Char Removal Pipe Perforated Plate Gas Distribution
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Solution Overview
Problem
Char removal pipes with inclined designs face challenges in transporting powder due to uneven accumulation, leading to inefficient flow and potential clogging, especially when multiple char recovery device main bodies or supply hoppers are used in coal gasification combined power generation facilities.
Innovation Solution
A char removal pipe with a perforated plate that separates the interior into a powder channel and a gas chamber, where an assist gas is supplied to reduce friction and pressure loss, allowing for uniform ejection of gas and improved powder transport, even with uneven accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the removal pipe is disposed along a gentle slope to reduce horizontal inclination, then the device complexity is reduced, but the powder transport efficiency deteriorates due to char accumulation
Solution Approach 1:
The removal pipe is segmented into an upper portion and a lower portion with different inclination angles. The upper portion has a smaller inclination angle for easier manufacturing and installation, while the lower portion has a larger inclination angle to prevent char accumulation and ensure efficient transport to the discharge end.
Solution Approach 2:
Different sections of the removal pipe are assigned different local qualities in terms of inclination angle. The lower portion near the char supply hopper has a steeper angle to actively prevent accumulation, while the upper portion has a gentler angle for structural simplicity.
2Productivity
If assist gas is supplied to help powder flow, then the powder transport efficiency is improved, but the device complexity increases due to additional components
Solution Approach 1:
A porous plate is installed at the bottom of the char supply hopper to allow assist gas to pass through uniformly. The porous structure enables gas distribution without requiring complex piping, simplifying the overall system while maintaining effective powder transport assistance.
Solution Approach 2:
Assist gas is supplied through the porous plate to create pneumatic assistance for powder flow. This pneumatic mechanism helps prevent accumulation and promotes continuous powder movement through the removal pipe without mechanical moving parts.
3Productivity
If multiple char recovery device main bodies are used to increase treatment capacity, then the productivity is improved, but the char accumulation problem worsens due to uneven distribution
Solution Approach 1:
The system is segmented into multiple independent char supply hoppers, each with its own removal pipe and porous plate. This segmentation allows each unit to operate independently with optimized gas supply, ensuring uniform powder flow even when multiple main bodies are used in parallel.
Solution Approach 2:
Assist gas is supplied in excess through the porous plate to ensure that even with uneven powder accumulation from multiple sources, sufficient gas flow reaches all areas to maintain reliable powder transport and prevent any accumulation issues.
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 solution enables more efficient and uniform transport of powder, reducing friction and preventing clogging, thus enhancing the capacity and reducing the size of char recovery devices while maintaining effective operation.
Implementation Method 1
a perforated plate that partitions the interior of the removal pipe into a powder channel and a gas chamber; and an assist gas supplying device that supplies an assist gas to the gas chamber
Implementation Method 2
an assist gas supplying device that supplies an assist gas to the gas chamber... uniform ejection of gas and improved powder transport
Data Source
AI summary
A char removal pipe including a removal pipe (22), a perforated plate (26) that partitions the interior of the removal pipe (22) into a powder channel (29) and a gas chamber (30), and an assist gas supplying device (28) that supplies an assist gas to the gas chamber (30). The perforated plate (26) is formed so that the pressure loss when the assist gas flows from the gas chamber (30) to the powder channel (29) through the perforated plate (26) is greater than the pressure loss when the assist gas flows through accumulated powder formed by the accumulation, on the perforated plate (26), of powder flowing in the powder channel (29).