Intaglio Printing Wiping Solution Recycling System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current recycling processes for intaglio printing press wiping solutions face issues with clogged ultra-filtration membranes, high maintenance costs, and reduced recycling yield due to the use of flocculating agents like calcium chloride, which can cause rusting and oxidation of metallic parts.
Innovation Solution
A recycling system involving flocculation tanks, centrifugation units, and filtering units to separate and process waste solutions, reducing the need for chemical agents and minimizing membrane clogging, with centrifugation efficiently separating ink constituents and filter aid agents, thereby enhancing recycling efficiency and simplifying maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ultra-filtration membranes are used to recycle wiping solution, then recycling efficiency is improved, but membrane clogging occurs leading to high maintenance costs
Solution Approach 1:
The patent applies preliminary action by performing flocculation before ultra-filtration to pre-remove ink constituents from the wiping solution. This preliminary treatment prevents these constituents from reaching and clogging the ultra-filtration membranes during the recycling process, thereby maintaining both high recycling efficiency and low maintenance costs.
2Loss of substance
If flocculating agents like calcium chloride are used to process waste solution, then ink constituents are removed, but metallic parts rust and oxidize
Solution Approach 1:
The patent applies parameter changes by replacing calcium chloride with sodium chloride as the flocculating agent. This substitution changes the chemical parameters of the system - sodium chloride does not promote rusting and oxidation of metallic parts while still effectively removing ink constituents through flocculation, thus eliminating the harmful effects while maintaining the beneficial function.
3Loss of substance
If chemical agents are used to process waste wiping solution, then ink constituents are separated, but chemical agent consumption increases costs
Solution Approach 1:
The patent applies the taking out principle by extracting and removing ink constituents from the wiping solution through flocculation and centrifugation before the ultra-filtration step. This extraction of problematic substances beforehand reduces the load on subsequent processing stages, allowing for more efficient recycling with reduced chemical agent consumption and lower operational costs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed system achieves high recycling efficiency, reduces chemical agent consumption, and minimizes maintenance costs by effectively separating ink constituents and filter aid agents, leading to a more efficient and cost-effective recycling process for intaglio printing press wiping solutions.
Implementation Method 1
a centrifugation unit for separating the waste solution coming from the flocculation tank by centrifugation into precipitate and centrifuged supernatant
Implementation Method 2
a flocculation tank for inducing flocculation of ink constituents contained in waste solution coming from the one or more intaglio printing presses
Implementation Method 3
a filtering unit, preferably a filter press unit, for filtering the waste solution coming from the processing tank and producing recycled solution
Data Source
AI summary
There is described an installation (01; 02) for recycling wiping solution of one or more intaglio printing presses (10) comprising a flocculation tank (12) for inducing flocculation of ink constituents contained in waste solution coming from the one or more intaglio printing presses (10), a processing tank (14) for pre-treating the waste solution for subsequent filtering, and a filtering unit (15), preferably a filter press unit, for filtering the waste solution coming from the processing tank (14) and producing recycled solution at an output of the filtering unit (15), which recycled solution is recycled to produce fresh wiping solution for use by the one or more intaglio printing presses (10). According to one embodiment, the installation (01) further comprises a centrifugation unit (13) for separating the waste solution coming from the flocculation tank (12) by centrifugation into precipitate and centrifuged supernatant, which centrifuged supernatant is fed to the processing tank (14). According to a second embodiment, the installation (02) further comprises a decantation unit (13a) for separating the waste solution coming from the flocculation tank (12) by decantation into precipitate and decanted supernatant, which decanted supernatant is fed to the processing tank (14), and a centrifugation unit (13b) for further separating the precipitate produced by the decantation unit (13a) by centrifugation into further precipitate and centrifuged supernatant, which centrifuged supernatant is fed to the processing tank (14). There are also described corresponding processes for recycling wiping solution.