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mechanism where very small micron size microbubbles are

formed and uniformly distributed. This ensures that gas is

entrained into the entire feed stream. The bubbles then

attach to the oil and solids particles present. This stream

passes through a baffle section within the separator vessel

central riser at a reduced velocity. This allows the gas and

oil/solids particles to flocculate together prior to being

released at the surface of the vessel.

The oil/solids floc is radially dispersed towards the outer

rim of the vessel. The oil is periodically skimmed from the

vessel into the skim trough by raising the operating level

to a point just above the skim trough. As the liquid level

rises, it spills over into the oil trough. When the skim cycle

is complete, the level set point is reset and the unit returns

to normal operation automatically. The main advantage

to this intermittent skimming system is the oil skim rate

is reduced to approximately 1%of the average daily flow

versus 5to 10%if a continuous skim is used. This means

a lot less water has to be reprocessed. This is particularly

important in floating applications where this rate can be

even higher due to the motion inside the vessel caused by

FPSO/SPARmovement. With the intermittent skim control,

the rate is constant.

Data Sheet | TC9814-00

UNICELVertical IGF

Proven Efficient Induced Gas Flotation Systems

A high-efficiency, vertical hydraulic flotation machine for removing oi l and suspended solids from produced and waste waters.

OverviewThe UNICELVertical IGF(Induced Gas Flotation) System is

a leading technology for environmentally safe treatment

of secondary produced waters. The UNICELsystem is a

simple, hydraulically operated gas flotation machine that

delivers efficient oil/water separation with complete process

containment. Effective oil recovery and water treatment

are achieved simply and economically, with operator and

environmental safety ensured by the completely enclosed

flotation process. Units are a vertical design which is well-

suited for locations where space restrictions require asmall footprint and are unaffected in floating production

systems.

Operating Principle and Key Features

The UNICELVertical Induced Gas Flotation(IGF)unit

is designed for maximum efficiency and simplicity for

reliable, low maintenance operation and is ideally suited

for floating production applications. The UNICELprocess

involves introducing gas into the wastewater inlet stream

via an eductor, coalescing the oil/solids, releasing the water

in a separation vessel, skimming the floated oil and solids

from the surface of the vessel and then discharging clarified

effluent from the bottom of the vessel. The UNICELVertical

IGFcombines all of these actions in a unique vertical design

which incorporates the principles of stokes law by using

finely dispersed gas microbubbles to reduce the apparent

density of the oil and solids, increase their droplet size and

greatly increase buoyancy through coalescence. The vertical

annular riser eliminates the potential for short circuit flow

found in some horizontal designs, and combines column

flotation technology with its downflow design, which

promotes flotation of oil at the surface.

The UNICELprocess begins by providing pressurized

water to a venturi-type eductor. Pressurized water passing

through the eductor creates a vacuum at the air/gas

suction port, whereby the air/gas stream is induced into the

water stream. The mixture is combined with the incoming

wastewater stream and then passes through a dispersing

PROCESS SYSTEMS

W A T E R

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Performance

High-Efficiency Oil Removal - The separation

efficiency of the unique UNICELflotation cell

design compares favorably to the industry

standard Depurator. At many installations, the

UNICELachieves effluent oil concentration in therange of 5to 10parts per million. Our UNICEL

cells are designed to provide 95%or greater oil

removal and 80%or greater removal of non-oil

solids at full design capacity.

Product Range Individual units for flow rates of 1000 BPD

to over 160,000 BPD(160m3/day to 25,400

m3/day)

Separation efficiency up to 98%

Benefits and Advantages Compact, lightweight, vertical installation

Minimal footprint

No internal moving parts, low maintenance

Minimal power requirements, minimal controls

Motion insensitive vertical UNICELdesign is

ideal for floating production systems

Utilizes process or inherent feed pressure

No environmental pollution

Gas tight design

Low skim rates

All hazardous or toxic gasses are contained

Can be constructed to ASMEcode for

pressurized operation

No specialty pumps required

Options Gravity Discharge

Pressure Discharge

Recirculation

Gas Sparging

ApplicationsThe UNICELVertical IGFcan be used wherever

secondary treatment of oil-contaminated water

or waste water is required.

Oilfield produced waters

Refinery waste waters

Petrochemical waste waters

Food industry/pulp and paper

PROCESS SYSTEMS

2010 Cameron | UNICEL is a registered trademarks of Cameron. | Printed in USA | 07/10 TC9814-005

LOCATIONS

United States of America

11210 Equity Dr., Suite 100

Houston, TX 77041 USA

TEL +713.849.7500

United Kingdom

Cameron House

61-73 Staines Road West

Sunbury-on-Thames

Middlesex, UK TW16 7AH

TEL +44.1932.732000

Singapore

2 Gul Circle (Gate 2)

Jurong, Singapore 629560

TEL +65.6861.3355

OTHER LOCATIONS

Abu Dhabi

Australia

Brazil

Calgary

Colombia

France

Japan

Mexico

Saudi Arabia

Russia

www.c-a-m.com