EP3332201A1 - Installation de traitement de pièces et procédé permettant de faire fonctionner une installation de traitement de pièces - Google Patents

Installation de traitement de pièces et procédé permettant de faire fonctionner une installation de traitement de pièces

Info

Publication number
EP3332201A1
EP3332201A1 EP16784818.3A EP16784818A EP3332201A1 EP 3332201 A1 EP3332201 A1 EP 3332201A1 EP 16784818 A EP16784818 A EP 16784818A EP 3332201 A1 EP3332201 A1 EP 3332201A1
Authority
EP
European Patent Office
Prior art keywords
process chamber
air
control
workpieces
chamber
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.)
Granted
Application number
EP16784818.3A
Other languages
German (de)
English (en)
Other versions
EP3332201B1 (fr
Inventor
Enrico HERM
Erhard Rieder
Christian Eichhorn
Oliver Iglauer
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
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Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Priority to EP19210931.2A priority Critical patent/EP3628953A1/fr
Publication of EP3332201A1 publication Critical patent/EP3332201A1/fr
Application granted granted Critical
Publication of EP3332201B1 publication Critical patent/EP3332201B1/fr
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Links

Classifications

    • 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
    • F26B23/022—Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into 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
    • 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
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10—Temperature; Pressure
    • 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
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
    • 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
    • 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 workpiece processing system, in particular for
  • Drying and / or curing of coated and / or coated and / or glued workpieces and a method for operating a workpiece processing system, in particular for drying and / or hardening of lacquered and / or glued workpieces.
  • the invention relates to the field of continuous dryers, through-flow systems, chamber dryers and chamber hardening systems in which painted and / or glued bodies or body parts can be dried and / or cured.
  • a drying and / or curing plant of this type is known, for example, from WO 2010/122121 A2.
  • This conventional drying and / or curing plant has a process chamber with at least one zone for receiving workpieces to be machined, which is connected to a fresh air line for introducing fresh air into the process chamber and an exhaust air line for discharging exhaust air from the process chamber ,
  • a fresh air and / or exhaust air quantity control for controlling the fresh air quantity to be introduced into the process chamber and / or the exhaust air quantity to be led out of the process chamber is also provided.
  • the fresh air and / or exhaust air quantity control is preferably carried out as a function of a number of workpieces currently supplied to the process chamber.
  • the drying and / or curing plant disclosed in WO 2010/122121 A2 also has a thermal afterburning device (TNV), which is supplied with exhaust air from the process chamber for the purpose of thermal exhaust air purification and their output clean air is fed to several recirculation or Frischluftrekuperatoren to the to heat the process chamber to be introduced circulating air or fresh air.
  • TSV thermal afterburning device
  • Combustion temperature is not adjusted to a fixed, maximum value, but in Dependent on a carbon monoxide content is regulated in the output of the post-combustion system clean air. Due to the so adjusting, on average lower combustion chamber temperatures to save energy and the materials used there are spared.
  • DE 10 2008 034 746 B4 discloses a device for drying painted vehicle bodies with a thermal post-combustion plant, in which the pollutant concentration of organic solvents in the dryer is continuously measured. With increasing pollutant concentration on the one hand, the fresh air supply is increased in the process chamber and the Abluftaustechnisch lowered from the process chamber and the other hand, the combustion chamber temperature is kept constant by reducing the fuel supply to the combustion chamber of the post-combustion system.
  • DE 10 2012 023 457 A1 describes a method and a device for tempering, in particular for drying articles. All control and regulation processes of the dryer are coordinated by a control unit through which valves, a process air blower, a fresh air blower and a burner are controlled. However, a combined control of process air quantity and heating power is not provided here.
  • DE 20 2009 013 054 U1 discloses a system for controlling the cabin interior temperature in a drying and / or painting booth for refinishing vehicles and vehicle parts. A temperature sensor contactlessly detects the temperature on the surface of the object to be heated and / or dried, and a control device controls the blower and the heating device as a function of the detected surface temperature of the object to be heated and / or dried. A combined control of process air quantity and heating power is not provided here either.
  • the invention has for its object to provide an improved workpiece machining system and an improved method for operating a workpiece machining system with the lowest possible energy consumption. This object is achieved by the teaching of the independent claims. Advantageous embodiments of the invention are the subject of the dependent claims.
  • the workpiece machining system has a process chamber for receiving workpieces to be machined, which is connected to a process air line for introducing and / or discharging process air into and out of the process chamber; a heating device for heating a process air to be introduced into the process chamber; and a control device for controlling a process air quantity introduced into the process chamber and / or discharged from the process chamber and for controlling a heating power of the heating device.
  • the control device is designed such that it adjusts, controls and / or regulates the process air quantity and the heating power as a function of one another and / or with respect to one another.
  • the combination of the controls i.e., adjustments, controls, and / or controls
  • the combination of the two controls synergy effects can result, which can reduce the metrological effort for the plant control and thus the cost.
