Elastic Reset Device Ash Slag Protection
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Solution Overview
Problem
Existing elastic reset devices in boilers are prone to failure due to ash slag entry, which affects the elastic reset function, and are easily disabled by high temperatures, while also failing to accommodate thermal expansion effectively.
Innovation Solution
The elastic reset device features overlapping reset blocks with a ceramic fiber blanket, heat-resistant stainless steel materials, and a guide plate to prevent ash slag interference, along with longitudinal and transverse waist shape holes for thermal expansion accommodation, and secure bolt and nut connections for easy installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an elastic reset device is provided in the grate plates to maintain constant ventilation cross section, then the ventilation cross section is kept constant, but ash slag enters the device during operation affecting the elastic reset function
Solution Approach 1:
A guide plate is introduced as an intermediary component between the ash slag and the elastic reset device. The guide plate blocks the path of ash slag, preventing it from entering and damaging the elastic members while allowing the reset function to operate normally.
Solution Approach 2:
The elastic members are extracted from the direct exposure zone to the ash slag environment by positioning them within the grate plate structure and protected by the guide plate, separating the harmful ash slag from the sensitive elastic components.
2Reliability
If an elastic reset device is provided in the grate plates to maintain constant ventilation cross section, then the ventilation cross section is kept constant, but elastic members are easily disabled because the temperature of the region is high
Solution Approach 1:
The device uses composite material construction with heat-resistant stainless steel for structural components and high-temperature resistant materials for the elastic members. This composite approach allows the device to withstand high temperatures while maintaining the elastic reset function.
Solution Approach 2:
The material properties of the elastic members are selected specifically for high-temperature resistance, changing the physical parameters (temperature resistance, elasticity) to match the harsh thermal environment while maintaining functional performance.
3Adaptability or versatility
If the width of a grate gradually increases, then the thermal expansion of the grate increases, but the ventilation cross section becomes uneven
Solution Approach 1:
The elastic reset device provides dynamic adjustment capability to the grate structure. The elastic members can expand and contract with thermal changes, automatically maintaining the ventilation cross section despite variations in grate width and thermal expansion.
Solution Approach 2:
The device is designed to accommodate thermal expansion forces, allowing the grate to expand thermally while the elastic reset mechanism maintains the ventilation cross section by compensating for the expansion through elastic deformation.
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 ensures a constant ventilation cross section, prevents ash slag interference, accommodates thermal expansion, and maintains functionality even at high temperatures, thereby enhancing the reliability and ease of maintenance of the elastic reset function.
Implementation Method 1
a ceramic fiber blanket is filled at the folding angle
Implementation Method 2
both ends of the one of the springs can press against the left reset block and the right reset block such that the left reset block and the right reset block are always in close contact with the grate plate
Implementation Method 3
all materials employ heat resistant stainless steel
Data Source
AI summary
An elastic reset device arranged in the middle of a grate plate is disclosed, which includes reset blocks, springs, sleeves and a guide plate. The reset blocks comprise a left reset block and a right reset block, the upper ends of the left and right reset blocks are partially overlapped, a folding angle α is provided at the overlapping portion and is not less than 45 degrees, and a ceramic fiber blanket is filled at the folding angle.