Device capable of effectively reducing sintering NOx emission

Abstract

The invention discloses a device capable of effectively reducing sintering NOx emission. The device comprises a sintering preheating drying furnace and a sintering ignition furnace, the furnace top of the sintering preheating drying furnace is provided with a precast beam, a preheating air channel and a preheating curtain type burner, and the preheating curtain type burner is respectively connected with a gas pipeline and a primary air pipeline; the sintering preheating drying furnace corresponds to a first air bellow and a second air bellow of a sintering air draft air bellow; the sintering ignition furnace corresponds to a third air bellow and a fourth air bellow of the sintering air draft air bellow; and an ignition curtain type burner is arranged at the top of the sintering ignition furnace and connected with the gas pipeline, the primary air pipeline and a secondary air pipeline. According to the device, the stability and uniformity of preheating and drying of a sintering mixture can be achieved, the quality of sintered ore is improved, the strength of the sintered ore is improved, the rate of finished products is increased, reduction reaction with NOx is facilitated, and conversion from fuel nitrogen to NOx is restrained.

Description

technical field [0001] The invention relates to the technical field of metallurgical sintering equipment, in particular to a device capable of effectively reducing NOx emissions from sintering. Background technique [0002] The sintering process is an important process in the production chain of iron and steel complexes. With the rapid development of the iron and steel industry, the demand for iron ore is increasing day by day. However, there are fewer and fewer rich ores that are directly put into the furnace for ironmaking, and a large amount of lean ore resources must be mined and used. Smelting lean ore directly into the furnace will deteriorate the production index of the blast furnace. The function of the sintering machine is to agglomerate the iron ore powder. The metallurgical properties of the sintered minerals are greatly improved, bringing huge economic benefits to blast furnace production. Moreover, the sintering method has strong adaptability to raw materials...

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Problems solved by technology

In this patent, because the heat source is unstable due to the fluctuation of the production process, and the device is difficult to achieve the uniformity of the hot air in the hot air hood, which affects the drying and preheating effect of the sintered material layer covered by it, it improves the air permeability and productivity. limited efficacy

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