DE102007040896A1 - Filter unit for use in wet paint overspray separating device, has partition wall separating receiving chamber from flow chamber of device for separating wet paint overspray, and inlet opening through which raw gas flow enters into unit - Google Patents

Abstract

The unit has a filter element receiving chamber for receiving an auxiliary material that concedes raw gas. An auxiliary material receptacle receives the auxiliary material that concedes the raw gas, where the raw gas passes through a filter element (172). A partition wall separates the receiving chamber from a flow chamber (128) of a wet paint overspray separating device (126), where the raw gas flow is flown through the flow chamber before entering into the unit. The raw gas flow from the flow chamber enters into the unit through an inlet opening. Independent claims are also included for the following: (1) a device for separating a wet paint overspray from a raw gas flow containing overspray particle (2) a method for producing a device for separating wet paint overspray from a raw gas flow containing overspray particle.

Description

The The present invention relates to a device for separating Wet paint overspray from a raw gas stream containing overspray particles.

Such a device is for example from the DE 10 2005 048 579 A1 known.

at This known device is the dry separation of the Wet paint overspray from the raw gas stream of a spray booth Painting plant in a filter device, after having a nozzle assembly previously a flowable, particulate, referred to as "precoat" material Filterhilfsmaterial in the raw gas stream was delivered.

This Auxiliary material serves as a barrier to the surfaces Depose the filter element to prevent these surfaces from passing through Stick adhering overspray particles.

By Periodic cleaning of the filter elements of the filter device the mixture of auxiliary material and wet paint overspray passes from the filter elements in an auxiliary material receptacle, from it can be sucked to the nozzle assembly for to be reused as an auxiliary material. Furthermore, the located in the auxiliary material receptacle Mixture of auxiliary material and wet paint overspray by means of compressed air pulses be whirled out of a compressed air lance so as to be from the auxiliary material receptacle ascend the filter elements and settle there.

at the known device are the filter elements on the side walls a flow chamber arranged below the application area of the paint shop attached, at intervals, which of the individual Length of the flow chamber and the individual Depend on the number of filter elements. The steering of the raw gas stream through the flow chamber by means of flow baffles, extending over the entire length of the flow chamber extend and therefore to the individual length of the Flow chamber must be adjusted.

hereby Every device of this kind must be planned individually, and the individual components of the device must be in the specific dimensions of the individual device coordinated Dimensions are produced individually.

Of the present invention is based on the object, a possibility for a particularly simple and rapid installation of a device for Separating wet paint overspray from an overspray particle-containing To create raw gas stream.

• – einen Filterelementaufnahmeraum zur Aufnahme mindestens eines Filterelements zum Abtrennen des Oversprays aus dem Rohgasstrom;
• – mindestens einen Hilfsmaterialaufnahmebehälter zur Aufnahme eines Hilfsmaterials, das dem Rohgasstrom zugegeben wird, bevor der Rohgasstrom das mindestens eine Filterelement passiert;
• – mindestens eine Trennwand zum Abtrennen des Filterelementaufnahmeraums von einer Strömungskammer der Vorrichtung zum Abtrennen von Nasslack-Overspray, welche von dem Rohgasstrom vor dessen Eintritt in die Einheit durchströmt wird; und
• – mindestens eine Einlassöffnung, durch welche der Rohgasstrom aus der Strömungskammer in die Einheit eintritt.

This object is achieved according to the invention by a unit for use in a device for separating wet paint overspray from a stream of raw gas containing overspray particles, the unit comprising:

• - A filter element receiving space for receiving at least one filter element for separating the overspray from the raw gas stream;
• - At least one auxiliary material receiving container for receiving an auxiliary material which is added to the raw gas stream before the raw gas stream passes through the at least one filter element;
• - At least one partition wall for separating the filter element receiving space from a flow chamber of the device for separating wet paint overspray, which is traversed by the raw gas stream before it enters the unit; and
• - At least one inlet opening through which the raw gas stream from the flow chamber enters the unit.

By Use of one or preferably several units of these Kind, which in one or more rows in a longitudinal direction the device for separating wet paint overspray lined up become, in a simple and rapid manner, a device for Separation of wet paint overspray with any raw gas cleaning capacity created.

By This modular design is such a modular device for the deposition of wet paint overspray, if necessary, even after the initial production by adding additional modules or units as desired expandable.

The unit according to the invention will be in the following also referred to as a module or as a filter module.

The Flow conditions of the raw gas stream in the Filter element receiving space of each unit remain from one Addition of additional capacity expansion units untouched, as these flow conditions essentially by the dimensioning of the inlet opening be determined by which the raw gas flow from the flow chamber enters the unit, and there each unit through its own partition from the flow chamber, which from the raw gas stream before Entry through the unit is flowed through, is separated.

Each of the units thus provides a self-sufficient filter device for separating wet paint over Spray from a raw gas stream containing overspray particles, which can be used individually or together with other units.

at A preferred embodiment of the invention provides that the inlet opening of the unit down through a lower Guide surface is limited.

For the desired steering of the raw gas stream in the interior the unit, in particular in the auxiliary material receptacle, into it is favorable, if the lower guide surface at least in sections inclined to the horizontal, namely in particular so that the lower guide surface - in the Flow direction of the raw gas stream seen - after is inclined down.

When It has proved particularly favorable when the lower Guide surface at least in sections at an angle of at least about 30 °, preferably below an angle of at least about 40 °, against the horizontal is inclined.

Further It has proven to be beneficial if the lower baffle is at least partially formed on a guide element, which to one side over a support structure of the unit protrudes.

One Such guide element can in particular as an inlet slope be educated.

at a preferred embodiment of the invention Unit is provided that the unit at least one in the filter element receiving space arranged filter element comprises.

Around the units in a simple way with each other or with between each connect two adjacent modules arranged partitions it is favorable if the unit is at least one Connecting element for connecting the unit to an adjacent one further unit or an adjacent partition.

One such connecting element may in particular be a part of a supporting structure form the unit.

For example it can be provided that the connecting element as a substantially vertical extending support is formed.

Further the connecting element can be a contact surface for application to a contact surface of an adjacent unit or to have an adjacent partition.

Especially to such a flat contact surface and sufficient provide mechanical stability can, it is convenient if the connecting element at least in sections, a substantially U-shaped Cross section has.

Around individual units as needed, for example for repair and / or maintenance purposes, in a simple manner from one another Being able to dissolve connected units is it is advantageous if the connecting element releasably with an adjacent unit or with an adjacent partition is connectable.

Especially can be provided that the connecting element with an adjacent Unit or with an adjacent partition is screwed.

By a screw connection of the connecting elements with each other is the increased static load from the fasteners.

at A preferred embodiment of the invention provides that the unit comprises a support structure comprising at least one the other elements of the unit, preferably all other elements the unit wears.

The unit according to the invention is preferably preassembled, so that after preassembly as a whole in a preassembled Condition can be handled and transported.

The Unit according to the invention is particularly suitable for use in a device for separating wet paint overspray from a overspray particles containing raw gas stream, which at least a unit according to the invention and a flow chamber, which of the raw gas stream before it enters the at least a unit is flowed through.

at a preferred embodiment of such a device is provided in that the device comprises at least two units arranged in a longitudinal direction follow the device.

there may be provided in particular that at least two units are arranged directly next to each other.

there The two units can be detachable with each other be connected.

Alternatively, it can be provided that the device has at least one partition wall through which the filter element receiving spaces of at least two in a longitudinal direction of the device successive units of a are separated. Such a separation of the filter element receiving spaces of adjacent units avoids longitudinal flows between the filter element receiving spaces of the units and thus mutual influencing of the flow conditions in the units. As a result, a defined zone separation of the crude gas flow is achieved by the units, which allows a well-defined adjustment of the raw gas flow within the individual units.

Further can be provided that the device also at least one Dividing wall, through which in a longitudinal direction the device successive sections of the flow chamber are separated from each other.

there can be the partitions, which in a longitudinal direction the device successive sections of the flow chamber separate from each other, be identical to the partitions, which the filter element receiving spaces in the longitudinal direction separating the device from one another.

at a preferred embodiment of the invention Device is further provided that the device for separating from wet paint overspray includes at least two units in a transverse direction of the device are spaced from each other.

there can by changing the distance in the transverse direction the device spaced units the overall arrangement the units to the width of the flow chamber of the device be adapted without this being a change needed at the units themselves.

