Ion exchange - Is by far the most widely used method of water treatment for shell boilers producing saturated steam. This module will concentrate on the following processes by which water is treated: Base exchange Dealkalisation and Demineralisation.
Boiler types Saturated steam taken from the boiler may contain entrained water droplets however a well designed boiler will supply virtually "dry" saturated steam with very little entrained water. Continued heating of the saturated steam will bring the steam to a "superheated" state where the steam is heated to a temperature above the saturation temperature Fire tube boiler The next stage ...
Mar 17 2015 · (Saturated Liquid) Steam Boiler and Blowdown Pressure are the same. Combustion Efficiency is the % of fuel energy that is directly added to the feedwater and not otherwise lost or used. Blowdown Rate is the % of incoming feedwater mass flow rate that leaves the boiler as a saturated liquid at boiler pressure.
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 boiler water chemistry. It is not affected by boiler design.
In a boiler energy from the fuel is transferred to liquid water in order to create steam. Once the water is heated to boiling point it is vaporized and turned into saturated steam. When saturated steam is heated above boiling point dry steam is created and all traces of
b = boiler water TDS concentration. m = make-up water TDS concentration. r = fractional condensate return. This ratio can be optimized by controlling the boiler make-up water (click in new page) quality and the reused boiler blowdown (click in new page) quality. Boiler water quality shall be set according to the boiler pressure and type of heater.