EP3959361A1 - Temperaturbehandlungsstufe und behandlungsanlage zum behandeln von bauteilen - Google Patents

Temperaturbehandlungsstufe und behandlungsanlage zum behandeln von bauteilen

Info

Publication number
EP3959361A1
EP3959361A1 EP20721141.8A EP20721141A EP3959361A1 EP 3959361 A1 EP3959361 A1 EP 3959361A1 EP 20721141 A EP20721141 A EP 20721141A EP 3959361 A1 EP3959361 A1 EP 3959361A1
Authority
EP
European Patent Office
Prior art keywords
treatment
temperature
stage
fluid
treatment fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20721141.8A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jan BEER
Jürgen Weschke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP3959361A1 publication Critical patent/EP3959361A1/de
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00Electrophoretic coating characterised by the process
    • C25D13/22Servicing or operating apparatus or multistep processes
    • C25D13/24Regeneration of process liquids

Definitions

  • the invention relates to a temperature treatment stage for treating a fluid and a treatment system for treating components, in particular for use in a painting system for painting workpieces, in particular vehicle bodies, and a method for treating a treatment fluid in a treatment system.
  • VBH pretreatment
  • KTL cathode dip painting
  • the state of the art in the VBH is that either disinfection processes such as UV radiation, catalytic processes, electro-pulse processes and ultrasound treatment, also in combination with UV radiation, are used in the last rinsing baths or that chemical disinfection with, for example, hydrogen peroxide, Chlorine dioxide or peracetic acid takes place from baths and connected units.
  • disinfection processes such as UV radiation, catalytic processes, electro-pulse processes and ultrasound treatment, also in combination with UV radiation, are used in the last rinsing baths or that chemical disinfection with, for example, hydrogen peroxide, Chlorine dioxide or peracetic acid takes place from baths and connected units.
  • the aim of the disinfection process at these points is to prevent nobody from being carried into the KTL basin, where they can cause greater damage with correspondingly high costs.
  • Nano-coating baths, ultrasonic and electro-pulse processes are used. Chemical disinfection with the chemicals described above is not possible because they are not compatible with the coating chemicals. A biocide can only be used if it is compatible with the bath chemistry.
  • One object of the invention is to create a temperature treatment stage of a treatment plant which allows a simple and inexpensive treatment of a fluid in the treatment plant.
  • Another object is to provide a treatment plant with such a temperature treatment stage.
  • Another object is to provide a method for treating a treatment fluid in such a treatment plant.
  • a temperature treatment stage for treating a fluid in particular for thermally treating a treatment fluid of a treatment device for treating components, comprising a cooling stage and a heating stage fluidically coupled therewith.
  • a coupling device is provided on the treatment device and / or on at least one storage container. The fluid can be fed to the heating stage via a supply line. The heated fluid can be fed to the cooling stage via a return.
  • the proposed temperature treatment stage offers an advantageous solution for biocide-free disinfection or germ reduction of treatment devices, for example spray systems or immersion baths, in particular nano-coating baths in a VBH system and / or a KTL system. Further advantageous applications are possible in the area of general pretreatment of metallic parts such as screws, sheet metal, molded parts, components, etc., as well as in the area of electroplating, powder coating, anodizing systems, aluminum, plastic and automotive painting systems, where metal and Plastic parts are pretreated and then coated.
  • the treatment fluid can be used in an immersion bath or sprayed on in a spray system.
  • the temperature treatment stage makes it possible to use a method that is preferably used in food technology for sterilizing liquids, milk, juices and beer before filling, namely pasteurization or short-term heating (KZE).
  • KZE short-term heating
  • the pasteurization units (PU), which have to be determined for each medium, here the treatment fluid, are a measure of the pasteurization.
  • the flow of the fluid, in particular the treatment fluid is heated to the pasteurization temperature via a heating stage with a heating medium, for example hot water or steam. Preheating can take place via the return in an optional recuperation heat exchanger.
  • a pipe coil can optionally follow in which the medium is kept at temperature for a defined time.
  • the treatment fluid can flow through the optional recuperation heat exchanger for cooling and at the same time heat the flow before it is cooled back to the starting temperature in the cooling stage with the aid of a cooling medium, for example cold water.
  • the coupling device for coupling the temperature treatment stage to the treatment device and / or a storage container can for example be a suitable connection, a valve, a pipeline or the like.
  • the pasteurizer units PE a measure for the killing of germs, can e.g. calculate for beer as follows:
  • PE t_ver * 1, 393T- 6 ° )
  • t_ver is the residence time in minutes and T is the temperature in ° C.
  • PE t_ver * 1, 2589T- 6 ° )
  • T and t_ver are therefore product-specific parameters.
  • a temperature of 60 ° C or 80 ° C and a dwell time of one minute corresponds to 1 PU and means a germ reduction by 2 powers of ten.
  • the equation for PE can be determined by determining the bacterial count at constant temperature over time at two different temperatures. While in the food industry the product medium flows from product manufacture to product filling only in one direction and complete disinfection is to be achieved, in the treatment system the short-term heating serves as a germ sink for the connected treatment facilities in order to reduce the germ count to the lowest possible level. In an exemplary VBH / KTL system, the treatment fluid usually circulates in a closed circuit.
  • the heating stage can be followed by a temperature holding section in the form of a thermally insulated pipeline, the volume and / or length and / or flow of which can be dimensioned such that the heated fluid has a predetermined dwell time in the temperature holding section.
  • a sensor can advantageously be used to qualify and / or quantify the germ count.
  • a suitable temperature change can be carried out and / or a dwell time in the temperature treatment stage can be extended as a parameter for the reaction to a germ count outside a desired or permitted range of germ count.
  • the temperature can be increased in order to reduce the number of germs.
  • the residence time in the temperature treatment stage, in particular in the temperature holding section can be increased, in particular at an elevated temperature.
  • the process is completely chemical-free.
  • the pasteurization temperature and / or residence time depends on the medium being treated and can easily be tried out in preliminary tests.
  • the temperature treatment stage can work without moving parts and is therefore particularly low-maintenance.
  • One advantage of the proposed temperature treatment stage is a significant reduction in germs in a treatment system, for example a VBH and / or a KTL system.
  • the temperature treatment stage can be conveniently integrated into a treatment system as a germ sink.
  • the short-term heating can be fully automated and deliver a reproducible disinfection result.
  • the temperature treatment stage can work with low energy through the use of heat exchangers. This results in a simple system structure.
  • the short-term heating can advantageously be carried out in a way that is gentle on the product.
  • a recuperation heat exchanger can be fluidically coupled between the cooling stage and the heating stage, wherein in the recuperation heat exchanger the fluid in the flow can be heated by the fluid in the return.
  • One advantage of short-term heating is the concept of optional heat recovery.
  • the fluid in the heating stage and in the cooling stage only needs to be heated or cooled by 0.5 - 1.5 ° K, which enables energy-saving operation .
  • the heating stage can be followed by a temperature holding section, the volume and / or length and / or flow rate of which is dimensioned so that the heated fluid has a predetermined dwell time in the temperature holding section.
  • the temperature of the fluid together with the dwell time in this temperature range define the pasteurizer unit PE, which specifies a degree of germ reduction specifically for the fluid.
  • the predetermined dwell time can be set favorably in such a way that the desired germ reduction is reliably achieved.
  • the temperature holding section can have a pipeline.
  • the temperature holding section can be designed in the form of a pipe, in particular a coiled pipe in the form of one or more pipe coils. Suitable insulation of the temperature holding section can expediently be provided.
  • a regulating and / or control device can be provided so that the temperature and / or flow rate of a cooling medium in the cooling stage can be set as a function of an outlet temperature of the fluid from the cooling stage.
  • the output temperature of the fluid from the cooling stage can thus be achieved in the most energy-efficient way possible for the specific application in order to be able to carry out the subsequent process with the fluid with the desired quality.
  • a regulating and / or control device can advantageously be provided so that the temperature and / or flow rate of a meat medium in the meat stage can be set as a function of an outlet temperature of the fluid from the meat stage.
  • the starting temperature of the fluid from the meat stage can thus be achieved as energy-optimally as possible for the specific application, in order to achieve the desired reduction in the number of germs in the fluid for a given residence time in this temperature range.
  • a regulating and / or control device can also advantageously be provided so that the temperature and / or flow rate of the fluid can be set in the flow depending on a flow temperature and / or in the return depending on a return temperature.
  • the temperature and / or the flow rate of the fluid can be selected in such a way that the desired reduction in the number of germs in the fluid is achieved with a predetermined residence time in this temperature range, with a favorable use of energy.
  • a sensor can advantageously be used for qualifying and / or quantifying the germ count.
  • a suitable temperature change can advantageously be carried out and / or a residence time in the temperature treatment stage can be extended as a parameter for the reaction to a germ count outside a desired or permitted range of germ count.
  • the temperature can be increased in order to reduce the number of germs.
  • the residence time in the temperature treatment stage can be increased, in particular at an increased temperature.
  • a storage container can be provided to hold thermally treated fluid.
  • a favorable process implementation can be achieved with the aid of the fluid with a favorable use of energy for the desired reduction in the number of germs in the fluid for a given residence time in a given temperature range.
  • At least one sensor can be provided for qualifying and / or quantifying a germ count in the treatment fluid. This allows precise process control in the treatment of the treatment fluid.
  • the temperature treatment stage can advantageously be designed as an independent module which can be connected to different tanks of one or more treatment systems.
  • the temperature treatment stage can be designed to be mobile, for example.
  • a treatment system in which a component to be treated can be treated with a treatment fluid in a treatment device, in particular a pretreatment system or dip painting system, a temperature treatment stage being provided in which the treatment fluid can be treated.
  • the temperature treatment stage comprises a cooling stage and a heating stage fluidically coupled therewith.
  • the temperature treatment stage has a coupling device with which the temperature treatment stage can be coupled to the treatment device and / or at least one storage container which at least temporarily contains treatment fluid, at least the heating stage being coupled at least temporarily to the treatment device and the treatment fluid from the treatment device via a
  • the flow can be fed directly or indirectly to the heating stage and the heated treatment fluid can be fed to the cooling stage via a return.
  • the coupling device can have a detachable line, a valve, a pump or the like, with which the temperature treatment stage can be temporarily connected to the treatment device and easily disconnected again.
  • the proposed treatment system with a temperature treatment stage offers an advantageous solution for biocide-free disinfection or germ reduction of the nano-coating baths in a VBH system and a KTL system.
  • the flow of the treatment fluid is heated to the pasteurization temperature via a heating stage with a heating medium, for example hot water or steam. Preheating can take place via the return in an optional recuperation heat exchanger.
  • a heating medium for example hot water or steam.
  • the temperature treatment stage can advantageously be integrated into the treatment system as a germ sink.
  • the short-term heating can be fully automated and deliver a reproducible disinfection result.
  • the treatment system with a can work with low energy through the use of heat exchangers. This results in a simple system structure.
  • the short-term heating can advantageously be carried out in a way that is gentle on the product.
  • Advantageous applications are possible in the area of general pretreatment of metallic parts such as screws, sheet metal, molded parts, components, etc., as well as in the area of electroplating, powder coating, anodizing systems, aluminum, plastic and automotive painting systems, where metal and plastic parts pretreated and then coated.
  • the treatment fluid can be used in an immersion bath or sprayed on in a spray system.
  • a recuperation heat exchanger can be fluidically coupled between the cooling stage and the heating stage, the treatment fluid in the recuperation heat exchanger being heatable in the flow from the treatment fluid in the return.
  • the concept of optional heat recovery is an advantage of short-term heating for KTL and nano-coating baths.
  • the treatment fluid only needs to be heated or cooled by 0.5 - 1.5 ° K in the heating stage and in the cooling stage.
  • a closed circuit can be formed in which the treatment fluid is conducted from the treatment system to the temperature treatment stage and back to the treatment system. While in the food industry the product medium flows from product manufacture to product filling only in one direction and complete disinfection is to be achieved, in the VBH / KTL short-term heating serves as a germ sink for the connected baths in order to keep the germ count as low as possible .
  • the treatment fluid usually circulates in a closed circuit.
  • the treatment fluid can be conducted from the treatment device to the temperature treatment stage and then into a storage container, and / or the treatment fluid can be conducted from the treatment device into a storage container and then to the temperature treatment stage.
  • the storage container can serve to equalize the fluid flow of the treatment fluid.
  • the treatment system can comprise a plurality of treatment devices, a switching device being provided in order to switch the temperature treatment stage between different treatment devices.
  • a temperature treatment stage can be used for brief heating of the treatment fluid for several treatment devices.
  • the treatment fluid for a treatment device can be temporarily stored in a storage container, while the temperature treatment stage heats the treatment fluid of another treatment device.
  • the treatment device can be designed as a dip basin, in particular as a pretreatment basin or as a dip lacquer basin.
  • the treatment system can be used for advantageous applications in the area of general pretreatment of metallic parts such as screws, sheet metal, molded parts, components, etc., as well as in the area of electroplating, powder coating, anodizing systems, aluminum, plastic and automotive painting systems, where metal and plastic parts are pretreated and then coated. Further advantageous application possibilities can be found in the area of dip painting and the connected anolyte system.
  • a method for the thermal treatment of a treatment fluid of a treatment plant with a temperature treatment stage is proposed. According to the invention, the treatment fluid is heated in a heating stage and cooled in a cooling stage.
  • the temperature treatment stage makes it possible to use a method that is preferably used in food technology to sterilize liquids, milk, juices and beer before filling, namely pasteurization or short-term heating (KZE).
  • KZE short-term heating
  • the treatment fluid can be kept at a target temperature for a defined dwell time in a temperature holding section downstream of the heating stage.
  • the pasteurization units (PU) which must be determined for each treatment fluid, are a measure of pasteurization.
  • the desired pasteurizer units can be selected via the dwell time and the target temperature.
  • a predetermined germ reduction in the treatment fluid can thus advantageously be achieved, for example.
  • the relationship between residence time and target temperature must be determined experimentally for each treatment fluid.
  • the treatment fluid can be preheated upstream of the heating stage in a recuperation heat exchanger by heated treatment fluid.
  • the treatment fluid only needs to be heated or cooled by 0.5 - 1.5 ° K in the heating stage and in the cooling stage.
  • the temperature and / or flow rate of a cooling medium in the cooling stage can be set as a function of an outlet temperature of the treatment fluid from the cooling stage. The starting temperature of the treatment fluid from the cooling stage can thus be achieved as energy-optimally as possible for the specific application in order to be able to carry out the subsequent process with the treatment fluid with the desired quality.
  • the temperature and / or flow rate of a heating medium in the heating stage can advantageously be set as a function of an outlet temperature of the treatment fluid from the heating stage.
  • the starting temperature of the treatment fluid from the heating stage can thus be achieved in the most energy-efficient way possible for the specific application in order to achieve the desired reduction in the number of germs in the treatment fluid for a predetermined residence time in this temperature range.
  • the temperature and / or flow rate of the treatment fluid can be set in the flow depending on a flow temperature and / or in the return depending on a return temperature.
  • the temperature and / or the flow rate of the treatment fluid can be selected so that the desired reduction in the number of germs in the treatment fluid is achieved with a predetermined residence time in this temperature range, with a favorable use of energy.
  • the temperature and / or the flow rate and / or the residence time of the treatment fluid in the temperature treatment stage, in particular in the temperature holding section can be set as a function of a germ count. This allows a reliable process control in the treatment of the treatment fluid.
  • Fig. 1 is a schematic representation of a
  • Temperature treatment stage in which a treatment fluid of a treatment device for treating components can be thermally treated
  • FIG. 2 shows a schematic representation of a treatment plant according to an exemplary embodiment of the invention, in which a component to be treated can be treated in a treatment device with a treatment fluid and which includes a temperature treatment stage according to FIG. 1;
  • FIG. 3 shows a schematic representation of a treatment plant according to a further exemplary embodiment of the invention with a storage container in front of the treatment device;
  • FIG. 4 shows a flow diagram of a method according to a
  • Embodiment of the invention for the thermal treatment of a treatment fluid of a treatment plant with a temperature treatment stage.
