EP0209580A1 - Dispositif et procede de broyage pneumatique - Google Patents

Dispositif et procede de broyage pneumatique

Info

Publication number
EP0209580A1
EP0209580A1 EP86900979A EP86900979A EP0209580A1 EP 0209580 A1 EP0209580 A1 EP 0209580A1 EP 86900979 A EP86900979 A EP 86900979A EP 86900979 A EP86900979 A EP 86900979A EP 0209580 A1 EP0209580 A1 EP 0209580A1
Authority
EP
European Patent Office
Prior art keywords
fan
housing
comminutor
inlet
sleeve
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Withdrawn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
EP86900979A
Other languages
German (de)
English (en)
Inventor
Allen C. Wiley
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.)
CP COAL MILLS Inc
Original Assignee
CP COAL MILLS Inc
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 CP COAL MILLS Inc filed Critical CP COAL MILLS Inc
Publication of EP0209580A1 publication Critical patent/EP0209580A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/0012—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
    • B02C19/005—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain) the materials to be pulverised being disintegrated by collision of, or friction between, the material particles

Definitions

  • This invention relates to a means and method of comminuting materials/ in particular/ a means and method of pneumatically comminuting various materials.
  • Micronized coal burns more efficiently than lump coal.
  • Micronized coal is lump coal which is disintegrated to micron sized particles.
  • Micronized coal also provides for easier handling/ more efficient/ complete and controllable combustion/ and an opportunity to reduce particulate emissions.
  • a micronized coal particle has a larger surface per unit volume/ thereby increasing the burning rate.
  • Micronized coal burns much like a No. 2 oil/ suggesting that retrofitting can be accomplished by replacement of the oil or gas burner with a coal burner/ and derating of a furnace is unnecessary. Further develop- ment of techniques for combustion systems using micronized coal and applications of these techniques to industrial size furnaces is in process.
  • Micronized coal of the size between 5 micrometers (um) and 30 um is more advantageous than the particles produced by conventional pulverizers where particle sizes range from 50 to 150 um.
  • the centrifugal comminutor of this invention will efficiently and economically produce coal particles between 5 um and 30 um in diameter.
  • the surface area per unit weight has become a standard for characterizing cement quality. Acceptable fineness is around 3/200 to 4,200 cm 2 per gram (cm2/gm) of cement.
  • This measurement/ known as Blaine Surface Measurement/ is made by measuring the pressure drop which results from the flow of air through a standard packed bed of cement.
  • comminution is utilized on a signifi- cant scale for many other commodities including/ but not limited to the following: aluminum/ arsenic/ asbestos/ barite, boron/ calcium/ ceramics/ chromium/ clays/ copper/ diatomite/ feldspar / fluorspar, golds/ grain/ gypsum/ iron ore/ lead/ lithium/ magnesium/ manganese/ mercury/ mica, molybdenum, nickel/ perlite/ phosphate/ potassium/ pumice, rare earth/ sand and gravel/ salts/ silicon/ silver/ a stone/ chalk/ titanium/ tungsten/ uranium/ vermiculite/ and zinc. It is estimated that the energy used for comminution of these materials approaches 30 billion kilowatt hours per year.
  • the present invention represents a significant improvement over the above mentioned conventional comminutors as it utilizes pneumatics and particle-to- particle attrition for both transport of the material and comminution of the material/ respectively.
  • Coal rate controller 60 can be a computerized mechanism having sensors of rates of flow which can compare said rates to predetermined values for furnace 12 output/ and/ of course/ can consist of manual controls. Such coal rate controllers are known in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

Appareil et procédé de broyage pneumatique de matériaux. Les appareils connus pour broyer pneumatiquement un matériau demandent beaucoup d'énergie et sont inefficaces. Ces problèmes sont résolus par l'appareil de broyage pneumatique (10) de l'invention, lequel comprend: une enceinte (16) contenant un ventilateur (14) connecté de manière opérative à un moteur (22), l'enceinte (16) ayant une ouverture d'admission (28) alignée avec un axe du ventilateur (14) et une ouverture de sortie (42) prévue sur le périmètre de l'enceinte (16); un conduit d'admission (30) monté sur l'enceinte (16); un conduit d'admission (30) monté sur l'enceinte (16) et entourant l'ouverture d'entrée (28), le conduit d'admission (30) comprenant une section de forme tronconique adjacente à l'enceinte; et un conduit de sortie (44) fixé à l'enceinte et entourant l'ouverture de sortie (42). Le matériau à triturer est introduit dans le conduit d'admission (30) et est aspiré dans la section de forme tronconique par l'aspiration produite par le ventilateur (14). Le matériau est trituré dans le conduit d'admission (30) dans une zone d'impact par rotation qui se trouve directement sous le ventilateur (14), après quoi le matériau est aspiré au travers du ventilateur (14) et sort par la conduite de sortie (44) de force par la pression produite par le ventilateur (14).
EP86900979A 1985-01-31 1986-01-21 Dispositif et procede de broyage pneumatique Withdrawn EP0209580A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69704285A 1985-01-31 1985-01-31
US697042 1996-08-19

Publications (1)

Publication Number Publication Date
EP0209580A1 true EP0209580A1 (fr) 1987-01-28

Family

ID=24799554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86900979A Withdrawn EP0209580A1 (fr) 1985-01-31 1986-01-21 Dispositif et procede de broyage pneumatique

Country Status (5)

Country Link
EP (1) EP0209580A1 (fr)
AU (1) AU5357186A (fr)
CA (1) CA1305116C (fr)
WO (1) WO1986004527A1 (fr)
ZA (1) ZA86711B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9702796D0 (en) * 1997-02-12 1997-04-02 Next Century Technologies Ltd Media communication apparatus
UY25773A1 (es) * 1998-10-28 2000-08-21 Douglas Forbes Aparato y metodo para granular un material
GB2354232B (en) * 1999-08-03 2001-11-07 Mark William Youds Sewage processing treatment invention
WO2001012332A2 (fr) * 1999-08-11 2001-02-22 Helix Comminutions Limited Procedes et dispositif pour le traitement et la transformation des eaux usees
GB2358629B (en) * 2000-05-18 2001-12-19 Mark William Youds Formulae, methods and apparatus for the: treatment of; processing of; pasteurisation; dissociating water in; and the communication of: materials;

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE138087C (fr) *
US1090073A (en) * 1911-01-07 1914-03-10 Gen Electric Centrifugal pump.
US2851289A (en) * 1957-03-22 1958-09-09 Thiokol Chemical Corp Recirculation seal with plastic wear ring for hydraulic apparatus
US3255793A (en) * 1963-03-01 1966-06-14 Francis H Clute & Son Inc Vacuum comminutor
US4018544A (en) * 1976-02-20 1977-04-19 Hale Fire Pump Company Centrifugal pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8604527A1 *

Also Published As

Publication number Publication date
AU5357186A (en) 1986-08-26
ZA86711B (en) 1986-09-24
CA1305116C (fr) 1992-07-14
WO1986004527A1 (fr) 1986-08-14

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Inventor name: WILEY, ALLEN, C.