Mist Eliminators For Minimizing Entrainment
Mist eliminatorsFor minimizing entrainment
RVT Process EquipmentAbout usRVT Process Equipment hasoffered a full array of productsand services to the Chemical andOil & Gas Processing industriesfor more than 40 years.An expert in the field ofmass transfer equipmentIn addition to a complete line ofmass transfer equipment consistingof random/structured packings,column internals and fractionationtrays, RVT Process Equipment offersboth wire mesh and vane type misteliminators. We have a proven recordof delivering quality products inan unrivaled variety of materials towell-known global companies. Ourexperienced engineers and internalsspecialists provide complete supportfor our customers.Worldwide there for youOur global headquarter is locatedin Germany with subsidiaries in theUnited States (RVT Process Equipment, Inc.) and China (Kunshan RVTProcess Equipment Co, Ltd.). Furthermore, RVT Process Equipmentworks with 19 agents and distributors around the world.Our German facilities in Steinwiesen(headquarter, left) and Marktrodach(production & warehouse, right)2Quality control frommanufacturing to the customerRVT Process Equipment isDIN ISO 9001 and 14001 certified.The qualification of our employees inthe fabrication facility complies withstrict workmanship and qualitycontrol standards, thus assuringhigh quality.We are furthermore a specializedindustrial fabricator per § 19 WHG(German Law for Water Protection).
Mist eliminatorsDesign principles and typesMist eliminators are employed atthe top of a packed column or inconjunction with a collecting traybetween two packed beds.They separate liquid droplets fromthe gas stream. Droplet dischargefrom the column and/or the liquidentrainment from one stage to thenext is minimized.Wire mesh mist eliminator(Type M950)Droplet separation is achievedutilizing the mass inertia of theliquids. For this reason, dropletremoval efficiency declines withsmaller droplet diameter.Wire mesh mist eliminatorsoperate by droplet coalescence.As the droplets hit the mesh,they stick to the wires and grow.They are able to discharge from themist eliminator via gravity. Thesemist eliminators are recommendedfor systems where no solidsbuildup is expected.In vane type mist eliminators, thegas flow is deflected several timeson guide plates so that the liquiddroplets impinge on impact. Theythen flow from these surfaces in adownward direction.Vane type mist eliminator(Type M960)Scaling of solids can be avoidedor reduced with the use of spraynozzles located above or belowthe mist eliminator.3
Wire mesh mist eliminatorsM950 / P950Wire diameter, surface area,mesh thickness, and interfacialsurface tension between the fibreand the collected liquid are theprimary variables to consider inspecifying a wire mesh pad.Wire mesh mist eliminatorsprovide a high separationefficiency at the lowestinstallation costs.They are usually comprisedof multiple, compressed layersof thermoplastic or metal wire,and deliver excellent resultsover a broad range of gas/liquid separation tasks.It is also possible to combine wiremesh mist eliminators with vanetype ones. These combined systemshelp to optimize the benefits ofindividual types of equipment andimprove overall performance.A good design starting point wire mesh mist eliminatorsIn this case, the mesh serves asa preconditioner to the fine mistgas, forming larger droplets (coalescence) for the vane type mistelimination process.Our wire mesh mist eliminatorsare made in any size and shapefrom a wide range of materials,both metal and non-metal.Among others PP, PFA, ECTE,ETFE, PVC, steel, alloys, andtitanium.RainDropDrizzleMistFogDifferent droplet sizesdifferent mist eliminatoroptionsIn a broader sense, droplet sizedetermines the type of mist eliminator to be used in a process.Wire mesh mist eliminatorsWhereas mesh type misteliminators target smaller dropletdiameters using direct interception,vane type mist eliminators are thecorrect choice for larger diameters,setting up a barrier for the inertialimpact with the droplets.Vane type mist eliminatorsFiber bedmist eliminators5002001005020105Particle Diameter (µm)4Wire mesh mist eliminatorout of fine grain silver withan open area grid out of PTFE210,5To make the best choice for yourparticular application, expertsfrom RVT Process Equipment willhelp at each step from design toconstruction.
