EP3083005A1

EP3083005A1 - Purifying device and method for purifying a crude gas stream

Info

Publication number: EP3083005A1
Application number: EP14809344.6A
Authority: EP
Inventors: Jürgen Jost; Frank SCHÖTTLE; Dietmar Wieland
Original assignee: Duerr Systems AG
Current assignee: Duerr Systems AG
Priority date: 2013-12-20
Filing date: 2014-12-02
Publication date: 2016-10-26
Also published as: CN105848752A; WO2015090942A1; CN105848752B; DE102013114646A1

Abstract

In order to provide a purifying device that has a simple design and operates reliably, the purifying device comprises the following: a roll member apparatus through which the crude gas stream can be directed in order for impurities to be separated from the crude gas stream, said roll member apparatus comprising a plurality of roll bodies to which the impurities attach; a regeneration apparatus for regenerating one or more roll members.

Description

Cleaning device and

Process for purifying a crude gas stream

The present invention relates to a cleaning device, in particular a separation device, for separating impurities from a raw gas stream laden with impurities, for example a raw gas stream laden with paint overspray.

A cleaning device for purifying a crude gas stream is known, for example, from EP 0 875 275 B1 or from DE 10 2006 029 058 A1. In particular, cleaning devices are known from these documents, in which impurities are separated from a crude gas stream by means of brush rollers.

The present invention has for its object to provide a cleaning device which is simple in construction and reliable operable.

This object is achieved according to the invention by a cleaning device for separating impurities from a crude gas stream laden with impurities, the cleaning device comprising: a roller body device, through which the crude gas stream can be passed for separating the impurities from the crude gas stream,

wherein the roll body device comprises a plurality of roll bodies to which the impurities are deposited;

a regeneration device for the regeneration of one or more roller bodies.

Because according to the invention a regeneration device is provided for the regeneration of individual or a plurality of roller bodies of a roller body device. can be seen, the cleaning device can be simple and reliable operable.

In this description and the appended claims, regeneration or regeneration is to be understood in particular as processing or treating the roll bodies in such a way that, after impurities have been contaminated by impurities from the raw gas flow, they are returned to a state in which impurities are again deposited can be.

A regeneration or a regeneration is in particular a cleaning and / or a preparation for a new deposition operation.

In one embodiment of the invention can be provided that the cleaning device comprises one or more movable Regenerierwagen.

A wagon, in particular a regeneration wagon, in this description and the appended claims is preferably to be understood as any movable object, for example an automatically movable object.

A Regenerierwagen can be moved, for example, ground-bound or ceiling-bound.

It can be provided that a regeneration vehicle can be moved by means of an external drive, in particular by means of a drive independent of the regeneration vehicle, and / or by means of an internal drive, in particular by means of a drive integrated in the regeneration vehicle.

The drive can be stationary or mitbewegbar with the Regenerierwagen.

In one embodiment of the invention it can be provided that the cleaning device, in particular the regeneration device, one or more Overhead conveyor or overhead conveyor to process one or more Regenerierwagen includes.

In particular, when an overhead conveyor device or a suspension conveyor device is provided for the method of one or more regeneration cars, undesired contamination of a guide rail and / or a drive unit can preferably be minimized or avoided altogether.

The one or more Regenerierwagen are preferably movable toward one or more roll bodies, in particular to be moved to regenerate them.

It can be advantageous if a regenerating trolley or several regenerating trolleys can be stored exclusively for regenerating one or more roller bodies to the roller bodies and, moreover, can be stored in a stand-by position or maintenance position.

It may be favorable if one or more regeneration carriages can be moved back and forth between a plurality of regeneration sections or regeneration regions of the roller body device.

For example, it can be provided that by means of one or more Regenerierwagen successively several Regenerierabschnitte or Regenerierbereiche the roll body device can be approached or controlled to regenerate arranged in these Regenerierabschnitten or Regenerierbereichen roller body.

Preferably, the one or more Regenerierwagen can be arranged to regenerate roll bodies in one or more regeneration positions. Preferably, the roller bodies of the roller body device are regenerable while they are arranged in a deposition position for separating impurities from the raw gas flow.

A regeneration trolley is for example a cleaning trolley, an application trolley and / or a precoating trolley.

It may be favorable if one or more regenerating carriages are movable in a cabin longitudinal direction, in a conveying direction and / or in a horizontal direction.

It can be provided that the cleaning device comprises a plurality of regeneration cars, each comprising one or more regeneration units.

The cleaning device comprises, for example, a plurality of regeneration cars, which comprise mutually different regeneration units.

Different regeneration units, in particular regeneration units with mutually different functions, are then assigned, for example, to one another from different regeneration wagons and / or arranged on separate regeneration wagons.

Preferably, the Regenerierwagen be fed successively to regenerate roll bodies to be regenerated roll bodies.

Alternatively or additionally, it can be provided that the cleaning device comprises a plurality of substantially identically designed Regenerierwagen.

For example, it may be provided that a plurality of regeneration cars are provided, each of which, for example, a drying device, a stripping device, a Appliziervorrichtung, a collecting device, a Extraction device, a delivery device and / or a storage device include.

It can be advantageous if the cleaning device, in particular one or more regeneration trolleys of the cleaning device, comprises a drying device for drying impurities on the roller bodies.

The drying device can be designed, for example, as a heating device and / or as a radiation device for heating and / or irradiating the roller bodies.

Alternatively or additionally, it can be provided that the drying device comprises a blocking device or is designed as a blocking device. By means of a blocking device, in particular throughflow of one or more roller bodies can be blocked with the raw gas flow, so that less or no fresh impurities can reach the roller body or bodies and thus dry the impurities present.

It may be favorable if the cleaning device, in particular one or more regeneration trolleys of the cleaning device, comprises a stripping device for the mechanical stripping off of impurities from the roller bodies.

