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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.
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What are the objectives of heat treatment of metals? Objectives of heat treatment- Cause relief of internal stresses developed while cold working, welding, casting, forgi
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Hall effect can be used to measure (A) Mobility of semiconductors. (B) Conductivity of semiconductors. (C) Resistivity of semiconductors.
Describe different type of valves
hi, i am designing an (absorption column), i need help. either by a tutor to take me through the design, or by actually doing the design. please let me know if you help thanks
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The property of a material by which it can be drawn into wires is called as Ductility is the only property of a material by which it can be drawn into wires.
The various types of polarization processes are: a) Electronic polarization b) Ionic Polarization c) Orientation Polarization, and d) Space charge Polarization
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