Tangential Filtration Device With Integrated Circulation Pump
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Solution Overview
Problem
Existing filtration devices for fluid processing are costly and bulky due to the need for complex circulation loops and external circulation pumps, which can lead to inefficient filtration and pressure drops, resulting in reduced liquid filtration efficiency.
Innovation Solution
A tangential filtration device with a series of tubular filtration elements and integrated communication chambers, where a turbine pump is housed within a separation resource, allowing for controlled circulation loops and reduced pressure drops by optimizing the flow direction between go and return circuits, thus minimizing the need for external pumps and reducing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external circulation pump is used to create a circulation loop for high-speed fluid circulation, then shear stress is generated to re-disperse deposited materials, but production costs increase and device size increases
Solution Approach 1:
The circulation pump is integrated within the separation piece housing, merging the pump function with the separation piece structure. This eliminates the need for external pumps and complex circulation loops, reducing device size and production costs while maintaining the circulation function for shear stress generation
Solution Approach 2:
The circulation pump is nested inside the separation piece housing, with the pump turbine positioned within the chamber formed by the separation piece. This nested arrangement allows the pump to utilize the existing structural space, further reducing overall device complexity and size
2Productivity
If the pump intake pressure becomes negative due to pressure drop, then circulation is maintained, but filtrate is drawn back into filtration elements reducing filtration efficiency
Solution Approach 1:
The pump intake is positioned to receive fluid from the collection chamber before the fluid enters the filtration elements. This preliminary positioning ensures that the pump draws fluid at positive pressure from the collection chamber rather than creating negative pressure at the filtration element outlet, preventing filtrate draw-back and maintaining filtration efficiency
Solution Approach 2:
The collection chamber acts as an intermediary between the filtration elements and the pump intake. This intermediate chamber buffers the pressure fluctuations, allowing the pump to draw fluid at positive pressure while the filtration elements operate under appropriate pressure differential, preventing the direct negative pressure effect that would draw back filtrate
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 solution enables efficient fluid filtration with reduced production costs and size, maintaining high filtration flow rates while avoiding negative pressure issues that decrease filtration efficiency.
Implementation Method 1
The circulation pump is used to perform the circulation of the fluid to be processed at high speed within the filtration elements, tending to generate a shear stress which re-disperses the materials deposited on the surface of the membrane channels
Implementation Method 2
the value of the pressure drop in each go or return circuit, because of the speed of circulation of the fluid, is equal to ΔP
Implementation Method 3
The filtration elements perform tangential filtration of the fluid with a view to obtaining, at the peripheral surface of the filtration elements, the discharge of the filtrate
Data Source
AI summary
A device for the tangential filtration of a fluid to be processed and intended to be divided into a filtrate and a retentate includes, in an outer case, a series of filtration elements of tubular form lying parallel to each other, at least one output for the filtrate, communicating with the filtrate collection receptacle, a first communication chamber in which are fitted the separation resources, communicating with respectively a first series and a second series of filtration elements forming the go and return circuits of a circulation loop for the fluid to be processed, where the separation resources include a turbine of a circulation pump. The input for the fluid to be processed opens into the first communication chamber of the outer case between the turbine of the circulation pump and the filtration elements of the series forming the return circuit of the circulation loop.