WO2017063666A1

WO2017063666A1 - Device for generating a steam-containing gas atmosphere, and system component comprising such a device

Info

Publication number: WO2017063666A1
Application number: PCT/EP2015/073578
Authority: WO
Inventors: Mirsolav MORAVSKY; Reiner JUFFA
Original assignee: Emp-Glass Gmbh
Priority date: 2015-10-12
Filing date: 2015-10-12
Publication date: 2017-04-20
Also published as: JP6638076B2; JP2018533719A

Abstract

The invention relates to a device (1) for generating a steam-containing gas atmosphere on an outer wall (2.1) and/or inner wall (2.2) of a melt-conducting channel (2) or in a chamber of a system component (A), comprising - a container (1.1) for receiving a liquid (F) and a carrier gas (G), wherein the container (1.1) is equipped with a steam chamber (D) in which the carrier gas (G) can be mixed with a liquid steam, thereby forming a steam/gas mixture (DGG), and - at least one distributor line (1.9) for distributing the steam/gas mixture (DGG) along the outer wall (2.1) and/or inner wall (2.2) or in the chamber of the system component (A).

Description

Apparatus for generating a vapor-containing gas atmosphere and

Plant component with such a device

The invention relates to a device for generating a vapor-containing gas atmosphere. The invention further relates to a system component with at least one such device.

In systems for the conditioning of inorganic non-metallic melts, eg. As glass and the like. More, and for shaping are particularly high demands on purity, optical quality and homogeneity of produced components, eg. As glasses, walls of melt leading plant components of precious metals, in particular platinum or

Made of platinum alloys.

At temperatures of the inorganic-nonmetallic melts in a range between 1000 ° C and 1700 ° C and beyond a proportion of water in the melt is partially dissociated. The free hydrogen ion is capable of the wall of the system component, ie in this case z. B. the platinum wall to traverse to the outside, so that oxygen on an inner wall of the

Plant component remains.

This can lead to the appearance of oxygen bubbles, which are difficult or impossible to remove after a refining of the melt. such

Oxygen bubbles can degrade the quality of the product or render it unusable.

The melt-carrying system component is usually formed as a channel with a circular, elliptical or rectangular-like cross-section, with modifications of a purely cylindrical design with - -

Diameter changes and further shape deviations are possible, as is known for example in the so-called feeder head.

The noble metal-containing outer wall of the melt-leading channel of the system component is surrounded by a refractory material. It serves both the thermal insulation and the mechanical support of the outer wall of the melt leading channel.

To solve the above-described problem of the formation of oxygen bubbles on the inner wall of the melt-conducting channel, various possibilities are known from the prior art. In particular, so far two basic approaches are known, either a double-walled construction with supply of hydrogen or water vapor to the precious metal-containing

Outside wall of the melt-leading channel is guided or there is a barrier layer to prevent hydrogen diffusion provided. Furthermore, an electrochemical influencing of the bubble formation is conceivable.

In WO 98/018731 A2, DE 69730350 T2 and US 5785726 A, the diffusion of hydrogen through a wall of the platinum tube is prevented by applying a hydrogen atmosphere on an outer wall of a platinum tube or the melt-carrying channel. This is done, for example, by supplying

Water vapor on the outer wall of the platinum tube realized in consideration of a partial pressure of water vapor on an inner wall of the platinum tube. In order to achieve a sufficiently high partial pressure of hydrogen on the outer wall, a housing is provided.

WO 02/44115 A3 describes a coated metal part for the production of glass, which has a layer which is impermeable to hydrogen on the side facing away from the molten glass.

In a method for producing glass described in DE 10 2004 015 577 B4, molten glass is at least partially of noble metal walls or Surrounding refractory metal walls, wherein an oxygen bubble formation by controlling the oxygen partial pressure in the molten glass is avoided by at least one probe for determining the

Oxygen partial pressure in the near-surface region at the

Arranges glass melt / metal wall, and regulates the oxygen partial pressure.

In particular, it is provided that a range of oxygen partial pressure is determined in which neither bubbles nor N 2, CO 2 and / or SO 2 bubbles and / or alloy damage to metal walls and by means of a on the

Metal wall or arranged in the melt electrode by applying a counter-voltage and / or by rinsing by means of hydrogen, water vapor or oxygen in pure or diluted form, the oxygen partial pressure in this range.

