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Water Treatment Seminar

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Title: Water Treatment Seminar Last modified by: Mark Swan Created Date: 7/22/1998 12:45:38 PM Document presentation format: On-screen Show (4:3) Other titles – PowerPoint PPT presentation

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Title: Water Treatment Seminar


1
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2
Investment vs Operating cost
  • The average 800,000 ft² Property has
    24,000,000.00 replaceable physical plant. The
    cost of water treatment is 0.02 - 0.04/ ft² to
    protect this investment.
  • The industrial market costs are higher. A
    200,000 square foot plant may have roughly
    100,000,000 in replaceable physical plant.
    Water treatment cost may be in the vicinity of
    0.10-0.20 / ft²
  • The owner loses 6 million per year (at 6 cost
    of money) for every year of lost life as a result
    of poor water treatment.

3
Who is in charge of your Investment ???
  • The Treatment Supplier tells you what your
    problems are.
  • Then they tell you what chemicals to use.
  • Then they tell you how much they will cost.
  • Then they tell you when it is working.
  • You know when its not working when something
    fails.

4
Why treat the water?
  • Corrosion
  • Scaling
  • Deposition
  • Microbiological

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8
Economics
  • General cooling economics
  • Effect of scale, deposits, and Bio on efficiency
    and heat transfer

9
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10
POTENTIAL LOSSES
  • Biofouled Condenser Tubes 10
  • Scaled Condenser Tubes 15
  • Scaled Boiler Tubes 8-16
  • Equipment Losses - millions
  • Piping Losses - millions
  • Downtime - priceless

11
What you are Buying?
  • Service (70 cost of your program)
  • Chemicals (Only 20-30 Cost of program)
  • Intent

12
What you should Expect.
  • Service Defined
  • Visits
  • Testing
  • Recordkeeping
  • Inspections
  • Qualifications
  • Additional Services

13
Cooling Water Technology
  • Corrosion Control
  • Biological Control.
  • Deposition Control.
  • Scale Control.
  • Industry Performance Standards.

14
CORROSION CONTROL
15
Tower Corrosion Inhibitors
  • Mild Steel
  • Phosphates
  • Phosphonates
  • Polyphosphates
  • Ortho-phosphates
  • Molybdenum
  • Zinc
  • Silicates
  • Others
  • Blends
  • Copper
  • Tolytriazole
  • BT
  • MBT
  • HRA
  • Others?

16
Closed Loop Corrosion Inhibitors
  • Mild Steel
  • Molybdenum
  • Nitrite
  • Silicates
  • Others
  • Blends
  • Copper
  • Tolytriazole

17
Corrosion Control.
  • Corrosion Rates
  • Less than 1.0 mils/yr for steel and less than 0.1
    mils/yr. for copper.
  • Less than 0.5 mils/yr. for steel and less than
    0.1 mils/yr. for copper.

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19
DEPOSITION CONTROL
20
Deposition Control.
  • What is deposition.
  • Control with cycles.
  • Control with polymeric dispersants.
  • Polyacrylates
  • Sulfonated Copolymers.
  • Copolymers
  • Terpolymers
  • Quad Polymers
  • Filtration

21
Microbiological Control
22
Microbiological Control
  • Aerobic Bacteria
  • slime
  • Anaerobic Bacteria
  • SRB, IRB
  • Algae
  • Legionella Bacteria
  • 7 different sero groups
  • Dual Alternating Biocide Program

23
Types of Biocides
  • Oxidizing
  • Chlorine
  • Sodium Hypochlorite
  • Bromine
  • Liquid Bromine
  • Sodium Bromide
  • Bromine/Chlorine Donors (solids)
  • Hydantoin, Others
  • Ozone, chlorine dioxide, chlorine gas
  • Non-oxidizing
  • Glutaraldehyde
  • Isothiazolone
  • DBNPA
  • Ethylene Chloride
  • Carbamates
  • Quaternary Ammonium Compounds

24
Field Testing
25
Bacteria Performance
  • Aerobic Bacteria should at or less than 10,000
    cells/ml in open condenser water systems
  • Bacteria should be at or less than 1,000 cells/ml
    in closed loops.
  • Anaerobic Bacteria at or below 50 cells/ml

26
SCALE CONTROL
27
Scale Inhibitors and Control
  • REALLY DEPENDING ON THE HARDNESS ALKALINITY TO
    PROVIDE THE MILD STEEL CORROSION CONTROL.
  • YOU WORK ON DEPOSITON CONTROL.
  • Phosphonates
  • HEDP
  • PBTC
  • Carboxylic Acid

28
Industry Changes
  • Companies/People
  • Tubes
  • Environmental
  • Service Industry

29
ENHANCED TUBES
30
What you should know about enhanced tubes and
package units?
  • They need flow to be protected.
  • They need the correct biocide program.
  • They need adequate copper protection.
  • They need proper brushing.
  • They need to be inspected with proper equipment.
  • They need to be eddy current tested.

31
Underdeposit Corrosion
32
ENHANCED TUBE BRUSHES
33
Rat Race System
34
Cleaning
  • New Systems
  • Proper Cleaning
  • White Rust
  • Filters
  • First Year Chiller Maintenance
  • Eddy current
  • Corrosion
  • Inspections

35
White Rust
36
LSI
  • How many cycles can I run?
  • When will I deposit?
  • Example

37
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