EP3606632A1 - Procédé et système de régulation des pertes de charge à travers des clapets par des orifices - Google Patents

Procédé et système de régulation des pertes de charge à travers des clapets par des orifices

Info

Publication number
EP3606632A1
EP3606632A1 EP18744141.5A EP18744141A EP3606632A1 EP 3606632 A1 EP3606632 A1 EP 3606632A1 EP 18744141 A EP18744141 A EP 18744141A EP 3606632 A1 EP3606632 A1 EP 3606632A1
Authority
EP
European Patent Office
Prior art keywords
valve
tray
leg
fluid
aperture
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.)
Pending
Application number
EP18744141.5A
Other languages
German (de)
English (en)
Other versions
EP3606632A4 (fr
Inventor
Larry W. Burton
Michael J. Binkley
Phillip Bradley FLEMING
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.)
Sulzer Management AG
Original Assignee
GTC Technology US LLC
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 GTC Technology US LLC filed Critical GTC Technology US LLC
Publication of EP3606632A1 publication Critical patent/EP3606632A1/fr
Publication of EP3606632A4 publication Critical patent/EP3606632A4/fr
Pending legal-status Critical Current

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
    • B01D3/16—Fractionating columns in which vapour bubbles through liquid
    • B01D3/163—Plates with valves

