CHLORINE DIOXIDE GENERATOR QUESTIONNAIRE

Mill

Code

Contact

Telephone

Fax (

Generator type

Solvay

Mathieson

HPA

1

Generator design rate

Metric Tonnes/day

Tons/day

2

Operating rates for

a. Softwood

b. Hardwood

3

Generator rate changes

Per day

Per week

Per month
 

4

Decompositions Puffs

Per day

Per week

Per month

Per year

5

Locations of Puff

Generator

Absorber

Spent acid tank

Storage tank

6

Source of puff

Chemical feeds

Dissolving water

piping

Gaskets

7

Start-up shutdown(S/D?)

Per day

Per week

Per month

Per year

8

White outs

Per day

Per week

Per month

Per year

9

Maintenance S/D

Per day

Per week

Per month

Per year

10

Maintenance on equipment

Generator

Absorber

Compressor

Storage tank

11

Maintenance on instruments

Pressure

Temperature

Flow

Analyzer
 

12

Chemical yield
 

yield

lb/lbClO2 kg/kgClO2

i.

NaClO3

 

ii.

NaCl

  

iii.

CH3OH

  

iv.

H2O2

  

v.

SO2

  

vi.

H2SO4

  
 

13

Feed specification

i.

NaClO3

Turbidity

Fe

Ca

Mg

Insoluble

Cr

CO3

ii.

NaCl

%

  

iii.

H2SO4

Color

SO2

K#

Fe

Insoluble

Oxidizable

iv.

CH3OH

Color

    

Not turbid

      

v.

SO2

Moisture

  

Residue

      

Acidity

vi.

Mill water

Fe

Ca

Mg

Zn

Al

TOC
 

14

Source of NaClO3 dissolving water

Process water

hot water tank

Other

15

Dissolving water filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow

16

NaClO3 solution filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow

17

NaClO3 feed filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow

18

H2SO4unloading filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow

19

H2SO4 feed filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow

20

CH3OH filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow

21

CH3OH dilution water

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow

22

SO2 filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow

23

Source of hot water

Hot water tank

Process water

 

24

Hot flush water filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow

25

Mill flush water filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure

Low flow
 

26

%SO2 in air

      
 

27

Generator

Primary target

Deviation

Secondary target

Deviation

i.

Chlorate gpl/Molarity

        

ii.

Acidity gpl/Normality

        

iii.

Cl02 gpl

        

iv.

Temperature liquid

oF oC

oF oC

oF oC

oF oC

v.

TBP defoamer addition

Yes

No

vi.

Batch

25ml

50mls

75 mls

  

vii.

 

As needed

Once/shift

Twice/shift

Thrice/shift

viii.

Continuous

In CH3OH ppm

Pump mls /hr

Drip feed
 

28

ClO2 gas analyzer

Yes

No

29

%ClO2 in gas

%

  

%

  

ii.

Gas purity

%ClO2

  

%ClO2

  

30

Gas temperature

oF oC

oF oC

oF oC

oF oC
 
 

Absorption tower

Primary source

Back up Source

31

Absorption tower water

Chiller

Well

River

Process water

Fire water

i.

Water Temperature

Summer

oC

oF

Winter

oC

oF

ii.

ClO2 solution analyzer

Yes

No

iii.

ClO2 solution

Concentration gpl

Temperature

oC

oF

pH
 

32

ClO2 solution storage

Gallons

Hours
 

33

Tail gas scrubber

Scrubbing liquor

    

i.

  

White liquor

Caustic soda

Water

ii.

Gas scrubber vent connected to bleach plant scrubber

Y

N
 

34

Any other comments?
   
   

 

 

CHLORINE DIOXIDE GENERATOR QUESTIONNAIRE

Mill

Code

Contact

Telephone

Fax

Generator type

R8

R10

SVP-Lite

SVP-HP

SVP

Lurgi/Chemetic

1

Generator design rate

Metric Tonnes/day

Tons/day

2

Operating rates for

a. Softwood

b. Hardwood

3

Generator rate changes

Per day

Per week

Per month
 

4

Decompositions "Puffs"

Per day

Per week

Per month

Per year

5

Locations of "Puffs"

Generator

Filter

After ICC

Absorber
   

Storage tank

Dump tank

Other

  

6

High pressure Kick outs

Per day

Per week

Per month

Per year

7

Standby operation

Per day

Per week

Per month

Per year

8

White outs

Per day

Per week

Per month

Per year

9

Boil out every

        

10

Maintenance shut down

Per day

Per week

Per month

Per year

11

Maintenance on

Circ’n pump

Reboiler

Generator

Filter
 

Maintenance on

Absorbers

Scrubber

Ejector

Other pumps

Maintenance on

Exhaust fans

Other

 

Maintenance on

Level instruments

Pressure instruments

Analyzer instruments

Other instruments
 

12

Chemical yield

lb/lbClO2 kg/kgClO2

i.

NaClO3

    

ii.

CH3OH

    

iii.

H2O2

    

iv.

H2SO4

   
 

13

Steam to ClO2 ratio

14

Feed specification

i.

NaClO3

Turbidity

Fe

Ca

Mg

Insoluble

Cr

CO3

ii.

H2SO4

Color

SO2

Oxidizable

Fe

Insoluble

K#

  

iii.

CH3OH

Color

Not turbid

          

iv.

Mill water

Fe

Ca

Mg

Zn

Al

TOC
 

15

Source of NaClO3 dissolving water

Process water

Mill hot water tank

Other

16

Dissolving water filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow

17

NaClO3 solution filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow

18

NaClO3 feed filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow

19

H2SO4 unloading filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow

20

H2SO4 feed filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow

21

H2SO4dilution/flush water

Y

N

source

Mill water

hot water

Chilled water

ii.

Change out frequency

days

week

  

Low flow

22

H2SO4 water filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow

23

CH3OH filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow

 

24

CH3OH dilution water filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow

25

Process water filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow

26

Source of hot water

Hot water Tank

Process water

Other

27

Hot water filter

Y

N

micron size

10

20

30

40

ii.

Change out frequency

days

week

High pressure drop

Low flow
 

28

Emergency water

Primary source

Back-up source

i.

  

Process water

Fire water

Municipal
 

29

Generator analysis

Target

Deviation

Target

Deviation

i.

Chlorate gpl/Molarity

        

ii.

Acidity gpl/Normality

        

iii.

Cl02 gpl

Frequency

  

iv.

% solids

    
 

30

TBP defoamer added

Y

N

  

i.

Batch

25ml

50ml

75 mls

  

ii.

  

As needed

once/shift

twice/shift

thrice/shift

iii.

Continuous

In CH3OH ppm

Pump mls/hr

Drip feed
 

31

Salt cake filter

    

i.

% NaClO3 in cake

  

Frequency of test

ii.

NaClO3 in sesqui sol’n

gpl

Frequency of test
 

32

Temperature after ICC

Summer

Winter
   

oC

oF

oC

oF
   

33

Absorption tower water

Primary source

Back-up source

i.

  

Chiller

Well

River

Process water

Fire water

ii.

Water temperature

Summer

oF

oC

Winter

oC

oF

iii.

ClO2 solution

Concentration

Temperature

oC

oF

pH
 

34

ClO2 solution storage

Gallons

Hours
 

35

Tail gas scrubber

Scrubbing liquor

  

i.

  

White liquor

Caustic soda

Water

ii.

Vent connected to bleach plant scrubber

Y

N
 

36

Any other comments?