Puresteam,
When you switch from lead to lag boiler is the steam pressure equalized on both boilers? Is the steam rate (capacity)the same on both boilers?
Why not run both boilers together in battery and run the lead boiler with more load and the lag boiler with minimu load?
A non-return valve...
GenB,
I didn't mean you would have a problem with conductivity,
it just that water chemistry/treatment is more critical at higher steam pressures and demineralizers are nessary.
CaptainKvar
Why not just use water softeners? Demineralizers are very expensive and wastewater licenses may be needed to regenerate them. At those Boiler(100-500psi) pressures DI water isn't neccessary. Usually 600psi and above DI water is needed particularly when using steam turbines where silica would be...