Reverse extraction kettle for gas phase, liquid phase and liquid phase

Abstract

The utility model discloses a reverse extraction kettle for gas-liquid-liquid three phases, which belongs to the field of chemical equipment and comprises a reverse extraction container, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator and a gas-liquid separator, and the reverse extraction container is internally provided with a premixing chamber and a mixing chamber which are arranged up and down; the stirring assembly is arranged in the mixing chamber; and the crushing assembly is arranged at the end, away from the stirring assembly, in the premixing chamber. According to the reverse extraction kettle for the gas-liquid-liquid three phases, the structure of the reverse extraction kettle is improved, and the gas phase and the water phase are pre-dispersed through the premixing chamber at the bottom, so that the mixing efficiency and the reverse extraction efficiency of the gas-liquid-liquid three phases are improved.

Description

Technical Field

[0001] The utility model relates to the field of chemical equipment, in particular to a gas-liquid-liquid three-phase stripping kettle. Background Art

[0002] Extraction stripping is a way to achieve mass transfer between two liquid phases in the real chemical industry. At present, the chemical equipment used for extraction stripping is mainly multi-stage mixing and clarifying tanks; however, the multi-stage mixing and clarifying tanks are currently unable to achieve gas-liquid-liquid three-phase extraction. In ordinary stripping kettles, the stirring is too strong and the liquid-liquid phases are difficult to separate, while the stirring is too weak and the gas phase is difficult to break up and the droplet distribution is uneven, resulting in low stripping efficiency and high stripping cost.

[0003] Chinese patent number CN110306040A discloses a liquid-liquid-solid three-phase extraction system, which can fully separate the liquid-liquid-solid reaction system, but is not applicable to gas-liquid-liquid three-phase;

[0004] Gas-liquid-liquid three-phase extraction has been applied in the metallurgical fields of lithium, rubidium and cesium extraction. It has the advantages of low preparation cost and simple process flow because it can directly obtain carbonates of metals such as lithium, rubidium and cesium through carbon dioxide stripping. How to realize the gas-liquid-liquid three-phase extraction process is an urgent problem to be solved. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a gas-liquid-liquid three-phase stripping kettle, which adopts the following technical solutions:

[0006] A gas-liquid-liquid three-phase stripping kettle, comprising:

[0007] A stripping container, wherein a premixing chamber and a mixing chamber are disposed up and down in the stripping container;

[0008] A stirring assembly, the stirring assembly being disposed in the mixing chamber;

[0009] A crushing assembly is arranged in the premixing chamber at one end away from the stirring assembly.

[0010] Furthermore, a sieve plate is provided in the stripping container, and the sieve plate separates the stripping container into the mixing chamber and the premixing chamber.

[0011] Furthermore, the stirring assembly includes a rotating shaft and a plurality of vortex paddles; the first end of the rotating shaft is rotatably connected to the top of the stripping container, and the second end of the rotating shaft extends into the mixing chamber; the plurality of vortex paddles are evenly arranged circumferentially in the second end of the rotating shaft.

[0012] Furthermore, the crushing assembly includes a premixing crushing paddle; the premixing crushing paddle is fixedly connected to the rotating shaft, the vortex paddle and the premixing crushing paddle are both arranged on the rotating shaft, and the premixing crushing paddle is arranged below the vortex paddle; the screen plate is arranged between the premixing crushing paddle and the vortex paddle, the screen plate is a hollow structure, the screen plate is sleeved on the outside of the rotating shaft and fixedly connected to the inner wall of the reaction container.

[0013] Furthermore, the stripping container is cylindrical, and the rotating shaft is arranged on the central axis of the stripping container.

[0014] Furthermore, a top baffle with a hollow structure is provided on the top inner wall of the stripping container, and the rotating shaft passes through a central hole of the top baffle.

[0015] Furthermore, a plurality of annular baffles are evenly arranged on the inner wall of the stripping container from top to bottom, and the plurality of annular baffles are arranged between the top baffle and the sieve plate.

[0016] Furthermore, an oil phase inlet communicating with the mixing chamber is provided at the top of the stripping container.

[0017] Furthermore, the bottom of the stripping container is provided with a water phase inlet, a gas phase inlet and a heavy phase outlet which are connected with the premixing chamber.

[0018] Furthermore, a light phase outlet is provided on the side wall of the stripping container, and the light phase outlet is provided between the annular baffle located at the lowermost end and the sieve plate.

[0019] Beneficial effects:

[0020] The utility model is used for the gas-liquid-liquid three-phase stripping kettle, which pre-disperses the gas phase and the water phase through the bottom premixing chamber, thereby improving the gas-liquid-liquid three-phase mixing efficiency and the stripping efficiency; by arranging a top baffle and an annular baffle in the mixing chamber, the gas utilization rate is improved, the production cost is reduced, and the stripping efficiency is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the internal structure of the gas-liquid-liquid three-phase stripping kettle of the utility model;

[0022] Among them, 1. top baffle; 2. annular baffle; 3. vortex paddle; 4. sieve plate; 5. premixing and crushing paddle; 6. water phase inlet; 7. gas phase inlet; 8. oil phase inlet; 9. premixing chamber; 10. mixing chamber; 11. light phase outlet; 12. heavy phase outlet. DETAILED DESCRIPTION

[0023] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more understandable, the specific implementation methods of the utility model are listed below.

