Combusting device for low nitrogen combustion of classification pre-mixed swirling flow

Abstract

The invention relates to a combusting device for low nitrogen combustion of a classification pre-mixed swirling flow, and effectively realizes the combustion purposes of classification pre-mixed combustion, flame stabilization combustion and temperature control combustion among coal gas, air, auxiliary air, and steam. Four pipe bodies are mounted in a stepped sleeving manner; an air inlet pipe is arranged at the closed end of an outer layer air annular passage; an auxiliary air inlet pipe is arranged at the closed end of an inner layer auxiliary air annular passage; a coal gas annular passage is arranged at the middle, and a coal gas inlet pipe is arranged at the closed end of the coal gas annular passage; swirling flow supporting pieces are separately arranged in outlet sections of the passages; centers of the four pipe bodies are steam passages; a pre-mixed pre-combustion chamber communicating with a combustion gas flow outlet is arranged in the outer pipe body; a conic bluff body with a contracted duct in the center is arranged at the outlet of the auxiliary air annular passage. According to the combustion device disclosed by the invention, the generation of nitrogen oxides during the combustion process is effectively controlled, the combustion temperature is reasonably controlled, and the emission capacity of the nitrogen oxides is effectively reduced; therefore, the fuel is saved, the investments are saved, and pollution to atmospheric environment is reduced.

Description

technical field [0001] The invention relates to a combustion device for heat utilization equipment of industrial furnaces and kilns, and is especially suitable for a combustion device for staged premixed swirling low-nitrogen combustion used in boilers and heating furnaces (or hot blast stoves) burning gas fuel. Background technique [0002] At present, in consideration of energy saving and environmental protection, industrial furnaces require combustion devices to achieve efficient and controllable complete combustion under different fuels and different gases, and at the same time, it is also required to effectively reduce the formation of nitrogen oxides (NOx) during the combustion process. amount, in order to achieve the ultimate goal of high efficiency, energy saving and environmental protection. For this reason, in addition to achieving fast and uniform mixing and stable combustion in the structure of industrial furnace burners, it should also be able to adapt to differ...

AI Technical Summary

Problems solved by technology

Looking at the conventional burners currently used in various industrial furnaces, it is obvious that there are various structural problems caused by design concept problems, which will inevitably lead to uneven mixing between gas and air and incomplete combustion

When it comes to low-nitrogen burners, they are all characterized by staged combustion. Due to too many considerations in details, the structure tends to be complicated, and the technical effect is far from meeting the technical requirements of environmental protection.

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