Black Water Processing with High Pressure Flash Vessel
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Solution Overview
Problem
Current gasification systems require significant volumes of demineralized water for cleaning black water, which is inefficient and costly, and not environmentally friendly.
Innovation Solution
A black water processing system with a high-pressure flash vessel and an integrated grey water heat exchanger that exchanges heat between overhead vapors and grey water, condensing vapors and entraining solids, thereby reducing water usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If significant volumes of demineralized water are used to clean black water, then the cleaning effectiveness is improved, but the water consumption and cost increase
Solution Approach 1:
The system changes the temperature parameter of the wash water by heating it using waste heat from the gasification process. This allows the use of less demineralized water while maintaining effective cleaning, as the heated water improves the flash separation efficiency and reduces water consumption
Solution Approach 2:
The system converts the waste heat from the gasification process (which would otherwise be lost) into a useful resource for heating the wash water. This transforms a harmful waste product into a beneficial heating medium, reducing the need for additional energy input and minimizing water consumption
2Reliability
If flash separation process is used to separate dissolved gases, then the black water cleaning is improved, but the water usage increases
Solution Approach 1:
The system implements a continuous heat exchange process where the warm wash water continuously transfers heat to the incoming cold wash water. This continuous heating action maintains optimal flash separation conditions throughout the process, improving cleaning effectiveness while reducing overall water usage
Solution Approach 2:
The system modifies the temperature parameter of the wash water to optimize flash separation. By heating the wash water to specific temperature ranges, the system enhances the separation efficiency of dissolved gases from black water, improving cleaning with less water
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 approach effectively cleans black water while minimizing water consumption, reducing overall costs and environmental impact by capturing entrained solids and reducing downstream carryover.
Implementation Method 1
flashing the flow of black water to create a flow of overhead vapors in a flash vessel
Implementation Method 2
exchanging heat between the flow of overhead vapors and the flow of grey water
Implementation Method 3
condensing the flow of overhead vapors into a condensed flow
Data Source
AI summary
The present application provides a black water processing system for cleaning a flow of black water. The black water processing system may include a flash vessel for producing a flow of overhead vapors from the flow of black water. The flash vessel also may include an integrated heat exchanger in communication with a flow of grey water. The flow of overhead vapors and the flow of grey water may exchange heat in the integrated heat exchanger.