EP2531796A1 - Dispositif de séchage d'objets - Google Patents

Dispositif de séchage d'objets

Info

Publication number
EP2531796A1
EP2531796A1 EP11705430A EP11705430A EP2531796A1 EP 2531796 A1 EP2531796 A1 EP 2531796A1 EP 11705430 A EP11705430 A EP 11705430A EP 11705430 A EP11705430 A EP 11705430A EP 2531796 A1 EP2531796 A1 EP 2531796A1
Authority
EP
European Patent Office
Prior art keywords
air
heat exchanger
primary gas
hot primary
hot
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
EP11705430A
Other languages
German (de)
English (en)
Other versions
EP2531796B1 (fr
Inventor
Apostolos Katefidis
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.)
Eisenmann SE
Original Assignee
Eisenmann SE
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 Eisenmann SE filed Critical Eisenmann SE
Publication of EP2531796A1 publication Critical patent/EP2531796A1/fr
Application granted granted Critical
Publication of EP2531796B1 publication Critical patent/EP2531796B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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 invention relates to a device for drying of objects, in particular of vehicle bodies, with a) a drying tunnel, which is arranged in an insulated housing; b) a plurality of tunnel sections, each comprising at least one air outlet and at least one air inlet; wherein c) each tunnel section is assigned a heating unit to which air can be supplied from the at least one air outlet of the tunnel section and in which a hot primary
  • Such known from the market dryer are used in particular for drying freshly painted vehicle bodies, but also for drying other objects.
  • Such dryers are heated by, inter alia, extracting air from short tunnel sections which are short of the total length of the drying tunnel, heating them in a heating unit by means of a heat exchanger and recirculating them to the corresponding tunnel section.
  • CONFIRMATION COPY The air taken from the tunnel section is mainly loaded with solvent, which is released during the drying process. In addition, in this air are found when drying the vehicle body liberated coating components; However, for the sake of simplicity, only air-containing air or exhaust air will be referred to below.
  • Disposal of solvent-containing exhaust air takes place in a separate and independent system from the heating circuits.
  • the solvent-containing exhaust air to be disposed of is sucked off at a central outlet of the drying tunnel and fed to a thermal or regenerative afterburning, in which the solvents are burned.
  • the afterburning heat exchangers are switched downstream, in which fresh air is heated by means of the resulting hot combustion gases. This hot fresh air is then fed to the drying tunnel, whereby this is also heated.
  • the conduction paths to lead the solvent-containing exhaust air for afterburning are quite long. Since a complex isolation of these lines is required, the resulting costs for the system are relatively high overall.
  • the heating unit comprises a distributor device, by means of which the air emerging from a tunnel section can be divided into a recirculating air stream and an exhaust air stream; f) the heating unit comprises a thermal post-combustion device to which the exhaust air can be supplied and through which the hot primary gas flow can be generated.
  • the afterburning and thus the disposal of the solvent-containing exhaust air is integrated into the heating unit and only a portion of the air extracted from the tunnel section is recirculated as recirculation air back into the tunnel section.
  • the hot combustion gases form at least in part the hot primary gas flow which is used to heat the recirculation air. As a result, the energy contained in the hot combustion gases is effectively used to heat the dryer.
  • an external afterburning as is customary in systems known from the market, can be dispensed with.
  • this lowers the construction costs and, on the other hand, allows a more compact design of the dryer. In addition to the smaller space requirement of the dryer thereby thermal losses are reduced.
  • the afterburner is a gas burner.
  • Trockners particularly favorable when the gas burner is operable without supply of additional air.
  • the hot primary gas stream solely from hot combustion gases, which are thus fully and effectively used to heat the circulating air.
  • the gas burner is a surface burner. A surface burner offers a good burning performance and does not require any additional air supply.
  • the heating unit comprises an exhaust heat exchanger in which hot primary gas can be conducted and in which the exhaust air can be heated by hot primary gas before reaching the afterburner, the exhaust air can be preheated prior to their combustion. In this way, the energy required by the burner can be reduced, which is required to heat the lierestoffhaltxge exhaust air from its initial temperature, with which it reaches the burner to the combustion temperature.
  • the amount of hot primary gas which is supplied to the exhaust air heat exchanger, by means of a first regulating flap is adjustable. In this way, the extent of preheating the exhaust air can be adjusted.
  • the first regulating flap can be arranged in a bypass line, through which hot primary gas can be conducted past the exhaust-air heat exchanger.
  • hot primary gas which has flowed through the exhaust air heat exchanger
  • the hot combustion gases can be used twice and thus particularly effectively. They then serve on the one hand for preheating the exhaust air and on the other hand for heating the circulating air.
  • the temperature of the coming from the exhaust heat exchanger hot primary gas is not sufficient to heat the circulation air to the desired temperature, e is advantageous if the circulating air heat exchanger hot primary gas from a section of the bypass line can be fed to the downstream of first regulating flap is arranged. In this way, the recirculating air heat exchanger is not or only very little cooled primary gas can be supplied.
