DE102012106842A1 - Filter system for use in paint shop for coating workpieces such as vehicle body, has processing device that is provided for processing paint overspray and filter aid material - Google Patents

Abstract

The system has filter device (114) comprising a filter element (120) to separate paint overspray and filter aid material from crude gas. A receptacle (124) receives paint overspray and filter aid material. An extraction device (128) removes portion of paint overspray and filter aid material from receptacle. A processing device (134) is provided for processing the paint overspray and filter aid material.

Description

The present invention relates to a filter system which comprises a filter device for cleaning a crude gas stream laden with paint overspray, wherein the filter device comprises a filter element to which paint overspray can be separated from the raw gas stream laden with paint overspray together with the filter aid material supplied to the raw gas stream. Furthermore, the filter device comprises a receptacle for receiving a system of paint overspray and filter aid material and a removal device for removal of at least part of the system of paint overspray and filter aid material from the receptacle.

In principle, it can be provided in such a filter system that the system of paint overspray and filter aid material is removed and disposed of after a certain period of operation of the filter device from the receptacle and that this filter device for the further operation of the filter system fresh, not loaded with paint overspray filter aid is supplied.

The present invention has for its object to provide a filter system of the type mentioned, by means of which a material-saving, efficient filter operation is feasible.

This object is achieved in that the filter system comprises a processing device for processing the system of paint overspray and filter aid.

For example, a system of paint overspray and filter aid may be a mixture of paint overspray particles and filter aid particles. In particular, a system of paint overspray and filter aid material is formed by conglomerates and / or agglomerates of paint overspray particles, in particular paint droplets, and filter aid material particles, in particular stone meal granules.

For example, a system of paint overspray and filter aid can consist essentially exclusively of agglomerates and / or conglomerates of paint overspray particles and filter aid material particles.

Furthermore, a system of paint overspray and filter aid material can be formed by treated filter aid material, in particular a treated system of paint overspray and filter aid material.

Further, a system of paint overspray and filter aid may be a mixture of fresh (unconsumed) non-paint overspray loaded filter aid, agglomerates and / or conglomerates of paint overspray particles and filter aid particles and / or recycled filter aid.

Due to the fact that the filter system according to the invention comprises a treatment device for conditioning the system of paint overspray and filter aid material, a complete disposal of the system of paint overspray and filter aid material after a single use of the filter aid in a filter device is preferably dispensable. Rather, the system of paint overspray and filter aid material can preferably be fed again as a treated filter aid material to a filter device. As a result, a material-saving and efficient operation of the filter system is possible.

The system of paint overspray and filter aid collects in particular after a cleaning process of the filter element in which, preferably arranged under the filter element, receiving container for filter aid and / or for a system of paint overspray and filter aid material (also called "Filterhilfsmaterialaufnahmebehälter").

The filter system preferably comprises one or more filter devices and / or one or more processing devices.

The filter device preferably comprises one or more filter elements, one or more receptacles and / or one or more removal devices.

In particular, any medium can be used as a filter aid, which is able to absorb a liquid portion of the paint overspray.

In particular, suitable filter aids are, for example, lime, rock flour, in particular limestone flour, aluminum silicates, aluminum oxides, silicon oxides, powder coating or the like.

Alternatively or additionally, as a filter aid for receiving and / or binding the paint overspray particles with a cavity structure and relative to their outer dimensions large inner surface may be used, for example natural and / or synthetic zeolites or other hollow, such as spherical, body of polymers , Glass or aluminum silicate and / or natural or synthetically produced fibers.

Alumina silicates which have the general empirical formula M ^{n +} _{x / n} [(AlO ₂ ) ^x (SiO ₂ ) ^y ] z H ₂ O (M ^{n +} : Metal cation; x / n: stoichiometric factor resulting from the charge of the cation and that of the aluminate anion (= "modulus")). For example, calcium, magnesium, calcium magnesium, sodium and / or potassium zeolites may be used. Preferably, mixtures of two or more of these types of zeolites are used.

Alternatively or additionally, can be used as filter aid for receiving and / or binding the paint overspray and chemically reactive with the overspray particles, such as chemically reactive particles with amine, epoxy, carboxyl, hydroxyl or isocyanate groups, chemically reactive Particles of octylsilane aftertreated alumina or solid or liquid mono-, oligo- or polymers, silanes, silanols or siloxanes.

The filter aid preferably consists of a plurality of filter aid particles, which in particular have a mean diameter in the range of about 10 microns to about 100 microns.

The filter aid material is in particular a flowable, particulate material, which is also referred to as "precoat" material.

The filter aid serves in particular to settle as a barrier layer on the surface of the filter element, in order to prevent this surface from sticking to it by adhering paint overspray particles. By periodically cleaning the filter element, the system of filter aid material and paint overspray passes from the filter element into the receptacle.

In one embodiment of the invention it is provided that the treatment device comprises a thermal treatment device, by means of which the system of paint overspray and filter aid material for the treatment thereof is thermally treated.

A thermal treatment device may in particular be a heating device, by means of which the system of paint overspray and filter aid material can be heated. In particular, by means of a heating device, a liquid fraction in the system of paint overspray and filter aid material can be vaporized.

A thermal treatment device may further be configured as a combustion device. By means of a combustion device, in particular highly volatile, in particular organic, components of the system of paint overspray and filter aid material, for example solvents, can be burned and thus removed from the system of paint overspray and filter aid material. In particular, an oxidative combustion of the system of paint overspray and filter aid material can take place.

It can also be advantageous if a thermal treatment device comprises a pyrolysis device by means of which the system of paint overspray and filter aid material can be pyrolyzed.

It may be favorable if the treatment device comprises a plurality of thermal treatment devices, which preferably have different functions. In particular, it can be provided that liquid constituents of the system consisting of paint overspray and filter aid material are vaporized by means of a thermal treatment device designed as a heating device. By means of a thermal treatment device designed as a combustion device and / or as a post-combustion device, combustion of the combustible constituents of the liquid fraction can then take place, for example. In particular, in this way solvents which are released from the system of paint overspray and filter aid material can be burned and thus made harmless.

It may be advantageous if a thermal treatment device is designed as a cooling device. In particular, the system of paint overspray and filter aid material can be cooled below a glass transition temperature by means of such a cooling device, so that the paint overspray is preferably embrittled.

A thermal treatment device may further be formed as a drying device, by means of which the system of paint overspray and filter aid material for drying it, for example, dry air, which is not saturated and can absorb moisture, can be fed. The air is preferably hot air which, for example, has a temperature of at least about 40 ° C, especially at least about 60 ° C.

In particular, this air can be used, which comes from a workpiece drying device for drying painted workpieces.

In particular, a rotary kiln, a tumble dryer, a screw dryer, a fluidized-bed dryer and / or a current dryer can be used as combustion device, as post-combustion device and / or as heating device.

The supply of the system of paint overspray and filter aid material in the combustion device, the post-combustion device and / or the heater can be done for example via a screw conveyor and / or a vibrating trough.

For example, when using fluidized bed dryers and current dryers, a metering of the system of paint overspray and filter aid material by means of pneumatic conveying, for example by means of a flight promotion, a dense phase promotion and / or a plug conveying done.

Preferably, the combustion device, the post-combustion device and / or the heating device is operated electrically and / or with gas.

In one embodiment of the invention it is provided that the treatment device comprises one or more mechanical treatment devices, by means of which the system of paint overspray and filter aid material for the treatment thereof is mechanically treatable. In particular, it can be provided that in this way agglomerates of paint overspray and filter aid material are broken up.

In particular, it can be provided that a mechanical treatment device is designed as a grinding device, by means of which the system of paint overspray and filter aid material can be ground.

A mechanical treatment device is furthermore preferably a comminution device for comminuting agglomerates of paint overspray and filter aid material.

It may be advantageous if the treatment device comprises a pneumatic treatment device, by means of which the system of paint overspray and filter aid material for the treatment of the same can be acted upon with air.

A pneumatic treatment device may be, for example, a compressed air device by means of which the system of paint overspray and filter aid material for the treatment of the same can be acted upon with compressed air.

