Paper Machine Band Cleaning with Adaptive Nozzle Control
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Solution Overview
Problem
Traditional paper making machine band cleaning systems lack control over washing intensity, leading to uneven cleaning, band clogging, poor drainage, wear, and wasteful energy and water consumption.
Innovation Solution
A cleaning system with a detecting device to assess band conditions and a control device to regulate a cleaning fluid jet, ensuring targeted and efficient cleaning, minimizing energy and water usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional washing devices spray water at appropriate pressure onto the band, then the band is cleaned, but the cleaning is not controlled and does not differentiate washing intensity, leading to waste of energy and water
Solution Approach 1:
The system applies different washing intensities to different areas of the band based on detected soiling levels. The control device activates specific nozzles or adjusts water pressure locally where needed, rather than uniformly washing the entire band, thereby reducing overall water and energy consumption while maintaining effective cleaning.
Solution Approach 2:
The system dynamically changes washing parameters (water pressure, flow rate, nozzle activation) based on real-time detection of band conditions. The control device adjusts these parameters according to the detected soiling level, enabling adaptive cleaning that optimizes resource usage while ensuring effective removal of contaminants.
2Reliability
If washing intensity is increased to improve cleaning effectiveness, then the band is cleaned more thoroughly, but excessive cleaning causes wear on the band, compromising its life
Solution Approach 1:
The system applies washing intensity proportional to the detected soiling level in each area. Only regions requiring cleaning receive water spray, and the intensity is matched to the contamination level, avoiding unnecessary wear on already clean areas and extending band life while maintaining thorough cleaning where needed.
Solution Approach 2:
The detection device provides real-time feedback on band soiling conditions to the control device, which adjusts washing intensity accordingly. This closed-loop control prevents excessive washing by continuously monitoring band conditions and modulating water application to match actual cleaning needs, thereby reducing wear while ensuring thorough cleaning.
3Reliability
If uniform washing is applied to the entire band, then all areas are cleaned, but the band clogging process is often not uniform, resulting in insufficient or excessive cleaning in different sections
Solution Approach 1:
The system transitions from uniform washing to localized cleaning by detecting soiling levels in different band sections and applying water spray only where contaminants are present. The control device selectively activates nozzles corresponding to detected soiling areas, achieving both comprehensive coverage and precise targeting of cleaning needs.
Solution Approach 2:
The washing system is divided into multiple independent nozzle zones corresponding to different band sections. The control device independently controls each zone based on local detection results, enabling segmented cleaning that matches the non-uniform clogging pattern and achieves both complete coverage and area-specific precision.
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 system provides effective cleaning while reducing energy and water consumption, ensuring reliable and efficient band maintenance without compromising the band's integrity.
Implementation Method 1
detecting device (4) configured to detect at least one parameter indicative of the cleaning conditions of the band (2)
Implementation Method 2
cleaning device (5) provided with at least one nozzle (9) for generating a jet of cleaning fluid; the nozzle (9) being arranged so that the jet of water is directed towards the band (2)
Data Source
AI summary
A cleaning system for cleaning a band circulating in a paper making machine; the system comprising:at least one detecting device configured to detect at least one parameter indicative of the cleaning conditions of the band on at least one portion of the band;at least one cleaning device provided with at least one nozzle to create a jet of a cleaning fluid; the nozzle being arranged so that the jet of cleaning fluid is directed towards the band;a control device configured to regulate the cleaning device on the basis of the at least one parameter indicative of the cleaning of the band.