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It is desired to concentrate a NaOH solution from 12.5 % to 40% in a double effect evaporator. 50,000 lb/hr of feed solution enters the evaporator at 120 oF, and steam at 15 psig is available for effecting the concentration. Vacuum in the 2nd effect is held at 24in. Hg, and water from a cooling tower is available at 85 oF. Estimate
(a) quantity of feed and water needs for the forward feed operation,
(b) quantity of feed and condenser water need for the backward feed operation,
(c) Surface need for the operation in (a), suppose U is 400 and 250 Btu/hr(ft2) (oF) for the first and second effect respectively. UD equal to 450 and 350 in two effects correspondingly.
Requisites of refractory material or essential requirements of good refractory: a. It should be able to withstand high temperature. The appropriate refractory is chose
Calculate ?G of Eqs?IX-1 and IX-2 for the case of n-octane and plot against r over the range r=5 to 3ooA and for the two cases of x=2 and x=250.Assume 20? IX-1:?G=-n?µ+4pr2? IX-2:?
ac++ programming which calculate molcular weight of hydrocarbon compounds
whycoagulant is not used in hot lime soda proces
The aim of this assignment is to develop and test your ability to integrate your knowledge of plastic failure and fracture. Below is a plot that shows the plane strain fracture tou
Pour point: Just as flashpoint when temperature is further lowered below cloud point of certain temperature, oil becomes semi-solid and losses its flow characteristics. This point
I want to make a report on this topic please help.
Brazing and Soldering - Both soldering and brazing processes are useful for combination two dissimilar metals. Both brazing alloy and solder have lower melting points than the met
Two parallel planes 1.2x1.2 are splited by a distance of 1.2 m. the emissivity's of the planes are 0.4 and 0.6, and the temperature are 760 and 300 oC, correspondingly. A 1.2x1.2 r
the pilling bedworth ratio of iron is 1.77 why it not stable as per rulr
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