EP1346928A1 - Récipient de stockage pour produits en vrac, et utilisation d'un récipient de stockage de ce type - Google Patents

Récipient de stockage pour produits en vrac, et utilisation d'un récipient de stockage de ce type Download PDF

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Publication number
EP1346928A1
EP1346928A1 EP03075814A EP03075814A EP1346928A1 EP 1346928 A1 EP1346928 A1 EP 1346928A1 EP 03075814 A EP03075814 A EP 03075814A EP 03075814 A EP03075814 A EP 03075814A EP 1346928 A1 EP1346928 A1 EP 1346928A1
Authority
EP
European Patent Office
Prior art keywords
storage container
bulk material
drainage system
suction
suction means
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Withdrawn
Application number
EP03075814A
Other languages
German (de)
English (en)
Inventor
Lambert Arjen Van Wijk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LSE BV
Original Assignee
LSE BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LSE BV filed Critical LSE BV
Publication of EP1346928A1 publication Critical patent/EP1346928A1/fr
Withdrawn legal-status Critical Current

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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
    • B65D88/74—Large containers having means for heating, cooling, aerating or other conditioning of contents
    • B65D88/747—Large containers having means for heating, cooling, aerating or other conditioning of contents dehumidifying, dewatering or draining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/12—Drying solid materials or objects by processes not involving the application of heat by suction

Definitions

  • the present invention relates to a storage container for bulk material, such as a silo, the storage container comprising a drainage device with a drainage system provided at the bottom of the storage container.
  • Flue gas desulphurization gypsum is generally supplied in a slurry form and then has to be dried.
  • the conventional storage containers are for this reason often provided with a drying installation placed on top of the storage container.
  • the flue gas desulphurization gypsum is generally dried to a residual moisture content of 8 to 12%.
  • One factor in this is that beyond approximately 15% residual moisture, problems arise in the drying process through the fact that the flue gas desulphurization gypsum then starts to settle in layers. Therefore, the flue gas desulphurization gypsum in the storage container is still stored in a state which contains relatively high levels of moisture.
  • the worm screw ensures that bulk material is supplied to the central column. If the flue gas desulphurization gypsum returns to a very liquid form at the bottom of the bulk material container, as a result of the accumulation of moisture there, the effect occurs where this layer of liquid flue gas desulphurization gypsum will seek to flow outwards spontaneously, without the aid of the worm screw. It is known to solve this problem in the prior art by providing a drainage layer at the bottom of the bulk material container. This drainage generally comprises a layer of gravel with drainage lines therein. To prevent the layer of gravel or if appropriate another type of material for mixing with the bulk material, a cloth is also placed over this layer.
  • this object is achieved through the fact that the drainage system comprise suction means, which are connected to the drainage system, for generating a pressure reduction in the drainage system.
  • the suction means are provided with a time control for switching the suction means on and off at predetermined times. Energy can be saved by not operating the suction means continuously. In fact, it has been found that the actively sucking drainage becomes less effective after a certain time and that the drainage efficiency is initially higher if the suction means have been switched off for a certain time and then switched on again than is the case when the drainage means were first switched off.
  • the suction means are advantageously designed to generate a pressure reduction of at least approximately 0.5 mbar, more particularly a pressure reduction in the range from approximately 5 mbar, such as 10, 50, 150, 300, 500 or 700 mbar, in the drainage system.
  • a pressure reduction of at least approximately 0.5 mbar, more particularly a pressure reduction in the range from approximately 5 mbar, such as 10, 50, 150, 300, 500 or 700 mbar, in the drainage system.
  • the pressure reduction which is to be generated will be at most approximately 1000 mbar, in particular if it is used only for draining purposes. If the suction is to completely or partially replace the preliminary drying, higher pressure reductions may also be effective. This is because the applicant has found that even relatively slight suction forces of approximately 0.5 mbar make it possible to achieve results, and that very good results can be achieved at above approximately 5 mbar.
  • the suction means comprise a suction line which, at a suction port, is connected to a vertically orientated discharge pipe of the drainage system, which discharge pipe comprises a water seal on that side of the suction port which is remote from the drainage system.
  • the water seal makes it possible to ensure that the suction force exerted by the suction means is transmitted to the drainage system and not to the discharge side thereof, in which case, by way of example, air would be sucked out of the sewer or the environment.
  • the invention very particularly also relates to a storage container containing bulk material, and in particular a bulk material with a liquid capillary action.
  • a liquid capillary action is understood as meaning a capillary action which effects liquid, such as water.
  • the grain size of the bulk material is in this case in the range from 25 ⁇ m to approximately 500 ⁇ m, and is, for example, approximately 50 ⁇ m, as is the case with flue gas desulphurization gypsum.
  • the bulk material is in particular flue gas desulphurization gypsum.
  • the invention relates to the use of a storage container according to the invention for storing bulk material, in particular a bulk material as described in Claims 6, 7 or 8, in which case the bulk material can advantageously be dried in the storage container.
  • the invention relates to the use of a storage container according to the invention for drying a material to form a bulk material and storing the said bulk material, the material being introduced into the storage container and this material being dried in the storage container to form bulk material.
  • FIGS. 1 and 2 present highly diagrammatic illustrations of a storage container according to the invention.
  • the storage container comprises a silo 1 with a roof 2, a wall 3 and floor 4.
  • a disc column 6 With a worn screw 5 which can rotate around it and, moreover, can be vertically adjusted along the disc column 6.
  • a bulk material 7 is situated inside the silo 1.
  • the bulk material is moved towards the central disc column 6 in order to enter this column 6 via slots and to drop downwards via the column 6.
  • the bulk material can then be loaded into a lorry 12, for example, by means of a loading system 11.
  • the bulk material 7 is in this case in particular flue gas desulphurization gypsum, but could quite easily also be a different type of bulk material.
  • This drainage layer consists of gravel 10 with drainage lines 9 and 13 therein.
  • the gravel On the top side, the gravel is covered by means of a cloth 8.
  • the drainage layer is used to enable liquid, in particular water, to be discharged. In the bulk material, this liquid tends to sink downwards under the force of gravity and to accumulate at the bottom of the silo 1. Because a drainage system is now provided, the liquid which accumulates at the bottom of the silo can be discharged, specifically via line 14.
  • suction means 17 which, via a suction line 16, are connected at a suction port 15 to discharge line 14 in order to generate a pressure reduction in the drainage system 9, 13.
  • a water seal 18 is provided in the discharge line 14.
  • This water seal 18 comprises a U-shaped pipe in which water or at least liquid is left to stand.
  • suction force generated by the suction means is relatively low, and it is possible to make do with a suction force of the order of magnitude of 5 mbar to 50 mbar, liquid which stands in the water seal 18 will not be sucked out.
  • This test arrangement used a column with a height of 180 cm and a diameter of approximately 30 cm.
  • This column is filled with flue gas desulphurization gypsum with a residual moisture content of approximately 10%.
  • the bottom end of the column is open and positioned in a tray.
  • This tray is filled with water. It was found that this water is absorbed by the flue gas desulphurization gypsum in the column and is draw upwards into the column. The filling of the tray is continued until no further water was observed to be drawn up into the flue gas desulphurization gypsum.
  • suction was carried out for X1 hours, (Section A in Figure 3), followed by a break of many hours. Then, on the second day, suction was carried out uninterrupted for X2 hours (Section B in Figure 3), again followed by a break of many hours. On the third day, suction was again carried out uninterrupted for X3 hours (Section C in Figure 3).
  • the suction periods are shown in succession on the horizontal axis, with the breaks between them omitted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
EP03075814A 2002-03-20 2003-03-20 Récipient de stockage pour produits en vrac, et utilisation d'un récipient de stockage de ce type Withdrawn EP1346928A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1020211 2002-03-20
NL1020211A NL1020211C2 (nl) 2002-03-20 2002-03-20 Opslaghouder voor stortgoed alsmede gebruik van een dergelijke opslaghouder.

