CN112107888A - High-efficiency liquid-liquid two-phase separator with rotational flow and phase separation coupling - Google Patents
High-efficiency liquid-liquid two-phase separator with rotational flow and phase separation coupling Download PDFInfo
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- CN112107888A CN112107888A CN202010789062.0A CN202010789062A CN112107888A CN 112107888 A CN112107888 A CN 112107888A CN 202010789062 A CN202010789062 A CN 202010789062A CN 112107888 A CN112107888 A CN 112107888A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0217—Separation of non-miscible liquids by centrifugal force
Abstract
The invention discloses a high-efficiency liquid-liquid two-phase separator with rotational flow and phase separation coupling, which comprises a tank body, wherein a cyclone, a perforated plate type distribution box and a coalescence separation internal part are sequentially arranged in the tank body from inside to outside in the vertical direction, and a liquid inlet pipe, a light liquid outlet and a heavy liquid outlet are arranged on the tank body. The invention couples the cyclone and the gravity type coalescence-separation internal part, utilizes the cyclone to carry out rapid rough separation, and then carries out secondary separation through the coalescence-separation internal part, so as to improve the separation precision, and finally provides the liquid-liquid two-phase separation device.
Description
Technical Field
The invention relates to the technical field of petrochemical separation, in particular to a heterogeneous phase separation device applied to a petroleum and chemical production process, and particularly relates to a liquid-liquid two-phase separation device.
Background
In the industrial production process, the following three separation methods are mainly used for common liquid-liquid two-phase systems (mostly oil-water mixtures).
The first is a centrifugal separation method, which separates by using centrifugal force and density difference of different components in liquid phase, the liquid phase with high density is gathered outwards by the centrifugal force to form an outer ring, the liquid phase with low density is gathered near the center to form an inner ring, and finally the separation of liquid-liquid components is realized; for example, the common cyclone and centrifuge are centrifugal separation devices, the centrifugal separation method has the advantages of high speed of separating different components, short required time and compact equipment, and the defects of low separation efficiency of the cyclone and high energy consumption and failure rate of the centrifuge.
The second is a gravity separation method, which uses the density difference between liquid phase components to realize separation by gravity settling. In order to strengthen the separation effect, an inclined plate gathering internal part is generally laid in the equipment by using the shallow pool principle for reference. The liquid-liquid two-phase flow flowing horizontally starts to rise due to the buoyancy after passing through the inclined plate, finally reaches the inclined plate and starts to wet the inclined plate to form large liquid drops, and finally forms a flowing liquid film. The light phase liquid drops and the liquid film flowing along the inclined plate are converged into a whole to complete the coalescence process, and finally the liquid drops are discharged from the light phase outlet. The heavy phase component is settled under the action of gravity and flows out from the bottom of the inclined plate, and finally, the two phases are separated. The method has the advantages of good separation effect and low operation cost; the main defects are long retention time required for separation and low liquid phase flow rate, which results in large overall size of equipment, large occupied area of equipment and large investment.
The third is membrane separation method, which uses membrane filtration method to separate different liquid phase components, and its advantages are high separation efficiency, high pressure drop of equipment, low technical maturity, and many limitations for corrosive medium treatment.
Disclosure of Invention
The invention aims to provide a liquid-liquid two-phase separation device, which is used for coupling a cyclone and a gravity type coalescence-separation internal part, performing quick rough separation by using the cyclone and performing secondary separation by using the coalescence-separation internal part and solving the technical problems of large size, low separation efficiency, high energy consumption and high failure rate of the conventional high-efficiency liquid-liquid two-phase separator for coupling the cyclone and the phase separation.
In order to achieve the purpose, the invention provides a liquid-liquid two-phase separation device which comprises a tank body, wherein a cyclone, a perforated plate type distribution box and a coalescence separation internal part are sequentially arranged in the tank body from inside to outside in the vertical direction, and a liquid inlet pipe, a light liquid outlet and a heavy liquid outlet are arranged on the tank body.
Furthermore, the tank body is arranged along the vertical direction, and a flow stabilizing column is arranged at the central axis of the tank body; the swirler is arranged in the middle of the flow stabilizing column and a gap is reserved between the swirler and the tank body.
Furthermore, the liquid inlet pipe is arranged in the middle of the tank body and is connected with the middle upper part of the cyclone; the light liquid outlet is arranged at the top of the tank body; the heavy liquid outlet is arranged at the bottom of the tank body, the bottom of the tank body is a conical end enclosure, and the cone angle is 30-150 degrees.
Furthermore, the swirler is of a cylindrical or conical structure and comprises a liquid inlet, an overflow port and a bottom flow port, the central axis of the swirler is provided with the flow stabilizing column penetrating through the swirler, the overflow port is arranged at the top of the swirler, the bottom flow port is arranged at the bottom of the swirler, and the liquid inlet is arranged at the middle upper part of the swirler and communicated with the liquid inlet pipe.
Furthermore, the bottom outlet of the swirler is provided with an inverted cone structure, the top surface of the swirler is provided with the overflow port, the side wall of the swirler is provided with the liquid inlet, and the bottom surface of the swirler is provided with the underflow port.
Furthermore, an oil-water distribution box is sleeved on the outer surface of the cyclone, and the orifice plate type distribution box is arranged around the outer surface of the oil-water distribution box in a wrapping mode.
Furthermore, the orifice plate type distribution box is divided into an upper separation area and a lower separation area by a middle clapboard, wherein the upper separation area is communicated with the light liquid outlet, and the lower separation area is communicated with the heavy liquid outlet.
Furthermore, the top of the orifice plate type distribution box is sealed by a baffle plate, and the side surface and/or the bottom of the orifice plate type distribution box are/is provided with openings.
Furthermore, the orifice plate type distribution box is provided with a plurality of coalescence separation layers, each coalescence separation layer is provided with two or more coalescence separation internal parts, the coalescence separation internal parts are manufactured by stamping steel plates or plastic plates with the thickness of less than or equal to 0.5mm, the coalescence separation internal parts are in the shapes of inclined plates, V-shaped or W-shaped, and the inclination angle is between 15 and 75 degrees.
Further, a support plate is arranged between the two coalescence-separation layers.
The invention has the beneficial effects that the liquid-liquid two-phase separation device is provided, the cyclone is coupled with the gravity type coalescence-separation internal part, the cyclone is used for rapid rough separation, and then the coalescence-separation internal part is used for secondary separation, so as to improve the separation precision, and finally, the high-efficiency liquid-liquid two-phase separator with the coupling of the cyclone and the phase separation is provided.
More specifically, the advantages of the liquid-liquid two-phase separation device of the present application include the following three aspects:
1) the advantages of short retention time required by centrifugal cyclone separation and high separation efficiency of coalescence separation internals are coupled in a device, so that rapid and efficient purification and separation in an oil-water two-phase mixture are realized;
2) compared with the conventional horizontal phase separator, the oil-water interface is more flexible and convenient to regulate, the operation stability is high, the equipment is compact, the device investment is less, and the occupied area is small;
3) the device can also be used for liquid-solid and oil-water-solid three-phase separation systems, and the technology has wide applicability.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a cyclone-phase and phase-split coupled high-efficiency liquid-liquid two-phase separator provided in an embodiment of the present application.
The designations in the drawings are as follows:
n1-liquid inlet pipe, N2-light liquid outlet, N3-heavy liquid outlet;
1-tank body, 2-heavy phase separation space, 3-annular space, 4-steady flow column, 5-oil water distribution box, 6-cyclone, 7-support plate, 8-coalescence separation internal part, 9-middle partition plate, 10-pore plate type distribution box and 11-baffle plate;
61-liquid inlet, 62-overflow port, 63-bottom flow port.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
As shown in fig. 1, the invention provides a high-efficiency liquid-liquid two-phase separator with coupled rotational flow and phase separation, which comprises a tank body 1, wherein a cyclone 6, a perforated plate type distribution box 10 and a coalescence-separation internal member 8 are sequentially arranged in the tank body 1 from inside to outside in the vertical direction, and a liquid inlet pipe N1, a light liquid outlet N2 and a heavy liquid outlet N3 are arranged on the tank body 1. The liquid inlet pipe N1 is arranged in the middle of the tank body 1 and is connected with the middle upper part of the cyclone 6; the light liquid outlet N2 is arranged at the top of the tank body 1; the heavy liquid outlet N3 is arranged at the bottom of the tank body 1, the bottom of the tank body 1 is a conical end enclosure, and the cone angle is 30-150 degrees.
As shown in fig. 1, in the present embodiment, the tank 1 is arranged in a vertical direction, and a flow stabilizing column 4 is arranged at a central axis thereof; the cyclone 6 is arranged in the middle of the flow stabilizing column 4, a gap is reserved between the cyclone 6 and the tank body 1, the gap forms a heavy phase separation space 2 at the bottom, and the gap forms an annular gap 3 at the side.
As shown in fig. 1, in this embodiment, the cyclone 6 is a cylinder or cone structure, and includes a liquid inlet 61, an overflow port 62, and a bottom flow port 63, wherein the flow stabilizing column 4 penetrating the cyclone 6 is disposed at a central axis position of the cyclone 6, the overflow port 62 of the cyclone 6 is disposed at a top of the cyclone 6, the bottom flow port 63 is disposed at a bottom of the cyclone 6, and the liquid inlet 61 is disposed at an upper middle portion of the cyclone 6 and is communicated with the liquid inlet N1.
As shown in fig. 1, in the present embodiment, the bottom outlet of the cyclone 6 is provided with an inverted cone structure, the top surface thereof is provided with an overflow port 62 of the cyclone 6, the side wall thereof is provided with the liquid inlet 61, and the bottom surface thereof is provided with the underflow port 63.
As shown in fig. 1, in this embodiment, an oil-water distribution box 5 is sleeved on an outer surface of the cyclone, and the orifice-plate-type distribution box 10 is disposed to surround and wrap the outer surface of the oil-water distribution box 5.
As shown in fig. 1, in this embodiment, the orifice plate type distribution box 10 is divided into an upper separation area and a lower separation area by an intermediate partition plate 9, wherein the upper separation area is communicated with the light liquid outlet N2, and the lower separation area is communicated with the heavy liquid outlet N3. The middle partition plate 9 is fixedly connected with the surface of the oil-water distribution box 5, and the oil-water distribution box 5 is divided into an upper part and a lower part to respectively form an upper oil-water distribution box and a lower oil-water distribution box.
In the embodiment shown in fig. 1, the top of the orifice plate type distribution box 10 is sealed by a baffle 11, and the side and/or bottom of the orifice plate type distribution box 10 is provided with an opening.
In the embodiment, as shown in fig. 1, the orifice-plate distribution box 10 is provided with a plurality of coalescence-separation layers, each coalescence-separation layer is provided with two or more coalescence-separation internal members 8, the coalescence-separation internal members 8 are made of steel plates or plastic plates with the thickness of 0.5mm or less by stamping, and are in the shapes of an inclined plate, a V-shape or a W-shape, and the inclination angle is between 15 ° and 75 °.
In this embodiment, as shown in fig. 1, a support plate 7 is further disposed between two of the coalescing separation layers.
According to the efficient liquid-liquid two-phase separator with the coupled cyclone and phase separation, the cyclone 6 is coupled with the gravity type coalescence-separation internal part 8, the cyclone 6 is used for performing rapid rough separation, and then the coalescence-separation internal part is used for performing secondary separation, so that the separation precision is improved, and finally the efficient liquid-liquid two-phase separator with the coupled cyclone and phase separation is provided.
More specifically, the advantages of the liquid-liquid two-phase separation device of the present application include the following three aspects: 1) the advantages of short retention time required by centrifugal cyclone separation and high separation efficiency of coalescence separation internals are coupled in a device, so that rapid and efficient purification and separation in an oil-water two-phase mixture are realized; 2) compared with the conventional horizontal phase separator, the oil-water interface is more flexible and convenient to regulate, the operation stability is high, the equipment is compact, the device investment is less, and the occupied area is small; 3) the device can also be used for liquid-solid and oil-water-solid three-phase separation systems, and the technology has wide applicability.