  • the invention is based in particular on the following considerations.
  • the aim is a needs-based and thus energy-saving operation of the workpiece machining system.
  • it is necessary to regulate the volume flow of the process air in the process chamber and the heat output of the connected heating device.
  • Such an improved control is possible because, for example, with a reduced number of workpieces in the process chamber of hydrogen and / or carbon, in particular the entry of organic solvents and / or other hydrocarbon compounds and / or other volatile, combustible, ie oxidizable substances reduced in the plant. Accordingly, the requisite fresh air and exhaust air quantities into and out of the process chamber are also reduced for a constant, process-capable process chamber atmosphere.
  • the specific pollutant loading of the exhaust air which is typically given in the unit mass per volume (eg g / m 3 ), can thereby be kept substantially constant in the process chamber according to the smaller number of workpieces.
  • the increase in residence time of the exhaust air in the heating device associated with the lower exhaust air volume flow - with a smaller number of workpieces - brings about improved burnout (carbon monoxide content in the exhaust gas) and thus also improved emission values. Due to this effect, it is possible to reduce not only the fresh air and / or exhaust air volume flows with a smaller number of workpieces, but also the heating power of the heater, while still maintaining the prescribed emission levels. A reduction of the heating power of the heater leads directly to an energy saving.
  • Lowering the heating power of the heater can also extend the life of the workpiece processing equipment.
  • a pure exhaust air volume flow reduction due to structural reasons and / or due to the process, can bring about very high preheating temperatures in the preheating and / or heating zone of the heating device.
  • a reduced heating power of the heater can prevent possible damage in this case, for example by thermal overload at the end of the preheating of the heater, especially in the case of maximum preheating.
  • heating power control By integrating the heating power control with the process air quantity control, it is optionally possible to dispense with an additional, usually expensive measuring technique for detecting the pollutant content in the exhaust air or clean air emitted by the heating device.
  • process air in this context should include all types of air streams that can be introduced into the process chamber and / or discharged from the process chamber. These include, in particular, a fresh air to be introduced into the process chamber, an exhaust air to be led out of the process chamber, and a circulating air to be led out of the process chamber and introduced again into the process chamber.
  • air is intended in this context to include any type of gaseous fluid. These include in particular (ambient) air in the true sense and gases, each with and without impurities or pollutants.
  • the control device is intended to control the amount of process air and the heat output as a function of each other or in relation to each other.
  • a dependent control is to be understood as meaning, in particular, controls in which a functional connection exists between both parameters process air quantity and heating capacity is present.
  • a referring control is to be understood as meaning, in particular, controls in which various dependencies, laws or special rules apply in different value ranges of the parameters.
  • a tabular association exists between the values of the two parameters, whereby this assignment can preferably be determined empirically.
  • the control device can be configured to adjust the heating power of the heater to the process air quantity or the process air quantity control or to adjust the process air quantity to the heating power or the heating power control.
  • This embodiment comprises in particular several different operating modes.
  • the process air quantity control (master) of the heating power control (slave) may be superior, so that a change in the process air flow would automatically result in a change in the heating power of the heater.
  • the heat output control (master) of the process air quantity control (slave) may be superior, so that a change in the heating power would automatically result in a change in the process air amount in or out of the process chamber.
  • the master / slave ratio only in dependence on, for example, the production data or parameters of the
  • Workpiece machining system is determined.
  • Such a configuration or mode of operation of the control device can advantageously contribute to maintaining desired or prescribed emission limits of the system.
  • the allocation of heating power and process air quantity in this integrated control can not be basically proportional to each other.
  • it can also be antiproportional if, for example, with a reduced number of workpieces, the heating power has to be increased within a certain range in order to still be able to provide sufficient clean gas enthalpy for process heating when the process air flow is reduced.
  • the process air line (at least) a fresh air line for introducing fresh air into the process chamber, (at least) an exhaust duct for discharging exhaust air from the process chamber and / or (at least) a recirculation line for discharging and re-introducing of exhaust air from or into the process chamber.
  • the control device is then configured such that it controls the amount of fresh air, the amount of exhaust air and / or the amount of recirculated air.
  • the heating device may have a combustion chamber.
  • the control device is then designed such that it controls a combustion chamber temperature of the combustion chamber.
  • a change in the combustion chamber temperature can be effected, for example, by a change in the fuel gas supply.
  • the heating device may have a thermal afterburning device (TNV) which is connected to an exhaust air line connected to the process chamber for supplying exhaust air from the process chamber into the afterburning device.
  • TSV thermal afterburning device
  • the thermal afterburning device is preferably designed to carry out a thermal oxidation, preferably a regenerative or recuperative thermal oxidation of the combustible pollutants in the exhaust air flow out of the process chamber.
  • the heating device may (at least) comprise a recirculating air recuperator and / or (at least) a fresh air recuperator to which a clean gas resulting from combustion is supplied.
