Wednesday, 20 November 2019

Chlorine Dioxide Generator

Chlorine Dioxide is now recognized as one of the safest, most effective ideal biocides and sterilizing agents available today. As a result, it is widely used in both large and small scale industrial applications where a potent but environment-friendly biocide is required.
Many of its uses and applications are the US Environmental Protection Agency, WHO, FDA, UK, and EU government-approved: and highly recommended by several researchers 
and research establishments throughout the world.


Chlorine dioxide is a chemical substance with the formula ClO2. it is a yellowish-green gas with high solubility in water and is a very powerful oxidizing chemical at −59 °C. 
As one of many oxides of chlorine, it is a potent and useful oxidizing agent used in water treatment and bleaching. It is highly unstable and hence cannot be stored or transported in bulk. Chlorine Dioxide – What you can't say from its name. All water treatment starts with water disinfection. INDUSTRIAL DEVICES realized disinfecting water properly is as important as treating water and is providing a unique and cost-effective solution for water disinfection or medical care.
We have developed perfectly automatic Chlorine Dioxide generators for water disinfection. CLO2 is
2.5 times more powerful than conventional Chlorine.

Salient Features of Chlorine DiOxide :

There are numerous advantages of chlorine dioxide over disinfectants, notably chlorine, including:
Chlorine dioxide (ClO2) has a higher disinfection potential than chlorine and is 2.5 times more powerful than chlorine.

No pH dependence – Chlorine dioxide is an effective disinfectant, even at high pH levels where chlorine loses much of its disinfection potential.

No THM formation – Unlike chlorine, chlorine dioxide doesn't mix with humic or fulvic acids in surface (river) water to make trihalomethanes, suspected carcinogens.

No combination with ammonia – Chlorine dioxide does not combine with the ammonia in water, like chlorine, requiring smaller doses to achieve disinfection.

No chlorophenol formation - Chlorine combines with phenols to create chlorophenols, inflicting taste and odor issues. Chlorine dioxide destroys phenols, eliminating many tastes and odor problems.

Oxidation of iron and manganese - Chlorine dioxide rapidly oxidizes soluble iron and manganese to an insoluble state for flocculation and filtration. Chlorine alone takes days to oxide manganese, and cannot oxidize chemical change iron.

Oxidizes sulfides without high pH - Sulfide oxidation using chlorine requires high pH to prevent the formation of colloidal sulfur, which can plug up equipment. Chlorine dioxide could also be used over a broad pH vary (5-9) without colloidal sulfur formation.

No loss due to storage – Chlorine concentration in a tank of 12.5% sodium hypochlorite solution is subject to varying decay rates based on ambient conditions. Sodium chlorite and hydrochloric acid may be stored for more than a year without significant decay.

There are many methods to produce ClO2. Most other ClO2 systems mix chlorine gas and sodium Chlorite or they use acid mixed with Sodium Hypochlorite to release chlorine gas and sodium chlorite.

Method of Generation of the proposed system:-

The system is designed to produce ClO2 based on an acid-chlorite process. This process activates sodium chlorite with hydrochloric acid to generate chlorine Dioxide using the reaction.

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

The generators are available in 2 versions. Smaller capability models use dilute 9% HCl and 7.5 % NaClO2 and the larger models use concentrated chemical of 32% HCl and 25 % NaClO2. 
Dilution Water is added to stay the concentration within the reactor low and Chlorine DiOxide solution will have a 2% concentration.

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