The invention is based on the object, an improved over the prior art apparatus for generating a vapor-containing

Gas atmosphere on an outer wall and / or inner wall of a melt-leading channel or specify in a space of an equipment component. The invention is further based on the object to provide a system component with such a device.

With regard to the device, the object is achieved according to the invention with the features specified in claim 1. With regard to the

Plant component, the object is achieved according to the invention with the features specified in claim 6.

Advantageous embodiments of the invention are the subject of the dependent claims.

An inventive device for generating a vapor-containing

Gas atmosphere on an outer wall and / or inner wall of a melt-carrying channel or in a space of a plant component comprises a container for receiving a liquid and a preferably non-oxidizing carrier gas. In the container, a vapor space is formed, in - -

in which the carrier gas can be mixed with a liquid vapor to form a vapor-gas mixture. The apparatus further comprises a distribution line for distributing the vapor-gas mixture along the

Outer wall and / or inner wall or in the space of the system component.

The device allows in a simple manner, a uniform distribution of the vapor-gas mixture over the entire circumference of the outer wall and / or inner wall or a space of the

Plant component and thus the generation of a uniform vapor-containing gas atmosphere, in particular when producing a vapor-containing

Gas atmosphere on a noble metal-containing outer wall prevents diffusion of dissociated hydrogen ions from the melt through the outer wall, or at least reduced and thus the formation of oxygen bubbles on the inner wall of the melt-conducting channel is significantly reduced. As a result, the products made from the melt have an optimum quality.

According to one embodiment of the invention, the carrier gas of a

Gas reservoir can be supplied via a gas supply line in the vapor space of the container. As the carrier gas, a non-oxidizing noble gas or nitrogen is preferably used.

The liquid may be from a liquid reservoir via a

Liquid supply line are filled into the container until reaching a predetermined level. The promotion of the liquid is preferably carried out by means of a pump with a low power.

The vapor space, in which a vapor of the liquid and the carrier gas mix, is expediently formed above the level. Thus, the formation of an optimally dimensioned steam space is dependent on the predetermined level. For the exit of the vapor-gas mixture from the distribution line, this has a plurality of openings which are introduced into a wall of the distribution line. The openings are arranged at a distance of, for example, 10 mm to 60 mm, preferably 20 mm to 40 mm from each other. The individual openings each have a diameter of, for example, 2 mm to 5 mm. This is the most uniform possible escape of the vapor-gas mixture from the distribution line possible.

An application of the device is provided in a system component, which comprises at least one melt-conducting channel with an outer wall and an inner wall facing the melt and at least one device according to the invention.

The plant component is provided for example for the production of glasses, wherein the integration of at least one inventive

Device in the plant component, the glasses produced in terms of reducing or avoiding oxygen bubbles in the glasses significantly improved.

According to one embodiment of the invention, the outer wall of the melt-carrying channel are provided with a noble metal layer and the inner wall of the melt-leading channel with a refractory material. To form a noble metal layer is in particular platinum or a

Used platinum alloy.

To avoid direct contact between the manifold and the outer wall of the melt leading channel is a gas permeable

Separating layer arranged, which is formed of a porous and / or textile material and thus a passage of the vapor-gas mixture to

Outside wall allows. - -

In a horizontally extending melt leading channel, the distribution line extends in the direction of a longitudinal extent of the melt-leading channel parallel to the outer wall, wherein up to a certain

Channel diameter, the generation of a vapor-containing gas atmosphere with a one-sided arrangement of one or more distribution lines is sufficient. For larger channel diameters, a two-sided arrangement of one or more distribution lines takes place parallel to the longitudinal extent of the melt-leading channel.

If the melt-carrying channel or a section of the melt-carrying channel runs vertically, the distributor line becomes at least partially circumferential in the outer wall of the melt-conducting channel

arranged. This is possible by means of an annular distribution line or by means of two arcuate distribution lines.

Furthermore, current-carrying flanges are provided which delimit the melt-guiding channel at the end. The Stromführungsflansche serve to hinder the outflow of the vapor-gas mixture from the area near the outer wall to the outside.

