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WO2007128813A1 - Procédé et dispositif pour assurer la fluidité et le refroidissement de matières fluides contenant du nitrate d'ammonium - Google Patents

Procédé et dispositif pour assurer la fluidité et le refroidissement de matières fluides contenant du nitrate d'ammonium Download PDF

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Publication number
WO2007128813A1
WO2007128813A1 PCT/EP2007/054427 EP2007054427W WO2007128813A1 WO 2007128813 A1 WO2007128813 A1 WO 2007128813A1 EP 2007054427 W EP2007054427 W EP 2007054427W WO 2007128813 A1 WO2007128813 A1 WO 2007128813A1
Authority
WO
WIPO (PCT)
Prior art keywords
ammonium nitrate
inert gas
gas
flowable
cooling
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.)
Ceased
Application number
PCT/EP2007/054427
Other languages
German (de)
English (en)
Inventor
Lorenz Rödiger
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP07728880A priority Critical patent/EP2021678A1/fr
Publication of WO2007128813A1 publication Critical patent/WO2007128813A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying

Definitions

  • the invention relates to a method and a device for securing the free flowability and cooling of flowable, ammonium nitrate-containing materials during transport, during storage and in the promotion of materials through tubular and / or tubular conduits in and out of containers.
  • ammonium nitrate in pure form represents a largely safe to handle property
  • Verunreini ⁇ tions and local strong temperature increases by friction in mechanical delivery methods can lead to dangerous situations.
  • the patent DE 69108181 a coating of ammonium nitrate particles with talc or clay or orga ⁇ African "crystal habit modifiers" such as alkyl naphthalenesulfonate called.
  • the patent DE 10332729 describes the addition of anti-caking agents such as silica or certain metal hydroxides or hydroxy salts.
  • the disadvantage here is that each additive and the explosive properties ⁇ change of ammonium nitrate.
  • ammonium nitrate prills are adversely affected not only by mechanical stress and moisture, but also by changes in crystal structure coupled with a change in specific volume.
  • a disturbing transformation point of allotropic modifications in this respect is already at 32 ° C.
  • the described disadvantages also relate to the storage and delivery of a so-called flowable ammonium nitrate-containing matrix, which is used for the production of emulsion explosives.
  • the invention has for its object to reliably prevent a change in the original nature of the particles during transporting, storage and conveying by a recording of moisture from the surrounding ⁇ effectively prevented the air and thus a change in the free flow, bridging the Storage and unloading of transport or storage containers and a change in the morphological properties of the particles is excluded, and to achieve a cooling of the filling.
  • the method for ensuring the free flowability and cooling of granular, ammonium nitrate-containing materials during transport, storage and in the promotion of materials through tubular conduits in and out of containers characterized in that the flowable, ammonium nitrate-containing materials in a dry and cold Inert gas phase transported in a closed system, stored and promoted and / or cooled.
  • Filling, transport, storage or cooling are carried out by flowing the flowable material with the dry and cold inert gas, which is obtained from liquefied inert gas.
  • These gases are absolutely dry and cool due to the enthalpy of vaporization. They are therefore also able to cool the flowable material and a to absorb any residual moisture quickly. There is no change in the surface structure, which could cause increased abrasion and thus an increase in the fine grain content during filling and transport.
  • the device for securing the free flowability and cooling of flowable ammonium nitrate-containing materials comprises a Inertgasbevorrungungsaku containing an inert gas and an evaporator, and gas lines, starting from the evaporator with the silo and a silo vehicle can be connected.
  • the inert gas is obtained from liquefied inert gas by relaxation and introduced into the closed system containing the flowable, ammonium nitrate-containing materials.
  • the flowable for example, granular ammonium nitrate- containing material with the inert gas, for example, with dry nitrogen
  • a further embodiment provides that in the CLOSED ⁇ Senen system, the inert gas atmosphere is maintained mbar under a positive pressure level between 30 and 450 so that no air can penetrate and moisture from the surrounding atmosphere.
  • a further embodiment provides that the gas obtained from the ver ⁇ liquid inert gas by relaxation is used to lower the temperature to below 32 0 C in the closed system.
  • this is possible at any time if, due to the external temperature temperature conditions indicates heating of the silos or containers.
  • an effective cooling can be achieved according to the invention by introducing, for example, nitrogen or carbon dioxide, which originates from the evaporation of the liquefied gases. A structural change by passing through the transition point or by the influence of moisture is thus prevented, and there is no quality Minde ⁇ a tion.
  • a development of the invention provides that the gas obtained from the liquefied inert gas by expansion can also be used as a delivery medium of the flowable, ammonium nitrate-containing material.
  • liquid ⁇ gas storage unit As can be readily from the liquid ⁇ gas storage unit is a gas gain at a pressure that is sufficient for the promotion of the granular material. At the same time, the temperature of the granular material can be kept below 32 0 C.
  • a further embodiment provides that incorporated as the liquid inert gas is nitrogen, carbon dioxide and / or noble gases ⁇ be set, wherein, in particular, nitrogen has been found to be very advantageous.
  • ammonium nitrate prills are kept in an anhydrous inert gas atmosphere during transport, transport and storage, which is produced by evaporation of liquid nitrogen directly at the place of use.
  • carbon dioxide or argon can be used alone or in mixtures with one another or with nitrogen.
