RiteDos™ Chlorine Dioxide Generators

Chlorine dioxide is considered much more powerful than chlorine or sodium hypochlorite, which are used in potable water disinfection or as antifouling agents in seawater.
NanoWater Chlorine Dioxide Generator Available in five different Models depending on the customer budgeting factors.
Two Precursor or Three Precursor Generating Safe and Efficient Chlorine Dioxide Solution Chlorine Dioxide is one of the safest and most effective biocides and disinfecting agents available

● 5NaClO2 + 4 HCl →4 ClO2 + 5 NaCl + 2 H2O
● 2NaClO3 + H2O2 + H2SO4 → 2ClO2 + 2H2O + Na2SO4 + O2
● 2NaClO2 + NaOCl + 2HCl → 2ClO2 + 3NaCl + H2O
● 2NaClO2 + Cl2 → 2ClO2 + 2NaCl

Chlorine dioxide generator is designed to produce and consistently maintain a product yield greater than 95%, which makes it ideal for drinking water treatment. 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.

CL2O PROCESS FLOW DIAGRAM

PATENTED REACTION CHAMBER

NanoWater Manufacturers two main types of Chlorine Dioxide Generator:

  1. Reaction Column Type Generator: Here the generation is done in a towering column where the two precursors are injected in a reaction column along with water and the produced ClO2 is dosed to the application point
  2. Underwater Type Generator: Here the generation is done underwater at the point of application. The precursors are injected into a specially designed mixing chamber, made out of non-corrosive material.
    Proprietary mixing reactor (NanoFlow™ Reactor ) has been developed by NanoWater engineers ,hence The chemicals are mixed perfectly in a reactor for maximum output with the lowest possible consumption of chemicals and maximum operating safety ,the reactor is made of food-safe PVDF.

CL2O SYSTEM SALIENT FEATHERS

  • Instantaneous chlorine dioxide production can be controlled from 2,000 mg/L – 20,000 mg/L concentrations
  • Flow-proportional dosing control
  • Add-on option for chlorine dioxide sensor system to control to a measured residual setpoint
  • Inputs for water meter signal, stand-by control, chemical tank levels
  • Flow and tank level alarms
  • Metering pumps for acid, sodium chlorite and dilution water
  • All metering pumps feature flow monitoring control
  • Multi-function valve for pressure, safety, anti-siphon & bleed
  • Permanent data storage via system data logging
  • webserver communication available via modem or Ethernet options
  • Remote alarms via SMS/email
  • Ethernet module (option)
  • protection for control instrument and metering pumps
  • Options available for chlorine dioxide gas leak detection (with alarms), system purging
  • Reaction takes place at controlled pressures
  • Systems sized for large-scale applications
  • The chlorine dioxide solution produced is highly stable
  • No chlorine dioxide loss due to the closed reaction chamber

PROCESS DESCRIPTION

The chlorine dioxide generation system shall be an all-liquid type with various production capacities . The units are designed to produce and consistently maintain a product yield greater than 95%.
The system shall be a two or three chemical reagents type, utilizing diluted hydrochloric acid and sodium chlorite and other chemicals , fed at a 1:1 ratio, in the production of chlorine dioxide gas. 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. NanoWater supplies , manual and Automatic generation systems
1- Manual Systems Reagent flow into the system, or reagent pump flowrate, shall be manually controlled via the operator interface keypad on the controller, thereby controlling the rate of chlorine dioxide gas production.
2- Automatic Systems The chlorine dioxide generating system shall be flow paced. Reagent flow into the system shall be controlled by the 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 patented reaction chamber, mounting plates, ejector and mixing chamber shall be constructed of PVC.

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.

APPLICATIONS

Municipal Applications • • • •

  • Drinking Water
  • Iron and Manganese Control
  • Taste and Odor Control
  • Wastewater Treatment

Industrial Applications • • • • • •

  • Cooling Water Disinfection
  • Process Water
  • Legionella Control
  • Food & Beverage Industry
  • Dairy Industry
  • Bleaching Processes (pulp & paper)

Oil & Gas Applications • • • • • •

  • Hydraulic Fracturing
  • Bacteria Sterilization
  • Brackish Water Treatment
  • Sulfite Scale Prevention
  • Solids &Iron Removal
  • Scale Inhibitor
  • H2S Scavenger

DESIGN PRINCIPLE

  • High Yield: Generator has been designed to produce and consistently maintain a product yield greater than 95%.
  • 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.

