System for anhydrous boiling, bleaching and dyeing using supercritical carbon dioxide fluid
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Solution Overview
Problem
The jute fiber boiling and bleaching process in the textile industry faces challenges with high contamination and energy consumption, as well as environmental pollution due to the use of water-based methods, which are inefficient and costly.
Innovation Solution
A system for anhydrous boiling, bleaching, and dyeing using supercritical carbon dioxide fluid replaces traditional water-based methods, integrating the processes into a single step with a system comprising a carbon dioxide storage, ultrasonic atomizer, booster pump, heater, dye vessel, and separation system, utilizing a co-solvent and bio-enzyme agents to enhance the efficiency and reduce environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional water-based boiling and bleaching processes are used, then fiber purification is achieved, but water consumption and energy consumption increase significantly
Solution Approach 1:
The patent changes the physical state and chemical properties of the processing medium from liquid water to supercritical carbon dioxide by adjusting temperature and pressure parameters. The supercritical fluid achieves both purification function and reduced consumption by operating in a state where it has both liquid-like density and gas-like diffusivity, eliminating the need for large volumes of water while reducing energy required for heating and drying
Solution Approach 2:
The patent utilizes the phase transition characteristics of carbon dioxide between supercritical and gaseous states. By controlling pressure and temperature, the CO2 transitions to a supercritical state for processing, then returns to gaseous state for easy separation and recycling, eliminating water consumption and associated energy costs for water removal and drying
2Manufacturing precision
If traditional water-based bleaching with chemical agents is used, then white degree of fiber is improved, but environmental pollution increases due to chemical waste
Solution Approach 1:
The patent uses supercritical carbon dioxide as an inert processing medium that does not leave harmful residues. The CO2 system provides a clean environment for bleaching that eliminates the chemical waste and pollution associated with traditional water-based chemical bleaching processes, while still achieving the required white degree through controlled oxidation reactions
Solution Approach 2:
The patent introduces co-solvents and bio-enzyme agents as intermediaries that enhance the bleaching effectiveness of supercritical CO2. These intermediaries facilitate the removal of impurities and achieve high white degree while being environmentally benign, replacing harsh chemical agents and eliminating their associated pollution problems
3Productivity
If multiple separate processes (boiling, bleaching, dyeing) are used, then comprehensive fiber treatment is achieved, but process complexity and time increase
Solution Approach 1:
The patent merges boiling, bleaching, and dyeing processes into a single integrated supercritical fluid treatment step. By conducting all three operations simultaneously in the supercritical CO2 medium, the system achieves comprehensive fiber treatment while reducing process complexity and increasing productivity, eliminating the need for multiple separate processing stages
Solution Approach 2:
The supercritical carbon dioxide system serves multiple functions simultaneously: it acts as a heating medium for boiling, an oxidizing environment for bleaching, and a solvent for dyeing. This multi-functionality allows a single process to achieve what traditionally required multiple separate operations, simplifying the overall process while maintaining comprehensive fiber treatment
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 approach significantly reduces contamination and energy consumption, achieving high-efficiency boiling, bleaching, and dyeing of jute fibers while minimizing environmental pollution, with improved fiber quality and process efficiency.
Implementation Method 1
an ultrasonic atomizer for receiving the carbon dioxide from the carbon dioxide storage system and the co-solvent from the co-solvent tank, wherein the co-solvent is atomized in the ultrasonic atomizer and then mixed with the carbon dioxide to form a mixed fluid
Implementation Method 2
the mixed fluid of the carbon dioxide and the co-solvent enables the mixed fluid to become a supercritical carbon dioxide fluid dissolved with the co-solvent after being pressurized by the booster pump and heated by the heater
Implementation Method 3
after being pressurized by the booster pump and heated by the heater
Implementation Method 4
after being pressurized by the booster pump and heated by the heater
Implementation Method 5
The supercritical fluid extraction technology enables the supercritical fluid to be contacted with the separated substance by the relation between the dissolving capacity and the density of the supercritical fluid under the condition that the chemical composition is not changed
Implementation Method 6
the supercritical fluid has great application value. Since Essen of West Germany held the first international conference 'Supercritical Fluid Extraction' in 1978
Implementation Method 7
a separation system for receiving the materials from the boiling, bleaching and dyeing kettle, wherein the separation system can conduct gas-solid separation to the materials
Data Source
AI summary
An system for anhydrous boiling, bleaching and dyeing using a supercritical carbon dioxide fluid and belongs to the field of textile. The system for anhydrous boiling, bleaching and dyeing of a supercritical carbon dioxide fluid provided by the present invention is provided with a co-solvent system, a boiling, bleaching and dyeing system, and a separation and recovery system which are specially designed. By means of uniform dispersion and dissolution of a co-solvent, dyestuff and carbon dioxide, boiling, bleaching and dyeing production of jute fiber rough yarn can be achieved; meanwhile, the system for anhydrous boiling, bleaching and dyeing using a supercritical carbon dioxide fluid integrates the three functions of boiling, bleaching and dyeing, which can complete the boiling, bleaching and dyeing procedures in one step, and has the characteristic of high-efficiency, thus solving the problems of high contamination and high energy consumption of the jute fiber boiling, bleaching and dyeing procedures.