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In boiler systems, that environment includes hot water with a low pH or slightly acid condition and some degree of oxygen entrainment. Those conditions are ideal for corrosive action. Removal of carbon dioxide and oxygen from boiler feedwater is essential to preventing boiler-system corrosion.
Page 1/4 Safety Data Sheet Printed 5/28/15 Revised 5/12/15 . Stamford 6790 B.F.W.T. Boiler Feed Water Treatment . 1. IDENTIFICATION OF SUBSTANCE . Trade name:
Dissolved oxygen in feedwater will cause serious corrosion damage in a boiler by attaching to the walls of metal piping and other equipment and forming oxides (like rust). Dissolved carbon dioxide combines with water to form carbonic acid that may cause further corrosion.
Boiler Feed Pumps & Surge Tanks Achieve substantial energy savings and operating efficiency by raising the temperature of the boiler feedwater. Prevent thermal shock to a boiler or to a deaerator (if surge tank) by raising the temperature of the feed water. Prevent today's smaller, modern boilers from running dry.
Pre-heating the feed water to achieve an ideal boiler feed water temperature will allow the boiler to run most efficiently as the heat input required to raise the temperature of the water up is reduced. The difference between 140°F and 180°F in boiler feed water temperature equates to about a 3-4% difference in boiler efficiency.
Characteristics of boiler feed water. Water absorbs more heat for a given temperature rise than any other common inorganic substance. It expands 1600 times as it evaporates to form steam at atmospheric pressure. The steam is capable of carrying large quantities of heat.
only a small quantity of steam must be vented, because most of the steam used to scrub the water is condensed and becomes a part of the deaerated water In order to deaerate the boiler feedwater, water is sprayed into a steam atmosphere. This heats the water to within a few degrees of the temperature of the saturated steam.
Controlling the pH levels and conductivity of the feed water in your boiler will help you reduce the possibility of boiler water carryover into your steam system, eliminate the possibility of overfeeding chemicals, reduce the amount of time that you spend testing the system, and eliminate the need to regularly remove highly conductive water, which causes you to waste chemicals, water, and energy.
Boiler feed water A boiler is a device for generating steam, which consists of two principal parts: the furnace, which provides heat, usually by burning a fuel, and the boiler proper, a device in which the heat changes water into steam.
Typically a boiler feed pump is required to transfer feed water in a range of 200-230 F from a deaerator or boiler feed system to a boiler operating at pressures 15-300 psig depending on the boiler specifics.
Boiler feed water pumps are commonly centrifugal pumps. To ensure a high enough head and pressure, Boiler feed Pumps have been arranged in series (multistage pumps). A feedwater pump is most often driven by an electric motor for energy efficiency. Often two steam turbine-driven (turbo pump) and two electric feedwater pumps are used.