Zulu Chlorine Dioxide Generation System


The Scotmas Zulu WR is a chlorine dioxide generation system. Chlorine dioxide is a powerful biocide that, when added at low levels to water systems will kill a variety of bacteria and remove some chemical contaminants from the water stream.

 
 

Unlike a number of other systems on the market, the chlorine dioxide is produced in proportion to demand, and may be supplied directly to a single injection point, or stored in a sealed day tank (optional extra) and distributed to a number of dosing points around the site.

 
 

Chlorine Dioxide is generated in a reaction chamber mounted on the front of the unit from a 7.5% Sodium Chlorite solution and Hydrochloric Acid. A water jacket is built into the reaction chamber to ensure that the risks of any leakage are minimised, and the chlorine dioxide is diluted in a sufficient quantity of water prior to distribution around the site.

 
 

The Zulu WR equipment is designed to integrate with a number of external building management systems, by means of the optional BMS port.  Optional modules that may be integrated into the Zulu unit itself include remote monitoring alarms (Dial Up or GSM/Pager with web access), Data Logging systems (Paperless recording of system performance with output to floppy disk / RS232 port) or a variety of external A/V status monitors and alarms.

 
 

Installed, operated and maintained correctly, your Zulu WR system will provide many years of trouble free service, with minimal user intervention required.

Key features:
•The system is built around the Grundfos DME range of Digital Dosing™ Pumps which deliver a precise amount of chlorine dioxide precursor. Unlike traditional diaphragm dosing pumps, these units have an exceptionally high degree of accuracy, and the unique Stepper Motor option ensures that accuracy is maintained at even the lowest dose and flow rates

•As an additional safety measure, the integrated chemical analyser measures the approximate total chemical content in the water using the principles of redox analysis. Should the analyser detect chemical levels above the user defined parameters, the unit will shut off and trigger an audio/visual alarm with a matched BMS output.

Intended Application
The Scotmas Zulu WR system is designed for the application of low levels of chlorine dioxide biocide (<10 mg/litre) to water streams, in direct proportion to the measured amount of water flowing. The chlorine dioxide dose rate is variable according to user and regulatory requirements.

The equipment is intended for application in the following industries, subject to local and National regulations:

•Water Treatment
•Cooling Water
•Gas Scrubbers
•Process Water Systems
•Food Processing
•Washing Systems
•Filter Sterilisation Applications in Pools

This system is not supplied for use in North America or areas where legislation prohibits its use.



 

 

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Functional Description
Scotmas Zulu WR systems simultaneously dose two precursor chemicals into the water stream via individually controllable Grundfos™ Digital Dosing Pumps. The dosing pumps are controlled and activated by means of an impulse produced from a suitable flow meter or equivalent device, which signals to the equipment that a predefined quantity of water has passed the flow meter

The precursor chemicals, (7.5% Sodium Chlorite and Hydrochloric Acid) are dosed into a chemical  “Reaction Chamber” which is located within the water pipework, or within a water storage tank.

Within the Reaction Chamber, the two chemicals react to produce free chlorine dioxide – a powerful biocide that will react with a variety of contaminants in the water system.

Downstream of the Reaction Chamber, a Redox monitoring probe is installed that will measure the chemical content in the water ( REDOX POTENTIAL ).  Should this Redox potential exceed user defined limits (such as in the event of accidental overdosing), the equipment will activate an alarm, and cease dosing (overriding any pulses received from the flow meter being sent to the dosing pumps)

When the Redox Potential returns to within consent limits, the alarm will automatically reset, and the dosing will be reenabled (the signal pathway from the flow meter to the dosing pumps will be reenabled)

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