DE2828130A1 - METHOD FOR CLEANING THE EXHAUST AIR FROM A PAINT SPRAYING SYSTEM - Google Patents

Description

- 13 - QD 83 Gr / Bt 3/4

2ό. June 1978

Applicant;

Otto Dürr Anlagenbau GmbH,

Spitalwaldstrasse l8, 7OOO Stuttgart 40

"Process for cleaning the exhaust air from a paint spraying system"

The invention relates to a method and a device for cleaning the exhaust air from a paint spraying system, with the exhaust air taken up in the system pesticides such as paint particles or the like. to one for the absorption of the pesticides capable filter medium releases.

The filters used so far in practice are unsatisfactory. They either leave a majority of the solids through, so that the filtered exhaust air or the filtered exhaust gas is still contaminated with solids; or put them in a relatively short time, so that their performance decreases correspondingly quickly and they very soon, with continuous operation usually need to be replaced or cleaned every day. The work process is disrupted, if necessary interrupted. An alternating operation with alternately

§09802 / 0310

Filters that can be switched on and off is expensive and often unsustainable for economic reasons. Even Centrifugal separators are used to clean the exhaust air, which is enriched with paint residues, from the contaminant particles not suitable. The degree of cleaning is unsatisfactory. In particular, the paint particles remain in whole or in part in the exhaust air. The use of water is also neither technically nor economically satisfactory Respect.

In particular, it was not possible with the filters used up to now to remove those contained in the filtered exhaust air Recover thermal energy in an economically viable manner, since the gases still contained in the filtered gases Solids settle in the system for heat recovery, in particular in a heat exchanger, the same polluted and made unusable.

The main object of the invention is to provide as complete a cleaning as possible with the paint particles or similar solid particles enriched exhaust air in a technically and economically flawless manner.

Furthermore, as complete a separation as possible of the environmentally harmful gaseous contained in the exhaust air is achieved and liquid components or their utilization is sought.

§09802 / 0330

The main thing in the invention is that the A filter medium consisting of pourable filter material using gravity, a filter moving bed forming, fed to the exhaust air laden with the solids, from this with the release of the solids, in particular Paint particles, flowed through and then loaded with the solids in turn from the filter moving bed is derived.

By the invention it is achieved that the exhaust air always with new unloaded, for the absorption of solids, In particular, Laekteilchen, particularly absorbent filter medium is brought into contact, so that a constant Unimpaired absorption capacity of the filter medium for the accumulation of solids is guaranteed. The solid particles the exhaust air is taken along by the pourable filter medium falling under the force of gravity, while the exhaust air they clean continues on its way regardless. Preferably this is done with the usually sticky solids from the exhaust air-laden filter medium - at least partially after regeneration in a reactor - fed back to the filter moving bed in the circuit. The cycle can be continuous or optional can also be carried out intermittently or in cycles.

909882/0330

- Ιό -

According to a further feature of the invention, however, the solids-free or substantially free-from-solids nor the gaseous or also liquid or partially liquid constituents, in particular solvents Exhaust air to release these components through a moving adsorption bed with adsorption medium passed through the exhaust air flow continuously or intermittently, in particular Activated carbon, passed through.

In order to further improve the economic efficiency of the process and reduce energy losses to a minimum, according to a further feature of the invention, the cleaned exhaust air is fed back to the paint-spraying system. The heat in the exhaust air can also be subjected to a recovery process. With regard to the previous one Intensive cleaning of the exhaust air from the paint and dirt particles by the filter moving bed is pollution of heat exchangers or other heat recovery systems by pest, as it occurred in previous pilter processes in paint spraying systems and despite multiple Efforts not resolved in an economically sustainable manner could not be feared. The heat recovery can be carried out using a moving bed filter, before the exhaust air is fed to the moving bed adsorber, or even, which is usually more advantageous after the Exhaust air has already flowed through the moving bed adsorber.

909882/0330

~ ¹⁷ ~ 2823130

In order to increase the economy, the moving adsorption bed is also advantageously in contact with the exhaust air incoming adsorption medium in a cycle by, after being freed from the solvent, in a desorption or reactivation reactor is fed back to the moving bed. A particularly effective regeneration of the adsorbent can be achieved with a double moving bed, in particular in such a way that the adsorbent of a moving bed first through which the exhaust air flows or a corresponding moving bed zone is reactivated and the adsorbent of a moving bed through which the exhaust air then flows or a corresponding moving bed zone is desorbed.

