EP3745066A2 - Installation de traitement et procédé de traitement de pièces - Google Patents

Installation de traitement et procédé de traitement de pièces Download PDF

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Publication number
EP3745066A2
EP3745066A2 EP20182366.3A EP20182366A EP3745066A2 EP 3745066 A2 EP3745066 A2 EP 3745066A2 EP 20182366 A EP20182366 A EP 20182366A EP 3745066 A2 EP3745066 A2 EP 3745066A2
Authority
EP
European Patent Office
Prior art keywords
gas
heating
heat transfer
treatment room
treatment
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
EP20182366.3A
Other languages
German (de)
English (en)
Other versions
EP3745066A3 (fr
Inventor
Oliver Iglauer
Kevin Woll
Dietmar Wieland
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 EP3745066A2 publication Critical patent/EP3745066A2/fr
Publication of EP3745066A3 publication Critical patent/EP3745066A3/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
    • B05D3/0413—Heating with air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
    • F24H3/087—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/003—Supply-air or gas filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • the present invention relates to a treatment system and a method for treating workpieces.
  • a treatment system is used to dry coated vehicle bodies.
  • the method for treating workpieces is thus in particular a method for drying coated vehicle bodies.
  • Treatment systems and treatment processes are in particular from the EP 1 998 129 B1 , the US 2006/0068094 A1 , the EP 1 302 737 A2 and the WO 02/073109 A1 known.
  • the present invention is based on the object of providing a treatment system which has a simple structure and enables energy-efficient workpiece treatment.
  • the treatment system according to the invention comprises a heating system with a heating gas duct which is coupled to the circulating air modules, the gas to be supplied to the treatment room sections can be heated simply and efficiently.
  • the treatment system can thereby preferably be operated in a particularly energy-efficient manner.
  • the heating gas duct is preferably closed in itself, for example, designed to be closed in a ring, so that at least a partial gas flow of a heating gas flow guided in the heating gas duct flows through the heating gas duct several times.
  • the heating gas is preferably raw gas and / or clean gas which is suitable and / or intended for use in the treatment room, that is to say for flowing through the treatment room.
  • the heating gas preferably has a temperature that is higher than that of the gas flow in the circulating air modules and / or treatment room sections, at least immediately upstream of the treatment room sections.
  • the heating gas is preferably not an exhaust gas from a heating device of the heating system, in particular not a combustion exhaust gas.
  • a "self-contained heating gas duct” is to be understood in particular as a heating gas duct in which at least part of a heating gas flow is conducted in a circuit. Independently of this, a continuous or phased supply of fresh gas to the heating gas flow and / or removal of heating gas from the heating gas flow can preferably also be provided in the case of a closed heating gas flow.
  • a supply of fresh gas and a discharge of heating gas are preferably dimensioned in such a way that with a single passage of the heating gas flow through the heating gas duct at least 40%, preferably at least about 50%, in particular at least approximately 80%, for example at least approximately 90%, of the heating gas flow flowing past a certain point of the heating gas guide reach this point again after the complete passage.
  • the supply of fresh gas and / or the removal of heating gas from the heating gas flow is preferably carried out exclusively in the treatment room sections and / or the air circulation modules of the treatment system.
  • the heating system is assigned a fresh gas supply and / or an exhaust gas discharge, by means of which fresh gas can be supplied or heating gas can be removed from the heating gas flow outside the treatment room sections and / or outside the circulating air modules.
  • the air circulation modules and / or the treatment room sections are preferably part of the heating gas system.
  • the heating gas can preferably at least partially be passed several times through the treatment room sections before it (again) flows through the part of the heating gas duct located outside the recirculation modules and / or outside the treatment room sections.
  • the heating gas duct comprises a circulating air duct which is formed in sections by a plurality of circulating air modules and / or treatment room sections arranged in parallel.
  • a gas flow can preferably be guided in a circulating air circuit, to which heating gas can be fed from the heating gas duct.
  • a partial gas flow of the circulating gas flow of each circulating air module and / or treatment room section can be discharged from the circulating air module and / or the treatment room section, can be guided in a closed circuit by means of the heating gas flow and finally fed back to one or more circulating air modules and / or treatment room sections as part of the heating gas flow .
  • the treatment system preferably comprises a conveyor device, by means of which the workpieces can be fed to the treatment room, removed from the treatment room and / or conveyed through the treatment room in a conveying direction of the conveyor device.
  • the treatment room sections and / or the air circulation modules are preferably arranged one after the other in the conveying direction.
  • the air circulation modules are independent air circulation modules.
  • Each recirculation module preferably forms, together with the associated treatment room section, one, in particular a complete, section of the treatment system.
  • circulating air is not necessarily defined as the gas "air”. Rather, the term “circulating air” preferably denotes a gas which is guided in a circuit (circulating air circuit), which in particular is processed and / or reused several times.
  • supply air does not necessarily refer to the gas “air”, but rather generally refer to a gas fed to the circulating air circuit (supply air, supply air flow) or from the circulating air circuit discharged gas (exhaust air, exhaust air flow).
  • the heating system comprises a heating device and a heat exchanger, by means of which heat generated in the heating device can be transferred to a heating gas conducted in the heating gas duct.
  • the heat exchanger is arranged in particular in an exhaust gas line of the heating device in order to be able to use the heat contained in the exhaust gas of the heating device to heat the heating gas.
  • the treatment system comprises a fresh gas supply that is different from and / or independent of the heating system and by means of which fresh gas can be supplied to the treatment room.
  • the fresh gas can preferably be fed independently of a heating gas flow to the gas flow guided in the circulating air modules and / or treatment room sections and thus to the treatment room.
  • the fresh gas flow is at least partially used as a lock gas flow and fed to the treatment room in this way.
  • the treatment system comprises a fresh gas supply, by means of which fresh gas can be supplied to a heating gas flow guided in the heating gas supply.
  • the fresh gas supply can preferably be controlled and / or regulated by means of a control device, in particular as a function of the current heat demand in the treatment room.
  • a fresh gas flow with at least approximately constant volume flow and / or mass flow can be fed to one or more locks, in particular an inlet lock and / or an outlet lock.
  • a fresh gas flow with a variable volume flow and / or mass flow can be fed to one or more locks, in particular an inlet lock and / or an outlet lock.
  • An at least approximately constant volume flow and / or mass flow is in particular independent of the current heat demand in the treatment room.
  • a variable volume flow and / or mass flow is preferably adapted to and / or controlled and / or regulated as a function of a current heat demand in the treatment room.
  • a fresh gas flow with at least approximately constant volume flow and / or mass flow can be fed to the heating gas flow.
  • a fresh gas flow with a variable volume flow and / or mass flow can be fed to the heating gas flow.
  • a fresh gas flow which in particular has an at least approximately constant volume flow and / or mass flow, is preferably selected such that it covers an average fresh air requirement of the treatment plant of at least approximately 30%, in particular at least approximately 40%, for example approximately 50%.
  • This fresh gas flow is in particular a fresh gas flow supplied to the one or more locks.
  • a further fresh gas flow which in particular has a variable volume flow and / or mass flow, is preferably selected so that it covers an average fresh air requirement of the treatment system of at least approximately 30%, in particular at least approximately 40%, for example approximately 50%.
  • This fresh gas flow is in particular a fresh gas flow fed centrally to the heating gas flow.
  • the fresh gas supply is preferably coupled to the exhaust gas line of the heating device with a heat exchanger, in particular in order to transfer heat from the exhaust gas of the heating device to the fresh gas to be supplied by means of the fresh gas supply.
  • the heat exchanger for heating the fresh gas is preferably a heat exchanger different from the heat exchanger for heating the hot gas.
  • sections of a common heat exchanger that differ from one another are used on the one hand for heating the fresh gas and on the other hand for heating the heating gas.
  • the fresh gas supply and the heating gas supply then have in particular one common heat exchanger.
  • a cold side of the heat exchanger is then preferably divided into several segments.
  • a plurality of segments which can be flown through independently of one another and which are fluidly separated from one another can be provided.
  • the treatment system preferably comprises one or more locks, which are designed in particular as fresh gas locks and through which fresh gas flows or can flow.
  • the treatment system comprises one or more circulating air locks through which circulating air, that is to say a gas flow guided in a circuit, flows or can flow through.
  • circulating air that is to say a gas flow guided in a circuit
  • each circulating air lock is assigned to a circulating air module.
  • the treatment system comprises air locks
  • a fresh gas flow is mixed directly with the heating gas flow or can be mixed in.
  • a separate fresh gas line for supplying fresh gas to the treatment room can be dispensed with.
  • the heating gas duct comprises a central heating gas line, in which heating gas is guided or can be guided and by means of which heating gas from the heating gas duct can be supplied to the several circulating air modules and / or treatment room sections, the heating gas directly or indirectly via the circulating air modules into the respective treatment room sections can be initiated.
