downward into the inner side of the stirring chamber 4. During lifting and lowering, the stirring mechanism 8 can be driven to lift and lower synchronously to avoid interference with the stirring mechanism 8.

[0030] Furthermore, in order to effectively stir the area before and after lifting within a certain length range during stirring, the stirring mechanism 8 includes a drive motor 81, a rotating shaft assembly 82, and a stirring paddle 83. The drive motor 81 is mounted on the cover plate 402, the rotating shaft assembly 82 is connected to the output shaft of the drive motor 81, and the stirring paddle 83 is mounted on the outside of the rotating shaft assembly 82. The drive motor 81 drives the rotating shaft assembly 82 and the stirring paddle 83 to rotate, thereby forming a stirring action.

[0031] The mixing chamber 4 is also equipped with a submerged chamber, through which both the light and heavy phases enter. The submerged chamber has an opening to facilitate the upward mixing of the light and heavy phases during the mixing action.

[0032] Furthermore, in order to synchronously adjust the position of the stirring paddle 83 during the telescopic movement, so that the stirring paddle 83 is evenly distributed vertically within the length range, the rotating shaft assembly 82 includes a drive shaft 821 and a transmission shaft 822. The drive shaft 821 is connected to the output shaft of the drive motor 81. The multiple stirring paddles 83 are respectively connected to the outside of the drive shaft 821 and the transmission shaft 822. The transmission shaft 822 is rotatably connected to the inner bottom wall of the stirring chamber 4, and the transmission shaft 822 is fitted on the outside of the drive shaft 821. A transmission keyway 823 is provided on the inner side of the transmission shaft 822, and a transmission key 824 is provided on the outer side of the drive shaft 821 to be inserted into the transmission keyway 823. During the telescopic movement, the drive shaft 821 can be driven to telescopically extend and retract, thereby synchronously lifting the upper part of the stirring paddle 83 and preventing the stirring paddle 83 from being in a fixed position before and after the lifting and lowering.

[0033] To better understand this utility model, the following is combined with... Figures 1 to 5 The technical solution of this utility model is described in detail as follows: After the fluid flows out of the mixing chamber 1, it undergoes phase separation in the light phase chamber 2 and the heavy phase chamber 3, and most of the unreacted continuous phase is directly returned to the beginning of the mixing chamber, thus forming a cycle. If the flow rate of the light and heavy phases increases, the height of the overflow baffle 5 in the mixing chamber is adjusted to control the mixing time and ensure thorough mixing. Different overflow positions at different heights can be formed between the light phase chamber 2, the heavy phase chamber 3, and the mixing chamber 1, forming a synergistic match to offset the insufficient stirring caused by flow fluctuations and to control the liquid level height.

[0034] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A box-type integrated extraction tank, characterized in that, include: Mixing tank chamber; A light phase tank chamber is located on one side of the mixing tank chamber. The light phase tank chamber is used for light phase overflow to the mixing tank chamber and heavy phase overflow to discharge. A heavy phase tank chamber, located on the other side of the mixing tank chamber, is used for heavy phase overflow from the mixing tank chamber and light phase discharge. The flow tail ends of both the light phase tank chamber and the heavy phase tank chamber are connected to the flow head end of the mixing tank chamber, and the flow tail end of the mixing tank chamber is connected to the flow head ends of both the light phase tank chamber and the heavy phase tank chamber. The mixing chambers are arranged one-to-one at the flow initiation of the mixing tank, light phase tank, and heavy phase tank, and have retractable overflow baffles.

2. The box-type integrated extraction tank according to claim 1, characterized in that, The overflow baffle includes a base plate and a telescopic plate. The top of the base plate is provided with a groove, and the telescopic plate is slidably connected to the inner side of the groove.

3. The box-type integrated extraction tank according to claim 1, characterized in that, It also includes a tank cover, which is installed between the tops of the mixing tank, the light phase tank, and the heavy phase tank.

4. The box-type integrated extraction tank according to claim 2, characterized in that, A lifting mechanism is installed on the outside of the mixing chamber, and its movable end is connected to the telescopic plate to drive the telescopic plate to rise and fall.

5. The box-type integrated extraction tank according to claim 4, characterized in that, A cylinder is slidably connected to the mixing chamber, and the cylinder is connected to the movable end of the lifting mechanism.

6. The box-type integrated extraction tank according to claim 5, characterized in that, The top of the cylinder is detachably fitted with a cover plate, and a stirring mechanism is installed on the cover plate. The stirring end of the stirring mechanism is inserted downward into the inner side of the stirring chamber.

7. The box-type integrated extraction tank according to claim 6, characterized in that, The stirring mechanism includes a drive motor, a rotating shaft assembly, and a stirring paddle. The drive motor is mounted on the cover plate, the rotating shaft assembly is connected to the output shaft of the drive motor, and the stirring paddle is mounted on the outside of the rotating shaft assembly.

8. The box-type integrated extraction tank according to claim 7, characterized in that, The rotating shaft assembly includes a drive shaft and a transmission shaft. The drive shaft is connected to the output shaft of the drive motor. A plurality of the stirring blades are respectively connected to the outside of the drive shaft and the transmission shaft. The transmission shaft is rotatably connected to the inner bottom wall of the stirring chamber and is fitted onto the outside of the drive shaft. A transmission keyway is provided on the inner side of the transmission shaft, and a transmission key body is provided on the outer side of the drive shaft to be inserted into the transmission keyway.

9. The box-type integrated extraction tank according to claim 1, characterized in that, The mixing tank, light phase tank, and heavy phase tank are all equipped with heavy phase weirs and light phase weirs at their flow tail ends, which are used for the overflow of heavy phase and light phase, respectively.

10. The box-type integrated extraction tank according to claim 9, characterized in that, The light phase tank is provided with a light phase inlet end located in the stirring chamber above it, the heavy phase tank is provided with a heavy phase inlet end located in the stirring chamber above it, and the mixing tank is provided with a first inlet and a second inlet located in the stirring chamber above it, which are respectively used to connect the light phase weir of the light phase tank and the heavy phase weir of the heavy phase tank.

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