DE202009018860U1 - Device for purification - Google Patents

Abstract

Device (1) for refining in the brewing process with a separation container (2) comprising a mash feed line (3) and a wort discharge line (4), characterized in that the separation container (2) is assigned a device (5) for introducing gas, which is used to generate a Gas bubble stream (28) is formed in a liquid in the separation container (2).

Description

The invention relates to a device for refining in the brewing process with a separation vessel comprising a mash feed line and a wort removal line.

An important step in the brewing process is the so-called refining process. The mash formed after maceration, a suspension of wort and undissolved solid particles such as malt residues, in particular husks, is filtered to separate the wort as the continuous phase from the solid particles, the disperse phase. The clarity of the filtered wort, from which the beer is produced later, and the duration of the refining process are decisive quality criteria.

To carry out the refining process, the mash is poured into a separation tank. The separation vessel, also called lauter tun, comprises a slotted bottom, the so-called false bottom, which separates the non-filtrate space from the filtrate space. The actual bottom of the separation tank forms a tub bottom, which is provided with a plurality of terminals arranged at defined intervals. About these connections the filtered wort is removed and passed to the next step of the brewing process, namely wort boiling.

The false bottom has a central importance for the success of the refining process. The false bottom has less the function of a filtering element, but rather forms the support structure for the resulting from the sinking solid particles filter cake. The forming filter cake is divided - in simplified terms - into a fine layer and into a coarse layer, whose components are the rather small or rather large solid particles from the mash.

At the beginning of the refining process, the mash is filled into the separation tank. After filling, the mash comes to rest in the separation tank. One speaks of the so-called lauter peace. During the lautering, the individual particles and solid units settle more slowly or more rapidly according to their respective sedimentation properties. It forms on the false bottom of a filter cake in which at the bottom of the coarse particles (coarse layer) are positioned and deposited at the top of fine particles (fine layer). Subsequently, the actual solid-liquid separation takes place, in which the wort is removed after passing through the filter cake.

During the refining process, the volume flow of wort passing through the filter cake changes in an undesirable manner. The volume flow of wort decreases steadily throughout the refining process, since the filter cake is gradually blocked by very fine particles in the course of the process. Nevertheless, in order to obtain as much wort per unit of time as possible and thus to keep the refining time as short as possible, a so-called chipper is conventionally used in the separation vessel. Such a chipper is mounted inside the separation vessel and consists, for example, of a number of knives which can rotate in the separation vessel. To increase the volume flow of wort, the chipper is lowered from the unfiltered space into the filter layer. The knives break the filter cake by rotation, which increases the volume flow of wort. However, this process takes place at the expense of wort quality, as with the tearing of the filter layer and fine particles that are negative for the wort and further processing, are carried along. Through the process of chopping the wort experiences an undesirable haze.

Another important step in the brewing process is the so-called wort boiling. The wort, which is separated from malt residues after mashing, is boiled in a wort or brewing pan with the addition of hops. By cooking unwanted flavors are expelled, while remaining essential for the taste of the beer flavorings remain in the wort. The desired flavorings usually show a lower vapor pressure than the unwanted, so that depleted flavor undesirable flavoring during wort boiling in the wort. In addition, some flavorings during the wort boiling an education kinetics of a starting material.

The process of wort boiling is of crucial importance insofar as this creates a specific beer-grade flavor profile for the beer to be produced. In addition to the usual ability to influence the content of the flavoring agents in the wort and thus in the final beer by evaporation during the cooking phase, methods are also known, wherein undesirable flavorings are depleted by a treatment of the wort by a stripping process or by means of a rectification , A significant flavoring agent, which is an important parameter for wort boiling and is considered as a measure of the evaporation quality, is the flavoring agent dimethyl sulfide (DMS), which is used in wort boiling, in particular at temperatures above 80 ° C., from the wort present in the wort. Methyl methionone (SMM) is formed.

While in a conventional wort boiling all SMM is converted into DMS and the latter is driven out of the wort due to its high vapor pressure, remains at one short wort boiling or in an alternative treatment of the wort by means of a stripping or by means of a rectification process SMM in the wort, so that there is a risk of new formation of DMS in successor processes. Ultimately, however, DMS must always be driven below a threshold of 100 μg / l due to the negative taste impression.

The object of the invention is to further improve the brewing process in terms of process economy.

