EP2078609B1 - Decentralised cleaning system - Google Patents

Description

The invention relates to an arrangement on a printing press with a process fluid cleaning device, in particular a dampening solution cleaning device on an offset printing press, a printing press with such an arrangement, a combined process fluid purification and treatment device and a process for the purification of process fluid in particular dampening solution.

In the prior art, dampening units are used in offset printing machines. The task of the dampening unit is to apply a dampening solution evenly to the printing plate of an offset printing press. The dampening solution is e.g. via a water box, nozzles or similarly applied to a first roller. A water film is applied as uniformly as possible by the roller over various other rollers on the printing plate of the printing press.

Excess dampening solution is normally collected, cleaned, processed and fed back to the dampening unit.

Since, during operation, contamination of the fountain solution, e.g. As a result of color components and paper dust, the soiled dampening solution is generally removed, e.g. cleaned by filtration.

The DE 100 61 870 A1 discloses a cleaning system in which a feed pump removes fountain solution from a buffer and pumps the dampening water into a cleaning unit. In the cleaning unit, a further pump is provided, which presses the fountain solution through a pressure filter. According to the disclosure of this document, the entire fountain solution flow is passed through the cleaning unit. Such a cleaning unit must therefore a have certain size and is relatively expensive to produce.

In contrast, a cleaning unit is known in which the fountain solution from a central tank, from which the printing units of a printing press are fed, is conveyed by means of a pump and passed through various cleaning devices. The cleaned fountain solution is returned to the central tank after cleaning. The disclosed device has the disadvantage that the fountain solution must be conveyed through a drain from the central tank, which is regularly arranged in a certain area of the central tank and therefore only removes dampening water in this particular area, so that dampening water from other areas in the central tank proportionally led to a lesser extent by the cleaning device and therefore not cleaned. This applies, for example, to the dampening water in the region of a dampening water level in the central tank, since the flow is generally arranged clearly below the dampening water level.

FIG. 1 shows a schematic representation of a dampening solution cleaning and processing plant, as it is commonly used in the prior art in printing machines. In this case, a number of individual processing equipment A is shown, each associated with a printing unit D of the printing press. Also shown are a centrally provided cleaning system R in the interior of which a schematically illustrated settling tank S, in which suspended particles settle and are separated from the dampening solution as part of a pre-cleaning, and a cross-flow filter unit Q are shown.

Since it is very complicated and expensive to produce such cleaning systems R with a cleaning performance which corresponds to the entire or the entire dampening solution stream to be cleaned, conventional arrangements of printing machines are provided with cleaning systems R which have only a significantly lower cleaning performance. Dampening agent, which is obtained at the printing press and can not be cleaned immediately, is stored in a process fluid buffer memory P and cleaned in printing pauses.

The purified dampening solution is in the in FIG. 1 shown after cleaning a process fluid buffer Z and stored there stored until it is used again in the next printing process. A process fluid buffer memory P therefore has at least one volume which is equal to or greater than the product of the time of operation multiplied by the volume flow difference from the total dampening solution flow to be cleaned and the cleaning performance of the connected cleaning system. The process agent buffer Z has conventionally this volume, but it may be slightly smaller or omitted, if the purified dampening solution is partially or wholly absorbed in the individual treatment plants A.

Line connections L lead from not shown collecting devices to the printing units the dampening solution flow in the process fluid buffer memory P and the process fluid buffer Z back to the printing units D.

The EP 1 591 244 A2 describes a method for cleaning the dampening solution of a printing press with an automatically eintleerenden separator, which separates the dirt particles and oil residues from the dampening solution and as a dirt and dampening mixture a dirt and dampening solution container and initiates the remaining wet Mitel in a dampening solution, the dirt and dampening solution in which the soil and dampening solution container is brought to the layered settling and wherein the dampening solution-containing layer is transferred by an overflow in the dampening solution collecting container. In this case, a device comprises a dampening solution tank from which is withdrawn via a line using a pump fountain solution and fed to a centrifugal separator. The separator is connected via separate lines with a dampening solution tank and a dirt and dampening solution tank. Cleaned dampening solution is fed directly into the dampening solution collecting tank and in the separator separated dirt particle dampening solution mixture is directed into the dirt and dampening solution tank. The fountain solution container is over a line connected to the dampening solution tank, so that the purified dampening solution can be pumped back into the dampening solution tank. The document mentions that the dampening solution tank is connected to a printing unit of a printing press so that fountain solution can be supplied to the printing unit and used dampening solution can be returned from the printing machine to the dampening solution tank. Details about such a connection are not described in the document.

In the DE 40 38 021 A1 a device for the foam-free recirculation of a dampening medium from a printing press is described. A wet offset printing machine with six printing units will be shown. The dampening units are located in a wet medium supply circuit with a supply line, which comes from a cooling and conditioning unit and to which all six dampening units are connected. For the return of the dampening medium, two return lines leading back to the cooling and conditioning device can be provided. These return lines open into a flow-stabilized reservoir. From the reservoir leads a line through a filter and an adjoining cooling section. The storage tank is cooled by the cooling unit.

