Patent ID: 8914142

Claim:
A method for optimization of a plurality of boiler parameters in a recovery boiler process, the method comprising: (i) providing a process model describing a relationship between process variables for one or more units of a recovery boiler system, wherein the one or more units of the recovery boiler system includes a char bed; (ii) estimating the plurality of boiler parameters of the one or more units of the recovery boiler system; (iii) using the plurality of boiler parameters to develop at least one objective function for optimization; and (iv) optimizing the at least one objective function for control of the plurality of boiler parameters of the recovery boiler system, wherein the estimating of the plurality of boiler parameters includes using the process model describing the relationship for estimation of at least one of sulfate concentration, sulfide concentration in a reduction reaction of the recovery boiler process, and using process variable data obtained from on-line measurements made in the units of the recovery boiler system, wherein the plurality of boiler parameters includes one or more parameters associated with the char bed of the recovery boiler system.