EP4533010A1 - Système de recirculation, installation de traitement et procédé de fonctionnement d'un système de recirculation - Google Patents

Système de recirculation, installation de traitement et procédé de fonctionnement d'un système de recirculation

Info

Publication number
EP4533010A1
EP4533010A1 EP23729936.7A EP23729936A EP4533010A1 EP 4533010 A1 EP4533010 A1 EP 4533010A1 EP 23729936 A EP23729936 A EP 23729936A EP 4533010 A1 EP4533010 A1 EP 4533010A1
Authority
EP
European Patent Office
Prior art keywords
air
global
air flow
recirculation
local
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
EP23729936.7A
Other languages
German (de)
English (en)
Inventor
Oliver IGLAUER-ANGRIK
Kevin Woll
Heiko Dieter
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 EP4533010A1 publication Critical patent/EP4533010A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
    • F26B21/20—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/25—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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
    • F26B21/20—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/202—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with means for changing the flow pattern, e.g. by reversing gas flow or by moving the materials or objects through subsequent compartments, at least two of which have a different flow direction
    • F26B21/208—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with means for changing the flow pattern, e.g. by reversing gas flow or by moving the materials or objects through subsequent compartments, at least two of which have a different flow direction by air valves, movable baffles or nozzle arrangements
    • 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
    • F26B23/00—Heating arrangements
    • F26B23/04—Heating arrangements using electric heating
    • 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
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/006—Separating volatiles, e.g. recovering solvents from dryer exhaust gases
    • 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
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/007—Dust filtering; Exhaust dust filters
    • 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
    • F26B25/008—Seals, locks, e.g. gas barriers or air curtains, for drying enclosures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
    • 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 goods
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • the clean gas stream passes through a fresh air heat exchanger and then leaves the treatment system at a temperature of, for example, 130 °C via the corresponding roof of the system.
  • the minimum exhaust air volume flow is determined in accordance with the standard on the basis of the lower explosion limit, but in practice it is correspondingly higher so that the energy requirement of the drying system can be covered by the pure gas enthalpy.
  • regenerative thermal oxidation devices can also be used.
  • the outlet temperature of the clean gas from the RTO is approximately 20 K to 40 K above the inlet temperature and therefore significantly lower than with a TAR.
  • the pure gas stream is therefore not suitable for heating the individual treatment room sections or dryer zones, but is generally only used to preheat fresh air. Again, this results in a clean gas volume flow of usually over 100 °C, which is discharged via the roof of the system.
  • the individual dryer sections are supplied with individual burners or electric heaters. In both cases, there is no material return of cleaned exhaust air into the drying process.
  • the invention is based on the idea that in order to reduce the energy loss of the exhaust air flow or clean gas flow discharged via the roof, the exhaust air volume flow withdrawn from the treatment room or drying tunnel is fed to a special device for cleaning and then at least partially returned to the process as cleaned circulating air.
  • the exhaust air purification device can be an electrically operated, flameless RTO.
  • the cross section of the clean gas duct or exhaust air duct can be reduced or, for example, a clean gas duct or exhaust gas duct via the roof can be completely avoided if the global recirculated air is completely recirculated.
  • the treatment room may include a pre-treatment room and/or a post-treatment room.
  • hot water can also be saved in the after-treatment room or the cooling zone.
  • the processing device is or comprises a processing device for processing, in particular for cleaning, the global circulating air flow, wherein the processing device comprises a thermal processing device, in particular a is or comprises a purely electrically operated, preferably flameless, regenerative thermal oxidation device.
  • the RTO has an electrical heating device for processing the global circulating air flow and can also be operated autothermally if the solvent concentration has exceeded a certain limit.
  • the RTO can preferably have a catalytic effect.
  • the thermal processing device is or comprises an electrical heating device, wherein it is preferably provided that thermal processing is carried out exclusively by direct electrical heating, in particular electrical resistance heating, and / or by exothermic conversion of components of the global circulating air flow he follows.
  • the processing device preferably comprises a fan for conveying the global circulating air flow.
  • the processing device is provided and/or designed independently of a removal device for removing exhaust air, in particular spatially separated from an exhaust air line which serves to remove exhaust air from the recirculation system.
  • local recirculated air flows can flow through different and/or adjacent treatment room sections of the treatment room by means of the local recirculated air modules and that global recirculated air can be supplied by means of the global recirculated air duct on or adjacent to one or more local recirculated air modules and/or that By means of the global recirculation air circulation, recirculation air can be removed from one or more other local recirculation air modules as a global recirculation air flow.
  • the global circulating air flow is supplied at the beginning and/or end of the treatment room, in particular into an inlet lock and/or outlet lock.
  • the exhaust air from the treatment room sections is preferably discharged to one of the middle treatment room sections.
  • an air stream passed through the processing device can be heated at least temporarily by means of the processing device to a temperature which causes a chemical conversion of substances contained in the air stream, in particular solvents.