Definitions

  • the present disclosure relates to fluid-fluid contacting trays and, more particularly, but not by way of limitation, to an improved fluid dispersion device and tray assembly incorporating fixed and/or floating valves including "snap-in" field replacement valve configurations for use in conjunction with an array of tray deck orifices of having a selectively reduced size.
  • Trays for fractionation columns are commonly designed in two general configurations: cross-flow and counter flow. Trays generally consist of a solid tray or deck having a plurality of apertures and are installed on support rings within the column. In cross- flow trays, lighter fluid ascends through the apertures and contacts heavier fluid moving across the tray, through the "active" area thereof. In this area, the heavier fluid and the lighter fluid mix and fractionation occurs. The heavier fluid 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 heavier fluid 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 heavier fluid.
  • the tray is often referred to as a Multipass Tray.
  • the number of passes generally increases as the required (design) flow rate increases. It is the active area of the tray, however, which is of concern.
  • the concentration-difference between the lighter fluid and the heavier fluid can be effected in many ways; some reducing efficiency. For example, as operating pressure increases, the heavier fluid begins to absorb lighter fluid as it moves across a tray. This is above that normally dissolved in the heavier fluid and represents much larger amounts of lighter-fluid bubbles that are commingled or "entrained" with the heavier fluid. This lighter fluid is not firmly held and is released within the downcomer, and, in fact, the majority of said lighter fluid must be released otherwise the downcomer cannot accommodate the heavier fluid/lighter fluid mixture and will flood, thus preventing successful tower operation. This phenomena is generally deemed to occur when operating pressure is such as to produce a lighter fluid density above about 1.0 lbs/cu. ft.
  • the released lighter fluid must oppose the descending frothy lighter fluid/heavier fluid mixture flowing over the weir into the downcomer. In many cases, such opposition leads to poor tower operation and premature flooding.
  • the present disclosure relates to fluid-fluid contacting trays and, more particularly, but not by way of limitation, to an improved fluid dispersion device and tray assembly incorporating fixed and/or floating units used in conjunction with a tray orifice or aperture of a selectively reduced size.
  • the disclosure relates to a valve tray for use in a chemical-process column.
  • the valve tray includes a tray surface having an aperture formed therein.
  • the aperture is of an aperture area.
  • a retaining cage is disposed on the tray surface proximate the aperture.
  • the retaining cage includes an upper portion and a leg extending downwardly from the upper portion and coupled to the tray surface proximate the aperture.
  • a valve cover is disposed in the retaining cage.
  • the valve cover includes a top surface having a surface area and at least one vane formed on an edge of the top surface. The at least one vane is directed outwardly and downwardly relative to the top surface.
  • the aperture area is smaller than the surface area.
  • the disclosure relates to a valve.
  • the valve includes a retaining cage disposed on a tray surface proximate the aperture.
  • the retaining cage includes an upper portion and a leg extending downwardly from the upper portion.
  • a valve cover is disposed in the retaining cage.
  • the valve cover includes a top surface having a surface area and at least one vane formed on an edge of the top surface. The at least one vane is directed outwardly and downwardly relative to the top surface.
  • the disclosure relates to a method of forming a valve tray for use in a chemical-process column.
  • the method includes forming a tray surface having an aperture formed therein.
  • the aperture is of an aperture area.
  • a valve cover is placed on the tray surface over the aperture.
  • the valve cover includes a central portion having a surface area.
  • the aperture area is smaller than the surface area.
  • a retaining cage is placed on the tray surface over the valve cover. The retaining cage is secured to the tray surface.
  • FIGURE 1 is a perspective view of a packed column with various sections cut away for illustrating, diagrammatically, a variety of tower in accordance with an illustrative embodiment
  • FIGURE 2 is a diagrammatic, si de-el evational, cross-sectional view of a downcomer-tray assembly secured within a process tower and illustrating the flow of heavier fluid and lighter fluid thereacross in accordance with an illustrative embodiment
  • FIGURE 3 is a top-plan, diagrammatic view of a tray illustrating efficiency problems with fluid flow transit in accordance with an illustrative embodiment
  • FIGURE 4A is a top view of a tray orifice having a plurality of apertures according to an illustrative embodiment
  • FIGURE 4B is a top view of a tray orifice having restricted central portion according to an illustrative embodiment
  • FIGURE 4C is a top view of a trapezoidal tray orifice according to an illustrative embodiment
  • FIGURE 5 is a top view of a fixed valve according to an illustrative embodiment
  • FIGURE 6 is an end view of the valve of FIGURE 5 according to an illustrative embodiment
  • FIGURE 7 A is a top view of a valve having a tab according to an illustrative embodiment
  • FIGURE 7B is a cross-sectional view of the valve of FIGURE 7A according to an illustrative embodiment
  • FIGURE 8 is a cross-sectional view of a floating valve according to an illustrative embodiment
  • FIGURE 9 is a top view of a valve positioned over an orifice according to an illustrative embodiment
  • FIGURE 10 is a top view of a valve positioned over an orifice according to an illustrative embodiment
  • FIGURE 11A is a perspective view of a domed valve according to an illustrative embodiment
  • FIGURE 1 IB is a perspective view of a domed valve having retainer clips according to an illustrative embodiment
  • FIGURE 11C is a perspective view of a domed valve having retainer tabs according to an illustrative embodiment
  • FIGURE 12 is a top view of the domed valve of FIGURE 11 showing a relative size of a valve orifice according to an illustrative embodiment
  • FIGURE 13 A is a cross sectional view of a valve having a flat top according to an illustrative embodiment
  • FIGURE 13B is a cross sectional view of a valve having a cone top according to an illustrative embodiment
  • FIGURE 13C is a cross sectional view of a valve having a domed top according to an illustrative embodiment
  • FIGURE 13D is a cross sectional view of a valve having a shoulder top according to an illustrative embodiment
  • FIGURE 14A is a top perspective view of a tray having a plurality of snap-in domed valves disposed therein according to an illustrative embodiment
  • FIGURE 14B is a bottom perspective view of the tray of FIGURE 14A according to an illustrative embodiment
  • FIGURE 15A is a top perspective view of a tray having a plurality of valves located thereon and secured in place with a three-legged cage according to an illustrative embodiment
  • FIGURE 15B is a bottom perspective view of a tray having a plurality of valves located thereon and secured in place with a three-legged cage according to an illustrative embodiment
  • FIGURE 16A is a top perspective view of a tray having a plurality of valves located thereon and secured in place with a four-legged cage according to an illustrative embodiment
  • FIGURE 16B is a bottom perspective view of a tray having a plurality of valves located thereon and secured in place with a four-legged cage according to an illustrative embodiment
  • FIGURE 17 is a perspective view of a captive valve having a securement strap according to an illustrative embodiment
