WO2009158253A1 - Dual body drum for rotary separators - Google Patents

Dual body drum for rotary separators Download PDF

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Publication number
WO2009158253A1
WO2009158253A1 PCT/US2009/047667 US2009047667W WO2009158253A1 WO 2009158253 A1 WO2009158253 A1 WO 2009158253A1 US 2009047667 W US2009047667 W US 2009047667W WO 2009158253 A1 WO2009158253 A1 WO 2009158253A1
Authority
WO
WIPO (PCT)
Prior art keywords
drum member
shaft
separator
passage
tubular body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2009/047667
Other languages
French (fr)
Inventor
William C. Maier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dresser Rand Co
Original Assignee
Dresser Rand Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dresser Rand Co filed Critical Dresser Rand Co
Priority to BRPI0913887A priority Critical patent/BRPI0913887A2/en
Publication of WO2009158253A1 publication Critical patent/WO2009158253A1/en
Anticipated expiration legal-status Critical
Priority to NO20110062A priority patent/NO20110062A1/en
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl

Definitions

  • Fluid separators are known and are generally used to separate a mixed flow (e.g., solids and fluids, liquids and gases, etc.) into different phases of fluid, fluids of varying density, and/or to separate solids from fluids
  • a mixed flow e.g., solids and fluids, liquids and gases, etc.
  • One type of rotary separator includes a generally tubular drum connected with a rotatable shaft such that a fluid passage is defined between the drum and shaft. Fluid is directed into the passage and contacts either the shaft outer surface or the drum inner surface. Du ⁇ ng such contact, liquid separates from the fluid flow, such that a substantially gaseous portion of the flow is directed for subsequent processing or use, and the liquid portions are directed for collection.
  • Embodiments of the disclosure may provide an exemplary separator including an inner drum member and an outer drum member.
  • the inner drum member has an inner drum inner surface and an inner drum outer surface and is disposed around a shaft such that a first flow passage is defined between the inner drum inner surface and the shaft, wherein the inner drum inner surface is configured to rotate around a central axis to separate liquids from a fluid flow contacting the inner drum inner surface.
  • the outer drum member has an outer drum inner surface and an outer drum outer surface and is disposed around the inner drum member such that a second flow passage is defined between the outer drum inner surface and the inner drum outer surface, wherein the second flow passage is substantially coaxial with the first flow passage, and wherein the outer drum inner surface is configured to rotate around the central axis to separate liquids from the fluid flow contacting the outer drum inner surface.
  • Embodiments of the disclosure may also provide an exemplary separator including a shaft rotatable about a central axis, an inner drum member and an outer drum member
  • the inner drum member is disposed around the shaft and spaced radially therefrom to define a first flow passage, wherein the inner drum member is configured to rotate with the shaft and to separate liquid from a first portion of a flow of fluid into the separator
  • the outer drum member is disposed around the inner drum member, and spaced radially therefrom to define a second flow passage coaxial with the first flow passage, wherein the outer drum member is configured rotate with the shaft and to separate liquid from a second portion of the flow of fluid into the separator
  • Embodiments of the disclosure may further provide an exemplary separator including a shaft rotatable around a central axis, a connector, an inner drum member, an outer drum member, an inner outlet passage, and an outer outlet passage.
  • the connector extends radially outward from the shaft.
  • the inner drum member has an inner central portion and a slot receiving the connector and coupled thereto such that the inner drum member rotates around the central axis with the shaft, and defines a first flow passage inside the inner drum member, wherein the first flow passage receives a first portion of a fluid flow through the separator
  • the outer drum member has an outer central portion, is connected to the second connector to rotate around the central axis with the shaft, and is disposed around inner drum member and radially spaced therefrom to define a second flow passage, wherein the second flow passage receives a second portion of the fluid flow through the separator.
  • the inner outlet passage extends radially through the inner drum member at the inner central portion, and is in fluid communication with the first and second flow passages, wherein the inner outlet passage is configured to direct liquid separated from the first portion of the fluid flow out of the first fluid passage and into the second fluid passage.
  • the outer outlet passage extends radially through the outer drum member at the outer central portion such that the outer outlet passage is located axially proximal to the inner outlet passage and is in fluid communication with the second flow passage, wherein the outer outlet passage is configured to direct liquid separated from at least one of the first and second portions of the fluid flow out of the second fluid passage.
  • Figure 1 illustrates a broken-away, perspective view of a cross-section through an exemplary embodiment of a separator including a drum in accordance with the disclosure.
  • Figure 2 illustrates an axial cross-sectional view of an exemplary embodiment of a drum in accordance with the disclosure.
  • Figure 3 illustrates an axial cross-sectional view of another exemplary embodiment of a drum in accordance with the disclosure.
  • Figure 4 illustrates a broken-away, enlarged perspective view of an axial cross-section through yet another exemplary embodiment of a drum in accordance with the disclosure.
  • Figure 5 illustrates a partial cross-sectional view of an exemplary embodiment of a separator indicating the fluid flow through the separator in accordance with the disclosure
  • first and second features are formed in direct contact
  • additional features may be formed interposing the first and second features, such that the first and second features may not be in direct contact
  • va ⁇ ous entities may refer to the same component by different names, and as such, the naming convention for the elements desc ⁇ bed herein is not intended to limit the scope of the invention, unless otherwise specifically defined herein Further, the naming convention used herein is not intended to distinguish between components that differ in name but not function Further, in the following discussion and in the claims, the terms “including” and “comprising” are used in an open-ended fashion, and thus should be interpreted to mean “including, but not limited to.” All numerical values in this disclosure may be exact or approximate values unless otherwise specifically stated. Accordingly, va ⁇ ous embodiments of the disclosure may deviate from the numbers, values, and ranges disclosed herein without departing from the intended scope.
  • FIG. 1 illustrates a separator assembly 11 including rotary separator 12 having a drum 10 and a shaft 14, which may both be rotatable about a central axis 15.
