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AssigneeDe La Rue Giori S.A.
InventorFausto Giori
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A process for producing a fresh wiping solution, comprising at least 90% of water and additives, and for treating said solution once used by the inks of one or more intaglio printing machines, wherein said process comprises the following steps: (a) production of fresh wiping solution, (b) introduction of the fresh wiping solution in one or several wiping tanks and contamination of the fresh wiping solution by the inks, (c) ultrafiltration of the used solution producing a clear solution and a concentrated residual solution, (d) recycling of the clear solution, (e) flocculation of the concentrated residual solution, (f) filtration of the flocculated solution giving solid waste and a filtered solution, (g) neutralization of the filtered solution, (h) evaporation of the neutralized solution producing a concentrated salty solution and distilled water, (i) use of the distilled water for producing fresh wiping solution and (j) filtration of the concentrated salty solution.
A process for treating a wiping solution, comprising at least 90% of water and additives, introduced in one or several wiping tanks and used by the inks of one or more intaglio printing machines, wherein said process comprises the following steps:
Apparatus for producing a fresh wiping solution and for treating the wiping solution once used, wherein said apparatus at least comprises a fresh solution tank (21), a used solution tank (1) recuperating the used wiping solution, an ultrafiltration recycling tank (2) receiving the used wiping solution from the used solution tank (1), an ultrafiltration unit (3) connected to the ultrafiltration tank (2), said ultrafiltration unit (3) having an outlet delivering a clear solution and linked to the fresh solution tank (21) and another outlet delivering a concentrated residual solution and linked to a concentrated solution tank (6), a flocculation tank (7) in which the flocculation of the residual solution is carried out, a filter press (8) filtering the flocculated residual solution, a filtered solution tank (9) receiving the solution exiting the filter press (8), a neutralisation tank (10) in which the filtered solution is neutralised and followed by a neutralised solution tank (11), an evaporation unit (12) receiving the neutralised solution from the neutralised solution tank (11), a distilled water tank (17) receiving the water of the evaporation unit (12), a concentrated salty solution tank (13) receiving the salty solution from the evaporation unit (12), a filtration system (16) filtering the concentrated salty solution and producing solid salts and a residual solution.
Dependencies are inferred from the claim text.