The mechanical stripping device preferably comprises stripping elements, which can be brought into contact linearly and / or by rotational movement, in particular electrically, pneumatically and / or hydraulically, with one or more roller bodies.

It can be advantageous if the cleaning device, in particular one or more regeneration trolleys of the cleaning device, comprises an applicator device for applying an auxiliary material to the roller bodies. An Appliziervorrichtung comprises in particular a nozzle device by means of which auxiliary material on the rollers kör is applied by.

It may be favorable if auxiliary material can be applied to a trimming of the roller bodies, in particular on bristles or brushes of the roller bodies, by means of the application device.

It may be provided that the auxiliary material, the applicator, in particular a nozzle device, and / or the roller bodies are electrostatically chargeable. In this way, the auxiliary material can be easily and efficiently applied to the roll body.

By means of the applicator, in particular a coating of auxiliary material can be applied to the roller body.

In one embodiment of the invention can be provided that by means of the Appliziervorrichtung dry auxiliary material, in particular powdery auxiliary material, can be applied to the roll body.

It may be advantageous if the cleaning device, in particular one or more Regenerierwagen the cleaning device comprises a suction device for sucking impurities and / or auxiliary material from the roll bodies and / or from an environment of the roll body.

By means of the suction device, preferably cleaned impurities and / or auxiliary material can be sucked off, in particular during a regeneration process, a cleaning process, an application process and / or a precoating process.

The suction device is in particular a dust extraction device for sucking off solid particles. In one embodiment of the invention can be provided that the cleaning device, in particular one or more Regenerierwagen the cleaning device comprises a supply device for supplying auxiliary material to a Appliziervorrichtung.

The supply device comprises in particular a supply line, a fluidization device and / or a conveyor device.

Preferably, by means of the feed device, dry auxiliary material, in particular powdery auxiliary material, can be supplied to the applicator device.

It may be favorable if the cleaning device, in particular one or more regeneration trolleys of the cleaning device, comprises a storage device for receiving, storing and / or providing auxiliary material.

The storage device may in particular comprise a storage container or storage tank for receiving, storing and / or providing auxiliary material.

A drying device, a stripping device, an applicator device, a suction device, a feed device, a storage device and / or a collecting device preferably form mutually different regeneration units of the regenerating device.

Preferably, several regeneration units are required for the regeneration of the roll body. These regeneration units can be arranged, for example, on a single regenerating truck.

Alternatively or additionally, it can be provided that the regeneration units required for the regeneration of the roller bodies are assigned to one another from different regeneration carriages. The individual regeneration For the regeneration of the roller bodies, these wheels can then be fed successively to these roller bodies by means of the various regenerating carriages.

Furthermore, it can be provided that individual regeneration units, for example one or more stripping devices, are provided independently of the one or more regeneration cars.

For example, it can be provided that individual regeneration units, for example one or more stripping devices, are assigned directly to individual or several roll bodies and / or can be supplied to the individual or a plurality of roll bodies by separate drive devices and / or removed from the same.

It can be provided that the cleaning device, in particular one or more regeneration trolleys of the cleaning device, comprises a collecting device. By means of a collecting device, in particular during cleaning, for example stripping, of contaminants from the roller bodies falling material can be collected.

The collecting device may for example comprise a collecting container, for example a collecting trough and / or a collecting trough.

Alternatively or additionally, it may be provided that the regeneration device comprises a separate and / or additional separate collecting device from the regenerating truck. For example, a separate collecting container may be provided.

It may be favorable if, by means of a screw device, a computing system, a conveyor belt or another conveying device, material, in particular contaminated with contaminants, can be transported out of the collecting container. The collecting device is preferably arranged under one or more, in particular all, roll bodies.

Material collected by means of the collecting device can preferably be removed automatically or manually, for example removed.

In particular, when the collecting device is a separate device from the one or more regenerating carriages, the arrangement of movable or driven components on the one or more regenerating carriages can preferably be avoided. The Regenerierwagen are then preferably simple and robust.

It may be favorable if the stripping device and the applicator device are assigned to one another from different replenishment carriages, in particular to mutually different regenerating carriages. In this way, the Appliziervorrichtung and the stripping device can be arranged spatially separated from each other, so that in particular when cleaning the roller body resulting coarse impurities do not lead to contamination of the Appliziervorrichtung.

In particular, if a plurality of regeneration units are assigned to one another from different regeneration wagons, the regeneration wagons can be made smaller in each case and thus occupy a smaller installation space.

The auxiliary material preferably serves to facilitate a cleaning of the contaminants from the roll bodies and / or to avoid a permanent adherence of the impurities to the roll bodies.

For this purpose, the auxiliary material can be applied to the roll bodies on the one hand before the impurities are deposited on the roll bodies. The auxiliary material then forms in particular a protective layer or barrier layer on the roller bodies. Alternatively or additionally, it may be provided that the auxiliary material for removing and / or releasing the impurities from the roll bodies can be applied to the roll body. In particular, it can be provided that the auxiliary material is applied after the deposition of impurities on the roller bodies in order to release the impurities from the roller bodies.

The auxiliary material is then in particular a solvent, for example a liquid solvent.

Auxiliary material may be present in particular in the solid state and / or in the liquid state and / or used.

Auxiliary material is in particular filter aid material for separating impurities or pollutants from a crude gas stream.

Filter aid material is used in particular in filter devices.

The roller body device is preferably a filter device, in particular a regenerable filter device.

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

A regenerable filter device is in particular also to be understood as meaning a filter device which has one or more dry filter elements and / or one or more dry separation devices, in which a purification of a gas stream substantially without the addition a liquid takes place on 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.

In the case of a regenerable filter device, provision may also be made for the filter device to comprise at least one filter element which, in filter operation, is provided with a barrier layer and / or a protective layer which comprises auxiliary material, for example stone meal.

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.