[0024] Example 1

[0025] Reference Figure 1 , a gas-liquid-liquid three-phase stripping kettle, comprising:

[0026] A stripping container, wherein a premixing chamber 9 and a mixing chamber 10 are arranged vertically in the stripping container;

[0027] A stirring assembly, the stirring assembly is arranged in the mixing chamber 10;

[0028] The crushing assembly is arranged in the premixing chamber 9 at one end away from the stirring assembly.

[0029] In this embodiment, a sieve plate 4 is provided in the stripping container, and the sieve plate 4 divides the stripping container into a mixing chamber 10 and a premixing chamber 9 .

[0030] In this embodiment, the stirring assembly includes a rotating shaft and multiple vortex paddles 3; the first end of the rotating shaft is rotatably connected to the top of the stripping container, and the second end of the rotating shaft extends into the mixing chamber; the multiple vortex paddles 3 are evenly arranged circumferentially at the second end of the rotating shaft.

[0031] Through the above technical solution, the sieve plate 4 is made of hydrophilic and oleophobic material, which can prevent the oil phase of the mixing chamber 10 from entering the premixing chamber 9, and can also ensure that the water phase of the bottom premixing chamber 9 enters the mixing chamber 10. The sieve plate 4 is preferably a dense sieve plate, and the aperture of the mesh on the sieve plate 4 is 2-4mm, and the porosity is 15%-30%. In this embodiment, the aperture of the mesh on the sieve plate 4 is preferably 3mm, and the porosity is preferably 20%.

[0032] In this embodiment, the crushing assembly includes a premixing crushing paddle 5; the premixing crushing paddle 5 is fixedly connected to the rotating shaft, the vortex paddle 3 and the premixing crushing paddle 5 are both arranged on the rotating shaft, and the premixing crushing paddle 5 is arranged below the vortex paddle 3; the sieve plate 4 is arranged between the premixing crushing paddle 5 and the vortex paddle 3, the sieve plate 4 is a hollow structure, the sieve plate 4 is sleeved on the outside of the rotating shaft and fixedly connected to the inner wall of the reaction container.

[0033] In this embodiment, the stripping container is cylindrical, and the rotating shaft is arranged on the central axis of the stripping container.

[0034] In this embodiment, a top baffle plate 1 with a hollow structure is disposed on the top inner wall of the stripping container, and the rotating shaft passes through the central hole of the top baffle plate 1 .

[0035] Through the above technical solution, the top baffle 1 ensures that the upward-flowing fluid generates downward-flowing power after hitting the top baffle 1, so that a vortex circulation is generated in the mixing chamber 10. At the same time, the top baffle 1 can slow down the gas discharge. The size of the top baffle 1 is 1 / 2-3 / 4 of the cross-section of the stripping container. In this embodiment, the size of the top baffle 1 is 1 / 2 of the cross-section of the reaction container.

[0036] In this embodiment, a plurality of annular baffles 2 are evenly arranged on the inner wall of the stripping container from top to bottom, and the plurality of annular baffles 2 are arranged between the top baffle 1 and the sieve plate 4 .

[0037] Through the above technical solution, the size of the annular baffle 2 is 1 / 5-1 / 2 of the cross-section of the stripping container. In the present embodiment, the size of the annular baffle 2 is 2 / 5 of the cross-section of the stripping container. The annular baffle 2 can prevent the gas from flowing away from the wall of the stripping container, while increasing the gas rising resistance, increasing the residence time of the gas in the stripping container, and improving the gas utilization rate.

[0038] In this embodiment, an oil phase inlet 8 communicating with the mixing chamber 10 is provided at the top of the stripping container.

[0039] In this embodiment, a water phase inlet 6 , a gas phase inlet 7 and a heavy phase outlet 12 communicating with the premixing chamber 9 are provided at the bottom of the stripping container.

[0040] In this embodiment, a light phase outlet 11 is provided on the side wall of the stripping container, and the light phase outlet 11 is provided between the annular baffle 2 and the sieve plate 4 at the lower end.

[0041] Through the above technical scheme, the premixing and crushing paddle 5 used in the premixing chamber 9 at the bottom adopts a large-diameter premixing and crushing paddle, which can first strengthen the mixing of the water phase and the gas phase, and pre-disperse the gas phase at the same time; a turbine paddle 3 with a large suction force is provided in the middle of the mixing chamber 10 to ensure that the water phase in the bottom premixing chamber 9 can pass through the sieve plate 4 and continuously enter the upper mixing chamber 10; the premixing chamber 9 and the mixing chamber 8 allow the water phase and the organic phase to be discharged from the stripping container respectively to avoid mutual contamination from sharing the same pipeline. At the same time, the material of the sieve plate 4 is hydrophilic and oleophobic. When the water phase flows out from the bottom heavy phase port, the organic phase is isolated from being discharged from the bottom, avoiding the entrainment of the organic phase in the water phase when it flows out.