Vane type mist eliminatorsM960 / P960To ensure a reliable operationof your column, it is essentialto choose the right design andmaterial of your mist eliminator.RVT offers many design variationsand each can be adjusted to yourspecific needs, includingdifferences in:Vane spacingNumber of bendsAngle of bendsCapture hooksDrainage hooksA metal double-pocket M960-RH900high-performance vane type mist eliminator.Besides the various designs,RVT also offers mist eliminators constructed out of different materials.The most common are any form ofmetal or plastic.Our specialists will advise the mostsuitable material for your application.Available materials include, but arenot restricted to:Polyethylene (PE)Polypropylene (PP)Polyvinylidene fluoride (PVDF)Stainless steelCarbon steelThe P960-RV400 is a RVT standard profilefor a vertical gas flow.Nickel-based alloysTitaniumOther special materials availableupon request5
Vertical or horizontalGas flow optionsVane type mist eliminators can be installed in a variety of ways:Vertically, horizontally, or at any other angle. In most cases, gas flow iseither vertically upwards, with the liquid draining counter-current to thegas flow, or horizontally sidewards, with the liquid draining in a directionperpendicular to the gas flow.Vertical flowIn vane type mist eliminators witha vertical gas flow the vanes arearranged horizontally or in a rooftype installation at a slight angle tothe horizontal.Since the gas flows in anupward direction, the vanes mustbe designed so that certain regionsare bypassed by the gas flow. In thisway, zones are created in which thedroplets can be collected withoutinteraction with the gas.These zones also provide a securedivergence of the collected liquidfrom the surface of the vanes.As the liquid flows in the oppositedirection to the gas, the film of liquidthat forms on the vane has to beconverted back to droplets.To prevent re-entrainment of liquid,the newly formed droplets mustbe substantially larger than thosecarried into the separator by the gas.Typical vertical flow misteliminators are:RV200RV271RV400Vertical flow at the RV200 type profileHorizontal flowVane type mist eliminators forhorizontal gas flow consist of alinear row of vertical vanes.When the flow of gas is horizontal,the vanes stand vertically and theliquid film that occurs flows downon them. The provision of calmedregions behind the phase-separationchambers allow the liquid to drain offwithout making contact with the gas.Typical horizontal flow misteliminators are:RH 100Horizontal flow at the RH100 type profileRH 200RH 300RH 50XRH 60X6
Vane type mist eliminatorsOverviewOur range of vane typemist eliminator productsProfilePlasticP 960MetalM 960FlowDirectionSpecial FeaturePressureDropRH 100RH 100HorizontalHandles a wide gas flowvelocity range. Highseparation capacity andlow fouling tendency.Very low-RV 200VerticalStandard profile with highseparation capacity andlow fouling tendency.Excellent cost-benefit ratio.Very low-RV 271VerticalEnhanced version of the RV 200with additional V-shaped channelsfor controlled and moreefficient drainage.LowRH 350RV 350-Horizontal/VerticalImproved separation efficiencythrough diametrically opposedhooks and variable distancesof separation profiles.ModerateRV 400RV 400VerticalVery low fouling tendency andeasy to clean. Lots of possibleapplications due to variablepackage lengths and distances ofseparation profiles.Very low-RH 50XHorizontalVariable number of divisions (X)and phase separation chambers.Low-RH 60XHorizontalVariable number of divisions (X)and phase separation chambers.LowRH 900RV 900DoublePocketRH 900RV 900DoublePocketHorizontal/VerticalHigh separation capacity. Lotsof possible applications due tovariable package lengths anddistances of separation profiles.ModerateMore materials and profiles are available upon request. For an inquiry, please send your datato info@rvtpe.de, or call one of our sales agents directly for assistance at 49 ( 0 ) 9262 77-0.7
