Liquid-liquid separating and buffering device

Abstract

The invention relates to a liquid-liquid separation and buffer device which comprises a container shell, a coalescer, a light phase baffle, a heavy phase baffle, a heavy phase and liquid phase communicating pipe and a light phase and liquid phase communicating pipe, the coalescer, the light-phase baffle and the heavy-phase baffle are sequentially arranged in the container shell in a pairwise spaced mode in the first direction, a stable split-phase area is defined between the coalescer and the light-phase baffle, and a light-phase buffering area is defined by the light-phase baffle and the heavy-phase baffle. A heavy phase buffer area is defined between the heavy phase baffle and the first side wall of the container shell in the first direction; the first end of the heavy-phase and liquid-phase communicating pipe is communicated with the lower part of the stable split-phase area, and the second end is communicated with the upper part of the heavy-phase buffer area; the first end of the light-phase and liquid-phase communicating pipe is communicated with the upper part of the stable split-phase area, and the second end is communicated with the light-phase buffer area. The stable split-phase area and the heavy-phase buffer area are communicated through the heavy-phase and liquid-phase communicating pipe, and the stable split-phase area and the light-phase buffer area are communicated through the light-phase and liquid-phase communicating pipe, so that stable interface control is realized.

Description

Technical Field

[0001] The present disclosure relates to the technical field of liquid-liquid separation equipment, and in particular, to a liquid-liquid separation and buffer device. Background Art

[0002] In the polymer process, for the case where the solvent is insoluble in water and there are residual additives in the polymer solution and the additives are soluble in water, water washing or extraction technology is generally used to contact water with the polymer solution and then separate the water and the polymer solution into layers, and the additives remain in the water, thereby removing the additives from the polymer solution to obtain a residual qualified product solution.

[0003] At present, there are the following difficulties in measuring and controlling the interface of the liquid-liquid phase separation tank of water and polymer solution: due to the high viscosity of the polymer solution of some systems, the float is stuck and the liquid level cannot be measured using the float level gauge. Diluting the polymer solution to reduce the viscosity will greatly increase the equipment size and operating costs; increasing the temperature of the polymer solution will increase the system pressure and increase the operating costs. The increase in the solubility of the two phases is more likely to cause unclear liquid levels and increase the processing flow; the density difference between the polymer solution and water is small, and the pressure difference caused by the change in the phase interface height is smaller than the accuracy of the pressure difference measuring device. The interface disturbance caused by the liquid entering the phase separation tank makes the pressure difference measurement method unreliable.

[0004] In the wet coagulation unit and refining recovery unit of rubber, the water value in the liquid-liquid separation tank of the solvent and water is too high, and the solvent dehydration is unqualified. This is partly due to the serious emulsification of the solvent and water, the unclear phase interface, the presence of a misty transition layer, and the presence of a large number of water-in-oil and oil-in-water droplets in the transition layer, which makes it difficult to remove water from the solvent. In addition, the interface disturbance caused by the liquid entering the liquid-liquid separation tank can easily lead to unqualified water value in the solvent.

[0005] Therefore, it is necessary to find a device that can reduce interface disturbances and achieve simple and stable control of the liquid-liquid interface of water and polymer solution or solvent, so as to ensure efficient phase separation of the liquid-liquid phases and achieve stability and reliability of the process. Summary of the invention

[0006] The purpose of the present disclosure is to provide a liquid-liquid separation and buffer device, which can solve the technical problems existing in the related art.

[0007] In order to achieve the above object, the present disclosure provides a liquid-liquid separation and buffering device, the device comprising a container shell, a coalescer, a light phase baffle, a heavy phase baffle, a heavy phase liquid phase communicating pipe, and a light phase liquid phase communicating pipe;

[0008] The coalescer, the light phase baffle and the heavy phase baffle are sequentially arranged in the container shell in pairs along the first direction, a stable phase separation area is defined between the coalescer and the light phase baffle, a light phase buffer area is defined between the light phase baffle and the heavy phase baffle, and a heavy phase buffer area is defined between the heavy phase baffle and the first side wall of the container shell along the first direction; or, the coalescer, the heavy phase baffle and the light phase baffle are sequentially arranged in the container shell in pairs along the first direction, the coalescer and the heavy phase baffle define a stable phase separation area, the heavy phase baffle and the light phase baffle define a heavy phase buffer area, and the light phase baffle and the first side wall of the container shell along the first direction define a light phase buffer area;

[0009] The first end of the heavy phase liquid phase communicating tube is communicated with the lower part of the stable phase separation region, and the second end is communicated with the upper part of the heavy phase buffer region; the first end of the light phase liquid phase communicating tube is communicated with the upper part of the stable phase separation region, and the second end is communicated with the light phase buffer region.

