GB2332186A - Particle conveyor - Google Patents
Particle conveyor Download PDFInfo
- Publication number
- GB2332186A GB2332186A GB9726350A GB9726350A GB2332186A GB 2332186 A GB2332186 A GB 2332186A GB 9726350 A GB9726350 A GB 9726350A GB 9726350 A GB9726350 A GB 9726350A GB 2332186 A GB2332186 A GB 2332186A
- Authority
- GB
- United Kingdom
- Prior art keywords
- powder
- directed
- particulate material
- compartment
- gas
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/106—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure, e.g. its axis, being substantially straight and horizontal, e.g. pneumatic drum dryers; the drying enclosure consisting of multiple substantially straight and horizontal stretches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G27/00—Jigging conveyors
- B65G27/04—Load carriers other than helical or spiral channels or conduits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G37/00—Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/16—Gas pressure systems operating with fluidisation of the materials
- B65G53/18—Gas pressure systems operating with fluidisation of the materials through a porous wall
- B65G53/20—Gas pressure systems operating with fluidisation of the materials through a porous wall of an air slide, e.g. a trough
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/26—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by reciprocating or oscillating conveyors propelling materials over stationary surfaces; with movement performed by reciprocating or oscillating shelves, sieves, or trays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F26B3/092—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating
- F26B3/0923—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating by mechanical means, e.g. vibrated plate, stirrer
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Air Transport Of Granular Materials (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Jigging Conveyors (AREA)
Abstract
Apparatus for, and a method of, conveying particulate material, eg., adhesive or cohesive powder, comprises a vibrating tray 2 closed at its top by a porous sheet 4, wherein the powder is directed downwards towards the sheet 4, and gas is directed, via inlets 6, upwards through the sheet 4 to fluidise the powder, the vibratory motion of the tray transporting the powder along the apparatus. The upper compartment 14 has a powder inlet 16 at one end, a powder outlet 18 at the other end thereof and a gas vent 20.
Description
2332186 Particle Conveyor
Field of the Invention
This invention relates to an apparatus for, and a method of, transporting particulate material. it finds application, though not exclusively, in transporting powder that may be adhesive or cohesive, for example as used in the manufacture of photographic emulsions.
Background of the Invention
The term "powder" is to be understood as encompassing particles of various size, including those commonly referred to as grains or granules.
It is known to use a vibrating tray to transport particles, the particles being bounced along the surface thereof. Such equipment is commercially available, for example, from Riley Automation Limited in England.
It is also known to use a fluidised bed to assist in the transport of powders, in which a porous membrane has air, or other gas directed through it so as to turn the powder into a more fluid medium to facilitate its transportation. For example, a porous sheet of sintered high density polyethylene or polypropylene, available from Porvair Technology in the UK, may be used in an air assisted gravity conveyor The sheet is inclined to the horizontal, air is directed upwards therethrough, and powder, directed onto the upper end, is fluidised and falls under gravity to the lower end of the sheet.
Dutch Patent Application Publication Number 7707435 relates to the flow of powders whose cohesiveness makes it difficult, or even impossible, for them to flow by means of a gas alone. Mechanical vibration is applied in addition to fluidisation to facilitate movement of the powder. A fluidised bed is formed by directing air upwards through a horizontal porous stainless steel plate at the lower end of a vertical silo. The plate is vibrated vertically. A hole in the centre of the plate allows the fluidised stream of powder and air to fall through under gravity for connection to a conventional pneumatic powder conveying system.
Problem to be Solved by the Invention It is an object of the present invention to provide for transport of particulate material in a direction transverse to the vertical, for example, inclined thereto, and particularly horizontally.
It is another object of the present invention to provide for transport of adhesive or cohesive particulate material. Summary of the Invention
In accordance with one aspect of the present invention, there is provided apparatus for transporting 15articulate material, particularly though not exclusively adhesive or cohesive powder, comprising a porous member onto which the material is directed, means for directing gas, preferably air, upwards through the member to fluidise the material, and means for vibrating the member to effect transport of the fluidised material therealong.