  • the amount of primary gas for the recirculating air heat exchanger can be regulated via the second regulating flap without the position of the first regulating flap and the exhaust air heat exchanger passed part of the primary gas stream would have to be changed.
  • the heating unit comprises a fresh air heat exchanger in which hot primary gas can be conducted and in which fresh air can be heated by hot primary gas
  • the primary gas can also be used to heat any fresh air required for drying the dryer.
  • the primary gas stream can be used in triplicate if the heating unit comprises a fresh air heat exchanger in which hot primary gas can be conducted, which has flowed through the exhaust air heat exchanger and the circulation air heat exchanger.
  • the fresh primary gas supplied to the fresh air heat exchanger may have previously passed through only the exhaust air heat exchanger or the recirculating air heat exchanger.
  • the fresh air heat exchanger hot Primary gas from a portion of the bypass line can be fed, which is arranged downstream of the second regulating flap
  • Hot fresh air is supplied in particular to an entrance lock area arranged at the entrance of the tunnel tunnel and / or to an outlet lock area arranged at the exit of the drying tunnel, from where the hot fresh air can flow into the drying tunnel.
  • FIG. 1 shows a schematic layout of a dryer with a drying tunnel comprising several tunnel sections, to each of which a heating unit is assigned;
  • FIG. 1 shows a heating unit shown in Figure 1 on an enlarged scale.
  • a total of 10 denotes a dryer, which comprises an insulated housing 12, in which a drying tunnel 14 is arranged.
  • the drying tunnel 14 comprises a plurality of tunnel sections 16.1, 16.2, 16 n arranged one behind the other.
  • the dryer 10 is used in particular for drying freshly painted vehicle bodies, but can also be used in its basic concept for drying any objects.
  • the vehicle bodies enter the dryer 10 at one end of the dryer 10 on a conveying system (not shown), first pass into an inlet lock 18 and from there into the drying tunnel 14. The vehicle bodies finally exit the dryer 10 through an outlet sluice 20 in the dried state, after they have passed through the tunnel sections 16.1, 16.2, 16. n.
  • Each tunnel section 16. 1, 16. 2, 16. N has an air outlet 22 and an air inlet 24.
  • Each tunnel section 16.1, 16.2, 16. n is also assigned its own heating unit 26, of which only the heating units 26 of the tunnel sections 16.1 and 16.2 can be seen in FIG.
  • the heating units 26 can be heated from the respective tunnel section 16.1, 16.2, 16 n sucked air and be returned in a cycle through the respective air inlet 24 in the corresponding tunnel section 16.1, 16.2, 16 n.
  • the returned air is e.g. guided on non-specifically illustrated nozzles on the vehicle bodies to be dried. In this way, it is possible to maintain different temperatures in the tunnel sections 16.1, 16.2, 16, as is most favorable for the drying process.
  • the structure and operation of the heating units 26 will now be described using the example of the tunnel section 16.1 associated heating unit 26.
  • the remaining heating units 26 are constructed accordingly and work in the same manner.
  • the heating unit 26 comprises a fan 28, which is arranged in a line 30, which is connected to the air outlet 22 of the tunnel section 16.1, so that solvent-containing air can be sucked out of the tunnel section 16.1.
  • This solvent-containing air is usually between about 140 ° C and 220 ° C hot.
  • the temperatures specified below relate to a drying process and a air balance, as they usually occur during drying of cataphoretic dip-coated vehicle bodies, for example. Depending on the type of varnish used, deviations upwards and downwards are possible accordingly.
  • the solvent-containing air in the tunnel section 16.1 is about 200 ° C hot.
  • the line 30 opens downstream into a distribution device 32 which divides the sucked air into an exhaust air stream and a recirculating air stream.
  • the exhaust air flows from the distributor device 32 further through a line 34 into a heat exchanger coil 36 of an exhaust air heat exchanger 38. From there it flows into a combustion chamber 40 of a thermal afterburning device 42 with a gas burner 44, which is indicated by two arrows 46 and 48.
  • a gas burner 44 a burner is used in the embodiment described here, which can be operated without the supply of additional air.
  • a surface burner has proven itself, as it is known in and of itself.
  • a. Blower burners are used, which must be supplied in a known manner for operation specifically air.
  • the Solvent in the exhaust air burned as much as possible, with the primary gas hot combustion gases produced at a temperature of about 700 ° C.
  • These hot combustion gases are led via a supply line 50 to the exhaust air heat exchanger 38, where they heat the flowing through the heat exchanger coil 36 solvent-containing exhaust air to a temperature of about 400 ° C. At this temperature, the solvent-containing exhaust air consequently flows into the combustion chamber 40 of the thermal afterburning device 42.
  • the originally about 700 ° C hot combustion gases are cooled in the exhaust air heat exchanger 38 and leave this via a first intermediate line 52 at a temperature of about 450 ° C.
  • the combustion gases are passed into a ümicalz Kunststoff heat exchanger 54.
  • Whose heat exchanger coil 56 is traversed by the circulating air, which is supplied to the circulation air heat exchanger 54 via a line 56 from the manifold 32.