[0010] Optionally, the device also includes a feed pipe, and a feed buffer area is defined between the agglomerator and the second side wall of the container shell along the first direction, the first end of the feed pipe is arranged on the container shell, and the second end of the feed pipe is inserted into the feed buffer area; a light phase discharge port is arranged at the bottom of the light phase buffer area, and a heavy phase discharge port is arranged at the bottom of the heavy phase buffer area.

[0011] Optionally, the device also includes a feed baffle, the feed pipe is extended along the first direction, the second end of the feed pipe is formed with an opening, the feed baffle is extended along the second direction and is arranged in the feed buffer area, and the feed baffle and the second end of the feed pipe are spaced and arranged opposite to each other along the first direction; wherein, the first direction and the second direction are arranged to intersect, or, the feed pipe is extended along the second direction, the second end of the feed pipe is in a blocked shape, and an opening is formed on the side of the feed pipe away from the agglomerator along the first direction; wherein, the first direction and the second direction are arranged to intersect.

[0012] Optionally, when the light phase baffle is disposed adjacent to the coalescer, the light phase liquid phase communicating pipe is disposed in the container shell and passes through the light phase baffle along the first direction to communicate the stable phase separation region and the light phase buffer region; or, a first end of the light phase liquid phase communicating pipe is communicated with an upper portion of the stable phase separation region, and a second end passes through the container shell and is communicated to the light phase buffer region, and the light phase liquid phase communicating pipe is provided with a first shut-off valve;

[0013] or,

[0014] When the heavy phase baffle is arranged adjacent to the coalescer, the light phase liquid phase communicating pipe is arranged in the container shell and passes through the heavy phase baffle and the light phase baffle along the first direction to connect the stable phase separation region and the light phase buffer region; alternatively, the first end of the light phase liquid phase communicating pipe is communicated with the upper part of the stable phase separation region, and the second end passes through the container shell to be connected to the light phase buffer region, and the light phase liquid phase communicating pipe is provided with a first shut-off valve.

[0015] Optionally, when the light phase baffle is disposed adjacent to the coalescer, the heavy phase liquid phase communicating pipe is disposed in the container shell and passes through the light phase baffle and the heavy phase baffle to communicate the stable phase separation region and the heavy phase buffer region, or the first end of the heavy phase liquid phase communicating pipe is communicated with the lower part of the stable phase separation region, and the second end passes through the container shell to communicate with the upper part of the heavy phase buffer region, and the heavy phase liquid phase communicating pipe is provided with a second shut-off valve;

[0016] Alternatively, when the heavy phase baffle is arranged adjacent to the coalescer, the heavy phase liquid phase communicating pipe is arranged in the container shell and passes through the heavy phase baffle to connect the stable phase separation region and the heavy phase buffer region, or, the first end of the heavy phase liquid phase communicating pipe is connected to the lower part of the stable phase separation region, and the second end passes through the container shell to be connected to the upper part of the heavy phase buffer region, and the heavy phase liquid phase communicating pipe is provided with a second shut-off valve.

[0017] Optionally, the coalescer, the light phase baffle and the heavy phase baffle all extend along the second direction, and the upper end of the heavy phase baffle along the second direction and the upper end of the light phase baffle along the second direction are both higher than the second end of the heavy phase liquid phase communicating tube, wherein the first direction is arranged to intersect with the second direction.

[0018] Optionally, the device further comprises a light phase liquid level measuring component and a heavy phase liquid level measuring component, the light phase liquid level measuring component is arranged in the light phase buffer area, and the heavy phase liquid level measuring component is arranged in the heavy phase buffer area.

[0019] Optionally, the device also includes a pressure differential measuring device, which includes a pressure differential tube and a measuring device body. The pressure differential tube is arranged outside the container shell, and one end of the pressure differential tube is connected to the feed buffer area, and the other end is connected to the stable phase separation area. The measuring device body is connected to the pressure differential tube.

[0020] Optionally, the device also includes a gas phase balance pipe, which is arranged outside the container shell, and when the light phase baffle hits the inner wall of the container shell along the second direction, one end of the gas phase balance pipe is connected to the light phase buffer area, and the other end is connected to the stable phase separation area; wherein the first direction is arranged to intersect with the second direction; or, when the heavy phase baffle hits the inner wall of the container shell along the second direction, the gas phase balance pipe is arranged outside the container shell, and one end of the gas phase balance pipe is connected to the stable phase separation area, and the other end is connected to the heavy phase buffer area; wherein the first direction is arranged to intersect with the second direction.

