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Reaction equipment and system and method for preparing reducing gas for gas-base shaft furnace

A technology of reaction equipment and gas-based shaft furnace, which is applied in the field of reducing gas for gas-based shaft furnace preparation, and can solve the problems of increased production cost of gas-based direct reduction process, increased investment and operating costs of gasification equipment, etc.

Active Publication Date: 2014-11-19
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these three coal gasification technologies—Lurgi furnace, Texaco furnace and Undok furnace gasification belong to pure oxygen / oxygen-enriched gasification, and the heat required for gasification is mainly provided by the chemical heat released by coal combustion in the gasifier, and The gasification of Lurgi furnace and Texaco furnace belongs to pressurized high-temperature gasification. The investment in air separation and high-temperature and high-pressure equipment in the gasification process will inevitably increase the investment and operation cost of gasification equipment, resulting in an increase in the production cost of the gas-based direct reduction process.

Method used

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  • Reaction equipment and system and method for preparing reducing gas for gas-base shaft furnace
  • Reaction equipment and system and method for preparing reducing gas for gas-base shaft furnace
  • Reaction equipment and system and method for preparing reducing gas for gas-base shaft furnace

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preparation example Construction

[0049] The system for preparing reducing gas for a gas-based shaft furnace according to a specific embodiment of the present invention includes: a reducing gas generating device 100 , a dust collector 200 , a water washing device 300 and a desulfurization and decarbonization device 400 .

[0050] According to a specific embodiment of the present invention, the above-mentioned reducing gas generating equipment 100 is the aforementioned reaction equipment, wherein the gasification chamber 30 is a gasification chamber, and the combustion chamber 40 is a combustion chamber; the dust collector 200 is connected with each The reducing gas outlet of the gasification chamber 30 is connected; the water washing device 300 is connected with the dust collector 200 for washing the reducing gas; the desulfurization and decarbonization device 400 is connected with the water washing device 300 for desulfurizing and decarbonizing the reducing gas.

[0051] Using the system for preparing reducing...

Embodiment 1

[0075] use as Figure 4 The shown system for producing reducing gas for a gas-based shaft furnace produces reducing gas for a gas-based shaft furnace. The specific steps are as follows: first, coal and air are delivered to the combustion chamber 40 from the coal inlet at the top of the combustion chamber 40 and the air inlet at the bottom, and the coal is burned to provide heat for the gasification chamber 30, and the combustion chamber 40 The combustion temperature inside is about 1000-1050 degrees Celsius, and the heat is transferred to the gasification chamber 30 through heat conduction and radiation heat transfer, so that the temperature in the gasification chamber 30 reaches 900-950 degrees Celsius.

[0076] The raw coal inlet at the top of the gasification chamber 30 and the water vapor inlet at the bottom are respectively transported into the heated gasification chamber 30 for gasification raw coal and saturated water vapor, and the gasification raw coal and water vapor...

Embodiment 2

[0079] use as Figure 4 The shown system for producing reducing gas for a gas-based shaft furnace produces reducing gas for a gas-based shaft furnace. The specific steps are as follows: first, coal and air are delivered to the combustion chamber 40 from the coal inlet at the top of the combustion chamber 40 and the air inlet at the bottom, and the coal is burned to provide heat for the gasification chamber 30, and the combustion chamber 40 The combustion temperature inside is about 900-950 degrees Celsius, and the heat is transferred to the gasification chamber 30 through heat conduction and radiation heat transfer, so that the temperature in the gasification chamber 30 reaches 800-900 degrees Celsius.

[0080] From the raw coal inlet at the top of the gasification chamber 30 and the steam inlet at the bottom, the gasified raw coal and water vapor are respectively delivered to the heated gasification chamber 30, wherein the water vapor contains a small amount of air and makes ...

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Abstract

The invention provides reaction equipment, and a system and a method for preparing a reducing gas for a gas-base shaft furnace. The reaction equipment comprises a housing and partitions, wherein a cavity is formed in the housing; the partitions are arranged in the cavity and divide the cavity into a plurality of sub-cavities including a plurality of gasification cavities and a plurality of combustion cavities; the gasification cavities and the combustion cavities are alternately arranged in a first direction and alternately arranged in a second direction orthogonal with the first direction. The reaction equipment is utilized for gasification, gasification reaction and combustion reaction can be independently carried out, equipment investment for pure oxygen or rich oxygen preparation are saved, restriction on selecting gasification raw coal is omitted, and accordingly, the gasification cost can be remarkably lowered.

Description

technical field [0001] The invention relates to the field of reducing gas production, in particular, the invention relates to reaction equipment, a system for preparing reducing gas for a gas-based shaft furnace and a method for preparing reducing gas for a gas-based shaft furnace. Background technique [0002] The gas-based shaft furnace direct reduction process uses H 2 A non-coking coal ironmaking process that reduces iron ore to sponge iron in a shaft furnace using CO gas as a reducing agent. At present, natural gas cracking is mainly used to produce reducing gas. Representative processes include Midrex method, HYL method, etc. The composition of the reducing gas varies with the shaft furnace process. Composition of reducing gas using Midrex process: CO (23.25%), CO 2 (3.00%), H 2 (69.75%), CH 4 (0.50%); the components of reducing gas using HYL process: CO (36.40%), CO 2 (2.00%), H 2 (54.60%), CH 4 (0.10%). In general, the gas-based shaft furnace direct reduction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/02
Inventor 吴道洪王东方宋敏洁
Owner SHENWU TECH GRP CO LTD
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