  • FIGURE 18A is a top perspective view of a rectangular captive valve having a securement strap according to an illustrative embodiment.
  • FIGURE 18B is a bottom perspective view of the valve of FIGURE 18 A. DETAILED DESCRIPTION
  • FIGURE 1 a fragmentary, perspective view of an illustrative packed exchange tower or column with various sections cut away for showing a variety of tower internals and the utilization of one embodiment of an improved high-capacity tray assembly.
  • the exchange column 10 of FIGURE 1 comprises a cylindrical tower 12 having a plurality of packing bed layers 14 and trays disposed therein.
  • a plurality of manways 16 is likewise constructed for facilitating access to the internal region of the tower 12.
  • side stream draw-off line 20 heavier-fluid side feed line 18, and side stream lighter-fluid feed line or reboiler return line 32.
  • a reflux return line 34 is provided atop the column 10.
  • heavier fluid 13 is fed into the column 10 through reflux return line 34 and side stream feed-input feed line 18.
  • the heavier fluid 13 flows downwardly through the tower and ultimately leaves the tower either at side stream draw-off line 20, or at bottom- stream draw-off line 30.
  • the heavier fluid 13 during its downward flow, is depleted of some material which evaporate from it as it passes through the trays and packing beds, and is enriched or added to by material which condenses into it out of the lighter fluid stream.
  • the exchange column 10 is shown diagrammatically cut in half for purposes of clarity.
  • the column 10 includes a lighter-fluid outlet in overhead line 26 disposed atop the tower 12 and a lower skirt 28 disposed in the lower region of the tower 12 around bottom stream takeoff line 30 coupled to a reboiler
  • Reboiler return conduit 32 is shown disposed above the skirt 28 for recycling lighter fluid 15 therein upwardly through the trays and/or packing layers 14. Reflux from condensers is provided in the upper tower region 23 through entry conduit 34 wherein reflux is distributed throughout a distributor 36 across upper packing bed 38. It may be seen that the upper packing bed 38 is of the structured packing variety.
  • the column 10 beneath the upper packing bed 38 are shown for the purpose of illustration and include a heavier fluid collector 40 disposed beneath a support grid 41 in support of the upper structured packing 38.
  • the column 10 is presented with cut-line 43 for illustrating the fact that the tower internals arrangement is diagrammatical only and is provided for referencing various component arrays therein.
  • a trayed column usually contains a plurality of trays 48 of the type shown herein.
  • the trays 48 are valve or sieve trays.
  • Valve trays, comprising the subject matter of the present disclosure, are herein shown. Such trays comprise plates which are punched or slotted in construction.
  • the configuration referred to as a "valve” or “unit” includes anything at the intersection of and facilitating the dispersion contact between a lighter fluid 15 and a heavier fluid 13.
  • the lighter fluid 15 and the heavier fluid 13 engage at or along the tray.
  • the lighter-fluid 15 and heavier-fluid 13 flows reach a level of stability.
  • this stability may be achieved with a relatively low flow rate permitting the ascending lighter fluid 15 to mix with the descending heavier fluid 13.
  • no downcomers are used and the lighter fluid 15 and the heavier fluid 13 use the same openings, alternating as the respective pressures change.
  • Tray 48 is constructed with a plurality of floating valves.
  • Tray 49 also illustrates a raised inlet section 51 beneath downcomer 53, which is substantially planar, formed with a plurality of apertures, and which may include a series of momentum deflector barriers, as will be described below.
  • the raised inlet area is described in more detail in U.S. Patent No. 4,956, 127 (the ⁇ 27 Patent). Corrosion is another consideration in designing packed towers and for the selection of the material, design, and the fabrication of the tower internals.
  • FIGURE 2 illustrates a side-elevational, cross-sectional, diagrammatic view of the trays 48 and 49 of FIG 1.
  • An upper tray 48 comprises a first valved panel.
  • the lower tray 49 is also of generally planar construction across its central active area 52, having a plurality of valves 100 mounted thereon, disposed therein, or formed therefrom as diagrammatically shown.
  • Heavier fluid 13 travels down a downcomer 53 having a straight, sloped, tapered or mitered bottom section 54, from tray 48 disposed thereabove.
  • the tapered section 54 of the downcomer provides a clearance angle for lighter fluid flow from the active inlet area, which clearance angle affords a horizontal flow vector to the lighter fluid vented through a flat or raised panel 51.
  • the heavier fluid 13 engages lighter fluid 15 discharged from the active panel area 51 beneath the downcomer 53.
  • the froth 61 extends with a relatively uniform height, shown in phantom by line 63 across the width of the tray 49 to the opposite end 65 where a weir 67 is established for maintaining the froth height 63.
  • the accumulated froth at this point flows over the top of the weir 67 into associated downcomer 69 that carries the froth downwardly into a lower region 70 where the heavier fluid accumulates and disperses upon active inlet region 71 therebeneath.
  • active inlet region 71 is shown herein diagrammatically for purposes of illustration only.
  • the area of holes and perforations for a single cross-flow plate establish the active length of the plate and the zone in which the froth 61 is established. It should be noted that the present disclosure would also be applicable to multiple downcomer configurations, wherein the downcomers and raised, active inlet areas may be positioned in intermediate areas of the trays as also described below. By increasing the total active area of active inlet areas 51 and 71, greater capacity and efficiency is achieved. It is also the manner of flow of the heavier fluid 13 across the tray 49 which is critical to tray efficiency.
  • FIGURE 3 illustrates a flow diagram across a conventional tray.
  • the prior art tray 72 is illustrated herein as a round unit having a first conventional downcomer for feeding heavier fluid upon an underlying panel 73 and then to the tray 74.
  • a second downcomer 74A carries heavier fluid away from the tray.
  • a plurality of arrows 75 illustrates the non-uniform flow of heavier fluid 13 typically observed across a conventional prior art tray which does not address the circulation issue. Circular flow is shown to be formed on both sides of the plate lateral to the direction of primary flow. The formation of these retrograde flow areas, or recirculation cells 76, decreases the efficiency of the tray.
  • Recirculation cells 76 are the result of retrograde flow near the walls of the process column and this backflow problem becomes more pronounced as the diameter of the column increases. With the increase in retrograde flow and the resultant stagnation effect from the recirculation cells, concentration-difference driving force for mass transfer between the counter-flowing streams is reduced. The reduction in concentration-difference driving force will result in more contact or height requirement for a given separation in the column.
  • back mixing is but a single aspect of plate efficiency, the reduction thereof is provided concurrently with the other advantages hereof. Reference is again made to the plate efficiency discussion set forth in above referenced ⁇ 27 Patent.
  • FIGURE 4A is a top view of a tray orifice 402.
  • a valve tray 400 includes a plurality of orifices 402 formed therein.
  • the plurality of orifices 402 includes a plurality of apertures 404 and two slots 406.
  • the plurality of apertures 404 includes two apertures each having a generally round shape; however, in other embodiments any number or shape of apertures could be utilized.
  • a valve (not shown) is secured to the tray 400 via the two slots 406.
