WO2000065269A1 - Dispositif de commande d'ecoulement de fluide dans l'espace annulaire de joints telescopiques et utilisation de celui-ci - Google Patents

Dispositif de commande d'ecoulement de fluide dans l'espace annulaire de joints telescopiques et utilisation de celui-ci Download PDF

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Publication number
WO2000065269A1
WO2000065269A1 PCT/BR2000/000030 BR0000030W WO0065269A1 WO 2000065269 A1 WO2000065269 A1 WO 2000065269A1 BR 0000030 W BR0000030 W BR 0000030W WO 0065269 A1 WO0065269 A1 WO 0065269A1
Authority
WO
WIPO (PCT)
Prior art keywords
telescopic joint
sliding ring
pipe
joint according
chamber
Prior art date
Application number
PCT/BR2000/000030
Other languages
English (en)
Inventor
Eduardo Cardoso De Melo Guerra
Patrício NELSON, Jr.
Original Assignee
Petróleo Brasileiro S.A.-Petrobras
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 Petróleo Brasileiro S.A.-Petrobras filed Critical Petróleo Brasileiro S.A.-Petrobras
Publication of WO2000065269A1 publication Critical patent/WO2000065269A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement

Definitions

  • the present invention relates to a telescopic joint for the control of the flow of fluid in the annular space within the telescopic joint, and more specifically to a device placed in the annular space between the interconnecting pipes of a telescopic joint so as to promote, a desirable and controllable flow rate of fluid through that space while allowing the relative movement due to differential displacements.
  • a telescopic joint for the control of the flow of fluid in the annular space within the telescopic joint, and more specifically to a device placed in the annular space between the interconnecting pipes of a telescopic joint so as to promote, a desirable and controllable flow rate of fluid through that space while allowing the relative movement due to differential displacements.
  • the main feature of a telescopic joint is that an annular space is formed between the pipes which make up said joint, the pipes being concentric or not, said joint besides allowing the necessary accommodation due to differential displacements, admitting the passage of the fluids required for the balance of pressures.
  • a cyclone as a separating device is quite usual in the field of quick separation of gas-solid suspensions.
  • the fluid catalytic cracking unit uses several sets of cyclones for separating the catalyst (a very fine grain size) from gases and vapors.
  • a first set, or stage, of cyclones, placed in the interior of the disengager vessel, is normally connected directly either to the exit of the reaction zone or to the feeding zone.
  • another set of cyclones is linked in series to the cyclones of the reaction zone or feeding zone through a connecting pipe.
  • a telescopic joint is formed at the link between two cyclone pipes: one pipe exiting one cyclone and a second pipe entering another cyclone.
  • refiners seek for increasing efficiency in the cyclone separation and retention ability.
  • US patent 4,502,947 teaches that a more efficient and quick separation of the catalyst and the reaction products in the FCC unit may be obtained by using a cyclone separator which is directly linked to both the end of the reaction zone (riser) and the cyclones of the first and second stage.
  • Purge and stripping vapors flow through the annular space between the concentric pipes together with some entrained catalyst. It is suggested to use several kinds of packings in the interior of the annular section for the mounting of the concentric pipes, so as to preserve some space for the passage of vapors.
  • packings in the interior of the annular section may constitute a source of problems for the refiner, since such packings may favor the piling up of catalyst, causing plugging and requiring more frequent, undesirable maintenance work.
  • the present invention provides a device for control of the flow rate of fluids in the annular space between the connecting pipes of a telescopic joint, the pipes being concentric or not, the device securing an optimized flow rate of fluids for maintaining the pressure differential while allowing the structure differential displacements typical of hydraulic systems for the flow of fluids in order to secure an annular section having the desired spacing and pressure drop in the connecting area of the connecting pipes, without structurally impairing the accommodation of the differential displacements.
  • Such a telescopic joint can be used for the flow rate control of fluids in the annular space of connecting pipes of converter cyclones in fluid catalytic cracking units (FCC), by using a sliding ring in the telescopic joint, so as to ensure that there will be a constant area for gas passage and a desired pressure drop in order to accommodate a known flow rate of gases from the disengager towards the interior of the connecting pipe.
  • FCC fluid catalytic cracking units
  • Figure 1A illustrates an embodiment of the present invention, namely, a sliding ring installed in a telescopic joint
  • Figure 1 B shows a preferred, although not limiting, embodiment of the present invention, namely, the use of an anti-eroding refractory layer which covers the sliding ring
  • an anti-eroding refractory layer which covers the sliding ring
  • Figure 2 shows another preferred mode of the invention, namely, the use of the sliding ring mounted in the telescopic ring connecting the cyclones of the disengaging section of an FCC unit according to US patent 5,569,435. DETAILED DESCRIPTION OF THE PREFERRED MODES
  • Figure 1 A shows the details of the telescopic joint formed by the connecting pipes (1 , 1a), and illustrates the placing a sliding ring (2) between the pipes in order to secure a constant area (1b) for the passage of fluids and a desired pressure drop in order to accommodate a known flow rate of fluids.