Leading Design, Manufacture, Engineer, Supply of Water Disinfection Systems & Products

Criteria for Generator Selection and Design

RiteDos™-2C Series

  • 5 NaClO2 + 4 HCl →4 ClO2 + 5 NaCl + 2 H2O
  • 7.5% sodium chlorite with 15% hydrochloric acid
  • This reaction theoretically yields 80% conversion of sodium chlorite to chlorine dioxide
  • Generator efficiency of greater than 95% of the theoretical yield is achievable
  • Effective Yield: 72%
  • Inherit Safety: Low, with traditional pump-based systems
  • Clo2 Purity: good, Excess acidity and unreacted chlorite, Substitute other acids
  • Service complexity: Minimal
  • Advantage: No excess Chlorine, Good for low volume applications (< 400 g/hr)
  • Simple equipment

RiteDos™-2CPlus Series

  • 5 NaClO2 + 4 HCl →4 ClO2 + 5 NaCl + 2 H2O
  • 31% sodium chlorite with 30-33% hydrochloric acid
  • This reaction theoretically yields 80% conversion of sodium chlorite to chlorine dioxide
  • Generator efficiency of greater than 95% of the theoretical yield is achievable
  • Effective Yield: 72%
  • Inherit Safety: Low, with traditional pump-based systems
  • Clo2 Purity: good, Excess acidity and unreacted chlorite, Substitute other acids
  • Service complexity: Minimal
  • Advantage: No excess Chlorine, Good for high volume applications (> 400 g/hr)
  • Simple equipment

RiteDos-3™ Series

  • 2NaClO2 + NaOCl + 2HCl = 2ClO2 + 3NaCl + H2O
  • 12.5% sodium chlorite with 30-33% hydrochloric acid
  • This reaction theoretically yields 100% conversion of sodium chlorite to chlorine dioxide
  • Generator efficiency of greater than 95% of the theoretical yield is achievable
  • Effective Yield : 95%
  • Inherit Safety: High – with vacuum based systems
  • Clo2 Purity : Excellent , Can substitute other acids.
  • Service complexity :
  • Advantage : Minimal excess chlorine ,Least amount of by-products
  • Capacity Range :0.5-17kg/hr

RiteDos-3Plus ™ Series

  • 2NaClO3 + H2O2 + H2SO4 → 2ClO2 + 2H2O + Na2SO4 + O2
  • 31% sodium chlorite with 30-33% hydrochloric acid
  • This reaction theoretically yields 100% conversion of sodium chlorite to chlorine dioxide
  • Generator efficiency of greater than 90-95% of the theoretical yield is achievable
  • Effective Yield : 95%
  • Inherit Safety: Has real risks that must be considered
  • Clo2 Purity : Purity isn’t as good ,Excess acidity, Perchlorate, Chrome
  • Service complexity: Moderate
  • Advantage: Lowest cost ,Eliminates gas chlorine ,Less chloride ion
  • Capacity Range :0.5-17kg/hr
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Leading Design, Manufacture, Engineer, Supply of Water Disinfection Systems & Products

RiteDos-Ultra™ Series``

The two-part ClO2 generator reacts 25% sodium chlorite and chlorine gas to generate chlorine dioxide. This is the most cost-effective generator reaction if chlorine gas is available. The reaction is shown below:

  • 2NaClO2 + Cl2 → 2ClO2 + 2NaCl

Both chemical reactions listed above can theoretically yields 100% conversion of sodium chlorite to chlorine dioxide and a generator efficiency of greater than 95% of the theoretical yield is achievable.

  • Cl2o Purity :Excellent, excess of Cl2

Advantage: Lowest Cost, Less by-products than chlorate reaction

Theoretically, 1 lb of chlorine gas is required for each 2.6 lb of sodium chlorite. However, an excess of chlorine is often used to lower the pH to the required minimum of 3.5 and to drive the reaction to completion. Sodium hypochlorite can be used in place of the gaseous chlorine to generate chlorine dioxide. This process requires the addition of sulfuric or hydrochloric acid for pH control.

Cost of the Chlorine Dioxide Generator

The cost of a chlorine dioxide generator depends on several variables, including:

  • Generator type
  • Tank options
  • Flow pacing
  • Plant flow range
  • Capacity range
  • Power available
  • Site constraints

Advantage

  • No chlorinated by-products are produced.
  • Chlorine dioxide is much more stable than chlorine and therefore
    has a higher disinfecting capacity.
  • The disinfecting effect is not diminished in water with a pH of 4-10.
  • Chlorine dioxide reliably kills legionella in water and the biofilm
    is sustainably impaired.
  • Chlorine dioxide has very good bactericidal, sporicidal, virucidal
    and algicidal properties.
  • The disinfecting effect is, for example, more powerful than with
    chlorine.

Chlorine Dioxide Solutions Applied Safely and Successfully

A Leading Chlorine Dioxide Provider

NanoWater  is the first choice for businesses considering Chlorine Dioxide. We specialize in delivering Chlorine Dioxide (ClO2) dosing systems using the latest technology and expertise. NanoWater continuously innovates and develops new products and services that purify water and protect against contaminants, allowing businesses to perform as designed. Our team of experienced engineers and project managers ensure we provide a system that is exactly suited to your requirements. You can be assured that our ClO2 systems use the latest technology on the market.

CLO2 GENERATOR MODELS AND TECHNICAL DATA

 

Dilute Chemicals: 7.5% Sodium Chlorite – 9% Hydrochloric Acid

Model

Capacity

Pressure

Dims

Weight

Power Supply

Chemical Consumption

         By-Pass Flow

 
        

                 Min.

