Activated Carbon Adsorption Filter Pore Control for Water Permeability
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Solution Overview
Problem
Existing adsorption filters using activated carbon struggle to effectively remove ultrafine particles while maintaining good water permeability, as wet molded bodies have low density and low water flow resistance, and dry molded bodies have high density and increased water flow resistance, making them unsuitable for water purification applications.
Innovation Solution
The adsorption filter is designed with specific pore volumes and pore diameters, ranging from 0.10 cm3/cc to 0.39 cm3/cc for pores ≥10 μm and 0.15 cm3/cc to 0.73 cm3/cc for total pores, achieved by controlling the physical properties and blending ratios of activated carbon and binder, ensuring both ultrafine particle removal and good water permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wet molded body is used, then water flow resistance is low, but ultrafine particle removal performance is poor
Solution Approach 1:
The invention changes the physical parameters of the molded body by controlling the pore volume of large pores (10 μm or more) to 0.10 cm³/cc to 0.39 cm³/cc. This parameter adjustment allows the filter to achieve both low water flow resistance and excellent ultrafine particle removal performance, resolving the contradiction between ease of operation and reliability.
2Quantity of substance
If a dry molded body is used, then density is high, but water flow resistance increases
Solution Approach 1:
The invention optimizes the pore volume parameters to achieve a balanced density that provides both high ultrafine particle removal performance and low water flow resistance. By controlling the pore volume of large pores within the specific range, the filter maintains appropriate density without excessive water flow resistance.
3Ease of operation
If pore volume of large pores is increased, then water permeability improves, but ultrafine particle removal performance deteriorates
Solution Approach 1:
The invention identifies and controls the critical parameter of pore volume for large pores (10 μm or more) within the optimal range of 0.10 cm³/cc to 0.39 cm³/cc. This precise parameter control enables the filter to achieve both high water permeability and excellent ultrafine particle removal performance, resolving the contradiction between these two opposing requirements.
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 filter achieves excellent ultrafine particle removal performance while maintaining favorable water permeability, suitable for water purification applications, by optimizing pore volumes and densities through controlled production methods.
Implementation Method 1
an adsorption filter comprising a molded body containing activated carbon and a binder, wherein a pore volume of pores having a pore diameter of 10 μm or more on a volume basis of the adsorption filter is 0.10 cm3/cc to 0.39 cm3/cc
Implementation Method 2
an adsorption filter comprising a molded body containing activated carbon and a binder
Data Source
AI summary
The adsorption filter according to the present invention is formed from a molded body including activated carbon and a binder, the pore volume of pores having a diameter of 10 μm or greater in terms of the volume of the adsorption filter as measured through mercury intrusion being 0.10 cm3/cc to 0.39 cm3/cc.