Dan L Peterson

US Patent:

55759238, Nov 19, 1996

Filed:

Jun 7, 1995

Appl. No.:

8/485347

Inventors:

Robert L. Solomon - Seattle WA
Ferris C. Standiford - Bellevue WA
Joseph Bostjancic - Renton WA
Dan Peterson - Renton WA
George R. Jones - Renton WA

Assignee:

Ionics, Incorporated - Watertown MA

International Classification:

C02F 104
B01D 2994
B01D 2984

US Classification:

210714

Abstract:

An improved salt basket for dewatering solids, particularly salts resulting from evaporation of industrial wastewaters. The salt basket system includes a pressurizable vessel having a screen floor situated above a bottom liquid collection head, an inlet for the brine/solids slurry from which solids are to be separated and dried, an inlet for air, an inlet for steam (the latter two inlets may be combined, where convenient), an inlet for solids free feed, and a drain outlet (these two may be combined where convenient into a combination feed/drain connection). Preferably, an automated system for introducing feed brine and for removing the solids product is provided. For safety, a pivotally attached lower door has a hydraulic failsafe closure mechanism and locking safety latches to prevent the door from inadvertently opening. The process control design minimizes exposure of the salt basket interior to supersaturated solutions with precipitating solids therein, thus reducing scaling of the salt basket, by introducing feed brine rather than magma (crystal/concentrated liquor slurry) to the salt basket between crystal harvest cycles.

US Patent:

56561610, Aug 12, 1997

Filed:

Jun 7, 1995

Appl. No.:

8/473093

Inventors:

Robert L. Solomon - Seattle WA
Ferris C. Standiford - Bellevue WA
Joseph Bostjancic - Renton WA
Dan Peterson - Renton WA
George R. Jones - Renton WA

Assignee:

Ionics, Incorporated - Watertown MA

International Classification:

B01D 2970
B01D 2984
B01D 2996
B01D 3531

US Classification:

210232

Abstract:

An improved salt basket for dewatering solids, particularly salts resulting from evaporation of industrial wastewaters. The salt basket system includes a pressurizable vessel having a screen floor situated above a bottom liquid collection head, an inlet for the brine/solids slurry from which solids are to be separated and dried, an inlet for air, an inlet for steam (the latter two inlets may be combined, where convenient), an inlet for solids free feed, and a drain outlet (these two may be combined where convenient into a combination feed/drain connection). Preferably, an automated system for introducing feed brine and for removing the solids product is provided. For safety, a pivotally attached lower door has a hydraulic failsafe closure mechanism and locking safety latches to prevent the door from inadvertently opening. The process control design minimizes exposure of the salt basket interior to supersaturated solutions with precipitating solids therein, thus reducing scaling of the salt basket, by introducing feed brine rather than magma (crystal/concentrated liquor slurry) to the salt basket between crystal harvest cycles.

US Patent:

54726220, Dec 5, 1995

Filed:

Apr 20, 1993

Appl. No.:

8/051035

Inventors:

Robert L. Solomon - Seattle WA
Ferris C. Standiford - Bellevue WA
Joseph Bostjancic - Renton WA
Dan Peterson - Renton WA
George R. Jones - Renton WA

Assignee:

Ionics, Incorporated - Watertown MA

International Classification:

C02F 104

US Classification:

210767

Abstract:

An improved salt basket for dewatering solids, particularly salts resulting from evaporation of industrial wastewaters. The salt basket system includes a pressurizable vessel having a screen floor situated above a bottom liquid collection head, an inlet for the brine/solids slurry from which solids are to be separated and dried, an inlet for air, an inlet for steam (the latter two inlets may be combined, where convenient), an inlet for solids free feed, and a drain outlet (these two may be combined where convenient into a combination feed/drain connection). Preferably, an automated system for introducing feed brine and for removing the solids product is provided. For safety, a pivotally attached lower door has a hydraulic failsafe closure mechanism and locking safety latches to prevent the door from inadvertently opening. The process control design minimizes exposure of the salt basket interior to supersaturated solutions with precipitating solids therein, thus reducing scaling of the salt basket, by introducing feed brine rather than magma (crystal/concentrated liquor slurry) to the salt basket between crystal harvest cycles.

Author:

Dan Peterson

ISBN #:

0757521533

Author:

Dan Peterson

ISBN #:

0781913519