Claims
- 1. A screening plant for treating pulp in a pulp mill, having means for pumping, treating and thickening, said screening plant comprising:
- (a) a pump, receiving pulp and exhausting the pulp at an increased pressure;
- (b) a treatment apparatus consisting of at least one of a cleaner and a screen, receiving pulp pressurized by said pump; and
- (c) a first thickener, receiving pulp pressurized by said pump and increasing a solids content of a portion thereof,
- wherein said pump, said treatment apparatus and said thickener are interconnected in closed hydraulic communication and structured so that no air enters into the pulp.
- 2. The screening plant according to claim 1, further comprising a fiberizer/refiner downstream of said thickener, receiving pulp pressurized by said pump, wherein said fiberizer is in closed pressurized hydraulic communication with said thickener and structured so that no air enters into the pulp, the pulp being passed from said thickener to said fiberizer.
- 3. The screening plant according to claim, 1, wherein:
- said pump exhausts said pulp at an increased pressure;
- said treatment apparatus receives the pulp pressurized by said pump and produces treated pulp; and
- said first thickener receives treated pulp from said treatment apparatus and pressurized by said pump.
- 4. The screening plant according to claim 1, further comprising a second thickener receiving pulp pressurized by said pump and increasing a solids content of a portion thereof, said first and second thickeners operating in series, wherein said first thickener is in closed pressurized hydraulic communication with said second thickener and structured so that no air enters into the pulp, the pulp being passed from said first thickener to said second thickener.
Priority Claims (1)
Number |
Date |
Country |
Kind |
891484 |
Mar 1989 |
FIX |
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CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation-in-part of U.S. patent application Ser. No. 500,475, filed Mar. 28, 1990.
US Referenced Citations (6)
Non-Patent Literature Citations (2)
Entry |
"Chesapeake--The West Point Pulp and Paper Mill" (Brochure 1986). |
"Ahlstrom Fiber Flow Ensovac" (Brochure 1987). |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
500475 |
Mar 1990 |
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