  • the valve may be, for example, a fixed valve or a floating valve.
  • Vapor ascends upwardly through the plurality of apertures 404 for interaction and mass transfer with a second fluid on the a surface of the tray 400.
  • a combined area of the plurality of apertures 404 is less than a surface area of the valve (not shown).
  • the two apertures restrict ascension of vapor upwardly through the tray 400.
  • a width of the valve is approximately 1.15 to approximately 2.0 times an open area associated with the plurality of apertures 404. That is, the open area of each aperture of the plurality of apertures 404 is approximately 87% to approximately 50% of the surface area of the valve.
  • FIGURE 4B is a top view of a tray orifice 452.
  • a tray 450 includes a plurality of orifices 452.
  • the each orifice of the plurality of orifices 452 includes opposed ends 454 and a central portion 456.
  • the opposed ends 454 have a greater lateral width than the central portion 456 thereby imparting a capital I shape to the plurality of orifices 454.
  • a valve (not shown) is secured in the opposed ends 454.
  • the valve may be, for example, a fixed valve or a floating valve. Vapor ascends upwardly through the central portion 456 for interaction and mass transfer with a second fluid on the a surface of the tray 450.
  • an area of the central portion 456 is less than a surface area of the valve (not shown).
  • a width of the valve is approximately 1.15 to approximately 2.0 times greater than an open area associated with the central portion 456. That is the open area of each orifice of the plurality of orifices 452 is approximately 87% to approximately 50% of the surface area of the valve.
  • the central portion restricts ascension of vapor upwardly through the tray 450.
  • FIGURE 4C is a top view of a tray orifice 472.
  • a tray 470 includes a plurality of orifices 472.
  • the plurality of orifices 472 have a generally trapezoidal shape.
  • a valve (not shown) is secured in a spaced relationship relative to the orifice 472.
  • a width of the valve is approximately 1.15 to approximately 2.0 times greater than an open area associated with the orifice 472. That is the open area of each orifice of the plurality of orifices 472 is approximately 87% to approximately 50% of the surface area of the valve.
  • the valve may be at least one of a fixed valve or a floating valve.
  • FIGURE 5 is a top view of a valve 500.
  • the valve 500 is disposed in a spaced relationship relative to an orifice 502 in a tray deck.
  • the orifice 502 may be similar to those shown in FIGURES 4A-4C.
  • the valve 500 includes a central portion 506, which central portion 506 is spaced from the orifice 502.
  • the central portion 506 exhibits a generally trapezoidal shape; however, in other embodiments, valves utilizing principles of the disclosure may have central portions of any shape.
  • An upstream leg 512 and a downstream leg 510 support the central portion and maintain the central portion 506 in the spaced relationship with the orifice 502.
  • a vane 508 is formed on either side of the central portion 506.
  • the vanes 508 extend outwardly and downwardly from the central portion 506. During operation, the vanes 508 direct ascending fluid downwardly onto the tray deck thereby facilitating fluid interaction.
  • the central portion 506 extends beyond the edges of the orifice 502 in both a length-wise and a width-wise direction.
  • the central portion 506 has a surface area that is larger than an area of the orifice 502.
  • the central portion is approximately 1.15 to approximately 2.0 times larger than an area of the orifice
  • valve cover width to orifice width ratio may range from lower ratio of about 1.15 to a higher ratio of about 4.0.
  • the preferred ratio depending on the specifics of the application, is in the range of 1.3-2.3.
  • Such an arrangement restricts passage of the lighter fluid ascending through the orifice 502 and provides proper pressure drop control for design-range requirements.
  • Such an arrangement also allows a larger escape area for ascending fluid thereby increasing capacity resulting from lower velocity escape and reduced spray heights. Chances of fouling are also reduced as a result of the larger escape area. Additional information regarding the valve cover width to orifice width ratio is provided in the following table.
  • FIGURE 6 is an end view of the valve 500.
  • the upstream leg 512 includes barriers 614 extending from either side of an upper aspect of the upstream leg 512.
  • the barriers 614 have a width and a height generally equal to that of the vanes 508.
  • the barriers 614 effectively "close off an end portion of the vanes 508 and obstruct fluid flow therethrough. By closing off the corners between the upstream leg 512 and the vanes 508, a more uniform mixing contact from the valve 500 is accomplished.
  • the vanes 508 direct ascending fluid in a downward direction thereby creating a vena contracta between a lower edge of the vanes 508 and a tray deck. Such a phenomenon encourages the ascending fluid to distribute across the tray deck and mix with heavier fluid moving laterally, thereby improving the contact efficiency.
  • FIGURE 7A is a top view of a valve 700.
  • FIGURE 7B is a cross-sectional view of the valve 700.
  • the valve 700 is disposed in a spaced relationship relative to an orifice 702 in a tray deck 704.
  • the orifice 702 may be similar to those shown in FIGURES 4A-4C.
  • the valve 700 includes a central portion 706, which central portion 706 is spaced from the orifice 702. As shown by way of example in FIGURE 5, the central portion 706 exhibits a generally trapezoidal shape; however, in other embodiments, valves utilizing principles of the disclosure may have central portions of any shape.
  • An upstream leg 712 and a downstream leg 710 support the central portion 706 and maintain the central portion 706 in the spaced relationship with the orifice 702.
  • an area of the central portion 706 is approximately 1.15 to approximately 2.0 times larger than an open area of the orifice 702. That is an open area of the orifice 702 is approximately 87% to approximately 50% of the surface area of the central portion 706 of the valve 700.
  • a secondary plate is secured to an underside of the tray deck 704 beneath the orifice 702. The secondary plate reduces a size of the orifice 702 relative to the valve 700 as noted above.
  • an orifice 714 is disposed in the downstream leg 710.
  • a tab 716 is formed adjacent to the orifice 714 for directing fluid emerging from the orifice 714 in a desired direction.
  • a vane 708 may be formed on either side of the central portion 706. The vanes 708 extend outwardly and downwardly from the central portion 706.
  • the vanes 708 direct ascending fluid 713 in a downward direction thereby creating a vena contracta between a lower edge of the vanes 708 and the tray deck 704.
  • Such a phenomenon encourages the ascending fluid 713 to distribute across the tray deck and mix with heavier fluid 715 moving laterally, thereby reducing pressure drop across the valve 700 and improving the contact efficiency.
  • FIGURE 8 is a cross-sectional side view of a valve 800.
  • the valve 800 is disposed in a spaced relationship relative to an orifice 802 in a tray deck 804.
  • the orifice 802 is similar to at least one of those shown in FIGURES 4A-4C.
  • the valve 800 includes a central portion 806, which central portion 806 is spaced from the orifice.
  • the central portion 806 exhibits a generally trapezoidal shape; however, in other embodiments, valves utilizing principles of the disclosure may have central portions of any shape.
  • an area of the central portion 806 is approximately 1.15 to approximately 2.0 times larger than an open area of the orifice 802.
  • an open area of the orifice 802 is approximately 87% to approximately 50% of the surface area of the central portion 806 of the valve 800.
  • An upstream leg 812 and a downstream leg 810 support the central portion and maintain the central portion 806 in the spaced relationship with the orifice.
