Plastic Packed Tower Internals - Koch-Glitsch | …

1 Plastic Packed Tower InternalsKoch- glitsch s dedication to state-of-the-art mass transfer equipment has produceda complete line of Plastic Packed has been achieved by 20years of testing and supplying INTALOX Distribution Systems. By understanding theimportant role that liquid and vapor distri-bution plays, Koch-Glitsch can designpacked columns to deliver predictable Packed Tower Systems combine INTALOX liquid and vapor distribution with FLEXIPAC StructuredPacking,INTALOX SNOWFLAKE andBETA RING High Performance RandomPacking, and CASCADE MINI-RINGS High Capacity Random also offers traditional internalsfor Packed towers used in less demandingservices. Refer to pages 3 and 4 for a discussion of the importance of liquid andvapor distribution and the requirements to consider when selecting INTALOX ortraditional Internals described in this brochure can be manufactured from all formableand weldable sheet thermoplastics,including PTFE, and many thermosettingfiber-reinforced versions of many of the distributorsdescribed in this catalog are also available ina variety of metal materials.

2 Contact yourKoch- glitsch representative to determine ifthere is a comparable metal packing and torequest the metal packing brochure(KGMTIG).For column packings, the followingbrochures are available: Plastic Packing - KGPP IMTP Random Packing - KGIMTP Metal Random Packing - KGMRPD evice Type and Description Old NorPro Old koch Old glitsch PageModelModel Model ModelINTALOX Liquid DistributorsTP & TS206 Orifice Pan 1065TP & TS236 Channel Elevated Orifice5TP & TS276 Bottom Orifice Trough 1366 INTALOX RedistributorsTP & TS207 Orifice Pan1075TP & TS237 Channel Elevated Orifice1375 Traditional Liquid DistributorsTP & TS905 V-notch Riser Pan7987TP & TS906 Bottom Orifice Pan845 DRO-6017 TP & TS985 Weir Trough806 310 VDN-701,7118TP & TS916 Bottom Orifice Deck816,916 301A,B,C RTD-551,5538TP & TS976 Bottom Orifice Trough9 Traditional Liquid RedistributorsTP & TS917 Bottom Orifice Deck817, 917 301 A,B,DRTD-552.

3 5548 Enclosed Liquid DistributorsTP & TS941 Ladder Arm 844342 POH-90110TP & TS943 Spray Nozzle1044344 SNH-951-X10 Liquid Feed DevicesTP & TS219 Feed Pipe119,12911TP & TS719 Feed Pipe719,72911TP & TS239 Bayonet Feed Pipe12 Packing Bed LimitersTP & TS803 Structured Packing133403 HDG-42113TP805 Random Packing10310414TP & TS825 Random Packing,Wall Attached823 BLM-42114 Packing Support PlatesTP & TS814 Random Packing/Gas Injection818101 UTS-21815TP & TS804 Random Packing/Gas Injection804101 RUTS-20116TP & TS802 Structured Packing134102 HPS-12116TS834 & TS844 Random Packing/Gas Injection819,1019103 UTS-20917TP & TS854 Heavy-duty Random Packing/Gas Injection18- Prefix TP refers to thermoplastic Prefix TS refers to thermoset materials, commonly called FRP or bl e of Contents1 Plastic Tower Internals GuidePlastic Tower Internals are available in thermoplastic [TP] and fiber-reinforced thermoset [TS] materials.

4 Product model numbersare prefixed with the material type. For example, Model TP206 isthe model number for a thermoplastic Model 206 orifice-pan TP materials: Polypropylene [PP] Polyethylene [PE] Polyvinylchloride [PVC] Chlorinated Polyvinylchloride [CPVC] Polyvinylidene Fluoride [PVDF] Polytetrafluoroethylene [PTFE] Ethylene-chlorotrifluoroethylene [ECTFE]Other materials are available upon all models are available in PTFE because of manufacturingprocess limitations for this Limits for TP materialsThe table below shows approximate temperature limits for thermoplastic Internals . Span in the column, process operating temperature, and loads determine the life of an plastics deform under stress over time. In many cases,heavy-duty designs are used to obtain reasonable service life of the TS materials: Polyester (such as Atlac 382-05A, Hetron 700, Dion 6694) Vinyl Ester (such as Derakane 411-350, Atlac 580-05A,Hetron 922, Dion 9100, Corezyn)Other materials are available upon fabrication process for TS materials includes: A reinforcing mat for all resins listed above is of corrosion resistant "E" type glass fibers.

5 The standard curing system is MEKP/Cobalt Napthenate for polyesters, vinyl esters, and high temperature vinyl common curing systems include BPO/DMA or CHP/Cobalt Napthenate. Exposed surfaces can be covered with one ply of Nexus (R) veil (this is the standard for Koch-Glitsch in the United States).Two plies are optional. "C" glass veil is available for certain services. Cut edges and weld joints are sealed with a gel coat of cured resin as multi-piece distributors, redistributors and feed devices requiring gasketed joints, many choices of gasket material areavailable. The gasketing must be of a soft material to be PTFE gasketing is standard, but other materials can be supplied. Flange gaskets are supplied as standard only when bothmating flanges are part of the a flange gasket is to besupplied for mating to vessel flanges, the gasket must be for specific sizes for pipe flanges, all thermoplastic fastenerswill be 1/2in.

6 [M12] unless otherwise specified. On TS models, thestandard bolting is Polypropylene. Other thermoplastic or metal materials can be ClampsLedge clamps can be supplied in thermoplastic, thermoset, or best choice for a given service may not be the samematerial as the rest of the of SupplyFor the Internals in this brochure, Koch-Glitsch supplies all removable parts except for support beams and some gasketing(refer to the Gasketing section on this page). The Internals do notinclude vessel attachments for connection or support, althoughthese may be quoted and supplied separately. Examples of vesselattachments that may be required are: Support ledges Sump frames internal flanges at feed inlet nozzles Wall clips for supportUp to 18[Up to 457] [458 615] [616 1225] [1226 1835] [1836 2450] [2451 3670] [3671 4285] [4286 5495] [5496 6110] Internals Resting onor Clamped [20] [25] [40] [50] [65] [75] [90] [100] [115] Internals Through-Bolted orUsing [40] [40] [50] [50] [65] [75] [90] [100] [115]Materials of Construction and Mechanical DetailsAll dimensions are expressed as inches [millimeters]If the ledge size is other than listed above, special considerationmust be given to the plate diameter and vessel w e r I DMinimum Ledge Widths2 Material Approximate Operating Temperature F [ C]PP 180 [82]PE 155 [68]PVC 150 [66] CPVC 155 [68]

7 PVDF 230 [110]PTFE 392 [200]Liquid Distribution Liquid distributors are used above eachbed of packing in a Packed column toprovide uniform liquid distributor, depending on its design features, is generally located 6 to 8 in.[150 to 200 mm] above the distributor type determines verticalspacing and the proper distance neededto disengage the vapor phase from thepacking before the vapor passes throughthe distributor gas passage ideal distributor has the followingattributes, each providing a specific effecton the overall performance of the packedtower: Uniform liquid distribution Resistance to plugging or fouling Wide operating range Low vapor phase pressure drop Minimal use of vessel height Strength for long life without saggingThese important attributes are well understood by Koch-Glitsch and have been incorporated in Koch-Glitsch distributors since the 1980s.

8 They are an integral part of design of the plasticINTALOX offers two categories of liquid distributors to meet the require-ments of various services: INTALOX Distributors Traditional DistributorsIn choosing which category to use, it isimportant to know whether the liquiddistribution quality will significantly affectthe overall Tower DistributorsINTALOX distributors are designed tohigh standards of distribution uniformity,with emphasis on a uniform pattern ofdistribution points and minimal variationof flow among points. They provide distribution quality close to that achievedin metal high-performance Plastic INTALOX distributors are used for absorption services with multiple transfer units,solvent desorption back pressure, close approach to phase equilibrium,or minimal solvent columns can be sensitive to liquiddistribution quality. In stripping and heattransfer services, similar issues of phaseequilibrium and close temperatureapproach indicate INTALOX distributorsshould be challenging services often usethe best packing, INTALOX distributorsare used with FLEXIPAC structuredpacking, INTALOX SNOWFLAKE andBETA RING high performance randompacking, and CASCADE MINI-RINGS high capacity random packings may be used withINTALOX distributors, such as when aprocess is licensed and specified with acertain type of DistributorsTraditional distributors generally have lessuniform distribution patterns and moreflow variation between distribution columns that are not sensitive to liquiddistribution quality, they may be used fortheir versatility, fouling resistance, or Plastic traditional distributorsare used for absorption services with fewtransfer units, no solvent desorption "backpressure.

9 " no significant approach to equilibrium, or excess solvent columns are generally insensitiveto liquid distribution quality. In strippingand heat transfer services, similar issuesof no "back pressure," excess quench liquid, or wide temperature approachesindicate that traditional distributors willwork simpler services often use long-established packings, traditional distributors are often used withFLEXIRING Packing and Super INTALOX performance packing may be usedwith traditional distributors when onlycertain aspects of high-performance packing are desired. Examples includeuse of INTALOX SNOWFLAKE packingfor its high capacity or use of FLEXIPAC structured packing for its low pressuredrop. In addition, severely fouling services may require large weirs,which are available only with are six reasons to separate a singlepacked bed into two Packed beds andredistribute the liquid: Feed introduction Product side draw High transfer unit count Desire to cross-mix the liquid Liquid maldistribution Physical weight of the Packed bedA conservative rule-of-thumb is to limit a single Packed bed of Plastic packing to no more than 10 transfer addition, the depth of a single bedshould be no more than 15 times the column diameter.

10 Both of these limits can be exceeded in some redistribution in columns with multiple Packed beds can be accomplished by either of the following methods: Using a liquid collector plate below theupper bed to feed a liquid distributor that is located above the lower bed. Using a liquid redistributor between the beds to combine the liquid collection and distribution into one device, as illustrated on page DistributorsLiquid RedistributionDistribution Point DensityThe density of the distribution points can affect the efficiency of the top of apacked bed. For example, high point densities can make the distributor moreprone to fouling because of smaller orifices. However, with the commonlyused random and structured packings,the effect of point density is relativelyminor. The difference between points/ft2[60 to 155 pts/m2] has aslight effect on the packing Height of aTransfer Unit (HTU).