The regeneration of the filter medium can be done thermally, in particular by burning the pesticides taken with it, chemically or mechanically, for example also by vacuum or in a combined manner.

The circular transport of the filter material or the adsorbent material can be done by any means, e.g. pneumatically or mechanically and optionally also hydraulically.

In addition, the solvent can be removed from the exhaust air, e.g. in a desorption or reactivation reactor, again for the spray paint system or the like. be used.

909802/0330

2928130

The heat exchange can be regenerative with the release of heat and humidity or recuperative with the release of heat, e.g. to the fresh air for the painting booths.

To further improve the heat utilization, the fresh air heated by the heat of the exhaust air can be used one after the other individual sections of the spraying process are fed in series, so that the heated fresh air one after the other Z..B. first a pre-painting by spraying by hand, then a machine painting and finally an evaporation zone and only then the moving bed filter be forwarded. Compared to a parallel connection of these sections in the fresh air flow, savings can be made in supply air from J5O to 50 / ° and thus a lower heat requirement achieve.

The invention also relates to devices for carrying out the method according to the invention, in particular in connection with moving bed filters and their arrangement in a circulation system for the filter medium.

Fifteen exemplary embodiments of the invention are shown in the drawing Systems shown diagrammatically in FIGS. 1 to 15.

In the figures, 10 indicates a paint spray system, which is divided into, for example, four chambers or zones 11 to 14, for example one

909882/0330

Abrasion zone, a hand spray zone, an automatic (machine) Spray zone and an evaporation zone, which is drawn from the objects to be painted, e.g. car bodies, in the direction of the arrow are passed through one after the other, is subdivided and the fresh supply air via a supply air system 15 and a line 16

is forwarded. The supply line can be provided in this way be that they only go to individual chambers or zones of the paint spray installation, e.g. as shown in Figs. 1, 7 and 8 the zones 11 and 12, or to all zones, as shown in FIGS. 2 and 3, takes place. Any other line routing is also possible, for example one in which the supply air, instead of being fed to the individual chambers or zones in parallel, completely or partially in series one after the other is passed through the chambers or zones, which allows a saving in supply air.

When flowing through the paint shop 10, the supply air absorbs paint particles and solvent and arrives as exhaust air laden with them via a collecting line IJ into a moving bed filter 18, in which the exhaust air flows through the moving bed l8a of a filter medium to which it receives the solid particles contained in the exhaust air, in particular paint - and dirt particles.

In Fig. 1, the exhaust air, which is still enriched with solvent from zones 11 and 12, is passed through a line 19, if it is e.g. not routed back to the air supply system 15 via a line 19a

809882/0330

232813Q

is fed to the remaining zones Γ5 and 14 first and after flowing through the same via a line 20 for any further suitable treatment or recycling derived. If necessary, some of the exhaust air, e.g. from the cabin or zone 12, can bypass the moving bed filter 18 also directly, as indicated by line 20a, to the outside or the like. be derived.

The filter medium leaving the moving bed of the moving bed filter 18 is passed through a reactor 21 (optionally with Gas discharge 21a), in which the filter medium from the solids (paint particles, dirt particles) - in particular through Heating or combustion of the same - is cleaned again, and via a line 22 to the inlet side of the moving bed 18a of the moving bed filter 18 returned so that the filter medium is in a constant cycle through the moving bed filter executes. If necessary, a part of the filter medium, as indicated at 22a, can be bypassed Reactor 21 can be fed again directly to the moving bed 18a of the filter. A urase retaining device can be provided be to guide the filter medium either via the reactor or via the bypass line 22a.

In all cases, any filter medium for the moving bed 18a can be used to absorb the solid particles, that is to say in particular of paint particles, which are usually sticky in nature

909882/0330

232813Q

are suitable, preferably pourable material, such as e.g. corundum or an aluminum-silicon compound, but also steel balls or the like. be used. The onward or return transport of the filter medium can, for example, be mechanical, under Under certain circumstances also with the help of gravity, or in a combined manner by means of a conveyor belt, pneumatic Funding or the like. take place.

The embodiment of FIG. 2 differs from that of FIG. 1 in that the zones or chambers 11 to 14 are flowed through in parallel by the exhaust air and the exhaust air cleaned in the moving bed filter 18 is returned to the supply air system 15 via a line J50.