  • the drum 10 includes an inner drum member 20 and an outer drum member 22.
  • the inner drum member 20 may be disposed around the shaft 14, and the outer drum member 22 may be disposed around, and radially spaced apart from, the inner drum member 20.
  • the rotary separator 12 may include one or more additional outer drum members 22, with any additional outer drum members disposed either around the outer drum member 22 or inside the outer drum member 22, without departing from the scope of this disclosure.
  • the inner and outer drum members 20, 22 may be tubular, with the inner drum member 20 including an inner surface 24, and the outer drum member 22 including an inner surface 26 Additionally, the inner drum member 20 may be directly connected to the shaft 14, and the outer drum member 22 may be connected to the inner drum member 20, or also connected to the shaft 14, as desc ⁇ bed m further detail below Alternatively, the outer drum member 22 may be directly connected to the shaft 14, with the inner drum member 20 connected to the outer drum member 22 (structure not shown) In va ⁇ ous exemplary embodiments, the inner and outer drum members 20, 22 may be configured to connect with the shaft 14 and/or each other, and to rotate with the shaft 14, such that rotation of the shaft 14 rotates the inner and outer drum members 20, 22 about the central axis 15, for example, as a single unit [0016] The inner drum member 20 may be spaced radially apart from the shaft 14, such that a first flow passage 16 may be defined between inner surface 24 of the inner drum member 20 and a hub 18 attached to the shaft 14 It will be appreciated that in
  • the outer drum member 22 has an inner surface 26, and may be spaced radially outward from the inner drum member 20. As such, a second flow passage 30 may be defined between the inner surface 26 of the outer drum member 22 and the inner drum member 20. Accordingly, as the inner and outer drum members 20 and 22 may be disposed substantially coaxially, the second flow passage 30 may be substantially coaxial with the first flow passage 26. Furthermore, the inner drum member 20 may have axially spaced apart inner inlet and outlet ends 20a, 20b, defining the axial extents of the inner drum member 20. Similarly, the outer drum member 22 may have axially spaced apart outer inlet and outlet ends 22a, 22b.
  • an inner inlet 32 of the first flow passage 16 At the inner inlet end 20a, between the inner tubular body 20 and the hub 18, there may be defined an inner inlet 32 of the first flow passage 16. At the inner and outer inlet ends 20a, 22a, between the inner and outer tubular bodies 20, 22 there may be defined the outer mlet of the second flow passage 30. Similarly, at the inner and outer outlet ends 20b, 22b, the inner and outer outlets 36, 38 may be defined.
  • the inner inlet 32 may define the beginning of the first flow passage 26, and the outer inlet 34 may define the beginning of the second flow passage 30.
  • the collective area of the inner and outer inlets 32, 34 may define a rotary separator inlet.
  • inner and outer drum members 20, 22 are generally tubular, and therefore have substantially annular cross sections, they define annular first and second flow passages 26, 30, with annular inner and outer mlets and outlets 32-38. Additionally, depending on the number of additional outer drum members 22 present in the embodiment, if any, additional flow passages and inlets and outlets may also be defined, each adding to the rotary separator mlet and outlet.
  • the inner drum member 20 may have a central portion 20c defined between the outer mlet and outlet ends 20a, 20b, whereat at least one inner outlet passage 40, which may also be known as an inner outlet opening may be defined.
  • the outer drum member 22 may have a central portion 22c defined between the outer mlet and outlet ends 22a, 22b, whereat at least one outer outlet passage (or opening) 42 may be defined.
  • Each of the inner and outer outlet passages 40, 42 may extend radially outward through the inner and outer drum member 20, 22, respectively. It will be appreciated that the inner and outer outlet passages 40 and 42 may also, as shown, extend to an extent in the axial direction as desired to maximize efficiency.
  • the inner outlet passage 40 may be in fluid communication with the first and second flow passages 16, 30 and may be configured to discharge liquid out of the first flow passage 16 and into the second flow passage 30. Further, the liquid outlet passage 42 of the outer drum member 22 may be configured to discharge liquid through the outer drum member 22, away from the rotary separator 12, and to, for example, a static separator 100, which will be described m additional detail below.
  • FIG. 2 illustrates an exemplary embodiment of the drum 10, as described above with reference to Figure 1, additionally showing the inner and outer drum members 20, 22 constructed of two-pieces
  • the inner drum member may include first and second inner tubular bodies 50, 54
  • the outer drum member may include first and second outer tubular bodies 52, 56.
  • the first and second inner tubular bodes 50, 54 may being spaced axially apart to define the inner outlet passage 40
  • the first and second outer tubular bodies 52, 56 may be axially spaced apart to define the outer outlet passage 42
  • the inner and outer outlet passages 40, 42 are slots, however, other geometries are contemplated
  • first and second inner and outer tubular bodies 50, 52, 54, 56 may be relatively positioned such that the inner outlet passage 40 of the inner drum member 20 is located axially proximal to the outer outlet passage 42; therefore, despite the difference in radial locations, the axial locations of inner and outer outlet passages 40, 42 may be substantially similar, i e , axially proximal.
  • inlet sections 24a, 28a of the inner surfaces 22, 24, respectively maybe provided on the first inner and outer tubular sections 50, 52 and outlet sections 24b, 28b of the inner surfaces 24, 26 may be provided on the second inner and outer body sections 54, 56, respectively.
  • the mlet and outlet surface sections 24a, 24b, 28a, 28b may each be angled so as to direct liquids axially on the inner surface 24, 28 toward the inner and outer outlet passages 40, 42.
  • the inner drum member 20 may define an inner diameter Di bounded by the inner surface 24 and the outer drum member 22 may define an outer diameter D 0 bounded by the inner surface 26.
  • the diameters D r and D 0 may increase to, for example, a maximum proximal the inner and outer outlet passages 40, 42, respectively.
  • the inner and outer diameters Di and D 0 may reduce to mmimums at the axial extents of the inner and outer drum members 20, 22.