  • the control device is preferably designed such that it (in determining the
  • the control device is preferably designed such that it (in the determination of the heating power control as master) controls the heating power of the heating device as a function of at least one parameter which is selected from:
  • the heating power can be adjusted without detecting an additional parameter relating to a pollutant concentration of the process air (clean air) introduced into the process chamber and / or the process air (exhaust air) discharged from the process chamber.
  • This adaptation preferably takes place by means of an empirically or theoretically determined control algorithm. Ie. for adjusting the heating power is no additional measuring system required, but the control device can fall back on their already existing data, parameters, measured variables, etc.
  • workpieces to be processed are accommodated in a process chamber, wherein the process chamber is connected to a process air line for introducing and / or discharging process air into and out of the process chamber; a process air to be introduced into the process chamber is heated by means of a heating device; and a process air quantity introduced into the process chamber and / or discharged from the process chamber and a heating power of the heating device are adjusted, controlled and / or regulated as a function of one another or with respect to one another.
  • the present invention is preferably used in drying and / or curing plants for drying and / or curing of coated and / or coated and / or glued workpieces.
  • the workpieces are, for example, vehicle bodies or vehicle body parts.
  • Fig. 1 shows the structure of a workpiece machining system according to a preferred
  • Fig. 2 shows the structure of a workpiece machining system according to various
  • FIG. 4 shows the construction of a workpiece machining system according to additional modifications of the embodiment of FIG. 3.
  • FIG. 1 shows a workpiece processing system 10 according to an embodiment of the invention, which is configured by way of example as a drying and / or curing system.
  • the structure of this drying and / or curing system 10 basically corresponds to that of WO 2010/122121 A2. With regard to the structure of the plant, the functioning of the individual
  • the drying and / or curing system 10 may be part of a paint shop.
  • the painting can have one or more painting zones 12, in which workpieces 14 are painted.
  • the drying and / or curing system 10 can be attached to these painting zones 12 and in particular downstream in a conveying direction 16.
  • the drying and / or curing plant 10 is generally still downstream of a cooling zone, not shown, in which the workpieces 14 are cooled for further process steps or steps.
  • the drying and / or curing system 10 is suitable for drying and / or curing of painted and / or glued components, in particular of bodies, body parts or other assemblies (parts) of a land vehicle, watercraft or aircraft.
  • the workpiece 14 shown in FIG. 1 is designed as a painted body for a vehicle or aircraft.
  • the workpiece 14 is in this case on a suitable support
  • (Skid) 15 attached, which is movable in a conveying direction 16 to convey the workpiece 14 from the painting zones 12 in and through the drying and / or curing plant 10.
  • the transport of the workpiece 14 can be carried out continuously or discontinuously.
  • the workpiece machining system 10 according to the invention is also suitable for others
  • the drying and / or curing system 10 has a process chamber 18 with several zones 20-24.
  • a first zone 20 is designed as a lock zone in the form of an inlet lock.
  • a second zone 21 is designed as a first heating zone and a third zone 22 is designed as a second heating zone.
  • a fourth zone 23 is designed as a holding zone and a last zone 24 is designed as a lock zone in the form of an outlet lock.
  • the lock zones 20 and 24 are preferably designed such that, in particular, a process air inside the process chamber 18 does not escape from it or escape is at least largely avoided.
  • the first heating zone 21 and the second heating zone 22 allow heating of the workpiece 14 in (in this embodiment, two) stages. At full capacity, one or more workpieces 14 may be heated in zones 21, 22, with the workpiece 14, after being heated in zone 21, being conveyed to zone 22 to allow further heating. In the holding zone 23, one or more workpieces 14 may remain for a certain period of time in order to carry out drying and curing of the workpiece 14 (possibly with the aid of electromagnetic radiation).
  • Solvents in the form of aliphatic and / or aromatic hydrocarbons, fluorohydrocarbons, fluoro-chloro-hydrocarbons, esters, ketones, glycol ethers, alcohols, water and the like are then enriched, depending on whether they are low or medium - or high boilers - acts mainly in the heating zones 21, 22 or the holding zone 23 in the air of the process chamber 18. However, under which conditions the solvents escape in the drying and / or curing plant 10, depends on the particular solvent or the solvent component. Low boilers escape at low ( ⁇ 100 ° C), medium boilers at medium (100 ° C to 150 ° C) and high boilers at high (> 150 ° C) temperatures. For the drying and / or curing process in the holding zone 23 may be given a certain amount of time, after which the workpiece 14 is transported via the lock zone 24 from the drying and / or curing system 10. The glued and / or lacquered
  • Workpiece 14 is then dried and / or cured.
  • a certain exchange of the process air provided in the process chamber 18 is required.
  • a certain amount of air can be removed from the drying and / or curing plant 10 (exhaust air), which is replaced by fresh air.
