Clarification separation tank

Abstract

The utility model provides a clarifying and separating tank. The clarification separation tank comprises a tank body with a tank cavity, a first inlet and a second inlet are formed in one end of the tank body in the length direction, a first outlet and a second outlet are formed in the other end of the tank body in the length direction, and a first filter plate, a second filter plate, a heating device, a first baffle and a second baffle are sequentially arranged in the tank cavity. The first filter plate is arranged close to the first inlet and the second inlet, the first baffle is arranged close to the first outlet, and the second baffle is arranged close to the second outlet. Through a mechanical physical demulsification technology, demulsification, oil removal, clarification and separation of liquid after extraction of the centrifugal separator in the hydrometallurgy process are achieved, and the centrifugal extraction, clarification and separation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydrometallurgical extraction technology, and in particular to a clarification and separation tank suitable for demulsification treatment of post-centrifugal extractor liquid. Background Technology

[0002] Centrifugal extraction separators are a new generation of fast and efficient liquid-liquid extraction and separation equipment. They can realize functions such as liquid-liquid two-phase mixing, extraction, and separation. They are widely used in various fields such as hydrometallurgy, wastewater treatment, and biology. They have advantages such as small flow rate, short residence time, high mass transfer efficiency, and wide adaptability to flow ratio.

[0003] Existing centrifugal extractors are mostly used under conditions of low acidity, low temperature, and high flow ratio, which easily leads to emulsification and entrainment, resulting in incomplete separation of the oil and water phases. High-speed centrifugal extraction also produces an emulsified third phase. Simultaneously, fine impurities or solids such as crystals in the feed solution can deposit in the drum, disrupting the equilibrium interface between the oil and water phases and causing entrainment of both light and heavy phases. All of these phenomena are detrimental to hydrometallurgical extraction processes.

[0004] Currently, demulsification methods include chemical demulsification, biological demulsification, physical demulsification, and combinations of various methods. Chemical demulsification uses chemical agents to alter the properties of the oil-water interface or the film strength to achieve demulsification. This process introduces new chemical reagents, which themselves have a certain degree of toxicity, posing harm to humans and the environment, and increasing the difficulty of subsequent processing. Biological demulsification utilizes microbial cells or surfactants produced by microbial metabolism; however, this method is not compatible with large-scale industrial applications. Physical demulsification uses physical methods to disrupt the oil-water interface film, reducing the stability of the emulsion. Physical demulsification is the most widely used and has attracted much attention due to its good safety and high reliability. Among the more effective physical demulsification methods are ultrasonic demulsification, microwave demulsification, and membrane demulsification.

[0005] Ultrasonic demulsification lacks mature and stable industrial equipment, and the equipment is bulky, expensive, and prone to secondary emulsification. Microwave demulsification is still in the laboratory stage and has not yet entered industrialization; the equipment is expensive, bulky, and generates excessive radiation energy. Membrane demulsification uses membrane materials that are too expensive and easily damaged, resulting in poor economic efficiency, limited processing capacity per unit membrane area, and significant membrane demulsification pollution.

[0006] Therefore, in the process of hydrometallurgical extraction, how to effectively separate the water and oil phases to improve the efficiency of demulsification and clarification separation of the post-centrifugal extractor and product quality, reduce initial equipment investment, and reduce operating costs has been a problem that the industry has been closely concerned about and urgently needs to solve. Utility Model Content

[0007] The purpose of this invention is to provide a clarification and separation tank that can improve the efficiency of centrifugal extraction clarification and separation.

[0008] The technical solution of this utility model is: a clarification and separation tank, including a tank body with a cavity, one end of the tank body along the length direction is provided with a first inlet and a second inlet, the other end of the tank body along the length direction is provided with a first outlet and a second outlet, and a first filter plate, a second filter plate, a heating device, a first baffle and a second baffle are arranged sequentially in the cavity, the first filter plate is arranged near the first inlet and the second inlet, the first baffle is arranged near the first outlet, and the second baffle is arranged near the second outlet.

[0009] In the above scheme, by setting up a first filter plate and a second filter plate, mechanical physical demulsification technology is used to achieve demulsification, oil removal, clarification and separation of the liquid after extraction centrifuge in the hydrometallurgical process; and a heating device is used to ensure that the entire demulsification, clarification and separation process is carried out at a constant temperature, thereby improving the efficiency of centrifugal extraction, clarification and separation.

