US4134828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method for the fractionation of suspended solids by means of hydrocyclones
Assignee: Amberger Kaolinwerke GmbH
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Filing: 1977-05-18
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Granted: 1979-01-16
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Expires: 1997-05-18
Abstract
Abstract A method and apparatus for fractionation with hydrocyclones for providing the relative sharp separation between separate meshes being divided, by cumulating a slurry-fill as a regulative bulk measured variable below a lower reject nozzle, and adjusting the clearance between the surface of the slurry-fill and the lower edge of an overflow adjusted to a predetermined length which is reversely proportional to a desired separation mesh by means for changing or retaining constant the fill level of the slurry fill.
Inventors
- 👤 Helmut F. Trawinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:28
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/081; B04C11/00; B04C5/14; B04C5/16
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
127 words
The method of fractionally separating a liquid suspension into a heavier fraction and a lighter fraction comprising introducing a flow of said suspension into a hydrocyclone separator having an upper overflow and a lower adjustable reject nozzle to effect separation of said suspension into heavier and lighter fractions, discharging said lighter fraction through said upper overflow and said heavier fraction through said reject nozzle, controlling the rate of discharge of said heavier fraction through said nozzle relative to the rate of introduction of said suspension into the separator to provide a slurry fill within said separator above said reject nozzle, measuring the level of said slurry fill above said reject nozzle and controlling the height of said slurry fill to establish the separation mesh of said fractions.
Claim 2
Independent Claim
127 words
The method of fractionally separating a liquid suspension into a heavier fraction and a lighter fraction comprising introducing a flow of said suspension into a hydrocyclone separator having an upper overflow and a lower adjustable reject nozzle to effect separation of said suspension into heavier and lighter fractions, discharging said lighter fraction through said upper overflow and said heavier fraction through said reject nozzle, controlling the rate of discharge of said heavier fraction through said nozzle relative to the rate of introduction of said suspension into the separator to provide a slurry fill within said separator above said reject nozzle, measuring the level of said slurry fill above said reject nozzle and controlling the height of said slurry fill to establish the separation mesh of said fractions.
Claim 3
Dependent Claim
39 words
The method according to claim 1, characterized in that the rate of discharge of said heavier fraction is controlled by adjusting the cross section of said reject nozzle in relation to the height or mass of the slurry fill.
Claim 4
Dependent Claim
49 words
The method as claimed in claim 2 including the step of measuring the viscosity of said heavier fraction discharged from the reject nozzle, and controlling the cross-sectional opening of the reject nozzle in relation to the measured viscosity so that the viscosity is maintained at a substantially constant value.
Claim 5
Dependent Claim
81 words
The method as claimed in claim 3 in which a control loop for changing the cross section opening of the reject nozzle according to the fill level or mass of the slurry level, and a second control loop for changing the opening cross section of the reject nozzle in relation to the viscosity or concentration of the heavier fraction being measured are combined into a mutually differential regulation which influences the adjusting of the opening cross section of the reject nozzle.
Claim 6
Independent Claim
113 words
A system for fractionally separating a liquid suspension into a heavier fraction and a lighter fraction said system comprising a hydrocyclone separator for receiving and separating the suspension, said separator including an upper overflow for discharging the lighter fraction, a lower adjustable reject nozzle for discharging the heavier fraction and means defining at least one annular damming area above said reject nozzle, said reject nozzle including control means for controlling the cross-sectional opening of the reject nozzle for adjusting the rate of discharge of said fraction to establish a slurry fill above said damming area and means for controlling the height of said slurry fill thereby controlling the separation mesh of said fraction.
Claim 7
Independent Claim
113 words
A system for fractionally separating a liquid suspension into a heavier fraction and a lighter fraction said system comprising a hydrocyclone separator for receiving and separating the suspension, said separator including an upper overflow for discharging the lighter fraction, a lower adjustable reject nozzle for discharging the heavier fraction and means defining at least one annular damming area above said reject nozzle, said reject nozzle including control means for controlling the cross-sectional opening of the reject nozzle for adjusting the rate of discharge of said fraction to establish a slurry fill above said damming area and means for controlling the height of said slurry fill thereby controlling the separation mesh of said fraction.
Claim 8
Dependent Claim
41 words
The system as claimed in claim 1 in which said hydrocyclone separator includes a plurality of annular damming areas spaced between said lower reject nozzle and said upper overflow, said damming areas having respective progressively increasing areas toward said reject nozzle.
Claim 9
Dependent Claim
45 words
The system as claimed in claim 1 including measuring means for measuring the height or mass of the slurry fill, and means for transmitting the measured results to said control means for adjusting the reject nozzle cross section whereby the slurry level can be adjusted.