  • the heating gas duct thus preferably forms a supply air duct for supplying supply air to the circulating air circuits in the treatment room sections. Furthermore, it can be provided that the heating gas duct comprises a central heating gas line in which heating gas is guided or can be guided and by means of which gas can be discharged from the air circulation modules and / or from the treatment room sections.
  • the heating gas duct thus preferably forms an exhaust air duct for discharging exhaust air from the gas flows circulated in the circulation modules.
  • the heating gas guide comprises a central heating gas line, by means of which a heating gas can be guided in a ring shape from a heat exchanger for heating the heating gas to the multiple air circulation modules and / or treatment room sections and back again to the heat exchanger.
  • the heating gas duct comprises a central heating gas line, by means of which gas, which is used in particular as heating gas, can be removed from one or more recirculation modules and / or treatment room sections and fed to a heat exchanger for heating it and then back to one or more the multiple air circulation modules and / or treatment room sections can be guided.
  • gas which is used in particular as heating gas
  • the heating gas conducted in the heating gas duct can preferably be driven by means of precisely one fan or by means of several fans.
  • the heating gas duct comprises several branches or branches for distributing a heating gas flow guided in the heating gas duct to the circulating air modules and / or treatment room sections.
  • the heating gas duct comprises a main supply line extending along the air circulation modules and / or treatment room sections, from which parts of the heating gas flow can be branched off and fed to the respective air circulation modules and / or treatment room sections.
  • the main supply line can for example run outside the treatment room, in particular outside all treatment room sections, and / or parallel to the conveying direction.
  • the main supply line preferably extends at least approximately over the entire length of the treatment room, in particular in order to be able to supply all circulating air ducts with heating gas.
  • the main supply line runs within the treatment room and / or parallel to the conveying direction.
  • the main supply line can be arranged in an intermediate region between two conveyor units of the conveyor device that run parallel to one another and parallel to the conveying direction.
  • the main supply line is preferably integrated into a floor of the treatment room or arranged directly on the floor of the treatment room.
  • the main supply line extends under the workpieces to be treated and / or is arranged completely below the workpieces to be treated, in particular directly under the workpieces to be treated.
  • the main supply line can contribute to heating the gas flow passed through the treatment room and / or to heating the workpieces to be treated, in particular by means of thermal radiation and / or by convection.
  • the main supply line extends in particular through all treatment room sections and / or into all treatment room sections.
  • the main feed line is designed as a rectangular channel which has a width taken perpendicular to the conveying direction that is at least three times, in particular at least five times, for example at least ten times, a height of the main feed line taken perpendicular to the conveying direction.
  • main supply line opens directly into return lines of the air circulation modules and / or air circulation ducts via inlet valves.
  • the heating gas flow can preferably be divided up in order to ultimately obtain a plurality of supply air flows for supplying the heating gas to the circulating air modules and / or treatment room sections.
  • the heating gas duct has a main branch, by means of which a total heating gas flow can be divided into a first heating gas partial flow and a second heating gas partial flow, the first heating gas partial flow being a first circulating air module or first to nth circulating air module with respect to a conveying direction of a conveying device of the treatment system and / or the first treatment room section or the first to n-th treatment room section can be fed in, and the second heating gas partial flow can preferably be divided among all further circulating air modules and / or treatment room sections.
  • the first air circulation module is preferably a air circulation module assigned to a treatment room section. However, it can also be provided that this first recirculation module is a recirculation module assigned to a recirculation air lock.
  • the heating gas duct comprises several merges for the merging of a plurality of gas flows discharged from the air circulation modules and / or treatment room sections.
  • exhaust air flows from the circulating air modules and / or treatment room sections can preferably be brought together and re-heated as a total heating gas flow and finally fed back to the circulating air modules and / or treatment room sections.
  • the heating gas duct has a main merger, by means of which an exhaust gas flow of a first recirculating air module or first to nth recirculating air module and / or first treatment room section or first to nth treatment room section with an already merged exhaust gas flow with respect to a conveying direction of the conveying device of the treatment system all further air circulation modules and / or treatment room sections can be brought together.
  • a main branch and / or a main junction can serve in particular to reduce the cross-sections of a main supply line and / or a main discharge line of the heating gas line, in particular so that the entire heating gas flow does not have to be passed through the main supply line and / or the main discharge line in a single flow direction.
  • each recirculation module and / or each treatment room section comprises an inlet valve and / or an outlet valve, by means of which a volume flow of a heating gas flow to be supplied to the recirculation module and / or the treatment room section and / or a volume flow from the recirculation module and / or from the Treatment room section discharged gas flow is controllable and / or regulatable.
  • a supply air flow and / or an exhaust air flow of the circulating air flow guided in the respective circulating air module and / or treatment room section can preferably be controlled and / or regulated.
  • the treatment system preferably comprises a control device by means of which the volume flow of the heating gas flow to be supplied to the circulating air module and / or treatment room section and / or the volume flow of the gas flow discharged from the circulating air module and / or from the treatment room section can be controlled and / or regulated.
  • control device by means of the control device by controlling the volume flows, so much heating gas can always be supplied to the respective circulating air module and / or treatment room section that a desired temperature of the circulating air flow in the respective circulating air module and / or treatment room section is essentially constant.
  • the control device is preferably designed and set up in such a way that the functions described can be carried out and / or that the parameters described are adhered to, in particular kept at least approximately constant.
  • the treatment system comprises a control device by means of which an at least approximately constant volume flow of the heating gas flow guided in the heating gas duct can be maintained.
  • a fan of the heating gas supply that drives the heating gas flow is controlled and / or regulated, for example by varying a drive power.
  • the blower (or also called fan) for driving the heating gas flow preferably comprises a frequency converter, via which the control and / or regulation can take place.
  • fluctuations in the total energy requirement of the treatment system in particular fluctuations in the heating requirement, can be compensated for by controlling and / or regulating the fan of the heating gas duct.
  • a setpoint and / or an actual value for a temperature of the heating gas flow can be adapted, in particular if a low volume flow of the heating gas flow has already been set when the heating requirement is low, for example the volume flow has been reduced to a minimum.
  • the temperature of the heating gas flow is first reduced.
  • a predetermined lower limit value of the temperature of the heating gas flow is reached, provision can then also be made for the volume flow to be reduced by suitable control and / or regulation of the fan.
  • the treatment system comprises a control device by means of which an at least approximately constant temperature of the heating gas flow guided in the heating gas duct can be maintained.
  • a bypass volume flow passed by a heat exchanger for heating the heating gas flow is influenced, in particular varied in a targeted manner. For example, a ratio of the volume flow passed through the heat exchanger to heat the heating gas flow to the bypass volume flow can be varied in order to achieve the desired temperature of the heating gas flow guided in the heating gas duct.
  • the heating gas guide comprises one or more bypass lines for bypassing all of the circulating air modules and / or treatment room sections.
  • a reserve of the heating gas flow can be made available, in particular to avoid an undesired undersupply of individual circulating air modules and / or Prevent treatment room sections.
  • an oversupply of heating gas can be maintained in the main supply line of the heating gas guide.
  • the main supply line preferably opens into the bypass line at a downstream end thereof and / or at an end thereof which is rearward with respect to the conveying direction.
  • the bypass line preferably opens into the main discharge line at an upstream end of the main discharge line and / or at an end thereof at the rear with respect to the conveying direction.
  • a bypass line is arranged, for example, upstream of several, in particular all, branches and / or branches of the heating gas duct for supplying heating gas to the circulating air modules.
  • a bypass line is arranged downstream of several, in particular all, merges of the heating gas duct for merging gas flows from the air circulation modules.
  • a bypass line is arranged downstream of several, in particular all, branches and / or branches of the heating gas duct for supplying heating gas to the air circulation modules.
  • a bypass line can be arranged upstream of several, in particular all, merges of the heating gas duct for merging gas flows from the recirculation modules.
  • hot gas can preferably be introduced directly into a discharge section of the heating gas line, in particular in order to always keep a temperature of the gas flow guided in the discharge section above a condensation temperature.
  • the bypass line preferably branches off from the feed section of the heating gas line at an end of a feed section of the heating gas line which is front end with respect to the conveying direction.
  • the bypass line preferably opens into the discharge section of the heating gas line at a downstream end of the main discharge line and / or at an end thereof which is front with respect to the conveying direction.
  • a volume flow of the heating gas flow conducted past the circulating air ducts via the bypass line can preferably be controlled and / or regulated by means of a bypass valve.
  • a pressure in the main supply line of the heating gas duct can be determined by means of a pressure sensor.
  • a heating gas requirement can be determined from this.
  • a flow rate, in particular a fan speed, of a fan for driving the heating gas flow can be controlled and / or regulated by means of a control device, in particular such that the pressure in the main supply line is always within a predetermined pressure range.
  • a control device in particular such that the pressure in the main supply line is always within a predetermined pressure range.
  • the respective positions of the inlet valves and / or the outlet valves can be determined by means of a sensor device and / or by suitable feedback, and when controlling and / or regulating the delivery rate, in particular the fan speed, the fan for driving the heating gas flow can be taken into account.
