EP1667797B1 - Verbesserte beschleunigungsdüse für gas-feststoff-suspension - Google Patents

Verbesserte beschleunigungsdüse für gas-feststoff-suspension Download PDF

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Publication number
EP1667797B1
EP1667797B1 EP03818693A EP03818693A EP1667797B1 EP 1667797 B1 EP1667797 B1 EP 1667797B1 EP 03818693 A EP03818693 A EP 03818693A EP 03818693 A EP03818693 A EP 03818693A EP 1667797 B1 EP1667797 B1 EP 1667797B1
Authority
EP
European Patent Office
Prior art keywords
gas
acceleration nozzle
head
flow channel
gas outlet
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.)
Expired - Lifetime
Application number
EP03818693A
Other languages
English (en)
French (fr)
Other versions
EP1667797A1 (de
Inventor
Jouko Niemi
Jarkko Tamminen
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.)
Micropulva Ltd Oy
Original Assignee
Micropulva Ltd Oy
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 Micropulva Ltd Oy filed Critical Micropulva Ltd Oy
Publication of EP1667797A1 publication Critical patent/EP1667797A1/de
Application granted granted Critical
Publication of EP1667797B1 publication Critical patent/EP1667797B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B02C19/06—Jet mills
    • B02C19/065—Jet mills of the opposed-jet type

Definitions

  • a tubular nozzle is used, the inside diameter of which is either throughout of the same size, or if higher speeds are aimed at, on the output side slightly tapering and on the inlet side slightly expanding.
  • the gas outlet channels in question are advantageously placed at regular intervals side by side in circular order forming at least one circular ring. If one wants to keep the cross-section of separate gas outlets small said channels can be arranged in several circle rings. The best effect is reached, when suspension gets into the gas outlet channel without causing turbulence in the beginning of gas outlet channels. This is reached if the gas outlet channel forms with the middle axis of the flow channel an angle of 45°.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Treating Waste Gases (AREA)
  • Nozzles (AREA)

Claims (7)

  1. Eine verbesserte Beschleunigungsdüse für die Gas-Feststoffsuspension, die eine herkömmliche Beschleunigungsdüse (1) umfasst, wobei an dem Austrittsende ein rohrförmiger Kopf (2) ohne Ansätze an der Innenseite vorgesehen ist, dessen Strömungskanal (3) entweder durchgängig gleich groß oder zumindest an seinem Ende konisch verjüngt, und in die Wände des rohrförmigen Kopfs sind mehrere von der Mittelachse (A) des Strömungskanals (3) aus diagonal nach Außen führende Gasaustrittskanäle (4) gemacht, gekennzeichnet dadurch, dass vorgesehen ist, dass durch die erwähnten Kanäle (4) zu Beginn der konischen Verjüngung des Strömungskanals (3) sich ein Teil des Gasstroms der Gas-Feststoffsuspension von der Gas-Feststoffsuspension ableitet.
  2. Eine Beschleunigungsdüse gemäss Patentanspruch 1, gekennzeichnet dadurch, dass der Gasaustrittskanal (4) einen Winkel von etwa 45° mit der Mittelachse (A) des Strömungskanals bildet.
  3. Eine Beschleunigungsdüse gemäss Patentanspruch 2, gekennzeichnet dadurch, dass die Gasaustrittskanäle (4) von ihrem Querschnitt her rechteckig oder rund sind und durchgängig von der gleichen Größe oder in der Strömungsrichtung zum Ende hin konisch verjüngend.
  4. Eine Beschleunigungsdüse gemäss Patentanspruch 2, gekennzeichnet dadurch, dass die Gasaustrittskanäle (4) geformt werden durch längslaufende Schlitze, die bis zu dem Austrittsende des Kopfs (2) reichen.
  5. Eine Beschleunigungsdüse gemäss einem oben erwähnten Patentansprüche, gekennzeichnet dadurch, dass der erwähnte rohrförmige Kopf (2) abnehmbar an dem Austrittsende der herkömmlichen Beschleunigungsdüse (1) befestigt ist.
  6. Eine Beschleunigungsdüse gemäss Patentanspruch 5, gekennzeichnet dadurch, dass die Gasaustrittskanäle (4) im mittleren Bereich des Kopfs (2) angeordnet sind.
  7. Eine Beschleunigungsdüse gemäss Patentanspruch 1, gekennzeichnet dadurch, dass der Strömungskanal im Endteil des Kopfs (2) sich derart konisch verjüngt, dass sein Querschnitt mindestens der gesamten Querschnittfläche der Einlassöffnungen der Gasaustrittskanäle (4) entspricht und mindestens etwa 20% der Querschnittsfläche zu Beginn des Kopfs (2) ist.
EP03818693A 2003-09-19 2003-09-19 Verbesserte beschleunigungsdüse für gas-feststoff-suspension Expired - Lifetime EP1667797B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2003/000685 WO2005028115A1 (en) 2003-09-19 2003-09-19 Improved acceleration nozzle for gas-solids suspension

Publications (2)

Publication Number Publication Date
EP1667797A1 EP1667797A1 (de) 2006-06-14
EP1667797B1 true EP1667797B1 (de) 2011-05-25

Family

ID=34355287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03818693A Expired - Lifetime EP1667797B1 (de) 2003-09-19 2003-09-19 Verbesserte beschleunigungsdüse für gas-feststoff-suspension

Country Status (4)

Country Link
EP (1) EP1667797B1 (de)
AT (1) ATE510626T1 (de)
AU (1) AU2003262609A1 (de)
WO (1) WO2005028115A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2619880A1 (de) * 1976-05-05 1977-11-24 Gvnii Zementnoj Promy Niizemen Injektor fuer strahlapparate
FI74222C (fi) 1985-09-18 1988-01-11 Finnpulva Ab Oy Kvarnhus foer tryckammarkvarn.
JPH03138084A (ja) * 1989-10-23 1991-06-12 Brother Ind Ltd プラズマ切断装置
FI86514C (fi) * 1990-12-19 1992-09-10 Finnpulva Ab Oy Kvarnkammare foer en motstraolskvarn.
US6138931A (en) * 1999-07-27 2000-10-31 Xerox Corporation Apparatus and method for grinding particulate material
DE10116483B4 (de) * 2001-04-03 2006-08-17 Josef Fischer Vorrichtung zum Zerkleinern von Schüttgut

Also Published As

Publication number Publication date
WO2005028115A1 (en) 2005-03-31
EP1667797A1 (de) 2006-06-14
ATE510626T1 (de) 2011-06-15
AU2003262609A1 (en) 2005-04-11

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