Abstract: The amount or extent of expositions as a result of hot smelt from a pulp mill recovery boiler impacting cool liquid in a dissolving tank is reduced more effectively by regulating the smelt flow via a restrictor assembly. The restrictor assembly may be positioned to permit the smelt to flow, unrestricted, from the recovery boiler to the dissolving tank, or the restrictor assembly may be positioned so as to fully or partially block the smelt flow from the boiler to the dissolving tank. In some embodiments, a source of cooling fluid may be coupled to the restrictor assembly so as to assist in cooling parts of the restrictor assembly when hot smelt is in contact with the assembly.

Abstract: A method to disrupt a smelt flow including: arranging a shatter jet nozzle assembly to direct a jet of disrupting fluid against the smelt flowing from a recovery boiler to a dissolving tank; supplying the disrupting fluid to the shatter jet nozzle assembly from a first source of disrupting fluid to form the jet directed against the smelt flow while a second source does not provide disrupting fluid to the shatter jet nozzle, and supplying the disrupting fluid from both the first source and the second source flow to the shatter jet nozzle assembly to form the jet of disrupting fluid directed against the smelt flow.

Abstract: A method to disrupt a smelt flow including: arranging a shatter jet nozzle assembly to direct a jet of disrupting fluid against the smelt flowing from a recovery boiler to a dissolving tank; supplying the disrupting fluid to the shatter jet nozzle assembly from a first source of disrupting fluid to form the jet directed against the smelt flow while a second source does not provide disrupting fluid to the shatter jet nozzle, and supplying the disrupting fluid from both the first source and the second source flow to the shatter jet nozzle assembly to form the jet of disrupting fluid directed against the smelt flow.