| 摘要 |
A pocket-type centrifuge for processing sugar-beet or cane-sugar mash has a rotor which carries an annular array of pockets whose inner portions are formed as sieves and whose outer portions are constructed to mix a wash liquid with the mash that is fed axially into the rotor and that passes radially out over the pockets. A primary filtrate can be extracted from behind the sieves of the inner portions of the pockets, and the remainder of the mash mixture is then mixed with a wash liquid fed into an annular inwardly open chamber above the rotor that feeds its liquid into the outer portions of the pockets. From the pockets the mixed wash liquid and mash is projected onto a downwardly flared skirt of the rotor, and from this skirt onto an upwardly flared outer drum that is rotated slower than the rotor. The lower portion of this drum is solid and imperforate to insure good mixing of the wash liquid and the remaining solid phase, and its upper portion is foraminous so that as the material migrates axially upwardly all of the remaining liquid is extracted from it, along with any soluble substances in the mixture. In this manner most of the liquid phase in the original mixture is extracted, undiluted, at the inner regions of the pockets, and the remaining soluble substances are leached out by the wash liquid. The solids recovered at the upper end of the outer drum are almost completely dry and free of soluble substances.
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