Chlorine Dioxide

Chlorine dioxide is one of the fastest growing Chlorine alternatives in water treatment solutions. This technology offers the benefits of effectiveness at high pH, being unaffected by ammonia, and demonstrating significant advantages over Chlorine in systems susceptible to high levels of organic contaminants. Because Chlorine dioxide is a selective oxidizer, its ability to control microorganisms in water at very low dosages makes it an especially cost effective solution.

Major Advantages of Chlorine Dioxide

Chlorine dioxide is effective over a broad pH range.
Chlorine dioxide has 2.5 times the oxidizing capability of Chlorine.
Required contact time for Chlorine dioxide is lower compared to Chlorine.
Chlorine dioxide destroys phenols and its derivatives.
Chlorine dioxide has the ability to penetrate and remove biofilm formed and kill bacteria, spores and viruses.
Chlorine dioxide is less corrosive than chlorine and does not hydrolyze to form acid.
Chlorine dioxide does not form chloramines.
Chlorine dioxide does not form trihalomethanes upon reaction with organic matter.

Overview

Delivering Performance, Efficiency, and Reliability to the Petrochemical Industry

At Dorf Ketal, our success in the petrochemical sector stems from one principle: listening to our customers. By understanding the unique challenges you face in a rapidly evolving production environment, we have developed innovative chemistries and problem-solving services that deliver the performance, efficiency, and reliability your operations demand.

Common Applications of Chlorine Dioxide

Food Processing-fresh pack, processed foods, cold storage
Wine Production
Drinking & potable water production
Iron & manganese oxidation & color removal
Pulp Bleaching
Odor Control- Bio composting
Odor Control- Rendering
Effluent Water Treatment

Well casing & formation disinfectant- all well types, potable, remediation to oil field
Odor Control- mercaptain, hydrogen sulfide oxidation
Cooling tower- biological control / MIC control
Slimicide- many applications
Ethanol production- cooling towers, fermentation
Phenol, cyanide oxidation
Elimination of usage of Chlorine
Many more

Chlorine Dioxide Generation Methods

Dorf Ketal designs and manufactures Chlorine dioxide Generators CLOGEN of various capacities based on oxygen demand, application type and overall cost effectiveness. Dorf Ketal has developed generators of all types: from simple generators with pumps and control panel to fully integrated systems, our generators are customized to meet every client need.

With more than 400 installations all over India and also in Asia / Africa, Dorf Ketal is one of the largest manufacturers of the generator in India.

Chlorine dioxide is usually generated by one of three methods, each of which are both efficient and cost effective viz. by Chlorine Gas method, Sodium Hypochlorite method and by acid activation of Sodium Chlorite. The three methods are explained below in option I, Option II and Option III. In each method Chlorine Dioxide is generated at site through a specialized ClO2 generator.

OPTION I: Chlorine Gas Method (Single Pump Method).

In the generator unit, Chlorine dioxide is generated by a chemical reaction that occurs when a controlled volume of precursor chemical (NaClO2) is combined with a water stream containing Sodium Hypochlorite and a Hydrochloric Acid.

Following is the reaction for generation of ClO2 by Chlorine gas method

2NaClO2 + Cl2 → 2ClO2 + 2NaCl

OPTION II: Sodium Hypochlorite Method (Three Pump Method).

Following is the reaction for generation of ClO2

2NaClO2 + NaOCl + 2HCl → 2ClO2 + 3NaCl + H2O

OPTION III: Acid Activation of Sodium Hypochlorite Method (Two Pump Method).

Following is the reaction for generation of ClO2 by HCl method

5NaClO2 + 4HCl = 4ClO2 + 5NaCl + 2H2O

Typical Integreated Scheme for Chlorine Dioxide Generation and Dosing

Design, Supply Manufacturer, Erection & Commissioning / Operation and Maintenance.
2 Nos. (1W + 1S) of In Situ chlorine – dioxide generators auto mode.
2 Nos. (1W + 1S) of Hydrochloric acid (30-33%) unloading pumps with necessary accessories.
2 Nos. Hydrochloric acid bulk storage tank with nozzles, vents, fume absorber, neutralization system, drains, overflow etc.
2 Nos. (1W + 1S) HCl dosing system comprising of dozing pumps of PP construction, PRV, PG, auto & manual valves etc.
2 nos. (1W + 1S) Sodium chlorite unloading pumps of PP construction with necessary accessories.
2 nos. NaClO2 bulk storage tanks with nozzles, vents, level control units etc.
2 nos. (1W + 1S) NaClO2 dosing system comprising of dozing pumps of PP constructions, PRV, PG, auto & manual valves etc. as per system requirement
2 Nos. (1W + 1S) water dilution dozing horizontal pumps with necessary accessories.
PLC or controller based system as per customer requirement shall be designed appropriately (Redundant & Non Redundant type )
Online pH analyzer/ Residual Chlorine dioxide analyzer.
Online gas leak detector
Flow meters on all chemical feed lines, dilution water lines, and chlorine dioxide solution lines
Supply of Chemicals
O & M services for the system

Water Treatment