Rotatable Gasifier with Oblique Axis and Ceramic Grinding Elements
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Solution Overview
Problem
Gasifiers face challenges in achieving homogeneous temperature and process control due to inhomogeneities in solid materials and accelerated gasification processes, leading to reduced efficiency and inhomogeneous reaction sequences.
Innovation Solution
A gasifier design featuring a rotatable gasification container with an obliquely inclined axis of rotation and loose ceramic grinding elements for efficient mixing and temperature homogenization, combined with a gas supply system for direct oxygen injection, allowing for continuous rotation and efficient gasification without external stirring components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a stationary gasification vessel is used with conventional mixing devices, then the structure is simple, but homogeneous temperature and process control cannot be achieved due to inhomogeneities in solid materials
Solution Approach 1:
The gasification vessel is made rotatable about a rotation axis to dynamically mix the solid material during gasification. This dynamic approach enables homogeneous temperature and process control by continuously redistributing the solid particles, eliminating local temperature variations and inhomogeneities that occur in stationary vessels.
Solution Approach 2:
The rotation axis is positioned obliquely to the vertical direction, introducing a new spatial dimension for mixing. This oblique rotation creates complex three-dimensional particle trajectories that enhance mixing efficiency and temperature uniformity compared to conventional vertical or horizontal rotation configurations.
2Productivity
If the gasification process is accelerated at elevated temperatures, then productivity increases, but homogeneous process control deteriorates due to intensified inhomogeneous reaction sequences
Solution Approach 1:
The rotatable vessel continuously mixes the solid material during rapid gasification at elevated temperatures, dynamically redistributing heat and reactants. This prevents local overheating and inhomogeneous reaction sequences that would otherwise occur during accelerated gasification, maintaining process homogeneity while achieving high productivity.
Solution Approach 2:
The continuous rotation of the vessel ensures uninterrupted mixing action throughout the gasification process. This continuous mechanical agitation maintains homogeneous temperature distribution and reaction conditions even during rapid gasification, preventing the development of localized inhomogeneities.
3Stability of the object's composition
If external mixing devices such as agitators are used, then mixing efficiency improves, but the device complexity increases and temperature-sensitive components are exposed to harsh conditions
Solution Approach 1:
The mixing function is extracted from internal agitators or stirring devices and transferred to the rotation of the entire gasification vessel. This eliminates the need for temperature-sensitive mixing components inside the vessel, simplifying the overall device structure while achieving effective mixing through the oblique rotation of the vessel itself.
4Stability of the object's composition
If a vertical rotation axis is used, then the structure is simple, but efficient mixing and circulation of solids cannot be achieved
Solution Approach 1:
The rotation axis is positioned obliquely to the vertical direction rather than being perfectly vertical or horizontal. This asymmetric orientation creates optimal particle circulation patterns and mixing trajectories, enhancing solid material circulation and mixing efficiency while maintaining structural feasibility.
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 design enhances process control and efficiency by ensuring continuous mixing, comminution, and temperature homogenization, enabling rapid and homogeneous gasification of solids with high throughput while maintaining process efficiency.
Implementation Method 1
grinding elements loosely arranged within the gasification vessel... efficient mixing of the solids within the gasification vessel... circulation of the solids
Implementation Method 2
grinding elements... for efficient mixing and temperature homogenization... continuous mixing, comminution
Implementation Method 3
continuous mixing... and temperature homogenization... rotating the gasification vessel itself around the axis of rotation which is inclined to the vertical and resulting in circulation and mixing of the solid
Implementation Method 4
efficient mixing of the solids within the gasification vessel... continuous mixing
Implementation Method 5
gas supply system for direct oxygen injection... supply of oxygen-containing gas
Implementation Method 6
rotation axis inclined to the vertical... resulting in circulation and mixing of the solid
Implementation Method 7
rotation axis inclined to the vertical... circulation of the solids
Data Source
Figure 1~2
Figure 3~4
AI summary
Gasifier for producing a combustible gas from a solid (2), comprises a gasification container (10) for receiving the solid to be gasified, a solid feeding device, a combustion gas discharge device, and several grinding elements (3) which are loosely arranged within the gasification container. The gasification container is rotatably mounted around a rotational axis which extends obliquely to the vertical, preferably horizontally, and is mechanically coupled with a drive device for rotating the gasification container around the rotational axis. An independent claim is also included for producing the combustible gas from the solid, comprising (a) supplying the solid into a gasification container, (b) pyrolyzing the solid within the gasification container, (c) rotating the gasification container around the rotational axis, and (d) discharging the combustible gas from the gasification container, where the solid within the gasification container is mixed and thermally homogenized using the grinding elements made of ceramic material, preferably balls, which are arranged in the container.