Emission Bleeder Hood and Jet Mixing for Complete Gas Combustion
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Solution Overview
Problem
Conventional emission bleeders struggle to efficiently mix and burn flammable gases, leading to a significant amount of unburned gases being released into the atmosphere, and require complex alterations to the apparatus configuration or gas flow, increasing costs and complexity.
Innovation Solution
An emission bleeder with a bleeder pipe, hood, and blowing pipe configuration that promotes combustion by injecting combustion-promoting gas into the hood, utilizing a notch in the hood and controlled inclination of the blowing pipe to enhance gas mixing and stirring, with specific angle ranges for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air is taken in by negative pressure in a hood, then gas mixing occurs, but the mixing and stirring is not efficient and complete combustion is difficult to achieve
Solution Approach 1:
The hood is divided into multiple air intake regions with different air passage configurations. Multiple air passages are provided at different positions and orientations to create segmented air injection points, enabling more effective gas mixing and stirring without requiring complex external control systems.
Solution Approach 2:
Different regions of the hood have different air passage characteristics (sizes, numbers, intervals, orientations) tailored to local combustion needs. This creates localized optimal mixing zones throughout the hood, improving overall combustion efficiency while maintaining simple apparatus configuration.
2Productivity
If air passage sizes, numbers, intervals are adjusted to improve combustion efficiency, then combustion efficiency improves, but apparatus configuration and operating method become complicated
Solution Approach 1:
The hood structure itself provides the air mixing and control functions through its built-in air passages. The design automatically achieves efficient mixing through the geometric arrangement of air passages without requiring external control mechanisms or complex operating procedures, making the system self-regulating and easy to operate.
3Productivity
If flammable gas flow is changed to pass through bleeder pipe with air intake from outer pipe, then combustion efficiency improves, but whole equipment must be altered
Solution Approach 1:
The hood structure serves multiple functions: it contains the combustion process, provides segmented air intake through multiple passages, creates negative pressure for automatic air suction, and facilitates gas mixing. This multi-functionality allows existing bleeder pipe systems to be upgraded efficiently without requiring fundamental changes to the overall equipment configuration.
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 effectively reduces the emission of unburned coke oven emission gas while minimizing the cost and complexity of altering the emission bleeder, promoting complete combustion and reducing soot generation.
Implementation Method 1
a blowing pipe that is provided along a circumferential direction of the bleeder pipe and blows combustion promoting gas for promoting combustion into the hood from a gap between the bleeder pipe and the hood
Implementation Method 2
these gases are mixed and ignited by an ignition device to burn the flammable gas
Implementation Method 3
a negative pressure thus generated in the hood causes gas (e.g., air) containing oxygen to be taken into the hood through a gap between the hood and the bleeder pipe
Data Source
Figure 1~2
Figure 3~4(d)
Figure 5(a)~5(b)
AI summary
Provided is an emission bleeder that can promote combustion of coke oven emission gas containing flammable gas and reduce an emission amount of unburned coke oven emission gas while keeping a cost for altering the emission bleeder small. An emission bleeder 1 that burns and releases coke oven emission gas into atmosphere, including a bleeder pipe 3 that distributes the coke oven emission gas 17; a hood 2 that is provided on an upper end side 3A of the bleeder pipe 3, has an inner diameter larger than an outer diameter of the bleeder pipe 3, and whose lower end side 2A surrounds the upper end side 3A of the bleeder pipe 3; a blowing pipe 4 that is provided along a circumferential direction of the bleeder pipe 3 and blows combustion promoting gas 8 for promoting combustion into the hood 2 from a gap 5 between the bleeder pipe 3 and the hood 2; and an ignition device 6 that is disposed on an inner wall of the hood 2, in which the hood 2 has a notch part 7 at a position that faces a position in the circumferential direction where the blowing pipe 4 is disposed across a central axis line O of the hood 2.