 

g/hr

Bar

Cm

Kg

 

L/kg CLO2

 L/hr

L/hr

RiteDos2-1

40

10

120x120x30

20

220-240V,50/60Hz

25

                  1.00

20

RiteDos2-2

50

10

120x120x31

20

220-240V,50/60Hz

25

                  1.25

25

RiteDos2-3

60

10

120x120x32

20

220-240V,50/60Hz

25

                  1.50

30

RiteDos2-4

120

7

120x120x33

20

220-240V,50/60Hz

25

                  3.00

60

RiteDos2-5

220

7

120x120x34

45

220-240V,50/60Hz

25

                  5.50

110

RiteDos2-6

400

10

120x120x35

45

220-240V,50/60Hz

25

               10.00

200

RiteDos2-7

800

10

120x120x36

45

220-240V,50/60Hz

25

               20.00

400

         

Concentrated Chemicals: 25% Sodium Chlorite – 30-33 % Hydrochloric Acid

Model

Capacity

Pressure

Dims

Weight

Power Supply

Chemical Consumption

Water Dilution

Bypass Flow

          

Min

 

g/hr

Bar

Cm

Kg

 

L/kg CLO2

 L/hr

L/kg CLO2

L/HR

L/hr

RiteDos2-1

150

7

120x120x30

20

220-240V,50/60Hz

5.25

                  0.79

36

5.4

75

RiteDos2-2

420

10

120x120x40

40

220-240V,50/60Hz

5.25

                  2.21

36

15.12

210

RiteDos2-3

750

7

120x120x40

70

220-240V,50/60Hz

5.25

                  3.94

36

27

375

RiteDos2-4

1500

7

120x120x43

120

220-240V,50/60Hz

5.25

                  7.88

36

54

750

RiteDos2-5

2250

4

120x120x34

120

220-240V,50/60Hz

5.25

               11.81

36

81

1125

RiteDos2-6

6000

7

120x120x50

260

220-240V,50/60Hz

5.25

               31.50

36

216

3000

RiteDos2-7

10000

4

120x120x50

260

220-240V,50/60Hz

5.25

               52.50

36

360

5000

           

Model

Capacity

Pressure

Dims

Weight

Power Supply

     
 

g/hr

Bar

psi

Cm

Kg

      

RiteDos3-1

190

10

145

1240x650x1500

100

100-240V,50/60Hz

     

RiteDos3-2

470

10

145

1240x650x1501

100

100-240V,50/60Hz

     

RiteDos3-3

950

10

145

1240x650x1502

100

100-240V,50/60Hz

     

RiteDos3-4

1900

10

145

1240x650x1503

100

100-240V,50/60Hz

     

RiteDos3-5

2840

10

145

1240x650x1504

100

100-240V,50/60Hz

     

RiteDos3-6

4730

10

145

1240x650x1505

100

100-240V,50/60Hz

     

RiteDos3-7

9450

10

145

1240x650x1506

150

100-240V,50/60Hz

     

RiteDos3-8

14180

10

145

1240x650x1700

225

100-240V,50/60Hz

     

RiteDos3-9

22700

10

145

1240x650x2050

232

100-240V,50/60Hz

     

RiteDos3-10

26450

10

145

1240x650x2051

240

100-240V,50/60Hz

     

RiteDos3-11

56750

10

145

1240x650x2052

250

100-240V,50/60Hz

     
            

Model

NaCLO2 25-31%

NaCLO2 25%

NaOCL 12%

30-33% HCL

By-Pass Flow @2g/l

 
 

L/KG CLO2

L/KG CLO2

L/KG CLO2

L/KG CLO2

   
 

3.71

4.6

3.73

1.69

   
 

L/HR

GPH

L/HR

GPH

L/HR

GPH

L/HR

GPH

L/HR

GPH

L/MIN

RiteDos3-1

0.7

0.19

0.87

0.23

0.7

0.18

0.32

0.08

91

24.07

1.51

RiteDos3-2

1.75

0.47

2.17

0.58

1.75

0.46

0.8

0.21

228

60.31

3.8

RiteDos3-3

3.51

0.95

4.35

1.18

3.51

0.92

1.6

0.42

457

120.89

7.61

RiteDos3-4

7

1.90

8.7

2.36

7

1.85

3.19

0.84

913

241.53

15.21

RiteDos3-5

11

2.98

13

3.53

11

2.91

4.79

1.26

1370

362.43

22.83

RiteDos3-6

18

4.89

21.75

5.91

18

4.76

8

2.11

2283

603.96

38.05

RiteDos3-7

35

9.51

44

11.95

35

9.25

16

4.23

4565

1207.67

76.08

RiteDos3-8

52

14.13

65

17.66

52

13.75

24

6.34

6848

1811.64

114.13

RiteDos3-9

70

19.02

87

23.64

70

18.51

32

8.46

9130

2415.34

152.16

RiteDos3-10

5

1.35

105

28.53

5

1.32

38

10.05

109956

29088.89

1832.6

RiteDos3-11

100

27.17

122

33.15

100

26.45

45

11.90

12783

3381.74

213.05

RiteDos3-12

210

57.06

261

70.92

210

55.55

96

25.39

27391

7246.29

456.51