The alkalinity of boiler water should be sufficiently high enough to protect shell and plates against acidic corrosion, but not high enough to produce carryover. A minimum value for alkalinity for adequate protection is 200 PPM. High boiler alkalinity, which is in excess of 700 PPM, should be avoided. Values higher than this can lead to embrittlement of the steel. Phosphates. Phosphates are used to react with calcium hardness in the boiler water. …
Well water can have as high as 1,250 ppm of dissolved solids. 1,000,000 pounds of this water will have 1,250 pounds of solids. A 100 hp boiler vaporizing 3,450 pounds of this as make-up water could leave 4.3 pounds of solids behind. 3.5.4 Suspended solids are insoluble …
Jan 07, 1983 · The chemical methods of attaining the desirable conditions in the water side of boilers operating above 5.9 MN/m3 (60 kgf/cm2) are given in IS : 4343-1983*.
2.9.4 Treated Water Limits 2.10 Test Kit 2.11 STEAM BOILER WATER TREATMENT 2.11.1 Boiler Water Limits 2.11.2 Water Softening System 2.11.3 Boiler Water Treatment System 2.11.4 Steam Boiler Chemical Feed Pumps and Tanks 2.11.5 Steam Boiler Chemical Injection Assemblies 2.11.6 Steam Boiler Water Meter 2.11.7 Steam Boiler Timers
Characteristics of boiler feedwater - Lenntech
Boiler Water Quality. Boiler Chemicals are used to ensure proper Boiler Water Quality in boilers. The below table is the Total Dissolved Solids or TDS, Alkalinity, and Hardness versus Boiler Pressure. First, knowing the water source is important, whether it is from ponds, rivers, ground wells, or city water. It is essential in determining the type of boiler water treatment chemicals needed.
IS 10496 (1983): Feed Water, Boiler Water and Condensate for High
temperature is held above 190° F there is a potential for feed water pump cavitation. – Temperature gauges fail, so holding the tank at 200ºF. – When the feed water pump comes on, the boiling point of water is reduced – Deareators use head pressure (1 psi for every 2.3 feet of height above the pump), where a feed water tank is barely 3 feet above the feed water pumps.