The porous member may be vibrated substantially in the horizontal direction.
Preferably, the porous member is planar and is disposed substantially horizontally. The member may, however, be inclined slightly, at up to about 20' to the horizontal, for example, further to assist in the transport of the particulate material.
-3 The porous member is preferably formed from sintered plastics material, for example high density polyethylene or polypropylene, or metal.
The apparatus may comprise a compartment into which the gas is directed, with the porous member closing the top thereof. The entire compartment may be vibrated.
In a preferred embodiment, the apparatus may comprise an upper compartment into which the particulate material is directed, and a lower compartment into which the gas is directed, wherein the two compartments are separated by the porous member.
The or each compartment may be closed on all sides apart from orifices necessary for the entry and exit of the particulate material and gas as appropriate.
In accordance with another aspect of the present invention, there is provided a method of transporting particulate material, comprising the steps of directing the material onto a porous member, directing gas upwards through the member to fluidise the material, and vibrating the member to transport the material therealong.
Preferably, the material is transported substantially horizontally along the member.
Advantageous Effect of the Invention The present invention thus conveniently allows particulate material, and especially adhesive or cohesive material, to be transported in a direction other than vertically, under gravity, without sticking to the underlying apparatus. This result is unexpected since initially, that is to say before the idea was reduced to practice, it was expected that the fluidisation of the material would decouple it mechanically from the vibrating member, which would not then be able to transmit any transverse movement to it. This expectation is confirmed by the Dutch publication referred to above. In NI, 7707435, vibrating the plate assists in fluidising the cohesive powder so that it can fall downwards under gravity, and the subsequent use of a conventional pneumatic powder conveying system demonstrates that it was not realised that transport in a transverse direction was 10 feasible or possible. Brief Description of the Drawings
Apparatus for, and a method of, transporting particulate material, will now be described, by way of example, with reference to the accompanying drawings, 15 in which:
Figure 1 is an underneath view of a powder conveying apparatus; Figure 2 is a side elevation of the apparatus of Figure 1; and Figure 3 is a top view of the apparatus of Figure 1. 1 Detailed Description of the Invention
Referring to the Figures, a shallow elongate stainless steel tray 2 is covered by a planar sheet 4 of sintered high density polyethylene, to form a lower, air compartment 5. Small orifices 6 in the sides of the tray 4 provide entry points for air into the compartment 5, at a pressure typically between 3 and 20 p.s.i.. A plate 8 is firmly secured to the underneath of the tray 2 and is connected by rams 10 to a mechanism (not shown) for vibrating the tray 2.
The upper surface of the porous sheet 4 is enclosed within a lid 12 to form an upper, transport compartment 14. At one end, the lid 12 has a relatively large upstanding cylindrical inlet 16 for receiving the powder to be transported. At the other end of the compartment 14, a large cylindrical outlet 18 extends downwards, beyond the end of the air compartment 5, through which powder leaves the apparatus. Intermediate its length, the lid 12 is provided with an upstanding cylindrical outlet 20 for the air that enters the compartment 14 from the compartment 5 through the porous sheet 4.
In operation, 10 the transport particulate material (not shown) enters compartment 14 through the inlet 16 and falls towards the porous sheet 4. The plate 8, and thus the tray 2 and sheet 4, is vibrated, and air is supplied into the compartment 5. The combination of the vibration of the sheet 4 and the flow of air upwards therethrough, not only fluidises the particulate material in the compartment 14, but also imparts movement to it in the direction from the inlet 16 towards the outlet 18.
The particulate material may reach the inlet 16 via a flexible linkage connected to a hopper or silo. Alternatively', the transport apparatus described may form an integral part of a powder feeding facility, for example by being bolted directly to a hopper. In this configuration, it may be advantageous to employ load cells, for example mounted on the hopper to monitor the loss of weight thereof as the powder is removed. Information from the load cells may then be used to control the feed rate of the powder, for example by varying the frequency and/or the amplitude of the vibrating mechanism.