Publications (1)

Publication Number Publication Date
EP1346928A1 true EP1346928A1 (fr) 2003-09-24

Family

ID=27786078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03075814A Withdrawn EP1346928A1 (fr) 2002-03-20 2003-03-20 Récipient de stockage pour produits en vrac, et utilisation d'un récipient de stockage de ce type

Country Status (2)

Country Link
EP (1) EP1346928A1 (fr)
NL (1) NL1020211C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109627742A (zh) * 2018-11-29 2019-04-16 荣德铵家新型材料(福州)有限公司 一种烧结烟气脱硫灰制备聚氨酯板材的方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560141A (en) * 1948-06-21 1951-07-10 James F Tipps Means for cooling and drying grain and seed
DE2103961A1 (de) * 1971-01-28 1972-08-17 Meyer, Horst, 4401 Einen Entwässerungssilo
GB1503681A (en) * 1974-05-22 1978-03-15 Mitsubishi Heavy Ind Ltd Apparatus for removing liquid from a slurry
US4207684A (en) * 1978-05-01 1980-06-17 Stice J Daniel Crop drying apparatus utilizing solar energy
EP0126599A2 (fr) * 1983-05-12 1984-11-28 Sykes Pumps Limited Procédé pour réduire la teneur en eau d'une matière granuleuse, stockée en pile
EP0742037A2 (fr) * 1995-05-10 1996-11-13 Mitsubishi Jukogyo Kabushiki Kaisha Appareil de filtration de boue et système de désulfuration de fumées
EP0775512A1 (fr) * 1995-11-23 1997-05-28 Hollandsche Beton Groep N.V. Procédé pour enlever un liquide d'un mélange

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560141A (en) * 1948-06-21 1951-07-10 James F Tipps Means for cooling and drying grain and seed
DE2103961A1 (de) * 1971-01-28 1972-08-17 Meyer, Horst, 4401 Einen Entwässerungssilo
GB1503681A (en) * 1974-05-22 1978-03-15 Mitsubishi Heavy Ind Ltd Apparatus for removing liquid from a slurry
US4207684A (en) * 1978-05-01 1980-06-17 Stice J Daniel Crop drying apparatus utilizing solar energy
EP0126599A2 (fr) * 1983-05-12 1984-11-28 Sykes Pumps Limited Procédé pour réduire la teneur en eau d'une matière granuleuse, stockée en pile
EP0742037A2 (fr) * 1995-05-10 1996-11-13 Mitsubishi Jukogyo Kabushiki Kaisha Appareil de filtration de boue et système de désulfuration de fumées
EP0775512A1 (fr) * 1995-11-23 1997-05-28 Hollandsche Beton Groep N.V. Procédé pour enlever un liquide d'un mélange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109627742A (zh) * 2018-11-29 2019-04-16 荣德铵家新型材料(福州)有限公司 一种烧结烟气脱硫灰制备聚氨酯板材的方法
CN109627742B (zh) * 2018-11-29 2021-01-29 荣德铵家新型材料(福州)有限公司 一种烧结烟气脱硫灰制备聚氨酯板材的方法

Also Published As

Publication number Publication date
NL1020211C2 (nl) 2003-09-29
NL1020211A1 (nl) 2003-09-23

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