This document serves as a report should anyone want to duplicate the filtration experiment and compare values from the said report
Ullmann Filtration FundamentalsFull description
CHEE3731 Filtration NotesFull description
CJC oil filtration system
Descripción: Design of bag filters
Filtration notesDeskripsi lengkap
FILTRATION & CENTRIFUGATION MECHANICAL – PHYSI CAL SEPARATION PROCESS
MECHANICAL – PHYSICAL SEPARATION PROCESS FILTRATION
CENTRIFUGATION SETTLING AND SEDIMENTATIPN
MECHANICAL SIZE REDUCTION & SEPARATION
FILTRATION
CENTRIFUGATION
Solid particles are removed from the slurry by forcing the fluid through a filter medium, which blocks the passage of the solid particles and allows the filtrate to pass through.
Similar to ordinary filtration where a bed or cake of solids builds up on a screen, but centrifugal force is used to cause the flow instead of a pressure difference.
Pressure difference is set up and causes the fluid to flow through small holes of the screen or cloth which block the passage of the large solid particles, which, in turn, build up on the cloth as a porous cake.
PROBLEM 1 What is the porosity of a solid if its bulk density is 1125 kg/m3 and its true density is 1500 kg/m3?
POROSITY (Ɛ)
PROBLEM 1 (cont.)
PROBLEM 2 Given the following data on filter cake (CaCO3) from plate and frame filter press: ◦ ◦ ◦ ◦
Thickness of cake: 1 inch Weight of the cake: 2.7 lbs Dimensions of cake: 7 x 8 inch Density if CaCO3: 183 lb/ft3
The porosity of the cake is
PROBLEM 2 (cont.)
FILTRATION
FILTRATION
FILTRATION
FILTRATION
FILTRATION
CONSTANT PRESSURE FILTRATION
CONSTANT PRESSURE FILTRATION
CONSTANT PRESSURE FILTRATION
CONSTANT RATE FILTRATION
CONSTANT RATE FILTRATION
CONSTANT PRESSURE FILTRATION PRECEEDED BY CONSTANT RATE FILTRATION
CONSTANT PRESSURE FILTRATION PRECEEDED BY CONSTANT RATE FILTRATION
PROBLEM 3 Volume of the filtrate collected is 1 gal when the filtration rate is 1.5 gpm, and it is 5 gal when the filtration rate is 0.6 gpm. Calculate the volume collected when the filtration rate is 0.75 gpm. What is the total volume collected in 10 min? Assume constant-pressure filtration.
PROBLEM 3 (cont.)
PROBLEM 3 (cont.)
PROBLEM 3 (cont.)
PROBLEM 4 In the filtration of Al(OH)3 the following data were obtained: ◦ The pump is operated at maximum capacity (P=50psia); ◦ Filtration was completed at constant rate pressure; ◦ Constant rate operation time is 15 min and 1/3 of the total volume is obtained during this period.
Given the above, the total filtration time is
PROBLEM 4 (cont.)
PROBLEM 5 If only ½ of the original filtrate volume of the above problem were to be collected with the area remaining unchanged, the new filtration time is
PROBLEM 5 (cont.)
CENTRIFUGATION
CENTRIFUGATION
PROBLEM 6 The capacity in cubic meters per hour of a clarifying centrifuge operating under these conditions is? ◦ ◦ ◦ ◦ ◦ ◦ ◦ ◦
Diameter of bowl = 600 mm Thickness of liquid layer = 75 mm Depth of bowl = 400 mm Speed = 1200r/min Specific gravity of liquid = 1.2 Specific gravity of solid = 1.6 Viscosity of liquid = 2 cp Cut size of particles = 30 microns
PROBLEM 6 (cont.)
BASKET CENTRIFUGAL FILTER
BASKET CENTRIFUGAL FILTER
BASKET CENTRIFUGAL FILTER
PROBLEM 7 A batch centrifugal filter having a bowl diameter of 750 mm and a bowl height of 450 mm is used to filter a suspension having the following properties: ◦ ◦ ◦ ◦ ◦ ◦ ◦ ◦
Temperature: liquid, water = 25°C Porosity of cake = 0.435 Final thickness of cake = 150 mm Specific cake resistance = 9.5 E 10 ft/lb Filter medium resistance = 2.6 E 10 per ft Speed of the centrifuge = 2000 rpm Concentration of solids in feed = 60 g/L Density of dry solid in cake = 2000 kg/m3
The final cake is washed with water under such conditions that the radius of the inner surface of the liquid is 200 mm. Assuming that the rate of flow of wash water equals the final rate of flow of filtrate, the rate of washing is m3/hr is