  • the gas obtained by vaporizing the liquefied inert gas is free of moisture and has its own gas pressure without mecha ⁇ African aids such as pumps or compressors.
  • the gases are also able to cool the ammonium nitrate-containing materials such as prills.
  • ammonium nitrate prills that have a far ⁇ consistently homogeneous particle size, in the storage silo through pipes not done as an air / solid dispersion in a so-called air support but due to the uniform shape and maintaining the smooth surface as a sealant promotion , In addition to gentle transport, this also means a considerable saving in gas as a transport medium.
  • Maintaining the surface morphology and fine structure of the prills is friendly not only for this material ⁇ delivery method important, but also for the explosive properties of resulting safety explosives.
  • the achieved low bulk density of the prills is considered as a measure of the quality prill.
  • a change in this bulk density through the formation of fine dust during transhipment, transport and storage means a significant loss of quality.
  • the inventive method of using inert liquefied gases, primarily nitrogen, the exclusion of moisture and atmospheric oxygen, the elimination of residual moisture, maintaining a temperature below the transformation point at 32 0 C and a gentle promotion without mechanical aids for ammonium nitrate prills and Emulsion explosives allows.
  • the process can also be applied to the promotion of the matrix of emulsion explosive mixtures and / or ammonium nitrate prills soaked in fuel oil, the so-called ANFO explosives (Ammonium Nitrate Fuel OiI), into high silos or other storage containers without mechanical pumps by means of the gas pressure of the inert gas , After completion of the filling process no material remains in the delivery line, which solidify and could lead to dangerously high pressures during the next filling process.
  • ANFO explosives Ammonium Nitrate Fuel OiI
  • the ammonium nitrate prills are loaded at the manufacturer directly into silo vehicles / silo containers, which are designed as pressure vessels.
  • silo vehicles / silo containers which are designed as pressure vessels.
  • the pressure vessel is charged after loading with approximately 450 mbar of nitrogen.
  • the liquefied nitrogen gas is cool and absolutely dry.
  • the solids properties of the prills are preserved on the transport route, thus enabling so-called dense phase conveying.
  • a Dünnstrom for example, a flight promotion with a gas velocity of 20 to 40 m / s
  • the conveying speed is lowered so far that the ammonium nitrate prills completely precipitate from the conveying gas and thus a high degree of filling of the line is achieved.
  • the gas velocity is reduced to 3 to 10 m / s. This low speed leads to a protection of the prills, avoiding the formation of fine grain and tube wear.
  • the specific amount of conveying gas is reduced.
  • the silo is subjected to a slight overpressure of the nitrogen to prevent the ingress of atmospheric moisture and to maintain the quality of the prills during storage.
  • a preventive temperature of 32 0 C is also the silo container thermally insulated and provided with a reflecting the heat radiation to a high gloss polished stainless steel outer skin.
  • Fig. 1 is a flow diagram of the device according to the invention.
  • the flow scheme of the device according to Inventive ⁇ shown in Fig. 1 shows a placed on a steel frame 4 Silo 1.
  • a Silokopf 2 has inputs and outputs for a Entstaubungs für 5 and a feed pipe 8 and a gas outlet 3.
  • About the Entustaubungs für 5 and a filter 6 is a disposal possibly occurring during filling or filling dusts.
  • a connection is made via a line part 7.1 of the gas line 7 and hereby establishes a connection with the dedusting line 5 ago.
  • Line part 7.3 of the gas line 7 which opens into a cold gas inlet 14.
  • the cold gas inlet 14 is arranged in the region of an emptying 15 below a filling cone 16 of the silo 1.
  • Another line part 7.3 of the gas line 7 is connected to a gas hose 17 with a silo vehicle 13 to be emptied.
  • the silo vehicle 13 is interconnected via a delivery hose 9 with the delivery line 8.
  • the liquefied gas in this case liquid nitrogen, passes into the gas phase.
  • Pressure regulator is used to set the required pressure.
  • a combination of different valves ensures that there is a gas pressure at the various delivery points on the line parts 7.1, 7.2 and 7.3, which is required for the respective intended use.
  • the pressure building up in the line part 7.2 of the gas line 7 is so high that pressure is exerted on the silane content of the silo vehicle 13 via the gas hose 17 and the ammonium nitrate-containing material is conveyed into the conveying line 8 and then into the silo 1 via the conveying hose 9.
  • the pressure regulated in the line section 7.3 of the gas line 7 allows to carry out a cooling of the contents of the silo 1 during storage, in which cold gas is passed through the filling cone 16 into the filling.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour assurer la fluidité et le refroidissement de matières granuleuses contenant du nitrate d'ammonium lors de leur transport, de leur stockage et lorsqu'elles sont acheminées par des conduits tubulaires dans des conteneurs et hors de conteneurs. Selon l'invention, les matières fluides contenant du nitrate d'ammonium sont transportées, stockées et acheminées et/ou refroidies dans un système fermé en phase gazeuse inerte sèche et froide.
PCT/EP2007/054427 2006-05-08 2007-05-08 Procédé et dispositif pour assurer la fluidité et le refroidissement de matières fluides contenant du nitrate d'ammonium Ceased WO2007128813A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07728880A EP2021678A1 (fr) 2006-05-08 2007-05-08 Procede et dispositif pour assurer la fluidite et le refroidissement de matieres fluides contenant du nitrate d'ammonium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006022035.8 2006-05-08
DE200610022035 DE102006022035A1 (de) 2006-05-08 2006-05-08 Verfahren und Vorrichtung zur Sicherung der freien Fließfähigkeit und Kühlung von fließfähigen, ammoniumnitrathaltigen Materialien

