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 TDS of your boiler water can either be measured by taking a sample of the water and measuring it externally from the boiler or by placing a sensor inside that’s designed to detect TDS levels. Keep in mind that a high TDS level indicates high conductivity in the water.
Feed Water & Boiler water Characteristics as per IS:10392-1982 1.FEED WATER Parameters Upto 20 Kg/cm2 21 Kg/cm2 to 39 Kg/cm2 40 Kg/cm2 to 59 Kg/cm2 Unit Total Hardness <10 <1.0 <0.5 ppm as CaCO 3 pH Value 8.5-9.5 8.5-9.5 8.5-9.5 Dissolved Oxygen 0.1 0.02 0.01 As ppm Silica 5 0.5 As ppm SiO 2
In the by now obsolete German code ↑ TRD 611, the boiler operating mode used to be defined as either " high TDS ", " low TDS ", or " no TDS ", based upon the → electrical conductivity of the boiler feed water. These terms are still widely used within the field of → boiler feed water treatment.
Using Reverse Osmosis for Boiler Pretreatment By James McDonald, PE, CWT and Dave Christophersen, CWT Originally Published: Analyst, Summer 2003 T here are numerous makeup water pretreatment strategies for boiler systems including softeners, dealkalizers, demineralizers, and reverse osmosis. Factors such as makeup water characteristics, economics,
Related Documents. Total Dissolved Solids - TDS - In a boiler generating steam impurities from the feedwater will concentrate in the boiling water Boiler Blowdown - Suspended solids in the feed water will remain in the boiler when steam is generated Boiler Blowdown Rate - Calculating boiler blowdown rate Feed Water Treatment
Primary indicators of boiler water treatment are pH, TDS (Total Dissolved Solids), TSS (Total Suspended Solids) and hardness. Water pH A neutral level is pH = 7.
There are several causes for whilst foaming; high levels of suspended solids, high alkalinity or contamination by oils and fats but, the most common cause of carryover (provided these other factors are properly controlled) is a high Total Dissolved Solids (TDS) level. Careful control of boiler water’s TDS level, together with attention to these other factors should ensure that the risk of foaming and carryover are minimized.
Normally the TDS in the Boiler Feed Water (combination of Condensate returned from sugar plant and make up quantity from RO plant) will be in the range of 3 to 5 ppm, and to reach the limit of 500 ppm, you need 1250 Hrs of Boiler working at full load.
TDS = Total Dissolved Solids (ppm) ρ = relative density of the boiler water at 15.5 o C This is a manual method requiring measuring a cooled down sample with a very sensitive hydrometer.