Membrane Filter Apparatus with Feed Distribution Tube
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Solution Overview
Problem
Existing membrane filtration systems face issues with uneven fluid velocity and pressure in the feed chamber, leading to inaccurate prediction of product fluxes and poor filtration performance, and are often large, cumbersome, and limited to a single filtration geometry, requiring expensive external pumps and specialized equipment for assembly and operation.
Innovation Solution
A compact membrane filter apparatus with a cylindrical body chamber and feed distribution tube that evenly distributes the feed across the filter surface, allowing for both cross-flow and dead-end filtration, and capable of handling hybrid and dialysis processes, featuring a filter assembly with a non-flexible support plate and gasket for secure assembly and efficient filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external hydraulic pumps or pneumatic clamping devices are used to control uneven feed fluid velocity and pressure, then filtration performance is improved, but device complexity and cost increase
Solution Approach 1:
The feed distribution tube is designed to automatically distribute feed fluid evenly across the membrane surface through its own geometry and flow dynamics, without requiring external pumps or clamping devices. The tube's length, orientation, and outlet configuration enable self-regulation of feed distribution.
Solution Approach 2:
The feed distribution tube serves multiple functions: it distributes feed fluid evenly, supports the membrane assembly, defines the feed chamber geometry, and facilitates easy assembly and disassembly. This multi-functionality eliminates the need for separate hydraulic or pneumatic components.
2Adaptability or versatility
If existing filtration systems are designed for single filtration geometry, then device complexity is reduced, but adaptability is limited
Solution Approach 1:
The apparatus is designed to perform multiple filtration geometries (cross-flow, dead-end, dialysis) using the same basic structure. By adjusting operational parameters and feed distribution, the system can adapt to different filtration modes without requiring separate dedicated devices.
Solution Approach 2:
The system allows dynamic switching between different filtration geometries by adjusting feed flow rate, pressure, and distribution patterns. The feed distribution tube and chamber geometry accommodate variable operational conditions for different filtration modes.
3Ease of operation
If existing filtration systems are made compact and portable, then ease of operation is improved, but manufacturing precision becomes more difficult
Solution Approach 1:
The apparatus is divided into modular components (feed distribution tube, membrane assembly, filtration chamber, collection chamber) that can be manufactured separately with standard precision and assembled together. This segmentation allows each component to be manufactured with achievable precision while maintaining overall system compactness.
Solution Approach 2:
The use of thin-walled chambers and flexible sealing elements (gaskets, membranes) enables compact design without requiring heavy-duty manufacturing. The thin-walled structure achieves the necessary precision through careful material selection and assembly techniques rather than complex manufacturing processes.
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 apparatus ensures even fluid distribution across the filter surface, improving filtration performance, reducing physical effort required for assembly, and enabling flexible operation across multiple filtration geometries, enhancing portability and efficiency.
Implementation Method 1
a feed may flow into the feed inlet, through the feed distribution tube, and out through the one or more feed outlet openings such that the feed flows across the filter in a direction substantially parallel to a surface of the filter assembly
Implementation Method 2
The membrane typically comprises pores of desired size and thereby acts as a filter element to remove the impurities or unwanted particles from the fluid
Implementation Method 3
Some amount of fluid permeates the membrane as a product fluid with almost zero contamination whereas the remaining fluid leaves as a fluid with impurities
Data Source
AI summary
A membrane filter apparatus for splitting a feed into filtrate and retentate is provided. The apparatus comprises a body chamber, a feed inlet disposed on the body chamber, a retentate outlet located in the body chamber, a feed distribution tube connected to the feed inlet, and a filter assembly having a filter. The feed distribution tube has a length sufficient to cause the feed to enter the body chamber at a feed distance from the filter assembly of no greater than 50% of a total length of the body chamber. The feed flows across the filter in a direction parallel to a surface of the filter assembly. The filtrate passes through the filter assembly and the retentate flows through the body chamber in a direction antiparallel to the feed flow through the feed distribution tube and out through the retentate outlet.