[0021] Optionally, the coalescer extends along the second direction, and the outer periphery of the coalescer is arranged in close contact with the inner circumferential wall of the container shell, and the dimension of the coalescer along the first direction is not less than 100 mm, wherein the first direction intersects with the second direction.

[0022] In the above technical solution, the liquid-liquid phase separation tank is divided into different areas, and the stable phase separation area and the heavy phase buffer area are connected by a heavy phase liquid phase connecting pipe, and the stable phase separation area and the light phase buffer area are connected by a light phase liquid phase connecting pipe, and the height of the heavy phase liquid phase connecting pipe and the light phase liquid phase connecting pipe are relied on to achieve accurate and stable interface and liquid level control. In addition, by setting a coalescer, the separation effect of the liquid-liquid two phases can be enhanced. In addition, the heavy phase buffer area and the light phase buffer area provide cache and liquid level control functions, which ensure the continuous and stable operation of the device and the connected system, shorten the process, and reduce the equipment.

[0023] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of a liquid-liquid separation and buffer device according to an embodiment of the present disclosure, wherein a light phase baffle and a coalescer are arranged adjacent to each other, and a feed pipe is arranged along a second direction.

[0026] Figure 2 It is a structural schematic diagram of a liquid-liquid separation and buffer device according to an embodiment of the present disclosure, wherein a light phase baffle and a coalescer are disposed adjacent to each other, and a feed pipe is arranged along a first direction.

[0027] Figure 3It is a schematic structural diagram of a liquid-liquid separation and buffer device according to an embodiment of the present disclosure, wherein a heavy phase baffle and a coalescer are disposed adjacent to each other, and a feed pipe is arranged along a second direction.

[0028] Figure 4 It is a schematic structural diagram of a liquid-liquid separation and buffer device according to another embodiment of the present disclosure, wherein no coalescer is provided in the device. DETAILED DESCRIPTION

[0029] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0030] In the present disclosure, unless otherwise stated, directional words such as "first direction, second direction" may refer to Figure 1 As shown, the terms such as "first", "second", etc. are used only to distinguish one element from another element and do not have order or importance.

[0031] First of all, it should be explained that coalescence separation is a separation technology based on the formation of a stable liquid film using a wire mesh, which can simultaneously achieve rapid separation and recovery of water entrained in the solvent and solvent entrained in the water. The liquid membrane carrier is generally a wire mesh, which is suitable for occasions with severe emulsification and poor separation effect. For hydrocarbon solvents (oil phase) and water in the liquid-liquid separation tank, due to the small droplet size, the collision probability between the small water droplets in the oil phase and the small oil droplets in the water phase at the liquid level is very small, and it is difficult to merge and become larger, so the two phases are difficult to separate; when they pass through the wire mesh, due to different surface tensions, small water droplets or small oil droplets are adsorbed and aggregated into large droplets when passing through the wire mesh, and separated from the other phase under the action of density difference.

[0032] The density of the liquid-liquid phase is different. The heavy phase connecting tube is filled with heavy phase fluid. When its height is fixed, the static pressure is fixed. In the liquid-liquid stable phase separation area, the light phase needs a considerable height to produce the same static pressure, so that the two-phase interface is stable. It should be noted that when the heavy phase fluid flows from the liquid-liquid phase separation area to the heavy phase buffer area in the connecting tube, the additional resistance brought by its flow will cause the interface to move downward.

[0033] Reference Figures 1 to 3 As shown, the present disclosure provides a liquid-liquid separation and buffering device, which includes a container shell 1, a coalescer 3, a light phase baffle 4, a heavy phase baffle 5, a heavy phase liquid phase communicating pipe 6 and a light phase liquid phase communicating pipe 18.

[0034] The coalescer 3, the light phase baffle 4 and the heavy phase baffle 5 are sequentially arranged in the container shell 1 in pairs along the first direction A, a stable phase separation area 8 is defined between the coalescer 3 and the light phase baffle 4, the light phase baffle 4 and the heavy phase baffle 5 define a light phase buffer area 9, and a heavy phase buffer area 10 is defined between the heavy phase baffle 5 and the first side wall of the container shell 1 along the first direction A; or, the coalescer 3, the heavy phase baffle 5 and the light phase baffle 4 are sequentially arranged in the container shell 1 in pairs along the first direction A, the coalescer 3 and the heavy phase baffle 5 define a stable phase separation area 8, the heavy phase baffle 5 and the light phase baffle 4 define a heavy phase buffer area 10, and the light phase baffle 4 and the first side wall of the container shell 1 along the first direction A define a light phase buffer area 9.