  • This process air exchange is necessary because the air in the process chamber 18 accumulates with solvents which during the drying and / or curing process from a paint film or adhesive in the interior (work space) of the process chamber 18 of the drying and / or curing plant 10, and this enrichment must be counteracted.
  • the solvent-enriched process air can be gradually, in particular continuously, replaced to ensure that the process air can continue to absorb solvent.
  • a certain threshold value can be predetermined, which is not or only slightly, especially temporally and / or spatially limited, exceeded for maintaining a proper drying and / or curing process.
  • This process air exchange is carried out here targeted, with an exchange via the sluice zones 20, 24 is prevented as much as possible, otherwise undesirable warm air from the process chamber 18 enters the environment or - if the fresh air mainly via the sluice zones 20, 24 in the process chamber 18 is pulled - too much cold outside air enters the process chamber 18.
  • the drying and / or curing system 10 also has a heating device 26-37.
  • This heating device has a thermal afterburning device (TNV) 26, at least one, preferably a plurality of (here: three) recirculating air recuperators 28, 30, 32 and, as a rule, a (in rare cases none) fresh air recuperator 34.
  • TSV thermal afterburning device
  • the thermal afterburning device 26 is preferably designed as a post-combustion device for the regenerative or recuperative thermal oxidation of combustible pollutants in an exhaust air from the process chamber 18 and preferably has a gas burner 36.
  • the hot clean air generated by the gas burner 36 in a combustion chamber 37 is passed through the recuperators 28, 30, 32, 34 and then released to the atmosphere, as indicated by the arrow 38. That the hot exhaust gases (clean air) of the TNV 26 are used in the recuperators 28, 30, 32, 34 as an energy source for heating the circulating air or fresh air.
  • Recuperators 28, 30, 32, 34 are each provided with throttle valves to a certain extent the to use the thermal energy generated by the gas burner 36 in the respective recuperator and forward the remaining part to the next recuperator.
  • the recuperators 28, 30, 32, 34 furthermore each have a heat exchanger 29, 31, 33, 35.
  • the heat exchanger 29 of the first recirculating air recuperator 28 is assigned a suction side and an outflow side of a circulating air line 40 connected to the first heating zone 21.
  • the heat exchanger 29 is arranged together with a fan in the circulating air line 40.
  • the throttle valves of the first Umbuchrekuperators 28 is a more or less strong heating of the flowing through the heat exchanger 29 and returned to the first heating zone 21 circulating air to 10 in operation of the system a certain
  • the second heating zone 22 of the process chamber 18 is connected via a recirculation line 42 to the second recirculating air recuperator 30, which has a heat exchanger 31 arranged in the circulating air line 42, and the holding zone 23 of the process chamber 18 via a recirculation line 44 to the third recirculating air recuperator 32nd connected, which has a arranged in the recirculation line 44 heat exchanger 33.
  • the process air can be heated in the zones 21, 22, 23 and kept their temperature at a desired level.
  • at least one exhaust duct 46 is provided. According to FIG.
  • a suction side of this exhaust air line 46 is arranged in the holding zone 23 of the process chamber 18, and an outflow side of the exhaust air line 46 opens into the combustion chamber 37 of the TNV 26.
  • the oxygen required for burning a fuel gas can thus be removed via the exhaust air line 46 flowing exhaust air are obtained from the holding zone 23, wherein this exhaust air is heated.
  • the exhaust air from the holding zone 23 is thermally cleaned, so that in the direction of arrow 38 clean air is released to the atmosphere.
  • a heat exchanger 27 is arranged in the exhaust duct 46, so that the exhaust air flowing into the combustion chamber 37 on the outflow side can be preheated.
  • a throttle valve 47 and a fan 48 which is designed as a particular (frequency) controlled fan arranged.
  • the drying and / or curing system 10 has a fresh air line 50 with a fresh air inlet 52, can be sucked through the fresh air, on. From the fresh air entrance 52, the fresh air via the fresh air line 50 is first passed through the Frischluftrekuperator 34, wherein the heat exchanger 35 is disposed in the fresh air line 50.
  • the fresh air line 50 has a first outlet point at the lock zone 20 of the process chamber 18 and a second outlet point at the lock zone 24.
  • throttle valves are arranged in front of these outlet points in order to regulate the portion of the fresh air quantity which is supplied to the outlet points via the fresh air line 50.
  • adjustable gratings or nozzles are provided at individual or all outlet points in order to be able to make an adjustment of the volume flows passed through.
  • a particular (frequency) controlled fan 53 is arranged in the fresh air line 50.
  • the fan 53 is arranged in the flow direction in front of the heat exchanger 35 of the recuperator 34 in the fresh air line 50.
  • the drying and / or curing system 10 further comprises a control device 55.
