Solid Fuel Pulverizer Combustion Detection
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Solution Overview
Problem
Existing solid fuel pulverizing devices cannot immediately detect rapid combustion and may be mistakenly stopped due to detector failures, leading to false detection and potential safety risks.
Innovation Solution
A solid fuel pulverizing device equipped with a rotary table, roller, classifier, ventilation unit, internal pressure detector, primary air flow rate detector, and controller, which transitions to a stopped state when internal pressure rises and primary air flow rate decreases, using reference pressures and multiple detection methods to prevent false detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single pressure detector is used to detect rapid combustion, then the detection speed is improved, but false detection due to detector failure cannot be prevented
Solution Approach 1:
The patent applies local quality by using multiple pressure detectors positioned at different locations within the pulverizer housing. Each detector monitors a specific local area, and the combination of multiple local detection points provides both rapid response and redundancy against false detection from single-point failures.
Solution Approach 2:
The patent segments the detection function by dividing it into multiple independent pressure detectors rather than using a single detector. This segmentation allows the system to maintain detection capability even if one detector fails, and enables cross-validation of detection signals to prevent false alarms.
2Measurement precision
If the pressure detector is disposed inside the housing where fine powder exists, then the detection accuracy is improved, but failure to occur increases
Solution Approach 1:
The detection function is segmented across multiple detectors, so that even if one detector inside the housing fails due to fine powder exposure, other detectors can still provide accurate detection. This segmentation maintains detection accuracy while improving overall system reliability.
Solution Approach 2:
Different detectors are placed at different local positions within the housing, each experiencing different levels of fine powder exposure. This distribution of detection points ensures that local failures do not compromise overall detection accuracy.
3Reliability
If a timer is used to clock a certain period before stopping the pulverizer, then false stopping is prevented, but immediate response to rapid combustion is delayed
Solution Approach 1:
The detection system is segmented into multiple independent detectors, allowing the system to immediately detect rapid combustion through any one of them without requiring timer delays for confirmation. The redundancy provides immediate response while maintaining reliability.
Solution Approach 2:
The system uses feedback from multiple simultaneous detector readings to immediately confirm rapid combustion events, eliminating the need for timer-based delay confirmation. The cross-validation provides immediate reliable detection without sacrificing response speed.
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
Enables immediate detection of rapid combustion and prevents false detection caused by detector failures, ensuring safe operation by transitioning to a stopped state based on combined pressure and flow rate thresholds.
Implementation Method 1
The internal pressure detector is configured to detect an internal pressure of the housing relative to a reference pressure
Implementation Method 2
The primary air flow rate detector is configured to detect a flow rate of the primary air blown into the interior of the housing by the ventilation unit
Implementation Method 3
when rapid combustion occurs inside the housing that houses the rotary table, the roller, and the classifier, the internal pressure of the housing rises due to the rapid combustion
Data Source
AI summary
Provided is a solid fuel pulverizing device (100) provided with: a ventilation unit (30) configured to ventilate an interior of a housing (11) with primary air for supplying a solid fuel pulverized by a roller (13) to a classifier (16); a pressure detector (50) configured to detect an internal pressure of the housing (11) relative to a reference pressure; a flow rate detector (60) configured to detect a flow rate of the primary air blown into the interior of the housing (11) by the ventilation unit (30); and a controller (40) configured to perform control and transition the solid fuel pulverizing device (100) to a stopped state upon the internal pressure detected by the pressure detector (50) being a predetermined pressure or higher and the flow rate of the primary air detected by the flow rate detector (60) being a predetermined flow rate or less.