[0035] The first end of the heavy phase liquid phase connecting pipe 6 is connected to the lower part of the stable phase separation area 8, and the second end is connected to the upper part of the heavy phase buffer area 10; the first end of the light phase liquid phase connecting pipe 18 is connected to the upper part of the stable phase separation area 8, and the second end is connected to the light phase buffer area 9.

[0036] In the above technical solution, the liquid-liquid phase separation tank is divided into different areas, and the stable phase separation area 8 and the heavy phase buffer area 10 are connected through the heavy phase liquid phase connecting pipe 6, and the stable phase separation area 8 and the light phase buffer area 9 are connected through the light phase liquid phase connecting pipe 18. The height of the heavy phase liquid phase connecting pipe 6 and the light phase liquid phase connecting pipe 18 is relied on to achieve accurate and stable interface and liquid level control, and the separation effect of the liquid-liquid two phases can be enhanced by setting the coalescer 3. In addition, the heavy phase buffer area 10 and the light phase buffer area 9 provided at the same time provide buffering and liquid level control functions, which ensure the continuous and stable operation of the device and the connected system, and shorten the process and reduce the equipment.

[0037] In one embodiment, reference Figures 1 to 3 As shown, the device further includes a feed pipe 2, a feed buffer area 7 is defined between the coalescer 3 and the second side wall of the container shell 1 along the first direction A, the first end of the feed pipe 2 is used to be arranged on the container shell 1, and the second end of the feed pipe 2 is inserted into the feed buffer area 7, a light phase discharge port 12 is arranged at the bottom of the light phase buffer area 9, and a heavy phase discharge port 11 is arranged at the bottom of the heavy phase buffer area 10. The feed pipe 2 can be constructed in any appropriate shape and structure, which is not limited in the present disclosure.

[0038] Specifically, refer to Figure 2As shown, the device further includes a feed baffle 14, the feed pipe 2 is extended along the first direction A, the second end of the feed pipe 2 is formed with an opening, the feed baffle 14 is extended along the second direction B and arranged in the feed buffer area 7, and the feed baffle 14 and the second end of the feed pipe 2 are spaced and arranged oppositely along the first direction A; wherein the first direction A and the second direction B are arranged to intersect. By arranging the feed baffle 14, the interface disturbance caused by the liquid entering the container shell 1 can be effectively reduced. The width of the above-mentioned feed baffle 14 is 2D-6D, wherein D is the diameter of the heavy phase liquid phase communicating tube 6.

[0039] Or, refer to Figure 1 As shown, the feed pipe 2 extends along the second direction B, the second end of the feed pipe 2 is blocked, and an opening is formed on the side of the feed pipe 2 away from the coalescer 3 along the first direction A; wherein the first direction A and the second direction B are arranged to intersect. By arranging the opening on the side of the feed pipe 2 away from the coalescer 3 along the first direction A, the interference of the liquid entering the container shell 1 on the interface can be effectively reduced. The width of the opening is 0.5D-1D, the height of the opening is 1D-5D, and the center line of the opening is flush with the interface, wherein D is the diameter of the heavy phase liquid phase connecting pipe 6.

[0040] Optionally, refer to Figure 1 and Figure 2 As shown, when the light phase baffle 4 is arranged adjacent to the coalescer 3, the light phase liquid phase communicating pipe 18 is arranged in the container shell 1 and passes through the light phase baffle 4 along the first direction A to connect the stable phase separation area 8 and the light phase buffer area 9; alternatively, the first end of the light phase liquid phase communicating pipe 18 is connected to the upper part of the stable phase separation area 8, and the second end passes through the container shell 1 to be connected to the light phase buffer area 9.

[0041] The light phase liquid phase communicating pipe 18 passes through the light phase baffle 4 to communicate the stable phase separation area 8 and the light phase buffer area 9, that is, the light phase liquid phase communicating pipe 18 can be set on the light phase baffle 4, so that the light phase fluid flows into the light phase buffer area 9 without flooding the light phase baffle. Alternatively, when the light phase liquid phase communicating pipe 18 passes through the container shell 1, a corresponding first valve can be set to control the liquid level at the upper part of the stable phase separation area 8, for example, a full-diameter ball valve can be set.