Publications (1)

Publication Number Publication Date
WO2007128813A1 true WO2007128813A1 (fr) 2007-11-15

Family

ID=38474207

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/054427 Ceased WO2007128813A1 (fr) 2006-05-08 2007-05-08 Procédé et dispositif pour assurer la fluidité et le refroidissement de matières fluides contenant du nitrate d'ammonium

Country Status (3)

Country Link
EP (1) EP2021678A1 (fr)
DE (1) DE102006022035A1 (fr)
WO (1) WO2007128813A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019199279A1 (fr) * 2018-04-10 2019-10-17 Los Angeles Biomedical Research Institute At Harbor-Ucla Medical Center Procédés de traitement pour infections de candida auris

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921497A (en) * 1972-09-01 1975-11-25 Dynamit Nobel Ag Method of filling aquiferous boreholes with explosives
GB2018587A (en) * 1978-01-31 1979-10-24 Boc Ltd Method and apparatus for storage and transport
DE2911148A1 (de) * 1979-03-21 1980-09-25 Vni Gorno Metall I Cvetnych Me Einrichtung zum pneumatischen laden von spreng- und bohrloechern mit schuettfaehigen sprengstoffen
DE3526879A1 (de) * 1985-07-26 1987-02-05 Helfried Maechling Verfahren und vorrichtung zum unterbinden von braenden bzw. explosionen bzw. des ablaufs unerwuenschter reaktionen bei luftzutritt von in einem abgegrenzten volumen befindlichen guetern, insbesondere von in tanksattel- bzw. silozuegen zu transportierendem treibstoff bzw. zu transportierenden chemischen produkten
WO1997027135A1 (fr) * 1996-01-22 1997-07-31 Comalco Aluminium Limited Transport de phase dense

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307253A (en) * 1940-10-22 1943-01-05 Claude R Wickard Process for the production of noncaking fertilizer materials
US2399717A (en) * 1941-11-01 1946-05-07 Standard Oil Co Production of dust coated materials
US2644769A (en) * 1948-12-31 1953-07-07 Phillips Petroleum Co Coating of ammonium nitrate fertilizer
NL104137C (fr) * 1957-02-14
US3027267A (en) * 1957-10-03 1962-03-27 Phillips Petroleum Co Process for drying granular coated ammonium nitrate
US3223478A (en) * 1962-05-09 1965-12-14 Phillips Petroleum Co Storage stability of ammonium nitrate
US3379496A (en) * 1965-10-08 1968-04-23 Chemical & Ind Corp High density ammonium nitrate granules
US4001378A (en) * 1973-12-03 1977-01-04 Petrochemicals Company, Inc. Anti-caking of nitrogenous materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921497A (en) * 1972-09-01 1975-11-25 Dynamit Nobel Ag Method of filling aquiferous boreholes with explosives
GB2018587A (en) * 1978-01-31 1979-10-24 Boc Ltd Method and apparatus for storage and transport
DE2911148A1 (de) * 1979-03-21 1980-09-25 Vni Gorno Metall I Cvetnych Me Einrichtung zum pneumatischen laden von spreng- und bohrloechern mit schuettfaehigen sprengstoffen
DE3526879A1 (de) * 1985-07-26 1987-02-05 Helfried Maechling Verfahren und vorrichtung zum unterbinden von braenden bzw. explosionen bzw. des ablaufs unerwuenschter reaktionen bei luftzutritt von in einem abgegrenzten volumen befindlichen guetern, insbesondere von in tanksattel- bzw. silozuegen zu transportierendem treibstoff bzw. zu transportierenden chemischen produkten
WO1997027135A1 (fr) * 1996-01-22 1997-07-31 Comalco Aluminium Limited Transport de phase dense

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019199279A1 (fr) * 2018-04-10 2019-10-17 Los Angeles Biomedical Research Institute At Harbor-Ucla Medical Center Procédés de traitement pour infections de candida auris

Also Published As

Publication number Publication date
EP2021678A1 (fr) 2009-02-11
DE102006022035A1 (de) 2007-11-15

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