CH87446A

CH87446A - Steam boiler for electrode heating with high-voltage alternating current.

Info

Publication number: CH87446A
Authority: CH
Inventors: Cie Aktiengesellschaft Boveri
Original assignee: Bbc Brown Boveri & Cie
Priority date: 1919-06-13
Filing date: 1919-06-13
Publication date: 1920-12-01

Description

  

  Dampfkessel für     Elektrodenheizung    mit     hochgespanntem    Wechselstrom.    Bei     elektrisch    geheizten     Dampfkesseln    für  Reizung     finit    von     hocbgespaniitein    Wechsel  strom gespeisten Elektroden, die von senk  recht stehenden, oben und unten     offenen    Iso  lierröhren umgeben sind, ist es     bekannt,    die       Dampferzeugung    durch Verändern des Quer  schnittes oder der Länge der stromführenden  Wassersäule     innerhalb    des Isolierrohres zu  regeln.

   Die Erfindung bezieht sich auf solche  Kessel, bei denen die offenen Isolierröhren  oberhalb der Wasseroberfläche im Dampf  raume des Kessels endigen. Der Wasserraum  des Kessels ist durch eine horizontale     Wand     in zwei Abschnitte geteilt, welche einerseits  durch die Isolierröhren und anderseits durch  eine mit Pumpe versehene Umlaufleitung  miteinander verbunden sind. Wird also in  den untern Teil des Kessels Wasser gepumpt,  so kann dieses     mir    durch die     Isolierröhren          hindurchströmen    und fliesst über deren obern  Rand in den obern Teil des Kessels     zurück,     soweit es nicht verdampft. Der überfliessende  Wasserschleier bildet somit den hauptsäch  lichen Weg für den elektrischen Strom.  



  Die Erfindung sei anhand des in der Zeich  nung dargestellten Ausführungsbeispiels näher    erläutert. Der stehende Kessel     a    ist durch  die horizontale     Zwischenwand    b in zwei     über-          einanderliegende    Räume     c-    und d verschie  dener     Grösse    geteilt. Die Wand b wird von  den Isolierröhren f durchsetzt, die über die  Wasseroberfläche im Raume d hinausragen.       Ini    obern 'feil der Röhren sind die Elek  troden     e    angeordnet, deren Zuleitungen iso  liert durch die Kesselwand     hindurchgeführt     sind.

   Die     KesselriLume    c und d sind durch  die Rohrleitungen     g,        h.    verbunden, durch  welche     mittelst    der Pumpe     i    das Wasser aus  dem obern Kesselraume d in den untern ge  pumpt wird. In die Saugleitung     g    der Pumpe  mündet noch die Speiseleitung     k    des Kessels.  Die Pumpe i treibt das Kesselwasser durch  die Röhren     f    hindurch, so dass es über deren  obern Rand     überflief')t    und dort einen Wasser  schleier     na    bildet, der den hauptsächlichen  Weg für den elektrischen Strom bildet.  



  Soll die Dampferzeugung des Kessels ge  regelt werden, so kann man das entweder  durch Regelung der Pumpenleistung bewerk  stelligen,     wodurch    sich der Querschnitt des  stromführenden     jN'asserschleiers        iyt    verändert,  oder     dureli    Regelung des Wasserstandes,      wodurch die Länge des stromführenden       Wasserschleiers    in geändert wird.  



  Die. Form des Wasserschleiers lässt sich  auch durch isolierende oder isolierte Gegen  flächen beeinflussen, gegen die das Wasser  am obern     Ausgange    der Isolierröhren ge  trieben wird. Durch Verschieben dieser Gegen  flächen kann der elektrische Widerstand des  Wasserschleiers und damit die Dampferzeu  gung geregelt werden.



  Steam boiler for electrode heating with high-voltage alternating current. In electrically heated steam boilers for irritation finitely powered by hocbgespaniitein alternating current electrodes, which are surrounded by vertical, open top and bottom Iso lierröhren, it is known to cut the steam by changing the cross section or the length of the current-carrying water column within the insulating tube regulate.

   The invention relates to such boilers in which the open insulating tubes end above the water surface in the steam room of the boiler. The water space of the boiler is divided into two sections by a horizontal wall, which are connected to one another on the one hand by the insulating tubes and on the other hand by a circulation line equipped with a pump. So if water is pumped into the lower part of the boiler, it can flow through the insulating tubes and flows back over their upper edge into the upper part of the boiler, provided it does not evaporate. The overflowing veil of water thus forms the main path for electrical current.



  The invention will be explained in more detail with reference to the embodiment shown in the drawing voltage. The standing boiler a is divided by the horizontal partition b into two superimposed rooms c and d of different sizes. The wall b is penetrated by the insulating tubes f, which protrude above the water surface in space d. In the upper part of the tubes the electrodes are arranged, the leads of which are insulated and passed through the boiler wall.

   The KesselriLume c and d are through the pipes g, h. connected, through which the water is pumped from the upper boiler room d into the lower one by means of the pump i. The feed line k of the boiler also opens into the suction line g of the pump. The pump i drives the boiler water through the tubes f so that it overflows over their upper edge and forms a veil of water there, which forms the main path for the electric current.



  If the boiler's steam generation is to be regulated, this can be done either by regulating the pump output, which changes the cross-section of the live water curtain, or by regulating the water level, which changes the length of the live water curtain.



  The. The shape of the water veil can also be influenced by insulating or insulated counter surfaces against which the water is driven at the upper exit of the insulating tubes. By moving these counter surfaces, the electrical resistance of the water curtain and thus the generation of steam can be regulated.

Claims

PATENT CLAIM: Electrically heated steam boiler for heating with electrodes fed by high-voltage alternating current, which are surrounded by vertical insulating tubes that are open on both sides and end above the water surface, characterized in that the water space of the boiler is divided into two sections by a horizontal wall , which on the one hand are connected by the insulating tubes and on the other hand by a circulation pump that drives the boiler water upwards in the insulating tubes, so that the water emerging from the insulating tubes forms a water veil, which is the main route for the electrical current. SUBCLAIMS 1.

Steam boiler according to claim, characterized in that the feed water line of the boiler opens into the suction line of the circulation pump. 2. Steam boiler according to claim, characterized in that the shape of the water veil is influenced by a counter surface against which the water pumped through the insulating tubes is driven. 3. Steam boiler according to claim with controllable steam generation, characterized by means which allow at least one dimension of the ZZ'asser "veil to be changed so that its electrical resistance is changed for the current flowing through it.

Steam boiler according to dependent claim 3, characterized by means for changing the pump output, which allow the cross-section of the water to be controlled. Steam boiler according to dependent claim 3, characterized ge by means for adjusting the water level, which ge equip to regulate the length of the water veil. 6. Steam boiler according to dependent claims 2 and 3, characterized by means for moving the (Aregen area, which ge equip to regulate the length of the @@ 'asserschleiers.

7. Steam boiler according to dependent claim 3, characterized in that various devices are combined according to the subclaims 4-6.