Furthermore, a pneumatic treatment device may be a whirling device, by means of which the system of paint overspray and filter aid material can be whirled up. In particular, can be achieved by means of such a whirling device in conjunction with baffles that bounce the fluidized agglomerates of paint overspray and filter aid against each other and against the baffles and are crushed by this.

Furthermore, the system of paint overspray and filter aid material is preferably dryable by means of a pneumatic treatment device. In particular, drying can be effected and / or accelerated by whirling up the system to paint overspray and filter aid material.

By means of the treatment device is preferably a mechanical and / or chemical treatment of the system of paint overspray and filter aid material feasible.

The filter system preferably comprises a storage device for receiving and storing filter aid material and / or a system of paint overspray and filter aid material.

A storage device can be designed, for example, as a silo, in particular as a storage silo, as a storage silo and / or as a mixed silo.

By means of a storage device, a recording and storage of filter aid material and / or a system of paint overspray and filter aid material can take place, in particular outside the receptacle.

In one embodiment of the invention, it is provided that a storage device is a temporary storage device for temporarily storing a processed system of paint overspray and filter aid material. Preferably, the intermediate storage device, the processed system of paint overspray and filter aid material from the processing device can be fed. Furthermore, it can be provided that the processed system of paint overspray and filter aid material for at least one filter device can be provided by means of the intermediate storage device. An advantage of the intermediate storage device is that it allows the irregular emptying of the individual receptacle can be buffered and thus a continuous feed, for example, a rotary kiln with auxiliary material is possible.

It may be advantageous if a storage device is a temporary storage device for temporary storage of a system of paint overspray and filter aid material taken from the receiving container and to be supplied to the processing device. It can be provided that the intermediate storage device, the system of paint overspray and filter aid material from the receptacle is fed. Furthermore, it can be provided that by means of the temporary storage device, the system of paint overspray and Filter auxiliary material for the treatment device is provided.

The system of paint overspray and filter aid, which is to be supplied to the treatment device, is also referred to as a system to be processed from paint overspray and filter aid.

In one embodiment of the invention, it is provided that the filter system comprises a control device and / or a control device, by means of which it can be determined whether the filter auxiliary material provided to the filter device for cleaning the raw gas stream is unloaded, fresh auxiliary material or a system of paint overspray and filter aid material.

In particular, a number of conditioning operations can be detected by means of a control device and / or a control device, so that (too high) accumulation of paint overspray in the filter aid material can be determined and preferably avoided.

In particular, the filter aid material loaded with paint overspray is the system of paint overspray and filter aid material which has been cleaned of at least one filter element.

It may be advantageous if the filter system comprises a mixing device, by means of which unladen, fresh filter aid material and a system of paint overspray and filter aid material are merge and mixable.

In particular, it can be provided that the filter system comprises a mixing device, by means of which unladen, fresh filter aid material and a processed system of paint overspray and filter aid material are merge and mixable.

Alternatively or additionally, it can be provided that the filter system comprises at least one mixing device, by means of which unladen, fresh filter aid material and a non-processed system of paint overspray and filter aid material are merge and miscible.

Furthermore, it can be provided that the filter system, in particular at least one filter device, comprises at least one mixing device (mixing device), by means of which a system of paint overspray and filter aid material can be mixed, so that a substantially homogeneous system is available in which Overspray loaded filter aid particles and unloaded Filterhilfsmaterialpartikel are arranged substantially uniformly distributed.

The filter system preferably comprises a measuring device for measuring the degree of loading, that is the proportion of paint overspray on the system of paint overspray and filter aid material, for example in relation to the total volume and / or the total mass of the system of paint overspray and filter aid.

Preferably, by means of a control device and / or a control device, a mixing ratio for mixing the unloaded fresh filter aid with the system of paint overspray and filter aid, in particular depending on the degree of loading of the filter aid with paint overspray, controlled and / or regulated.

The filter system according to the invention is particularly suitable for use in a paint shop for painting workpieces, in particular vehicle bodies.

• – eine Einhausung, welche eine Rohgaskammer der Filtervorrichtung begrenzt und in welcher mindestens ein Filterelement der Filtervorrichtung angeordnet ist;
• – mindestens einen Einlasskanal zum Einlassen des Rohgasstroms in die Rohgaskammer der Filtervorrichtung; und/oder
• – eine (Filterhilfsmaterial-)Einbringeinrichtung zum Einbringen von Filterhilfsmaterial oder eines Systems (Gemisches) aus Lack-Overspray und Filterhilfsmaterial in den Rohgasstrom.

A paint shop preferably comprises at least one filter device for separating paint overspray from a raw gas stream containing overspray particles (paint overspray), the at least one filter device comprising in particular:

• - An enclosure, which limits a raw gas chamber of the filter device and in which at least one filter element of the filter device is arranged;
• - At least one inlet channel for admitting the raw gas stream into the raw gas chamber of the filter device; and or
• - A (Filterhilfsmaterial-) introduction device for introducing filter aid or a system (mixture) of paint overspray and filter aid in the raw gas stream.

The paint shop preferably has no device for wet deposition of paint overspray.

The (Filterhilfsmaterial-) introduction device preferably comprises at least one processing device (processing device), in particular at least one treatment device, and / or at least one receptacle.

• – eine Lackierkabine, in welcher Werkstücke mit Lack lackierbar sind;
• – eine (Werkstück-)Fördervorrichtung, mittels welcher die zu lackierenden Werkstücke in einer (Werkstück-)Förderrichtung durch die Lackierkabine hindurch förderbar sind;
• – eine Abscheide- und/oder Filteranlage (vereinfachend als "Filteranlage" bezeichnet) zum Reinigen eines die Lackierkabine verlassenden Rohgasstroms, der in der Lackierkabine Lack-Overspray aufgenommen hat, wobei die Filteranlage mindestens eine Filtervorrichtung zum Abtrennen des Lack-Overspray aus dem Rohgasstrom umfasst; und/oder
• – mindestens eine Reingasleitung für einen Reingasstrom, welcher durch Reinigung des Rohgasstroms mittels der mindestens einen Filtervorrichtung erhältlich ist.

Furthermore, the paint shop preferably comprises

• - A paint booth, in which workpieces can be painted with paint;
• A (workpiece) conveying device, by means of which the workpieces to be painted can be conveyed through the painting booth in a (workpiece) conveying direction;
• A separating and / or filtering plant (simply referred to as "filtering plant") for Cleaning a crude gas stream leaving the paint booth, which has received paint overspray in the paint booth, the filter unit comprising at least one filter device for separating the paint overspray from the raw gas stream; and or
• - At least one clean gas line for a clean gas flow, which is obtainable by cleaning the crude gas stream by means of the at least one filter device.

At least one filter device is preferably designed as a regenerable filter device.

A regenerable filter device is a separating device for separating contaminants from a gas stream guided through the paint booth, in particular for separating paint overspray from a gas stream containing overspray particles, in which deposited impurities can be cleaned without having to replace filter elements of the filter device ,

As a regenerable filter device (filter arrangement), in particular, a filter device is provided which has one or more dry filter elements and / or one or more dry separation devices, in which a cleaning of a gas stream takes place substantially without the addition of a liquid to the filter elements. Irrespective of this, subsequent or upstream purification stages can in turn be provided using (under normal conditions) liquid solvents or cleaning agents.

Regardless of the cleaning function of a dry filter element and / or a dry separation device, which takes place without the addition of a liquid, it can be provided that at least one dry filter element and / or at least one dry separation device for cleaning the same, in particular for removing a filter cake from paint overspray and filter aid, with a liquid, in particular a cleaning liquid, are acted upon. A cleaning of at least one dry filter element and / or at least one dry separation device can thus take place wet, while a deposition operation / filter operation preferably takes place dry.

In a regenerable filter device can be provided that the filter device comprises at least one filter element which is provided in the filter operation with a barrier layer and / or a protective layer, which filter aid material, in particular stone meal, preferably limestone, and / or natural and / or synthetic zeolites comprises ,

In this way, it can be prevented in filter operation of the filter device that the filter element is clogged with impurities from the gas stream supplied to the filter device. By cleaning off the barrier layer or protective layer from the filter element of the filter device, a particularly simple regeneration of the filter element can take place, which can subsequently be reused by applying a fresh barrier layer or a fresh protective layer.

