EP0826502A1 - Method and means for realising a fresh cleaning solution and for treating the used solution - Google Patents

Method and means for realising a fresh cleaning solution and for treating the used solution Download PDF

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Publication number
EP0826502A1
EP0826502A1 EP97810589A EP97810589A EP0826502A1 EP 0826502 A1 EP0826502 A1 EP 0826502A1 EP 97810589 A EP97810589 A EP 97810589A EP 97810589 A EP97810589 A EP 97810589A EP 0826502 A1 EP0826502 A1 EP 0826502A1
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EP
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Prior art keywords
solution
tank
wiping
fresh
ultrafiltration
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EP97810589A
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German (de)
French (fr)
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EP0826502B1 (en
Inventor
Fausto Giori
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KBA Notasys SA
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De la Rue Giori SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/30—Recovering used solvents or residues
    • B41P2235/32—Recovering used solvents or residues by distilling

Definitions

  • the present invention relates to a production method fresh wiping solution, containing at least 90% of water and additives, and treating this wiping solution used by the inks of one or multiple intaglio printing machines operating in closed circuit and a device for the implementation of this process.
  • the printing plates mounted on the plate cylinder in which the designs are engraved, are wiped by the friction of a wiping cylinder turning in the same direction as the plate cylinder and which removes the ink outside the sizes of the plate.
  • a wiping cylinder turning in the same direction as the plate cylinder and which removes the ink outside the sizes of the plate.
  • the part bottom of it is in a tank wiping, this tank being further equipped with brushes and squeegees.
  • a system of nozzles spurts from the fresh wiping solution on the wiping cylinder and the fresh solution when mixed with the ink goes exit the wiping tank as used solution.
  • US patent 5,390,598 describes a such as permanent cylinder cleaning system wiping in an intaglio printing machine.
  • wiping solutions is described in patent DE 1,546,776 and consists of an aqueous solution containing 1 to 5% by weight of alkaline detergent, 2 to 10% by weight of a commercial cleaning product. containing alkaline phosphate and 1 to 10% by weight of a wetting agent. More particularly, this aqueous solution contains 1.5 to 2.5% by weight of caustic soda NaOH, 2 to 5% by weight of sodium phosphate Na 3 (PO 4 ) and 1 to 3% by weight of castor oil sulfonated.
  • the recycling capacity of this process after ultrafiltration is around 80%, this value additionally dependent on the quality of the ink used and of its concentration in the wiping solution.
  • the object of the present invention is to provide a closed circuit process, in particular in which most of the water and flocculation products in circuit is recovered from the used wiping solution, reused to produce the fresh wiping solution and no longer rejected at taste. Consumption of water and flocculation of the process can thus be strongly decreased and we will only get waste solids which can then be treated with respect environmental protection standards.
  • the invention also makes it possible to no longer use coal active that corrected the chemical oxygen demand.
  • Such a method of producing wiping solution fresh and used wiping solution treatment is defined by the steps of claims 1 and 2.
  • Independent claim 9 defines a device for implementing the method according to the invention.
  • Claims 10 to 18 define modes of particular realization of the setting device process work.
  • Figure 1 is the block diagram of a method of wiping solution treatment known in the state of the technique.
  • FIG. 2 is the block diagram of a method of production and recycling of the wiping solution according to the invention.
  • Figure 3 is the block diagram of a setting device implementing the method according to the invention.
  • the wiping solution may optionally contain more detergent.
  • the wiping solution fresh is produced by mixing water, caustic soda and sulfonated castor oil.
  • the fresh solution is introduced into one or more wiping tanks in step (b) of the process and contaminated with the inks.
  • the used wiping solution is then transferred from the wiping tank (s) to the ultrafiltration installation to undergo step (c) of the process, namely ultrafiltration.
  • This step (c) produces on the one hand a clear solution which is without further recycled as a fresh wiping solution in step (d), and on the other hand a concentrated residual solution containing ink.
  • This ultrafiltration step makes it possible to recover approximately 80% of the solution.
  • the concentrated residual solution then undergoes step (e) of the process which is flocculation. This flocculation occurs by adding calcium chloride CaCl 2 and ferric chloride FeCl 3 .
  • step (f) of the process The result of the flocculation is then filtered in step (f) of the process, and solid residues and a filtered solution are thus obtained.
  • this filtered solution is neutralized by adding hydrochloric acid HCL.
  • the neutralized solution undergoes in stage (h) an evaporation which gives on the one hand distilled water, and on the other a concentrated saline solution.
  • the distilled water is collected in order to use it to produce fresh wiping solution in step (i) of the process, while the concentrated salt solution is filtered in step (j) and this filtration gives d on one side of the solid salts and on the other a solution highly concentrated in salt which is reused to carry out the flocculation of step (e) of the process.
  • Distilled water is sent to a tank where it is mixed with softened water taken from the city network. This mixture is finally used to produce fresh wiping solution by adding sulphonated castor oil and caustic soda NaOH, in the proportions indicated above for example
  • Figure 3 shows an example of a device for implementation of the process which is the subject of the invention.
  • This device comprises a tank 1 into which the spent solution passes and is transferred into a first ultrafiltration tank 2, from which it then passes into a first ultrafiltration unit 3.
  • the clear solution from this first ultrafiltration unit 3 is brought into a tank of fresh solution 21 from where it is reused as a fresh wiping solution, while the concentrated residual solution from this first ultrafiltration unit 3 is sent to a second ultrafiltration tank 4 and there in a second ultrafiltration unit 5.
  • the clear solution from this second ultrafiltration unit 5 is in turn sent to the fresh solution tank 21 to be reused as a fresh wiping solution, while the concentrated residual solution is brought into a concentrated solution tank 6.
  • This concentrated residual solution then passes into the flocculation 7 where the flocculation step is carried out.
  • Means for adding the calcium chloride CaCl 2 and the ferric chloride FeCl 3 necessary for flocculation are mounted on the flocculation tank 7. These means comprise at least one reservoir and a metering pump for each compound added.
  • the flocculated solution is then brought into a filter press 8 separating the solid residues from the solution.
  • the filtered residual solution is stored in a filtered solution tank 9.
  • This solution is then brought into a neutralization tank 10 where it is neutralized by the addition of hydrochloric acid HCL and recovered in a neutralized solution tank 11.
  • means for adding hydrochloric acid are mounted on the neutralization tank 10. These means comprise at least one tank and a metering pump.
  • the solution is sent to a first evaporation unit 12.
  • the water vapor obtained from this first evaporation unit 12 is recovered in a tank of distilled water 17, while the solution salt passes into a salt solution tank 13 then into a second evaporation unit 14.
  • the water vapor obtained from this second evaporation unit 14 is also recovered in the distilled water tank while the salt solution and concentrate passes into a tank 15 and then into a filtration system 16 from which one side extracts solid salts and the other a solution which is recycled by suitable means, such as for example a pump, in the flocculation tank 7
  • suitable means such as for example a pump
  • the water is sent to a water tank 19, which also receives city water once it has passed through a water softener 18, and the water softened and the distilled water are sent to the wiping solution mixture tank 20 where the fresh solution is prepared by adding sulphonated castor oil and caustic soda. This is finally transported in the fresh solution tank 21 and again passes through the wiping tank or tanks of the printing machines after use.
  • the modes of execution described are given for example and variations as part of the claimed protection are possible.
  • the proportion of the components of the wiping solution may be slightly varied.
  • the acid used to perform neutralization can be acid sulfuric.

