(PDF) Prediction of silica carry-over and solubility in ...
As pressures increase above 2760 kPa (400 psi) there is an increased tendency for silica to be selectively carried into the steam in amounts proportional to the amount of silica in the boiler water.In oil industry the production of extra-heavy oil or bitumen using the steam-assisted gravity-drainage (SAGD) method entails the generation and injection of a large quantity of the reserv
Guide to Managing the Condensate for Condensing Water Heaters.
The condensing process is achieved by passing the piped hot flue gases through the cooler return water flowing back into the boiler. Flue gas starts to condense when it drops below its dew point of 55°C. This is why condensing are designed to accommodate a return temperature of 54°C or less.
Water Handbook - Preboiler & Industrial Boiler Corrosion ...
Porous metal oxide deposits also permit the development of high boiler water concentrations. Water flows into the deposit and heat applied to the tube causes the water to evaporate leaving a very concentrated solution. Again corrosion may occur. ... where it can react with iron carbides to methane or with other hydrogen atoms to ...
The Importance of Boiler Water and Steam Chemistry
For most dissolved solids found in boiler water it is negligible by comparison to mechanical carryover at pressures less than 2000 psig (13.8 MPa). An exception is silica for which vaporous carryover can be substantial at lower pressures. Vaporous carryover depends on pressure and on chemistry. It is not affected by design.
Silica Scaling in Boilers - Water Treatment and Purification
Silica is the only boiler watersalt which vaporizes at pressures below 2400 psig. It can vaporize at pressures as low as 400 psig. This has caused deposition problems in numerous turbines. The solubility of silica in steam increases with increased temperature: silica becomes more soluble as steam is