Water Treatment Chemicals (R.O., Boiler and Cooling Tower)
Water is the universal solvent and is invariably used for a wide variety of domestic and industrial purposes. The major industrial uses of water are steam generation, cooling, washing, and conveying of materials etc., Above all, it is the major raw material which will become an ingredient in the finished product. Of the many uses of water, steam production is considered as the most important as it is a means of power generation and of several industrial uses. Steam is used to drive turbines and for heating, and to operate pumps, compressors and reciprocating engines. Most chemical process industries require an uninterrupted supply of steam to be used for varied purposes. Water and its impurities are responsible for the corrosion of metals and formation of deposits on heat-transfer surfaces, which in turn reduce efficiency and waste energy. Having seen the effects of corrosion and deposits, let us see how this can be prevented. The path to their prevention can best be approached through understanding their basic causes, why and how they occur. Traditional processes for water treatment will thus consist of a coagulating process including a separation step in the form of flotation and precipitation and sedimentation including a filtering step, and in addition a step of water treatment for corrosion control purposes. Such traditional processes are, however, comprehensive and expensive with respect to processing of lime to so as achieve supply of the lime without leading to operation problems. The addition of lime usually takes place by dosage from a raw material container in the form of a lime silo via a worm conveyor to a slurry tank to dissolve the lime in water, and is then subjected to a post- treatment step in a lime water processing unit, prior to supply to the crude water to be treated.