[0042] Or, refer to Figure 3 As shown, when the heavy phase baffle 5 is arranged adjacent to the coalescer 3, the light phase liquid phase communicating pipe 18 is arranged in the container shell 1 and passes through the heavy phase baffle 5 and the light phase baffle 4 along the first direction A to connect the stable phase separation area 8 and the light phase buffer area 9; alternatively, the first end of the light phase liquid phase communicating pipe 18 is connected to the upper part of the stable phase separation area 8, and the second end passes through the container shell 1 to be connected to the light phase buffer area 9.

[0043] The light phase liquid phase communicating pipe 18 passes through the heavy phase baffle 5 and the light phase baffle 4 to communicate the stable phase separation area 8 and the light phase buffer area 9, that is, the light phase liquid phase communicating pipe 18 can be set at the heavy phase baffle 5 and the light phase baffle 4, so that the light phase fluid flows into the light phase buffer area 9 without flooding the heavy phase baffle 5 to cause the heavy phase to be contaminated. Alternatively, when the light phase liquid phase communicating pipe 18 passes through the container shell 1, a corresponding first valve can be set to control the liquid level in the stable phase separation area, for example, a full-diameter ball valve can be set.

[0044] Optionally, refer to Figure 1 and Figure 2 As shown, when the light phase baffle 4 is arranged adjacent to the coalescer 3, the heavy phase liquid phase communicating pipe 6 is arranged in the container shell 1 and passes through the light phase baffle 4 and the heavy phase baffle 5 to connect the stable phase separation region 8 and the heavy phase buffer region 10, or, the first end of the heavy phase liquid phase communicating pipe 6 is connected to the lower part of the stable phase separation region 8, and the second end passes through the container shell 1 to be connected to the upper part of the heavy phase buffer region 10.

[0045] The heavy phase liquid phase connecting pipe 6 passes through the light phase baffle 4 and the heavy phase baffle 5, so that the heavy phase fluid can flow from the bottom of the stable phase separation area 9 into the upper part of the heavy phase buffer area. Alternatively, when the heavy phase liquid phase connecting pipe 6 passes through the container shell 1, a corresponding second valve can be set to control the light phase and heavy phase interface of the phase separation stable area 8. For example, a full-diameter ball valve can be set.

[0046] Or, refer to Figure 3 As shown, when the heavy phase baffle 5 is arranged adjacent to the coalescer 3, the heavy phase liquid phase communicating tube 6 is arranged in the container shell 1 and passes through the heavy phase baffle 5 to connect the stable phase separation region 8 and the heavy phase buffer region 10, or, the first end of the heavy phase liquid phase communicating tube 6 is connected to the lower part of the stable phase separation region 8, and the second end passes through the container shell 1 to be connected to the upper part of the heavy phase buffer region 10.

[0047] The heavy phase liquid phase connecting pipe 6 passes through the heavy phase baffle 5, so that the heavy phase fluid at the light phase-heavy phase interface in the phase separation stable area 8 can flow from the bottom of the stable phase separation area 9 into the upper part of the heavy phase buffer area to ensure the stability of the interface. Alternatively, when the heavy phase liquid phase connecting pipe 6 passes through the container shell 1, a corresponding second valve can be set to control the light phase-heavy phase interface in the phase separation stable area 8, for example, a full-diameter ball valve can be set.

[0048] In other embodiments, referring to Figures 1 to 3 As shown, the coalescer 3, the light phase baffle 4 and the heavy phase baffle 5 all extend along the second direction B, and the upper end of the heavy phase baffle 5 along the second direction B and the upper end of the light phase baffle 4 along the second direction B are both higher than the second end of the heavy phase liquid phase communicating tube 6, wherein the first direction A and the second direction B are arranged to intersect to ensure the normal operation of the heavy phase liquid phase communicating tube 6.

[0049] Optionally, refer to Figures 1 to 3 As shown, the device also includes a light phase liquid level measuring component 15 and a heavy phase liquid level measuring component 16. The light phase liquid level measuring component 15 is arranged in the light phase buffer area 9, and the heavy phase liquid level measuring component 16 is arranged in the heavy phase buffer area 10, so as to measure the liquid level heights of the light phase buffer area 9 and the heavy phase buffer area 10 respectively. Specifically, the light phase liquid level measuring component 15 and the heavy phase liquid level measuring component 16 can be constructed as liquid level gauges.

[0050] In other embodiments, referring to Figures 1 to 3 As shown, the device further includes a differential pressure measuring member 17, which includes a differential pressure tube and a measuring member body. The differential pressure tube 17 is arranged outside the container shell 1, and one end of the differential pressure tube 17 is connected to the feed buffer area 7, and the other end is connected to the stable phase separation area 8, and the measuring member body is connected to the differential pressure tube. Thus, the differential pressure of the coalescer between the feed buffer area 7 and the stable phase separation area 8 is detected to timely discover abnormalities in the production process.

