Centrifugal separator and its scraping device
OwnerKei Mukai, Yoshio Nishidainventors
Life of this patent
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Abstract
The centrifugal separator (10) has a scraper (60) for peeling and separating the solid content (94) which is accumulated in the vicinity of the peripheral wall (28) of the container (16) in association with the rotation of the container (16). This scraper (60) is provided with a guide portion (62) which changes the flow of a liquid whirling in the annular space (32) in association with the rotation of the container (16) and allows the liquid to flow obliquely and downwardly onto the solid content (94).
Claims7
A centrifugal separator (10) comprising:
- a vertical shaft (14) connected to a driving system (15);
- and
- a container (16) which rotates together with the vertical shaft (14);
- the container (16) having
- a round base plate (26) centering on the vertical shaft (14);
- a peripheral wall (28) extending substantially parallel to the vertical shaft (14) and upwardly from a peripheral edge of the base plate (26);
- and
- an annular top plate (30) extending inwardly from an upper end of the peripheral wall (28) toward the vertical shaft (14) and having therein a round opening (31) centering on the vertical shaft (14), so that the annular top plate (30) cooperates with the base plate (26) and the peripheral wall (28) to defines an annular space (32) therebelow;
- whereby a suspension (92) made of a liquid and solid content and supplied into the container (16) is held in the annular space (32) and the solid content (94) is accumulated on the peripheral wall (28) by a centrifugal force caused by the rotation of the vertical shaft (14);
- the centrifugal separator (10) further comprising a scraper (60) for scraping and separating an accumulation of the solid content (94) into pieces, the scraper (60) having a guide portion (62) which orients a liquid stream caused in the annular space (32) by the rotation of the container (16) and running in a peripheral direction into a downward, oblique direction toward the peripheral wall (28).
A scraping device (36) for use in a centrifugal separator (10), wherein the centrifugal separator (10) comprises a vertical shaft (14) connected to a driving system (15);
- and a container (16) which rotates together with the vertical shaft (14);
- the container (16) having a round base plate (26) centering on the vertical shaft (14);
- a peripheral wall (28) extending substantially parallel to the vertical shaft (14) and upwardly from a peripheral edge of the base plate (26);
- and an annular top plate (30) extending inwardly from an upper end of the peripheral wall (28) toward the vertical shaft (14) and having therein a round opening (31) centering on the vertical shaft (14), so that the annular top plate (30) cooperates with the base plate (26) and the peripheral wall (28) to defines an annular space (32) therebelow;
- whereby a suspension (92) made of a liquid and solid content and supplied into the container (16) is held in the annular space (32) and the solid content (94) is accumulated on the peripheral wall (28) by a centrifugal force caused by the rotation of the vertical shaft (14), comprising:
- a scraper (60) for scraping and separating an accumulation of the solid content (94) into pieces, the scraper (60) having a guide portion (62, 66) which orients a liquid stream caused in the annular space (32) by the rotation of the container (16) and running in a peripheral direction into a downward, oblique direction toward the peripheral wall (28).
A method for collecting a solid content (94) in a centrifugal separator (10), comprising the steps of:
- rotating a peripheral wall (28) with a shaft (14) for holding a suspension (92) on the peripheral wall (8), the suspension being made of a liquid and solid content, so that the solid content is separated from the liquid and then accumulated on the peripheral wall (28) by a centrifugal force applied thereto;
- moving a scraper (60) toward the peripheral wall (28) continuously or intermittently, the scraper (60) having a plurality of teeth (62) at regular intervals in a direction parallel to the shaft (14);
- and
- guiding the liquid in a direction inclined at a certain angle to a rotational direction of the peripheral wall (28) to impinge the liquid onto the collected solid content (94), causing the solid content (94) to separate from another into pieces.
Dependencies are inferred from the claim text.