  • the respective temperatures of the gas flows in the circulating air ducts in particular immediately downstream of the inlet valves, in or on the inlet valves and / or in or on the outlet valves can be determined and during the control and / or regulation the delivery rate, in particular the fan speed, of the blower for driving the heating gas flow can be taken into account.
  • the present invention also relates to a method for treating workpieces.
  • the invention is based on the object of providing a method by means of which workpieces can be treated in a simple and energy-efficient manner.
  • the method according to the invention preferably has one or more of the features and / or advantages described in connection with the treatment system.
  • the treatment system preferably has individual or several features and / or advantages which are described in connection with the method.
  • a “valve” is to be understood as meaning in particular any type of closure element or opening element for influencing a flow rate in a line.
  • a valve can be a flap.
  • the air circulation modules each comprise or form a circulation air duct.
  • a circulating air module is only part of a circulating air duct, namely that part which is used to drive the gas flow guided in the circulating air duct. The further part is then in particular the associated treatment room section.
  • Each recirculation module preferably comprises at least one fan and an intake chamber arranged directly upstream of the fan.
  • a feed channel via which heating gas from a heating gas line of the heating gas duct, in particular one, preferably opens into the intake chamber Main supply line to which the air circulation module can be supplied.
  • the heating gas can preferably be drawn in from the heating gas line by means of the at least one fan of the air circulation module.
  • a main supply line for distributing the heating gas to the air circulation modules extends preferably parallel to a conveying direction of a conveying device of the treatment system and / or over at least approximately an entire length of the treatment room.
  • the main supply line is preferably arranged outside of a housing, the interior of which forms the treatment room.
  • the heating system comprises a main discharge line which extends parallel to the conveying direction of a conveying device of the treatment system and / or over at least approximately an entire length of the treatment room.
  • the main discharge line is preferably used to discharge gas flows discharged from the air circulation modules and / or treatment room sections.
  • the main discharge line is preferably arranged within a housing surrounding the treatment room, in particular by dividing or separating part of the interior of the housing.
  • At least one outlet valve of each recirculation module or each treatment room section for discharging a gas flow from the gas flow in the recirculation module and / or the treatment room section is arranged in a partition which divides an interior of the housing into the treatment room and the main discharge line.
  • cross-conveying of the workpieces, in particular the vehicle bodies is preferably provided.
  • a vehicle longitudinal axis of the vehicle bodies is preferably aligned horizontally and perpendicular to the conveying direction of the conveying device.
  • a main flow direction of the gas flow guided through a treatment chamber section is at least approximately parallel to a vehicle longitudinal axis of the vehicle body conveyed through.
  • the main flow direction is oriented essentially parallel to the vehicle longitudinal axis in such a way that the gas flow flows around the vehicle body from the front to the rear.
  • the main flow direction is aligned such that the gas flow flows around the vehicle body from the rear to the front.
  • a longitudinal conveyor is provided in the treatment system, in which the vehicle longitudinal axis is aligned parallel to the conveying direction of the conveyor device.
  • the treatment system comprises a main treatment system and a pre-treatment system.
  • the main treatment system and the pretreatment system preferably each comprise a separate heating gas duct.
  • a treatment system which includes both a main treatment system and a pretreatment system, preferably comprises two mutually independent, self-contained heating gas ducts, which are in particular thermally coupled to a common heating device.
  • the main treatment plant preferably comprises a heat exchanger for thermal coupling of the main treatment plant with an exhaust gas discharge line of the heating device.
  • the pretreatment system preferably comprises a heat exchanger for thermal coupling of the pretreatment system with the exhaust gas discharge of the heating device.
  • the fresh gas supply for supplying fresh gas to a treatment room of the main treatment system and / or to a treatment room of the pretreatment system comprises a heat exchanger, by means of which the fresh gas supply is thermally coupled to the exhaust gas discharge of the heating device.
  • the one or more heat exchangers are preferably arranged on or in the exhaust gas discharge line.
  • the heat exchanger of the fresh gas supply is preferably arranged downstream or upstream of a heat exchanger of the main treatment system and / or upstream or downstream of a heat exchanger of the pretreatment system with respect to a flow direction of the exhaust gas in the exhaust gas discharge line.
  • a heat exchanger of the main treatment system is preferably arranged upstream or downstream of a heat exchanger of the pretreatment system with respect to a flow direction of the exhaust gas in the exhaust gas discharge line.
  • the heat exchangers are coupled to the exhaust gas discharge line of the heating device in such a way that the exhaust gas discharged from the heating device is first transferred to the heat exchanger of the main treatment system, then to the heat exchanger of the Pretreatment system and then the heat exchanger of the fresh gas supply is supplied or can be supplied.
  • An exhaust gas from the pretreatment system and an exhaust gas from the main treatment system can preferably be brought together and fed to the heating device as a common exhaust gas stream.
  • a heat exchanger of the heating device is designed in several stages.
  • a medium to be supplied to the heat exchanger can preferably be supplied to several heat transfer stages one after the other.
  • the heat transfer stages are preferably arranged in such a way and / or connected to one another in such a fluidically effective manner that a medium to be supplied to the heat exchanger flows through the heat transfer stages one after the other.
  • heat transfer stages of the heat exchanger are preferably arranged with respect to a flow direction of one or more media that are to be fed to the heat exchanger, and / or spatially consecutive, in particular in a row.
  • heat transfer stages of the heat exchanger are arranged spatially one after the other in one direction and a medium, in particular a first medium, can flow through one after the other in this direction.
  • the heat transfer stages are preferably fluidly connected to one another in such a way that a second medium to be supplied to the heat exchanger flows through the heat transfer stages in a flow sequence which differs from a flow sequence of the first medium and / or of a flow order opposite to the flow order of the first medium.
  • heat exchangers can be advantageous if several heat exchangers jointly form a heat exchanger device.
  • the heat exchangers are then in particular heat transfer sections of the heat transfer device that are spatially separated from one another and / or spatially adjoining one another.
  • Each heat exchanger and / or each heat transfer section preferably comprises a plurality of heat transfer stages.
  • the heat transfer sections in particular all the heat transfer stages of all the heat transfer sections, are preferably arranged spatially in a row one after the other and / or through which a medium can flow in series one after the other.
  • the heat transfer stages of all heat transfer sections can be flowed through one after the other with a hot gas forming a heat source.
  • the hot gas is in particular exhaust gas from a heating device, in particular a thermal exhaust gas cleaning device and / or one or more gas turbine devices.
  • a plurality of media, in particular cold gases, which form a heat sink, are preferably provided, which are to be heated by heat transfer from the hot gas.
  • each cold gas to be heated is assigned to each heat exchanger and / or each heat transfer section.
  • Each cold gas can preferably only be heated with a separate heat exchanger and / or heat transfer section.
  • a cold gas can for example be a heating gas, in particular raw gas, circulating air, etc.
  • a cold gas in particular a further cold gas, can be fresh air.
  • the hot gas on the one hand and a cold gas, for example fresh air, on the other can flow through a heat exchanger and / or a heat transfer section in such a way that the hot gas and the cold gas flow through the heat transfer section in countercurrent, in particular based on a flow sequence multiple heat transfer stages.
  • a cold gas for example fresh air
  • the hotter and colder heat transfer stages result from different positions of the heat transfer stages along a flow path of the hot gas.
  • a heat exchanger and / or a heat exchanger device preferably comprises one or more tube bundle heat exchangers, in particular combination tube bundle heat exchangers, or is formed therefrom.
  • the heat exchanger and / or the heat exchanger device preferably comprises a plurality of hollow cylindrical tubes running parallel to one another for the passage of hot gas.
  • cold gas can flow around the pipes in order to transfer heat from the hot gas to the cold gas.
  • a space surrounding the hollow cylindrical tubes is divided into several separated from one another by means of several separating elements Heat transfer areas.
  • cold gas can be brought into contact with the tubes in a targeted manner at different positions along a longitudinal direction of the tubes, in particular to enable heat transfer with different starting temperatures (temperature of the hot gas and / or the tube in the respective heat transfer area). Overheating of the cold gas can thereby preferably be avoided in order to ultimately avoid undesired processes in the cold gas, in particular cracking processes or other chemical and / or thermal conversions.
  • the separating elements are, in particular, separating plates which have openings for leading through and / or receiving the hollow cylindrical tubes.
  • the openings are preferably designed to be complementary to the hollow-cylindrical tubes, in particular in such a way that the partition plates can be pushed onto the hollow-cylindrical tubes as precisely as possible.
  • the heat transfer areas define and / or are in particular the heat transfer stages.
  • the hollow cylindrical tubes of the tube bundle heat exchanger preferably extend over several, in particular all, heat transfer sections for mutually different cold gases.
  • the hollow cylindrical tubes of the tube bundle heat exchanger extend over several, in particular all, heat transfer stages of several, in particular all, heat transfer sections.
  • the hot gas can be passed through all heat transfer stages of all heat transfer sections exclusively by means of completely continuous tubes.
