Modular Grate Step Module for Waste Incineration
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Solution Overview
Problem
Existing thrust combustion grates for waste incineration in large-scale plants are cumbersome for installation, maintenance, and modification due to their heavy weight and rigid modular design, which limits flexibility in zone air separation and adaptability to changing waste types.
Innovation Solution
A grate step module design featuring one fixed and one movable grate step with a hydraulic drive system, allowing for adjustable length and zone-air separation, and individually attachable grate step plates with optional cooling and weld cladding for enhanced wear resistance, facilitating easy assembly, maintenance, and adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heavy metal structures are used for thrust combustion grates to withstand mechanical, thermal and chemical stress, then strength and durability are improved, but weight increases and installation and maintenance become expensive and cumbersome
Solution Approach 1:
The grate is divided into modular components: grate steps, carrier parts, and end supports that can be independently manufactured, transported, and assembled. This segmentation allows each component to be optimized for its specific function while reducing overall system weight and complexity.
Solution Approach 2:
Different parts of the grate structure have different material properties and designs tailored to their specific requirements. For example, grate steps have wear-resistant surfaces in contact with waste, while carrier parts have optimized structural geometry for strength-to-weight ratio, avoiding unnecessary material usage in non-critical areas.
2Stability of the object's composition
If rigid modular design is used for thrust combustion grates, then structural stability is improved, but flexibility in zone air separation and adaptability to changing waste types deteriorates
Solution Approach 1:
The grate system incorporates adjustable and reconfigurable elements that allow operational flexibility. Zone air separation can be modified by adjusting carrier part positions or configuring grate step arrangements, enabling adaptation to different waste types and combustion conditions while maintaining structural integrity.
3Ease of manufacture
If large prefabricated modules are used for thrust combustion grates to simplify installation, then installation ease is improved, but maintenance and modification become difficult due to the need to replace entire modules
Solution Approach 1:
The grate system is composed of smaller, standardized modules (grate steps, carrier parts, end supports) that can be independently installed and maintained. This segmentation enables replacement of only defective components rather than entire large modules, significantly reducing maintenance time and cost while preserving installation simplicity.
4Device complexity
If ducts for coolant, air supply, and slag collection are routed directly below grate steps in longitudinal direction, then structural integration is improved, but flexibility for zone air separation and customization is severely impaired
Solution Approach 1:
The duct system is arranged in transverse direction rather than longitudinal, allowing air supply and coolant flow to be distributed across different zones independently. This dimensional reorientation enables flexible zone air separation and customization for different combustion conditions without compromising structural integration.
Data Source
AI summary
A grate step module (1) for a thrust combustion grate for the combustion of refuse in a large-scale plant has a carrier part (2) for the grate steps (3, 4), exactly one fixed grate step (3) and exactly one movable grate step (4) and also a grate step drive. The movable grate step (4) is displaceable back and forth with respect to the fixed grate step (3) by way of the grate step drive. The grate step module (1) is connectable in a row with further grate step modules (1) without a gap and in this way forms the thrust combustion grate.