WO1999024135A1 - Ensemble plateaux de contact vapeur-liquide - Google Patents

Ensemble plateaux de contact vapeur-liquide Download PDF

Info

Publication number
WO1999024135A1
WO1999024135A1 PCT/US1998/023810 US9823810W WO9924135A1 WO 1999024135 A1 WO1999024135 A1 WO 1999024135A1 US 9823810 W US9823810 W US 9823810W WO 9924135 A1 WO9924135 A1 WO 9924135A1
Authority
WO
WIPO (PCT)
Prior art keywords
tray
valves
tray assembly
recited
area
Prior art date
Application number
PCT/US1998/023810
Other languages
English (en)
Inventor
Michael J. Binkley
Gary W. Gage
Original Assignee
Koch-Glitsch, Inc.
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 Koch-Glitsch, Inc. filed Critical Koch-Glitsch, Inc.
Priority to AU13140/99A priority Critical patent/AU1314099A/en
Publication of WO1999024135A1 publication Critical patent/WO1999024135A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
    • B01D3/324—Tray constructions
    • B01D3/326—Tray supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/16—Fractionating columns in which vapour bubbles through liquid
    • B01D3/163—Plates with valves

Definitions

  • the present invention relates generally to vapor-liquid contact trays for use in a fluid treatment vessel, and more particularly to an apparatus for improving the performance of such trays by extending the active area thereof.
  • Fractionation column trays generally come in one of two configurations: cross-flow and counter flow.
  • the trays generally consist of a solid tray or deck having a plurality of apertures and are installed on support rings within the tower.
  • vapor ascends through the apertures and contacts the liquid moving across the tray through an "active" area thereof.
  • active area liquid and vapor mix and fractionation occurs.
  • the liquid is directed onto the tray by means of a vertical channel from the tray above. This channel is referred to as the inlet downcomer.
  • the liquid moves across the tray and exits through a similar channel referred to as the exit downcomer.
  • the location of the downcomers determines the flow pattern of the liquid.
  • the liquid is split into a plurality of streams over each tray, it is called a multiple-pass tray. If there is only one inlet and one outlet downcomer on opposite sides of the tray, it is called a single pass tray.
  • the number of passes generally increases as the required liquid rate increases. It is the active area of the tray, however, which is of critical concern.
  • the area along the perimeter of the tray directly overlying the support ring is generally solid.
  • the areas of the tray overlying the support structures are solid. As such, these areas are "inactive", meaning that vapor is not directed through the liquid flowing across these areas, and little or no vapor-liquid contact is induced.
  • a support ring In order to gain more active area for vapor-liquid contact, it is known to provide a construction in which a support ring includes a peripheral area spanning the space between the tray and the walls of the column, and the peripheral area includes a plurality of apertures such that the area between the tray and the column walls is rendered active for vapor-liquid contact.
  • a construction requires the use of a specially constructed support ring, substantially increasing the cost of the assembly, and the improved construction fails to provide for active liquid-vapor contact in the region of overlap of the tray and support ring.
  • an inverted, cup-shaped active washer for securing the tray to the support ring, wherein the washer includes a hollow interior space and presents apertures that permit an ascending flow of vapor therethrough.
  • the washer is constructed of any desired shape, and includes a mounting aperture sized for the receipt of a securing member that passes through an oversized slot or aperture in the tray and engages a clamp secured beneath the support ring.
  • the slot in the tray is oversized to permit vapor to pass up through the active washer into contact with liquid being directed across the tray, rendering the area around the securing member active.
  • an active support ring and active washers increase the active area of the tray to include the areas outside of the tray and around the members used to secure the tray on the support ring, the circumferential area of the tray overlapping the support ring remains inactive. It would be beneficial to extend the active area of the tray into this outer circumferential area of the tray to any extent possible.
  • a downcomer tray assembly for a vapor-liquid contact process column, wherein the tray assembly defines a liquid flow direction in which liquid is directed across the tray assembly and downwardly therefrom, and vapor is directed to flow upward through the liquid.
  • the tray assembly includes a peripheral ring adapted to be secured to the column, and a tray supported on the ring and presenting an inner area disposed inside the periphery of the ring and an outer peripheral area overlying the ring.
  • a first plurality of valves is preferably formed in the inner area of the tray to define an active vapor-liquid contact area, and a second plurality of valves is formed in the tray, each of which overlaps the central and peripheral areas of the tray to increase the active vapor-liquid contact area of the tray assembly.
  • the tray includes a plurality of tray apertures that each span both the inner and outer areas, and valves are supported in the apertures.
  • Each of the valves includes a top wall, a pair of depending side walls, and a valve aperture extending between the tray and the top Wall for defining a vapor flow path, wherein the valve apertures are disposed in the outer peripheral area of the tray.
  • the valves are directional, meaning that they direct vapor flow relative to the liquid flow path to promote vapor-liquid interaction. For example, by angling the valves relative to the liquid flow path by angles of 15°, 30°, 40°, and so on, flow is promoted for capacity and efficiency, and retrograde flow is prevented.
  • a construction in accordance with the present invention numerous advantages are realized. For example, by providing a vapor-liquid contact tray having valves in the outer peripheral area thereof overlapping the circumferential flange of the vessel, more area of the tray is available for vapor-liquid contact, increasing the capacity of the tray. In addition, by providing a construction that minimizes dead areas adjacent the vessel wall, efficiency is improved and fouling of the tray is reduced.
  • the inventive construction also acts as a froth initiator to reduce weepage at the perimeter of the tray.
  • valves extending over the outer peripheral area of the tray include top walls presenting apertures, the assembly further including clamps extending beneath the support ring, and securing members sized for receipt in the apertures for securing the peripheral ring between the tray and the clamps.
  • the valves in the peripheral region of the tray can be used as support holes for receiving the securing member to secure the tray to the flange while doubling as a valve.
  • Fig. 1 is a perspective view of a downcomer tray assembly constructed in accordance with the preferred embodiment of the present invention
  • Fig. 2 is a fragmentary perspective view of the tray assembly, illustrating an active circumferential region thereof;
  • Fig. 3 is a fragmentary top plan view of an alternate embodiment of the vapor-liquid contact tray
