A liquid vapor separation device of a fractionation column

Abstract

Present disclosure relates to a liquid vapor separation device (100) of a fractionation column (FC). The device includes a first plate (10), a second plate (20), an impingement plate (30), and a plurality of vanes (40). The second plate may be positioned below the first plate at a distance. The impingement plate may be positioned between and coupled to the first plate and the second plate. The impingement plate extends to a predefined length along length of the first plate (10) and the second plate (20). Further, the plurality of vanes (40) may be positioned between and coupled to the first plate and the second plate along adjacent sides of the impingement plate and spaced apart by a pre-defined distance. Furthermore, each vane of the plurality of vanes may be defined with a curved section (40b) and a twisted section (40a) extending from the curved section and may be adapted to separate vapor and liquid from the liquid vapor mixture.

Description

A LIQUID VAPOR SEPARATION DEVICE OF A FRACTIONATION COLUMNTECHNICAL FIELD

[0001] Present disclosure relates to process devices. Particularly, the present disclosure relates to a liquid vapor separation device of a fractionation column that effectively separates liquid and vapors from a liquid vapor mixture.BACKGROUND OF THE DISCLOSURE

[0002] In refineries, fractionation columns are generally utilized to separate subproducts from the crude oil through a distillation process. The fractionation columns may be categorized into different categories such as Crude distillation unit (CDU) and Vacuum Distillation Unit (VDU). The crude oil is extracted from the ground in raw form. The crude oil is first supplied to the CDU for separating light sub -products from the crude oil. After separation of the light sub-products, the heavy residual oil remains at the bottom of the CDU which further supplies to the VDU for further separation of the sub-products. Before the entry of the residual oil into the VDU, the heating zones are provided to heat the residual oil in order to convert the residual oil into vapors. Through heating, a major portion of residual oil converts into vapors and the remaining portion of the residual oil remains the same. Thus, a mixture of oil and vapors enters into the VDU.

[0003] Typically, in VDU, a plurality of zones are defined for the distillation process. Out of these zones, a flash zone is defined where the oil and vapors separate from the mixture of oil and vapors. The flash zone is often located close to an inlet from where the mixture of oil and vapors enter into the VDU. Conventionally, a plurality of plates are positioned close to the inlet and arranged within the flash zone at an angle to separate the oil and vapors from the mixture of oil and vapors. However, the separation of the oil and vapors through such conventional arrangements of plates is ineffective, thereby, the vapors along with oil droplets supply to other zones of the VDU which declines the overall performance of the VDU. Further, the pressure drop of the mixture of oil and vapors is high, when the mixture of oil and vapors strikes the plates of the conventional separation device. Furthermore, the distribution of the vapors separated from the oil within the VDU is improper, which is undesired.

[0004] The present disclosure is directed to overcome one or more limitations stated above or any other limitations associated with the prior art.

[0005] The drawbacks / difficulties / disadvantages / limitations of the conventional techniques explained in the background section are just for exemplary purposes and the disclosure would never limit its scope only such limitations. A person skilled in the art would understand that this disclosure and below mentioned description may also solve other problems or overcome the other drawbacks / disadvantages of the conventional arts which are not explicitly captured above.SUMMARY OF THE DISCLOSURE

[0006] The one or more shortcomings of the prior art are overcome by the configuration of a liquid vapor separation device as claimed, and additional advantages are provided through the provision of the liquid vapor separation device of a fractionation column as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.

[0007] In one non-limiting embodiment of the present disclosure, a liquid vapor separation device of a fractionation column is disclosed. The liquid vapor separation device includes a first plate, a second plate, an impingement plate, and a plurality of vanes. The second plate may be positioned below the first plate at a distance. The impingement plate may be positioned between and coupled to the first plate and the second plate. The impingement plate extends to a predefined length along a length of the first plate and the second plate and may be configured to receive and split a liquid vapor mixture into two flow paths. Further, the plurality of vanes may be positioned between and coupled to the first plate and the second plate along adjacent sides of the impingement plate and spaced apart by a pre-defined distance. Furthermore, each vane of the plurality of vanes may be defined with a curved section and a twisted section extending from the curved section and may be adapted to separate vapor and liquid from the liquid vapor mixture.

[0008] In an embodiment of the present disclosure, the impingement plate includes a split portion, an elongated portion, and deflecting portions. The split portion may be positioned at a substantially central portion of the elongated portion and the deflecting portions extend on either side of the elongated portion to divert the received liquid vapor mixture towards the plurality of vanes.