  • the inner diameter D 1 may define a minimum at one or both of the inner inlet and outlet ends 20a, 20b
  • the outer diameter D 0 may define a minimum at one or both of the outer inlet and outlet ends 22a, 22b.
  • the drum 10 may include one or more first connectors 60 extending between and connecting the first inner and outer body sections 50, 52 and one or more second connectors 62 extending between and connecting the second inner and outer tubular body sections 54, 56, so as to thereby couple the inner and outer drum members 20, 22.
  • the drum 10 includes a plurality of the first connectors 60 disposed adjacent to the inner and outer mlet ends 20a, 22a, and a plurality of the second connectors 62 disposed generally adjacent to the inner and outer outlet ends 20b, 22b, both pluralities of connectors 60, 62 being spaced circumferentially apart about the central axis 15 (as can be better appreciated from Figure 5).
  • the drum 10 may include third connectors 64 extending between and connecting the first inner tubular body 50 with the shaft 14, and fourth connectors 66 extending between and connecting the second inner tubular body 54 with the shaft 14, so as to thereby couple the inner and outer drum members 20, 22 with the shaft 14.
  • FIG. 3 illustrates another exemplary embodiment of the drum 10.
  • the inner and outer drum members 20, 22 are formed as one-piece bodies that are generally similar to the two- piece construction as described in detail above, with the following differences
  • the inner and outer outlet passages 40, 42 instead of being a slot between two spaced bodies, is one or more inner and outer openings or holes 70, 72.
  • the inner and outer openings 70, 72 may be spaced circumferentially about the central axis 15, thereby providing the inner and outer outlet passages 40, 42 (see Figures 1 and 2).
  • the drum 10 may also include one or more of each of the first, second, third and fourth connectors 60,
  • the first connectors 60 may be spaced circumferentially apart defining flow paths in between adjacent first connectors 60
  • the second- fourth connectors 62-66 may also be so arranged as described above with respect to Figure 2, the first-fourth connectors 60-64 connect the inner and outer drum members 20, 22 together, proximal to the inner and outer inlet and outlet ends 20a, 20b, 22a, 22b Accordingly, m the exemplary embodiment illustrated in Figure 3, the unitary inner and outer drum member 20, 22 may also be thereby connected together, and the inner drum member 20 thereby connected to the shaft 14
  • the drum 10 may instead include two sets of connectors: one set for coupling the inner and outer drum bodies 20, 22 together, and another set for coupling the inner drum member 20 (or outer drum member 22) with the shaft 14 (structure not shown).
  • FIG 4 illustrates another exemplary embodiment of the drum 10, wherein the inner and outer drum members 20, 22 are of one-piece construction, as desc ⁇ bed with reference to Figure 3
  • the outer drum member 22 is coupled with the shaft 14 by a plurality of connectors 80 extending radially from the shaft 14 to the inner drum member 22 and spaced circumferentially apart around the central axis 15.
  • the plurality of connectors 80 may be disposed adjacent to either the outer inlet end 22a (as shown) or the outer outlet end 22b.
  • the inner drum member 20 may be retrofitably connected with the plurality of connectors 80 so as to be disposed radially between the outer drum member 22 and the shaft 14.
  • the inner inlet end 20a (as shown), or the inner outlet end 20b, of the inner drum member 20 may have a plurality of slots 91 (only one shown) which each receives, and may be coupled to, a separate one of the plurality of connectors 80.
  • an existing one-piece drum may be retrofitted by adding the inner drum member 20 so as to form an exemplary embodiment of the drum 10 of the present disclosure.
  • the inner drum member 20 may also include one or more second connectors 82 (only one shown) which extend radially between the inner drum member 20, proximal the inner outlet end 22b, and the shaft 14 so as to connect the inner outlet end 22b with the shaft 14.
  • the outer drum member 22, proximal the outer outlet end 22b may be free of, or unconnected with, the shaft 14, but may alternatively be directly attached to the shaft 14 by one or more connectors 84.
  • the drum 10 may be advantageously employed in conjunction with a static separator 100 disposed around and spaced radially from the rotary separator 12
  • the static separator 100 may have a separation surface 102 extending around and spaced outwardly from the outer drum member 22.
  • a static separation passage 104 may be defined between the outer drum member 22 and the static separation surface 102, which may be fluidly coupled with the inner and outer inlets 32, 34 of the first and second flow passages 16, 30, respectively
  • FIG. 5 illustrates an exemplary operation of an exemplary embodiment of the drum 10 of the separator assembly 1 1
  • a fluid flow F may be directed into the separator assembly 1 1 , and may include one or more phases, such as liquid and gas, but may also include solids entrained in the fluid flow, or maybe a single phase flow of liquid or gas With any of these fluid flow F compositions, it maybe desireable to separate lower-density elements from the higher-density elements, for example, to separate gas from liquid
  • the fluid flow F may be directed through the static separation passage 104.
  • the separator assembly 1 1 may be configured to direct the fluid flow F such that it contacts the static separator 100 (i.e. swirl the fluid flow F), thereby employing the static separator 100 to begin the separation process [0029]
  • the fluid flow F may be directed through the inner and outer inlets 32, 34 of the first and second flow passages 16, 30, respectively.
  • the inner and outer drum members 20, 22 may be configured such that the inner inlet 32 receives a first portion f, of fluid flow F the outer inlet 34 receives a second, remainder portion f 2 of the fluid flow F.
  • the axial extent of the first and second passages 16, 30 may be substantially reduced in compa ⁇ son to a passage through a single drum (not shown) sized similarly to the outer drum member 22.
  • additional drum members i.e. the inner drum member 20 and any additional outer drum members (none shown)
  • increases the separating surface area per unit of axial length of the separator assembly 11 thereby potentially reducing the required axial extent of the separator assembly 11 and/or increasing the separator assembly 11 efficiency.
  • the inner drum member 20 may separate liquid L from the first portion f] of the fluid flow F.
  • the rotation of the inner drum member 20 draws the higher-density liquid radially outward to the inner drum member 20, due to the density differential and the centrifugal forces on the fluid.
