DE2313974C2 - Method and device for heating open material baths such as galvanizing, enamelling, glass or the like baths in tubs or basins - Google Patents

Description

The invention relates to a method for heating open melt pools, such as galvanizing, Enamelling, lead, metal, glass or similar baths, in tubs or basins. She concerns finer a device for performing the method and is intended to apply to all methods and devices refer, in which an open Materialbacl heat is supplied from the outside to the To bring about and maintain a warming state of the bath. The following is intended as an open weld pool such a tub or basin to be introduced at least temporarily of bath material or for immersing bodies or objects in the bath.

The heating of such open baths has hitherto generally been carried out by heating the

3 4

Outside of the tub or basin from the symmetrical to the longitudinal or transverse axis of the tub

Introduced into the bath from the side or from below by means of gas, oil, coal or the basin and symmetrically

dust burner. Electrical heating is also trisch deducted.

was applied. According to the wall thickness. In a further embodiment of the invention and the material of the tub or basin If there was a significant temperature gradient between the body or object being immersed, it was previously InhsU, d. H. the bath and the burners or see that the gas after leaving the bath the heating means, whereby a strong temperature on the to be treated in the bath or on the in Stress on the tub or pool wall from the bath already treated body or counter-provoked would. In addition, even at io stand was directed to then heated at wer cheaper Arrangement of the burners or the smoke ends.

gas back suction or when mixed with cooling air

uniform heating not possible. The tub or the basin stepped up to above the mouth

Damage from burning through, cracks or defor- mation of the gas in the pipes and the bath

mung up. i ₅ lower end of an exhaust duct for the tub

A further route has therefore been taken, filling the inert gas

The German Auslegeschrift 1 201 856 it is nen or basins to be arranged and on the surface in a device for transferring the heat of the bath. For glass melting a gas on the working fluid of a heat left use this type of heating. In the case of a process that requires ao r *: already known through a k, lead and enamel baths as with mc-liquid metal bath, heat-absorbing gas throughtallic Melt baths were not allowed, apart from supplying them. From the German exposition 1922 647 the disruptive arrangement of the heating device, it is also in the case of a heat exchanger for cooling above the bathtub or basin, the action of hot inert gases in a metal bath underneath If the energy from the surface were to generate relatively little steam, the hot inert gas would be known ring. In addition, it was shown to be discharged into the metal bath through immersion tubes. Measures an undesirable metal oxide formation through the German Auslegeschrift 1 928 093 is weiden direct contact of the melt with the outside is known to consist of a noble gas that gives off heat to conduct air through a metal bath, taking into account the heat load, the bath surface. 30 Ultimately, the German interpretative document 1 922 646 teaches

Another disadvantage of known processes and an inert gas passed through a metal bath in one

To circulate devices for heating material baths, in which a heater and a meter

Tubs and basins could be seen that the plumbing baths are planned. With the known device

gases leave the device at a temperature, the liquid metal serves exclusively as a

the 100 ^c C and more above the lowest tub- 35 heat transfer medium in a heat exchanger

temperature was so that the exhaust gas temperature usually with a closed tub or basin. The Invention

was still over 600 ° C. This exhaust gas loss suggests a fundamentally different

settle the economics of the well-known the way. She uses the bath liquid or

Methods and devices. Do not melt as a heat transfer medium

The invention is therefore based on the task of 40 heat-absorbing media, rather that is in one Method of heating open material- crte gas for immediate heating of an open to create molten baths in tubs or basins, treatment bath, z. B. a galvanizing, enamel which a heating of the bath in economic her-, lead bath or the like. Used. The Durchcher In a manner and with little effort, the inert gas flows through the bath in the gen can. The device according to the invention should produce a so-called bath or basin here simply ir. their structure and in their operation- mammoth pump effect, through which a circulation to be. In particular, the method should be carried out in the bath so that the gas is withdrawn The possibility of application in such baths is possible, from the open bath to part of the bath the body or counterpart to be treated in the bath can be used, for example, with galvanizing, enamelling and objects of all kinds are immersed, d. H. a lead bath outside of the area to be treated Area within the bath itself in front of the body or object receiving pipes and lines remain free and yet a section of the bathroom is located. Without help Circulation of the bath melt is guaranteed. mechanical or other circulating means

To solve this problem, the invention provides all areas of the bathroom without hindrance by one

Process of the type described at the beginning, 55 immersed bodies or objects to be treated which is characterized in that an inert gas or supply or exhaust pipes are circulated,

in the circuit through parts of the closed-off gas side.

open bath and a heater. driving points the tub or basin to everyone

In an advantageous embodiment of the longitudinal * and / or transverse side several, the gas in the

The inert gas is found by means of pipes, ducts, 60 pipes introducing the bath, also are in the

Slits and the like introduced into the bath and above the gas circulation line behind the tub or the basin

the pipes and, in the case of baths, a separator, a compressor and a heater to be immersed for treatment

Corresponding body or objects outside of the intended.

