EP3894340A1 - Silo for bulk material - Google Patents
Silo for bulk materialInfo
- Publication number
- EP3894340A1 EP3894340A1 EP19816597.9A EP19816597A EP3894340A1 EP 3894340 A1 EP3894340 A1 EP 3894340A1 EP 19816597 A EP19816597 A EP 19816597A EP 3894340 A1 EP3894340 A1 EP 3894340A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silo
- storage area
- removal
- bulk material
- connecting pipe
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/26—Hoppers, i.e. containers having funnel-shaped discharge sections
- B65D88/28—Construction or shape of discharge section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/72—Fluidising devices
Definitions
- the invention relates to a silo for bulk material, in particular a silo for granular bulk material
- silos have to meet a number of framework conditions.
- aggregation in the bulk material, for example by clumping must be avoided since this prevents automatic emptying.
- all flow processes in the silo must be mastered in order to avoid damage to the structure as far as possible.
- a silo for bulk material is known from DE 34 40 833 A1.
- a silo for flour-like bulk material is known from EP 0 123 031 B1.
- the object of the invention is to provide an inexpensive and long-term stable silo for bulk material.
- the silo for bulk material according to the invention is cylindrical, a conical hood being arranged in the interior of the silo. There is a first storage area above the cone hood. The main volume of the bulk material is stored in this area. There is an extraction area below the cone hood. At least one first bulk material removal device is arranged in the removal area.
- the cylindrical silo in particular has a round cross section.
- the silo can also have an angular cross section, in particular a regular polyhedral cross section, for example a regular hexagonal or regular octagonal cross section.
- a first removal chamber is arranged in the removal area, the first removal chamber being connected to the first storage area via at least one first connecting tube.
- the first removal chamber and the at least one first connecting tube form a self-contained second storage area connected to the first storage area.
- the second storage area therefore naturally has at least one open connection to the first storage area.
- an opening to the outside for removing the bulk material can be made via the first removal device.
- Closed means that the volume of the connecting pipe and the first removal device fills with bulk goods, but the bulk goods cannot get into a space outside the connecting pipe or the first removal chamber. Closed therefore means that solids and gases are fed and discharged to the second storage area exclusively via the first removal device (or possibly further removal devices) and via the first storage area can be, whereby gases can be supplied exclusively via additional device, in particular for fluidization via fluidization devices.
- a filter in such an additional gas outlet can also be dispensed with, since such a gas outlet is dispensed with, which simplifies maintenance.
- the advantage is that in comparison to the cone filled with bulk material, there is no uncontrolled slipping.
- the volume of the connecting pipe and the first removal device is filled with bulk material does not mean that there are no air bubbles or cavities. Of course, the bulk material itself already has air in it. On the other hand, this proportion changes between the gaseous phase and the solid phase when the bulk material flows. The proportion of the gaseous phase increases, the density decreases. If the flow of the bulk material then comes to a standstill, the bulk material can compress again, so that a gas space is created above the bulk material. The volume is still considered filled.
- a tube in the sense of the invention is any elongated closed shape.
- a tube can be round or square, for example.
- the conical cover preferably has an inclination of at least 50 °, preferably of at least 55 °, particularly preferably of at least 60 °.
- the conical hood preferably has an inclination of at most 75 °, preferably at most 70 °, particularly preferably at most 65 °. If the inclination is too low, the bulk material cannot slide by itself, dead spaces are created. If the inclination is too strong, the unused volume under the cone cover becomes too large. So the silo has to be built higher, which means additional costs.
- the silo preferably has a diameter of 10 m to 50 m, more preferably 14 m to 35 m.
- the first removal chamber preferably has a volume of more than 1 m 3 .
- the first removal chamber preferably has a volume of less than 20 m 3 , more preferably less than 10 m 3 , more preferably less than 5 m 3 , particularly preferably less than 3 m 3 .
- the at least one first connecting tube has a maximum diameter of less than 1 m, preferably less than 0.6 m. The larger the diameter, the faster the bulk material can flow through, but the risk of uncontrolled movements of the bulk material also increases.
- the at least one first connecting tube has a minimum diameter of more than 0.1 m, preferably more than 0.4 m. If the diameter becomes too small, the amount of bulk material flowing through is too small.
- the maximum diameter is understood to mean the maximum distance between two points of the cross section, and in the case of a square thus the distance between two opposite corners. The maximum diameter can also be called a large diagonal.
- the silo has a plurality of connecting pipes, all connecting pipes and the first removal chamber forming a self-contained second storage area connected to the first storage area.
- a number of connecting pipes are arranged so that the connecting pipes on the conical cover have a distance between 3 m and 8 m, preferably a distance between 4 m and 7 m.
- 8 to 20 connecting pipes are common in a silo.
- the advantage of the invention thus increases with the diameter of the silo.
- the at least one first connecting pipe has a fluidization device.
- Air is particularly preferably introduced for fluidization.
- air is introduced over the entire length of the connecting pipe.
- a common density is between 1000 and 1200 kg / m 3 .
- the density of the solid is typically 2400 kg / m 3 and higher.
- the reduction is due to the air content in the bulk material.
- gas in particular air, is supplied. This typically reduces the density by an average of 25% due to the absorption of the gas.
- the connecting pipe with a fluidization device preferably has a gradient of 1 ° to 10 °, preferably 4 ° to 8 °, particularly preferably 6 °.
- the connecting pipe has a gradient of 50 ° to 70 °, particularly preferably of 58 ° to 62 °.
- a fluidization device can thus be dispensed with in particular.
- the first removal chamber has at least one first control valve for removing the bulk material from the first removal chamber.
