Importance

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Abstract

The precipitant is provided in the precipitant reservoir (9), the polymer solution in the reservoir container (6). By means of the precipitant pump (7), the precipitant is fed under pressure to the nozzle arrangement (4) and the free jet (1) is generated. The polymer solution arrives in the form of a continuous, non-atomized polymer solution jet (2) onto the flat side of the free jet (1). At the location (3) of impact of the polymer solution jet (2), the average differential velocity between the precipitant stream and the polymer solution is greater than or equal to one meter per second. Due to corresponding shear forces at the location (3) of impact, a good distribution of the polymer solution on the surface of the free jet (1) and at the same time an immediately good mixing of polymer solution and precipitant is achieved. In the free jet (1), the polymer contained in the supplied polymer solution is precipitated as solid polymer particles. The resulting mixture of precipitant, solvent and polymer solution is collected in a collecting tank (11). In the centrifuge (13) or a filter device, the polymer particles are separated from the liquid.

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First Claim