Mixing and clarifying device capable of rapidly splitting phases

Abstract

The utility model provides a rapid phase-splitting mixing and clarifying device. The mixing and clarifying device comprises a mixing chamber and a phase-splitting clarifying chamber, a mixed liquid outflow buffer chamber communicated with the mixing chamber is arranged on one side of the upper part of the mixing chamber; a bottom outlet of the mixed liquid outflow buffer chamber is communicated with a middle inlet of the split-phase clarifying chamber; splitter plates are respectively arranged on the upper side and the lower side of the middle inlet in the split-phase clarifying chamber; a heavy phase outflow chamber is arranged on one side of the upper part of the split-phase clarifying chamber; one side of the lower part of the split-phase clarifying chamber is communicated with the bottom of the heavy-phase outflow chamber through a heavy-phase flow guide pipe, the tail end of the heavy-phase flow guide pipe is positioned in the heavy-phase outflow chamber, and a liquid level adjusting pipe sleeves the outer side of the tail end of the heavy-phase flow guide pipe. The mixing and clarifying device provided by the utility model can accelerate the mixing and phase splitting speed, so that the liquid holdup per unit volume of equipment is improved, the efficiency of the equipment is improved, the equipment investment and the medicament cost are reduced, and multi-stage connection is convenient to realize.

Description

Technical Field

[0001] The utility model relates to the technical field of mixing-clarification separation and extraction, in particular to a rapid phase separation mixing and clarification device. Background Art

[0002] In the fields of hydrometallurgy and chemical industry, two-phase mixing is often used to clarify, separate and extract the required substances, or to extract and remove impurities to purify the required substances. The main commonly used technology is immiscible liquid-liquid two-phase extraction.

[0003] At present, commonly used extraction equipment includes mixing-settling tanks, extraction towers, centrifugal extractors, etc., and it is very important to select appropriate equipment and devices according to different process characteristics. Among them, the mixing-settling tank is a commonly used device for liquid-liquid extraction. Generally, two immiscible liquid phases are fully mixed by stirring in a mixing chamber, so that the substance to be distributed is distributed in the two phases. The mixed two phases are introduced into the clarification chamber. Under the action of gravity, the two phases with different specific gravities are separated. This device has the advantages of good mixing effect, simple operation, small fixed investment, flexible modification and large processing capacity. It is the mainstream equipment for liquid-liquid extraction in the field of hydrometallurgy. However, the mixing-settling tank also has defects such as poor sealing, large floor space, slow phase separation (especially for systems with small specific gravity difference and weak surface tension between the two phases), and large reagent consumption. Therefore, for some situations where sealing protection is required, reagent prices are high, and plant space is insufficient, equipment such as extraction towers and even centrifugal extractors are often used. However, equipment such as extraction towers and centrifugal extractors have serious defects such as poor mixing effect, inflexible operation, complex equipment, and large investment.

[0004] Therefore, it is of great significance to provide a mixing and clarification device with the advantages of high mixing effect, fast phase separation speed, high extraction rate, small reagent usage, simple operation, small footprint and low equipment investment cost, which is especially suitable for liquid-liquid two-phase extraction in the field of hydrometallurgy. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a mixing and settling device with rapid phase separation, which can accelerate the mixing and settling speed, thereby increasing the liquid holding capacity per unit volume of the equipment, improving equipment efficiency, reducing equipment investment and reagent costs, and facilitating multi-stage connection.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a rapid phase separation mixing and clarifying device, which comprises a mixing chamber and a phase separation and clarifying chamber;

[0008] A mixed liquid outflow buffer chamber in communication with the mixing chamber is provided on one side of the upper portion of the mixing chamber;

[0009] The bottom outlet of the mixed liquid flowing out of the buffer chamber is communicated with the middle inlet of the phase separation clarification chamber;

[0010] Diverter plates are respectively provided on the upper and lower sides of the middle inlet of the phase separation clarification chamber;

[0011] A heavy phase outflow chamber is provided on one side of the upper portion of the phase separation and clarification chamber;

[0012] The lower side of the phase separation and clarification chamber is connected to the bottom of the heavy phase outflow chamber through a heavy phase guide pipe. The end of the heavy phase guide pipe is located in the heavy phase outflow chamber, and a liquid level regulating pipe is sleeved on the outer side of the end.

