EP3337622A1

EP3337622A1 - Filter insert temperature control device, temperature control tunnel, and method therefor

Info

Publication number: EP3337622A1
Application number: EP16753869.3A
Authority: EP
Inventors: Apostolos Katefidis; Jürgen Röckle
Original assignee: Eisenmann SE
Current assignee: Eisenmann SE
Priority date: 2015-08-17
Filing date: 2016-08-05
Publication date: 2018-06-27
Also published as: WO2017029132A1; DE102015010717A1

Abstract

The invention relates to a filter insert temperature control device (100) for controlling the temperature of a filter insert (20) which can be removed from a filter device, wherein the temperature control chamber has a connector (104) for inflow air and a connector (106) for outflow air. Furthermore, the invention relates to a device (14) for controlling the temperature of objects, in particular for drying coated vehicle bodies (11), having a housing, a temperature control tunnel (24) which is accommodated in the housing and through which an object (11) can be transported in a transport direction by means of a transport system, and at least one tunnel temperature control device for controlling the temperature of the object. It is provided according to the invention that there is a filter insert temperature control device (100) which is configured to subject a filter insert (20) which can be removed from a filter device to a temperature control operation, wherein there is an inflow air line (105) from the temperature control tunnel (24) to the filter insert temperature control device (100) and/or an outflow air line (107) from the filter insert temperature control device (100) to the tunnel temperature control device (40). The invention also relates to a corresponding method.

Description

FILTER INSERT TEMPERING DEVICE, TEMPERATED TUNNEL, AS WELL

PROCEDURE FOR THIS

BACKGROUND OF THE INVENTION

1. Field of the invention

The invention relates to a filter element tempering device, a device for tempering objects, in particular for drying coated vehicle bodies, and a corresponding method.

2. Description of the Related Art

In the following, the invention will be described using the example of vehicle bodies as objects, wherein "vehicle bodywork" is to be understood here not only as a complete vehicle body, but also as parts of a body which are suitable for drying in such a device.

In the manual or automatic application of paints on objects, a partial flow of the paint, which generally contains both solid and / or binder and solvent, is not applied to the article. This partial flow is called "overspray" in the professional world. Here and below, overspray is always understood in the sense of a disperse system, such as an emulsion or suspension or a combination thereof. The overspray is detected by the air flow in the paint booth and fed to a separation, so that the air can be optionally returned to the coating booth after a suitable conditioning.

In particular, in systems with a larger paint consumption, for example in systems for painting vehicle bodies, wet separation systems on the one hand or electrostatic dry separators on the other hand are preferably used in a known manner. In known wet scrubbers relatively much energy is required to circulate the required, quite large amounts of water. The treatment of the rinse water is due to the high use of paint binding and detackifying chemicals and through the Lackschlammentsorgung costly. Furthermore, the air absorbs a lot of moisture due to the intensive contact with the rinse water, which in turn results in a high energy consumption for the air treatment in the recirculation mode. In the case of electrostatically operating dry separators, the paint overspray must be continuously removed from the separation surfaces, which is usually associated with structurally complex measures and can accordingly be prone to failure. In addition, the energy consumption in such separators is relatively high.

As an alternative to these separation systems devices are known which work with exchangeable filter cartridges, which are exchanged after reaching a limit load with overspray against unloaded filter cartridges and disposed of or possibly recycled. The treatment and / or disposal of such filter modules can be energetically and also with regard to the required resources more compatible than the effort in a wet scrubber or an electrostatic working separation device.

Such filter cartridges are supplied with the cabin air laden with overspray, which flows through the filter cartridges and leaves as exhaust air largely freed from overspray.

However, it has proven to be problematic that the properties of the material systems used for a coating are very different. For example, two-component coatings cure by means of a chemical reaction of the two components after a relatively short time. For example, other paint systems with different properties can remain in a liquid state for days without thermally initiated curing. Accordingly, the handling, transport and disposal of deposited paint is difficult if it remains wholly or partially in a liquid state.

It is an object of the invention to improve the handling, transportation and disposal of paint laden filter cartridges. SUMMARY OF THE INVENTION

The object is achieved by a filter element for temperature control of a filter device removable filter element according to the independent claim 1. Furthermore, the object is achieved by a device for tempering objects, in particular for drying coated vehicle bodies, according to independent claim 6. In addition, the invention is achieved by a method according to independent claim 13. Further embodiments of the invention are specified in the corresponding dependent claims.

The filter element for temperature control of a filter device removable filter element has a connection for supply air and a connection for exhaust air. It is thus possible to subject the filter element to a thermal treatment. This treatment may include, for example, an increase in temperature. When the temperature is increased, a hardening process can be initiated or carried out, for example, in the case of a non-hardened coating material located in the filter insert, and the coating material can be converted into a solid phase. By means of the supply air and exhaust air connections, for example, air may be introduced into the filter cartridge which is comparable in temperature to that used for regular drying of the coating of articles such as vehicle bodies.