  • FIG. 1 shows a schematic illustration of a temperature treatment stage 100 according to an exemplary embodiment of the invention, in which a fluid, for example a treatment fluid 512 of a treatment device 510, not shown, for treating components 10 can be thermally treated.
  • a fluid for example a treatment fluid 512 of a treatment device 510, not shown, for treating components 10 can be thermally treated.
  • the temperature treatment stage 100 shown advantageously enables, for example, biocide-free disinfection or germ reduction of nano-coating baths in a VBFI system and / or a KTL system.
  • the treatment fluid 512 can be kept at a setpoint temperature T_soll for a defined time t_ver downstream of a meat stage 300 in a temperature holding section 310.
  • the pasteurization units (PU) which must be determined for each treatment fluid 512, are a measure of the pasteurization.
  • the desired pasteurizer units can be selected via the dwell time t_ver and the target temperature T_soll. A predetermined germ reduction in the treatment fluid 512 can thus advantageously be achieved.
  • the relationship between dwell time t_ver and setpoint temperature T_soll can be determined experimentally for each treatment fluid 512.
  • the temperature treatment stage 100 comprises a cooling stage 200 and the meat stage 300 fluidically coupled therewith.
  • a recuperation heat exchanger 400 is fluidically coupled between the cooling stage 200 and the meat stage 300.
  • the treatment fluid 512 is supplied to the meat stage 300 via a feed line 110 by means of a pump 118 Line section 112 is passed into the recuperation heat exchanger 400.
  • the treatment fluid 512 in the flow 110 is heated by the treatment fluid 512 in the return 120.
  • the temperature treatment stage 100 has a coupling device 150, for example a valve, a pipe or the like, via which the flow 110 to a treatment device (not shown) in which the treatment fluid 512 is used or a storage container (not shown) in which the treatment fluid 512 is temporarily stored, can be coupled.
  • a coupling device 150 for example a valve, a pipe or the like, via which the flow 110 to a treatment device (not shown) in which the treatment fluid 512 is used or a storage container (not shown) in which the treatment fluid 512 is temporarily stored, can be coupled.
  • the treatment fluid 512 reaches the heating stage 300 via the line section 114 from the recuperation heat exchanger 400.
  • the treatment fluid 512 is heated.
  • the heating power is fed to the heating stage 300 via a heating medium 304, for example hot water or steam, which is passed into the heating stage 300 via a line 302.
  • the heating medium 304 is discharged again from the heating stage 300 via the line 302.
  • the heating stage 300 is followed by the temperature holding section 310, the volume and / or length and / or flow rate of which is dimensioned such that the heated treatment fluid 512 has a predetermined dwell time t_ver in the temperature holding section 310.
  • the treatment fluid 512 reaches the temperature holding section 310, which is designed in the form of a pipeline 128, via the line section 116.
  • the heated treatment fluid 512 is fed via the line section 122 into the recuperation heat exchanger 400, where it is used to preheat the treatment fluid 512 in the supply 110.
  • the treatment fluid 512 is fed from the recuperation heat exchanger 400 to the cooling stage 200 via the line section 124.
  • the temperature treatment stage 100 has a coupling device 160, for example a valve, a pipe or the like, via which the return 120 to a treatment device (not shown) in which the treatment fluid 512 is used or a storage container (not shown) in which the treatment fluid 512 is temporarily stored, can be coupled.
  • the cooling power is supplied to the cooling stage 200 via a cooling medium 204, for example cold water, which flows into the cooling stage 200 via the line 202 and is also discharged again after it has flowed through.
  • the cooled treatment fluid 512 is discharged from the cooling stage 126 via the line section 126.