The DE 100 61 870 A1 describes a method and a device for the filtration of dampening solution, which is conveyed by a feed pump from a fountain solution tank of a printing press batch by line. In the context of a fountain solution circulation is described, which includes several dampening units. In this case, the dampening units fresh dampening solution from a processing unit is supplied to the dampening, which flows via an overflow into an intermediate container. From the intermediate container is always when the liquid level of the fountain solution in the intermediate container exceeds a predetermined maximum level, fountain solution pumped through a pump through a filter unit to the treatment unit. When the liquid level of the dampening solution in the intermediate tank falls below a predetermined minimum level, the pump is switched off again.

The DE 198 12 034 A1 describes a medium cycle with a box into which a metering roller of a dampening unit dives, wherein the metering roller is connected via an applicator roll with the printing form cylinder in operative connection. The box is equipped with a drain line and in the box an overflow system is arranged. The drain line opens into a reservoir from which the box is in turn supplied via a supply line with process fluid. The reservoir is used for storage and cooling of the medium.

There are still a variety of other devices known which are intended to solve common problems or offer detailed solutions. There is no particular general direction in the prior art that is common to different approaches. The technical development concerning the dampening solution supply of printing machines is not yet completed.

It is in the printing industry, especially in offset printing, the use of dampening solutions, which have an alcohol constituent, a problem, since such additives are considered harmful to health and the environment. One aim of the development is therefore to reduce the alcohol constituent in the dampening solution and / or the dampening solution consumption, which has the disadvantage that humidifiers with a reduced alcohol content are more prone to soiling due to microorganisms.

In addition, during operation, larger amounts of dampening solution, which must be renewed at certain intervals, especially if they have soiling. The costs associated with disposal and renewal are considerable, so that even minor improvements in dampening solution supply make economic sense.

task

It is an object of the invention, an arrangement on a printing press, components of such an arrangement, a printing machine with such Arrangement and to provide a method for the design and operation of such an arrangement, wherein the arrangement ensures a low consumption of processing agents and contamination in the process fluid can be avoided or reduced.

Solution of the task

The object is achieved by the devices and the method according to the independent claims. Advantageous embodiments are disclosed in the subclaims.

A first aspect of the invention relates to an arrangement on a printing machine, wherein the arrangement has a first process fluid inlet, a first process fluid outlet and a first process fluid purification device, which are associated with a first printing unit of the printing press, wherein the first process fluid inlet is designed such that the first printing unit in Operation of the printing press can be supplied via the first process fluid inlet with a first process fluid flow, wherein the first process fluid flow is designed so that the entire process fluid incurred in the first printing unit during operation of the printing press in the form of a first Prozeßfluidabstroms over the first process fluid flow of the first process fluid cleaning device can be fed wherein the first process fluid purifying device has a purifying performance equal to or greater than the first process fluid effluent, and wherein the first process fluid purifying device and the Pr ozessfluidzulauf communicate with each other in such a way that the cleaned in the first process fluid cleaning device first process fluid effluent is recirculated into the first process fluid inlet,
wherein the arrangement has a second process fluid inlet, a second process fluid outlet and a second process fluid cleaning device associated with a second printing unit of the printing press, wherein the second process fluid inlet is configured such that the second printing unit in the operation of the printing press via the second process fluid inlet with a second Process fluid flow can be supplied, wherein the second process fluid flow is designed such that the entire incurred at the second printing unit during operation of the printing press process fluid in the form of a second Prozeßfluidabstroms on the second process fluid flow to the second process fluid cleaning device can be fed, the second process fluid cleaning device has a cleaning performance, which is equal to or greater than the second process fluid effluent and wherein the second process fluid purification device and the second process fluid inlet communicate with each other such that the second process fluid effluent purified in the second process fluid purification device is recirculatable to the second process fluid inlet.

The entire process fluid to be cleaned at the first printing unit during operation of the printing press essentially comprises the entire contaminating process fluid arising at the first printing unit. Disregarded remain fluid streams, which are consumed in the machine, leakage flows or fluid streams, which are passed to the process fluid cleaning device and recirculated without cleaning. A process fluid cleaning device refers to a device in the contamination of the process fluid, in particular a dampening solution, which can occur, for example, by color components and paper dust are eliminated. For this purpose, the soiled dampening solution is cleaned, for example by filtering in the process fluid cleaning device. Such a process fluid purification device preferably comprises a separator and / or a cross-flow filter and / or a filter unit with exchangeable filters and / or a cascade system. The cleaning performance, which could also be called cleaning capacity, denotes the process fluid volume or the process fluid mass, which can be cleaned by the process fluid purification device per unit time. In other words, the cleaning performance or cleaning capacity of the process fluid cleaning device is dimensioned such that the first process fluid outflow (also fluid flows denote volume or mass per unit time) can be cleaned by the process fluid purification device essentially in real time. The cleaning capacity of the first cleaning device is Therefore, substantially equal to or greater than the contaminated process fluid volume obtained at the first printing unit during operation of the printing press per unit time. In a cleaning performance of the first cleaning device, which is designed slightly smaller than the resulting first process fluid effluent, the excess portion of the process fluid may preferably in a sump of the dampening unit, in a separation vessel of the cleaning device or in others Caches are cached. For example, smaller tips of the process fluid effluent can be compensated. However, preferred is an arrangement that is designed so that the resulting process fluid effluent including possible peak currents can be cleaned in real time. Accordingly, the accumulated polluted amount of fluid per unit time is substantially equal to or less than the amount of fluid that can be cleared by the first process fluid purification device per unit time.