  • the recirculating air coming from the distributor 32 at a temperature of about 200 ° C is heated by the hot combustion gases to a temperature of about 220 ° C, the hot combustion gases in turn cooling from about 450 ° C to a temperature of about 350 ° C.
  • the approximately 220 ° C hot recirculating air flows from the heat exchanger coil 56 of the recirculating air heat exchanger 54 in a return line 58, which leads to the air inlet 24 of the tunnel section 16.1. From there, the air is guided back to the vehicle bodies to be dried.
  • the now about 350 ° C hot combustion gases flow in the heating unit 26 from the circulation air heat exchanger 54 via an intermediate line 60 in a fresh air heat exchanger 62, whose heat exchanger coil 64 is fed via a fresh air line 66 with a fan 68.
  • the fresh air in the heat exchanger coil 64 is heated to about 200 ° C, wherein the hot combustion gases in turn cool to about 80 ° C.
  • the hot fresh air leaves the fresh air heat exchanger 62 via a line 70, which leads to the entrance lock 18. From there it enters the drying tunnel 14.
  • the cooled to 80 ° C combustion gases are passed through a discharge line 72 through a condensate 74 and from there to an exhaust chimney 76. About this get the purified combustion gases into the environment.
  • the supply line 50 is connected to the exhaust air heat exchanger 38 with the discharge line 72 at the fresh air heat separator 62 via a bypass line 7.8 'in connection.
  • This has four bypass sections 78a, 78b, 78c and 78d, wherein between the first section 78a and the second section 78b, a first regulating flap 80, between the second section 78b and the third section 78c, a second regulating flap 82 and between the third section 78c and the fourth section 78d, a third regulating flap 84 is arranged.
  • the second bypass section 78b communicates via a conduit 86 with the intermediate conduit 52 between the exhaust air heat exchanger 38 and the recirculating air heat exchanger 54 in connection.
  • the third bypass section 78c communicates via a line 88 with the intermediate line 60 between the recirculating air heat exchanger 38 and the fresh air heat exchanger 54 in connection.
  • the hot combustion gases are completely guided out of the combustion chamber 40 into the exhaust air heat exchanger 38.
  • the exhaust air is thereby preheated in the exhaust air heat exchanger 38 to 400 ° C, whereby relatively little energy is required for the gas burner 44 to heat the thus preheated exhaust air to the combustion temperature of 700 ° C.
  • the first regulating flap 80 can be opened.
  • a portion of the about 700 ° C hot combustion gases are thereby passed from the combustion chamber via the first two bypass sections 78a and 78b and the line 86 in the first intermediate line 52, where they mix with the coming of the exhaust air heat exchanger 38 combustion gases.
  • the resulting combustion gas flow has a higher temperature than the combustion air coming from the exhaust air heat exchanger 38. voltage gases.
  • more energy is supplied to the recirculating air heat exchanger 54 for heating the recirculation air.
  • the proportion of the combustion gases flowing through the bypass line 78 into the intermediate line 52, and thus the energy supplied to the recirculating air heat exchanger 54 as a result of the mixing of the two gas streams, can be controlled via the opening degree of the first regulating flap 80.
  • the exhaust air in the exhaust air heat exchanger 38 is open, the first adjusting damper 80 is not preheated to the extent that such closed first adjusting damper 80.
  • the power of the gas burner 44 must be increased in order to reach the combustion temperature in the combustion chamber 40, resulting in a higher consumption of fuel gas for the gas burner 44.
  • the additional opening of the second regulating flap 82 in the bypass line 78 causes the hot combustion gases from the combustion chamber 40 to enter the intermediate conduit 60 where they heat the combustion gas stream coming from the recirculating air heat exchanger 54.
  • the combustion gases then flow at a higher temperature into the fresh air heat exchanger 62 than in the case of the closed second regulating flap 82.
  • the proportion of the combustion gases flowing through the bypass line 78 into the intermediate line 60 and thus the energy that the fresh air heat exchanger 62 as a result. the mixing of the two gas streams is supplied, can here via the opening degree of the second regulating flap 82, optionally in conjunction with the opening degree of the first regulating flap 80, are controlled.
  • the opening degree of the two Naturally, the regulating flap 82 likewise influences the proportion of the combustion gases flowing through the bypass line 78, which pass to the first intermediate line 52, which in turn has an effect on the temperature of the combustion gas flow resulting in the circulation heat exchanger 54.
  • regulating valves are also provided in one or both lines 86, 88.
  • a bypass flow path of combustion gases at the exhaust air heat exchanger 38 and the recirculation air heat exchanger 54 to the fresh air heat exchanger 62 or a bypass flow path of combustion gases on all three heat exchangers 38, 54 and 62 to the discharge line 72 are additionally possible ,
  • Each heating chamber 26 thus contributes both to the disposal of solvent-containing exhaust air and to the heating of the dryer.
  • the pollutants carried by the exhaust air are largely converted directly into usable energy in the heating chambers 26. converts.
  • rauss the burner no additional fresh air to be supplied; for the combustion air or the primary gas flow directly the hot exhaust air is used. It is also possible to retrofit existing dryers, as known from the prior art and which implement an external afterburning of the exhaust air, with heating chambers 26, as described above.