  • Fig. 4 is a sectional view taken through line 4-4 of Fig. 3, illustrating a fixed peripheral valve forming apart of the tray assembly, the peripheral valve being used as a location for a fastener for securing the contact tray to the support ring; and
  • Fig. 5 is a fragmentary plan view of an alternate construction of the support ring.
  • a downcomer tray assembly 10 constructed in accordance with the present invention is illustrated in Fig. 1, and is adapted for use on a vapor-liquid contact column 12 such as that described in U.S. Patent No. 5,453,222, issued September 25, 1995, and incorporated herein.
  • the column is conventional, and is preferably constructed of metal or any other suitable material that is resistant to corrosion and wear when exposed to the fluids to be handled therein.
  • the downcomer tray assembly 10 broadly includes a peripheral support ring 14 adapted to be secured to the column by welding or the like, a vapor-liquid contact tray 16 supported on the ring, a downcomer 18 through which liquid passes from the tray to an underlying tray, and an inlet region 20 into which liquid flows from an overlying tray.
  • a plurality of valves 22, 24 are supported on the tray, and provide an active area on the tray within which vapor is directed transverse to the liquid flow path such that the vapor and the liquid in the column are brought into cross-flow contact with one another.
  • the support ring 14 is preferably formed of the same metal or material as the column, and is in the shape of an annular ring, presenting opposed upper and lower planer surfaces, and radially opposed inner and outer circumferential edges. As shown in Fig. 2, the outer circumferential edge is secured to the inner wall of the column 12, preferably by welding, and the tray 16 is supported on the upper surface thereof. Turning to Fig. 5, an alternate construction of the support ring is illustrated, wherein the ring 26 includes an inner circumferential edge that is scalloped or cut away at a plurality of locations there along in order to accommodate at least some of the valves on the tray.
  • the contact tray 16 of the assembly 10 is formed from a sheet or plate of metal or any other suitable material that is resistant to corrosion and wear when exposed to the fluids to be handled in the column.
  • the tray is a planer panel of generally circular shape, being truncated on diametrically opposed sides thereof to accommodate the downcomer 18 and the inlet region 20.
  • the tray presents an upper liquid support surface, and defines an outer diameter that is smaller than the outer diameter of the support ring 14 but larger than the inner diameter of the ring. As shown in Fig.
  • an inner area 28 of the tray 16 is defined by the area of the tray that is located radially inside of the support ring, and an outer area 30 of the tray extends along the periphery of the tray overlying the ring.
  • the inner area of the tray is the area that does not overlie the ring, while the outer peripheral area does.
  • the tray 16 is slotted or perforated to accommodate the valves 22, 24, and the perforations extend over the inner area 28 of the tray and at least a radially inner portion of the outer area 30.
  • the valves 22 supported in the inner area of the tray need not be of the same type as valves 24 used in the outer area, and make up a first plurality of valves that define an active vapor-liquid contact area of the tray.
  • the second plurality of valves 24 are supported in the outer area of the tray, and also define the active area of the tray such that the active area extends radially beyond the inner area 28 of the tray at least partially into the outer peripheral area 30. As shown in Fig.
  • each of the perforations 32 in the outer area of the tray overlap the inner area such that when the tray 16 rests on the support ring 14, the perforations 32 extend partially over the ring.
  • each perforation is generally circular, defining a center point that is located in the inner area of the tray.
  • the valves 24 supported in the perforations at the inner circumferential edge of the support ring 14 overlap the ring so that the active area defined by the tray extends completely to the inner circumferential edge of the ring, and beyond.
  • the valves 22, 24 provide for the flow of gases or vapor up through the liquid that is directed across the tray in order to provide mixing of the vapor and liquid.
  • valves are of conventional construction, and can either be fixed or moveable as is understood to a person of ordinary skill in the art of designing such contact trays.
  • the valves 22, 24 are fixed, and each valve 22, 24 includes a top wall 34 and a pair of diametrically opposed depending side walls 36 that extend between and connect the top wall and the tray.
  • Such valves can be constructed by punching or otherwise deforming the metal of the tray to shape the valve from the material displaced by the formation of the perforation.
  • each valve 22, 24 presents diametrically opposed, laterally extending openings or apertures 38 that are generally semi-circular is shape, and extend between the depending side walls 36 of the valve. The effect created by this construction of the valve is that vapor is directed through the valve in a generally horizontal direction laterally of the valve.
  • valves 24 can be oriented parallel to the direction of liquid flow across the tray between the inlet region and the downcomer, or can be angled relative to the direction of liquid flow. If the valves are angled, any desired angle can be chosen.
  • each valve 24 is individually oriented to promote mixing of vapor and liquid on the tray, wherein the valves are oriented at 15°, 30°, 40°, etc., relative to the direction of liquid flow across the tray. In addition to improving liquid-vapor contact, this construction also prevents retrograde flow across the tray.
  • valves 24 can be used as both valves and as points of securement between the tray and the support ring.
  • the valves that are to be used for this purpose are provided with holes through the top wall thereof such that the top wall can receive a securing member 40.
  • the securing member preferably includes a threaded bolt or the like, and a clamp 42 is provided beneath the tray and ring for receiving the bolt.
  • a washer 44 and nut 46 are secured to the upper threaded end of the bolt to tighten the clamp against the bottom of the support ring and the tray to secure the tray in place.
  • the valve remains able to function as a valve in allowing vapor to pass up through the contact tray for mixing with the liquid supported on the tray.
  • the securing member 40 occupies a portion of the area of the valve, a percentage of the area remains open for use as a valve.
  • the subject of the present invention can also be employed with sieve, perforated or other types of trays including moveable valves, conventional, small scale valves, miniature valves, and the like.
  • the invention also applies to the use of tabs, hoods, scoops and shapes of directional flow promoters that overlap the support ring, flange, joints or other beam or support structures.
  • the subject of the invention is employed to increase or extend the active area of the contact tray by employed peripheral valves, preferably fixed, that extend beyond or overlap the support structure.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