The purified process fluid stream is recirculated and provided to the first process fluid inlet. In this case, the fluid streams defined in this way are regarded as discharging the fluid volume or the fluid mass after the time, or at least only mean volumes or masses averaged over short periods of a printing machine operating time. By this arrangement, a decentralized process fluid purification can be provided, in which large, centrally provided storage container (eg for temporary storage of contaminated and / or purified process fluid) and a corresponding piping can be avoided. The phrase "recirculating in the first process fluid inlet" is to be understood such that the described arrangement is preferably a circuit, in the sense that the circulating process fluid, preferably fountain solution, as far as it is not consumed, is continuously circulated during operation. Such a "recirculation into the first process fluid inlet" can take place directly, for example, if no process fluid treatment device is provided between the first process fluid purification device and the first printing unit, or the dampening solution can be recycled at another point into the circulation in such a way that the dampening solution travels on its way enters the process fluid inlet, for example via a process fluid treatment device described below. The circuit is preferably an open circuit in the case of a dampening solution circuit. This means that a portion of the dampening solution can be transferred to the printing process, for example via the moistening during the printing process, and then usually can no longer be recycled. Also conceivable losses due to evaporation, leakage or the like. More dampening solution can be lost in the cleaning device, for example, the circulation. Such used dampening solution is in circulation preferably replaced.

With regard to the second components (second process fluid inlet, second process fluid outlet, second process fluid purification device, etc.) of the arrangement at the second printing unit, the statements made with respect to the first printing unit apply in this regard and in the following. The corresponding design of the arrangement on the first, on the second printing unit and / or on further printing units has the advantage of a decentralized cleaning of the process fluid. For this purpose, decentralized process fluid cleaning devices are provided, which are each assigned to a single printing unit. The process fluid purification devices preferably each have a cleaning performance which is substantially the same or greater than the contaminated process fluid flow of the respective printing unit. In this case, in a printing machine having a plurality of printing units, each printing unit is preferably assigned a process fluid cleaning device, and therefore the process fluid is cleaned in a decentralized manner.

Further, an embodiment of the arrangement, wherein the arrangement further comprises a first process fluid treatment device, wherein the first process fluid inlet is arranged between the first process fluid treatment device and the first printing unit, that the first process fluid flow, with which the first printing unit is supplied, the first process fluid treatment device is removable. Such a process fluid treatment device refers to a device in which the dampening solution, which is supplied to the dampening solution supply, is preferably checked for its quality and / or adjusted. This is preferably done continuously. The term quality preferably comprises a composition of the dampening solution (for example a water-alcohol ratio and / or other constituents) and / or the temperature and / or the residual stress with colored particles and / or the like. Furthermore, such a process fluid treatment device is preferably designed such that identified deficiencies in the process fluid treatment device can be eliminated. For example, an undesired water-alcohol ratio can be compensated by adding missing constituents (usually alcohol); a deviation from the desired temperature can be compensated by a Prozessfluidtemperierung be compensated, etc. Such a first process fluid treatment device is preferably equipped as a compact assembly, which can be set up externally on the first printing unit, for example in the form of a device cabinet and is connectable via fluid lines to the printing unit and / or the first process fluid cleaning device.

A further advantageous embodiment relates to an arrangement in which the arrangement further comprises a first process fluid recirculation line, wherein the first process fluid recirculation line is arranged between the first process fluid purification device and the first process fluid treatment device, such that the first process fluid effluent purified in the first process fluid purification device is introduced via the first process fluid recirculation line the first process fluid treatment device is conductive, and from there into the process fluid inlet is recirculated. Here is the arrangement with the first Process fluid recirculation line between the first process fluid cleaning device and the first process fluid treatment device preferably designed such that the purified first Prozeßfluidabstrom can be conducted without external power supply to the first process fluid treatment device. The arrangement therefore preferably has no delivery device, in particular no delivery pump, between the first process fluid purification device and the first process fluid treatment device.

Preferably, such an arrangement has a design, wherein the arrangement further comprises a first process fluid return line, which is arranged between the first printing unit and the first process fluid treatment device such that a first process fluid partial stream from the first printing unit directly to the first process fluid treatment device can be fed. This can e.g. be advantageous if a fountain solution circuit is provided over the e.g. a spray dampening unit is supplied with dampening solution. In the fountain solution fountain solution can advantageously circulate under pressure, so that preferably only the required dampening solution in the Sprühfeuchtwerk is removed from the fountain solution and the rest of the unneeded and therefore not contaminated fountain solution on the first process fluid return line is fed back into the preparation unit.

Furthermore, such an arrangement is preferred in which the first process fluid treatment device and the first process fluid purification device form a first combined process fluid purification and conditioning device housed in a first housing. Such a housing may preferably be executed closed around the functional components and / or have a plurality of housing elements. Such a first combined process fluid purification and treatment device is preferably configured as a compact assembly which can be set up externally on the first printing unit in the form of a device cabinet and can be connected to the printing unit via fluid lines (preferably the first process fluid inlet, the first process fluid outlet and / or the first process fluid return line) is. In this preferred embodiment, the first process fluid recirculation line is preferably arranged inside the equipment cabinet. Such an arrangement has, for example, the advantage that due to the spatial proximity between the first process fluid cleaning device and the first process fluid treatment device, a flow resistance in the first process fluid recirculation line can be kept particularly low so that a conveyor device, in particular a feed pump, can be easily avoided. For this purpose, for example, the first process fluid cleaning device can preferably be arranged spatially above the first process fluid processing device.

