GB712814A - Improvements in crystallizers - Google Patents
Improvements in crystallizersInfo
- Publication number
- GB712814A GB712814A GB955850A GB955850A GB712814A GB 712814 A GB712814 A GB 712814A GB 955850 A GB955850 A GB 955850A GB 955850 A GB955850 A GB 955850A GB 712814 A GB712814 A GB 712814A
- Authority
- GB
- United Kingdom
- Prior art keywords
- baffle
- crystals
- diameter
- point
- cylindrical portion
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
<PICT:0712814/III/1> A classifying crystallizer comprises a crystallization vessel 10 of substantially constant cross-section over the major portion of its height, an inlet in, or terminating adjacent the bottom of the vessel and a closed baffle 12 adjacent and symmetrically disposed with respect to the inlet, the baffle being either substantially pear-shaped, or, as shown, substantially biconical. In a modification the baffle has a cylindrical portion of diameter equal to the maximum diameter of the baffle. When a downcomer is used, as shown, the baffle is formed concentrically with the inlet pipe 11. The vertical velocity of the liquid at the point of maximum baffle diameter is at least equal to the settling velocity of the largest crystals which are removed by a siphon or pump. The only crystals below this point are small crystals being recirculated or which have been added with the feed liquid. The baffle diameter at any given point above the point of maximum diameter is arranged to provide a liquid velocity suitable for crystals of a predetermined size, and is determined in accordance with known data for the settling rates of crystals of various sizes together with the known density of suspension required for the proper dissipation of supersaturation. The effect of the baffle having a cylindrical portion is to spread out the zinc containing the largest crystals, such baffles, e.g. of three to ten feet in length, being used with liquors such as ferrous sulphate liquors which desupersaturate slowly. For ammonium nitrate liquors the baffle would have no cylindrical portion. By suitably designing the upper part of the baffle the separation between crystals of two given sizes may have any desired value, increasing as the angle of taper of the baffle decreases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB955850A GB712814A (en) | 1950-04-19 | 1950-04-19 | Improvements in crystallizers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB955850A GB712814A (en) | 1950-04-19 | 1950-04-19 | Improvements in crystallizers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB712814A true GB712814A (en) | 1954-08-04 |
Family
ID=9874308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB955850A Expired GB712814A (en) | 1950-04-19 | 1950-04-19 | Improvements in crystallizers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB712814A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294446A (en) * | 2011-08-05 | 2011-12-28 | 包头联方高新技术有限责任公司 | Slab crystallizer taper tester calibration table |
| CN110075562A (en) * | 2019-04-22 | 2019-08-02 | 天津大学 | A kind of design method of the clarification structure of crystallizer |
| CN115108648A (en) * | 2022-05-23 | 2022-09-27 | 西南交通大学 | Water body in-situ phosphate enrichment device |
-
1950
- 1950-04-19 GB GB955850A patent/GB712814A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294446A (en) * | 2011-08-05 | 2011-12-28 | 包头联方高新技术有限责任公司 | Slab crystallizer taper tester calibration table |
| CN110075562A (en) * | 2019-04-22 | 2019-08-02 | 天津大学 | A kind of design method of the clarification structure of crystallizer |
| CN115108648A (en) * | 2022-05-23 | 2022-09-27 | 西南交通大学 | Water body in-situ phosphate enrichment device |
| CN115108648B (en) * | 2022-05-23 | 2023-10-20 | 西南交通大学 | Water normal position enrichment phosphate device |
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