The method of using the liquid-liquid two-phase separation device described herein above comprises the steps of:
the liquid inlet pipe N1 is connected with the cyclone 6, the light phase and the heavy phase are roughly separated by centrifugal separation, most of the light phase and a small part of the heavy phase enter the upper separation area from the overflow port 62 at the top 6 of the cyclone 6, and the heavy phase and a small part of the light phase contained in the bottom underflow port 63 enter the lower separation area;
II, a pore plate type distribution box 10 is wrapped outside the cyclone, the distribution box and the whole device are divided into an upper separation area and a lower separation area by a middle clapboard 9, wherein the upper separation area is connected with an overflow port 62 of the cyclone 6, and the lower separation area is connected with a bottom flow port 63; because the cyclone 6 has already carried on the light and heavy two-phase and separated fast initially, therefore, the upper separation zone mainly further improves the content of the light phase component, reduce the heavy phase component, the function of the lower separation zone is just opposite to it;
liquid of an overflow port 62 and a bottom flow port 63 of the cyclone 6 respectively enters an upper oil distribution box and a lower oil distribution box, the liquid is uniformly distributed in openings on the side surfaces of the distribution boxes and then enters the coalescence-separation internal member 8, secondary separation of light phase and heavy phase is carried out on the surface of the coalescence-separation internal member 8 by utilizing density difference and a shallow pool principle, wherein heavy phase collected at the bottom of the coalescence-separation internal member 8 can move downwards from an annular gap 3 between the coalescence-separation internal member 8 and leaves the equipment from a bottom heavy liquid outlet N3; the light phase accumulated on the top of the coalescence-separation internal member 8 floats upwards all the time and finally leaves the equipment through a clear liquid outlet N2 on the top, and finally the separation of light and heavy two-phase components is realized;
and iv, the gradually-growing heavy (or light) component liquid drops or liquid films in the upper (or lower) separation zone can respectively enter the lower (or upper) separation zone through the annular space 3 between the coalescence separation internal part 8 and the tank body 1, so that secondary separation of the light and heavy components is realized.
The cyclone 6 is of a cylindrical or conical structure and consists of a liquid inlet 61, an overflow port 62 and a bottom flow port 63, and the center of the cyclone is provided with the steady flow column 4 penetrating through the cyclone 6, so that the cyclone has double functions of enhancing the rotation and separation effects and supporting and fixing the cyclone 6; the underflow port 63 of the swirler 6 is provided with an inverted cone structure, the diameter of a circle at the bottom of the inverted cone is larger than that of the underflow port 63, the inverted cone structure can effectively inhibit the backflow of heavy components near the underflow port 63, the separation efficiency of the swirler 6 is improved, and meanwhile, a fixing device and the flow stabilizing column 4 can be arranged in the underflow port 63.
The orifice plate type distribution box 10 is divided into an upper part and a lower part by a middle clapboard 9, the top of the upper part is sealed, the bottom of the lower distribution box and the side surfaces of the upper distribution box and the lower distribution box, which are connected with the coalescence-separation internal member 8, are provided with holes, the bottom of the lower distribution box is provided with holes, which can ensure that heavy phases separated by a bottom flow port 63 of the cyclone 6 enter the bottom separation space 2, and the side surfaces of the holes are provided with holes for distributing fluid in the orifice plate type distribution box 10 to uniformly flow into the coalescence-separation internal member 8, so that the; the open pore diameter, open pore rate and open pore form of the bottom and side open pore regions may be the same or different.
In order to reduce the weight of equipment and the processing difficulty, the coalescence-separation internal member 8 is made of a thin steel plate (less than or equal to 0.5 mm) or a plastic thin plate (less than or equal to 0.5 mm) by stamping, is in a sloping plate type, a V-shaped or a W-shaped shape, has an inclination angle of 15-75 degrees, and is axially connected with an upper coalescence internal member and a lower coalescence internal member end to end, namely, the coalescence-separation internal member is composed of two layers of coalescence-separation internal members in the longitudinal direction, light phase liquid drops can slowly rise along the surface of the coalescence-separation internal member 8 and are gathered in the rising process to gradually become large liquid drops, and the ideal effect is that; gaps are reserved between the coalescence-separation internal parts 8 in the radial direction, so that light and heavy liquid drops can meet the requirements of ascending and descending, and separation is realized.
A gap is reserved between the coalescence-separation internal member 8 and the tank body 1. The light phase liquid drops grown in the gap by the coalescence-separation internal part 8 slowly rise to enter the upper separation area, and the heavy phase liquid drops separated from the upper separation area sink to the bottom heavy phase separation space 2 by the self gravity, so that the separation efficiency of the device is improved.
The top of the coalescence-separation internal member 8 of the upper separation area is provided with a baffle plate 11. Has two functions: firstly, the support plays a role in reinforcing the cyclone 6 and the coalescence-separation internal member 8, and can also be used as an overhaul platform in the process of equipment overhaul; secondly, prevent that the heavy phase liquid drop that the upper separation zone separated from secondary entry coalescence separation internals 8 separation zone, influence separation efficiency.
The bottom heavy phase separation space is provided with a conical end enclosure, and the cone angle is 30-150 degrees, so that heavy phase liquid drops can slide along the conical surface, and can be separated easily.
