Liquid Additive Extraction Filter Cake Formation
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Solution Overview
Problem
The existing methods for extracting liquid additives from tanks in automotive exhaust-gas treatment devices often result in contamination, which damages delivery and dosing devices and requires frequent maintenance due to the formation of crystalline deposits and abrasive contaminants.
Innovation Solution
A method involving a porous filter that separates contaminants from the liquid additive, forming a filter cake on its surface, allowing the additive to be extracted while maintaining the filter's functionality without regular cleaning, using a device with a cylindrical housing and a filter with a chaotic pore system that prevents blockage and allows continuous extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter device is used to purify the liquid additive, then contaminants are removed from the liquid additive, but the filter device becomes contaminated and blocked by contaminants requiring regular maintenance
Solution Approach 1:
The patent converts the harmful contaminants into a beneficial filter cake layer that performs the filtration function. Instead of viewing contaminants as merely harmful substances to be removed, the system allows them to form a porous cake on the filter surface that acts as an effective filtering medium, thereby transforming the problem of contamination into a solution for purification while eliminating the need for filter cleaning
Solution Approach 2:
The filter system becomes self-maintaining through the automatic formation of the filter cake. The contaminants themselves create the filtering layer without external intervention, and the system continuously purifies the liquid additive without requiring manual cleaning or maintenance of the filter device
2Manufacturing precision
If a filter is used to remove contaminants, then the liquid additive is purified, but the filter requires regular cleaning and maintenance
Solution Approach 1:
The patent transforms contaminants from harmful substances requiring filter cleaning into a beneficial porous filter cake that performs the filtration function. The filter cake formed on the filter surface maintains high purification effectiveness while eliminating the need for filter device cleaning and maintenance
Solution Approach 2:
The filter cake formed from contaminants possesses a porous structure that enables effective filtration while maintaining permeability to the liquid additive. This porous configuration allows the filter cake to function as a self-sustaining filtering medium that does not require mechanical cleaning
3Productivity
If contaminants are present in the liquid additive, then the liquid additive can be extracted, but contaminants damage delivery and dosing devices through blocking and abrasion
Solution Approach 1:
The patent performs preliminary filtration by forming a filter cake that captures contaminants before the liquid additive reaches the delivery and dosing devices. This pre-cleaning action prevents contaminants from causing blocking or abrasive damage to downstream components while maintaining continuous extraction capability
Solution Approach 2:
The filter cake acts as an intermediary barrier between the contaminated liquid additive in the tank and the sensitive delivery/dosing devices. It selectively retains contaminants while allowing the liquid additive to pass through, thereby protecting downstream equipment from damage
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
This method effectively purifies the liquid additive by retaining contaminants on the filter surface, reducing maintenance needs and preventing filter blockage, ensuring continuous operation with minimal maintenance requirements.
Implementation Method 1
filtration of the liquid additive by a filter which covers the extraction point and which separates the latter from the interior space of the tank and through which the liquid additive flows, wherein contaminants of the liquid additive are deposited on a surface of the filter
Implementation Method 2
formation of at least one porous filter cake from contaminants of the liquid additive on the surface of the filter
Implementation Method 3
formation of at least one porous filter cake from contaminants of the liquid additive on the surface of the filter
Implementation Method 4
filtration of the liquid additive by the at least one porous filter cake, wherein contaminants of the liquid additive are deposited in the filter cake
Data Source
AI summary
A method for extracting a liquid additive from an interior space of a tank at an extraction point includes: filtering the liquid additive by at least one filter that covers the extraction point and that is configured to separate the extraction point from the interior space of the tank and through which the liquid additive flows, wherein contaminants of the liquid additive are deposited on a surface of the filter, and extracting the liquid additive from the tank at the extraction point; forming at least one porous filter cake from contaminants of the liquid additive on the surface of the filter; and filtering the liquid additive by the at least one porous filter cake, wherein contaminants of the liquid additive are deposited in the filter cake, and extracting the liquid additive from the tank at the extraction point.