Preferably are the at least two units arranged in this case so that their respective inlet openings face each other are.

Of the between the two with their inlet openings each other facing units remaining area of the flow chamber forms a narrowed section of the flow chamber, in which the flow velocity of the raw gas stream, which flows to the inlet openings of the units, is higher than in one above the units Section of the flow chamber. This way will be in the raw gas stream generates an increasing velocity profile, which offers the advantage that auxiliary material and overspray lighter kept away from the inlet openings and in the units be withheld.

at A preferred embodiment of the invention provides that between at least two units arranged in a transverse direction of the Device are spaced apart, one by an operator walkable footbridge is arranged.

By a variation of the width of the walkway can be the overall arrangement from the units and the walkway between them to any width of the flow chamber of the device adapted for the separation of wet paint overspray.

Also The amount of total arrangement out of the units can be easy to any height of the flow chamber of the Adapted for deposition of wet paint overspray, only by the length of the supports of the support structure of the Units is changed or, for example, extension pieces be attached to these columns.

The Device according to the invention for separating Wet paint overspray is particularly suitable for use in one Plant for painting objects, in particular of Vehicle bodies, which at least one application area for applying wet paint to the objects to be painted and at least one device according to the invention for separating wet paint overspray.

Preferably is the flow chamber of the device for separating Wet paint overspray at least partially below the application area arranged.

Especially It is favorable if the entire device for separating of wet paint overspray including the flow chamber and the units within the vertical projection of the application area the paint shop is arranged.

Of the The present invention is based on the further object of a method for producing a device for separating wet paint overspray to provide a raw gas stream containing overspray particles, which is particularly easy and quick to carry out.

• – Vormontieren mindestens einer erfindungsgemäßen Einheit an einem Herstellort;
• – Transportieren der mindestens einen vormontierten Einheit von dem Herstellort zu einem Montageort;
• – Anordnen der mindestens einen vormontierten Einheit in einer Arbeitsposition am Montageort.

This object is achieved according to the invention by a method for producing a device for separating wet paint overspray from a crude gas stream containing overspray particles, which method comprises the following method steps:

• - Pre-assembly of at least one unit according to the invention at a place of manufacture;
• - Transporting the at least one preassembled unit from the place of manufacture to a mounting location;
• - Arranging the at least one preassembled unit in a working position at the installation site.

On this way, the apparatus for separating wet paint overspray in a simple way from one of the desired capacity corresponding number of pre-assembled units become.

Especially can be provided that at least two pre-assembled units manufactured at a place of manufacture, transported to the place of installation, in arranged a working position and with each other or with a interposed partition wall are connected.

additional For this purpose, the pre-assembled units with a support structure the application area of a paint shop are connected.

• a) Vormontieren mindestens einer erfindungsgemäßen Einheit;
• b) Abbau eines Teils der bestehenden Vorrichtung, so dass der von einer vormontierten Einheit in ihrer Arbeitsposition beanspruchte Raum freigegeben wird;
• c) Anordnen einer vormontierten Einheit in der freigegebenen Arbeitsposition;
• d) Verbinden der vormontierten Einheit mit der Tragekonstruktion für den Applikationsbereich;
• e) Wiederholung der Schritte b), c) und d), bis alle vormontierten Einheiten in ihrer Arbeitsposition angeordnet und mit der Tragekonstruktion für den Applikationsbereich verbunden sind.

The object to provide a particularly simple and rapid method for producing a device for separating wet paint overspray, is also by a method for converting an existing apparatus for separating wet paint overspray from a raw gas stream containing overspray particles, which a support structure for an application area, which comprises the following method steps:

• a) pre-assembly of at least one unit according to the invention;
• b) dismantling a part of the existing device so that the space occupied by a preassembled unit in its working position is released;
• c) arranging a preassembled unit in the released working position;
• d) connecting the preassembled unit to the support structure for the application area;
• e) repetition of steps b), c) and d) until all pre-assembled units are arranged in their working position and connected to the support structure for the application area.

On this way, an existing device for depositing Wet paint overspray by the modular structure described above Device for dry separation of wet paint overspray replaced are, without this required, the application area dismantled the plant for painting vehicle bodies or create a new steel structure for the application area to have to.

By the variability of the height of the invention Units and by the possibility of two in the transverse direction the apparatus for separating wet paint overspray from each other place spaced units at any distance from each other, can the inventive device for depositing from wet paint overspray to an application area with any Dimensions are adjusted in the longitudinal and transverse directions.

Especially is it possible to wet an existing device Separating wet paint overspray by means of a washout vorste described first, modular device for dry separation of wet paint overspray to replace.

Further Features and advantages of the invention are the subject of the following Description and the drawings of exemplary embodiments.

In show the drawings:

1 a schematic perspective view of a Lackierkabine with an underneath arranged device for separating wet paint overspray from a raw gas stream containing overspray particles, which comprises a arranged under the spray booth flow chamber and on both sides of the flow chamber in each case three filter modules;

2 a schematic vertical cross section through the plant 1 ;

3 one of the 2 corresponding schematic vertical cross section through the plant 1 , wherein in addition the respective flow direction of the raw gas, the exhaust air emerging from the filter modules and the supply air fed into the flow chamber to produce transverse air curtains are indicated by arrows;

4 a schematic plan view from above of the plant from the 1 to 3 ;

5 a schematic side view of the plant from the 1 to 4 ;

6 a schematic perspective view of the device for separating wet paint overspray from an overspray particles containing raw gas stream, which under the spray booth of the system from the 1 to 5 is arranged and which has the flow chamber in the longitudinal direction of the flow chamber consecutive sections dividing transverse partitions;

7 a schematic perspective view of a single filter module, which is provided for the arrangement between two adjacent further filter modules (center module);

8th a schematic perspective view of a single filter module, the Arrangement is provided adjacent to another filter module and on the opposite side forms an end of a filter module row (corner module);

9 a schematic vertical cross section through a filter module;

10 a schematic vertical cross section through a filter module and the adjacent region of the flow chamber, in which the respective local flow direction of the raw gas stream is indicated by arrows;

11 a schematic perspective view of an edge region of an inlet opening of a filter module;

12 a schematic front view of a filter module;

13 a schematic vertical section through an auxiliary material receptacle with arranged inside the container level sensor and Aufwirbelungseinrichtung;

14 a schematic side view of a revision door of the auxiliary material receiving container 13 , with level sensor and fluidizing device held on the inspection door;

15 a schematic plan view of the outside of the inspection door 14 ;

16 a schematic plan view from above on a in the auxiliary material receiving container 13 arranged collecting grid;

17 a schematic representation of an apparatus for supplying fresh auxiliary material from a storage container to located in their working position auxiliary material storage containers of in 13 represented type;

18 a schematic representation of a discharge device for discharging mixed with overspray auxiliary material from the auxiliary material receiving containers to a collecting container;

19 a schematic representation of a filter module and arranged downstream of the filter module exhaust duct with blower and various devices for monitoring the operating condition of the blower and a device for supplying compressed air to the filter elements, to a Aufwirbelungseinheit and to a fluid bottom of the filter module;

20 a schematic vertical cross-section through a second embodiment of an apparatus for separating wet paint overspray from an overspray particles-containing exhaust air stream, which includes inclined Strömungsleitbleche for guiding a cross-flow of air and a walkable bridge with inclined top between the filter modules;

21 a schematic vertical cross-section through an alternative embodiment of an auxiliary material receiving container, which is provided with a pneumatically operated agitator for mixing the material located in the auxiliary material receiving container and for comparing the template;

22 a schematic plan view from above of the auxiliary material receptacle with pneumatically operated agitator 21 ;

23 a schematic vertical section through a further alternative embodiment of an auxiliary material receiving container, which is provided with an electrically operated shaft and paddles for mixing the material in the auxiliary material receiving container and for equalizing the template; and

24 a schematic plan view from above of the auxiliary material receptacle with electrically driven shaft 23 ,

Same or functionally equivalent elements are in all figures denoted by the same reference numerals.

One in the 1 to 19 shown as a whole with 100 designated plant for spray painting vehicle bodies 102 comprises a conveying device shown purely schematically 104 , by means of which the vehicle bodies 102 along a conveying direction 106 through an application area 108 one as a whole with 110 designated paint booth can be moved.

The application area 108 is the interior of the paint booth 110 , which in a direction perpendicular to the conveying direction 106 , the longitudinal direction of the paint booth 110 corresponds, extending horizontal transverse direction 112 on both sides of the conveyor 104 through each cabin wall 114 is limited.

