DE2130072A1 - Tunnel kiln gas circulation - reduces temp differences within heating - and cooling zones - Google Patents

Tunnel kiln gas circulation - reduces temp differences within heating - and cooling zones

Info

Publication number
DE2130072A1
DE2130072A1 DE19712130072 DE2130072A DE2130072A1 DE 2130072 A1 DE2130072 A1 DE 2130072A1 DE 19712130072 DE19712130072 DE 19712130072 DE 2130072 A DE2130072 A DE 2130072A DE 2130072 A1 DE2130072 A1 DE 2130072A1
Authority
DE
Germany
Prior art keywords
furnace
temp
differences
tunnel
heating
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.)
Pending
Application number
DE19712130072
Other languages
German (de)
Inventor
Andreas Haessler
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 DE19712130072 priority Critical patent/DE2130072A1/en
Publication of DE2130072A1 publication Critical patent/DE2130072A1/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

Tunnel kilns as described in parent patent DT 1288752 having reversing axial combustion chamber gas flow, are provided in addn. with intermittent cross flow to reduce any temp. differences within the heating, and cooling zones. Compressed air or furnace gas is introduced via nozzles at right angles to the combustion chamber axis pref. located in the various tunnel zones, and installed to sides and roof. The injection takes place rhythmically in time with the turning point of the flow direction of the axial stream, i.e. when this main stream is briefly at rest, so that the cross circulation is not subjected to any important extent to deflection along the tunnel axis by it. Such introduction of cross flow produces effective turbulence from high entry velocity with low power consumption.

Description

PER EINSCHREIBEN Impulsumwälzverfahren für Durchlauföfen nach deutschem Patent Nr. 1288 752 Das Betriebsverfahren nach Patent Nre 1288752 hat in der Praxis erheblich verbesserte Brennleistungen durch grosse Turbulenz in Tunnelöfen erbracht. Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die in der Anwärm- und Kühizone bei hohen Brennkanälen vorhandene Temperaturdifferenzen weitgehend zu beseitigen. Es sind Umwälzeinrichtungen mittels Ventilatoren oder Injektoren bekannt, welche im wesentlichen kontinuierlich betrieben werden. Solche Umwälzeinrichtungen sind Jedoch in ihrer Wirksamkeit begrenzt, da kontinuierliche Umwälzströme zu geringe Geschwindigkeiten aufweisen, ansonsten sie Ubereässigen Kraftaufwand haben. Ein weiterer erheblicher Nachteil besteht darin, dass infolge der ständigen Ofenlängsströmung Strahlablenkung erfolgt.BY REGISTER Impulse circulation process for continuous furnaces according to German Patent No. 1288 752 The operating method according to Patent No. 1288752 has in practice Significantly improved firing performance due to large turbulence in tunnel kilns. The present invention is based on the object in the heating and cooling zone to largely eliminate the temperature differences that exist in the case of high firing channels. Circulating devices by means of fans or injectors are known which be operated essentially continuously. Such circulation devices are However, their effectiveness is limited because the continuous circulating flows are too low Have speeds, otherwise they have excessive expenditure of force. A Another significant disadvantage is that as a result of the constant longitudinal flow of the furnace Beam deflection takes place.

Der Erfindung liegt die Aufgabe zugrunde, eine intensive Querunwälzung für Tunnelöfen nach Patent Nr. 1288 752 zu schaffen, welche keine nennenswerte Strahlablenkung in den Querheisschlitsen ergibt. Ferner sollen hohe Strahlgoschwindigkeiten ersielt werden und der Kraftbedarf gering gehalten werden.The invention is based on the object of intensive transverse rolling for tunnel ovens according to patent no. 1288 752, which do not have any significant beam deflection in the Querheisschlitsen results. Furthermore, high jet speeds are to be achieved and the power requirement can be kept low.