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  • Separation Using Semi-Permeable Membranes (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Detergent Compositions (AREA)

Abstract

The method for making a fresh cleaning fluid for a copper-plate printing machine. It involves using softened water, sulphonated ricin oil and caustic soda in proportions of 98.5 per cent, 1 per cent and 0.5 per cent respectively. After the fluid has been used it is subjected to ultrafiltration, producing a clear solution and a concentrated solution. The clear solution is recycled and the concentrated solution is flocculated to give solid residues and a filtered solution, the latter being neutralised, evaporated and distilled. The distilled water is used to make fresh solution, and the contaminated concentrated solution is used to make dry solid salts and a filtrate used for flocculation. The flocculant is made with the addition of calcium chloride and ferrous chloride, and the neutralisation is performed by hydrochloric acid with or without sulphuric acid.

Description

La présente invention concerne un procédé de production de solution d'essuyage fraíche, contenant au moins 90% d'eau et des additifs, et de traitement de cette solution d'essuyage usée par les encres d'une ou plusieurs machines d'impression taille-douce fonctionnant en circuit fermé et un dispositif pour la mise en oeuvre de ce procédé.The present invention relates to a production method fresh wiping solution, containing at least 90% of water and additives, and treating this wiping solution used by the inks of one or multiple intaglio printing machines operating in closed circuit and a device for the implementation of this process.

Dans les machines d'impression taille-douce, les plaques d'impression montées sur le cylindre porte-plaque, dans lesquelles les dessins sont engravés, sont essuyées par le frottement d'un cylindre d'essuyage tournant dans le même sens que le cylindre porte-plaque et qui enlève l'encre se trouvant en dehors des tailles de la plaque. Pour effectuer le nettoyage de l'encre se trouvant sur le cylindre d'essuyage, la partie inférieure de celui-ci se trouve dans une cuve d'essuyage, cette cuve étant en outre équipée de brosses et de râcles. Un système de buses gicle de la solution d'essuyage fraíche sur le cylindre d'essuyage et la solution fraíche une fois mélangée à l'encre va sortir de la cuve d'essuyage comme solution usée.In intaglio printing machines, the printing plates mounted on the plate cylinder, in which the designs are engraved, are wiped by the friction of a wiping cylinder turning in the same direction as the plate cylinder and which removes the ink outside the sizes of the plate. To clean the ink, on the wiping cylinder, the part bottom of it is in a tank wiping, this tank being further equipped with brushes and squeegees. A system of nozzles spurts from the fresh wiping solution on the wiping cylinder and the fresh solution when mixed with the ink goes exit the wiping tank as used solution.

A titre d'exemple, le brevet US 5,390,598 décrit une telle installation de nettoyage permanent du cylindre d'essuyage dans une machine d'impression taille-douce.For example, US patent 5,390,598 describes a such as permanent cylinder cleaning system wiping in an intaglio printing machine.