  • an orifice 814 is disposed in the downstream leg 810.
  • a tab 816 is formed adjacent to the orifice 814 for directing fluid emerging from the orifice 814 in a desired direction.
  • a securement lip 818 extends from a lower aspect of each of the upstream leg 812 and the downstream leg 810.
  • the securement lip 818 secures the valve 800 with respect to the orifice 802 and restricts the range of the valve 800 from the tray deck 804.
  • the valve 800 may translate in along a vertical axis relative to the tray deck 804.
  • a height of the valve 800 is dictated by a volume of fluid passing through the orifice 802.
  • an upward flow of fluid through the orifice 802 lifts the valve 800 from the tray deck 804 until the securement lips 818 come into contact with an underside of the tray deck 804.
  • valve 800 is able to "float" with respect to the tray deck 804.
  • the securement lip 818 defines an upper limit of movement of the valve 800.
  • a vane 808 is formed on either side of the central portion 806. The vanes 808 extend outwardly and downwardly from the central portion 806.
  • the vanes 808 direct ascending fluid in a downward direction thereby creating a vena contracta between a lower edge of the vanes 808 and the tray deck 804. Such a phenomenon encourages the ascending fluid to distribute across the tray deck and mix with heavier fluid moving laterally, thereby improving the contact efficiency.
  • FIGURE 9 is a top view of a valve 900 positioned over an orifice 902 formed in a tray deck 904.
  • the orifice 902 is generally trapezoidal in shape and includes securement slots 903a and 903b.
  • the valve 900 includes a central portion 906 positioned above and in a spaced relationship relative to the orifice 902.
  • an area of the central portion 906 is approximately 1.15 to approximately 2.0 times larger than an open area of the orifice 902. That is an open area of the orifice 902 is approximately 87% to approximately 50% of the surface area of the central portion 906 of the valve 900.
  • An upstream securement leg 910 and a downstream securement leg 912 extend from the central portion 906 and are arranged substantially perpendicular thereto.
  • the upstream securement leg 910 extends through the securement slot 903a and the downstream securement leg 912 extends through the securement slot 903b.
  • a portion of the upstream securement leg 910 that extends through the securement slot 903a is bent inwardly towards the downstream securement leg 912.
  • a portion of the downstream securement leg 912 that extends through the securement slot 903b is bent inwardly towards the upstream securement leg 910.
  • the upstream securement leg 910 and the downstream securement leg 912 secure the valve 900 to the tray deck 904 and prevent removal of the valve 900 therefrom.
  • each vane of the pair of vanes 908 extend laterally and downwardly from the central portion 906.
  • each vane of the pair of vanes 908 has a width in the range of approximately 3mm to approximately 12mm.
  • each vane of the plurality of vanes 908 is angled downwardly from the central portion 906 at an angle of approximately 30 degrees to approximately 45 degrees.
  • FIGURE 10 is a top view of a valve 1000 positioned over an orifice 1002 formed in a tray deck 1004.
  • the orifice 1002 includes narrow portions 1003a and 1003b.
  • the valve 1000 includes a central portion 1006 positioned above and in a spaced relationship relative to the orifice 1002.
  • an area of the central portion 1006 is approximately 1.15 to approximately 2.0 times larger than an open area of the orifice 1002. That is an open area of the orifice 1002 is approximately 87% to approximately 50% of the surface area of the central portion 1006 of the valve 1000.
  • An upstream securement leg 1010 and a downstream securement leg 1012 extend from the central portion 1006 and are arranged substantially perpendicular thereto.
  • the upstream securement leg 1010 extends through the narrow portion 1003 a and the downstream securement leg 1012 extends through the narrow portion 1003b. A portion of the upstream securement leg 1010 that extends through the narrow portion 1003a is bent outwardly away from the downstream securement leg 1012. Likewise, a portion of the downstream securement leg 1012 that extends through the narrow portion 1003b is bent outwardly away from the upstream securement leg 1010. The upstream securement leg 1010 and the downstream securement leg 1012 secure the valve 1000 to the tray deck 1004 and prevent removal of the valve 1000 therefrom.
  • each vane of the pair of vanes 1008 extend laterally and downwardly from the central portion 1006.
  • each vane of the pair of vanes 1008 has a width in the range of approximately 3mm to approximately 12mm.
  • each vane of the plurality of vanes 1008 is angled downwardly from the central portion 1006 at an angle of approximately 30 degrees to approximately 45 degrees.
  • FIGURE 11A is a perspective view of a valve 1100.
  • the valve 1100 is disposed in a spaced relationship relative to an orifice 1102 in a tray deck.
  • the valve 1100 includes a central portion 1106, which central portion 1106 is spaced from the orifice 1102.
  • the central portion 1106 exhibits a generally round shape; however, in other embodiments, valves utilizing principles of the disclosure may have central portions of any shape.
  • a vane 1108 is formed around a circumference of the central portion 1106.
  • the vane 1108 is a continuous circumferential vane formed about the valve 1100.
  • the vane 1108 extends outwardly and downwardly from the central portion 1106.
  • the vane 1108 accounts for approximately 5% to approximately 50% of the diameter of the valve 1100.
  • At least one leg 1112 extends downwardly from an edge of the vane 1108.
  • the at least one leg 1112 supports the central portion 1106, and maintains the central portion 1106 in the spaced relationship with the orifice 1102.
  • the at least one leg 1112 includes a tab 1114.
  • the tab 1114 engages a slot 1116 formed proximate to the orifice 1102.
  • the slot 1116 may be formed adjacent to the orifice 1102 or formed within the orifice 1102 as shown by way of example in FIGURE 11 A.
  • the valve 1100 is either a fixed valve or a floating valve.
  • the at least one leg 1112 is a continuous extension of the vane 1108.
  • the valve 1100 includes an improved turning vane 1108 that directs all vapor downwards. By directing all vapor downwards towards the tray deck, contact mixing of vapor within the cross-flow liquid stream is improved.
  • the vane 1108 is angled relative to a top portion of the valve 1100 at an angle of approximately 11° to approximately 79° from horizontal.
  • an outer diameter of the valve 1100 ranges from approximately 152mm to approximately 12mm.
  • the vane 1108 directs ascending fluid downwardly onto the tray deck thereby facilitating fluid interaction.
  • trapezoidal valves there are advantages with respect to anti-fouling systems.
  • a directional vapor component creates a liquid-flow push across the tray at a minimum residence time.
  • the circular valve shape creates a natural balancing of vapor-liquid flow in omnidirectional paths. This results in an effective uniform mixing efficiency.
  • each type of contacting valve has unique, positive attributes to be considered by a designer. Valves having directionally downward deflecting vanes are generally more efficient contacting devices that sieves or valves that lack a vena contracta component.
  • the valve 1100 extends beyond the edges of the orifice 1102 in both a length-wise and a width-wise direction.
  • the central portion 1106 has a surface area that is larger than an area of the orifice 1102.
  • the overall valve area is approximately 1.5 to approximately 4.0 times larger than an area of the orifice 1102.
  • Normal open area of the orifice 1102 is approximately 67% to approximately 37% of the surface area of the valve 1100.
