internals for packed columns

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Sulzer ChemtechInternals for packed columns0699 2501IntroductionThis brochure provides an overview of Sulzer Chemtech Column ln-ternals, which have be developed in Sulzer Chemtech's extensive test facility and used in commercial applications for many years. The fol-lowing pages will provide you with detailed information on our inter-nals for structured and random packings.At Sulzer Chemtech, decades of design, construction and manufac-turing experience are combined with on-going development and sta-te-of-the-art production methods to guarantee you products of the highest possible quality.ln order to comply with your specific requirements, our sales engi-neers and specialists will always be ready to discuss detail inquiries with you personally.We look forward to working with you to develop a customized packed tower solution that will exceed your expectations. Page Introduction 2 Column types 3 Liquid distributors 4 Selection of liquid distributors 4 Splash-plate distributor VEP 5 Channel-type distributors VKG and VKR 6 7 Collector / distributor VS 8Distributors for corrosive media 9 10Distributors for further applications 11 13Distributor hole size 14Liquid collectors 15 16Support and locating systems 17Gas / Liquid inlet systems 18 19Table of contents2Column type When preparing column internals specifications, you must know whether you will be using a flanged column or a welded vessel. lf your column is a welded vessel, then you must know the inside diameter of the manhole.Prior to beginning engineering of your column and internals, Sulzer Chemtech will verify with you the overall column height, and the man-hole inside diameter.Flanged columnsPackings and internals are instal- led through the column flange.Welded vessel columnsPacking and segmental internals are installed through manholes.Internals for packed columns30600 2508-4 0600 2508-22001001.00.5fi0.25 0.8 4.0 8.050 : 20Selection of liquid distributorsFor every process application, Sul-zer Chemtech can offer you a so-lution fitted to your own particular needs.When selecting the optimal dis-tributor, professional advice from Sulzer Chemtech's specialists is always valuable. Our decades of experience and well-founded ex-pertise make your distributor selec-tion decisions easy.Peak performance of your column is achievable only if you precise-ly match your column internals to both your packings and their spe-cific process application.The following chart shows a choice of Sulzer Chemtech distributors to match your own particular liquid loading and column size. Sulzer Chemtech specialists will help you select just the right liquid distributor for your process application.These distributors are suitable for most applications. For very difficult applications, Sulzer Chemtech can provide customdesigned distributors that will fit your specific requirements.Liquid distributorsColumn diameter (m)Specific liquid load (m3/m2h) 1) Can be supplied in a flanged version, also for diameters > 0,8 mCollector/distributor, VSChannel-type distributor, VKGChannel-type distributorLow-liquid load distributor, VKRPW1)Splash-plate distributor, VEPWSplash-plate distributor, VEPHigh-liquid load distributor, VKH/VEHVKG1) VKR1)40600 2512-30600 2503-30600 2507-20600 2507-6Midget load distributor VEPK SpecicationsDiameter > 0.8 m Liquid load 0.5 to 30 m3/m2h vEPW: 0.1 to 1.0 m3/m2h Drip-point density 40 to 200 drip points per m2 Turndown ratio 3:1 max. Gas load F-factor up to 4.5 Pa1/2 Sensitivity to contamination Slight Construction details Can be levelled by a device supported on the packing Special note lf required, this distributor can be constructed as a self-supporting unit (e.g. for use with random packings) Splash-plate distributor VEPThe splash-plate distributor vEP is Sulzer Chemtech's most widely used distributor.lts patented discharge system has several advantages:Fewer lateral holes, due to the sprea-ding effect of the splash-plate.Larger hole diameters than conven-tional discharge systems.Anti-plugging, due to large holes and the lateral discharge of liquid.The feed liquid is pre-distributed at a precisely controlled rate from a main channel (mounted above) into the individual arm channels.Splash-plate distributor VEPWFor low liquid flow rates, the special splash-plate distributor vEPW is used to accommodate liquid loads as low as 0.1 m3/m2h.Low pressure drop and no entrain-ment up to F 4.5 Pa0.5Liquid distributorsDischarge system vEP50600 25140600 2503-3Channel-type distributor with bottom holes VKGThe channel-type distributor vKG has been successfullly used for many years in columns up to 2 m diameter.lt is one piece distributor with in-tegral channels attached, suitable for installation through a remo- vable head of a vessel. A segmental