0

3

(Filtration)

5

533 29089 23

533 29095 23

533 29312 23

533 29415 23

2306350 Unit Operation Lab I

2555

1

2

2

10

10

11

12

2

3

(Filtration)

1. Slurry Filter press / 2. Filter cake

(Separation) -

-

1. Filtration (cake)

2. Settling and sedimentation

3. Centrifugal settling and sedimentation

3

4. Centrifugal filtration cake driving force

5. Mechanical size reduction and separation

(Filtration)

(slurry) (filter medium) (,)

( , ) (filter cake)

(Filtrate) filtration rate

filter acid diatomaceous earth

Filter 2 Surface filter filter cake

filter coffee filter , industrial bag house , plate and frame drum filters 2 Depth filter filter

filter

Surface filters

() ( )

cake filter medium

1 3

4

fHP

=

laminar Blaze-Kozeny equation Kozeny-Carman equation

.

)1(150

32

2X

D

VH

p

sf =

(permeability,k)

32

2

)1(150

pDk =

.

X

k

VH sf =

X

kP

A

QVs

.

)(==

2 cake filter medium

FMcake

sX

kPP

X

kPPV ==

4321

P2

FM

s

cake

sk

XVP

k

XVPP +==

312

Vs

filter

cakecake

sA

Q

k

X

k

X

PPV =

+

=

31

2 kx /

Cake Resistance Cloth Resistance

5

filter medium ( )FMkx / a filtrate cake filter medium

a

cake

cakearea

X

1cake of mass =

filtrate of volume

solids of massfiltrate of volume

1

areacake=

cake

W

1

filtrate of volume

solids of mass=

WA

VX cake =

V filtrate

Vs

dt

dV

AA

Q

akA

VW

PPVs

1

31

centrifugal pump blower

P1-P3

tPPaA

V

k

W

A

V31

2

-2

6

, k

sPk

1resistance specific Cake ==

cake K C

(t)

7

Depth Filters

Depth Filters

Depth Filters Surface filter

Depth Filters

surface filter

1.Plate and Frame Filter Filter Press

(Pressure Filter)

(Slurry) (Frame)

Batch

(Retentate)

Flow rate Cake

Pressure drop Flow rate

Slurry

8

Plate and Frame

2.Belt Press Filter

Plate and Frame Filter

(Continuous)

Slurry

(Belt)

Cake

Plate and Frame Belt Press

Belt Press Filter

9

3.Sand Drying Bed

Slurry Bed

cake Batch

Sand Drying Bed

4.Adsorption by Activated Carbon

(Adsorption)(Activated Carbon)

Recovery

Packed Bed

Adsorption by Activated Carbon

10

1. Filler Press

2.

3.

4.

5. Cake

6.

7.

8. (CaCO3)

9.

1. (CaCO3) 3%wt/vol.H2O 100

2. plate frame

3. air compressor 1 kg/cm2

4. valve slurry

5. filtrate filtrate 1

filtrate 10

6. cake cake cake

7. cake 80 C 12 cake

8. 1

11

filtrate (l) (min) (min)

1

2

3

4

5

6

7

8

9

10

(g) Cake+ (g) Cake+ (g) Cake (g) Cake (g) 1 2 3 4 5

(g) Cake+ (g) Cake+ (g) Cake (g) Cake (g) 1 2 3 4 5

12

1. Christie J. Geankoplis. Transport Processes and Unit Operations 3rd edition. Prentice-Hall International,Inc: 1993.

2. (Filtration). (6 2555). Available from: http://www.namsaithai.com/index.php?option=com_content&view=article&id=56&catid=34&Itemid=54

3. 2 (Filtration). (6 2555). Available from: http://www.agro.cmu.ac.th/e_books/604303/electronic%20laboratory_pdf/Lab2-filtration.pdf

4. De Nevers N., Fluid Mechanics for Chemical Engineerings 2nd edition , McGraw-Hill International Book Co

Singapore , 1991 , page 426-429

5. http://www.dicalite-europe.com/filtrat.htm

6. http://www.etpcwater.com/products/Filter_Press

7. http://www.foodnetworksolution.com/wiki/word/0791/belt-press

8. http://www.sgconsulting.co.za/flottweg-belt-presses.php

9. http://nptel.iitm.ac.in/courses/Webcourse-contents/IIT-KANPUR/wasteWater/Lecture%2036.htm

10. http://iati-test.akvo.org/wiki/index.php/Planted_Drying_Beds

11. http://www.frtr.gov/matrix2/section1/list-of-fig.html