In one embodiment of the invention can be provided that the supply air connection and / or the exhaust port can be connected to a device for controlling the temperature of objects. Thus, the air already used for the temperature control of the objects can be fed directly to the filter element temperature control device and / or the tempering air loaded with the gases released during the temperature control can be fed to the device for the temperature control of objects.

In one embodiment it can be provided that the filter insert at least partially has a filtrate in a liquid phase. The filter insert is preferably part of a filter system for filtering exhaust air of a paint shop, in particular for the separation of overspray. The filtrate can be designed so that it can be converted by tempering, in particular by an increase in temperature such as by heating, in a solid phase. The filter insert is preferably in a state in which its filter capacity is exhausted or almost exhausted.

A development of the invention provides that the filter element tempering device has its own or additional heating device. In this way, the temperature in the filter insert can be heated additionally or alternatively to the air that can be supplied via the supply air connection. The heating device can be activated as a function of the temperature of the air flowing in via the supply air connection.

The filter element tempering device or / and the heating device can be arranged in the filter insert. Alternatively or additionally, the filter element tempering device or / and the heating device can be arranged so that it surrounds the filter insert. Depending on the design of the filter insert so the heat transfer to the filter element can be optimized. In addition, the heating element can be designed to be placed.

In a further embodiment of the invention, a temperature control can be provided, in which a filter cartridge is transportable by means of a transport system. Thus, the filter cartridge can flow around and through.

The device for controlling the temperature of objects, in particular for drying coated vehicle bodies, has a housing and a temperature control tunnel accommodated in the housing, through which an object can be transported by means of a transport system in a transport direction. Furthermore, the device has a tunnel tempering device for tempering the object. According to the invention, it is provided that a filter element tempering device is provided, which is designed to subject a filter insert, which can be removed from a filter device, to a temperature control. In this way, the same advantages as described above can be achieved. A particularly advantageous embodiment results when the filter element temperature control device is connected to the tunnel temperature control device. Thus, it is possible to use the already prepared for the drying of the objects air for the temperature control of the filter cartridge.

For this purpose, it can be provided that an air supply line from the temperature control tunnel to the filter element temperature control device or / and an exhaust air line from the filter element temperature control device to the tunnel temperature control device are present. It may thus be provided on the one hand, to direct the existing air in the temperature control tunnel to the filter element. On the other hand, in addition or as an alternative, it is possible to supply the exhaust air of the tunnel tempering device, which is formed in the filter element temperature control device during the temperature control of the one or more filter elements, and optionally to subject it to a thermal aftertreatment.

In this context, it can be provided that the supply air line are connected directly to the temperature control tunnel and / or the exhaust air line directly to a heating unit of Tunneltemperiereinrichtung.

In one embodiment of the invention, it can be provided that a plurality of filter inserts is combined to form a filter element tempering station, to which a heating unit is assigned. Thus, a plurality of filter element tempering device stations and a plurality of heating units can be provided, wherein each filter element tempering device station is assigned a heating unit. Thus, each heater may dispose of the additional exhaust air produced by the respective filter conditioning station during the drying process.

Further embodiments provide that the filter element tempering device has a heating device for controlling the temperature of the filter insert and / or the heating device is arranged in the filter element or around the filter element. This results in the advantages already explained above. In the case of a sole temperature control of the heating insert via the heating device, an additional pollutant load of the air originating from the tempering tunnel can be avoided. For example, so in the case that from the Device for controlling the temperature of objects no or too little air is available, the temperature of the filter insert are made.

The method for tempering, in particular for drying, filter inserts comprises the following steps:

Extracting exhaust air from a device for tempering objects; Supplying the extracted exhaust air to a filter cartridge, wherein the filter cartridge is adapted to filter exhaust air of a paint shop; and performing a temperature, in particular a temperature increase, of the filter cartridge. Thus, the advantages already described above with reference to the filter element tempering device and to the device for tempering objects result.

In one embodiment of the method, the steps may be provided:

Removing the filter insert of a paint shop; and transferring the filter cartridge to a device for carrying out the temperature control of the filter cartridge.