On both sides of the conveyor 104 are in the paint booth 110 spray-painting 116 , For example, in the form of painting robots arranged.

By means of a (only partially shown) Umluftkreislaufs an air flow is generated, which is the application area 108 essentially vertically interspersed from top to bottom, like this in 3 through the arrows 118 is indicated.

This airflow decreases in the application area 108 Paint overspray in the form of overspray particles. The term "particles" encompasses both solid and liquid particles, in particular droplets.

at When using wet paint, the wet paint overspray consists of paint droplets. Most of the overspray particles have a largest Dimension in the range of about 1 μm to about 100 μm.

The one with the overspray particles from the application area 108 laden exhaust air flow is referred to below as the raw gas stream. The flow direction of the raw gas stream is in the 3 and 10 through arrows 120 shown.

The raw gas stream leaves the paint booth 110 down and gets into one as a whole 126 designated device for separating wet paint overspray from the raw gas stream, which below the application area 108 is arranged.

The device 126 includes a substantially cuboid flow chamber 128 , which are in the conveying direction 106 over the entire length of the paint booth 110 extends and in the transverse direction 112 through vertical side walls 130 is limited, which essentially with the side cabin walls 114 the paint booth 110 aligned, leaving the flow chamber 128 has substantially the same horizontal cross-sectional area as the paint booth 110 and substantially completely within the vertical projection of the base of the paint booth 110 is arranged.

How best 6 It can be seen on both sides of the flow chamber 128 in each case several, for example three, filter modules 132 arranged, which two are in the longitudinal direction 134 (which with the conveying direction 106 matches) of the device 126 for removing wet paint overspray extending module rows 136 form.

Each of the module rows 136 includes two corner modules 138 , which each one end of a module row 136 form, and at least one between two adjacent filter modules 132 arranged center module 140 ,

To avoid longitudinal flow of the raw gas stream in the longitudinal direction 134 the flow chamber 128 and to avoid flows of the raw gas between the individual filter modules 132 can be in the transverse direction 112 extending vertical transverse partitions 142 be provided, which between each two in the longitudinal direction 134 successive filter modules 132 are arranged and the flow chamber 128 in longitudinal direction 134 successive flow chamber sections 144 divide.

Through these cross dividing walls 142 is a defined setting of the raw gas flow for each individual filter module 132 regardless of the raw gas flow through the other filter modules 132 possible.

How best 2 can be seen, is between the two module rows 136 an accessible by an operator bridge 146 intended.

Around the sections of the dock 146 , which in the successive flow chamber sections 144 are arranged to be able to commit to continuous, are in the transverse partitions 142 Passage doors 148 intended ( 6 ).

The flow chamber 128 at its front end or at its rear end final end walls 150 the flow chamber 128 are with access doors 152 provided by which an operator from the outside into the flow chamber 128 can get.

Each of the filter modules 132 is as a preassembled unit 154 formed, which is manufactured at a location remote from the installation of the paint shop and transported as a unit to the installation of the paint shop. At the installation site, the preassembled unit 154 arranged in the intended working position and with one or more adjacent preassembled units 154 or with the intermediate partitions arranged therebetween 142 as well as with a carrying structure of the application area 108 connected.

The structure of a filter module 132 becomes the example of a middle module 140 with reference to the following 7 and 9 to 16 described: The module comprises a support structure 156 from two vertical rear supports 158 and two vertical front pillars 160 , which at their upper end over horizontal cross struts 162 each with one of the rear supports 158 are connected ( 7 ).

Furthermore, the front supports 160 connected at their upper ends by means of another (not shown) cross member.

Also the rear supports 158 are by means of (not shown) transverse struts or by means of a (not shown) connecting frame connected to each other.

The cross struts at the top of the support structure 156 carry a horizontal ceiling wall 164 ,

At the front of the front supports 160 is a vertical front wall 166 of the filter module 132 held.

The ceiling wall 164 and the front wall 166 form partitions 168 of the filter module 132 which one inside the filter module 132 arranged filter element receiving space 170 from outside the filter module 132 located area of the flow chamber 128 separate.

In the filter element receiving space 170 of the filter module 132 are several, for example ten, filter elements 172 arranged in two rows one above the other, which of a common body 174 standing at the backs of the rear props 158 is held, stand in a horizontal direction.

The filter elements 172 For example, they may be formed from sheets of sintered polyethylene provided with a polytetrafluoroethylene (PTFE) membrane on their outer surface.

The PTFE coating serves the filter class of the filter elements 172 to increase (ie reduce their permeability) and also to prevent the permanent adhesion of the separated from the raw gas stream wet paint overspray.

Both the base material of the filter elements 172 as well as their PTFE coating have a porosity, so that the raw gas through the pores in the interior of the respective filter element 172 can get.

Around To prevent the sticking of the filter surfaces are the same also with a barrier layer in the raw gas stream emitted Auxiliary material provided. This preferably particulate Auxiliary material is usually also called a "precoat" material designated.

The barrier layer forms during operation of the device 126 by deposition of the in the raw gas stream 120 discharged auxiliary material to the filter surfaces and prevents the filter surfaces stick by adhering wet paint overspray.

Auxiliary material from the raw gas stream 120 also sits on the insides of the ceiling wall 164 and the front wall 166 of the filter module 132 where it also prevents adhesion of wet paint overspray.

When Auxiliary material can be used basically any medium which is capable of doing so, the liquid content of the wet paint overspray.

Especially come as auxiliary materials such as lime, stone powder, aluminum silicates, aluminum oxides, Silicon oxides, powder coating or the like into consideration.

alternative or in addition to this, as an auxiliary material for receiving and / or binding the overspray also particles with a Cavity structure and relative to their outer dimensions large internal surface can be used, for example zeolites or other hollow, for example, spherical bodies from polymers, glass or aluminum silicate and / or natural or synthetically produced fibers.

alternative or in addition to this, as an auxiliary material for receiving and / or binding the overspray also chemically with the Overspray reacting particles are used, for example chemically reactive particles of amine, epoxide, carboxyl, hydroxyl or Isocyanate groups, chemically reactive particles made with octylsilane post-treated alumina or solid or liquid Mono-, oligo- or polymers, silanes, silanols or siloxanes.

The Auxiliary material preferably consists of a plurality of auxiliary material particles, which has a mean diameter in the range of, for example about 10 μm to about 100 μm exhibit.

In order to be able to add the auxiliary material to the raw gas stream without the risk of the auxiliary material being in the application area 108 the paint shop 100 is every filter module 132 with one on the support structure 156 held auxiliary material receptacle 176 provided, for example, which has a funnel-shaped shape in the form of an inverted truncated pyramid ( 13 ).

The four trapezoidal side walls 178 of the auxiliary material accommodating container 176 are inclined to the vertical at an angle of at least about 60 °.

The height of the auxiliary material receptacle 176 is for example about 1.1 m.

The upper edges of the side walls 178 enclose an access opening 180 of the auxiliary terialaufnahmebehälters 176 through which the raw gas stream laden with overspray 120 in the auxiliary material receptacle 176 enter and escape from it.

The substantially horizontally oriented floor 182 is as a porous fluid soil 184 formed, which is durchspülbar with a gaseous medium, in particular with compressed air, to the interior 186 of the auxiliary material accommodating container 176 fluidized auxiliary material arranged locally and different filling heights of the auxiliary material within the auxiliary material receiving container 176 to equalize.

During operation of the system 100 For example, the fluid tray is put into operation intermittently, for example, three times a minute for about two seconds each.

To prevent the fluid floor 184 is damaged by falling larger objects, is at a distance of, for example, 20 cm above the fluid bottom 184 a collecting grid or retention grid 187 arranged, which extends in the horizontal direction over the entire cross section of the interior 186 of the auxiliary material accommodating container 176 extends and a plurality of rows of honeycomb or rectangular passage openings 189 for the passage of auxiliary material through the retaining grid 187 having. The passage openings are arranged offset from one another row by row and have a size of, for example, approximately 30 mm × 30 mm ( 16 ).

To access the interior 186 of the auxiliary material accommodating container 176 for maintenance purposes, is one of the sidewalls 178 provided with an inspection opening, which during operation of the filter module 132 through a revision door 188 with a handle 190 is closed (see the 13 to 15 ).