wegungsbahn Lines such a body or object here can expediently in the gas line of or outside of an addition and skimming 65 between the bath receiving tub or

direction deducted. the basin and the compressor an air preheater

The inert G; i £ is arranged in a preferred outlet for the combustion air of the heater be management form of the method according to the invention. In a different configuration, the line

_lung mix dem VerLcr and de, Hrh ,,.

the delay that the ^

if there is any gas in the air

corn is cooled and with the lower fempe- \ ζ

for to be immersed in the bath _{G, GCSC} haltel is _mAbs ^g, _üb over the representation

is .5
.st, 5

known per se

hen parallel to and near f
side walls arranged smd front

between the lower YES iifcrechSi shaft or pelvis.nnem closed vertical ^

wall and the immersion tube or the

a baffle is provided. Through

initiated into the bathroom. Gas f ™ ^

low movements " ^ahe ^

wall while bubbling through ^d Jf

Gas gives the Badte.l mi the ^

Gas bubbles f ' ⁿ «S ^e ^ ^g ^ E»: from the pipe part above the gas outlet from the ^

Moved forward w.rd and lj «> g * * ⁿ templates, bathroom content is carried out. Will the oa ^ en of the tub or

α "ÄnÄSÜ [so fS on the walls of the W ^e anne or SL

°. The .5

³ °

from » ^f ii? ^ JS ^ w? kuS? dn overturning the emerging Maminutpmpenffekt a

Tub and? «* ^ J ^ jS tel even around immersed bodies or

guaranteed in one

The U «J" ^^ SS! ^ BS agreed with the distant tubs farewell to the possibility of training

f to ^^ ernn-

according to the method consists essentially

from a tub or basin 1, a supply ^. ^ _sowje ^ _{Zwi henlci} .

U.ng between these parts. The heater has an air pre-warmer £ heat exchanger 4

_{g for the burner 6 of the heating wine, ze} on rs. _{The in the} F i g. 1 to 3 reproduced tub _{or the} basin 1 is used with its contents to lower the web-shaped metal band. For this purpose, the tub or the basin t is formed from a lower part 7 _{which has the walls 8> q and the} floor 10. The walls and the floor can be formed from two different material layers, wöbe, the outer material layer 11 consists of metal and is provided with side flanges 12. The inner layer, on the other hand, is, as usual, a ceramic

^ Mif the flanges 12 of the outer layer of the lower part 7, the flanges 13 of a metallic attachment 15, which carries a ceramic lining 16, are connected. The lower part 7 and ^ attachments 15 form, as shown in FIG. 3 to be recognized is a tub or basin that is open at the top.

On the side and above the essays is on the

_{d £ s} basin, e a

himself

the

and goes into one of the wall 21, the forehead

SnTin the SSA
connected. Furthermore, behind Scheider Kr Jitotojfc

¹ p

ter and
ch

In

Line 37 ^ _g . 1) connected to the compressed. ^ ^^ ^

f ^. Turned away from the inside of the basin, a separator 26 at, de, protrudes from the southern 50 into a shaft section 27. In this flows d the supply lines 28, which together in the line 3 '!

^ ^^ pass over during this to

Tub lines 28 opposite dip tubes 29 in the

about such e
in and

path, like "Ti ^ un" f Bodies that get caught up in immersion

^m ^ _eria] . _{fc entry point into the} tub or basin from un

to below the usual metal bath level Sp m de

be tub or basin, oc _{OT the m} row adjacent to each other

7 8

• nd a little below the lower end of the immersion heater 5 for the combustion air of the burner 6

The lower edge of the partition or baffle 32 is arranged. In contrast, the air preheater can

lohre 29, which in turn are switched to line 37 about halfway up the set,

End of the bath depth. whereby the emerging from the shafts 17, 18

The partition or baffle walls 32 are cooled even further to S inert gas and are fed to the compressor 2 in this to the bottom 7 of the tub or basin 1 to their position.
Continuation in each case a grid 33, so that, as in the case of the embodiment according to FIG. 2 is shown in FIG. 3 indicated flow arrows recognize gas-tight closed circuit of the inert gas, melt bath parts in the direction of the arrows 34 between the lines 25 and the compressor 2 through the grid 33 in the space 35 between the to a treatment chamber 40 provided, with Lei grid or the separator - and Umlankwand 32 and the lines 41, 42 the inert gas on both sides of a wall 8 or 9 of the tub or basin 1 to be treated or a material web W already flowing in it. The inert gas exiting from the dip tubes 29 at their lower end treated bath M of the tub or basin 1 bubbles through the material web and this preheat melt in this space 35 outwards and gets 15 or dry. The gas is drawn off via the conduit in the direction of the arrows through the shafts 17, 18 and 43, 44 and the conduit 37 leads to the compressor 2 to the compressor 2, which thereby acts on it with cooler gas

The distance between the partition or deflection wall 32 is as it is in the embodiment according to FIG. 1

as is the case with the grid 33 of the walls 8, 9 and 15, 16.

the arrangement of the dip tubes 29, the immersion depth ao. In the embodiment according to FIG. 4 protrudes a

the tubes, the distance from the upper edge of the individual immersion tube 45 in a cylindrical separation or