  • the heat transfer areas are particularly fluidly connected to one another by means of a connecting gas duct, preferably in such a way that the cold gas can be passed through several heat transfer areas one after the other.
  • the separating elements preferably prevent or minimize a transfer of gas between individual heat transfer regions along the longitudinal direction of the tubes.
  • a pressure gradient between adjacent heat transfer areas can be generated and / or maintained by means of pressure control and / or pressure regulation, for example using an adapted control device for controlling and / or regulating fans and / or blowers.
  • the pressure gradient between adjacent heat transfer areas can preferably be generated and / or maintained in such a way that colder cold gas with a lower risk of condensation flows from a heat transfer area through a separating element to an adjacent heat transfer area in which comparatively hotter cold gas with a higher risk of condensation is arranged.
  • the cold gases are in particular cold gases that are different from one another.
  • a cold gas with a lower risk of condensation is in particular fresh air and / or air from a pre-dryer.
  • a cold gas with a higher risk of condensation is in particular air from a main dryer.
  • condensation risk is to be understood as meaning a tendency of the gas to partially condense when cooling from the currently prevailing temperature.
  • the risk of condensation is the risk that gaseous solvents will condense out of the cold gas upon contact and / or mixing of the cold gas with gas from an adjacent heat transfer area.
  • two heat transfer areas are separated from one another by means of two separating elements, a gap area being formed between the two separating elements to which sealing air, in particular fresh air, can preferably be supplied.
  • sealing air in particular fresh air
  • direct heating can be provided.
  • hot exhaust gas is generated by means of a gas burner and / or a gas turbine, in particular a micro gas turbine, and is fed to the heating gas duct as a heating gas flow or as a component of the heating gas flow.
  • exhaust gas cleaning can then be provided upstream of the treatment room, for example in order to minimize the entry of pollutants (in particular NOx and CO) or any other undesired exposure of the treatment room with components of the exhaust gas initially generated.
  • exhaust gas from a micro gas turbine can be used for such direct heating.
  • Such a heating gas flow can in particular be used for heating a pre-dryer.
  • indirect heating can be provided for one or more circulating air modules and / or circulating air ducts.
  • this can be advantageous for a main dryer which, for example, is connected to a cathodic dip painting installation.
  • a heat exchanger for example, can be used for such indirect heating.
  • the heating gas guide comprises an exhaust air fan, which in particular has excess Heating gas, which was not required in the air circulation modules and / or air circulation ducts and / or was guided past them, releases into the surroundings of the treatment system, in particular into the atmosphere.
  • the exhaust air fan can preferably ensure a desired exhaust air volume flow and / or exhaust air mass flow from the pre-dryer so that a volume flow of the heating gas flow supplied, for example, with direct heating and a volume flow and / or mass flow of the discharged exhaust air are balanced.
  • two or more volume flow probes in particular standard volume flow probes, can be used, whereby a volume flow probe detects a volume flow and / or mass flow of a total supplied heating gas flow and / or wherein a volume flow probe the sum of the volume flow and / or mass flow of the excess heating gas flow and the volume flow and / or the mass flow of the exhaust air discharged from the treatment room is detected and / or determined.
  • the exhaust fan is preferably regulated in such a way that the supplied volume flow and / or mass flow corresponds to the discharged volume flow and / or mass flow.
  • an injector device is provided as an alternative or in addition to a fan of a respective circulating air module and / or a respective circulating air duct.
  • one or more circulating air modules and / or one or more circulating air ducts each comprise one or more injector devices.
  • An injector device preferably comprises an injector nozzle, by means of which a gas flow can be introduced into the treatment room.
  • the injector nozzle enables, in particular, the supply of the gas flow to the treatment room according to the injector principle.
  • the gas flow is preferably air, in particular superheated air.
  • the gas flow is the heating gas flow.
  • the gas flow can preferably be introduced into the treatment room by means of the injector nozzle at a flow velocity of at least approximately 10 m / s, preferably at least approximately 15 m / s, for example approximately 20 m / s.
  • the gas flow can preferably be introduced into the treatment room by means of the injector nozzle at a flow velocity of at most approximately 40 m / s, preferably at most approximately 30 m / s, for example approximately 25 m / s.
  • the gas flow can be introduced into the treatment room as a jet with a jet diameter of at most approximately 200 mm, preferably at most approximately 150 mm, for example approximately 100 mm, by means of the injector nozzle.
  • the gas stream can be introduced into the treatment room as a jet with a jet diameter of at least approximately 10 mm, preferably at least approximately 50 mm, for example approximately 80 mm, by means of the injector nozzle.
  • the gas stream can preferably be introduced into the treatment space by means of the injector nozzle at a temperature of at least approximately 150 ° C., preferably at least approximately 200 ° C., for example at least approximately 250 ° C..
  • the gas flow by means of the injector nozzle at a temperature of at most approximately 500 ° C., preferably at most about 450 ° C, for example at most about 400 ° C, can be introduced into the treatment room.
  • a gas flow supplied to the treatment room by means of an injector nozzle is directed or can be directed in particular onto the workpieces and / or into an interior of the workpieces to be treated.
  • FIG. 1 The schematically illustrated first embodiment of a treatment system designated as a whole by 100 is used to treat workpieces 102.
  • the treatment system 100 is, for example, a drying system 104 for drying workpieces 102.
  • the workpieces 102 are, for example, vehicle bodies 106.
  • the treatment system 100 is preferably used to dry vehicle bodies 106 that have been previously painted or otherwise treated.
  • the workpieces 102 can be conveyed through a treatment room 112 of the treatment system 100 along a conveying direction 110 by means of a conveying device 108 of the treatment system 100.
  • the treatment room 112 comprises several, for example at least four, in particular at least six, preferably exactly seven, treatment room sections 114 or is formed by these treatment room sections 114.
  • a separate air circulation module 116 is preferably assigned to each treatment room section 114.
  • each circulating air module 116 By means of each circulating air module 116, a gas flow can preferably be guided in a circuit, in particular a circulating air duct 118, and can be guided through the respective treatment room section 114.
  • a circulating air module 116 and a treatment room section 114 each preferably form a circulating air duct 118.
  • Each circulating air module 116 preferably comprises one or more fans 120 for driving the gas flow guided in the circuit.
  • Each recirculation module 116 and / or each treatment room section 114 furthermore preferably comprises an inlet valve 122 and an outlet valve 124.
  • a gas flow serving as a supply air flow can preferably be added to the gas flow guided in the circulating air duct 118.
  • outlet valve 124 By means of the outlet valve 124, a part of the gas flow guided in the circulating air duct 118 can preferably be discharged.
  • an exchange of the gas flow guided in the circulating air duct 118 can thus be carried out.
  • This exchange of the gas flow guided in the circulating air duct 118 serves in particular to control and / or regulate certain parameters of the gas flow guided in the circulating air duct 118.
  • a temperature of the gas flow guided in the circulating air duct 118 can thereby be controlled and / or regulated.
  • the gas flow guided in the circulating air duct 118 can be heated by supplying heating gas.
  • This heat input then in turn serves to heat the workpiece 102 to be treated, in particular to dry a workpiece 102 embodied as a vehicle body 106.
  • the gas to be supplied to each circulating air duct 118 is preferably a heating gas, which can be provided to the treatment system 100 by means of a heating system 126.
  • the heating system 126 preferably comprises a heating device 128, which is designed, for example, as a thermal exhaust gas cleaning device 130.
  • a hot exhaust gas can preferably be generated, which can be discharged from the heating device 128 via an exhaust gas discharge line 132.
  • the heating system 126 preferably further comprises at least one heat exchanger 134, which is thermally coupled to the exhaust line 132 in order to use the heat of the exhaust gas to heat a further medium.
  • This further medium is, for example, a heating gas which is guided or can be guided in a closed heating gas duct 136.
  • the heating gas duct 136 is in particular a circulating air duct in which at least a large part of the heating gas guided therein is guided or can be guided in a circuit.
  • the heating gas guide 136 preferably comprises a heating gas line 138 and one or more fans 120 for driving the heating gas guided in the heating gas line 138.
  • the exhaust gas discharge line 132 of the heating device 128 is preferably thermally coupled to the heating gas line 138 by means of a heat exchanger 134 of the heating system 126.
  • the heating gas line 138 preferably comprises a feed section 140 which connects the heat exchanger 134 to the circulating air modules 116 and / or the treatment room sections 114.
  • heated heating gas can be fed to the circulating air ducts 118 and thus to the treatment room sections 114 via the feed section 140 of the heating gas line 138.
  • the heating gas line 138 also includes a discharge section 142, via which gas discharged from the circulating air ducts 118 can be discharged and fed to the heat exchanger 134 for reheating.
  • the feed section 140 of the heating gas line 138 preferably comprises a plurality of branches 144 or branches 146 in order to distribute a total flow of heating gas to the individual circulating air modules 116 and / or treatment room sections 114.
  • the discharge section 142 preferably comprises a plurality of conduits 148 in order to discharge the individual ducts from the circulating air ducts 118 Combine (partial) gas flows and be able to feed them again to the heat exchanger 134 as a common gas flow.