  • the inner drum member 20 may be angled towards the inner outlet passage 40.
  • the liquid L having a centrifugal force exerted thereon by the rotation of the inner drum member 20, may be drawn to the inner outlet passage 40, and thereafter may be discharged therethrough and mto the second flow passage 30.
  • outer drum member 22 may be configured to separate liquid L from the second portion f 2 of the fluid flow F. As desc ⁇ bed above with reference to Figure 2, the outer drum member 22 may also be angled to draw the separated liquid L toward the outer outlet passage 42 The separated liquid L, which may be combined with any liquid L separated by the inner drum member 20 and discharged through the inner outlet passage 40, may then be discharged from the second flow passage 16 through the outer outlet passage 42
  • the outer drum member 22 may be configured to direct the separated liquid L radially out of the drum 10, and toward the static separator 100, as mentioned above with reference to Figure 1, but may alternatively direct the separated liquid L directly to a separate collector (not shown).
  • each of the above drum constructions has been described as configured to direct liquid L toward the radial and axial center of each of the inner and outer drum members 20 or 22, so as to be thereafter discharged through outlet passages 40, 42 (which may be inner and outer outlet openings 70, 72, as desc ⁇ bed), each of the inner and/or outer drum members 20 and/or 22 may alternatively be formed so as to direct liquid L toward either of the inner and outer inlets 32, 34, respectively, and/or the inner and outer outlets 36, 38, respectively.
  • either or both of the inner and outer drum members 20, 22 may be formed with the inner surfaces 24, 28 sloping toward either the inner and outer mlet ends 20a, 22a or the inner and outer outlet ends 20b, 22b.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Centrifugal Separators (AREA)

Abstract

A separator including a shaft rotatable about a central axis, an inner drum member and an outer drum member. The inner drum member is disposed around the shaft and spaced radially therefrom to define a first flow passage, wherein the inner drum member is configured to rotate with the shaft and to separate liquid from a first portion of a flow of fluid into the separator. The outer drum member is disposed around the inner drum member, and spaced radially therefrom to define a second flow passage coaxial with the first flow passage, wherein the outer drum member is configured rotate with the shaft and to separate liquid from a second portion of the flow of fluid into the separator.

Description

Dual Body Drum For Rotary Separators
Cross-Reference to Related Applications
[001] This application claims the benefit of the filing date of U S. utility patent application number 12/215,068, filed June 25, 2008, which is incorporated herein by reference to the extent it is not inconsistent with this disclosure.
Background
[002] Fluid separators are known and are generally used to separate a mixed flow (e.g., solids and fluids, liquids and gases, etc.) into different phases of fluid, fluids of varying density, and/or to separate solids from fluids One type of rotary separator includes a generally tubular drum connected with a rotatable shaft such that a fluid passage is defined between the drum and shaft. Fluid is directed into the passage and contacts either the shaft outer surface or the drum inner surface. Duπng such contact, liquid separates from the fluid flow, such that a substantially gaseous portion of the flow is directed for subsequent processing or use, and the liquid portions are directed for collection.
Summary
[003] Embodiments of the disclosure may provide an exemplary separator including an inner drum member and an outer drum member. The inner drum member has an inner drum inner surface and an inner drum outer surface and is disposed around a shaft such that a first flow passage is defined between the inner drum inner surface and the shaft, wherein the inner drum inner surface is configured to rotate around a central axis to separate liquids from a fluid flow contacting the inner drum inner surface. The outer drum member has an outer drum inner surface and an outer drum outer surface and is disposed around the inner drum member such that a second flow passage is defined between the outer drum inner surface and the inner drum outer surface, wherein the second flow passage is substantially coaxial with the first flow passage, and wherein the outer drum inner surface is configured to rotate around the central axis to separate liquids from the fluid flow contacting the outer drum inner surface.
[004] Embodiments of the disclosure may also provide an exemplary separator including a shaft rotatable about a central axis, an inner drum member and an outer drum member The inner drum member is disposed around the shaft and spaced radially therefrom to define a first flow passage, wherein the inner drum member is configured to rotate with the shaft and to separate liquid from a first portion of a flow of fluid into the separator The outer drum member is disposed around the inner drum member, and spaced radially therefrom to define a second flow passage coaxial with the first flow passage, wherein the outer drum member is configured rotate with the shaft and to separate liquid from a second portion of the flow of fluid into the separator
[005] Embodiments of the disclosure may further provide an exemplary separator including a shaft rotatable around a central axis, a connector, an inner drum member, an outer drum member, an inner outlet passage, and an outer outlet passage. The connector extends radially outward from the shaft. The inner drum member has an inner central portion and a slot receiving the connector and coupled thereto such that the inner drum member rotates around the central axis with the shaft, and defines a first flow passage inside the inner drum member, wherein the first flow passage receives a first portion of a fluid flow through the separator The outer drum member has an outer central portion, is connected to the second connector to rotate around the central axis with the shaft, and is disposed around inner drum member and radially spaced therefrom to define a second flow passage, wherein the second flow passage receives a second portion of the fluid flow through the separator. The inner outlet passage extends radially through the inner drum member at the inner central portion, and is in fluid communication with the first and second flow passages, wherein the inner outlet passage is configured to direct liquid separated from the first portion of the fluid flow out of the first fluid passage and into the second fluid passage. The outer outlet passage extends radially through the outer drum member at the outer central portion such that the outer outlet passage is located axially proximal to the inner outlet passage and is in fluid communication with the second flow passage, wherein the outer outlet passage is configured to direct liquid separated from at least one of the first and second portions of the fluid flow out of the second fluid passage.
Brief Description of the Drawings
[006] The present disclosure is best understood from the following detailed description when read with the accompanying Figures. It is emphasized that, m accordance with the standard practice in the industry, vaπous features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.
{007] Figure 1 illustrates a broken-away, perspective view of a cross-section through an exemplary embodiment of a separator including a drum in accordance with the disclosure.