As a paint is especially powder coating or fluid paint into consideration.

In contrast to the term "powder coating", the term "fluid paint" refers to a paint having a flowable consistency, from liquid to pasty (for example in the case of a PVC plastisol). The term "fluid paint" includes in particular the terms "liquid paint" and "wet paint".

When using fluid paint, the paint overspray from the paint booth is thus a fluid paint overspray, when using wet paint a wet paint overspray.

The filter system may further comprise at least one sifting device, for example a siphon sifter and / or a ZZ sifter, for separating the fine components of the system of paint overspray and filter aid from the coarser components of the system of paint overspray and Include filter aid. In particular, filter aid material particles which are not loaded with paint overspray (smaller particles) can be separated from agglomerates of paint overspray and filter aid material (larger particles) by means of such a vision device.

A screening device is preferably used to separate the coarse fractions from the fines in, in particular at least partially processed, system of paint overspray and filter aid material.

Furthermore, it can be provided that a sighting device is designed as a Habichter, by means of which uncharged Filterhilfsmaterialpartikel of agglomerates of paint overspray and filter aid material are separable.

• – Zuführen eines mit Lack-Overspray beladenen Rohgasstroms zu einer Filtervorrichtung einer Filteranlage;
• – Einbringen von Filterhilfsmaterial in den Rohgasstrom;
• – Abscheiden eines Systems aus Lack-Overspray und Filterhilfsmaterial und Aufnehmen desselben in einem Aufnahmebehälter.

The present invention further relates to a method for operating a filter system, in particular a filter system according to the invention, comprising the following:

• - Supplying a loaded with paint overspray raw gas stream to a filter device of a filter system;
• - Introducing filter aid in the raw gas stream;
• - Depositing a system of paint overspray and filter aid and recording it in a receptacle.

The present invention is in this respect the task of providing a method for operating a filter system, which can be carried out efficiently with little material.

This object is achieved in that at least part of the system of paint overspray and filter aid material is processed by means of a treatment device.

The method according to the invention preferably has the features and / or advantages described above in connection with the filter system according to the invention.

In one embodiment of the invention, it is provided that the system of paint overspray and filter aid material for the treatment thereof is thermally treated.

In particular, it may be provided that the system of paint overspray and filter aid material for the preparation thereof is dried, fired, incinerated and / or cooled and / or subjected to a pyrolysis process.

For example, the system of paint overspray and filter aid material is heated (heated) by direct contact with a, for example electrical, heater and / or with a burner flame and / or with hot burner exhaust gases. The system of paint overspray and filter aid material is preferably indirectly heated (heated), wherein in particular a partition and / or a heat exchanger is provided between the system on the one hand and the heating device, a heating medium, a burner flame and / or hot burner exhaust gases on the other hand.

It may be favorable if the system of paint overspray and filter aid material for the treatment of the same is supplied with compressed air. In this way, on the one hand, a drying of the system of paint overspray and filter aid material can be achieved. Furthermore, in this way the system of paint overspray and filter aid material can be whirled up. In particular, when the system of paint overspray and filter aid material is accelerated by means of a compressed air device to baffles towards a Aufwirbelung and at the same time a crushing of agglomerates can be achieved.

It may be favorable if a receptacle is provided with at least one pneumatic treatment device. In particular, it can be provided that the pneumatic treatment device comprises at least one air nozzle, for example a Laval nozzle, by means of which air with overpressure (above the normal pressure of 1013 mbar), for example between about 0.1 bar and about 7 bar overpressure, preferably with about 2 bar overpressure, in the system of paint overspray and filter aid material can be introduced.

Preferably, the system of paint overspray and filter aid material is fluidized by the compressed air and crushed due to collisions of the agglomerates with each other and / or walls of the receptacle and / or with baffles.

The pneumatic treatment device may comprise an air compressor. Alternatively or additionally, the pneumatic treatment device can be operated with compressed air.

The air for the pneumatic treatment device is in particular fresh air, which is diverted from a Frischluftzuführvorrichtung a paint shop, in particular from a supply of fresh air for a painting process of the paint shop, and / or, in particular filtered, circulating air or hall air, which is preferably compressed.

Alternatively or additionally, it may be provided that, in particular cleaned, exhaust air from the painting plant is used for the pneumatic treatment device.

A pneumatic treatment device may further comprise a fluidized bed, which is arranged for example in the receptacle. A fluidized bed preferably comprises one or more nozzles, by means of which the Filterhilfsmaterialpartikel or agglomerates of paint overspray and filter aid material on each other and / or against baffles are accelerated to cause a breakup of the agglomerates of paint overspray and filter aid.

At least one nozzle of at least one pneumatic treatment device is preferably arranged so that an air jet generated by means of the nozzle is substantially horizontal in the system is made up of paint overspray and filter aid. Alternatively or additionally, it can be provided that at least one nozzle of at least one pneumatic treatment device is arranged such that at least one air jet is directed vertically or at an angle to the system of paint overspray and filter aid material. In particular, it may be provided that an air jet flows through the system of paint overspray and filter auxiliary material vertically from bottom to top, vertically from top to bottom or diagonally.

It can be advantageous if at least one flow baffle is provided, by means of which the system of paint overspray and filter aid material for extending a pneumatic comminution process (grinding process) can be held in the receptacle before it is fed to the crude gas stream and finally to the filter elements.

Furthermore, it can be provided that at least one pneumatic treatment device comprises at least one nozzle which is arranged so that an air jet is directed perpendicularly or at an angle to a part of a mixing device and / or an (other) mechanical treatment device, so that the mixing device and / or the mechanical treatment device form one or more baffle plates for agglomerates of paint overspray and filter auxiliary material.

In particular, the mixing device and / or the (other) mechanical treatment device is designed so that the system of paint overspray and filter aid material is promoted in the direction of at least one nozzle at least one pneumatic treatment device to the system of paint overspray and filter aid in a through the to be able to bring in at least one nozzle generated airflow.

The process of breaking up agglomerates of paint overspray and filter aid material, for example a mechanical or pneumatic grinding process, can preferably be carried out continuously or clocked.

In one embodiment of the invention, it is provided that the system of paint overspray and filter aid for the preparation of the same at least one processing aid is supplied.

In particular, at least one desiccant, for example silica gel or zeolite, and / or at least one free-flowing assistant, for example sand or limestone flour, can be supplied to the paint overspray and filter aid system. In particular, when using limestone as Rieselhilfsstoff can be provided that an average grain size of the limestone powder used as Rieselhilfsstoff is selected to be greater than an average grain size of the filter aid, which is also formed, for example, from limestone.

It can be advantageous if at least two method steps, in particular at least two mutually different method steps, are carried out for the preparation of the system of paint overspray and filter aid material.

It may be favorable if at least two method steps for conditioning the system of paint overspray and filter aid material are carried out in chronological succession.

Alternatively or additionally, it can be provided that at least two method steps for conditioning the system of paint overspray and filter aid material are carried out substantially simultaneously and / or overlapping in time.

At least part of the system of paint overspray and filter aid material is preferably removed from the receptacle and processed outside of the receptacle.

In particular, the removed and processed part of the system of paint overspray and filter aid material is fed again as filter aid material of the filter device, in particular reintroduced into the raw gas stream.

Alternatively or additionally, it can be provided that at least part of the system of paint overspray and filter aid material is processed in the receptacle. A removal and refeeding of the system of paint overspray and filter aid material is then preferably dispensable or can be at least delayed.

In principle it can be provided that at least a part of the system of paint overspray and filter aid material after removal from the receptacle, after the preparation by means of the processing device and / or before being supplied to the at least one filter device by means of a storage device, in particular by means of a buffer device, stored, in particular cached, is. In this way, a large amount of filter aid, especially on recycled filter aid, always available.

