RU96122393A - METHOD FOR PRODUCING FRESH RINSING MATERIAL AND PROCESSING USED SOLUTION AND DEVICE FOR IMPLEMENTING THE METHOD - Google Patents

Claims (18)

1. A method of manufacturing a fresh washing solution, which contains at least 90% water and additives, and processing the named solution mixed with printing ink of one or more gravure printing machines, characterized in that the said method consists of the following steps:
a) obtaining a washing solution to remove ink;
b) filling one or more baths with the named washing solution and mixing the washing solution with printing ink;
c) ultrafiltration of the spent washing solution coming from one or more of the named baths with a washing solution, obtaining a pure solution and a concentrated residue;
d) returning the clean solution to the fresh detergent solution circuit;
d) flocculation of the concentrated residue obtained after ultrafiltration;
e) filtering the solution obtained after flocculation, with the receipt of dry waste and filtrate;
g) neutralization of the filtrate with acid;
h) evaporation of the neutralized solution to obtain a concentrated brine and distilled water;
i) the use of distilled water to obtain a fresh washing solution according to paragraph (a);
j) filtering the concentrated brine to obtain solid salts and a liquid residue.  2. The method according to claim 1, characterized in that the liquid residue obtained in step (k) is reused to perform the flocculation step (d).  3. The method according to claim 1 or 2, characterized in that the fresh washing solution contains softened water, sulfonated castor oil and caustic soda NaOH.  4. The method according to claim 3, characterized in that the fresh washing solution contains about 98.5% water, about 1% caustic soda NaOH and about 0.5% sulfonated castor oil. 5. The method according to one of claims 1 to 4, characterized in that flocculation is performed by adding calcium chloride CaCl ₂ and iron chloride FeCl ₃ .  6. The method according to one of claims 1 to 5, characterized in that the neutralization is carried out with the addition of hydrochloric or sulfuric acid.  7. The method according to one of claims 1 to 6, characterized in that the said method includes two successive stages of ultrafiltration.  8. The method according to one of claims 1 to 7, characterized in that said method comprises two successive stages of evaporation.  9. A device for producing fresh washing solution and processing spent washing solution, characterized in that said device comprises at least a fresh solution tank (21), a waste solution tank (1) for regenerating a spent washing solution, an ultrafiltration tank (2), which from the tank of the spent solution (1) the spent washing solution, the ultrafiltration apparatus (3) connected to the ultrafiltration tank (2), the ultrafiltration apparatus (3) containing the outlet pipe for transporting chi plain solution, which is connected to the fresh solution tank (21), and another outlet pipe for transporting the concentrated residue, which is connected to the concentrated solution tank (6), flocculation tank (7), in which the flocculation of the residue occurs, filter press (8) for filtering the residue after flocculation, a filtrate tank (9), where the solution enters after the filter press (8), a neutralization tank (10) for neutralizing the filtrate, behind which a neutralized solution tank (11), an evaporator (12), into which comes neutralizing An aqueous solution from a neutralized solution tank (11), a distillate tank (17), into which water enters from an evaporator (12), a tank of concentrated brine (13), into which a saline solution comes from an evaporator (12), and a filtration system ( 16), in which concentrated brine is filtered, to obtain dry salt and residue, and pumping equipment for transporting these solutions and waste from one of these containers to others.  10. The device according to claim 9, which includes means for transferring the filtrate of the liquid residue from the filtration system (16) to the flocculation tank (7).  11. The device according to claim 9 or 10, characterized in that it includes a container of water (19), into which softened water from the softener (18) enters, and distilled water from the distillate tank (17), a container for receiving fresh washing solution (19), which is connected to a tank of fresh solution (21).  12. The device according to one of claims 9 to 11, characterized in that the fresh washing solution contains softened water, sulfonated castor oil and caustic soda NaOH.  13. The device according to one of claims 9 to 12, characterized in that the fresh washing solution contains about 98.5% water, about 1% caustic soda NaOH and about 0.5% sulfonated castor oil.  14. The device according to one of claims 9 to 13, characterized in that it includes means for introducing caustic soda NaOH and sulfonated castor oil into a container to obtain a fresh washing solution (20). 15. The device according to one of claims 9-14, characterized in that it includes means for introducing calcium chloride CaCl ₂ and iron chloride FeCl ₃ into the flocculation tank (7).  16. The device according to one of claims 9 to 15, characterized in that it includes means for introducing hydrochloric acid or sulfuric acid into the neutralization tank (10).  17. The device according to one of claims 9-16, characterized in that it comprises a second ultrafiltration tank (4) and a second ultrafiltration apparatus (5) located after the said ultrafiltration apparatus (3), in which the outlet pipe of the said second apparatus ultrafiltration is associated with the named fresh solution tank (21).  18. The device according to one of paragraphs.9-17, characterized in that its composition includes a second evaporator (14), included after the named evaporator (12), in which the capacity of the distillate (17) receives water from the named evaporator ( fourteen).