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Power generation boilers use fuels
such as coal, oil or natural gas to hear water and therefore produce steam, which is in
turn used to drive turbine generators. The economics of power generation rely to a great
extent on the efficiency of the fuel to heat conversion process and therefore the power
generation industry are amongst the most advanced users of efficiency techniques based on
on-line process analysis.
Within the power station
the aim of water and steam control is to minimize contamination of circuit, thereby
reducing corrosion as well as cutting down the risk of the formation of harmful
impurities. Therefore it is very important to control the quality of water to prevent the
deposits on turbine blades by Silica (SiO2), reduce corrosion by dissolved oxygen (DO) or
to prevent acid corrosion by Hydrazine (N2H4). Measurement of water conductivity gives an
excellent initial indication of falling water quality, analysis of Chlorine (Cl2), Ozone
(O3) and Chloride (Cl) used for control of cooling water disinfecting, indication of
corrosion and detection of cooling water leaks in the condense stage. |
