EP0436140A1 - Procédé et dispositif de refroidissement d'une substance pulvérulente - Google Patents

Procédé et dispositif de refroidissement d'une substance pulvérulente Download PDF

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Publication number
EP0436140A1
EP0436140A1 EP90123424A EP90123424A EP0436140A1 EP 0436140 A1 EP0436140 A1 EP 0436140A1 EP 90123424 A EP90123424 A EP 90123424A EP 90123424 A EP90123424 A EP 90123424A EP 0436140 A1 EP0436140 A1 EP 0436140A1
Authority
EP
European Patent Office
Prior art keywords
baffle plate
cooling liquid
cooling
filler neck
carrying
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
Application number
EP90123424A
Other languages
German (de)
English (en)
Other versions
EP0436140B1 (fr
Inventor
Peter Schmidt
Franz Kretzschmar
Willi Kawaters
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Priority to AT90123424T priority Critical patent/ATE102701T1/de
Publication of EP0436140A1 publication Critical patent/EP0436140A1/fr
Application granted granted Critical
Publication of EP0436140B1 publication Critical patent/EP0436140B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • F28C3/14—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material moving by gravity, e.g. down a tube

Definitions

  • the invention relates to a method for cooling a powdery substance, which is filled as a powder jet through a nozzle into a container and sprayed with a cooling liquid for cooling, and a device for carrying out the method.
  • DE-OS 36 23 724 discloses a method and a device for producing fresh concrete using cement which is precooled by liquid nitrogen. The cement is cooled when the cement is fed into a storage silo. For this purpose, the liquid nitrogen is blown into the cement silo at the same time as the cement. The connections for cement and nitrogen are arranged adjacent in the upper silo area.
  • the invention has for its object to provide a method and an apparatus for cooling a powdery substance, which is filled as a powder jet through a nozzle in a container and sprayed with a cooling liquid for cooling, which meet the requirements described above, in particular an increased heat exchange ensure between the powdery substance and the cooling liquid.
  • This object is achieved in that the powder jet before contact with the cooling liquid introduced via a distribution device is dispersed by mechanical fittings over a larger cross section than the filler neck.
  • the essential feature of the invention is that a baffle plate is placed below the powder filler neck in the powder stream of the powder to be cooled. When hitting this baffle plate, the powder jet is torn, whereby the powder forms a finely distributed baffle flow and an effective contact surface for heat exchange with the coolant is achieved.
  • Another advantage is that the temperature distribution in the container is much more homogeneous than can be achieved according to the prior art. The above-mentioned sufficient cooling can also be achieved with a lower cooling liquid throughput, and it can also be far surpassed if necessary.
  • the invention can be applied to a wide variety of powdery substances.
  • One example is the cement mentioned above in the course of the production of concrete, which is of particular importance because of its widespread use in building construction and civil engineering.
  • the use of liquid nitrogen as a coolant is recommended, since nitrogen does not leave any residues, but evaporates and degasses 100 percent.
  • the invention can be used with the same success, for example in the production of milk powder and plastic granules, and in particular in the grinding of spices which, for. T. are very temperature sensitive, use.
  • a great advantage of the invention is that it can be easily installed in a conventional cooling device for powdery substances which are fed into a container.
  • the filler neck one
  • Such a conventional cooling device can be arranged decentrally or centrally in the upper container area in the container.
  • the decentralized arrangement is characterized by a flat baffle plate arranged obliquely below the outlet openings of the powder filler neck, which is attached to the powder filler neck with brackets at an angle between approximately 30 ° and approximately 75 ° to the direction of the powder fall.
  • a liquid distribution device in the form of a straight distribution screen provided on its underside with numerous outlet openings for the liquid coolant is attached in such a way that the coolant emerging from it sprinkles the impingement stream widely and thus brings about the desired cooling.
  • a blunt baffle cone with brackets is fastened to it below the powder filler neck, which is arranged centrally in the upper container area, in such a way that the axis of the filler neck points to the cone tip pointing upward.
  • the liquid nitrogen is added via a ring line provided on its underside with numerous outlet openings for the liquid coolant as a distribution rake to the truncated cone-shaped impingement flow of the powder which is formed by the cone.
  • the baffle plate is fastened to the powder filler neck with brackets.
  • a separate fastening of the baffle plate is also conceivable. It is essential for the described method that the powdery substance fed into the container from above through the powder filler neck hits the baffle plate mounted underneath the filler neck and that the powdery substance bouncing off it flows below the coolant distribution rake so that it flows through the outlet openings of the distribution rake Coolant sprayed onto the powdery substance produces an effective thermal contact with it. A particularly effective thermal contact results if the cross section of the sprayed impingement flow is enlarged compared to the cross section of the powder flow in the powder filler neck.
  • FIG. 1 shows a device for cooling a powdery substance (symbolized by arrows) in a decentralized arrangement.
  • Figure 1, I shows a side view
  • Figure 1, II a top view.
  • the powder to be cooled passes through a powder filler neck 1 into a container (not shown), where it hits a flat, obliquely positioned baffle plate 2a and bounces off it again.
  • the coolant flows from a feed line 3 into a straight distribution rake 4a, which has numerous outlet openings for the coolant on its underside, and is sprayed onto the baffle flow of the powder generated by the baffle plate 2a in order to achieve the desired cooling of the powder.
  • the baffle plate 2a is fastened to the powder filler neck 1 with brackets 5.
  • FIG. 2 shows an alternative form of arrangement of a device for cooling powdery substances, namely a central one, FIG. 2, I again representing the side view of FIG. 2, II (top view).
  • the same or comparable device parts are provided with the same reference numerals as in FIG. 1.
  • the powder (arrows) fed through the filler neck 1 into the container (not shown) meets the conical baffle plate 2b and is thereby widened to form a frustoconical baffle flow.
  • the coolant is fed via the feed line 3 into a ring line 4b provided on its underside with numerous outlet openings for the coolant, which serves as a distribution screen for spraying the coolant onto the impingement flow and thus achieves the necessary cooling.
  • the brackets 5 fix the impact cone 2b below the filler neck 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP90123424A 1989-12-14 1990-12-06 Procédé et dispositif de refroidissement d'une substance pulvérulente Expired - Lifetime EP0436140B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90123424T ATE102701T1 (de) 1989-12-14 1990-12-06 Verfahren und vorrichtung zur kuehlung einer pulverfoermigen substanz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3941262 1989-12-14
DE3941262A DE3941262C1 (fr) 1989-12-14 1989-12-14