[008] Figure 2 illustrates an axial cross-sectional view of an exemplary embodiment of a drum in accordance with the disclosure.
[009] Figure 3 illustrates an axial cross-sectional view of another exemplary embodiment of a drum in accordance with the disclosure.
[0010] Figure 4 illustrates a broken-away, enlarged perspective view of an axial cross-section through yet another exemplary embodiment of a drum in accordance with the disclosure.
[0011] Figure 5 illustrates a partial cross-sectional view of an exemplary embodiment of a separator indicating the fluid flow through the separator in accordance with the disclosure
Detailed Description
[0012] It is to be understood that the following disclosure describes several exemplary embodiments for implementing different features, structures, or functions of the invention. Exemplary embodiments of components, arrangements, and configurations are described below to simplify the present disclosure, however, these exemplary embodiments are provided merely as examples and are not intended to limit the scope of the invention Additionally, the present disclosure may repeat reference numerals and/or letters in the various exemplary embodiments and across the Figures provided herein This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various exemplary embodiments and/or configurations discussed in the various Figures Moreover, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed interposing the first and second features, such that the first and second features may not be in direct contact Finally, the exemplary embodiments presented below may be combined in any combination of ways, i e., any element from one exemplary embodiment may be used in any other exemplary embodiment, without departing from the scope of the disclosure.
[0013] Additionally, certain terms are used throughout the following descπption and claims to refer to particular components. As one skilled in the art will appreciate, vaπous entities may refer to the same component by different names, and as such, the naming convention for the elements descπbed herein is not intended to limit the scope of the invention, unless otherwise specifically defined herein Further, the naming convention used herein is not intended to distinguish between components that differ in name but not function Further, in the following discussion and in the claims, the terms "including" and "comprising" are used in an open-ended fashion, and thus should be interpreted to mean "including, but not limited to." All numerical values in this disclosure may be exact or approximate values unless otherwise specifically stated. Accordingly, vaπous embodiments of the disclosure may deviate from the numbers, values, and ranges disclosed herein without departing from the intended scope.
[0014] Figure 1 illustrates a separator assembly 11 including rotary separator 12 having a drum 10 and a shaft 14, which may both be rotatable about a central axis 15. In an exemplary embodiment, the drum 10 includes an inner drum member 20 and an outer drum member 22. The inner drum member 20 may be disposed around the shaft 14, and the outer drum member 22 may be disposed around, and radially spaced apart from, the inner drum member 20. Although not shown in the figures, it will be appreciated that in other exemplary embodiments, the rotary separator 12 may include one or more additional outer drum members 22, with any additional outer drum members disposed either around the outer drum member 22 or inside the outer drum member 22, without departing from the scope of this disclosure.
[0015] In an exemplary embodiment, the inner and outer drum members 20, 22 may be tubular, with the inner drum member 20 including an inner surface 24, and the outer drum member 22 including an inner surface 26 Additionally, the inner drum member 20 may be directly connected to the shaft 14, and the outer drum member 22 may be connected to the inner drum member 20, or also connected to the shaft 14, as descπbed m further detail below Alternatively, the outer drum member 22 may be directly connected to the shaft 14, with the inner drum member 20 connected to the outer drum member 22 (structure not shown) In vaπous exemplary embodiments, the inner and outer drum members 20, 22 may be configured to connect with the shaft 14 and/or each other, and to rotate with the shaft 14, such that rotation of the shaft 14 rotates the inner and outer drum members 20, 22 about the central axis 15, for example, as a single unit [0016] The inner drum member 20 may be spaced radially apart from the shaft 14, such that a first flow passage 16 may be defined between inner surface 24 of the inner drum member 20 and a hub 18 attached to the shaft 14 It will be appreciated that in other embodiments the hub 18 may be omitted, whereby the shaft 14 provides the radial inside boundary of the first flow passage 16.
[0017] The outer drum member 22 has an inner surface 26, and may be spaced radially outward from the inner drum member 20. As such, a second flow passage 30 may be defined between the inner surface 26 of the outer drum member 22 and the inner drum member 20. Accordingly, as the inner and outer drum members 20 and 22 may be disposed substantially coaxially, the second flow passage 30 may be substantially coaxial with the first flow passage 26. Furthermore, the inner drum member 20 may have axially spaced apart inner inlet and outlet ends 20a, 20b, defining the axial extents of the inner drum member 20. Similarly, the outer drum member 22 may have axially spaced apart outer inlet and outlet ends 22a, 22b. At the inner inlet end 20a, between the inner tubular body 20 and the hub 18, there may be defined an inner inlet 32 of the first flow passage 16. At the inner and outer inlet ends 20a, 22a, between the inner and outer tubular bodies 20, 22 there may be defined the outer mlet of the second flow passage 30. Similarly, at the inner and outer outlet ends 20b, 22b, the inner and outer outlets 36, 38 may be defined. The inner inlet 32 may define the beginning of the first flow passage 26, and the outer inlet 34 may define the beginning of the second flow passage 30. The collective area of the inner and outer inlets 32, 34 may define a rotary separator inlet. As the inner and outer drum members 20, 22 are generally tubular, and therefore have substantially annular cross sections, they define annular first and second flow passages 26, 30, with annular inner and outer mlets and outlets 32-38. Additionally, depending on the number of additional outer drum members 22 present in the embodiment, if any, additional flow passages and inlets and outlets may also be defined, each adding to the rotary separator mlet and outlet.
[0018] The inner drum member 20 may have a central portion 20c defined between the outer mlet and outlet ends 20a, 20b, whereat at least one inner outlet passage 40, which may also be known as an inner outlet opening may be defined. Similarly, the outer drum member 22 may have a central portion 22c defined between the outer mlet and outlet ends 22a, 22b, whereat at least one outer outlet passage (or opening) 42 may be defined. Each of the inner and outer outlet passages 40, 42 may extend radially outward through the inner and outer drum member 20, 22, respectively. It will be appreciated that the inner and outer outlet passages 40 and 42 may also, as shown, extend to an extent in the axial direction as desired to maximize efficiency. The inner outlet passage 40 may be in fluid communication with the first and second flow passages 16, 30 and may be configured to discharge liquid out of the first flow passage 16 and into the second flow passage 30. Further, the liquid outlet passage 42 of the outer drum member 22 may be configured to discharge liquid through the outer drum member 22, away from the rotary separator 12, and to, for example, a static separator 100, which will be described m additional detail below.
[0019] Figure 2 illustrates an exemplary embodiment of the drum 10, as described above with reference to Figure 1, additionally showing the inner and outer drum members 20, 22 constructed of two-pieces Specifically, the inner drum member may include first and second inner tubular bodies 50, 54, and the outer drum member may include first and second outer tubular bodies 52, 56. The first and second inner tubular bodes 50, 54 may being spaced axially apart to define the inner outlet passage 40, and the first and second outer tubular bodies 52, 56 may be axially spaced apart to define the outer outlet passage 42 Accordingly, in an exemplary embodiment, the inner and outer outlet passages 40, 42 are slots, however, other geometries are contemplated
[0020] Furthermore, the first and second inner and outer tubular bodies 50, 52, 54, 56 may be relatively positioned such that the inner outlet passage 40 of the inner drum member 20 is located axially proximal to the outer outlet passage 42; therefore, despite the difference in radial locations, the axial locations of inner and outer outlet passages 40, 42 may be substantially similar, i e , axially proximal. This axial proximity may facilitate the direction of the liquid discharged from the first fluid passage 16 into the second fluid passage 30 [0021] Additionally, inlet sections 24a, 28a of the inner surfaces 22, 24, respectively, maybe provided on the first inner and outer tubular sections 50, 52 and outlet sections 24b, 28b of the inner surfaces 24, 26 may be provided on the second inner and outer body sections 54, 56, respectively. In an exemplary embodiment, the mlet and outlet surface sections 24a, 24b, 28a, 28b may each be angled so as to direct liquids axially on the inner surface 24, 28 toward the inner and outer outlet passages 40, 42. Specifically, the inner drum member 20 may define an inner diameter Di bounded by the inner surface 24 and the outer drum member 22 may define an outer diameter D0 bounded by the inner surface 26. Accordingly, the diameters Dr and D0 may increase to, for example, a maximum proximal the inner and outer outlet passages 40, 42, respectively. Further, the inner and outer diameters Di and D0 may reduce to mmimums at the axial extents of the inner and outer drum members 20, 22. More particularly, the inner diameter D1 may define a minimum at one or both of the inner inlet and outlet ends 20a, 20b, and the outer diameter D0 may define a minimum at one or both of the outer inlet and outlet ends 22a, 22b.
[0022] Further, the drum 10 may include one or more first connectors 60 extending between and connecting the first inner and outer body sections 50, 52 and one or more second connectors 62 extending between and connecting the second inner and outer tubular body sections 54, 56, so as to thereby couple the inner and outer drum members 20, 22. In an exemplary embodiment, the drum 10 includes a plurality of the first connectors 60 disposed adjacent to the inner and outer mlet ends 20a, 22a, and a plurality of the second connectors 62 disposed generally adjacent to the inner and outer outlet ends 20b, 22b, both pluralities of connectors 60, 62 being spaced circumferentially apart about the central axis 15 (as can be better appreciated from Figure 5). Furthermore, in an exemplary embodiment, the drum 10 may include third connectors 64 extending between and connecting the first inner tubular body 50 with the shaft 14, and fourth connectors 66 extending between and connecting the second inner tubular body 54 with the shaft 14, so as to thereby couple the inner and outer drum members 20, 22 with the shaft 14.
[0023] Figure 3 illustrates another exemplary embodiment of the drum 10. In this exemplary embodiment, the inner and outer drum members 20, 22 are formed as one-piece bodies that are generally similar to the two- piece construction as described in detail above, with the following differences The inner and outer outlet passages 40, 42, instead of being a slot between two spaced bodies, is one or more inner and outer openings or holes 70, 72. The inner and outer openings 70, 72 may be spaced circumferentially about the central axis 15, thereby providing the inner and outer outlet passages 40, 42 (see Figures 1 and 2). [0024] The drum 10 may also include one or more of each of the first, second, third and fourth connectors 60,
62, 64, 66 For example, in an embodiment having multiple first connectors 60, the first connectors 60 may be spaced circumferentially apart defining flow paths in between adjacent first connectors 60 The second- fourth connectors 62-66 may also be so arranged As described above with respect to Figure 2, the first-fourth connectors 60-64 connect the inner and outer drum members 20, 22 together, proximal to the inner and outer inlet and outlet ends 20a, 20b, 22a, 22b Accordingly, m the exemplary embodiment illustrated in Figure 3, the unitary inner and outer drum member 20, 22 may also be thereby connected together, and the inner drum member 20 thereby connected to the shaft 14 However, although four connectors 60-66 are shown for coupling the inner and outer drum members 20, 22 and the inner drum member 20 with the shaft 14 are shown, the drum 10 may instead include two sets of connectors: one set for coupling the inner and outer drum bodies 20, 22 together, and another set for coupling the inner drum member 20 (or outer drum member 22) with the shaft 14 (structure not shown).