Alternatively or additionally, it can be provided that at least part of the system of paint overspray and filter auxiliary material is removed from the receiving container, processed and returned to the receiving container, while no filter operation is carried out in the filter device is, for example, during a cleaning operation of the filter device. External storage of the system of paint overspray and filter aid material is then preferably dispensable.

Preferably, the system of paint overspray and filter aid material in the receptacle during normal operation of the filter system is replaced.

In particular, in this case can be dispensed with an intermediate storage device, if within a time of, for example, about two to about three minutes at least a part of the system of paint overspray and filter aid material removed from the receptacle and the processing device is supplied. Preferably, the treatment is also carried out within this time and the processed system of paint overspray and filter aid immediately returned to the same receptacle. In the paint shop can preferably continue to be painted without hindrance, the short time can be intercepted without or with only a small amount of filter aid from the process itself. In particular, cleaning of the crude gas stream laden with paint overspray on the filter elements can still take place within this short period of time since, despite a cleaning thereof, they still preferably have a thin layer of filter aid material.

The inventive method for operating a filter system is particularly suitable for carrying out in a method for operating a paint shop.

• – Fördern von Werkstücken in einer (Werkstück-)Förderrichtung durch die Lackierkabine mittels einer (Werkstück-)Fördervorrichtung und Lackieren der Werkstücke in der Lackierkabine;
• – Zuführen eines Rohgasstroms aus der Lackierkabine der Lackieranlage, welcher Lack-Overspray in der Lackierkabine aufgenommen hat, zu einer Filteranlage, insbesondere einer erfindungsgemäßen Filteranlage;
• – Abtrennen von Lack-Overspray aus dem mit Overspraypartikeln beladenen Rohgasstrom mittels mindestens einer Filtervorrichtung der Filteranlage, so dass ein Reingasstrom erhalten wird, wobei mittels mindestens einer (Filterhilfsmaterial-)Einbringeinrichtung, insbesondere mittels einer Behandlungsvorrichtung zum mechanischen Behandeln von Filterhilfsmaterial und/oder eines Systems aus Filterhilfsmaterial und Overspraypartikeln (Lack-Overspray), Filterhilfsmaterial und/oder ein System aus Lack-Overspray und Filterhilfsmaterial aufgelockert wird.

The method for operating a paint shop preferably comprises the following method steps:

• - conveying workpieces in a (workpiece) conveying direction through the painting booth by means of a (workpiece) conveying device and painting the workpieces in the painting booth;
• - Supplying a raw gas stream from the spray booth of the paint shop, which has received paint overspray in the spray booth, to a filter system, in particular a filter system according to the invention;
• Separating paint overspray from the raw gas stream laden with overspray particles by means of at least one filter device, so that a clean gas stream is obtained, wherein at least one (filter aid material) introduction device, in particular by means of a treatment device for the mechanical treatment of filter aid material and / or a system from filter aid material and overspray particles (paint overspray), filter aid material and / or a system of paint overspray and filter aid material is loosened.

The method for operating a painting installation preferably has the features and / or advantages described above in connection with the filter installation, the painting installation and / or the method for operating a filter installation.

Furthermore, the filter system, the paint shop, the method for operating a filter system and / or the method for operating a paint shop may have the features and / or advantages described below:
Preferably, when emptying a filter device, the system of paint overspray and filter aid is not stored in a storage device (silo) for final use, but by means of a suitable processing device, in particular a grinding device (mill), ground again to a mean grain size, at least approximately the middle Grain size of unloaded, fresh filter aid corresponds.

Preferably, at least two storage devices (silos) are provided, between which (with respect to a conveying direction of the system of paint overspray and filter aid material) at least one processing device is arranged. By means of at least one storage device, in particular a high demand for filter aid material can be buffered at peak times. Furthermore, this longer treatment times, such as meals, can be compensated, so that a total time for the removal of at least part of the system of paint overspray and filter aid material from the receptacle to the renewed supply of fresh or processed filter aid material to the filter device is substantially constant or at least a predetermined duration is not exceeded.

The filter system preferably comprises at least one (Filterhilfsmaterial-) conveyor, by means of which filter aid material and / or the system of paint overspray and filter aid material between the individual components of the filter system can be conveyed. In particular, by means of the conveying device, filter aid material and / or a system of paint overspray and filter aid material can be conveyed from at least one storage device to at least one filter device, from at least one filter device to the processing device and / or vice versa.

By means of a control device and / or a control device is preferably monitored whether a filter device fresh Filter auxiliary material or already used or used multiple times and recycled filter aid was supplied. For this purpose, in particular electronic markers can be used.

In particular, in the multiple treatment of the system of paint overspray and filter aid there is a risk that a proportion of organic constituents, in particular solvents, concentrated in the system of paint overspray and filter aid. The system of paint overspray and filter aid material can thereby become combustible or (dust) explosive. The number of processing operations and / or the return to the at least one filter device is therefore preferably monitored, so that a predetermined limit concentration of hazardous substances is not exceeded.

The risk of accumulation of combustible or explosive constituents in the system of paint overspray and filter aid material can be reduced, in particular, by conditioning the system of paint overspray and filter aid material by means of a thermal treatment device.

Depending on a selected temperature range in the thermal treatment, a different treatment of the system of paint overspray and filter aid material can take place. For example, solvent at a temperature of at most about 100 ° C can simply be evaporated from the system. This can be done in particular in a mechanical treatment device, for example in a grinding device, by heating the entire grinding device and / or by supplying heated air to the grinding device. In particular, it can be provided that the heating of the grinding device takes place by friction in the grinding device in the preparation of the system of paint overspray and filter aid, so that no additional heat input is necessary to the system of paint overspray and filter aid material to the for the evaporation of Solvents necessary temperature to heat. To achieve a desired temperature, a corresponding meal can be set. Furthermore, by setting the meal, a grinding degree can be set, whereby a longer meal leads to a smaller grain size (up to the construction-related lower limit of the grinding tool).

Preferably, in a temperature range between about 100 ° C and about 180 ° C, a level of paint in the system can cure from paint overspray and filter aid. The air preferably to be supplied for this purpose can originate in particular from other parts of the system of the filter system or the paint shop. For example, exhaust air from a dryer (workpiece drying device) can be used for painted workpieces. The heating of the system of paint overspray and filter aid material to the temperature necessary for curing the paint portion is preferably carried out in an intermediate step before the mechanical treatment by means of the mechanical treatment device, in particular before grinding by means of the grinding device.

In a temperature range above about 400 ° C, a thermal treatment of the paint overspray and filter aid system can be accomplished by incinerating an organic fraction in the paint overspray and filter aid system. In particular, a rotary kiln or the like can be provided for this purpose, to which the system of paint overspray and filter auxiliary material can be fed.

Alternatively or additionally, it may be provided that the system of paint overspray and filter aid material is cooled by means of a thermal treatment device designed as a cooling device. In particular, by means of such a cooling device, the (previously heated) system of paint overspray and filter aid material can be cooled to the (optimum) temperature necessary for the operation of the grinding device.

In one embodiment of the invention, it is provided that a mechanical treatment device is designed as a supply device for supplying the system of paint overspray and filter aid material to a combustion device, so that when supplying the system of paint overspray and filter aid to the combustion device, a mechanical treatment , For example, a Aufmahlvorgang, is feasible.

It may be favorable if the air required for the operation of a rotary kiln is the exhaust air of a drier (workpiece drying device) for drying painted workpieces, which is heated to reach the temperature necessary for the operation of the rotary kiln. The exhaust air from the rotary kiln is preferably fed together with the combustion products as (partial) air flow of a thermal afterburner of the paint shop.

The exhaust air of the rotary kiln is preferably not hotter in the process of possible paint loading of the filter aid, as it is required for the thermal afterburning. But on the one hand, the partial air flow is hotter than the supply air flow in the thermal afterburning, so that thereby fuel can be saved. On the other hand, this achieves a fuel saving that the Rotary kiln - within certain limits - can be operated autothermally, so that no longer has to be heated so much by the released combustion energy to keep the rotary kiln at temperature.