  • the processing device is preferably an RTO, which enables the removal of solvent-containing and/or odorous exhaust air.
  • the global circulating air flow is preferably only heated up before it is fed back into the treatment room.
  • the circulating air system comprises at least one heat exchanger, by means of which thermal energy contained in a derived global circulating air stream or in an exhaust air stream can be transferred to a fresh air stream supplied to the global circulating air stream.
  • a cooled exhaust air stream removed from the heat exchanger can be fed to a fresh air stream and/or a cooled exhaust air stream, which are assigned to an aftertreatment room.
  • the present invention is also based on the object of providing a method which enables reduced exhaust air operation of a recirculation system.
  • a global recirculation air flow is preferably generated by the multiple local recirculation air modules and/or the Treatment room removed, processed and fed again to at least one of the several local recirculation modules and / or the treatment room.
  • the recirculation system preferably also has one or more of the features and/or advantages described in connection with the method.
  • the global circulating air flow is heated to prepare it, in particular directly and/or exclusively by means of electrical resistance heating and/or by exothermic conversion of components of the global circulating air flow.
  • FIG. 1 shows a schematic representation of a first embodiment of a treatment system
  • FIG. 3 shows a schematic representation of a third embodiment of a treatment system
  • FIG. 4 shows a schematic representation of a fourth embodiment of a treatment system
  • FIG. 5 shows a schematic representation of a fifth embodiment of a treatment system
  • FIG. 6 shows a schematic representation of a sixth embodiment of a treatment system
  • 7 shows a schematic representation of a seventh embodiment of a treatment system
  • FIG. 8 shows a schematic representation of an eighth embodiment of a treatment system
  • FIG. 9 shows a schematic representation of a ninth embodiment of a treatment system
  • FIG. 10 shows a schematic representation of a tenth embodiment of a treatment system
  • FIG. 11 shows a schematic representation of an eleventh embodiment of a treatment system
  • Fig. 12 is a schematic representation of a twelfth embodiment of a treatment system.
  • a first embodiment shown in Fig. 1 of a treatment system designated as a whole by 100 is used to treat workpieces (not shown), in particular for drying vehicle bodies.
  • the treatment system 100 is in particular a dryer 102 for drying previously coated vehicle bodies.
  • the treatment room 106 includes several treatment room sections 110.
  • the treatment room sections 110 are assigned to several separate, local recirculation modules 112 of the recirculation system 104.
  • the local circulating air modules 112 each circulate a local circulating air stream 114 in a local circulating air duct 116 through the respectively assigned treatment room section 110.
  • the local circulating air modules 112 preferably include a fan and a preferably electrical heating device for heating the respective local circulating air flow 114.
  • the workpieces to be treated are conveyed through the treatment room 106 and the after-treatment room 108 along a conveying direction 118.
  • the recirculation system 104 further includes a global recirculation air guide 120, which guides a global recirculation air flow 122.
  • a global circulating air flow 124 discharged at one of the middle treatment room sections 110 is fed to a processing device 126 arranged downstream of the treatment room 106 for processing.
  • the processing in the processing device 126 is preferably carried out using RTO, which is preferably electrically operated, flameless RTO.
  • the derived global circulating air flow 130 serves to transfer its thermal energy in a heat exchanger 133 to a supplied fresh air flow 134.
  • the heat exchanger 133 is preferably an air-air heat exchanger such as a tube bundle or plate heat exchanger, in which the dissipated global circulating air flow 130 is cooled down as much as possible when the heat energy is transferred to the supplied fresh air flow 134, that is, for example to 60 ° C, in order to to keep as much heat energy as possible in the treatment system 100.
  • the standard volume flow of the cooled exhaust air flow 136 preferably corresponds to that of the supplied fresh air flow 134, with the fresh air flow 134 being partially sucked in via the locks and partially guided via the heat exchanger 133 (usually 500 Nm 3 /h suction per lock). In particular, this standard volume flow is 2,000 Nm 3 /h.
  • the mixed global circulating air flow 140 is then heated in an additional heating device 142.
  • the global recirculation air flow 120 is preferably a continuous process for processing the local recirculation air flow 114 circulated in the treatment room sections 110 and the local recirculation air modules 112.
  • the supply into the two externally arranged, local circulating air modules 112 takes place for reasons of balance and in favor of optimal flushing of the treatment room 106.
  • a supply to more than two circulating air modules 112 is also conceivable.
  • the standard volume flow of the heated global circulating air flow 144 is preferably 10,000 Nm 3 /h.
  • the preheated fresh air stream 138 guided from the heat exchanger 133 is heated by means of the additional heating device 142 to form a heated fresh air stream 172 such that, after mixing with the returned global circulating air stream 132, this results in the heated global circulating air stream 144, which is the one for the treatment room 106 or the locks 146, 148 has a suitable or favorable temperature.
  • the additional device 142 can be connected to a controller 174 or have one in order to regulate the temperature of the air flow after the additional heating device 142 and/or after the heated fresh air flow 172 has been mixed into the returned global circulating air flow 132.
  • FIG. 11 shows an eleventh embodiment of the treatment system 100, which, like the tenth embodiment, has a bypass recirculation air guide 178 in order to guide the discharged global recirculation air flow 124 past the processing device 126.
  • a constant volume flow can be provided for all load cases, but with reduced system utilization only a partial flow is supplied to the processing device 126, the remaining global recirculated air flow is guided via the bypass recirculated air duct 178.
  • the bypass can be adjusted gradually.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Microbiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Treating Waste Gases (AREA)

