DE10333639B3 - Dialyzer membrane module drying method using microwave energy with simultaneous circulation of rinsing air via membrane module fluid connections - Google Patents

Abstract

The drying method uses a loading device for insertion of at least one Dialyzer membrane module (7) in a microwave oven, with the fluid connections of the membrane module coupled to a rinsing air system, with simultaneous passage of rinsing air and supply of microwave energy over a timed duration, before disconnection of the rinsing air system and removal from the microwave oven. An Independent claim for a drying plant for Dialyzer membrane modules is also included.

Description

The present invention relates to a method for drying membrane modules, in particular Dialyzers, with at least two liquid connections by means of Microwave energy and a system for drying membrane modules, in particular of dialyzers, with at least two liquid connections Microwave energy, with at least one microwave oven, the one Microwave chamber and a microwave generating device for Generating microwaves in the microwave chamber contains, and with a purge air system a purge air supply device and a purge air discharge device.

From the DE 298 02 402 U1 A generic method and a generic device are known. However, this does not enable membrane modules to dry sufficiently quickly.

The invention is therefore the object underlying for an increase the number of dried membrane modules per unit of time. Membrane modules can z. B. filter units used in technical filtration processes (e.g. filter candles) but also in medical technology for filtration or Dialysis of blood used filter units (haemofilter, dialyzer, Plasma separators).

According to the invention, this task is performed by the generic method solved in that at least a membrane module into a by means of a loading device Given microwave oven, by means of a connection device to a purge air system connected, subsequently with simultaneous flow with purge air from the purge air system Microwave energy over suspended for a period of time, subsequently by the purge air system again separated and taken out of the microwave oven.

In addition, this task at generic device solved by that a Loading device for loading the microwave oven with at least one membrane module and a connecting device for connecting the or each membrane module to the flushing system is provided.

In the process can be provided be that one semi or fully automatic loading device is used.

On the other hand, it is also conceivable that a manual operable loading device is used.

According to a particular embodiment of the Invention can be provided that the loading is discontinuous carried out becomes.

Advantageously, at least two membrane modules simultaneously or one after the other in the microwave oven given.

A maximum of twelve membrane modules are expedient placed in the microwave oven simultaneously or sequentially. The Number of membrane modules depends Naturally ultimately available from that standing microwave chamber volume, from the dimensions of the membrane modules and of homogeneity of the microwave field in the microwave chamber.

Five membrane modules are particularly preferred placed in the microwave oven simultaneously or sequentially.

The or each membrane module fixed on or on a load carrier.

In particular, can be provided be that or each membrane module has two rinsing liquid connections and fixed by means of this on or on the load carrier becomes.

It can also be provided that the membrane modules arranged in parallel next to or on top of each other become.

The membrane modules are advantageous arranged at a minimum distance of 1 cm. The minimum distance results from the fact that spread the microwave field between the membrane modules can got to.

According to another special one embodiment The invention can provide that the or each membrane module with one of its fluid connections into one fixed first connection block the connecting device is inserted in the microwave chamber of the microwave oven.

Advantageously, several Membrane modules placed in the microwave chamber and simultaneously each with one of their liquid connections in the first connection block be put. This is in addition to the connection to the purge air system achieved at the same time fixing the membrane modules.

It can be provided that the second connection block is half or is swiveled fully automatically.

According to a particular embodiment the first terminal block with a purge air supply device of the purge air system and the second terminal block with a purge air discharge device of the purge-air in fluid communication.

Advantageously, the second terminal block before removing the membrane module (s) into the second Position swung back.

Furthermore, it can be provided that the microwave chamber has a loading opening which can be closed by means of a door, the loading opening by means of the door in front of the Expose the membrane module (s) with microwave energy and the door is opened again before the removal step.

conveniently, becomes the purge air tempered.

The purge air is advantageously conditioned, z. B. filtered and applied with a certain form.

Purge air admission pressure control is expedient for the or performed each membrane module.

Furthermore, a purge air pre-pressure measurement is convenient for the or performed each membrane module. The purge air pre-pressure measurement allows conclusions to be drawn the lack of membrane modules or the incorrect connection of membrane modules as well as the degree of drying, since the membrane of the membrane module with increasing degree of dryness becomes more permeable.

Furthermore, advantageously be provided that a An alarm is issued when the measured or a measured purge air pre-pressure respective predefinable upper and lower purge air pressure limit over or below.

conveniently, the or each membrane module is weighed before and after drying. It can be said Recognize whether and to what extent the or each membrane module has been dried.

In particular, can be provided be that or the membrane module (s) together with the load carrier of the Feeding device is / are weighed.

Furthermore, the length of time over which the membrane module (s) is / are exposed to microwave energy, be a predetermined period of time.

On the other hand, it can also be provided be that the Time period over which the membrane module (s) is / are exposed to microwave energy, depending on the moisture content is determined. So if e.g. B. the membrane module (s) one has / have a high initial moisture content, the time period longer as usual his.

In the device can be provided be that the Feeding device has a pushable or mobile loading goods carrier.

In particular, can be provided be that in a guide rail for the microwave chamber is provided along which the load carrier can slide or is mobile.

The guide rail is advantageously for Fixing the load carrier designed into an end position.

It can also be provided that the mobile Beschickungsgutträger is self-driving.

conveniently, a linear robot is provided for moving the load carrier.

A manipulator arm can also advantageously be used or robot for loading the load carrier with the membrane module (s) be provided.

According to one embodiment can the loading device for manual loading of the microwave oven be designed.

Alternatively, the loading device is advantageously designed for semi-automatic or fully automatic loading of the microwave oven.

It is also conceivable that the loading device is designed for discontinuous loading.

According to another special one embodiment is the load carrier for, preferably fixing, accommodation of at least two membrane modules designed.

In particular, can be provided be that the Beschickungsgutträger for, preferably fixing, a maximum of twelve membrane modules is designed.

conveniently, is the load carrier designed to hold five membrane modules, preferably to fix them.

It can be provided that the minimum The distance between the membrane modules is 1 cm.

It is also conceivable that the load carrier for preferably fixing, holding the membrane modules in parallel side by side or one above the other arranged way is designed.

According to another special one embodiment can be provided that the Anschließeinrichtung a first connection block arranged in the microwave chamber for Connecting the or the membrane module / modules to the purge air supply device or purge air discharge device having.

According to another special one embodiment The invention can provide that the first connection block is stationary and the loading device is designed to move the membrane module (s) over a from the liquid connections over the first connection block with the purge air supply device or purge air discharge device to bring in fluid connection.

The connection block advantageously consists of Plastic, preferably PP, and it has a microwave shielding cap for each membrane module for shielding a part of the membrane module or modules, preferably the PUR block, before microwaves.

According to another special one embodiment The invention can provide that the connecting device a second connection block to connect another of the flushing fluid connections of the or each membrane module to the purge air supply device or purge air discharge device having.

The second connection block is advantageously designed to be pivotable into a first position, in which, when the microwave oven is loaded, has the membrane module (s) in fluid communication with the other of the liquid connections via the second connection block with the purging air discharge device or purging air supply device.

The second is advantageous terminal block designed to be semi or fully automatic in the first position swing.

According to another special one embodiment the invention can be provided that the second terminal block with the purge air discharge device is in fluid communication.

The second advantageously exists terminal block made of plastic, preferably PP, and it has a microwave shielding cap for each membrane module for shielding a part of the or the respective membrane module before microwaves.

It can also be provided that the microwave chamber a loading opening which, by means of a for lockable is.

In particular, it can be provided that the second connection block is pivotable into a second position in which the microwave chamber through the loading opening when open Door can be loaded is.

The second is advantageous terminal block designed to be semi or fully automatic in the second position to pan.

The microwave oven advantageously has one vapor connection on.

It can also be provided that the brothers neck an exhaust fan is connected downstream.

conveniently, protrudes the purge air discharge device with the first terminal block in the first position in the brothers neck into it. This will improve the drainage of moisture laden purge air reached.

conveniently, is for each membrane module a purge air pressure control device intended.

In particular, it can be provided that for each Membrane module a purge air pressure measuring device is provided.

conveniently, an alarm device is provided which, when a value is exceeded or not reached respective predeterminable upper and lower purge air pressure limit Alarm triggers.

It is also convenient a weighing device for weighing the membrane module (s) intended.

In particular, can be provided be that the Weighing device is designed to the membrane module (s) im on the load carrier to weigh ordered state.

A control device is advantageously used for Control the operation of the facility.

Furthermore, the system for discontinuous Be designed to dry.

Finally, the microwave oven be expandable in modular design.

The invention is surprising Understanding that through the use of a loading and a connecting device the times between drying using microwave energy are reduced , which means that more membrane modules are dried per unit of time can.

If more than one membrane module at the same time can be dried in a microwave oven, the number of dried membrane modules per unit of time considerably more increase.

Further features and advantages of the invention result from the claims and the description below, in which an exemplary embodiment is explained in detail with reference to the schematic drawings. The show 1 to 3 different stages of a method according to an embodiment of the invention.

How not from the 1 to 3 results, there is an attachment 100 According to an embodiment of the present invention from a unit, on the back of a command unit (not shown) is mounted and all supply connections (not shown) are connected from the rear.

The attachment 100 is operated from a command field (not shown) on a front panel (not shown) on which command, signal display and control panels are arranged. An emergency stop switch (not shown) and main switch (not shown) are also housed on the front panel.

How from the 1 to 3 results, the system points 100 a microwave oven, which is a microwave chamber 20 and a microwave generating device for generating microwaves in the microwave chamber 20 contains. The microwave generating device has a microwave coupling device 3 and a fashion stranger 3a (also referred to as a mode type converter).

The microwave chamber 20 has a loading opening 22 on the door designed as a contact-free sliding door 10 is lockable. For loading the microwave chamber 20 drives the door 10 behind a housing cover (not shown).

The microwave chamber 20 is in the upper area with a vapor nozzle 2 and a downstream exhaust fan 1 Mistake.

In the microwave chamber 20 there is a guide rail 12 , a fixed first connection block 24 and one by means of a swivel unit 5 swiveling second connection block 6 ,

The first connection block 24 stands with a purge air supply device 8th a purge air system in connection and the second connection block 6 stands with a purge air discharge device 4 in the form of a plastic tube in connection. In the purge air supply device 8th is a purge air pre-measuring device tung 9 intended.

The in the 1 to 3 shown plant 100 is used for the simultaneous drying of five membrane modules in the form of dialyzers 7 used. The dialyzers 7 consist of polysolphone hollow fibers and a polycarbonate housing. The attachment 100 Due to the modular design, it can be used with identical systems if required to increase the drying capacity.

Because the dialyzers 7 At their ends have PUR potting compounds that can be destroyed by microwave energy is both in the first connection block 24 as well as in the second connection block 6 for every dialyzer 7 each provided a microwave shielding cap (not shown) for shielding against microwave energy.

The dialyzers 7 can by hand or z. B. by means of a robot arm (not shown) on a load carrier 11 be inserted in such a way that they are arranged horizontally parallel next to each other and their rinsing liquid connections 26 and 28 (also called washroom connections) are at least almost completely closed.

The load carrier 11 can in turn manually or z. B. by means of a linear robot (not shown) on the guide rail 12 into the microwave chamber 20 be pushed or driven until the liquid connections 30 (also called a dialyzer connector) each of the five dialyzers 7 in the first connection block designed for receiving 24 stuck. This will make the fluid connections 30 in the first connection block 24 fixed and with the purge air supply device 8th connected. The to the liquid connections 30 belonging ends of the dialyzers 7 are surrounded by the microwave shielding caps (not shown).

The second connection block then swivels 6 from the in the 1 and 2 shown second position in the in 3 shown first position down. The second connection block is in this first position 6 on the liquid connections 32 (also called dialyzer connector) of the dialyzer 7 , This again serves, on the one hand, the dialyzers 7 to fix and on the other hand a connection with the purge air discharge device 4 manufacture. It also becomes the fluid connector 32 belonging ends of the dialyzers 7 protected from microwaves by means of the microwave shielding caps (not shown). If a linear robot for moving the load carrier in 11 has been used, it is now moved out again and the door closes 10 , Subsequently, the microwave energy via the microwave coupling device 3 and the fashion stirrer 3a into the microwave chamber 20 given. The required microwave energy is generated by a 6 kW / 2450 MHz microwave system (not shown). Using an R26 T-piece and the integrated fashion distiller 3a becomes an even distribution of microwave energy in the microwave chamber 20 realized.

Through active and conditioned flushing of the dialyzers 7 By means of the flushing system, the water vapor generated when the moist hollow fibers are heated is flushed out of the polycarbonate housing of the dialyzers with the aid of flushing air 7 pushed out. The free water vapor is via the purge air discharge device 4 into the microwave chamber 20 blown and by means of the exhaust fan 1 over the brothers' supports 2 from the microwave chamber 20 sucked.

• 1. Es lassen sich sowohl fehlende Dialysatoren erkennen als auch Dialysatoren, die sich in der Fixierung des zweiten Anschlußblockes verklemmen und somit nicht ausreichend mit Spülluft versorgt werden. Wird dieser Zustand nicht erkannt, kommt es zur Überhitzung im PUR-Block, die äußerlich nicht unbedingt erkannt werden kann, jedoch später zu Komplikationen/Unverträglichkeiten beim Patienten führen kann.
• 2. Beurteilung des Trocknens, da die Poren der Hohlfasern mit zunehmenden Trocknungsgrad immer durchlässiger werden.

The purge air for purging or aerating the dialyzers 7 is kept constant at 1 bar during drying via a purge air pre-pressure control device (not shown). The purge air pressure is measured at each dialyzer station using a purge air pressure measuring device 9 measured and monitored. An alarm is triggered if a predetermined upper or lower limit is exceeded or undershot. The purge air pre-pressure measurement allows the following conclusions:

• 1. Both missing dialyzers can be identified as well as dialyzers that jam in the fixation of the second connection block and are therefore not adequately supplied with purge air. If this condition is not recognized, the PUR block overheats, which cannot be recognized externally, but can later lead to complications / intolerance in the patient.
• 2. Assessment of drying, since the pores of the hollow fibers become more permeable as the degree of drying increases.

There is no active weight control in the microwave chamber during microwave drying 20 instead of. However, this can be achieved by means of a separate weighing device (not shown) on which a linear robot places the load carrier with the dialyzers before and after drying.

The door 10 the microwave chamber 20 is driven by a pneumatic cylinder (not shown) and a chain (not shown). Above the door 10 there is a light barrier (not shown) that detects the movement of the door 10 stops as soon as the light barrier, e.g. B. is interrupted by a robot arm. At the same time, an alarm is triggered, which the operating personnel must acknowledge on a control device of the respective microwave chamber after the cause has been remedied.

• 1. Grundpalette eines Beschickungsgutträgers
• 2. Verschiedene Auflagerbügel mit Codierungen
• 3. PTFE-Verschlußbuchsen zum Verschließen der Spülflüssigkeitsanschlüsse der Dialysatoren (Verschleißteil mit der Möglichkeit zum Wechseln).