Bei dem neuen Impulsumwälzverfahren für Tunnelöfen werden ansich bekannte Injektoreinrichtungen im wesentlichen rechtwinklig zur Brennkanalachse in Seitenwände und Decke des Ofens eingebaut. Die Injektoren werden mit Druckluft oder Ofengas als Treibmittel intermittierend betrieben. Dabei wird die Strahlumwälzung synchron zur Umkehrbewegung des Gasstromes nach Patent Nr. 1288 752 ein- und ausgeschaltet. Im wesentlichen wird die Stahlumwälzung jeweils dann kurzzeitig eingeschaltet, wenn die Hauptströmung in Ofenlängsrichtung den Wendepunkt durchläuft0 Während einer kurzen Zeit herrscht im Ofen hierbei keine Strömung, sodass die Strahlumwälzung intensiv ohne Strahlablenkung in Ofenlängsrichtung voll wirksam wird0 Durch das nur kurzzeitige Einschalten der Strahlwälzung synchron zur Ofenlängsbewegung kann mit geringerem Kraftaufwand und höheren Strahlgeschwindigkeiten gearbeitet werden.In the new pulse circulation method for tunnel kilns are known per se Injector devices essentially at right angles to the axis of the combustion channel in the side walls and ceiling of the furnace installed. The injectors are operated with compressed air or furnace gas operated intermittently as a propellant. Thereby the jet circulation synchronous for reversing the gas flow according to patent no. 1288 752 on and off. In essence, the steel circulation is switched on briefly when the main flow in the longitudinal direction of the furnace passes through the inflection point 0 during a For a short time there is no current in the furnace, so that the jet is circulated is fully effective without deflecting the jet in the longitudinal direction of the furnace can only briefly switch on the jet circulation synchronously with the longitudinal movement of the furnace can be worked with less effort and higher jet speeds.

Claims (1)

PER EINSCHREIBENBY REGISTERED MAIL ANSPRÜCHE AnsPruch 1 Verfahren und Vorrichtung zum Querumwälzen von Ofengasen in Durchlauföfen nach Patent Nr. 1288 752 mit im wesentlichen rechtwinklig zur Hauptgasströmung im Ofen eingebauten Injek toren, welche mit Druckluft oder Ofengas als Treibmittel betrieben werden, dadurch gekennzeichnet, daß das Treibmittel intermittierend, rhytmisch und synchron zum Bewegungsrhytmus der Hauptgasbewegung nach Patent Nr. 1288 752 im Brennkanal eingeblasen wird und das Einblasen des Treibmittels im wesentlichen während der Umkehr der Bewegungsrichtung im Brennkanal erfolgt, sodass die aus den Injektoren kommenden Umwälzstrahlen keine grössere Strahlablenkung in Ofenlängsrichtung erfahren. CLAIMS Claim 1 Method and device for the transverse circulation of Furnace gases in continuous furnaces according to patent no. 1288 752 with essentially rectangular for the main gas flow in the furnace built-in injectors, which with compressed air or Furnace gas are operated as a propellant, characterized in that the propellant intermittent, rhythmic and synchronous to the rhythm of movement of the main gas movement according to patent no. 1288 752 is blown into the combustion channel and the blowing in of the propellant essentially takes place during the reversal of the direction of movement in the firing channel, so that the circulating jets coming out of the injectors do not have any major jet deflection experience in the longitudinal direction of the furnace. Anspruch 2 Verfahren und Vorrichtung nach Anspruch 1, dadurch gekennzeichnet dass die Injektoren in den verschiedenen Zonen des Ofens eingebaut sind.Claim 2 method and device according to claim 1, characterized that the injectors are installed in the various zones of the furnace.
DE19712130072 1971-06-18 1971-06-18 Tunnel kiln gas circulation - reduces temp differences within heating - and cooling zones Pending DE2130072A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712130072 DE2130072A1 (en) 1971-06-18 1971-06-18 Tunnel kiln gas circulation - reduces temp differences within heating - and cooling zones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712130072 DE2130072A1 (en) 1971-06-18 1971-06-18 Tunnel kiln gas circulation - reduces temp differences within heating - and cooling zones

Publications (1)

Publication Number Publication Date
DE2130072A1 true DE2130072A1 (en) 1972-12-21

Family

ID=5811014

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19712130072 Pending DE2130072A1 (en) 1971-06-18 1971-06-18 Tunnel kiln gas circulation - reduces temp differences within heating - and cooling zones

Country Status (1)

Country Link
DE (1) DE2130072A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2601038A1 (en) * 1976-01-13 1977-07-21 Manfred Leisenberg Temperature compensation system for tunnel furnaces - blows air into furnace for breaking up horizontal hot gas stream
DE3324050A1 (en) * 1983-07-04 1985-01-17 Wolfgang Dr.-Ing. 6312 Laubach Leisenberg DEVICE FOR IMPLEMENTING A GAS-SHAPED MEDIUM INTO A FURNACE OR THE LIKE.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2601038A1 (en) * 1976-01-13 1977-07-21 Manfred Leisenberg Temperature compensation system for tunnel furnaces - blows air into furnace for breaking up horizontal hot gas stream
DE3324050A1 (en) * 1983-07-04 1985-01-17 Wolfgang Dr.-Ing. 6312 Laubach Leisenberg DEVICE FOR IMPLEMENTING A GAS-SHAPED MEDIUM INTO A FURNACE OR THE LIKE.
EP0134907A1 (en) * 1983-07-04 1985-03-27 Wolfgang Dr.-Ing. Leisenberg Device for the pulsating supply of a gaseous medium to a kiln or suchlike

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