Textile Waste Graphitization via Pyrolysis Sintering

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Solution Overview

Problem

Current methods lack effective processes for converting textile solid waste into graphite materials, which are suitable for applications such as batteries and conductive materials, while also reducing environmental impact by minimizing energy consumption and pollution.

Innovation Solution

A process involving the pyrolysis and sintering of textile solid waste under controlled temperature, pressure, and gas environments, without the use of catalysts, to produce graphite materials in various forms, including fibers and powders, from both natural and synthetic fibers, thereby reducing the need for virgin materials and minimizing environmental impact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If textile solid waste is converted into graphite materials through pyrolysis and sintering, then the quality of graphite materials is improved, but the energy consumption increases

Engineering Contradiction:

Improvequality of graphite materialsVSAvoidenergy consumption

Core Design Contradiction:

Manufacturing precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies parameter changes by optimizing the pyrolysis temperature (200-800°C) and sintering temperature (1000-3000°C) ranges, along with controlling heating rates, holding times, and atmospheric conditions to achieve high-quality graphite materials while minimizing energy consumption through precise parameter control

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces traditional mechanical grinding and processing methods with thermal field assistance (pyrolysis and sintering processes) to directly transform textile waste into graphite materials, reducing the need for extensive mechanical processing and associated energy consumption

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If textile solid waste is converted into graphite materials, then environmental pollution is reduced, but the process complexity increases

Engineering Contradiction:

Improveenvironmental pollutionVSAvoidprocess complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent converts the harmful factor of textile solid waste pollution into a beneficial graphite material resource through pyrolysis and sintering processes, transforming waste into valuable products for batteries and conductive materials while reducing environmental pollution

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent employs inert atmosphere control during pyrolysis and sintering processes to prevent unwanted chemical reactions and ensure high-quality graphite material production, managing process complexity through controlled atmospheric conditions

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

3Productivity

If catalysts are used in the conversion process, then the production efficiency is improved, but the manufacturing cost increases

Engineering Contradiction:

Improveproduction efficiencyVSAvoidmanufacturing cost

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent applies self-service by utilizing the inherent carbon content of textile solid waste as the primary material source, eliminating or minimizing the need for external catalysts and additional raw materials, thereby reducing manufacturing costs while maintaining production efficiency through self-sufficient material transformation

Inventive Principle:

Principle #25Self-service

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

This process effectively converts textile waste into high-quality graphite materials that can be used in various applications, such as Li-ion batteries and conductive materials, while reducing energy consumption and environmental pollution, and achieves comparable performance to commercial graphite products.

Implementation Method 1

The process includes pyrolysis and sintering of textile solid waste under a controlled temperature, pressure, and gas environment

Methodology Applied

Scientific EffectPyrolysis: Pyrolysis

Implementation Method 2

The process includes pyrolysis and sintering of textile solid waste under a controlled temperature, pressure, and gas environment

Methodology Applied

Scientific EffectSintering: Sintering

Data Source

PatentUS9181134B1Process of converting textile solid waste into graphite simple or complex shaped manufacture

Publication Date: 2015.11.10 ISRAZION

AI summary

This description concerns a process of converting textile solid waste into a graphite manufacture and makes it possible both to reduce or totally eliminate the use of virgin textile materials for graphitization and to prepare graphite manufacture, such as simple articles (e.g., fibers, powder, foil, sheets, etc.) and complex shape articles (e.g., blocks, plates, rings, pipes, armors, etc.). Described is a sustainable textile solid waste material management process.