Apparatus for preliming raw sugar juice.

摘要

The juice of sugar beet obtd. by extraction is limed preliminarily in a vertical cylinder having at one end an inlet for the raw juice and at its other end an outlet for the treated product, together with a feed opening for the milk of lime. The cylinder is divided by roughly horizontal partitions into chambers one above the other. These have passages which allow an interchange of fluid between them. Agitators for the fluid are fixed to a vertical shaft, centrally positioned in the cylinder. These bring about a partial reversal of the flow from the inlet to the outlet and a mixing of the raw juice of one chamber with that of an adjacent chamber. The flow reversing agitators are formed by a system of pipes each of which is bent at an angle and connects two chambers together. Each pipe has a suction inlet formed at the top end of a vertical leg and an outlet at the outer end of an horizontal leg, in the lower of the two chambers, when the cylinder is arranged with the raw juice inlet below and the outlet above. Improves the design of the machine particularly as regards the partial reversal of flow so that more accurate fixing of the pH values is obtd. in the separate chambers.