For thermal sealing of the melt-leading channel to the outside this is surrounded by a heat insulation, which is formed of at least an inner heat insulation and an outer heat insulation. The

Thermal insulation works in conjunction with the current-carrying flanges similar to a housing of the melt-leading channel.

The container of the device is in this case at least partially disposed within the outer heat insulation, so that the container in which the liquid is filled and the vapor-gas mixture is generated, at least partially thermally insulated. This can be influenced depending on a position of the container in the outer heat insulation, a liquid temperature in the container and the resulting vapor content in the steam-gas mixture. - -

In addition, according to an embodiment of the invention, in each case between a channel leading to the melt facing surface of the

Stromführungsflansches and the inner heat insulation formed a gap. The gap allows the generation of a vapor-containing gas atmosphere on the outer wall in the region of the current-carrying flanges, so that a distribution of the vapor-gas mixture is also possible here.

Embodiments of the invention are described below with reference to

Drawings explained in more detail.

Show:

1 shows schematically an embodiment of a device for

Generation of a vapor-containing gas atmosphere on an outer wall of a melt-leading channel of a plant component,

Figure 2 schematically shows a supply and distribution line of the device and a portion of a melt channel leading a

Plant component

3 shows schematically an embodiment of a

Plant component with a melt-carrying channel and a plurality of devices,

Figure 4 shows schematically a section of a plant component in an alternative embodiment, wherein the distribution line and the feed line of the device are arranged at an angle of not equal to 90 degrees to each other. - -

Figure 5 schematically shows a portion of the distribution line and the

Supply line of the device, which are arranged at an angle of not equal to 90 degrees to each other,

FIG. 6 shows a schematic representation of a detail of a ring-shaped distribution line,

FIG. 7 schematically shows a section of an exemplary embodiment of a system component with a section of a melt-carrying channel with two flow guide flanges and a device,

FIG. 8 schematically shows a section from another

Embodiment of a plant component with a portion of a melt-leading channel with two

Stromführungsflanschen and a device,

FIG. 9 is a schematic sectional view of the exemplary embodiment of the system component shown in FIG

FIG. 10 schematically shows a partial sectional view of a

Melt leading channel with a separating layer and a distribution line.

Corresponding parts are the same in all figures

Provided with reference numerals.

FIG. 1 shows schematically an exemplary embodiment of a device 1 for producing a vapor-containing gas atmosphere on an outer wall 2.1 of a melt-conducting channel 2 of an example shown in FIG

Plant component A. - -

The device 1 comprises a container 1.1, which for example

is formed hollow cylindrical and thus has a circular cross-sectional profile. The container 1.1 may alternatively be other suitable

Have cross-sectional profiles.

The container 1.1 is made of a corrosion-resistant material, preferably made of stainless steel, and provided for receiving a water-containing liquid F and a non-oxidizing carrier gas G.

The liquid F is the container 1.1 via a

Liquid supply line 1.2 is supplied, which opens laterally into the container 1.1 and which is connected to a liquid container 1.3, in which a predetermined amount of liquid F is located. About one in the

Liquid supply line 1.2 arranged pump 1.4, the liquid F is required in the container 1.1. The pump 1.4 is electrically and / or mechanically controllable and / or regulated, so that the liquid F is filled until it reaches a predetermined level P in the container 1.1.

The level P is set with a clear height in the container 1.1 between 20% and 70%, so that on the one hand, a minimum amount of the liquid F is not exceeded, to continuously sufficient steam, z. For example, steam; and on the other hand, a maximum amount of the liquid F is not exceeded, so that a vapor space D above the level P can be formed with an optimum volume. Instead of steam, other vapors or vapor mixtures can be used. However, in plant components A for glass production, the use of water vapor is expedient to avoid formation of oxygen bubbles.

For supplying the carrier gas G in the vapor space D is a

Provided gas supply line 1.5, which projects concentrically into the container 1.1 in the present embodiment, wherein an open end of the

Gas supply line 1.5 opens into the vapor space D and given a predetermined - -

Height or length of, for example, 20 mm beyond a maximum predetermined level P protrudes.