version can be installed through a manhole in larger vessels.The liquid is fed into a large center channel, then distributed through holes in the individual channel bot-tom onto the packing. The vKG dis-tributor is not recommended at low liquid loads when suspended solids are present.Discharge system vKGLiquid distributors Specications Diameter 0.25 to 2.0 m; flanged design above 0.8 m Liquid load 1 to 100 m3/m2h Drip-point density 40 to 200 drip points per m2 Turndown ratio 3:1 max. Gas load F-factor up to 4.5 Pa1/2 Sensitivity to contamination At low liquid loads Construction details Can be levelled by means of locating or suspension device Special note ln addition, a pre-distribution system is used at high liquid loads and larger column diameters 60600 2507-70600 2507-6 vKR Discharge system vKRPWLiquid distributors SpecicationsDiameter > 0.25 m Liquid load 1 to 20 m3/m2h for vKR; 0.05 to 1 m3/m2h for vKRPW Drip-point density 40 to 200 drip points per m2 Turndown ratio 3:1 max.; multiple-stage distributor, 10:1 Gas load F-factor up to 5 Pa1/2 for vKR; up to 3.5 for Pa1/2 for vKRPW Sensitivity to contamination Slight Construction details Can be levelled by means of locating or suspension device Special note The low-liquid load distributor is constructed in diameters up to 4 m 7Channel-type distributor with lateral tubes VKRThe channel-type distributor vKR resembles the distributor vKG ex-cept that it uses tubes at the side of the channels rather than holes in the channel bottom to distribute the liquid onto the packing. This fea-ture makes the distributor vKR less susceptible to plugging.The multiple-stage version is able to handle broad liquid loading ranges, up to 10:1. The range of liquid loa-ding must be carefully considered when designing a distributor vKR.Low-liquid load distributor VKRPWFor extremely low-liquid loads, the special channel distributor vKR-PW is used to accommodate liquid loads as low as 0.05 m3/m2h. lts has a supplemental liquid distribution system beneath each tube to dis-tribute extremely low liquid volume evenly to the packing.0601 25030601 2501 0600 2507-10Collector / distributor VSThe collector/distributor vS is used whenever collection and redistribu-tion of liquid is required at very high liquid loads. lt resembles a chimney tray; however the chimney arrange-ment is custom designed for your application's liquid distribution and pressure drop requirements.For moderate liquid loads applica- tions, where liquid mixing is impor-tant, a separate accumulator tray must collect the liquid and feed it to a liquid distributor located below it.Liquid distributors8 Specications Diameter 0.25 - 8.0 m Liquid load >30 m3/m2h Drip-point density 40 to 160 drip points per m2 Turndown ratio 3:1 max. Gas load F-factor up to 3 Pa1/2 Sensitivity to contamination Slight Construction details Tray construction, bolted and supported on ring with chimney types corresponding to hydraulic requirements Special note Truss supports are used in large column diameters0600 2512-3Plastic distributorThe bottom-hole distributor vEG and the channel-type distributor vKR are available in PP, PvDF, PvC, and other plastic materials.The maximum operating tempera-ture is 60 to 100 oC depending on plastic material.Graphite distributor VSTGThe one-piece distributor vSTG is constructed of graphite for use in highly corrosive environments. lt uses tubes with lateral outlets to distribute the liquid onto the pa-cking. lt is installed in flanged co-lumn only.Graphite distributors vSTG can be used to collect and redistribute li-quids between packed sections.Liquid distributors for corrosive media SpecicationsDiameter 0.25 - 6 m Liquid load 1 - 20 m3/m2h Drip-point density 80 to 200 drip points per m2 Turndown ratio 3:1 max.; multiple-stage, 10:1 Gas load F-factor up to 4.5 Pa1/2 Sensitivity to contamination Slight for vKR Construction details Supported on the packing 9 SpecicationsDiameter 0.25 - 1.6 m Liquid load 1 to 20 m3/m2h Drip-point density 40 to 160 drip points per m2 Turndown ratio 3:1 max., multiple-stage, 10:1 Gas load F-factor up to 3 Pa1/2 Sensitivity to contamination Slight Construction details Supported on the packing 0600 2503-70600 2512-1Glass distributor VRGGThe distributor vRGG is made of glass for use in small columns. The paten-ted closed tube discharge system has special outlets on the under-side of the distribution tubes to dis-tribute the liquid onto the packing.lt is a one-piece distributor that can be installed through a column flange by following the prescribed installa-tion procedures.Liquid distributors for corrosive media SpecicationsDiameter 0.25 - 1.2 m Liquid load 1 to 20 m3/m2h Drip-point density 40 to 200 drip points per m2 Turndown ratio 3:1 max. Gas load F-factor up to 4.5 Pa1/2 Sensitiv

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