The stated object is achieved for a device for refining in the brewing process with the features according to the preamble of claim 1 according to the invention that the separation vessel is associated with a device for gas introduction, which is designed to generate a gas bubble stream in a liquid located in the separation vessel.

The invention makes it possible for the liquid in the separation vessel to flow through a gas bubble stream during the refining process.

Further advantageous embodiments can be taken from the subclaims.

The invention is based on the idea of providing a favorable influence on the aroma substance profile already during the refining process. In this way, the subsequent process of wort boiling can be shortened, which leads to a considerable reduction of the energy requirement. In particular, this can significantly alleviate the educational problem of DMS from SMM in subsequent work steps. For this purpose, the invention recognizes that an influencing of the aroma substance profile during the refining process can be achieved by means of a desorption which shows even further advantages. In the present case, the superordinate principle of desorption describes a liquid-side depletion of an undesirable flavor component by enrichment of this substance in a gas phase.

If the filled in the separation vessel liquid, d. H. the mash on the unfiltrate side and / or the wort on the filtrate side, flows through gas bubbles, so there is a significant concentration gradient between a gas bubble and the surrounding liquid for a flavoring component. For example, a gas bubble consisting of pure nitrogen has a partial pressure of zero with respect to the content of water and a central flavor component such as DMS. Striving to reach the state of equilibrium, the temperature and the pressure equalize in both phases (liquid and gas). Likewise, the chemical potentials of a flavoring agent to be considered in both phases are compensated by mass transfer. The concentration of the flavor in the gas bubble increases according to the prevailing phase equilibrium. As it flows through the liquid, the gas bubble will gradually accumulate in water and flavor. At the time of the escape on the liquid surface, the gas in the gas bubble can be in particular in equilibrium with the wort and thus be saturated with water and aroma.

The invention is not limited to the nature and location of the introduction of the gas bubble stream. In particular, since gas bubbles rise due to the density difference with respect to the surrounding liquid, the residence time in the liquid of the separation tank can be adjusted via the vertical location of the introduction. In particular, the gas bubble stream can insofar already be introduced into it during the inflow of the mash. Also, the gas bubble stream can be introduced downstream of the filter cake in the discharged wort. An introduction of the gas bubble stream is possible in both countercurrent and in the DC direction. In particular, the gas bubble stream can also be introduced simultaneously or with a time delay at a plurality of locations distributed in the separation vessel. Overall, the introduction can be chosen so that the escaping gas bubbles are in thermodynamic equilibrium with the surrounding liquid. Likewise, in order to achieve a desired flavor profile, it may also be provided to design the residence time of the gas bubbles in such a way that the thermodynamic equilibrium when the gas bubbles exit at the liquid surface has not yet been reached.

The optimum residence time for achieving a desired aroma substance profile, apart from the vertical introduction location, essentially depends on the substance properties of the aroma to be expelled, the resulting phase equilibrium, the liquid volume and the average gas bubble size. In an advantageous embodiment of the method, it is therefore provided to predict the residence time desired for given external conditions to achieve a defined flavor profile and to design the introduction of the gas bubble stream accordingly. For this purpose, for example, pressure and temperature of the gas bubble gas to be introduced for the gas to be controlled. Also, a distribution device may be provided which has defined pores for introducing the gas bubble stream. From an interaction of mechanical components, material parameters and Einbringort can be taken so far reference to the desired residence time.

The invention offers in addition to the depletion of undesirable flavorings from the wort the further significant advantage of the possibility of influencing the forming in the separation vessel filter cake. In fact, the gas bubbles flowing through have an effect on the surrounding liquid (mash and / or wort) and thus indirectly on the forming filter medium. For example, if the gas bubble stream flows through the mash in the unfiltered space of the separation tank, the effect of the so-called flotation occurs. As a result of surface-physical effects, during the flow through this process, ultrafine solid particles from the liquid increasingly accumulate on the surface of the gas bubbles and are transported by these to the liquid surface. There, the entrained particles with the rising bubbles form a particle foam. The entrained particles are thus no longer available for training and influencing the filter cake.

Due to the effect of the flotation, in particular even very fine particles are separated from the mash, which, for example, can clog the filter cake. In this respect, the quality of the filter cake can already be favorably influenced by introducing a gas bubble stream into the non-filtrate space, without the filter cake being directly affected by the gas bubble stream.

