Nozzle Gas Flow Ratio for Solid Unloading
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Solution Overview
Problem
Existing methods for unloading granular solid matters from tubular reactors face inefficiencies due to improper adjustment of gas flow rates, leading to secondary blockages, inaccurate unloading, and reduced efficiency, especially when discharging gas towards the solid matters.
Innovation Solution
A nozzle with a specific design that includes tip opening portions and side holes, allowing for a controlled gas flow rate ratio of 0.05 to 0.7, is used to supply gas to the tubular body, adjusting the gas flow to efficiently move solid matters to the upper end without excessive discharge or suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas is discharged toward solid matters to move them to the upper end, then unloading efficiency is improved, but secondary blockages occur and unloading accuracy decreases
Solution Approach 1:
The nozzle is divided into multiple opening portions (first opening portion facing upward, second opening portion facing sideways, third opening portion facing downward) to discharge gas in different directions. This segmentation allows controlled gas flow distribution that moves solid matters upward without causing excessive discharge that leads to blockages, thereby improving both unloading efficiency and accuracy simultaneously
Solution Approach 2:
Different opening portions of the nozzle are positioned at specific locations (tip side, intermediate position, base end side) with different orientations to create localized gas discharge zones. This local quality approach ensures gas is discharged precisely where needed to move solid matters without creating secondary blockages, resolving the contradiction between efficiency and accuracy
2Speed
If gas flow rate is increased to move solid matters faster, then unloading speed improves, but secondary blockages occur reducing work efficiency
Solution Approach 1:
The gas flow is segmented into multiple discharge directions through different opening portions, distributing the gas flow rate across multiple zones rather than concentrating it in one direction. This prevents excessive local gas discharge that causes secondary blockages while maintaining overall unloading speed, thus preserving work efficiency
Solution Approach 2:
The nozzle design creates dynamic gas flow distribution where gas is discharged in multiple directions (upward, sideways, downward) to adaptively move solid matters through the tubular body. This dynamic approach prevents gas accumulation that causes blockages while maintaining continuous unloading flow, resolving the speed-efficiency contradiction
3Productivity
If gas is discharged excessively toward solid matters, then fluidization is improved, but solid matters are unloaded in excessive amounts reducing accuracy
Solution Approach 1:
Gas discharge is localized to specific opening portions at different positions and orientations within the nozzle. The first opening portion discharges gas upward for controlled fluidization, while the third opening portion discharges gas downward to prevent excessive unloading. This local quality control achieves proper fluidization while maintaining accurate unloading amount control
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 approach balances gas flow to prevent secondary blockages and ensures accurate unloading of solid matters, improving both efficiency and accuracy in the unloading process.
Implementation Method 1
a gas flow rate of the gas discharged from the one or more tip opening portions and a gas flow rate of the gas discharged from the one or more side holes are adjusted, so that a ratio (Q1a/Q1b) thereof is 0.05 to 0.7 when gas is supplied from the base end opening portion (121)
Data Source
AI summary
A nozzle includes: a flow path allowing gas to flow; tip opening portion(s) formed on a tip side of the flow path; a base end opening portion formed on a base end side of the flow path; and side hole(s) which is formed on the base end side from the tip opening portion and allows a part of the gas flowing through the flow path to be discharged toward the base end side. The tip opening portion(s) is formed in a direction of the flow path. The side hole(s) is formed along a circumferential direction of the flow path. When the gas is supplied from the base end opening portion, a ratio (Q1a/Q1b) of a flow rate (Q1a) of the gas discharged from the tip opening portion(s) and a flow rate (Q1b) of the gas discharged from the side hole(s) is 0.05 to 0.7.