ProMinent Australia Head Office - Sydney
Unit 4, 4 Narabang Way BELROSE NSW 2085
PO Box 85, BELROSE WEST NSW 2085
Ph: (02) 9450 0995 Fax: (02) 9450 0996 Fax (02) 9450 0994 -
for orders
Email:[email protected]
Website: www.prominentfluid.com.au
ProMinent Melbourne Office
1/21-22 National Drive HALLAM VIC 3803
Ph: (03) 8795 7430 Fax: (03) 8795 7431
Email: [email protected]
ProMinent Brisbane Office
1/68 Murdoch Circuit ACACIA RIDGE QLD 4110
PO Box 6024 Upper Mt Gravatt QLD 4122
(07) 3213 1900 Fax: (07) 3272 0445
Email: [email protected]
Fluorideby ProMinent May 2016
Fluoridation of drinking water remains the most significant
dental health program in New South Wales and Australia.
The advantage of water fluoridation is that the entire
community benefits from the preventative measure, regardless
of age, socio-economic level, educational achievement,
individual motivation, or the availability of dentists.
Fluoride packages and installations have to meet strict guide
lines. In New South Wales where ProMinent Australia have
supplied more than 70 systems, there is a fluoride code, ‘Code
of Practice for the fluoridation of Water Supplies Act 1957‘ This
code was published by the Oral Health Branch of the Dept of
Health and revised in August 2002.
This code has also been accepted by other Australian states
as the bench mark for fluoride installations.
Fluoridation
TYPES of FLUORIDE
Fluoride is available commercially in 3 different ways, 2 are powders the other a
liquid. Each display different concentrations of available fluoride ions & solubility
Powders
Sodium fluoride (NaF) - most expensive, 44% by weight available fluoride ion
(solubility is 4.0%)
Sodium Silicofluoride (Na2SiF6) - 60% by weight available fluoride ion (solubility
0.4%, nominal design solution strength 0.2%)
Liquid
Hydrofluosilicic acid (H2SiF6) - liquid – up to 29% by weight available fluoride
ion
Some of the Fluoride Packages ProMinent can offer
Saturator 5kg
Container
Saturator
Vacuum load of
25 kg bags
Sodium Silicofluoride Vacuum load Crane & hoist bulk bag unloader Vacuum bulk bag unloader
Sodium Fluoride Saturators
With ProMinent 5kg or vacuum load saturators, we offer both down flow with
filter media and up flow with external filters.
Sodium fluoride has a reliable saturation solubility of 4%.
Excess sodium fluoride powder is placed in a dissolving tank and the
constant 4 % solution of sodium fluoride produced is dosed into the
water supply in proportion to the mains mag flow meter milliamp signal.
The ProMinent metering pump is set to display the total amount dosed.
This is to be compared daily against the total water flow to ensure
correct dosing has taken place. The metering pump has a monitor to
detect if the dosing has stopped and alarm accordingly.
5kg Saturators
ProMinent’s 5-250 sodium
fluoride saturator was
designed for small water
supplies up to around 2
Ml/day, but can be used for
much larger plants than this.
Featuring patented
container cutter, loader
& water flushing device
5kg saturator in a portable shed
ProMinent organised the supply of sodium
fluoride granules in a 5 kg screw-top, foil-
sealed plastic containers.
To ensure easy and dust free unloading of
this sodium fluoride container, ProMinent
designed and patented a special loader to
accept the container, slice the seal, and
allow the powder to dump into the
saturator tank.
Then by the push of a button the container
can be flushed with clean water to allow
the jar to be easily disposed of in the
normal plastic recycling.
Loading of the 5kg jars of sodium fluoride powder
Firstly remove the screw top cap from the 5 kg fluoride container.
Check the security of the container seal. Remove the delivery
protection cap from the container unloader. Invert the 5 kg container
and screw clockwise into the unloader until it seats.
Remove the black positioning plug stop. Holding the red handle,
rotate the top of the loader with the container attached, in an
anticlockwise direction.
As it rotates the container seal will be cut to allow the contents to fall
into the saturator solution tank below. About 10% of the seal will
remain intact to prevent it from also from falling into the tank.
Now that the container is empty, hold the water flush button. This
opens a water flush line to wash the inside of the bottles. Slowly
rotate the red handle backwards and forwards to flush clean the
bottle. When the bottle is clean return the red handle to the start
position.
Replace the black positioning stop to prevent holder
rotating while unscrewing the bottle.
If no further containers are to be unloaded, either leave the
flushed container in place until the next unloading of
chemical is required or replace the attached cover.
To install more containers, remove the empty clean
container for disposal with your plastic recycling. Load up a
new container as described above.
When flushing the containers, if one flush was not sufficient
to clean the insides of the container, repeat the flush cycle
again while rotating the container.
While ever the minimum NaF bed depth of 150 mm is
maintained (requirement from NSW fluoride act) a 4%
sodium fluoride solution will be available for dosing into the
water supply in proportion to the mains 4-20 mA mag flow
signal.