[0009] In an embodiment of the present disclosure, the split portion of the impingement plate may have V-shaped profile, wherein the V-shaped profile defines an angle relative to the elongated portion.

[0010] In an embodiment of the present disclosure, each deflecting portion may be defined with a curved part and a twisted part extending from the curved part at an angle with respect to the curved part.

[0011] In an embodiment of the present disclosure, the impingement plate may be a unitary structure.

[0012] In an embodiment of the present disclosure, the twisted section of each vane of the plurality of vanes forms an angle ranging between 14 and 16 relatives to the curved section.

[0013] In an embodiment of the present disclosure, each vane of the plurality of vanes may be defined with a hook section at an end to be engaged with one or more provisions defined with the first plate and the second plate.

[0014] In an embodiment of the present disclosure, the second plate may be defined with first slots and second slots to drain the liquid separated from the liquid vapor mixture.

[0015] In a non-limiting embodiment of the present disclosure, a fractionation column may be disclosed. The fractionation column includes a housing, an inlet, and a liquid vapor separator device. The housing may be defined with a plurality of zones. The inlet may be defined within the housing at one zone of the plurality of zones. The inlet may be configured to receive and guide a liquid vapor mixture into the housing. The liquidvapor separator device may be positioned at one zone of the plurality of zones and adjacent to the inlet. The liquid vapor separation device includes a first plate and asecond plate, an impingement plate, and a plurality of vanes. The first plate and the second plate may be positioned below the first plate at a distance. The impingement plate may be positioned between and coupled to the first plate and the second plate. The impingement plate extends to a predefined length along length of the first plate and the second plate and configured to receive and split a liquid vapor mixture into two flow paths. Further, the plurality of vanes may be positioned between and coupled to the first plate and the second plate along adjacent sides of the impingement plate and spaced apart by a pre-defined distance. Furthermore, each vane of the plurality of vanes may be defined with a curved section and a twisted section extending from the curved section and may be adapted to separate vapor and liquid from the liquid vapor mixture.

[0016] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure.

[0017] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

[0018] The novel features and characteristics of the disclosure are set forth in the description. The disclosure itself, however, as well as a preferred mode of use, further objectives, and advantages thereof, will best be understood by reference to the following description of an illustrative embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which:

[0019] Figure 1 illustrates a perspective view of a fractionation column, according to an embodiment of the present disclosure,

[0020] Figure 2 illustrates a top and cut-sectional view of a liquid vapor separation device of the fractionation column in Figure 1,

[0021] Figure 3 illustrates a top view of a first plate of the liquid vapor separation device of Figure 2,

[0022] Figure 4 illustrates a top view of a second plate of the liquid vapor separation device of Figure 2,

[0023] Figure 5 illustrates a perspective view of an impingement plate of the liquid vapor separation device of Figure 2, and

[0024] Figure 6 illustrates a perspective view of a vane of the liquid vapor separation device of Figure 2.

[0025] Skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the drawings may be exaggerated relative to other elements to help to improve understanding of embodiments of the present disclosure.DETAILED DESCRIPTION

[0026] While the disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in Figures 1-6 and will be described in detail below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure as defined by the appended claims.

[0027] Before describing detailed embodiments, the novelty and inventive step that are in accordance with the present disclosure reside in a liquid vapor separation device of a fractionation column. It is to be noted that a person skilled in the art can be motivated by the present disclosure and modification of the liquid vapor separation device and the fractionation column. However, such modification should be construed within thescope of the present disclosure. Accordingly, the drawings show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.

[0028] In the present disclosure, the term “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment or implementation of the present subject matter described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0029] The terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusions, such that a device that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such device. In other words, one or more elements in a device proceeded by “comprises... a” does not, without more constraints, preclude the existence of other elements or additional elements in the device.

[0030] The terms like “at least one” and “one or more” may be used interchangeably or in combination throughout the description.

[0031] Reference will now be made to the exemplary embodiments of the disclosure, as illustrated in the accompanying drawings. Wherever possible, the same numerals will be used to refer to the same or like parts. Embodiments of the disclosure are described in the following paragraphs with reference to Figures 1-6. In Figures 1-6, the same elements or elements that have the same functions are indicated by the same reference signs.