Actuellement, de nouvelles encres ont été développées, et celles-ci permettent de mettre en oeuvre un procédé d'essuyage utilisant une solution à base d'eau qui est beaucoup moins nocive pour l'environnement. Ces nouvelles encres utilisées dans le processus d'impression taille-douce sont connues, par exemple des brevets US 4,966,628 et EP 0 340 163. De telles encres comprennent entre autres des composants oléorésineux et des pigments. Des solutions d'essuyage à base d'eau utilisées dans de telles machines d'impression taille-douce avec ces nouvelles encres sont également connues dans l'état de la technique et ces solutions d'essuyage contiennent, en général, au moins 90% d'eau et des additifs.Currently, new inks have been developed, and these make it possible to implement a process wiping using a water-based solution which is much less harmful to the environment. These new inks used in the process intaglio printing machines are known, for example US patents 4,966,628 and EP 0 340 163. Such inks include oleoresin components and pigments. Water-based wiping solutions used in such intaglio printing machines with these new inks are also known in the state of the art and these wiping solutions generally contain at least 90% water and additives.

L'une de ces solutions d'essuyage est décrite dans le brevet DE 1 546 776 et se compose d'une solution aqueuse contenant 1 à 5% en poids de lessive alcaline, 2 à 10% en poids d'un produit de nettoyage commercial contenant du phosphate alcalin et 1 à 10% en poids d'un agent mouillant. Plus particulièrement, cette solution aqueuse contient 1,5 à 2,5% en poids de soude caustique NaOH, 2 à 5% en poids de phosphate de sodium Na3(PO4) et 1 à 3% en poids d'huile de ricin sulfonée.One of these wiping solutions is described in patent DE 1,546,776 and consists of an aqueous solution containing 1 to 5% by weight of alkaline detergent, 2 to 10% by weight of a commercial cleaning product. containing alkaline phosphate and 1 to 10% by weight of a wetting agent. More particularly, this aqueous solution contains 1.5 to 2.5% by weight of caustic soda NaOH, 2 to 5% by weight of sodium phosphate Na 3 (PO 4 ) and 1 to 3% by weight of castor oil sulfonated.

Une autre de ces solutions d'essuyage est décrite dans le brevet US 3,389,656 et se compose d'une solution aqueuse contenant environ 1 à 5% en poids d'une base forte, comme par exemple l'hydroxyde de potassium ou l'hydroxyde de sodium ou encore l'hydroxyde d'ammonium, environ 2 à 10% en poids d'un détergent, par exemple du polyphosphate de sodium, et environ 0,3 à 10% en poids d'un agent mouillant tel que de l'huile de ricin sulfonée.Another of these wiping solutions is described in US Patent 3,389,656 and consists of a solution aqueous containing about 1 to 5% by weight of a base strong, such as potassium hydroxide or sodium hydroxide or ammonium hydroxide, about 2 to 10% by weight of a detergent, for example sodium polyphosphate, and about 0.3 to 10% by weight a wetting agent such as castor oil sulfonated.

Un procédé de production de solution d'essuyage fraíche et de traitement de solution d'essuyage usée connu dans l'état de la technique comporte les étapes suivantes:

  • (a) production de solution d'essuyage fraíche,
  • (b) introduction de la solution d'essuyage fraíche dans une ou plusieurs cuves d'essuyage et contamination par les encres,
  • (c) ultrafiltration de la solution usée venant de la ou des cuves d'essuyage, produisant une solution claire et une solution résiduelle concentrée,
  • (d) recyclage de la solution claire dans le circuit de solution d'essuyage fraíche,
  • (e) floculation de la solution résiduelle concentrée issue de l'ultrafiltration,
  • (f) filtration de la solution floculée donnant des résidus solides et une solution,
  • (g) neutralisation de la solution filtrée avec de l'acide,
  • (h) réduction de la demande chimique d'oxygène de la solution neutralisée, et
  • (i) rejet à l'égout de la solution réduite.
    • A process for producing fresh wiping solution and for treating used wiping solution known in the prior art comprises the following steps:
  • (a) production of fresh wiping solution,
  • (b) introduction of the fresh wiping solution into one or more wiping tanks and contamination by the inks,
  • (c) ultrafiltration of the spent solution coming from the wiping tank or tanks, producing a clear solution and a concentrated residual solution,
  • (d) recycling of the clear solution into the cool wiping solution circuit,
  • (e) flocculation of the concentrated residual solution resulting from the ultrafiltration,
  • (f) filtration of the flocculated solution giving solid residues and a solution,
  • (g) neutralization of the filtered solution with acid,
  • (h) reduction of the chemical oxygen demand of the neutralized solution, and
  • (i) discharge to the drain of the reduced solution.

    • Un exemple d'un tel procédé est donné sous forme de schéma bloc à la figure 1.An example of such a process is given in the form of block diagram in figure 1.

    La capacité de recyclage de ce procédé après ultrafiltration est d'environ 80%, cette valeur dépendant en plus de la qualité de l'encre utilisée et de sa concentration dans la solution d'essuyage.The recycling capacity of this process after ultrafiltration is around 80%, this value additionally dependent on the quality of the ink used and of its concentration in the wiping solution.

    L'inconvénient majeur de ce procédé est que la solution résiduelle traitée et envoyée à l'égout contient une grande quantité de sel. Ces sels sont principalement des chlorures provenant des produits de floculation et de neutralisation, et ainsi que des sulfates si l'on a utilisé de l'acide sulfurique pour la neutralisation. La présence de quantité importante de chlorures et/ou de sulfates de même que la demande chimique en oxygène qui peut être considérablement réduite mais non entièrement éliminée pose des problèmes dans de nombreux pays.The major drawback of this process is that the solution treated and sent to the sewer contains a large amount of salt. These salts are mainly chlorides from flocculation products and neutralization, and also sulfates if we have used sulfuric acid for neutralization. The presence of significant amounts of chlorides and / or sulfates as well as chemical oxygen demand which can be greatly reduced but not completely eliminated poses problems in Many countries.