[0051] Optionally, refer to Figures 1 to 3 As shown, the device further includes a gas phase balance pipe 13, which is arranged outside the container shell 1. When the light phase baffle 4 abuts against the inner wall of the container shell 1 along the second direction B, one end of the gas phase balance pipe 13 is connected to the light phase buffer area 9, and the other end is connected to the stable phase separation area 8; or, when the heavy phase baffle 5 abuts against the inner wall of the container shell 1 along the second direction B, the gas phase balance pipe 13 is arranged outside the container shell 1, and one end of the gas phase balance pipe 13 is connected to the stable phase separation area 8, and the other end is connected to the heavy phase buffer area 10. The gas phase balance pipe ensures that the pressure in each area of ​​the device is consistent to ensure the stability and controllability of the liquid level and interface.

[0052] In addition, the coalescer 3 extends along the second direction B, and the outer periphery of the coalescer 3 is arranged in close contact with the inner peripheral wall of the container shell 1, and the size of the coalescer 3 along the first direction A is not less than 100 mm, wherein the first direction A intersects with the second direction B. However, the present disclosure does not limit the specific size of the coalescer 3.

[0053] In general, the beneficial effects of the technical solution disclosed in the present invention are as follows:

[0054] 1) The present invention controls the phase interface through the highly stable control of the connecting pipe, which will not fail due to instrument error or failure. At the same time, the connecting pipe of the present invention is short in length and has a very small flow pressure drop, which basically does not cause interface changes, thereby ensuring the stability and reliability of the process.

[0055] 2) The coalescer 3 added to the device disclosed in the present invention can enhance the phase separation effect, solve the phase separation difficulties caused by unclear liquid level, and ensure that the two phases are separated properly. At the same time, the coalescer has a small pressure drop and will not bring additional burden to the system.

[0056] 3) The device disclosed in the present invention allows a wide range of changes in the density difference between the liquid and liquid phases, and has a wide range of applicability in the liquid viscosity range. It is suitable for liquid-liquid separation of different liquid-liquid mixture systems, especially for liquid-liquid separation of systems with small density difference, large viscosity, and severe emulsification.

[0057] 4) The device disclosed in the present invention has the advantage of good flexibility. The positions of the light phase and heavy phase baffles can be flexibly adjusted according to the flow rates of the light phase and heavy phase, the size of the equipment saddle, the arrangement of the pipe ports, and the viscosities of the light phase and heavy phase to achieve the goals of liquid-liquid separation and buffering.

[0058] 5) The device disclosed in the present invention has a simple appearance, is easy to support and fix, has simple internal parts, and is easy to manufacture and repair; it does not require a liquid level measuring instrument, saving investment.

[0059] Or, in other embodiments, refer to Figure 4 As shown, the above-mentioned liquid-liquid separation and buffer device may also not be provided with a coalescer 3 to meet different usage requirements.

[0060] The present disclosure also provides two embodiments, which can be specifically referred to as follows:

[0061] Embodiment 1

[0062] Separation of solvent (hexane) and water in rubber wet coagulation unit

[0063] 1. Main parameters and operating conditions: A mixture of hexane and water enters the liquid-liquid separation and buffer device; inlet pressure 0.025MPa, operating temperature 50℃, flow rate: 15m 3 / h, the water content in the mixture is 30%wt.

[0064] 2. Implementation process:

[0065] The mixture of solvent and water enters the liquid-liquid separation and buffer device disclosed in the present invention, and enters the feed pipe 2 from the feed port at the top of the device. The diameter of the feed pipe 2 is DN150mm, the opening width is 100mm, and the opening height is 200mm. The bottom of the feed pipe 2 is sealed, and the liquid enters the separation device horizontally, and returns to the coalescer 3 after reaching the left end cap. The coalescer 3 is 150mm thick and made of 316. When the mixed liquid passes through the coalescer 3, the small droplets of the water phase gather and settle, and the oil phase gathers and rises to reach the stable phase separation area 8. In the stable phase separation area 8, the light phase baffle 4 is 250mm away from the top of the container. The hexane in the upper part of the stable phase separation area 8 overflows through the light phase baffle 4 to the light phase buffer area 9; the water in the lower part overflows through the heavy phase liquid phase connecting pipe 6 to the heavy phase buffer area 10. The height of the heavy phase liquid phase connecting pipe 6 is 1000mm, and the heavy phase baffle 5 is 150mm away from the top of the container. The hexane solvent reaching the light phase buffer area 9 is measured by the light phase liquid level measuring device and is discharged from the light phase discharge port 12 after reaching a certain liquid level. The water reaching the heavy phase buffer area 10 is measured by the heavy phase liquid level measuring device 16 and is discharged from the heavy phase discharge port 11 after reaching a certain liquid level.