  • the heating gas duct 136 preferably also comprises a bypass line 150, by means of which a partial gas flow of the total heating gas flow fed to the circulating air ducts 118 via the feed section 140 of the heating gas line 138 can be guided past all the circulating air modules 116 and / or treatment room sections 114 and can be fed directly to the discharge section 142.
  • an oversupply of heating gas can preferably be provided in front of the circulating air ducts 118 in order to always have a sufficient amount of heating gas available in the circulating air ducts 118 even if the demand for heating gas fluctuates.
  • a volume flow of the heating gas flow conducted past the circulating air ducts 118 via the bypass line 150 can preferably be controlled and / or regulated by means of a bypass valve 152.
  • the heating gas duct 136 preferably comprises one or more control devices 154 for controlling and / or regulating the fan 120 and / or the inlet valves 122 and / or the outlet valves 124 and / or the bypass valve 152 of the bypass line 150.
  • a distribution of the heating gas flow to the circulating air ducts 118 can thus be controlled and / or regulated.
  • a total volume flow and / or a temperature of the heating gas flow can be controlled and / or regulated by means of the one or more control devices 154.
  • the heating gas duct 136 can furthermore include a bypass line 150 in the region of the heat exchanger 134.
  • this bypass line 150 and by means of a bypass valve 152 assigned to this bypass line 150, it is preferably controllable and / or regulatable which partial volume flow of the total heating gas flow is passed through the heat exchanger 134 for heating it or bypassed it.
  • a constant temperature of the heating gas flow downstream of the heat exchanger 134 and the bypass line 150 and / or upstream of the circulating air ducts 118 can thereby be controlled and / or regulated.
  • the heating gas line 138 in particular the feed section 140 of the heating gas line 138, comprises a main feed line 156.
  • This main supply line 156 preferably runs outside the treatment room 112 parallel to the conveying direction 110.
  • the main supply line 156 preferably extends at least approximately over the entire length of the treatment room 112 in order to be able to supply all of the circulating air ducts 118 with heating gas.
  • the heating gas line 138 in particular the discharge section 142 of the heating gas line 138, preferably comprises a main discharge line 158.
  • the main discharge line 158 is preferably arranged outside the treatment room 112 or integrated into it.
  • the main discharge line 158 extends parallel to the conveying direction 110 and / or at least approximately over an entire length of the treatment space 112. In this way, all of the (partial) gas flows discharged from the circulating air ducts 118 can preferably be discharged.
  • the bypass line 150 for bypassing all circulating air ducts 118 is preferably arranged at a rear end of the main supply line 156 and / or the main discharge line 158 with respect to the conveying direction 110 of the conveying device 108.
  • the treatment system 100 further comprises a fresh gas supply 160 for supplying fresh gas to the treatment room 112.
  • the fresh gas supply 160 preferably comprises a fresh gas line 162 and a blower 120 for driving a fresh gas flow in the fresh gas line 162.
  • the fresh gas feed 160 preferably comprises a heat exchanger 134, by means of which the fresh gas line 162 and the exhaust gas discharge line 132 of the heating device 128 are thermally coupled to one another.
  • the fresh gas supplied via the fresh gas supply 160 can thereby be heated before it is supplied to the treatment room 112.
  • the fresh gas line 162 preferably opens into the treatment room 112 in the area of an inlet section 164 in which the workpieces 102 are fed into the treatment room 112, and / or in the area of an outlet section 166 in which the workpieces 102 are discharged from the treatment room 112.
  • an inlet lock 168 and / or an outlet lock 170 in the area of the outlet portion 166 are provided in the area of the inlet section 164.
  • one or more intermediate locks can be provided.
  • the fresh gas supplied via the fresh gas supply 160 serves in particular as a lock gas, with which it is possible to avoid the gas which is led in the circulating air ducts 118 from passing through the inlet section 164 and / or the outlet section 166 is released to the outside of the treatment system 100.
  • the volume flow of the fresh gas flow is preferably selected in such a way that, starting from the inlet section 164 and / or the outlet section 166, there is a cross flow along or against the conveying direction 110 and thus transversely to the gas flows guided in the circulating air ducts 118.
  • An upstream end of an exhaust gas discharge 172 of the treatment system 100 is therefore preferably provided essentially centrally with respect to the conveying direction 110 on the treatment space 112.
  • an exhaust gas stream can be discharged from the treatment space 112 via the exhaust gas discharge 172 and preferably fed directly to the heating device 128.
  • the heating device 128 can be used to clean the exhaust gas using energy contained in the exhaust gas and / or released during combustion.
  • the treatment system 100 described above functions as follows: To heat and / or dry the workpieces 102, they are conveyed by means of the conveying device 108 through the inlet lock 168 into the treatment room 112. In the treatment room 112, the workpieces 102 pass through the treatment room sections 114 one after the other.
  • Treatment room sections 114 are flowed through with a gas flow guided in a circuit, which has a temperature that is higher than the temperature of the workpiece 102, so that the workpiece 102 is heated due to the flow around and / or against the gas flow or a predetermined temperature maintains.
  • the initially relatively cold workpiece 102 absorbs the greatest amount of heat in a first treatment room section 114 with respect to the conveying direction 110, so that the recirculation module 116 and / or the recirculation duct 118 of this first treatment room section 114 must provide the greatest heating output.
  • the subsequent treatment room sections 114 preferably produce continuously lower heating outputs.
  • the respective heating output is achieved by supplying heating gas from the heating system 126 to the respective circulating air module 116 and / or the respective treatment room section 114.
  • This heating gas has a higher temperature than the gas flow guided in the circulating air duct 118 in order to ultimately heat the entire gas flow guided in the circulating air duct 118 and thus also the workpiece 102.
  • the heating gas is provided in that it is heated by means of a heat exchanger 134 using hot exhaust gas from the heating device 128.
  • the heating gas is heated to a temperature of at least approximately 200.degree. C., preferably at least approximately 250.degree. C., for example approximately 270.degree.
  • a corresponding partial gas volume flow of the gas flow guided in the circulating air duct 118 is preferably discharged from the circulating air duct 118.
  • the exhaust gas discharged is then cleaned in the heating device 128, in particular by burning the substances contained therein.
  • Exhaust gas from the heating device 128 is then removed via the exhaust gas discharge line 132.
  • the heat contained in this exhaust gas is used to heat the fresh gas supplied via the fresh gas supply 160 and / or the heating gas carried in the heating gas supply 136.
  • the illustrated second embodiment of a treatment system 100 differs from that in Fig. 1
  • the illustrated first embodiment essentially in that the heating gas line 138 comprises a main branch 180 and / or a main junction 182.
  • the main branch 180 preferably serves to divert the heated total flow of heating gas already when it is fed to the main feed line 156, on the one hand, to a circulating air duct 118 and first with respect to the conveying direction 110 on the other hand, to be distributed over all the remaining air circulation guides 118.
  • a flow cross section of the main supply line 156 can be minimized, since the entire heating gas flow for all circulating air ducts 118 does not have to be guided through the main supply line 156, for example, along the conveying direction 110.
  • a partial volume flow of hot gas can be branched off for the first circulating air duct 118 with respect to the conveying direction 110, which must provide the greatest heating power in comparison with the further circulating air ducts 118, and fed to this circulating air duct 118 against the conveying direction 110.
  • the main merger 182 preferably serves to merge a partial gas flow discharged from the first circulating air duct 118 with respect to the conveying direction 110 with the partial gas flows which were discharged from all other circulating air ducts 118. In this way, a line cross section of the main discharge line 158 can preferably be minimized.
  • FIG. 3 The illustrated third embodiment of a treatment system 100 differs from that in FIG Fig. 2
  • the fresh gas to be supplied to the treatment room 112 is at the in Fig. 3
  • the illustrated third embodiment of the treatment system 100 can consequently be fed via the heating gas line 138, in particular the feed section 140 of the heating gas line 138, to the circulating air ducts 118 and thus to the respective treatment room sections 114.
  • the inlet lock 168 and the outlet lock 170 can preferably be flowed through with circulating air.
  • separate circulating air modules 116 or the circulating air modules 116 of the respectively adjacent treatment room sections 114 are assigned to the inlet lock 168 or the outlet lock 170.
  • conditioned or unconditioned fresh air or other fresh gas is supplied to the heating gas flow, in particular immediately upstream of a heat exchanger 134 for heating the heating gas flow and / or immediately upstream of a fan 120 for driving the heating gas flow in the heating gas duct 136.
  • a separate fresh gas duct 160 can be reduced to a minimum or avoided entirely.
  • separate channels, lines and / or insulation for supplying fresh air or other fresh gas to the inlet section 164 and / or the outlet section 166 can be saved.
  • the illustrated embodiment of a circulating air duct 118 is an example of a circulating air duct 118 of a treatment system 100 according to FIG Fig. 1 , 2 , 3 or 11 .