The particulate material exiting through the outlet 18 may be directed to a mixing vat or kettle, or may be fed into an extruder, homogeniser or ball mill, or may be put into containers for storage and/or transport.
Claims (10)
1. Apparatus for transporting particulate material, comprising a porous member onto which the material is directed, means for directing gas upwards through the member to fluidise the material, and means for vibrating the member to effect transport of the fluidised material therealong.
2. Apparatus according to claim 1, wherein the porous member is planar and is disposed substantially horizontally.
3. Apparatus according to claim 1 or claim 2, comprising an upper compartment into which the particulate material is directed, and a lower compartment into which the gas is directed, wherein the two compartments are separated by the porous member.
4. Apparatus according to claim 3, of generally elongate configuration, wherein the upper compartment has an inlet at one end and an outlet at the other end, for allowing the material to pass through the apparatus.
5. Apparatus according to claim 3 or claim 4, wherein the upper compartment has a vent for the gas.
6. A method of transporting particulate material, comprising the steps of directing the material onto a porous member, directing gas upwards through the member to fluidise the material, and vibrating the member to transport the material therealong.
7. A method according to claim 6, wherein the material is transported substantially horizontally along the member.
8. A method according to claim 6 or claim 7, wherein the porous member is arranged to divide one compartment from another, and wherein the particulate material is directed into an upper one of the compartments, and the gas is directed into a lower one of the compartments.
9. Apparatus for transporting particulate material, substantially as hereinbefore described with reference to the accompanying drawings.
10. A method of transporting particulate material, substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9726350A GB2332186A (en) | 1997-12-13 | 1997-12-13 | Particle conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9726350A GB2332186A (en) | 1997-12-13 | 1997-12-13 | Particle conveyor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9726350D0 GB9726350D0 (en) | 1998-02-11 |
| GB2332186A true GB2332186A (en) | 1999-06-16 |
Family
ID=10823556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9726350A Withdrawn GB2332186A (en) | 1997-12-13 | 1997-12-13 | Particle conveyor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2332186A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765602A (en) * | 2012-07-06 | 2012-11-07 | 江苏泓明达机械有限公司 | Novel air conveying chute |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284041A (en) * | 2020-11-06 | 2021-01-29 | 福州大学 | Widened type vibration fluidized bed structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768174A (en) * | 1971-04-19 | 1973-10-30 | Escher Wyss Ag | Fluidised bed device |
| US4305210A (en) * | 1976-12-01 | 1981-12-15 | A/S Niro Atomizer | Apparatus for processing a powdered or particulate product |
| DE3337770A1 (en) * | 1982-11-04 | 1984-05-10 | A. Heinen GmbH Maschinenfabrik, 2930 Varel | Fluidised-bed drier |
| DE3825115C1 (en) * | 1988-07-23 | 1990-02-15 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De | Vibrating fluidised bed |
-
1997
- 1997-12-13 GB GB9726350A patent/GB2332186A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768174A (en) * | 1971-04-19 | 1973-10-30 | Escher Wyss Ag | Fluidised bed device |
| US4305210A (en) * | 1976-12-01 | 1981-12-15 | A/S Niro Atomizer | Apparatus for processing a powdered or particulate product |
| DE3337770A1 (en) * | 1982-11-04 | 1984-05-10 | A. Heinen GmbH Maschinenfabrik, 2930 Varel | Fluidised-bed drier |
| DE3825115C1 (en) * | 1988-07-23 | 1990-02-15 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De | Vibrating fluidised bed |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765602A (en) * | 2012-07-06 | 2012-11-07 | 江苏泓明达机械有限公司 | Novel air conveying chute |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9726350D0 (en) | 1998-02-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |