Self-reforming system and method of coke oven gas for blast furnace ironmaking

A technology of coke oven gas and blast furnace ironmaking, which is applied in the field of coal chemical industry, can solve the problems of insufficient heat and low reduction rate of blast furnaces, and achieve the effects of eliminating cracking devices, reducing investment, and making up for heat loss

Pending Publication Date: 2021-10-15
SHANXI JINNAN IRON & STEEL GRP CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using it directly will cause problems such as insufficient heat in the blast furnace and low reduction rate.

Method used

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  • Self-reforming system and method of coke oven gas for blast furnace ironmaking

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Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 The self-reforming system of coke oven gas for blast furnace ironmaking shown includes a flue gas generator 1, a heat exchanger 2, a coke oven gas self-reforming furnace 3, and a blast furnace 4; wherein, the outlet of flue gas generator 1 is transported by gas The pipeline is connected to the first inlet of the heat exchanger 2, the second inlet of the heat exchanger 2 is connected to the gas pipeline, the outlet of the heat exchanger 2 is connected to the first inlet of the coke oven gas self-reforming furnace 3, and the coke oven gas The second inlet of the self-reforming furnace 3 is connected to the oxygen delivery pipeline, and the outlet of the coke oven gas self-reforming furnace 3 is connected to the blast furnace 4 . The gas pipelines are all lined with heat-insulating and refractory materials.

Embodiment 2

[0029] Coke oven gas self-reforming and used in blast furnace ironmaking

[0030] The remaining room temperature coke oven gas (the composition is shown in Table 1) during the maintenance of tempered co-production ethylene glycol is sent to the PSD type shell and tube metal heat exchanger to preheat to 750°C through the gas delivery pipeline, and then sent to the coke oven gas through the gas delivery pipeline. Furnace gas self-reforming furnace 3, in the coke oven gas self-reforming furnace 3 at 2417Nm 3 / h Oxygen is introduced to reduce CH in coke oven gas 4 , CO 2 Combustion and reforming of water vapor into reducing gases CO and H 2 , sprayed into the blast furnace for ironmaking.

[0031] Draw through factory practical application, use the inventive method to self-reform coke oven gas 17000m 3 / h into 1860m 3 The blast furnace can be used for iron smelting, and the output can be increased by 8%.

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Abstract

The invention belongs to the technical field of coal chemical industry, and discloses a self-reforming system and method of coke oven gas for blast furnace ironmaking. The system comprises a flue gas generator, a heat exchanger, a coke oven gas self-reforming furnace and a blast furnace. The method comprises the steps of feeding coke oven gas into the heat exchanger for preheating through a gas conveying pipeline, feeding the preheated coke oven gas into the coke oven gas self-reforming furnace through the gas conveying pipeline, introducing oxygen into the coke oven gas self-reforming furnace to combust and reform CH4, CO2 and water vapor in the coke oven gas into reducing gases CO and H2, and spraying the reducing gases into a blast furnace for ironmaking. According to the invention, rapid reduction can be realized, blast furnace coke consumption can be reduced, a coking process and steel generation are organically combined, the problems of energy waste and environmental pollution caused by emptying and burning of residual coke oven gas during tempering co-production ethylene glycol maintenance are solved, relatively great economic benefits can be obtained, relatively great social and environmental benefits can also be obtained at the same time, and a demonstration effect is also achieved for efficient utilization of coke oven gas of steel enterprises in China.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, in particular to a self-reforming system and method of coke oven gas for blast furnace ironmaking. Background technique [0002] Hydrogen metallurgy is a new cutting-edge technology for the iron and steel industry to improve the quality of substrates and reduce pollutant emissions. Hydrogen metallurgy is the main use of hydrogen as a reducing agent in the reduction smelting process. Hydrogen is the most active reducing agent. During the gas-solid reduction reaction of iron oxides, increasing the proportion of hydrogen in the gas reducing agent can significantly increase its reduction rate and reduction efficiency. Compared to the reducing potential of carbon monoxide, the reducing potential of hydrogen is much higher than that of carbon monoxide. [0003] The toughened co-production ethylene glycol project has a one-month maintenance period every year. During the maintenance peri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/32C01B3/24C21B5/00
CPCC01B3/32C01B3/24C21B5/001C01B2203/0205C01B2203/0266C01B2203/0838C21B2005/005Y02P10/143
Inventor 韩海波吴英豪
Owner SHANXI JINNAN IRON & STEEL GRP CO LTD
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