GAS ABSORPTION PRINCIPLES
ABSORPTION COLUMN MODELSTRAY-TYPE PLATE COLUMNSCOUNTERCURRENT
CONTACTING OF GAS AND LIQUID CONTACTING OCCURS IN LIQUID ON
TRAYS
LIQUID FLOW
PERFORATED TRAY OVERFLOW WEIR
LIQUID FLOWS PARALLEL TO THE TRAY GAS FLOWS PERPENDICULAR TO THE
TRAY
GENERAL CONFIGURATION
TRAY DESIGNSSIEVE TRAY BUBBLE CAPS VALVE TRAYS
http://www.kochglitsch.com/koch/products/flexitray_trays.asp
http://www.jaeger.com/internalsHDbubblecaptrays.htm
http://www.rauschertus.com/process_technologi
es/bubblecaptrays.html
PACKED COLUMN DESIGNSCOUNTERCURRENT GAS AND LIQUID CONTACTING
LIQUID/GAS INTERFACE ON PACKING LIQUID FLOWS OVER THE SURFACE OF
THE PACKING WITH A GENERAL DOWNWARD DIRECTION GAS FLOWS THROUGH
INTERSTICES IN THE PACKING WITH A GENERAL UPWARD DIRECTION PACKING
TYPESRANDOM STRUCTURED
http://dtirp.dtra.mil/products/CWC/132p-12.jp
RANDOM PACKINGINSTALLED IN SECTIONS DISTRIBUTION PLATE IS
BETWEEN SECTIONS RELATIVE FLOWS DETERMINE HYDRDYNAMICS LIMITING
CASESFLOODING WEEPINGLIQUID IN
DI RI U ION LATE
G
OU
CK D C ION
RANDOM PACKING DESIGNSSHAPESRINGS SADDLES OTHERS
MATERIALSMETAL CERAMIC
PLASTIChttp://www.koch-glitsch.com/koch/products/plastic_random_packing.as
RANDOM PACKING DESIGNATIONSNOMINAL DIAMETERS VOID FRACTION
http://www.wisconsinstamping.com/images/raschig.jpg BULK
WEIGHThttps://fscimage.fishersci.com/ecat/F_N
umbers/F70000_F79999/F73000_F73999/
F73800_F73899/F738-01~wn.jpg
http://www.koch-glitsch.com/koch/products/flexiring.asp
STRUCTURED PACKINGPACKING IS MADE IN SECTIONS AND FILLS ENTIRE
COLUMN DIAMETER
http://www.sulzerchemtech.com/DesktopDefault.aspx/tabid-232/
DESIGNS FOR TRAY COLUMNSSET UP McCABE THIELE DIAGRAM WITH
OPERATING LINE AND EQUILIBRIUM LINE
DILUTE SYSTEMSWHEN OPERATING AND EQUILIBRIUM LINES HAVE CONSTANT
SLOPES KREMSER EQUATIONS APPLY y1 mx2 ln y mx (1 1 A) 1 A 2 2 N! ln
A x2 y1 m ln x y m (1 A) A 1 1 N! ln(1 A)(10.6 7)
(10.6 8)
NON-LINEAR SYSTEMSOPERATING LINE BASED ON INERT FLOWS EQUATION
(10.6-4) x2 y1 x1 NORMALLY TIED TO ONE SET OF TERMINAL CONDITIONS
GRAPHICAL FORM OF SOLUTION (McCABETHIELE DIAGRAM) PLOTS BOTH
LINES
y2 L' 1 x V ' 1 y ! L' 1 x V ' 1 y 2 1 2 1
NUMBER OF EQUILIBRIUM STAGESBASED ON INTEGER STEPS BETWEEN
OPERATING LINE AND EQUILIBRIUM LINE.ABSORPTION, OPERATING LINE LIES
ABOVE THE EQULIBRIUM LINE STRIPPING, OPERATING LINE LIES BELOW THE
EQUILIBRIUM LINE
LIMITING CASES(L/V)minOPERATING LINE WITH TERMINATION ON
EQUILIBRIUM LINE REQUIRES INFINITE STAGES (L/V)min MAY OCCUR AT
FIRST INTERSECTION OF STRAIGHT LINE FROM TERMINAL POINT WITH
EQUILIBRIUM LINE
(L/V)des = (L/V)min(MULTIPLE)DESIGN TERMINAL POINT IS BASED ON
MASS BALANCE FINITE NUMBER OF EQUILIBRIUM STAGES FOR LESS THAN
EQUILIBRIUM STAGES, USE MUPHREE yn yn 1 EFFICIENCY (11.5-2) LM ! y
*n yn 1
PACKING PRESSURE DROPCONTACTING EFFICIENCY IN ABSORBERSURFACE
AREA/UNIT VOLUME HYDRODYNAMICS
SURFACE AREATABLE 10.6-1 FOR A RANGE OF PACKING TABLE 14.7b IN
PERRYS
LIMITING CONDITIONSLOW FLUXES CHANNELING OR WEEPING HIGH FLUXES
FLOODING
PRESSURE DROP CORRELATIONSEMPIRICAL DATAPERRYS FIG. 14-48 THRU
14-59 FIG. 10-6-5 &10.6-6
BASIS IS DRY FLOW FLOODING LIMITFP TABLE 10.6-1 in.w.c. !
0.115FP0.7 (10.6 1) (Pflood ft Packing
http://www.cheresources.com/acidpacktowerfig3print.sh
DESIGN FLUXESDIAMETER OF COLUMN IS BASED ON FLUX
CALCULATIONNORMALLY CONTROLLED BY VAPOR FLUX
RECOMMENDED DESIGN VALUES RANGE FROM 65% - 80% OF FLOODING
EXPERIMENTAL DATABEST METHOD EDGE EFFECTS FOR SMALL TEST
COLUMNS
MIST ELIMINATORINCLUDED IN MOST DESIGNS RECOVERS ENTRAINED
DROPLETS ABOVE PACKING
MIST ELIMINATORSTYPES INCLUDEVANE CYCLONIC MESH
ELECTROSTATIC
http://www.acsseparations.com/mmstr.htm
http://www.bionomicind.com/images/series9000.jpg
http://www.amistco.com/PRODUCTS/ELIMINATORS/
ation/mist_eliminators/vanemisteliminator msh_vne.html
http://img.alibaba.com/photo/266357355/Electrostatic_Oil_Mist_Eliminator_for_Kitchen_Exhaust_Ventil
http://www.knitmesh.com/business/separ s.html
MIST ELIMINATOR RANGESTYPE DEPENDS ON PARTICLE DIAMETER
http://www.knitmesh.com/ business/separation/mist_
eliminators/separationmec hanisms.html
CYLCONIC MIST ELIMINATORSDESIGN BASESPERRYS 7th, P. 26-36
SECTION 14.4F
http://www.koch-ottoyork.com/downloads/ProductCatalog.pdf
http://www.epa.gov/eogapti1/ module6/matter/control/contr
ol.htm#esptypes
ELECTROSTATIC PRECIPITATORSESP CAN REMOVE AEROSOLS OR
PARTICULATE FROM A GAS STREAM
http://www.epa.gov/eogapti1/module
6/matter/control/control.htm#precipit
CAN REMOVE SUBMICRON PARTICLES
