Flame Detection Device with Pressure-Resistant Optical Mechanism
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Solution Overview
Problem
Current flame detection systems fail to effectively detect flames in high-temperature and high-pressure furnace chambers under explosive gas atmospheres due to limitations in temperature, pressure tolerance, and the need for large spaces for multiple detectors, leading to issues like 'miss reports' and false reports, and require shutdowns for maintenance.
Innovation Solution
A flame detection device with a pressure-resistant optical mechanism, cooling mechanism, and valve system that allows for hermetic and transparent separation of the flame signal receiver from the furnace environment, enabling safe and efficient detection without direct exposure to high temperatures and pressures, and allowing for easy maintenance and selection of appropriate detectors based on specific flame types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple flame scanners (infrared and ultraviolet) are installed to detect different fuel types, then flame detection accuracy is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent employs a flame scanner equipped with both infrared and ultraviolet detection capabilities in a single integrated device. This multi-functional approach allows the same detector to handle different fuel types (gas, oil, coal) by switching between detection modes, eliminating the need for separate detectors for each fuel type while maintaining comprehensive flame detection accuracy
Solution Approach 2:
The patent combines infrared and ultraviolet detection systems into one unified flame scanner device. By merging these two detection mechanisms that operate on different spectral ranges, the system achieves comprehensive flame detection capability across various fuel types without requiring multiple separate installations, thus reducing overall device complexity
2Reliability
If flame scanners are directly exposed to high temperature and pressure environments, then detection capability is improved, but reliability and service life deteriorate
Solution Approach 1:
The patent divides the flame scanner system into two distinct parts: a protected detection chamber housing the flame scanner, and a high-temperature zone containing the furnace interior. The detection chamber is isolated from extreme conditions through protective barriers (quartz glass window, cooling passages), allowing the flame scanner to operate in a controlled environment while still detecting flames in the high-temperature zone
Solution Approach 2:
The patent introduces a quartz glass window as an intermediary element between the flame scanner and the high-temperature furnace environment. This window allows optical signals (flame radiation) to pass through while blocking thermal energy and harmful substances. Additionally, a cooling medium acts as a mediator to maintain temperature gradients, protecting the detector from direct thermal exposure
3Ease of repair
If quartz glass sheet is used to protect phototube from high temperature, then protection is provided, but quartz glass sheet is prone to damage and requires furnace shutdown for replacement
Solution Approach 1:
The patent implements a dynamic sealing mechanism using a packing box with movable packing elements that can be adjusted or replaced without removing the entire flame scanner or shutting down the furnace. This dynamic maintenance approach allows for easy replacement of worn components while the system remains operational, eliminating the need for furnace shutdowns
Solution Approach 2:
The patent designs the sealing system with self-adjusting packing elements that can be replaced through a maintenance access port without requiring external assistance or furnace shutdown. The flame scanner and its protective components are designed to be self-contained units that can be serviced independently, allowing maintenance personnel to replace packing materials or other wear components during normal 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 device extends the service life of the detection system, allows for safe operation in high-temperature and high-pressure environments, reduces the need for multiple detectors, and enables continuous operation without shutting down the furnace, while ensuring safety in explosive gas atmospheres.
Implementation Method 1
The inside-furnace passage portion comprises a cooling mechanism, which not only plays a role in preventing the inside-furnace passage portion from being damaged by the high temperature, but also could decrease the temperature of high-temperature gas which is from inner of the furnace before it gets into the outside-furnace passage portion of the flame signal passage
Implementation Method 2
a pressure-resistant optical mechanism is arranged at an outermost end of the outside-furnace passage portion, said pressure-resistant optical mechanism hermetically and transparently separates the flame signal receiver from the flame signal passage
Data Source
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AI summary
The present invention is directed to a flame detection device comprising a flame signal receiver (1), a flame signal passage (11) and a flame signal transmitting mechanism, characterized in that, the flame signal passage (11) passes trough a furnace shell(12) into inner of the furnace and comprises an outside-furnace passage portion (11a) and an inside-furnace passage portion (11b); wherein a pressure-resistant optical mechanism (10) is arranged at the outermost end of the outside-furnace passage portion, said pressure-resistant optical mechanism hermetically and transparently separate the flame signal receiver from the flame signal passage; and wherein the inside-furnace passage portion (11b) is provided with a cooling mechanism (19). Such a flame detection device is to be arranged on a furnace shell, and it could not only conduct a flame detection on the furnace under high temperature and high pressure, but also has a selection of the proper flame signal receivers installed for different stages of operation as desired.