GB1174478A - A Method of Separating Low Density Impurities from Fibrous Suspensions. - Google Patents
A Method of Separating Low Density Impurities from Fibrous Suspensions.Info
- Publication number
- GB1174478A GB1174478A GB4950667A GB4950667A GB1174478A GB 1174478 A GB1174478 A GB 1174478A GB 4950667 A GB4950667 A GB 4950667A GB 4950667 A GB4950667 A GB 4950667A GB 1174478 A GB1174478 A GB 1174478A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fraction
- hydrocyclone
- fibrous material
- heavy
- light fraction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
- D21D5/24—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in cyclones
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cyclones (AREA)
Abstract
1,174,478. Hydrocyclones. N. A. L. WIKDAHL. 31 Oct., 1967, No. 49506/67. Heading B2P. Low density impurities are separated from fibrous material by feeding a suspension of the impure fibrous material to a hydrocyclone under such operating conditions that a light fraction and a heavy fraction are obtained, the proportion of separated low density impurities in the light fraction being greater than that of the fibrous material in that same fraction. The process is applicable to the purification of paper pulp wherein a minor light fraction contains most of the shives and a small proportion of fibrous material and a major heavy fraction contains the bark and a major portion of the fibrous material. In Fig. 1, the suspension of impure fibrous material is fed at C to a hydrocyclone I from which the light fraction is successively passed through hydrocyolones 2, 3 for further separation. The heavy fractions from the various stages are fed to a common outlet D. In a modification, Fig. 2 (not shown), the light fraction from the first cyclone is further separated in two more hydrocyclones in series as in Fig. I, but the heavy fractions from the second and third stages are recirculated to the first and second stages respectively, the heavy fraction from the first stage being discharged separately. In Fig. 3, the light fraction from a first hydrocyclone 7 is passed to a second hydrocyclone 9 from which the heavy fraction is recirculated to the hydrocyclone 7. The heavy fraction from 7 is passed to a hydrocyclone 8 from which the light fraction is recirculated to 7. Fig. 4 (not shown) discloses another arrangement comprising five hydrocyclones. Experimental results are given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4950667A GB1174478A (en) | 1967-10-31 | 1967-10-31 | A Method of Separating Low Density Impurities from Fibrous Suspensions. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4950667A GB1174478A (en) | 1967-10-31 | 1967-10-31 | A Method of Separating Low Density Impurities from Fibrous Suspensions. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1174478A true GB1174478A (en) | 1969-12-17 |
Family
ID=10452587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4950667A Expired GB1174478A (en) | 1967-10-31 | 1967-10-31 | A Method of Separating Low Density Impurities from Fibrous Suspensions. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1174478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3722440A1 (en) * | 1986-07-10 | 1988-01-14 | N Proizv Ob Krachmaloproduktam | Multi-cyclone system |
-
1967
- 1967-10-31 GB GB4950667A patent/GB1174478A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3722440A1 (en) * | 1986-07-10 | 1988-01-14 | N Proizv Ob Krachmaloproduktam | Multi-cyclone system |
| FR2601264A1 (en) * | 1986-07-10 | 1988-01-15 | N Proizv Ob Tulatschermet | MULTICYCLONES INSTALLATION. |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |