GB2118923A - Apparatus for use in adsorbing gaseous fluorine on particles of alumina - Google Patents
Apparatus for use in adsorbing gaseous fluorine on particles of alumina Download PDFInfo
- Publication number
- GB2118923A GB2118923A GB08309406A GB8309406A GB2118923A GB 2118923 A GB2118923 A GB 2118923A GB 08309406 A GB08309406 A GB 08309406A GB 8309406 A GB8309406 A GB 8309406A GB 2118923 A GB2118923 A GB 2118923A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alumina
- adsorption column
- alumina particles
- particles
- gaseous fluorine
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Means for preventing the alumina particles suspended in the adsorption column from moving by gravity in counter-current to the gaseous fluorine beyond a predetermined threshold is a rectilinear duct at the bottom of the adsorption column mounting internally an orifice plate selected from a plurality of orifice plates having differently-sized orifices, and an alumina delivery arrangement for delivering alumina particles into the column above the orifice plate. <IMAGE>
Description
SPECIFICATION
Apparatus for use in absorbing gaseous fluorine on particles of alumina
This invention relates to apparatus for use in absorbing gaseous fluorine on particles of alumina.
Such an apparatus is known and includes an adsorption column through which gaseous fluorine is passed upwardly and which has at its bottom a means for preventing alumina particles suspended in the column for moving by gravity in counter-current to the gaseous fluorine beyond a predetermined threshold. Such means are a convergent-divergent duct (i.e. a Venturi) into the divergent part of which the alumina particles are downwardly introduced into contact with the upwardly-flowing gaseous fluorine.
The present invention is particularly concerned with such means and provides an alternative solution, which tests have shown to provide a better distribution of the adsorbing alumina particles than is obtained in the known apparatus, and which additionally permits the operator to take account of gaseous fluorine volumes and the introduced amounts of unsaturated powdered alumina.
According to the present invention there is provided apparatus for use in adsorbing gaseous fluorine on particles of alumina in which the means for preventing the alumina particles suspended in the adsorption column from moving by gravity in counter-current to the gaseous fluorine beyond a predetermined threshold is a rectilinear duct at the bottom of the adsorption column mounting internally an orifice plate selected from a plurality of orifice plates having differently-sized orifices, and an alumina delivery arrangement for delivering alumina particles into the column above the orifice plate.
Preferably the delivery arrangement feeds the alumina particles horizontally into the column, although downward in-feed is also visualised.
There is preferably a second delivery arrangement for feeding recycled activated alumina particles into the adsorption column preferably at a level above the feed-in point of the raw alumina particles and preferably horizontally.
Here again, downward feed-in is visualised. Such recycled activated alumina particles are preferably recovered for filter means. The filter means may be one or more filter bag units.
An embodiment of the present invention will now be described by way of example, with reference to the accompanying drawings, in which:~
Fig. 1 is a diagrammatic part sectional view of apparatus according to the invention;
Figs. 2 and 3 are diagrammatic side and front views of the apparatus of Fig. 1; and
Figs. 4 and 5 are diagrammatic views of modifications.
In general terms, the apparatus for use in adsorbing gaseous fluorine on particles of alumina comprises an adsorption column 10 connected by a transition unit 11 to a branched duct 12, each branch of which is connected to a filter bag unit 1 3 or other separator from which gas egresses through a chimney indicated by an arrow 14.
Alumina partly charged with fluorine is delivered to a storage hopper (not shown) from where it is recycled to the adsorption column 10 as described below.
Gaseous fluorine is delivered to the adsorption column along a horizontal duct 15 which is tapered to maintain velocity of the gas.
As previously stated, the adsorption column 10 has at its bottom a means for preventing alumina particles suspended in the column 10 from moving by gravity in counter-flow to the gaseous fluorine beyond a predetermined threshold. Such means is housed between the column 10 and the duct 15 in a vertical rectilinear duct 16 within which is mounted an orifice plate 17 which determines the aforesaid threshold. This orifice plate 17 is one of a number of orifice plates 1 7 having different orifice sizes, the appropriatelysized orifice plate 17 being selected and slotted into an appropriate gap in the duct 16.
Such substitution allows the operator to take account of, for example, the volume of gaseous fluorine being delivered to the column 10 and/or the amount of unsaturated powdered alumina being introduced.
Unsaturated powdered alumina is delivered into the stream of gaseous fluorine above the orifice plate 17 by a screw feed arrangement 18 which horizontally inputs the alumina into the gas stream through horizontal duct 19.
Recycled alumina partially charged with fluorine is recycled to the adsorption column 10 by a horizontal delivery duct 20 fed from the storage hopper (not shown) or even directly from the bag filter units 13 as indicated by lines 21.
The introduction of alumina particles into the adsorption column 10 at the horizontal ducts 19 and 20 may be improved or assisted by allowing air or gas to be drawn in and/or by introducing air or gas under pressure and indicated by the arrows 22. Alternatively, air or gas is drawn in or introduced under pressure at both alumina particle delivery ducts 1 9 and 20.
In Fig. 4, the orifice plate 17 is immediately adjacent the duct 1 5 as it is in Fig. 5 but in the latter the length of rectilinear duct 16 is reduced to reduce the overall height of the adsorption column 10.
In our copending Patent Application No.
81 16349 filed 28th May 1981 there is disclosed as an alternative to the plurality of orifice plates with differently-sized orifices, a variable diameter, or variable cross-sectional area, orifice plate.
Claims (9)
1. Apparatus for use in adsorbing gaseous fluorine on particles of alumina in which the means for preventing the alumina particles suspended in the adsorption column from moving by gravity in counter-current to the gaseous fluorine beyond a predetermined threshold is a rectilinear duct at the bottom of the adsorption column mounting internally an orifice plate selected from a plurality of orifice plates having differently-sized orifices, and an alumina delivery arrangement for delivering alumina particles into the column above the orifice plate.
2. Apparatus as claimed in claim 1, in which the delivery arrangement feeds the alumina particles horizontally into the adsorption column.
3. Apparatus as claimed in claim 1 or 2 comprising a second delivery arrangement for feeding recycled activated alumina particles into the adsorption column.
4. Apparatus as claimed in claim 3 in which the second delivery means delivers the recycled activated alumina particles horizontally into the adsorption column.
5. A modification of the apparatus as claimed in claim 4 in which one or both delivery arrangements feeds the alumina particles downwards into the adsorption column.
6. Apparatus as claimed in claim 4 or 5, in which the introduction of alumina particles in the adsorption column is assisted by entrainment of, or pressure feed-in of air and/or gas at the delivery arrangements.
7. Apparatus as claimed in any one of claims 1 to 6 in which the adsorption column at its top is connected to a separator.
8. Apparatus as claimed in claim 7 in which the separator is a filter bag unit.
9. Apparatus for use in adsorbing gaseous fluorine on particles of alumina, substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08309406A GB2118923B (en) | 1980-05-30 | 1983-04-07 | Apparatus for use in adsorbing gaseous fluorine on particles of alumina |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8017828 | 1980-05-30 | ||
| GB08309406A GB2118923B (en) | 1980-05-30 | 1983-04-07 | Apparatus for use in adsorbing gaseous fluorine on particles of alumina |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2118923A true GB2118923A (en) | 1983-11-09 |
| GB2118923B GB2118923B (en) | 1984-04-11 |
Family
ID=26275693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08309406A Expired GB2118923B (en) | 1980-05-30 | 1983-04-07 | Apparatus for use in adsorbing gaseous fluorine on particles of alumina |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2118923B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0455521A1 (en) * | 1990-04-23 | 1991-11-06 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Enhanced performance of alumina for the removal of low-level fluorine from gas streams |
| CN105749726A (en) * | 2016-05-18 | 2016-07-13 | 浙江九达环保设备有限公司 | Protection device and protection method of desulfurization slurry circulation system filter screen |
| CN107174933A (en) * | 2017-06-01 | 2017-09-19 | 山东三融环保工程有限公司 | A kind of smoke eliminator with turbulent flow gas-liquid switching layer |
-
1983
- 1983-04-07 GB GB08309406A patent/GB2118923B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0455521A1 (en) * | 1990-04-23 | 1991-11-06 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Enhanced performance of alumina for the removal of low-level fluorine from gas streams |
| CN105749726A (en) * | 2016-05-18 | 2016-07-13 | 浙江九达环保设备有限公司 | Protection device and protection method of desulfurization slurry circulation system filter screen |
| CN107174933A (en) * | 2017-06-01 | 2017-09-19 | 山东三融环保工程有限公司 | A kind of smoke eliminator with turbulent flow gas-liquid switching layer |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2118923B (en) | 1984-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI78325B (en) | FLOTATIONSANORDNING FOER FLOTATION AV EN UR MAKULATURPAPPER UTVUNNEN FIBERSUSPENSION. | |
| PL264488A1 (en) | Apparatus with a dust inhaler | |
| US3164548A (en) | Tower type pneumatic separator | |
| DE3570193D1 (en) | Method for uniformly distributing discrete particles on a moving porous web | |
| CA2090618A1 (en) | High efficiency liquid/liquid hydrocyclone | |
| GB1035235A (en) | Method and apparatus for blending granular materials | |
| GB1358904A (en) | Helical flow centrifugal separators | |
| US3182977A (en) | Apparatus for mixing and purifying fluid mediums | |
| EP0968746A4 (en) | Crystallization apparatus and crystallization method | |
| CA1059951A (en) | Process and apparatus for separating solid granular metallurgical products and their precursors | |
| KR850002438A (en) | Method and apparatus for generating and using spiral lift in conduits | |
| GB2118923A (en) | Apparatus for use in adsorbing gaseous fluorine on particles of alumina | |
| US4931174A (en) | Zigzag classifier | |
| US4551240A (en) | Apparatus for classifying particulate material with air currents | |
| GB2076794A (en) | Apparatus for Use in Adsorbing Gaseous Fluorine on Particles of Alumina | |
| CA1173084A (en) | Feeder/distributor apparatus for granular coal | |
| US4933072A (en) | Material classifier | |
| DE3478285D1 (en) | Apparatus for sorting and separating valuable materials from a mixture | |
| JP3242457B2 (en) | Method and apparatus for introducing flammable powder into hot melt | |
| GB996881A (en) | Improvements in or relating to solid material sorting apparatus | |
| GB849340A (en) | Improvements in and relating to vibratory grinding | |
| SE9203535L (en) | Pollution separation device | |
| RU1577148C (en) | Device for loading electric separator | |
| EP0063960A3 (en) | Improvements relating to apparatus for the conveying of particulate material | |
| CA2019959C (en) | Method and apparatus for process for processing ground-up mixtures of minerals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |