The goals of physical therapy are to decrease back pain, increase function, and teach the patient a maintenance program to prevent future back problems.Ĭommon forms of physical therapy include:ġ.Passive physical therapy (modalities), which includes things done to the patient, such as heat application, ice packs and electrical stimulation. T ~ 87 88º C Note: hexane probably better choice as reference. K ref TNew If pick C4 as reference: First guessĤ.0145 T too low K i 3.1 1.0. 3 7 Can also draw line of slope through equil point. V 2.985 and V F Can also calculate V/F from slope.Ġ.545 0.6215. T ~ 82.8 C linear interpretation on Table 2-7. line of slope This gives L V 2 1 V F 2 3 7. Starting with x 2, find y2 = 0.62 from equilibrium. Can calculate V/F from mass balance, Fz Lx Vy. This problem is now very similar to 3-D1c. L ranges from 3 D 6 ft to 5 D=10 ft Note that this design is conservative if a demister is used. 42 18.01 Find Temperature of the Drum T: From Table 3-3 find T corresponding to y. K i,L1 L 2 z i L K i,L1 L 2 1 1 K i,V F K i,L1 L 2 1 z i (2-60b) and 2-60c)ĭividing numerator and denominator by F and collecting terms. Thus a complete new calculation needs to be done. Note this will change the equilibrium data and raise temperature. c2) ρv can be increased by increasing pressure. Perhaps small improvements can be made with a better demister → Talk to the manufacturers. Add a second drum which can handle remaining 8340 lbmol/h. 98 Fexisting 16,660 lbmol/h Alternatives a) Do drums in parallel. 2 2 Fexisting D exist 4 2 Feed rate drum can handle: F α D. hr Since D α V and for constant V/F, V α F, we have D α With F = 25,000:įnew Fold = 5, Dnew = 5 Dold = 4.90, and Lnew = 3 Dnew = 14.7. This is essentially the same problem (disguised) as problem 2-D1c and e but with an existing (larger) drum and a higher flow rate.
Examples: F, z, Tdrum, Pdrum F, h F, z, p F, TF, z, p Must be sure you don’t violate Gibbs phase rule for intensive variables in equilibrium. The liquid is superheated when the pressure drops, and the energy comes from the amount of superheat. K decreases as molecular weight increasesĢ.A16. K stays same as mole fraction changes (T, p constant) -Assumption is no concentration effect in DePriester charts d. Decrease the drum diameter and decrease the relative volatilities. In a flash drum separating a multicomponent mixture, raising the pressure will: i. Feed location cannot be found from T F and z on the graph because equilibrium data is at a lower pressure on the graph used for this calculation. In the flash mixture enthalpy is unchanged but temperature changes. Its bubble point and is a two-phase mixture (It “flashes”). When pressure is dropped the mixture is above
At this pressure its enthalpy can be calculated as a liquid.
2.A1.įeed to flash drum is a liquid at high pressure. Weight fraction ethanol = 18.4/29.2 = 0.630 Flow rate = (1500 kmol/hr) = 43,800 kg/hr.Ĭhapter 2 New Problems and new solutions are listed as new immediately after the solution number. You probably used some of the following: chromatography, crystallization, distillation, extraction, filtration and ultrafiltration. For example: the lungs are a gas permeation system, the intestines and kidney are liquid permeation or dialysis systems. Many homes have a water softener (ion exchange), or a filter, or a carbon water “filter” (actually adsorption), or a reverse osmosis system. Even the water in bottles has been purified (either by reverse osmosis or by distillation). Answer is d.Įverything except some food products has undergone some separation operations. These new problems in chapter 1 are: 1A3, 1A4, 1B2-1B4, 1D1.
#Depriester chart clear manual
SPE 3rd Edition Solution Manual Chapter 1 New Problems and new solutions are listed as new immediately after the solution number. Includes Mass Transfer Analysis 3rd Edition (Formerly published as Equilibrium-Staged Separations) by Phillip C.
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