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Cooling Tower and Boiler

WATER TREATMENT COOLING TOWERS & BOILERS: All natural waters contain varying amounts of suspended and dissolved matter as well as dissolved gases. The type and amount of impurities in fresh water vary with the source (lake, river, and well) and with the area of location. Impurities in water become an important consideration when water is to be used for steam generation. With the trend toward higher-pressure boilers, pretreatment has become the key to successful operation of industrial power plants. Feedwater must be pretreated to remove impurities to control deposition, carryover, and corrosion in the boiler system. Poor quality water gives poor quality steam.

REDUCE DOWNTIME
SAVE ON COSTLY MEMBRANE CLEANING AND REPLACEMENT
SIGNIFICANTLY IMPROVE SYSTEM PERFORMANCE REDUCING INITIAL SYSTEM CAPITAL INVESTMENT
HIGH DISINFECTION RATE ACHIEVED
NO LEACHING OF CHEMICALS
SUBSTANTIAL WHOLE OF LIFE COST SAVINGS
Water-filtration systems in cooling towers increase the effectiveness of chemical treatment, which reduces chemical usage. Filtration also reduces the need for frequent tower cleaning and blowdown, and increases heat transfer efficiency. Iron and Manganese buildup in these systems significantly affect their performance.

Water evaporating in the boiler causes impurities to concentrate. Boiler scale results from suspended matter settling out on the metal or dissolved impurities precipitating out on heat transfer surfaces and becoming hard and adherent. Iron deposits are very dark coloured and are due to corrosion products or iron contamination in feedwater. Iron deposits are usually magnetic in nature. They are soluble in hot acid, giving a dark-brown solution.

The major problem that deposits cause is tube failure from overheating. This is due to the fact that the deposits act as an insulator and excessive deposits prevent efficient heat transfer through the tubes to the water. This causes the metal to become overheated and over time the metal fails. These deposits can also cause plugging or partial obstruction of boiler tubes, leading to starvation and subsequent overheating of the tubes. Underneath the deposit layer corrosion may also occur. Deposits cause unscheduled outages, increased cleaning time and expenses. Boiler deposits reduce overall operating efficiency resulting in higher fuel consumption.