Re- Thinking Chlorine Dioxide Chlorine Dioxide genera/on technology - PowerPoint PPT Presentation

Re- Thinking Chlorine Dioxide Chlorine Dioxide genera/on technology has not been changed since the development of chlorate peroxide systems in the early 2000’s. But this technology has some limita/ons and issues that • leave room for improvement including High excess acid use and disposal costs • Chemical handling safety issues • Low chemical efficiency • High distribu@on costs •

Re- Thinking Chlorine Dioxide Industrial process chlorine dioxide genera/on is nearly 100 % efficient in both Acid and Chlorate use. In paper mills this allows the cost of producing chlorine dioxide to be less than 1.00$/lb. To model a small chlorine dioxide system in this manner requires the process to control the sodium sulfate ( a by product of the chlorate sulfuric acid reac/on). This is a complex endeavor! However, for a small system we do not have to be quite as efficient as the big systems, which greatly minimizes the complexity and allows the modulariza/on of the system.

Re- Thinking Chlorine Dioxide The CD-MAX process controls the salt concentra/on in a self correc/ng manner so we can have: 99 % efficiency of chlorate • Very low acid use • A small size generator that can be modular in design and • flexible in capacity

Re- Thinking Chlorine Dioxide At ChemE solu/ons we developed a method to accomplish these goals and developed a simple generator that: Maintains high chemical reac/on rates and conversion • Controls purging of the reactor contents to maintain • sodium sulfate at levels below satura/on. Controls sodium chlorate levels below .5% to maintain • high conversion efficiency.

Chlorine Dioxide Generators CD-MAX generators from ChemE Solu/ons offer several advantages over current technologies on the market when comparing: • Safety • Efficiency • Chemical Distribu6on • Chemistry choices • Cost • Opera6onal op6ons

ChemE Solu@ons CD-MAX Advantages! • Safety! • The reactant products for CD-MAX units when accidentally mixed, produce liHle chlorine dioxide . • This is completely the opposite with the other forms of chlorine dioxide where the reactants are designed to react within seconds at room temperature

CD-MAX Advantages! Advantages! • Efficiency • Based on plant data to date, the chemical efficiency to produce Chlorine dioxide in a CD-MAX unit is 99%. • Acid use efficiency is 50% beHer than once through chlorate/peroxide systems. Excess acid leaving the generator is 3 @mes less. This save a great deal in neutraliza@on costs in air scrubbers.

CD-MAX Advantages! Advantages! • Distribu@on • The Precursors for the CD-MAX generator are widely distributed. If desired, blends can be easily made locally from commodity chemicals. This would allow the ability to have a two chemical system.

CD-MAX Advantages! • Acid choices • CD-MAX can also use sulfuric acid of any concentra@on. Using concentrated sulfuric acid is actually greatly reduces chemical handling and overall costs.

Chlorine Dioxide Generator Comparisons Generator Type Chlorate/ Parameter CD MAX Peroxide Chlorite Number of Precursor 2/3 2 2/3 chemicals Chemistry Chlorate Chlorate Chlorite Chemcal 97-99% 90-95% 80-98% Efficiency Sulfuric 78 Acid Used Sulfuric 93% HCl 93% Quantity of 2.15 5 2.4 Acid as sold lbs Reactants do Chance of Chance of Safety not react fast if serious serious considerations accidentally reaction if reaction if mixed reactants reactants mix Excess acid 1.4 lb/lb CD 3.2 lb/lb CD .5 lb/lbCD

CD-MAX Advantages! Rela@ve Chemical Costs For Chlorine Dioxide Chemistries CD-MAX Chlorate/Peroxide Chlorite

CD-MAX Contact us for a discussion on how ChemE Solu@ons Can save you money in your Chlorine Dioxide Applica@on.