Ammonia gas combustion system based on catalytic coupling combustion and intelligent regulation and control and control method

CN120907142APending Publication Date: 2025-11-07CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Application Number
CN202510953656.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-10
Publication Date
2025-11-07

AI Technical Summary

Technical Problem

Existing industrial ammonia combustion technology relies on externally supplied hydrogen systems, which pose safety hazards due to high-pressure storage and transportation. Fixed staged burners have poor secondary air mixing effects, leading to unstable ammonia combustion, high NOx emissions, and ineffective utilization of waste heat from furnace exhaust gases.

Method used

An ammonia combustion system based on catalytic coupling combustion and intelligent control is adopted, including a low-temperature catalytic decomposition module, a temperature sensor, an ammonia decomposition rate detection module, a controller, and a secondary air supply component. Ammonia is thermally decomposed and mixed through nickel-based porous catalyst rods, and the heat of the furnace flue gas is used for pretreatment. The secondary air ratio and mixing position are adjusted by the intelligent controller, and NOx and NH3 in the exhaust gas are detected to optimize the combustion process.

Benefits of technology

It improves the stability and efficiency of ammonia combustion, reduces NOx emissions, utilizes waste heat from furnace tail gas, and solves the problems of high-pressure storage and transportation safety hazards and poor mixing effect.

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Abstract

The invention relates to the technical field of fuel combustion, in particular to an ammonia gas combustion system based on catalytic coupling combustion and intelligent regulation and control and a control method. The pretreatment unit comprises a low-temperature catalytic decomposition module, a temperature sensor, an ammonia decomposition rate detection module, a controller, a primary air inlet and a secondary air supply assembly, the combustion chamber is connected with the low-temperature catalytic decomposition module, and the temperature sensor is installed on the low-temperature catalytic decomposition module; the ammonia decomposition rate detection module is connected with an ammonia gas outlet of the low-temperature catalytic decomposition module; in this way, the problems that in the prior art, an industrial ammonia combustion technology depends on an external hydrogen supply system, and high-pressure storage and transportation potential safety hazards exist are solved; meanwhile, a fixed staged combustor is poor in secondary air mixing effect, so that ammonia combustion is unstable, and NOx emission is high; and a large amount of kiln tail gas waste heat is not effectively utilized.
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