L'invention concerne un ensemble plateaux (10) de déversoir, destiné à une colonne de fractionnement par contact vapeur-liquide et délimitant un sens d'écoulement fluidique, l'écoulement de liquide étant dirigé à travers l'ensemble plateaux, vers le bas, à partir de cet ensemble, et l'écoulement de vapeur étant dirigé vers le haut, à travers le liquide. Cet ensemble plateaux (10) comprend une bague périphérique (14), conçue pour être fixée sur la colonne, ainsi qu'un plateau (16) supporté par la bague (14) et présentant une zone intérieure disposée à l'intérieur de la périphérie de la bague et une zone extérieure périphérique recouvrant la bague (14). Un premier ensemble soupapes (22) est formé dans la zone intérieure du plateau (16), afin de délimiter une zone active de contact vapeur-liquide, et un second ensemble soupapes (24) est formé qui recouvre les zones centrales et périphériques du plateau, afin d'augmenter la zone active de contact vapeur-liquide. Chaque soupape (24) du second ensemble comprend une paroi supérieure (24), une paire de parois latérales(36), partant de la paroi supérieure, ainsi qu'une ouverture (38) ménagée entre le plateau (16) et la paroi supérieure (34), afin de délimiter un trajet d'écoulement de vapeur. L'ouverture (38) des soupapes est placée sur la zone périphérique extérieure du plateau (16), afin de favoriser l'écoulement dans cette zone et d'augmenter la zone active du plateau (16).
PCT/US1998/023810 1997-11-10 1998-11-10 Ensemble plateaux de contact vapeur-liquide WO1999024135A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU13140/99A AU1314099A (en) 1997-11-10 1998-11-10 Vapor-liquid contact tray assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6527597P 1997-11-10 1997-11-10
US60/065,275 1997-11-10

