Water is one of the major and most affordable universal solvents
in the world. It is abundantly available worldwide and has high heat capacity.
This makes it an ideal medium for heat exchange in cooling and filtration
systems. Water consists of dissolved salts and minerals such as salts and
oxides of calcium, magnesium, silica, carbonates, and chlorides. It also
contains biological impurities such as bacteria, which gets precipitated and
sticks to the walls of the water cooling equipment surfaces when encountered
with heat. Heat exchange is one of the major functions of water cooling
equipments. Precipitation of dissolved salts in water takes place due to the
heat exchange. The precipitated minerals can cause damage (corrosion, clogging
and fouling) to cooling system equipment. As water get concentrated in cooling
systems it dissolves ions which may exceed the solubility of some minerals and
results in scale formation in pipes, dissolved oxygen and other nutrients in
water also encourage bacterial growth that can foul system surfaces and also
causes diseases if not treated. Corrosion, scaling, and fouling are the major
problems encountered in cooling water systems. These require proper treatment
and control methods to maintain the value of the process it serves. Chemical
treatment of cooling water is an integral part of many industrial processes. It
is considered an important preventive maintenance. Corrosion, scaling and
fouling of water cooling equipment can be effectively controlled through the
chemical treatment.
Major
chemicals used to treat cooling water fall under polyphosphates, chromates,
nitrites, surfactants, zeolites, orthophosphates, PH regulators, biocides, and
bio dispersants categories. These chemicals are injected into water cooling
systems in specified doses to prevent scaling, corrosion, and growth of
bacteria in water. Thus, these protect the equipment from degradation. Many
industries such as power, food & beverage, steel, mining & metallurgy,
oil & gas, refinery & petrochemicals, textiles & dyes and, food
& beverage employ cooling water treatment chemicals. Based on chemical
type, the cooling water treatment chemicals can be segmented into steel and
copper based corrosion inhibitors, organic and inorganic phosphates based
scaling inhibitors, oxidizing biocides, non-oxidizing biocides, bio-dispersants
and others.
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Corrosion
and scaling accounts for major losses in cooling water systems. Various
specialty chemicals are used as corrosion and scaling inhibitors. These include
sodium hexa metaphosphate (SHMP), sodium tri polyphosphate (STPP), dilute
phosphoric acid, monoammonium phosphate, diammonium phosphate, monopotassium
phosphate, amino tri methylene phosphonate and ethylene diphosphonic acid.
Biocides can be divided into non-oxidizing biocides (such as bronopol and
isothiazoline) and oxidizing biocides such as (calcium hypochlorite, sodium
hypochlorite, stabilized bromine, hypobromus acid, sodium bromide, and chlorine
dioxide tablets).
Scale
inhibitor chemicals, corrosion inhibitor chemicals, and biocides accounts for
around 96% share of the global cooling
water treatment chemicals market, of this, scale inhibitor and
corrosion inhibitor chemicals holds more than 43% share. The cooling water
chemical treatment market is expanding primarily due to the introduction
of stringent regulations on water conservation and wastewater
management in industrial processes, legislations on water treatment
methods, and alignment of water quality standards with the European
Union (EU) directives.
Asia-Pacific
is rapidly growing region of the cooling water treatment chemicals market.
China, India, Thailand and Indonesia are potentially highly lucrative markets
for cooling water treatment chemicals in the region. The outlook for the
cooling water treatment chemicals market in Russia and Spain in Europe and the
UAE in the Middle East also appears positive. Government norms are pushing the
reduction of wastewater discharge and the need for fresh water for sustainable
industrial development.
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BASF SE,
Dow Chemical, Akzo Nobel, Ecolab Inc., GE Water and Process Technologies and
Kemira OYJ are the major players operating in the cooling water treatment
chemicals market. Dow Chemicals and Akzo Nobel are the key suppliers of cooling
water treatment chemicals. These companies account for prominent share of the
cooling water treatment chemicals market. Demand for cooling water treatment
chemicals is anticipated to increase across the globe due to the rapid
industrialization & urbanization, strict water conservation norms, and need
for more efficient industrial water treatment for safe disposal.
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