Publications (2)

Publication Number Publication Date
EP0436140A1 true EP0436140A1 (fr) 1991-07-10
EP0436140B1 EP0436140B1 (fr) 1994-03-09

Family

ID=6395436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123424A Expired - Lifetime EP0436140B1 (fr) 1989-12-14 1990-12-06 Procédé et dispositif de refroidissement d'une substance pulvérulente

Country Status (3)

Country Link
EP (1) EP0436140B1 (fr)
AT (1) ATE102701T1 (fr)
DE (2) DE3941262C1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040674A1 (fr) 2006-10-04 2008-04-10 Messer Group Gmbh Procédé et dispositif de fabrication de béton frais refroidi
CN102774669A (zh) * 2011-05-11 2012-11-14 贵州航天凯山特种车改装有限公司 粉粒物料运输气动卸料车主进气管冷却装置
CN105775795A (zh) * 2016-03-28 2016-07-20 重庆钢铁(集团)有限责任公司 一种可提升烧结制粒效果的返矿喷淋***
AT522559A1 (de) * 2019-04-25 2020-11-15 Thomas Wallner Dipl Ing Fh Verfahren zum Regulieren der Aggregattemperatur beim Herstellen von Beton
DE102021005339A1 (de) 2021-10-27 2023-04-27 Messer Austria Gmbh Verfahren und Vorrichtung zur Herstellung von gekühltem Frischbeton
DE102021005340A1 (de) 2021-10-27 2023-04-27 Messer Austria Gmbh Vorrichtung und Verfahren zur Herstellung von gekühltem Frischbeton
DE102021005338A1 (de) 2021-10-27 2023-04-27 Messer Austria Gmbh Vorrichtung zur Herstellung von gekühltem Frischbeton

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100410613C (zh) * 2001-07-05 2008-08-13 特诺颜料国际有限公司 用于直接冷却微粒固体的方法和装置
DE102005037081A1 (de) * 2005-08-03 2007-02-08 Messer Group Gmbh Verfahren und Vorrichtung zum Kühlen von Zement oder zementartigen Pulvern
US20180252444A1 (en) * 2017-03-06 2018-09-06 Mandak Holdings, LLC Cooling system and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2727734A (en) * 1951-06-14 1955-12-20 Johnson Co C S Method of and apparatus for cooling concrete aggregates
US3330046A (en) * 1962-03-22 1967-07-11 Smidth & Co As F L Method and apparatus for exchanging heat between solid particles and gases
US3358976A (en) * 1965-03-15 1967-12-19 Conrad Y Siktberg Apparatus for heating concrete ingredients
FR2281815A1 (fr) * 1974-08-14 1976-03-12 Messer Griesheim Gmbh Procede de refroidissement de beton
EP0013871A1 (fr) * 1979-01-30 1980-08-06 VOEST-ALPINE Aktiengesellschaft Procédé et dispositif pour le refroidissement de matières calcinées comme les matières frittées ou les pellets
DE3316030A1 (de) * 1983-05-03 1984-11-08 Adolf 2720 Rotenburg Biere Verfahren und vorrichtung zur befeuchtung von koernigem oder pulverfoermigen streugut

