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A method and device for efficiently utilizing coal gas output from a smelting reduction furnace

A reduction furnace and coal gas technology, which is applied in the field of efficient utilization of coal gas output from smelting reduction furnaces, can solve problems such as low-value utilization, and achieve the effects of energy saving, emission reduction, reduction metallization rate, and quality improvement

Active Publication Date: 2017-01-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the coal gas output from the smelting reduction furnace is mainly used for CCPP power generation, which is a low-value utilization of coal gas

Method used

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  • A method and device for efficiently utilizing coal gas output from a smelting reduction furnace
  • A method and device for efficiently utilizing coal gas output from a smelting reduction furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A smelting reduction furnace outputs coal gas A, whose composition is shown in Table 1. NaOH lye is absorbed through the bubble tower. The diameter of the bubble tower is 3 meters and the height is 15 meters. There are 12 distribution plates in the tower. The diameter is 2.8 meters, and the gas and lye flow countercurrently to achieve full absorption. The composition is shown in Table 2. It is pressurized to 0.4MPa by 3 sets of D800 gas pressurizers, and then heated by a JDK type gas heater to 970°C, spray 2500m 3 Blast furnace, the amount of injected gas is 250,000m 3 / h, the lye that absorbs the output gas A of the smelting reduction furnace is passed into CO 2 Regeneration tower, the regeneration tower is a foam tower, which uses saturated steam for regeneration. The diameter of the regeneration tower is 3 meters, and the height is 17 meters. There are 13 distribution plates in the tower, and the diameter of the distribution plate is 2.8 meters. Then it is passed i...

Embodiment 2

[0053] A smelting reduction furnace outputs coal gas B, whose composition is shown in Table 1. KOH lye is absorbed through the bubble tower. The diameter of the bubble tower is 3 meters and the height is 15 meters. There are 12 distribution plates in the tower. The diameter is 2.8 meters, and the gas and lye flow countercurrently to achieve full absorption. The composition is shown in Table 2. It is pressurized to 0.45MPa by 3 sets of D800 gas pressurizers, and then heated by a JDK type gas heater To 1000℃, spray 2000m 3 Blast furnace, the amount of injected gas is 200,000m 3 / h, the lye that absorbs the output gas B of the smelting reduction furnace is passed into CO 2 Regeneration tower, the regeneration tower is a foam tower, which uses saturated steam for regeneration. The diameter of the regeneration tower is 3 meters, and the height is 17 meters. There are 13 distribution plates in the tower, and the diameter of the distribution plate is 2.8 meters. Then it is passed i...

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Abstract

The present invention relates to a method and an apparatus for outputting coal gas by effectively utilizing a melting reduction furnace. According to the present invention, based on the high CO content and the high H2 content in the coal gas output by the melting reduction furnace, the little impurity gas contained in the coal gas, and the further coke use reduction during the production process of the blast furnace, the melting reduction coal gas is subjected to chemical adsorption so as to further increase the reduction gas content in the coal gas, and the prepared coal gas is sprayed into the blast furnace so as to utilize the melting reduction coal gas in a high value manner, reduce the melting reduction production cost, reduce the coke use proportion of the blast furnace, and recycle the removed CO2 gas, such that the cost of the blast furnace production is reduced, the CO2 discharge of the blast furnace is reduced, the environment management is easily achieved, and the great environment benefits are provided.

Description

technical field [0001] The invention belongs to the high-efficiency utilization of coal gas and CO 2 The technical field of energy saving and emission reduction specifically relates to a method and a device for efficiently utilizing the coal gas output from a smelting reduction furnace. Background technique [0002] The smelting reduction process is the only new industrial smelting reduction ironmaking process at present. It uses non-coking coal as the main fuel and only uses a small amount of coke to produce high-quality molten iron equivalent to the blast furnace, omitting the indispensable coking and sintering of the traditional blast furnace The process greatly reduces the pollution to the environment, which is in line with the strategy of sustainable development. The practice of the smelting reduction process in Baosteel for more than 4 years shows that the smelting reduction process still needs to be improved in many aspects, and there is still a lot of room for impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00C21B5/00
CPCY02P10/122
Inventor 王玉明胡德生彭新徐万仁
Owner BAOSHAN IRON & STEEL CO LTD
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