Pyrolysis coupling gas base vertical furnace and method thereof

Abstract

The invention discloses a pyrolysis-coupled gas-based shaft furnace and a method thereof. The pyrolysis-coupled gas-based shaft furnace includes: a pyrolysis reaction component, a dust removal component, a separation and purification system, a methane reforming change system, a semi-coke collection component and a gas-based shaft furnace. shaft furnace. The pyrolysis reaction component includes a reactor, and the reactor has a feed inlet, an oil and gas outlet, and a semi-coke outlet. The dust removal component has a gas inlet, a gas outlet and a dust outlet, and the gas inlet communicates with the oil and gas outlet. According to the pyrolysis coupled gas-based shaft furnace of the present invention, by setting the pyrolysis reaction component, dust removal component, separation and purification system, methane reforming change system, semi-coke collection component and gas-based shaft furnace, the raw material can be heated in the pyrolysis reaction component Moreover, the pyrolysis gas can be dedusted and purified by the dust removal component, and the pyrolysis gas after dust removal and purification can enter the gas-based shaft furnace for metal reduction and smelting, which effectively prevents Cause more pipeline blockage.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a pyrolysis coupled gas-based shaft furnace and a method thereof. Background technique [0002] The main process of the ironmaking process is the blast furnace ironmaking process. Although blast furnace ironmaking technology is mature, with large production capacity and high production efficiency, the process is facing unprecedented pressure under the pressure of severe excess capacity of crude steel and the pressure of energy conservation and environmental protection of iron and steel enterprises. [0003] Gas-based shaft furnace direct reduction ironmaking is a relatively mature and environmentally friendly production process in the field of non-blast furnace ironmaking. It does not require coke, saves energy consumption and waste gas emissions in the conversion of coal coke, energy saving and environmental protection, and can meet the needs of modern iron and steel prod...

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Problems solved by technology

[0004] In related technologies, the coal-to-gas-shaft furnace direct reduction technology has the following defects: coke oven gas contains a small amount of impurities such as BTX (a mixture of benzene, toluene, and xylene), tar, and naphthalene, and when the reducing gas passes through the heater, BTX Carbon deposition will occur, causing pipeline blockage; the working pressure in the shaft furnace is about 0.6MPa, while the gas pressure output from the coking plant is about 5MPa, so the coke oven gas needs to be pressurized, and the tar and naphthalene in the gas are pressurized during the pressurization process It will be precipitated in large quantities, which will block equipment and pipelines; the system equipment is complex and difficult to operate

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