    En plus, en fonction du nombre de machines utilisées, la consommation d'eau et de produits de floculation peut être importante et coûteuse. Enfin, l'eau usée rejetée à l'égout a une demande biologique d'oxygène.In addition, depending on the number of machines used, consumption of water and flocculation products can be large and expensive. Finally, the wastewater discharged to the sewer has a biological demand for oxygen.

    Le but de la présente invention est de réaliser un procédé fonctionnant en circuit fermé, en particulier dans lequel la plus grande partie de l'eau et des produits de floculation en circuit est récupérée de la solution d'essuyage usée, réutilisée pour produire la solution d'essuyage fraíche et non plus rejetée à l'égout. La consommation d'eau et des produits de floculation du procédé peut ainsi être fortement diminuée et l'on obtiendra seulement des déchets solides que l'on pourra ensuite traiter dans le respect des normes de protection de l'environnement.The object of the present invention is to provide a closed circuit process, in particular in which most of the water and flocculation products in circuit is recovered from the used wiping solution, reused to produce the fresh wiping solution and no longer rejected at taste. Consumption of water and flocculation of the process can thus be strongly decreased and we will only get waste solids which can then be treated with respect environmental protection standards.

    L'invention permet aussi de ne plus utiliser de charbon actif qui corrigeait la demande chimique en oxygène.The invention also makes it possible to no longer use coal active that corrected the chemical oxygen demand.

    Un tel procédé de production de solution d'essuyage fraíche et de traitement de solution d'essuyage usée est défini par les étapes des revendications 1 et 2.Such a method of producing wiping solution fresh and used wiping solution treatment is defined by the steps of claims 1 and 2.

    Les revendications dépendantes 3 à 8 définissent des modes de réalisation particuliers du procédé selon l'invention.Dependent claims 3 to 8 define particular embodiments of the method according to the invention.

    La revendication indépendante 9 définit un dispositif de mise en oeuvre du procédé selon l'invention. Independent claim 9 defines a device for implementing the method according to the invention.

    Les revendications 10 à 18 définissent des modes de réalisation particuliers du dispositif de mise en oeuvre du procédé.Claims 10 to 18 define modes of particular realization of the setting device process work.

    La présente invention sera mieux comprise grâce à la description d'un mode de réalisation et des dessins qui l'accompagnent.The present invention will be better understood thanks to the description of an embodiment and drawings which accompany him.

    La figure 1 est le schéma bloc d'un procédé de traitement de solution d'essuyage connu dans l'état de la technique.Figure 1 is the block diagram of a method of wiping solution treatment known in the state of the technique.

    La figure 2 est le schéma bloc d'un procédé de production et de recyclage de la solution d'essuyage selon l'invention.FIG. 2 is the block diagram of a method of production and recycling of the wiping solution according to the invention.

    La figure 3 est le schéma bloc d'un dispositif de mise en oeuvre du procédé selon l'invention.Figure 3 is the block diagram of a setting device implementing the method according to the invention.

    Le procédé selon l'invention sera tout d'abord décrit en référence à la figure 2.The process according to the invention will first be described with reference to Figure 2.

    De préférence, la solution d'essuyage fraíche contient les composants suivants dans les proportions indiquées:

  • -) eau adoucie 98,5%
  • -) soude caustique NaOH 1%
  • -) huile de ricin sulfonée 0,5%
    • Preferably, the fresh wiping solution contains the following components in the proportions indicated:
  • -) softened water 98.5%
  • -) caustic soda NaOH 1%
  • -) 0.5% sulfonated castor oil

    • La solution d'essuyage peut éventuellement contenir en plus du détergent.The wiping solution may optionally contain more detergent.

    Dans l'étape (a) du procédé, la solution d'essuyage fraíche est produite en mélangeant de l'eau, de la soude caustique et de l'huile de ricin sulfonée. In step (a) of the process, the wiping solution fresh is produced by mixing water, caustic soda and sulfonated castor oil.

