Electrode Holder With Integrated Contact For Exhaust Gas Flow
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Solution Overview
Problem
Existing electrostatic precipitator systems for soot particle removal in vehicle exhausts face challenges in series operation due to fluctuating soot loads, mechanical loads, and the need for efficient regeneration, particularly in ensuring nitrogen dioxide contact with soot particles, and require simple, cost-effective components that can withstand varying conditions.
Innovation Solution
A holder for discharge electrodes with a flow-through body and integrated electrical contact allows precise alignment and independent power supply to multiple electrodes, enabling efficient corona discharge generation and particle charging, agglomeration, and separation with minimal pressure loss and turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple discharge electrodes are positioned in the exhaust pipe to enhance soot particle charging and separation efficiency, then the effectiveness of soot removal is improved, but the complexity of the system increases and the risk of electrical short circuits rises
Solution Approach 1:
The exhaust pipe is divided into multiple axial zones, each equipped with its own discharge electrode and collector electrode pair. This segmentation allows independent operation of each zone, enabling enhanced soot removal efficiency through distributed charging while maintaining simplified control and reducing electrical interference between electrodes.
Solution Approach 2:
Insulating structures are introduced as intermediary elements between adjacent discharge electrodes and between discharge electrodes and collector electrodes. These intermediaries prevent electrical short circuits while allowing the multiple electrodes to operate simultaneously, thus enabling improved soot removal without proportionally increasing system complexity.
2Ease of manufacture
If the electrode holder structure is simplified for cost-effective series production, then manufacturing cost and complexity are reduced, but the precision of electrode alignment in the exhaust gas flow may be compromised
Solution Approach 1:
The holder structure integrates multiple functions: mechanical support for electrodes, precise positioning features, electrical insulation, and flow management. By merging these functions into a single integrated component, manufacturing complexity is reduced while maintaining precise electrode alignment through built-in positioning features such as recesses and engagement elements.
Solution Approach 2:
The holder structure is designed as a universal component that can accommodate multiple discharge electrodes and collector electrodes while providing consistent positioning and insulation. This multi-functional design simplifies manufacturing by using a single standardized holder type throughout the system rather than requiring multiple specialized components.
3Reliability
If the holder structure provides robust electrical insulation and mechanical support to withstand varying exhaust conditions, then reliability is improved, but the pressure loss and turbulence in the exhaust gas flow may increase
Solution Approach 1:
The holder structure provides robust electrical insulation and mechanical support only at specific locations where electrodes are positioned, rather than creating a continuous solid barrier. This localized approach maintains reliability by ensuring proper insulation and support at critical points while minimizing interference with exhaust gas flow through strategically placed flow-through channels.
Solution Approach 2:
The holder structure incorporates flow-through channels that allow exhaust gas to pass through the holder body, reducing pressure loss and turbulence. The porous or channelled structure provides the necessary mechanical support and electrical insulation while maintaining smooth gas flow, thus improving reliability without significantly increasing energy loss.
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 holder enables precise electrode alignment and stable operation under changing conditions, enhancing soot particle charging, agglomeration, and separation efficiency, while allowing for continuous regeneration and reduced risk of electrical short circuits.
Implementation Method 1
the spray electrode being able to be operated, for example, with a high voltage that is in the range of approximately 15 kV. In this way, in particular, corona discharges can form, through which the particles flowing through the electric field with the exhaust gas are charged unipolarly
Implementation Method 2
the particles migrate to the collector electrode through the electrostatic Coulomb forces
Implementation Method 3
the flow-through body and the at least one electrical contact are each electrically segmented and electrically insulated from one another
Data Source
Figure 1~2
AI summary
Holder (1) for at least one electrode (2), in particular a discharge electrode which is suitable for producing a corona discharge, in an exhaust-gas line (3), wherein the holder (1) comprises a body (4), through which an exhaust gas can flow, and at least one electric contact (7) for the at least one electrode (2), wherein it is preferred that the at least one electric contact (7) is integrated into the body (4). In particular, an apparatus (15) for fixing at least one electric electrode (2) in an exhaust-gas line (3) is also proposed, which apparatus (15) has at least one holder (1) of this type, and in which apparatus (15) a particle separator (23) is arranged downstream in the flow direction (16) of the exhaust gas.