Magnetic Loop Seal Separator for Oxygen Carrier Recycling
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Solution Overview
Problem
In solid fuel chemical looping combustion (SF-CLC) systems, there is a challenge in efficiently separating and recycling oxygen carrier particles while managing the accumulation of ash, leading to increased disposal costs and inefficiencies due to the use of cheap, disposable oxygen carrier particles.
Innovation Solution
The implementation of magnetic oxygen carrier particles and a magnetic separator in a loop seal separator allows for the separation of ash from oxygen carrier particles, enabling their recycling without loss, using a duct system with downward and upward pipes and a magnetic separator to distinguish between the two, and a solid cooler to stabilize operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cheap disposable oxygen carrier particles are used, then the cost of oxygen carrier particles is reduced, but the disposal cost increases and economic efficiency deteriorates
Solution Approach 1:
The patent changes the magnetic property parameter of oxygen carrier particles by adding magnetic materials (Fe3O4, γ-Fe2O3, or magnetite) to enable magnetic separation. This allows particles to be recovered and reused instead of disposed of, resolving the contradiction between low initial cost and high disposal cost
Solution Approach 2:
The patent implements a recovery system for oxygen carrier particles using magnetic separation in the loop seal separator. The magnetic particles are separated from ash, collected, and recirculated to the oxidizer, eliminating the need for continuous disposal and purchase of new particles
2Ease of operation
If ash and oxygen carrier particles are not separated, then the operation is simple, but the oxygen carrier particles are lost and must be continuously replenished
Solution Approach 1:
The patent replaces complex mechanical separation systems with a magnetic separation system. The magnetic separator uses magnetic field forces to separate magnetic oxygen carrier particles from non-magnetic ash, achieving effective separation while maintaining operational simplicity
Solution Approach 2:
The patent introduces magnetic material as an intermediary property that enables separation. By making oxygen carrier particles magnetic while ash remains non-magnetic, the system achieves automatic separation through magnetic field interaction without complex mechanical mechanisms
3Loss of substance
If magnetic oxygen carrier particles are used with magnetic separator, then particle recycling is achieved, but the device complexity increases
Solution Approach 1:
The patent integrates the magnetic separator functionality into the existing loop seal separator, which already handles particle circulation. The loop seal separator performs both its original function of maintaining pressure differential and the additional function of magnetic separation, reducing overall system complexity
Solution Approach 2:
The patent combines the magnetic separation function with the loop seal separator structure. The magnetic separator is integrated within the loop seal separator, merging two functions into one device and avoiding the need for a completely separate separation system
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 approach enables a circulation operation without oxygen carrier particle loss and ensures stable operation of the loop seal separator, allowing for efficient recycling of magnetic oxygen carrier particles and removal of ash, thereby reducing disposal costs and improving economic efficiency.
Implementation Method 1
a magnetic separator to separate the ash from the mixture of ash and oxygen carrier particles, flowing into the duct, by using magnetic material
Implementation Method 2
a duct into which the ash and magnetic oxygen carrier particles discharged from a reducer flow
Data Source
AI summary
The present invention relates to a CLC and operation method thereof equipped with a loop seal separator using magnetic oxygen carrier particles and a magnetic separator. And more particularly, the present invention relates to a loop seal separator using magnetic oxygen carrier particles and a magnetic separator, wherein the loop seal separator comprises a duct into which the ash and magnetic oxygen carrier particles, discharged from a reducer, flow; a magnetic separator to separate the ash from the magnetic oxygen carrier particles, flowing into the duct, by magnetic material; an ash discharge pipe to discharge the ash, separated by the magnetic separator; and an oxygen-carrier-particle discharge pipe to encourage the magnetic oxygen carrier particles, separated by the magnetic separator, to flow into an oxidizer.