    La solution fraíche est introduite dans une ou plusieurs cuves d'essuyage à l'étape (b) du procédé et contaminée par les encres.
    La solution d'essuyage usée est ensuite transférée de la ou des cuves d'essuyage dans l'installation d'ultrafiltration pour subir l'étape (c) du procédé, à savoir une ultrafiltration. Cette étape (c) produit d'une part une solution claire qui est sans autre recyclée comme solution d'essuyage fraíche dans l'étape (d), et d'autre part une solution résiduelle concentrée contenant de l'encre. Cette étape d'ultrafiltration permet de récupérer environ 80% de la solution.
    La solution résiduelle concentrée subit ensuite l'étape (e) du procédé qui est une floculation. Cette floculation se produit par adjonction de chlorure de calcium CaCl2 et de chlorure ferrique FeCl3.
    Le résultat de la floculation est alors filtré dans l'étape (f) du procédé et l'on obtient ainsi des résidus solides et une solution filtrée.
    Dans l'étape (g), cette solution filtrée est neutralisée par adjonction d'acide chlorhydrique HCL. La solution neutralisée subit dans l'étape (h) une évaporation qui donne d'une part de l'eau distillée, et de l'autre une solution salée concentrée. L'eau distillée est récupérée afin de l'utiliser pour produire de la solution d'essuyage fraíche dans l'étape (i) du procédé, tandis que la solution salée concentrée est filtrée dans l'étape (j) et cette filtration donne d'un côté des sels solides et de l'autre une solution fortement concentrée en sel qui est réutilisée pour réaliser la floculation de l'étape (e) du procédé.
    L'eau distillée est envoyée dans un réservoir où elle est mélangée à de l'eau adoucie prise sur le réseau de ville. Ce mélange est utilisé finalement pour produire de la solution d'essuyage fraíche en y ajoutant de l'huile de ricin sulfonée et de la soude caustique NaOH, dans les proportions indiquées ci-dessus par exemple.    The fresh solution is introduced into one or more wiping tanks in step (b) of the process and contaminated with the inks.
    The used wiping solution is then transferred from the wiping tank (s) to the ultrafiltration installation to undergo step (c) of the process, namely ultrafiltration. This step (c) produces on the one hand a clear solution which is without further recycled as a fresh wiping solution in step (d), and on the other hand a concentrated residual solution containing ink. This ultrafiltration step makes it possible to recover approximately 80% of the solution.
    The concentrated residual solution then undergoes step (e) of the process which is flocculation. This flocculation occurs by adding calcium chloride CaCl 2 and ferric chloride FeCl 3 .
    The result of the flocculation is then filtered in step (f) of the process, and solid residues and a filtered solution are thus obtained.
    In step (g), this filtered solution is neutralized by adding hydrochloric acid HCL. The neutralized solution undergoes in stage (h) an evaporation which gives on the one hand distilled water, and on the other a concentrated saline solution. The distilled water is collected in order to use it to produce fresh wiping solution in step (i) of the process, while the concentrated salt solution is filtered in step (j) and this filtration gives d on one side of the solid salts and on the other a solution highly concentrated in salt which is reused to carry out the flocculation of step (e) of the process.
    Distilled water is sent to a tank where it is mixed with softened water taken from the city network. This mixture is finally used to produce fresh wiping solution by adding sulphonated castor oil and caustic soda NaOH, in the proportions indicated above for example.

    Ce procédé permettant de recycler presque toute l'eau, la consommation de l'eau prise sur le réseau sera très faible et compensera les éventuelles pertes.This process allows to recycle almost all the water, the consumption of water taken from the network will be very low and will compensate for any losses.

    De plus, en considérant les flèches quittant le schéma bloc de la figure 2, on voit clairement que seuls des résidus solides ne sont pas réutilisés dans ce procédé tandis que le liquide tourne en circuit fermé.In addition, considering the arrows leaving the diagram block of Figure 2, we can clearly see that only solid residues are not reused in this process while the liquid rotates in a closed circuit.

    La figure 3 représente un exemple de dispositif pour la mise en oeuvre du procédé objet de l'invention.Figure 3 shows an example of a device for implementation of the process which is the subject of the invention.

