Filtration, Size Red, Centri

Question 1

Filtration

Answer 1

Separate solid particles from a slurry by passing the slurry through a semi-permeable membrane.

Question 2

Factors affecting Filtration

Answer 2

1. Pressure drop
2. Area of filtering surface
3. Viscosity of filtrate
4. Resistance of filter cake
5. Resistance of the filter medium

Question 3

Explain Plate and Frame Filter

Answer 3

*Alternating plate and frame
*Positive pressure applied by pump forces fluid flow
*Solids remain in cloth

Question 4

Explain Leaf Filter

Answer 4

*Vacuum sucks the liquid content out of solid
*Solid remain in “leaf”

Question 5

Flotation

Answer 5

Solids separate by floating to the surface of a fluid.
*Air used as flotation agent

Question 6

Size Redution

Answer 6

subdividing solids by application of force to fracture or shatter large masses.

Question 7

Bond’s Law

Answer 7

n = -3/2
E = k * sqrt(1/x)

Question 8

Kick’s Law

Answer 8

n = -1
E = k * ln(x)

Question 9

Rittinger’s Law

Answer 9

n = -2
E = K * (1/x)

Question 10

Filters:
1. Batch
2. Leaf

Answer 10

1. Plate-and-Frame Filter Press
   *Simple and versatile operation
   *High pressure and viscosity
2. Leaf Filter
   Pressure vessel with one or more filter elements
   *Large volume of slurry
   *More efficient

Question 11

Sedimentation

Answer 11

Separation of solid and liquid due to density differences

Question 12

Drag coefficient for hindered settling is ____ for that of free settling

Answer 12

Higher