On the other hand, however, the invention also offers the additional possibility of influencing the filter cake directly by introducing the gas bubble stream. For example, by passing the gas bubbles through the filter cake blocking of the filter channels can be prevented, as is done gradually during a conventional refining. Due to the volume flow of the filter cake through the leaking gas bubbles, the filter channels can be kept free, since the filter channels zusetzenden solid particles are entrained by the kinetic energy of the gas bubbles. In particular, the invention offers the advantage that, when passing through the gas bubble stream through the filter cake, it may be possible to dispense with a chipper. In contrast to a chipper, the passage of a gas bubble stream through the filter cake does not lead to turbidity and thus to a loss of quality of the discharged wort. The entrained solid particles move against gravity and thus not into the discharged wort.

Advantageously, according to an embodiment variant, at least a portion of the gas bubble stream is thus passed through the filter cake for keeping clear and / or for making it through.

Overall, the invention thus provides three important advantages for optimizing the process economy in a brewing process.

Desorption enriches unwanted aroma substances during the flow through the gas bubble stream in the gas bubbles. Since these usually have a higher partial pressure than desired flavorings, the desorption acts in the direction of the desired Flavoringoffprofils. The wort thus treated has so far only after the refining process only a little to no content more undesirable flavors. This shortens the process time in the subsequent wort boiling.

A flotation process leads to a separation of particles on the liquid surface of the gas bubbles flowing through or rising. This counteracts a blockage of filter channels in the filter cake and an undesirable turbidity of the discharged wort.

If at least part of the gas bubble stream is passed through the filter cake, then due to the kinetic energy of the rising gas bubbles, filter channels of subsiding solid particles can be kept free. On a mechanical chopping the added filter cake can be omitted. Solid particles are not introduced into the discharged wort.

Overall, therefore, the invention makes it possible, in the case of a shortened refining process, to obtain a wort which has already been depleted of undesirable flavors, and which does not differ qualitatively in terms of ingredients and color from wort obtained by conventional methods or is even improved.

The invention can be advantageously further varied with respect to the timing of the gas supply. In particular, the supply of gas for generating the gas bubble stream can be carried out with the beginning of the introduction of the mash into the separation vessel, after the lautering and / or at the time of reduced by adding the filter cake volume flow of wort. These variations allow a controlled influence on the quality and functioning of the filter cake.

An early introduction of the gas bubble stream strongly influences the forming structure of the filter cake. A later supply is important in terms of the freedom of the filter channels. Is the delivery of the Gas bubble stream downstream of the filter cake, it can be introduced in a suitable embodiment of the gas bubble stream during the refining and discontinuous to desired process times. In particular, the gas bubble stream can also be introduced at different process times with different physical parameters. For example, at the beginning of the lautering, the gas bubble stream can be introduced optimally with regard to flotation. For opening the filter channels in the filter cake, however, the gas bubble stream can be introduced at a higher pressure or with larger bubbles in order to open the added flow channels.

Preferably, additionally or alternatively to a variation of the time point of the gas supply line, the volume flow of the gas supply can be varied. Different volume flows influence all three described effects. A low volumetric flow rate is accompanied by evaporation of unwanted aroma substances which protects the filter layer, a deblocking of the filter channels with respect to ultrafine particles and weak flotation. For seasonings with low wort content and concomitantly lower levels of solids in the mash, this process is interesting.

For condiments with high extract contents, use a stronger volume flow. This causes a loose filter cake and associated larger filter channels. The flotation effect is very pronounced and the expulsion of undesirable flavors is forced. However, the predictability of the desorption process is difficult because, due to the short residence time of a bubble, gas and liquid mass transport processes influence the separation process. Depending on diffusive and fluid mechanical processes, the expulsion of an undesirable aromatic component may improve or degrade as compared to a desired component. As a result, the predictability of the process becomes more difficult and no longer follows the phase equilibrium of a mixture alone.

Further advantageously, short interruptions of the gas supply can take place during the process control. Taking into account the aforementioned effects, this can be used to further optimize the process control.

To influence the structure of the filter cake, the gas supply can take place directly at the location of the forming filter cake. For this purpose, for example, a distribution device may be provided on the false bottom.

In an advantageous development, at least part of the gas bubble stream flows from the filtrate space through the filter cake into the non-filtrate space. With such a procedure, the process control can specifically influence the flavor profile and the quality of the wort removed. This unwanted flavorings are depleted during the passage through the gas bubbles by the expiring wort in the filtrate and through the mash in Unfiltratraum. By flotation fine particles are taken to the surface of the liquid. The filter cake can be kept open by means of the gas bubble stream flowing through.