In the embodiment of FIG. 3, the solids purified exhaust air via a line 23 of a heat recovery system 24, in particular a heat exchanger, and then via a discharge line 25., if permissible, diverted to the outside or forwarded for further treatment or further use. In the heat recovery system 24 is contained in the exhaust air, in the paint shop or in the moving bed filter 18 or in upstream or intermediate Heating devices absorbed heat either directly fed in via a line 26 and to the air supply system 15 forwarded supply air or transferred to another intermediate medium, which in turn, the heat as possible

909882/0330

~ ²² ~ 2528130

largely transfers to the supply air in the supply air system 15. This heat recovery in connection with the cleaning of the exhaust air by the moving bed filter and the resulting achieved long-term effectiveness of the heat exchanger an optimal heat balance can be achieved.

Of course, de can be recovered in the heat recovery system 24 Heat can also be used for other purposes. The heat exchange can also take place in any desired manner, e.g. can also be carried out regeneratively with simultaneous transfer of moisture.

In contrast to the previous exemplary embodiments, in the exemplary embodiment according to Pig. 4 those in the moving bed filter 18 exhaust air purified from the solid particles is fed via a line 28 to a moving bed adsorber 29, whose moving bed 29a is part of a cycle carried out by the adsorption medium, in particular activated carbon. the Exhaust air releases the gaseous, possibly also partially liquid components contained in it, in particular Paint solvent to the moving bed 29a of the adsorber 29 by the exhaust air flowing through the moving bed 29a and then discharged to the outside via a line 30 or another use, preferably as shown in Fig. 4, is fed again as part of the supply air to the supply air system 15 or the spray painting system 10.

909882/0330

,,. ■■ ³ 2928130

In a similar manner to the filter medium which is the moving bed 29a forms adsorption medium, in particular activated carbon, after admission of the gaseous components of the exhaust air, in particular solvent, a desorption reactor 31 (with feeding JLa. Of steam and wet flue gas) under heating (for example to about 250 ⁰ C), in which the gaseous constituents are expelled from the adsorption medium and discharged to the outside or are fed to a further cleaning or recovery system 32, in particular for recovering the paint solvent.

The regenerated adsorption medium coming from the reactor 31 is cooled in a cooler 33 as shown in FIG then in the circuit via a line 3 ^ to the input side of the moving bed 29a conveyed back. The promotion of the Adsorption medium can again take place mechanically, pneumatically or hydraulically in any suitable manner .

Instead of a desorption reactor, a reactivation reactor (for example at temperatures of about 750 ^° C.) can optionally also be used.

In the exemplary embodiment according to FIG. 5, the difference is 4, instead of a moving bed adsorber, a fixed bed adsorber 35 is provided. The deposited in him

909882/0330

262813Q

the solvents can be fed back to a solvent recovery system 32. The adsorber can regenerate the adsorption medium after the exhaust air supply has been interrupted connected to a desorption system, e.g. with steam supply at 32a will.

The embodiment of FIG. 6 differs from that of Fig. 4 mainly in that in the from Adsorber 29 coming exhaust line 23 a heat recovery system 24, for example as shown in Fig. 3, is switched on.

The embodiment according to FIG. 7 shows a combination of FIGS. 1 and 4 and differs from that according to Fig. 4 in that the fresh supply air, as in Fig. 1, initially only a part of the chambers or zones of the spray paint system 10, then - according to FIG. 1 - a moving bed filter 18 and only then the remaining chambers or zones of the spray paint system 10 is forwarded. The exhaust air finally discharged from the paint spray system 10 is in this case fed via a line 17a to a second moving bed filter 18, which corresponds to the moving bed filter 18 according to FIG. 4. FIG. 7 also shows connecting lines 19a, 19b and 17b which can be optionally provided.

The exemplary embodiment according to FIG. 8 represents a combination of the exemplary embodiments according to FIGS. 7 and 6 in that

909882/0330

282813Q

the exhaust air cleaned of solid particles and gaseous components from the line 23 for heat recovery is used in a heat recovery system 24 by direct or indirect heat dissipation to the supply air.