  • This control device 55 is in particular configured such that on the one hand it controls the amount of fresh air introduced via the fresh air line 50 into the lock zones 20, 24 of the process chamber 18 and / or the exhaust air quantity discharged via the exhaust line 46 from the holding zone 23 of the process chamber 18 and, on the other hand, controls the heating power of the TNV 26 controls.
  • the control device 55 can also control the circulating air quantities conducted via the circulating air lines 40, 42, 44.
  • control device 55 with a control (eg an actuator) 56 of the fan 48 in the exhaust duct 46, with a controller (eg an actuator) 57 of the fan 53 in the fresh air line 50, and with a control of the gas burner 36 in the Combustion chamber 37 of the TNV 26 connected.
  • control device 55 may also be connected to actuators of the throttles or throttle valves in the exhaust air line 46 or the fresh air line 50 and / or throttle / clean gas valves for controlling the clean gas enthalpy at the Um Kunststoffrekuperatoren 28, 30, 32.
  • an arrangement of the suction side can also be arranged in one or more heating zones 21, 22 or in the transition between two successive zones 21, 22, 23 and / or 24.
  • the suction side of an exhaust duct 46 is in the range of the maximum concentration of combustible Pollutants of the process air in the process chamber 18 or in a subsequent to a portion or region of maximum increase in concentration of combustible pollutants in the process air region of the process chamber 18 is arranged.
  • the suction side of an exhaust air duct 46 is arranged after the heating zone 21.
  • a controllable and / or controllable throttle or shut-off valve 47 and / or a separate, controllable and / or controllable fan 48 for controlling a flow through the respective exhaust duct 46th be provided, which are advantageously connected to the control device 55.
  • the control device 55 can take into account one or more parameters for controlling the amount of fresh air introduced into the zones 20, 24 and the amount of exhaust air discharged from the zone 23. Corresponding parameters are advantageously stored in the control software, the parameters depending on the operation of the system 10 are variable.
  • the control device 55 is connected for this purpose with a workpiece detection device 60, which can detect the number of transported into the process chamber 18 of the drying and / or curing unit 10 workpieces 14.
  • a workpiece detection device 60 is provided, which is arranged in the conveying direction 16 between the lock zone 20 of the process chamber 18 of the drying and / or curing system 10 and the painting zone 12.
  • at least one, preferably a plurality of workpiece detection device (s) may be provided which are connected downstream of the process chamber 18.
  • workpiece detection devices 60 are preferably sensors or transmitting / receiving units in question based on electromagnetic waves, induction and / or Weight measurement work.
  • the workpiece detection device (s) 60 can be designed, for example, as a sensor (s) which, when passing through the carrier 15 or the workpiece 14, at least one clock signal or another measured variable concerning the carrier 15 or the workpiece 14 can transmit to the controller 55 / can or can transmit / submit. From the received clock signals, the control device 55 can then determine the instantaneous utilization level of the drying and / or curing system 10. Alternatively or additionally, the position of the workpiece in the dryer can be determined from the clock signals and / or another measured variable detected by the workpiece detection device 60 and relating to and / or characterizing the carrier 15 or the workpiece 14.
  • the fresh air and / or exhaust air quantity can be made dependent, in particular controlled, on this position of the carrier 15 or of the workpiece 14, on the progress of the process (eg position in heating zone or holding zone) and / or the measured variable / or regulated.
  • the workpiece detection device 60 can also be designed as a reading device, RFID reader, barcode reader or the like. In such an embodiment, the workpiece detecting device 60 can detect, for example, a workpiece number of the workpiece 14 or the workpiece 14 in cooperation ⁇ hang-standing information.
  • process parameters of the system 10 for example a size of the workpiece 14, a material of the workpiece 14 and the like.
  • Other process parameters which can be considered as an alternative or in addition, have a volume flow, a mass flow, a temperature, a quality (eg Homo ⁇ geneity of the density distribution, volatility, etc.) and / or an amount of the processing medium and / or -fluids (eg Lacquer, coating powder, adhesive or the like).
  • the controller 55 for example, from a higher-level system control of
  • a further energy saving is done by the controller 55 via an adjustment of the heating power of the heater 26-37, in particular the burner power of the TNV 26 to the fresh air and / or exhaust air quantity control.
  • This adjustment of the heating power can, optionally without additional measuring systems (eg for detecting the pollutant concentration in the clean air, for example, downstream of the TNV 26 in the clean air or upstream of the TNV 26 in the exhaust air), based on the production data and parameters supplied by the system 10 that are already being used by the controller 55 for fresh air and / or exhaust air quantity control are executed.
  • the control device 55 enables a needs-based and thus energy-saving operation of the drying and / or curing system 10.
  • the proposed here, improved system control is possible because, for example, with a reduced number of workpieces 14 in the process chamber 18, the water and carbon input, in particular the solvent and / or hydrocarbon entry into the system 10 is reduced. Accordingly, the required volume flows of the fresh air to be introduced into the process chamber 18 and the exhaust air to be led out of the process chamber 18 are also reduced for a constant, process-capable process chamber atmosphere.