To initiate the gas bubble flow is advantageously provided by a pore having distribution device. This can be designed, for example, in the manner of a pervator or a shower head. Due to the pore size, this determines the size of the gas bubbles to a certain extent. Preferably, as such a distribution device may be provided a frit, which is made of a porous glass or of a porous ceramic.

To adjust the gas bubble flow, the pressure, the temperature and / or the volume flow of the inflowing gas is advantageously controlled. This can be done for example by means of a pressure regulator and a corresponding tempering. The tempering device can be designed in particular as a heating and / or as a cooling device. The volume flow can be adjusted via corresponding valves.

For the above-described variation of the gas bubble flow during the refining process, the pressure, the temperature and / or the volumetric flow of the supplied gas during the refining process are varied in a further preferred embodiment.

In a further expedient embodiment, the gas is passed through water before being introduced into the separation vessel. As a result, there is already a pre-saturation of the gas with water. Thus, an influence of the extract content of the resulting wort by a reduction of the liquid content (water content) due to the passage of the gas bubble stream is not given.

The physical effects described can be attenuated or increased by adjusting the volume flow during the gas supply, the temperature, the pressure, and, depending thereon, the size of the gas bubbles. The gas bubble stream is preferably introduced in a location-dependent, continuous or time-divisional manner in such a way that the flotation process is intensified, with very fine particles emerging from the liquid at the surface of the Apply gas bubbles, ascend with them and deposit on the mash surface. The flotation process can be intensified, for example, by increasing the size of the gas bubbles or the volume flow.

On the other hand, the gas bubble stream can be introduced in a location-dependent, continuous or time-wise manner in order to optimize the desired flavor profile in the wort such that undesirable aroma substances of the wort are absorbed by desorption in the rising gas bubbles and depleted in the wort to achieve a desired flavor profile. By appropriate control, reference can be made to the residence time, the pressure and the temperature of the gas bubbles. In this respect, the degree of depletion for individual flavor components can be adjusted or varied to the desired extent. In particular, it can be achieved that the wort obtained by the refining process, in a good approximation, no longer contains any free DMS.

Again, the gas bubble stream can be introduced in a permanent, time-sequential or varying manner of the introduction site in such a way that filtration paths through the filter cake are flowed through and thus a closure of the filtration paths by particles is prevented. To increase the permeability of the filter cake, this optimization can be carried out discontinuously at certain times. On the other hand, the gas bubble stream can also be continuously passed through the filter cake during the entire refining process and the process parameters can be optimized in stages.

Appropriately, the device for gas introduction comprises a compressed gas line, which opens into the separation tank. The compressed gas line can be connected in particular to a compressor or to a compressed gas cylinder. As a suitable gas, for example, atmospheric nitrogen, pure nitrogen, carbon dioxide or a noble gas can be used. In particular, offers air nitrogen, since it can be obtained from air on site. The gas used need not necessarily be an inert gas, since optionally a reaction with the particular undesirable flavorings can also be advantageously used. Of course, the use of an inert gas may be preferred to avoid entry into the wort.

Preferably, the compressed gas line has a pressure regulator for adjusting the gas pressure and / or a valve for adjusting the volume flow. For controlling the temperature of the inflowing gas, a tempering device which can be designed as a heating and / or cooling device is furthermore preferably included.

In a further advantageous embodiment, the separation vessel comprises a Unfiltratraum for receiving mash, a false bottom to form a filter cake and a Filtratraum downstream of the sinker. In this case, the compressed gas line to a number of separate supply lines, wherein a supply line in the unfiltrate, a supply line immediately upstream of the sinker and a supply line opens into the filtrate, and wherein in addition a number of controllable valves for introducing the gas flow is provided in the supply lines.

Such a device offers the advantage of optimally varying both the location and the physical parameters of the gas bubble stream, even during the refining process. For example, the gas bubble stream during the filling of the mash in the unfiltered space, then in the filtrate and sections to the Durchstiegmachung the filter cake are introduced directly to this. In a preferred embodiment, the supply lines are each assigned means for the separate adjustment of the parameters of the gas bubble flow, such as pressure, temperature or volume flow.

Conveniently, a control device for controlling the pressure and / or the volume flow of the supplied gas, in particular for controlling the gas flow in the supply lines, formed and arranged. In this case, the control device is preferably set up to vary the pressure, temperature and / or volumetric flow of the supplied gas, in particular the gas flow in the branch lines during the refining process.