  • the proposed configuration for the connection of pipes (1 , 1a) in the telescopic joint to accommodate the sliding ring (2) comprehends forming a hollow flange defining a chamber (3) for receiving the sliding ring (2).
  • Said chamber is built from a ply of the larger diameter connecting pipe (1 a); the sliding ring (2) is first mounted in this chamber and then the connecting pipe (1 ) of lower diameter is then fitted within the ring (2).
  • the sliding ring (2) is built from the same material used for the connecting pipes (1 , 1a). However, different materials may be used for making the sliding ring (2), the choice of material does not constitute a limiting feature of the invention.
  • the diameter of the sliding ring (2) will be a function of the diameters of the connecting pipes (1 , 1a) and of the desired annular space.
  • the passage (1 b) is of constant cross-sectional area along its length.
  • Figure 1A shows the sliding ring (2) as being concentric with the inner pipe (1 ), even if the elements (1 ) and (2) are not concentric there will still be a constant cross-sectional area of flow passage for gas between the ring (2) and the pipe (1 ). With appropriate selection of the gas flow velocity, this gas flow along the passage (1 b) will itself clean the internal wall if the sliding ring (2) and the external wall of the inner pipe (1 ) of any deposits.
  • these deposits may, for example, be coke deposits, but in other apparatus any powdery material may be deposited on the pipe walls if the speed of the gas is not high enough to clear it.
  • any powdery material may be deposited on the pipe walls if the speed of the gas is not high enough to clear it.
  • any sliding of the pipes (1 , 1 a) relative to one another will result in a shear movement as the sliding ring (2) moves relative to the inner pipe (1 ) and this shearing movement will also serve to reduce any deposit which may be present.
  • Such shearing movement is likely to occur more at the start-up of the FCC unit and as a result of any servicing operations during turnaround periods.
  • the thickness of the sliding ring (2) will be dimensioned so as to keep the desired spacing and pressure drop, and may vary within broad limits, this not constituting a limiting aspect of the present invention.
  • Figure 1 A shows the telescopic joint, including the sliding ring (2) proposed in accordance with the present invention, mounted in the vertical position. It is obvious for the experts that the sliding ring (2) of the present invention will be adapted to the use in telescopic joints mounted in the horizontal or the vertical position or mounted at any other angle, the positioning of the telescopic joint does not therefore constitute a limiting aspect of the present invention.
  • FIG. 1 B represents another preferred mode of the present invention, where the sliding ring includes a protective layer of anti-eroding refractory material; the particular kind of refractory used does not constitute a limiting aspect of the invention.
  • the preferred refractory coating is of the same kind as that used in the connecting pipes (1 ,1 a).
  • the application of the sliding ring in telescopic joints, such as proposed by the present invention, will be better understood in connection with the Example below, which should not be construed as limiting the invention.
  • EXAMPLE 1 This example shows one of the preferred applications of the present invention, which is the control of flow rate of gases in the annular space between connecting pipes of FCC converter cyclones.
  • the sliding ring of the telescopic joint By using the sliding ring of the telescopic joint it is possible to ensure that there is a constant area of passage for gases and a desired pressure drop to accommodate a known flow rate of gases from the disengager to the interior of the connecting pipe.
  • Figure 2 shows a schematic view of a converter of an FCC unit where the sliding ring (2) (not shown in the drawings) is mounted in the telescopic joint (5) of the closed cyclone system of the disengager vessel of an FCC unit such as suggested in the said US patent 5,569,435.
  • the reaction zone made up of a vertical tubular reactor (riser) (6) discharges the gas-solid suspension formed by the catalyst and cracking reaction products inside the disengager (7) through the pseudocyclone (8). Purge vapor is introduced through distributor (9).
  • the decanted, substantially hydrocarbon vapor-free catalyst leaves the disengager (7) and is directed to the stripping section (10) and later to the regenerator vessel, not indicated in the Figure.
  • Primary cyclone (11 ) is connected to the pseudocyclone (8) through the pipe
  • the flow rate of purge vapor, injected in the disengager (7), which will flow through the annular space defined by the sliding ring (2) in the telescopic joint (5), in accordance with the present invention, should be such as, together with the gases from the stripping section (10), to allow for the extraction and flow of gases through the lower opening of the cone of the pseudocyclone (8) cone, this representing of from 0.1 to 7% of the overall flow rate of gases which are directed to the next cyclone stage, with a preferred value being 5%.
  • the device for the flow rate control of fluids made up by the sliding ring (2) such as suggested and claimed in the present invention may be used in any telescopic joint which would need such control, the use of the inventive device being therefore not limited to the connecting pipes of the closed cyclones of the catalytic cracking units (FCC).
  • FCC catalytic cracking units

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints Allowing Movement (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Cyclones (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