How out 15 can be seen, is the revision door 188 by means of terminals 192 with wing nuts 194 on the associated side wall 178 of the auxiliary material accommodating container 176 kept detachable.

At the inspection door 188 is a compressed air pipeline 196 held, which to a Aufwirbelungseinrichtung 198 leads ( 14 ).

The Aufwirbelungseinrichtung 198 serves to deliver compressed air pulses in the underlying auxiliary material to whirl up this auxiliary material and so in the through the auxiliary material receptacle 176 introduce introduced raw gas stream.

In addition, by the Aufwirbelung of the auxiliary material by means of the Aufwirbelungseinrichtung 198 a homogenization of the container in the Hilfsmaterialauf 176 existing mixture of auxiliary material and bound overspray achieved.

During operation of the system 100 becomes the Aufwirbelungseinrichtung 198 intermittently, for example, four times a minute for about 5 seconds each, put into operation.

The Aufwirbelungseinrichtung 198 includes several, for example two, outlet nozzles 200. for compressed air, which are designed as conical nozzles and each one down to the ground 182 of the auxiliary material accommodating container 176 can generate expanding compressed air cone.

Preferably, the outlet nozzles 200. designed and arranged so that the from the outlet nozzles 200. compressed air cone produced together the bottom surface of the auxiliary material receiving container 176 completely paint over.

Furthermore, on the compressed air pipeline 196 a bracket 202 for a level sensor 204 arranged, which a rod-shaped sensor element 206 and a sensor housing 208 with sensor electronics housed therein ( 14 ).

The level sensor 204 is designed as an analog, in particular capacitive, sensor and serves to generate a signal which corresponds in each case to a value from a plurality of discrete filling level heights or from a continuum of filling levels, to the filling level of the auxiliary material in the auxiliary material receiving container 176 to be able to determine as accurately as possible.

The rod-shaped sensor element 206 of the level sensor 204 is substantially vertically aligned and as far as possible from the side walls 178 of the auxiliary material accommodating container 176 near the middle of the interior 186 of the auxiliary material accommodating container 176 arranged to the measurement result of the level sensor 204 as little as possible by edge effects ( 13 ).

The rod-shaped sensor element 206 of the level sensor 204 is substantially perpendicular to the horizontal floor 182 of the auxiliary material accommodating container 176 aligned.

The signal coming from the level sensor 204 is generated, via a (not shown) signal line to an electrical connection box 209 of the filter module 132 that is attached to the main body 174 the filter elements 172 is arranged (see 7 ), and from there to a control device of investment 100 , in the 19 shown schematically and with 210 is designated transmitted.

To the in the filter module 132 entering raw gas flow targeted into the interior 186 of the auxiliary material accommodating container 176 to direct into and direct access of the raw gas flow from the flow chamber 128 to the filter elements 172 To prevent this is every filter module 132 further with a slot-shaped inlet opening 212 provided as an inlet duct 214 is formed, for example, as in particular from 9 can be seen, in the flow direction of the raw gas flow up to a bottleneck 240 has narrowing flow-through cross-section.

Alternatively or additionally, it can also be provided that the inlet channel 214 a in the flow direction of the raw gas flow from a bottleneck 240 has expanding through-flow cross-section.

The inlet channel 214 is down through an inlet slope 216 extending from the front supports 160 the support structure 156 extends obliquely upward at an angle of, for example, about 40 ° to about 65 ° with respect to the horizontal, and by a to the lower end of the inlet slope 216 adjoining lower baffle 218 limited, which is more inclined to the horizontal than the inlet slope 216 , for example, at an angle of about 55 ° to about 70 °, and which has an upper, substantially vertically aligned section 220 a side wall 178 of the auxiliary material accommodating container 176 protrudes out and into the interior 186 of the auxiliary material accommodating container 176 protrudes.

In this way, the lower baffle acts 218 as a retaining element 222 , which auxiliary material from the auxiliary material receptacle 176 from the inlet opening 212 keeps away and prevents swirling auxiliary material on the side of the inlet opening 212 along the side wall 178 from the auxiliary material receptacle 176 get out.

In addition, the lower baffle prevents 218 a tearing of the raw gas flow after passing the inlet slope 216 and ensures a directed raw gas flow into the auxiliary material receptacle 176 into it.

The lower baffle 218 has a depth (ie, an extension in the flow direction of the raw gas flow) of, for example, about 100 mm.

The inlet slope 216 and the lower baffle 218 extend in the longitudinal direction 134 the flow chamber 128 over substantially the entire length of the inlet opening 212 from, for example, about 1 m to about 2 m, which is nearly the extent of the entire filter module 132 in the longitudinal direction 134 equivalent.

The top of the inlet slope 216 and the top of the lower baffle 218 together form a lower guide surface 224 the inlet opening 212 which the inlet opening 212 limited downwards and in its upper section 226 passing through the inlet slope 216 is formed, with respect to the horizontal an inclination of about 40 ° to about 65 ° and in its lower portion 228 passing through the lower baffle 218 is formed, a greater inclination relative to the horizontal of about 55 ° to about 70 °.

At the top, the inlet opening 212 through the lower edge of the front wall 166 and through one of the lower edge of the front wall 166 diagonally down into the interior of the filter module 132 protruding upper baffle 230 limited.

The upper baffle 230 is as well as the lower baffle 218 inclined at an angle of, for example, about 55 ° to about 70 ° to the horizontal and extending in the longitudinal direction 134 over substantially the entire width of the inlet opening 212 for example, 1 m or 2 m.

The upper baffle 230 has a depth (ie, an extent along the flow direction of the raw gas flow) of, for example, about 150 mm.

The lower side of the upper baffle 230 forms an upper guide surface 232 which the inlet opening 212 limited to the top and inclined at an angle of, for example, about 55 ° to about 70 ° to the horizontal.

Through this upper guide surface 232 for the raw gas stream is achieved that the raw gas flow is not on the front wall 166 of the filter module 132 but directly into the auxiliary material receptacle 176 is directed into it.

The upper baffle 230 also serves as a filter shielding element 234 as it is so formed and at the inlet opening 212 arranged is that it prevents that from entering the filter module 132 entering raw gas directly to the filter elements 172 flows.

Furthermore, the upper baffle is used 230 as a rejection element 236 which of the filter elements 170 cleaned material, which auxiliary material and containing the auxiliary material bound overspray particles, from the inlet opening 212 keeps.

From the filter elements 172 on the top of the upper baffle 230 falling material is due to the inclination of the upper baffle 230 in the auxiliary material receptacle 176 directed.

During operation of the filter module 132 are both the upper guide surface 232 as well as the top of the upper baffle 230 provided with a coating of the auxiliary material, so that these surfaces of the upper baffle 230 Easy to clean and no overspray directly on the top baffle 230 sticking.

How best 12 can be seen, includes the filter module 132 also two cover elements 238 in the form of approximately triangular cover plates, which the left and the right lower corner of the inlet opening 212 cover so that auxiliary material and overspray from the raw gas flow from these corner areas of the inlet opening 212 be kept away and deposits of auxiliary material and overspray particles in these corners and outside of the filter module 132 on the inlet slope 216 be prevented.

The tops of the cover elements 238 are aligned obliquely to the vertical and oblique to the horizontal and each have a surface normal, which in the outer space of the filter module 132 is directed upward.

By the above-described embodiment of the geometry of the inlet opening 212 will reach that inlet opening 212 a bottleneck 240 at which the flow-through cross-section of the inlet opening 212 smallest and therefore the raw gas velocity is greatest.

Preferably is the raw gas velocity in the bottleneck of about 2 m / s to about 8 m / s, in particular from about 3 m / s to about 5 m / s.

In this way, it is effectively prevented that auxiliary material from the interior of the filter module 132 , which forms a closed box, in the flow chamber 128 and from there into the application area 108 arrives. The resuspension of the auxiliary material in the auxiliary material receptacle 176 and the cleaning of the filter elements 172 can therefore be done at any time, without the supply of raw gas to the filter module 132 or even the operation of the spray painting equipment 116 in the application area 108 to have to interrupt.

Furthermore, characterized in that the raw gas stream in the auxiliary material receiving container 176 directed out of the inlet opening 212 outlet, ensures that a diversion of the raw gas flow in the interior 186 of the auxiliary material accommodating container 176 he follows. As a result, a sufficient amount of auxiliary material, by the swirling of the auxiliary material in the receptacle 176 template is generated, entrained by the raw gas stream.