The gas supply line 1.5 is outside the container 1.1 connected to a gas reservoir 1.6, in which a predetermined amount of the carrier gas G is added. A setting of a desired one

Gas flow through the gas supply line 1.5 is effected by means of a arranged in the gas supply line 1.5, controllable and finely adjustable

Gas supply 1.7. The flow of the carrier gas G is controlled directly via a flow regulator arranged in the gas feed 1.7. When

Carrier gas G, noble gases, nitrogen or other non-oxidizing, non-flammable and non-toxic gases or mixtures thereof can be used.

A volume flow of the carrier gas G is preferably less than 300 l / h, preferably less than 100 l / h at a temperature of 20 ° C and

Atmospheric pressure, when at the same time by the pump 1.4 in the

Container 1.1 transported liquid quantity is set to less than 0.25 1 / h under otherwise identical temperature and pressure conditions. These specifications depend on the size of the surface to be wetted of the outer wall 2.1 and a sealing effect of a heat insulation 3 and each relate to a device 1. When increasing the volume flow starting from the pump 1.4, an increase in the liquid temperature in the container 1.1 may be appropriate. This can be achieved by adjusting the position of the device 1 in the region of an external heat insulation 3.1.

If the carrier gas G enters the vapor space D, it mixes there with a vapor which is formed by heating the liquid F and which is controlled indirectly via the liquid quantity filled in the container 1.1. By mixing creates a vapor-gas mixture DGG, wherein a percentage of vapor content on the flow rates of the carrier gas G on the one hand and by a supplied by the pump 1.4 liquid F on the other hand, and a temperature of the liquid F in the container 1.1 determined. - -

The resulting vapor-gas mixture DGG is supplied via a arranged above the steam space D feed line 1.8 1.8 shown in Figure 2 distribution line 1.9, wherein a promotion of the steam-gas mixture DGG via the feed line 1.8 by means of the supply of

Carrier gas G is controlled in the vapor space D.

The distribution line 1.9 and at least a portion of the feed line 1.8 are formed from a thermally highly resilient and corrosion-resistant material due to the prevailing in the melt channel 2 temperatures. Here are platinum alloys with a suitable creep rupture strength in particular. An inner diameter of the feed line 1.8 and distribution line 1.9, for example, less than 6 mm, preferably less than 4 mm.

FIG. 2 shows schematically the feed line 1.8 and the distribution line 1.9 of the device 1 as well as a section of a melt-carrying channel 2 of a system component A.

In the present exemplary embodiment, the feed line 1.8 opens vertically into the distributor line 1.9, which extends in the longitudinal direction of the melt leading channel 2 parallel to the outer wall 2.1 and extends over the length of the section shown, wherein the length of the distribution line 1.9 adapts to a length of the section. In particular, a length of, for example, one meter is given as the maximum length of the distribution line 1.9. If the section is longer than the predetermined length, a plurality of distribution lines 1.9 are arranged, which are each part of a device 1, so that a plurality of devices 1 are arranged, as shown by way of example in FIG.

The distribution line 1.9 has over its entire length regularly arranged openings (not shown in detail), which in a wall of the - -

Distribution line 1.9 are introduced in one of the outer wall 2.1 of the melt-leading channel 2 facing region and through which the vapor-gas mixture DGG can escape to form a vapor-containing gas atmosphere along the outer wall 2.1. The openings are arranged at a distance of, for example, 10 mm to 60 mm, preferably 20 mm to 40 mm from each other. Near the junction of the feed line 1.8 in the

Distribution line 1.9, the distances between the openings may be larger. The individual openings each have a diameter of, for example, 2 mm to 5 mm.

The vapor-gas mixture DGG emerges from the openings as a laminar flow and preferably distributes itself uniformly over the circumference of the outer wall 2.1 and thus generates a gas-containing vapor atmosphere on the outer wall 2.1. If the outer wall 2.1 has corrugations, these support the distribution of the vapor-gas mixture DGG on the outer wall 2.1.

The steam-containing gas atmosphere generated along the outer wall 2.1 allows the avoidance or at least reduce the formation of oxygen bubbles on an inner wall 2.2 of the melt-leading channel 2, which is provided with a refractory material and which melt, z. B. a molten glass, facing. A temperature of the melt is, for example, in a range between 1200 ° C and 1700 ° C or partially beyond, where - as already mentioned - hydrogen ions dissociated and over the outer wall 2.1, which with a metal layer, in particular with a layer of platinum or a platinum alloy is allowed to diffuse out. At the

Inner wall 2.2 remains oxygen from the water content of the melt and forms this undesirable air bubbles.