Landscapes

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

Abstract

L'invention concerne un dispositif de séchage d'objets, notamment de carrosseries de véhicules, comportant un tunnel de séchage (14) disposé dans un boîtier isolé (12), et une pluralité de segments de tunnel (16.1, 16.2,..., 16.n) présentant respectivement au moins une sortie d'air (22) et au moins une entrée d'air (24). Un groupe de chauffe (26) est affecté à chaque segment de tunnel (16.1, 16.2,..., 16.n), de l'air issu de la ou des sorties d'air (22) du segment de tunnel (16.1, 16.2,..., 16.n) pouvant être acheminé vers le groupe de chauffe et un flux de gaz primaire chaud pouvant être produit dans le groupe de chauffe. Le gaz primaire chaud peut être guidé dans un échangeur thermique à air pulsé (54) du groupe de chauffe (26), dans lequel de l'air pulsé peut être chauffé par le gaz primaire chaud, puis réacheminé vers le segment de tunnel (16.1, 16.2,..., 16.n) dans un circuit au moyen de la ou des entrées d'air (24). Le groupe de chauffe (26) comporte un répartiteur (32) permettant de diviser l'air quittant un segment de tunnel (16.1, 16.2,..., 16.n) en un flux d'air pulsé et un flux d'air d'évacuation. Le groupe de chauffe (26) comporte également un dispositif de post-combustion thermique (42) vers lequel l'air d'évacuation peut être acheminé et permettant de produire le flux de gaz primaire chaud.
EP11705430.4A 2010-02-01 2011-01-26 Dispositif de séchage d'objets Not-in-force EP2531796B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010006550.1A DE102010006550B4 (de) 2010-02-01 2010-02-01 Vorrichtung zum Trocknen von Gegenständen
PCT/EP2011/000324 WO2011091992A1 (fr) 2010-02-01 2011-01-26 Dispositif de séchage d'objets

