Method and device for producing a raw synthesis gas

摘要

A method and an apparatus for generating a gas containing hydrogen (H2) and carbon monoxide (CO), as a raw material for chemical utilization in, for example, synthesis processes based on export gas from a metallurgical process, are shown. Part of the export gas is subjected to CO conversion with the addition of water vapor, crude synthesis gas with a defined quantity ratio of H2 to CO being formed. Even the water vapor required for CO conversion can be at least partially generated in at least one steam generator in the method.

主权项

1. A method for generating a gas containing hydrogen and carbon monoxide, as a raw material for chemical utilization in synthesis processes based on export gas from a metallurgical process, the method comprising:
adding at least one of water and water vapor to the metallurgical process thereby affecting the quantity ratio of H2 to CO, in the export gas; obtaining the export gas from top gas from a blast furnace or a reduction shaft or from offgas from a fluidized bed reactor or from excess gas from a melt-down gasifier or from mixtures of these gases; subjecting at least part of the export gas to CO conversion in a transformation reactor with the addition of water vapor from a steam generator; using the converted at least part of the export gas as a crude synthesis gas with a defined quantity ratio of H2 to CO, in a subsequent synthesis process; storing a further part of the export gas in a gasholder for the purpose of compensating fluctuations in at least one of quantity and in calorific value in the export gas; and generating the water vapor in the steam generator by means of the combustion of the at least further part of the export gas.