Partition or deflection walls 32 and the assignment of deflection wall 46, which are arranged downward in a grid 47

of the walls 19 of the shafts 17, 18, which is not too long. Above the wall 46 is a pot-like

lower edge arranged under the mirror Sp of the Schmelzeba- hood 48, the vertical or inclined

of the M protrude, cause a circulation of the metal bar 25 wall 49 as well as the upper edge of the separating

des, wherein the middle section 36 of the trough for or deflection wall 46 to below the melt pool

a treatment body or for passing through mirror is enough. One or more

the web to be treated remains free. rere flue pipes 50 through which the gas is withdrawn

In the embodiment according to FIG. 1 that will come. The embodiment according to FIG. 4 is suitable

cooled, compressed inert gas via a line 30, in particular for subsequent attachment to

38 to the heat exchanger 3, from there over existing tubs or basins and has the

the line 39 is fed to the dip tubes 29 to advantage, as required in any number and at

are to be arranged to the horizontal section 30 of a random point on the tub edge

Line 26 α is guided in parallel, through which through the.

Melting particles separated by the separator 26 The number of dip tubes 45 in each hood

Bath to be fed back. can be varied, as can the arrangement and

Above the heat exchanger 4, the number of air in front of the exhaust pipes 50 can be changed.

1 sheet of drawings

Claims (19)

Patent claims: 1. Process for heating open material baths, such as galvanizing, enameling, Lead, metal, glass or the like -baths, in tubs or basins, characterized in that an inert Gas in the circuit closed by the gas side Parts of the open bath and a heater is passed. 2. The method according to claim !, characterized in that the inert gas through pipes, Slits, channels and the like introduced into the bath and above the pipes, slits, channels and the like outside the movement path of a body to be treated in the bath or an addition or Skimming device is withdrawn. 3. The method according to claim 1 and 2, characterized in that the inert gas is symmetrical Introduced into the bath along the longitudinal or transverse axis of the tub or basin and symmetrically is deducted. 4. The method according to claim 1 to 3 for treatment baths for bodies to be immersed or Objects, characterized in that the gas after leaving the bath on the in to be treated in the bath or on the body or object already treated in the bath is directed to be subsequently heated. 5. The method according to claim 1 to 4, characterized in that the tub or the basin to above the Rohrmiindur '.en and the lower End of an exhaust duct of the tub or basin for the inert gas is filled. 6. Device for performing the method according to claim 1 to 5, characterized in that that the tub or basin (1) on each longitudinal and / or transverse side several, the Has gas in the bath (M) introducing pipes (29) and that in the gas circuit line behind a separator (26), a compressor (2) and a heater (3) are arranged in the tub or basin are. 7. Apparatus according to claim 6, characterized in that in the gas line between the the bath (M) receiving tub or the basin (1) and the compressor (2) an air preheater (5) is arranged for the combustion air of the heater (3). 8. Apparatus according to claim 6, characterized in that in the line between the Compressor (2) and the heater (3) or an air preheater (5) is arranged in the heater. 9. Apparatus according to claim 6 to 8, characterized in that above the tubes on Tub or basin edge a drainage shaft (17, 18) is arranged, the tub or The vertical wall (19) facing the interior of the pool ends above the pipe mouths. 10. Apparatus according to claim 6 to 9, characterized in that the tubes are known per se Dip tubes (29) are arranged in rows parallel to and close to the tub or basin side walls (8,9) are arranged. 11. The device according to claim 6 to 10, characterized in that between the lower Section of the vertical shaft wall (19) and facing the inside of the tub or basin a partition or baffle (32) is provided for the immersion tube or the tube mouth. 12. The device according to claim H, characterized in that the partition or deflection wall (32) above the lower edge of the tub or basin interior facing Shaft wall (19) ends. 13. Apparatus according to claim 11, characterized characterized in that the partition or deflection wall (32) merges downward into a grid (33). 14. The device according to claim 11, characterized characterized in that the partition or deflection wall (32) at a distance from the tub or basin bottom (10) ends. 15. The device according to claim 6, characterized in that the shaft (17, 18) on each tub or basin side with eirici.i in the feed line (26 a) to the dip tubes (29) opening separator (26) is connected. 16. Apparatus according to claim 6 to 15, characterized in that between the shaft (17, 18) of each tub or basin side and the compressor (2) or the one connected in front of them Air preheater (5) a gas-tight sealed Bekrindlungskammer (40) for the in the bath is arranged to be immersed or immersed. 17. Device according to claims bis8, characterized characterized in that the gas in the bath (M) introducing tubes (45) in their in the Bath immersed section are surrounded by a separating or deflecting cylinder (46). 18. Apparatus according to claim 17, characterized in that the dip tubes (45) above of the separating and deflecting cylinder (46) protrude through a cylindrical or conical hood (49), ir · the one or more gas discharge pipes (50) open. 19. Apparatus according to claim 17 and 18, characterized in that the centric to the Dip tube (45) and the hood (49) arranged separating or deflecting cylinder with these parts and the gas discharge pipe (50) forms a structural unit and several of these structural units to the Longitudinal or transverse edges of the tub or the basin (1) are arranged.