The embodiment according to FIG. 9 corresponds in principle to that according to FIG. 6, but differs from it in that instead of a simple moving bed adsorber 29, a double bed adsorber 129 with the moving beds 129 a and 129b is used. The desorption medium, in particular activated carbon, is separated from the top of the two moving beds fed and discharged separately from the moving beds at the bottom. That in the moving bed with the adsorbable gaseous or even liquid components of the exhaust air, in particular paint solvents, loaded adsorption medium is when Exit from the moving bed 129a to a desorption reactor 31 * at the exit 'from the moving bed 129b is fed to a reactivation reactor 13I, the desorption in the desorption reactor 31 with the supply of steam at 32a and / or moist Flue gas takes place at about 250 ° C while in the reactivation reactor at much higher temperatures, e.g., about 750 ° C, "burning of the desorbent medium absorbed pollutants takes place. The desorbed substances from the desorption reactor, especially paint solvents, can be fed back to a recovery system 32, while the substances burned in the reactive reactor are classified as

909882/0330

2628130

Exhaust gas discharged to the outside via 131a or for use of the Viarme contained in it.

Preferably, the 2δ from line is in the double adsorber 129 entering exhaust air first to the moving bed 129b connected to the reactivation reactor 131 and only then fed to the moving bed 129a connected to the desorption reactor 31, as is also the case in the exemplary embodiment according to FIG. 9 is shown. The pollutants initially deposited are therefore subject to the more intensive exposure of the reactivation reactor, while the following moving bed 129a is particularly suitable for receiving the again to be recovered solvent to serve. The adsorption medium regenerated in reactors 131 and 31 can then be used together after passing through a cooler 33 to the double bed adsorber 129 to be returned. If desired, can however, the return can also be carried out separately.

Instead of separate moving beds 129a and 129b, these can also be combined into a common moving bed, in particular such that the layer of the moving bed through which the exhaust air initially flows to the reactivation reactor and the layer through which the exhaust air only flows is connected to the desorption reactor.

909882/0310

- ²⁷ ~ 2628130

The embodiment according to Pig. 10 differs from that of FIG. 9 only in that only a single one Moving bed 29a of the moving bed adsorber 29 used and the the adsorbent forming the moving bed 29a only after it has been discharged from the moving bed for forwarding to a desorption reactor 31 on the one hand and to a reactivation reactor on the other hand is divided.

The embodiment according to FIG. 11 shows a system in the fixed bed adsorber 35 connected downstream of the moving bed adsorber 29 are. The desorption medium, in particular activated carbon, is after the gaseous or still liquid components have been absorbed the exhaust air fed to a reactivation reactor 131 and after Regeneration in the reactor 131 via line 3 ^ the moving bed adsorber fed back.

The exhaust air partially cleaned in adsorber 29 is fed via line 23a to one or more, in the exemplary embodiment the two fixed bed adsorbers 35 connected in parallel, and then cleaned via line 23 to a heat recovery system 2) \. The extracted components of the exhaust air that are still usable in the fixed bed adsorbers under the action of the mixed gases generated in a combustion chamber 36 and the supplied steam, in particular paint solvents, can be fed to a recovery system 37 for further use.

909382/0330

~ ²⁸ ~ 2628130

The adsorber moving bed 29a has three zones 29a ', 29a "and 29a "', which are placed one behind the other both in the conveying direction of the adsorption medium and in the flow direction of the exhaust air are in such a way that - essentially in countercurrent - the zone 29a '' 'passed through by the adsorption medium last from the Exhaust air is flowed through first. However, a different current sequence can also be provided.

Fig. 12 shows an installation similar to that of Pig. 9 is similar. In contrast to this, however, are the walking beds of the filter 18 and the adsorber 129 combined to form a common filter-adsorber unit 118, the from the Exhaust air coming from the spray booth, one after the other, first the moving filter bed l8a and then the moving adsorber beds 129b and 129a flows through.

In a particularly compact design, the moving beds 18a, 129b and 129a can also be wholly or partly directly arranged adjacent to one another, the distance between the individual moving beds can be zero in the borderline case, as shown in Fig. IJ. For example, can In this case, too, only a single moving adsorber bed can be provided.

In Fig. 14 an alternative embodiment is shown at which has a filtering effect on the moving adsorber bed 29a

909832/0330

adsorber or pre-separator, possibly also a dehumidifier, is upstream. It can itself be designed as a moving bed filter and equipped with a moving bed 18b, e.g. from AIpO-, work. If necessary, the pre-adsorber moving bed 18b, a moving bed filter 18 can be connected upstream according to the previous embodiments. The ones from the Exhaust air coming in line 28a is passed through the moving bed l8b of the pre-adsorber or moving bed filter and then in countercurrent for the port movement of the moving bed 29a through this or one after the other guided through its zones, the moving bed 18b of the pre-adsorber or moving bed filter only over one Part of the adsorber moving bed 29a extends.