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1911965A1 (de) * 1968-03-13 1969-11-06 Prerovske Strojirny Np Vorrichtung zum Vorwaermen von pulverfoermigen Materialien,insbesondere von Zementrohmehl
DE3623724A1 (de) * 1986-07-14 1988-01-28 Held & Francke Bau Ag Verfahren und vorrichtung zum herstellen von frischbeton unter verwendung von durch fluessigen stickstoff gekuehltem zement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2727734A (en) * 1951-06-14 1955-12-20 Johnson Co C S Method of and apparatus for cooling concrete aggregates
US3330046A (en) * 1962-03-22 1967-07-11 Smidth & Co As F L Method and apparatus for exchanging heat between solid particles and gases
US3358976A (en) * 1965-03-15 1967-12-19 Conrad Y Siktberg Apparatus for heating concrete ingredients
FR2281815A1 (fr) * 1974-08-14 1976-03-12 Messer Griesheim Gmbh Procede de refroidissement de beton
EP0013871A1 (fr) * 1979-01-30 1980-08-06 VOEST-ALPINE Aktiengesellschaft Procédé et dispositif pour le refroidissement de matières calcinées comme les matières frittées ou les pellets
DE3316030A1 (de) * 1983-05-03 1984-11-08 Adolf 2720 Rotenburg Biere Verfahren und vorrichtung zur befeuchtung von koernigem oder pulverfoermigen streugut

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040674A1 (fr) 2006-10-04 2008-04-10 Messer Group Gmbh Procédé et dispositif de fabrication de béton frais refroidi
EP2077933B1 (fr) * 2006-10-04 2012-02-01 Messer Group GmbH Procédé et dispositif de fabrication de béton frais refroidi
CN102774669A (zh) * 2011-05-11 2012-11-14 贵州航天凯山特种车改装有限公司 粉粒物料运输气动卸料车主进气管冷却装置
CN105775795A (zh) * 2016-03-28 2016-07-20 重庆钢铁(集团)有限责任公司 一种可提升烧结制粒效果的返矿喷淋***
CN105775795B (zh) * 2016-03-28 2017-10-31 重庆钢铁(集团)有限责任公司 一种可提升烧结制粒效果的返矿喷淋***
AT522559A1 (de) * 2019-04-25 2020-11-15 Thomas Wallner Dipl Ing Fh Verfahren zum Regulieren der Aggregattemperatur beim Herstellen von Beton
AT522559B1 (de) * 2019-04-25 2022-10-15 Thomas Wallner Dipl Ing Fh Verfahren zum Regulieren der Aggregattemperatur beim Herstellen von Beton
DE102021005339A1 (de) 2021-10-27 2023-04-27 Messer Austria Gmbh Verfahren und Vorrichtung zur Herstellung von gekühltem Frischbeton
DE102021005340A1 (de) 2021-10-27 2023-04-27 Messer Austria Gmbh Vorrichtung und Verfahren zur Herstellung von gekühltem Frischbeton
DE102021005338A1 (de) 2021-10-27 2023-04-27 Messer Austria Gmbh Vorrichtung zur Herstellung von gekühltem Frischbeton
EP4173791A1 (fr) 2021-10-27 2023-05-03 Messer SE & Co. KGaA Dispositif et procédé de fabrication de béton frais refroidi
EP4173790A1 (fr) 2021-10-27 2023-05-03 Messer SE & Co. KGaA Dispositif de fabrication de béton frais refroidi
EP4173789A1 (fr) 2021-10-27 2023-05-03 Messer SE & Co. KGaA Procédé et dispositif de fabrication de béton frais refroidi

Also Published As

Publication number Publication date
ATE102701T1 (de) 1994-03-15
EP0436140B1 (fr) 1994-03-09
DE3941262C1 (fr) 1991-08-01
DE59004918D1 (de) 1994-04-14

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