The roller bodies are preferably dry filter elements, which are provided with a barrier layer, protective layer and / or auxiliary layer of auxiliary material, in particular to prevent unwanted permanent adhesion of the impurities, in particular the paint overspray, to the roll bodies.

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.

Impurities can be, for example, paint, in particular paint overspray, which arises during operation of a paint shop.

As auxiliary material, in particular any medium can be used, which is able to absorb a liquid content of the impurities.

Auxiliary material is preferably a particulate and / or powdery material.

In particular, as auxiliary materials, for example, lime, stone powder, in particular limestone powder, aluminum silicates, aluminum oxides, silicon oxides, powder coating or the like into consideration.

Alternatively or additionally, as auxiliary material for receiving and / or binding the contaminants, it is also possible to use particles having a cavity structure and a large inner surface relative to their outer dimensions, for example natural and / or synthetic zeolites or other hollow, for example spherical, bodies 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 are in particular called zeolites

(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, particles which react chemically with the impurities, for example chemically reactive particles with amine, epoxide, carboxyl, hydroxyl or isocyanate groups, chemically reactive particles, can also be used as auxiliary material for receiving and / or binding the impurities with octylsilane aftertreated alumina or solid or liquid mono-, oligo- or polymers, silanes, silanols or siloxanes.

The auxiliary material preferably consists of a multiplicity of auxiliary material particles, which in particular have a mean diameter in the range from approximately 1 μm to approximately 100 μm.

In particular, the auxiliary material is a flowable, particulate material which, for example in the form of filter aid material, is also referred to as a "precoat" material.

The filter aid serves in particular to deposit itself as a barrier layer on the surface of a filter element, in order to prevent this surface from sticking to it by adhering paint overspray particles. A system of impurities and auxiliary material, in particular paint overspray and filter aid material, can in particular be periodically cleaned.

In particular, contaminant loaded auxiliary material may be a mixture or system of contaminant particles and auxiliary material particles. For example, the mixture may comprise conglomerates and / or agglomerates of impurity particles and particles of auxiliary material.

Impurity particles are especially paint droplets.

Auxiliary material particles are especially stone meal granules. In one embodiment of the invention can be provided that a roller body comprises a base body, which is provided with a trim, in particular a brush trim, for attachment of the impurities.

The main body can, for example, a shaft, in particular a in

Substantially cylindrical shaft.

The trim is formed in particular from radially outwardly projecting elements, such as brushes, bristles and / or fibers.

Preferably, the radially outwardly projecting elements are yielding and / or flexible.

Preferably, the roller bodies are designed as brush rollers.

It may be favorable if the cleaning device comprises a plurality of essentially identical roller bodies.

In particular, it can be provided that all roller bodies are formed substantially identical.

It may be advantageous if the roller bodies are formed substantially rotationally symmetrical about an axis of rotation of the respective roller body.

The axes of rotation of the roller bodies are, for example, in a common plane, in two or more planes running parallel to one another or on a circular cylinder jacket surface.

It may be favorable if the roller bodies form a linear series of roller bodies or are arranged in a zig-zag pattern. In one embodiment of the invention can be provided that the roller body device forms a main filter stage and / or a pre-filter stage of the cleaning device.

The roller body device is preferably a Nachfilterstufe, in particular a Nachfiltervorrichtung, and / or downstream of a safety filter device.

In particular, it can be provided that the roller body device is a filter stage (separation stage), preferably a first filter stage, to which a flow direction is followed first by a postfilter device and subsequently by a police filter device or safety filter device.

The afterfilter device comprises in particular disposable filters, replaceable filters, folding cardboard filters, paper and / or cardboard filters, bag filters and / or surface filters for the separation of impurities.

Furthermore, it can be provided that the afterfilter device comprises an electrodeposition device, in particular an electron separation device.

It may be favorable if the afterfilter device comprises one or more of the above-mentioned filter and / or separation devices, which in particular can flow or flow through in series and / or in parallel.

It may be advantageous if the cleaning device comprises two roller body devices, which are arranged in particular on both sides of a central Rohgasschachts the cleaning device. It may be favorable if the roll body devices are formed symmetrically with respect to one another with respect to a vertical longitudinal center plane of the cleaning device and / or are arranged symmetrically with respect to one another.

It may be provided that the cleaning device comprises one or more flow-influencing devices and / or comparative moderating devices, for example one or more perforated plates.

A flow influencing device and / or equalizing device is in particular arranged upstream or downstream of a filter stage, in particular upstream or downstream of a secondary filter device.

By means of a flow influencing device and / or equalization device, it is possible to achieve a targeted flow influencing during the flow through the cleaning device.

The flow influencing device and / or homogenizing device, in particular the perforated plate, may preferably have varying hole sizes and / or an uneven hole distribution in order to influence a total flow in a targeted manner.

It may be favorable if the flow influencing device and / or uniforming device forms a holding device for a filter stage, in particular for a postfilter device.

Preferably, the cleaning device comprises one or more flow influencing devices and / or equalization devices for targeted local influencing, in particular amplification or attenuation, of the raw gas flow. By means of the homogenizing device and / or the flow influencing device, in particular a uniform loading of the roller bodies with impurities can be achieved.

In one embodiment of the invention it is provided that the regeneration device is arranged downstream of the roller body device. In particular, a drying device designed as a blocking device can be arranged downstream of the roll body device. As a result, the flow through one or more roller bodies can be selectively blocked, so that no further impurities are deposited and the contaminants which are already deposited on the roller body can dry.

A regeneration wagon, in particular a drying device of a regeneration wagon, preferably remains arranged downstream of one or more roll bodies until the drying of the impurities on the one or more roll bodies has progressed so far that the wiping can take place, for example by stripping the dried impurities by means of the stripping device.

