Aug 24, 2016· Usually in the Steam Drum, the TDS (Total Dissolved Solids) will be more than other devices or equipment. because the water will be sent into Boiler waterwalls through downcomers and it will be rised in the 4 sides of waterwalls after that it used
Oct 13, 2018· Boiler scaling is a key question in industrial boiler maintenance and repair, because scaling not only threatens the safe operation of the boiler, but also greatly increases the cost of boiler maintenance or repair, and shortens the service life of the boiler. As for the scaling problem of the industrial boiler, EPCB Boiler deeply analyze 
Nov 14, 2013· For drum-type HRSGs as outlined in this article, the high temperatures and the concentrating effect caused by recirculation of the boiler water require close monitoring.
Many corrosion problems occur in the hottest areas of the boiler-the water wall, screen, and superheater tubes. Other common problem areas include deaerators, feedwater heaters, and economizers. Methods of corrosion control vary depending upon the type of corrosion encountered.
The concentration of impurities is often termed TDS - Total Dissolved Solids (ppm) and can be measured using a conductivity or density method. Measuring TDS with the density method. TDS = 1.1 10 6 (ρ - 1) (1) where. TDS = Total Dissolved Solids (ppm) ρ = relative density of the boiler
Properties and their effects. In case layers of scales keeps on building inside the boiler, the insulation layer will reduce, which in turn will prevent the heating of water and generation of steam.This will lead to overheating and damage to the internal parts of the boiler, reducing the overall efficiency.
Jun 22, 2009· June 23, 2009. A. Hi, Prasad. Apparently cation conductivity is not just a property, but a technique: "In high pressure steam systems, cation conductivity is a useful tool for monitoring return condensate for low levels of contamination by anions such as Cl-, SO4-, HCO3-, etc.
Oct 14, 2007· Ph And Phosphate Concentration In Bfw And Steam Drum - posted in Industrial Professionals: Boiler feed water (BFW) pH is to be maintained in the range of 8.0 to 9.5(guidelines) where as in steam drum pH maintaining guidelines is in the range of 9.5 to 11.0. Pressure of steam drum is 34 barg. Since dosing of PO4 (Trisodium phosphate is dosing in steam drum) cannot be a
Boiler Water Conductivity High Possible Causes: - Too low blow down - Condenser tube leakage - Poor DM make up water quality - Low pH of make up water Affect: - It can lead to scaling in the tubes if sustained over a period of time Corrective Action: - Increase blow down to maximum - Increase phosphate dosing to maintain pH - If condenser tube
Water quality, Demineralization, Water treatment . Introduction . A boiler is a closed vessel in which water under pressure is transformed into steam by the application of heat.
Jun 24, 2014· That oxygen comes out of solution as the water boils, and it can eat holes in the boiler, right at the boilers waterline. If you decide to feed with hot water instead of cold water, the minerals in the water will come out of solution on the automatic water-feeders seat, and that can cause a flood, especially if its a one-pipe-steam system.
Where organics come from. There are two primary sources of carbon-based molecules in a boiler or in the steam it produces: compounds that enter with makeup water and organic treatment chemicals.
Condensate contamination can be caused by heat exchanger leaks, boiler carryover, etc. and can be a perplexing problem. If approached logically, you will be able to find the source of the contamination. Consider the analogy of a tree with the boiler being the trunk
The soot and scale problems Page 5 NOTES Figure 2: Fire tube with soot inside and scale outside Figure 2 shows a fire tube with soot inside the tube. In a fire tube boiler the hot combustion gases pass through a bundle of tubes and release part of their energy to the water at the outside.
conductivity of ash deposits formed on heat exchange sur-faces of an oil shale boiler . The thermal conductivity of the hard deposits is about 1 W/(m K); that of weakly bound and loose deposits is usually below 0.2 W/(m K). The thermal conductivity of an iron-rich slag deposit, and weakly and hard-bound sulfate deposits an industrial
Scaling in boilers. Leading to local overheating. Scaling mechanism is the exceeding of the solubility limits of mineral substances due to elevated temperature and solids concentration at the tube/water interface. The deposition of crystalline precipitates on the walls of the boiler interferes with heat transfer and may cause hot spots,
Boiler feedwater heaters are designed to improve boiler efficiency by extracting heat from streams such as boiler water blowdown and turbine extraction or excess exhaust steam. Feedwater heaters are generally classified as low-pressure (ahead of the deaerator), high-pressure (after the deaerator), or deaerating heaters.
If you plan to use boiler conductivity to calculate cycles of concentration, feedwater demand, blowdown, and percent blowdown, your results will be wrong if you don't use neutralized conductivity. The cycle result will be too high, percent blow down too low, blowdown flowrate too.
Boiler is designed to generate high quality steam for plant use. Boiler absorb maximum amount of heat released in the process of combustion, which is transferred to the content of boiler (water) to generate steam. For better performance of the boiler, the water feed into boiler must be treated to remove foreign materials present in the water.