Angled Gasifier Transfer Line Preventing Particulate Agglomeration
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Solution Overview
Problem
Conventional gasifiers face issues with particulate agglomeration and blockages in transfer lines due to aeration gas collection, leading to inefficient flow and reduced productivity in the gasification process.
Innovation Solution
A gasifier design featuring a 'V' or 'L' shaped transfer line with angled legs and nozzles for aeration gas introduction, which prevents agglomeration by maintaining particulate flow and reducing the likelihood of blockages, allowing for efficient transfer of particulates from cyclones to the standpipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional block U-shaped transfer line is used, then the structure is simple and easy to manufacture, but the aeration gas collects in the horizontal leg causing particulate agglomeration and blockages
Solution Approach 1:
The transfer line is redesigned from a conventional block U-shape with a horizontal leg to an angled configuration where both legs are inclined at angles between 10-70 degrees relative to the horizontal plane. This dimensional change eliminates the horizontal accumulation zone for aeration gas, preventing particulate agglomeration and blockages while maintaining structural simplicity and ease of manufacture.
2Productivity
If aeration gas is introduced to fluidize particulates, then particulate flow is enhanced, but the gas collects in the horizontal leg causing agglomeration and slower flow
Solution Approach 1:
By eliminating the horizontal leg and replacing it with angled legs inclined at 10-70 degrees, the design prevents aeration gas from collecting in a horizontal accumulation zone. This ensures that the aeration gas remains distributed throughout the particulate bed, maintaining consistent fluidization and uniform particulate flow rates without agglomeration.
Solution Approach 2:
The transfer line employs asymmetric angled legs rather than a symmetric block U-shape with a horizontal section. This asymmetry in configuration ensures that gravity and gas flow work together to prevent gas accumulation, maintaining reliable and uniform particulate flow throughout the transfer line.
3Ease of operation
If the transfer line has a horizontal leg, then installation is straightforward, but blockages occur due to agglomerated particulates
Solution Approach 1:
The transfer line replaces the horizontal leg with angled legs inclined at 10-70 degrees relative to the horizontal plane. This angular configuration maintains installation simplicity while eliminating the horizontal zone where aeration gas would collect and cause particulate agglomeration and blockages, thereby enabling continuous operation.
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 angled transfer line design enhances particulate flow, reduces the risk of blockages, and maintains syngas flow, thereby improving the overall efficiency and productivity of the gasification process by ensuring continuous operation and reducing maintenance needs.
Implementation Method 1
A first end of the first leg is located above an exit point proximate a second end of the second leg. The exit point is located above a low point proximate an intersection between the first and second legs.
Implementation Method 2
Oftentimes, an aeration gas is introduced to the transfer line to fluidize the particulates so that they continue to flow therethrough.
Data Source
AI summary
Systems and methods for gasifying a feedstock are provided. A gasifier can include a transfer line having a first leg and a second leg. A first end of the first leg can be adapted to be coupled to a cyclone and a second end of the first leg can be coupled to a first end of the second leg. The second end of the second leg can be adapted to be coupled to a standpipe. A centerline through the first leg can be oriented at an angle with a centerline through the second leg of from about 40° to about 140°.