Gasification Injector Cooling Channels for Distal-End Heat Stress
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Solution Overview
Problem
Existing injectors for gasification apparatuses suffer from high thermal stress and deformation near the distal end due to hot spots, leading to potential damage and unusability.
Innovation Solution
A hollow cylindrical injector design with a concentric arrangement of elements and a cooling system using distilled water to prevent excessive heating, employing steam generation and distribution to manage thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the injector is placed in the combustion zone to deliver oxygen-containing gas, then the gasification process is enabled, but the distal end of the injector is subjected to high thermal stress leading to deformation and damage
Solution Approach 1:
The injector body is divided into multiple cooling channels formed by grooves in the cooling element, allowing cooling fluid to flow through separate paths. This segmentation enables more uniform heat distribution and prevents localized overheating that would cause deformation.
Solution Approach 2:
A cooling element acts as an intermediary between the combustion zone and the injector body. This cooling element with its grooves serves as a thermal buffer, absorbing excess heat and protecting the main injector body from direct thermal exposure while still allowing the gasification process to proceed.
2Temperature
If cooling fluid is delivered into the sleeve to cool the injector body, then thermal stress is reduced, but the cooling efficiency is insufficient to prevent hot spots near the injector
Solution Approach 1:
The cooling system is segmented into multiple independent cooling channels defined by grooves in the cooling element. This allows cooling fluid to access different thermal zones simultaneously, improving overall cooling efficiency and preventing localized hot spots that a single-channel system cannot address.
Solution Approach 2:
The cooling approach transitions from a single central cooling path to a multi-dimensional cooling network created by grooves at different positions and orientations. This dimensional expansion of the cooling system enables heat to be extracted from multiple locations simultaneously, effectively eliminating hot spots.
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
Prevents deformation and damage by maintaining the injector within safe temperature limits, enhancing the gasification process through steam reforming and improved gas production.
Implementation Method 1
A cooling liquid, for example distilled water, can be delivered through the opening 8 into the gap 6 to cool the injector 1
Implementation Method 2
The distilled water delivered into the gap 6, through the opening 8, is transformed into steam inside the gap 6, because of the heat transmitted to the injector 1 from inside the gasification apparatus
Implementation Method 3
The steam that exits the second holes 15, adjacent to the first holes 12, limits the temperature inside the gasification apparatus near the surface of the hollow cylindrical body 2
Data Source
Figure 1~2
AI summary
An injector (1) for a gasification apparatus comprising a hollow cylindrical body (2) inside which a hollow cylindrical element (5) is arranged concentrically, inside which a cylindrical chamber (16) is defined. Between the hollow cylindrical body (2) and the hollow cylindrical element (5) a gap (6) is defined. The hollow cylindrical body (2) is closed at a distal end (4) and the hollow cylindrical element (5) is also closed at a distal end (9), wherein a side surface of the hollow cylindrical body (2) is provided with a plurality of first holes (12), each of which communicates with the cylindrical chamber (16) of the cylindrical element (5), and with a plurality of second holes (15) that communicate with the gap (6).