Two Reaction Chemistries that Produce 30 lbs to 10,000 lbs/day of ClO2

The ADOX™ MG platform engineered by International Dioxcide is a complete chlorine dioxide generator in a self-contained modular design that is easy to install and requires a small footprint. The ADOX™ MG can produce chlorine dioxide using one of two reaction chemistries listed below, and both models are certified by NSF for standard 61.

A supply of potable quality water, precursor chemical feed lines, a chlorine dioxide application line, and a power feed are the only connections required for most ADOX™ MG installations.

The critical design principle in the ADOX™ MG generator is the reaction and delivery of chlorine dioxide in a safe, reliable, and easy-to-operate manner. All ADOX™ generators are affordable and safe, highly efficient systems that can typically be installed and operating in one to two days.

This brief video demonstrates how the ADOX MG generator works, its conversion efficiency, and key safety features.

The ADOX chlorine dioxide generator by International Dioxcide. Built with more than 65 years of chlorine dioxide technology and the International Dioxide experience you can trust. The ADOX generator features advanced vacuum technology for maximized safety. The unit is easy to operate and has a highly-efficient simple design. Plus, it’s made with proven ADOX reliability. The HMI control panel on the ADOX generator allows the operator to turn the system on and off, input operating settings and dosage settings, by means of the touch pad. The water valve opens, the booster pump is turned on, and water starts flowing into the system through the motive water inlet.

Motive water flows through the eductor creating a vacuum. Once water flow is established, vacuum is created and the process interlocks are automatically confirmed for proper functionality. Once the process interlocks are confirmed, the chemical solenoids are then energized and chemical precursors start safely flowing into the generator reaction zone at the desired amounts inputted in the HMI control panel. The sodium chloride precursors are provided by International Dioxcide.

The chemicals immediately react together with the motive water. Because the reaction is done in the motive water that drives the eductor, the concentration of chlorine dioxide in the water is designed not to exceed 3,000 parts per million at any time. The operator receives confirmation of optimal chlorine dioxide operation through the chlorine dioxide analyzer, pH monitor, and/or the unit’s sight glass. The chlorine dioxide solution exits the generator and is fed to the application point. Or, in some instances, a specially designed day tank. The reaction has the potential to yield 100% conversion and the ADOX generator unit’s efficient operation produces fewer unwanted byproducts of unre reacted chloride and chloride ions. The ADOX generator will also achieve greater than 95% efficiency of the theoretical yield potential.

The ADOX generator features advanced vacuum feed technology that has been engineered for maximum safety. The three keys to an inherently safe design? Robust process interlocks; confirmation of process conditions; and vacuum chemical delivery. All precursor chemicals are drawn to the generator under vacuum, creating a safer environment. In the absence of motive water flow, no vacuum is created and, therefore, no precursor chemical flow is possible. A water flow meter is incorporated in the process interlocks to confirm adequate motive water flow. Until confirmed, the chemical solenoids won’t open to actuate with fewer moving parts and a vacuum chemical delivery design. There is less opportunity for leaks and drips in the ADOX generator, which minimizes potential operator exposure. concerns. If leaks in the chemical lines did occur, air would be pulled in and bubbles would form in the chemical line and rotameter.

Additional operator feedback is provided by one of several indicators, including pH, sight glass and/or the chlorine dioxide analyzer equipment. On scheduled shutdown or alarm condition or emergency stop, the chlorine dioxide solution is purged from the system with water. The three chemical precursors react in the motive water. The concentration of chlorine dioxide in the water is controlled to not exceed 3,000 parts per million, which is a safe concentration within the solubility limits of chlorine dioxide gas in water. Sample valves are multi-turn valves to minimize accidental release.

Some vacuum or pump-based systems pre-react the precursor chemicals in a chamber prior to dilution in water. Creating very high concentrations of chlorine dioxide can exceed 100,000 parts per million. This has the potential to expose operators to high concentrations of chlorine dioxide while the system is being serviced. Pump-based systems have chemical lines that are all under positive pressure, creating a potential safety hazard. Pumped chemical systems have the potential to expose operators and the facility to hazardous conditions if a chemical precursor feed line breaks or a gasket fails while under pressure.

The fully-automated design sequence uses International Dioxcide’s 65 years of chlorine dioxide experience to minimize and simplify any operator interfaces. The user-friendly HMI interface simplifies critical operating tasks, such as setting up the desired treatment parameters, rotameters, or control valves ensure the chemical precursors are fed precisely to achieve the desired dosage entered into the HMI interface. All parts are selected by International Dioxcide to withstand chemical conditions typically associated with their use. Ease of use, low drain for freeze protection, three-way valve to manually purge all chemicals for maintenance purposes. All valves are labeled for open or closed position while in normal operation.

