System and process for producing hydrogen by deoxidizing mixed gas of blast furnace coal gas and converter coal gas

Abstract

The invention discloses a system and a process for producing hydrogen by deoxidizing mixed gas of blast furnace coal gas and converter coal gas. The process comprises the following steps: 1) mixing blast furnace coal gas and converter coal gas in a coal gas cabinet; 2) compressing the mixed coal gas into a pressure stabilizing tank through a compressor; 3) heating the pressurized mixed gas, feeding the heated mixed gas into an oxygen content adjusting tower, and adjusting the oxygen content; 4) carrying out organic sulfur hydrolysis conversion on the mixed gas with the adjusted oxygen content; 5) adjusting the ratio of water vapor to gas in the mixed gas obtained by organic sulfur hydrolysis through a gas-vapor blending device; and 6) feeding the mixed gas with the water vapor content adjusted into a CO conversion device, and reacting to generate CO2 and H2. According to the invention, mixed gas is subjected to oxygen content adjustment, organic sulfur conversion and gas-vapor adjustment, so that the service lives of an organic sulfur conversion catalyst and a shift catalyst are greatly prolonged, a multi-stage reaction device required by CO shift is simplified, and CO in the mixed gas can be effectively converted into hydrogen through one-time reaction under the action of the shift catalyst.

Description

Technical field [0001] The present invention relates to the field of gas resource technology, and more particularly to a blast furnace and converter gas mixing gas deoxy hydrogenation system and process. Background technique [0002] The product after hydrogen is water, so it is considered to be the most environmentally friendly fuel. However, the main raw material of hydrogen production is still based on oil, natural gas, coal and other fossil resources, and the consumption of these resources is recognized to environmental pollution. On the other hand, steel production also needs to consume a certain amount of fossil resources and produce a large amount of blast furnace gas and a small part of the converter gas. The blast furnace gas has a considerable combustion value, wherein the volume content of carbon monoxide is about 28%, and the volume content of hydrogen is about 1%, and the volume content of methane is about 0.5%. Blast furnace gas is usually sent to hot air furnaces, ...

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