It may be advantageous if the stripping device can be pressed and / or pressed linearly or by pivoting movement against the roller bodies. Preferably, the stripping device can be pressed and / or pressed against the roller body in such a way that the bristles of the roller body strip along the stripping device and thereby at least partially detach the preferably dried contaminants from the bristles.

The regeneration device, in particular one or more Regenerierwagen, in particular downstream of the roller body device, for example, with respect to the flow direction of the raw gas flow between the roller body device and the Nachfiltervorrichtung, be arranged. Alternatively or additionally, it can be provided that the regeneration device, in particular one or more regeneration trolleys, is arranged upstream of the roller body device.

The present invention further relates to a method for purifying a crude gas stream loaded with impurities.

The invention is in this respect the task of providing a method for cleaning a laden with impurities crude gas stream, which allows a simple and reliable operation of a cleaning device.

This object is achieved according to the invention in that the method for purifying a crude gas stream laden with impurities comprises the following:

Supplying the contaminated raw gas stream to a roll body device;

Separating the impurities from the crude gas stream to roll bodies of the roll body device;

Regenerating one or more roller bodies by means of a regeneration device.

The method according to the invention preferably has one or more of the features and / or advantages described in connection with the device according to the invention.

Furthermore, the device according to the invention preferably has one or more of the features and / or advantages described in connection with the method according to the invention.

It may be favorable if, for regeneration of one or more roll bodies, one or more regeneration units, in particular simultaneously or successively, the one or more roller bodies are supplied.

Furthermore, it can be provided that for regenerating one or more roller bodies, a plurality of regeneration units are fed to the one or more roller bodies by means of one or more regeneration carriages.

To regenerate one or more roller bodies, preferably a plurality of regeneration units of the regeneration device are activated and / or used one after the other.

In particular, it can be provided that first the impurities are dried on the roller bodies by means of the drying device.

Subsequently, the impurities are preferably removed by means of the stripping of the roller bodies.

During this cleaning of the roller body, in particular by means of the stripping device, the suction device is preferably activated. In this way, the material cleaned off from the roll bodies can be sucked off in order to avoid unwanted contamination of an environment of the roll body and / or the cleaning device as a whole.

In particular, by means of the suction device, undesired contamination of the area between the roller bodies and the post-filter device can be avoided.

It is particularly advantageous if the suction device is activated during painting breaks, in particular to avoid unwanted suction of raw gas through the roll body to be regenerated. Since only a very short time is needed for the extraction and / or for the stripping process, this can preferably be carried out during each production break and / or during each cleaning break.

After removal of the impurities from the roll bodies, preferably an application process, in particular a precoating process, is carried out. This may be necessary in particular for different types of impurities, for example different types of lacquer.

The Appliziervorgang is preferably carried out by means of the Appliziervorrichtung. In particular, in this case auxiliary material can be applied by means of nozzles on the roll body to produce a barrier layer, protective layer and / or auxiliary layer of auxiliary material on the roll bodies.

Nozzles, in particular precoating nozzles, of the applicator device can, on the one hand, be distributed uniformly over a height of a regeneration trolley and / or evenly distributed over a height of the roller bodies.

Alternatively or additionally, it can be provided that the Appliziervorrichtung comprises one or more movable, in particular vertically movable, nozzles for applying auxiliary material.

The Appliziervorrichtung can be supplied on the one hand by means of a feeder from an external source with auxiliary material.

Alternatively or additionally, it can be provided that the application device is supplied with auxiliary material by means of a storage device arranged on a regeneration carriage.

A refilling of the storage device is preferably carried out in a maintenance position or maintenance position of the recovery truck, in particular between two Regeneriervorgängen. In particular, when the cleaning device comprises two Walzenkörpervor- directions which are arranged on opposite sides of a Rohgasschachts the cleaning device, the regeneration of the roller body of the opposite roller body devices is preferably offset relative to one another with respect to a conveying direction, so preferably not simultaneously regenerated oppositely arranged roll body become. In this way, an undesired influence of the regeneration on the air flow in the paint booth can preferably be avoided.

In particular, in order to optimize the degree of separation, it can be provided that the cleaning device comprises a charging device for the electrostatic charging of the impurities in the raw gas stream.

The charging device may comprise, for example, discharge electrodes and / or corona wires.

It may be favorable if the charging device is arranged upstream of the roller body device with respect to the flow direction of the raw gas flow.

By means of a corona discharge, in particular by ionizing the impurities, for example of droplets or particles in the crude gas stream, preferably a stronger attraction can be achieved by means of the roll body.

In particular, it can be provided that the roller bodies form precipitation electrodes.

For example, the collecting electrodes are formed by an electrically conductive trimming of the roll body. Preferably, the trim, in particular the bristles of the roll body, comprises a soot particle-containing material which is electrically conductive.

The number of corona wires and / or their distance from each other can preferably be varied depending on a deposition behavior of the impurities.

It can be provided that the post-filter device comprises one or more post-filter elements.

Preferably, one or more post-filter elements of the post-filter device are individually exchangeable.

In particular, it can be provided that the post-filter elements of the post-filter device are individually accessible and individually exchangeable.

The afterfilter device is preferably formed segmented.

For example, it may be provided that the postfilter device comprises a plurality of postfilter segments and / or postfilter modules.

The post-filter elements of the post-filter device are preferably accessible via one or more accesses, in particular doors or flaps in a cabin outer wall.

Alternatively or additionally, it may be provided that an access, for example a door or a flap, is arranged on the front side of the cleaning device. In particular, between the roller body device and the Nachfiltervorrichtung then preferably an access area is formed, through which the Nachfilterelemente in particular for the exchange of the same are accessible. The Nachfilterelemente are then interchangeable in particular from the raw gas side. Furthermore, it can be provided that the postfilter elements of the postfilter device are arranged in individually delimitable segments or modules of the postfilter device. Individual segments or modules of the after-filter device can be separated, in particular, by means of a valve device, for example by means of a flap or a slide. The crude gas stream then preferably flows through this segment or module no longer. By a separate access for each of the segments or each of the modules is then preferably from outside the cleaning device, the Nachfilterelement the Nachfiltervorrichtung for easy exchange of the same accessible. In this embodiment, the post-filter element is preferably exchangeable during regeneration of the roller body device and / or during the separation operation of the cleaning device.

