Braunschweigische Maschinenbauanstalt Ag

Braunschweigische Maschinenbauanstalt

Heinrich Kurland

Helmut Schaper

Erwin Zeichner

Joachim Schueller

Volkmar Hentschel

Gustav Warner

Peter Natt

Hermann Luehrs

A continuously operable centrifuge for spinning off sugar massecuite has an upwardly conically expanded strainer basket (20) mounted for rotation about a vertical axis (16). A downwardly conically expanding massecuite distributor (40) rotating with the basket reaches into a floor region of the strainer basket substantially coaxially to the strainer basket. The lower rim of the distributor forms a throw-off edge. Inside and in the upper region of the massecuite distributor (40), a distributing cup (30) is for distributing massecuite. The peripheral wall of the massecuite distributor (40) is formed by several ring elements (41), (42, 43) which partly overlap in the axial direction leaving an annular gap (44, 45). The product distributor is surrounded by a downwardly conically expanding stationary bell (51) which forms a further gap or gap space between itself and the rotating rings.

Continuously operating centrifuge

A continuously operable sugar centrifugal is equipped with an upwardly opening conical centrifugal drum surrounded by a sugar collecting housing (3). The upper edge of the drum (1) is equipped with a sugar discharge flange which faces a rotatably mounted ring carrying a plurality of sugar crystal deflecting, spring elastically yielding, sheet metal members which may be mounted in a fixed position or in an adjustable position to the rotatable ring. In the embodiment with the adjustable sheet metal members, their angular position relative to the flight direction of the sugar crystals may be selected in accordance with particular requirements. The sheet metal members are so located that they function as sugar intercepting and deflecting elements. A ring conduit for applying a mashing liquid to the sheet metal members is arranged in a stationary position in parallel to the rotatable ring and axially spaced from the ring. The conduit is equipped with uniformly spaced exit openings for the discharge of mashing liquid onto the sheet metal members. A guide skirt or ring member may be so arranged as to guide the mashing liquid onto the sheet metal members, or so as to guide the liquid onto the sheet metal members and the sugar crystals into the collecting chamber.

Continuously operable sugar centrifuge

A continuously operating centrifugal for mashing and centrifuging of sugar massecuite is equipped with an upwardly, conically opening screen drum (2) which is rotating about a vertical axis (1). The screen drum is carried by a hub (5) reaching into the interior of the drum and supporting at its top a supply and distributing pot (6) for the massecuite and a precentrifuging bell (8) surrounding the distribution pot and reaching into a bottom zone of the screen drum. The precentrifuging bell also has a conical shape opening downwardly. A discharge rim (17) of the precentrifuging bell (8) is surrounded by a mashing ring (9) rotating along with the drum and bell. The mashing ring widens conically and downwardly. Stationary tubular members (14) are provided for supplying the mashing liquid onto the radially inwardly facing surface of the mashing ring (9). The tubular members (14) open toward the ring (9) above a zone on which the mass coming from the bell (8) impinges on the meshing ring for forming a lubricating film of mashing liquid on the surface of the mashing ring which substantially facilitates the mashing.

Continuously operable centrifuge for mashing and centrifuging of sugar

A continuously operating sugar centrifugal is equipped with the following components, a massecuite supply device, a frustum-shaped screen drum which is rotatably drivable, a housing surrounding the screen drum, a distributor and accelerating device arranged for cooperation with the screen drum, cover water nozzles arranged in a fixed position in the drum, and an air guide ring. The air guide ring is located at the widening upper open end of the drum. The air guide ring widens conically and forms an extension or elongation of the screen drum. A passage or exit gap for the sugar to be discharged from the drum, is provided between the upper drum edge and a rim of the air guide ring facing the drum. The air guide ring rim facing away from the drum reaches into a ring-shaped air scoop and collecting space (17) which is open toward the interior of the drum.

Sugar centrifuge

A continuously operable sugar centrifuge modified as taught herein is capable of producing quality sugar. For this purpose elastic, spring resilient sheet metal members (11) are attached to a rotatable ring with an adjustable angle of incidence so that the surface of these flexible sheet metal members encloses a selectable incidence angle with the flight path (12) of the sugar crystals, whereby the speed with which the sugar crystals impinge on the flexible sheet metal members may be controlled. Such control may be accomplished, for example, by a closed loop deceleration or braking action of the rotatable ring carrying the metal members.

Continuously operating sugar centrifuge

A continuously operable sugar centrifugal for mixing and curing sugar massecuites includes an intermediate mixing device between inner and outer centrifugal baskets. The mixing device is formed by a ring housing with an impact zone, retaining zone, and inclined baffles to impart turbulence and transform the kinetic energy of sugar received from the inner basket into the work of mechanical mixing. Mixing liquid is introduced into the received sugar and the mixture eventually passes over the lower edge of the mixing device into the outer basket for final separation and curing. The mixing device is stationary relative to the inner basket or rotates at a slower speed and may assume a variety of advantageous geometries.

Continuously operable centrifugal for mixing and curing sugar massecuites

A continuously operable sugar centrifuge separates sugar massecuites into syrup portions of differing quality and crystalline sugar. The centrifugal screening basket is mounted for rotation within a housing divided into a plurality of different compartments for receiving syrup portions of differing quality from the screening basket. The housing also includes a first common collecting chamber for green syrup and a second common collecting chamber for high green syrup. Adjustable valves are provided between at least some of the compartments and the collecting chambers for alternatively connecting a compartment to either the first or second collecting chamber for separate discharge of syrup according to the quality of syrup received in the compartment. Mixing of syrup portions of differing quality is prevented by sealing elements even though the transition zone from green syrup to high green syrup shifts up or down along the basket wall.

Continuously operable sugar centrifugal

A continuously operating centrifugal or centrifuge for centrifuging sugar massecuites and for remashing the centrifuged sugar, comprises a ring conduit with nozzles for mixing liquid directed at the upper wide end of the centrifugal basket. The ring conduit is arranged in a housing having a cover, above a frustum-shaped centrifugal basket equipped with screens and rotating about a vertical axis of rotation. A conical baffle member is arranged radially outside of the upper edge of the centrifugal basket for intercepting the sugar crystals. A cover ring is mounted at the upper end of the centrifugal basket at a small distance from the ring conduit. The radial width of the cover ring corresponds at least to the spraying range of the nozzles for the mixing liquid. The conical baffle member is shaped like a frustum and opens upwardly. The centrifuge includes a mixing compartment enclosed by smooth walls.

Continuously operating centrifugal

The present centrifuge is especially adapted for centrifuging massecuite in the production of sugar. Two functional and structural units are separated from each other in such a manner that each unit may be supported independently of the other unit, yet so as to properly cooperate with each other. Thus, an inner housing and the rotating drum with the drive means for the drum form an inner, integral unit while an outer housing and a cover as well as the massecuite supply means form a further, outer integral unit. A carrier member, preferably in the form of a hollow channel, extends from the inner housing through the outer housing to support the drum drive means outside of the outer housing, but as part of the inner unit.

Growing community of inventors

Erkerode-Lucklum, Germany

Heinrich Kurland