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Category > Business & Finance Posted 28 Jul 2017 My Price 5.00

A direct-heat, countercurrent-flow, rotary dryer with a 6-ft diameter and 60-ft length is available

A direct-heat, countercurrent-flow, rotary dryer with a 6-ft diameter and 60-ft length is available to dry titanium dioxide particles at 70°F and 1 atm with a moisture content of 30% (dry basis) to a moisture content of 2% (dry basis). Hot air is available at 400°F with a humidity of 0.015 lb/lb dry air. Experiments show that an air-mass velocity of 500 lb/h-ft2 will not cause serious dusting. The specific heat of solid titanium dioxide is 0.165 Btu/lb-oF, and its true density is 240 lb/ft3. Determine:
(a) A reasonable production rate in lb/h of dry titanium dioxide (dry basis).
(b) The heat-transfer rate in Btu/h.
(c) A reasonable air rate in lb/h (dry basis).
(d) Reasonable values for the exit air and exit solids temperatures.

Answers

Alpha Geek
(8)
Status NEW Posted 28 Jul 2017 09:07 AM My Price 5.00

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Attachments

1501234565-1588179_1_636363125115769710_New-Doc-2017-07-22--9--1 1.jpg
file 1501234583-Answer.docx preview (287 words )
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file 1501234668-Answer.docx preview (287 words )
A-----------nsw-----------er ----------- di-----------rec-----------t h-----------eat----------- co-----------unt-----------er -----------cur-----------ren-----------t f-----------low----------- ro-----------tar-----------y d-----------rye-----------r ------------ di-----------ame-----------ter----------- =6-----------95 -----------d =----------- 6 -----------ft -----------, L----------- = -----------60 -----------ft -----------vol-----------ume----------- of----------- th-----------e r-----------ota-----------ry -----------dry-----------er -----------= V----------- = -----------22/-----------7 *----------- ( -----------6 /-----------2 )----------- ^2----------- * -----------L =----------- 0.-----------785----------- * -----------6^2----------- * -----------60 -----------=16-----------95.-----------6 f-----------t3 -----------sur-----------fac-----------e a-----------rea----------- 0f----------- cr-----------oss----------- se-----------cti-----------on -----------= A----------- = -----------22/-----------7 *----------- d -----------*L -----------= 3-----------.14----------- * -----------6 *-----------60 -----------= 1-----------130-----------.4 -----------ft2----------- or----------- , -----------A =----------- 0.-----------785----------- * -----------d^2----------- = -----------0.7-----------85 -----------* 6----------- ^2----------- =2-----------8.2-----------6 f-----------t2 -----------whe-----------n a-----------ir -----------is -----------flo-----------win-----------g p-----------ara-----------lle-----------l w-----------ith----------- th-----------e s-----------urf-----------ace----------- of----------- th-----------e s-----------oli-----------d t-----------ita-----------niu-----------m d-----------iox-----------ide----------- pa-----------rti-----------cle-----------s ,----------- th-----------e h-----------eat----------- tr-----------ans-----------fer----------- co-----------eff-----------ici-----------ent----------- = -----------hy -----------is -----------est-----------ima-----------ted-----------
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