The invention discloses a combustion device and a combustion method that can realize low NOx emission from the coke oven vertical fire channel, which relates to the technical field of metallurgy. The length, width and height of the coke oven vertical fire channel are designed as a narrow and long confined space structure, and an inclined partition plate is arranged in the vertical fire channel, which can separate the combustion supporting gas into two combustion supporting gas streams, so as to hinder the rapid mixing reaction of combustion supporting gas and gas, Finally, the combustion supporting gas and fuel gas are burned at the intersection of the two gas flow axes, so that the combustion state of the vertical flue reaches the form of dispersion combustion, the maximum combustion temperature is reduced, the uniformity of heating up and down the vertical flue is significantly improved, the generation conditions of thermal NOx are destroyed, the emission of NOx in coke oven flue gas is reduced from the source, and the pressure of subsequent flue gas denitration section is reduced, It shows significant economy. In addition, the combustion device for realizing low NOx emission in the vertical fire path of the coke oven has simple structure and strong practicability.