A further advantageous embodiment relates to such an arrangement in which the first process fluid treatment device and the first process fluid purification device have a common first control.

Furthermore, a design of an arrangement is preferred in which no process fluid buffer store is provided between the first printing unit and the first cleaning device for storing contaminated process fluid.

The term "between printing unit and cleaning device" in this sense refers to the distance along which the process fluid outflow flows between the area of the printing unit at which the process fluid outflow originates and the cleaning device in which the process fluid outflow is purified. In this case, this route also includes the interior of the cleaning device up to the last functional unit in which the last cleaning step is carried out.

The term process fluid buffer refers to a container into which the portion of the process fluid effluent that exceeds the cleaning performance of the purifier is conducted and stored. The process fluid to be cleaned, which would conventionally be stored during operation in such process fluid buffer stores, would be fed and cleaned during operation breaks from the process fluid buffer storage to the process fluid purification device. A process fluid buffer in the sense used here would therefore be at least have a volume that is equal to or greater than the product of time multiplied by the volume flow difference of process fluid effluent and cleaning performance of the connected cleaning device. A process fluid buffer storage in the sense used here is therefore a container in which the process fluid to be cleaned is intermediately stored until the cleaning device has the capacity to clean the intermediate process fluid during breaks in operation of the printing press.

As a process fluid buffer storage in the sense therefore not catchment troughs are considered in the dampening unit, in which the wetting of the rollers excess dampening solution is collected during operation. Further, not to be considered as a process fluid buffer, separation vessels, settling tanks or similar smaller vessels, which in use, e.g. be used in process fluid purification devices. In such containers, e.g. In the course of a dampening solution pre-cleaning dampening solution contamination is separated from the dampening solution. Such fountain solution impurities are e.g. Paper coating, dust, paint particles or the like. These are in such containers of dampening solution by settling and discharge by Skimmer or the like. separated from dampening solution. Such containers, which are not considered to be process fluid buffer reservoirs, preferably have a reservoir volume smaller than the process fluid volume caused by the contaminated process fluid effluent resulting from a process fluid effluent to be cleaned during operation of the printing press at the first printing unit in a 4 hour period.

Such a preferred arrangement, in which between the printing unit and cleaning device no process fluid buffer memory is provided, has various advantages. For example, in such an arrangement, the laying of fluid lines, which can be complex, in particular in the case of process fluid buffer memories which are fed by a plurality of printing units, is eliminated. Furthermore, conventional buffer stores are often located at a low height level, so that pumps can be saved, which would bring the process fluid from such process fluid storage tanks to the level of the process fluid purification device. Finally, contamination of bio-organisms in the fountain solution during extended storage times of the process fluid in such process fluid storage tanks is avoided.

Furthermore, such an arrangement preferably has a design in which no process fluid buffer for storing purified process fluid is provided between the first cleaning device and the first printing unit.

The term "between cleaning device and printing unit" in this sense refers to the path along which the process fluid outflow is directed to the printing unit. In this case, this distance begins at the point at which the process fluid cleaning device completely purified process fluid is removed, ie in the flow direction directly behind the last functional unit of the process fluid cleaning device in which the last cleaning step is performed.

The term process fluid reservoir refers to a vessel into which the portion of the purified process fluid effluent that was initially stored in the process fluid buffer and was piped from the process fluid buffer to the process fluid purification device and purged is stored and stored. A process fluid buffer in the sense used here therefore preferably has the same volume as the process fluid buffer memory already described. Accordingly, a process fluid buffer is a container in which the process fluid cleaned in the course of breaks in the printing press is intermediately stored. As a process fluid buffer in the sense, therefore, containers are not considered in process fluid treatment equipment in which the process fluid is prepared for use in ongoing operation. Prepared means tempered to the isopropanol content, pH, hardness value, and / or the like controlled and / or adjusted.

Such a preferred arrangement, in which between the cleaning device and printing unit no process fluid buffer is provided, has various advantages. For example, deleted in such an arrangement, the laying of fluid lines, which can be expensive, especially in process fluid buffers that feed multiple printing units. Furthermore, conventional latches are often located at a low height level, so that pumps can be saved, which would bring the process fluid from such process fluid storage tanks to the level of the process fluid treatment device. Finally, contamination of bio-organisms in the dampening solution during prolonged storage times of the process fluid in such process fluid buffers is avoided.

Also preferred is an embodiment of the arrangement in which there is no line connection between the described, the first printing unit arranged first components and components on other printing units of the printing press in normal operation, which allows an exchange of process fluid with components of an array on another printing unit. The first process fluid cleaning device or the other first components (process fluid processing device, etc.) are therefore preferably used exclusively for the first printing unit. This allows e.g. adjust the composition of the process fluid, in particular a dampening solution (that is, for example, additives in the dampening solution and / or the alcohol content of the dampening solution) individually to the needs of the first printing unit.

