Biomass Blending Ratio Detection via 14C Analysis
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Solution Overview
Problem
Lack of effective and reliable detection technology for biomass blending ratios in coal and biomass co-fired power stations limits the development of co-fired power generation technology and market growth, due to high costs and inefficiencies of existing methods like accelerator mass spectrometry.
Innovation Solution
A sampling and preparation system that includes a sampling pipe with a filtering device, mass flow controller, carbon dioxide trap, and 14C testing device, allowing for accurate measurement of 14C in flue gas from coal and biomass co-fired power stations, using a carbon dioxide transferring device and 14C testing device to determine biomass blending ratios with reduced manual intervention and lower costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If accelerator mass spectrometry (AMS) is used to detect 14C radioactivity, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The invention extracts only the essential function of AMS (14C detection) and implements it through a simplified system consisting of a sampling pipe with filtering device, mass flow controller, carbon dioxide trap, and a much cheaper 14C testing device, eliminating the need for complex and expensive AMS equipment while maintaining detection capability
Solution Approach 2:
The patent replaces the expensive, complex, and difficult-to-maintain AMS equipment with inexpensive, simple, and easily replaceable 14C testing devices, achieving the same detection purpose at a fraction of the cost and complexity
2Productivity
If manual intervention is used in the detection process, then ease of operation is maintained, but productivity decreases
Solution Approach 1:
The system is designed to automatically complete the entire detection process from sampling to analysis. The sampling pipe automatically draws flue gas, the filtering device automatically removes impurities, the mass flow controller automatically regulates gas flow, and the 14C testing device automatically measures radioactivity, eliminating the need for manual operations while maintaining high efficiency
Solution Approach 2:
The invention implements continuous automated sampling and detection through the integrated system, where flue gas is continuously drawn through the sampling pipe, filtered, trapped, and analyzed without interruption or manual intervention, maximizing detection productivity
3Reliability
If existing detection technologies are used, then reliability is maintained, but loss of time increases due to inefficiency
Solution Approach 1:
The system performs preliminary filtering of flue gas impurities through the filtering device and preliminary concentration of carbon dioxide through the carbon dioxide trap before 14C detection, ensuring reliable measurement conditions are established in advance, which accelerates the overall detection process while maintaining accuracy
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 provides accurate, low-cost, and rapid biomass blending ratio measurements, improving the efficiency and competitiveness of biomass blending ratio detection, enabling better regulation and market development of co-fired power generation.
Implementation Method 1
filtering the particulate matter and water in the flue gas
Implementation Method 2
filtering the particulate matter and water in the flue gas
Implementation Method 3
obtaining the amount of the pure flue gas entering the carbon dioxide trap by a mass flow controller
Implementation Method 4
fixing the carbon dioxide of the pure flue gas in a carbon dioxide trap
Implementation Method 5
a pumping device; the sampling and preparation system further includes a carbon dioxide transferring device
Implementation Method 6
the carbon dioxide transferring device is used to transferring the carbon dioxide from the carbon dioxide trap into the 14C testing device
Implementation Method 7
the 14C testing device is used for measuring the 14C in the carbon dioxide
Data Source
AI summary
A sampling and preparation system is positioned in a coal and biomass co-fired power station, which includes a sampling pipe connected with a boiler flue of the co-fired power station. The sampling pipe from the end close to the boiler flue to the other end away from the boiler flue includes a filtering device, a mass flow controller, a carbon dioxide trap and a pumping device. The sampling and preparation system also includes a carbon dioxide transfer device and a 14C testing device. The carbon dioxide transfer device is applied to transferring the carbon dioxide from the carbon dioxide trap to the 14C testing device which is applied to measuring the 14C in the carbon dioxide sample. The system may calculate the biomass blending ratio of the coal and biomass co-fired power station rapidly.