The embodiment of FIG. 15 differs from 14 only in that the adsorption medium emerging from the moving adsorption bed 29a is used for the one part a desorption reactor ^ l and the other part is fed to a reactivation reactor for regeneration, before it is sent via line 3 ^ to moving bed 29a of the moving bed adsorber 29 is returned.

Otherwise, the same reference numerals apply to the same or corresponding parts in all the exemplary embodiments.

It is of particular advantage, but not absolutely necessary, that in connection with a moving bed filter as well a moving bed adsorber is used. The exhaust air cleaned by a moving bed filter can also be used if necessary

8 8 2/0330

be freed from the gaseous components in another way, for which a fixed bed adsorber can also be used can. However, by using a VJanderbettfilters and a moving bed adsorber at the same time, one can be special achieve complete cleaning of the exhaust air, especially in connection with a downstream heat recovery system is desired or required.

Although the invention is primarily advantageous for spray painting systems, it can also be applied to others Use applications, for example in connection with drying chambers, if the process in question has similar requirements be asked. Further combinations of those described above can also be used within the scope of the invention Realize elements of the plants. In particular, a system for heat recovery can be added to the moving bed filter in all cases directly or indirectly, preferably downstream of a moving bed adsorber following the variable bed filter just as the individual elements or units can be combined with one another as required can.

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Claims (2)

