Loading patent…
AssigneeNalco Chemical Company
InventorsClaudia C. Pierce, Roger W. Fowee, John E. Hoots
Estimating the term…
Concentration cycles, percent life holding time for a component in the boiler and continuous treatment concentrations are monitored or determined in a boiler system by adding to the feedwater an inert tracer in a predetermined concentration C.sub.I, which reaches a final concentration C.sub.F at steady state in the boiler and which exhibits a blowdown concentration C.sub.t at different points in time. The component is an inert tracer having no significant carryover in the steam, nor significant degradation during boiler cycles. The tracer is monitored by continuously converting a characteristic of its concentration to an analog which may be recorded as a function of time.
A method of determining blowdown:feedwater concentration cycles in a boiler water system where steam is generated in a boiler from fresh feedwater fed thereto, and wherein the concentration of impurities in the boiler water is reduced by withdrawing boiler water as blowdown while admitting additional feedwater as makeup, said concentration cycles being the value of the concentration (C.sub.F) of a component in the blowdown at steady state divided by the concentration (C.sub.I) of that component in the feedwater, said component likewise having no appreciable carryover into the steam, said method comprising the steps of:
In a boiler system where a boiler charged with feedwater generates steam therefrom, wherein metal ions detrimental to boiler efficiency are present in the feedwater as impurities and wherein a treating agent in a predetermined concentration is added to the feedwater having the role of removing or neutralizing said impurities, a method of correcting the dosage of treating agent if there is a variance from the amount deemed optimum for the role, including the steps of:
In a boiler system where a boiler charged with feedwater of mass M, which may be an unknown mass, generates steam therefrom at a particular temperature, wherein the concentration of impurities in the boiler water is reduced by withdrawing boiler water as blowdown at a particular rate B (mass per unit of time) which may also be an unknown, a method of determining the boiler constant K=M/.sub.B including the steps of:
A method of determining it there is mechanical carryover of water droplets into a body of steam generated in a water boiler charged with feedwater, comprising the steps of adding an inert tracer to the feedwater, taking a sample of steam condensate and analyzing the sample for tracer presence.
Dependencies are inferred from the claim text.