Novel biomass synthesis gas directional preparation and blast furnace smelting coupling co-production process

A blast furnace smelting and biomass technology, which is applied in the field of blast furnace smelting, can solve the problems of low melting point of biomass ash, corrosion, and high requirements for gasification equipment, and achieve the effects of reducing heat loss, production cost, and transportation cost.

Active Publication Date: 2022-08-05
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

However, my country's high-quality coal resource reserves are less than 8%, and blast furnace pulverized coal injection still consumes non-renewable fossil energy in essence
In the process of practical industrial application of traditional biomass gasification technology, there are still the following main problems: (1) Biomass ash has a low melting point and high content of alkali metal elements, and direct combustion is easy to coke and cause high-temperature alkali metal element corrosion ; (2) The gasification equipment has high requirements on raw materials, and the gasification efficiency is low; (3) The tar content in the gas is high, and the quality and calorific value of the synthesis gas are not high

Method used

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  • Novel biomass synthesis gas directional preparation and blast furnace smelting coupling co-production process

Examples

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Effect test

Embodiment 1

[0047] see figure 2 As shown, the present implementation provides a new process for the directional preparation of biomass synthesis gas and the coupled co-production of blast furnace smelting, including the following steps:

[0048] S1. Construct a coupling system for the directional preparation of biomass synthesis gas and blast furnace smelting, including a biomass synthesis gas preparation unit, a synthesis gas conveying unit and a blast furnace that are connected in sequence; the synthesis gas conveying unit is communicated with the injection system of the blast furnace; the top of the blast furnace The gas outlet is communicated with the gasification agent inlet of the biomass synthesis gas preparation unit;

[0049] S2. Establish a flow evolution path model of ferrite flow and carbon flow in combination with blast furnace raw material composition, preset pig iron composition, and blast parameters, and establish an energy-mass balance model according to heat income and ...

Embodiment 2

[0054] This embodiment provides a new process for the directional preparation of biomass synthesis gas and the coupled co-production of blast furnace smelting. Compared with Embodiment 1, the difference is that the raw material for preparing biomass synthesis gas is ordinary biomass (C, H, The content of O element is 47wt%, 6wt%, 35wt% respectively); the rest are roughly the same as in Example 1, and will not be repeated here.

[0055] Each component CO of furnace top gas collected in the blast furnace smelting process in Example 2 2 , water vapor, CO and H 2 The content of 25.0%, 12.1%, 46.2%, 16.2%, respectively, after the blast furnace gas and slag water-cooled, the hot water vapor produced by water cooling is transported to the gasifier, and the process parameters of the biomass synthesis gas preparation unit are adjusted: the gasification temperature is 1200℃, solid phase residence time is 3min, additional water vapor is required, after adding water vapor, the mass ratio...

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Abstract

The invention provides a novel biomass synthesis gas directional preparation and blast furnace smelting coupling co-production process, which is characterized in that a biomass synthesis gas preparation unit is combined with a blast furnace, and prepared biomass synthesis gas is directly injected into the blast furnace instead of pulverized coal; meanwhile, top gas generated by blast furnace smelting and water vapor converted by sensible heat of slag are circularly applied to a biomass synthesis gas preparation unit and serve as a gasifying agent to be used for preparing synthesis gas; according to an energy mass balance model of blast furnace smelting, the optimal H2/CO volume ratio of blast furnace injection in theory is calculated, then the process parameters and the corresponding injection amount of a biomass synthesis gas preparation unit are adjusted, the biomass synthesis gas more suitable for blast furnace injection is prepared, and energy mass coupling of the biomass synthesis gas and the blast furnace is achieved. Biomass synthesis gas preparation and blast furnace smelting are coupled, energy loss is reduced, the production cost of the biomass synthesis gas and the blast furnace is reduced, meanwhile, the lowest energy consumption and carbon emission of blast furnace smelting are achieved, and the purposes of energy conservation and emission reduction are achieved.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting, in particular to a new process for coupling and co-production of directional preparation of biomass synthesis gas and blast furnace smelting. Background technique [0002] Blast furnace-converter is the most important iron and steel production process in my country at present and for a long period of time in the future. As a steel industry based on carbon metallurgy, blast furnace ironmaking accounts for about 70% of energy consumption and carbon emissions in the iron and steel industry, which is an energy-saving technology. The main battlefield of emission reduction. In the blast furnace injection process, a large amount of pulverized coal needs to be consumed to reduce the coke ratio, thereby reducing coking pollution and improving the economic benefits of iron and steel enterprises. H produced during the combustion of pulverized coal 2 It can increase the reduction ability and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/72
CPCC10J3/72C10J3/723C10J2300/0976C10J2300/0903C10J2300/16Y02P10/143
Inventor 徐润生张建良叶涟
Owner UNIV OF SCI & TECH BEIJING
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