Frozen Surface Particulate Capture Device for High-Humidity Aerosols
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for removing fine particulate matter, especially sub-micron particles, from high-humidity aerosols are inefficient and face challenges with equipment corrosion and high operational costs, particularly in industrial settings where the removal of PM2.5 and PM1 is critical for air quality and health reasons.
Innovation Solution
A system and method involving a fine particulate matter capture device with parallel sheet members and an interferent to create a turbulent flow, forming a water film on the sheet members, which utilizes thermophoretic and vapor pressure gradient forces to settle and remove fine particulate matter, enhanced by a finned tube heat exchanger or semiconductor thermoelectric sheets for effective particulate capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional wet dust collectors are used to remove fine particulate matter from high-humidity aerosols, then coarse particulate matter can be removed, but fine particulate matter removal efficiency is poor
Solution Approach 1:
The patent changes the physical parameters of the collection surface by maintaining it in a frozen state (low temperature) rather than using conventional liquid-based collection. This parameter change enables effective capture of fine particulate matter through phase difference and thermal effects, achieving high removal efficiency for PM2.5 and sub-micron particles from high-humidity aerosols
Solution Approach 2:
The patent replaces the conventional mechanical inertial collision mechanism with a thermal-mechanical mechanism involving frozen surfaces. The frozen collection surface utilizes thermal conduction and phase change properties to capture particles, substituting the traditional mechanical wet collection approach that fails for fine particles
2Productivity
If bag-type dust removal technology is applied to high-humidity aerosols, then dust removal efficiency is improved, but the dust layer hardens after absorbing water affecting continuous operation
Solution Approach 1:
The patent replaces the fabric bag mechanical filtration system with a frozen surface condensation and adhesion system. The frozen surface prevents dust layer hardening by maintaining a solid-state collection mechanism that doesn't absorb water like fabric bags, enabling continuous operation with high-humidity aerosols
Solution Approach 2:
The patent changes the collection surface temperature parameter to sub-zero levels, maintaining it in a frozen state. This parameter change prevents the dust layer from absorbing water and hardening, allowing continuous operation without the limitations of bag-type filters in high-humidity environments
3Productivity
If wet electric dust removal technique is used, then removal efficiency by mass concentration reaches about 70%, but efficiency by number concentration of removing sub-micron particles is low and equipment corrosion occurs frequently
Solution Approach 1:
The patent uses a frozen collection surface that can be easily regenerated by melting and refreezing, replacing the need for expensive corrosion-resistant materials and complex electrostatic equipment. The simple frozen surface approach achieves effective particle removal without suffering from equipment corrosion issues
Solution Approach 2:
The patent replaces the electrostatic field-based wet electric dust removal system with a thermal-field-based frozen surface collection system. This substitution eliminates the charging mechanism limitations for sub-micron particles and avoids equipment corrosion while maintaining high removal efficiency
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 solution achieves high efficiency in removing fine particulate matter by leveraging turbulent flow, thermophoretic, and vapor pressure gradient forces, forming a water film to trap particles, thereby improving air quality and reducing operational costs and equipment corrosion in industrial applications.
Implementation Method 1
passages being formed between adjacent sheet members to cause the aerosol to form a turbulent flow between the passages
Implementation Method 2
forming a water film on outer surfaces of the sheet members; thereby causing the fine particulate matter to settle on the outer surfaces of the sheet members and to be removed by flowing of the water film
Implementation Method 3
an interferent between the sheet members, the sheet members being substantially parallel to each other and substantially parallel to the flowing direction of the aerosol, and passages being formed between adjacent sheet members to cause the aerosol to form a turbulent flow between the passages
Data Source
AI summary
A system for removing fine particulate matter from an aerosol, which, using a fine particulate matter capture device (1) comprising sheet members (2) parallel to each other and an interferent (3) between the sheet members, causes the aerosol to form a turbulent flow in passages between the sheet members (2), settles fine particulate matter in the aerosol on the outer surfaces of the sheet members under the action of turbulent fluctuation, thermophoretic force and/or vapor pressure gradient force, and meanwhile forms a water film on the outer surfaces of the sheet members (2) to prevent settled particulate matter from being carried away again by an air flow. The system is able to effectively remove fine particulate matter from an aerosol, especially sub-micron particulate matter, and significantly reduce the number concentration thereof.