Pure-oxygen pulverized coal entraining combustor

Abstract

The invention relates to a pure-oxygen pulverized coal entraining combustor, which comprises a pulverized coal nozzle arranged at the middle part of a combustor block, a pulverized coal feeding flue gas channel, a plurality of circular seam oxygen guns arranged at the circumference of the pulverized coal nozzle, a circular seam oxygen chamber connected to the outer ends of the plurality of circular seam oxygen guns, a central oxygen gun arranged in the pulverized coal flue gas channel and a circular seam oxygen inlet arranged on the central oxygen gun and communicated with the circular seal oxygen chamber. The length of flame of the combustor can be adjusted by adjusting flow adjusting valves on a central oxygen pipeline and a circular seam oxygen pipeline. Pulverized coal-containing flue gas is sprayed out from the pulverized coal flue gas channel, the central oxygen is sprayed out from the central oxygen gun positioned in the center of the pulverized coal flue gas channel, the pulverized coal flue gas and the central oxygen are premixed and burnt to form a stable root flame, therefore the fuel can be saved by 35 percent, the flue gas amount can be reduced by 70 percent, and nitric oxides contained in the flue gas are avoided.

Description

technical field [0001] The invention relates to a burner, in particular to a pulverized coal pure oxygen entrainment burner suitable for industrial furnaces. Background technique [0002] At present, the pulverized coal burner of industrial furnaces is mainly composed of a pulverized coal nozzle, a primary air channel leading into the pulverized coal nozzle, and a secondary air channel on the outer ring of the primary air channel. Air powder, primary air, and secondary air combustion, although they can play a combustion-supporting role, but in the actual combustion process, the real combustion-supporting agent only accounts for 21% of the volume of combustion-supporting air, oxygen, and the remaining 79% is mainly nitrogen. It takes a lot of fuel to heat nitrogen, which accounts for 79% of the combustion air volume, from the ambient temperature to the furnace temperature. This part of nitrogen will be discharged into the air with the flue gas, so the consumption of fuel and ...

AI Technical Summary

Problems solved by technology

It takes a lot of fuel to heat nitrogen, which accounts for 79% of the combustion air volume, from the ambient temperature to the furnace temperature, and this part of nitrogen will be discharged into the air with the flue gas, so the consumption of fuel and the emission of flue gas are very large

And during the combustion process, some nitrogen will form harmful nitrogen oxides with oxygen and emit them into the air, which will cause certain damage to the environment.

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