Separating Device Return Flow Outlet Design
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Solution Overview
Problem
Existing separation devices for fluid mixtures, such as demisters, face challenges in achieving better separation properties and reducing creep of liquid droplets, which affects the quality of the separated fractions, especially when handling increased pressures and flow quantities.
Innovation Solution
The design incorporates an additional supply conduit with an outlet that encircles the circumference of the additional supply conduit, preventing liquid droplets from reaching the deflection means and ensuring they merge with the main channel flow, along with deflection means that deflect any remaining droplets radially, enhancing separation efficiency by minimizing central location introduction of liquid particles into the outlet flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a return conduit is arranged axially through the rotating means to reintroduce flow, then the capacity of the separating device can be increased, but liquid droplets may creep along the return conduit and be introduced into the outlet flow
Solution Approach 1:
The outlet of the additional supply conduit is designed to extend in a direction perpendicular to the axial direction of the main channel, transforming the flow introduction from an axial path to a radial path. This dimensional change allows the outlet to encircle the circumference of the additional supply conduit, effectively blocking the creep path of liquid droplets while maintaining the return flow function.
Solution Approach 2:
Deflection means are introduced as an intermediary element between the return channel and the main channel flow. These deflection means redirect the flow from the return channel away from the central outlet flow path, preventing liquid droplets that may have crept along the return conduit from being introduced into the outlet flow, thus mediating between the return flow requirement and the contamination prevention requirement.
2Object-generated harmful factors
If divergence means are introduced close to the outlet opening of the return conduit, then liquid droplet creep can be diverted, but the structural complexity of the device increases
Solution Approach 1:
The outlet of the additional supply conduit is merged with the deflection means to form an integrated structure. The outlet extends perpendicular to the axial direction and encircles the additional supply conduit, while the deflection means are positioned downstream to redirect flow. This merging eliminates the need for separate divergence means close to the outlet opening, reducing structural complexity while achieving the same function of controlling liquid droplet creep.
3Object-generated harmful factors
If the outlet of the additional supply conduit encircles the circumference, then creep of liquid droplets to the deflection means is prevented, but the manufacturing complexity increases
Solution Approach 1:
The outlet of the additional supply conduit is segmented into multiple sections that collectively encircle the circumference. Instead of requiring a single complex encircling structure, the outlet can be formed by multiple simpler components or aperture sections arranged around the conduit, making the manufacturing process more feasible while still achieving the creep prevention function.
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 significantly improves separation quality by reducing creep and maintaining high separation efficiency, allowing for effective separation of at least 90% of liquid particles from gas flows, enhancing the processing efficiency of both gas and liquid fractions.
Implementation Method 1
swirl means, positioned in the main channel, for transferring a rotating movement component to the fluid moving through the main channel
Implementation Method 2
deflection means, which are positioned downstream of the outlet, for providing a movement component in radial direction to the returning fluid fraction moving through the return channel
Implementation Method 3
separating device and method with a return flow of heavy fraction... for separating a heavy fraction from a fluid... separation of at least 90% of liquid particles from gas flows
Data Source
AI summary
The invention relates to a device for separating a heavy fraction from a fluid, comprising: a main channel (20); swirl means (6) in the main channel; collecting means (13) adjoining the main channel for collecting the discharge heavy fraction; a concentric additional supply conduit (3) with an outlet (5) and extending into the cylindrical housing (2); a return channel (16) connecting the collecting means with the additional supply conduit, and deflection means (7) wherein the outlet (5) is encircling the circumference o the additional supply conduit (3). The invention also relates to a method for separating a heavy fraction from a fluid using such a device.