Wet-Grinding and Microwave Extraction of Noxious Raw Materials
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Solution Overview
Problem
Naturally-occurring raw materials, such as invasive, toxic, or poisonous plants, and petroleum/natural gas reservoir materials, contain noxious chemicals that hinder their conversion into useful products, necessitating effective extraction methods.
Innovation Solution
A system and method involving a wet-grinding apparatus with high torque motors and flat grinding disks, combined with microwave treatment, to process plant stocks and petroleum-based materials, converting them into useful products by releasing noxious chemicals and reducing particle size to micron levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional extraction methods are used on toxic plants, then the extraction process is simple, but the noxious chemicals cannot be effectively removed and the plant stock cannot be converted into useful products
Solution Approach 1:
The extraction process is divided into multiple sequential stages: (1) wet-grinding to reduce particle size to micron levels, (2) microwave irradiation to heat and rupture cells, (3) separation to divide the mixture into liquid fraction and solid residue, and (4) further processing of separated components. This segmentation enables effective removal of noxious chemicals while maintaining manageable process complexity at each stage.
Solution Approach 2:
The patent replaces conventional mechanical extraction methods with a combination of mechanical grinding followed by electromagnetic microwave irradiation. The microwave energy penetrates the ground plant material, heats the intracellular fluid, and causes cell rupture through thermal expansion, thereby releasing noxious chemicals more effectively than mechanical methods alone.
2Area of stationary object
If particle size is reduced to micron levels, then the surface area for chemical extraction increases, but the energy consumption for grinding increases
Solution Approach 1:
The wet-grinding process operates continuously with the plant stock slurry being fed through the grinding apparatus without interruption. The ground material proceeds directly to microwave irradiation and separation, eliminating idle time and ensuring that energy input at each stage continuously contributes to the overall extraction objective, thereby optimizing energy utilization despite the intensive grinding required.
Solution Approach 2:
The patent changes the physical state and properties of the plant material through controlled parameter adjustments: the slurry consistency is optimized for grinding, the particle size is reduced to specific micron ranges, and the microwave power and duration are adjusted to achieve optimal cell rupture while minimizing energy waste. These parameter optimizations balance the energy cost of size reduction with the extraction efficiency gained.
3Productivity
If microwave radiation is applied to the slurry, then the cell rupture and chemical release are enhanced, but the temperature control becomes more difficult
Solution Approach 1:
Before microwave irradiation, the plant stock is pre-ground to fine particle sizes in a wet state to create a uniform slurry. This preliminary mechanical size reduction ensures that when microwave energy is subsequently applied, the heat distributes more evenly throughout the material and the cell rupture occurs more uniformly, reducing hot spots and simplifying temperature control during the microwave heating phase.
Solution Approach 2:
The patent uses water as an intermediary medium in the wet-grinding process and during microwave irradiation. The water in the slurry acts as a heat transfer medium that absorbs microwave energy and distributes it uniformly throughout the plant material, preventing localized overheating and enabling better temperature control while still achieving effective cell rupture and chemical release.
4Adaptability or versatility
If the slurry is separated into liquid and solid fractions, then the useful products can be processed separately, but the separation process adds complexity
Solution Approach 1:
The separation process extracts and removes the solid fibrous residue from the liquid fraction containing the dissolved chemicals and noxious substances. This extraction of the solid phase simplifies subsequent processing of the liquid fraction, which can then be independently treated through evaporation, distillation, or other methods to isolate useful products, while the removed solid residue can be disposed of or utilized separately.
Solution Approach 2:
The separation process discards the solid fibrous residue that contains minimal value and potential contaminants, while recovering and concentrating the liquid fraction that contains the useful chemicals. This selective discarding and recovering approach simplifies the overall processing by eliminating the need to further treat the worthless solid material while focusing resources on processing the valuable liquid fraction.
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
Efficient extraction and conversion of noxious chemicals from plant stocks and petroleum materials into valuable products like pesticides, ethanol, and petroleum products, with minimal environmental impact.
Implementation Method 1
a set of flat grinding disks that are operably coupled to be driven by the motor drive and that are configured, when receiving power via the motor drive, to accept the slurry flow, to grind the suspended plant stock, and to discharge the slurry flow
Implementation Method 2
a microwave unit that includes at least a microwave emitter configured to emit microwave radiation toward the slurry
Data Source
AI summary
A system may be configured to extract useful products from raw materials. Some systems include (1) a wet-grinding apparatus that includes (a) a conveyance for receiving and directing a slurry containing carrier liquids with suspended raw materials, (b) a high torque motor, (c) a motor drive operably coupled to be driven by the high torque motor (d) a set of flat grinding disks that include at least one rotor disk that is operably coupled to be driven by the motor drive, the set configured, when the at least one rotor disk is driven by the motor drive, to accept the slurry from the conveyance, to grind the suspended raw materials, and to discharge the slurry, and (2) a microwave with a microwave emitter configured to emit microwave radiation toward the slurry at least one of before, while, or after the slurry is ground by the wet-grinding apparatus.