  • the specific pollutant loading of the exhaust air which is typically given in units of mass per volume (eg g / m 3 ), remains essentially constant due to the smaller number of workpieces in the process chamber 18.
  • this merge can be such that the fresh air and / or exhaust air quantity control is superior to the combustion chamber temperature control.
  • An increase or reduction of the exhaust air volume flow through the exhaust air line 46 would then automatically increase or decrease the combustion chamber temperature result.
  • the control algorithm on which it is based can be adapted, for example, by reference measurements within the scope of the emission value settings on the TNV 26 for the present system 10.
  • control device 55 may control the amount of fresh air and / or the amount of exhaust air into and out of the process chamber 18 of the drying and / or curing plant 10 preferably in dependence on one or more of the following process parameters of the plant 10:
  • a control architecture may be provided, in which the control of the combustion chamber temperature of the TNV 26 in dependence on certain process parameters of the system 10 (master) with automatic adjustment of the fresh air and / or the exhaust air volume flow (slave) can be performed.
  • control device 55 may also preferably control the combustion chamber temperature of the TNV 26 as a function of one or more of the following process parameters of the system 10:
  • Combustion temperature control conceivable. That is, the respective master / slave ratio of these two controls by the controller 55 is only in operation of the drying and / or Curing plant 10 determined depending on the current production data or parameters.
  • the controller 55 may optionally also use at least one state parameter (e.g., humidity, temperature, pollutant content) of the process air in the process chamber 18 as another process parameter.
  • a corresponding process air sensor 62 may optionally be mounted in / on the process chamber 18. While this process air sensor 62 is positioned in / on the lock zone 20 in FIG. 2, one or more process air sensors may alternatively or additionally also be provided in / at one or more of the other zones 21-24 of the process chamber 18.
  • the process air sensor (s) 62 may be used, for example, to determine the humidity as a moisture meter or hygrometer, to determine the temperature as a thermometer, infrared sensor, thermoelectric element or the like and / or to determine a pollutant content as a flame ionization detector (FID), pellistor, electrochemical cell , optical gas sensors, galvanic concentration cell or the like.
  • FID flame ionization detector
  • pellistor electrochemical cell
  • optical gas sensors galvanic concentration cell or the like.
  • control device 55 can optionally also use as a further process parameter a state parameter (for example temperature, pollutant content) of the exhaust air discharged through the exhaust air line 46 out of the process chamber 18.
  • a state parameter for example temperature, pollutant content
  • the exhaust air sensor 64 may be mounted in / on the exhaust air duct 46.
  • the exhaust air sensor 64 may also be in the process chamber
  • the exhaust air sensor 46 is in particular intended to be provided and / or designed to determine at least one quality, property and / or a state parameter, in particular a humidity, temperature and / or pollutant content of the exhaust air or the process air to be extracted.
  • the exhaust air sensor (s) 64 may be used, for example, for determining the moisture as a moisture meter or hygrometer, for Determining the temperature as a thermometer, infrared sensor, thermoelectric element or the like and / or to determine a pollutant content as a flame ionization detector (FID), pellistor, electrochemical cell, optical gas sensors, galvanic concentration cell or the like.
  • FID flame ionization detector
  • pellistor electrochemical cell
  • optical gas sensors galvanic concentration cell or the like.
  • the controller 55 may optionally also use as a further process parameter a state parameter (e.g., humidity, temperature, pollutant content) of the clean air 38 output from the heater 26-37.
  • a state parameter e.g., humidity, temperature, pollutant content
  • a corresponding clean air sensor 66 can optionally be provided downstream of the heating device.
  • a clean air sensor between the TNV 26 and the first Umluftrekuperator 28 may be provided.
  • the clean air sensor 66 can be used, for example, for determining the moisture as a moisture meter or hygrometer, for determining the temperature as a thermometer, infrared sensor, thermoelectric element or the like and / or for determining a pollutant content as a flame ionization detector (FID), pellistor, electrochemical cell, optical gas sensors, galvanic Concentration cell or the like.
  • FID flame ionization detector
  • pellistor electrochemical cell
  • optical gas sensors galvanic Concentration cell or the like.
  • a suction side of the further exhaust air line 68 is arranged in the holding zone 23 of the process chamber 18, as in the case of the exhaust air line 46.
  • This further exhaust pipe 68 is merged with the fresh air line 50 to mix the fresh air from the fresh air inlet 52 with the exhaust air from the further exhaust duct 68.
  • This mixture of fresh air and exhaust air is fed via the fresh air line 50 to the sluice zones 20, 24 of the process chamber 18.
  • In the further exhaust duct 68 are preferably an adjustable in its throughput, in particular frequency-controlled fan and a throttle valve are arranged.