  • the valve cover width to orifice width ratio may range from lower ratio of about 1.25 to a higher ratio of about 2.25.
  • the preferred cap to orifice ratio is in the range of 1.6-2.6.
  • Such an arrangement restricts passage of the lighter fluid ascending through the orifice 1102 and provides proper pressure drop control for design-range requirements.
  • Such an arrangement also allows a larger escape area for ascending fluid thereby increasing capacity resulting from lower velocity escape and reduced spray heights. Chances of fouling are also reduced as a result of the larger escape area.
  • FIGURE 1 IB is a perspective view of a valve 1150.
  • the valve 1150 includes a retainer clip 1152 disposed on each leg 1112 of the plurality of legs.
  • the retainer clip 1152 simplifies installation of the valve 1150 to the tray deck.
  • each leg 1112 of the plurality of legs is inserted into a slot formed in the tray deck adjacent to the orifice. As the leg 1112 passes through the slot, the retainer clip 1152 compresses into the leg 1112.
  • the retainer clip 1152 compresses into the leg 1112.
  • FIGURE 11C is a perspective view of a valve 1170.
  • the valve 1170 includes a retainer tab 1172 disposed on each leg 1112 of the plurality of legs.
  • the retainer tab 1172 simplifies installation of the valve 1170 to the tray deck.
  • each leg 1112 of the plurality of legs is inserted into a slot formed in the tray deck. As the leg 1112 passes through the slot, the retainer tap 1172 snaps into the slot thereby securing the leg 1112 to the tray deck.
  • FIGURE 12 is a top view of the domed valve 1100 showing a relative size of a valve orifice.
  • the valve 1100 is disposed in a spaced relationship relative to an orifice 1102 in a tray deck 1104.
  • the valve 1100 includes a central portion 1106, which central portion 1106 is spaced from the orifice 1102.
  • the central portion 1106 exhibits a generally round shape; however, in other embodiments, valves utilizing principles of the disclosure may have central portions of any shape.
  • the at least one leg 1112 supports the central portion 1106 and maintains the central portion 1106 in the spaced relationship with the orifice 1102.
  • an area of the central portion 1106 ranges from approximately 1.05 to approximately 2.5 times larger than an open area of the orifice 1102. That is an open area of the orifice 1102 is approximately 67% to approximately 37% of the surface area of the valve 1100.
  • a secondary plate is secured to an underside of the tray deck 1104 beneath the orifice 1102. The secondary plate reduces a size of the orifice 1102 relative to the valve 1100 as noted above.
  • a vane 1108 is formed on a circumference of the central portion 1106. The vane 1108 extends outwardly and downwardly from the central portion 1106.
  • the vane 1108 directs ascending fluid in a downward direction thereby creating a vena contracta between a lower edge of the vanes 1108 and the tray deck 1104.
  • Such a phenomenon encourages the ascending fluid to distribute across the tray deck and mix with heavier fluid moving laterally, thereby reducing pressure drop across the valve 1100 and improving the contact efficiency.
  • FIGURE 13A is a cross sectional view of a valve 1302 having a flat top 1304.
  • the flat top of the valve 1302 affects flow of the ascending fluid 1113 therethrough and the flow of the heavier fluid 1115 therearound.
  • FIGURE 13B is a cross sectional view of a valve 1332 having a cone top 1334.
  • the cone top 1334 comes to an apex 1336 at an approximate center of the central portion.
  • the cone-shaped top of the valve 1302 affects flow of the ascending fluid 1113 therethrough and the flow of the heavier fluid 1115 therearound.
  • FIGURE 13C is a cross sectional view of a valve 1352 having a domed top 1354.
  • FIGURE 13D is a cross sectional view of a valve 1392 having a shoulder top 1394.
  • the shoulder top 1394 includes a flat central area 1396 that is generally parallel to the tray deck 1304.
  • An angulated region 1398 extends from the central area 1396 and joins the central area 1396 to the valve legs 1399.
  • the shoulder top 1394 of the valve 1302 affects flow of the ascending fluid 1113 therethrough and the flow of the heavier fluid 1115 therearound.
  • fluid-flow specifications along with mechanical details and manufacturing requirements influence variations of the shape of the valve top.
  • the valve 1302 may be of any shape as dictated by design requirements such as, for example, round, rectangular, square, elliptical, square, or trapezoidal.
  • FIGURE 14A is a top perspective view of a tray 1402 having a plurality of snap-in dome valves 1400 disposed therein.
  • the tray 1402 includes a plurality of apertures 1404 formed therein to facilitate upward movement of fluids.
  • Each valve 1400 is disposed proximate a corresponding aperture 1404.
  • the valve 1400 includes a central portion 1406, which central portion 1406 is spaced from the aperture 1404.
  • the central portion 1406 exhibits a generally round shape; however, in other embodiments, valves utilizing principles of the disclosure may have central portions of any shape such as, for example, rectangular or any other shape.
  • At least one leg 1412 supports the central portion 1406 and maintains the central portion 1406 in the spaced relationship with the aperture 1404.
  • the valve 1400 includes two legs 1412; however, in other embodiment, valves utilizing principles of the disclosure could utilize any number of legs.
  • a vane 1408 is formed on a circumference of the central portion 1406. The vane 1408 extends outwardly and downwardly from the central portion 1406. In a typical embodiment, the vane 1408 directs ascending fluid in a downward direction thereby creating a vena contracta between a lower edge of the vane 1408 and the tray deck 1402. Such a phenomenon encourages the ascending fluid to distribute across the tray deck and mix with heavier fluid moving laterally, thereby reducing pressure drop across the valve 1400 and improving the contact efficiency.
  • heavier fluid flows across the tray 1402 in a direction generally aligned with the at least one leg 1412.
  • the at least one leg 1412 disrupts flow of the heavier fluid 1414 around the aperture 1404 and the valve 1400.
  • the at least one leg 1412 also causes ascending lighter fluid (illustrated by arrow 1416) to escape the valve 1400 in a direction generally perpendicular to the flow of the heavier fluid 1414. In this manner, intimate mixing and mass transfer between the heavier fluid 1414 and the lighter fluid 1416 is promoted.
  • FIGURE 14B is a bottom perspective view of the tray 1402 of FIGURE 14A.
  • the apertures 1404 formed in in the tray 1402 include at least one notch 1418 formed therein.
  • the aperture includes two notches 1418; however, in a typical embodiment, the aperture 1404 includes a number of notches 1418 that corresponds to the number of legs 1412 present on the valve 1400.
  • the leg 1412 is sized so as to be received into the notch 1418.
  • At least one locking tab 1420 extends from the leg 1412 in a perpendicular direction. The at least one locking tab 1420 engages a bottom surface of the tray 1402 and prevents removal of the valve 1400 in an upward direction while allowing the valve 1400 to float vertically relative to the tray 1402.
  • the valve 1400 is oriented with the aperture 1404 such that the legs 1412 align with the corresponding notches 1418.
  • a beveled surface 1422 is formed on a lower aspect of the at least one locking tab 1420.
  • the beveled surface 1422 contacts an upper surface of the tray 1402 and prevents the leg 1412 from being passively inserted into the notch 1418.
  • a downward force is applied to the valve 1400 so as to press the valve 1400 into the aperture 1404.
  • the beveled surface 1422 of the at least one leg 1412 slides against the upper surface of the tray 1402 and causes the leg 1412 to deflect inwardly.
  • FIGURE 15A is a top perspective view of a tray 1500 having a plurality of valve covers 1502 located thereon and secured in place with a three-legged cage 1506.