Dialyzer variants differ in the diameter of the dialyzer body. To build a simple and variable logistics based on the different dialyzers, a concept with e.g. B. three assemblies are conceivable:

• 1. Basic range of a load carrier
• 2. Different support brackets with coding
• 3. PTFE sealing bushes for closing the flushing liquid connections of the dialyzer (wearing part with the possibility of changing).

The position of the microwave shield caps on the second connection block 6 are to be monitored on the pneumatic cylinders of the swivel device 5 Reed contacts attached, which report the reaching of the respective end positions. Since the various dialyzer types are different in length, the aforementioned mechanism can be designed so that the tolerances of the pivoting device 5 all different lengths can be fixed equally well without specific settings.

The in the description above as well as in the claims Features of the invention disclosed can be both individually and in any combination for the implementation of the invention in its various embodiments be essential.

1

exhaust fan

2

vapor connection

3

Mikrowelleneinkopplungseinrichtung

3a

Modestirrer

4

Spülluftabführeinrichtung

5

Pivot means

6

second terminal block

7

dialyzer

8th

Spülluftzuführeinrichttung

9

Spülluftvordruckmeßeinrichtung

10

door

11

Beschickungsgutträger

12

guide rail

20

microwave chamber

22

loading port

24

first terminal block

26

Spülflüssigkeitsanschluß

28

Spülflüssigkeitsanschluß

30

liquid port

32

liquid port

100

investment

Claims (64)