[0013] The mixing and settling device provided by the present invention, on the one hand, can accelerate the phase separation speed after mixing and increase the liquid holding capacity per unit volume compared to traditional mixing and settling tanks by providing independent and separate mixing chambers and phase separation and settling chambers. Compared to traditional extraction towers and centrifugal extractors, it has the characteristics of flexible operation, convenient multi-stage connection, and low equipment investment and maintenance costs. On the other hand, the mixing and settling device provided by the present invention is configured to flow into the middle of the phase separation and settling chamber. Under the action of density difference, the heavy phase and light phase are naturally separated, the heavy phase sinks and the light phase rises, and the gravity difference between the two phases is fully utilized, thereby greatly improving the two-phase separation effect. In traditional extraction tanks, the mixed liquid flows into the settling chamber from the top or flows into the settling chamber from the bottom through a partition, and the phase separation is carried out through a long process. The utilization rate of the gravity difference between the two phases is low, and the phase separation is slow. The mixing and settling device provided by the present invention injects the liquid phase from the middle of the phase separation and settling chamber and provides diverter plates on both sides of the middle inlet, which can effectively prevent the turbulence of the liquid and accelerate the phase separation speed. Furthermore, the mixing and clarifying device provided by the present invention can be equipped with porous hydrophilic and oleophilic membranes on the diverter plate to further accelerate phase separation. Therefore, the mixing and clarifying device provided by the present invention can reduce the liquid holdup of the device, improve the device efficiency, and significantly reduce the volume of traditional clarifying tanks, thereby significantly reducing the equipment and reagent costs.

[0014] In the utility model, the bottom outlet of the mixed liquid flowing out of the buffer chamber is communicated with the middle inlet of the phase separation and clarification chamber through the mixed liquid guide pipe.

[0015] Preferably, the bottom inlet of the mixing chamber is communicated with the light phase inlet and the heavy phase inlet respectively.

[0016] Preferably, a heavy phase outlet is provided on a lower side of the heavy phase outflow chamber; and a light phase outlet is provided on an upper side of the phase separation and clarification chamber.

[0017] In the mixing and clarifying device provided by the present invention, the positions of the heavy phase outlet and the light phase outlet are specifically designed, which is conducive to the connection of the multi-stage mixing and clarifying device, that is, the heavy phase outlet of the current stage is conveniently connected to the bottom inlet of the mixing chamber of the next stage, and the light phase outlet of the current stage is conveniently connected to the bottom inlet of the mixing chamber of the next stage.

[0018] Preferably, a first heavy phase drain port and a second heavy phase drain port are provided at the lower part of the phase separation clarification chamber; the first heavy phase drain port is connected to the bottom of the heavy phase outflow chamber through a heavy phase guide pipe; the second heavy phase drain port is connected to the bottom inlet of the mixing chamber through a reflux conduit.

[0019] In the present invention, the extraction effect can be further improved by providing a second heavy phase discharge port that is connected to the bottom inlet of the mixing chamber via a reflux conduit.

[0020] Preferably, the mixing chamber is cylindrical in shape; a stirring device is provided in the mixing chamber.

[0021] In the present invention, by preferably designing the mixing chamber to be cylindrical in shape and arranging a stirring device in the mixing chamber, the mixing effect and efficiency of the light phase and the heavy phase in the mixing chamber can be further improved.

[0022] Preferably, diversion holes are evenly arranged on the diversion plate.

[0023] Preferably, the aperture of the diversion hole is 10-100 mm, for example, it can be 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm or 100 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0024] Preferably, a hydrophilic membrane layer or a hydrophobic membrane layer is provided on the upper surface of the diverter plate; and the hydrophilic membrane layer or the hydrophobic membrane layer is a porous structure.

[0025] In the present invention, by providing a hydrophilic membrane layer or a hydrophobic membrane layer on the upper surface of the diverter plate, the separation of the two phases can be promoted, the separation efficiency of the light phase and the heavy phase can be improved, and the phase separation time can be shortened. Generally, the provision of a hydrophobic membrane layer is preferred. In the present invention, the material of the hydrophobic membrane layer is generally selected from hydrophobic membranes commonly used in the art, such as a polypropylene membrane layer; the material of the hydrophilic membrane layer is generally selected from hydrophilic membranes commonly used in the art, such as a polyurethane resin membrane layer, a polyvinylidene fluoride membrane layer, or a polyethylene terephthalate membrane layer.