  • FIGURE 15B is a bottom perspective view of the tray 1500.
  • the tray 1500 includes a plurality of apertures 1504 formed therein.
  • a plurality of retaining cages 1506 are affixed to the tray 1500 such that one retaining cage 1506 is placed proximate to a corresponding aperture 1504.
  • the retaining cage 1506 includes an upper portion 1508 and a plurality of legs 1510.
  • a tab 1505 extends downwardly from each leg of the plurality of legs 1510. The tab 1505 is received into corresponding slots 1507 formed in the tray 1500 adjacent the aperture 1504. Upon receipt of the tab 1505 into the corresponding slots 1507 the tab 1505 may be bent outwardly to secure the cage 1506 to the tray 1500.
  • the cage 1506 includes three legs 1510; however in other embodiments, the cage 1506 can include any number of legs 1510.
  • the upper portion 1508 of the cage 1506 is generally circular and has an opening 1513 disposed in an approximate center.
  • the valve cover 1502 is disposed within the cage 1506 above the aperture 1504.
  • the valve cover 1502 is free to move on an approximate vertical axis towards and away from the aperture 1504; however, the cage 1506 limits the distance of vertical travel of the valve cover 1502.
  • the legs 1510 prevent lateral movement of the valve cover 1502.
  • the valve cover 1502 is dome-shaped and has a height of at least approximately 3/16 inch from an edge of the dome to a central apex.
  • At least one anti-stick tab 1512 may be formed on an outer edge 1514 of the valve cover 1502.
  • the anti-stick tab 1512 prevents the valve cover 1502 from adhering to the surface of the tray 1500.
  • a sharp edge formed on the orifice 1504 and the valve cover 1502 enhances fluid mixing and tray efficiency.
  • FIGURE 16A is a top perspective view of a tray 1600 having a plurality of valve covers 1602 located thereon and secured in place with a four-legged cage 1606.
  • FIGURE 16B is a bottom perspective view of the tray 1600.
  • the tray 1600 includes a plurality of apertures 1604 formed therein.
  • a plurality of retaining cages 1606 are affixed to the tray 1600 such that one retaining cage 1606 is placed proximate to a corresponding aperture 1604.
  • the retaining cage 1606 includes an upper portion 1608, wide legs 1616, and narrow legs 1618.
  • a tab 1605 extends downwardly from each leg of the wide legs 1616 and the narrow legs 1618.
  • the cage 1606 includes four legs; however in other embodiments, the cage 1606 can include any number of legs.
  • the cage 1606 includes two wide legs 1616 and two narrow legs 1618. The wide legs 1616 are arranged opposite each other and are placed generally parallel to a direction of flow of a heavier fluid across the tray 1600 (illustrated by arrow 1620).
  • the narrow legs 1618 are arranged opposite each other and are placed generally perpendicular to the flow of the heavier fluid 1620).
  • the wide legs 1616 block egress of a lighter fluid from the area under the valve cover 1602 (illustrated by arrow 1622).
  • the lighter fluid 1622 thus exits the valve cover 1602 in a direction generally perpendicular to the flow of the heavier fluid 1620. In this manner, intimate mixing and mass transfer between the heavier fluid 1620 and the lighter fluid 1622 is promoted.
  • the upper portion 1608 of the cage 1606 is generally circular and has an opening 1613 disposed in an approximate center.
  • the valve cover 1602 is disposed within the cage 1606 above the aperture 1604.
  • the valve cover 1602 is free to move on an approximate vertical axis towards and away from the aperture 1604; however, the cage 1606 limits the distance of vertical travel of the valve cover 1602.
  • the narrow legs 1618 prevent lateral movement of the valve cover 1602.
  • the valve cover 1602 is dome-shaped and has a height of at least approximately 3/16 inch from an edge of the dome to a central apex.
  • At least one anti-stick tab 1612 may be formed on an outer edge 1614 of the valve cover 1602. In a typical embodiment, the anti-stick tab 1612 prevents the valve cover 1602 from adhering to the surface of the tray 1600.
  • FIGURE 17 is a perspective view of a captive valve 1700 having a securement strap 1702 coupled thereto.
  • the valve 1700 is domed shaped and is free to move on an approximate vertical axis towards and away from an associated aperture formed in a tray.
  • the valve 1700 has a depth of approximately 6 millimeters to approximately
  • the strap 1702 extends over a top of the valve 1700 and restricts vertical travel of the valve 1700.
  • the strap 1702 includes a top section 1708, a first leg 1710, and a second leg 1712.
  • a first notch 1706 and a second notch 1714 are formed in an edge of the valve 1700.
  • the first notch 1706 and the second notch 1714 receive the first leg 1710 and the second leg 1712, respectively. Interaction of the first leg 1710 and the second leg 1712 with the first notch 1706 and the second notch 1714, respectively, prevents rotation or lateral movement of the valve 1700.
  • a first tab 1716 extends downwardly from a bottom of the first leg 1710 and a second tab 1718 extends downwardly from a bottom of the second leg 1712.
  • the first tab 1716 is received into a first slot formed in the tray 1704 adjacent the aperture and the second tab 1718 is received into a second slot formed in the tray 1704 opposite the first slot.
  • the first tab 1716 and the second tab 1718 may be bent outwardly to secure the strap 1702 to the tray 1704.
  • the first leg 1710 and the second leg 1712 are arranged are placed generally parallel to a direction of flow of a heavier fluid across the tray 1704 (illustrated by arrow 1720).
  • the first leg 1710 and the second leg 1712 block egress of a lighter fluid from the area under the valve 1700 (illustrated by arrow 1722).
  • the lighter fluid 1722 thus exits the valve 1700 in a direction generally perpendicular to the flow of the heavier fluid 1720. In this manner, intimate mixing and mass transfer between the heavier fluid 1720 and the lighter fluid 1722 is promoted.
  • FIGURE 18A is a top perspective view of a rectangular captive valve 1800 having a securement strap 1802 coupled thereto.
  • FIGURE 18B is a bottom perspective view of the valve 1800.
  • the valve 1800 is dome shaped and is free to move on an approximate vertical axis towards and away from an associated aperture formed in a tray.
  • the valve 1800 has a depth of approximately
  • the strap 1802 extends over a top of the valve 1800 and restricts vertical travel of the valve 1800.
  • the strap 1802 includes a top section 1808, a first leg
  • a first notch 1806 and a second notch 1814 are formed in an edge of the valve 1800.
  • the first notch 1806 and the second notch 1814 receive the first leg 1810 and the second leg 1812, respectively. Interaction of the first leg 1810 and the second leg 1812 with the first notch 1806 and the second notch 1814, respectively, prevents rotation or lateral movement of the valve 1800.
  • a first tab 1816 extends downwardly from a bottom of the first leg 1810 and a second tab 1818 extends downwardly from a bottom of the second leg 1812.
  • the first tab 1816 is received into a first slot 1824 formed in the tray 1804 adjacent the aperture and the second tab 1818 is received into a second slot 1826 formed in the tray 1804 opposite the first slot 1824.
  • the first tab 1816 and the second tab 1818 may be bent outwardly to secure the strap 1802 to the tray 1804.
  • the first leg 1810 and the second leg 1812 are arranged are placed generally parallel to a direction of flow of a heavier fluid across the tray 1804 (illustrated by arrow 1820).
  • the first leg 1810 and the second leg 1812 block egress of a lighter fluid from the area under the valve 1800 (illustrated by arrow 1822).
  • the lighter fluid 1822 thus exits the valve 1800 in a direction generally perpendicular to the flow of the heavier fluid 1820. In this manner, intimate mixing and mass transfer between the heavier fluid 1820 and the lighter fluid 1822 is promoted.

