Salt basket for crystallizer and method of use in zero liquid discharge industrial facilities
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-029/70
B01D-029/84
B01D-029/96
B01D-035/31
출원번호
US-0473093
(1995-06-07)
발명자
/ 주소
Solomon Robert L. (Seattle WA) Standiford Ferris C. (Bellevue WA) Bostjancic Joseph (Renton WA) Peterson Dan (Renton WA) Jones George R. (Renton WA)
출원인 / 주소
Ionics, Incorporated (Watertown MA 02)
인용정보
피인용 횟수 :
13인용 특허 :
0
초록▼
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
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.
대표청구항▼
An improved salt basket for separation of solid crystals from a slurry containing a concentrated liquid and solid crystals, said improved salt basket comprising: (a) an upper vessel, said upper vessel comprising (i) a downwardly and outwardly sloping sidewall, said sidewall having a lower end portio
An improved salt basket for separation of solid crystals from a slurry containing a concentrated liquid and solid crystals, said improved salt basket comprising: (a) an upper vessel, said upper vessel comprising (i) a downwardly and outwardly sloping sidewall, said sidewall having a lower end portion, said lower end portion defining a downward directed bottom opening; and (ii) an upper flange, said upper flange extending peripherally outward from said lower end portion of said sidewall, (b) a door, said door sized and displaceably located for opening and closing of said downward directed bottom opening of said upper vessel, said door attached by a pivot connection to the lower reaches of said upper vessel, said pivot connection includes an automatic cyclic programmable control sequence for repetitive downward-outward opening movement followed by inward-upward closing movement, which, respectively, effects the opening and the closing of said downward directed bottom opening in said upper vessel for batchwise harvest of said solid crystals, said door further comprising (i) an outer edge portion, said outer edge portion sized substantially complementary to said lower end portion of said sidewall of said upper vessel, said outer edge portion further comprising a a door flange extending peripherally outward therefrom, said door flange and said upper flange on said upper vessel being juxtaposed in a mating and sealing relationship, so as to pressurizeably seal said downward directed bottom opening of said upper vessel; and (ii) an upper portion, said upper portion having an interior flange; and (iii) a drain, said drain adapted to allow discharge of said concentrated liquid therethrough; (c) a screen, said screen affixed to said interior flange of said upper portion of said door, said screen shaped to define apertures therein, said apertures adapted for allowing escape of said concentrated liquid therethrough while substantially preventing said solid crystals from escaping therethrough.
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