The cleaning apparatus and / or the method for purifying a crude gas stream may furthermore have the following features and / or advantages in particular:

The regeneration and / or precoating of the roller bodies (the pre-separation device or the main separation device) is preferably possible during the ongoing painting operation. Even with very rare or very short downtime, the cleaning device can thus preferably be used successfully.

By a suction device, in particular a Staubabsaugungsvor- direction, in a Regenerierwagen can preferably account for a manual disposal of the costs incurred in the regeneration of the roll body material, in particular the dust, for the most part.

The cleaning device is preferably automated, so that a small manual effort for the operation of the same is required. If required, subsequent filter elements can preferably be changed during ongoing operation, in particular during the ongoing deposition operation.

The cleaning device according to the invention is particularly suitable for use in a workpiece treatment system for the treatment of workpieces.

The present invention therefore also relates to a workpiece treatment system which comprises a cleaning device according to the invention.

The workpiece treatment system is, for example, a painting installation for painting workpieces, in particular vehicle bodies.

Further preferred 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 shows a schematic vertical cross section through a workpiece treatment system for treating workpieces, in which a first embodiment of a cleaning device for separating impurities from a raw gas stream is provided;

FIG. 2 shows a schematic horizontal cross section through a roller body device of the cleaning device from FIG. 1; FIG.

3 shows a schematic vertical cross section through a second embodiment of a cleaning device in which a regeneration trolley of the cleaning device can be moved by means of a suspension conveyor, wherein the regeneration trolley is operated in a cleaning operation; 4 shows a further schematic vertical cross section through the cleaning device from FIG. 3, wherein the Regenerierwagen is operated in an Applizierbetrieb;

Fig. 5 is a corresponding to Fig. 3 schematic representation of a third

Embodiment of a cleaning device in which a plurality of regeneration vehicles are provided with mutually different regeneration units;

Fig. 6 is a corresponding to Fig. 2 schematic representation of a fourth

Embodiment of a cleaning device in which a charging device is provided for the electrostatic charging of impurities in the raw gas stream;

7 shows a schematic horizontal cross section through a fifth embodiment of a cleaning device, in which a post-filter device with only one post-filter element is provided; and

FIG. 8 is a schematic representation corresponding to FIG. 7 of a sixth embodiment of a cleaning device in which a segmented afterfilter device is provided.

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

1 and 2 embodiment of a workpiece treatment system designated as a whole by 100 serves for the treatment of workpieces 102.

The workpiece treatment system 100 is designed, in particular, as a painting installation 104 for painting workpieces 102, in particular for painting vehicle bodies 106. The workpieces 102 can be conveyed by means of a conveying device (not shown) along a conveying direction 108 through a painting booth 110 of the workpiece treatment system 100.

When painting the workpieces 102, the air surrounding the workpieces 102 absorbs paint overspray.

In order to avoid unwanted contamination of the workpieces 102 and / or components of the paint shop 104, the paint booth 110 is flowed through by a gas stream which entrains the paint overspray from the paint booth 110.

In particular, this laden with paint overspray gas flow with respect to the direction of gravity g is discharged downward from the spray booth 110.

The paint overspray forms impurities that have to be removed from the gas stream.

The workpiece treatment system 100 comprises a cleaning device 112 for this purpose.

The cleaning device 112 is arranged under the spray booth 110 and serves to separate impurities, in particular paint overspray, from the raw gas stream laden with contaminants.

The cleaning device 112 is preferably a filter device 114, in particular a regenerable filter device 114.

For separating the contaminants from the raw gas stream, the cleaning device 112 comprises a pre-filter stage 116, a main filter stage 118, a post-filter stage 120 and / or one or more safety filter devices 122. In the embodiment of the cleaning device 112 shown in FIGS. 1 and 2, a pre-filter stage 116 or main filter stage 118 of the cleaning device 112 is formed by a roller body device 124.

The roller body device 124 comprises a plurality of roller bodies 126 for separating impurities from the raw gas flow.

The roller bodies 126 are in particular brush rollers 128 and comprise a main body 130 which is provided with a trim 132, in particular a brush trim 134.

As in particular Fig. 2, a plurality of roller bodies 126 of the roller body device 124 are arranged one behind the other along the conveying direction 108.

In this case, the roller bodies 126 are arranged relative to one another such that a linear row of roller bodies 126 forms, wherein a stocking 132 of each roller body 126 intersects, at least in sections, with the stocking 132 of the respectively adjacent roller body 126.

The roller bodies 126 are rotatable about axes of rotation 136 aligned parallel to the direction of gravity g.

The rotation axes 136 of the roller bodies 126 are arranged parallel to one another.

During operation of the cleaning device 112, the roller bodies 126 rotate.

At the same time, the roller bodies 126 are flowed through by the raw gas stream, wherein the impurities contained in the raw gas stream at least partially accumulate on the brush attachment 134 of the roller bodies 126. Impurities which are still contained in the raw gas stream after flowing through the roller body device 124 are preferably separated from the raw gas stream by means of the postfilter stage 120.

For this purpose, the postfilter stage 120 comprises a postfilter apparatus 138, which comprises one or more postfilter elements 140.

Furthermore, the cleaning device 112 comprises an equalization device 142 or a flow influencing device 144, by means of which the flow through the roller body device 124 and / or the post-filter device 138 can be specifically influenced locally in particular.

The homogenizing device 142 and / or the flow influencing device 144 is designed in particular as a perforated plate 146.