By means of the vapor-containing gas atmosphere, the outdiffusion of dissociated hydrogen ions can be avoided or at least reduced. - -

For optimum distribution of the vapor-gas mixture DGG along the outer wall 2.1, the distribution line 1.9 is arranged at a small distance from the outer wall 2.1 between it and an inner heat insulation 3.2. The inner heat insulation 3.2 surrounds the outer wall 2.1 annular and seals so the melt-leading channel 2 at least thermally to the outside. The inner heat insulation 3.2 usually has a lower insulation than the outer heat insulation 3.1.

Between the outer wall 2.1 and the distribution line 1.9, a gas-permeable separating layer 1.10 is arranged, which is formed by a thin, refractory and gas-permeable material. As a material here are z. As a ceramic fiber mat, a textile or other fiber composites. Also conceivable are porous and refractory materials which prevent direct contact between the distribution line 1.9 and the outer wall 2.1.

For example, materials of alumina, z. B.

Hollow spherical corundum in which sufficient porosity is required to allow the vapor-gas mixture DGG to pass to the outer wall 2.1. A maximum layer thickness of the release layer 1.10 is specified as 20 mm.

For reasons of clarity, the separating layer 1.10 is not shown in the present embodiment. FIG. 10 shows by way of example the

Separating layer 1.10.

The high gas permeability of the separating layer 1.10 compared to the internal thermal insulation 3.2 enables optimum alignment of the laminar flow of the vapor-gas mixture DGG and thus complete wetting of the outer wall 2.1 with the vapor-gas mixture DGG. As a result, the inner heat insulation 3.2 acts similar to a housing for channeling the steam-gas mixture DGG to the outer wall 2.1 of the melt leading channel second - -

The separating layer 1.10 as well as all other components of the device 1, which are arranged in contact with the outer wall 2.1 or in their immediate vicinity, expediently contain no or only significantly low

Impurities that can damage the outer wall 2.1. These include impurities consisting of carbon, sulfur, silicon, boron,

Aluminum, phosphorus, arsenic, iron, etc.

This is due to the fact that platinum with many metals forms low-melting eutectics, which lead to chemical and / or mechanical damage to the platinum. By reducing conditions on the platinum or the adjoining materials can promote alloy formation and damage to the platinum can be caused to the formation of holes.

Figure 3 shows schematically an embodiment of a plant component A with a melt-carrying channel 2 and a plurality of devices 1. The plant component A is generally for use in chemical

Plant construction and in particular for the production of glasses provided.

The melt-carrying channel 2 is subdivided into several sections, each section forming an assembly Bl to B4 of the system component A and each module Bl to B4 is associated with at least one device 1.

In the exemplary embodiment shown, a first assembly Bl is supplied from an unillustrated smelting unit to an inorganic, nonmetallic melt. The first assembly Bl serves for the thermal influence of the supplied melt and is provided with a

Device 1 coupled.

A second assembly B2 represents a so-called lauter cell, in which a refining and degassing of the inorganic, non-metallic melt at a high temperature and a reduced flow rate of the

Melting takes place. For the second assembly B2 are due to a relation to the - -

first assembly Bl greater length of the melt leading channel 2, z. B. a length of 2 m, for example, two devices 1, each with a

Distribution line 1.9 provided, with a respective length of the

Distribution lines 1.9 preferably not greater than 1 m. In general, it can be said that, starting from a length of the melt-guiding channel 2 of greater than 0.8 m, a plurality of devices 1 are provided.

A third assembly B3 represents a cooling tube and serves a controlled cooling of the inorganic, non-metallic melt except one

Temperature near a processing temperature. Since here the melt-leading channel 2 is very long compared to the first assembly Bl, two devices 1 are also provided here.

A fourth assembly B4 provides a so-called feeder head with a

Dosing device B4.1, wherein the feeder head with the

Dosing device B4.1, for example, as a drop feeder for a

Blowing machine or as a pressing machine for shaping the inorganic, non-metallic melt or as a feeder head for a pipeline, z. B. a Danner tube, is formed.

