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Nguyn Ngc Tr Hunh23/04/2015

QU TRNH & THIT B SILICATE 1

Bi tp

Mt hn hp quartz c cho qua sang c ng knh l l0,152cm. Phn tch tch ly phn on trn sang v phnon di sang c cho bng sau. Tnh t l khi lnggia phn on trn sang v phn on di sang vi nhpliu v hiu sut tng qut ca sang.

Bi tp 1

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Bi tp 3

Gii

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Gii

xF = 0,540 xD = 0,895 xB = 0,275

Ta c:

Gii

Hiu sut tng qut:

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Hn hp vt liu c sng qua 2 ry xp song song ry 8(Dh=0,2362cm) v 14 (Dh=0,1168cm).

Phn on TH trn sng 8

Phn on TRUNG di sng 8, trn sng 14

Phn on NH di sng 14

Xc nh

TH/Nguyn liu; TRUNG/Nguyn liu; NH/Nguyn liu

Hiu sut sng

Bi tp 2

Bi tp 4

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Gii

N08

N014

TH

TRUNG

NHO

Gii

Kt qu phn ch ry

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Gii

Gii

Cn bng vt cht

Trong NLiu %TH xnliu= 46 %TRUNG ynliu= 39,5 %NH znliu= 13,5

Trong TH %TH xth= 88 %TRUNG yth= 12 %NH zth= 0

Trong TRUNG %TH xtrung= 40 %TRUNG ytrung= 49,1 %NH ztrung= 10,9

Trong NH %TH xnh= 0 %TRUNG ynh= 46,7 %NH znh= 53,3

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Gii

Nliu = TH + TRUNG + NH

xnliu*Nliu = xth* TH + xtrung* TRUNG + xnh* NH

ynliu*Nliu = yth*TH + ytrung*TRUNG + ynh*NH

TH/Nguyn liu = 24,912%

TRUNG/Nguyn liu = 60,193%

NH/Nguyn liu = 14,895%

Gii

Hiu sut sng vl TH

TH*xth / Nliu*xnliu = 24,912% * 88/46 = 47,65%

Hiu sut sng vl TRUNG

60,193% * 49,1/39,5 = 74,82%

Hiu sut sng vl NH

14,895% * 53,3/13,5 = 58,07%

Hiu sut qu trnh sng

TH * TRUNG * NH = 20,70%

Hiu sut sng (%)

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Thit b b lng h huyn ph gm pha lin tc lnc v pha phn tn l bt cao lanh c khi lngring r=2600kg/m

3. Bit tc lng ca cc htcao lanh trong nc l w0=0,5.10

-3m/s. Xc nh bmt lng cn thit ca thit b, vi nng sut l80tn/h, nc c khi lng ring =1000kg/m3 v nht =1,14.10-3Pas, v nng pha rn l 8%.

Bi tp 3

Gii

Khi lng ring ca huyn ph:

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Gii

Lu lng dng vo thit b lng:

Din tch b mt lng cn thit ca thit b:

Mt cyclone lng bi c ng knh D2=0,6m. Nhit dng bi vo cyclone l 100oC, vi cc ht bi c kchthc nh nht l d=80m. Nng sut lng bi ca thitb Q=2000kg/h. Tc dng chy trong cyclone lvt=12,5m/s v h s tr lc l =105, chiu cao v tr lH1=1m. ng knh ngoi ca ng tm l D1=0,4m. Tnh s vng quay ca dng kh trong cyclone v

tn tht p sut ca cyclone. Cho nht tuyt i ca dng bi = 2x10-5

Bi tp 4

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Gii

Khi lng ring ca bi (khng kh ln vt cht rn) 100oC l:

Lu lng ca dng chy:

Gii

Bn knh trung bnh ca vng quay:

Yu t phn ly:

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Gii

Tc gc vng quay:

Din tch b mt lng bi:

Gii

Tc lng bi:

Thi gian lng:

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Gii

S vng quay ca dng kh:

Vn tc quy c:

Gii

Tn tht p sut (tr lc) ca cyclone:

Chun s Reynold:

Suy ra, cyclone lm vic theo ch lng dng.