The perforated plate 146 may be a separate element from the remaining elements of the cleaning device 112.

However, it can also be provided that the perforated plate 146 at the same time a support element for receiving the Nachfiltervorrichtung 138, in particular the Nachfilterelemente 140 of the Nachfiltervorrichtung 138 is.

Referring particularly to FIG. 1, in this first embodiment of the cleaning device 112, two roller body devices 124, two post-filter devices 138, two equalizers 142 or flow control devices 144 and two safety filter devices 122 are provided.

These devices 124, 138, 142, 144, 122 are arranged and / or formed substantially mirror-symmetrically with respect to a vertical longitudinal center plane 148 of the cleaning device 112. Between the two roller body devices 124, a raw gas well 150 of the cleaning device 112 is formed, through which the raw gas laden with impurities can be fed to the roller body devices 124.

Below the raw gas duct 150 and separated therefrom, a clean gas collecting duct 152 of the cleaning device 112 is provided.

This clean gas collecting channel 152 is supplied with the gas cleaned by means of the filter stages 116, 118, 120, 122 in order to supply it to a further use or to deliver it to the environment as purified exhaust gas.

After a certain period of operation of the cleaning device 112, the roller bodies 126 of the roller body device 124 are heavily loaded with impurities, so that a reliable cleaning of the raw gas flow can be impaired.

To restore the full cleaning effect of the cleaning device 112, the cleaning device 112 comprises one or more regeneration devices 154.

A regeneration device 154 includes a plurality of regeneration units 156 for treating the roller bodies 126 of the roller body device 124.

In particular, a drying device 158, a stripping device 160 and / or an application device 162 are provided as regeneration units 156.

Furthermore, it can be provided that the regeneration device 154 comprises regenerating units 156 configured as a suction device 164 and / or as a collecting device 166.

The drying device 158 is designed, for example, as a heating device or radiation device. In the embodiment of the cleaning device 112 shown in FIGS. 1 and 2, the drying device 158 is in particular a blocking device 168 for blocking a flow through the roller body 126 to be regenerated.

For this purpose, the drying device 158 comprises two side walls 170 and a rear wall 172. An open side 174 lying opposite the rear wall 172 can be applied to the roller bodies 126.

By means of the side walls 170, the rear wall 172 and the roller body 126, a substantially closed regeneration space 176 can thus be provided.

This substantially closed regeneration space 176 prevents despite the arrow in FIG. 2 indicated flow of the roller body 126 with raw gas flowing through the roller body 126th

Consequently, the roller bodies 126 do not absorb any further impurities, so that the impurities already taken up, in particular the lacquer overspray already taken up, can dry.

In the case of a drying device 158 designed as a blocking device 168, an additional heating device or radiation device is therefore preferably dispensable.

To accelerate the drying, however, it may be provided that a heating device and / or a radiation device is provided in addition to a blocking device 168.

The stripping device 160 comprises a plurality of stripping elements 178 which can be applied to the roller bodies 126, in particular to the trim 132 of the roller bodies 126. By means of the stripping elements 178, in particular the roll body 126 is acted upon mechanically in order to mechanically remove the impurities deposited on the stocking 132 of the roll body 126.

In particular, by means of the stripping elements 178, the dried impurities can be stripped off the roll bodies 126.

In particular, the applicator 162 comprises a plurality of nozzles 180 for applying an auxiliary material to the roller bodies 126.

In particular, by means of the applicator 162, a powdery auxiliary material can be applied to the roller body 126.

The auxiliary material can on the one hand serve to detach contaminants from the roll bodies 126. On the other hand, the auxiliary material can form a protective layer on the roller bodies 126, so that impurities adhering to the roller bodies 126 can easily be removed again after the protective layer has been applied.

By means of the suction device 164 in particular dust and other fluidized or aufwirbelbare impurities from the regeneration space 176 of the regenerating device 154 are sucked.

In particular, by means of the suction device 164 dry dust, which arises during the cleaning of the roller body 126 by means of the stripping device 160, can be removed from the regeneration space 176.

By means of the collecting device 166, material falling from the roller bodies 126, in particular dried impurities, can be collected. In the embodiment of the cleaning device 112 shown in FIGS. 1 and 2, it is provided that the regeneration device 154 comprises a regeneration carriage 182.

This regenerating trolley 182 can be moved longitudinally and counter to the conveying direction 108 by means of a movement device 184.

In particular, the regeneration trolley 182 can be fed successively to different roller bodies 126 in order to regenerate them.

The movement device 184 includes, for example, two guide devices 186 for targeted guidance of the regeneration carriage 182.

In the in Figs. 1 and 2 illustrated first embodiment of the cleaning device 112 is provided that a guide device 186 of the bottom receiving and guiding the Regenerierwagens 182 serves, while the other guide device 186 is arranged on the ceiling side.

The regeneration trolley 182 preferably comprises all the regeneration units 156.

For regenerating the roller bodies 126, a plurality of regeneration units 156 can preferably be activated simultaneously or successively.

The in Figs. 1 and 2, the first embodiment of the cleaning device 112 functions as follows:

The crude gas stream, which is produced during operation of the workpiece treatment system 100 and loaded with contaminants, is fed to the roll body devices 124 via the raw gas shaft 150. The raw gas stream then flows through the rotating roller bodies 126, at least part of the impurities contained in the raw gas flow being attached to the stocking 132 of the roller bodies 126.

The crude gas stream freed in this way, at least partially from the impurities, is next fed to the afterfilter devices 138, subsequently passed through the safety filter devices 122 and finally discharged via the clean gas collecting channel 152 as a clean gas stream.

With increasing loading of the roller body 126 with impurities, the cleaning effect of the cleaning device 112 is impaired.

Consequently, the impurities must be removed at regular intervals from the roller bodies 126 in order to ensure a reliable cleaning action of the cleaning device 112.

