Fluidized Bed Distributor with Segmented Windows for Uniform Phase Mixing
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Solution Overview
Problem
Existing fluid distribution systems in reaction chambers, particularly in fluidized beds, face challenges in achieving uniform distribution of light fluid phases amidst denser phases, leading to potential bypasses and dead zones that hinder chemical reaction homogeneity and efficiency.
Innovation Solution
A distribution device with a pipe that opens into the reaction chamber, featuring first and second windows with distinct velocities and branching structures to ensure even distribution of the light fluid phase across the reaction chamber, including central and lateral passages, optimizing flow velocities and branch lengths to enhance mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple pipe distributor is used, then the device complexity is low, but the fluid distribution uniformity is poor leading to bypasses and dead zones
Solution Approach 1:
The distributor pipe is segmented into multiple functional zones with different window configurations. First windows are positioned at the lower part of the pipe while second windows are at the upper part, creating distinct flow paths that segment the fluid distribution pattern to eliminate dead zones and improve uniformity
Solution Approach 2:
Different regions of the distributor pipe are given different local qualities through varying window positions and configurations. The first windows and second windows create localized flow patterns tailored to specific radial positions, ensuring optimal distribution characteristics in different zones of the fluidized bed
2Area of stationary object
If high velocity is used to distribute light fluid phase, then distribution coverage is improved, but excessive mixing and energy loss occur
Solution Approach 1:
The flow velocity parameter is changed and optimized for different window positions. The first windows and second windows are designed to operate at different velocity regimes, allowing the system to achieve broad distribution coverage while minimizing energy loss through optimized local flow conditions
3Device complexity
If windows are positioned only at the pipe end, then the structure is simple, but the distribution homogeneity is poor
Solution Approach 1:
The window positioning transitions from a single-point configuration at the pipe end to a distributed configuration along the pipe length. By adding the longitudinal dimension to window placement, the system achieves superior distribution homogeneity while maintaining reasonable structural complexity
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 solution achieves better phase mixing and reaction performance by ensuring comprehensive distribution of the light fluid phase, reducing bypasses and dead zones, thereby improving the homogeneity and efficiency of chemical reactions in fluidized beds.
Implementation Method 1
a pipe for transporting the light fluid phase to the reaction chamber... first windows and second windows created in a lateral wall of the pipe... branches extending each first window
Implementation Method 2
the passage sections of the first and second windows are formed such that the first velocity and the second velocity are between 0.1×V and 30×V
Data Source
AI summary
Device for distributing a light fluid phase (2) in a heavy phase (4) in the fluidized state in a reaction chamber (5), comprising: a pipe (1) for transporting the light fluid phase; first and second windows (7, 8) created in the pipe, the second windows opening into the reaction chamber; and branches (6) extending each first window and splitting into: a central passage opening into the reaction chamber via an intermediate window (9) created in the upper wall of the branch (6); and at least two distinct lateral branches forming two lateral passages (10) opening into the reaction chamber via end-of-branch windows (11).