Process for drying membrane modules, in particular dialyzers, with at least two liquid connections using microwave energy, characterized in that at least one membrane module is placed in a microwave oven by means of a charging device, the liquid connections are connected to a purge air system by means of a connecting device, subsequently with simultaneous flow of purge air from the purge air system Microwave energy is set over a period of time, subsequently separated from the purge air system and taken out of the microwave oven. A method according to claim 1, characterized in that a semi or fully automatic loading device is used. A method according to claim 1, characterized in that a manually operated loading device is used. Method according to one of the preceding claims, characterized characterized that the Feeding is carried out discontinuously. Method according to one of the preceding claims, characterized characterized in that at least two Membrane modules in the microwave oven simultaneously or one after the other are given. Method according to one of the preceding claims, characterized characterized that a maximum of twelve membrane modules placed in the microwave oven simultaneously or in succession. Method according to one of the preceding claims, characterized characterized that five membrane modules placed in the microwave oven simultaneously or in succession. Method according to one of the preceding claims, characterized characterized that the or each membrane module fixed on or on a load carrier becomes. A method according to claim 8, characterized in that this or each membrane module has two liquid connections and fixed by means of this to or on a loading support becomes. Method according to one of the preceding claims, characterized characterized that the Membrane modules can be arranged in parallel next to or on top of each other. Method according to one of the preceding claims, characterized characterized that the Membrane modules can be arranged at a minimum distance of 1 cm. Method according to one of the preceding claims, characterized characterized that the or each membrane module with one of its rinsing liquid connections in one fixed first connection block the connecting device is inserted in the microwave chamber of the microwave oven. A method according to claim 12, characterized in that several membrane modules are placed in the microwave chamber simultaneously and each be inserted into the first connection block with one of their liquid connections. A method according to claim 12 or 13, characterized in the existence second connection block the connecting device swung down from a second into a first position and plugged onto the other of the liquid connections becomes. A method according to claim 14, characterized in that the second connection block is swiveled semi or fully automatically. Method according to one of claims 12 to 15, characterized in that that the first terminal block with a purge air supply device of the purge air system and the second terminal block with a purge air discharge device of the purge air system is in fluid communication. Method according to one of claims 14 to 16, characterized in that that the second connection block before removing the membrane module (s) into the second Position swung back becomes. Method according to one of claims 14 to 17, characterized in that that the Microwave chamber has a loading opening, which means a door lockable is, the loading opening by means of the door before exposing the membrane module (s) to microwave energy locked and the door is opened again before the removal step. Method according to one of the preceding claims, characterized characterized that the purge air is tempered. Method according to one of the preceding claims, characterized characterized that the purge air is conditioned. Method according to one of the preceding claims, characterized characterized that a Spülluftvordruckregelung for the or each diaphragm module is carried out. Method according to one of the preceding claims, characterized characterized that a Spülluftvordruckmessung for the or performed each membrane module becomes. A method according to claim 22, characterized in the existence Alarm is issued when the measured or a measured purge air pressure an upper or lower purge air pressure limit that can be specified below. Method according to one of the preceding claims, characterized characterized that the or each membrane module is weighed before and after drying. A method according to claim 24, characterized in that this or the membrane module (s) together with the load carrier of the Feeding device is / are weighed. Method according to one of the preceding claims, characterized characterized that the Time period over which exposed the membrane module (s) to the microwave energy will / will be a predetermined period of time. Method according to one of claims 1 to 25, characterized in that that the Length of time over which the membrane module (s) is / are exposed to microwave energy, depending on the moisture content is determined. Investment ( 100 ) for drying membrane modules, especially dialyzers ( 7 ), with at least two liquid connections ( 30 . 32 ) by means of microwave energy, with at least one microwave oven, which has a microwave chamber ( 20 ) and a microwave generating device for generating microwaves in the microwave chamber ( 20 ) contains, and a purge air system with a purge air supply device ( 8th ) and a purge air discharge device ( 4 ), characterized in that a charging device for charging the microwave oven with at least one membrane module and a connecting device for connecting the liquid connections ( 30 . 