Blast oxygen enrichment mixing energy-saving device of blast furnace

A blast furnace blast and energy-saving device technology, applied to blast furnace details, blast furnaces, blast furnace parts, etc., can solve the problems of high investment and operating costs of oxygen compressor equipment, and achieve the effects of simple structure, convenient maintenance, and broad market prospects

Active Publication Date: 2013-12-25
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Blast oxygen enrichment mixing energy-saving device of blast furnace

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Embodiment Construction

[0009] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0010] Such as figure 1 As shown, a blast furnace blast and oxygen-enriched mixing energy-saving device includes a cold air pipe 1, a receiving chamber 6, a mixing chamber 7, and an expansion chamber 8, which are sequentially connected from front to back. The distribution loop 5 passes through a branch pipe 3 with a nozzle 4 from The cold air duct 1 is inserted into the receiving chamber 6, the oxygen duct 2 is connected to the inlet of the distribution loop 5, and the cold air blown by the blast furnace blower enters from the rear of the cold air duct 1. The gas pressure P1 of the blast furnace blast is greater than the oxygen pressure P2. The blast furnace blast pressure P1 is greater than 0.15MPa, and the oxygen pressure is less than 0.1MPa. The blast furnac...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/00
Inventor 石伟陈乐钱卫强
Owner CISDI ENG CO LTD
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