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COOLING WATER SLIME & ALGAE
CONTROL |
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COOLING WATER MAINTENANCE
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MAJOR PROBLEM IN COOLING TOWER maintenance is
ALGAE (Green organic) MICROBIAL Activity and SLIME (Pastry Organic
Material) Deposit in Heat transfer surface of Heat exchanger called
“FOULING". This interferes with heat transfer operation of
cooling cycle which reduces the efficiency of Heat transfer thereby
resulting in direct / indirect commercial loss.
In addition, bacterial Metabolism influences the scale forming or
it produces corrosive spots resulting in corrosion of metal on water side
of Heat Exchanger |
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CONTROL OF SLIME & ALGAE |
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 SHOCK
DOSING of 5 ppm of chlorine for the volume of water in COOLING CIRCUIT for
a short period of about 10 Minutes maximum or sudden dumping of chlorine
in one minute in the C.T. hold up tank, will effectively control Algae
fouling. SHOCK dosing is to
be done once in a shift (i.e. 3 times a day).
PRIMETECH
is providing
solution to the problem faced by OEM Manufacturers of Cooling Towers and
Refrigeration System Owners through its innovative, pattern pending
On-site Chlorine Generating System called `CHLORIDOSE’. This system enables the plant operator to generate chlorine
in the form of Sodium Hypochlorite with least attention requirement for
operation and maintenance of the unit. The chlorine is generated from
common salt, water and power. The
chlorine generated can be manually transferred to C.T. basin for effective
algae and slime control. The solution generated is a best low cost biocide
produced in-house which can be used effectively instead of branded costly
biocides available in the market. |
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COOLING TOWER SYSTEM– PROBLEMS & REMEDIES IN COOLING WATER |
Problems encountered on water side
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Treatment
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Microbial fouling. (Slime & Algae)
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Chlorine Shock Dosing
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Scale formation on Heat transfer tubes
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Water Softening
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Corrosion of metals in the system
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Addition of Inhibitors
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Fouling from dirt and silt accumulation
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Filtration
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MODEL SELECTION CHART |
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Hold up Volume of in Cooling tower litre.
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Chlorine for
shock dose @ 5ppm gms/dose |
No. of Shock dose/day
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Chlorine
Required Gms |
Chloridose
day/shift |
Chloridose
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Consumable
Required
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Model
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gm/day
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Common Salt (Kg)
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Up to 5,000
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25 |
3
|
75 |
10 lits/day |
CHL-A
|
100
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0.5
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|
10,000
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50 |
3 |
150 |
20 lits/day |
CHL-B
|
200
|
1.0
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25,000
|
125 |
3 |
375 |
50 |
16.7 |
CHL-C
|
500
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2.5
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50,000
|
250 |
3 |
750 |
100 |
33.3 |
CHL-D
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1,000
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5.0
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1,00,000
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500 |
3 |
1500 |
200 |
66.6 |
CHL-E
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2,000
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10.0
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2,00,000
|
1000 |
3 |
3000 |
400 |
133.3 |
CHL-F
|
4,000
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20.0
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4,00,000
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2000 |
3 |
6000 |
800 |
266.7 |
CHL-G
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8,000
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40.0
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TYPICAL COST OF OPERATION |
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5,000 litres of water capacity Cooling
tower consumes 0.5 Kg. salt & 0.75 KW power per day for daily
maintenance. |
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