32 ) of the or each membrane module is provided on the flushing system. Investment ( 100 ) according to claim 28, characterized in that the loading device comprises a pushable or mobile loading goods carrier ( 11 ) having. Investment ( 100 ) according to claim 28 or 29, characterized in that in the microwave chamber ( 20 ) a guide rail ( 12 ) is provided along which the load carrier ( 11 ) is pushable or mobile. Investment ( 100 ) according to claim 30, characterized in that the guide rail ( 12 ) to fix the load carrier ( 11 ) is designed in an end position. Investment ( 100 ) according to one of claims 29 to 31, characterized in that the mobile load carrier ( 11 ) is self-propelled. Investment ( 100 ) according to one of claims 29 to 31, characterized in that a linear robo ter for moving the load carrier ( 11 ) is provided. Investment ( 100 ) according to one of claims 28 to 33, characterized in that a manipulator arm or robot for loading the load carrier ( 11 ) is provided with the membrane module (s). Investment ( 100 ) according to one of claims 28 to 33, characterized in that the loading device is designed for manual loading of the microwave oven. Investment ( 100 ) according to one of claims 28 to 34, characterized in that the loading device is designed for semi-automatic or fully automatic loading of the microwave oven. Investment ( 100 ) according to one of claims 28 to 36, characterized in that the loading device is designed for discontinuous loading. Investment ( 100 ) according to one of claims 29 to 37, characterized in that the load carrier ( 11 ) is designed for, preferably fixing, accommodation of at least two membrane modules. Investment ( 100 ) according to one of claims 29 to 38, characterized in that the load carrier ( 11 ) is designed to accommodate a maximum of twelve membrane modules. Investment ( 100 ) according to one of claims 29 to 39, characterized in that the load carrier ( 11 ) is designed for, preferably fixing, holding five membrane modules. Investment ( 100 ) according to one of claims 28 to 40, characterized in that the minimum distance between the membrane modules corresponds to 1 cm. Investment ( 100 ) according to one of claims 29 to 41, characterized in that the load carrier ( 11 ) for, preferably fixing, receiving the membrane modules is designed in a manner arranged in parallel next to or above one another. Investment ( 100 ) according to one of claims 28 to 42, characterized in that the connecting device has a in the microwave chamber ( 20 ) arranged first connection block ( 24 ) for connecting the membrane module (s) to the purge air supply device ( 8th ) or purge air discharge device ( 4 ) having. Investment ( 100 ) according to claim 43, characterized in that the first connection block ( 24 ) fixed and the loading device is designed to move the membrane module (s) via one of the liquid connections ( 30 respectively. 32 ) via the first connection block ( 24 ) with the purge air supply device ( 8th ) or purge air discharge device ( 4 ) to bring in fluid connection. Investment ( 100 ) according to claim 43 or 44, characterized in that the first connection block ( 24 ) made of plastic, preferably PP, and for each membrane module has a microwave shielding cap for shielding a part of the or the respective membrane module from microwaves. Investment ( 100 ) according to one of claims 43 to 45, characterized in that the connecting device comprises a second connection block ( 6 ) to connect another one of the liquid connections ( 30 respectively. 32 ) of the or each membrane module to the purge air discharge device ( 4 ) or purge air supply device ( 8th ) having. Investment ( 100 ) according to claim 46, characterized in that the second connection block ( 6 ) is designed to be pivotable into a first position in which, when the microwave oven is loaded, the membrane module (s) with the other of the liquid connections ( 30 respectively. 32 ) via the second connection block ( 6 ) with the purge air discharge device ( 4 ) or purge air supply device ( 8th ) is in fluid communication. Investment ( 100 ) according to claim 46 or 47, characterized in that the second connection block ( 6 ) is designed to pivot semi or fully automatically into the first position. Investment ( 100 ) according to one of claims 46 to 48, characterized in that the second connection block ( 6 ) with the purge air discharge device ( 4 ) is in fluid communication. Investment ( 100 ) according to one of claims 46 to 49, characterized in that the second connection block ( 6 ) made of plastic, preferably PP, and for each membrane module has a microwave shielding cap for shielding part of the or the respective membrane module from microwaves. Investment ( 100 ) according to one of claims 28 to 50, characterized in that the microwave chamber ( 20 ) a loading opening ( 22 ) which, by means of a door ( 10 ) is lockable. Investment ( 100 ) according to claim 51, characterized in that the second connection block ( 6 ) can be pivoted into a second position, in which the micro wave chamber ( 20 ) through the loading opening ( 22 ) with the door open ( 10 ) can be loaded. Investment ( 100 ) according to claim 52, characterized in that the second connection block ( 6 ) is designed to pivot semi or fully automatically into the second position. Investment ( 100 ) according to one of claims 28 to 53, characterized in that the microwave oven has a vapor nozzle ( 2 ) having. Investment ( 100 ) according to claim 54, characterized in that the vapor nozzle ( 2 ) an exhaust fan ( 1 ) is connected downstream. Investment ( 100 ) according to claim 54 or 55, characterized in that the purge air discharge device ( 4 ) with the first connection block in the vapor connector in the first position ( 2 ) protrudes. Investment ( 100 ) according to one of claims 28 to 56, characterized in that a purge air pressure control device is provided for each membrane module. Investment ( 100 ) according to one of claims 28 to 57, characterized in that for each membrane module a purge air pre-measuring device ( 9 ) is provided. Investment ( 100 ) according to claim 58, characterized in that an alarm device is provided which triggers an alarm when a predeterminable upper and lower purge air pressure limit value is exceeded or undershot. Investment ( 100 ) according to one of the preceding claims, characterized in that a weighing device is provided for weighing the membrane module (s). Investment ( 100 ) according to claim 60, characterized in that the weighing device is designed to the membrane module (s) in on the load carrier ( 11 ) arranged to weigh. Investment ( 100 ) according to one of claims 28 to 61, characterized in that a control device for controlling the operation of the system ( 100 ) is provided. Investment ( 100 ) according to one of the preceding claims 28 to 62, characterized in that it is designed for discontinuous drying. Investment ( 100 ) according to one of the preceding claims 28 to 63, characterized in that the microwave oven is expandable in modular construction.