raschig super-ring

RASCHIG SUPER-RINGProven in Practice and FRI testedThe world-renowned and recognized FractionationResearch, Inc. (FRI) in the USA is an association of thebest-known companies in the field of petrochemistry, thechemical industry, plant and apparatus engineering andmanufacturers of equipment parts. FRI currently operatesthe world’s largest test facility for testing mass transfertrays and packings for rectification processes in thevacuum, normal-pressure and high-pressure range.

RASCHIG SUPER-RINGProven in Practice and FRI testedThe revolutionary idea behind the design of the RaschigSuper-Ring has now also led to exceptionally good masstransfer efficiencies, pressure drops and loadingcapacities in the FRI test facility. The structure of theRaschig Super-Ring is the first to pursue the objective ofproducing turbulent film-type flows and to preventformation of drops. The large number of alternating waveswings also achieves large turbulences in the gas andliquid flows while at the same time it has an extremelyopen geometry.Owing to the fluidically optimized shape of the RaschigSuper-Ring, the randomly dumped packed bedautomatically obtains a structure otherwise found only inthe case of structured packings.1

RASCHIG SUPER-RINGProven in Practice and FRI testedFig. 1 provides information on the measured mass transfer efficiencies of theRaschig Super-Ring for the cyclohexane/n-heptane system at 1.65 bar and forisobutane/n-butane at 6.8 bar and 11.4 bar. The mass transfer efficiency of theRaschig Super-Ring is therefore not only better than the previous modern packingsbut also more favorable than that of structured packings with a comparable surfacearea. (Further information on request). Due to the malfunction of the distributor themass transfer efficiency drops already previously which is mentioned in the figureas "unstable test conditions".HETP, inchesHETP, inchesRaschig-Super Ring No. 2 EfficiencyC6/C7 System, 24 psia (1.65 bar), F.R.I. High Pressure Column, 12 ft (3.66 m) BedF.R.I. Tubed Drip Pan 6.5 mm TubesGas Capacity Factor Fv [m/s (kg/m³) 0.5 ]0,00 0,50 1,00 1,50 2,00 2,50 3,00100,090,0Distributor overflow2,502,2580,02,0070,0Heavy condensation outsidedistributor pan1,7560,01,5050,01,2540,01,0030,0Unstable testconditions0,7520,00,5010,00,250,00,000,00 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40Super Ring, Dist.-DCCapacity Factor Cs, ft/sSuper Ring, Dist.-Below bedRaschig-Super Ring No. 2 EfficiencyiC4/nC4 System 165 psia (11.4 bar), F.R.I. High Pressure Column, 12 ft (3.66 m) BedF.R.I. Tubed Drip Pan 10 mm TubesCapacity Factor Fv [m/s (kg/m³) 0.5 ]0,00 0,25 0,50 0,75 1,00 1,25 1,50 1,75110,0100,02,752,5090,02,25Heavy condensation outside80,0distributor pan2,0070,01,7560,01,5050,01,2540,0Poor Liquid Distributor Performance1,0030,00,7520,0Unstable test0,50conditions10,00,250,00,000,00 0,05 0,10 0,15 0,20 0,25 0,30Capacity Factor C s, ft/sSuper Ring, Dist.-Below bedSuper Ring, Dist.-DCHETP, mHETP, mHETP, inchesRaschig-Super Ring No. 2 EfficiencyiC4/nC4 System 100 psia (6.89 bar), F.R.I. High Pressure Column, 12 ft (3.66 m) BedF.R.I. Tubed Drip Pan 10 mm TubesCapacity Factor Fv [m/s (kg/m³) 0.5 ]0,00 0,25 0,50 0,75 1,00 1,25 1,50 1,75 2,00 2,25100,090,02,502,2580,02,0070,0Heavy fog creation outside distributor pan1,7560,01,5050,01,25Poor Liquid Distributor Performance40,01,0030,00,7520,0Unstable test 0,5010,0conditions0,250,00,000,00 0,05 0,10 0,15 0,20 0,25 0,30 0,35Capacity Factor C s, ft/sSuper Ring, Dist.-Below bedSuper Ring, Dist.-DCHETP, m2

RASCHIG SUPER-RINGProven in Practice and FRI testedFig. 3 shows the pressure drop per theoretical stage. Here the advantageof using our Raschig Super-Ring in mass transfer columns becomesespecially clear. Despite an extremely low pressure drop, the largeturbulence of the gas and liquid flow together with the especially goodsurface wetting causes an excellent mass transfer rate. The pressure dropper theoretical stage of the Raschig Super-Ring is therefore far below thatof Pall rings and other modern packings.Pressure Drop/stage, inch H2ORaschig Super-Ring No. 2 Pressure Drop per StageC6/C7 System, 24 psia (1.65 bar), F.R.I. High Pressure Column, 12 ft (3.66 m) BedF.R.I. Tubed Drip Pan 6.5 mm TubesGas Capacity Factor Fv [m/s (kg/m³) 0.5 ]0,00 0,50 1,00 1,50 2,00 2,50 3,00100,0010,001,000,101 inch H2O = 2.4890,010,00 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40Capacity Factor Cs, ft/sSuper RingUnstable testconditionsRaschig Super-Ring No. 2 Pressure Drop per StageiC4/nC4 165 psia (11.4 bar), F.R.I. High Pressure Column, 12 ft (3.66 m) BedF.R.I. Tubed Drip Pan 10 mm TubesGas Capacity Factor Fv [m/s (kg/m³) 0.5 ]0,00 0,25 0,50 0,75 1,00 1,25 1,50 1,7510,001 inch H2O = 2.489 mbarPressure Drop/stage, inch H2OPressure Drop/stage, inch H2O1,000,10Poor Liquid Distributor PerformanceLimit of pressure measurement device0,010,00 0,05 0,10 0,15 0,20 0,25 0,30Capacity Factor Cs, ft/sSuper RingUnstable testconditionsRaschig Super-Ring No. 2 Pressure Drop per StageiC4/nC4 100 psia (6.89 bar), F.R.I. High Pressure Column, 12 ft (3.66 m) BedF.R.I. Tubed Drip Pan 10 mm TubesGas Capacity Factor F v [m/s (kg/m³) 0.5 ]0,00 0,25 0,50 0,75 1,00 1,25 1,50 1,75 2,00 2,2510,001 inch H2O = 2.489 mbar1,000,10Poor Liquid Distributor PerformanceUnstable testconditions0,010,00 0,05 0,10 0,15 0,20 0,25 0,30 0,35Capacity Factor C s, ft/sSuper-Ring4

RASCHIG SUPER-RINGProven in Practice and FRI testedTab. 1 gives a brief summary of the previous applications of our RaschigSuper-Ring. The exceptionally good chemical engineering data wereconfirmed both in rectification and in absorption and desorption columns.Numerous mass transfer processes are operated with extreme dumpingheights (up to 11 m) without liquid redistributors. These dumping heightscan be achieved since the liquid and gas phases are distributed extremelyevenly over the column cross section due to the optimal packinggeometry, thus preventing mass transfer losses along the mass transfercolumn.Tab.1:Extraction of applications for RASCHIG SUPER-RINGNatural gas plantMethionine plantCaprolactam plantRefineryFatty acid plantEffluent gas plantAmmonia plantEthanol plantFormaldehyde plantMethanol plantButadiene plantN-Methylpyrrolidone plantSynthesis gas plantEffluent water treatmentEthylene plantHydrogen sulfide plantPhenol plantTDI plant5

RASCHIG SUPER-RINGProven in Practice and FRI testedLiquid distributor test-facilityIn order to ensure the quality of our liquid distributors weused our liquid distributor test-facility. At the customer’srequest we can test distributors up to a diameter of 12 m.Mechanical data of various Raschig Super-Ring'sNameMaterialSurfaceaream 2 /m 3freeVol.%NominaldiametermmRaschig Super-Ring Nr. 0.3metal3159615Raschig Super-Ring Nr. 0.5metal2509720Raschig Super-Ring Nr. 0.6metal2159822Raschig Super-Ring Nr. 0.7metal1809825Raschig Super-Ring Nr. 1metal1509830Raschig Super-Ring Nr. 1.5metal1209838Raschig Super-Ring Nr. 2metal1009850Raschig Super-Ring Nr. 3metal809870Raschig Super-Ring Nr. 0.6plastic2069322Raschig Super-Ring Nr. 2plastic10096506

RASCHIG SUPER-RINGProven in Practice and FRI testedSUMMARY OF FRI TEST RESULTS SUBSTANTIAL HIGHER CAPACITY THAN WITH PALL-RINGS OR OTHER HIGH CAPACITY RANDOMPACKINGS SUBSTANTIAL LOWER PRESSURE DROP THANWITH PALL-RINGS OR OTHER MODERN RANDOMPACKINGS ESSENTIAL BETTER MASS TRANSFER EFFICIENCYTHAN WITH EQUIVALENT STRUCTURED PACKINGSRASCHIG GMBHProf. Dr.-Ing. Michael SchultesMundenheimerstr. 100D-67061 Ludwigshafenphone.: +49 (0)621 56 18 - 648fax: +49 (0)621 56 18 - 627e-maill: MSchultes@raschig.dewww.raschig.comJaeger Products Inc.Mr. John P. Halbirt1611 PeachleafUSA-Houston, Texas 77039phone: +1 281 449 9500fax: +1 281 449 9400email: jhalbirt@jaeger.comwww.jaeger.com7