Cyclone Separator Efficiency via Particle Size Analysis
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Solution Overview
Problem
Current methods for determining the separation efficiency of cyclone separators in circulating fluidized bed boilers are impractical due to difficulties in accurately measuring material concentrations at the inlet and outlet, which interferes with gas flow and combustion.
Innovation Solution
A method and apparatus that collect and perform particle size analysis on solid particles separated by the cyclone separator, calculating feature parameters such as particle size and uniformity, and using a predetermined correspondence to determine separation efficiency, thereby avoiding direct measurement of material concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If material concentration is measured directly at inlet and outlet of cyclone separator, then separation efficiency can be calculated, but measurement process interferes with gas flow and combustion in boiler
Solution Approach 1:
The patent uses solid particle concentration as an intermediary parameter to indirectly determine separation efficiency. Instead of directly measuring gas-phase material concentration at critical points, the method measures solid particle concentration in the gas stream, which can be done without interfering with normal boiler operation. This intermediary measurement approach resolves the contradiction by providing separation efficiency data while avoiding disruption to gas flow and combustion processes.
2Measurement precision
If pressure difference method is used to calculate material concentration, then separation efficiency can be determined, but accurate calculation is difficult in commercial units
Solution Approach 1:
The patent replaces the complex pressure difference measurement and calculation method with a direct solid particle concentration measurement approach. Instead of using pressure sensors and complex calculations to infer material concentration, the method directly measures solid particle concentration, simplifying both the measurement system and the calculation process while improving accuracy in commercial unit conditions.
3Measurement precision
If flue flow rate and material concentration are measured at outlet, then separation efficiency can be calculated, but measurement is difficult under prior art conditions
Solution Approach 1:
The patent extracts the measurement of solid particle concentration from the difficult-to-measure flue gas parameters (flow rate and material concentration). By focusing measurement efforts solely on solid particle concentration, which can be measured more easily and accurately, the method avoids the difficulties of simultaneously measuring flue flow rate and material concentration while still enabling separation efficiency calculation.
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 simplifies the measurement process, reduces interference with the boiler operation, and provides a reliable and repeatable method for determining cyclone separator efficiency.
Implementation Method 1
the cyclone separator is the critical component of the material balance system in the circulating fluidized bed boiler
Implementation Method 2
collecting solid particles separated by the cyclone separator
Data Source
AI summary
The present invention provides a method and an apparatus for determining separation efficiency of a cyclone separator. The method comprises: collecting solid particles separated by a cyclone separator; performing a particle size analysis for the collected solid particles; calculating feature parameters of the collected solid particles according to a result of the particle size analysis, wherein the feature parameters are values representing particle size and particle size uniformity of the solid particles; and determining a separation efficiency corresponding to the feature parameters of the collected solid particles as a separation efficiency of the cyclone separator, according to a predetermined correspondence between feature parameter and separation efficiency. The present invention avoids the difficulty in directly measuring the material concentrations at the inlet and the outlet of the cyclone separator and has a small interference with the apparatus. In addition, the test requires a simple operation and has a good repeatability.