Patent ID: 9150800
Filing Date: 2015-10-06
Classification: C01B,C10J,C10K,Y02E,Y02P

Abstract:
1. A process of conditioning a first stage syngas stream containing unwanted species in a first stage concentration formed by a first stage gasification unit of an integrated gasification process for low reactivity fuels, the process comprising: converting the first stage syngas stream containing the unwanted species in the first stage concentration into a second stage syngas stream containing the unwanted species in a second stage concentration in a high temperature second stage turbulent fluidized bed gasifier having operating characteristics, wherein a first operating characteristic of the second stage gasifier is operating the second stage turbulent fluidized bed gasifier in the range of approximately 1100 to 1400° C., the second stage turbulent fluidized bed gasifier including bed material in a bed material region, a freeboard region above the bed material region, and an outlet for the second stage syngas stream containing the unwanted species in the second stage concentration, the second stage concentration of the unwanted species lower than the first stage concentration of the unwanted species; tempering the second stage syngas stream temperature containing the unwanted species in the second stage concentration in a syngas temperament device (STD); and returning at least a portion of bed material from the second stage turbulent fluidized bed gasifier flowing through the STD to the second stage turbulent fluidized bed gasifier; wherein the process achieves over approximately 95% carbon conversion into syngas gasifying low reactivity fuels comprising carbonaceous materials with ash content up to approximately 45 wt %.