Combustion Gas Bleeding Probe with Asymmetric Cold Gas Discharge
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Solution Overview
Problem
Conventional combustion gas bleeding probes used in cement kiln chlorine bypass systems suffer from short lifetime and performance deterioration due to uneven gas flow and temperature distribution, leading to abrasion issues.
Innovation Solution
The probe design incorporates a cold gas discharge system with multiple ports arranged to provide a vertically downward momentum vector, which adjusts based on the angle between the suction and flow directions to minimize dust collision and temperature unevenness, with discharge ports positioned to align with the gas flow's gravity center, and the method involves adjusting cold gas discharge quantities based on temperature measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cold gas is discharged from discharge ports to cool combustion gas, then chlorine removal capability is improved, but uneven gas temperature distribution and dust collision cause probe abrasion and short lifetime
Solution Approach 1:
The discharge ports are arranged asymmetrically relative to the suction direction, with specific angular positions (e.g., 30-60 degrees from the suction direction) to create a vertically downward momentum vector. This asymmetric arrangement ensures that cold gas is discharged in a controlled manner that promotes even temperature distribution while minimizing dust collision with the probe, thereby extending probe lifetime while maintaining chlorine removal capability.
Solution Approach 2:
The cold gas discharge is oriented in a direction substantially perpendicular to the suction direction, utilizing a different spatial dimension for cooling. By discharging cold gas at specific angles (30-60 degrees) rather than directly opposite or parallel to the suction direction, the system achieves effective cooling without creating harmful dust collision patterns, thus resolving the contradiction between cooling efficiency and probe durability.
2Temperature
If cold gas is discharged to cool combustion gas, then temperature distribution is improved, but dust collision with probe increases causing abrasion
Solution Approach 1:
The asymmetric arrangement of discharge ports at specific angular positions creates a vertically downward momentum vector that directs cold gas flow away from direct dust collision paths. This asymmetric design achieves uniform temperature distribution while minimizing the harmful effect of dust impact on the probe surface.
Solution Approach 2:
The system converts the potentially harmful dust-laden cold gas flow into a beneficial cooling mechanism by carefully controlling the discharge angle and momentum vector. The dust-containing cold gas is discharged in a direction that promotes even temperature distribution while the momentum vector configuration prevents direct dust collision with the probe, effectively turning a harmful factor into a beneficial one.
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 design extends the probe's lifetime and enhances its chlorine removal capability by evenly distributing cold gas and reducing temperature and flow-related stress, resulting in improved performance.
Implementation Method 1
a vector, which is composed of momentum vectors of the cold gas discharged individually from the plurality of discharge ports, has a vertically downward component
Implementation Method 2
since volatile components such as chlorine in a kiln exhaust gas are condensed to a fine powder portion of bypass dust by carrying out rapid cooling to approximately 450° or less with the probe
Implementation Method 3
a classification means such as a cyclone is arranged to a gas extraction and discharge equipment in the rear stage, and bypass dust is classified into coarse powder dust with low volatile component concentration and fine powder dust with high volatile component concentration
Data Source
AI summary
Provided is a combustion gas bleeding probe, which is elongated in lifetime and improved in chlorine removing ability and so on. The combustion gas bleeding probe (1) comprises a cold gas discharge means having a plurality of discharge ports (2b) for discharging cold gases (C) substantially perpendicularly of the suction direction (S) of a combustion gas (G) and toward the center of the combustion gas flow. A vector (A), which is composed of momentum vectors (MVs) of the cold gas (C) discharged individually from the plural discharge ports, has a vertically downward component. This vertically downward component of the synthesized vector is made the larger, as the angle between the suction direction of the combustion gas and the flow direction of the combustion gas before sucked by the probe becomes the closer to a right angle. The vertically downward component of the synthesized vector is made the smaller, as the suction direction of the combustion gas and the flow direction of the combustion gas before sucked by the probe become the closer to parallel. Two to six discharge ports can be arranged in a plane normal to the sucking direction of the combustion gas by the probe.