Airlift Pump Micro-Stream Gas Distribution for Efficient Liquid Lifting
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Solution Overview
Problem
Existing airlift pumps are notoriously inefficient, requiring 3 or more volumes of gas to move 1 volume of water, making them unsuitable for applications where efficient liquid lifting or flow induction is necessary.
Innovation Solution
Airlift pumps equipped with a gas streaming device featuring a planar plate with multiple holes that direct gas into micro-streams, stabilized by a helical groove pattern, to enhance gas distribution and lift efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional air injection is used in airlift pumps, then gas can be introduced into water to create buoyancy, but the efficiency is poor requiring 3 or more volumes of gas to move 1 volume of water
Solution Approach 1:
The air injection system is segmented into multiple holes distributed across a planar plate, creating multiple separate gas streams instead of a single large bubble. This segmentation increases the total surface area for gas-liquid interaction and improves mass transfer efficiency, allowing less gas volume to achieve the same lifting effect
Solution Approach 2:
Different regions of the planar plate have holes of varying sizes and spacings, creating localized gas stream characteristics optimized for different positions. The helical groove pattern at the bottom of holes provides localized flow stabilization, improving overall gas distribution efficiency and reducing total gas volume needed
2Productivity
If gas is injected into water to lower density and enable lifting, then water can be moved through the tube, but the process is energetically inefficient
Solution Approach 1:
The planar plate with distributed holes ensures continuous and uniform gas distribution throughout the water column, maintaining steady-state bubble formation and ascent. This continuous action eliminates energy waste from turbulent mixing and large bubble coalescence, improving energy efficiency while maintaining water flow rate
Solution Approach 2:
The helical groove pattern modifies the gas flow parameters by stabilizing bubble ascent and controlling rise velocity. This parameter optimization improves mass transfer coefficients and reduces the energy required for gas-liquid mixing, achieving better energy efficiency
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 gas streaming device enables airlift pumps to lift 3 or more unit volumes of liquid using only one unit volume of gas, improving efficiency and making them economical for liquid lifting and flow induction.
Implementation Method 1
a planar plate with multiple holes extending therethrough, the holes dimensioned to direct the gas into multiple micro-streams for streaming air from the injection port into the mixing chamber
Implementation Method 2
stabilized by a helical groove pattern
Implementation Method 3
The injection of gas causes the density of the water to drop, which causes the water to rise within the tube
Implementation Method 4
Air-lift pumps are self-contained liquid transport devices capable of moving large quantities of water
Implementation Method 5
the ejection port have a gas discharge aperture and a liquid discharge aperture
Data Source
AI summary
This document describes a gas streaming device for use between an injection port and a mixing chamber within an airlift pump, and an airlift pump with the gas streaming device. The gas streaming device includes a planar plate with multiple holes extending therethrough, where the holes are dimensioned to direct the gas into multiple micro-streams for streaming air from the injection port into the mixing chamber. An airlift pump in combination with such a gas streaming device is useful for removing anomalously high concentrations of dissolved gas in a liquid. The increased efficiency for this invention may also enable this type of pump to be economic in other applications where it is desirable to lift a liquid or induce flow.