The raw gas flow from the flow chamber 128 through the inlet opening 212 into the interior of the filter module 132 is in 10 represented as the result of a flow simulation. It can clearly be seen that in the interior of the filter module 132 forms a flow roll whose horizontal axis is slightly lower than the upper edge of the auxiliary material receiving container 176 ,

On the inlet opening 212 opposite side of the auxiliary material receiving container 176 the raw gas flow laden with auxiliary material flows out of the auxiliary material receptacle again 176 out and then spreads over the entire depth of the filter element receiving space 170 , causing a swirl around the filter elements 172 is formed and due to the high dynamics, the raw gas flow in the bottleneck 240 has received a homogeneous distribution of the auxiliary material to the individual filter elements 172 is guaranteed.

There are hardly any components of the filter module 132 In the flow path of the incoming crude gas flow, contamination of components is largely prevented by sticky paint and still a favorable for the filtration flow of the filter elements 172 receive.

Due to the fact that the mean flow direction of the through the bottleneck 240 into the filter module 132 entering raw gas stream is inclined at an angle of more than 40 ° to the horizontal, is prevented from being in the lower portion of the filter element receiving space 170 forms an airlock, which of the filter elements 172 cleaned material immediately back to the filter elements 172 back and to form opposite air vortices within the filter module 132 could lead.

At two in a row of modules 136 juxtaposed filter modules 132 in a simple way and stable to connect to each other or to a filter module 132 with an adjacent cross partition 142 To connect, includes the support structure 156 each filter module 132 at least one rear support 158 one vertically and in the transverse direction 112 aligned, substantially flat contact surface 242 having, which to a corresponding contact surface 242 one be adjacent filter module 132 or to an adjacent transverse partition 142 can be created ( 7 ).

In the contact area 242 are also passage openings 244 provided for the passage of fasteners, by means of which as the connecting element 246 serving rear prop 158 with a connecting element 246 an adjacent filter module 132 or with a neighboring transverse partition 142 is connectable.

The as a connecting element 246 serving rear prop 158 preferably has an approximately U-shaped profile.

How out 7 can be seen, has each middle module 140 two as connecting elements 246 serving rear supports 158 with U-shaped profiles whose open sides face each other so that the center module 140 on both sides with an adjacent further filter module 132 or with a cross partition 142 is connectable.

How out 8th can be seen, assigns each corner module 138 only one as a connection element 246 trained rear prop 158 with U-shaped profile on; the opposite rear support 158a which does not interfere with any adjacent filter module 132 still with a neighboring transverse partition 142 must be connected, for example, may have a T-shaped profile to increase their mechanical strength instead of a U-shaped profile.

For the rest, the corner modules are right 138 in terms of design and function with the center modules described in detail above 140 match.

In the operation of each filter module 132 the raw gas stream passes over 120 the filter surfaces of the filter elements 172 wherein both the entrained auxiliary material and the entrained wet paint overspray are deposited on the filter surfaces, and the filtered raw gas passes as exhaust air flow through the porous filter surfaces in the interiors of the filter elements 172 that with a cavity inside the main body 174 from which the filter elements 172 stand up, are connected. From this cavity, the purified exhaust air flow passes in each case an exhaust pipe 248 that of the main body 174 the filter elements 172 each filter module 132 to about the middle of the flow chamber 128 arranged and parallel to the longitudinal direction 134 the flow chamber 128 extending exhaust duct 250 leads (see in particular the 2 and 3 ).

As from the schematic representation of 19 can be seen, the cleaned of the wet paint overspray exhaust air from the exhaust duct 250 to an exhaust fan 252 from where the cleaned exhaust air via a (not shown) cooling register and a (not shown) supply line one above the application area 108 arranged (not shown) air chamber, the so-called plenum, is supplied.

From this air chamber, the purified exhaust air passes through a filter cover in the application area 108 back.

From the supply line branches a (not shown) exhaust duct through which a part of the purified exhaust air flow (for example, over a fireplace) is given to the environment.

This discharged to the environment part of the exhaust air flow is replaced by fresh air, which in the flow chamber 128 about two air curtain generating devices 254 is fed, each via a supply air line 256 are connected to a supply air system (not shown) ( 1 to 3 ).

Each of the air curtain generating devices 254 each includes one in the longitudinal direction 134 the flow chamber 128 extending supply air chamber, via the supply air line 256 is supplied with supply air and a gap 258 which extends along the longitudinal direction 134 and extending in the vertical direction in the range of, for example, about 15 cm to about 50 cm, in an upper portion 260 the flow chamber 128 opens, which up through the application area 108 and down through the ceiling walls 164 the filter modules 132 is limited.

The gap 258 each supply air chamber is just above the ceiling walls 164 the filter modules 132 arranged so that by the influx of supply air from the Zuluftkammern in a substantially horizontal direction along the tops of the ceiling walls 164 the filter modules 132 in the flow chamber 128 at the top of the filter modules 132 in each case an air curtain is formed, which of the respectively associated air curtain generating device 254 starting at a bottleneck 262 between the upper edges of the opposite rows of modules 136 is directed and thereby prevents the loaded with the wet paint overspray raw gas stream 120 from the application area 108 to the top of the filter modules 132 passes and the wet paint overspray from the raw gas stream 120 at the top of the filter modules 132 settles.

At the bottleneck 262 the flow chamber 128 takes the flow through the raw gas stream horizontal cross section of the flow chamber 128 abruptly, so that the flow velocity of the raw gas stream in the below the bottleneck 262 located lower section 263 the flow chamber 128 is significantly higher than in the above the bottleneck 262 located upper section 260 the flow chamber 128 ,

The mean flow direction of the air in the air curtain generating devices 254 generated transverse air curtains at the top of the filter modules 132 is in 3 through the arrows 264 illustrated.

The majority of through the application area 108 The air passed through is thus guided in a recirculating air circuit, which covers the application area 108 , the flow chamber 128 , the filter modules 132 , the exhaust pipes 248 , the exhaust duct 250 , the exhaust fan 252 as well as the supply line and the air chamber above the application area 108 comprising, wherein a constant heating of the guided air in the circulating air through the fresh air supply via the air curtain generating devices 254 is avoided.

Since the separation of the wet paint overspray from the raw gas stream 120 by means of the filter elements 172 dry, ie without leaching with a cleaning liquid occurs, the air guided in the recirculation air is not moistened when separating the wet paint overspray, so that no devices for dehumidifying the air circulated in the circulating air are required.

Further are also no devices for the separation of wet paint overspray from a washout cleaning fluid required.

Due to the fact that the horizontal cross section of the flow chamber through which the raw gas flow can flow 128 by the presence of the filter modules 132 below the bottleneck 262 lying lower section 263 the flow chamber 128 is significantly lower than in the upper section 260 the flow chamber 128 (for example, in the lower section 263 only about 35% to about 50% of the horizontal cross-sectional area of the flow chamber 128 in the upper section 260 is the same), the flow rate of the raw gas stream is on its way from the application area 108 through the flow chamber 128 up to the inlet openings 212 the filter modules 132 continuously increased, so that there is an increasing velocity profile in the raw gas stream.

This increasing velocity profile has the consequence that out of the filter modules 132 escaping particles not in the application area 108 can reach.

The speed of the raw gas flow is in the application area 108 and in the upper section 260 the flow chamber 128 for example, up to about 0.6 m / s, while in the lower section 263 for example, the flow chamber is in the range of about 0.6 m / s to about 3 m / s and in the inlet openings 212 the filter modules 132 rises to a maximum value in the range of about 3 m / s to about 5 m / s.

Because of the filter elements 172 in the filter modules 132 are completely housed, is an activation of the filter elements 172 by applying auxiliary material and cleaning the filter elements 172 at any time during the painting process in the application area 108 possible.

Is the width of the spray booth 110 ie their extension in the transverse direction 112 , changed, but still the same size filter modules 132 used; the adaptation of the device 126 for separating wet paint overspray takes place in this case only by increasing the distance between the two module rows 136 from each other and by broadening the walkway 146 ,

The velocity profile of the raw gas flow changes with such broadening of the spray booth 110 thus only in the area up to the walkway 146 ; from here, so in particular when passing the inlet openings 212 the filter modules 132 , the velocity profile of the raw gas flow depends only on the amount of raw gas flowing through per unit time, but not on the geometry of the flow chamber 128 ,

The distance of the (walk-in) ceiling walls 164 the filter modules 132 from the bottom edge of the paint booth 110 conveyed through vehicle bodies 102 is at least about 1.5 m for maintenance reasons.