In particular, the roller bodies 126 must be regenerated.

This is done by means of the regeneration device 154.

The regenerating carriage 182 of the regenerating device 154 is moved by means of the movement device 184 along the guide devices 186 to the roller bodies 126 to be regenerated.

By means of the drying device 158, the impurities are then first dried on the roller bodies 126 to be regenerated.

These dried contaminants are then mechanically removed from the roll bodies 126 by the stripper 160.

The dried impurities fall partially in the direction of gravity g down into the catcher 166. Another part of the dried impurities is whirled up as dust and removed from the regeneration space 176 by means of the suction device 164.

After cleaning of the roller body 126, these are acted upon by the applicator 162 with auxiliary material.

In particular, in this case a barrier layer or protective layer is applied to the stocking 132 of the roll body 126.

Finally, the regenerating truck 182 is removed from the roller bodies 126 to be regenerated by means of the moving device 184.

The roller bodies 126 can then be flowed through again with the raw gas stream and are thus available for further purification of the crude gas stream.

One in FIGS. 3 and 4 illustrated second embodiment of a cleaning device 112 differs from that shown in FIGS. 1 and 2 essentially in that the movement device 184 is designed as a suspension conveyor 188.

Furthermore, no guide device 186 is provided on the bottom side.

The movement device 184 can thus preferably be kept largely free of undesired impurities.

In Fig. 4, a supply device 190 for supplying auxiliary material to the application device 162 is also shown.

In particular, auxiliary material can be supplied from an external source (not shown) by means of the feed device 190. The Fig. 3 and 4 show different cross sections through the regenerating carriage 182, so that in particular the stripping device 160 is shown in FIG. 3, while in FIG. 4, the applicator 162 is shown.

Incidentally, the in Figs. 3 and 4 illustrated second embodiment of the cleaning device 112 with respect to structure and function with the first embodiment shown in FIGS. 1 and 2, so that reference is made to the above description in this regard.

A third embodiment of a cleaning device 112 shown in FIG. 5 essentially differs from the second embodiment shown in FIGS. 3 and 4 in that the regeneration device 154 comprises a plurality of regeneration carriages 182 which comprise different regeneration units 156 from each other.

For example, a Regenerierwagen 182 is provided for receiving the drying device 158.

Another regeneration trolley 182 serves to receive the applicator 162.

A feeder 190 for supplying auxiliary material from an external source is not provided in the third embodiment shown in FIG.

Rather, the Regenerierwagen 182, on which the Appliziervorrichtung 162 is provided, a memory device 192 for receiving, storing and providing auxiliary material.

The storage device 192 is designed in particular as a storage container 194. In the third embodiment of the cleaning device 112 shown in FIG. 5, it is additionally provided that the stripping device 160 is independent of a regeneration carriage 182.

Instead, the stripping device 160 can be activated independently of the further regeneration units 156 by means of a separate drive device 196.

In particular, the stripping elements 178 of the stripping device 160 can be selectively fed to one or more roller bodies 126 by means of the drive device 196 in order to be able to strip away the contaminants deposited thereon.

The use of a plurality of regeneration trolleys 182 for different regeneration units 156 as well as the separate arrangement of the stripping apparatus 160 can in particular offer the advantage that regeneration units 156 that are not needed can be arranged in a protected area, in particular a maintenance area.

In particular, the applicator 162 may be placed in a protected area to protect it when the scraper 160 is being used, producing a large amount of dust and other dry contaminants.

Incidentally, the in Fig. 5 illustrated embodiment of the cleaning device 112 with respect to structure and function with the second embodiment shown in FIGS. 3 and 4, so that reference is made to the above description in this regard.

A fourth embodiment of a cleaning device 112 shown in FIG. 6 differs from that shown in FIGS. 1 and 2, essentially in that the cleaning device 112 comprises a charging device 198. In particular, the impurities in the raw gas stream can be electrically charged by means of the charging device 198 in order to facilitate the deposition of the impurities.

The charging device 198 is arranged for this purpose in particular upstream of the roller body devices 124.

In particular, the charging device 198 comprises a plurality of discharge electrodes 200 and / or corona wires 202 for targeted electrical charging of the contaminants.

The roller bodies 126, in particular the respective trim 132 of the roller bodies 126, are preferably designed to be electrically conductive in order to utilize the electrostatic attraction for the targeted deposition of the electrostatically charged impurities in order to increase the separation efficiency.

Incidentally, the fourth embodiment of the cleaning device 112 shown in FIG. 6 is identical in construction and function to the first embodiment shown in FIGS. 1 and 2, so that reference is made to the above description thereof.

An illustrated in Fig. 7 fifth embodiment of a cleaning device 112 is substantially identical to the in Figs. 1 and 2, so that reference is made to the foregoing description in terms of structure and function.

In addition, in the case of FIG. 7 illustrated fifth embodiment of the cleaning device 112, a maintenance area 204 is provided.

In this maintenance area 204 of the regenerating 182 of the regenerating device 154 is movable, in particular to the collecting device 166 to empty and prepare the Regenerierwagen 182 for a further regeneration process.

As Fig. 7, the post-filter device 138 in the fifth embodiment of the cleaning device 112 is designed to be continuous throughout the cleaning device 112.

Through an access 206, which is arranged in particular in an outer wall 208 of the cleaning device 112, the post-filter element 140 is the same for the exchange and / or for cleaning accessible.

Via a further access 210, which is arranged in particular in an end wall 212 of the cleaning device 112, preferably the Regenerierwagen 182 between the roller body device 124 and the Nachfiltervorrichtung 138 can be introduced or moved into the maintenance area 204. The further access 210 forms in particular a lock device 214, by means of which the regeneration trolley 182 can be introduced into an interior 216 of the cleaning device 112 and removed from the interior 216 of the cleaning device 112.