It may be advantageous to additionally cool, so that the conversion of contained in the filter aid calcium carbonate (CaCo ₃ ) in calcium oxide (CaO) is prevented.

Alternatively or additionally, it can be provided that for heating the rotary kiln, a partial air flow of the dryer exhaust air is used after passing through the thermal afterburning. The exhaust air of the rotary kiln is then preferably returned as a partial air flow to the thermal afterburning.

A trained as a rotary kiln combustion device can be operated, for example, in countercurrent principle. For this purpose, hot process air is preferably introduced on the side in an interior of the rotary kiln, at which thermally treated system of paint overspray and filter aid material, in particular processed stone powder, is removed from the interior of the rotary kiln. The system of paint overspray and filter aid material to be reprocessed is accordingly introduced into the interior of the rotary kiln on a side of the rotary kiln opposite this side. Such a rotary kiln can provide the advantage that the system of paint overspray and filter aid material when introducing the same into the interior of the rotary kiln directly with the hot process gas, that is, with the heated process gas in the rotary kiln, in contact. The rotary kiln can therefore be made shorter, preferably.

Alternatively or additionally, it can be provided that a combustion device is designed as a rotary kiln, which is operated in a DC principle. The process air and the system of paint overspray and filter aid material are introduced from the same side into the interior of the rotary kiln. The rotary kiln may in this case have a greater length. Preferably, forming condensates can be kept longer in the hot process gas, so that the probability is increased that these condensates are also burned. The amount of tarry residues which form can thereby preferably be reduced.

It can be advantageous if a rotary kiln comprises at least one heating zone, preferably two or more heating zones, in particular four heating zones. In different heating zones preferably different temperatures prevail. For example, it may be provided that a temperature is kept lower in a first heating zone than in at least one subsequent further heating zone in order to expel volatile components first.

These volatiles are preferably readily completely burned to carbon dioxide.

It can be provided that the system of paint overspray and filter aid material, in particular the processed system of paint overspray and filter aid, such as processed stone powder, is removed from the same at the end of the rotary kiln.

However, it may be advantageous if the system of paint overspray and filter aid material, in particular the processed system of paint overspray and filter aid material, for example, the processed stone powder, taken between two heating zones from the rotary kiln, in particular discharged. For this purpose, for example, a removal device may be provided.

The process gas preferably remains in the rotary kiln and can be burned as completely as possible in the other heating zones. A heating of pipelines to the final burning of the evaporated and / or partially burned organics can thereby be preferably avoided.

By separating the system of paint overspray and filter auxiliary material from the rotary kiln, a separation between the process exhaust gases and the processed system of paint overspray and filter auxiliary material can be optimized.

It may be provided that at least one heating zone, which is arranged downstream of a removal device for discharging the processed system of paint overspray and filter aid with respect to a conveying direction of the system of paint overspray and filter aid, has a higher temperature than at least one arranged in front of the removal device heating zone. As a result, a higher temperature can be set in sections in the rotary kiln, without any fear that the filter aid itself will be chemically reacted. For example, a temperature in the rotary kiln can be increased in sections to about 700 ° C. An additional thermal afterburning is then preferably unnecessary.

The temperature in the rotary kiln is preferably chosen so that the filter aid is not affected thermally, but the organic components of the system of paint overspray and filter aid preferably completely burned. Depending on the filter aid used, for example, calcium carbonate (CaCO ₃ ), zeolites or aluminum oxide (Al ₂ O ₃ ), a temperature in the interior of the rotary kiln is adjusted accordingly.

A paint component in the system of paint overspray and filter aid material is preferably brought by cooling to a temperature below a glass transition temperature of the paint overspray, so that the paint component becomes brittle and easier to grind. For this purpose, the system of paint overspray and filter aid material may be cooled before the system of paint overspray and filter aid material is introduced into a mechanical treatment apparatus, in particular into a grinding apparatus. Alternatively or additionally, it can be provided that the system of paint overspray and filter aid in the mechanical treatment device, in particular in the grinding device, is cooled down to the temperature below the glass transition temperature of the paint.

It may be favorable if the system of paint overspray and filter aid material is subjected to a pyrolysis process. As a result, binder components in the system of paint overspray and filter aid material can be removed and / or converted, so that preferably the pure filter aid material remains, which is then particularly preferably present in its original mean particle size.

In one embodiment of the invention can be provided that several grinding steps are performed sequentially. Thus, for example, be provided that a certain amount of filter aid material initially supplied to the filter device, there applied with paint overspray, then processed, in particular ground, then fed again to the filter device, there applied with further paint overspray and finally ground again, etc Preferably, the filter aid material is used until it has a predetermined paint content (paint content) and / or energy content. In a subsequent step, a pyrolysis process is preferably carried out. The pyrolysis process can thereby be carried out with a small amount of additional energy to be supplied. The amount of filter aid used in the at least one filter device and to be pyrolyzed is thereby preferably reduced. Optionally, after the implementation of the pyrolysis process, an additional mechanical treatment process, for example a grinding operation by means of a grinding device, can be carried out.

Preferably, the exhaust air is supplied from a thermal treatment device of an exhaust air purification device of the filter system or the paint shop.

In particular, when in the filter device existing filter aid material is loosened up in the receptacle by means of an agitator or a paddle mixer, it can be provided that elements for grinding the filter aid are integrated into the agitator or the paddle mixer. For example, grinding disks can be mounted on a shaft of the agitator or the paddle mixer, or a ball mill can be integrated in the shaft. Furthermore, it can be provided that at least part of the shaft of the agitator or the paddle mixer is designed as a pin mill.

A mixing of unladen filter aid material and with paint overspray loaded filter aid is preferably carried out in a storage device (silo, mixed silo, which includes a mixing device, for example, is provided with mixing tools) and / or by means of at least two metering, which, for example, controlled or regulated, unloaded and combine loaded filter aid in a (predetermined) ratio and mix.

A mechanical treatment device may, for example, comprise grinding balls which can be set in motion by means of an agitator, for example in a receptacle. The movement of the grinding balls can then lead to breakup of agglomerates of paint overspray and filter aid material, even at very low speed reliable grinding of the agglomerates can be guaranteed because the residence time of the filter aid in the receptacle is very long (several hours to several days ). The filter aid material is thereby ground permanently preferably in filter operation of the filter device and thus kept so fine even without a removal and external processing that constantly fresh paint overspray is receivable, ideally up to the physical acceptance limit (literature value for the moisture absorption: about 27% w / w (percentage by mass of the absorbed substance based on the total mass of the unloaded filter aid)). By means of a grid at a removal opening (suction nozzle) of the receptacle can be prevented from being removed from the receptacle by mistake when the system of filter aid material and paint overspray is removed.

Preferably, the treatment device, in particular at least one mechanical treatment device of the Conditioning device, the reduction of the mean grain size of the system of paint overspray and filter aid to a value below about 100 microns, preferably below about 50 microns, especially below about 30 microns, for example below about 10 microns.

Further features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

In the drawings show:

1 a schematic vertical cross section through a paint shop for painting workpieces;

2 a schematic representation of a first embodiment of a filter system of the paint shop 1 wherein the filter system comprises a treatment device for the preparation of a filter aid, which is designed as a grinding device;

3 one of the 2 corresponding schematic representation of a second embodiment of a filter system, in which two temporary storage devices are provided for the intermediate storage of filter aid material;

4 one of the 2 corresponding schematic representation of a third embodiment of a filter system in which a mixing device for mixing fresh filter aid material is provided with loaded with paint overspray filter aid material;

5 one of the 2 corresponding schematic representation of a fourth embodiment of a filter system, in which the treatment device comprises a thermal treatment device for heating to be processed filter auxiliary material;

6 one of the 2 corresponding schematic representation of a fifth embodiment of a filter system in which the heated filter auxiliary material heated air from a workpiece drying device for drying painted workpieces can be fed;

7 one of the 2 corresponding schematic representation of a sixth embodiment of a filter system in which a treatment device is provided which comprises a combustion device;

8th one of the 2 corresponding schematic representation of a seventh embodiment of a filter system in which the treatment device comprises a combustion device and a Nachverbrennungsvorrichtung, wherein the combustion device exhaust air from a workpiece drying device for drying painted workpieces can be fed;

9 one of the 2 corresponding schematic representation of an eighth embodiment of a filter system, wherein the treatment device comprises a combustion device and a Nachverbrennungsvorrichtung, wherein the combustion device exhaust air from the Nachverbrennungsvorrichtung can be fed;

10 one of the 2 corresponding schematic representation of a ninth embodiment of a filter system in which the treatment device comprises a designed as a cooling device thermal treatment device;

11 a schematic representation of a counter-current operated rotary kiln;

12 a schematic representation of a operated in the DC principle rotary kiln; and

13 a schematic representation of a rotary kiln, which comprises a plurality of heating zones and a removal device.

Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

An in 1 shown as a whole with 100 designated paint shop includes a paint booth 102 in which workpieces 104 , For example, vehicle bodies, can be applied with paint (paintable).

The workpieces 104 are for this purpose by means of a workpiece conveyor 108 an application area 106 the paint booth 102 can be fed in and removed again.

The paint shop 100 further includes an over the paint booth 102 arranged plenum 110 , by means of which the application area 106 in the paint booth 102 Air can be supplied.

Furthermore, the paint shop includes 100 one under the spray booth 102 arranged filter system 112 , by which the through the Applizierbereich 106 Guided air, which by applying paint on the workpieces 104 Paint overspray has picked up, can be cleaned.

The filter system 112 includes several filter devices 114 ,

Every filter device 114 includes an enclosure 116 , which is a raw gas chamber 118 limited and in which at least one filter element 120 is arranged.

Furthermore, the filter device comprises 114 an inlet channel 122 through which a stream of raw gas passing through the through the Applizierbereich 106 guided, with paint overspray acted upon air is formed in the raw gas chamber 118 the filter device 114 can flow in.

The filter device 114 is formed as a dry filter device, that is, that a purification of the raw gas stream substantially without the addition of a liquid to the filter elements 120 he follows. Rather, a filter auxiliary material can be supplied to the raw gas stream, which preferably absorbs a liquid fraction in the paint overspray and together with the paint overspray on the filter element 120 can be deposited. As a result, a clean gas flow is obtained, which the filter device 114 through a clean gas line 123 leaves.

By depositing the system of paint overspray and filter aid material on the filter elements 120 a barrier layer or a protective layer is formed, which is easily removed from the filter elements 120 can be cleaned.

The filter device 114 is thus a regenerable filter device 114 which without an exchange of filter elements 120 regenerated and reused.

That of the filter elements 120 Cleaned system of filter aid and paint overspray can be stored in a receptacle 124 the filter device 114 , which under the filter element 120 is arranged to be recorded.

A mixing device 127 serves to mix the system of paint overspray and filter aid in the receptacle 124 ,

A filter aid introduction device 126 is for example through the mixing device 127 in the receptacle 124 formed and serves the introduction of filter aid material in the through the raw gas chamber 118 flowing crude gas stream.

By means of a removal device 128 can that in the receptacle 124 arranged system of paint overspray and filter aid from the receptacle 124 be removed.

By means of a feeder 130 can filter device fresh or recycled filter aid 114 be supplied.

The removal device 128 and the feeder 130 are part of a conveyor 132 for the promotion of filter aid material and / or a system of paint overspray and filter aid material.

In filter operation of the filter system 112 This will be the case in the filter devices 114 arranged filter aid over time increasingly contaminated with paint overspray. As a result, the ability of the filter aid to bind further paint overspray and thus a permanent contamination of the filter elements 120 to avoid being affected.

At regular intervals, therefore, must be in the filter devices 114 arranged filter aid material can be replaced by fresh auxiliary material.

In principle, however, can also be a preparation of the filter aid, so that the already one or more times used filter aid at least partially again as treated filter aid in the filter system 112 can be used.

This includes the filter system 112 a treatment device 134 , by means of which the system can be prepared from paint overspray and filter aid material.

The processing device 134 in particular comprises at least one comminuting device 136 , by means of which agglomerates of paint overspray and filter aid material can be broken, so that the average grain size of the system of paint overspray and filter aid material can be reduced.

The processing device 134 preferably comprises at least one thermal treatment device 140 , at least one mechanical treatment device 160 and / or at least one pneumatic treatment device 170 ,

A thermal treatment device 140 For example, as a heater 142 as a cooling device 144 , as a combustion device 146 , as a pyrolysis device 148 and / or as an afterburner 150 be educated. A combustion device 146 is for example a rotary kiln 152 ,

A mechanical treatment device 160 For example, a mechanical grinding device 162 be. In particular, a grinder 162 a mill 164 be by means of which the system of paint overspray and filter aid material can be ground to reduce the average grain size.

A pneumatic treatment device 170 in particular, a pneumatic grinding device 172 , a whirling device 174 and / or a compressed air device 176 be. In particular, by means of a pneumatic treatment device 170 The system of paint overspray and filter aid material whirled up and thereby crushed and / or by the raw gas chamber 118 the filter device 114 be fed supplied crude gas stream. At least one pneumatic treatment device 170 For this purpose, it is preferably in the filter device 114 , in particular in the receptacle 124 arranged.

In principle it can be provided that a conditioning of the system of paint overspray and filter aid material in at least one filter device 114 , in particular in at least one receptacle 124 , he follows. For example, it may be provided that at least one mechanical treatment device 160 and / or at least one pneumatic treatment device 170 for conditioning the system of paint overspray and filter aid material in the filter device 114 , in particular in the receptacle 124 , is arranged.

It is preferably provided that by means of the treatment device 134 a preparation of the system of paint overspray and filter aid material outside at least one filter device 114 is feasible.

In particular, the system of paint overspray and filter auxiliary material for this purpose by means of the conveyor 132 from the filter devices 114 to the treatment device 134 and back promoted.

In the 1 illustrated paint shop 100 works as follows:
In the application area 106 the paint booth 102 the paint shop 100 becomes a workpiece 104 painted, which passes through the paint booth 102 flowing air is subjected to paint overspray.

The laden with paint overspray air is as the raw gas stream of the filter system 112 fed.

About the inlet channels 122 the raw gas stream is in the raw gas chambers 118 the filter devices 114 the filter system 112 guided. By means of filter aid introduction devices 126 filter aid material is introduced into the raw gas stream.

The paint overspray from the raw gas stream is deposited on the filter aid material and / or on a protective layer of filter aid material on the at least one filter element 120 each filter device 114 and is thereby separated from the raw gas stream.

The thus purified gas stream then leaves the filter device 114 as pure gas flow over the clean gas line 123 ,

The addition of paint overspray to the filter aid material, the function of the filter aid with continuous filter operation of the filter devices 114 increasingly impaired, so that the filter aid must be replaced or prepared at regular intervals.

At the in 1 illustrated embodiment of the paint shop 100 This is generally a treatment device 134 provided, which in the receptacle 124 arranged system of paint overspray and filter aid material by means of the conveyor 132 can be fed.

In the treatment device 134 In particular, an average grain size of the system of paint overspray and filter aid material is reduced by breaking up agglomerates of paint overspray and filter aid material.

The processed system of paint overspray and filter aid material can then be processed as a filter aid by means of the conveyor 132 again the filter devices 114 be supplied.

For controlling and / or regulating the filter system 112 , in particular the processing device 134 , is at least one control device 175 and / or at least one control device 177 intended.

In 1 is the filter system 112 with a not specified concrete processing device 134 for a general description of how the filter system works 112 shown.

In the following 2 to 10 are individual embodiments of filter systems 112 with different treatment devices 134 shown.

An in 2 illustrated first embodiment of a filter system 112 includes next to the filter devices 114 and the conveyor 132 two storage devices 180 in which filter aid material and / or a system of paint overspray and filter aid material can be received and stored.

The conveyor 132 uses air as a transport medium for driving (conveying) the filter aid and the system of paint overspray and filter aid, the air by means of separators 179 is separable to deposit the filter aid and the system of paint overspray and filter aid at a desired location.

