Solid fuel boiler burner
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Solution Overview
Problem
Existing solid fuel boiler burners face inefficiencies due to air flow drag from fuel pellets, requiring higher-powered fans and frequent maintenance, and have complex designs that complicate access and maintenance.
Innovation Solution
A solid fuel boiler burner design featuring a rotary combustion chamber with primary and secondary aeration ducts, a worm feeder with axial aeration ducts, and a gearwheel system that allows adjustable air flow control and easy assembly/disassembly, enhancing combustion efficiency and maintenance accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotary chamber with fuel pellets is used, then fuel delivery to combustion zone is achieved, but air flow drag significantly decreases fuel delivery amount and requires higher powered supply fans
Solution Approach 1:
The rotary chamber is divided into multiple segments with individual fuel delivery channels, allowing controlled fuel release that reduces air flow disruption and maintains efficient fuel delivery without requiring excessive fan power
Solution Approach 2:
The interior surface of the rotary chamber is equipped with localized shielding elements at specific openings, creating regions with different flow characteristics that reduce overall air drag while maintaining fuel delivery effectiveness
2Strength
If a permanently attached closing plate with fittings is used, then structural integrity is maintained, but access to fittings requires dismantling the plate
Solution Approach 1:
The closing plate is segmented into a fixed portion and a removable portion connected by detachable fasteners, allowing the removable section to be accessed for fitting maintenance while the fixed portion maintains structural integrity
Solution Approach 2:
The closing plate transitions from a static permanent attachment to a dynamic structure with detachable connections, enabling easy access to fittings while maintaining structural strength during operation
3Productivity
If a monolithic rotary fuel transporter is used, then fuel transport is achieved, but maintenance and inspection are difficult
Solution Approach 1:
The rotary fuel transporter is divided into modular segments that can be independently accessed, removed, and maintained, preserving continuous fuel transport capability while enabling easy maintenance of individual components
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 design improves combustion effectiveness, meets flue gas cleanliness standards, reduces maintenance needs, and lowers construction costs by allowing adjustable air ratios and easy access to internal components, resulting in efficient and cost-effective operation.
Implementation Method 1
the worm fuel feeder (9) has an axially placed aeration duct (16)
Implementation Method 2
combustion chamber (1) with aeration openings... Primary and secondary aeration ducts (26) and (27) are formed between combustion chamber (1) and casing (2)
Implementation Method 3
The casing (2) is connected by hooks (29) with a gearwheel (6) which is mounted rotationally between two cage bearings (18)
Data Source
AI summary
A solid fuel boiler burner has a rotary combustion chamber mounted in casing. The casing is connected by hooks to a gearwheel. The gearwheel is mounted rotationally between a pair of cage bearings. The gearwheel and a compensating and pressure plate have openings for a inflow of air from a blower chamber through an adjustable screen. The adjustable screen controls a ratio of primary to secondary air. A worm feeder delivers fuel to the combustion chamber through an outlet thereof. The worm feeder has an axially placed aeration duct therein.