In the area of the metering device B4.1, the melt-carrying channel 2 runs vertically and thus perpendicular to the melt leading channel 2 of above the metering device B4.1 arranged portion of the fourth module 4 and the other modules Bl to B3.

In this case, three devices 1 are assigned to the fourth module B4, only one of which is shown in the present exemplary embodiment. The other devices 1 are shown in Figure 8 and are associated with the feed head.

The distribution line 1.9 surrounds the outer wall 2.1 of the vertically extending portion of the melt-leading channel 2 annularly, wherein the supply of the vapor-gas mixture DGG here also via openings in the - -

Distribution line 1.9 is supplied by a separating layer 1.10 of the outer wall 2.1. A section of such a distribution line 1.9 is shown in FIG.

If the vertically extending portion of the melt-guiding channel 2 is longer than shown in the embodiment, then a plurality of devices 1 is provided, wherein the individual distribution lines 1.9 are arranged at a distance of 500 mm from each other.

Furthermore, each module Bl to B4 and thus each section of the melt leading channel 2 at least two Stromführungsflansche 2.3, which are not shown in the present embodiment for reasons of clarity. However, these current-carrying flanges 2.3 are shown schematically in FIGS. 7 and 8 by way of example.

In addition, the assemblies Bl to B4 are surrounded by the heat insulation 3, which consists of the inner heat insulation 3.2 and the outer

Heat insulation 3.1 is formed, wherein for reasons of clarity, only the heat insulation 3 is shown here. The heat insulation 3 may alternatively consist of more layers.

In summary it can be said that concentrically around the

Assemblies Bl to B4 arranged thermal insulation 3.1, 3.2 together with the Stromführungsflanschen 2.3 similar to a housing the access of outside air to the outer wall 2.1 at least greatly hindered or completely prevented.

The assemblies Bl to B4 are hereby exemplary special embodiments of the system component A, without excluding other variants of modules, as they are known in chemical technology. - -

Decisive for the application of the device 1 according to the invention is formed from a noble metal, in particular platinum or platinum alloys outer wall 2.1 of the melt-leading channel 2, which leads the inorganic, non-metallic melt and a need for the outer wall 2.1 of the melt leading channel 2 or in a Chamber of the plant component A to provide a vapor-containing gas atmosphere.

The steam-gas mixture DGG to be fed to the outer wall 2.1 is selected in such a way that no reducing conditions occur on the outer wall 2. 1 containing the platinum

Outer wall 2.1 can damage by unwanted alloying.

Figure 4 shows schematically a section of a system component A, wherein the distribution line 1.9 and the feed line 1.8 are arranged at an angle of not equal to 90 degrees to each other. The distribution line 1.9 runs parallel to the longitudinal direction of the melt leading channel. 2

For better illustration here the distribution line 1.9 and the feed line 1.8 are shown in relation to a larger diameter.

The angle between the. Shown in the present embodiment

Distribution line 1.9 and the feed line 1.8 is selected such that the distribution line 1.9 at a distance of only 10 mm to 20 mm parallel to

Outer wall 2.1 of the melt-leading channel 2 runs.

Between the outer wall 2.1 and the distribution line 1.9 is here - as described above - a release layer 1.10 (not shown here) arranged.

Figure 5 shows an arrangement of the distribution line 1.9 and the feed line 1.8 similar to the embodiment shown in Figure 4, wherein the

Distribution line 1.9 and the feed line 1.8 are shown isolated. - -

FIG. 6 shows a schematic illustration of a detail of a ring-shaped distribution line 1.9, as shown in FIG

Dosing device B4.1 is shown.

In this case, the outer wall 2.1 of the melt-leading channel 2 in the fourth assembly B4 of two semi-circular extending

Distribution lines 1.9 or enclosed by an annular distribution line 1.9.

Figure 7 shows a section of an embodiment of a

Plant component A with a portion of a melt-leading channel 2 with two Stromführungsflanschen 2.3, a the outer wall 2.1 of the melt leading channel 2 surrounding inner heat insulation 3.2, the inner heat insulation 3.2 surrounding outer heat insulation 3.1 and a

Device 1, wherein the distribution line 1.9 in the region of the inner

Heat insulation 3.2 is arranged.