Publications (1)

Publication Number Publication Date
WO1999024135A1 true WO1999024135A1 (fr) 1999-05-20

Family

ID=22061566

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/023810 WO1999024135A1 (fr) 1997-11-10 1998-11-10 Ensemble plateaux de contact vapeur-liquide

Country Status (2)

Country Link
AU (1) AU1314099A (fr)
WO (1) WO1999024135A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002102488A1 (fr) * 2001-06-18 2002-12-27 Koch-Glitsch, Lp Plateau de contact pourvu de deversoirs et procedes correspondants
WO2010019669A3 (fr) * 2008-08-13 2010-04-15 Koch-Glitsch, Lp Plateau à écoulement transversal et procédé l'employant
RU2542265C1 (ru) * 2013-11-14 2015-02-20 Игорь Анатольевич Мнушкин Ситчатая тарелка провального типа для массообменных аппаратов, работающих в системах "газ-жидкость" и "газ-жидкость-жидкость"
EP3034143A1 (fr) 2014-12-19 2016-06-22 IFP Energies nouvelles Plateau distributeur pour colonne d'echange de chaleur et/ou de matiere comprenant des moyens de bullage
WO2016102081A1 (fr) * 2014-12-23 2016-06-30 Sulzer Chemtech Ag Agencement d'ouvertures pour plateau de contact vapeur-liquide
CN110918042A (zh) * 2019-12-27 2020-03-27 上海聚友化工有限公司 预缩聚反应釜
CN115518404A (zh) * 2022-09-13 2022-12-27 无锡市华诚石化设备有限责任公司 一种带导流升汽围栏的条形浮阀塔盘

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503856A1 (de) * 1995-02-06 1996-08-08 Fritz Merten Ballastventil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503856A1 (de) * 1995-02-06 1996-08-08 Fritz Merten Ballastventil