Down flow saturators
Setting a down flow Saturator in Operation
To set a down flow saturator in operation fill the saturator tank
with 2 courses of media sand (see media depth diagram)
Fill the saturator tank with water allowing space for powder to
be added.
Prime the dosing pump (as detailed in the enclosed pump
manual). Calibrate the pump to the flow signal so as to give a
dosing rate of 1 mg/litre when pump stroke is on 95% and code
lock the pump. (Variations to 1 mg/litre will apply in some hotter
locations or where there is a higher than normal natural fluoride
levels in the water.
Due to the toxic nature of the fluoride solution, ProMinent
recommends that the above steps be carried out without the
presence of fluoride. Fluoride can be added when the system is
calibrated, tested and ready to set into service.
The raw water enters the tank
through a lateral pipe system that sits
under the undissolved sodium fluoride
powder. The water passes through
the fluoride and becomes saturated to
4%.
Sodium fluoride (supplied in 5kg
screw-top sealed plastic containers)
is added to the saturator tank via the
bottle cutter.
Up flow saturator
A saturated solution is reached
when there is un-dissolved granules
present inside the tank. NSW
regulations require a minimum depth
of 250mm of un-dissolved granules
at all times for an up flow saturator.
The saturated solution is drawn from
the saturator tank from a baffled
outlet. It is drawn through 2 inline
cartridge filters to prevent
undissolved fluoride particles being
metered into the water supply.
For water supplies up to10 Ml/day
ProMinent Fluid Controls have a
sodium fluoride saturator with a
vacuum loader for unloading sodium
fluoride granules from 25 kg bags.
.
Saturator with vacuum loader for 25 kg bags
The vacuum loader especially designed for fluoride, is
mounted on the saturator and comes complete with dust
extractor, suction wand and a flexible hose. The
ProMinent vacuum loader is suitable for both the sodium
silicofluoride packages and the sodium fluoride
saturators.
The vacuum loader operates as follows:As the powder enters the collection unit, the large volume inside the unit causes the air velocity to drop, allowing the powder to fall to the bottom of the unit.
The air is then drawn upwards, through a filter to remove any powder particles that are still airborne, before leaving the unit via the vacuum motor.
The vacuum wand is constructed from two different diameter
stainless steel tubes. The larger is used to transfer the powder
from the bag to the filtration unit via the vacuum hose. The
smaller allows air to be mixed with the product for efficient
transfer.
Vacuum LoaderWith the vacuum loader switched on, the wand
is inserted into the container or open bag. The
vacuum motor will operate for 40 seconds (or
longer) before stopping.
At this point, the inlet valve will close, and the
pneumatically actuated dump valve at the
bottom of the chamber will open, allowing the
collected powder to drop into the hopper.
A cleaning cycle will also begin. Once the
cleaning cycle has completed, the dump valve
will close, the inlet valve will open and the
vacuum motor will start again.
This valve on the suction side of the vacuum
loader is to prevent powder from blowing out of
the wand during the cleaning cycle.
The ProMinent Vacuum Transfer System
is available in 2 models and includes:
collection chamber
compressed air handling system
suction valve
dump valve
hand held vacuum wand
vacuum motor
Dedicated air supply
(either a compressor or plant air)
The saturator comes as a package all mounted
suitable for ease of installation complete with
overflow, drain, calibration cylinder, isolation valves
and metering pump.
Two mandatory mains water flow switches are to be
fitted in accordance with the fluoride ACT
A calibration cylinder is provided to accurately
calibrate the metering pump against the dosing
conditions.
The metering pump is set to display the total amount
dosed. This is compared daily against the total water
flow to ensure correct dosing has occurred.
Metering pumps are supplied with a flow failure
monitor and alarm relay to alarm if dosing stops.
All saturators are supplied with softeners on the
incoming water.
Sodium Silicofluoride
Vacuum and Bulk bag loading
General Description
ProMinent offer varying packages for sodium silicofluoride preparation and
dosing. A number of different powder loading methods are available such as:
Vacuum loader 25 kg bags
Manual bag loader for 25 kg bags
Bulk bag with conveyor transfer
Bulk bag with vacuum transfer
Bulk bag mounted directly over the day hopper
With all of the above either an integral or attached dust extractor is required, with
the exhaust piped outside the room to near ground level above a water ‘dust trap
tank’.
The control panel is normally mounted on the hopper frame so that it can be pre-
wired and tested before leaving our works. If it is required that the control panel is
to be mounted on the building wall, the package still has to be wired for testing in
our works, separated for despatch and reconnected at site incurring additional
costs.
A typical sodium silicofluoride package could consist of:
Hopper for 36 hours capacity (we would suggest 72) in 304SS
Hopper support frame and base - HDGMS
Bulk Bag loader (painted MS) or
Vacuum loader (304SS) or
Manual bag loader
Control Panel
Dust extractor with exhaust water trap tank
Powder feeder – 316 SS
Loss of weight recording system with chart recorder or digital display
Solution tank with10 minutes retention in – 316 SS or HDPE
Stirrer – 316 SS shaft and prop
Transfer pump – Spectra PC or Peristaltic or Gravity feed with flow control
Accessories like water softener, compressor etc. – as required
Sodium Silicofluoride with vacuum loader
Vacuum loader
Hopper with at least
36 hours capacity
Hopper support
frame with load cells
Stirrer
Powder feeder
Solution tank
Transfer pump
Typical Sodium silicofluoride skid mounted package
with vacuum loader and DULCOflex transfer pump.
