Bast-Fiber Processing via Hydrodynamic Segmentation
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Solution Overview
Problem
Existing methods for processing bast-fibre materials, such as flax and hemp, face inefficiencies in energy consumption and quality due to the direct use of electrohydraulic or electropulsed discharges, which lead to excessive energy expenditure and poor fibre separation, particularly in the initial destruction phases and subsequent cottonizing processes.
Innovation Solution
The method involves a two-stage hydrodynamic processing approach, using a continuous mode with ultrasound and a pulsed mode with shock wave impacts, differing in pressure amplitudes and durations, along with UHF radiation preprocessing to effectively separate and cleanse fibres, optimizing energy use and fibre integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct electrohydraulic method is used for cottonizing, then processing can be performed, but energy consumption increases and efficiency decreases
Solution Approach 1:
The processing is divided into two distinct stages: preliminary hydrodynamic processing to destroy the ligneous structure and separate fibres, followed by electrohydraulic processing for final cottonizing. This segmentation allows each method to be optimized for its specific function, reducing overall energy consumption while improving efficiency.
Solution Approach 2:
The preliminary hydrodynamic processing stage performs the energy-intensive destruction of the stem structure and fibre separation before the electrohydraulic stage. This preliminary action prepares the material so that the subsequent electrohydraulic processing requires less energy and can focus on the cottonizing function.
2Manufacturing precision
If hydrodynamic shock-wave impact is used to destroy stem structure, then fibre separation is achieved, but excessive energy is spent on non-fibre parts
Solution Approach 1:
The processing is divided into two distinct stages: preliminary hydrodynamic processing to destroy the ligneous structure and separate fibres, followed by electrohydraulic processing for final cottonizing. This segmentation allows each method to be optimized for its specific function, reducing overall energy consumption while improving efficiency.
Solution Approach 2:
The hydrodynamic shock wave, which initially appears to waste energy on destroying non-fibre parts, is actually beneficial as it effectively separates fibres from the stem structure. The patent converts this apparent energy waste into a useful preliminary processing step that prepares the material for more efficient final cottonizing.
3Device complexity
If single-mode electrohydraulic processing is used, then processing is simplified, but quality and energy efficiency are compromised
Solution Approach 1:
The processing is divided into two distinct stages: preliminary hydrodynamic processing to destroy the ligneous structure and separate fibres, followed by electrohydraulic processing for final cottonizing. This segmentation allows each method to be optimized for its specific function, reducing overall energy consumption while improving efficiency.
Solution Approach 2:
The patent employs two different processing modes with distinct parameters: continuous hydrodynamic wave field with specific pressure and duration characteristics, followed by pulsed electrohydraulic discharge with different pressure amplitudes. This parameter differentiation enables optimal processing for each stage, improving cottonine quality.
4Manufacturing precision
If increased number of electropulse discharges is used, then cottonizing is achieved, but processing time and energy consumption increase
Solution Approach 1:
The preliminary hydrodynamic processing stage performs the energy-intensive destruction of the stem structure and fibre separation before the electrohydraulic stage. This preliminary action prepares the material so that the subsequent electrohydraulic processing requires fewer discharges and less time to achieve complete cottonizing.
Solution Approach 2:
The hydrodynamic processing is performed in continuous mode, providing continuous useful action on the fibre material. This continuous processing complements the pulsed electrohydraulic stage, reducing the total number of pulses needed and thereby decreasing processing time.
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 energy consumption while enhancing processing efficiency and productivity, resulting in higher-quality cottonine with improved fibre separation and reduced energy expenditure.
Implementation Method 1
The hydrodynamic processing in the continuous mode can be performed using an ultrasound source
Implementation Method 2
in the pulsed mode it can be performed using a source of electropulse discharge in liquid
Implementation Method 3
by the impact of a hydrodynamic wave field, and then in a pulsed mode by a shock wave impact
Implementation Method 4
between loosening the material and placing it in the aqueous medium the material can be processed with UHF radiation
Data Source
Figure 1
AI summary
The invention relates to a method for processing bast-fibre materials involving loosening a material, placing said material in an aqueous medium, hydrodynamically processing material successively in two modes: first, in a continuous mode by performing a hydrodynamic wave field action, and then in a pulsed mode by performing a shock-wave action, wherein the pressure amplitude of the positive wave phase in the continuous mode is less than the pressure amplitude of the positive wave phase in the pulsed mode, and removing the material from the aqueous medium. The invention makes it possible to produce a high quality cottonine, the linear density of which is equal to or less than 0.3 Tex with the optimal energy consumption of the production process.