Capped Carbon Filter Assembly Resolving Weight and Disposal Contradictions
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Solution Overview
Problem
Existing activated carbon filters used in natural gas purification processes become saturated and heavy, making them difficult and dangerous to handle, and their disposal in landfills is environmentally undesirable due to the use of steel canisters.
Innovation Solution
A carbon filter design featuring a carbon-based core with a polymer-based filter material and end caps, eliminating metal usage and minimizing channeling, allowing for longer filter life and incineration at the end of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a steel filter canister is used to contain activated carbon, then the filter structure is strong and durable, but the filter becomes too heavy to handle safely when saturated
Solution Approach 1:
The patent changes the material parameters of the filter canister from steel to a composite structure consisting of a plastic canister with a foam core. This parameter change reduces the density and weight of the canister while maintaining structural integrity through the foam core reinforcement, thereby resolving the contradiction between strength and weight.
Solution Approach 2:
The patent employs composite materials by combining plastic (for the canister body) with foam core (for structural reinforcement). This composite structure provides sufficient mechanical strength to contain activated carbon while significantly reducing the overall weight compared to a solid steel canister, thus resolving the strength-weight contradiction.
2Reliability
If activated carbon is used in a steel filter canister, then the filter effectively removes impurities, but the saturated filter cannot be disposed of through incineration
Solution Approach 1:
The patent changes the material composition parameters of the filter canister from metal (steel) to organic materials (plastic and foam). This parameter change makes the entire filter assembly compatible with incineration disposal, allowing the saturated filter to be thermally treated along with the activated carbon, thereby resolving the contradiction between filtration effectiveness and disposal capability.
Solution Approach 2:
The patent adopts a disposable filter design where the entire filter assembly (canister, foam core, and activated carbon) is designed for single-use and incineration disposal. The plastic and foam materials are selected to be compatible with incineration processes, enabling economical and environmentally acceptable disposal of saturated filters, thus resolving the contradiction between reliability and ease of manufacture/disposal.
3Strength
If a heavy steel filter canister is used, then the filter maintains structural integrity, but handling becomes difficult and dangerous
Solution Approach 1:
The patent changes the density parameter of the canister material from steel (high density) to plastic with foam core (low density). This parameter change reduces the weight by a significant factor while the foam core maintains structural integrity through its cellular structure that provides rigidity and strength-to-weight ratio, thereby resolving the contradiction between structural integrity and handling ease.
Solution Approach 2:
The patent uses composite materials (plastic canister with foam core) where the foam provides structural support with minimal weight. This composite construction maintains the necessary structural integrity to contain activated carbon under operating conditions while reducing the weight to manageable levels, thus resolving the contradiction between structural integrity and handling ease.
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 improved carbon filter design extends the useful life of the filter, reduces handling hazards, and enables environmentally friendly disposal through incineration, addressing the issues of saturation and disposal challenges of traditional filters.
Implementation Method 1
the activated carbon used in amine and glycol filtration typically is provided in a heavy steel filter canister. During use, the activated carbon become saturated
Data Source
AI summary
A carbon filter is disclosed. Such a carbon filter includes a carbon-based core having a central cavity, a layer of a polymer-based filter material surrounding the carbon-based core, and at least one end cap fixedly attached to the carbon-based core.