Process for aerating dispersions
AssigneeAndritz Inc.
InventorsHelmuth Gabl, Erwin Hertl, Bernhard Scherzinger
Life of this patent
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Abstract
A device and process for aerating dispersions, particularly for flotation of pulp suspensions, in a de-inking process. The process includes at least two stages, where each stage has a separate liquid circulating system which sucks in the gas or air and mixes it with the liquid. The device has at least two flotation cells, with each of the cells having a separate injector and a separate circulation system including a pump.
Claims6
Process for aerating pulp suspensions in a de-inking apparatus to produce accept pulp suspension, the apparatus having a first primary cell and at least one subsequent primary cell, each of the primary cells having a separate liquid circulating system including an injector, the process comprising the steps of:
- a) receiving a flow of pulp suspension at a feed rate in the first primary cell;
- b) sucking in air with the injector of the first primary cell;
- c) mixing the air and pulp suspension with the injector of the first primary cell;
- d) feeding accept pulp suspension to a subsequent primary cell:
- e) sucking in air with the injector of the subsequent primary cell;
- f) mixing the air and pulp suspension with the injector of the subsequent primary cell;
- g) repeating steps d)-f) for each remaining subsequent primary cell.
Dependencies are inferred from the claim text.