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A sintering energy saving and emission reduction method for coupled injection of fine-grained biomass fuel and hydrogen-containing gas

A biomass fuel, energy saving and emission reduction technology, which is applied in the field of sintering energy saving and emission reduction of fine-grained biomass fuel and hydrogen-containing gas coupled injection, can solve the problem of limited reduction in the proportion of solid fossil fuels, and achieve reduced consumption and efficient conversion. , the effect of efficient and sufficient supply

Active Publication Date: 2022-07-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In response to this situation, in industrial production, the area covered by the gas on the material surface usually needs to be separated from the ignition furnace, but this injection method has a limited role in providing sinter production and quality indicators and reducing the proportion of solid fossil fuels.

Method used

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  • A sintering energy saving and emission reduction method for coupled injection of fine-grained biomass fuel and hydrogen-containing gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]According to the mass ratio of mixed iron ore 64.2%, dolomite 2.3%, limestone 1.5%, quicklime 4.0%, return ore 24.7%, coke powder 3.3%, after the materials are mixed and granulated, the mixture is distributed to the sintering table The car was ignited for 1 min at a temperature of 1050±50 °C and a negative pressure of -5kPa, and then sintered under the condition of a negative pressure of -14kPa. An infrared thermal imager is used to divide the material surface between the ignition furnace and the temperature of the sintering exhaust gas to start to rise. Its particle size composition is shown in Table 1, the injection height is 400mm; the fine-grained sawdust with the calorific value of natural gas with a volume percentage concentration of 1.0% is injected into the area with a surface temperature of 300-500°C, and the injection height is 250mm; To the area of ​​~300°C, inject natural gas with a concentration of 0.5% by volume, and the injection height is 500mm; to the ar...

Embodiment 2

[0031] According to the mass ratio of mixed iron ore 64.3%, dolomite 2.3%, limestone 1.5%, quicklime 4.0%, return ore 24.7%, coke powder 3.2%, after the materials are mixed and granulated, the mixture is distributed to the sintering table The car was ignited for 1 min at a temperature of 1050±50 °C and a negative pressure of -5kPa, and then sintered under the condition of a negative pressure of 14kPa. An infrared thermal imager is used to divide the material surface between the ignition furnace and the temperature of the sintering exhaust gas to start to rise. Its particle size composition is shown in Table 1, the injection height is 400mm; the fine-grained sawdust with the calorific value of natural gas with a volume percentage concentration of 1.3% is injected into the area with a surface temperature of 300-500°C, and the injection height is 250mm; To the area of ​​~300°C, inject natural gas with a concentration of 0.7% by volume, and the injection height is 500mm; to the ar...

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Abstract

The invention discloses a sintering energy saving and emission reduction method of coupled injection of fine-grained biomass fuel and hydrogen-containing gas. The material surface is divided into a solid fine-grained biomass fuel injection area and a gaseous hydrogen-containing gas injection area, and the fine-grained biomass fuel and hydrogen-containing gas are injected respectively. In the method, biomass pellet fuel is used for heating in the high material surface temperature area, and hydrogen-containing gas is injected in the area with low material surface temperature and good air permeability, so as to avoid the escape caused by the escape of hydrogen-containing gas in the middle and upper material layers. It can provide sufficient heat to the upper part of the material layer and greatly increase the ratio of clean gas and biomass fuel to replace solid fossil fuels. It has obvious economic and environmental advantages and is beneficial to the green development of the iron and steel industry.

Description

technical field [0001] The invention relates to a sintering injection technology, in particular to a sintering energy-saving and emission reduction method for coupled injection of fine-grained biomass fuel and hydrogen-containing gas, and in particular to a method for utilizing biomass particles in a high-surface-temperature area of ​​a sintered material layer Fuel combustion provides heat, and the method of injecting hydrogen-containing gas in the area with low temperature and good air permeability of the material surface to provide sufficient heat to the upper part of the material layer and increase the injection amount of clean fuel belongs to the sintering industry in the field of iron and steel metallurgy. Background technique [0002] Sinter is the main charge for blast furnace ironmaking in my country's iron and steel industry, and its production process energy consumption is 9% to 12% of the total energy consumption of iron and steel enterprises. The conventional sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 季志云范晓慧甘敏李浩锐武钰丰陈许玲黄晓贤孙增清曹风袁礼顺
Owner CENT SOUTH UNIV