  • the circulating air module 116 of the circulating air duct 118 is assigned to a treatment room section 114 of the circulating air duct 118, so that a gas stream guided in a circulating air circuit can flow through this treatment room section 114.
  • the circulating air module 116 is coupled to a main supply line 156 of a treatment system 100 in order to be able to supply the circulating air module 116 and / or the circulating air duct 118 formed by the circulating air module 116 and / or the treatment room section 114 with heating gas.
  • the recirculation module 116 includes one or more fans 120 for driving the gas flow in the recirculation duct 118.
  • the circulating air duct 118 preferably comprises the one or more blowers 120, a pressure chamber 190, the treatment space section 114, a return line 192 and / or a suction space 194.
  • the pressure chamber 190 is in particular arranged immediately downstream of the one or more blowers 120 and is preferably used to equalize a gas flow to be fed to the treatment room section 114 and to distribute the gas flow to a plurality of feed openings 196 for feeding the gas flow to the treatment room section 114.
  • the gas flow introduced into the treatment chamber section 114 via the supply openings 196 can preferably be partially discharged from the treatment chamber section 114 via one or more return openings 198 and supplied to the suction chamber 194 via the return line 192.
  • a further part of the gas flow supplied to the treatment space section 114 via the supply openings 196 is preferably via discharge openings 200 can be removed from the circulating air duct 118 and from the treatment room section 114 and can be fed to the main removal line 158.
  • the feed openings 196, the return openings 198 and / or the discharge openings 200 are preferably arranged in such a way that preferably at least a large part of the gas flow guided through the treatment chamber section 114 is fed or can be fed in on one side of the workpiece 102 and on a further side opposite this side Workpiece 102 can be or is removed from the treatment space section 114. This preferably results in an optimized flow through the treatment space section 114 and an optimized heating of the workpiece 102.
  • Fig. 5 it can be provided that, in addition to the feed openings 196 preferably arranged in a side wall of the treatment room section 114, further feed openings 196 are provided, which are arranged in a bottom 202 that delimits the treatment room section 114 at the bottom.
  • the workpiece 102 can preferably be flowed onto from below by means of these additional feed openings 196.
  • the gas flow is fed to the feed openings 196 arranged in the floor 202 from the pressure chamber 190 via one or more floor ducts 204 running below the floor 202 or in the floor 202.
  • two such bottom ducts 204 are provided in order to supply the gas flow to the additional supply openings 196.
  • These two bottom channels 204 are preferably arranged on both sides of the return line 192 (see in particular Fig. 7 ).
  • the suction chamber 194 is preferably arranged directly upstream of the one or more blowers 120, so that gas located in the suction chamber 194 can be sucked in via the one or more blowers 120.
  • the return line 192 opens into the suction space 194. Furthermore, it can be provided that the suction space 194 is formed by an end of the return line 192 arranged downstream.
  • Heating gas is preferably fed from the main feed line 156 into the circulating air duct 118 via the suction chamber 194.
  • a feed channel 206 is provided which connects the main feed line 156 to the suction chamber 194 in a fluid-effective manner.
  • a valve in particular the inlet valve 122, is preferably arranged in the supply channel 206 or at one or both ends thereof (in the Figures 4 to 10 not shown).
  • the amount (the volume flow) of the heating gas supplied to the circulating air duct 118 can be controlled and / or regulated.
  • heating gas from the main supply line 156 can be easily and energy-efficiently mixed into the gas flow guided in the circulating air duct 118 by means of the one or more fans 120.
  • a uniform mixing of the supplied heating gas and the remaining gas flow guided in the circulating air duct 118 is also preferably ensured.
  • the gas flow fed to the treatment space section 114 is thus preferably a homogeneous gas flow with a preferably constant temperature despite the admixture of the heating gas.
  • heating gas can be fed from the main supply line 156 directly into a floor duct 204 in order to ultimately use the additional supply openings 196 to separate individual areas of the treatment room section 114 and / or to heat the workpiece 102 more than the remaining areas.
  • the main discharge line 158 is preferably integrated into a housing 208 surrounding the treatment room section 114.
  • the housing 208 is, for example, essentially cuboid.
  • the main discharge line 158 is formed, for example, by separating off part of the cuboid interior of the housing 208. In particular, it can be provided here that an upper corner region of the interior of the housing 208 for producing the main discharge line 158 is divided off from the treatment room section 114.
  • the main feed line 156 is preferably arranged outside the housing 208.
  • the main supply line 156 is likewise formed by dividing a region of the interior of the housing 208.
  • the air circulation module 116 described above and the air circulation system 118 implemented thereby preferably function as follows: A gas flow is driven by means of the fan 120 and is first fed to the pressure chamber 190.
  • the gas flow is introduced into the treatment space section 114 via feed openings 196, which can optionally be provided with valves.
  • At least one workpiece 102 is preferably arranged, which absorbs heat from the gas flow by flowing around it with the gas flow and is thereby heated. In particular, the workpiece 102 is thereby dried.
  • the gas passed through the treatment chamber section 114 is discharged via one or more return openings 198 and a return line 192 and fed to a suction chamber 194.
  • the gas located therein is finally sucked in again from this suction chamber 194 via the one or more blowers 120, so that a circuit is formed for the gas guided through the treatment chamber section 114.
  • the circulating gas cools down, in particular because of the heat transfer to the workpieces 102.
  • This heating gas is provided via the main supply line 156 and, if necessary, branched off via the supply channel 206 and supplied to the suction chamber 194. In particular, through the connection of the feed channel 206 to the suction chamber 194 by means of the one or more blowers 120, the heating gas is sucked in from the main feed line 156 as required.
  • a part of the gas flow guided in the air circulation duct 118 is discharged from the air circulation duct 118.
  • a total volume flow of the gas flow guided in the air circulation duct 118 can thereby be kept constant despite the supply of heating gas.
  • the discharged gas is discharged via the main discharge line 158.
  • a treatment system 100 preferably comprises, for example according to one of the Fig. 1 to 3 or 11 , several of the in the Figures 4 to 10
  • the circulating air modules 116 and / or treatment room sections 114 can be flowed through preferably perpendicular to the conveying direction 110 with the gas flow guided in the respective circulating air duct 118.
  • a cross flow between two or more air circulation modules 116 and / or air circulation guides 118 is preferably minimal.
  • a transverse flow with a component parallel to the conveying direction 110 is preferably produced solely on the basis of fresh gas supplied to the treatment space 112 and / or on account of the removal of exhaust gas from the treatment space 112 (see in particular FIG Fig. 1 and 2 ).
  • the described embodiments of the treatment system 100 and / or the circulating air module 116 and / or the circulating air duct 118 and / or the treatment room sections 114 are particularly suitable for use in what is known as a transverse mode of operation, in which the workpieces 102, in particular the vehicle bodies 106, transversely, in particular vertically, to the conveying direction 110 through the treatment room 112.
  • a vehicle longitudinal axis is aligned horizontally and essentially perpendicular to the conveying direction 110.
  • the described embodiments can also be used in what is known as longitudinal conveyance of the workpieces 102, in which the vehicle longitudinal direction is aligned parallel to the conveying direction 110.
  • the fourth embodiment of a treatment system 100 illustrated differs from that in FIG Fig. 1
  • the first embodiment illustrated essentially in that the treatment system 100 comprises a main treatment system 220 and a pretreatment system 222.
  • the main treatment system 220 is, for example, a main dryer 224.
  • the pretreatment system 222 is, for example, a pre-dryer 226.
  • the main treatment facility 220 is substantially identical to that with respect to FIG Fig. 1 described first embodiment of a treatment system 100 is formed.
  • the pretreatment system 222 is thus an optional addition for a treatment system 100 according to one of the described embodiments, in particular the first embodiment.
  • the pretreatment system 222 is preferably also essentially a treatment system 100 according to one of the described embodiments, in particular according to the first embodiment.
  • the pretreatment system 222 is dimensioned smaller than the main treatment system 220.
  • the pretreatment system 222 comprises a smaller treatment room 112 and / or preferably fewer treatment room sections 114 than the main treatment system 220.
  • a pretreatment system 222 comprises only three or four treatment room sections 114.
  • the pretreatment system 222 preferably comprises a heating gas system 136 that is different and / or independent from the heating gas duct 136 of the main treatment system 220.
  • heating gas can be fed to the air circulation modules 116 and / or treatment room sections 114 of the pretreatment system 222 independently of the heating gas duct 136 of the main treatment system 220.
  • the heating gas duct 136 of the pretreatment system 222 is preferably thermally coupled to the exhaust gas discharge line 132 of the heating device 128 by means of a separate heat exchanger 134.
  • the heat exchanger 134 for thermal coupling of the pretreatment system 222 with the exhaust gas discharge line 132 of the heating device 128 can be arranged in relation to the flow direction of the exhaust gas from the heating device 128 in the exhaust gas discharge line 132 upstream or downstream of the heat exchanger 134 for the thermal coupling of the main treatment system 220 with the exhaust gas discharge line 132 of the heating device 128 .
