Windmill-Driven Re-aeration Pipe for Wetland Substrate Oxygenation
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Solution Overview
Problem
Current re-aeration methods for subsurface flow wetlands, such as PVC pipes and water-fall waterscapes, are insufficient in generating a sufficient unit re-aeration amount due to long hydraulic retention time and unstable water pressures, and existing blower-driven methods are costly and complex, limiting the purification efficiency of constructed wetlands.
Innovation Solution
A re-aeration device comprising a tubular re-aeration pipe with a windmill that utilizes natural wind to draw air into the pipe, which is then transported to different depths of the wetland substrate through coaxially telescoped inner pipes, enhancing oxygen delivery and purification efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PVC pipes or water-fall waterscapes are used for re-aeration, then the structure is simple, but the unit re-aeration amount is insufficient due to long hydraulic retention time and unstable water pressures
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism that allows the re-aeration device to adapt to varying water flow conditions. The device can adjust its operation based on real-time water pressure and flow rate, transforming from a static system to a dynamic one that maintains optimal re-aeration performance under different operating conditions, thereby resolving the contradiction between structural simplicity and re-aeration effectiveness.
Solution Approach 2:
The patent changes key operating parameters such as water pressure thresholds, flow rates, and aeration intensity dynamically. By monitoring and adjusting these parameters in real-time, the system overcomes the limitation of unstable water pressures and achieves sufficient unit re-aeration amount without complicating the overall structure, thus resolving the technical contradiction.
2Reliability
If blower devices actuated by motors are used for re-aeration, then sufficient oxygen delivery and re-aeration effects are achieved, but the cost is relatively high and the implementing process is complex
Solution Approach 1:
The patent designs a self-regulating re-aeration system that uses the natural energy of flowing water to drive the aeration process. The device automatically activates and adjusts its operation based on water flow conditions without requiring external motor actuation, thereby achieving reliable re-aeration effects while eliminating the complexity and cost associated with motor-driven blower devices.
Solution Approach 2:
The patent replaces the motor-driven mechanical system with a passive hydraulic-driven system. By utilizing the kinetic energy of flowing water directly to power the re-aeration mechanism, the invention eliminates motors and complex control systems, thus achieving both cost reduction and implementation simplification while maintaining effective oxygen delivery.
3Reliability
If blower devices actuated by motors are used for re-aeration, then sufficient oxygen delivery and re-aeration effects are achieved, but the cost is relatively high
Solution Approach 1:
The patent creates a self-powered system that harnesses the natural energy of water flow to drive re-aeration, eliminating the need for expensive motor-driven blower devices. This approach maintains effective oxygen delivery while significantly reducing operational and capital costs by requiring no external energy input.
Solution Approach 2:
The patent employs simple, low-cost mechanical components that can be easily manufactured and replaced if needed, rather than expensive motor-driven systems. The use of basic hydraulic mechanisms and passive structures reduces both initial investment and maintenance costs while achieving the required re-aeration reliability.
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 increases the concentration of dissolved oxygen in the wetland substrate, improving re-aeration efficiency and capacity, while being simple, low-cost, and energy-efficient, thus enhancing the overall purification effectiveness of constructed wetlands.
Implementation Method 1
the windmill comprises a plurality of fan blades configured to rotate and change air flow direction
Implementation Method 2
use the pressure difference created by water flow to increase re-aeration capacity of the substrate directly by the atmosphere
Data Source
AI summary
In one aspect, the present disclosure involves a re-aeration device and re-aeration method for constructed wetland. In one aspect, the re-aeration device comprises a re-aeration pipe and a windmill. The re-aeration pipe has a tubular structure with openings at both ends; one end inserts into the wetland substrate, and the other end connects with the windmill for receiving and accelerating air flow. The re-aeration pipe may also contain several telescoped or parallel arranged pipes with openings at both ends as well as with different pipe diameters and lengths, which connect with the windmill to form the re-aeration device. The present disclosure also provides a method of re-aeration for constructed wetlands by using the above-mentioned device. The re-aeration device provided herein has features of being simple in structure, environment friendly, and low-cost. In one aspect, the re-aeration method is characterized as simple, practicable, energy-efficient, environment friendly, low-cost, widely applicable, and having good effect and high performance on re-aeration.