[0026] Preferably, the pore size of the hydrophilic membrane layer or the hydrophobic membrane layer is 0.1-1 mm, for example, it can be 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm or 1 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0027] Preferably, the liquid level regulating tube is threadedly connected or plug-in connected to the end of the heavy phase flow guide tube. The liquid level regulating tube is generally provided with a concave flow limiting structure above the end.

[0028] In the present invention, the liquid level regulating pipe can adjust the height of the phase separation interface between the heavy phase and the light phase in the phase separation clarification chamber so that it is located in the middle of the phase separation clarification chamber and between two adjacent diverter plates, thereby further improving the separation effect.

[0029] In this utility model, the principle of the liquid level regulating tube is the same as that of the phase splitting regulator. According to the pressure balance principle, the static pressure of the heavy phase flowing out of the chamber is equal to the sum of the pressures of the light phase and the heavy phase in the phase splitting clarification chamber. Since the static pressure of the liquid is proportional to the height and density, it conforms to the formula h 流出室 ×ρ 重相 =h 轻相 ×ρ 轻相 +h 重相 ×ρ 重相 ;h 流出室 Indicates the liquid level height of the heavy phase flowing out of the chamber, ρ 重相 represents the density of the heavy phase, h 轻相 and h 重相 They represent the height of the light phase and heavy phase in the phase separation clarifier, ρ 轻相 Indicates the density of the light phase. Therefore, in the present invention, when the liquid level regulating tube is controlled to move upward, such as by rotating or pulling upward, the heavy phase liquid level in the heavy phase outflow chamber rises, and the interface of the heavy phase in the phase separation and clarification chamber also rises. When the liquid level regulating tube is controlled to move downward, such as by rotating or plugging downward, the heavy phase liquid level in the heavy phase outflow chamber drops, and the interface of the heavy phase in the phase separation and clarification chamber also drops.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] (1) The mixing and settling device provided by the present invention can increase the liquid holding capacity per unit volume compared to traditional mixing and settling tanks by setting up independent and separate mixing chambers and phase separation and settling chambers, and can improve the mixing effect and phase separation efficiency compared to traditional extraction towers.

[0032] (2) The mixing and clarifying device provided by the present invention is configured to allow the mixed liquid to flow into the middle of the phase separation and clarification chamber. Under the action of the density difference, the heavy phase and the light phase are naturally separated, the heavy phase sinks and the light phase rises. By arranging diverter plates on the upper and lower sides of the middle inlet, the efficiency of the light phase rising or the heavy phase sinking can be improved, thereby greatly accelerating the phase separation speed, reducing the liquid holding capacity of the equipment, and improving the equipment efficiency. Compared with the traditional clarification tank, the volume is greatly reduced, the volume of the clarification chamber can be reduced by more than 1 / 2, and the equipment cost and the reagent cost are also greatly reduced, and the reagent investment can be reduced by more than 50%.

[0033] (3) The mixing and clarifying device provided by the present invention can promote the separation of the two phases by arranging a hydrophilic membrane layer or a hydrophobic membrane layer on the upper surface of the diverter plate, thereby improving the separation efficiency of the light phase and the heavy phase and further shortening the phase separation time.

[0034] (4) The mixing and settling device provided by the present invention is conducive to the connection of multi-stage mixing and settling devices by specifically designing the positions of the heavy phase outlet and the light phase outlet, that is, the heavy phase outlet of this stage is connected to the bottom inlet of the mixing chamber of the next stage, and the light phase outlet of this stage is connected to the bottom inlet of the mixing chamber of the next stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the planar structure of the mixing and clarifying device described in Example 1 of the present utility model;

[0036] Figure 1 Middle: 1-mixing chamber; 2-phase separation and clarification chamber; 3-mixed liquid outflow buffer chamber; 4-diverter plate; 5-heavy phase outflow chamber; 6-heavy phase guide pipe; 7-liquid level regulating pipe; 8-mixed liquid guide pipe; 9-light phase inlet; 10-heavy phase inlet; 11-heavy phase outlet; 12-light phase outlet; 13-first heavy phase drain port; 14-second heavy phase drain port; 15-reflux pipe; 16-stirring device;

[0037] Figure 2 This is a schematic diagram of the three-dimensional structure of the mixing and clarifying device described in Example 1 of the present utility model;

[0038] Figure 3 This is a schematic diagram of the planar structure of the mixing and settling tank described in Comparative Example 1 of the present invention;

[0039] Figure 3 Middle: 101-mixing chamber; 102-clarification chamber; 103-stirring device. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0041] The following is a further detailed description of the present invention. However, the following examples are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0042] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] It should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0044] Those skilled in the art should understand that the present invention must include necessary pipelines, conventional valves and general pump equipment for realizing a complete process, but the above content does not belong to the main invention point of the present invention. Those skilled in the art can add layouts on their own based on the process flow and equipment structure selection, and the present invention does not make special requirements and specific limitations on this.