RVT Process Equipment GmbHRange of productsThe way toRVT Process EquipmentB4igA9LudwigsstadtB 89LobensteinEisfeldBadNeustadta.d.SaaleColumn internals/ LeipzB 85BerlinA 73MeiningenStructured packings formass and heat transferSaalfeldErfurtSuhlnachB 19EiseFuldaKassel / reHannovTower packings formass and heat transferSteinwiesenHofNailaCoburgB 279LichtenfelsB 303A7StaffelsteinSchweinfurtExitNailaB 173KronachB4B 303B 173B 279B 85B 303KulmbachBadBerneckA 73A 70A 70Mass transfer gWürzburgA9B 505PegnitzA3Frankfurt/KölnBiologicalcarrier mediaExitBadBerneckBayreuthWerneckA 73IntersectionBiebelriedA3ErlangenB 85A7A9B 470FürthMünchenartgutStStuttgartA3RegensburgOur addressesRVT Process Equipment GmbHPaul-Rauschert-Straße 696349 SteinwiesenGermanyRVT Process Equipment, Inc.9047 Executive Park DriveSuite 222Knoxville, TN 37923, USAPhone 49 ( 0 ) 9262 77-0Fax 49 ( 0 ) 9262 77-771E-Mail info@rvtpe.dePhone 1 ( 865 ) 694-2089Fax 1 ( 865 ) 560-3115E-Mail info @ rvtpe.netRVT Process Equipment GmbHOffice FrankfurtIndustriepark Höchst · D70665928 Frankfurt am MainGermanyKunshanRVT Process Equipment Co., LtdNo. 66 - 68, Shaojing RoadDevelopment Zone KunshanKunshan, Jiangsu 215300P.R. ChinaFon 69 (0) 305 120-90Fax 69 (0) 305 120-91E-Mail info.frankfurt@rvtpe.dewww.rvtpe.comA6Phone 86 ( 512 ) 55 18 82 52Fax 86 ( 512 ) 55 18 81 87E-Mail postmaster@chinarvtpe.cnThe Information in this leaflet are generally correct, howeverit is not possible to lay claim to liability or guarantee.Combustion plantsfor the disposalof exhaust air,waste gasesand liquid mediaA6Mist eliminators05 / 2017Ammonia recoveryprocessestNürnbergTurn-key units forwaste gas scrubbing
Mist eliminators Design principles and types Vane type mist eliminator (Type M960) Wire mesh mist eliminators operate by droplet coalescence. As the droplets hit the mesh, they stick to the wires and grow. They are able to discharge from the mist eliminator via gravity. These mis
Oil Mist Catalog 3 There are two techniques of applying oil mist lubrication to machine elements: Pure Mist and Purge Mist Pure Mist In the pure mist technique, the oil mist is supplied to a bearing housing which has been completely drained of oil. Purge Mist In the purge mist technique, the oil mist is conveyed into the vapor space above theFile Size: 1MB
series Mist Eliminators collects smaller, lighter weight particles far more effi ciently than conventional fi ltration media. Mechanical Mist mean size is 2.5 microns (0.0025mm) Condensation Mist mean size is 1.0 microns (0.001mm) Chemical Reaction Mist mean size is 0.3 microns (0.0003mm)
Level 2 - Experimental Re-entrainment Risk Assessment Level 3 - Qualitative based on known emissions Re-entrainment Risk Assessment Level 4 - Expert Re-entrainment Risk Assessment Level 0 - Observation for Re-entrainment Risk Assessment The intent of this assessment is to walk the building and look at the exhaust points in relation to the air
BRINK MIST ELIMINATORS – QUALITY, SERVICE, TECHNOLOGY Dr. Joseph Brink developed the rst ber bed mist eliminator in 1958. ese rst mist eliminator devices were developed to solve air pollution issues in phos- phoric acid plants. e positive results of this pione-
continuous blades (baffle type mist eliminators with separate blades are not acceptable). The exit section of the first mist eliminator chevron shall be constructed with a straightening section and/or oriented such that the flue gas leaves in the essentially the same direction as it entered the mist eliminator.
Mist eliminators have evolved over the years from packed bed types to knittedmesh mist collectors. Knitted mesh mist eliminators achieve much greaterefficiency than the packed bed types where dumped packing is used as acollection device and impingement types where wave-like plates are used tocollect mist.
Geometry of mist eliminator. (a) Reference mist eliminator, (b) Mist eliminator with perforated plates. Table 1. Detailed dimensions of the mist eliminator. Parameter Reference Mist Eliminator Mist Eliminator with Perforated Plates ɵ 45 45 a 8.6 mm 8.6 mm b 4.3 mm 4.3 mm c - 8.6 mm d 118.5 mm 118.5 mm g - 4.3 mm w 150 mm 150 mm
This section contains a list of skills that the students will be working on while reading and completing the tasks. Targeted vocabulary words have been identified. There are links to videos to provide students with the necessary background knowledge. There is a Student Choice Board in which students will select to complete 4 out of the 9 activities. Student answer sheets are provided for .
