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KR-20260063787-A - PURIFY AND REUSE SYSTEM FOR WASTE INK

KR20260063787AKR 20260063787 AKR20260063787 AKR 20260063787AKR-20260063787-A

Abstract

The present invention relates to a purification and reuse system for ink wastewater that separates ink solids by adding a coagulant and a neutralizing agent to collected ink wastewater, and purifies the wastewater into purified water through odor removal and filtration for reuse. To solve the above problem, the purification and reuse system for ink wastewater according to the present invention comprises: a collection tank in which collected ink wastewater is stored; a chemical tank in which a chemical that coagulates the ink components of the ink wastewater is contained; a mixing tank in which the ink wastewater stored in the collection tank and the chemical contained in the chemical tank are received and mixed; a pressure filter that separates the floc and suspension formed by mixing the ink wastewater and the chemical in the mixing tank; a filtration array that sequentially filters and purifies the suspension separated in the pressure filter; and a water purification tank that stores the purified water filtered in the filtration array.

Inventors

  • 이상규

Assignees

  • 이상규

Dates

Publication Date
20260507
Application Date
20241031

Claims (8)

  1. A collection tank (10) in which collected ink wastewater is stored; A chemical tank (20) containing a chemical that coagulates the ink components of the ink wastewater; A mixing tank (30) that mixes ink wastewater stored in the above-mentioned collection tank (10) and chemicals contained in the above-mentioned chemical tank (20); A pressure filter (40) that separates the floc and suspension formed by mixing ink wastewater and chemicals in the above mixing tank (30); A filtration array (50) that sequentially filters and purifies the suspension separated from the pressure filter (40); and A water purification tank (60) for storing purified water filtered in the above filtration array (50); A purification and reuse system for ink wastewater characterized by including
  2. In claim 1, The above filtration array (50) is, A first filter (100) that filters the suspension separated from the pressure filter (40) and discharges it as primary purified water; A second filter (200) that filters primary purified water discharged from the first filter (100) and discharges it as secondary purified water; and A third filter (300) that filters the secondary purified water discharged from the second filter (200) and discharges it as purified water; A purification and reuse system for ink wastewater including
  3. In claim 2, An ink wastewater purification and reuse system characterized by including a deodorizer (400) that removes odors contained in a suspension between the first filter (100) and the second filter (200).
  4. In claim 2, A recovery channel (220) is configured to return the primary purified water discharged from the second filter (200) to the mixing tank (30), and An ink wastewater purification and reuse system characterized by having a recovery valve (221) configured on the recovery path (220) to control the path.
  5. In claim 2, Between the second filter (200) and the third filter (300), a water tank (500) for storing secondary purified water filtered in the second filter (200) is configured, and A recovery path (320) for recovering secondary purified water that is not filtered in the third filter (300) to the gray water tank (500); and A recovery channel filter (330) installed on the recovery channel (320) to filter secondary purified water passing through the recovery channel (320); A purification and reuse system for ink wastewater characterized by further including
  6. In claim 5, A backwash pump (510) that pumps secondary purified water stored in the above-mentioned water tank (500) and supplies it to the above-mentioned second filter (200); is configured, An ink wastewater purification and reuse system characterized by backwashing the second filter (200) with secondary purified water pumped by the backwash pump (510).
  7. In claim 1, The above mixing tank (30) is characterized by being composed of multiple units, in an ink wastewater purification and reuse system.
  8. In claim 1, A purification and reuse system for ink wastewater characterized in that the purified water stored in the above-mentioned purification tank (60) is reused as washing water for washing printing plates.

Description

Purification and Reuse System for Ink Wastewater The present invention relates to a purification and reuse system for ink wastewater, wherein a coagulant and a neutralizing agent are added to collected ink wastewater to separate ink solids, and the wastewater is purified into purified water through odor removal and filtration for reuse. Flexographic printing using a flexographic printing press is a printing method that uses a flexible and elastic resin plate and water-based, solvent evaporative drying, or UV-curing ink. Generally, to perform printing operations with various patterns on corrugated cardboard, packaging paper, label paper, etc., it is a device that applies liquid volatile ink to a printing plate made of elastic synthetic resin or rubber material and then performs printing operations on the substrate. Flexographic printing involves a printing process where various types of ink are transferred as printing operations are repeated, causing the printing plate to become easily contaminated. Since the accumulation of ink as well as various contaminants on the printing plate adversely affects the printing process, the printing plate is separated from the printing cylinder and periodic cleaning is performed. Printing plates can be easily cleaned using a printing plate washing machine, but such printing plate washing machines generate ink wastewater as they clean the printing plates. As a technology for treating conventional ink wastewater, a method for dewatering an aqueous suspension is disclosed in Registered Patent Publication No. 10-0213669. According to Registered Patent Publication No. 10-0213669, a method for dewatering an aqueous suspension involves coagulating the suspension with a cationic polymerizable coagulant, then coagulating the coagulated material by an anionic colloidal material mixed into the coagulated suspension, optionally adding an additional cationic coagulant, and subsequently separating the coagulated material from the suspension by a belt press or other pressure filtration to recover waste suspension containing ink recovered from a paper deinking process. The dehydration method for aqueous suspensions involves recovering the suspension from ink wastewater, but it has the disadvantage that the suspension contained in the ink wastewater also contains a large amount of moisture, and the water contained in the ink wastewater cannot be reused. Ink wastewater drying treatment device is disclosed in Registered Utility Model Publication No. 20-0317454. The ink wastewater drying treatment device comprises an ink wastewater storage container formed to accommodate a certain amount of ink wastewater, a cylindrical drying roller section rotatably installed transversely in the ink wastewater storage container, a driving device connected to the drying roller section to apply driving force to rotate the drying roller section, a heating device installed on the drying roller section to heat its surface, a blade section installed at an angle so that its upper end is close to the surface of the drying roller section on one side of the drying roller section, and a drying ink collection container installed to receive the drying ink on the surface of the drying roller section removed by the blade section. Although an ink wastewater drying treatment device can obtain solidified ink by drying ink wastewater, it has the disadvantage of increasing treatment costs due to the large amount of heat consumed during the drying process, and potentially polluting the atmosphere as toxic compounds evaporate simultaneously during the process of water evaporation contained in the wastewater. FIG. 1 is a schematic diagram of a purification and reuse system for ink wastewater according to the present invention. FIG. 2 is a plurality of configuration diagrams of mixing tanks applied to an ink wastewater purification and reuse system according to the present invention. FIG. 3 is an overall configuration diagram applied to the ink wastewater purification and reuse system according to the present invention. FIG. 4 shows the backwashing configuration of a second filter applied to an ink wastewater purification and reuse system according to the present invention. Next, a preferred embodiment of the ink wastewater purification and reuse system according to the present invention will be described in detail with reference to the drawings. In the following, the same reference numerals are used for technical elements that perform the same function, and repeated detailed descriptions are omitted to avoid redundant explanations. Furthermore, the embodiments described below are provided as examples to effectively demonstrate preferred embodiments of the present invention and should not be interpreted to limit the scope of the present invention. The present invention relates to a purification and reuse system for ink wastewater that separates ink solids by adding a coagulant and a neutralizing agent to collected ink wastewater, a