[0066] By means of the liquid-liquid separation and buffer device disclosed in the present invention, the free water in the light phase discharged solvent can be reduced to below 150 ppm, thus meeting the production requirements.

[0067] Embodiment 2

[0068] Separation of rubber liquid and water in rubber washing unit (refer to Figure 4 (shown)

[0069] 1. Main parameters and operating conditions: The mixture of cyclohexane-based glue and water enters the liquid-liquid separation and buffer device; inlet pressure 0.15MPa, operating temperature 60℃, flow rate 20m 3 / h, of which water accounts for 50%wt.

[0070] 2. Implementation process:

[0071] The mixture of glue liquid and water enters the liquid-liquid separation and buffering device of the present disclosure, and enters the feed pipe 2 from the feed port on the side of the device. The diameter of the feed pipe 2 is DN200mm. A feed baffle 14 is provided at 400mm along the first direction A of the feed pipe 2. The baffle width is 500mm, and it is in contact with the inner wall of the device from left to right. The liquid enters the separation device horizontally and flows up and down after encountering the feed baffle 14, and reaches the stable phase separation area 8. In the stable phase separation area 8, the glue liquid at the top overflows through the light phase baffle 4 to reach the light phase buffering area 9, and the light phase baffle 4 is 300mm away from the top of the container; the water at the bottom overflows through the heavy phase liquid phase connecting pipe 6 to enter the heavy phase buffering area 10, and the heavy phase liquid phase connecting pipe 6 is 800mm high, and the heavy phase baffle 5 is 200mm away from the top of the container. The glue reaching the light phase buffer area 9 is measured by the light phase liquid level measuring device 15, and is discharged from the light phase discharge port 12 after reaching a certain liquid level. The water reaching the heavy phase buffer area 10 is measured by the heavy phase liquid level measuring device 16, and is discharged from the heavy phase discharge port 11 after reaching a certain liquid level.

[0072] Through the liquid-liquid separation and buffer device disclosed in the present invention, stable control of the liquid-liquid interface between water and glue can be achieved when the two-phase interface instrument cannot be selected due to the high viscosity of the glue, the free water in the light phase discharged from the glue can be reduced to below 200 ppm, the additive residue is qualified, and the production requirements are met.

[0073] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

[0074] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0075] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0076] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A liquid-liquid separation and buffer device, characterized in that: The device comprises a container shell, a coalescer, a light phase baffle, a heavy phase baffle, a heavy phase liquid phase communicating pipe and a light phase liquid phase communicating pipe; The coalescer, the light phase baffle and the heavy phase baffle are sequentially arranged in the container shell in pairs along a first direction, a stable phase separation area is defined between the coalescer and the light phase baffle, a light phase buffer area is defined between the light phase baffle and the heavy phase baffle, and a heavy phase buffer area is defined between the heavy phase baffle and the first side wall of the container shell along the first direction; Alternatively, the coalescer, the heavy phase baffle, and the light phase baffle are sequentially arranged in pairs in the container shell along the first direction, the coalescer and the heavy phase baffle define a stable phase separation area, the heavy phase baffle and the light phase baffle define a heavy phase buffer area, and the light phase baffle and the first side wall of the container shell along the first direction define a light phase buffer area; The first end of the heavy phase liquid phase communicating tube is communicated with the lower part of the stable phase separation region, and the second end is communicated with the upper part of the heavy phase buffer region; the first end of the light phase liquid phase communicating tube is communicated with the upper part of the stable phase separation region, and the second end is communicated with the light phase buffer region.

2. The liquid-liquid separation and buffering device according to claim 1, characterized in that: The device also includes a feed pipe, a feed buffer area is defined between the agglomerator and the second side wall of the container shell along the first direction, the first end of the feed pipe is used to be arranged in the container shell, the second end of the feed pipe is inserted into the feed buffer area, a light phase discharge port is arranged at the bottom of the light phase buffer area, and a heavy phase discharge port is arranged at the bottom of the heavy phase buffer area.

