Electrostatic Dust Separator With External Scraper Drives
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Solution Overview
Problem
Existing electrostatic dust collectors face issues with drive element degradation due to exposure to harmful atmospheres and high temperatures, limited purification efficiency due to two electrical precipitation fields, and complex drive technology that does not allow for individual frequency settings for multiple scraper devices.
Innovation Solution
The electrostatic dust collector features a cylindrical housing with scraper devices mounted outside the housing, driven by separate drive means through connecting elements, allowing independent control of each scraper device for enhanced purification efficiency and reduced thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drive elements are arranged directly inside the housing, then the scraper device can be driven, but the drive elements are exposed to harmful atmosphere and high temperatures which reduces service life and operational reliability
Solution Approach 1:
The drive elements (drive shaft and pinions) are extracted from the housing interior and relocated to the housing exterior. The drive shaft extends through the housing wall, with pinions positioned outside the housing to engage with the scraper device. This extraction removes the drive elements from the harmful high-temperature atmosphere inside the housing, thereby improving their operational reliability and service life while maintaining the driving function.
2Productivity
If only two electrical precipitation fields are provided, then the housing structure is simple, but the maximum achievable degree of purification of the flue gas is limited
Solution Approach 1:
The housing is segmented into multiple sections along its longitudinal axis, with each section containing an independent electrical precipitation field. The precipitation electrodes are divided into multiple sets, with each set serving a specific section. This segmentation allows for multiple precipitation fields to be implemented, thereby increasing the overall purification efficiency of the flue gas while maintaining a manageable structural complexity through modular design.
3Adaptability or versatility
If a shared drive shaft with pinions is used to drive multiple scraper devices, then the design is compact, but the drive technology becomes complex and failure-prone, and different frequency settings for each scraper device are not possible
Solution Approach 1:
The drive system is segmented into independent drive units, with each scraper device having its own dedicated drive shaft and pinion arrangement. Instead of a single shared drive shaft controlling multiple scrapers, each scraper device is equipped with separate drive elements that can be independently controlled. This segmentation enables different frequency settings for each scraper device while simplifying the overall drive mechanism and reducing points of failure.
Solution Approach 2:
Each scraper device is provided with locally optimized drive elements positioned at specific locations along the housing exterior. The drive shafts and pinions are arranged to provide localized driving action for each scraper device, allowing independent control and frequency adjustment for each unit. This local quality approach enhances adaptability while avoiding the complexity of a fully integrated shared drive system.
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 design ensures robust operation with reduced thermal stress on drive elements, allows for independent frequency settings, and achieves improved dust collection efficiency with continuous operation without interrupting the purification process.
Implementation Method 1
Within the housing, at least one precipitation field with precipitation electrodes and spray electrodes arranged between them is provided
Data Source
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AI summary
The invention relates to an electrostatic dust separator (10) for horizontal gas passages, comprising a cylindrical housing (12), within which at least one precipitation field (13) with precipitation electrodes (14) and spray electrodes (15) arranged therebetween is provided, at least one dust discharge opening (16), which is formed in the base region of the housing (12), at least one scraping device (17), which is arranged in the lower half of the cylindrical housing (12) and so as to adjoin the inner circumferential surface of the housing (12), wherein the scraping device (17) is rotatably mounted about a pivot axis (A1) which runs in the longitudinal direction of the housing (12), and drive means, by means of which the scraping device (17) can be pivoted back and forth about the pivot axis such that when the scraping device (17) is pivoted about the pivot axis, dust particles that have settled in the base region of the housing (12) are released by the scraping device (17) and can be successively introduced into the dust discharge opening (16). The drive means are arranged outside of the housing (12) and interact with the scraping device (17) via at least one paired connection element.