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002102488A1 (fr) * 2001-06-18 2002-12-27 Koch-Glitsch, Lp Plateau de contact pourvu de deversoirs et procedes correspondants
KR100860216B1 (ko) * 2001-06-18 2008-09-24 코크-글리취, 엘피 지지식 하강유로를 갖는 접촉 트레이 및 이를 구성하는 방법
WO2010019669A3 (fr) * 2008-08-13 2010-04-15 Koch-Glitsch, Lp Plateau à écoulement transversal et procédé l'employant
CN102105201A (zh) * 2008-08-13 2011-06-22 科氏-格利奇有限合伙公司 错流盘及其实施方法
US8191870B2 (en) 2008-08-13 2012-06-05 Koch-Glitsch, Lp Cross-flow tray and method employing same
RU2491112C2 (ru) * 2008-08-13 2013-08-27 Кох-Глич, Лп Тарелка колонны с поперечным течением и способ ее применения
CN102105201B (zh) * 2008-08-13 2015-02-04 科氏-格利奇有限合伙公司 错流盘及其实施方法
TWI498148B (zh) * 2008-08-13 2015-09-01 Koch Glitsch Lp 交叉流托架及使用其之方法
KR101604149B1 (ko) 2008-08-13 2016-03-16 코크-글리취, 엘피 횡류 트레이 및 이를 이용하기 위한 방법
RU2542265C1 (ru) * 2013-11-14 2015-02-20 Игорь Анатольевич Мнушкин Ситчатая тарелка провального типа для массообменных аппаратов, работающих в системах "газ-жидкость" и "газ-жидкость-жидкость"
EP3034143A1 (fr) 2014-12-19 2016-06-22 IFP Energies nouvelles Plateau distributeur pour colonne d'echange de chaleur et/ou de matiere comprenant des moyens de bullage
KR20170098261A (ko) * 2014-12-23 2017-08-29 술저 켐테크 악티엔게젤샤프트 증기-액체 접촉 트레이의 개구의 레이아웃
KR102303436B1 (ko) 2014-12-23 2021-09-17 술저 매니지멘트 에이지 증기-액체 접촉 트레이의 개구의 레이아웃
CN107257703A (zh) * 2014-12-23 2017-10-17 苏舍化学技术有限公司 汽液接触盘的孔布局
JP2018500161A (ja) * 2014-12-23 2018-01-11 スルザー ケムテック アクチェンゲゼルシャフト 気液接触トレイ用の開口配置
EP3434345A1 (fr) * 2014-12-23 2019-01-30 Sulzer Chemtech AG Agencement d'ouverture pour plateau de contact vapeur-liquide
RU2681025C2 (ru) * 2014-12-23 2019-03-01 Зульцер Хемтех Аг Компоновка отверстий для парожидкостной контактной тарелки
US20190255457A1 (en) * 2014-12-23 2019-08-22 Sulzer Chemtech Ag Aperture Layout for Vapor-Liquid Contact Tray
KR102348436B1 (ko) 2014-12-23 2022-01-06 술저 매니지멘트 에이지 증기-액체 접촉 트레이의 개구의 레이아웃
US10737196B2 (en) 2014-12-23 2020-08-11 Sulzer Chemtech Ag Aperture layout for vapor-liquid contact tray
CN107257703B (zh) * 2014-12-23 2021-02-05 苏尔寿管理有限公司 汽液接触盘的孔布局
WO2016102081A1 (fr) * 2014-12-23 2016-06-30 Sulzer Chemtech Ag Agencement d'ouvertures pour plateau de contact vapeur-liquide
KR20210115062A (ko) * 2014-12-23 2021-09-24 술저 매니지멘트 에이지 증기-액체 접촉 트레이의 개구의 레이아웃
CN110918042A (zh) * 2019-12-27 2020-03-27 上海聚友化工有限公司 预缩聚反应釜
CN115518404A (zh) * 2022-09-13 2022-12-27 无锡市华诚石化设备有限责任公司 一种带导流升汽围栏的条形浮阀塔盘

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