In one embodiment of the method, it is particularly preferable for the filtrate to be at least partially transferred from a liquid phase into a solid phase when the temperature of the filter insert is being carried out.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the invention will be explained in more detail with reference to the drawings. In these show:

Figure 1 is a schematic representation of a first embodiment of the invention;

Figure 2 is a schematic representation of a second embodiment of the invention;

and

Figure 3 is a schematic representation of a third embodiment of the invention. DESCRIPTION OF PREFERRED EMBODIMENTS

FIG. 1 shows a schematic representation of a system 10 for coating vehicle bodies 11. The system 10 comprises a painting installation 12 for applying the coating - here: painting - to the vehicle bodies 11 and a dryer 14 for curing or drying the coating on the vehicle bodies 11th

The painting installation 12 has a spray booth 16, within which the actual coating process takes place. The resulting during the coating process in the spray booth 16 overspray is guided via a directed from top to bottom airflow from the spray booth 16 through an example by means of gratings air-permeable bottom and a separation or filter system 18. The filter system 18 has individual replaceable filter cartridges 20. Each of the filter cartridges 20 is assigned to an area in the spray booth and is flowed through by exhaust air flow taken from the corresponding cabin area. The filter inserts 20 may be formed, for example, as a hybrid filter for a combination of surface and depth filtering and have a flow labyrinth of compartment and chamber structures. Depending on the type of coating material, the filter cartridges have a separation efficiency of 0.5-2 mg / m ^{3 of} air and, depending on the operating model, a service life of one to several weeks. The filter inserts 20 are separable from the exhaust air flow of the spray booth by means of a shut-off device (not shown), so that, for example, one or more filter inserts 20 can be exchanged during an operating break of the spray booth 16.

If, above and below, the term "tempering" of a vehicle body is used, it is meant to bring about a specific temperature of the vehicle body that it initially does not possess. It may be a temperature increase or a temperature decrease. A "tempered air" is understood to mean that which has the temperature required for temperature control of the vehicle body. Depending on the intended use, the tempered air can also be an inert gas or the like. In the present case, the term "drying" refers to all processes in which the coating of the vehicle bodywork, in particular a lacquer, can be cured. The process of curing may include, for example, expulsion of solvents or crosslinking of the coating material.

The dryer 14, which is designed here by way of example for the drying of vehicle bodies 11, comprises a housing 22 in which a tempering tunnel 24 is accommodated. The tempering tunnel 24 is bounded laterally by two vertical longitudinal walls (not visible here), at the bottom by a floor 26 and at the top by a tunnel ceiling 28.

The coated vehicle bodies 11 are conveyed through the temperature control tunnel 24 by means of a transport system not explicitly shown. On the front sides of the tempering tunnel 24 are - generally not shown here - locks provided which allow the passage of the vehicle bodies 11 in the Temperiertunnel 24 in and out of this without much heat loss and with little exchange of atmosphere.

When drying freshly coated vehicle bodies 11, mainly solvents, but also coating components, are released into the air in the tempering tunnel 24. The thus loaded tunnel atmosphere is therefore sucked out of the tempering tunnel 14 by means of an exhaust system 32. The suction can be done on the tunnel ceiling 28 or on the floor 26 and is shown only schematically. The extraction system 32 feeds the dryer air removed from the tempering tunnel 24 via lines 34, for example, to thermal afterburning, in order to then discharge it into the environment via a heat exchanger 38.

In the temperature control 24 tempering, here designed as a heating units 40, arranged. The heating units 40 are arranged along a conveying direction F of the tempering tunnel 24 and remove air from the tunnel atmosphere in order to temper it in a heat exchanger 42 and to feed it back to the tempering tunnel 24 via a line 43. The heat exchanger 42 is heated by a heating element, such as a burner 44, which removes, for example, a combustion gas from a reservoir 46. The tempering tunnel 24 is shown here in detail and can be made longer depending on requirements.

The filter inserts 20 removed from the paint shop 12 can be fed manually or automatically to a filter insert temperature control unit 100. 1 has a connection 104 for supply air and a connection 106 for exhaust air. The ports 104, 106 may be formed, for example, in correspondence with ports provided in the paint shop 12. Alternatively, appropriate adapter may be provided. Air can thus flow into the filter insert 20 via the supply air connection 104 and can flow out via the exhaust air connection 106. The supply air connection 104 is connected to the temperature control tunnel 24 of the dryer 14 and thus removes air from the temperature control tunnel 24. The exhaust port 106 is connected via a line 107 to the heating unit 40. The heating unit 40 has a fan 45, which ensures via the line 107 for a flow through the temperature control chamber 102 of the filter element temperature control device 100. In line 107, a flap 108 for controlling the flow of air through the filter cartridge 20 is provided.

Optionally, means for monitoring the temperature and the pressure as well as the humidity may be provided in or on the filter element temperature control device 100.