One of the storage devices 180 is used to hold fresh, not with paint overspray loaded filter aid, while the other storage device 180 the inclusion of loaded with paint overspray, no longer intended for processing and thus to be disposed of filter aid is used.

transporters 181 , For example, trucks, serve the supply of fresh filter aid and / or the removal of filter aid to be disposed of.

The processing device 134 includes at the in 2 shown first embodiment of the filter system 112 one as a grinding device 162 trained mechanical treatment device 160 , which by means of the conveyor 132 the system of paint overspray and filter aid material from the filter devices 114 can be fed.

By means of the grinding device 162 The system can be ground from paint overspray and filter aid and by means of the conveyor 132 again the filter devices 114 be supplied.

Incidentally, the in 2 illustrated first embodiment of the filter system 112 in terms of structure and function with the generally in 1 described filter system 112 so that reference is made to the above description in this respect.

An in 3 illustrated second embodiment of a filter system 112 is different from the one in 2 shown first embodiment essentially in that with respect to a conveying direction 182 the system of paint overspray and filter aid before and after the treatment device 134 in each case an intermediate storage device 184 is provided for caching the system of paint overspray and filter aid material.

The with respect to the conveying direction 182 before the treatment device 134 arranged intermediate storage device 184 serves for the intermediate storage of still to be processed system of paint overspray and filter aid material.

The with respect to the conveying direction 182 behind the processing device 134 arranged intermediate storage device 184 serves to accommodate the means of the treatment device 134 prepared system of paint overspray and filter aid material.

Incidentally, the in 3 illustrated second embodiment of the filter system 112 in terms of structure and function with the in 2 illustrated first embodiment, so that reference is made to the above description in this respect.

An in 4 illustrated third embodiment of a filter system 112 is different from the one in 2 illustrated first embodiment essentially in that the processing device 134 as a mixing device 186 is trained.

By means of the mixing device 186 This can be done from the filter devices 114 Removed system of paint overspray and filter aid with fresh, unladen filter aid from the storage device 180 be mixed so that a reusable system of paint overspray and filter aid material, that is a treated system of paint overspray and filter aid material, can be obtained.

Preferably, the mixing device comprises 186 a measuring device 188 , By means of which it can be determined how much the filter aid material is loaded with paint overspray. In this way it can be determined to what extent the system of paint overspray and filter aid fresh, unladen filter aid must be added to the filter function of the filter aid when re-feeding to the filter device 114 to ensure.

For controlling and / or regulating the mixing device 186 , in particular as a function of by means of the measuring device 188 determined values, serve the control device 175 and / or the control device 177 ,

Incidentally, the in 4 illustrated third embodiment of the filter system 112 in terms of structure and function with the in 2 illustrated first embodiment, so that reference is made to the above description in this respect.

An in 5 illustrated fourth embodiment of a filter system 112 is different from the one in 2 illustrated first embodiment essentially in that the processing device 134 a mechanical one treatment device 160 comprising, which with a thermal treatment device 140 is provided.

The thermal treatment device 140 is doing as a heater 142 formed and serves to heat the in the mechanical treatment device 160 arranged system of paint overspray and filter aid.

The system of paint overspray and filter aid can by means of the heater 142 in particular to a temperature between about 50 ° C and about 100 ° C are heated. As a result, solvents present in the paint overspray and filter aid system system can be vaporized (evaporated).

Further, by means of the heater 142 heating the system of paint overspray and filter aid to a temperature between about 100 ° C and about 180 ° C. As a result, the paint overspray can be cured, so that the system of paint overspray and filter aid material by means of the mechanical treatment device 160 easier to grind up.

Incidentally, the in 5 illustrated fourth embodiment of the filter system 112 in terms of structure and function with the in 2 illustrated first embodiment, so that reference is made to the above description in this respect.

An in 6 illustrated fifth embodiment of a filter system 112 is different from the one in 5 illustrated fourth embodiment essentially in that the processing device 134 a mechanical treatment device 160 comprising which exhaust air from a workpiece drying device 190 for drying painted workpieces 104 can be fed.

The processing device 134 thus comprises a pneumatic treatment device 170 , By means of which the system of paint overspray and filter aid material with air, in particular with warm air, can be acted upon.

By means of the exhaust air from the workpiece drying device 190 In particular, a paint component in the system of paint overspray and Filterhilfsmaterial be dried so that a simpler mechanical treatment of the system of paint overspray and filter aid, for example by grinding the system of paint overspray and filter aid material by means of a grinding device 162 trained mechanical treatment device 160 , is possible.

Incidentally, the in 6 illustrated fifth embodiment of a filter system 112 in terms of structure and function with the in 5 illustrated fourth embodiment, so that reference is made to the above description in this respect.

An in 7 illustrated sixth embodiment of a filter system 112 is different from the one in 2 shown first embodiment of a filter system 112 essentially in that with respect to the conveying direction 182 before the mechanical treatment device 160 a as a combustion device 146 For example, as a rotary kiln 152 , trained thermal treatment device 140 is provided.

The thermal treatment device 140 The system may consist of paint overspray and filter aid material from the filter devices 114 be supplied to burn an organic content in the system of paint overspray and filter aid. In particular, when the thermal treatment device 140 as a rotary kiln 152 is formed, by means of the thermal treatment device 140 on the one hand a treatment of the system of paint overspray and filter aid material and at the same time a promotion of the system of paint overspray and filter aid material, in particular a promotion to the mechanical treatment device 160 out, done.

Incidentally, the in 7 illustrated sixth embodiment of a filter system 112 in terms of structure and function with the in 2 illustrated first embodiment, so that reference is made to the above description in this respect.

An in 8th illustrated seventh embodiment of a filter system 112 is different from the one in 7 illustrated sixth embodiment substantially in that the processing device 134 in addition to the mechanical treatment device 160 and as a combustion device 146 trained thermal treatment device 140 as a post-combustion device 150 trained thermal treatment device 140 includes.

The afterburner 150 serves the afterburning of exhaust air, in particular the exhaust air from the as a combustion device 146 trained thermal treatment device 140 ,

The post-combustion device 140 is thus not the system of paint overspray and filter aid material, but only the exhaust air from the as a rotary kiln 152 trained combustion device 146 fed.

The for the operation of the rotary kiln 152 trained combustion device 146 required air is at the in 8th illustrated seventh embodiment of the filter system 112 from a workpiece drying device 190 for drying painted workpieces 104 provided.

At the in 8th illustrated seventh embodiment of the filter system 112 thus results in an air flow from the workpiece drying device 190 to the as a combustion device 146 trained thermal treatment device 140 and finally to the post-combustion device 150 trained thermal treatment device 140 , Such an air guide has the advantage that for the operation of the thermal treatment device 140 required temperatures can be achieved easily and with little additional energy input. As a result, fuel, for example gas, in particular natural gas, for the operation of the thermal treatment device 140 be saved.

Incidentally, the in 8th illustrated seventh embodiment of the filter system 112 in terms of structure and function with the in 7 illustrated sixth embodiment, so that reference is made to the above description thereof in this regard.

An in 9 illustrated eighth embodiment of a filter system 112 is different from the one in 8th shown seventh embodiment substantially in that the combustion device 146 supplied air not from a workpiece drying device 190 but that this exhaust from the post-combustion device 150 trained thermal treatment device 140 is used. In this way, a circulation of the air flow (or at least part of the air flow) through the combustion device 146 and the post-combustion device 150 will be realized.

Incidentally, the in 9 illustrated eighth embodiment of a filter system 112 in terms of structure and function with the in 8th illustrated seventh embodiment, so that reference is made to the above description in this respect.

An in 10 illustrated ninth embodiment of a filter system 112 is different from the one in 2 illustrated first embodiment essentially in that the processing device 134 in addition to the mechanical treatment device 160 one as a cooling device 144 trained thermal treatment device 140 includes.

The cooling device 144 is preferably with respect to the conveying direction 182 of the system of paint overspray and filter aid material in front of the mechanical treatment device 160 arranged.

