Electric precipitator air pollution control device
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Solution Overview
Problem
Existing electrostatic precipitators (ESPs) face challenges in efficiently capturing small particulates at high airflow rates in kitchen environments, particularly during meat char broiling, due to turbulence and arcing issues, which reduce collection efficiency and increase the risk of particles going uncharged or uncollected.
Innovation Solution
The design incorporates multiple ionizing sections with separate power supplies to maintain consistent charging, collector plates spaced to ensure laminar flow and prevent arcing, and a cleaning system to efficiently remove collected particulates, along with features like a perforated metal shield and droplet injection to enhance particle collection and airflow management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If airflow rate is increased to handle high cooking emissions, then productivity improves, but turbulence increases causing arcing and reducing collection efficiency
Solution Approach 1:
The precipitator is divided into multiple independent channels, each with its own ionizing members and collector plates. This segmentation allows each channel to operate at lower, more stable airflow rates that maintain laminar flow conditions, preventing arcing while collectively handling high total airflow volumes for improved productivity.
2Reliability
If collector plates are placed closer together to increase collection area, then particle collection efficiency improves, but arcing between plates increases
Solution Approach 1:
By dividing the precipitator into multiple channels with fewer plates per channel, the electrical stress between adjacent plates is reduced. This allows plates to be positioned closer together within each channel to maintain collection efficiency while the segmented structure prevents arcing that would occur in a single high-density plate arrangement.
3Device complexity
If single power supply is used to simplify system, then device complexity decreases, but charging consistency deteriorates due to voltage drops during operation
Solution Approach 1:
Each channel is equipped with its own dedicated power supply unit, isolating the electrical systems. This ensures that voltage drops or fluctuations in one channel do not affect other channels, maintaining consistent charging of particles across all channels regardless of overall system load or operational conditions.
4Volume of moving object
If compact design is implemented to fit tight kitchen spaces, then installation ease improves, but airflow management becomes more difficult reducing collection efficiency
Solution Approach 1:
The multiple channel configuration allows the precipitator to achieve a compact footprint by arranging channels in parallel rather than requiring a single large volume. This dimensional arrangement maintains adequate airflow paths and plate spacing within each channel for efficient particle collection while fitting into restricted kitchen installation spaces.
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 configuration improves the collection efficiency of small particulates, reduces arcing, and ensures consistent charging, leading to higher removal rates of particulate matter even at higher airflow velocities, while also being compact enough for tight kitchen spaces.
Implementation Method 1
imparting an electric charge to a particle and then exploiting that now charged particle's attraction and/or repulsion to an electrostatic field
Implementation Method 2
electrostatic deposition onto alternatively charged plates
Data Source
AI summary
An electrostatic air precipitator for emission remediation including, a grounded frame connected to a housing having an upstream direction and a downstream direction with a first ionizing section, having at least a first set of ionizing members and a second set of ionizing members, where the ionizing members of the first set and the second set are electrically isolated from each other and electrically isolated from the grounded frame. Also, the ionizing members of the first set and the ionizing members of the second set are powered by separate power supplies and at least a first collector section is located downstream of the first ionizing section, and the first collector section has at least a first plurality of collector plates.