The Model T70GD4000 chlorine dioxide generator is designed to produce and consistently maintain a product yield greater than 95%, which makes it ideal for drinking water treatment. It is a two-chemical system, utilizing diluted concentrations of hydrochloric acid and sodium chlorite in the production of chlorine dioxide. No chlorine gas is required. A proven design, durable construction and the use of the best available corrosion-resistant materials assure efficient gas production, precise solution feeding, low maintenance and dependable operation for the life of the equipment.
• All Liquid System: Diluted hydrochloric acid and sodium chlorite are the reagents used to generate chlorine dioxide. No chlorine gas is required.
• Pressure/vacuum process: The generator design combines vacuum technology with dosing pump accuracy to generate chlorine dioxide from low hazard (diluted) sodium chlorite and hydrochloric acid.
• Manual or Automatic Control Options
• Safe Operation: With system shut-down and alarm options.
• Minimum maintenance: Corrosion-resistant materials; All periodic maintenance items are easily replaceable.
The chlorine dioxide gas is drawn out of the reaction chamber under a vacuum produced by the integral ejector where it is mixed with the ejector motive water and applied as a solution. The solution is passed through a sight glass for visual verification of product quality.
The generator is equipped with a check valve on the ejector motive water line and a check valve on the chlorine dioxide solution line. A relief valve is included to protect the pumps from over pressure.
In the event of vacuum loss for any reason, a vacuum switch will send a signal to the Biochem controller. The Biochem controller will shut-down the generator, including the dosing pumps. A low vacuum alarm contact is included. The pumps will not restart until the vacuum switch provides a signal that a vacuum condition exists. The Biochem will also shut-down the generator in the event of a pump failure or loss of reagent flow. The Biochem provides alarm contacts for pump failure, low vacuum condition and low reagent flow.
The system shall be a two-chemical reagent type, utilizing diluted hydrochloric acid and sodium chlorite, fed at a 1:1 ratio, in the production of chlorine dioxide gas. No chlorine gas is required. The reagents are to be metered into the generator by dosing pumps.
The chlorine dioxide gas produced by the generator shall be mixed with the integral ejector motive water and applied as a solution. The generator shall be equipped with a check valve on the ejector motive water line and a check valve on the chlorine dioxide solution line. A relief valve shall be included to protect the dosing pumps from over pressure.
(Manual Systems) Reagent flow into the system, or reagent pump flowrate, shall be manually controlled via the operator interface keypad on the Biochem controller, thereby controlling the rate of chlorine dioxide gas production.
(Automatic Systems) The chlorine dioxide generating system shall be flow paced. Reagent flow into the system shall be controlled by the Biochem controller, that will receive a 4-20 mAdc signal from the process (flowmeter or control source) and adjust the rate of reagent flow accordingly in order to ultimately control the rate of chlorine dioxide production.
The chlorine dioxide generator frame shall be constructed of epoxy resin painted steel. The reaction chamber, mounting plates, ejector and mixing chamber shall be constructed of PVC. The Biochem case shall be constructed of ABS, reinforced fiberglass.
Safety interlocks shall be provided to automatically shut down the system in the event of a loss of vacuum, pump failure or low reagent flow.