Reflux Unit Deoxidation via Aeration Port Integration
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Solution Overview
Problem
In sewage treatment systems, a short reflux path leads to poor deoxidation of reflux substances, resulting in high dissolved oxygen concentrations entering anaerobic tanks, which negatively impacts phosphorus removal and denitrification processes.
Innovation Solution
A reflux unit is introduced, comprising an input section, a treatment section, and an output section, where the treatment section is located above or attached to the aeration device, utilizing vibration and filtration to deoxidize reflux substances, thereby reducing oxygen levels before they enter the anaerobic tank.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the reflux path is shortened to improve system efficiency, then the treatment speed is improved, but the deoxidation effect deteriorates resulting in high dissolved oxygen entering the anaerobic tank
Solution Approach 1:
The reflux unit is divided into three functional sections: input section, treatment section, and output section. The treatment section is further segmented into filtration components (filter plate) and deoxidation components (aeration device interaction), allowing independent optimization of each function while maintaining compact overall structure.
Solution Approach 2:
The treatment section is positioned above the aeration port in the vertical dimension, utilizing the upward flow of aerated water to enhance deoxidation. This vertical arrangement allows the reflux substance to receive intense aeration treatment without requiring a long horizontal path, thus achieving both short reflux path and effective deoxidation.
2Device complexity
If the reflux path is shortened, then the system complexity is reduced, but the dissolved oxygen concentration entering the anaerobic tank increases
Solution Approach 1:
The reflux unit merges the filtration function (filter plate) and deoxidation function (aeration device interaction) into a single integrated component structure. The treatment section combines both functions spatially, allowing the reflux substance to be both filtered and deoxidized in one compact unit, thus reducing overall system complexity while effectively controlling dissolved oxygen.
Solution Approach 2:
The aeration device, originally used for oxygen supply in the aerobic tank, is utilized to provide deoxidation function for the reflux substance. The upward flow of aerated water automatically creates turbulence and contact between the reflux substance and air, achieving deoxidation without requiring additional dedicated equipment.
3Productivity
If the treatment section is positioned above the aeration port, then the deoxidation efficiency is improved, but the device complexity increases
Solution Approach 1:
The aeration device serves dual functions: (1) providing aeration for the aerobic treatment process, and (2) creating upward flow to enhance deoxidation of the reflux substance. The filter plate also serves dual purposes: filtering the reflux substance and creating turbulence to enhance contact with aerated water. This multi-functionality reduces the need for additional dedicated components.
Solution Approach 2:
The treatment section is nested within the existing aerobic tank structure, positioned above the aeration port. The filter plate is nested within the treatment section, and the aeration device is nested within the aerobic tank. This nested arrangement allows the reflux unit to utilize the existing tank space and structures, minimizing additional 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 configuration effectively lowers the dissolved oxygen concentration of reflux substances entering the anaerobic tank, improving treatment efficiency by preventing oxygen interference with phosphorus release and denitrification processes.
Implementation Method 1
the treatment section is at least partially located above an aeration port of the aeration device
Implementation Method 2
the treatment section is provided with a gas outlet, and the gas outlet is configured for outputting oxygen generated by deoxidation
Data Source
AI summary
A reflux unit and a sewage treatment system are disclosed. The reflux unit includes an input section, a treatment section and an output section which are sequentially communicated. The treatment section is configured for deoxidizing a reflux substance input by the input section. The treatment section is at least partially located above an aeration port of an aeration device or the treatment section is attached to a surface of the aeration device.