The device 1 is partially arranged in the outer heat insulation 3.1, so that a liquid temperature in the container 1.1 is reached between 5 K to 60 K below a boiling point. For water as liquid F, a suitable fixed value between 40 ° C and 95 ° C can be selected to adjust the vapor stream taking into account the carrier gas flow and the amount of liquid delivered.

The device 1 is arranged in such a way in the outer heat insulation 3.1, that a vaporized amount of liquid per unit time is less than 0.1 1 / h. The adjustment of the amount of liquid per unit time is also taking into account the volume flow of the carrier gas G. A minimum strength of the volume flow of the carrier gas G is required to be able to transport enough steam. In this case, a particularly high vapor content in the vapor-gas mixture DGG is advantageous because it reliably prevents the diffusion of hydrogen through the outer wall 2.1 to the outside - -

becomes. As a result, an uncomplicated regulation and control of the currents of the carrier gas G and the vapor-gas mixture DGG is possible. On the other hand, an excessively large carrier gas flow could unduly reduce the vapor content.

The Stromführungsflansche 2.3 serve to hinder the outflow of the vapor-gas mixture DGG from the area near the outer wall 2.1 to the outside. For this purpose, the heat insulation 3, in particular the inner heat insulation 3.2 is brought very close to the respective Stromführungsflansch 2.3 and acts as a not completely sealing housing. A small gap between the inner heat insulation 3.2 and the Stromführungsflanschen 2.3 is not completely avoidable anyway in a tempering of the system component A.

Due to the small size of the gap between the respective

Stromführungsflansch 2.3 and the inner heat insulation 3.2 is already a small stream of steam-gas mixture DGG sufficient to a

to ensure steam-containing gas atmosphere on the outer wall 2.1. One end of the distribution line 1.9 is in each case arranged at least 10 mm to 20 mm in front of an inner end face of the current-carrying flange 2.3, as shown in FIG.

The leadership of the flow of the vapor-gas mixture DGG between the outwardly sealing inner heat insulation 3.2 and the outer wall 2.1 outward towards the Stromführungsflansche 2.3 has a significant impact on the fact that the outer wall 2.1 over its circumference and the length completely with the Steam-gas mixture DGG is wetted.

Furthermore, a sufficiently large flow pressure of the carrier gas G is required to prevent the ingress of outside air into the gap between the

Outside wall 2.1 and the inner heat insulation 3.2 to prevent safe. A consumption of the vapor-gas mixture DGG via a chemical reaction does not take place, so that the steady presence with sufficient vapor pressure is sufficient. - -

When using a non-oxidizing carrier gas G, such as. As noble gas or nitrogen, may result as a result of the displacement of the atmospheric oxygen as a side effect a reduction of platinum losses on the outer wall 2.1. These losses are higher, the higher the temperature of the outer wall is 2.1.

Figure 8 shows the embodiment of the system component A analogous to Figure 7 with the difference that here the device 1, in particular the container 1.1 is further arranged within the outer heat insulation 3.1.

This illustrates the possibility of having an impact on the

Liquid temperature in container 1.1 and thus to take the proportion of steam in the vapor-gas mixture DGG.

The greater the proportion of the device 1, in particular of the container 1.1, which dips into the outer heat insulation 3.1, the higher becomes the

Liquid temperature in the container 1.1. In addition, by the mechanical adjustment of the device 1, an ambient temperature and ambient flow can be changed, which also have an influence on the liquid temperature in the container 1.1.

FIG. 9 shows a section, in particular a cross section through the fourth assembly B4 according to FIG. 3 in the region of the feeder head.

Due to the arrangement of the metering B4.1, the positioning of the distribution line 1.9 is not possible as in the other modules Bl to B3. This also applies to large diameters of a melt-leading channel 2 above 200 mm.

Here, two devices 1 are provided, so that in the viewing direction left and right, a distribution line 1.9 is arranged to ensure the most complete possible wetting of the outer wall 2.1 with the vapor-gas mixture DGG. - -

Furthermore, the thermal insulation 3 in this case comprises an additional average heat insulation 3.3, which is arranged between the inner heat insulation 3.2 and the outer heat insulation 3.1.