  • a regulating and / or control device can advantageously be provided with which the temperature and / or the flow rate of the cooling medium 204 in the cooling stage 200 can be adjusted depending on the outlet temperature of the treatment fluid 512 from the cooling stage 200 .
  • a regulating and / or control device can be provided with which the temperature and / or the flow rate of the heating medium 304 in the heating stage 300 can be adjusted depending on an outlet temperature of the treatment fluid 512 from the heating stage 300.
  • a regulating and / or control device (not shown) can be provided with which the temperature and / or the flow rate of the treatment fluid 512 in the flow 110 can be adjusted depending on a flow temperature and / or in the return 120 depending on a return temperature.
  • FIG. 2 shows a schematic representation of a treatment system 500 according to an exemplary embodiment of the invention, in which a component 10 to be treated can be treated in a treatment device 510 with a treatment fluid 512.
  • the treatment system 500 comprises a temperature treatment stage according to FIG. 1, the treatment fluid 512 being fed from the treatment device 510 into the temperature treatment stage 100 and returned from the temperature treatment stage 100 to the treatment stage 510.
  • the illustrated temperature treatment stage 100 advantageously enables, for example, a biocide-free disinfection or germ reduction of nano-coating baths in a VBH system and / or a KTL system.
  • the treatment system 500 can in particular be a pretreatment system or dip painting system for the component.
  • Advantageous applications are possible in the field of general Pretreatment of metallic parts such as screws, sheets,
  • Molded parts, components, etc. as well as in the field of electroplating, powder coating, anodizing systems, aluminum, plastic and automotive painting systems, where metal and plastic parts are pretreated and then coated. Further advantageous application possibilities can be found in the area of dip painting, for example vehicle bodies, and the connected anolyte system.
  • the temperature treatment stage 100 is provided, in which the treatment fluid 512 can be treated.
  • Temperature treatment stage 100 comprises a cooling stage 200 and a meat stage 300 fluidically coupled therewith.
  • the meat stage 300 is coupled at least temporarily to the treatment device 510.
  • Treatment fluid 512 from the treatment device 510 can be fed to the meat stage 300 via a supply line 110 and the heated treatment fluid 512 can be fed to the cooling stage 200 via a return 120.
  • Recuperation heat exchanger 400 fluidically coupled, the treatment fluid 512 in the flow 110 being heatable in the recuperation heat exchanger 400 from the treatment fluid 512 in the return 120.
  • a closed circuit is formed in the treatment system 500, in which the treatment fluid 512 is conducted from the treatment device 510 to the temperature treatment stage 100 and back to the treatment device 510.
  • the treatment device 510 is designed as a dip basin, in particular as a pretreatment basin or as a dip lacquer basin, in which the component 10 can be treated.
  • the temperature treatment stage 100 has a coupling device 150, for example a valve, a pipe or the like, via which the flow 110 is coupled to the treatment device 510 in which the treatment fluid 512 is used.
  • a coupling device 150 for example a valve, a pipe or the like, via which the flow 110 is coupled to the treatment device 510 in which the treatment fluid 512 is used.
  • the temperature treatment stage 100 has a coupling device 160, for example a valve, a pipeline or the like which the return line 120 is coupled to the treatment device 510 in which the treatment fluid 512 is used.
  • a coupling device 160 for example a valve, a pipeline or the like which the return line 120 is coupled to the treatment device 510 in which the treatment fluid 512 is used.
  • treatment fluid 512 of a plurality of treatment devices 510 with the same temperature treatment stage 100 can thus be heated at least temporarily.
  • FIG. 3 shows a schematic representation of a treatment system 500 according to a further exemplary embodiment of the invention with a storage container 520 in front of the treatment device 510.
  • a storage container 520 is provided in the circuit of the treatment fluid 512 in order to receive thermally treated treatment fluid 512.
  • the treatment fluid 512 is guided from the treatment device 510 to the temperature treatment stage 100 and then into the storage container 520, where it can be temporarily stored and then fed to the treatment device 510 as required.
  • the temperature treatment stage 100 has a coupling device 150, for example a valve, a pipe or the like, via which the flow 110 is coupled to the treatment device 510 in which the treatment fluid 512 is used.
