Patent ID: 9409136
Filing Date: 2016-08-09
CPC Classification: B01J,C10J,F23K

Claim Text:
1. A method of using a coal feeder system comprising a coal surge bin configured to store processed coal for feeding into a gasifier; a lock vessel coupled to the coal surge bin, the lock vessel being a pressure swing device; a gas collector and distributor disposed within the lock vessel, the gas collector and distributor configured to distribute gas within the lock vessel; a gas permeable membrane disposed within a conical section of the lock vessel; a feed vessel coupled to the lock vessel, the feed vessel configured to operate at a substantially constant pressure; a pressure control device programmed to maintain a substantially constant pressure between the feed vessel and a gasifier; and a feeder device configured to control a coal feed rate into the gasifier, the method comprising the steps of: loading the lock vessel with pulverized coal; pressurizing the lock vessel by a slow pressurization step for up to about sixty seconds; pressurizing the lock vessel by a fast pressurization step till the pressure is within about 5% of a final desired pressure; and pressurizing the lock vessel by a slow pressurization step until a final desired pressure is reached.