Abstract

La présente invention concerne un système de recirculation (104), destiné en particulier à une installation de traitement (100) pour le traitement de pièces, le système de recirculation (104) comprenant les éléments suivants : - une pluralité de modules de recirculation locaux (112), au moyen desquels des flux de recirculation locaux (114) peuvent être fournis à une chambre de traitement (106), guidés à travers celle-ci et évacués hors de celle-ci, chacun des flux de recirculation locaux (114) s'écoulant à travers la chambre de traitement (106) de multiples fois ; et - un guide de recirculation global (120), au moyen duquel un flux de recirculation global (122) peut être évacué de la pluralité de modules de recirculation locaux (112) et/ou de la chambre de traitement (106), peut être préparé au moyen d'un dispositif de préparation (126) et peut à nouveau être fourni à au moins un module parmi la pluralité de modules de recirculation locaux (112) et/ou la chambre de traitement (106).
EP23729936.7A 2022-05-24 2023-05-23 Système de recirculation, installation de traitement et procédé de fonctionnement d'un système de recirculation Pending EP4533010A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022113071.1A DE102022113071A1 (de) 2022-05-24 2022-05-24 Umluftanlage, Behandlungsanlage und Verfahren zum Betreiben einer Umluftanlage
PCT/DE2023/100377 WO2023227165A1 (fr) 2022-05-24 2023-05-23 Système de recirculation, installation de traitement et procédé de fonctionnement d'un système de recirculation

Publications (1)

Publication Number Publication Date
EP4533010A1 true EP4533010A1 (fr) 2025-04-09

Family

ID=86760571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23729936.7A Pending EP4533010A1 (fr) 2022-05-24 2023-05-23 Système de recirculation, installation de traitement et procédé de fonctionnement d'un système de recirculation

Country Status (4)

Country Link
EP (1) EP4533010A1 (fr)
CN (1) CN119183517A (fr)
DE (2) DE102022113071A1 (fr)
WO (1) WO2023227165A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110567263A (zh) * 2019-09-17 2019-12-13 上海兰宝环保科技有限公司 一种挥发性有机物源头控制及末端治理系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849001A1 (fr) * 1996-12-20 1998-06-24 Robert sen. Wälti Cabine de pulvérisation et système de circulation d'air dans un espace de travail
HUE030552T2 (hu) * 2009-12-30 2017-05-29 Crone Wärmetechnik GmbH Eljárás lakkozott szárítandó tárgyak, különösen jármûkarosszériák szárítására
DE102015214706A1 (de) 2015-07-31 2017-02-02 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102015224916A1 (de) 2015-12-10 2017-06-14 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102020213991A1 (de) 2020-11-06 2022-05-12 Dürr Systems Ag Verfahren zum Betreiben einer Behandlungsanlage und Behandlungsanlage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110567263A (zh) * 2019-09-17 2019-12-13 上海兰宝环保科技有限公司 一种挥发性有机物源头控制及末端治理系统

Also Published As

Publication number Publication date
DE112023002391A5 (de) 2025-03-06
DE102022113071A1 (de) 2023-11-30
CN119183517A (zh) 2024-12-24
WO2023227165A1 (fr) 2023-11-30

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