Landscapes

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

Abstract

La présente invention concerne un plateau à clapets destiné à être utilisé dans une colonne de procédé chimique. Le plateau à clapets comprend une pluralité d'ouvertures formées en son sein. Une pluralité de clapets sont maintenus à une certaine distance des ouvertures individuelles de la pluralité d'ouvertures. Une aire des ouvertures individuelles est inférieure à une aire des clapets individuels de la pluralité de clapets.
EP18744141.5A 2017-01-27 2018-01-26 Procédé et système de régulation des pertes de charge à travers des clapets par des orifices Pending EP3606632A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201762451400P 2017-01-27 2017-01-27
US201762484688P 2017-04-12 2017-04-12
PCT/US2018/015483 WO2018140751A1 (fr) 2017-01-27 2018-01-26 Procédé et système de régulation des pertes de charge à travers des clapets par des orifices

Publications (2)

Publication Number Publication Date
EP3606632A1 true EP3606632A1 (fr) 2020-02-12
EP3606632A4 EP3606632A4 (fr) 2021-03-03

Family

ID=62978846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18744141.5A Pending EP3606632A4 (fr) 2017-01-27 2018-01-26 Procédé et système de régulation des pertes de charge à travers des clapets par des orifices

Country Status (3)

Country Link
EP (1) EP3606632A4 (fr)
CA (1) CA3065500A1 (fr)
WO (1) WO2018140751A1 (fr)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE588502A (fr) *
US2710177A (en) * 1952-04-07 1955-06-07 Braun & Co C F Bubble cap assembly with choke
US2819050A (en) * 1954-03-08 1958-01-07 Koch Eng Co Inc Check valve for rectifying column
DE1054418B (de) * 1954-03-08 1959-04-09 Koch Eng Co Inc Haltevorrichtung fuer Verschlussdeckel von Schwimmerventilboeden in Kontaktsaeulen
US2979316A (en) * 1957-10-10 1961-04-11 Phillips Petroleum Co Liquid and gas contacting apparatus
US3037754A (en) * 1959-03-23 1962-06-05 Fritz W Glitsch & Sons Inc Closures for fluid contact apparatus
US3080155A (en) * 1960-01-18 1963-03-05 Fritz W Glitsch & Sons Inc Flow control means
NL136694C (fr) * 1960-09-30 1900-01-01
NL271575A (fr) * 1960-11-21
US8944419B2 (en) * 2010-05-11 2015-02-03 Sulzer Chemtech Ag Contact tray for a mass transfer column
WO2016051372A1 (fr) * 2014-10-04 2016-04-07 Jayawant Ravindra Clapet à bouchon flottant et dispositif de retenue pour déploiement dans des plateaux à clapets de colonnes de distillation
US10065131B2 (en) * 2014-11-25 2018-09-04 Gti Solutions International, Llc Liquid-gas exchange device and separation method
EP3319702A1 (fr) * 2015-07-08 2018-05-16 Koch-Glitsch, LP Plateau de contact à clapets pour colonne de transfert de masse

Also Published As

Publication number Publication date
CA3065500A1 (fr) 2018-08-02
WO2018140751A1 (fr) 2018-08-02
EP3606632A4 (fr) 2021-03-03

Similar Documents

Publication Publication Date Title
US10561961B2 (en) Fluid dispersion unit with directional component vector
US8540218B2 (en) Fluid dispersion unit assembly and method
EP0386961B1 (fr) Colonne de procédé
US5120474A (en) Valve-tray assembly
US5164125A (en) Method and apparatus for downcomer-tray operation
CA2157627C (fr) Ensemble de plateaux de contact et methode correspondante
US5547617A (en) Apparatus for increasing effective active area
EP0583914B1 (fr) Plateau recouvert de catalyseur avec un tuyau d'écoulement pour une colonne à procédé chimique
US5147584A (en) Contact tray assembly and method
US5192466A (en) Method of and apparatus for flow promotion
US5106556A (en) Method of downcoer-tray vapor venting
JP3551383B2 (ja) 気−液接触装置のための高能力トレー
US11958001B2 (en) Method and system for orifice control of valve pressure drop
US20160038851A1 (en) Method and system for orifice control of valve pressure drop
US10596483B2 (en) Aperture layout for vapor-liquid contact tray
US6460833B2 (en) Gas-liquid contacting column
US20210299589A1 (en) Method and system for orifice control of valve pressure drop
US3940462A (en) Bubble tray and cap assembly for fluid contact apparatus
EP3606632A1 (fr) Procédé et système de régulation des pertes de charge à travers des clapets par des orifices
EP0381388A2 (fr) Plateau pour mettre en contact gaz et liquide
WO2001060484A1 (fr) Plateau liquide/gaz

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20191120

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SULZER MANAGEMENT AG

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
RIN1 Information on inventor provided before grant (corrected)

Inventor name: FLEMING, PHILLIP, BRADLEY

Inventor name: BURTON, LARRY, W.

Inventor name: BINKLEY, MICHAEL, J.

A4 Supplementary search report drawn up and despatched

Effective date: 20210202

RIC1 Information provided on ipc code assigned before grant

Ipc: B01D 3/16 20060101AFI20210127BHEP

Ipc: B01D 3/32 20060101ALI20210127BHEP

Ipc: B01D 3/22 20060101ALI20210127BHEP

Ipc: B01D 3/20 20060101ALI20210127BHEP

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230608