[0042] The utility model provides a gas-liquid-liquid three-phase stripping kettle, taking metal cesium as an example, and its working principle is as follows:

[0043] In the process of cesium metal extraction, the loaded t-BAMBP after cesium extraction is washed with pure water and then enters the stripping kettle for stripping. After the pure water fills the premixing chamber 9 from the water phase inlet 7, stirring is turned on. At this time, the premixing crushing paddle 5 and the turbine paddle 3 start to rotate, and the carbon dioxide gas used for stripping enters the bottom premixing chamber 9 from the gas phase inlet 7. At this time, the carbon dioxide and pure water are premixed, and the carbon dioxide is pre-dispersed at the same time; at this time, the loaded t-BAMBP continuously enters the mixing chamber 10 from the top oil phase inlet 8 of the mixing chamber 10, and the premixed pure water and carbon dioxide continuously enter the mixing chamber 10 under the action of the turbine paddle 3 with high suction force and are continuously drawn into the mixing chamber 10 to mix and strip with the loaded t-BAMBP. The gas-liquid-liquid three-phase entering the mixing chamber 10 generates a downward force after contacting the top baffle 1, so that the mixing chamber 10 generates a vortex circulation, and the top baffle liquid 1 can slow down the discharge of carbon dioxide; after a stripping cycle is completed, the mixed phase after stripping is allowed to stand in the stirred kettle for phase separation, the organic phase is discharged from the light phase outlet 11, and the water phase is discharged from the heavy phase outlet 12.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A gas-liquid-liquid three-phase stripping kettle, characterized in that: include: A stripping container, wherein the stripping container is provided with a premixing chamber (9) and a mixing chamber (10) arranged vertically; A stirring component, the stirring component being arranged in the mixing chamber (10); A crushing assembly, wherein the crushing assembly is arranged in the premixing chamber (9) at one end away from the stirring assembly.

2. The gas-liquid-liquid three-phase stripping kettle according to claim 1, characterized in that: A sieve plate (4) is arranged in the stripping container, and the sieve plate (4) divides the stripping container into the mixing chamber (10) and the premixing chamber (9).

3. The gas-liquid-liquid three-phase stripping kettle according to claim 2, characterized in that: The stirring assembly comprises a rotating shaft and a plurality of vortex paddles (3); the first end of the rotating shaft is rotatably connected to the top of the stripping container, and the second end of the rotating shaft extends into the mixing chamber; the plurality of vortex paddles (3) are evenly arranged in the circumferential direction at the second end of the rotating shaft.

4. The gas-liquid-liquid three-phase stripping kettle according to claim 3, characterized in that: The crushing assembly comprises a premixing crushing paddle (5); the premixing crushing paddle (5) is fixedly connected to the rotating shaft, the vortex paddle (3) and the premixing crushing paddle (5) are both arranged on the rotating shaft, and the premixing crushing paddle (5) is arranged below the vortex paddle (3); the sieve plate (4) is arranged between the premixing crushing paddle (5) and the vortex paddle (3), the sieve plate (4) is a hollow structure, the sieve plate (4) is sleeved on the outside of the rotating shaft and fixedly connected to the inner wall of the stripping container.

5. The gas-liquid-liquid three-phase stripping kettle according to claim 4, characterized in that: The stripping container is cylindrical, and the rotating shaft is arranged on the central axis of the stripping container.

6. The gas-liquid-liquid three-phase stripping kettle according to claim 5, characterized in that: A top baffle plate (1) with a hollow structure is arranged on the top inner wall of the stripping container, and the rotating shaft passes through a central hole of the top baffle plate (1).

7. The gas-liquid-liquid three-phase stripping kettle according to claim 6, characterized in that: The inner wall of the stripping container is evenly provided with a plurality of annular baffles (2) from top to bottom, and the plurality of annular baffles (2) are arranged between the top baffle (1) and the sieve plate (4).

8. The gas-liquid-liquid three-phase stripping kettle according to claim 7, characterized in that: The top of the stripping container is provided with an oil phase inlet (8) which is in communication with the mixing chamber (10).

9. The gas-liquid-liquid three-phase stripping kettle according to claim 8, characterized in that: The bottom of the stripping container is provided with a water phase inlet (6), a gas phase inlet (7) and a heavy phase outlet (12) which are connected to the premixing chamber (9).

10. The gas-liquid-liquid three-phase stripping kettle according to claim 9, characterized in that: A light phase outlet (11) is provided on the side wall of the stripping container, and the light phase outlet (11) is provided between the annular baffle (2) located at the lowermost end and the sieve plate (4).

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