Sedimentation Studies Apparatus Datasheet
2
2 - Y R W A R R A N T Y O N A L L A R M F IE L D P R O D U C T S <EXTENDED> WARRANTY 2 years The Armfield Sedimentation Studies Apparatus provides a facility for studying the basic physical processes involved in sedimentation. DESCRIPTION Sedimentation is a process used widely in the clarification of water and wastewater. Particles settle from suspension in different ways, depending on the concentration of the suspension and the characteristics of the particles. The simplest type of sedimentation is the settling of a dilute suspension of particles which have little or no tendency to flocculate. In these circumstances, the prediction of clarification rates and their scale-up to plant design is relatively straightforward. For higher concentrations where inter-particle effects become significant and where agglomeration may take place, different regimes of settling rate occur, known as ‘zone’ settling (fig 1). Information from batch tests for such systems forms a vital part of the search for the optimum design and operation of industrial sedimentation tanks. The Armfield Sedimentation Studies Apparatus allows demonstration of these different characteristics for any chosen sediment/water system. DEMONSTRATION CAPABILITIES • effect of initial concentration on sedimentation rates • construction of settling rate curves from a single batch test • effect of initial suspension height on sedimentation rates • effect of particle size distribution • use of flocculating additives. ISSUE 7 The latest version of this data sheet is available at: www.armfield.co.uk/w2 SEDIMENTATION STUDIES APPARATUS – W2 W SERIES: WATER TREATMENT WITH DISCOVER Clarified zone Discrete particle settling Hindered settling Transition zone Compression h Fig 1: Settling regimes
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Sedimentation is a process used widely in the clarification of water and wastewater. Particles settle from suspension in different ways, depending on the concentration of the suspension and the characteristics of the particles. The Armfield Sedimentation Studies Apparatus provides a facility for studying the basic physical processes involved in sedimentation.
Transcript of Sedimentation Studies Apparatus Datasheet
2 -YR WARRANTY ON ALL ARMFIELD P
RODU
CTS
<EXTENDED> WARRANTY
2 years
The Armfield Sedimentation Studies Apparatus provides a facility for studying the basic physical processes involved in sedimentation.
Description
Sedimentation is a process used widely in the clarification of water and wastewater. Particles settle from suspension in different ways, depending on the concentration of the suspension and the characteristics of the particles. The simplest type of sedimentation is the settling of a dilute suspension of particles which have little or no tendency to flocculate. In these circumstances, the prediction of clarification rates and their scale-up to plant design is relatively straightforward.
For higher concentrations where inter-particle effects become significant and where agglomeration may take place, different regimes of settling rate occur, known as ‘zone’ settling (fig 1). Information from batch tests for such systems forms a vital part of the search for the optimum design and operation of industrial sedimentation tanks.
The Armfield Sedimentation Studies Apparatus allows demonstration of these different characteristics for any chosen sediment/water system.
DeMonstrAtion cApABiLities • effect of initial concentration on sedimentation rates
• construction of settling rate curves from a single batch test
• effect of initial suspension height on sedimentation rates
• effect of particle size distribution
• use of flocculating additives.
issue 7The latest version of this data sheet is available at:
www.armfield.co.uk/w2
SEDIMENTATION STUDIES APPARATUS – W2W SERIES: WATER TREATMENTWITH DISCOVER
Clarified zone
Discreteparticle settling
Hinderedsettling
Transition zone
Compression
h
Fig 1: Settling regimes
orDerinG speciFicAtion• Five graduated, 1m long x 51mm bore glass
cylinders mounted vertically on a backboard.
• Cylinders are illuminated from behind and removable for cleaning.
• Supply includes stop clock, three 2 litre capacity plastic beakers and a specific gravity bottle.
• Demonstration capabilities:
– effect of initial concentration on sedimentation rates
– construction of settling rate curves from a single batch test
– effect of initial suspension height on sedimentation rates
– effect of particle size distribution
– use of flocculating additives
Description – continueD
Five equal sized glass cylinders are mounted vertically on a backboard incorporating measuring scales. Each of the cylinders may be removed from the board for washing, filling and mixing of the solid particles. Suspensions containing different sediments can be placed in the cylinders and the differences in sedimentation rate observed by measuring the changes in height of the various solid/liquid interfaces with respect to time (e.g. fig 2).
The equipment includes the following accessories necessary for a self-contained facility: stop clock, three plastic beakers of 2 litre capacity, specific gravity bottle. An accurate balance (not supplied) is required for weighing the solids. The whole apparatus is bench-mounted and provided with back lighting.
tecHnicAL DetAiLs
Tube length: 1m Tube internal diameter: 51mm
recoMMenDeD instruMents
(not supplied by Armfield)
Balance for weighing sediments Typical capacity: 300g Typical sensitivity: 0.1g
requireMents
Electrical supply:W2-A: 220-240V/1ph/50Hz W2-B: 120V/1ph/60Hz
oVerALL DiMensions
Height: 1.14m Width: 0.70m Depth: 0.43m
sHippinG speciFicAtion
Volume: 0.8m3 Gross weight: 90kg
Fig 2: Typical sedimentation curves
Sedimentation curves110
90
80
70
60
50
40
30
20
10
020 40 60 80 100 120 140
Time (mins)
Top interface liquid/solid
Sediment layer thickness
Heig
ht o
f int
erfa
ce (c
m)
15%
12.5% 10%
7.5%5%
©2012 Armfield Ltd. All Rights Reserved We reserve the right to amend these specifications without prior notice. E&OE 0112/3k/SO2796Computers are not supplied by Armfield.
Head Office: Armfield Limited Bridge House, West street, Ringwood, Hampshire. BH24 1DY england
Telephone: +44 1425 478781Fax: +44 1425 470916e-mail: [email protected]
U.S. Office: Armfield inc. 436 West Commodore Blvd (#2) Jackson, NJ 08527Telephone: (732) 928 3332Fax: (732) 928 3542e-mail: [email protected]
2 -YR WARRANTY ON ALL ARMFIEL
D PRO
DUCT
S
<EXTENDED> WARRANTY
2 years
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