- the first removal chamber preferably has 3 to 8, preferably 4 to 6 control valves in order to be able to operate a corresponding number of separate removal points individually.
- the silo has at least one first connecting pipe and at least one second connecting pipe, the at least one first connecting pipe having a first separating device and the at least one second connecting pipe having a second separating device.
- the separating devices are preferably arranged adjacent to or in the conical cover. The separation device serves in particular to separate the second storage area from the first storage area, for example for maintenance or service purposes, and thus to be able to empty it separately.
- the first removal chamber is arranged outside the axis of symmetry of the silo.
- the silo can have a second removal chamber.
- the second extraction chamber is the same according to the invention connected to the storage area like the first removal chamber.
- the first removal chamber and the second removal chamber can be arranged one above the other.
- the first removal chamber and the second removal chamber can be arranged next to one another.
- a first collecting pipe is arranged between the first connecting pipe and the first removal chamber.
- the second connecting pipe is preferably also connected to the first collecting pipe.
- the first manifold is preferably designed in the form of a circular section.
- the first removal chamber is connected to a first semi-circular collecting tube and the second removal chamber is connected to a second semi-circular collecting tube.
- the first storage area and the second storage area have a volume ratio of at least 1,000: 1, preferably 10,000: 1, more preferably 50,000: 1.
- the first storage area and the second storage area have a volume ratio of at most 5,000,000: 1, preferably 1,000,000: 1, more preferably 500,000: 1.
- the second storage area and the first connecting tube have a volume ratio of at least 1: 100, preferably 1:50, more preferably 1:10.
- the second bearing area and the first connecting tube have a volume ratio of at most 1: 1, preferably 1: 2, more preferably 1: 5.
- the conical hood 20 is arranged in the interior of the silo, above which the first storage area 30 results.
- the removal area 40 is arranged below.
- the first removal chamber 60 with the first connection area 30 connecting the first connection pipe 70 and the second connection pipe 80 are arranged.
- the first removal chamber 60, the first connecting pipe 70 and the second connecting pipe 80 form the second storage area 90. This is closed, so that no bulk material can penetrate into the remaining removal area 40.
- the first removal chamber 60 has a first removal device 50 and a second removal device 52.
- the first removal device 50 has a first control valve 110.
- the mass flow of bulk material is set via the first control valve 110 and is directed to the first extraction point connected to the first extraction device 50.
- the mass flow of bulk material is set via the second control valve 112 and is directed to the second removal point connected to the second removal device 52.
- the first connecting pipe 70 and the second connecting pipe 80 each have a fluidization device 100 in order to convey the bulk material from the first storage area 30 into the first removal chamber 60.
- the first connecting pipe 70 with the first separating device 120 can be separated from the first storage area 30 and the second connecting pipe 80 with the second separating device 122 can be separated from the first storage area 30 become.
- the second storage area 90 can thus be emptied and the work can thus be carried out.
- first separating device 120 and the second separating device 122 can also be used to spatially control the emptying of the first storage area 30.
- the cone cover 20 has a cone angle 130 of 60 °.
- the first connecting pipe 70 and the second connecting pipe 80 have a connecting pipe inclination of 6 °.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Storage Of Harvested Produce (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018221547.2A DE102018221547A1 (en) | 2018-12-12 | 2018-12-12 | Bulk silo |
PCT/EP2019/083368 WO2020120211A1 (en) | 2018-12-12 | 2019-12-03 | Silo for bulk material |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3894340A1 true EP3894340A1 (en) | 2021-10-20 |
Family
ID=68808332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19816597.9A Pending EP3894340A1 (en) | 2018-12-12 | 2019-12-03 | Silo for bulk material |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3894340A1 (en) |
DE (1) | DE102018221547A1 (en) |
WO (1) | WO2020120211A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE523766C (en) * | 1928-10-30 | 1931-04-27 | Wilhelm Hartmann | Device for filling and emptying grain silos |
DE2352455B2 (en) * | 1973-10-19 | 1978-07-13 | Portland-Zementwerke Heidelberg Ag, 6900 Heidelberg | Large-capacity silo for flour-like bulk goods |
US4138020A (en) * | 1977-05-13 | 1979-02-06 | Foster Wheeler Energy Corporation | Regeneration flow distribution device |
US4391528A (en) * | 1977-06-30 | 1983-07-05 | Ibau Hamburg Ingenieurgisillschaft Endustreibau Mbh | Silo system for mixing stored material |
DE3314329A1 (en) | 1983-04-20 | 1984-10-25 | Krupp Polysius Ag, 4720 Beckum | SILO FOR MULTIPLE SHEET MATERIAL |
US4566232A (en) | 1983-12-21 | 1986-01-28 | Ibau Barcelona, S.A. | Large volume silo for bulk material, particularly raw cement powder |
DE3440833A1 (en) | 1984-11-08 | 1986-06-05 | Ibau Hamburg Ingenieurgesellschaft Industriebau Mbh, 2000 Hamburg | Hopper for bulk materials, in particular cement raw meal |
US6238145B1 (en) | 1996-04-15 | 2001-05-29 | Fuller Bulk Handling Corp. | Silo with dense phase discharge |
-
2018
- 2018-12-12 DE DE102018221547.2A patent/DE102018221547A1/en active Pending
-
2019
- 2019-12-03 EP EP19816597.9A patent/EP3894340A1/en active Pending
- 2019-12-03 WO PCT/EP2019/083368 patent/WO2020120211A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE102018221547A1 (en) | 2020-06-18 |
WO2020120211A1 (en) | 2020-06-18 |
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Legal Events
Date | Code | Title | Description |
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Effective date: 20220707 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: THYSSENKRUPP AG Owner name: THYSSENKRUPP POLYSIUS GMBH |