The unique design allows for easy capacity changes. The generator uses multiple union connections for easy access. The advanced vacuum design eliminates the need for chemical pumps and minimizes moving parts that require service. Pre reaction based systems form salt scale buildup in the pre reaction zone, which negatively impacts production and efficiency. This salt scale can form in a few hours, resulting in a loss of vacuum and frequent operator adjustments to maintain proper dosage. This will require frequent operator service using hazardous chemicals to remove the salt scale.

Every project includes a thorough survey, specification check, proposal, and design review. International Dioxcide provides customized automation and layout design to meet your specific needs. You’ll receive 3D-drawings and a detailed operation manual for each unit. Safety and operation training is provided by International Dioxcide’s application experts and/or partners of International Dioxcide to ensure maximize safety. The ADOX chlorine dioxide generator has undergone rigorous safety testing and conforms with a wide array of certifications and approvals. Contact your International Dioxcide dealer today to find out more about the ADOX chlorine dioxide generator.

Installation Is Easy

The ADOX™ MG is manufactured so that all desired modules are already interconnected. This allows for a rapid installation at your facility and minimizes skilled labor resources. Each generator is safety engineered to reduce the hazards of operating and servicing the generator. We extensively use low voltage components to reduce electrical hazards and all generators are designed to be easily flushed to minimize any chemical hazards on shutdown. Each of the optional features are easy to integrate because of the modular design with simple connections. Pipe unions and high-quality tubing fittings are used for fast and reliable connections.

Engineering Considerations And Support

International Dioxcide engineers, designs, manufactures, and tests its chlorine dioxide generators with in-house resources. Each generator is tested to ensure the machine meets your specification in your environment. This ensures smooth installation and commissioning.

Custom Configurations

International Dioxcide custom engineers chlorine dioxide generators to meet the needs of any unusual application requirement. International Dioxcide’s support capabilities include all the required technological and analytical capabilities necessary to assess and design specific treatment needs and to help deliver the desired performance objectives. We also offer on-site customer assistance programs that are tailored to support the successful application of chlorine dioxide at your facility.

The ADOX™ MG generator can use one of two reaction chemistries to produce chlorine dioxide:

When Chlorine Gas is Unavailable

The ADOX™ MG can use sodium hypochlorite and hydrochloric acid to react with the precursor sodium chlorite to produce chlorine dioxide (2NaClO2 + NaOCl + 2HCl → 2ClO2 + 3NaCl + H2O).

When Chlorine Gas is Available

Alternatively, the ADOX™ MG can use chlorine gas to react with the precursor sodium chlorite to generate chlorine dioxide (2NaClO2 + Cl2→ 2ClO2 + 2NaCl)

Either of these reactions can theoretically yield 100% conversion of sodium chlorite to chlorine dioxide and a generator efficiency of greater than 95% of the theoretical yield is achievable. Production capacities can range from 30 pounds per day to 10,000 pounds per day.

The ADOX™ MG design centers around a safe, reliable, and easy-to-operate chlorine dioxide generator platform. The ADOX™ MG utilizes an eductor so that the precursor chemicals are drawn from their storage under vacuum and remain under vacuum until the safely diluted reaction is complete. The proper flow of the motive water through International Dioxcide’s eductor-based technology creates a vacuum, which ensures that chemicals are only drawn into the generator when motive water is flowing. This approach minimizes any chance for precursor leakage or unsafe chemical reactions.

The vacuum-based ADOX™ MG design eliminates the need for metering pumps with their inherent need for frequent maintenance, reliability problems, and concerns with high pressure leaks of hazardous chemicals. If the motive water supply water is lost, vacuum is no longer being created and chemicals will stop being pulled into the generator. The ADOX™ MG chemical reaction takes place in the dilution water to ensure that the chemical concentrations are proportionally maintained at a safe level; whereas, this would not be the case with metering pumps or pre-reaction type designs.

The ADOX™ MG utilizes a simple and easy-to-learn operational interaction between the user and the generator equipment making the task of operating the generator effortless. To ensure reliable operation International Dioxcide engineers selected generator components that have met International Dioxcide’s stringent standards for quality and reliability during the company’s 75+ years of operation. If service is needed the user-friendly design layout will make the repair easy for trained staff. All electrical systems are audited to UL 508 standards.

The ADOX™ MG generator has a flexible alarm architecture that allows you to configure most alarms. You are able to configure the system to alarm on practically any measured condition that is not as expected. These include:

  • Loss of motive (or supply) water flow or pressure deviations
  • Water valve failure
  • Loss of power
  • Loss of chemical precursor(s)
  • Bulk chemical supply alarm (selectable feature)
  • pH deviation (selectable feature)
  • Emergency stop activation

Case Study

Government Facility Achieves Greater Conversion Efficiency at >300 LB/day

ERCOPure™ ClO₂ technology was selected to replace incumbent chlorine dioxide technology that was no longer meeting the operational and production needs at a critical government facility. International Dioxcide collaborated with a large multinational water treatment service provider to select, design, and install a new chlorine dioxide generator that fit the needs of the end customer.

Government Facility ClO₂ Generator

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