Novel reforming furnace for preparing reducing gas

Abstract

The invention provides a novel reforming furnace for preparing reducing gas, and belongs to the technical field of metallurgy and petrifaction. The reforming furnace comprises a lining radiation chamber, a reforming furnace pipe, a reforming gas port pipe system, a transition section, a convection section and an air and flue gas system. The reforming furnace pipe adopts a large caliber to reduce the furnace pipe number, so that the investment is reduced; a reforming gas inlet pipe is connected with the reforming furnace pipe by adopting a flexible pipe, so that the axial and radial heat displacements of the furnace pipe are conveniently absorbed, and the heat stress of a furnace pipe system is reduced; an elastic bracket is arranged at the bottom of the reforming furnace pipe for bearing part weight of the furnace pipe and facilitating recovery of the furnace pipe after heat expansion under the working condition of parking; a radiation chamber furnace top inclined tee joint replaces atraditional heat pipe wall, and a short tail box is canceled, so that materials are saved, and the investment is reduced; and high-temperature smoke is guided to the transition section from multiple channels at the upper parts of the two sides of the radiation chamber, and is fed in the convection section for preheating air and reforming raw material gas and fuel gas to generate high-quality vapor, so that the smoke discharge heat loss is reduced, and the heat efficiency of the reforming furnace is improved.

Description

Technical field: [0001] The invention belongs to the field of metallurgy and petrochemical technology, and relates to a novel reforming furnace for producing reducing gas. Background technique [0002] Gas-based direct reduced iron has the characteristics of short process, high efficiency and less impurities. It is a new type of advanced metallurgical steelmaking method that is different from traditional blast furnace steelmaking. At present, there is no precedent for the production of gas-based direct reduced iron in China. [0003] The main problem of gas-based reduced iron is to solve the production of reducing gas. The production of reducing gas in foreign countries mainly uses natural gas steam reforming or partial oxidation to produce synthesis gas. However, domestic natural gas resources are limited, and it is unlikely to use foreign synthetic gas production processes. In order to develop the domestic direct reduced iron industry, a new type of equipment is needed to...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of equipment for producing the reducing gas of direct reduced iron in view of the above-mentioned technical problems, and solve the technical and economic problems of reducing gas for producing direct reduced iron in the country

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