Moving Bed Reactor Particles as Integrated Heat Carrier and Filter
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Solution Overview
Problem
Existing thermal treatment processes face challenges in achieving high liquid yields and scalability due to limitations in heat transfer rates, parasitic energy loads, and the inability to effectively separate and recover char products, while also requiring complex and costly gas cleanup systems to remove particulates and tars from gas streams.
Innovation Solution
A moving bed reactor system where the moving bed reactor particles serve as both a heat carrier and a filter, providing thermal energy for thermal treatment reactions and removing solid particulates, with a design that includes a housing with sloping bottom walls and removal augers to facilitate efficient heat transfer and filtration, allowing for high heat transfer rates and integrated gas cleanup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a traditional thermal treatment reactor is used, then thermal treatment reactions can be performed, but heat transfer rates are limited and parasitic energy loads increase
Solution Approach 1:
The patent combines the fluidized bed reactor and the filter into a single integrated device. The filter media is positioned within the reactor chamber, allowing simultaneous thermal treatment and particulate removal without requiring separate equipment. This merging eliminates the need for additional energy-consuming equipment while maintaining effective heat transfer rates.
Solution Approach 2:
The filter media serves multiple functions: it acts as a particulate removal filter, a heat transfer surface, and a support structure for the reaction process. This multi-functionality reduces the number of separate components needed, thereby reducing parasitic energy loads associated with operating multiple independent systems.
2Object-affected harmful factors
If a separate gas cleanup system is added, then particulates and tars can be removed from gas streams, but device complexity and cost increase
Solution Approach 1:
The filtering function is integrated directly into the reactor chamber by positioning filter media within the reaction zone. This eliminates the need for separate downstream filtration equipment, reducing system complexity while maintaining effective particulate and tar removal from the gas stream.
Solution Approach 2:
The filter media performs dual functions as both a reaction surface and a gas cleaning element. By making the filter multi-functional, the system avoids the complexity of separate cleanup systems while achieving effective removal of harmful particulates and tars.
3Productivity
If faster heating rates are implemented, then liquid yields increase, but temperature control becomes more difficult
Solution Approach 1:
The filter media provides localized heat transfer surfaces within the reactor chamber, enabling rapid and uniform heat distribution to the feedstock. This localized heat transfer capability allows for faster heating rates while maintaining precise temperature control through the large surface area available for heat exchange.
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 system achieves efficient thermal treatment with high liquid yields, scalability, and reduced parasitic energy loads, while integrating gas cleanup within the reactor to minimize secondary reactions and increase product recovery, thus improving the economic feasibility and efficiency of the process.
Implementation Method 1
moving bed reactor particles functioning as both a moving reactor bed and a heat carrier to provide thermal energy for thermal treatment reactions
Implementation Method 2
the moving reactor bed which acts to filter solid contaminants from the hot gas
Implementation Method 3
the hot gas expanding and pushing upward and outward through the downward flowing moving reactor bed
Implementation Method 4
thermal treatment reactions, such as...fast pyrolysis processes
Data Source
AI summary
A moving bed gasification/thermal treatment reactor includes a geometry in which moving bed reactor particles serve as both a moving bed filter and a heat carrier to provide thermal energy for thermal treatment reactions, such that the moving bed filter and the heat carrier are one and the same to remove solid particulates or droplets generated by thermal treatment processes or injected into the moving bed filter from other sources.