FIG. 10 shows a detail of a melt-carrying channel 2 with a distribution line 1.9 and a gas-permeable channel

Separating layer 1.10. Shown are in particular a lower half of the melt-leading channel 2, the inner heat insulation 3.2, the distribution line 1.9 between the outer wall 2.1 and the inner heat insulation 3.2 and the gas-permeable separating layer 1.10.

- -

LIST OF REFERENCE NUMBERS

1 device

1.1 container

1.2 liquid supply line

1.3 liquid container

1.4 pump

1.5 gas supply line

1.6 Gas storage tank

1.7 gas supply

1.8 supply line

1.9 distribution line

1.10 separating layer

2 melt leading channel

2.1 outer wall

2.2 inner wall

2.3 Current carrying flange

3 heat insulation

3.1 external heat insulation

3.2 internal heat insulation

3.3 average heat insulation

A system component

Bl to B4 assembly

B4.1 dosing device

D steam room

DGG vapor-gas mixture

F liquid

G carrier gas

P level

Claims

P A T E N T A N S P R E C H E

Device (1) for generating a vapor-containing gas atmosphere on an outer wall (2.1) and / or inner wall (2.2) of a melt-carrying channel (2) or in a space of an installation component (A)

- A container (1.1) for receiving a liquid (F) and a

Carrier gas (G), wherein in the container (1.1) a vapor space (D) is formed, in which the carrier gas (G) with a liquid vapor to form a vapor-gas mixture (DGG) is mixable and

- At least one distribution line (1.9) for distribution of the vapor-gas mixture (DGG) along the outer wall (2.1) and / or

Inner wall (2.2) or in the room of the system component (A).

Device (1) according to claim 1, wherein the carrier gas (G) is from a

Gas storage tank (1.6) via a gas supply line (1.5) in the

Steam space (D) of the container (1.1) can be fed.

Device (1) according to claim 1 or 2, wherein the liquid (F) from a liquid reservoir (1.3) via a liquid supply line (1.2) in the container (1.1) until it reaches a predetermined level (P) can be filled.

Device (1) according to claim 3, wherein the vapor space (D) is formed above the level (P).

Device (1) according to one of the preceding claims, wherein the distribution line (1.9) has a plurality of openings which are introduced into a wall of the distribution line (1.9) and via which the vapor-gas mixture (DGG) from the distribution line (1.9 ) is herausführbar.

6. system component (A), comprising

- At least one melt-conducting channel (2) with a

Outer wall (2.1) and one of the melt facing

Inner wall (2.2) and

- At least one device (1) according to one of the preceding claims.

7. plant component (A) according to claim 6, wherein

- The outer wall (2.1) of the melt-leading channel (2) is provided with a noble metal layer and

- The inner wall (2.2) of the melt-leading channel (2) is provided with a refractory material.

8. plant component (A) according to claim 6 or 7, wherein between the

Distribution line (1.9) and the outer wall (2.1) of the melt-leading channel (2) a gas-permeable separating layer (1.10) is arranged.

9. plant component (A) according to any one of claims 6 to 8, wherein the

Distributor line (1.9) in the direction of a longitudinal extent of the melt-leading channel (2) parallel to the outer wall (2.1).

10. plant component (A) according to one of claims 6 to 8, wherein the

Distribution line (1.9) at least partially in the circumferential direction of the outer wall (2.1) of the melt leading channel (2).

11. Plant component (A) according to one of claims 6 to 10, wherein the

Melt leading channel (2) has at least two the channel (2) frontally limiting Stromführungsflansche (2.3).

12. Plant component (A) according to any one of claims 6 to 11, wherein the

Melting channel (2) is surrounded by a thermal insulation (3) consisting of at least one internal thermal insulation (3.2) and one external

Heat insulation (3.1) is formed.

13. Plant component (A) according to claim 12, wherein the container (1.1) is at least partially disposed within the outer heat insulation (3.1).

14. Plant component (A) according to claim 12 or 13, wherein in each case between a melt leading channel (2) facing the end face of Stromommhrungsflansches (2.3) and the inner heat insulation (3.2) is formed a gap.