  • the heat exchanger 134 of the pretreatment system 222 is preferably arranged downstream of the heat exchanger 134 of the main treatment system 220.
  • the heat exchanger 134 for coupling the fresh gas supply 160 to the exhaust gas discharge line 132 of the heating device 128 is preferably arranged downstream of the heat exchanger 134 of the main treatment system 220 and / or downstream of the heat exchanger 134 of the pretreatment system 222.
  • the use of the heat present in the exhaust gas from the heating device 128 can be optimized due to the mostly low fresh gas temperature (fresh air temperature).
  • the entire treatment system 100 preferably comprises a single heating device 128, by means of which the heat for both the heating gas supply 136 of the main treatment system 220 as well as for the heating gas guide 136 of the pretreatment system 222 can be provided.
  • the treatment system 100 can include a common fresh gas supply 160 for supplying fresh gas to both the treatment room 112 of the main treatment system 220 and the treatment room 112 of the pretreatment system 222.
  • the treatment system 100 comprises two fresh gas feeds 160, one fresh gas feed 160 being assigned to the main treatment system 220 and a further fresh gas feed 160 being assigned to the pretreatment system 222 (not shown in the figures).
  • An exhaust gas from the pretreatment system 222 can preferably be fed to the exhaust gas discharge 172 of the main treatment system 220 by means of an exhaust gas discharge 172 of the pre-treatment system 222.
  • the exhaust gas from the pretreatment system 222 can thus preferably be fed together with the exhaust gas from the main treatment system 220 to the common heating device 128.
  • the workpieces 102 to be treated can preferably be conveyed through the treatment room 112 of the pretreatment system 222 and then through the treatment room 112 of the main treatment system 220 by means of a conveyor device 108, in particular a single conveyor device 108.
  • Fig. 11 the pretreatment system 222 and the main treatment system 220 are shown spaced apart from one another. This is preferably only used to illustrate the functionality. However, it can also be provided that the pretreatment system 222 and the main treatment system 220 are arranged directly one after the other.
  • a lock designed as an intermediate lock can fluidically separate the treatment rooms 112 which are otherwise directly adjacent to one another. This intermediate lock then simultaneously forms an outlet lock 170 of the pretreatment system 222 and an inlet lock 168 of the main treatment system 220.
  • the pretreatment system 222 is provided in addition to the main treatment system 220 and includes a separate heating gas duct 136, a simple and efficient subdivision of the total to the can be achieved, particularly in the event of heavy evaporation of the workpieces 102 to be treated or other severe contamination of the gas flows passed through the treatment room sections 114 Treatment room 112 belonging to the treatment system 100 can be realized.
  • the treatment system 100 in particular both the main treatment system 220 and the pretreatment system 222, each taken individually, in terms of structure and function, are identical to those in FIG Fig. 1 first embodiment shown, so that reference is made to the preceding description thereof.
  • the fifth embodiment of a treatment system 100 shown differs from that in FIG Fig. 1
  • the additional bypass line 150 branches in particular upstream of the main supply line 156, in particular upstream of all branches 144 and / or branches 146, from the feed section 140 of the heating gas line 138.
  • the additional bypass line 150 is preferably arranged at a front end of the main supply line 156 and / or the main discharge line 158 with respect to the conveying direction 110 of the conveying device 108, that is to say preferably in the area of an inlet section 164 of the treatment system 100.
  • a volume flow of the heating gas flow conducted past the circulating air ducts 118 via the bypass line 150 can preferably be controlled and / or regulated by means of a bypass valve 152.
  • the additional bypass line 150 preferably opens into the discharge section 142, in particular downstream of the main discharge line 158, for example downstream of all junctions 148.
  • a partial gas flow from the feed section 140 can preferably be guided past the recirculation modules 116 and / or recirculation ducts 118, bypassing the main supply line 156 and the main discharge line 158.
  • relatively hot gas can be introduced directly into the discharge section 142 in order to heat the gas stream to be discharged as a whole by means of the discharge section 142.
  • the gas stream is heated in particular to a temperature which prevents undesired condensation from forming.
  • the bypass valve 152 of the bypass line 150 and thus the supply of hot gas to the discharge section 142 are preferably controlled in such a way that an actual temperature of the gas flow guided in the discharge section 142 is always above the condensation temperature lies.
  • regulation is provided on the basis of a predetermined minimum temperature setpoint.
  • FIG. 13 The sixth embodiment of a treatment system 100 illustrated differs from that in FIG Fig. 2 illustrated second embodiment essentially in that according to the in Fig. 12 illustrated fifth embodiment, an additional bypass line 150 is provided.
  • the sixth embodiment of a treatment system 100 thus agrees with the basic structure and function with that in FIG Fig. 2 illustrated second embodiment, so that reference is made to the preceding description thereof.
  • the sixth embodiment of a treatment system 100 corresponds to that in FIG Fig. 12 the fifth embodiment shown, so that reference is made to the preceding description thereof.
  • bypass lines 150 can be added or omitted if necessary.
  • the in Fig. 3 The illustrated embodiment of a treatment system 100, if required, with an additional bypass line 150 according to the in Fig. 12 be provided fifth embodiment shown.
  • the seventh embodiment of a treatment system 100 illustrated differs from that in FIG Fig. 13 illustrated sixth embodiment essentially in that the fresh gas line 162 is a branch 146, by means of which different volume flows and / or mass flows of the fresh gas can optionally be supplied as lock gas or as fresh gas supplied in addition to the heating gas flow.
  • the fresh gas line 162 opens, on the one hand, into the inlet lock 168 and the outlet lock 170 and, on the other hand, into the heating gas duct 136, for example into the discharge section 142 of the heating gas duct 136.
  • a variable proportion of the fresh gas supplied which depends in particular on the parameters varying in the treatment room 112, is preferably supplied to the heating gas flow in the heating gas duct 136.
  • a supply is provided upstream of the fan 120 and / or the heat exchanger 134 of the heating gas duct 136 in order to be able to condition the heating gas flow mixed with fresh gas before it is supplied to the treatment room 112.
  • FIG. 15 The eighth embodiment of a treatment system 100 shown differs from that in particular in FIG Figures 4 to 10 The embodiment shown essentially in that the main supply line 156 of the heating gas duct 136 runs within the treatment room 112.
  • the main supply line 156 extends in particular below the workpieces 102 to be treated.
  • the main supply line 156 is designed in particular as, for example, a flat, rectangular channel and is fixed on a floor 202 of the treatment room 112.
  • Such a configuration makes it possible in particular to dispense with thermal insulation of the main supply line 156.
  • Simple admixing flaps are preferably provided as inlet valves 122 between the main supply line 156 and a return line 192 of each circulating air module 116. Separate feed channels 206 can then also be dispensed with.
  • the main supply line 156 is arranged between two conveyor lines of the conveyor device 108.
  • the main supply line 156 can serve, for example, as a radiation element for heating the workpieces 102 within the treatment room 112.
  • a flow direction of the heating gas guided in the main supply line 156 preferably corresponds to the conveying direction 110 of the conveying device 108.
  • FIG. 15 The illustrated embodiment of the treatment system 100 in terms of structure and function with that in FIGS Figures 4 to 10 illustrated embodiments match, so that reference is made to the preceding description thereof.
  • FIG. 16-21 Various embodiments of heat exchanger devices 300 are shown, which form and / or can replace individual or several of the heat exchangers 134 described above.
  • a plurality of the heat exchangers 134 described above are formed jointly by one of the heat exchanger devices 300 described below.
  • the illustrated first embodiment of a heat transfer device 300 comprises several heat transfer stages 302, through which a cold gas to be heated can be passed one after the other.
  • a heat-emitting hot gas also flows through the heat transfer stages 302 one after the other.
  • the hot gas flows through, for example, a multiplicity of hollow cylindrical tubes 304 which extend linearly through, for example, four heat transfer stages 302.
  • the heat transfer stages 302 are, for example, a first heat transfer stage 302a, a second heat transfer stage 302b, a third heat transfer stage 302c and a fourth heat transfer stage 302d.
  • the cold gas flows through a space 306 surrounding the hollow cylindrical tubes 304.
  • the space 306 surrounding the hollow cylindrical tubes 304 is subdivided by means of a plurality of separating elements 308, which results in the heat transfer stages 302 which are separate from one another.
  • the separating elements 308 in particular extend essentially perpendicular to a longitudinal direction of the hollow cylindrical tubes 304.
  • the heat transfer stages 302 are thus flowed through on the one hand by the heat-emitting hot gas and the heat-absorbing cold gas, in particular in a cross flow.
  • the heat transfer stages 302 can for example have different dimensions, in particular depending on the position of the separating elements 308 along the hollow cylindrical tubes 304.
  • a comparatively narrow first heat transfer stage 302a can be provided, which is followed by three larger or wider heat transfer stages 302b, 302c, 302d.
  • the heat transfer stages 302, in particular the spaces 306 of the heat transfer stages 302 surrounding the hollow cylindrical tubes 304 and separated from one another by means of the separating elements 308, are fluidly connected to one another by means of a gas duct 310 such that, for example, the cold gas can flow through the heat transfer stages 302 one after the other in a predetermined order.
