Removable Filter Housing for Seawater Pre-Filtration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Desalination systems, particularly pre-filtration for reverse osmosis equipment, face challenges in selecting suitable wetted surface materials for seawater filtration, ensuring reliable operation, creating a reliable seal between input and output fluids, and enabling large fluid flows with minimal pressure drop, while requiring easy filter cartridge replacement for uptime efficiency.
Innovation Solution
A filter housing with a removable filter assembly featuring an elongated shell, a seal assembly with a ring and push-down mechanism, and baffle sheets to ensure sealing and efficient fluid flow, using melt blown polypropylene filter cartridges with a 20 micron rating, allowing for easy replacement and maintaining fluid isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a removable filter assembly is implemented to enable easy cartridge replacement, then ease of operation is improved, but device complexity increases due to additional sealing mechanisms and assembly components
Solution Approach 1:
The filter housing is divided into separable components including a removable filter assembly, head assembly, and shell assembly. This segmentation allows the filter cartridges to be easily removed and replaced while maintaining a relatively simple sealing structure through the use of gaskets positioned at critical interfaces rather than complex sealing mechanisms throughout the entire assembly.
Solution Approach 2:
Gaskets are used as intermediary sealing elements positioned between the filter assembly and the shell assembly, and between the head assembly and the shell assembly. These intermediary components provide reliable sealing without requiring complex sealing mechanisms, thus resolving the contradiction between ease of operation and device complexity.
2Reliability
If a reliable seal is created between input and output fluids to prevent contamination, then reliability is improved, but fluid flow is restricted and pressure drop increases
Solution Approach 1:
Sealing is applied locally at critical interfaces where fluid isolation is most important - specifically at the interface between the filter assembly and shell assembly, and between the head assembly and shell assembly. The gaskets are positioned to provide reliable sealing at these key locations without creating continuous restrictions throughout the entire fluid path, thus maintaining low pressure drop while ensuring reliability.
3Reliability
If wetted surface materials are selected for seawater filtration to ensure reliable operation, then reliability is improved, but manufacturing complexity increases due to material selection and compatibility requirements
Solution Approach 1:
The filter housing components (shell assembly, head assembly, filter assembly) are constructed from homogeneous materials - specifically thermoplastic materials that are compatible with seawater filtration requirements. This homogeneity in material selection simplifies manufacturing processes and ensures reliable operation with seawater, as the uniform material properties facilitate consistent performance and easier manufacturing compared to composite or heterogeneous material solutions.
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 provides a reliable and efficient filtration system that maintains fluid isolation, supports large fluid flows with minimal pressure drop, and allows for easy filter cartridge replacement, ensuring continuous operation and effective seawater filtration.
Implementation Method 1
A seal assembly on the filter assembly is configured for sealing engagement with a ring assembly on an interior perimeter of the shell assembly
Implementation Method 2
The push down assembly applies pressure to the filter assembly, which helps create the sealing engagement between the seal assembly and the ring assembly
Implementation Method 3
The filter cartridges preferably comprise melt blown polypropylene with a 20 micron rating
Implementation Method 4
The baffle sheets define baffle levels oriented generally transverse to the long axis of the shell assembly
Data Source
AI summary
The present invention is directed to a filter housing with a removable filter assembly having an elongated shell assembly, a removable head assembly, and a removable filter assembly. The shell assembly has an inlet section, an outlet section, and a filter assembly opening. The removable filter cartridge includes a top tube sheet, a bottom tube sheet and a plurality of filter cartridges. The filter cartridges provide the only fluid passage through the bottom tube sheet, which otherwise sealing engages a ring assembly within the shell assembly proximate to the outlet section.