Clarifier Inlet Flow Distribution Device for Turbulence Reduction
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Solution Overview
Problem
Conventional clarifier designs suffer from inefficient liquid flow due to large-scale turbulence, leading to increased production costs, reduced quality of output, and longer residence times, which can result in product deterioration, especially in the sugar cane juice clarification process.
Innovation Solution
A novel device comprising parallel plates and baffles that redirect fluid flow, dissipating energy and reducing turbulence, allowing for efficient introduction of liquid into a vessel with minimal momentum and velocity, which can be retrofitted onto existing equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional clarifier designs are used, then the structure is simple and easy to manufacture, but large-scale turbulence is created leading to inefficient settling and longer residence times
Solution Approach 1:
The inlet flow is divided into multiple separate inlets arranged around the clarifier perimeter, with each inlet having its own flow distribution structure. This segmentation breaks the large mass flow into smaller streams that enter simultaneously at different locations, reducing the formation of large-scale turbulent eddies while maintaining overall flow capacity.
Solution Approach 2:
The flow distribution is extended from a single-point or central inlet to a distributed peripheral arrangement, utilizing the horizontal dimension around the clarifier perimeter. This spatial distribution in another dimension reduces turbulence by eliminating the large-scale circular motion that occurs with central inlet designs.
2Productivity
If multiple plates are used to increase settling area, then separation efficiency improves, but device complexity and cost increase significantly
Solution Approach 1:
The turbulence reduction is achieved preliminarily at the inlet stage through the distributed flow distribution structures, preventing turbulent eddies from forming in the first place. This preliminary action eliminates the need for complex internal plate structures later in the clarifier, as the settling area can be utilized more effectively without turbulence interference.
Solution Approach 2:
The turbulence generation function is extracted from the inlet flow distribution system, isolating the problem at its source. By designing the inlet structures to inherently distribute flow evenly and prevent eddy formation, the need for additional turbulence-reducing elements like multiple plates is eliminated or reduced.
3Loss of time
If lateral flow is used to reduce residence time, then throughput increases, but large eddies are created that interfere with settling
Solution Approach 1:
The flow distribution structures at each peripheral inlet are designed with specific local geometries that control the flow patterns in their immediate vicinity. Each local inlet structure ensures that flow enters the clarifier body in a manner that prevents eddy formation, while collectively providing the necessary throughput to reduce overall residence time.
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 device significantly reduces turbulence, enabling faster separation of solid particles from liquids, reducing residence time by up to 50% and improving separation efficiency, while being economical and easy to manufacture and maintain.
Implementation Method 1
A novel device for reducing the momentum, velocity, or both of a turbulent liquid
Implementation Method 2
dissipating energy and reducing turbulence
Implementation Method 3
enabling faster separation of solid particles from liquids
Data Source
AI summary
Apparatus is disclosed for substantially reducing the momentum, velocity, or both of a first liquid that is flowing into a second liquid. The device allows one to substantially reduce or even eliminate large-scale turbulent eddies that could otherwise be produced by liquid flowing into or within a vessel, for example in a clarifier. Suitably-sized and positioned plates and baffles induce changes of flow direction in a limited volume. By the time the fluid leaves this volume, the fluid velocity is low, and turbulence is nearly or entirely eliminated. Several of the devices may be placed at different inputs within a single clarifier, and thus increase efficiency further.