Friction Heated Pyrolysis Unit Biomass Compaction Sealing
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Solution Overview
Problem
Existing friction heated pyrolysis units require complex sealing constructions to prevent oxygen exposure and separate exhaust gas streams, which complicates the pyrolysis process and increases construction costs, while also not efficiently managing heat reuse and feed particle size reduction.
Innovation Solution
A friction heated pyrolysis unit with a housing containing a rotatably mounted friction wheel, a guiding assembly with tubular structures to compact biomass, and a heat exchange system, which maintains airtight sealing and separates gas streams without additional sealing structures, using conveyors to compact biomass and generate thermal energy for pyrolysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex sealing constructions are used to prevent oxygen exposure and separate exhaust gas streams, then airtight sealing is achieved, but device complexity increases
Solution Approach 1:
The biomass feed material itself serves as the sealing element against the friction wheel, eliminating the need for separate sealing constructions. The compacted biomass maintains contact with the friction wheel surface, creating an airtight barrier that prevents oxygen ingress and separates gas streams while the system operates
Solution Approach 2:
The system creates an oxygen-deficient environment within the housing by using the biomass feed stream to seal against the friction wheel, effectively creating an inert atmosphere for pyrolysis without requiring complex mechanical sealing systems
2Use of energy by moving object
If friction heating is used to generate thermal energy for pyrolysis, then energy consumption is reduced, but thermal energy loss increases
Solution Approach 1:
The system utilizes the phase transition and thermal decomposition characteristics of biomass during pyrolysis, where the thermal energy generated by friction heating is efficiently transferred to the compacted biomass material, minimizing thermal losses through the controlled thermal breakdown of organic materials
Solution Approach 2:
The continuous contact and friction between the rotating wheel and compacted biomass maintains continuous heat generation and transfer, ensuring that thermal energy is consistently applied to the pyrolysis process without interruption or significant loss
3Power
If conveyor compaction is applied to biomass, then thermal energy generation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The system uses dynamic compaction through the rotating conveyor mechanism, where the biomass material is progressively compressed and fed against the friction wheel during rotation. This dynamic approach allows effective thermal energy generation without requiring extremely precise static positioning or uniformity of the biomass feed
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 solution simplifies the construction of pyrolysis units, reduces thermal energy loss, and effectively maintains airtight conditions and heat management, enabling efficient pyrolysis processes while minimizing the need for complex sealing and enhancing feed processing.
Implementation Method 1
the friction between the compacted biomass and the portion of the friction wheel that is in contact with the biomass creates thermal energy enough to maintain a pyrolysis process in the housing
Implementation Method 2
the housing comprises an insulating layer. Hereby, the insulating layer can reduce the thermal energy loss from the housing
Implementation Method 3
a heat exchanger (44) that is in fluid communication with the circulation channel
Data Source
Figure 1A~1D
Figure 2A~2B
Figure 3A~3C
AI summary
A friction heated pyrolysis unit (2) comprising a housing (20) and at least one rotatably mounted friction wheel (4, 4') arranged in the housing (20) is disclosed. Each friction wheel (4, 4') is attached to a shaft (8, 8') connected to a driving unit (32), wherein the pyrolysis unit (2) comprises a guiding assembly (6, 6', 24, 24') arranged and configured to transport biomass (22) into contact with the friction wheel (4, 4'). The guiding assembly (6, 6', 24, 24') comprises at least a tubular structure (6, 6') having a distal end facing the friction wheel (4, 4'). A conveyor (24, 24') is provided in each tubular structure (8, 8'). The conveyor (24, 24') is configured to transport biomass (22) towards the distal end of the tubular structure (6, 6') and hereby press the biomass (22) towards the friction wheel (4, 4') with a force large enough to compact the biomass (22) in such a manner that the friction between the compacted biomass (22) and the portion of the friction wheel (4) that is in contact with the biomass (22) creates thermal energy enough to maintain a pyrolysis process in the housing (20).