  • the control device 55 preferably takes into account, in addition to the two criteria energy saving and condensate avoidance, a third criterion, namely the limitation of the solvent concentration to below 25% of the lower explosion limit (LEL).
  • a third criterion namely the limitation of the solvent concentration to below 25% of the lower explosion limit (LEL).
  • LEL lower explosion limit
  • a certain amount of exhaust air is discharged from the holding zone 23.
  • the over the Exhaust line 46 from the process chamber 18 remote exhaust air is subjected to a thermal exhaust air purification in the combustion chamber 37 of the TNV 26, while the over the further exhaust duct 68 out of the holding zone 23 and introduced together with the fresh air into the lock zones 20, 24 part of the exhaust air in relation on the entire drying and / or
  • Hardening system 10 serves as a circulating air and can distribute the enriched with the solvent process air through the process chamber 18. As a result, a high concentration of solvents in the process air of the holding zone 23 is reduced, wherein the thermal energy is maintained and thus the energy requirement can be further reduced.
  • the part of the exhaust air quantity routed via the further exhaust air line 68 can replace part of the supplied fresh air quantity. In this case, the reaching into the lock zones 20, 24 air mixture from the exhaust air and the fresh air and relatively low in solvent, when this comes into contact with the lock air in the lock zones 20, 24, which is why condensation in these zones 20, 24 can be counteracted.
  • the exhaust air serving as circulating air can also be taken from another zone of the process chamber 18, for example the first heating zone 21 and / or the second heating zone 22.
  • a further exhaust air line 70, 72 can serve as circulating air exhaust air from the holding zone 23 of the process chamber 18 is discharged and preferably directly, i. without mixing with fresh air, the lock zones 20, 24 are supplied.
  • the two further exhaust ducts 70, 72 may optionally have separate suction points or a common suction point in the holding zone 23.
  • exhaust air serving as circulating air can be removed from the first heating zone 21 of the process chamber 18 and fed to the lock zone 20. As a result, a certain amount of exhaust air from the first heating zone 21 can be conducted into the lock zone 20.
  • Fans, throttles or throttle valves, filter devices and / or exhaust air sensors 64 may be provided.
  • Combinations of Fig. 2 may be provided.
  • an intermediate lock 25 can optionally be provided between the first heating zone 21 and the second heating zone 22.
  • one or more of the circulating air lines 40, 42, 44 supply fresh air.
  • a further fresh air line 76 is provided, which branches off, for example, upstream and / or downstream of the heat exchanger 35 of the fresh air recuperator 34 and, for example, downstream of the heat exchanger 29, 31, 33 of the respective recirculating recuperator 28, 30, 32 in the corresponding recirculation line 40, 42, 44 opens.
  • Further variants of the drying and / or curing system 10 have a flow measuring device 78 on the further fresh air line 76 and / or a flow measuring device 79 on the fresh air line 50.
  • FIG. 4 various additional modifications of the drying and / or curing equipment 10 of FIG. 1 will be discussed, these being shown as complementary modifications to the embodiment of FIG. 3. However, these additional modifications may also be provided individually or in any desired combination and / or in any combination with one or more combinations of FIG. 2.
  • at least one further exhaust air line 46 is provided, whose
  • a throttle valve 47, a fan 48 and / or an exhaust air sensor 64 may be provided or arranged, which advantageously characterize, determine and / or determine a flow through the respective exhaust duct 46.
  • the throttle flap 47 and / or the fan 48 are advantageously connected to an output line of the control device 55, the exhaust air sensor 64 in particular with an input line.
  • type and The task of the exhaust air sensor 64 is referred to the description of the embodiment of FIG. 2 in this passage.
  • a clean-air sensor 66 is provided in a path or a line of the clean air, as has already been described in the comments on FIG. 2, to which reference is made at this point.
  • a control flap for controlling a fuel or a fuel-air mixture supply is shown on the heater 26-37, in particular the TNV 26, of FIG. 4, which with an output line the control device 55 is connected.
  • the heating device 26-37, in particular the TNV 26, optionally also with respect to an ignition device, not shown, with an output and / or a combustion chamber monitoring sensor also not shown connected to an input of the controller 55, whereby the control conveniently initiate an ignition process and / or can monitor the ignition and / or the combustion process.
  • control device 55 additionally or alternatively to the data of the workpiece detection device 60 process and / or product data 12A from the upstream painting and / or coating and / or gluing process, in particular from the coating, coating and / or adhesive, preferably from the painting cells 12, are supplied and / or can be queried by this.
  • process and / or product data 12A on working material used eg paint, coating material, adhesive and / or auxiliary agents, in particular with regard to composition, physical / chemical properties, etc.
  • application properties eg layer thickness
  • workpiece condition eg mass, volume, surface, shape
  • Importance can be supplied for example by a process computer of the upstream painting and / or coating and / or bonding process, for example via a data bus of the controller 55, provided and / or queried from this.
