Claims
- 1. A method of centrifugally separating liquids comprising providing a centrifugal drum separator having at least one paring means for the removal of the clarified or separated liquids, a stationary open inlet tube with an outlet which communicates through an opening with a smooth, cylindrical inlet chamber, rotatable with the drum and affixed thereto, a forechamber for receiving liquid from the inlet chamber, and a separating chamber for the clarification and separation, said inlet chamber having outlet ports which are axially spaced from said opening and lead out of the inlet chamber into the forechamber; feeding liquid into the inlet tube at a velocity of at least 5 m/s; disposing the outlet of the inlet tube at a distance of at least thrice the inside diameter of the inlet chamber from the entry of the outlet ports; providing the total cross section of the outlet ports to be larger than the cross section of the inlet tube and smaller than the cross section of the inlet chamber and the inside diameter of the inlet chamber to be about 1.4 times larger than the inside diameter of the inlet tube; choking the flow from the outlet ports to the forechamber to increase the liquid pressure in the lower part of the inlet chamber ahead of the outlet ports to keep the inlet chamber substantially filled with liquid; and venting gas released from the liquid in the forechamber to an annular chamber at the outlet of the inlet tube to be entrained by the liquid flowing out of the inlet tube and into the inlet chamber.
- 2. In a centrifugal drum separator for the clarification and separation of liquids, having at least one paring means for the removal of the clarified or separated liquids, a stationary open inlet tube with an outlet, a smooth, cylindrical inlet chamber, rotatable with the drum and affixed thereto and receptive of liquid from the stationary inlet tube, a forechamber for receiving liquid from the inlet chamber, and a separating chamber for the clarification and separation, said inlet chamber having outlet ports which are axially spaced from said opening and lead out of the inlet chamber into the forechamber which communicates with the separating chamber, the improvement wherein: the distance from the outlet in the inlet tube to the entry of the outlet ports of the inlet chamber is at least thrice the inside diameter of the inlet chamber, the total cross section of the outlet ports is smaller than the cross section of the inlet chamber and larger than the cross section of the inlet tube, the inside diameter of the inlet chamber is larger by about 1.4 times than the inside diameter of the inlet tube, choke means disposed at the outlet ports of the inlet chamber and upstream of the forechamber for increasing the liquid pressure in the lower part of the inlet chamber upstream of the outlet ports to keep the inlet chamber substantially filled with liquids during the feeding of liquid into the drum, means forming an annular chamber at the outlet of the inlet tube and in communication with the inlet tube and means forming at least one vent passage from the forechamber to the annular chamber to provide a vent for gas released from the liquid, whereby gas collecting in the annular chamber is entrained by the liquid flowing out of the inlet tube and into the inlet chamber.
- 3. The centrifugal drum separator of claim 2, wherein the paring means comprises at least one paring disk.
- 4. The centrifugal drum separator of claim 2, wherein the choke means comprises a piston disposed in the inlet chamber and overlapping the outlet ports and means for axially moving same.
- 5. The centrifugal drum separator of claim 2, wherein the choke means comprises a plate insert having at least one riser passage and disposed in the separating chamber, and wherein each riser passage has one outlet port associated therewith.
- 6. The centrifugal drum separator of claim 5, further comprising one forechamber associated with each outlet port-riser passage and wherein the choke means comprises a single closed branch passage for each forechamber having outlet ports, with each discharging into its forechamber.
- 7. The centrifugal drum separator of claim 6, wherein the branch passages taper toward the outlet end thereof.
- 8. The centrifugal drum separator of claim 6, wherein the outlet ports of each branch passage are radially spaced, with the outlet port situated nearer to the drum axis being smaller in cross section than the outlet port situated further outwardly toward the periphery of the drum.
- 9. The centrifugal drum separator of claim 8, wherein the smaller outlet orifice lies on a smaller drum diameter than the inner edge of the riser passage of the plate insert.
- 10. The centrifugal drum separator of claim 9, wherein each forechamber has one vent passage having an inlet orifice disposed adjacent the smaller outlet orifice of the corresponding branch passage.
- 11. The centrifugal drum separator of claim 10, wherein the cross section of each forechamber is about equal to the cross section of the corresponding riser passage.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3019737 |
May 1980 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 267,818, filed May 19, 1981 now abandoned.
US Referenced Citations (10)
Continuations (1)
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Number |
Date |
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Parent |
267818 |
May 1981 |
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