Gas-Liquid Recycling Device for Sewage Reflux

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Solution Overview

Problem

The existing sewage treatment processes consume excessive energy and increase operating costs due to high reflux ratios of nitration liquids and inefficient oxygen utilization in nitrification processes, particularly with large power consumption by blower systems for aerating aerobic tanks.

Innovation Solution

A gas-liquid recycling device comprising a gas collection hood, gas delivery pipe, and liquid delivery pipe, which collects gas generated in the biochemical treatment process and uses it as power to reflux liquids, reducing energy consumption and process complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a nitrification liquid reflux pump is used to return nitrate to the front-end treatment process, then nitrogen removal is achieved, but power consumption and operating cost increase significantly

Engineering Contradiction:

Improvepower consumptionVSAvoidnitrogen removal rate

Core Design Contradiction:

Loss of energyVSProductivity

Solution Approach 1:

The system uses the waste gas (biogas or air) generated during sewage treatment itself as the power source to drive the liquid reflux process. The gas lift device converts the kinetic energy of rising gas bubbles into liquid flow, enabling the system to refill itself without external energy input for pumping

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the mechanical reflux pump system with a gas lift system that uses gas-liquid two-phase flow mechanics. Instead of using mechanical energy from an electric motor to drive the pump, the system uses the buoyancy and kinetic energy of gas bubbles to propel liquid upward through the delivery pipe

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Use of energy by moving object

If a blower blows large amounts of air into the aerobic tank for nitrification, then oxygen supply is sufficient, but 90% of kinetic energy consumed is wasted

Engineering Contradiction:

Improveoxygen utilization rateVSAvoidkinetic energy loss

Core Design Contradiction:

Use of energy by moving objectVSLoss of energy

Solution Approach 1:

The patent converts the waste gas (which would otherwise be discharged uselessly) into a useful resource by using it as the driving force for liquid reflux. The gas that represents wasted energy is now harnessed to perform useful work in circulating the nitrification liquid

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

Instead of discarding the waste gas from the aerobic tank, the system recovers its kinetic energy and uses it to drive the liquid reflux process, transforming a waste stream into a valuable energy source

Inventive Principle:

Principle #34Discarding and recovering

3Reliability

If sludge and nitrification liquid are returned to the front end of treatment, then microorganism concentration is maintained, but device complexity increases

Engineering Contradiction:

Improvemicroorganism concentration stabilityVSAvoidreflux system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The gas lift device serves multiple functions simultaneously: it provides gas-liquid mixing, drives liquid reflux, and can be used for both sludge return and nitrification liquid return. This multi-functionality reduces the need for separate devices for each reflux function

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the gas supply system with the liquid reflux system by using the same gas delivery infrastructure to power the liquid circulation. The gas collection hood and delivery pipe system is integrated with the liquid delivery pipe to create a unified reflux mechanism

Inventive Principle:

Principle #5Merging (Combining)

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 power consumption, simplifies the treatment process, and enhances environmental friendliness by utilizing collected gas as power for liquid reflux, thereby lowering operational and maintenance costs while achieving high nitrogen removal rates and compliance with discharge standards.

Implementation Method 1

A gas outlet port 2-2 of the gas delivery pipe is inserted into a liquid outlet port 3-1 of the liquid delivery pipe 3... using it as power to reflux liquids

Methodology Applied

Scientific EffectGas pressure: Pressure Gradient

Implementation Method 2

a gas collection hood 1, a gas delivery pipe 2 and a liquid delivery pipe 3... collects gas generated in the biochemical treatment process

Methodology Applied

Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Data Source

PatentUS11952299B2Gas-liquid recycling device and method of using same

Publication Date: 2024.04.09 SUZHOU UNIV OF SCI & TECH

AI summary

The disclosure relates to the technical field of energy saving and consumption reduction, and in particular, to a gas-liquid recycling device. A gas-liquid recycling device and a method of using same provided by the disclosure includes a gas-collection hood, a gas delivery pipe and a liquid delivery pipe. A gas inlet port of the gas delivery pipe is connected to the gas collection hood, a gas outlet port of the gas delivery pipe is inserted into a liquid outlet port of the liquid delivery pipe, and a liquid inlet port is located at an end of the liquid delivery pipe opposite to the liquid outlet port.