Further, an embodiment of the arrangement, wherein the arrangement further comprises a second process fluid treatment device, wherein the second process fluid inlet is arranged between the second process fluid treatment device and the second printing unit, that the second process fluid flow, with which the second printing unit is supplied, the second process fluid treatment device is removable.

A further advantageous embodiment relates to an arrangement in which the assembly further comprises a second process fluid recirculation line, wherein the second process fluid recirculation line is disposed between the second process fluid purification device and the second process fluid treatment device such that the second process fluid effluent purified in the second process fluid purifier is conductive into the second process fluid treatment device via the second process fluid recirculation line and from there to the second process fluid recirculation line Process fluid inlet is recirculated. In this case, the arrangement with the second process fluid recirculation line between the second process fluid purification device and the second process fluid treatment device is preferably configured such that the purified second process fluid effluent can be conducted into the second process fluid treatment device without external energy supply. The arrangement therefore preferably has no delivery device, in particular no delivery pump, between the second process fluid purification device and the second process fluid treatment device

Preferably, such an arrangement has a design in which the arrangement further comprises a second process fluid return line which is arranged between the second printing unit and the second process fluid treatment device such that a second process fluid partial stream from the second printing unit can be fed directly to the second process fluid treatment device.

Furthermore, such an arrangement is preferred in which the second process fluid treatment device and the second process fluid purification device form a second combined process fluid purification and treatment device housed in a second housing. Such an arrangement has, for example, the advantage that due to the spatial proximity between the second process fluid cleaning device and the second process fluid treatment device, a flow resistance in the second process fluid recirculation line can be kept particularly low so that a conveyor device, in particular a feed pump, can be easily avoided. For this purpose, for example, the second process fluid purification device can preferably be arranged spatially above the second process fluid treatment device.

A further advantageous embodiment relates to such an arrangement in which the second process fluid treatment device and the second process fluid purification device have a common second control.

Furthermore, a design of an arrangement is preferred in which no process fluid buffer store is provided between the second printing unit and the second cleaning device for storing contaminated process fluid.

Furthermore, such an arrangement preferably has a design in which no process fluid buffer for storing purified process fluid is provided between the second cleaning device and the second printing unit.

Also preferred is an embodiment of the arrangement in which the arrangement according to one of the arrangements described above is also designed with regard to further, preferably all printing units of the printing press.

The arrangements described above have the advantage that process fluid can be processed quickly, reducing the risk of contamination by microbial contamination. Furthermore, a decentralized arrangement of the devices is made possible, whereby storage or buffer tanks, a piping and / or corresponding pumps can be saved. As a result, the total amount of process fluid to be provided on the printing press can be significantly reduced. Another advantage is that the separate execution per printing unit depending on the printing unit different process fluid compositions and / or cleaning devices can be used, which can be optimally adapted to the needs of each printing unit. Therefore, an arrangement is particularly preferred in which a described process fluid cleaning and conditioning device is provided separately for each printing unit.

A further advantageous embodiment relates to such an arrangement in which the arrangement is part of a dampening solution supply for a dampening unit of a printing unit of a printing press, wherein the process fluid is a dampening solution and wherein the described process fluid-carrying parts are moistening parts. In principle, a described arrangement can be used for various process fluids used on printing machines, such as e.g. also for washing liquids, hydraulic oils or the like. However, the arrangement is particularly well suited, as claimed in relation to this embodiment, for use for dampening solution supply. Accordingly, in the case of an arrangement for dampening solution supply, a process fluid purification device would be a dampening solution treatment device, a process fluid inlet a dampening solution inlet, a process fluid outlet a fountain solution outlet, a process fluid recirculation line a fountain solution recirculation line, a process fluid return line a dampening solution return line, a process fluid inflow, a fountain solution inflow, a process fluid outflow a dampening effluent, a process fluid substream a dampening solution partial flow and a combined process fluid cleaning and treatment device a combined dampening solution cleaning and treatment device.

A second aspect of the invention relates to a printing machine having an arrangement as described above.

A third aspect relates to a method comprising the steps
Determining a first process fluid effluent from contaminated process fluid to be cleaned, which is produced at a first printing unit of a printing press during operation per unit time,
Determining a second process fluid effluent from contaminated process fluid to be cleaned, which accumulates at a second printing unit on the printing machine during operation per unit time,
Providing an arrangement with a first process fluid cleaning device at the first printing unit of the printing press, wherein the provided first process fluid cleaning device is provided with a cleaning performance, which is equal to or greater than the first process fluid effluent,
Providing an arrangement with a second process fluid purification device at the second printing unit of the printing press, wherein the provided second process fluid purification device is provided with a cleaning performance that is equal to or greater than the second process fluid outflow,
wherein the provision of the arrangement with the first process fluid cleaning device takes place in such a way that during operation of the printing machine the entire process fluid arising at the printing unit is controllably supplied to the process fluid circuit by the first process fluid purification device and in the cleaned state;
wherein the provision of the arrangement with the second process fluid cleaning device takes place in such a way that during operation of the printing press the entire process fluid accumulating on the second printing unit is controllably supplied to the second process fluid circuit by the second process fluid purification device and, in the cleaned state, re-supplied to the second process fluid circuit.