L'invention concerne un joint télescopique (5) comportant un premier (1) et un deuxième (1a) tuyaux définissant entre eux un espace annulaire contenant une bague (2) coulissante maintenue en place dans ledit joint télescopique (5). Ce dispositif permet au fluide de traverser l'espace annulaire de manière réglée, ainsi que des déplacements des tuyaux (1, 1a) à adapter. Dans une forme de réalisation préférée, le deuxième tuyau (1a) présente un diamètre supérieur à celui du premier tuyau (1), et comporte une chambre (3) pour contenir la bague (2) coulissante, ladite chambre (3) étant formée par un pli du deuxième tuyau (1a).
PCT/BR2000/000030 1999-04-26 2000-04-06 Dispositif de commande d'ecoulement de fluide dans l'espace annulaire de joints telescopiques et utilisation de celui-ci WO2000065269A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI9901484-0 1999-04-26
BR9901484-0A BR9901484A (pt) 1999-04-26 1999-04-26 Dispositivo para o controle de vazão de fluidos no espaço anular de juntas telescópicas e uso do mesmo

Publications (1)

Publication Number Publication Date
WO2000065269A1 true WO2000065269A1 (fr) 2000-11-02

Family

ID=4072262

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2000/000030 WO2000065269A1 (fr) 1999-04-26 2000-04-06 Dispositif de commande d'ecoulement de fluide dans l'espace annulaire de joints telescopiques et utilisation de celui-ci

Country Status (5)

Country Link
AR (1) AR023531A1 (fr)
BR (1) BR9901484A (fr)
CO (1) CO5241343A1 (fr)
PE (1) PE20010228A1 (fr)
WO (1) WO2000065269A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2362117A (en) * 2000-05-09 2001-11-14 Petroleo Brasileiro Sa Multi cyclone separator system with telescopic joints in interconnections to accomodate differential thermal exapansions of system components
WO2004038273A1 (fr) * 2002-10-18 2004-05-06 Mtu Friedrichshafen Gmbh Dispositif pour assembler un premier tuyau et un second tuyau
WO2004108297A1 (fr) * 2003-06-04 2004-12-16 Shell Internationale Research Maatschappij B.V. Appareil de separation
US10166519B2 (en) 2012-07-31 2019-01-01 Uop Llc Methods and fuel processing apparatuses for upgrading a pyrolysis oil stream and a hydrocarbon stream
CN112513506A (zh) * 2018-04-05 2021-03-16 巴西石油公司 伸缩接头
CN113187953A (zh) * 2021-04-27 2021-07-30 成都建工工业设备安装有限公司 一种机电管线穿越沉降缝部位定位辅助施工方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502947A (en) * 1984-05-21 1985-03-05 Mobil Oil Corporation Closed cyclone FCC catalyst separation method and apparatus
US5024454A (en) * 1987-08-25 1991-06-18 Mcgilp Kenneth J Compensating seal
US5569435A (en) * 1993-09-13 1996-10-29 Petroleo Brasiliero S.A. - Petrobras System to separate suspensions of catalyst particles and reacted mixture of hydrocarbons

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502947A (en) * 1984-05-21 1985-03-05 Mobil Oil Corporation Closed cyclone FCC catalyst separation method and apparatus
US5024454A (en) * 1987-08-25 1991-06-18 Mcgilp Kenneth J Compensating seal
US5569435A (en) * 1993-09-13 1996-10-29 Petroleo Brasiliero S.A. - Petrobras System to separate suspensions of catalyst particles and reacted mixture of hydrocarbons

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2362117A (en) * 2000-05-09 2001-11-14 Petroleo Brasileiro Sa Multi cyclone separator system with telescopic joints in interconnections to accomodate differential thermal exapansions of system components
GB2362117B (en) * 2000-05-09 2004-05-19 Petroleo Brasileiro Sa Closed cyclone system having a flow rate distributor and use of same
WO2004038273A1 (fr) * 2002-10-18 2004-05-06 Mtu Friedrichshafen Gmbh Dispositif pour assembler un premier tuyau et un second tuyau
WO2004108297A1 (fr) * 2003-06-04 2004-12-16 Shell Internationale Research Maatschappij B.V. Appareil de separation
US10166519B2 (en) 2012-07-31 2019-01-01 Uop Llc Methods and fuel processing apparatuses for upgrading a pyrolysis oil stream and a hydrocarbon stream
CN112513506A (zh) * 2018-04-05 2021-03-16 巴西石油公司 伸缩接头
US12025249B2 (en) * 2018-04-05 2024-07-02 Petroleo Brasileiro S.A.-Petrobras Telescopic joint
CN113187953A (zh) * 2021-04-27 2021-07-30 成都建工工业设备安装有限公司 一种机电管线穿越沉降缝部位定位辅助施工方法
CN113187953B (zh) * 2021-04-27 2022-05-31 成都建工工业设备安装有限公司 一种机电管线穿越沉降缝部位定位辅助施工方法

Also Published As

Publication number Publication date
PE20010228A1 (es) 2001-02-19
CO5241343A1 (es) 2003-01-31
BR9901484A (pt) 2000-11-07
AR023531A1 (es) 2002-09-04

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