[0025] Figure 4 illustrates another exemplary embodiment of the drum 10, wherein the inner and outer drum members 20, 22 are of one-piece construction, as descπbed with reference to Figure 3 In the illustrated embodiment, the outer drum member 22 is coupled with the shaft 14 by a plurality of connectors 80 extending radially from the shaft 14 to the inner drum member 22 and spaced circumferentially apart around the central axis 15. The plurality of connectors 80 may be disposed adjacent to either the outer inlet end 22a (as shown) or the outer outlet end 22b. Further, the inner drum member 20 may be retrofitably connected with the plurality of connectors 80 so as to be disposed radially between the outer drum member 22 and the shaft 14. Specifically, the inner inlet end 20a (as shown), or the inner outlet end 20b, of the inner drum member 20 may have a plurality of slots 91 (only one shown) which each receives, and may be coupled to, a separate one of the plurality of connectors 80. Thus, an existing one-piece drum may be retrofitted by adding the inner drum member 20 so as to form an exemplary embodiment of the drum 10 of the present disclosure. [0026] Furthermore, the inner drum member 20 may also include one or more second connectors 82 (only one shown) which extend radially between the inner drum member 20, proximal the inner outlet end 22b, and the shaft 14 so as to connect the inner outlet end 22b with the shaft 14. The outer drum member 22, proximal the outer outlet end 22b may be free of, or unconnected with, the shaft 14, but may alternatively be directly attached to the shaft 14 by one or more connectors 84.
[0027] Referring once again to Figure 1 , in an exemplary embodiment, the drum 10 may be advantageously employed in conjunction with a static separator 100 disposed around and spaced radially from the rotary separator 12 The static separator 100 may have a separation surface 102 extending around and spaced outwardly from the outer drum member 22. Further, a static separation passage 104 may be defined between the outer drum member 22 and the static separation surface 102, which may be fluidly coupled with the inner and outer inlets 32, 34 of the first and second flow passages 16, 30, respectively
[0028] Figure 5 illustrates an exemplary operation of an exemplary embodiment of the drum 10 of the separator assembly 1 1 Initially, a fluid flow F may be directed into the separator assembly 1 1 , and may include one or more phases, such as liquid and gas, but may also include solids entrained in the fluid flow, or maybe a single phase flow of liquid or gas With any of these fluid flow F compositions, it maybe desireable to separate lower-density elements from the higher-density elements, for example, to separate gas from liquid
L. Accordingly, the fluid flow F may be directed through the static separation passage 104. The separator assembly 1 1 may be configured to direct the fluid flow F such that it contacts the static separator 100 (i.e. swirl the fluid flow F), thereby employing the static separator 100 to begin the separation process [0029] Once through the static separation passage 104, the fluid flow F may be directed through the inner and outer inlets 32, 34 of the first and second flow passages 16, 30, respectively. Accordingly, as the inner and outer drum members 20, 22 may be in a substantially coaxial arrangement, the inner and outer drum members 20, 22 may be configured such that the inner inlet 32 receives a first portion f, of fluid flow F the outer inlet 34 receives a second, remainder portion f2 of the fluid flow F.
[0030] By providing the inner and outer drum members 20, 22 and dividing the fluid flow F mto the first and second portions fl7 f2, the axial extent of the first and second passages 16, 30 may be substantially reduced in compaπson to a passage through a single drum (not shown) sized similarly to the outer drum member 22. The introduction of additional drum members (i.e. the inner drum member 20 and any additional outer drum members (none shown)) increases the separating surface area per unit of axial length of the separator assembly 11 , thereby potentially reducing the required axial extent of the separator assembly 11 and/or increasing the separator assembly 11 efficiency.
[0031] Accordingly, the inner drum member 20 may separate liquid L from the first portion f] of the fluid flow F. The rotation of the inner drum member 20 draws the higher-density liquid radially outward to the inner drum member 20, due to the density differential and the centrifugal forces on the fluid. In an exemplary embodiment, as descπbed above with reference to Figure 2, the inner drum member 20 may be angled towards the inner outlet passage 40. Thus, the liquid L, having a centrifugal force exerted thereon by the rotation of the inner drum member 20, may be drawn to the inner outlet passage 40, and thereafter may be discharged therethrough and mto the second flow passage 30.
[0032] Similarly, outer drum member 22 may be configured to separate liquid L from the second portion f2 of the fluid flow F. As descπbed above with reference to Figure 2, the outer drum member 22 may also be angled to draw the separated liquid L toward the outer outlet passage 42 The separated liquid L, which may be combined with any liquid L separated by the inner drum member 20 and discharged through the inner outlet passage 40, may then be discharged from the second flow passage 16 through the outer outlet passage 42
[0033] Further, the outer drum member 22 may be configured to direct the separated liquid L radially out of the drum 10, and toward the static separator 100, as mentioned above with reference to Figure 1, but may alternatively direct the separated liquid L directly to a separate collector (not shown). [0034] Although each of the above drum constructions has been described as configured to direct liquid L toward the radial and axial center of each of the inner and outer drum members 20 or 22, so as to be thereafter discharged through outlet passages 40, 42 (which may be inner and outer outlet openings 70, 72, as descπbed), each of the inner and/or outer drum members 20 and/or 22 may alternatively be formed so as to direct liquid L toward either of the inner and outer inlets 32, 34, respectively, and/or the inner and outer outlets 36, 38, respectively. As such, either or both of the inner and outer drum members 20, 22 may be formed with the inner surfaces 24, 28 sloping toward either the inner and outer mlet ends 20a, 22a or the inner and outer outlet ends 20b, 22b.
[0035] The foregoing has outlined features of several embodiments so that those skilled in the art may better understand the detailed description that follows. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions and alterations herein without departing from the spiπt and scope of the present disclosure.

Claims

ClaimsI claim:
1. A separator, comprising- an inner drum member having an inner drum inner surface and an inner drum outer surface and being disposed around a shaft such that a first flow passage is defined between the inner drum inner surface and the shaft, wherein the inner drum inner surface is configured to rotate around a central axis to separate liquids from a fluid flow contacting the inner drum inner surface; and an outer drum member having an outer drum inner surface and being disposed around the inner drum member such that a second flow passage is defined between the outer drum inner surface and the inner drum outer surface, wherein the second flow passage is substantially coaxial with the first flow passage, and wherein the outer drum inner surface is configured to rotate around the central axis to separate liquids from the fluid flow contacting the outer drum inner surface
2. The separator of claim 1, wherein: the first flow passage has an inner inlet, the second flow passage has an outer inlet disposed around the inner mlet; and the first flow passage is configured to receive a first portion of the fluid flow, and the second flow passage is configured to receive a second portion of the fluid flow.