The filter elements 172 are cleaned at certain time intervals when their load of wet paint overspray and auxiliary material has reached a predetermined level, compressed air pulses.

This cleaning can (depending on the pressure loss increase on the filter elements 172 ) take place, for example, once to six times per 8-hour working shift, ie approximately every 1 to 8 hours.

The required compressed air pulses are by means of a Abpulseinheit 266 , which on the main body 174 the filter elements 172 each filter module 132 is arranged, wherein the Abpulseinheit 266 capable of generating compressed air pulses to deliver compressed air pipes, which within the respective body 174 run and from the Abpulseinheit 266 into the interiors of the filter elements 172 to lead ( 19 ).

From the interiors of the filter elements 172 the compressed air pulses pass through the porous filter surfaces into the filter element receiving space 170 in which the barrier layer of auxiliary material and the wet paint overspray deposited on the filter surfaces is detached from the filter surfaces, so that the filter surfaces are set back into their cleaned-up original state.

The Abpulseinheit 266 includes an off-pulse valve 268 , over which the Abpulseinheit 266 Compressed air from a compressed air supply line 270 can be fed by a compressor 272 is fed (see 19 ).

To this compressed air supply line 270 is via a compressed air valve 274 also the compressed air pipeline 196 connected, which to the outlet nozzles 200. the Aufwirungungseinrichtung 198 leads.

Furthermore, to the Druckluftzuführleitung 270 also the fluid bottom 184 each auxiliary material receptacle 176 via one with a compressed air valve 276 provided compressed air line 278 connected.

By opening the Abpulsventils 268 , the compressed air valve 274 or the compressed air valve 276 can thus, alternately or simultaneously, a cleaning of the filter elements 172 , a Aufwirbelung the auxiliary material in the auxiliary material receptacle 176 or a fluidization of the auxiliary material in the auxiliary material receiving container 176 by means of the fluid bottom 184 to be triggered.

Between the mentioned compressed air valves and the compressor 272 is in the compressed air supply line 270 a check valve 280 arranged, which by the control device 210 can be controlled in the local control station.

The control device 210 locks by closing the shut-off valve 280 the compressed air supply from the compressor 272 to the mentioned compressed air consumers of a filter module 132 or all filter modules 132 if it finds that there is insufficient raw gas flow through the filter elements 172 is available.

To determine if sufficient raw gas flow through the filter elements 172 is present, for example, be provided that the control device 210 the operating state of the exhaust fan 252 supervised.

This monitoring of the operating state of the exhaust fan 252 can, for example, by means of a differential pressure gauge (PDIA) 282 done, which the pressure drop between the pressure side and the suction side of the exhaust fan 252 measures.

Alternatively or additionally, the operating state of the exhaust fan 252 from the control device 210 also by means of a current monitoring device (ESA) 284 and / or by means of a frequency converter (SC) 286 be monitored.

Furthermore, it can be provided that the absence of a sufficient raw gas flow through the filter elements 172 by means of a flowmeter (FIA) 288 which determines the gas flow through the exhaust air duct 250 or through one or more of the exhaust pipes 248 measures.

There is also the possibility of the lack of sufficient raw gas flow through the filter elements 172 by measuring the pressure drop across the filter elements 172 a filter module 132 or all filter modules 132 to investigate.

When the control device 210 due to the transmitted signals of the differential pressure gauge 282 , the current monitor 284 , the frequency converter 286 and / or the flowmeter 288 determines that the raw gas flow through the filter elements 172 is below a predetermined threshold, the compressed air supply to at least one of the filter modules 132 by closing the shut-off valve 280 blocked.

In this way it is prevented that auxiliary material by swirling by means of the Aufwirbelungseinheit 198 , by cleaning the filter elements 172 or by fluidizing the auxiliary material supply in the auxiliary material receiving container 176 in the flow path of the raw gas and in particular through the inlet opening 212 a filter module 132 in the flow chamber 128 and from there into the application area 108 arrives.

This blockage of compressed air supply can be used for all filter modules 132 together or for the individual filter modules 132 separated from each other. In the latter case, the determination of the lack of sufficient raw gas flow through the filter elements takes place 172 for each of the filter modules 132 separated, and it is either for each filter module 132 a separate compressor 272 provided or the compressed air supply lines 270 to the individual filter modules 132 are via separately switchable check valves 280 individually lockable or releasable.

The auxiliary material becomes in the device described above 126 to separate from Wet paint overspray exclusively within the filter modules 132 by swirling the auxiliary material in the respective auxiliary material receiving container 176 added to the crude gas stream.

To fresh auxiliary material in their working position within the filter modules 132 firmly mounted auxiliary material receptacles 176 to be able to supply, includes the device 126 for separating wet paint overspray an in 17 schematically illustrated auxiliary material feeding device 290 which a template container 292 includes, which may be formed as a blow-pot or as a simple fluidization container.

Blowpots are, for example, from the JP 02123025 A or the JP 06278868 A hitherto known and have been used in coating plants so far to promote powder coating to the application containers located in the vicinity of the atomizer. These are relatively small closable containers with an air-permeable bottom through which air is passed to fluidize the powder and deliver it to the container.

While a blowpot may be deflated by the pressure of the fluidizing air, otherwise the fluidizing container for material delivery will become a powder metering pump 293 downstream (see 1 ), such as those in the WO 03/024612 A1 described so-called DDF pump or another after the dense flow principle with suction / pressure change-promoting metering pump, as for example from the EP 1 427 536 B1 , of the WO 2004/087331 A1 or off 3 of the DE 101 30 173 A1 are known.

To fill the original container 292 is above it a larger reservoir (container or "big bag") 294 arranged for the fresh auxiliary material, from which in the simplest case, the material through a closable with a flap opening in the storage container (silo) 292 can trickle. To the storage container 292 Also, to be able to refill continuously during the material delivery and to avoid time losses during operation, but is preferably between the reservoir 294 and the original container 292 a mechanical conveyor 296 , For example, a rotary valve or a screw conveyor, arranged. When using such a conveyor advantageously a desired filling amount can be set, in the case of a rotary valve on the pre-determined capacity per cell.

The original container 292 is about one in two branches 298a . 298b branching main 300 , from the stubs 302 to each one of the auxiliary material storage container 176 with each of the auxiliary material receptacles 176 connected. In doing so, each of the branches leads 298a . 298b the main line 300 each to the auxiliary material receiving containers 176 a module row 136 ,

The main line 300 preferably consists of flexible hoses.

Therefor can hoses with an inside diameter up about 14 mm, in particular from about 6 mm to about 12 mm, to be used.

The stubs 302 can be tubular and are each equipped with a mechanical pinch valve 304 provided, wherein in the flow direction of the auxiliary material behind the branch of the respective spur line 302 in each case a second pinch valve 306 is arranged.

Further pinch valves 309 are at the junction of the two branches 298a . 298b the main line 300 arranged to these two branches 298a . 298b open or close as needed.

In the operation of the auxiliary material supply device 290 are the main one 300 and all stubs 302 initially empty. If a certain auxiliary material receptacle 176 is to be supplied with fresh auxiliary material, the main line is behind the branch point of the associated spur line 302 by closing the respective associated pinch valve 306 locked, the relevant stub line 302 by opening the associated pinch valve 304 opened and then the auxiliary material from the storage container 292 in the relevant auxiliary material receptacle 176 promoted.

Subsequently, the above-described conduction path in the relevant auxiliary material receptacle 176 emptied and rinsed. This offers the advantage that the amount of charge is always accurately determined and metered and that the line can not be blocked, as always a flush in the charged auxiliary material receptacle 176 he follows.

Each of the stubs 302 flows into one of the side walls 178 of the respective associated auxiliary material receiving container 176 , preferably in a region near the upper edge of the auxiliary material receptacle 176 , so that the largest possible amount of auxiliary material through the stub 302 can be supplied.

The stub line 302 , which to the last auxiliary material receptacle 176 a module row 136 leads, requires no pinch valve assembly, there to feed this last auxiliary material receiving container 176 just all in the main line 300 upstream of this auxiliary material on container 176 arranged pinch valves 306 and 309 need to be open.

Instead of the above-described pinch valve arrangements can at the branches of the auxiliary material pipe system also from the State of the art per se known mechanical Quetschweichen or be provided other forms of powder diverter.

