Gasification Reactor Injection Device Thermal Shielding
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Solution Overview
Problem
Existing gasification systems in IGCC plants face challenges with the short lifespan of injection devices due to exposure to high temperatures from exothermic reactions and ineffective injection of recycled CO2, which hampers syngas production.
Innovation Solution
The method and apparatus involve assembling a gasification reactor with a reactant injection device that includes a fluid injection conduit with multiple passages, which circumscribes the reactant injection member to shield it from heat and facilitate controlled temperature and reaction kinetics, thereby extending the device's lifespan and improving syngas production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If injection devices are exposed to high temperatures from exothermic reactions, then syngas production is facilitated, but the service life of injection device components is reduced
Solution Approach 1:
A fluid conduit is introduced as an intermediary component between the exothermic reaction zone and the injection device components. The conduit circulates a fluid through it, creating a thermal barrier that mediates the heat transfer from the high-temperature reaction zone to the injection device, thereby protecting components while maintaining syngas production capability
Solution Approach 2:
The high temperatures from exothermic reactions, which normally degrade components, are converted into a beneficial effect by using them to heat a fluid circulating through the conduit. This fluid then serves as a cooling medium for the injection device components, transforming the harmful thermal energy into a useful cooling function that extends component service life
2Productivity
If recycled CO2 is injected into the gasification reactor, then syngas production is facilitated, but the injection effectiveness is insufficient without proper temperature control
Solution Approach 1:
The invention changes the temperature parameter of the injected CO2 by circulating fluid through the conduit that circumscribes the injection device. This temperature control modifies the state of the injected CO2, optimizing its reactivity and injection effectiveness for syngas production while preventing thermal degradation of the injection components
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 extends the service life of injection device components, reduces maintenance costs, and enhances syngas production by controlling temperature and reaction kinetics within the reactor.
Implementation Method 1
The injection devices include at least one fluid conduit disposed about the reactant injection device to facilitate shielding the device from an environment within the gasification reactor proximate to the device. The environment includes heat that is a result of exothermic reactions within the reactor.
Implementation Method 2
The injection system may include at least one injection device that is partially exposed to such exothermic reactions and the associated high temperatures.
Data Source
AI summary
A method of assembling a gasification reactor includes extending at least one reactant injection member into the gasification reactor. The method also includes extending at least one fluid injection conduit including a plurality of fluid injection passages defined therein into the gasification reactor. At least a portion of the at least one fluid injection conduit circumscribes at least a portion of the at least one reactant injection member.