Here, the step of determining a process fluid effluent preferably refers to the design phase of the printing press in connection with the volumetric flow design of the process fluid purification device, i. It is a process fluid outflow determined that is expected to occur on a printing unit during operation or usually already incurred. This can also be done on the fly. According to such a determined value, a process fluid purification device is designed and provided. In other preferred embodiments of the method, the step of determining a process fluid effluent may also be on the fly, e.g. by appropriately provided sensors or the like, and any excess process fluid stream may be supplied to other process fluid purification apparatus (s), e.g. can be arranged on other printing units.

A fourth aspect of the invention relates to a combined process fluid purification and treatment apparatus comprising a process fluid purification apparatus Process fluid treatment apparatus and a housing, wherein the process fluid purification device and the process fluid treatment device are housed in the housing. Such a combined process fluid purification and treatment device has the advantage that preferably several such combined devices can be provided decentrally on a printing press. In this case, we associate such a combined process fluid purification and treatment device preferably at least one printing unit and more preferably exactly one printing unit. Such a combined process fluid purification and treatment device may have additional buffer tanks, eg if the cleaning performance of the integrated process fluid purification device is lower than the expected process fluid effluent to be cleaned.

Preferably, such a combined process fluid purification and processing apparatus is configured as described above in relation to the first aspect of the invention.

Further preferred modifications of this method will become apparent from the described preferred embodiments of one of the above arrangements and their application.

In the following, individual particularly preferred embodiments of the invention will be described by way of example. Some of the described embodiments have features that are not necessarily required to practice the present invention, but are generally considered preferred. Thus, embodiments are also to be regarded as falling within the teaching of the invention, which does not have all the features of the embodiments described below. Similarly, it is conceivable to selectively combine features described with respect to different embodiments.

Brief description of the drawings

Figur 1

eine herkömmliche Anordnung zur Reinigung und Aufbereitung von Feuchtmittel im Stand der Technik,

Figur 2a

eine schematische Ansicht eines Druckwerks einer Druckmaschine mit einer bevorzugten Ausführungsform einer erfindungsgemäßen Anordnung und

Figur 2b

eine schematische Ansicht einer Druckmaschine mit mehreren Druckwerken mit einer bevorzugten Ausführungsform einer erfindungsgemäßen Anordnung.

In the figures shows:

FIG. 1

a conventional arrangement for cleaning and processing dampening solution in the prior art,

FIG. 2a

a schematic view of a printing unit of a printing machine with a preferred embodiment of an inventive arrangement and

FIG. 2b

a schematic view of a printing machine with multiple printing units with a preferred embodiment of an inventive arrangement.

Detailed description of the drawing

• FIG. 1 shows a conventional arrangement for cleaning and processing dampening solution in the prior art. With respect to the arrangement in the prior art, reference may be made to the statements made in the introduction to the description.
• FIG. 2a shows a schematic view of a printing unit of a printing press with a preferred embodiment of an inventive arrangement, and FIG. 2b shows a schematic view of a printing machine with multiple printing units with a preferred embodiment of an inventive arrangement.

It puts FIG. 2a essentially an enlarged section FIG. 2b so to avoid repetition only the differences are highlighted and below the similarities are described only once.

FIG. 2b shows a first printing unit 10, a second printing unit 20 and other printing units of a printing machine. 1

In this case, the illustrated printing machine 1 has an arrangement for supplying the individual printing units with process fluid, which is embodied in the illustrated preferred embodiment as dampening solution supply.

In this case, the preferred arrangement on the first printing unit 10 comprises a first process fluid treatment device 12 and a first process fluid purification device 11. The first process fluid purification device 11 is connected to the first printing unit 10 via a first process fluid inlet 13. Feuchtmittel is pumped from a tank in the first process fluid processing unit 12 by means of a pump to a dampening unit in the first printing unit. In the illustrated preferred embodiment, the dampening unit is connected to the process fluid treatment device 12 via a pressure line designed as a partial circuit. It means that a first process fluid inlet SZ1 is pumped via the pump to the dampening unit. In the dampening unit, a portion of the dampening solution required for printing is taken, for example, via a spraying device provided in the dampening unit, and the remainder of the dampening solution is returned to the first process fluid processing unit 12 in the form of a first process fluid substream ST1 via a first process fluid return line 16. Also conceivable is an arrangement in which the first process fluid return line 16 is not provided, so that the entire amount of fluid pumped to the dampening unit and not consumed in the printing process is subsequently supplied to the first process fluid cleaning device 11.

The portion of the dampening solution required for printing, which is applied to corresponding printing rollers in the printing unit, is consumed to some extent in the printing process, that is, it is transferred from the corresponding rollers to the printing material and / or evaporated, another part drips from the rollers of the Dampening and / or the pressure rollers from and is collected in the first printing unit 10. For this purpose, in the first printing unit 10, catching devices not shown in detail, e.g. a drip tray or the like provided. The portion of the moistening agent portion which is not consumed and which is required for printing has generally come into contact, in the printing unit, with elements of the printing machine 1 and / or with dust in the air which causes contamination of the dampening solution, e.g. caused by paper dust and / or paint residues. This part of the fountain solution must therefore be cleaned and is fed as the first process fluid effluent SA1 via the first process fluid outlet 14 of the process fluid purification device 11. In this case, the process fluid drain 14 is preferably carried out by a line or the like, which is e.g. extends between a sump and the first process fluid cleaning device 11.

