Hybrid multistage forward cleaner system with floation cell

a cleaner system and multi-stage technology, applied in reversed direction vortex, manufacturing tools, vortex flow apparatus, etc., can solve the problem of large amount of ink ending up in the pressate, and achieve the effect of increasing the overall efficiency of the system

Inactive Publication Date: 2002-01-31
GPCP IP HLDG LLC
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  • Claims
  • Application Information

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Benefits of technology

0010] The present invention provides a hybrid system for processing papermaking fibers and includes a multistage array of forward cleaners coupled with a flotation cell which increases overall efficiency of th

Problems solved by technology

When the centrifugal cleaner accepts are thickened in

Method used

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  • Hybrid multistage forward cleaner system with floation cell
  • Hybrid multistage forward cleaner system with floation cell
  • Hybrid multistage forward cleaner system with floation cell

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Embodiment Construction

[0039] Pilot plant trials showed that flotation cells such as the Comer Cybercel .RTM. can successfully deink secondary centrifugal cleaner rejects, with better results obtained if the consistency is kept close to 0.6%. Consistency refers to weight percent fiber or associated solids such as ash unless the context indicates otherwise. Results on 42% office waste (Grade A) and 100% office waste (Grade B) are shown in Table 1.

1TABLE 1 Pilot Plant Results for Brightness Gain, Dirt + Ash Removal Efficiency on Grades A and B at Halsey and Results Used in Simulation Models Grade: A B Model Consistency: 0.69% 0.90% 0.62% Brightness Gain: 18.5% 5.3% Dirt Removal: 77-89% 65-87% 80% Ash removal: 63% 64% 64%

[0040] A simulation model was used to calculate the impact of a Comer Cybercel.RTM. flotation cell to deink forward cleaner rejects on solids loss, ash removal and on removal efficiency of mid-dirt (>150 microns) from a 1.sup.st washer to the deinked pulp (while running grade B at 336 tpd at...

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Abstract

A hybrid system for processing papermaking fibers includes a multistage array of forward cleaners coupled with a flotation cell which increases overall efficiency of the system. In a typical embodiment, a first rejects aqueous stream from a first stage bank of centrifugal cleaners is treated in a flotation cell before being fed to a second stage bank of centrifugal cleaners.

Description

CLAIM FOR PRIORITY[0001] This non-provisional application claims the benefit of the filing date of U.S. Provisional Patent Application Serial No. 60 / 180,348, of the same title, filed Feb. 4, 2000.[0002] The present invention relates generally to papermaking fiber processing and more particularly to a method and apparatus useful for cleaning secondary pulp by way of a multistage forward cleaner system with an integrated flotation cell which cooperates with the forward cleaners to boost efficiency of the system.[0003] Processing of papermaking fibers to remove contaminants is well known in the art, including the use of forward cleaners and flotation cells. Such technology is used, for example, to treat secondary (recycle) fiber sources for re-use in paper products such as towel and tissue, paperboard, coated writing and printing papers and so forth. Following is a brief synopsis of some patents of general interest.[0004] According to U.S. Pat. No. 4,272,315 to Espenmiller waste paper ...

Claims

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Application Information

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IPC IPC(8): D21D5/00D21D5/24D21F1/70
CPCD21D5/00D21D5/24D21F1/70
Inventor JONG, ROBERT DE
Owner GPCP IP HLDG LLC
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