Electrostatic Particle Cleanup Assembly for Low-Backpressure Filtration
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Solution Overview
Problem
Current electrostatic precipitation and adsorption technologies for particulate matter removal suffer from low particle charging efficiency, leading to poor purification performance and high backpressure in particulate filters (DPFs), which increase engine fuel consumption and operating costs.
Innovation Solution
A gas particulate matter purification apparatus with a front discharge electrode assembly and an adsorption unit, where the discharge electrode assembly is connected to a DC high-voltage power supply, and the adsorption unit forms an electric field, with specific geometric configurations and power supply connections to enhance particle charging and adsorption efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DPFs are used to filter particulate matter, then particle removal is achieved, but backpressure increases significantly
Solution Approach 1:
The invention divides the particulate matter removal function into two segments: a front discharge electrode assembly that removes large particles through electrostatic precipitation, and a rear DPF that handles remaining fine particles. This segmentation allows the DPF to operate at lower backpressure since it only needs to filter smaller particle loads, while the front electrode assembly pre-filters larger particles that would otherwise contribute significantly to DPF backpressure.
Solution Approach 2:
The front discharge electrode assembly performs preliminary particle removal before the gas stream enters the DPF. By removing large particulate matter in advance, the DPF is protected from rapid clogging and operates more efficiently with lower backpressure throughout its service life.
2Reliability
If electrostatic precipitation is used for particle removal, then particle charging efficiency is improved, but device complexity increases
Solution Approach 1:
The invention merges the discharge electrode assembly with the DPF into a single integrated device. The discharge electrodes are positioned within the DPF housing, sharing the same gas flow path and structural space. This combination achieves effective particle charging and removal while avoiding the complexity of separate standalone electrostatic precipitation and DPF systems.
Solution Approach 2:
The DPF housing serves multiple functions: it contains the filtration media for fine particle capture and simultaneously houses the discharge electrode assembly for electrostatic precipitation. This multi-functionality reduces the number of separate components and simplifies the overall system architecture while maintaining high particle charging efficiency.
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 apparatus achieves high removal efficiency for particles, including viruses and bacteria, with over 99.99% removal of particles larger than 100 nm, reduces energy consumption, and extends the lifespan of DPFs by filtering large particles before DPF treatment, thereby lowering backpressure and costs.
Implementation Method 1
The discharge bundle comprises a plurality of metal wires and/or non-metal wires... The discharge bundle discharges to charge at least a part of particulate matter in the gas flowing through it
Implementation Method 2
The adsorption unit comprises at least one adsorption electrode and at least one discharge electrode for generating an adsorption electric field... particles in the gas combine with the charged ions and move toward and deposit on the electrodes with a polarity opposite to the charged ions
Data Source
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AI summary
The present invention discloses a gas particulate matter purification apparatus, a system, a mask system, and a table. The gas particulate matter purification apparatus for adsorbing and removing particulate matter from gas includes a front discharge electrode assembly and an adsorption unit. Ina gas flow direction, the front discharge electrode assembly is located in front of the adsorption unit and there is a distance between the front discharge electrode assembly and the adsorption unit. The front discharge electrode assembly includes at least one discharge bundle connected to a DC high-voltage power supply. The adsorption unit includes at least one adsorption electrode and at least one discharge electrode for generating an adsorption electric field. A gas flow channel is formed between the discharge electrode and the adsorption electrode to allow the gas to pass through and undergo the electric field treatment. The distance between the discharge electrode and the adsorption electrode that are adjacent to each other is the same. After the gas is purified by the gas particulate matter purification apparatus, the clean gas free of bacteria, radiation, and viruses can be obtained.