Enhanced Spiral Membrane Modules for High Organic Stream Filtration
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Solution Overview
Problem
Existing filtration systems using standard spiral membranes struggle with streams containing elevated organic levels, leading to rapid fouling, premature failure, and reduced membrane lifespan, necessitating costly pre-treatment and frequent cleaning.
Innovation Solution
The use of enhanced filter membrane modules, including plate and frame and spiral formats with optimized geometry and spacer configurations, allows for direct filtration of streams with elevated organic levels without pre-treatment, maintaining operational efficiency and extending membrane lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard spiral membranes are used for filtration, then the system structure is simple and cost-effective, but the membrane experiences rapid fouling and premature failure when treating streams with elevated organic levels
Solution Approach 1:
The patent applies local quality by optimizing specific geometric parameters of the spiral membrane module, including feed channel height (0.5-1.5mm), spiral wrap angle (30-60 degrees), and spacer configuration, to create localized flow conditions that reduce fouling while maintaining overall system simplicity
Solution Approach 2:
The patent changes physical parameters of the filtration system by adjusting feed channel dimensions, spiral geometry, and flow velocity (0.05-0.2 m/s) to optimize performance for high organic content streams, transforming the membrane module from a standard configuration to one tailored for foulant management
2Reliability
If pre-treatment is applied to reduce organic levels, then membrane fouling is reduced, but the device complexity and treatment cost increase
Solution Approach 1:
The patent enables the membrane system to self-manage organic fouling through optimized hydraulic conditions, where the spiral geometry and feed channel design automatically create flow patterns that prevent fouling accumulation without requiring external pre-treatment systems
Solution Approach 2:
The patent extracts the fouling management function from the pre-treatment stage and integrates it directly into the membrane module design, eliminating the need for separate pre-treatment equipment while maintaining membrane performance
3Productivity
If frequent cleaning is performed to maintain membrane performance, then membrane lifespan is reduced, but operational efficiency is maintained
Solution Approach 1:
The patent applies preliminary action by designing the spiral membrane geometry and feed channel configuration to prevent fouling accumulation before it reaches critical levels, creating flow conditions that continuously scour the membrane surface and maintain performance without intervention
4Object-affected harmful factors
If the feed channel height is increased to reduce fouling, then the open channel area increases improving flow, but the membrane packing density decreases
Solution Approach 1:
The patent optimizes the feed channel height parameter within a specific range (0.5-1.5mm) to balance two competing requirements: sufficient open channel area for foulant-free flow and adequate membrane packing density for compact system design
Solution Approach 2:
The patent combines multiple geometric parameters (feed channel height, spiral wrap angle, spacer material and configuration) to create a composite structural design that achieves both improved flow characteristics and maintained packing density
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
These systems achieve at least 30% recovery over an uninterrupted period, reducing fouling and extending membrane lifespan while managing higher organic levels, enabling treatment of streams with osmotic pressures up to 3000 Pa without the need for frequent cleaning or pre-treatment.
Implementation Method 1
selecting at least one filter membrane based on the determined organic osmotic pressure
Implementation Method 2
determining an organic osmotic pressure for a feed stream or a retentate stream, the organic osmotic pressure being at least 300 Pascal (Pa)
Data Source
AI summary
The present disclosure provides systems and methods that can treat feeds with elevated organic levels, e.g., feeds with ≥300 Pascals (Pa) organic osmotic pressure, with one or more enhanced filter membrane modules, which may be referred to herein as membrane modules or simply modules. Preferably, a filter membrane module consistent with the present disclosure include one or more plate and frame modules, one or more spiral format modules, or a combination of plate a frame and spiral format modules. The systems and methods provided herein can provide reliable performance when used to treat feeds with elevated organic levels.