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Oxygen-rich dry gas supply device for blast furnace iron-making

A technology for oxygen-enriched dry gas and supply equipment, which is applied to blast furnaces, blast furnace details, blast furnace parts, etc., can solve the problems of high energy consumption in the operation of the equipment system, large investment in power equipment, and large investment, so as to reduce preparation energy consumption, Optimizing equipment investment and improving economic efficiency

Inactive Publication Date: 2012-12-05
李东林 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen supply process still has the following disadvantages: due to the use of air compressors or vacuum units in the process of preparing oxygen enrichment, the energy consumption of oxygen enrichment preparation is relatively large, and if the method of adding oxygen enrichment after the blast furnace blower is used, the oxygen pressure needs to be increased Machine boosting, energy consumption and investment need to be further improved, and the entire device system requires high energy consumption, equipment occupies a large area, and requires a large investment
Therefore, the oxygen-enriched combustion device still has the disadvantages of large power equipment investment and high energy consumption, and is not suitable for blast furnace ironmaking

Method used

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  • Oxygen-rich dry gas supply device for blast furnace iron-making
  • Oxygen-rich dry gas supply device for blast furnace iron-making

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An oxygen-enriched dry gas supply device for blast furnace ironmaking, comprising a blast furnace blower, a precooler, an air cooler, a PSA oxygen generating unit and a hot blast stove, characterized in that: the blast furnace blower is connected to a precooler, precooling The air cooler is connected to the air cooler, the air cooler is connected to the PSA oxygen unit, the PSA oxygen unit is connected to the pre-cooler, and the pre-cooler is connected to the hot blast stove; the air pressurized by the blast furnace blower is cooled by the pre-cooler and the air cooler, and then enters the PSA The oxygen-generating unit obtains oxygen-enriched dry gas, and the obtained oxygen-enriched dry gas returns to the precooler for heating, and then enters the hot blast stove and sends it to the blast furnace for combustion support.

[0029] The gauge pressure of the outlet air of the blast furnace blower is 0.25MPa.

[0030] The PSA oxygen production unit adopts multiple adsorpti...

Embodiment 2

[0036] Same reason, as embodiment 1.

[0037] An oxygen-enriched dry gas supply device for blast furnace ironmaking, comprising a blast furnace blower, a precooler, an air cooler, a PSA oxygen generating unit and a hot blast stove, characterized in that: the blast furnace blower precooler, precooler Connect the air cooler, the air cooler is connected to the PSA oxygen production unit, the PSA oxygen production unit is connected to the pre-cooler, and the pre-cooler is connected to the hot blast stove; The air temperature in front of the unit is 85°C and the humidity is 10g / m 3 , the dew point temperature is -10°C, the oxygen enrichment is 23%, and the humidity is 1.92 g / m 3 The oxygen-enriched dry gas obtained is returned to the precooler for heating, and then enters the hot blast stove and is sent to the blast furnace for combustion support.

[0038] The air pressurized by the blast furnace blower is cooled and lowered by the air cooler and the pre-cooler, and the cooled ga...

Embodiment 3

[0040] The same reason, as mentioned above.

[0041] An oxygen-enriched dry gas supply device for blast furnace ironmaking, comprising a blast furnace blower, a cooler, a gas-water separator, a PSA oxygen generating unit and a hot blast stove, characterized in that: the blast furnace blower is connected to a precooler, and the precooler The cooler is connected to the air cooler, the air cooler is connected to the PSA oxygen production unit, the PSA oxygen production unit is connected to the precooler, and the precooler is connected to the hot blast stove; the gauge pressure of the blast furnace blower outlet air is 0.45Mpa, and the air entering the PSA The air temperature before the oxygen unit is 75°C and the humidity is 8g / m 3 , the dew point temperature is -20°C, the oxygen enrichment is 22%, and the humidity is 0.76 g / m 3 The oxygen-enriched dry gas obtained is returned to the precooler for heating, and then enters the hot blast stove and is sent to the blast furnace for ...

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Abstract

The invention relates to the technical field of blast furnace iron-making process, and provides an oxygen-rich dry gas supply device adapting to a blast furnace iron-making smelting process. The oxygen-rich dry gas supply device is characterized in that a blast furnace blower is connected with a precooler; the precooler is connected with an air cooler; the air cooler is connected with a PSA (Pressure Swing Adsorption) oxygen making unit; the PSA oxygen making unit is connected with the precooler; and the precooler is connected with a hot air furnace. According to the device, equipment used in the conventional blast furnace iron-making process is fully utilized, and air supercharged at the outlet of the blast furnace blower is subjected to pressure varying adsorption for directly preparing oxygen-rich dry gas, so that a way for preparing the oxygen-rich dry gas by externally adding rich oxygen in the prior art is changed; and the device has the advantages of small equipment investment and low running energy consumption.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking technology, in particular to a supply device for directly making compressed air into oxygen-enriched dry gas which can be used in blast furnace ironmaking. Background technique [0002] In the blast furnace ironmaking process, oxygen-enriched blast technology and dehumidification blast technology are widely used intensified smelting technologies. Among them, the oxygen-enriched blast is mainly to add industrial oxygen during the blast to increase the oxygen content in the blast, so that the oxygen-enriched content in the gas is ≥ 21%, which improves the smelting intensity and the combustion temperature at the hearth tuyeres, thereby increasing the blast furnace Yield and reduced focal ratio. The dehumidification blast is to reduce the humidity of the combustion air entering the blast furnace to the value required by the best operation and keep it stable by removing the moisture i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00C21B7/00
Inventor 李东林郎治王华金苏为民马光俊
Owner 李东林
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