Claim 10
Dependent Claim
42 words
The system as claimed in claim 7, including means for adjusting the opening cross section of said reject nozzle of the hydrocyclone separator when the hydrocyclone separator is empty for establishing a predetermined base value prior to operation of the separating system.
Claim 11
Dependent Claim
52 words
The system as claimed in claim 8 including spring means operatively engaged with said hydrocyclone separator and against which the weight of said hydrocyclone separator reacts, the spring force, subject to the weight of said hydrocyclone, being operatively connected to a device for setting the opening cross section of the reject nozzle.
Claim 12
Dependent Claim
38 words
The system as claimed in claim 1 in which said means for controlling the height of the fill level of slurry includes a hydraulically-responsive probe for reflecting the hydraulic force in relation to the depth of the slurry.
Claim 13
Dependent Claim
35 words
The system as set forth in claim 7 in which said measuring means includes means to assertain the level of the slurry in said hydrocyclone and comprises any one of X-ray or isotopic ray means.
Claim 14
Dependent Claim
26 words
The system as claimed in claim 7 in which said measuring means includes means for measuring the weight of the slurry and comprises a pressure-measuring container.
Claim 15
Dependent Claim
49 words
The system as claimed in claim 7 in which the measuring means comprises means for measuring the slurry fill level and includes at least one of an electrical, hydraulic or pneumatic control means operatively connected to the control means for changing the opening cross section of the reject nozzle.
Claim 16
Dependent Claim
38 words
The system as claimed in claim 7 in which the control means in series with said reject nozzle for changing the cross-sectional opening thereof comprises a control element adjustably-controlled for movement into or out of said reject nozzle.
Claim 17
Dependent Claim
70 words
The system as claimed in claim 5 wherein said means for controlling the height of said slurry fill includes below said reject nozzle a viscosity-measuring container for receiving a proportional part of the heavier fraction discharged from the reject nozzle, said viscosity-measuring container and a regulating device for controlling the viscosity of said heavier fraction in response to changes in the quantity of said heavier fraction in said viscosity-measuring container.
Claim 18
Dependent Claim
54 words
The system as claimed in claim 15 in which said regulating device comprises a rod system operatively connected to an adjustable weight and balance beam whereby the weight of the viscosity-measuring container can be correspondingly adjusted in relation to the opening cross-section of the hydrocyclone separation due to weight changes of the viscosity-measuring container.
Claim 19
Dependent Claim
68 words
The system as claimed in claim 15 including a differential linkage system operatively connected to said hydrocyclone separator for reflecting changes between the weights of said hydrocyclone and viscosity-measuring container in relation to said adjustable weight, the differential linkage system including means for adjusting the opening cross-section of the reject nozzle in accordance with the total result of changes of the weight of the hydrocyclone and viscosity-measuring container.
Claim 20
Dependent Claim
106 words
The system as claimed in claim 5 including a limiter within the hydrocyclone separator for limiting the upper level of the slurry fill in said hydrocyclone, the limiter comprising a float element, having a specific gravity which is greater than the expected slime density at said overflow, and which is less than the specific weight of the slurry in said hydrocyclone; means for identifying the elevation of the limiter and adjusting means connected to said identifying means for comparing the elevation of said limiter with a preset desired value, and effecting adjustment of the opening cross section of the reject nozzle in relation to said limiter.
Claim 21
Dependent Claim
55 words
The system as claimed in claim 18, wherein said limiter includes a measuring means guided through said overflow for transmitting the elevation of said limiter to a rod system externally of said hydrocyclone; and means for adjusting the cross section of said reject nozzle in relation to movement of the limiter on said rod system.
Claim 22
Dependent Claim
58 words
The system as claimed in claim 19, wherein said rod system includes an intermediately pivoted lever, a roller at one end supporting the measuring means extending through said overflow, a weight and an adjustable rod hinged on said lever for tensioning the measuring means, and a further lever carrying a control element operatively associated with said reject nozzle.
Claim 23
Dependent Claim
17 words
The system as claimed in claim 18, including means for automatically preventing undesired emptying of the hydrocyclone.
Claim 24
Dependent Claim
27 words
The system as claimed in claim 18, wherein the limiter is supported and centered within the hydrocyclone by means of arm elements permitting slurry to penetrate therethrough.
Claim 25
Dependent Claim
30 words
The system as claimed in claim 22, including a rod connected to an element for controlling the cross-section of said reject nozzle, said arms including guide means surrounding the rod.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |