Heating Device Ash Sealing via Screw Conveyor Shaft
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Solution Overview
Problem
Existing heating devices are inefficient due to the need for high drive power to operate screw conveyors, which is exacerbated by the requirement for a storage duct and ash compaction to achieve gas-tight sealing, leading to increased space usage and electrical energy consumption.
Innovation Solution
A compact heating device design that eliminates the storage duct and ash compaction by using a sealing flap and a U-shaped lead-through opening, allowing ash to loosely follow and seal the passage, reducing the need for high drive power and electrical energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a storage channel and ash compaction process are used to achieve gas-tight sealing, then sealing reliability is improved, but device volume and drive power requirements increase
Solution Approach 1:
The invention extracts and eliminates the storage channel from the system by using the screw conveyor shaft itself as the sealing element. The shaft passes directly through the partition wall between chambers, and ash accumulates around it to provide sealing, removing the need for a separate storage channel component.
Solution Approach 2:
The screw conveyor shaft serves multiple functions: it conveys ash from the combustion chamber to the collection chamber, and simultaneously acts as the sealing element for gas-tight closure of the partition opening. This eliminates the need for separate sealing mechanisms or storage channels.
2Reliability
If a storage channel and ash compaction process are used to achieve gas-tight sealing, then sealing reliability is improved, but drive power requirements increase
Solution Approach 1:
The invention extracts and eliminates the storage channel from the system by using the screw conveyor shaft itself as the sealing element. The shaft passes directly through the partition wall between chambers, and ash accumulates around it to provide sealing, removing the need for a separate storage channel component.
Solution Approach 2:
The ash material itself provides the sealing function by accumulating around the screw conveyor shaft in the opening. The system uses its own operational material (ash) to achieve sealing, eliminating the need for external compaction mechanisms or separate sealing systems.
3Device complexity
If a storage channel is eliminated, then device complexity is reduced, but sealing reliability may be compromised
Solution Approach 1:
The screw conveyor shaft serves multiple functions: it conveys ash from the combustion chamber to the collection chamber, and simultaneously acts as the sealing element for gas-tight closure of the partition opening. This eliminates the need for separate sealing mechanisms or storage channels.
Solution Approach 2:
The ash material itself provides the sealing function by accumulating around the screw conveyor shaft in the opening. The system uses its own operational material (ash) to achieve sealing, eliminating the need for external compaction mechanisms or separate sealing systems.
Data Source
Figure 1
Figure 2
AI summary
The heating device has a burner (3), an ash chamber (2), a collection chamber (4) for fly ash, a screw conveyor (9) and another screw conveyor (8), where the burner is charged with denomination fuel, particularly pellets. The burner is arranged in the ash chamber, where a sealing flap (11) is provided for direct closure of a through opening (14).