[0032] Referring to Figure 1, which illustrates a perspective view of a fractionation column (FC). The fractionation columns (FC) may be utilized in process industries like refineries, petrochemical industries, etc. for separating the sub-products from the crude oil. The fractionation columns (FC) may be categorized into different categories, for example, crude distillation column, vacuum distillation column, etc. Each fractionation column (FC) may have an upright structure which extends upwardly from a ground surface. The fractionation column (FC) includes a housing (H). The housing (H) may have a long cylindrical shape that may be vertically oriented on the ground surface. Thehousing (H) may be defined with a plurality of zones. Each zone of the plurality of zones may be divided and located based on its functionality. For example, a flash zone (FZ) of the plurality of zones may be located at a place where the mixture of liquid and vapors may be received in the housing (H) and separate the liquid and vapors from the received mixture of liquid and vapors.

[0033] The fractionation column (FC) includes an inlet (IN) which may be formed at a side wall of the housing (H). The inlet (IN) may be coupled to a fluid source (not shown in Figures) and located at the flash zone (FZ) of the plurality of zones. The inlet (IN) may be configured to receive a mixture of liquid and vapors in the housing (H). The liquid of the mixture of liquid and vapors may be a residual oil. Alternatively, the liquid of the mixture of liquid and vapors may be crude oil or any type of oil other than the residual oil, without limiting the scope of the present disclosure. The inlet (IN) may be defined with a tubular portion that may be configured to guide the mixture of liquid and vapors to flow in a direction perpendicular to the center of the housing (H).

[0034] Referring further to Figure 1, the fractionation column (FC) includes a liquid vapor separator device (100). The liquid vapor separator device (100) may be hereinafter referred to as a device (100). The device (100) may be placed in the flash zone (FZ) and adjacent to the inlet (IN) such that, the device (100) may receive a mixture of liquid and vapors from the inlet (IN). The device (100) may be placed in the flash zone (FZ) by coupling to portion of an inner surface of the housing (H) by means of a welding process. Alternatively, the device (100) may be coupled to the inner surface of the housing (H) through fasteners.

[0035] The device (100) may further include a first plate (10) [best seen in Figure. 3] and a second plate (20) [best seen in Figure. 4], At least one of the first plate (10) and the second plate (20) may be coupled to the housing (H). Each of the first plate (10) and the second plate (20) may be oriented horizontally such that the first plate (10) and the second plate (20) extend transversely relative to a side wall of the housing (H). The second plate (20) may be positioned below the first plate (10) at a distance, as shown in Figure 1. Each plate of the first and second plate (20)s may have a C-shape. Alternatively, the first and second plate (20)s may have different shapes other than C- shape, without limiting the scope of the present disclosure.

[0036] Referring again to Figure 1, the device (100) includes an impingement plate (30). The impingement plate (30) may be positioned between the first plate (10) and the second plate (20). The impingement plate (30) may be coupled to the first plate (10) and the second plate (20). The impingement plate (30) may be located adjacent to the inlet (IN) such that the impingement plate (30) receives the maximum volume of the mixture of liquid and vapors. The impingement plate (30) extends to a predefined length along a length of the first plate (10) and the second plate (20), as shown in Figure 2. The extension of the impingement plate (30) aids in providing direction to the flow of the received mixture of the liquid and vapors.

[0037] Referring to Figure 5, the impingement plate (30) includes a split portion (30a), an elongated portion (30b), and deflecting portions (30c). The split portion (30a) may be positioned at a substantially central portion of the elongated portion (30b). The split portion (30a) may be configured to receive the mixture of liquid and vapors and split the received mixture of liquid and vapors into two flow paths. The splitting of the received mixture of liquid and vapors into two flow paths prevents occurrence of the turbulence within the received liquid and vapors and which aids in maximizing the separation of the liquid and vapors from the received mixture of liquid and vapors.

[0038] In an embodiment, the split portion (30a) of the impingement plate (30) may have a V-shaped profile where the V-shaped profile defines an angle relative to the elongated portion (30b). Alternatively, the split portion (30a) of the impingement plate (30) may have different profiles other than the V-shaped profile, without limiting the scope of the present disclosure. The elongated portion extends (30b) on either side of the split portion (30a) such that the elongated portion (30b) defines the two flow paths where the mixture of liquid and vapors flow after splitting through the split portion (30a).

[0039] Referring further to Figure 5, the deflecting portions (30c) extend on either side of the elongated portion (30b). The deflecting portions (30c) may be configured to receive the mixture of liquid and vapors from the elongated portion (30b) and divert the received mixture of liquid and vapor mixture towards behind the impingement plate (30). The diversion of the received mixture of liquid and vapor mixture ensures flowingof the received liquid and vapors into circular paths without lacking the pressure of the received liquid and vapors. In an embodiment, each deflecting portion (30c) may be defined with a curved part (30ca) and a twisted part (30cb). The twisted part (30cb) extends from the curved part (30ca) at an angle with respect to the curved part (30ca). The combination of the curved part (30ca) and the twisted part (30cb) aids in maintaining the pressure of the flow of the mixture of the liquid and vapors. In an embodiment, the impingement plate (30) may be a unitary structure.