A sixth embodiment of a cleaning device 112 shown in FIG. 8 essentially differs from the fifth embodiment shown in FIG. 7 in that the afterfilter device 138 comprises a plurality of separate afterfilter segments 218.

Each postfilter segment 218 can be flowed through with a gas stream substantially independently of the further postfilter segments 218.

Each postfilter segment 218 preferably includes a valve device 220 to selectively allow or block the flow through the respective postfilter segment 218. For this purpose, the valve device 220 is designed, for example, as a flap 222 or as a slide 224.

Each postfilter segment 218 includes one or more postfilter elements 140.

The one or more postfilter elements 140 of each postfilter segment 218 are preferably interchangeable independently of the postfilter elements 140 of the further postfilter segments 218.

The postfilter segments 218 each include a separate access device 226 for this purpose.

Through the access device 226, the post-filter elements 140 are accessible for the exchange of the same.

To replace a post-filter element 140 of a post-filter segment 218, first the valve device 220 of the respective post-filter segment 218 is closed in order to block the flow through the post-filter segment 218 with the gas stream.

The after-filter element 140 of the post-filter segment 218 is accessible via the access device 226 and can thus easily be exchanged for a fresh after-filter element 140.

After replacing the postfilter element 140 and closing the access device 226, the valve device 220 can be reopened.

The postfilter segment 218 is then available for re-deposition of contaminants from the raw gas stream. Due to the segmented design of the Nachfiltervorrichtung 138 and by the targeted regeneration of individual or multiple rollers kör by 126 by means of Regenerierwagens 182, the roller body device 124 and the Nachfiltervorrichtung 138 can be maintained even during the paint operation of the paint shop 104 in particular.

The cleaning device 112 and the entire workpiece treatment system 100 can thus be operated particularly efficiently.

Incidentally, the in Fig. 8 illustrated sixth embodiment of the cleaning device 112 in terms of structure and function with the in FIG. 7, so that reference is made to the above description thereof in this regard.

Claims

claims

A cleaning device (112) for separating contaminants from a contaminated raw gas stream, the cleaning device (112) comprising:

a roller body device (124), through which the raw gas stream can be passed for separating off the impurities from the raw gas stream,

wherein the roller body device (124) comprises a plurality of roller bodies (126) to which the impurities are deposited; a regeneration device (154) for regenerating one or more roller bodies (126).

2. Cleaning device (112) according to claim 1, characterized in that the cleaning device (112) comprises one or more movable Regenerierwagen (182).

3. Cleaning device (112) according to one of claims 1 or 2,

characterized in that the cleaning device (112) comprises a plurality of regeneration carriages (182) each comprising one or more regeneration units (156).

4. Cleaning device (112) according to one of claims 1 to 3, characterized in that the cleaning device (112) comprises a plurality of regeneration trolleys (182) which comprise mutually different regeneration units (156).

5. Cleaning device (112) according to one of claims 1 to 4, characterized in that the cleaning device (112) comprises a plurality of substantially identically formed Regenerierwagen (182).

6. Cleaning device (112) according to one of claims 1 to 5, characterized in that the cleaning device (112), in particular a or a plurality of regeneration trolleys (182) of the cleaning device (112), a drying device (158) for drying impurities on the roll bodies (126).

7. Cleaning device (112) according to one of claims 1 to 6, characterized in that the cleaning device (112), in particular one or more Regenerierwagen (182) of the cleaning device (112), a stripping device (160) for mechanically stripping contaminants from the Roll bodies (126) comprises.

8. Cleaning device (112) according to one of claims 1 to 7, characterized in that the cleaning device (112), in particular one or more Regenerierwagen (182) of the cleaning device (112), an applicator (162) for applying an auxiliary material to the roll body (126).

9. Cleaning device (112) according to any one of claims 1 to 8, characterized in that by means of the Appliziervorrichtung (162) dry auxiliary material, in particular powdery auxiliary material, on the roller body (126) can be applied.

10. Cleaning device (112) according to any one of claims 1 to 9, characterized in that the cleaning device (112), in particular one or more Regenerierwagen (182) of the cleaning device (112), a suction device (164) for the suction of contaminants and / or Auxiliary material from the roller bodies (126) and / or from an environment of the roller body (126).

11. Cleaning device (112) according to one of claims 1 to 10,

characterized in that the cleaning device (112), in particular one or more Regenerierwagen (182) of the cleaning device (112), a feed device (190) for supplying auxiliary material to a Appliziervorrichtung (162).

12. Cleaning device (112) according to one of claims 1 to 11, characterized in that the cleaning device (112), in particular one or more Regenerierwagen (182) of the cleaning device (112), a storage device (192) for receiving, storing and / or Provision of auxiliary material includes.

13. Cleaning device (112) according to one of claims 1 to 12,

characterized in that the roller bodies (126) comprise a base body (130) which is provided with a trim (132), in particular a brush attachment (134), for the attachment of the impurities.

14. Cleaning device (112) according to one of claims 1 to 13,

characterized in that the roller body device (124) forms a main filter stage (118) and / or a prefilter stage (116) of the cleaning device (112), downstream of which is a postfilter stage (120) and / or a safety filter apparatus (122).

15. A method of purifying a contaminant-laden crude gas stream comprising:

Supplying the contaminant-laden raw gas stream to a roll body device (124);

Separating the contaminants from the raw gas stream to roll bodies (126) of the roll body device (124); Regenerating one or more roller bodies (126) by means of a regeneration device (154).

A method according to claim 15, characterized in that for regenerating one or more roller bodies (126) one or more regeneration units (156), in particular simultaneously or successively, are fed to the one or more roller bodies (126). Method according to one of claims 15 or 16, characterized in that for regenerating one or more roller bodies (126) a plurality of regeneration units (156) by means of one or more Regenerierwagen (182) the one or more roller bodies (126) are supplied.