Thermal Power Boiler Supporting Structure Height Reduction
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Solution Overview
Problem
The increasing size and weight of thermal power boiler supporting structures, due to larger boiler units, lead to higher material costs and complex assembly, while long hanger rods cause thermal expansion issues that complicate the design and increase the height of the boiler plant.
Innovation Solution
The main supporting beams and flue gas channels are arranged parallel to each other and aligned with the short side walls, allowing for a more compact structure with the flue gas channels positioned close to the main supporting beams, reducing the overall height and using secondary supporting beams to support the flue gas channels, which also act as assembly and lift beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the capacity of thermal power boilers is increased by using larger units, then the power output is improved, but the size and weight of the supporting structure increases
Solution Approach 1:
The patent repositions the flue gas channels from a traditional vertical arrangement to a horizontal arrangement above the furnace, aligned parallel to the main supporting beams. This dimensional change allows the channels to be supported by the bearing structure at a lower height, reducing the overall plant height and allowing for more compact supporting structure design that can handle larger boiler capacities without proportionally increasing structure weight.
Solution Approach 2:
The main supporting beams are designed to serve multiple functions: they support both the furnace suspension structure and the flue gas channels simultaneously. This multi-functionality reduces the need for separate supporting structures for different components, thereby reducing the overall weight of the supporting structure while maintaining the capacity for larger boiler units.
2Strength
If the outer dimensions of the supporting structure are increased to support larger boilers, then the load capacity is improved, but the material costs and assembly complexity increase
Solution Approach 1:
The patent merges the support functions for the furnace and flue gas channels into a single integrated bearing structure. The main supporting beams simultaneously carry both the furnace suspension loads and the flue gas channel loads, reducing the number of separate structural elements and simplifying assembly while maintaining adequate load capacity for larger boilers.
Solution Approach 2:
By arranging flue gas channels horizontally above the furnace and aligning them with the main supporting beams, the patent creates a more compact three-dimensional arrangement. This reduces the vertical height requirements and allows for a more efficient use of space, reducing material quantities and simplifying assembly operations compared to traditional vertical arrangements.
3Reliability
If long hanger rods are used to accommodate thermal expansion, then the thermal expansion accommodation is improved, but the plant height increases
Solution Approach 1:
The patent transitions from vertical to horizontal arrangement of flue gas channels, which shortens the required length of hanger rods and suspension elements. The horizontal alignment with main supporting beams allows thermal expansion to be accommodated within a compact vertical space, maintaining reliability for thermal expansion while significantly reducing overall plant height.
Solution Approach 2:
The patent changes the spatial parameters of the flue gas channel arrangement, positioning them at a lower height and aligning them horizontally with the main supporting beams. This parameter change reduces the vertical distance that hanger rods must span, thereby accommodating thermal expansion requirements without increasing plant height.
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
This configuration results in a lighter, smaller supporting structure, reducing material costs and simplifying assembly, while minimizing thermal expansion stresses and providing additional space above the furnace for equipment placement.
Implementation Method 1
a bearing structure, which comprises vertical pillars and main supporting beams supported by the vertical pillars
Implementation Method 2
a sufficient length is required for the hanger rods of the furnace due to the horizontal thermal expansion of the furnace
Data Source
AI summary
A thermal power boiler includes a furnace enclosed by two short side walls and two long side walls, flue gas channels arranged above the furnace, a back pass and a supporting structure. The supporting structure includes a stationary bearing structure supported from below. The bearing structure includes multiple vertical pillars and a parallel main supporting beams supported by the vertical pillars, and a suspension structure, so that the furnace hangs from the bearing structure. The main supporting beams and the flue gas channels arranged above the furnace are parallel with each other and parallel with the short side walls. The main supporting beams are preferably arranged at least partially between the flue gas channels extending over the roof of the furnace.