[0010] Preferably, the first filter plate is a louvered filter plate, and the second filter plate is a grid filter plate.

[0011] Preferably, the first inlet is spaced L1 away from the bottom of the tank, and the second inlet is spaced L2 away from the bottom of the tank, where L1 > L2.

[0012] Preferably, the first baffle is L-shaped, which, together with the groove, forms a first cavity, and the first cavity is connected to the first outlet; the second baffle is L-shaped, which, together with the groove, forms a second cavity, and the second cavity is connected to the second outlet.

[0013] Preferably, the bottom of one side of the first L-shaped baffle has a first gap, and the top of one side of the second L-shaped baffle has a second gap.

[0014] Preferably, the heating device includes a first cover plate disposed on the tank body and a plurality of heating tubes connected to the first cover plate and extending into the tank cavity.

[0015] Preferably, the first and second filter plates are installed at an angle. An angled installation refers to an inclination in the height direction Z to puncture the water and oil films in the downstream liquid of the separation tank, separating the water and oil phases by mechanical overflow.

[0016] Preferably, a plurality of observation ports are provided on one side wall of the tank, and the plurality of observation ports are respectively located between the second inlet and the first filter plate, between the first filter plate and the second filter plate, and between the second filter plate and the heating device.

[0017] Preferably, the inner wall of the tank is provided with a plurality of insert blocks, and the first filter plate and the second filter plate are detachably inserted into the insert blocks at the corresponding positions.

[0018] Preferably, the clarification and separation tank further includes a second cover plate and a plurality of third cover plates covering the tank body, with the first inlet and the second inlet disposed on the second cover plate.

[0019] Compared with related technologies, the beneficial effects of this utility model are as follows:

[0020] I. The clarification and separation tank, by setting a first filter plate and a second filter plate, uses mechanical physical demulsification technology to achieve demulsification, oil removal, clarification and separation of the liquid after extraction centrifuge in hydrometallurgical process; and a heating device ensures that the entire demulsification and clarification separation process is carried out at a constant temperature, thereby improving the efficiency of centrifugal extraction clarification and separation.

[0021] Second, both the first and second filter plates are detachable, making them easy to replace and reducing maintenance; they are also easy to disassemble and reuse.

[0022] Third, the heating device is covered by a cover plate on the tank, making installation and disassembly more convenient;

[0023] IV. Observation ports are set on the side walls of the tank to facilitate observation of the separation inside the tank and to adjust the flow rate or flow rate according to the actual situation. Attached Figure Description

[0024] Figure 1 A schematic diagram of the clarification and separation tank provided by this utility model;

[0025] Figure 2 A schematic diagram of the clarification and separation tank provided by this utility model without the third cover plate;

[0026] Figure 3 For along Figure 2 A schematic diagram of the AA section view and rotation;

[0027] Figure 4 For along Figure 2 A BB cross-section and rotation diagram;

[0028] Figure 5 This is a schematic diagram of the structure of the first filter plate;

[0029] Figure 6 This is a schematic diagram of the second filter plate.

[0030] In the attached diagram: 1. Tank; 11. Observation port; 12. Tank cavity; 13. Insert block; 2. Second cover plate; 21. First inlet; 22. Second inlet; 23. First pipe; 24. Second pipe; 3. First outlet; 4. Second outlet; 5. First filter plate; 6. Second filter plate; 7. Heating device; 71. First cover plate; 72. Heating tube; 8. First baffle; 81. First cavity; 82. First gap; 83. Partition; 84. Third gap; 9. Second baffle; 91. Second cavity; 92. Second gap; 10. Third cover plate. Detailed Implementation

[0031] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0032] like Figure 1 , Figure 2 As shown, the clarification and separation tank provided in this embodiment includes a tank body 1, a second cover plate 2, a first outlet 3, a second outlet 4, a first filter plate 5, a second filter plate 6, a heating device 7, a first baffle 8, a second baffle 9, and a third cover plate 10.