  • a coupling device 150 for example a valve, a pipe or the like, via which the flow 110 is coupled to the treatment device 510 in which the treatment fluid 512 is used.
  • the temperature treatment stage 100 has a coupling device 160, for example a valve, a pipeline or the like, via which the return 120 is coupled to the storage container 520 in which the treatment fluid 512 is temporarily stored.
  • a coupling device 160 for example a valve, a pipeline or the like, via which the return 120 is coupled to the storage container 520 in which the treatment fluid 512 is temporarily stored.
  • FIG. 4 shows a flow chart of a method according to an exemplary embodiment of the invention for the thermal treatment of a treatment fluid of a treatment plant with a temperature treatment stage.
  • the method is characterized in that the treatment fluid of the treatment system is heated in a heating stage and cooled in a cooling stage.
  • the process enables, for example, a biocide-free disinfection or germ reduction of nano-coating baths in a VBH system and / or a KTL system.
  • treatment fluid which has already been used in a treatment device, for example, is preheated upstream of the heating stage in a recuperation heat exchanger by treatment fluid that has already been heated.
  • the treatment fluid is then fed to the heating stage in step S102 and is heated there to a target temperature T_soll.
  • the treatment fluid 512 is then held in step S104 downstream of the heating stage 300 in a temperature holding section 310 for a defined time t_ver at a setpoint temperature T_soll in order to bring about the desired germ reduction process.
  • a sensor can advantageously be used for qualifying and / or quantifying the germ count.
  • a suitable temperature change can advantageously be carried out and / or a residence time in the temperature treatment stage can be extended as a parameter for the reaction to a germ count outside a desired or permitted range of germ count.
  • the temperature can be increased in order to reduce the number of germs.
  • the residence time in the temperature treatment stage can be increased, in particular at an increased temperature.
  • the heated treatment fluid then passes through the recuperation heat exchanger again in step S106 and preheats new treatment fluid.
  • the heated treatment fluid itself is cooled down again somewhat.
  • the treatment fluid is cooled to the desired process temperature in the cooling stage and can be fed back to the treatment device or a storage container.
  • the temperature and / or flow rate of the cooling medium in the cooling stage can be dependent on an initial temperature of the treatment fluid can be adjusted from the cooling stage. Furthermore, the temperature and / or flow rate of the heating medium 304 in the heating stage 300 can be set as a function of an outlet temperature of the treatment fluid 512 from the heating stage 300.
  • the temperature and / or flow rate of the treatment fluid 512 in the flow 110 can be set depending on a flow temperature and / or in the return 120 depending on a return temperature.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating Apparatus (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
EP20721141.8A 2019-04-24 2020-04-15 Temperaturbehandlungsstufe und behandlungsanlage zum behandeln von bauteilen Pending EP3959361A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019110636.2A DE102019110636A1 (de) 2019-04-24 2019-04-24 Temperaturbehandlungsstufe und Behandlungsanlage zum Behandeln von Bauteilen
PCT/DE2020/100306 WO2020216410A1 (de) 2019-04-24 2020-04-15 Temperaturbehandlungsstufe und behandlungsanlage zum behandeln von bauteilen

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EP3959361A1 true EP3959361A1 (de) 2022-03-02

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Country Status (4)

Country Link
EP (1) EP3959361A1 (zh)
CN (1) CN113728128A (zh)
DE (2) DE102019110636A1 (zh)
WO (1) WO2020216410A1 (zh)

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DE3016728C2 (de) * 1980-04-30 1982-11-18 Babcock-Hitachi K.K., Tokyo Verfahren für die Elekrodialyse-Entsalzung
US20050279639A1 (en) * 2004-06-17 2005-12-22 Shrewsburg Timothy J Coating process and apparatus with improved resistance to bacteria
DE102011051879B4 (de) * 2011-07-15 2023-11-09 Dürr Systems Ag Anlage und Verfahren zur Oberflächenbehandlung von Werkstücken sowie Verwendung einer solchen Anlage zum Lackieren von Werkstücken

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