By means of the cooling device 144 The system can be cooled from paint overspray and filter aid. In particular, the system of paint overspray and filter aid material by means of the cooling device 144 cooled down to a temperature which is below a glass transition temperature of the paint overspray. For example, the system of paint overspray and filter aid may be cooled down to a temperature of about 5 ° C.

The cooling of the system of paint overspray and Filterhilfsmaterial causes the proportion of paint in the system embrittled and thereby easier machined, especially easier ground, can be.

In a further (not shown) embodiment of a filter system 112 can be provided that the cooling of the system of paint overspray and filter aid not upstream of the mechanical treatment device 160 but in the mechanical treatment device 160 he follows.

Incidentally, the in 10 illustrated ninth embodiment of a filter system 112 in terms of structure and function with the in 2 illustrated first embodiment, so that reference is made to the above description in this respect.

In the 11 to 13 are different embodiments of combustion devices 146 shown. In particular, the combustion device 146 rotary kilns 152 ,

At the in 11 illustrated embodiment, it is provided that the rotary kiln 152 a heating zone 192 for heating an interior 194 of the rotary kiln 152 having.

The rotary kiln 152 can be operated in countercurrent principle, that is, that the system of paint overspray and filter aid material in a conveying direction 182 through the interior 194 of the rotary kiln 152 which is a gas conveying direction 196 , in which a gas, in particular process gas, through the interior 194 of the rotary kiln 152 is opposed.

The rotary kiln 152 This can be made particularly short, as that in the interior 194 of the rotary kiln 152 introduced system of paint overspray and filter aid directly at the entrance to the interior 194 with hot gas, in particular process gas, comes into contact and thus processed faster.

An in 12 illustrated second embodiment of a rotary kiln 152 trained combustion device 146 is different from the one in 11 illustrated embodiment essentially in that the gas conveying direction 196 and the conveying direction 182 the system of paint overspray and filter aid are aligned parallel and in the same direction to each other. The in 12 illustrated rotary kiln 152 is thus operated in DC mode.

As a result, forming condensates can preferably be kept longer in the hot process gas, so that the probability is greater that they are also fully implemented. The amount of tarry residues which form can thereby preferably be reduced.

Incidentally, the in 12 illustrated embodiment of the rotary kiln 152 in terms of structure and function with the in 11 illustrated embodiment, so that reference is made to the above description in this respect.

An in 13 illustrated third embodiment of a rotary kiln 152 trained combustion device 146 is different from the one in 12 illustrated embodiment essentially in that instead of a single heating zone 192 several, especially four, heating zones 192 are provided.

Regarding the gas conveying direction 196 and the conveying direction 182 the system of paint overspray and filter aid, which are aligned parallel and in the same direction to each other, are the heating zones 192a . 192b . 192c and 192d arranged consecutively.

In the 13 illustrated embodiment of the rotary kiln 152 differs further from the in 12 illustrated embodiment in that the system of paint overspray and filter aid material, in particular the processed filter aid material, not at one end of the rotary kiln 152 is taken from the same. Rather, a removal device 198 provided by means of which the system of paint overspray and filter aid material between two heating zones 192 , in particular between the heating zone 192b and the heating zone 192c , can be taken.

Such a removal device 198 allows it in the conveying direction 182 the system of paint overspray and filter aid material and the gas delivery direction 196 on the sampling device 198 following heating zones 192c and 192d to heat more. As a result, a complete burning of escaped from the system of paint overspray and filter aid material can be guaranteed without having to fear that the filter aid by overheating of the same.

Incidentally, the in 13 illustrated embodiment of the rotary kiln 152 in terms of structure and function with the in 12 illustrated embodiment, so that reference is made to the above description in this respect.

In principle, one or more aspects of the described embodiments of filter systems can be used to condition the system of paint overspray and filter aid material 112 be combined with each other as desired. For example, it may be provided that the system of paint overspray and filter aid material according to 7 a combustion device 146 fed and then according to 10 by means of a cooling device 144 is cooled.

Characterized in that in all described embodiments of the filter system 112 A treatment of the system is made of paint overspray and filter aid material is a particularly material-saving and efficient operation of the filter system 112 and therefore also the paint shop 100 allows.

Claims (15)

Filter system comprising a filter device ( 114 ) for cleaning a crude gas stream laden with paint overspray, wherein the filter device ( 114 ) Comprises: - a filter element ( 120 ), at which paint overspray can be deposited from the raw gas stream laden with paint overspray together with the filter aid material supplied to the raw gas stream; - a receptacle ( 124 ) for receiving a system of paint overspray and filter aid; and - a sampling device ( 128 ) for removing at least part of the system of paint overspray and filter aid material from the receptacle ( 124 ), characterized in that the filter system ( 112 ) a processing device ( 134 ) for conditioning the system of paint overspray and filter aid material. Filter system according to claim 1, characterized in that the processing device ( 134 ) a thermal treatment device ( 140 ), by means of which the system of paint overspray and filter aid material for the treatment of the same is thermally treatable. Filter installation according to one of claims 1 or 2, characterized in that the treatment device ( 134 ) a mechanical treatment device ( 160 ) and / or a pneumatic treatment device ( 170 ), by means of which the system of paint overspray and filter aid material for the treatment of the same mechanically treatable and / or can be acted upon with air. Filter system according to one of claims 1 to 3, characterized in that the filter system ( 112 ) a storage device ( 180 ) for receiving and storing filter aid material and / or a system of paint overspray and filter aid material. Filter installation according to claim 4, characterized in that the storage device ( 180 ) a temporary storage device ( 184 ) for temporarily storing a processed system of paint overspray and filter auxiliary material, wherein the intermediate storage device ( 184 ) the processed system of paint overspray and filter aid material from the treatment device ( 134 ) and wherein by means of the buffer device ( 184 ) the processed system of paint overspray and filter aid for the filter device ( 114 ) is available. Filter installation according to one of claims 4 or 5, characterized in that the storage device ( 180 ) a temporary storage device ( 184 ) for temporary storage of a from the receptacle ( 124 ), the treatment device ( 134 ) is to be supplied system of paint overspray and filter aid material, the intermediate storage device ( 184 ) the system of paint overspray and filter aid material from the receptacle ( 124 ) and wherein by means of the buffer device ( 184 ) the system of paint overspray and filter aid for the treatment device ( 134 ) is available. Filter system according to one of claims 1 to 6, characterized in that the filter system ( 112 ) a control device ( 175 ) and / or a control device ( 177 ), by means of which it is possible to determine whether the filter device ( 114 ) provided for cleaning the raw gas stream filter aid unladen, fresh filter aid or a system of paint overspray and filter aid is. Filter system according to one of claims 1 to 7, characterized in that the filter system ( 112 ) a mixing device ( 186 ) by means of which unladen, fresh filter aid material and a system of paint overspray and filter aid material are merge and mixable. Method for operating a filter system ( 112 ), in particular a filter system ( 112 ) according to one of claims 1 to 8, comprising the following: - supplying a crude gas stream laden with paint overspray to a filter device ( 114 ) of a filter system ( 112 ); - Introducing filter aid in the raw gas stream; Depositing a system of paint overspray and filter aid and recording it in a receptacle ( 124 ), characterized in that at least a part of the system of paint overspray and filter aid material by means of a processing device ( 134 ) is processed. A method according to claim 9, characterized in that the system of paint overspray and filter aid material for the treatment thereof is thermally treated. Method according to one of claims 9 or 10, characterized in that the system of paint overspray and filter aid material for the preparation thereof dried, fired, burned and / or cooled and / or subjected to a pyrolysis process. Method according to one of claims 9 to 11, characterized in that the system of paint overspray and filter auxiliary material for the treatment of the same is subjected to compressed air. Method according to one of claims 9 to 12, characterized in that the system of paint overspray and filter aid material for the preparation of the same at least one processing aid is supplied. Method according to one of claims 9 to 13, characterized in that at least two process steps for the preparation of the system of paint overspray and filter aid material are performed. Method according to one of claims 9 to 14, characterized in that at least a part of the system of paint overspray and filter aid material from the receptacle ( 124 ) and outside the receptacle ( 124 ) is processed.

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