Continuous Felt Cleaning System for Paper Machines

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Solution Overview

Problem

Existing systems for treating felts and screens in paper and cellulose machines are inefficient, leading to interruptions in production, non-uniform moisture content, and environmental hazards due to the use of harmful substances, with limitations in individualized treatment and high water and chemical product consumption.

Innovation Solution

A system utilizing heated and pressurized chemical solutions or enzymes, with a network of tanks, thermodynamic equipment, and strategically positioned showers or ejector devices for continuous and intermittent treatment, incorporating fresh water filters, steam condensate extraction, and telescopic shower nozzles for targeted application and reduced consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional cleaning methods are used for felts and screens, then production must be interrupted for cleaning, but this causes loss of production time and reduced productivity

Engineering Contradiction:

Improveproduction continuityVSAvoidproduction interruption time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The system enables continuous cleaning of felts and screens during paper machine operation by injecting chemical cleaning solutions through nozzles positioned along the felt and screen paths. The cleaning action occurs continuously as the materials move through the machine, eliminating the need to stop production for cleaning maintenance.

Inventive Principle:

Principle #20Continuity of useful action

2Productivity

If chemical cleaning solutions are applied to felts and screens, then cleaning efficiency is improved, but water and chemical product consumption increases

Engineering Contradiction:

Improvecleaning efficiencyVSAvoidwater and chemical consumption

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

The system applies chemical cleaning solutions locally at specific positions where felts and screens require cleaning, rather than using blanket washing methods. Chemical solutions are injected through targeted nozzles at locations of maximum need, reducing overall consumption while maintaining effective cleaning where required.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system uses pressurized injection of chemical solutions through hydraulic nozzles to deliver cleaning agents directly to the felts and screens. This hydraulic delivery method ensures precise application with minimal waste, as the pressurized jets target specific areas rather than flooding entire sections with water and chemicals.

Inventive Principle:

Principle #29Pneumatics and hydraulics

3Productivity

If harmful substances are used for cleaning, then cleaning effectiveness is improved, but environmental damage and effluent treatment costs increase

Engineering Contradiction:

Improvecleaning effectivenessVSAvoidenvironmental pollution

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The system changes the chemical parameters of the cleaning solutions by using biodegradable enzymes and controlled concentrations of cleaning agents. The chemical solutions are formulated with specific pH levels and compositions that maintain cleaning effectiveness while being environmentally friendly and reducing harmful environmental impacts.

Inventive Principle:

Principle #35Parameter changes

4Device complexity

If uniform chemical solution is applied to all felts and screens, then system simplicity is maintained, but individualized treatment needs of different fabrics cannot be met

Engineering Contradiction:

Improvesystem uniformityVSAvoidindividualized treatment capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The system provides individualized treatment for different felts and screens by positioning multiple nozzles at different locations along the machine, each delivering chemical solutions tailored to the specific cleaning needs of different fabric sections. This allows customized cleaning zones while maintaining a relatively simple overall system structure.

Inventive Principle:

Principle #3Local quality

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

Enables continuous, efficient cleaning with reduced water and chemical usage, improved sheet quality, increased machine stability, and extended felt lifespan, while minimizing environmental impact and production interruptions.

Implementation Method 1

heated and pressurized chemical solution or homogenized enzymes

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

heated and pressurized chemical solution

Methodology Applied

Scientific EffectPressurization: Pressurisation

Implementation Method 3

steam condensate extraction

Methodology Applied

Scientific EffectCondensation: Condensation

Implementation Method 4

strategically positioned on the machines to be treated, or the parts thereof

Methodology Applied

Scientific EffectFluid Spray: Fluid Spray

Data Source

PatentEP2043792B1System for continuous treatment

Publication Date: 2016.05.04 REIS DE CARVALHO RICARDO

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AI summary

The present invention patent deals with a system destined for continuous treatment of felts and screens in paper and cellulose machines, in a differentiated manner, and also the cleaning of other parts of the same machines at regular intervals, such as structures, tanks, hoods, floors, etc, utilizing applications of heated and pressurized chemical solution or homogenized enzymes (10, 11), which are applied in association or separately.