Granular Filter Media Dust Collection with Local Exhaust
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Solution Overview
Problem
Current dust collection apparatuses in pharmaceutical facilities face challenges such as exposure risks during filter replacement, complex maintenance, large size, and poor washability due to the use of bag filters, and existing granular filter systems are not suitable for handling highly active pharmaceutical substances effectively.
Innovation Solution
A dust collection apparatus utilizing a package of granular or indefinite-shaped filter media with a simple structure, including an outer and inner tube, charge and discharge ports, and a suction duct system, allowing for efficient filtration and easy maintenance, reducing exposure risks and facilitating mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a bag filter is used in a dust collection apparatus, then filtration is achieved, but the apparatus becomes large in size and requires complex mechanisms for filter replacement and dust removal
Solution Approach 1:
The patent uses granular filter media with porous structure to replace the bag filter. The granular media is filled in a cylindrical filtering chamber and provides filtration through its porous nature, eliminating the need for complex bag filter replacement mechanisms while maintaining effective dust collection and exposure prevention
Solution Approach 2:
The patent extracts the dust removal function from the filtering mechanism by using a separate suction mechanism that draws dust-laden air through the granular filter media. This separation allows the filter media to remain in place while dust is continuously removed, eliminating the need for complex brush-off mechanisms and filter replacement procedures
2Ease of operation
If a bag filter dust collection apparatus is used, then dust collection is achieved, but the apparatus is large and heavy, reducing mobility
Solution Approach 1:
The granular filter media provides effective filtration in a compact cylindrical chamber, eliminating the need for large bag filters and complex support structures. This reduces the overall size and weight of the apparatus while maintaining reliable dust collection and exposure prevention capabilities
Solution Approach 2:
The patent uses a suction mechanism that creates negative pressure to draw dust-laden air through the granular filter media. This pneumatic approach enables effective dust collection in a compact design without requiring large mechanical components, thereby improving mobility while maintaining reliability
3Ease of manufacture
If a bag filter with brush-off mechanism is used, then dust removal is achieved, but the apparatus structure becomes complicated and washability is poor
Solution Approach 1:
The granular filter media in a simple cylindrical chamber provides filtration without requiring complex brush-off mechanisms. The entire apparatus has a simple structure with smooth surfaces that are easy to wash and sanitize, improving washability while reducing structural complexity
Solution Approach 2:
The dust removal function is extracted from the filter structure itself and implemented as a separate suction process. This eliminates the need for brush-off mechanisms and complex internal structures, resulting in a simple, easily washable apparatus while maintaining effective dust removal capability
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 minimizes exposure risks, is compact and lightweight, enables efficient filtration of highly active pharmaceutical substances, and allows for easy maintenance and washing, effectively preventing dust dispersion and secondary flying.
Implementation Method 1
a filter medium which is a package of a large number of filter media 21 each having a granular or indefinite shape
Implementation Method 2
exhaust gas is brought into contact with granular filter media while rotating a container packed with fine granules constituting the filter media
Data Source
Figure 1
Figure 2~2(c)
Figure 3
AI summary
A dust collection apparatus (100) includes: a housing (50); an outer tube (6) disposed inside the housing (50) and configured to allow a fluid to be filtered to pass therethrough; an inner tube (8) disposed inside the outer tube (6) and configured to allow the fluid to be filtered to pass therethrough; a large number of filter media (21) each having a granular or indefinite shape, the filter media (21) being packed in a packing space (20) formed between the outer tube (6) and the inner tube (8); an intake port (1a) for introducing the fluid to be filtered to the inside of the housing (50); an ejection port (5a) for ejecting the fluid filtered by making contact with the filter media (21); a charge port (1b) for charging and packing the filter media (21) into the packing space (20) from above; and a discharge port (10a) for discharging the filter media (21) packed in the packing space (20) downward.