Dual Circulating Fluidized Bed Reactor with Hydraulic Link
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Solution Overview
Problem
Existing gas-solid reactor systems with a combination of circulating and stationary fluidized beds face limitations in scalability and efficiency due to large reactor cross-section requirements and poor gas-solid contact in stationary beds, leading to potential gas leakage and increased mechanical stress on particles.
Innovation Solution
A fluidized bed reactor system comprising at least two circulating fluidized beds connected via a particle line, allowing independent adjustment of solids transport and optimized gas-particle contact, eliminating the need for a stationary bed and reducing mechanical stress on particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stationary fluidized bed is used in the system, then robust and particle-friendly operation is achieved, but the reactor cross-section becomes very large and gas-solid contact is poor
Solution Approach 1:
The system divides the fluidized bed into multiple compartments (first fluidized bed compartment and second fluidized bed compartment) that are hydraulically connected. This segmentation allows each compartment to function as a circulating fluidized bed with independent gas spaces, achieving robust operation without requiring a large stationary bed cross-section. The hydraulic connection between compartments enables particle circulation while maintaining compact dimensions.
Solution Approach 2:
The invention transitions from a two-dimensional stationary bed configuration to a three-dimensional circulating fluidized bed system with hydraulic connections between compartments. This dimensional change allows particles to circulate vertically and horizontally through the system, achieving good gas-solid contact in a compact volume rather than requiring a large horizontal cross-section.
2Object-affected harmful factors
If a stationary fluidized bed is used to define solid whereabouts, then particle stress is reduced, but gas in the bubble phase is poorly brought into contact with the solid and gas may slip through
Solution Approach 1:
The system employs dynamic circulating fluidized beds in both compartments instead of a static stationary bed. The hydraulic connection between compartments creates dynamic particle circulation patterns that enhance gas-solid contact while maintaining particle-friendly operation. The circulating nature of the beds allows continuous mixing and contact between gas and solid phases, preventing gas slip-through while reducing mechanical stress on particles.
3Reliability
If two rapidly fluidized fluidized bed reactors are used, then gas-solid contact is optimized, but control of solid whereabouts requires complex control technology and solids must be discharged and separated twice
Solution Approach 1:
The invention merges the functions of two circulating fluidized bed reactors with a hydraulic connection between them, creating a unified system where solids circulate from the first compartment to the second and back. This combination achieves optimized gas-solid contact in both compartments while using a single hydraulic connection system to control solid whereabouts, reducing the need for multiple separate control technologies and separation devices.
Solution Approach 2:
The hydraulic connection acts as an intermediary between the two fluidized bed compartments, enabling controlled solid circulation without requiring complex control technology. This intermediary system allows solids to move between compartments while maintaining independent gas spaces, simplifying the overall control architecture compared to using two completely independent circulating beds.
4Productivity
If the system is scaled up for large plant capacities, then production capacity increases, but stationary fluidized beds require very large cross-sections that are impractical
Solution Approach 1:
The invention enables scaling to large plant capacities by utilizing vertical and hydraulic circulation dimensions rather than simply increasing horizontal cross-section. The circulating fluidized bed configuration with hydraulic connections allows particles to circulate through a compact volume, achieving large processing capacities without requiring impractically large reactor cross-sections.
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 enables robust, particle-friendly operation with high global solids circulation rates, improved gas-particle contact, and reduced risk of gas leakage, suitable for large-scale processes like chemical looping and thermochemical conversions.
Implementation Method 1
a fluidized bed or a fluidized bed in which particles are fluidized by a fluid
Implementation Method 2
a centrifugal or gravity separator arrangement
Implementation Method 3
a centrifugal or gravity separator arrangement
Implementation Method 4
Fluidized siphons or fluidized connecting channels or fluidized chutes
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a fluidized bed reactor system made up of at least two fluidized bed reactors, comprising at least one main reactor (1) in the form of a circulating fluidized bed and a secondary reactor (2) in the form of a circulating fluidized bed, and also a particle line comprising a particle separator for transporting fluidized bed particles from the main reactor into the secondary reactor, characterized in that, in the lower region of the respective reactor, a line (10) connects the secondary reactor (2) to the main reactor (1) for transporting fluidized bed particles.