Publications (2)

Publication Number Publication Date
EP2531796A1 true EP2531796A1 (fr) 2012-12-12
EP2531796B1 EP2531796B1 (fr) 2016-04-27

Family

ID=44063883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11705430.4A Not-in-force EP2531796B1 (fr) 2010-02-01 2011-01-26 Dispositif de séchage d'objets

Country Status (6)

Country Link
EP (1) EP2531796B1 (fr)
JP (1) JP5990104B2 (fr)
CN (1) CN102906522B (fr)
BR (1) BR112012018965B1 (fr)
DE (1) DE102010006550B4 (fr)
WO (1) WO2011091992A1 (fr)

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DE102011119436B4 (de) * 2011-11-25 2020-08-06 Eisenmann Se Vorrichtung zum Temperieren von Gegenständen
DE102012004246A1 (de) * 2012-03-01 2013-09-05 Eisenmann Ag Vorrichtung zur thermischen Nutzung eines Primärfluids und Anlage zur Behandlung von Gegenständen mit einer solchen
DE102012023457A1 (de) * 2012-11-30 2014-06-05 Eisenmann Ag Verfahren und Vorrichtung zum Temperieren von Gegenständen
DE102013004136A1 (de) * 2013-03-09 2014-09-11 Volkswagen Aktiengesellschaft Vorrichtung zum Trocknen eines Werkstücks und Verfahren zum Betrieb einer derartigen Vorrichtung
DE202013105737U1 (de) * 2013-12-17 2014-02-12 mecoplan GmbH Trocknungsanlage
DE102015102955B4 (de) * 2015-03-02 2017-03-23 Sturm Maschinen- & Anlagenbau Gmbh Verfahren und Anlage zur Oberflächenbehandlung eines Werkstückes
DE102015003856A1 (de) * 2015-03-26 2016-09-29 Eisenmann Se Vorrichtung zur Temperierung von Gegenständen
DE102015214706A1 (de) 2015-07-31 2017-02-02 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102015214711A1 (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
DE102016001893A1 (de) 2016-02-17 2017-08-17 Eisenmann Se Brennereinheit und Vorrichtung zum Temperieren von Gegenständen
DE102016125060B4 (de) * 2016-12-21 2023-02-16 Eisenmann Gmbh Vorrichtung zum Temperieren von Gegenständen
DE102017105094B4 (de) 2017-03-10 2025-02-06 Eisenmann Se Temperiervorrichtung für oberflächenbehandelte Gegenstände wie Fahrzeugteile
JP7041705B2 (ja) 2020-03-18 2022-03-24 本田技研工業株式会社 樹脂硬化装置及び樹脂硬化方法
KR20240018592A (ko) * 2021-06-07 2024-02-13 가부시키가이샤 다이키샤 도장용 건조 설비

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Also Published As

Publication number Publication date
WO2011091992A1 (fr) 2011-08-04
CN102906522B (zh) 2015-11-25
EP2531796B1 (fr) 2016-04-27
JP2013518236A (ja) 2013-05-20
BR112012018965B1 (pt) 2020-12-15
BR112012018965A2 (pt) 2017-10-10
DE102010006550A1 (de) 2011-08-04
DE102010006550B4 (de) 2015-08-13
CN102906522A (zh) 2013-01-30
JP5990104B2 (ja) 2016-09-07

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