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Shell's mixed coal gasification process
The process is a clean coal gasification technology that is designed and integrated on the basis of Shell's dry powder gasification technology and Wison's coal gasification engineering and operation technology over many years, with the advanced level in the world. A feeding mode of conveying pulverized coal through dense-phase CO2 gas is adopted for the unit, and the pure oxygen is used as a gasifying agent and sent into a gasification furnace in parallel; due to the high temperature (1,600°C) of the gasification furnace chamber, a series of physical and chemical changes, such as the temperature rise, removal of volatile components, cracking, combustion and conversion, are completed in a very short time. 4 coal burners are symmetrically arranged in the gasifier, with a daily pulverized coal (designed coal type) feeding quantity of 880 t for a single furnace, a crude synthesis gas (CO+H2) output of 55,000 Nm3/h, a pressure of 4.16 MPa, a carbon conversion rate of more than 99%, and featuring low oxygen consumption, high cooled gas efficiency, clean product gas due to slag tapping, and an effective gas (CO+H2) rate of more than 90% (dry basis).