Thus, in the embodiment of FIG. 1, the solvents and gases produced or released during the drying process of the filter insert 20 are fed to the heating unit 40 of the tempering tunnel 24. The conditioning of the filter element temperature control unit 100 supplied and discharged air via the provided for the temperature control 24 facilities of the dryer 14th

FIG. 2 shows a modified alternative embodiment of the filter element temperature control device 200, whose features, insofar as they are the same or comparable, have been increased by 100. The filter element tempering device 200 has attached or attachable heating elements 210. The heating elements 210 are tempered by the air conditioned by the tempering tunnel, for example by the heating unit 40 of the dryer 14 and temperature in turn the filter cartridge 20. This indirect temperature control has the advantage that the Temperiertunnelabluft is not additionally burdened with pollutants by the drying process. The heating elements 210 may also be assisted by electrical heaters.

FIG. 3 shows a further alternative embodiment of the filter element tempering device 300, the same or comparable features of which are increased by 100 and 200, respectively. The filter element tempering device 300 has one or more tempering chambers designed as heat chambers 312. The heat chambers are adjustable in terms of temperature and flow.

For all Filtereinsatztemperiereinrichtungen 100, 200, 300 in each heating unit 40 can with an exemplary recirculating air quantity of about 40,000 m ³ / h at least one Durchström- amount of 1 m ³ / h 1000 m ³ / h for the flow through the Filtereinsatztemperiereinrichtung 100, 200 , 300 be assigned. Due to the vacuum present in the tempering tunnel 24, any existing air leaks, for example in the filter insert 20, can be controlled. By means of the circulating air from the dryer 14, the filter insert 20 flows through or flows around and dried its contents. The escaping gases pass through the heating unit 40 as the rest of the exhaust air in the already existing in the dryer 14 exhaust air purification.

With correspondingly observed regulations, it is possible to flow through and / or flow around paint-laden filter cartridges 20 which are accommodated in a suitably sealed and insulated container. This also allows for easy fire protection.

Claims

A filter insert temperature control device (100) for controlling the temperature of a filter insert (20) removable from a filter device (18), the filter element tempering device (100) having a connection (104) for supply air and a connection (106) for exhaust air.

2. filter element according to claim 1, wherein the supply air connection (104) and / or the exhaust port (106) with a device (14) for controlling the temperature of objects (11) are connectable.

3. filter element tempering device according to any one of claims 1 or 2, wherein the filter cartridge at least partially has a filtrate in a liquid phase.

4. Filter element (200) according to any one of the preceding claims, comprising a heater (210) for the filter cartridge (20), wherein the heating device (210) in particular in the filter cartridge (20) or around the filter cartridge (20) around.

5. filter element according to one of the preceding claims, with a tempering (102), in which a filter insert (20) is transportable by means of a transport system.

6. Device (14) for tempering objects, in particular for drying coated vehicle bodies (11), with a housing (22); a tempering tunnel (24) accommodated in the housing (22), through which an object (11) can be transported by means of a transport system in a transporting direction (F); at least one tunnel tempering device (40) for tempering the object (11), characterized in that a filter element temperature control device (100, 200, 300) is provided, which is designed to subject a filter device (18) removable filter element (20) of a temperature.

7. Apparatus according to claim 6, wherein the filter element tempering device (100) is designed according to one of claims 1-5.

8. Apparatus according to claim 6 or 7, wherein the filter element tempering device (100) is connected to the tunnel tempering device (40).

9. Device according to claims, wherein an air supply line (105) from the temperature control tunnel (24) to the filter element temperature control device (100) or / and an exhaust duct (107) from the filter element temperature control device (100) to the tunnel tempering device (40) are present.

10. The device according to claim 9, wherein the supply air line (105) directly to the Temperiertunnel (24) and / or the exhaust duct (107) are directly connected to a heating unit (40) of Tunneltemperiereinrichtung.

11. The apparatus of claim 10, wherein a plurality of filter cartridges (20) a

Heating unit (40) is assigned.

12. Device according to one of the preceding claims, wherein the Filtereinsatztemperiereinrichtung (200, 300) has a heating device (210, 312) for controlling the temperature of the filter insert (20), wherein the heating device (210) in particular in the filter insert (20) or to the filter cartridge (20) is arranged around.

13. Method for tempering, in particular for drying, filter inserts, with the steps:

Extracting exhaust air from a device for tempering objects;

Supplying the extracted exhaust air to a filter cartridge, wherein the filter cartridge is adapted to filter exhaust air of a paint shop; and Performing a temperature, in particular a temperature increase, of the filter cartridge.

14. The method according to claim 13, comprising the steps:

Removing the filter insert of a paint shop; and. Spend the filter insert to a device for carrying out the temperature control of the filter cartridge.

15. The method according to any one of claims 13 or 14, wherein in carrying out the temperature control of the filter cartridge, the filtrate is at least partially transferred from a liquid phase to a solid phase.