  • the illustrated first embodiment of the heat transfer device 300 provides that the cold gas first flows through the first heat transfer stage 302a and then successively through the fourth heat transfer stage 302d, then through the third heat transfer stage 302c and finally through the second heat transfer stage 302b.
  • the temperature in the heat transfer stages 302 decreases from the first heat transfer stage 302a to the fourth heat transfer stage 302d.
  • the cold gas thus first flows through the hottest heat transfer stage 302 and then the remaining ones Heat transfer stages 302 one after the other with increasing temperature level.
  • the heat exchanger device 300 By suitably designing the heat exchanger device 300, in particular undesired overheating of the cold gas to be heated can be avoided. In this way, the risk of a material conversion of individual components of the cold gas can be reduced or avoided entirely.
  • FIG. 17 The illustrated second embodiment of a heat exchanger device 300 differs from that in FIG Fig. 16 illustrated first embodiment essentially in that the heat transfer device 300 comprises two separate heat transfer sections 312.
  • a different cold gas to be heated is assigned to each heat transfer section 312.
  • a heat transfer section 312 is provided for heating a heating gas flow. Downstream of this, for example, a heat transfer section 312 is provided for heating a fresh gas flow.
  • the heat transfer sections 312 taken individually are each divided into three heat transfer stages 302.
  • the heat transfer section 312 for heating the heating gas flow is flowed through with the heating gas, for example, in such a way that a first heat transfer stage 302a, then a third heat transfer stage 302c and finally a second heat transfer stage 302b are flown through.
  • the heat transfer stages 302 of the heat transfer section 312 for heating the fresh gas are preferably flowed through by the hot gas and the cold gas in the same order, that is, successively through the first heat transfer stage 302a, then the second heat transfer stage 302b and finally the third heat transfer stage 302c.
  • the illustrated second embodiment of the heat exchanger device 300 is thus in particular a combination heat exchanger, by means of which two different cold gases can be heated using a single hot gas.
  • the heat transfer device 300 comprises one or more bypass lines 150, by means of which, for example, hot gas can be guided past one or more heat transfer stages 302.
  • one or more cold gas flows can be conducted past the associated one or more heat transfer stages 302 by means of one or more bypass lines 150.
  • a bypass valve 152 can be provided for controlling the respective bypass volume flow.
  • FIG. 18 The third embodiment of a heat transfer device 300 illustrated differs from that in FIG Fig. 17 illustrated second embodiment essentially in that two heat transfer sections 312 for heating a cold gas, in particular the fresh gas flow, are provided, between these two heat transfer sections 312 a heat transfer section 312 for heating another cold gas, in particular the heating gas flow, is provided.
  • the first heat transfer stage 302a is for example arranged with respect to the hot gas flow upstream of the entire heat transfer section 312 for heating the hot gas flow, while the two further heat transfer stages 302b, 302c for heating the fresh gas flow are arranged downstream of the heat transfer section 312 for heating the hot gas flow.
  • overheating of the heating gas flow can be reduced by first cooling the hot gas flow with the fresh gas flow before it is used to heat the heating gas flow.
  • FIG. 19 The fourth embodiment of a heat transfer device 300 illustrated differs from that in FIG Fig. 17 illustrated second embodiment essentially in that three heat transfer sections 312 are provided for three different cold gases.
  • each heat transfer section 312 comprises two heat transfer stages 302.
  • a heat transfer section 312 for heating a heating gas flow for a main dryer, a heat transfer section 312 for heating a heating gas flow for a pre-dryer and finally a heat transfer section 312 for heating a fresh gas flow are preferably arranged one after the other.
  • a pressure gradient within the entire heat transfer device 300, in particular within the entire space 306 surrounding the hollow cylindrical tubes 304, is preferably selected so that any leakage flows that flow through the separating elements 308 from one heat transfer stage 302 to the adjacent do not cause any undesired condensation.
  • a pressure in the central heat transfer section 312 is selected to be higher than in the adjacent heat transfer sections 312, so that the cold gas conducted in the central heat transfer section 312, in particular the heating gas flow for the pre-dryer, reaches the adjacent heat transfer sections 312 in the event of leaks and not the other way around.
  • this can preferably prevent hot gas with a high risk of condensation from reaching colder areas (heat transfer stages 302) of the heat transfer device 300.
  • FIG. 20 The fifth embodiment of a heat transfer device 300 illustrated differs from that in FIG Fig. 19
  • a gap area 314 between the two separating elements 308 can then be flushed, for example, with a barrier gas, for example barrier air, in particular fresh gas.
  • a barrier gas for example barrier air, in particular fresh gas.
  • Fig. 21 a schematic perspective illustration of a heat transfer device 300 is shown.
  • This illustration contains the hollow cylindrical tubes 304 and the separating elements 308 merely as an example.
  • the separating elements 308 are provided with passages 316 and / or receptacles 318 for the hollow cylindrical tubes 304. In particular, the separating elements 308 can be pushed onto a bundle of hollow cylindrical tubes 304.
  • the separating elements 308 are in particular plate-shaped and flat.
  • the illustrated embodiment of the heat exchanger device 300 is in particular a tube bundle heat exchanger 320 and can be used for all the heat exchanger 134 and / or heat exchanger devices 300 described are used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)
  • Furnace Details (AREA)
  • Treating Waste Gases (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Tunnel Furnaces (AREA)
EP20182366.3A 2015-12-10 2016-12-12 Installation de traitement et procédé de traitement de pièces Pending EP3745066A3 (fr)

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DE102015224916.6A DE102015224916A1 (de) 2015-12-10 2015-12-10 Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
PCT/EP2016/075206 WO2017097483A1 (fr) 2015-12-10 2016-10-20 Installation de traitement et procédé pour traiter des pièces
EP16819831.5A EP3387355B1 (fr) 2015-12-10 2016-12-12 Plante de traitement et procédé pour le traitement de pièces
PCT/EP2016/080699 WO2017098056A1 (fr) 2015-12-10 2016-12-12 Installation de traitement et procédé pour traiter des pièces

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EP20179791.7A Active EP3730884B1 (fr) 2015-12-10 2016-10-20 Installation de traitement et procédé de traitement des pièces
EP20179796.6A Active EP3730886B1 (fr) 2015-12-10 2016-10-20 Installation de traitement et procédé de traitement des pièces
EP23212266.3A Pending EP4306889A3 (fr) 2015-12-10 2016-10-20 Installation de traitement et procédé de traitement des pièces
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EP20182366.3A Pending EP3745066A3 (fr) 2015-12-10 2016-12-12 Installation de traitement et procédé de traitement de pièces
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EP20179796.6A Active EP3730886B1 (fr) 2015-12-10 2016-10-20 Installation de traitement et procédé de traitement des pièces
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EP4306889A2 (fr) 2024-01-17
FI3730885T3 (fi) 2023-12-01
EP3730884B1 (fr) 2023-09-27
FI3730884T3 (en) 2023-12-14
HUE055544T2 (hu) 2021-12-28
PT3730885T (pt) 2023-11-20
US20180356154A1 (en) 2018-12-13
PT3730886T (pt) 2024-01-16
CN108369065A (zh) 2018-08-03
CN117804187A (zh) 2024-04-02
CN116809351A (zh) 2023-09-29
EP3730886B1 (fr) 2023-11-29
HUE064310T2 (hu) 2024-03-28
EP3387354A1 (fr) 2018-10-17
EP3387355B1 (fr) 2021-08-25
EP3745066A3 (fr) 2021-02-24
ES2884305T3 (es) 2021-12-10
CN117804186A (zh) 2024-04-02
EP3730885B1 (fr) 2023-09-27
FI3730886T3 (fi) 2024-02-14
PL3730884T3 (pl) 2024-04-08
WO2017097483A1 (fr) 2017-06-15
EP3730885A1 (fr) 2020-10-28
PL3730886T3 (pl) 2024-04-22
EP3730886A1 (fr) 2020-10-28
PT3730884T (pt) 2023-11-27
KR20180091880A (ko) 2018-08-16
EP3730884A1 (fr) 2020-10-28
PL3730885T3 (pl) 2024-02-26
DE102015224916A1 (de) 2017-06-14
WO2017098056A1 (fr) 2017-06-15
HUE064175T2 (hu) 2024-02-28
JP2019505754A (ja) 2019-02-28
EP4306889A3 (fr) 2024-04-17
ES2966617T3 (es) 2024-04-23
CN117824325A (zh) 2024-04-05
JP6959233B2 (ja) 2021-11-02
ES2972104T3 (es) 2024-06-11
PL3387354T3 (pl) 2022-03-21
EP3387355A1 (fr) 2018-10-17
EP3387354B1 (fr) 2021-07-07
CN108369066A (zh) 2018-08-03
HUE065167T2 (hu) 2024-05-28
PT3387354T (pt) 2021-07-30
ES2965861T3 (es) 2024-04-17

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