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

• Safety!
• The reactant products for CD-MAX units

when accidentally mixed, produce liHle chlorine dioxide.

• This is completely the opposite with the
• ther forms of chlorine dioxide where the

reactants are designed to react within seconds at room temperature

ChemE Solu@ons CD-MAX 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! 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.

CD-MAX Advantages!

Chlorine Dioxide Generator Comparisons

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

Generator Type

CD-MAX Advantages!

CD-MAX Chlorate/Peroxide Chlorite

Rela@ve Chemical Costs For Chlorine Dioxide Chemistries

CD-MAX

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