Multi-orifice Burner Moderator Gas for Partial Oxidation
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Solution Overview
Problem
Existing multi-orifice burner processes for partial oxidation of liquid hydrocarbon fuels face issues with burner damage and shorter lifetimes, particularly when operating at higher pressures or processing viscous hydrocarbon feeds with high volatile components, due to pre-ignition near the burner tips and frequent flame mode changes.
Innovation Solution
A process using a multi-orifice burner with separate passages for hydrocarbon, oxidizer gas, and moderator gas, where the moderator gas has a higher exit velocity than the oxidizer gas, effectively breaking up the hydrocarbon feed and reducing reactions at the burner tips, thereby minimizing damage and stabilizing the flame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the burner operates at higher outlet pressure or processes viscous hydrocarbon feeds with high volatile components, then the production capacity and flexibility are improved, but burner damage occurs and lifetime is reduced due to pre-ignition near burner tips
Solution Approach 1:
A moderator gas stream is introduced as an intermediary substance between the hydrocarbon feed and oxidizer gas. This moderator gas flows through a separate passage in the multi-orifice burner and acts as a buffer that prevents direct contact and harmful reactions between the hydrocarbon and oxidizer at the burner tips, thereby preventing pre-ignition and burner damage while maintaining high production capacity
Solution Approach 2:
The burner is segmented into multiple separate passages: one for hydrocarbon feed, one for oxidizer gas, and one for moderator gas. This segmentation allows each gas stream to be controlled independently and prevents harmful interactions between the hydrocarbon and oxidizer at the burner tips, resolving the contradiction between high productivity and burner reliability
2Productivity
If the burner operates at higher outlet pressure, then the production capacity is improved, but frequent flame mode changes occur indicating unstable operation and increased burner damage
Solution Approach 1:
The moderator gas serves as a stabilizing intermediary that prevents direct interaction between hydrocarbon and oxidizer at the burner tips. This mediation eliminates the conditions that cause frequent flame mode changes, ensuring stable operation even at high outlet pressures and maintaining consistent flame characteristics throughout operation
3Adaptability or versatility
If viscous hydrocarbon feeds are processed, then the versatility of the burner is improved, but pre-ignition occurs near burner tips due to higher feed temperatures required
Solution Approach 1:
The moderator gas acts as a protective intermediary that prevents pre-ignition of the hydrocarbon feed near the burner tips. This allows viscous hydrocarbon feeds to be processed at the required higher temperatures without causing harmful pre-ignition reactions, thereby maintaining versatility while eliminating the harmful effect
Solution Approach 2:
The harmful pre-ignition reactions are extracted and eliminated by introducing the moderator gas stream that separates the hydrocarbon feed from the oxidizer gas. This removal of the harmful interaction allows versatile processing of viscous feeds without the associated pre-ignition damage
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 significantly improves burner lifetime and reduces temperature fluctuations, leading to less burner damage and more stable operation, while allowing for flexible adjustment of combustion velocity and soot particle size for easier separation in downstream equipment.
Implementation Method 1
The moderator gas will break up the hydrocarbon feed and act as a moderate such that reactions in the recirculation zone at the burner tips are avoided
Implementation Method 2
a process for partial oxidation of a liquid, hydrocarbon-containing fuel such as oil residue wherein an oxygen-containing gas which is applied as an oxidiser
Implementation Method 3
autothermically a gaseous stream containing synthesis gas is produced under appropriate conditions
Data Source
AI summary
The invention is directed to a process to prepare a mixture of hydrogen and carbon monoxide by performing a partial oxidation on a hydrocarbon feed using a multi-orifice burner provided with an arrangement of separate passages, wherein the hydrocarbon flows through a passage of the burner, an oxidiser gas flows through a separate passage of the burner and wherein the passage for hydrocarbon feed and the passage for oxidiser gas are separated by a passage through which a moderator gas flows and wherein the exit velocity of the moderator gas is greater than the exit velocity of the oxidiser gas.