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Sewage Transport and Treatment
One of our biggest areas of
operation, we have supplied systems to most of the major
water authorities in Australia plus
a number of regional authorities. These include chemical
wet scrubbing systems and activated carbon adsorption systems.
The chemical scrubbing systems have been both conventional
caustic/hypochlorite systems and OdorgardTM scrubbing
systems, applied to inlet works, sludge processing, lime
stabilization and other applications within the sewage
treatment plant. Chemical wet scrubbing is still the most
cost effective, predictable, reliable technology for most
STP applications. EGL has supplied virtually all of the
major scrubbing systems for these applications in Australia
over the last fifteen years. Activated carbon systems lend
themselves to sewage pump station and similar applications
in remote areas as well as some STP applications, and we
have supplied many of these as well. Biological
scrubbing and biofilter systems are now available
to complement the above technologies, providing the capability
to reduce
operating costs whilst maintaining performance when used
in conjunction with one of the above technologies.
Mining Over
400 systems based on Wheelabrator technology
have been supplied to the Australian mining and related industries.
These consist of a mix of AeromixTM wet scrubbers, fabric filters,
cyclones and other technology types. Car dumping, crushing,
screening, conveying and conveyor transfer points have all
been handled using these products.
Applications
in this sector vary enormously in size and type of application.
The gas streams are often
particulate
laden
as well as acid gas laden, the scrubbing solution may be
a high strength slurry, high temperatures may be involved
and the operating environments can be extreme. EGL’s
broad range of technologies and depth of experience mean
we can offer a quality solution to just about every application.
This might mean a DynaWave® scrubbing
system or a system
using more conventional scrubbers. EGL has built systems
handling up to 827,000 Am3/hr gas flows, systems
to capture gases as diverse as sulphur dioxide, titanium
tetrachloride and hydrogen cyanide, systems for gold refineries,
lead/zinc smelters, steel smelters, titanium dioxide refineries,
nickel refineries, synthetic rutile plants, copper refineries
etc etc. These include Australia’s only genuine, full
scale flue gas desulphurization (FGD) plant.
Chemical
The chemical process industries cover an enormous
range of applications that we have dealt with. These range
from small
tank vent scrubbers (e.g. hydrochloric
acid storage tanks) to complex systems venting from a range of reactors and other
process equipment. Acrylates from acrylic emulsion manufacture, particulates
from pharmaceutical manufacture, amines and other gases from pesticide and herbicide
manufacture, oleum mists from sulphuric acid manufacture, NOx from nitric acid
manufacture, using packed tower scrubbers, venturi and eductor venturi scrubbers,
SCR de NOx systems and Monsanto Mist Eliminators.
Manufacturing
We have used scrubbing systems to treat amines
and chlorine from foundries, odours from rubber processing,
phenol/formaldehyde
from evaporative cooler manufacturing,
ethanol from brake manufacturing, an RTO to treat paint solvents from an automotive
paint line, a regenerative activated carbon system to treat solvents from adhesive
tape manufacture, Kimre pads to treat acid mists from lead acid battery manufacture,
and many more.
One of the more difficult industries
owing to the extremely severe operating environments that
scrubbing systems have
to work under. EGL has supplied most
of the major scrubbing systems to this industry over the last thirty years, using
a combination of venturi scrubbers, eductor venturi scrubbers and packed tower
scrubbers. With the development of Kimre pads EGL was pro-active in moving to
their use as the mass transfer media of choice for applications in this industry.
Applications have been for Dens off gases, hygiene scrubbing systems, drier/granulation
system exhausts etc.
Pulp & Paper
We have supplied chlorine and chlorine dioxide
scrubbing systems for bleach plants and sulphur dioxide scrubbing
systems for pulp mills. If required we can design
systems to use in house liquors such as extract filtrate or white liquor as scrubbing
media in the bleach plant. Special materials for tower packing and for the scrubber
vessels are used to handle the highly corrosive conditions encountered.
Pickle line scrubbing systems are a major application in
the steel industry, scrubbing hydrochloric acid mists and
vapours.
We have supplied numerous systems
to Australia’s leading steel manufacturer for this application. We have
also supplied hydrofluoric acid scrubbing for a stainless steel mill, Kimre
pads for chromic acid mist removal in chrome plating operations and NOx scrubbing
systems for bright dip baths in aluminium anodizing.
Electronics/Semi-conductor/Optical
Fibre
These industries use a range of specialist gases in their
manufacturing operations resulting in a very mixed load of
emissions, both
particle and vapours. EGL
have successfully applied a number of venturi/crossflow packed scrubber
combinations to these applications for a number of clients,
as well as other scrubber
system types for ammonia and hydrochloric acid.
Food
This sector generates a wide variety of emissions requiring
control. Applications we have handled include odours
from cooking operations, pet food manufacture,
fish processing, margarine manufacture, yeast fermentation and chicken
processing, sulphur dioxide from starch manufacture, ammonia from gelatine
manufacture,
acetic acid from salt manufacture and many more. These use a variety
of packed tower
scrubber types and scrubbing chemicals. Many of these and others also
involve particle collection from drier exhausts and
the like. Venturi scrubbers
of various types have been used for most of these.
Waste Processing Applications here range from a number of
biofilter prescrubber/humidifers to high efficiency acid
gas/submicron particle scrubbing systems
on medical waste
and hazardous liquid waste incineration facilities. These range
from simple packed tower scrubbers to systems involving high
temperature
quench chambers,
high pressure
venturi scrubbers, packed tower scrubbers and Monsanto mist eliminators.
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