[0033] The tank 1 has a length direction X and a width direction Y, and has an internal cavity 12. The tank 1 can be made of PP or PVC material. A second cover plate 2 is provided at one end of the tank 1 along its length. The second cover plate 2 has a first pipe 23 and a second pipe 24 that can extend into the cavity 12. The bottom of the first pipe 23 forms a first inlet 21 for injecting an oil phase into the cavity 12. There is a gap L1 between the first inlet 21 and the bottom of the tank 1. The bottom of the second pipe 24 forms a second inlet 22 for injecting an aqueous phase into the cavity 12. Figure 3 As shown, there is a gap L2 between the second pipe 24 and the bottom of the tank 1. L1 > L2. Because the aqueous and oil phases from centrifugal extraction produce light and heavy phase entrainment, the separation is incomplete and further demulsification and clarification separation are required in the separation tank. In use, the oil phase separated by centrifugal extraction enters the separation tank through the first inlet 21, and the aqueous phase separated by centrifugal extraction enters the separation tank through the second inlet 22.

[0034] The trough 12 is sequentially equipped with a first filter plate 5, a second filter plate 6, a heating device 7, a first baffle 8, and a second baffle 9. The first filter plate 5 is positioned near the first inlet 21 and the second inlet 22, the first baffle 8 is positioned near the first outlet 3, and the second baffle 9 is positioned near the second outlet 4. There are at least two filter plates. At least two sets of inserts 13 are provided on the inner wall surfaces at both ends of the trough 1 in the width direction Y, with each set of inserts 13 corresponding to one filter plate. Figure 5 , Figure 6 As shown, both ends of the first filter plate 5 and the second filter plate 6 are tapered. The tapered shape facilitates the insertion of the filter plates from top to bottom into the insert block 13 by a pull-out method, achieving detachable installation of the first filter plate 5 and the second filter plate 6. The insert block 13 is positioned on the tank body 1 at an angle according to actual usage requirements, with the angle being an inclination in the height direction Z, and then fixed to the inner wall of the tank body 1 by welding. This allows the first filter plate 5 and the second filter plate 6 to be installed at an angle, which can puncture the water film and oil film in the liquid after centrifugal extractor, and automatically separate the water and oil phases by utilizing the density difference between the two phases.

[0035] like Figure 5 As shown, the first filter plate 5 is a louvered filter plate, such as... Figure 6 As shown, the second filter plate 6 is a wire mesh filter plate.

[0036] like Figure 2 As shown, two glass tubes are installed at the end of the tank 1 away from the inlet along the length X direction. One glass tube forms the first outlet 3, and the other glass tube forms the second outlet 4. The treatment effect of the aqueous phase and oil phase after clarification and separation in the separation tank can be observed through the transparent glass tubes. If the treatment effect is not good, the flow rate of the liquid before the centrifugal extractor should be reduced. If the treatment effect is good, the flow rate of the liquid before the centrifugal extractor can be appropriately increased.

[0037] The heating device 7 includes a first cover plate 71 covering the tank 1 and a plurality of heating tubes 72 connected to the first cover plate 71 and extending into the tank cavity 12. The heating tubes 72 are purchased components and have a U-shaped structure.

[0038] like Figure 2 As shown, the first baffle 8 is L-shaped, and it, together with the groove 1, forms a first cavity 81, which is connected to the first outlet 3. Figure 4 As shown, the L-shaped first baffle 8 has a vertically arranged partition 83 inside, and a third gap 84 is provided at the top of the partition 83. The first outlet 3 is located between the partition 83 and the inner wall of the tank 1. The second baffle 9 is L-shaped, and it and the tank 1 enclose a second cavity 91, which communicates with the second outlet 4. Figure 2 , Figure 4As shown, the bottom of one side of the L-shaped first baffle 8 has a first gap 82, and the top of one side of the L-shaped second baffle 9 has a second gap 92. The clarified and separated aqueous phase enters the first chamber 81 through the first gap 82 at the lower end, then flows downwards through the third gap 84 at the top of the partition 83, exiting the separation tank from the first outlet 3 and entering the storage tank of the next stage for storage and other uses. The separated oil phase enters the second chamber 91 through the second gap 92 and then flows out from the second outlet 4 for back-extraction in the extraction tank.

