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Sintering energy-saving and emission-reducing method for coupling injection of micro-fine particle biomass fuel and hydrogen-containing fuel gas

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

Active Publication Date: 2022-02-25
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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  • Sintering energy-saving and emission-reducing method for coupling injection of micro-fine particle biomass fuel and hydrogen-containing fuel gas
  • Sintering energy-saving and emission-reducing method for coupling injection of micro-fine particle biomass fuel and hydrogen-containing fuel gas
  • Sintering energy-saving and emission-reducing method for coupling injection of micro-fine particle biomass fuel and hydrogen-containing fuel gas

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Experimental program
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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%, returned ore 24.7%, and coke powder 3.3%, the materials are mixed and granulated, and the mixture is distributed to the sintering table Car, ignite for 1 min at a temperature of 1050±50°C and a negative pressure of -5kPa, and then sinter at a negative pressure of -14kPa. Use an infrared thermal imager to divide the material surface between the ignition furnace and the temperature of the sintering waste gas to rise, and spray fine-grained sawdust with a calorific value equal to that of 2.0% natural gas by volume to the area where the temperature of the material surface is >500°C. Its particle size composition is shown in Table 1, and the injection height is 400mm; the micro-grained sawdust with the calorific value equal to the volume percentage concentration of 1.0% natural gas is sprayed into the area where the temperature of the material surface is 300-500°C, and the injec...

Embodiment 2

[0031] According to the mass ratio of mixed iron ore 64.3%, dolomite 2.3%, limestone 1.5%, quicklime 4.0%, returned ore 24.7%, coke powder 3.2%, after the materials are mixed and granulated, the mixture is distributed to the sintering table Car, ignite for 1 min at a temperature of 1050±50°C and a negative pressure of -5kPa, and then sinter at a negative pressure of 14kPa. Use an infrared thermal imager to divide the material surface between the ignition furnace and the temperature of the sintering waste gas to rise, and spray fine-grained sawdust with a calorific value equal to that of 2.5% natural gas by volume to the area where the temperature of the material surface is >500°C. Its particle size composition is shown in Table 1, and the injection height is 400mm; the fine-grained sawdust with the calorific value equal to the volume percentage concentration of 1.3% natural gas is sprayed into the area where the temperature of the material surface is 300-500 °C, and the injecti...

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Abstract

The invention discloses a sintering energy-saving and emission-reducing method for the coupling injection of micro-fine particle biomass fuel and hydrogen-containing fuel gas. The method comprises the following steps: according to the temperature distribution condition of a sintering material surface, dividing the sintering material surface from an ignition furnace to the temperature of sintering waste gas which begins to rise into a solid micro-fine particle biomass fuel injection area and a gaseous hydrogen-containing fuel gas injection area, and respectively injecting micro-fine particle biomass fuel and hydrogen-containing fuel gas. According to the method, biomass particle fuel is combusted to supply heat in a high charge level temperature area, and hydrogen-containing gas is blown in an area with low charge level temperature and good air permeability, so that the safety problem caused by the escape of the hydrogen-containing gas when the hydrogen-containing gas is blown in a middle-upper material layer is avoided; sufficient heat can be provided for the upper portion of the material layer, the proportion of replacing solid fossil fuel with clean gas and biomass fuel is greatly increased, and the method has obvious economic and environment-friendly advantages and is beneficial to green development of the 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, in particular to a method for utilizing biomass particles in the high-surface-temperature region of the sintering material layer Fuel combustion heating, a method of injecting hydrogen-containing gas in an area with low material surface temperature and good air permeability 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] Sintering ore is the main furnace material for blast furnace ironmaking in my country's iron and steel industry, and the energy consumption of its production process is 9% to 12% of the total energy consumption of iron and steel enterprises. The conventiona...

Claims

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Application Information

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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
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