The liquid-liquid two-phase separation device provided by the invention has the following advantages:
1) the advantages of short retention time required by centrifugal cyclone separation and high separation efficiency of coalescence separation internals are coupled in a device, so that rapid and efficient purification and separation in an oil-water two-phase mixture are realized;
2) compared with the conventional horizontal phase separator, the oil-water interface is more flexible and convenient to regulate, the operation stability is high, the equipment is compact, the device investment is less, and the occupied area is small;
3) the device can also be used for liquid-solid and oil-water-solid three-phase separation systems, and the technology has wide applicability.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The liquid-liquid two-phase separation device provided in the embodiments of the present application is described in detail above, and the principle and the implementation of the present application are explained in the present application by applying specific examples, and the description of the above embodiments is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A cyclone and phase separation coupled efficient liquid-liquid two-phase separator is characterized by comprising a tank body, wherein a cyclone, a perforated plate type distribution box and a coalescence separation internal part are sequentially arranged in the tank body from inside to outside in the vertical direction, and a liquid inlet pipe, a light liquid outlet and a heavy liquid outlet are arranged on the tank body.
2. The high efficiency liquid-liquid two phase separator with coupled cyclone and phase separation according to claim 1,
the tank body is arranged along the vertical direction, and a flow stabilizing column is arranged at the central axis of the tank body;
the swirler is arranged in the middle of the flow stabilizing column and a gap is reserved between the swirler and the tank body.
3. The cyclone and phase separation coupled high efficiency liquid-liquid two phase separator according to claim 1, wherein the liquid inlet pipe is disposed in the middle of the tank and connected to the middle upper portion of the cyclone; the light liquid outlet is arranged at the top of the tank body; the heavy liquid outlet is arranged at the bottom of the tank body, the bottom of the tank body is a conical end enclosure, and the cone angle is 30-150 degrees.
4. The high-efficiency liquid-liquid two-phase separator with coupled cyclone and phase separation as claimed in claim 1, wherein the cyclone is of a cylindrical or conical structure and comprises a liquid inlet, an overflow port and a bottom flow port, wherein the central axis of the cyclone is provided with the flow stabilizing column penetrating through the cyclone, the overflow port is arranged at the top of the cyclone, the bottom flow port is arranged at the bottom of the cyclone, and the liquid inlet is arranged at the middle upper part of the cyclone and is communicated with the liquid inlet pipe.
5. The high-efficiency liquid-liquid two-phase separator with coupled rotational flow and phase separation as claimed in claim 4, wherein the bottom outlet of the cyclone is provided with an inverted cone structure, the top surface of the cyclone is provided with the overflow port, the side wall of the cyclone is provided with the liquid inlet, and the bottom surface of the cyclone is provided with the underflow port.
6. The high efficiency liquid-liquid two phase separator with coupled cyclone and phase separation as claimed in claim 1, wherein the cyclone has an oil-water distribution box sleeved on the outer surface thereof, and the orifice plate type distribution box is disposed around the outer surface of the oil-water distribution box.
7. The cyclone and phase separation coupled high efficiency liquid-liquid two phase separator as claimed in claim 1, wherein the orifice plate type distribution box is divided into an upper separation zone and a lower separation zone by an intermediate partition plate, wherein the upper separation zone is communicated with the light liquid outlet, and the lower separation zone is communicated with the heavy liquid outlet.
8. A high efficiency liquid-liquid two phase separator with coupled cyclone and phase separation according to claim 1 wherein the orifice plate distribution box is sealed at the top by a baffle and is provided with openings at the sides and/or bottom.
9. The high-efficiency liquid-liquid two-phase separator with coupled rotational flow and phase separation according to claim 1, wherein the orifice-plate type distribution box is provided with a plurality of coalescence-separation layers, each coalescence-separation layer is provided with two or more coalescence-separation internal members, the coalescence-separation internal members are made by stamping steel plates or plastic plates with the thickness of 0.5mm or less, and are in the shapes of inclined plates, V-shaped or W-shaped, and the inclination angle is 15-75 degrees.
10. The high efficiency liquid-liquid two phase separator with coupled cyclone and phase separator according to claim 9, wherein a support plate is further disposed between two of said coalescing separation layers.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113769684A (en) * | 2021-08-24 | 2021-12-10 | 北京化工大学 | Supergravity device for efficient coupling and strengthening in liquid-liquid heterogeneous reaction and product two-phase separation process |
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Application publication date: 20201222 |