3. The liquid-liquid separation and buffering device according to claim 2, characterized in that: The device further comprises a feed baffle, the feed pipe is extended along the first direction, the second end of the feed pipe is formed with an opening, the feed baffle is extended along the second direction and arranged in the feed buffer area, and the feed baffle and the second end of the feed pipe are spaced and arranged opposite to each other along the first direction; wherein the first direction and the second direction are arranged to intersect, or, The feed pipe is extended along the second direction, the second end of the feed pipe is blocked, and an opening is formed on the side of the feed pipe away from the agglomerator along the first direction; wherein the first direction and the second direction are intersected.

4. The liquid-liquid separation and buffering device according to claim 1, characterized in that: When the light phase baffle is arranged adjacent to the coalescer, the light phase liquid phase communicating pipe is arranged in the container shell and passes through the light phase baffle along the first direction to connect the stable phase separation region and the light phase buffer region; or, the first end of the light phase liquid phase communicating pipe is communicated with the upper part of the stable phase separation region, and the second end passes through the container shell to be connected to the light phase buffer region, and the light phase liquid phase communicating pipe is provided with a first shut-off valve; or, When the heavy phase baffle is arranged adjacent to the coalescer, the light phase liquid phase communicating pipe is arranged in the container shell and passes through the heavy phase baffle and the light phase baffle along the first direction to connect the stable phase separation region and the light phase buffer region; alternatively, the first end of the light phase liquid phase communicating pipe is communicated with the upper part of the stable phase separation region, and the second end passes through the container shell to be connected to the light phase buffer region, and the light phase liquid phase communicating pipe is provided with a first shut-off valve.

5. The liquid-liquid separation and buffering device according to claim 1, characterized in that: When the light phase baffle is arranged adjacent to the coalescer, the heavy phase liquid phase communicating pipe is arranged in the container shell and passes through the light phase baffle and the heavy phase baffle to communicate the stable phase separation region and the heavy phase buffer region, or the first end of the heavy phase liquid phase communicating pipe is communicated with the lower part of the stable phase separation region, and the second end passes through the container shell to communicate with the upper part of the heavy phase buffer region, and the heavy phase liquid phase communicating pipe is provided with a second shut-off valve; Alternatively, when the heavy phase baffle is arranged adjacent to the coalescer, the heavy phase liquid phase communicating pipe is arranged in the container shell and passes through the heavy phase baffle to connect the stable phase separation region and the heavy phase buffer region, or, the first end of the heavy phase liquid phase communicating pipe is connected to the lower part of the stable phase separation region, and the second end passes through the container shell to be connected to the upper part of the heavy phase buffer region, and the heavy phase liquid phase communicating pipe is provided with a second shut-off valve.

6. The liquid-liquid separation and buffering device according to claim 1, characterized in that: The coalescer, the light phase baffle and the heavy phase baffle all extend along the second direction, and the upper end of the heavy phase baffle along the second direction and the upper end of the light phase baffle along the second direction are both higher than the second end of the heavy phase liquid phase communicating tube, wherein the first direction intersects with the second direction.

7. The liquid-liquid separation and buffering device according to claim 2, characterized in that: The device further comprises a light phase liquid level measuring component and a heavy phase liquid level measuring component. The light phase liquid level measuring component is arranged in the light phase buffer region, and the heavy phase liquid level measuring component is arranged in the heavy phase buffer region.

8. The liquid-liquid separation and buffering device according to claim 2, characterized in that: The device also includes a pressure differential measuring device, which includes a pressure differential tube and a measuring device body. The pressure differential tube is arranged outside the container shell, and one end of the pressure differential tube is connected to the feed buffer area, and the other end is connected to the stable phase separation area. The measuring device body is connected to the pressure differential tube.

9. The liquid-liquid separation and buffering device according to claim 1, characterized in that: The device also includes a gas phase balance pipe, which is arranged outside the container shell. When the light phase baffle hits the inner wall of the container shell along the second direction, one end of the gas phase balance pipe is connected to the light phase buffer area, and the other end is connected to the stable phase separation area; wherein the first direction is arranged to intersect with the second direction; or, when the heavy phase baffle hits the inner wall of the container shell along the second direction, the gas phase balance pipe is arranged outside the container shell, one end of the gas phase balance pipe is connected to the stable phase separation area, and the other end is connected to the heavy phase buffer area; wherein the first direction is arranged to intersect with the second direction.

10. The liquid-liquid separation and buffering device according to claim 1, characterized in that: The coalescer extends along the second direction, and the outer periphery of the coalescer is arranged in close contact with the inner circumferential wall of the container shell, and the dimension of the coalescer along the first direction is not less than 100 mm, wherein the first direction intersects with the second direction.

Images