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Chemilizer’s Tim Dickson describes successful use
of a Chemilizer CP33 for municipal water chlorination.
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In 2002, a chlorination facility in Fort Myers, FL, was struggling
to find an alternative to gas chlorination. Staff were looking
for a liquid chlorination solution that was powered by the flow
of the water being treated, could be retrofitted into the existing
facilities without costly renovation, and provide accurate, proportional
injection to reach the required residual PPM (± 2%).
The facility found a solution in the form of an injector that
was purchased for under $500. The CP33, manufactured by Chemilizer
Products of Largo, FL, is installed at Fort Myers on 8 inch mains.
The chlorine source is 12 feet from the injector and the chlorine
is injected two feet downstream. Installation was completed in
about 4 hours and no modification of the facility was required,
nor were permits or city inspections needed.
The CP33 injector has been in use at the facility for over four
years. The facility uses a single unit for injection of 12% chlorine
to create 200,000 gpd of potable water.
During the first four years of operation, the injector was used
at various periods during the day. The injector was set for the
maximum water flow rate and remained proportional as the flow
varied. Maintenance on the unit consisted of regular scheduled
cleaning (flushing the injection pump with water) and rebuilding
the injection pump (< $20) approximately every 18 months to
two years. The pump rebuild and replacement was accomplished in
under 10 minutes. Maintenance was accomplished without tools and
without stopping water flow in the main. During the 4th year the
injector motor was rebuilt at a fraction of replacement cost.
Facility operators check on the injector once every day. Proper
operation is determined via a visual inspection of the injection
control panel. PPM level is monitored via a Foxcroft 1000 chlorine
analyzer, capable of reading within ±2%. The injector has
consistently performed within the specified tolerances.
Use of the CP33 by the City of Fort Myers and others proves the
technology is viable for very small to medium-sized water treatment
facilities, and is also ideal for booster stations of major municipalities.
The system consists of three main parts: the water motor, the
injection control panel and the chemical pump. The unit diverts
only enough water to inject the desired amount of chemical. The
rest of the water in the system flows past the injector.
The CP33 is installed using standard plumbing parts and can accommodate
pipes from 1" to 12" and more in diameter. The volume
of injection is adjusted using a simple visual interface. Operational
maintenance can be performed in minutes and requires no tools.
If desired, the unit can be repaired or replaced without stopping
the water flow.
The system injects only when water is flowing, eliminating the
possibility of over injection and under injection, and the injection
point can be up to 100 feet from the injector. Use of multiple
CP33 injectors, placed in parallel, allows for the treatment of
water flows from 12 gpm to 2000 gpm and more. The only real limitation
on the upper flow limit is the logistics of handling and storing
large volumes of liquid chlorine.
WaterWorld September, 2007
Click here to learn more about the CP33.
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