Pulse Group Electric Field for Waste Oil Demulsification Resonance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing demulsification and dehydration methods for waste lubricating oil using constant-frequency periodic and chaotic-frequency pulse electric fields fail to achieve high efficiency and low energy consumption due to incomplete resonance coverage and unstable droplet responses, respectively.
Innovation Solution
A demulsification-dehydration method utilizing a chaotic-frequency pulse group electric field with non-repetitive chaotic variation in pulse angular frequency, ensuring stable resonance for all droplet sizes through a sequence of pulse electric field groups with equal frequency, duty cycle, and intensity, enhancing agglomeration and dehydration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a constant-frequency periodic pulse electric field is used for demulsification, then the device structure is simple and energy consumption is low, but it can only make droplets of single particle size resonate, failing to achieve optimal resonance for all droplets
Solution Approach 1:
The patent applies dynamics by transitioning from a static constant-frequency electric field to a dynamic chaotic-frequency electric field. The frequency of the electric field varies chaotically over time according to the formula ω(t) = ω₀ + Δω·sin(2πft), allowing the field to adapt to different droplet sizes and achieve resonance across a broader spectrum of frequencies, thereby improving demulsification efficiency for multi-sized droplets.
Solution Approach 2:
The patent changes the frequency parameter of the electric field from constant to chaotically varying. By introducing time-dependent frequency modulation with specific amplitude Δω and frequency f, the electric field can match the natural resonance frequencies of droplets with different sizes, enabling more comprehensive droplet agglomeration and demulsification.
2Adaptability or versatility
If a chaotic-frequency pulse electric field with constant amplitude and equal pulse width is used, then it can cover resonant frequencies of all emulsified droplets, but it causes droplets to produce unsteady vibration and insufficient stable response at resonant frequency
Solution Approach 1:
The patent applies periodic action by superimposing a sinusoidal modulation on the chaotic frequency. The formula ω(t) = ω₀ + Δω·sin(2πft) combines the chaotic frequency variation with a periodic component, creating a structured pattern that allows droplets to experience repeated oscillations at resonant frequencies, thereby achieving both broad frequency coverage and stable resonant response.
Solution Approach 2:
The patent ensures continuous useful action by maintaining the electric field's presence throughout the demulsification process with a duty cycle of 0.2-0.8. This continuous application, combined with the chaotic-frequency modulation, ensures that droplets consistently experience resonant conditions, leading to stable and effective demulsification over time.
3Productivity
If sedimentation, chemical, centrifugal, electric field and vacuum methods are used for demulsification and dehydration, then various separation mechanisms are available, but high efficiency and low energy consumption cannot be achieved simultaneously
Solution Approach 1:
The patent utilizes mechanical vibration through the chaotic-frequency electric field to induce resonant oscillations in droplets. This vibration causes droplets to deform and agglomerate, accelerating the demulsification process. The resonant frequency matching amplifies the vibration effect with minimal energy input, achieving high efficiency while maintaining low energy consumption.
Solution Approach 2:
The patent exploits phase transitions in the form of droplet deformation and coalescence. The electric field induces phase changes in the droplet structure, causing them to transition from stable emulsion states to unstable states where they readily coalesce and separate. This phase transition mechanism enables efficient demulsification with low energy input.
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
The method achieves improved demulsification and dehydration efficiency by ensuring all droplets resonate at their optimal frequency, reducing energy consumption and enhancing droplet agglomeration, thereby improving the overall treatment process.
Implementation Method 1
under the optimal electric field frequency, the droplets will resonate, namely the deformation amplitude reaches the maximum without breaking, which increases the collision probability between droplets and realizes the efficient agglomeration and demulsification of the waste lubricating oil
Implementation Method 2
under the action of the pulse electric field, droplets in oil undergo vibration and deformation
Data Source
AI summary
A demulsification-dehydration method by using a chaotic-frequency pulse group electric field, including: subjecting a waste oil emulsion to the chaotic-frequency pulse group electric field for demulsification and dehydration. The chaotic-frequency pulse group electric field includes a plurality of pulse electric field groups varying in pulse angular frequency. The pulse angular frequency of each pulse electric field group varies chaotically within a preset range. Each pulse electric field group includes a plurality of pulses of equal frequency, duty cycle and electric field intensity.