Here, the first process fluid purification device 11 according to the invention is designed such that it has a cleaning performance that is substantially equal to or greater than the first process fluid outflow SA1. That is, the first process fluid effluent SA1 can during operation of the printing press by the first process fluid cleaning device 11 are cleaned without being cached. Here, the interior of the first process fluid cleaning device 11 is shown only schematically. Shown is, for example, a smaller setting container, in which heavier components can settle in the dampening solution, or ascend in the lighter impurities to the surface of the process fluid and can be removed there, for example via a skimmer. Furthermore, it is shown schematically that from this setting container, a fluid flow can be pumped via a pump in a cross-flow filter. A purified portion is recirculated via a first process fluid recirculation line 15 into the first process fluid treatment device 12, that is, pumped back to be there from the fluid supply of the first printing unit 10 again. Another portion of the dampening solution, which is pumped from the settling tank into the crossflow filter, flows back into the settling tank so that an internal circuit is present in the first process fluid purifying device 11. Furthermore, it is conceivable that in the first process fluid cleaning device 11 further functional assemblies are provided, which serve to clean the dampening solution. For this example, separators, filter units or the like come into question.

In the first process fluid treatment device 12, the dampening solution is preferably heated in a tank to a corresponding temperature. Furthermore, the dampening solution in the process fluid treatment device 12 is preferably checked for its composition and, if necessary, compensated for this.

In principle, it is conceivable within the scope of the invention that the first process fluid cleaning device 11 is designed such that the process fluid effluents from several printing units of the printing press 1 can be cleaned in real time, so to speak "online", in this one process fluid cleaning device.

However, the arrangement of the printing press preferably comprises one process fluid cleaning device per printing unit, so that each one Process fluid effluent, which is obtained in one of the printing units, in the respective process fluid cleaning device, which is associated with the respective printing unit, can be cleaned during operation and is cleaned. Furthermore, it is preferable to combine such a process fluid purification device with the downstream process fluid treatment device in such a way that a compact, combined process fluid purification and conditioning device is provided, which is preferably accommodated in a separate housing 18, which in FIG FIG. 2a is shown only schematically.

In FIG. 2a a printing machine 1 is shown, which has a plurality of printing units. Only the first two printing units 10, 20 and their components are provided with reference numerals. The other two illustrated printing units preferably correspond substantially to the first and the second printing unit 10, 20, respectively.

Also, the second printing unit 20 and arranged thereon second components of the arrangement correspond in the illustrated preferred embodiment, the first printing unit 10 and the first components arranged thereon. With respect to the description of these second components, reference is therefore made to the above description of the first components.

In this case, in a preferred embodiment, in each case one combined process fluid cleaning and conditioning device can be provided on each of the illustrated printing units, even if in FIG. 2b this in FIG. 2a schematically illustrated housing 18 is not shown.

As in FIG. 2b is shown, no fluid lines are preferably provided between the arrangements on the respective printing units, so that each of the arrangements represents a self-contained arrangement on one of the printing units. It is also conceivable that in order to create a redundancy lines between the individual arrangements are provided, so that fluid flows, which, for example, due to a defect in one of the process fluid cleaning devices can not be cleaned in other process fluid purification devices can be processed.

LIST OF REFERENCE NUMBERS

D

printing unit

A

processing plant

R

purifier

S

settling tank

Q

Cross-flow filtration unit

P

Process fluid buffer

Z

Process fluid buffer

L

line connection

1

press

10

first printing unit

11

first process fluid purification device

12

first process fluid treatment device

13

first process fluid feed

14

first process fluid drain

15

first process fluid recirculation line

16

first process fluid return line

17

first combined process fluid purification and treatment unit

18

first housing

SZ1

first process fluid influx

SA1

first process fluid effluent

ST1

first process fluid partial stream

20

second printing unit

21

second process fluid purification device

22

second process fluid treatment device

23

second process fluid feed

24

second process fluid drain

25

second process fluid recirculation line

26

second process fluid return line

Claims (11)

