Cyclone Vortex Finder Secondary Powder Extraction
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Solution Overview
Problem
Current powder drying systems face limitations in efficiently separating dried powder particles from air/gas mixtures, with cyclones extracting larger particles but struggling with smaller ones, and bag filters consuming high energy and requiring extensive cleaning, while also being unsuitable for pharmaceutical applications due to fiber contamination risks.
Innovation Solution
A cyclone with a secondary powder extraction system integrated into the vortex finder, featuring a tangential outlet to capture powder particles near the vortex finder walls, reducing system size and energy consumption by recirculating particles and using a venturi duct for efficient particle redirection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If cyclones are used to separate dried powder particles from air/gas, then energy consumption is low and larger particles are extracted, but smaller particles cannot be effectively extracted
Solution Approach 1:
The cyclone system is segmented into multiple extraction points: a primary powder outlet at the bottom for larger particles and a secondary powder outlet at the vortex finder for smaller particles. This segmentation allows each outlet to target specific particle size ranges, improving overall separation efficiency while maintaining low energy consumption characteristic of cyclone separation.
2Productivity
If bag filters are used to extract small particles from mixed stream, then separation efficiency is high, but energy consumption increases and cleaning requirements increase
Solution Approach 1:
The invention merges the advantages of cyclone separation (low energy consumption) with enhanced particle extraction capability by adding a secondary powder outlet at the vortex finder. This combination allows the system to achieve high separation efficiency for both large and small particles while maintaining the low energy consumption characteristic of cyclone systems, avoiding the high energy requirements and cleaning needs of bag filters.
3Productivity
If bag filters are used in pharmaceutical drying systems, then particle separation is effective, but fiber contamination risks increase
Solution Approach 1:
The invention extracts the separation function from bag filters and implements it through a multi-outlet cyclone system. By taking out the reliance on bag filters and using purely cyclone-based separation with primary and secondary powder outlets, the system achieves effective particle separation without introducing fiber contamination risks associated with bag filter materials.
4Productivity
If recirculation system with swirl tube is used to increase powder extraction, then yield efficiency increases, but system size increases and energy consumption increases
Solution Approach 1:
The vortex finder serves multiple functions: it acts as the standard cyclone component for air/gas extraction and simultaneously functions as a secondary powder extraction point through the added powder outlet. This multi-functionality allows the system to increase yield efficiency by capturing smaller particles that would otherwise escape, without requiring additional separate components like swirl tubes, thus avoiding increased system size.
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 approach enhances separation efficiency, reduces system size and energy use, minimizes cleaning downtime, and prevents fiber contamination, leading to a more compact, cost-effective, and efficient powder drying system.
Implementation Method 1
cyclones can extract a fraction of especially larger particles
Implementation Method 2
using a venturi duct for efficient particle redirection
Data Source
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AI summary
A cyclone (4) for separation of solids and gases comprising a predefined circumference and at least one inlet (42a), for supplying a mixed stream of powder and air/gas, a first outlet in the form of a powder outlet (43) at the bottom of the cyclone (4) for extracting powder, a vortex finder (45) at the top of the cyclone, said vortex finder (45) further comprising a wall (50) and a second outlet in the form of an air/gas outlet (44) for extracting air/gas, characterized in that said cyclone(4) comprises a secondary powder extraction system (46) including a third outlet (48a), located in or at the vortex finder (45) to extract powder particles from the mixed stream entering the vortex finder (45).