[0045] Example 1

[0046] This embodiment provides a rapid phase separation mixing and clarifying device, the planar structure diagram and the three-dimensional structure diagram are respectively as follows: Figure 1 and Figure 2As shown, the mixing and clarifying device includes a mixing chamber 1 and a phase separation clarification chamber 2, and a mixed liquid outflow buffer chamber 3 connected thereto is provided on one side of the upper portion of the mixing chamber 1, and the bottom outlet of the mixed liquid outflow buffer chamber 3 is communicated with the middle inlet of the phase separation clarification chamber 2 through a mixed liquid guide pipe 8, and a diverter plate 4 is respectively provided on the upper and lower sides of the middle inlet of the phase separation clarification chamber 2, and the diverter plate 4 is evenly provided with diverter holes with a pore size of 50 mm, and a hydrophilic membrane layer or a hydrophobic membrane layer with a porous structure is provided on the upper surface of the diverter plate 4, such as a polypropylene membrane layer, and the pore size of the membrane layer is 0.5 mm, and a heavy phase outflow chamber 5 is provided on one side of the upper portion of the phase separation clarification chamber 2, and a first heavy phase discharge port 13 on the lower side of the phase separation clarification chamber 2 is connected to the heavy phase through the heavy phase guide pipe 6. The bottom of the phase outflow chamber 5 is connected, the end of the heavy phase guide pipe 6 is located in the heavy phase outflow chamber 5, and a liquid level regulating pipe 7 is sleeved on the outside of the end, the liquid level regulating pipe 7 is threadedly connected or plug-in connected to the end of the heavy phase guide pipe 6, and the liquid level regulating pipe 7 is provided with a concave flow limiting structure above the end, the second heavy phase discharge port 14 on the lower side of the phase separation and clarification chamber 2 is connected to the bottom inlet of the mixing chamber 1 through the reflux conduit 15, and the bottom inlet of the mixing chamber 1 is respectively connected with the light phase inlet 9 and the heavy phase inlet 10, and a heavy phase outlet 11 is provided on the lower side of the heavy phase outflow chamber 5; a light phase outlet 12 is provided on the upper side of the phase separation and clarification chamber 2, the shape of the mixing chamber 1 is cylindrical, and a stirring device 16 is provided in the mixing chamber 1.

[0047] The operation process of the mixing and settling device provided in this embodiment for liquid-liquid extraction is as follows:

[0048] The heavy phase and the light phase are injected into the mixing chamber 1 from the heavy phase inlet 10 and the light phase inlet 9 respectively. The two-phase materials are fully mixed under the action of the stirring device 16, and then enter the mixed liquid through the upper outlet of the mixing chamber 1 and flow out of the buffer chamber 3. Then, the mixed liquid enters the middle inlet of the phase separation clarification chamber 2 through the mixed liquid guide pipe 8. After entering the phase separation clarification chamber 2, the mixed liquid is naturally separated by the density difference. The heavy phase sinks and the light phase rises. The heavy phase or the light phase passes through the diverter plate 4 and is accelerated to separate under the action of the hydrophobic membrane layer (or hydrophilic membrane layer). Finally, a two-phase interface is formed in the phase separation clarification chamber 2. By adjusting the liquid The level regulating tube 7 is rotated or inserted downward, the heavy phase liquid level in the heavy phase outflow chamber 5 is lowered, and the interface of the heavy phase in the phase separation and clarification chamber 2 is also lowered. By adjusting the liquid level regulating tube 7 to rotate or pull up, the heavy phase liquid level in the heavy phase outflow chamber 5 is increased, and the interface of the heavy phase in the phase separation and clarification chamber 2 is also increased, until the interface between the heavy phase and the light phase in the phase separation and clarification chamber 2 is controlled to be located in the middle of the phase separation and clarification chamber 2, and then the solid phase is discharged through the heavy phase outlet 11 of the heavy phase outflow chamber 5, and the light phase is discharged from the light phase outlet 12 of the phase separation and clarification chamber 2, and part of the heavy phase in the phase separation and clarification chamber 2 is recovered to the mixing chamber 1 through the reflux conduit 15 to further improve the separation effect.

