Feed Vessel Conical Geometry for Stable Pneumatic Conveying
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Solution Overview
Problem
Current feed vessels and systems for pneumatically conveying solid particles face unstable solid flow rates, especially under high pressure, leading to temperature fluctuations and reduced gasifier lifetime in coal gasification systems.
Innovation Solution
A feed vessel design featuring a cylindrical portion with two conical portions, where the first conical portion forms a funnel flow and the second conical portion forms a mass flow, combined with fluidizing gas introduction to ensure all particles are in motion, stabilizing the solid flow rate and facilitating controlled discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional feed vessel design is used, then device complexity is low, but solid flow rate stability deteriorates
Solution Approach 1:
The feed vessel is divided into three distinct conical portions (first, second, and third conical portions) with different half-angle values. Each portion serves a specific function: the first conical portion (larger half-angle) facilitates particle movement, the second conical portion (intermediate half-angle) maintains flow stability, and the third conical portion (smaller half-angle) controls discharge. This segmentation allows each region to optimize flow characteristics independently, achieving stable solid flow rate while maintaining manageable structural complexity.
Solution Approach 2:
Different regions of the feed vessel are assigned different geometric properties (half-angle values) to achieve local optimization. The first conical portion has a larger half-angle to promote particle movement from the cylindrical section, the second conical portion has an intermediate half-angle to maintain stable flow, and the third conical portion has a smaller half-angle to control the discharge flow. This local differentiation of geometric quality directly addresses the flow stability issue without requiring complex mechanical components.
2Productivity
If high pressure operation is used, then productivity increases, but solid flow rate stability deteriorates
Solution Approach 1:
The feed vessel is divided into three distinct conical portions (first, second, and third conical portions) with different half-angle values. Each portion serves a specific function: the first conical portion (larger half-angle) facilitates particle movement, the second conical portion (intermediate half-angle) maintains flow stability, and the third conical portion (smaller half-angle) controls discharge. This segmentation allows each region to optimize flow characteristics independently, achieving stable solid flow rate while maintaining manageable structural complexity.
Solution Approach 2:
The invention changes the geometric parameter (half-angle) of the conical portions to optimize flow behavior under high pressure conditions. By selecting specific half-angle values for each conical portion, the system maintains stable solid flow rate even at high operating pressures, thereby achieving both high productivity and flow stability.
3Temperature
If unstable solid flow rate occurs, then conveyance efficiency decreases, but temperature fluctuation increases
Solution Approach 1:
The feed vessel is divided into three distinct conical portions (first, second, and third conical portions) with different half-angle values. Each portion serves a specific function: the first conical portion (larger half-angle) facilitates particle movement, the second conical portion (intermediate half-angle) maintains flow stability, and the third conical portion (smaller half-angle) controls discharge. This segmentation allows each region to optimize flow characteristics independently, achieving stable solid flow rate while maintaining manageable structural complexity.
Solution Approach 2:
Different regions of the feed vessel are assigned different geometric properties (half-angle values) to achieve local optimization. The first conical portion has a larger half-angle to promote particle movement from the cylindrical section, the second conical portion has an intermediate half-angle to maintain stable flow, and the third conical portion has a smaller half-angle to control the discharge flow. This local differentiation of geometric quality directly addresses the flow stability issue without requiring complex mechanical components.
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 design achieves stable and controllable solid flow rates, reducing temperature fluctuations and extending gasifier lifetime by ensuring all particles are in motion, enhancing the conveyance stability and performance of the gasification system.
Implementation Method 1
The second conical portion is configured to form a mass flow of solid particles therein
Implementation Method 2
The first conical portion is configured to form a funnel flow of the solid particles
Implementation Method 3
adding a gas from the bottom of the feed vessels to fluidize the solid particles
Data Source
AI summary
A feed vessel for pneumatically conveying solid particles includes a cylindrical portion, a first conical portion and a second conical portion. The first conical portion extends downward from the cylindrical portion and is configured to be in fluid communication with the cylindrical portion. The second conical portion extends downward from the first conical portion and is configured to be in fluid communication with the first conical portion. The second conical portion is configured to form a mass flow of solid particles therein and defines at least one outlet thereon for discharging the solid particles. A method for pneumatically conveying solid particles is also presented.