[0040] Referring now to Figure 2, the device (100) includes a plurality of vanes (40). The plurality of vanes (40) may be positioned between the first plate (10) and the second plate (20). The plurality of vanes (40) may be placed along adjacent sides of the impingement plate (30) such that the plurality of vanes (40) receives the maximum portion of the mixture of liquid and vapors diverted by the deflecting portions (30c) of the impingement plate (30). The plurality of vanes (40) may be oriented such that the plurality of vanes (40) may be spaced apart by a pre-defined distance. The predefined distance may be referred to a distance between each two consecutive vanes (40). The predefined distance among the plurality of vanes (40) may be uniform. The positioning of the vanes (40) aids in the effective distribution of the vapors separated from the mixture of liquid and vapor in the fractionation column (FC).

[0041] As apparent from Figure 6, each vane of the plurality of vanes (40) may be defined with a curved section (40b), and a twisted section (40a). The twisted section (40a) extends from the curved section (40b). In an embodiment, the twisted section (40a) of each vane of the plurality of vanes (40) forms an angle ranging between 14 and 16 relatives to the curved section (40b). Each vane may be oriented such that the curved section (40b) receives the maximum volume of the mixture of liquid and vapor. The received mixture of liquid and vapors flows the surface of the vane from the curved section (40b) towards the twisted section (40a). The twisted section (40a) may have a shape such that the received liquid vapor mixture turns down, thereby the liquid content of the liquid vapor mixture falls on the second plate (20) due to having high density and the vapors rise upwardly due to having low density via a cutout formed at a central portion of the first plate (10) towards the other zones of the fractionation column (FC). Accordingly, this configuration of the device (100) effectively separates liquid and vapors from the mixture of liquid and vapor.

[0042] In an embodiment, the second plate (20) may be defined with first slots (50) and second slots (60), as shown in Figure 4. The first slots (50) may be located proximally to the position of the impingement plate (30). The first slots (50) may be configured to drain the liquid separated by striking the mixture of liquid and vapors on the impingement plate (30). The second slots (60) may be located proximally to the position of the plurality of vanes (40). The second slots (60) may be configured to drain the liquid separated by striking the mixture of liquid and vapors on the plurality of vanes (40). In an embodiment, each vane of the plurality of vanes (40) may be defined with a hook section (40c), as shown in Figure 6. The hook section (40c) may be located at an end of each vane. The hook section (40c) may be configured to be engaged with one or more provisions defined with the first plate (10) and the second plate (20).

[0043] In an operational embodiment, the mixture of liquid and vapors enters into the fractionation column (FC) through the inlet (IN) and strikes the split portion (30a) of the impingement plate (30). After striking the split portion (30a), the mixture of liquid and vapors splits into two parts, flows on two different flow paths, for example, left side, and right side, over the elongated portion (30b) of the impingement plate (30) towards the deflecting portions (30c) of the impingement plate (30). Subsequently, the mixture of liquid and vapors received from the elongated portion (30b) diverts by deflecting portions (30c) towards the plurality of vanes (40). Then, the diverted mixture of liquid and vapors strikes the curved portions of the plurality of vanes (40) and flows towards the twisted portions of the plurality of vanes (40). The mixture of liquid and vapor flows turns down when flowing on the twisted portions of the impingement plate (30), thereby the liquid falls down due to having high density and the vapors rise upwardly due to having low density. The liquid may exit from the holes formed on the second plate (20) and the vapors move towards other zones of the plurality of zones through the cutout formed at the central portion of the first plate (10). The process of splitting the received liquid and vapors aids in preventing turbulence during the flow of the received liquid and vapors within the device and also splitting the received liquid and vapors into two parts aids in separating the liquid and vapor from the received liquid and vapors in quick manner. Further, the process of diverting the received liquid and vapors ensures flowing the received mixture of the liquid and vapor towards the plurality of vanes (40) so that the maximum volume of the received mixture of liquidand vapor may strike the plurality of vanes (40). The process of twisting the received mixture of liquid and vapors due to the configuration of each vane (40) ensures maximizing the separation of the liquid and vapors from the received mixture of liquid and vapors. Accordingly, this configuration of the device (100) effectively separates liquid and vapors from the mixture of liquid and vapor.