To before the supply of fresh auxiliary material to an auxiliary material receptacle 176 The device, which accumulates therein, can be removed with overspray mixed auxiliary material and be able to lead to a disposal or reuse 126 for separating wet paint overspray, a further in 18 schematically illustrated auxiliary material discharge device 308 ,

The auxiliary material discharge device 308 in turn includes a suction fan 310 For example, a vacuum cleaner fan, which used auxiliary material from a main line 312 , which are divided into two branches 314a . 314b branches, into one under the suction fan 310 arranged collecting container 316 promotes.

One each of the branches 314a . 314b the main line 312 leads to the auxiliary material receptacles 176 a module row 136 and each has a stub line 318 , which by means of a pinch valve 320 is closable to each of the auxiliary material receptacles 176 the relevant module series 136 connected.

At the end of each branch 314a . 314b the main line 312 is each a ball valve 322 arranged, through which if necessary conveying air into the main line 312 can be supplied to the suction of the auxiliary material from the main line 312 to the suction fan 310 to facilitate.

The stubs 318 each open just above the fluid bottom 184 in the interior 186 of the respective auxiliary material receiving container 176 , preferably in a corner region of the auxiliary material receiving container 176 in which two side walls 178 contiguous.

Particularly favorable for an efficient and as complete as possible extraction of the used auxiliary material from an auxiliary material receptacle 176 is it when the stub line 318 branched into two suction lines, each at a different corner area in the interior 186 of the auxiliary material accommodating container 176 empties.

If a certain auxiliary material receptacle 176 is used by used, mixed with overspray auxiliary material to be emptied, so this is the pinch valve 320 the respectively assigned stub line 318 opened and by means of the suction fan 310 in the auxiliary material receptacle 176 existing material through the stub line 318 and the main line 312 sucked and into the collection container 316 promoted.

The suction process is by closing the respective associated pinch valve 320 completed.

During the suction process, the fluid bottom 184 of the relevant auxiliary material receptacle 176 permanently put into operation, ie flows through with compressed air during the entire suction process to fluidize the material to be sucked and to make good flowability.

Furthermore, the suction of the used material from the auxiliary material receiving container 176 be supported by the fact that during the suction process, the Aufwirbelungseinrichtung 198 of the relevant auxiliary material receptacle 176 continuous or intermittently (for example, 6 × 5 seconds per minute) is put into operation, because by the application of material to be sucked with compressed air from above through the outlet nozzles 200. the Aufwirungungseinrichtung 198 the material loosened and to the mouth openings of the stub line 318 is moved.

If the suction of the used auxiliary material from one of the auxiliary material receiving container 176 not working properly, as indicated by the associated level sensor 204 indicates a no longer sinking level, the operation of the device 126 for separating wet paint overspray not be interrupted. Rather, auxiliary material may instead be from another auxiliary material receptacle 176 be sucked, which on the same branch 314a or 314b the main line 312 connected. As a result, in many cases, the blockage of the material transport from the blocked auxiliary material receiving container 176 be corrected so that then the material from the previously blocked auxiliary material receptacle 176 can be sucked off.

The from the auxiliary material receptacle 176 extracted material containing auxiliary material together with overspray particles, can either be disposed of or - optionally after a treatment - at least partially reused in the coating plant.

Furthermore, it can be provided to select the materials of the auxiliary material so that they are recycled after use in the coating plant for purposes other than for the coating of workpieces you can. For example, the used auxiliary material can be used as an insulating material or, for example, in the brick or cement industry or the like, be used thermally, wherein the bound to the auxiliary material wet paint overspray can also be used as an energy source in a combustion process required for the production.

After sucking the used auxiliary material from an auxiliary material receptacle 176 becomes the same by means of the above-described auxiliary material supply device 290 filled with fresh auxiliary material, for example, up to a Erstbefüllungsfüllstand of about 50% of the total capacity of the auxiliary material receiving container 176 ,

By the accumulation of wet paint overspray, which has a lower density than the auxiliary material, in the mixture of auxiliary material and overspray, which in the auxiliary material receptacle 176 is present, the density of this mixture decreases during the operation of a filter module 132 getting farther, leaving the barrier layer, which is on the filter elements 172 of the filter module 132 builds up, has an ever larger volume.

The level of material in the auxiliary material receptacle 176 immediately before a cleaning process of the filter elements 172 therefore decreases more and more.

At a predetermined residual level, for example, about 10% of the capacity of the auxiliary material receptacle 176 is equivalent, the overspray mixed auxiliary material from the auxiliary material receptacle 176 aspirated as described above. By sucking off before a cleaning process of the filter elements 172 is achieved that mainly the unusable material that is in the auxiliary material receptacle 176 has accumulated and not the barrier layer on the filter elements 172 forms, from the auxiliary material receptacle 176 is removed.

As an alternative to this procedure, it may also be provided that the fill level of the material in the auxiliary material receptacle 176 each after a cleaning process of the filter elements 172 of the filter module 132 is measured and a suction is initiated when a predetermined maximum level, for example, 90% of the maximum capacity of the auxiliary material receiving container 176 , is reached.

In any case, the level of the material in the auxiliary material receptacle 176 , which releases a suction, by means of the level sensor 204 in the respective auxiliary material receptacle 176 is arranged, determined.

An in 20 in a schematic cross section illustrated second embodiment of a system 100 for painting vehicle bodies 102 differs from the first embodiment described above in that above the filter modules 132 separate transverse air curtains 324 which serve the purpose of the air curtain generating devices 254 supplied supply air to the bottleneck 262 between the upper section 260 and the lower section 263 the flow chamber 128 to lead.

These transverse air curtain baffles 324 are at an angle of, for example, about 1 ° to about 3 ° to the horizontal to the respective adjacent side wall 130 the flow chamber 128 inclined so that from the top of the cross air veils 324 getting liquids not to the bottleneck 262 but to the side walls 130 drain away.

In this way it is ensured that, for example, due to a Schlauchplatzers effluent paint from the application area 108 or extinguishing water not in the lower section 263 the flow chamber 128 and from there into the filter modules 132 but rather on the sides of the flow chamber 128 can drain away.

Further, in this embodiment, the walk-on bridge 146 between the module rows 136 in two substantially mirror-symmetrical to a vertical longitudinal center plane 326 the flow chamber 128 trained halves 328a . 328b each at an angle of, for example, about 1 ° to, for example, about 3 ° with respect to the horizontal to the longitudinal center plane 326 are inclined so that from the top of the walkway 146 reaching liquids, such as paint or fire water, not on the side edges 330 of the walkway 146 away to the inlet openings 212 the filter modules 132 but in the middle of the walkway 146 be withheld.

Both the walk-in dock 146 as well as the cross air veiling baffles 324 can additionally in the longitudinal direction 134 the flow chamber 128 be inclined to the horizontal, so that the fluids located on these elements can flow due to the force of gravity to a drain opening.

For the rest, the in 20 illustrated second embodiment of a system 100 to the La car bodywork 102 in terms of structure and function with in the 1 to 19 illustrated in the first embodiment, reference is made to the above description in this regard.

The auxiliary material receptacles 176 the filter modules 132 the plants described above 100 for painting vehicle bodies 102 may alternatively or in addition to the in 13 shown fluid floor 184 also other facilities 332 for mixing the in the auxiliary material receiving container 176 have located material, for example, in the 21 and 22 schematically illustrated pneumatically operated agitator 334 ,

The pneumatically operated agitator 334 includes a stirrer 336 with at least two rotationally fixed to a substantially vertically aligned stirring shaft 338 arranged agitator paddles 340 and one in the 21 and 22 purely schematically illustrated Rührwerkturbine 342 , by means of which the stirring shaft 338 is drivable to a rotational movement about its vertical axis.

The agitator paddles 340 are at an angular distance of, for example, about 180 ° and in the axial direction of the stirring shaft 338 offset from each other at the stirrer shaft 338 arranged.

The Rührwerctbine 342 is compressed air via a compressed air supply line 344 fed.

Will the Rührwerkturbine 342 via the compressed air supply line 344 Compressed air supplied, so the supplied compressed air offset the Rührwerkturbine 342 in a rotational movement about the vertical axis, whereupon the rotationally fixed with the Rührwerkturbine 342 connected stirrer shaft 338 also sets in motion.