GRÄMKOW, MANITZ & FINSTERWALD 7 STUTTGART 50 (BAD CAN NSTATT) SEELBEROSTRASSE 23/25 QD 63 3r / Fri 33/4 2.6. June 1978 applicant; Otto Dürr Anlagenbau GmbH, Spitalwaldstrasse 18, 7000 Stuttgart Claims: 1.] Process for cleaning the exhaust air from a paint spraying system, with the exhaust air taking up the solids such as paint particles in the system to absorb the pest substances emits capable pilter medium, thereby indicates that the ^{filter medium consisting of pourable x 7} filter material, using gravity to form a filter-vianderDett, is supplied to the air laden with the pesticides, flows through it, releasing the pesticides, in particular paint particles, and then, in turn, laden with the pesticides is derived from the filter moving bed (Pig. I to 15) · DIPL.- ING. W. GRAMKOW ~! STUTTCART 5O (BAU CANNSTa ₁ TTI SEELBERGSTR. 23 / 25.TEL.10711) 56 72 Gl DR C. MAN [TZ · D I PU-I NG. M. Fl NSTERWALD 8 MÖNCHEN 2 2. R O BERT-KOCH-STRASSE 1 TEL. (089) 224211. TELEX 05-29672 PATMF BATH ORIGINAL 2. The method according to claim 1, characterized by the use of a Filterraediutns (zE Al ₀ O-), through which not only paint particles but also liquid and / or gaseous substances are deposited at the same time. J. The method according to claim 1 or 2, characterized in that that the loaded with aen solids from aer Aoluft the filter medium after regeneration in a reactor Filter moving bed is fed back into the circuit (Figures 1 to 13). 4. The method according to claim 1, 2 or 3, characterized in that that of the filter medium leaving aas moving bed a part bypassing a reactor and a other 'x'eil via the reactor or optionally via the Reactor or, bypassing it, the moving bed is fed again (ig. 1 to 15) · tj. Process according to one of Claims 1 to 4, characterized in that the exhaust air freed or substantially freed from the solids and possibly gaseous constituents for the discharge of gaseous or liquid constituents, in particular solvents, through an adsorption bed of a continuously or intermittently advanced adsorption medium, in particular activated charcoal, Lindurckgeleicet (Fig.> ois 15}. BATH ORIGINAL 6. The method according to one of claims 1 to 5, characterized marked that of the pestilents and where appropriate Gaseous and / or liquid components freed or essentially freed exhaust air for delivery or further release of gaseous components, in particular of solvent, in whole or in part, is fed to one or more fixed bed adsorbers (Fig. 5,11). 7. The method according to any one of claims 1 to 6, characterized in that the solids and optionally Gaseous and / or liquid components freed or essentially freed exhaust air wholly or partially fed back to the paint spraying system or completely or partially fed to another use (Fig. 1 to I5). 8. The method according to any one of claims 1 to 7, characterized in that the pesticides by the Moving filter bed freed or essentially freed Exhaust air is subjected to heat recovery (Fig. J, 6.8 to 9, method according to claim 8, characterized in that the V / poor recovery from the exhaust air flow only after or in is made essentially after delivery of gaseous or liquid components to a moving adsorption bed. £ 09882/0330 282813Q 10. The method according to claim 8 or 9, characterized in that the cleaned exhaust air is fed back to the paint spraying system (Fig. 2,4,3 * 7) ozw. the heat recovered from the cleaned exhaust air is transferred to the supply air for the paint spraying system (Pig. 3jO, 8 ° i ^s 13) 11. The method according to any one of claims 4 to 10, characterized in that the miü gaseous or liquid Adsorption medium loaded with components from the exhaust air after regeneration in a reactor, the adsorption moving bed is supplied again in the circuit (Fig. J5 to 15). 12. The method according to claim 11, characterized in that recovered from the adsorption medium in the reactor Solvent is fed to the painting system or another use. 13. Method according to one of Claims 1 to 12, characterized in that the supply air for the paint spraying system is passed successively in series through different chambers or zones of the system (Fig. 1,7> 8). 14. The method according to claim 12, characterized in that that the supply air for the paint spraying system initially only through some of the chambers or zones of the system, then through a filter moving bed with the filtering out of solids taken up in the system and then is passed through further chambers or zones of the system (Fig. 1,7,8). 15. The method according to any one of claims 1 to 14, characterized characterized in that the exhaust air laden with solid particles passes through several filter moving beds one after the other is guided through (Fig. 7,8). 16. The method according to any one of claims 12 to I5, characterized characterized in that the exhaust air flowed through first through a first moving filter bed between the one or those of it Chambers or zones and that or that after flow through chambers or zones and then before the adsorption of the gaseous or liquid components is passed through a second filter moving bed (Fig. 7,8). 17. The method according to any one of claims 4 to 16, characterized in that the adsorption medium after leaving of the moving adsorption bed is regenerated by desorption / and / or reactivation (e.g. at about 750 ° C) of the adsorbent (Fig. 9,10,12,15). ⁺ ) (e.g. at about 25O ⁰ C) §09882 / 0330 282913Q 18 »Method according to one of claims 4 to I7, characterized marked that the purged of the pestilents Exhaust air is subjected to multiple adsorption processes or stages (Fig. 9,11,12, IJ). 19. The method according to any one of claims 4 to 18, characterized characterized in that the purified from the solids Exhaust air successively through several moving adsorption beds or moving bed zones and the adsorption medium of each moving bed or one each moving bed zone is regenerated separately (Fig. 3,11,12,13). 20. The method according to claim I9, characterized in that that the adsorption medium of the moving bed through which the exhaust air flows first or which flows through first Moving bed zones through reactivation and the adsorption medium of the moving bed through which the exhaust air then flows or ο the moving bed zone through which the flow then flows is regenerated by desorption (Fig. 9 * 12, 21. The method according to any one of claims 5 to 20, characterized characterized in that the exhaust air immediately after crossing a moving bed or a moving bed zone of a Moving bed filter and / or an adsorption filter through another moving bed or another moving bed zone is directed (Fig. 15 to I5). 