[0044] In accordance with the present disclosure, the device (100), as explained in the above paragraphs, effectively separates the liquid and vapors from the mixture of liquid and vapors. Further, the device (100) of the present disclosure distributes the vapors within the fractionation column (FC) uniformly. Further, the device (100) of the present disclosure maintains the pressure of the vapors separated from the mixture of liquid and vapors. Further, the device (100) of the present disclosure is simple, compact, and easy to manufacture. Furthermore, the device (100) of the present disclosure eliminates the requirements of the additional devices to maintain the pressure of vapors and accordingly saves energy and makes the operation of separating the liquid and vapors economical.

[0045] The various embodiments of the present disclosure have been described above with reference to the accompanying drawings. The present disclosure is not limited to the illustrated embodiments; rather, these embodiments are intended to fully and completely disclose the subject matter of the disclosure to those skilled in this art. In the drawings, like numbers refer to like elements throughout. The thicknesses and dimensions of some components may be exaggerated for clarity.

[0046] LIST OF REFERENCE NUMERALS

[0047] EQUIVALENTS:The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the description.Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge,readily modify and / or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the embodiments as described herein. Any discussion of documents, acts, materials, devices, articles and the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application. The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher / lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.

Claims

We Claim:

1. A liquid vapor separation device (100) of a fractionation column (FC), the liquid vapor separation device (100) comprising: a first plate (10) and a second plate (20) positioned below the first plate (10) at a distance; an impingement plate (30) positioned between and coupled to the first plate (10) and the second plate (20), the impingement plate (30) extends to a predefined length along a length of the first plate (10) and the second plate (20), and configured to receive and split a liquid vapor mixture into two flow paths; and a plurality of vanes (40) positioned between and coupled to the first plate (10) and the second plate (20) along adjacent sides of the impingement plate (30), and spaced apart by a pre-defined distance, wherein each vane of the plurality of vanes (40) is defined with a curved section (40b) and a twisted section (40a) extending from the curved section (40b) and is adapted to separate vapor and liquid from the liquid vapor mixture.

2. The liquid vapor separation device (100) as claimed in claim 1, wherein the impingement plate (30) comprises a split portion (30a), an elongated portion (30b), and deflecting portions (30c), wherein the split portion (30a) is positioned at a substantially central portion of the elongated portion (30b) and the deflecting portions (30c) extend on either side of the elongated portion (30b) to divert the received liquid vapor mixture towards the plurality of vanes (40).

3. The liquid vapor separation device (100) as claimed in claim 1, wherein the split portion (30a) of the impingement plate (30) has V-shaped profile, wherein the V-shaped profile defines an angle relative to the elongated portion (30b).

4. The liquid vapor separation device (100) as claimed in claim 2, wherein each deflecting portion (30c) is defined with a curved part (30ca) and a twisted part (30cb) extending from the curved part (3 Oca) at an angle with respect to the curved part (3 Oca).

5. The liquid vapor separation device (100) as claimed in claim 1, wherein the impingement plate (30) is a unitary structure.

6. The liquid vapor separation device (100) as claimed in claim 1, wherein the twisted section (40a) of each vane of the plurality of vanes (40) forms an angle ranging between 14 and 16 relatives to the curved section (40b).

7. The liquid vapor separation device (100) as claimed in claim 1, wherein each vane of the plurality of vanes (40) is defined with a hook section (40c) at an end to be engaged with one or more provisions defined with the first plate (10) and the second plate (20).

8. The liquid vapor separation device (100) as claimed in claim 1, wherein the second plate (20) is defined with first slots (50) and second slots (60) to drain the liquid separated from the liquid vapor mixture.

9. A fractionation column (FC) comprising: a housing (H) defined with a plurality of zones; an inlet (IN) defined within the housing (H) at one zone of the plurality of zones, the inlet (IN) is configured to receive and guide a liquid vapor mixture into the housing (H); and a liquid vapor separator device (100) positioned at one zone of the plurality of zones and adjacent to the inlet (IN), the liquid vapor separation device (100) comprising: a first plate (10) and a second plate (20) positioned below the first plate (10) at a distance; an impingement plate (30) positioned between and coupled to the first plate (10) and the second plate (20), the impingement plate (30) extends to a predefined length along a length of the first plate (10) and the second plate (20), and configured to receive and split a liquid vapor mixture into two flow paths; and a plurality of vanes (40) positioned between and coupled to the first plate (10) and the second plate (20) along adjacent sides of the impingement plate (30), and spaced apart by a pre-defined distance,wherein each vane of the plurality of vanes (40) is defined with a curved section (40b) and a twisted section (40a) extending from the curved section (40b) and is adapted to separate vapor and liquid from the liquid vapor mixture.

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