Multi-Stage Cyclone Separator Dipleg Merging for Bridging Prevention
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Solution Overview
Problem
Conventional cyclone separators in gas-solids reaction systems face efficiency limitations due to low solid particle flow rates, leading to catalyst bridging and reduced separation efficiency, especially in multistage configurations where the dipleg diameter is small, causing operational issues such as jamming and backflow.
Innovation Solution
The implementation of a multi-stage cyclone separator configuration where the dipleg output flows of multiple cyclone stages are merged into a single output conduit, maintaining a sufficient solid particle flux and preventing catalyst bridging, while allowing for efficient operation even with low solids content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the dipleg diameter is reduced to handle low solid catalyst particle flow rates, then the cyclone separator can operate with low solids content, but the dipleg becomes prone to catalyst bridging or compaction which prevents outflow and reduces separation efficiency
Solution Approach 1:
The cyclone separator is divided into multiple stages, with each stage handling a portion of the solid catalyst particle flow. This segmentation allows each dipleg to maintain sufficient diameter for reliable operation while the collective system processes low overall solids content, preventing catalyst bridging in individual diplegs.
Solution Approach 2:
The patent transitions from a single-stage to a multistage configuration, adding the dimension of sequential processing. This allows the system to maintain adequate dipleg dimensions for reliability while handling low solids content through multiple passes, effectively resolving the contradiction between dipleg size and solids concentration.
2Reliability
If a larger dipleg diameter is used, then catalyst bridging is prevented, but the low rate of solid catalyst flow may not be sufficient to seal the dipleg allowing gas backflow which reduces separation efficiency
Solution Approach 1:
By segmenting the low solids content flow into multiple stages, each stage receives a concentrated enough flow to properly seal its dipleg. The segmentation distributes the sealing requirement across multiple diplegs, allowing each to maintain adequate diameter and flow velocity for effective sealing without requiring an impractically large single dipleg.
Solution Approach 2:
The multistage configuration applies partial action to the solid catalyst flow, processing it in increments through multiple stages. Each stage handles a portion of the flow at sufficient concentration to seal its dipleg, collectively achieving complete separation while maintaining reliable dipleg operation throughout.
3Reliability
If conventional cyclone separators are arranged in stages to improve separation efficiency, then more solids can be removed, but the number of stages is limited by constraints on input and output flows where subsequent stages receive insufficient solids for efficient operation
Solution Approach 1:
The system segments both the gas-solids flow and the solid catalyst flow into multiple parallel paths through multiple cyclone stages. Each stage receives adequate solids concentration to operate efficiently, and the segmented liquid outlet flows are recombined to maintain sufficient overall solids removal rate, overcoming the limitation of sequential staging.
Solution Approach 2:
The patent merges the liquid outlet flows from multiple cyclone stages into a common outlet. This merging allows each stage to operate independently with sufficient solids concentration for efficient separation, while the combined output achieves high overall solids removal, resolving the contradiction between stage efficiency and total productivity.
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 enhances the separation efficiency of solid particles, particularly fine particles, by maintaining a stable solid particle flux and preventing backflow, thereby improving catalyst retention and reducing operational costs in gas-solids reaction systems.
Implementation Method 1
One method for separating solids from a gas-solids flow is to pass the gas-solids flow through one or more cyclone separators
Implementation Method 2
cyclone separators can be arranged in 'stages' so that the lower density or gas output of a first cyclone separator stage becomes the input for a second cyclone separator stage
Implementation Method 3
the high density output conduit of the earlier separator stage is merged with the high density output conduit of the subsequent separator stage
Implementation Method 4
maintaining a sufficient solid particle flux and preventing catalyst bridging
Data Source
AI summary
A multi-stage gas-solids separator is configured so that the higher density (solids) output flows of two or more of the separator stages are merged together. The multi-stage separator is preferably composed of cyclone separators, with the diplegs of at least two of the cyclone separator stages merged together.