    Ce dispositif comprend un réservoir 1 dans lequel la solution usée passe et est transvasée dans un premier réservoir 2 d'ultrafiltration, d'où elle passe ensuite dans une première unité d'ultrafiltration 3. La solution claire issue de cette première unité d'ultrafiltration 3 est amenée dans un réservoir de solution fraíche 21 d'où elle est réutilisée comme solution d'essuyage fraíche, tandis que la solution résiduelle concentrée issue de cette première unité d'ultrafiltration 3 est envoyée dans un deuxième réservoir d'ultrafiltration 4 et de là dans une deuxième unité d'ultrafiltration 5. La solution claire issue de cette deuxième unité d'ultrafiltration 5 est à son tour envoyée dans le réservoir de solution fraíche 21 pour être réutilisée comme solution d'essuyage fraíche, tandis que la solution résiduelle concentrée est amenée dans un réservoir de solution concentrée 6. Cette solution résiduelle concentrée passe ensuite dans le réservoir de floculation 7 où l'étape de floculation est effectuée. Des moyens pour ajouter le chlorure de calcium CaCl2 et le chlorure ferrique FeCl3 nécessaire à la floculation sont montés sur le réservoir de floculation 7. Ces moyens comportent au moins un réservoir et une pompe de dosage pour chaque composé ajouté. La solution floculée est amenée ensuite dans un filtre presse 8 séparant les résidus solides de la solution. La solution résiduelle filtrée est stockée dans un réservoir de solution filtrée 9. Cette solution est amenée ensuite dans un réservoir de neutralisation 10 où elle est neutralisée par l'adjonction d'acide chlorhydrique HCL et récupérée dans un réservoir de solution neutralisée 11. A cet effet, des moyens pour ajouter de l'acide chlorhydrique sont montés sur le réservoir de neutralisation 10. Ces moyens comprennent au moins un réservoir et une pompe de dosage. De ce réservoir 11 de solution neutralisée, la solution est envoyée dans une première unité d'évaporation 12. La vapeur d'eau obtenue de cette première unité d'évaporation 12 est récupérée dans un réservoir d'eau distillée 17, tandis que la solution salée passe dans un réservoir de solution salée 13 puis dans une deuxième unité d'évaporation 14. La vapeur d'eau obtenue de cette seconde unité d'évaporation 14 est elle aussi récupérée dans le réservoir d'eau distillée tandis que la solution salée et concentrée passe dans un réservoir 15 et ensuite dans un système de filtration 16 duquel on extrait d'un côté des sels solides et l'autre une solution qui est recyclée par des moyens appropriés, comme par exemple une pompe, dans le réservoir de floculation 7. Du réservoir d'eau distillée 17, l'eau est envoyée dans un réservoir d'eau 19, lequel reçoit également l'eau de ville une fois que celle-ci a passé dans un adoucisseur d'eau 18, et l'eau adoucie et l'eau distillée sont envoyées dans le réservoir de mélange de solution d'essuyage 20 où la solution fraíche est préparée par adjonction d'huile de ricin sulfonée et de soude caustique. Celle-ci est finalement transportée dans le réservoir de solution fraíche 21 et passe à nouveau dans la ou les cuves d'essuyage des machines d'impression après utilisation.This device comprises a tank 1 into which the spent solution passes and is transferred into a first ultrafiltration tank 2, from which it then passes into a first ultrafiltration unit 3. The clear solution from this first ultrafiltration unit 3 is brought into a tank of fresh solution 21 from where it is reused as a fresh wiping solution, while the concentrated residual solution from this first ultrafiltration unit 3 is sent to a second ultrafiltration tank 4 and there in a second ultrafiltration unit 5. The clear solution from this second ultrafiltration unit 5 is in turn sent to the fresh solution tank 21 to be reused as a fresh wiping solution, while the concentrated residual solution is brought into a concentrated solution tank 6. This concentrated residual solution then passes into the flocculation 7 where the flocculation step is carried out. Means for adding the calcium chloride CaCl 2 and the ferric chloride FeCl 3 necessary for flocculation are mounted on the flocculation tank 7. These means comprise at least one reservoir and a metering pump for each compound added. The flocculated solution is then brought into a filter press 8 separating the solid residues from the solution. The filtered residual solution is stored in a filtered solution tank 9. This solution is then brought into a neutralization tank 10 where it is neutralized by the addition of hydrochloric acid HCL and recovered in a neutralized solution tank 11. To this Indeed, means for adding hydrochloric acid are mounted on the neutralization tank 10. These means comprise at least one tank and a metering pump. From this tank 11 of neutralized solution, the solution is sent to a first evaporation unit 12. The water vapor obtained from this first evaporation unit 12 is recovered in a tank of distilled water 17, while the solution salt passes into a salt solution tank 13 then into a second evaporation unit 14. The water vapor obtained from this second evaporation unit 14 is also recovered in the distilled water tank while the salt solution and concentrate passes into a tank 15 and then into a filtration system 16 from which one side extracts solid salts and the other a solution which is recycled by suitable means, such as for example a pump, in the flocculation tank 7 From the distilled water tank 17, the water is sent to a water tank 19, which also receives city water once it has passed through a water softener 18, and the water softened and the distilled water are sent to the wiping solution mixture tank 20 where the fresh solution is prepared by adding sulphonated castor oil and caustic soda. This is finally transported in the fresh solution tank 21 and again passes through the wiping tank or tanks of the printing machines after use.

    Afin d'effectuer le transfert des solutions dans les différents réservoirs du dispositif, des moyens de pompage sont utilisés.In order to transfer the solutions to the different reservoirs of the device, means of pumping are used.

    Les modes d'exécutions décrits sont donnés à titre d'exemple et des variations dans le cadre de la protection revendiquée sont possibles. Par exemple, la proportion des composants de la solution d'essuyage peut être légèrement variée. Ou encore, l'acide utilisé pour effectuer la neutralisation peut être de l'acide sulfurique.The modes of execution described are given for example and variations as part of the claimed protection are possible. For example, the proportion of the components of the wiping solution may be slightly varied. Or the acid used to perform neutralization can be acid sulfuric.

    Claims (18)