[0049] Comparative Example 1

[0050] This comparative example provides a traditional mixing and settling tank, such as Figure 3 As shown, the mixing and settling tank includes a mixing chamber 101 and a settling chamber 102. The mixing chamber 101 is connected to the settling chamber 102 through an overflow port. A stirring device 103 is provided in the mixing chamber.

[0051] Example 1 and Comparative Example 1 were used for liquid-liquid extraction of lithium, with 60% by volume TBP (tributyl phosphate) / sulfonated kerosene as the light phase and concentrated brine containing lithium and magnesium as the heavy phase. The devices provided in Example 1 and Comparative Example 1 were used for mixed clarification, respectively. The extraction rate of the target component lithium in Example 1 reached 78%, and the extraction rate in Comparative Example 1 reached 75%. Under conditions of similar target extraction rates, the phase separation speed in Example 1 was faster, thereby saving equipment volume. The volume of the phase separation clarification chamber in Example 1 was reduced by about 1 / 2 compared to the volume of the clarification chamber in Comparative Example 1, and the cost of the extractant was reduced by about 50%.

[0052] In summary, the mixing and clarifying device provided by the present invention can increase the liquid holding capacity per unit volume, improve equipment efficiency, reduce equipment investment and reagent costs, and facilitate multi-stage connection.

[0053] The applicant declares that the above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by technicians in the relevant technical field within the technical scope disclosed in the present invention fall within the protection scope and disclosure scope of the present invention.

Claims

1. A rapid phase separation mixing and clarifying device, characterized in that: The mixing and clarifying device comprises a mixing chamber and a phase separation and clarifying chamber; A mixed liquid outflow buffer chamber in communication with the mixing chamber is provided on one side of the upper portion of the mixing chamber; The bottom outlet of the mixed liquid flowing out of the buffer chamber is communicated with the middle inlet of the phase separation clarification chamber; Diverter plates are respectively provided on the upper and lower sides of the middle inlet of the phase separation clarification chamber; A heavy phase outflow chamber is provided on one side of the upper portion of the phase separation and clarification chamber; The lower side of the phase separation and clarification chamber is connected to the bottom of the heavy phase outflow chamber through a heavy phase guide pipe. The end of the heavy phase guide pipe is located in the heavy phase outflow chamber, and a liquid level regulating pipe is sleeved on the outer side of the end.

2. The rapid phase separation mixing and settling device according to claim 1, characterized in that: The bottom inlet of the mixing chamber is communicated with the light phase inlet and the heavy phase inlet respectively.

3. The rapid phase separation mixing and settling device according to claim 1, characterized in that: A heavy phase outlet is provided on one side of the lower portion of the heavy phase outflow chamber; and a light phase outlet is provided on one side of the upper portion of the phase separation and clarification chamber.

4. The rapid phase separation mixing and settling device according to claim 1, characterized in that: The lower part of the phase separation clarification chamber is provided with a first heavy phase discharge port and a second heavy phase discharge port; The first heavy phase discharge port is connected to the bottom of the heavy phase outflow chamber through the heavy phase guide pipe; The second heavy phase discharge port is communicated with the bottom inlet of the mixing chamber via a reflux conduit.

5. The rapid phase separation mixing and settling device according to claim 1, characterized in that: The mixing chamber is cylindrical in shape; A stirring device is provided in the mixing chamber.

6. The rapid phase separation mixing and settling device according to claim 1, characterized in that: The diversion plates are evenly provided with diversion holes.

7. The rapid phase separation mixing and settling device according to claim 6, characterized in that: The aperture of the diversion hole is 10-100 mm.

8. The rapid phase separation mixing and settling device according to claim 1, characterized in that: A hydrophilic film layer or a hydrophobic film layer is provided on the upper surface of the diverter plate; The hydrophilic membrane layer or the hydrophobic membrane layer is a porous structure.

9. The rapid phase separation mixing and settling device according to claim 8, characterized in that: The pore size of the hydrophilic membrane layer or the hydrophobic membrane layer is 0.1-1 mm.

10. The rapid phase separation mixing and settling device according to claim 1, characterized in that: The liquid level regulating tube is connected to the end of the heavy phase flow guide tube by thread or plug-in connection.

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