The walls of the fluoride room have to be smooth and have no horizontal
grooves to catch fluoride dust. Windows are to be flush on the inside.
Provision has to be
made for storing 90
days supply of fluoride
powder inside the
fluoride room. (NSW
Fluoride Act)
Fluoride packages can be
gravity fed or transferred to
the injection point via a
ProMinent Spectra
progressive cavity or
DULCOflex peristaltic hose
pump.
With gravity feed packages,
to ensure a 10 minute
retention time in the
solution tank, we include
flow regulators on the
incoming water.
This shows a manual bag
loader with dust extractor
attached. Product caught in the
dust extractor falls back into
the hopper.
Cheaper grades of fluoride are
available from different
countries. A ProMinent
crumbler can be fitted between
the bag loader and the hopper
for removing lumps from poorer
quality sodium silicofluoride.
Inside a typical sodium silicofluoride room,
this plant suitable for 20 Ml/day water supply.
Typical sodium silicofluoride
vacuum load package
ProMinent use 3 load cells on smaller packages and 4 on larger,
for the loss of weight recording. The 24 hour recorder chart
would normally be replaced only when hopper is refilled.
Low level switch is
required to protect
the equipment.
High level is set to
alarm on overflow
and can be set to
close a solenoid
valve on the inlet
water.
Control panel showing the mimic and a
circular (24 hr) chart recorder to record
loss of weight.
A digital indicator may be
accepted as an alternative.
If the water hardness exceeds 75 mg/l as calcium carbonate a water softener
may be required.
There are two control methods
a) Constant solution transfer with varying solution strength
b) Constant solution strength with varying solution transfer
Stainless circular solution
tank with floor mounted
stirrer. ProMinent PE tanks
with tank mounted stirrer
are an alternative.
Tank has a baffle to
prevent the direct passage
of powder that has not
dissolved short circuiting to
the outlet. The outlet from
the tank is about 100 mm
from the bottom.
Bulk Bag InstallationsFor unloading from bulk bags we offer the following:
Loading from the bottom of bulk bags using a crane and hoist unloader
Loading from the bottom of bulk bags using a “fork lift” unloader
Unloading from the top of a bulk bag with a vacuum loader.
Crane & hoist Fork lift with spring-lift bag supports ProMinent vacuum unloader
Crane & HoistThe bulk “crane and hoist” bag loader we offer would
normally come with an electronically operated hoist for
lifting the bags and placing them in position. It has a
lifting capacity of 1250 kg and operation is controlled
via a hand held push button pendant on a drop cord.
The double wall design bulk bag interface provides a
dust tight sealed connection to the bulk bag outlet
spout via a spout lock clamp ring.
A dust collection system is manifolded between the
bulk bag unloader and the day hopper with the
exhaust piped outside to above a water trap tank.
At the base of the loader is an intermediate hopper
from where the powder is conveyed to the day hopper,
via a motor driven spiral conveyor of capacity up to
5,000 l/h.
Dust tight connection
Intermediate (floor) hopper
and flexible conveyor
Crane Hoist Bulk Bag Installations
This shows the dust extractor,
intermediate hopper and 2 flexible
conveyors going off to feed two
separate hoppers
This shows a wetting cone eductor feed
package where the solution is fed up
into the solution tank. This package has
one preparation tank with fixed rate
solution transfer and varying solution
strength.
Spent bulk bag being
collapsed by operating
the dust extractor
Height restrictions
When height poses a problem,
we offer a specially designed
eductor and wetting cone
arrangement for mixing the
fluoride and transferring it up
and into the solution tank. This
lowers the hopper considerably
and reduces the building height
requirement.
The ProMinent vacuum package for unloading from the top of bulk bags is
also suitable where height restrictions are a major factor.
ProMinent designed vacuum loader for bulk bags
38
Twin vacuum units
Pneumatic slide gate Hopper & wetting cone
39
Transfer pump skid
Dust tight bag clamp with vacuum ring
Control panel
For the continuous monitoring of
fluoride levels in water supplies, a
ProMinent fluoride analyser is available
with milliamp retransmit and alarms.
The analyser is normally supplied as
backboard mounted with temperature,
fluoride and reference electrodes.
A magnetic stirrer is also provided to
assist with the single or two point
calibration.
Standard unit measures free fluoride
with an optional unit available for total
fluoride.
We also provide a double validation
unit each probe checking against the
other and alarming on fault.
Fluoride Monitor
Solenoid Metering Pump DULCOflex Peristaltic
Motor Driven metering Pump Spectra Progressive cavity
Pump SkidsTypes of Metering and Transfer Pumps for Fluoride
Images show fluoride solution
tanks, vent tanks and peristaltic
transfer pump.
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