    Procédé de production d'une solution d'essuyage fraíche, comprenant au moins 90% d'eau et des additifs, et de traitement de la solution d'essuyage usée par les encres d'une ou plusieurs machines d'impression taille-douce, ledit procédé comportant les étapes suivantes: (a) production de la solution d'essuyage fraíche, (b) introduction de la solution d'essuyage fraíche dans une ou plusieurs cuves d'essuyage et contamination de la solution fraíche par les encres, (c) ultrafiltration de la solution usée sortant de la ou des cuves d'essuyage, produisant une solution claire et une solution concentrée, (d) recyclage de la solution claire obtenue à l'étape d'ultrafiltration en solution d'essuyage fraíche, (e) floculation de la solution concentrée obtenue à l'étape d'ultrafiltration, (f) filtration de la solution issue de la floculation, produisant des résidus solides et une solution filtrée, (g) neutralisation de la solution filtrée, et caractérisé en ce qu'il comporte en outre les étapes suivantes: (h) évaporation de la solution neutralisée, produisant une solution salée concentrée et de l'eau distillée, (i) utilisation de l'eau distillée pour produire la solution d'essuyage fraíche sous l'étape (a), (j) filtration de la solution salée concentrée produisant des sels solides et une solution. Method for producing a fresh wiping solution, comprising at least 90% of water and additives, and for treating the used wiping solution with the inks of one or more intaglio printing machines, said method comprising the following steps: (a) production of the fresh wiping solution, (b) introduction of the fresh wiping solution into one or more wiping tanks and contamination of the fresh solution with inks, (c) ultrafiltration of the spent solution leaving the wiping tank (s), producing a clear solution and a concentrated solution, (d) recycling the clear solution obtained in the ultrafiltration step into fresh wiping solution, (e) flocculation of the concentrated solution obtained in the ultrafiltration step, (f) filtration of the solution resulting from the flocculation, producing solid residues and a filtered solution, (g) neutralization of the filtered solution, and characterized in that it also comprises the following steps: (h) evaporation of the neutralized solution, producing a concentrated salt solution and distilled water, (i) use of distilled water to produce the fresh wiping solution under step (a), (j) filtration of the concentrated salt solution producing solid salts and a solution. Procédé selon la revendication 1, caractérisé en ce que la solution filtrée issue de l'étape (j) de filtration de solution salée concentrée est utilisée pour réaliser la floculation de l'étape (e). Method according to claim 1, characterized in that that the filtered solution from step (j) of concentrated salt solution filtration is used to carry out the flocculation of step (e). Procédé selon la revendication 1 ou 2, caractérisé en ce que la solution d'essuyage fraíche contient de l'eau adoucie, de l'huile de ricin sulfonée et de la soude caustique NaOH.Method according to claim 1 or 2, characterized in that the fresh wiping solution contains softened water, sulfonated castor oil and caustic soda NaOH. Procédé selon la revendication 3, caractérisé en ce que la solution d'essuyage fraíche contient environ 98,5% d'une solution aqueuse, environ 1% de soude caustique NaOH et environ 0,5% d'huile de ricin sulfonée.Method according to claim 3, characterized in that the fresh wiping solution contains approximately 98.5% of an aqueous solution, approximately 1% of soda caustic NaOH and about 0.5% castor oil sulfonated. Procédé selon l'une des revendications 1 à 4, caractérisée en ce que la floculation est produite par l'ajout de chlorure de calcium CaCl2 et de chlorure ferrique FeCl3.Method according to one of claims 1 to 4, characterized in that the flocculation is produced by the addition of calcium chloride CaCl 2 and ferric chloride FeCl 3 . Procédé selon l'une des revendications 1 à 5, caractérisée en ce que la neutralisation est effectuée avec de l'acide chlorhydrique ou avec de l'acide sulfurique.Method according to one of claims 1 to 5, characterized in that neutralization is carried out with hydrochloric acid or with acid sulfuric. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que ledit procédé comporte deux étapes d'ultrafiltration successives.Method according to one of claims 1 to 6, characterized in that said method comprises two successive ultrafiltration stages. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que ledit procédé comporte deux étapes d'évaporation successives.Method according to one of claims 1 to 7, characterized in that said method comprises two successive stages of evaporation. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications précédentes, comprenant au moins un réservoir de solution d'essuyage fraíche (21), un réservoir de solution d'essuyage usée (1), un réservoir de recyclage par ultrafiltration (2), une unité d'ultrafiltration (3) dont une sortie délivre une solution claire et est reliée au réservoir de solution fraíche (21) et l'autre sortie une solution résiduelle concentrée, un réservoir de solution concentrée (6) recevant la solution résiduelle concentrée, un réservoir de floculation (7) dans lequel s'effectue la floculation de la solution résiduelle concentrée, un filtre presse (8) filtrant la solution résiduelle floculée, un réservoir de solution filtrée (9) récupérant la solution issue du filtre presse (8), un réservoir de neutralisation (10) dans lequel la solution est neutralisée suivi d'un réservoir de solution neutralisée (11), et caractérisé en ce qu'il comporte en outre une unité d'évaporation (12) recevant la solution neutralisée du réservoir de solution neutralisée (11), un réservoir d'eau distillée (17) recevant l'eau de l'unité d'évaporation (12), un réservoir de solution salée et concentrée (15) recevant la solution quittant l'unité d'évaporation (12), un système de filtration (16) filtrant la solution salée et concentrée et produisant des résidus solides et une solution résiduelle, et des moyens de pompage pour transférer lesdites solutions de l'un desdits réservoirs dans l'autre.Device for implementing the method according to one of the preceding claims, comprising less a reservoir of fresh wiping solution (21), a spent wiping solution tank (1), a ultrafiltration recycling tank (2), one ultrafiltration unit (3), one outlet of which delivers clear solution and is connected to the solution tank fresh (21) and the other outlet a residual solution concentrate, a