Particulate Content Estimation in Fischer-Tropsch Slurry
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Solution Overview
Problem
The slurry bubble column reactor in Fischer-Tropsch synthesis reactions experiences filter clogging due to particulate catalysts, leading to increased backwashing frequency, filter load, and costs, with existing methods for measuring particulate content being unreliable and time-consuming.
Innovation Solution
A method to estimate particulate content in the slurry by measuring visible light transmittance after the slurry is left to stand at a temperature where hydrocarbons liquefy, allowing for accurate determination of particulates equal to or smaller than a predetermined size, reducing the need for cumbersome pretreatments and improving measurement precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If backwashing frequency is increased to remove filter clogging, then filter reliability is improved, but productivity decreases due to loss of heavy liquid hydrocarbons and increased facility load
Solution Approach 1:
The patent applies preliminary action by measuring particulate content in the slurry before filter clogging occurs. By continuously monitoring the particulate concentration and predicting potential clogging issues in advance, the system can optimize backwashing timing and frequency, avoiding excessive backwashing that would cause productivity loss while still maintaining filter reliability.
2Reliability
If backwashing frequency is increased to remove filter clogging, then filter reliability is improved, but facility cost increases due to larger filter area needed
Solution Approach 1:
By measuring particulate content in advance and predicting clogging trends, the system can maintain optimal filter performance with appropriate backwashing frequency. This prevents the need to oversize the filter area to handle excessive backwashing loads, thereby reducing facility costs while maintaining reliability.
3Difficulty of detecting and measuring
If conventional measurement methods are used to determine particulate content, then measurement capability is achieved, but measurement precision is poor and time consumption increases
Solution Approach 1:
The patent replaces complex mechanical measurement methods (such as filtration, centrifugation, or microscopy) with optical measurement. By using light scattering or light absorption principles to detect particulate content directly in the slurry, the system achieves rapid and precise measurements without cumbersome pretreatment steps, significantly improving both measurement precision and speed.
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 enables effective prevention of filter clogging by optimizing backwashing frequency and reducing measurement time and errors, ensuring efficient hydrocarbon oil production in the Fischer-Tropsch synthesis process.
Implementation Method 1
measuring visible light transmittance after the slurry is left to stand at a temperature where hydrocarbons liquefy
Implementation Method 2
measuring visible light transmittance after the slurry is left to stand
Data Source
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AI summary
A method for estimating a particulate content in a slurry of the present invention is a method for estimating a content of particulates having a predetermined particle size or less in a slurry with solid particles dispersed in hydrocarbons including a wax, the method including, based on a correlation between a visible light transmittance and a content of solid particles having the predetermined particle size or less at a temperature at which hydrocarbons including a wax are liquefied when the solid particles having the predetermined particle size or less are dispersed in the hydrocarbons, estimating a content of particulates having the predetermined particle size or less in the slurry from a visible light transmittance of a supernatant part when the slurry is left to stand at the temperature.