[0039] like Figure 1 As shown, except for the first cover plate 71 and the second cover plate 2, the other parts of the tank 1 are covered by the third cover plate 10. The top of the first cover plate 71 and the third cover plate 10 are provided with handles to facilitate opening the covers. Pumps are installed at both the front and rear sections of the separation tank to facilitate liquid flow and to adjust the flow rate and velocity of the liquid.

[0040] The tank 1 has multiple observation ports 11 on one side wall. These observation ports 11 are respectively located between the second inlet 22 and the first filter plate 5, between the first filter plate 5 and the second filter plate 6, and between the second filter plate 6 and the heating device 7. Transparent resin is embedded in each observation port 11. The clarification and separation effect is observed through these observation ports 11. If the separation effect is good, the solution flow rate is increased; if the separation effect is poor, the solution flow rate is reduced. The demulsification effect of the filter plates can also be observed at the same time.

[0041] In practical applications, hot-melt welding can be used to ensure smooth and strong welds between the tank bodies. Alternatively, bonding, riveting, or bolting can be used to connect the tank body to the filter plate. All components are shaped and deburred after welding. Example

[0042] The clarification and separation tank is 1000mm wide and 800mm high, with a liquid level of 500mm. Two 100mm diameter inlets are located on one side of the top of the tank, opposite the centrifugal extractor inlets. Clarified and separated aqueous and oil phase outlets are located at the end of the tank, away from the centrifugal extractor inlets, with both outlets having a diameter of 100mm. Overflow ports are located on one side of both outlets, and their height is adjustable. The first filter plate (louvered filter plate) is 960mm long, 20mm wide, and 650mm high. The second filter plate (wire mesh filter plate) is also 960mm long, 20mm wide, and 650mm high, with a screen size of GF1W5.00 / 1.00. The measured clarification and separation time for the centrifugal extractor liquid was 4 minutes, with a phase entrainment of 0.15% and an efficiency of 90%.

[0043] The clarification and separation tank of this invention has a long service life, requires little maintenance, does not introduce new impurities and suspended solids, is pollution-free, has high oil removal efficiency, is simple to operate, and is convenient to operate and maintain. It provides a new method for demulsification and oil removal in hydrometallurgical extraction and is of great significance in promoting technological progress and upgrading in the smelting industry.

[0044] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A clarification and separation tank, characterized in that, The device includes a tank with a cavity. One end of the tank along its length is provided with a first inlet and a second inlet, and the other end of the tank along its length is provided with a first outlet and a second outlet. The cavity is provided with a first filter plate, a second filter plate, a heating device, a first baffle and a second baffle in sequence. The first filter plate is located near the first inlet and the second inlet, the first baffle is located near the first outlet, and the second baffle is located near the second outlet.

2. The clarification and separation tank according to claim 1, characterized in that, The first filter plate is a louvered filter plate, and the second filter plate is a grid filter plate.

3. The clarification and separation tank according to claim 1, characterized in that, The first inlet is spaced L1 away from the bottom of the tank, and the second inlet is spaced L2 away from the bottom of the tank, where L1 > L2.

4. The clarification and separation tank according to claim 1, characterized in that, The first baffle is L-shaped and forms a first cavity with the trough, which is connected to the first outlet; the second baffle is L-shaped and forms a second cavity with the trough, which is connected to the second outlet.

5. The clarification and separation tank according to claim 4, characterized in that, The first baffle of the L-shape has a first gap at the bottom of one side and a second gap at the top of one side of the second baffle of the L-shape.

6. The clarification and separation tank according to claim 1, characterized in that, The heating device includes a first cover plate disposed on the tank body and a plurality of heating tubes connected to the first cover plate and extending into the tank cavity.

7. The clarification and separation tank according to claim 1, characterized in that, The first and second filter plates are installed at an angle.

8. The clarification and separation tank according to claim 1, characterized in that, The tank has multiple observation ports on one side wall, which are respectively located between the second inlet and the first filter plate, between the first filter plate and the second filter plate, and between the second filter plate and the heating device.

9. The clarification and separation tank according to claim 1, characterized in that, The inner wall of the tank is provided with multiple inserts, and the first filter plate and the second filter plate are detachably inserted into the inserts at the corresponding positions.

10. The clarification and separation tank according to claim 1, characterized in that, It also includes a second cover plate and a plurality of third cover plates that cover the groove, with the first inlet and the second inlet disposed on the second cover plate.

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