  • process and / or product data 12A are forwarded to the workpiece 14 or the carrier 15 or with the latter, and Preferably, read by means of the workpiece detection device 60 or another reading unit and forwarded to the controller 55 for processing.
  • certain parameter values, intervals and / or groups can be coded into a preferably machine-readable code (eg bar code, QR code), wherein the control device 55 advantageously has a corresponding decoding unit in order to process the process and / or groups thus coded. or evaluate product data 12A for processing.
  • process and / or product data 12A may be coded or uncoded in one
  • Memory element on the workpiece 14 and / or carrier 15 can be stored retrievable, wherein conveniently the workpiece detection device 60 or another reading unit of the work piece processing system 10 reads out the process and / or product data 12A required for the control.
  • a write ⁇ unit may, for example, in or after the Ausschleusezone 24 be provided, which process and / or product data 10A of the workpiece machining in the workpiece machining apparatus 10 in the storage element of the workpiece 14 and / or support 15 stores.
  • the control unit 55 can also forward the process and / or product data 10A to a process control computer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne une installation de séchage et/ou de durcissement (10) servant à sécher et/ou à durcir des pièces peintes et/ou revêtues et/ou collées. L'installation présente une chambre de traitement (18) recevant les pièces à traiter (14) et reliée à une conduite d'air de traitement (40, 42, 44, 46, 50) pour l'introduction d'air de traitement dans la chambre de traitement et/ou pour son évacuation, un dispositif de chauffage (26-37) servant à chauffer l'air de traitement à introduire dans la chambre de traitement (18), et un dispositif de régulation (55) servant à réguler la quantité d'air de traitement introduite dans la chambre de traitement et/ou évacuée de la chambre de traitement et à réguler la puissance de chauffage du dispositif de chauffage. Le dispositif de régulation (55) est conçu de telle manière qu'il ajuste, commande et/ou régule la quantité d'air de traitement et la puissance de chauffage indépendamment l'une de l'autre ou en fonction l'une de l'autre.
EP16784818.3A 2015-10-14 2016-10-12 Installation pour le traitement de pièces et opération d'une installation Active EP3332201B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19210931.2A EP3628953A1 (fr) 2015-10-14 2016-10-12 Installation d'usinage de pièces et procédé de fonctionnement d'une installation d'usinage de pièces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015219898.7A DE102015219898A1 (de) 2015-10-14 2015-10-14 Werkstückbearbeitungsanlage und Verfahren zum Betreiben einer Werkstückbearbeitungsanlage
PCT/EP2016/074420 WO2017064100A1 (fr) 2015-10-14 2016-10-12 Installation de traitement de pièces et procédé permettant de faire fonctionner une installation de traitement de pièces

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EP19210931.2A Division EP3628953A1 (fr) 2015-10-14 2016-10-12 Installation d'usinage de pièces et procédé de fonctionnement d'une installation d'usinage de pièces

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EP3332201A1 true EP3332201A1 (fr) 2018-06-13
EP3332201B1 EP3332201B1 (fr) 2019-12-18

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EP16784818.3A Active EP3332201B1 (fr) 2015-10-14 2016-10-12 Installation pour le traitement de pièces et opération d'une installation
EP19210931.2A Pending EP3628953A1 (fr) 2015-10-14 2016-10-12 Installation d'usinage de pièces et procédé de fonctionnement d'une installation d'usinage de pièces

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CN (2) CN108351170B (fr)
DE (1) DE102015219898A1 (fr)
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DE102020212808A1 (de) * 2020-10-09 2022-04-14 Dürr Systems Ag Verfahren zum Betreiben einer Behandlungsanlage und Behandlungsanlage
CN112197570B (zh) * 2020-10-29 2023-08-25 张勇 复合型热泵烘干系统
DE102022113075A1 (de) * 2022-05-24 2023-11-30 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken und/oder Materialbahnen
DE102022113076A1 (de) * 2022-05-24 2023-11-30 Dürr Systems Ag Behandlungsanlage zum Behandeln von Werkstücken und ein Verfahren zum Behandeln von Werkstücken
DE102022113079A1 (de) 2022-05-24 2023-11-30 Dürr Systems Ag Umbausatz für eine Behandlungsanlage und Verfahren zum Umbau einer Behandlungsanlage
DE102022113067A1 (de) * 2022-05-24 2023-11-30 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
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DE102022131532A1 (de) 2022-11-29 2024-05-29 Bayerische Motoren Werke Aktiengesellschaft Behandlungsanlage zum Behandeln von Werkstücken und Verfahren zum Behandeln von Werkstücken

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WO2017064100A1 (fr) 2017-04-20
DE102015219898A1 (de) 2017-04-20
CN108351170B (zh) 2020-06-16
EP3332201B1 (fr) 2019-12-18
EP3628953A1 (fr) 2020-04-01
CN108351170A (zh) 2018-07-31
CN111795567A (zh) 2020-10-20

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