292813.Q 22. The method according to any one of claims 5 to 21, characterized characterized in that the exhaust air is wholly or partially in countercurrent to the movement of the moving bed through it is guided through (Fig. 11,14,15). - 23. Device for performing the method according to one of the preceding claims 1 to 22, characterized by one or more, the paint spraying system (10) wholly or Moving bed filters (18), some of which are connected downstream, with the filter medium being guided under the effect of gravity in Moving beds for the separation of solid particles from the exhaust air of the system (Fig. 1 to 15). 24. The device according to claim 23, characterized in that that the moving bed filter or filters (18) has at least one moving bed adsorber (29, 129) and / or a fixed bed adsorber (35) downstream of the exhaust air in the pipe system is (Figures 3 to 15). 25. Apparatus according to claim 23 or 24, characterized in that that the moving bed filter (18) and / or the moving bed adsorber (29,129) are each in a circulation system (Line 22,34) a reactor (21 or 31,131) for separating the solids from the filter medium or is followed by paint components from the adsorption medium (Fig. 1 to 15). 909682/0530 26. Device according to one of claims 23 to 25, characterized by an exhaust air return line (30) between the moving bed adsorber (29) and the paint spraying system (10) (Pig. 2,4,5). 27. Device according to one of claims 23 to 26, characterized by one of the moving bed filters (18) or the moving bed adsorbers (29, 129) in the exhaust air line system downstream heat exchanger (24) or the like. System for recovering the contained in the exhaust air Heat, especially for direct or indirect heating of the supply air (supply air system I5) of the paint spray system (10) (Fig. 3 * 6.8 to I3). 28. Device according to one of claims 24 to 27, characterized in that the moving bed adsorber (29,129) both a reactivation reactor (I3I) and a desorption reactor (31) for the regeneration of the adsorption medium is also connected downstream (Fig. 9,10,12,13,15) 29. Device according to one of claims 24 to 28, characterized in that in the case of several by way of Adsorbers or adsorber beds (129a, 129b) arranged in exhaust air form part of a reactivation reactor (I3I), another part of which is a desorption reactor (31) is connected downstream for the regeneration of the adsorption medium (Fig. 9,12,13). 50. Device according to one of claims 24 to 29, characterized in that the moving bed adsorber (129) is formed as ^a double bed adsorber with a plurality of moving beds (129a, 129b) or moving bed zones directly adjacent to one another through which the exhaust air flows, and each of the Both moving beds or moving bed zones are followed by a separate reactor (31, 131) for the regeneration of the adsorption medium in the direction of movement of the same (Fig. 9, 12, Device according to claim JO, characterized in that that the moving bed (129b) preceding in the flow direction of the exhaust air or the corresponding moving bed zone a reactivation reactor (IjJl) and the moving bed following in the direction of flow of the exhaust air (129a) ■ or » the corresponding moving bed zone is a desorption reactor (Jl) is connected downstream (Fig, 9,12, 32. Device according to one of claims 2k to Jl, characterized in that the moving bed filter and moving bed adsorber are combined into one structural unit (Fig, 12 to I5). 33. Apparatus according to claim 32, characterized. That the moving bed (18a) of the moving bed filter (18) and the bed (s) (29a? 129a, 129b) of the wanderer tt adsorbers (29; I29) in zones or in layers one after the other for cross-flow through the exhaust air (Pig. I3 to I5). y \. Device according to one of Claims J> Q to 33 *, characterized in that the moving bed (18b) of a moving bed filter or a double moving bed adsorber (29) through which the exhaust air initially flows extends over only part of the length of the further moving bed (29a) through which the flow immediately thereafter ) of a moving bed adsorber or the double moving bed adsorber (29) and the exhaust air after entering this (29a) is guided through the last named moving bed against the movement of the moving bed. 35. Device according to one of claims k to 34, characterized by guiding the exhaust air through the adsorber filter bed (29a), one after the other through moving bed zones (29a ', 29a' ^!, 29a ¹ ") of the adsorber filter bed successively in the conveying direction of the adsorption medium (Fig. 11, 90Ö832 / 0330 36. Device according to claim 35. » characterized in that the exhaust air is first passed through a moving bed zone following in the conveying direction of the adsorption medium (e.g. 29a ' ^tx ) and then through one or more preceding moving bed zones (29'',29') of the adsorber moving bed (29a) (Fig. 11 , 14.15). 37. Device according to one of claims 23 to 36 _y, characterized in that in the wall-bed adsorber (29,129) downstream reactivation reactor (I3I) and downstream desorption reactor {J> 1) both reactors through a return line (3 ² O with the adsorber (29,129) are connected to return the regenerated adsorption medium (Fig. 9,10,12,13,15). 38. Device according to claim 37 *, characterized in that that the reactivation reactor (I3I) with a discharge (131a) for burnt solvent and / or desorption. Reactor (3I) is connected to a system (32) for solvent recovery (Fig. 3 to 13) 39. Device according to one of claims 23 to 38, characterized in that the one or more moving bed adsorbers (29) one or more fixed bed adsorbers (35) are connected downstream (Fig. 5, 11). 809882/0330 282813Q 40. Device according to claim 39 *, characterized in that that the or the plague bed adsorbers (35) in the exhaust air stream a heat recovery system (24) is connected downstream (Fig. 11). 41. Apparatus according to claim 39 or 4o, characterized in that the fixed bed adsorber (s) (35)
on the one hand with a mixed gas or smoke gas generator
(36) and on the other hand is connected to a system (37) for solvent recovery (Fig. 11).