Parallel-Cooled Grate Bar Layout for Lower Pressure Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional grate bars in combustion plants experience significant pressure loss and require high-power cooling water pumps due to long, complex cooling pipe paths with bends and curves, leading to high operational costs and maintenance needs.
Innovation Solution
A grate bar design with integrated cooling pipes arranged in parallel configurations, including inlet and outlet distributors and collectors, reduces pressure loss by optimizing the flow path, allowing for reduced pumping capacity and efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional grate bars with rounded corners and smooth transitions are used, then manufacturing complexity is reduced, but soot accumulation increases due to insufficient airflow
Solution Approach 1:
The grate bar features localized sharp edges and corners at specific positions (front edge, rear edge, side edges) rather than uniform rounding throughout. This local quality change creates targeted airflow patterns at critical locations where soot accumulation occurs, while maintaining manufacturing feasibility through defined geometric features.
Solution Approach 2:
The sharp edges and corners dynamically influence gas flow patterns during combustion, creating turbulent flow that actively prevents soot deposition. The geometric features transform the static grate structure into a dynamic flow control element that adapts to combustion conditions.
2Object-generated harmful factors
If grate bars with sharp edges and corners are implemented, then soot accumulation is reduced through improved airflow, but manufacturing complexity increases
Solution Approach 1:
The sharp edges and corners are applied locally at critical positions (front edge, rear edge, side edges) rather than requiring complex overall geometry. This localized approach minimizes manufacturing complexity while achieving the airflow control needed to prevent soot accumulation.
3Object-generated harmful factors
If the first gas flow channel is positioned closer to the combustion chamber, then soot prevention is improved, but heat loss to the first gas flow increases
Solution Approach 1:
The first gas flow channel is positioned close to the combustion chamber only in specific regions where soot accumulation is most problematic, rather than uniformly across all surfaces. This partial action approach prevents soot in critical areas while limiting overall heat loss exposure.
Solution Approach 2:
The proximity of the first gas flow channel to the combustion chamber is applied locally at strategic positions to maximize soot prevention effectiveness while minimizing the surface area exposed to high temperatures, thereby reducing heat loss.
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 new design minimizes pressure loss and reduces the need for high-power pumps, lowering operational costs and maintenance requirements while maintaining effective cooling of grate bars.
Implementation Method 1
The grate bar (1) has a geometry that generates a first gas flow channel (2) extending from the front to the rear of the combustion chamber (10) along an inner wall (11) of the combustion chamber (10)
Implementation Method 2
a combustion system for a steam generator, wherein the combustion system has a combustion chamber (10) in which fuel is combusted
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
The invention relates to a grate bar (100) for combustion systems, comprising a substantially closed surface facing the combustion side, a rear support region which is designed to be supported on a grate support, a front nose region which runs between the surface and the front edge and which comprises a support region formed on the lower face, and a grate cooling tube system (102) which is integrated in the grate bar (100) for conducting a cooling liquid, wherein the grate cooling tube system (102) has an inlet distributor (104) for supplying the cooling liquid, an outlet collector (114) for discharging the cooling liquid, and multiple cooling tubes (108', 108", 112', 112"), each of which is individually connected to the inlet distributor (104) and the outlet collector (114) in a fluid-tight manner.