This is the in the auxiliary material receptacle 176 material through the rotating agitator paddles 340 mixed, and the surface of the auxiliary material receptacle 176 material is smoothed. In auxiliary material receptacle 176 submerged material bridges are broken up.

In this way, a good mixing of the material in the auxiliary material receptacle 176 and equalizing the level of material within the auxiliary material receptacle 176 achieved.

By the pneumatic drive of the agitator 334 Sparking will occur within the auxiliary material receptacle 176 avoided and ensures sufficient explosion protection.

One in the 23 and 24 illustrated alternative embodiment of a device 332 for mixing the in the auxiliary material receiving container 176 located material includes an electric motor 346 located laterally adjacent to the auxiliary material receptacle 176 is arranged and its output shaft 348 through a side wall 178 of the auxiliary material accommodating container 176 passed through and with several, for example four, paddles 350 is provided, the rotationally fixed and at an angular distance of, for example, each about 90 ° and in the axial direction of the output shaft 348 offset from each other on the output shaft 348 are arranged.

By turning the output shaft 348 by means of the electric motor 346 around their substantially horizontally oriented axis are the paddles 350 rotated, causing the paddles 350 in the auxiliary material receptacle 176 Mix the material and smooth the surface and in the auxiliary material receptacle 176 Break up material bridges.

The conversion of an existing device 126 for separating wet paint overspray from a raw gas stream containing overspray particles, using the filter modules 132 the plants described above 100 in the following way:
First, a part of the existing device is dismantled, so that of a filter module 132 in its working position claimed space is released.

Subsequently, a filter module 132 arranged in the released in this way working position and with the support structure for the application area 108 , in particular with the cabin walls 114 the paint booth 110 , connected.

Subsequently, these steps are repeated until all filter modules 132 arranged in their working position and with the support structure for the application area 108 are connected.

In this way, for example, an existing device for wet separation of wet paint overspray by the above-described modular device 126 be replaced for dry separation of wet paint overspray, without this being necessary, the application area 108 the plant 100 for painting vehicle bodies 102 to disassemble.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102005048579 A1 [0002]
• - JP 02123025A [0211]
• - JP 06278868A [0211]
• WO 03/024612 A1 [0212]
• - EP 1427536 B1 [0212]
• WO 2004/087331 A1 [0212]
• DE 10130173 A1 [0212]

Claims (28)

Unit for use in a device ( 126 ) for separating wet paint overspray from a raw gas stream containing overspray particles ( 120 ), where the unit ( 154 ) comprises: - a filter element receiving space ( 170 ) for receiving at least one filter element ( 172 ) for separating the overspray from the raw gas stream ( 120 ); At least one auxiliary material receptacle ( 176 ) for receiving an auxiliary material which is the raw gas stream ( 120 ) is added before the crude gas stream ( 120 ) the at least one filter element ( 172 ) happens; - at least one partition ( 168 ) for separating the filter element receiving space ( 170 ) from a flow chamber ( 128 ) of the device ( 126 ) for separating wet paint overspray, which of the raw gas stream ( 120 ) before entering the unit ( 154 ) is flowed through; and - at least one inlet opening ( 212 ), through which the crude gas stream ( 120 ) from the flow chamber ( 128 ) into the unit ( 154 ) entry. Unit according to claim 1, characterized in that the inlet opening ( 212 ) down through a lower guide surface ( 224 ) is limited. Unit according to claim 2, characterized in that the lower guide surface ( 224 ) is inclined at least in sections against the horizontal. Unit according to claim 3, characterized in that the lower guide surface ( 224 ) is inclined at least in sections at an angle of at least approximately 30 ° to the horizontal. Unit according to one of claims 2 to 4, characterized in that the lower guide surface ( 224 ) at least partially on a guide element ( 216 ) is formed, which to one side over a support structure ( 156 ) the unit ( 154 ) protrudes. Unit according to one of claims 1 to 5, characterized in that the unit ( 154 ) at least one in the filter element receiving space ( 170 ) arranged filter element ( 172 ). Unit according to one of claims 1 to 6, characterized in that the unit ( 154 ) at least one connecting element ( 246 ) for connecting the unit ( 154 ) with an adjacent further unit ( 154 ) or an adjacent partition ( 142 ). Unit according to claim 7, characterized in that the connecting element ( 246 ) a part of a support structure ( 156 ) the unit ( 154 ). Unit according to one of claims 7 or 8, characterized in that the connecting element ( 246 ) as a substantially vertically extending support ( 158 ) is trained. Unit according to one of claims 7 to 9, characterized in that the connecting element ( 246 ) a contact surface ( 242 ) for application to a contact surface ( 242 ) of an adjacent unit ( 154 ) or to an adjacent partition wall ( 142 ) having. Unit according to one of claims 7 to 10, characterized in that the connecting element ( 246 ) Has at least partially a substantially U-shaped cross-section. Unit according to one of claims 7 to 11, characterized in that the connecting element ( 246 ) detachable with an adjacent unit ( 154 ) or with an adjacent partition ( 142 ) is connectable. Unit according to claim 12, characterized in that the connecting element ( 246 ) with an adjacent unit ( 154 ) or with an adjacent partition ( 142 ) is screwed. Unit according to one of claims 1 to 13, characterized in that the unit ( 154 ) a support structure ( 156 ). Device for separating wet paint overspray from a stream of raw gas containing overspray particles ( 120 ) comprising at least one unit ( 154 ) according to one of claims 1 to 14 and a flow chamber ( 128 ), which of the raw gas stream ( 120 ) before entering the at least one unit ( 154 ) is flowed through. Device according to claim 15, characterized in that the device ( 126 ) at least two units ( 154 ), which in a longitudinal direction ( 134 ) of the device ( 126 ) follow one another. Apparatus according to claim 16, characterized in that at least two units ( 154 ) are arranged directly next to each other. Apparatus according to claim 17, characterized in that at least two units ( 154 ) are releasably connected together. Device according to one of claims 15 to 18, characterized in that the device ( 126 ) at least one partition wall ( 142 ), through which the filter element receiving spaces ( 170 ) of at least two in a longitudinal direction ( 134 ) of the device ( 126 ) successive units ( 154 ) are separated from each other. Device according to one of claims 15 to 19, characterized in that the device ( 126 ) at least one partition wall ( 142 ), through which in a longitudinal direction ( 134 ) of the device ( 126 ) successive sections ( 144 ) the flow chamber ( 128 ) are separated from each other. Device according to one of claims 15 to 20, characterized in that the device ( 126 ) at least two units ( 154 ), which in a transverse direction ( 112 ) of the device ( 126 ) are spaced from each other. Apparatus according to claim 21, characterized in that at least two units ( 154 ) are arranged so that their respective inlet openings ( 212 ) face each other. Device according to one of claims 21 or 22, characterized in that between at least two units ( 154 ) a walk-in dock ( 146 ) is arranged. Plant for painting objects, in particular vehicle bodies ( 102 ) comprising at least one application area ( 108 ) for applying wet paint to the objects to be painted and at least one device ( 126 ) for separating wet paint overspray according to any one of claims 15 to 23. Plant according to claim 24, characterized in that the flow chamber ( 128 ) of the device ( 126 ) for separating wet paint overspray at least partially below the application area ( 108 ) is arranged. Method for producing a device ( 126 ) for separating wet paint overspray from a stream of raw gas containing overspray particles ( 120 ), comprising the following method steps: preassembling at least one unit ( 154 ) according to one of claims 1 to 14 at a place of manufacture; Transporting the at least one pre-assembled unit ( 154 ) from the place of manufacture to a place of assembly; Arranging the at least one pre-assembled unit ( 154 ) in a working position at the installation site. Method according to claim 26, characterized in that at least two preassembled units ( 154 ) produced at a place of manufacture, transported to the installation site, arranged in a working position and with each other or with a partition ( 142 ) get connected. Method for converting an existing apparatus for separating wet paint overspray from a raw gas stream containing overspray particles ( 120 ), which has a support structure for an application area ( 108 ), comprising the following method steps: a) pre-assembly of at least one unit according to one of claims 1 to 14; (b) dismantling of a part of the existing device so that it is replaced by a pre-assembled unit ( 154 ) in its working position claimed space is released; c) arranging a preassembled unit ( 154 ) in the released work position; d) connecting the preassembled unit ( 154 ) with the support structure for the application area ( 108 ); e) repeating steps b), c) and d) until all pre-assembled units ( 154 ) in its working position and with the support structure for the application area ( 108 ) are connected.