Blast oxygen enrichment mixing energy-saving device of blast furnace

Abstract

The invention discloses a blast oxygen enrichment mixing energy-saving device of a blast furnace. The blast oxygen enrichment mixing energy-saving device is characterized by comprising a cold blast pipeline, a receiving chamber, a mixing chamber and an expanding chamber which are sequentially connected with one other from front to back, wherein a circular distribution pipe is inserted into the receiving chamber from the cold blast pipeline through a branch pipe with a nozzle, an oxygen pipeline is connected with the inlet of the circular distribution pipe, cold blast which are blown from a blast furnace blower enters from the rear part of the cold blast pipeline, and gas pressure P1 of the blast furnace blower is higher than oxygen pressure P2. According to the invention, the cold blast pressurized by the blower is mixed with oxygen with the pressure P2 being low in the blast oxygen enrichment mixing energy-saving device to meet the oxygen enrichment requirement on blast furnace ironmaking, so that the coal injection ratio of the blast furnace is improved, the ratio of coke into the furnace is reduced, the utilization factor and output of the furnace are increased, the ironmaking cost is lowered, and the emission of CO2 is decreased. The blast oxygen enrichment mixing energy-saving device does not consume energy resources, has no operation cost, has a simple structure, is convenient to maintain, achieves the aims of energy conservation and emission reduction, and has a wide market prospect.

Description

Technical field [0001] The invention belongs to the technical field of blast furnace iron-making oxygen-enriched technology, and specifically relates to a blast furnace blast and oxygen-enriched mixing device. Background technique [0002] At present, the oxygen enrichment of blast furnace adopts two methods of oxygen enrichment before the blower and oxygen enrichment after the blower. The oxygen enrichment method before the blower, for example, the two patents with Chinese patent application numbers 201010603591.3 and 201020678008.0 belong to the oxygen enrichment process and device before the blast furnace. Process and equipment limit the capacity of the blower (generally no more than 8%, otherwise, at 250 ℃, the oxygen content is high, the fan blades need to be stainless steel, etc.), the oxygen enrichment will increase the blower capacity accordingly, so equipment investment and operating costs will be Will improve. In the oxygen enrichment mode after the blower, the oxygen ...

AI Technical Summary

Problems solved by technology

Therefore, the oxygen station must be equipped with an oxygen compressor to meet the process requirements, and the equipment investment and operating costs of the oxygen compressor are relatively high.

Images