Gasification Reactor Ignition via Segmented Burner Array
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Solution Overview
Problem
High-performance entrained flow gasification reactors above 200 MW require high thermal output for ignition and pilot burners to achieve reliable and instantaneous ignition, which is inefficient and costly.
Innovation Solution
A method using a combination or multiple burner array with a centrally disposed ignition and pilot burner, ignited substoichiometrically with fuel gas, to reduce the thermal output needed for ignition by pneumatically supplying pulverized fuels with an oxygen-containing gasification agent, allowing for reduced ignition heat requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single high-power ignition and pilot burner is used, then reliable and instantaneous ignition is achieved, but the thermal output performance requirement becomes excessively high and costly
Solution Approach 1:
The single high-power ignition and pilot burner is segmented into multiple lower-power burners (at least two ignition burners and two pilot burners). Each burner handles a portion of the ignition task, collectively achieving the required ignition reliability without any single burner needing excessive thermal output performance.
2Power
If multiple burners are used instead of a single burner, then the thermal output performance is reduced, but the device complexity increases
Solution Approach 1:
The ignition burners and pilot burners are merged into a coordinated burner array system where ignition burners and pilot burners work in conjunction. The ignition burners provide the primary ignition function while pilot burners provide continuous monitoring and stabilization, creating a synergistic system that achieves reliable ignition with reduced individual burner power requirements.
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 method reduces the need for ignition heat by 60% with a combination burner and up to 90% with a multiple burner array, enabling efficient and instantaneous startup of high-performance gasification reactors.
Implementation Method 1
The ignition and pilot burner is ignited substoichiometrically with a fuel gas and the oxygen-containing gasification means
Implementation Method 2
autothermal partial oxidation of pulverized fuels such as lignite and hard coal, petroleum coke, solid grindable carbon-containing residues
Implementation Method 3
pneumatically supplied to the combination burner with an oxygen-containing gasifying agent
Implementation Method 4
at operating pressures of up to 100 bar
Implementation Method 5
temperatures ranging between 1,200° C. and 1,800° C.
Data Source
AI summary
A method for starting high-performance entrained flow gasification reactors with a combination burner or a plurality of pulverized fuel burners, and an ignition and pilot burner. The ignition and pilot burner is ignited, substoichiometrically with fuel gas and a gasifier containing free oxygen. The reactor is brought to the pressure intended and a flow of a fuel gas is supplied with a partial flow of the gasification agent at a substoichiometric ratio through the fuel lines leading to the fuel burner and ignited by the flame of the ignition and pilot burner with a partial flow of the gasification agent. Next, the pulverized fuel is supplied together with a further oxygen-containing gasifying agent through the supply lines to the pulverized fuel burner and is ignited by the flame of the ignition and pilot burner and by the fuel gas flames of the combustible gas generated at the pulverized fuel burner.