3. The separator of claim 1 , wherein the inner drum member is configured to direct liquid contacting the inner drum member outward into the outer drum member.
4. The separator of claim 1, wherein: the inner drum member includes an inner inlet end, an inner outlet end, and an inner outlet passage extending radially through the inner drum member and located between the inner mlet end and the inner outlet end; the outer drum member includes an outer inlet end, an outer outlet end, and an outer outlet passage extending radially through the outer drum member and located between the outer inlet end and the outer outlet end; and the inner outlet passage of the inner drum member is configured discharge liquid radially outward toward the outer drum member, and the outer outlet passage of the outer drum member is configured to discharge liquid radially outward out of the outer drum member.
5 The separator of claim 4, further comprising' first connectors extending radially from the inner drum member to the outer drum member proximal the outer inlet end; second connectors extending radially from the inner drum member to the outer drum member proximal the outer outlet end; third connectors extending radially from the shaft to the inner drum member proximal the inner inlet end; and fourth connectors extending radially from the shaft to the inner drum member proximal the inner outlet end.
6. The separator of claim 1 , wherein the inner drum member is connected with the shaft, and the outer drum member is connected with the inner drum member, such that rotation of the shaft rotates both the inner and outer drum members around the central axis.
7. The separator of claim 1, wherein the outer drum member is connected to the shaft, and the inner drum member is connected to the outer drum member, such that rotation of the shaft rotates both the inner and the outer drum members around the central axis.
8. The separator of claim 1, wherein both of the inner and outer drum members are connected to the shaft, such that rotation of the shaft rotates the inner and outer drum members around the central axis.
9. The separator of claim 1, wherein the outer drum member is connected to the shaft by a plurality of connectors and the inner drum member is retrofitably connected with the plurality of connectors so as to be fixed radially between the outer drum member and the shaft.
10. The separator of claim 1, wherein the inner drum member includes a first inner tubular body and a second inner tubular body that is spaced axially apart from the first inner tubular body to define an inner outlet passage therebetween, wherein the inner outlet passage is configured to discharge liquid separated from the first portion of the fluid flow out to the outer drum member; and the outer drum member includes a first outer tubular body and a second outer tubular body that is spaced axially apart from the first outer tubular body to define an outer outlet passage therebetween, wherein the outer outlet passage is configured to discharge liquid separated from the second portion of the fluid flow out of the outer drum member.
11. The separator of claim 10, wherein the first inner tubular body is disposed at a first angle with respect to the central axis to direct liquid contacting the first inner tubular body toward the inner outlet passage.
12. The separator of claim 1 1, wherein the first outer tubular body is disposed at a second angle with respect to the central axis to direct liquid contacting the first outer tubular body toward the outer outlet passage.
13. The separator of claim 12, wherein: the second inner tubular body is disposed at a third angle to direct liquids contacting the second inner tubular body toward the inner outlet passage; and the second outer tubular body is disposed at a fourth angle to direct liquids contacting the second outer tubular body toward the outer outlet passage.
14. The separator of claim 10, wherein the inner and outer outlet passages are axially proximal.
15. The separator of claim 10, further compπsing: a first connector extending radially from the shaft and connecting to the first inner tubular body and the first outer tubular body; and a second connector extending radially from the shaft and connecting to the second inner tubular body and the second outer tubular body.
16. The separator of claim 1, further compπsing a static member with a separation surface disposed around and spaced radially apart from the outer drum member, wherein the outer drum member is configured to direct liquid radially outward to the static separation surface.
17. A separator, comprising: a shaft rotatable about a central axis an inner drum member disposed around the shaft and spaced radially therefrom to define a first flow passage, wherein the inner drum member is configured to rotate with the shaft and to separate liquid from a first portion of a flow of fluid into the separator; and an outer drum member being disposed around the inner drum member, and spaced radially therefrom to define a second flow passage coaxial with the first flow passage, wherein the outer drum member is configured rotate with the shaft and to separate liquid from a second portion of the flow of fluid into the separator.
18. The separator of claim 17, further comprising: first connectors extending outward from the shaft and connecting to the inner drum member such that the inner drum member rotates with the shaft; second connectors extending outward from the inner drum member and connecting to the outer drum member such that the outer drum member rotates with the shaft
19 The separator as recited in claim 17, further compπsing first connectors extending outward from the shaft and connecting to the outer drum member and retrofitably connecting to the inner drum member, such that the inner and outer drum members rotate with the shaft.
20. A separator, compπsing: a shaft rotatable around a central axis; a connector extending radially outward from the shaft; an inner drum member having an inner central portion and a slot receiving the connector and coupled thereto such that the inner drum member rotates around the central axis with the shaft, and defining a first flow passage therein, wherein the first flow passage receives a first portion of a fluid flow through the separator, an outer drum member having an outer central portion, connected to the second connector to rotate around the central axis with the shaft, and disposed around inner drum member and radially spaced therefrom to define a second flow passage, wherein the second flow passage receives a second portion of the fluid flow through the separator, and an inner outlet passage extending radially through the inner drum member at the inner central portion, in fluid communication with the first and second flow passages, wherein the inner outlet passage is configured to direct liquid separated from the first portion of the fluid flow out of the first fluid passage and into the second fluid passage; and an outer outlet passage extending radially through the outer drum member at the outer central portion such that the outer outlet passage is located axially proximal to the inner outlet passage, and m fluid communication with the second flow passage, wherein the outer outlet passage is configured to direct liquid separated from at least one of the first and second portions of the fluid flow out of the second fluid passage.
PCT/US2009/047667 2008-06-25 2009-06-17 Dual body drum for rotary separators Ceased WO2009158253A1 (en)

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NO20110062A NO20110062A1 (en) 2008-06-25 2011-01-13 Two-piece body for rotor separators

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US12/215,068 2008-06-25

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US8062400B2 (en) 2011-11-22

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