Fluidized Bed Reactor Filter with Conical Caps
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Solution Overview
Problem
In fluidized bed reactors, fine catalyst particles are lost and coke is formed due to the discharge of product streams, reducing catalyst activity and yield, as the collected catalyst is not subjected to the ammoxidation reaction and is maintained in a reduced state.
Innovation Solution
A filter portion with a filtering screen and conical caps is installed between the dust collector and the catalyst bed to effectively collect and re-supply fine catalyst particles, minimizing their loss and the influence of product streams, thereby increasing catalyst activity and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a dust collector is installed to collect fine catalyst particles, then fine catalyst particles are collected, but coke is formed due to the product in the re-supplied stream and catalyst activity is reduced
Solution Approach 1:
The invention divides the catalyst recovery system into two separate components: a dust collector for capturing fine catalyst particles and a filter portion for removing product from the gas stream. This segmentation prevents product-containing streams from reaching the catalyst bed, eliminating coke formation while maintaining catalyst activity.
Solution Approach 2:
The filter portion extracts and removes the product from the gas stream before the stream is re-supplied to the catalyst bed. This extraction prevents the product from causing coke formation on the catalyst, thereby maintaining catalyst activity and reliability.
2Productivity
If the stream containing product is re-supplied to the catalyst bed, then fine catalyst particles are recovered, but coke is formed due to the product
Solution Approach 1:
The filter portion acts as an intermediary component between the dust collector and the catalyst bed. It removes the harmful product from the stream before the stream contacts the catalyst, preventing coke formation while allowing catalyst recovery to continue.
Solution Approach 2:
The invention converts the harmful effect of product in the stream (which causes coke formation) into a beneficial separation process. The filter portion uses the product's presence as an indicator to activate the filtration function, removing the product and preventing harm to the catalyst system.
3Speed
If fine catalyst particles are discharged toward the upper portion, then the stream rises quickly, but fine catalyst particles are lost
Solution Approach 1:
The filter portion is positioned in the upper portion of the reactor where the fast-rising stream carries fine catalyst particles. By placing the filter there, the system performs preliminary capture of the particles before they can be lost outside the reactor, while still allowing the stream to rise quickly.
Solution Approach 2:
The filter portion serves as an intermediary capture mechanism in the fast-rising stream path. It intercepts fine catalyst particles during their upward movement without significantly impeding the overall stream velocity, thus preventing particle loss while maintaining rapid gas flow.
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 filter portion effectively collects fine catalyst particles, reducing coke formation and enhancing the yield of the product by re-supplying active catalyst particles to the bed, while minimizing the stream's influence on the reactor's operation.
Implementation Method 1
a filter portion provided in a region between the dust collector and the catalyst bed, wherein the filter portion includes a filtering screen and a plurality of conical caps coupled to the filtering screen
Implementation Method 2
a plurality of conical caps coupled to the filtering screen
Data Source
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AI summary
The present invention relates to a fluidized bed reactor. The fluidized bed reactor includes: a fluidized bed reactor in which a catalyst bed is provided; a dust collector provided in an upper portion of the fluidized bed reactor and collecting catalyst particles in a gas discharged toward the upper portion of the fluidized bed reactor; and a filter portion provided in a region between the dust collector and the catalyst bed, wherein the filter portion includes a filtering screen and a plurality of conical caps coupled to the filtering screen.