Particle Screen Reducing Agent Delivery Device
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Solution Overview
Problem
Existing devices for providing liquid reducing agents, such as those used in exhaust-gas treatment systems for internal combustion engines, face challenges including high costs, blockages due to impurities, and the need for frequent filter replacements, which are expensive and difficult to access.
Innovation Solution
A device featuring a tank with a vessel surrounded by a particle screen that allows the reducing agent to flow through, using a delivery unit to transfer the agent to an injector, where the particle screen acts as a blockade for impurities, preventing blockages and maintaining a self-cleaning mechanism, thus providing a cost-effective and space-saving solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filters are used to filter the reducing agent, then impurities are removed, but the filters become blocked during operation and require frequent replacement
Solution Approach 1:
The filter is divided into multiple filtering elements arranged in parallel, where each element handles a portion of the flow. This segmentation prevents any single element from becoming completely blocked, maintaining continuous operation even when some elements are saturated with impurities.
Solution Approach 2:
The filter design allows for easy removal and replacement of filtering elements without draining the tank or disassembling the entire device. Used filters can be discarded and new ones installed quickly, minimizing operational interruption and maintenance complexity.
2Reliability
If conventional filters are used to filter the reducing agent, then impurities are removed, but the device complexity and cost increase
Solution Approach 1:
The filter consists of multiple simple cylindrical filtering elements that can be individually manufactured and assembled. This modular segmentation simplifies the overall system architecture, making it easier to manufacture, assemble, and maintain compared to complex integrated filter systems.
Solution Approach 2:
The filter elements are designed as disposable components that can be easily removed and replaced without special tools or complex procedures. This reduces the need for sophisticated maintenance equipment and trained personnel, thereby reducing overall system complexity and operational costs.
3Reliability
If conventional filters are used to filter the reducing agent, then impurities are removed, but the space required and accessibility for maintenance worsen
Solution Approach 1:
The filter elements are positioned in the tank such that they can be accessed and removed from the top opening without draining the reducing agent or disassembling other components. This top-access design greatly improves ease of maintenance compared to filters embedded in the tank walls or bottom.
Solution Approach 2:
The multiple cylindrical filtering elements are arranged vertically or radially within the tank, occupying minimal space while providing sufficient filtration capacity. This compact segmented arrangement leaves adequate space for easy access and removal during maintenance operations.
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 device effectively filters impurities, reducing the risk of blockages and maintaining operational efficiency with minimal maintenance, providing a cost-effective and permanently ready-to-operate solution for delivering purified reducing agents to exhaust systems.
Implementation Method 1
a particle screen through which a flow can pass... through the particle screen through which the reducing agent can flow
Data Source
AI summary
A device for providing a liquid reducing agent includes a tank having an interior space, a vessel at least partly disposed in the inner space of the tank, the vessel being at least partly surrounded by a particle screen through which a liquid can flow, and a delivery unit located in the vessel and configured for delivering reducing agent from the tank, through the particle screen and then out to a take-off or delivery point for reducing agent.