Distributed energy source system utilizing waste heat deeply
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Solution Overview
Problem
Current waste heat utilization technologies in high energy consumption industries, such as thermal power plants, face inefficiencies in recycling waste heat and moisture from flue gases, leading to energy waste and environmental impacts like global warming.
Innovation Solution
A distributed energy source system incorporating a primary waste heat recycling module, membrane distillation type seawater desalination module, and membrane type thermoosmosis power generation module, which recycles and utilizes waste heat and moisture by absorbing heat from medium-high temperature flue gases to produce hot water, fresh water, and low-temperature power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If waste heat from flue gas is directly emitted, then the system complexity is low, but energy utilization ratio is poor and environmental harm increases
Solution Approach 1:
The waste heat recovery system is divided into multiple segments: high-temperature heat exchange segment, medium-temperature desalination segment, and low-temperature power generation segment. Each segment handles specific temperature ranges independently, allowing comprehensive heat recovery without requiring a single complex system.
Solution Approach 2:
Heat transfer fluids serve as intermediaries between the flue gas and various utilization devices. The primary waste heat recycling module uses heat transfer fluid to absorb heat from flue gas, which then transfers heat to cold/hot water units, desalination systems, and power generation components, enabling indirect but comprehensive heat recovery.
2Loss of energy
If high temperature flue gas is used for heat recovery, then energy utilization ratio improves, but damage to tail devices and heating surfaces increases
Solution Approach 1:
The heat recovery process is segmented by temperature zones. The primary waste heat recycling module first recovers high-temperature heat, then subsequent modules handle medium and low-temperature ranges. This segmentation prevents any single device from being exposed to excessive temperatures, reducing thermal damage while maintaining high overall recovery efficiency.
Solution Approach 2:
The system performs preliminary heat recovery in the primary waste heat recycling module before the flue gas reaches other components. By pre-cooling the flue gas and recovering heat upfront, the temperature of subsequent processing devices is kept within safe operating ranges, preventing thermal damage.
3Productivity
If comprehensive waste heat recovery is implemented, then energy utilization ratio increases, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The comprehensive waste heat recovery system is implemented through modular segmentation. Each module (cold/hot water unit, desalination module, power generation module) is an independent, standardized unit that can be manufactured separately and assembled. This reduces manufacturing complexity compared to a single integrated system while achieving comprehensive heat recovery.
Solution Approach 2:
The heat transfer fluid circuit serves multiple functions: it cools flue gas, heats water for domestic use, provides thermal energy for desalination, and generates power. This multi-functionality is achieved through a universal heat transfer medium that distributes thermal energy to various applications, simplifying the overall system architecture while maintaining high energy utilization.
4Loss of energy
If flue gas heat is used for seawater desalination, then waste heat utilization efficiency improves, but system complexity increases
Solution Approach 1:
The desalination system is merged with the waste heat recovery circuit. The heat transfer fluid from the primary recycling module directly provides thermal energy to the desalination process, combining two functions (heat recovery and water purification) into an integrated system. This reduces overall complexity compared to separate systems while improving waste heat utilization efficiency.
Solution Approach 2:
The desalination module utilizes the thermal energy already present in the heat transfer fluid without requiring additional external energy input. The system serves itself by using the warmed fluid from flue gas heat exchange to drive the desalination process, eliminating the need for separate heating systems and reducing overall 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
The system enhances energy utilization ratio and waste heat recovery efficiency, enabling seawater desalination and low-temperature power generation while reducing environmental impact.
Implementation Method 1
an absorption type cold hot water unit for introducing a medium-high temperature flue gas
Implementation Method 2
a hydrophobic membrane distillation assembly
Implementation Method 3
a hydrophobic membrane distillation assembly
Implementation Method 4
a condensation mechanism for introducing seawater as condensate water
Implementation Method 5
a heat storage mechanism connected with both a hot water output end of the absorption type cold hot water unit and a flue gas output end of the hot seawater storage mechanism
Implementation Method 6
a heating mechanism arranged in the heat storage mechanism for heating
Implementation Method 7
the heating mechanism is communicated with a membrane contactor
Data Source
AI summary
The present invention relates to a distributed energy source system utilizing waste heat deeply. The distributed energy source system utilizing waste heat deeply comprises a primary waste heat recycling module, a membrane distillation type seawater desalination module and a membrane type thermoosmosis power generation module. The distributed energy source system utilizing waste heat deeply provided by the present invention can recycle and deeply utilize waste heat and moisture in flue gas by means of the primary waste heat recycling module, the membrane distillation type seawater desalination module and the membrane type thermoosmosis power generation module to realize functions of seawater desalination and low-temperature power generation, has high energy utilization ratio and improves the waste heat utilization efficiency.