An embodiment of the invention will be explained in more detail with reference to a drawing. It is in the only one 1 schematically illustrated an apparatus for refining the mash in a beer brewing process.

The device 1 for carrying out a refining process comprises a separation vessel 2 to which a mash supply line 3 and a wort removal line 4 are connected. Next is the separation tank 2 An institution 5 assigned to a gas supply line. At the beginning of the process, the mash supply line is used 3 the after mashing still warm mash 6 into the separation tank 2 up to a certain mash level 7 filled.

At the bottom of the separation tank 2 is a false bottom 8th arranged, which has a number of through slots, on the filtered liquid, namely the wort 15 , can expire. The actual container bottom forms the tub bottom 9 . the over a number of connections 10 into the wort discharge line 4 empties. During the refining, the solid particles settle out of the filled mash 6 on the false bottom 8th and form a filter cake with a characteristic structure of fine and coarse particles 11 , about the more solid particles from the mash 6 be withheld. The through the filter cake 11 filtered wort 15 is about the connections 10 withdrawn and represents the basic input product for beer production dar. The separation vessel 2 itself is over a hood 13 completed, via a steam exhaust 14 features.

In a refining process according to the state of the art, the volume flow of the wort increases with the duration of the process 15 off, because the filter cake 11 blocked in the process by solid particles. In that respect, a hacking must 16 introduced, which has rotatable blades, in the filter cake 11 can be submerged. After mechanical opening of the blocked filter cake 11 An acceptable volume flow of wort is created again 15 , About the entrained solid particles from the mash 6 However, an undesirable turbidity of the wort occurs 15 one.

The filter cake 11 separates in the separation tank 2 generally a Unfiltratraum 12 in which the mash 6 as a suspension from the wort 15 and the undissolved particulate matter is from a filtrate space 17 in which the wort filtered off as a continuous phase 15 is present.

To speed up the refining process, without the spilled wort 15 suffers a loss of quality is the separation tank 2 the device 5 assigned to the gas supply. The device 5 for gas supply includes a compressed gas line 18 over which by means of a number of separate supply lines 19 . 20 . 21 the separation tank 2 a pressurized gas can be supplied. In the present case, nitrogen obtained as gas from air is used.

The locally obtained nitrogen is first in a compressed gas tank 24 introduced and then flows through to saturation with H ₂ O a water-filled water tank 25 , The saturated with water nitrogen then flows into the compressed gas line 18 and passes over the supply lines 19 . 20 . 21 at each different locations in the liquid within the separation vessel 2 ,

The respective supply lines 19 . 20 . 21 each lead into a specifically trained distribution device 27 which is equipped with fine pores. About these pores of the accelerating gas stream is divided so that in the liquid inside the separation vessel 2 at the place of gas injection in each case a gas bubble stream 28 created from fine gas bubbles. For example, the supply line opens 19 in a distribution device 27 which is designed as a ceramic frit. On the other hand open the supply lines 20 . 21 each in distribution devices 27 , which are designed in the manner of a shower head with a plurality of through holes (as pores).

For splitting the gas flow from the compressed gas tank 24 and for influencing the volume flow and the pressure in the respective supply lines 19 . 20 . 21 is a control device 30 provided with controllable valves 31 . 32 . 33 at the respective supply lines 19 . 20 . 21 connected is. About a controlled opening or closing or adjustment of the valve opening degree of the respective valves 31 . 32 . 33 can be in the supply lines 19 . 20 . 21 set the prevailing volumetric flow and pressure separately. For the basic adjustment of the pressure within the compressed gas line 18 is between the compressed gas tank 24 and the water tank 25 a pressure regulator 34 arranged, also via the control device 30 is adjustable.

Next is the compressed gas line 18 a heating device 35 assigned, via which the temperature of the zueilenden gas within the compressed gas line 18 can be set. This heater 35 is shown schematically, in particular, the heater 35 be realized by the fact that the gas inside the water tank 25 tempered water flows through.

By means of the control device 30 During the refining process, the gas flow in the supply lines 19 . 20 . 21 Controlled process time dependent. For example, at the beginning of the refining process via the supply line 21 comparatively large gas bubbles in the feeding mash 6 brought in. As a result, the flotation process is enhanced so that the filter cake 11 Blocking fines as foam on the surface of the mash 6 deposit. At the same time the over the supply line 20 introduced gas flow adjusted so that the kinetic energy of the escaping gas bubbles is large enough to filter channels in the filter cake 11 to keep it open. In a discontinuous procedure, the gas bubbles are introduced in sections in such a way that even blocked filter channels are blown free.

