Methods for operating a combustion furnace, and methods for repairing combustion furnaces.

The combustion furnace design with dual gas supply mechanisms addresses the leakage and mixing inefficiencies by using intersecting gas injection nozzles to agitate and mix exhaust gas effectively, ensuring complete combustion.

JP2026100138APending Publication Date: 2026-06-19KUBOTA CORP
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
KUBOTA CORP
Filing Date
2024-12-09
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing combustion furnaces face issues with the leakage of exhaust gas containing unburned pyrolysis gas at the base end of gas injection nozzles in the secondary combustion chamber, leading to inefficient mixing with secondary combustion air.

Method used

A combustion furnace design with a first gas supply mechanism and a second gas supply mechanism, where the first gas injection nozzles supply secondary combustion gas along a first direction intersecting the exhaust gas flow, and the second gas injection nozzles supply secondary combustion gas at a different height, intersecting the first direction, to agitate and mix the exhaust gas effectively.

Benefits of technology

The design suppresses the bypassing of exhaust gas at the base end of the gas injection nozzles and promotes efficient mixing of exhaust gas and secondary combustion gas, ensuring complete combustion.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 2026100138000001_ABST
    Figure 2026100138000001_ABST
Patent Text Reader

Abstract

The present invention provides a combustion furnace operation method that can promote mixing of exhaust gas and secondary combustion gas even if exhaust gas flowing into the secondary combustion region slips through the base end of the gas injection nozzle. [Solution] A combustion furnace comprising: a first gas supply mechanism having multiple first gas injection nozzles arranged opposite each other across the exhaust gas flow for supplying secondary combustion gas along a first direction that intersects the flow of exhaust gas rising in the secondary combustion chamber in a plan view; and a second gas supply mechanism having multiple second gas injection nozzles arranged opposite each other across the exhaust gas flow, provided at a different height from the first gas supply mechanism and supplying secondary combustion gas to exhaust gas that is passing through and rising between multiple adjacent first gas injection nozzles or to exhaust gas before it passes through and rises, wherein when the supply amount or flow velocity of secondary combustion gas supplied from the first gas supply mechanism exceeds a predetermined value, a method for operating a combustion furnace comprising: a first gas supply mechanism having multiple first gas injection nozzles arranged opposite each other across the exhaust gas flow for supplying secondary combustion gas along a first direction that intersects the flow of exhaust gas rising in the secondary combustion chamber in a plan view; and a second gas supply mechanism having multiple second gas injection nozzles arranged opposite each other across the exhaust gas flow for supplying secondary combustion gas to exhaust gas that is passing through and rising between multiple adjacent first gas injection nozzles, provided that the supply amount or flow velocity of secondary combustion gas supplied from the first gas supply mechanism exceeds a predetermined value.
Need to check novelty before this filing date? Find Prior Art