Primary Heat Exchanger Tube Layout for Boiler Scale Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heat source machines with primary and secondary heat exchangers face inefficiencies in heat exchange, leading to high water temperatures that cause boiler scale formation in the body pipe part, potentially resulting in blockages and cracks.
Innovation Solution
The heat exchange device includes a primary heat exchanger with a first and second heat transfer tube part connected in series, where the body pipe part is positioned closer to the burner, and a connecting pipe links the primary and secondary heat exchangers, allowing water to flow from the secondary heat exchanger into the body pipe part, reducing water temperature and preventing boiler scale formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If water is introduced from the secondary heat exchanger into the heat transfer tube to effectively heat water in the primary heat exchanger, then heat exchange efficiency is improved, but water temperature becomes too high causing boiler scale formation in the body pipe part
Solution Approach 1:
The primary heat exchange part is divided into two separate heat transfer tube parts (first and second) connected in series. This segmentation allows the system to distribute heat exchange across multiple stages, enabling better temperature control and preventing excessive temperature rise in any single section, thereby reducing boiler scale formation while maintaining overall heat exchange efficiency.
Solution Approach 2:
The body pipe part is positioned closer to the burner than the primary heat exchange part, creating a localized temperature gradient. This spatial arrangement ensures that the body pipe part experiences lower water temperatures compared to the primary heat exchange part, preventing boiler scale formation in the body pipe while still achieving effective heat exchange in the primary heat exchange part.
2Ease of operation
If the body pipe part is positioned closer to the burner, then drainage is improved, but the structural complexity increases
Solution Approach 1:
The body pipe part serves dual functions: it acts as both a cooling structure for the shell plate and as a drainage pathway. By merging these two functions into a single structural element, the design improves drainage capability without adding separate drainage components, thereby avoiding excessive structural complexity.
Solution Approach 2:
The body pipe part is arranged along the side wall of the shell plate in a vertical orientation, utilizing the vertical dimension for drainage. This dimensional arrangement allows gravity-driven drainage to occur naturally along the side wall, improving drainage efficiency without requiring additional horizontal drainage pathways or complex routing.
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 enhances heat exchange efficiency while suppressing boiler scale formation within the body pipe part, improving drainage and reducing costs associated with discharge plugs.
Implementation Method 1
a primary heat exchanger for recovering sensible heat of the combustion gas
Implementation Method 2
a secondary heat exchanger for recovering latent heat of the combustion gas
Implementation Method 3
recovering latent heat of the combustion gas
Implementation Method 4
a body pipe part for cooling the shell plate
Data Source
AI summary
The heat exchange device (200) includes a primary heat exchanger (10), a secondary heat exchanger (20), and a connecting pipe (60). The connecting pipe connects the primary heat exchanger and the secondary heat exchanger. The primary heat exchanger (10) includes a primary heat exchange part (11), a shell plate (12) surrounding the primary heat exchange part, and a body pipe part (13) for cooling the shell plate. The body pipe part (13) is disposed closer to a burner than the primary heat exchange part (11) and is connected to the connecting pipe (60). The primary heat exchange part (11) includes a first heat transfer tube part (111) connected to the body pipe part (13), and a second heat transfer tube part (112) connected to the first heat transfer tube part and disposed on a side opposite to the body pipe part with respect to the first heat transfer tube part.