Water-cooled Sliding Combustion Grate Parallel Drive
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Solution Overview
Problem
Conventional water-cooled shear combustion grates face limitations in width, leading to uneven primary air distribution and maintenance challenges, especially with wider grate tracks, where the drive systems become inaccessible and prone to jamming, resulting in inefficient combustion due to inhomogeneous waste composition.
Innovation Solution
The implementation of a parallel drive system for movable grate plates, with individual hydraulic cylinder-piston units located outside the grate construction, allowing for synchronized movement and easy maintenance, combined with a primary air separation system across the grate width to ensure uniform combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a central hydraulic cylinder-piston unit is used to drive movable grate plates, then the drive system is compact and simple, but the grate plates become inaccessible for maintenance and are prone to jamming with wider grate tracks
Solution Approach 1:
The central drive system is segmented into multiple individual hydraulic cylinder-piston units distributed along the grate track. Each movable grate plate is equipped with its own drive unit, allowing independent operation and maintenance. This segmentation enables access to each drive unit without disrupting the entire system, solving the maintenance accessibility problem while maintaining overall system functionality.
Solution Approach 2:
The drive units are repositioned from a centralized location to distributed positions along the longitudinal dimension of the grate track. This spatial redistribution allows maintenance personnel to access individual drive units at different locations along the track, eliminating the need to shut down the entire system for maintenance of a single unit.
2Productivity
If grate track width is increased to handle larger waste volumes, then combustion capacity is improved, but primary air distribution becomes uneven and combustion efficiency decreases
Solution Approach 1:
The primary air supply system is segmented into multiple independent zones across the width of the grate track. Each zone can be controlled separately with its own air supply rate, allowing precise adjustment of air distribution to match the actual combustion needs in different areas, thereby maintaining uniform combustion efficiency even in wide grate tracks.
Solution Approach 2:
Different regions of the grate track are provided with different primary air supply characteristics tailored to local combustion conditions. This local optimization ensures that each area receives the appropriate amount of air for its specific waste composition and combustion stage, preventing both air excess and air deficiency zones.
3Ease of repair
If individual hydraulic drives are installed for each movable grate plate, then maintenance accessibility is improved, but the number of drive components increases
Solution Approach 1:
Each individual hydraulic drive unit is designed as a self-contained, modular component that can be independently maintained and replaced. The standardized design allows for easy servicing without requiring complex disassembly or system shutdown, offsetting the increased component count through simplified maintenance procedures.
Data Source
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AI summary
The invention relates to a water-cooled sliding combustion grate, comprising a combination of movable grate plates (6) and stationary grate plates (5). Said grate plates (5, 6) lie on top of each other in a step-like manner, and the movable grate plates (6) can be moved. The length of the grate plates (5, 6) passing over the grate track width is more than 6 meters. The movable grate plates (6) are driven by one parallel drive each, which comprises two separate drive units, which can each move a respective end area of a movable grate plate (6) back and forth, wherein the two drive units can be synchronized. In order to separate the primary air transversely over the grate track over a plurality of areas, at least one partition can extend along the grate track under the grate. Each of said partitions is moved along with the lower faces of the grate plates (5, 6) at the upper edge of said partitions so that said partitions are fully connected everywhere to the lower faces of the grate plates. Several primary-air compartments can also be created in the grate track longitudinal direction by installing additional partitions perpendicularly to the partitions extending in the grate track longitudinal direction so that a matrix of primary-air compartments is created.