The supply and control of the gas flow via the feeder 19 It is set that during the residence time of the gas bubbles in the liquid, a thermal equilibrium between the gas bubble and the surrounding liquid is established before it is separated on the surface of the mash in Unfiltratraum again. In this way, unwanted flavorings from the wort accumulate 15 predictably during the ascent of the gas bubbles in these, causing the wort 15 gradually depleted of these undesirable flavors. Because the vapor pressure of the undesirable flavorings in the wort 15 is usually higher than that of the desired flavoring agents, the depletion of the undesirable flavoring agents in the wort is due to the effect of desorption 15 favored.

About the specified facility 5 For gas supply, the refining process can be controlled according to a desired original wort content. On the chipper 16 can be dispensed with appropriate control of the gas flow. The Hackwerk 16 but can in the separation tank 2 remain and allows, especially towards the end of the refining by rotational movements a loosening of the filter cake 11 and thus an increase in the wort flow 15 ,

LIST OF REFERENCE NUMBERS

1

Device for purification

2

separation container

3

mash feed

4

Wort discharge line

5

Device for gas supply

6

mash

7

mash level

8th

false bottom

9

tub floor

10

connections

11

filter cake

12

nonfiltrate

13

Hood

14

steam vent

15

wort

16

hoeing

17

filtrate

18

Pressure gas line

19

supply

20

supply

21

supply

24

Compressed gas containers

25

water tank

27

distributor

28

Gas bubble stream

30

control device

31

Valve

32

Valve

33

Valve

34

pressure regulator

35

heater

Claims (9)

Contraption ( 1 ) for refining in the brewing process with a separation vessel ( 2 ) comprising a mash feed ( 3 ) and a wort removal line ( 4 ), characterized in that the separation tank ( 2 ) An institution ( 5 ) is assigned to the gas inlet, which is for generating a gas bubble stream ( 28 ) in a separation vessel ( 2 ) is formed liquid. Contraption ( 1 ) according to claim 1, characterized in that the device ( 5 ) for gas introduction a compressed gas line ( 18 ), which enters the separation vessel ( 2 ) opens. Contraption ( 1 ) according to claim 1 or 2, characterized in that for gas introduction a pore-comprising distribution device ( 27 ) is provided. Contraption ( 1 ) according to claim 2 or 3, characterized in that the compressed gas line ( 18 ) a pressure regulator ( 34 ) for adjusting the gas pressure and / or a valve ( 31 . 32 . 33 ) are assigned to adjust the flow rate. Contraption ( 1 ) according to one of claims 1 to 4, characterized in that the device ( 5 ) for gas introduction a tempering device ( 35 ) for controlling the temperature of the incoming gas. Contraption ( 1 ) according to one of claims 2 to 5, characterized in that the compressed gas line ( 18 ) in the wort removal line ( 4 ) ends. Contraption ( 1 ) according to one of claims 1 to 6, characterized in that the separation vessel ( 2 ) an unfiltrate space ( 12 ) for receiving mash ( 6 ), a false bottom ( 8th ) for forming a filter cake ( 11 ), and a filtrate space ( 17 ) downstream of the false bottom ( 8th ), that the compressed gas line ( 18 ) a number of separate supply lines ( 19 . 20 . 21 ), wherein a supply line ( 20 ) into the unfiltrate space ( 12 ), a supply line ( 21 ) immediately upstream of the false bottom ( 8th ) and a supply line ( 19 ) into the filtrate space ( 17 ) and that a number of controllable valves ( 31 . 32 . 33 ) for introducing the gas flow into the supply lines ( 19 . 20 . 21 ) is provided. Contraption ( 1 ) according to one of claims 1 to 7, characterized in that a control device ( 30 ) for controlling the pressure, the temperature and / or the volume flow of the supplied gas, in particular for controlling the gas flow in the supply lines ( 19 . 20 . 21 ), trained and furnished. Contraption ( 1 ) according to claim 8, characterized in that the control device ( 30 ), pressure, temperature and / or volume flow of the supplied gas, in particular the gas flow in the supply lines ( 19 . 20 . 21 ) during the refining process.

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