Extruded Polymer Filter Device Backflush Cleaning
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Solution Overview
Problem
Filter devices with backflush cleaning systems face limitations in cleaning strength and flow rate, leading to potential breakage of filter screens and polymer chains, as well as stagnation issues that cause wear, due to excessive pressure and geometry-related issues.
Innovation Solution
A filter device with a containment body and support structure that allows for controlled backflush cleaning, utilizing slide guides and drainage channels to manage pressure and flow, preventing excessive interference and stagnation by moving the support body to optimize cleaning while minimizing polymer waste and maintaining pressure to detach dirt effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high pressure is increased to detach and drain accumulated material from filter screens, then cleaning effectiveness is improved, but filter screens risk breakage and polymer chains may break
Solution Approach 1:
The filter assembly is divided into multiple screens arranged in series, with each screen handling a portion of the filtration task. This segmentation allows the backflush pressure to be distributed across multiple elements rather than concentrating stress on a single screen, enabling effective cleaning while preventing individual screen breakage
Solution Approach 2:
The system dynamically adjusts the backflush pressure based on the accumulation level of material on the screens. By controlling the pressure to remain below the breakage threshold while sufficient for detachment, the system achieves effective cleaning without compromising screen integrity or causing polymer chain breakage
2Device complexity
If conventional backflush geometry is used, then device simplicity is maintained, but stagnation of treated material occurs leading to wear
Solution Approach 1:
The invention introduces a longitudinal dimension to the backflush flow path by arranging screens in series along the flow direction. This dimensional change eliminates stagnant zones by ensuring continuous material movement through the entire filter assembly, preventing wear while maintaining geometric simplicity
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 solution enables effective cleaning of filter assemblies without risking breakage, reduces polymer chain breakage, and prevents stagnation-related wear, ensuring efficient and safe operation by allowing high-pressure backflush flow while controlling waste and maintaining filter integrity.
Implementation Method 1
a certain amount of already filtered material, at high pressure, is conveyed towards the filter surfaces to be cleaned in the opposite direction with respect to the normal working direction
Implementation Method 2
The support body (8) is slidably inserted in the cavity (3) and has a seat (9) for housing a filter assembly (10)... moving the support body to optimize cleaning
Data Source
AI summary
Filter device (1) for filtering extruded polymers comprising a containment body (2) defining at least one cavity (3), an inlet opening (4) in fluid communication with the cavity (3) via a respective inlet conduit (5), and an outlet opening (6) in fluid communication with the cavity (3) via a respective outlet conduit (7), and a support body (8) slidably inserted in the cavity (3) and interposed between the respective inlet conduit (5) and the respective outlet conduit (7) and having a seat (9) for housing a filter assembly (10) consisting of two perforated disks (11) and a filter screen located between the two perforated disks (11). The seat (9) has an inlet section (13a) having dimensions equal to an outlet mouth (5a) of the inlet conduit (5), and an outlet section (12a) with dimensions that are larger than the dimensions of the inlet section (13a) and equal to a maximum extension of an inlet mouth (7a) of the outlet conduit (7).The support body (8) is slidably movable in the cavity (3) along a main direction of movement (L) so as to produce different partializations of the perforated disk (11) associated with the outlet section (12a) of the seat (9).