Vapor Heating Device for Sludge Drying Flue Gas Integration
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Solution Overview
Problem
Existing vapor utilization processes are limited by low vapor introduction temperatures, requiring complex multi-stage systems and necessitating the presence of a wastewater treatment plant or district heating network to manage condensate disposal, restricting flexibility and increasing costs.
Innovation Solution
A method and system that heats vapors to a higher introduction temperature of at least 500 °C, allowing complete vapor utilization without condensate production, enabling site-independent operation by integrating a vapor heating device with a combustion system to recover thermal energy from the flue gas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If vapors are introduced at low temperatures (300-320°C) into the flue gas, then the vapor utilization process is simpler, but the vapor introduction quantity is limited and condensate is produced requiring wastewater treatment
Solution Approach 1:
The vapor is preheated to at least 500°C before introduction into the flue gas. This preliminary heating action ensures that the vapor maintains a temperature differential sufficient to prevent condensation, allowing complete vapor utilization without requiring wastewater treatment facilities.
Solution Approach 2:
The invention changes the critical parameter of vapor introduction temperature from the conventional 300-320°C to at least 500°C. This parameter change fundamentally alters the process outcome, enabling complete vapor utilization and eliminating condensate formation, thereby simplifying the overall system despite the added heating step.
2Adaptability or versatility
If vapors are introduced at low temperatures (300-320°C), then the process requires wastewater treatment plant or district heating network, but heating vapors to higher temperature requires additional energy input
Solution Approach 1:
The vapor heating process is merged with the existing flue gas system. The hot flue gas, which would otherwise be wasted, is used as the heating medium to preheat the vapor before introduction. This integration eliminates the need for separate energy input while enabling complete vapor utilization and site-independent operation.
Solution Approach 2:
The invention converts the waste heat in the flue gas, which is normally a harmful environmental discharge, into a useful resource for heating the vapor. This transforms a waste stream into the energy source needed for the vapor heating process, eliminating both environmental harm and energy consumption.
3Loss of substance
If vapors are heated to at least 500°C before introduction, then complete vapor utilization is achieved without condensate, but the vapor heating device adds system complexity
Solution Approach 1:
The system heats the vapor using its own internal resources - the hot flue gas generated during the combustion process. The flue gas serves dual purposes: as the combustion product and as the heating medium for the vapor. This self-service approach eliminates external energy requirements and simplifies the overall system architecture.
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
Facilitates complete vapor utilization without condensate disposal, allowing flexible operation without a wastewater treatment plant, reducing complexity and costs, and enabling efficient energy recovery.
Implementation Method 1
the vapors are heated to a vapor introduction temperature of at least 500 °C, in particular to a vapor introduction temperature of at least 500 °C and at most 950 °C
Implementation Method 2
integrating a vapor heating device with a combustion system to recover thermal energy from the flue gas
Implementation Method 3
combustion of a fuel in a combustion system
Data Source
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AI summary
The invention relates to a method for utilising vapours (B) which are obtained during the drying of a solid material (KS), preferably a sludge (KS), wherein the vapours (B) are introduced into a flue gas (R) which is obtained during combustion of a fuel (TS) in a combustion system (4, 8), and wherein the vapours (B) to be introduced into the flue gas (R) are heated to a vapour introduction temperature (BT4) of more than 350 °C. The invention further relates to a vapour utilisation system (9) for utilising vapours (B) which are produced during the drying of a solid material (KS), and to a utilisation plant (100), preferably a sludge utilisation plant (100), having such a vapour utilisation system (9).