1. Arrangement at a printing machine (1),
   the arrangement comprising a first process fluid inlet (13), a first process fluid outlet (14) and a first process fluid cleaning device (11), being assigned to a first printing device (10) of the printing machine (1),
   the first process inlet (13) being designed in a manner that during the operation of the printing machine (1) the first printing device (10) can be supplied with a first process fluid inflow (SZ1) via the first process fluid inlet (13), wherein the first process fluid outlet (14) is designed in a manner that the entirety of the process fluid to be cleaned which accumulates at the first printing device (10) during operation of the printing machine (1) can be supplied to the first process fluid cleaning device (11) in the form of a process fluid outflow (SA1) via the first process fluid outlet (14),
   the first process fluid cleaning device (11) comprising a cleaning performance that is equal to or exceeds the first process fluid outflow (SA1) and
   the first process fluid cleaning device (11) and the first process fluid inlet (13) communicating in a way that the first process fluid outflow (SA1) having been cleaned in the first process cleaning device (11) can be recirculated into the first process fluid inlet (13),
   the arrangement comprising a second process fluid inlet (23), a second process fluid outlet (24) and a second process fluid cleaning device (21) being assigned to a second printing device (20) of the printing machine (1),
   the second process inlet (23) being designed in a manner that during the operation of the printing machine (1) the second printing device (20) can be supplied with a second process fluid inflow via the second process fluid inlet (23),
   the second process fluid outlet (24) being designed in a manner that the entirety of the process fluid to be cleaned which accumulates at the second printing device (20) during operation of the printing machine (1) can be supplied to the second process fluid cleaning device (21) in the form of a process fluid outflow via the second process fluid outlet (24),
   the second process fluid cleaning device (21) comprising a cleaning performance that is equal to or exceeds the second process fluid outflow and
   the second process fluid cleaning device (21) and the second process fluid inlet (23) communicating in a manner that the second process fluid outflow having been cleaned in the second process cleaning device (21) can be recirculated into the second process fluid inlet (23).
2. Arrangement according to claim 1,
   the arrangement further comprising a first process fluid treatment device (12), wherein the first process fluid inlet (13) is arranged between the first process fluid treatment device (12) and the first printing device (10) in a manner that the first process fluid inflow (SZ1), which the first printing device (10) can be supplied with, can be extracted from the first process fluid treatment device (12).
3. Arrangement according to claim 2,
   the arrangement further comprising a first process recirculation pipe (15),
   the first process fluid recirculation pipe (15) being arranged between the first process fluid cleaning device (11) and the first process fluid treatment device in a manner that the first process fluid outflow (SA1) having been cleaned in the first process fluid cleaning device (11) can be guided into the first process fluid treatment device (12) via the first process fluid recirculation pipe (15) and can be recirculated therefrom to the process fluid inflow (13).
4. Arrangement according to any of claims 2 or 3,
   the arrangement further comprising a process fluid return pipe (16) that is arranged between the first printing device (10) and the first process fluid treatment device (12) in a manner that a first partial process fluid flow (ST1) from the first printing device (10) can be directly fed into the first process fluid treatment device (12) and/or
   the first process fluid treatment device (12) and the first process fluid cleaning device (11) forming a first combined process fluid cleaning and processing device (17) accommodated in a first casing (18) and/or
   the first process fluid treatment device (12) and the first process fluid cleaning device (11) comprising a common first controller.
5. Arrangement according to any of the preceding claims, wherein, during normal operation, there is no pipe connection (L) between the described first components being arranged at the first printing device (10) and the components being arranged at other printing devices of the printing machine (1), which enables the exchange of process fluid with components of an arrangement at another printing device.
6. Arrangement according to any of the preceding claims,
   the arrangement further comprising a second process fluid treatment device (22), wherein the second process fluid inlet (23) is arranged between the second process fluid treatment device (22) and the second printing device (20) in a manner that the second process fluid inflow, which the first printing device (20) can be supplied with, can be extracted from the second process fluid treatment device (22).
7. Arrangement according to claim 6,
   the arrangement further comprising a second process fluid recirculation pipe (25),
   the second process recirculation pipe (25) being arranged between the second process fluid cleaning device (21) and the second process fluid treatment device (22) in a manner that the second process fluid outflow having been cleaned in the second process fluid cleaning device (21) can be guided into the second process fluid treatment device (22) via the second process fluid recirculation pipe (25) and can be recirculated therefrom to the second process fluid inflow (23) and/or
   the arrangement further comprising a second process fluid return pipe (26) that is arranged between the second printing device (20) and the second process fluid treatment device (22) in a manner that a second partial process fluid flow can be fed directly from the second printing device (20) into the second process fluid treatment device (22).
8. Arrangement according to claim 7,
   the second process fluid treatment device (22) and the second process fluid cleaning device forming a second combined process fluid cleaning and processing device accommodated in a second casing.
9. Arrangement according to any of claims 6 to 8,
   the second process fluid treatment device (22) and the second process fluid cleaning device (21) comprising a common second controller.
10. Arrangement according to any of the preceding claims, the arrangement being a component part of a dampening solution provision of a dampening device of a printing device (10, 20) of a printing machine (1), the process fluid being a dampening solution and the described process fluid bearing parts being dampening solution bearing parts.
11. Method comprising the steps of:

    identifying a first process fluid outflow (SA1) of polluted process fluid to be cleaned that accumulates at a first printing device (10) of a printing machine (1) during operation per unit time,

    identifying a second process fluid outflow of polluted process fluid to be cleaned that accumulates at a second printing device (20) of the printing machine (1) during operation per unit time,

    providing an arrangement with a first process cleaning device (11) at the first printing device (10) of the printing machine (1), the provided first process fluid cleaning device (11) being provided with a cleaning performance that is equal to or exceeds the first process fluid outflow (SA1),

    providing an arrangement with a second process cleaning device (21) at the second printing device (20) of the printing machine (1), the provided second process fluid cleaning device (21) being provided with a cleaning performance that is equal to or exceeds the second process fluid outflow,

    wherein the provision of the arrangement with the first process fluid cleaning device (11) is done in a manner that during the operation of the printing machine (1) the entirety of the process fluid accumulated for cleaning at the first printing device (10) can be guided through the first process fluid cleaning device (11) and can be again fed into the first process fluid circuit in a cleaned condition,

    wherein the provision of the arrangement with the second process fluid cleaning device (21) is done in a manner that during the operation of the printing machine (1) the entirety of the process fluid accumulated for cleaning at the second printing device (20) can be guided through the second process fluid cleaning device (21) and can again be fed into the second process fluid circuit in a cleaned condition.

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