tank of concentrated solution (6) receiving the concentrated residual solution, a flocculation tank (7) in which the flocculation of the concentrated residual solution, a filter press (8) filtering the residual solution flocculated, a filtered solution tank (9) recovering the solution from the filter press (8), a neutralization tank (10) in which the solution is neutralized followed by a reservoir of neutralized solution (11), and characterized in that it further includes an evaporation unit (12) receiving the neutralized solution from the solution tank neutralized (11), a distilled water tank (17) receiving the water from the evaporation unit (12), a salt and concentrated solution tank (15) receiving the solution leaving the evaporation unit (12), a filtration system (16) filtering the salt solution and concentrated and producing solid residues and a residual solution, and pumping means for transfer said solutions from one of said tanks in the other. Dispositif selon la revendication 9, caractérisé en ce qu'il comporte des moyens pour amener la solution résiduelle filtrée issue du système de filtration (16) dans le réservoir de floculation (7).Device according to claim 9, characterized in what it includes means to bring the solution filtered residual from the filtration system (16) in the flocculation tank (7). Dispositif selon la revendication 9 ou 10, caractérisé en ce qu'il comporte en outre un réservoir d'eau (19) recevant de l'eau adoucie d'un adoucisseur (18) et l'eau distillée du réservoir d'eau distillée (17), un réservoir de mélange de solution d'essuyage (20) produisant la solution d'essuyage fraíche recevant l'eau du réservoir d'eau (19) et relié au réservoir de solution fraíche (21).Device according to claim 9 or 10, characterized in that it further comprises a reservoir water (19) receiving softened water from a softener (18) and the distilled water from the distilled water tank (17), a tank for mixing the wiping solution (20) producing the fresh wiping solution receiving water from the water tank (19) and connected to the fresh solution (21). Dispositif selon l'une des revendications 9 à 11, caractérisé en ce que la solution d'essuyage fraíche contient de l'eau adoucie, de l'huile de ricin sulfonée et de la soude caustique NaOH.Device according to one of claims 9 to 11, characterized in that the fresh wiping solution contains softened water, sulfonated castor oil and NaOH caustic soda. Dispositif selon l'une des revendications 9 à 12, caractérisé en ce que la solution d'essuyage fraíche contient environ 98,5% d'une solution aqueuse, environ 1% de soude caustique NaOH et environ 0,5% d'huile de ricin sulfonée.Device according to one of claims 9 to 12, characterized in that the fresh wiping solution contains approximately 98.5% of an aqueous solution, approximately 1% NaOH caustic soda and about 0.5% sulfonated castor. Dispositif selon l'une des revendications 9 à 13, caractérisé en ce qu'il comporte des moyens pour ajouter de la soude caustique NaOH et de l'huile de ricin sulfonée dans le réservoir de mélange de solution d'essuyage fraíche (20).Device according to one of claims 9 to 13, characterized in that it includes means for add NaOH caustic soda and oil sulphonated castor in the solution mixing tank of fresh wiping (20). Dispositif selon l'une des revendications 9 à 14, caractérisé en ce qu'il comporte des moyens pour ajouter du chlorure de calcium CaCl2 et du chlorure ferrique FeCl3 dans le réservoir de floculation (7).Device according to one of claims 9 to 14, characterized in that it comprises means for adding calcium chloride CaCl 2 and ferric chloride FeCl 3 in the flocculation tank (7). Dispositif selon l'une des revendications 9 à 15, caractérisé en ce qu'il comporte des moyens pour ajouter de l'acide chlorhydrique HCL ou de l'acide sulfurique dans le réservoir de neutralisation (10).Device according to one of claims 9 to 15, characterized in that it includes means for add hydrochloric acid HCL or acid sulfuric in the neutralization tank (10). Dispositif selon l'une des revendications 9 à 16, caractérisé en ce qu'il comporte un deuxième réservoir de recyclage par ultrafiltration (4) et une deuxième unité d'ultrafiltration (5) suivant l'unité d'ultrafiltration (3) et en ce que la sortie de la deuxième unité d'ultrafiltration (5) délivrant une solution claire est reliée au réservoir de solution fraíche (21).Device according to one of claims 9 to 16, characterized in that it comprises a second tank recycling by ultrafiltration (4) and a second ultrafiltration unit (5) depending on the unit ultrafiltration (3) and in that the outlet of the second ultrafiltration unit (5) delivering a clear solution is connected to the solution tank fresh (21). Dispositif selon l'une des revendications 9 à 17, caractérisé en ce qu'il comporte une deuxième unité d'évaporation (14) suivant l'unité d'évaporation (12) et en ce que le réservoir d'eau distillée (17) reçoit l'eau de la deuxième unité d'évaporation (14).Device according to one of claims 9 to 17, characterized in that it comprises a second unit of evaporation (14) according to the evaporation unit (12) and in that the distilled water tank (17) receives water from the second evaporation unit (14).
    EP97810589A 1996-09-02 1997-08-21 Method and means for realising a fresh cleaning solution and for treating the used solution Expired - Lifetime EP0826502B1 (en)

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    EP2363290A1 (en) 2010-03-05 2011-09-07 KBA-NotaSys SA Installation and process for recycling wiping solution of one or more intaglio printing presses
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    EP2363290A1 (en) 2010-03-05 2011-09-07 KBA-NotaSys SA Installation and process for recycling wiping solution of one or more intaglio printing presses
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    EP2684697A1 (en) * 2012-07-09 2014-01-15 Oesterreichische Banknoten- und Sicherheitsdruck GmbH Treatment plant

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    KR19980023916A (en) 1998-07-06
    CA2193303A1 (en) 1998-03-03
    CN1175625A (en) 1998-03-11
    JP4035593B2 (en) 2008-01-23
    CA2193303C (en) 2005-04-12
    DE69702032T2 (en) 2001-01-18
    JPH1085789A (en) 1998-04-07
    AU1239597A (en) 1998-03-05
    KR100433740B1 (en) 2004-09-16
    AU722323B2 (en) 2000-07-27
    DE69702032D1 (en) 2000-06-21
    CN1116398C (en) 2003-07-30
    ATE192972T1 (en) 2000-06-15
    US5855787A (en) 1999-01-05
    EP0826502B1 (en) 2000-05-17
    UA28061C2 (en) 2000-10-16

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