According to GB/T 1576-2008 regulations:
For steam boilers that use water treatment outside the pot, the hardness should be ≤0.030 mmol/L;
p>use water treatment inside the pot, the hardness should be less than or equal to 4.0 mmol/L.
Based on:
GB/T1576-2008 Water quality of industrial boilers
GBT 12145-2008 Water vapor quality of units thermal power generation and steam power generation equipment Condensate - condensate pump - shaft plus - bottom plus - degasser - feed water pump - top plus - economizer - drum of steam - descent - water wall - steam drum (steam and water separation) - Superheater (ceiling, sieve, low temperature, final stage superheater, etc.) - High pressure cylinder of steam turbine - Steam high pressure cylinder exhaust - Heater (screen heater, wall heater, final heater, etc.) - Cylmedium pressure indre of steam turbine - low pressure cylinder turbine - condenser - condensate water
This is the main process of boiler steam and water system