Patent GB-1205444-A (GB)
Title: A centrifuge
Inventor: NEIDL GEORG
IPC: B04B1/04
Filed: 1967-09-01
Abstract: 1,205,444. Centrifugal separators; circulation mixers. G. NEIDL. 1 Sept., 1967 [2 Sept., 1966], No. 40100/67. Headings B1C and B2P. In a centrifuge for separating the heavy and light components of a mixture thereof a plate or disc obliquely mounted on a vertical driving shaft rotates in a housing, an outlet aperture for the light components being provided coaxial with the shaft and an outlet for the heavy components being provided in the lateral wall of the housing. In one embodiment, Figs. 1a and 3, a plate 1 is obliquely mounted on the vertical shaft 6 in a housing 2. On rotation of the plate the liquid mixture is sucked through an inlet 3. Due to the action of centrifugal force, the heavy components are projected horizontally in the direction of the arrows 24 and are discharged through an outlet 4 which is controlled by a throttle valve 7. The light components migrate in the direction of the arrows 15, 16 and are partly discharged through an annular outlet 5 into a chamber 8 having an outlet pipe 9 and partly remixed with the original mixture as indicated by the dash-dot arrow 15. Separation may be automatically regulated by closing or opening the valve 7 hydraulically, pneumatically or electrically with the aid of a timing apparatus at pre-determined intervals of time. To avoid undesirable drying and temperature increase of the heavy component due to an excessively long stay in the housing as a result of complete closure of valve 7 a thermostat 71 is provided on the housing which operates through a parallel circuit to provide an early opening of the valve 7 independently of the timing apparatus and which also serves to provide a signal in case of breakdown. The apparatus may be used to pump sewage, the latter having first been concentrated in the apparatus by discharge of water through the outlet 5. Another application is for the conversion of raw calcium phosphate into superphosphate by means of sulphuric acid which takes the place of the light component. In the apparatus for Fig. 4 which may be used for the refining of petroleum oil, sulphuric acid and the oil to be refined are introduced through the inlet 3. Rotation of the plate 1 causes the components to become intimately mixed. The light refined oil is then discharged in the direction of arrows 16, 17 respectively through an aperture 19 in a hollow shaft 82 and an aperture 18 in the plate 1 and flows down the shaft into a receptacle 21 and a discharge pipe 22. The heavy acid tar separated from the oil is centrifuged through the outlet 4. Part of the oil is also recirculated as shown by the arrow 15. In a modification, Fig. 5b, in which the plate 1 is mounted on a hollow suspended shaft 83, the light components are discharged through apertures 18, 19 in the shaft and plate respectively, the aperture 18 being fitted with an elbowed attachment 84 for deflecting the light component axially of a vortex 85 produced in the interior of the shaft 83 as a result of the relatively large diameter of the shaft interior. In a modification of the latter arrangement, the diameter is chosen to be smaller so that no vortex is formed and no attachment is provided in the aperture 18. In Fig. 8, a plurality of plates each having a number of apertures, are mounted in spaced parallel relationship on a hollow shaft which is provided with apertures 25, 101 respectively below and above each plate for the discharge of the light components. In a modification, the apertures 101 are omitted. Reference has been directed by the Comptroller to Specifications 848,757, 915,421 and 949,463.