US 9,809,769 B2
Fluidized bed biogasifier and method for gasifying biosolids
Douglas R. Bull, Vancouver (CA); Ross M. Patten, Palm Coast, FL (US); Paul Cairney, Deltona, FL (US); Gerald M. Cox, Cocoa, FL (US); and William P. Jepson, Orlando, FL (US)
Assigned to Aries Gasification, LLC, Nashville, TN (US)
Filed by PHG ENERGY, LLC, Nashville, TN (US)
Filed on Dec. 14, 2015, as Appl. No. 14/967,973.
Application 14/967,973 is a division of application No. 13/361,582, filed on Jan. 30, 2012, granted, now 9,242,219.
Prior Publication US 2016/0168492 A1, Jun. 16, 2016
Int. Cl. C01B 7/00 (2006.01); C10J 3/46 (2006.01); B01J 8/18 (2006.01); C10J 3/48 (2006.01); C10K 1/02 (2006.01); C02F 11/10 (2006.01); C10J 3/84 (2006.01); C02F 11/12 (2006.01)
CPC C10J 3/466 (2013.01) [B01J 8/1809 (2013.01); B01J 8/1827 (2013.01); C02F 11/10 (2013.01); C10J 3/482 (2013.01); C10J 3/84 (2013.01); C10K 1/026 (2013.01); B01J 2208/00893 (2013.01); B01J 2208/00902 (2013.01); C02F 11/12 (2013.01); C02F 11/121 (2013.01); C10J 2300/0909 (2013.01); C10J 2300/0916 (2013.01); C10J 2300/0923 (2013.01); C10J 2300/0956 (2013.01); C10J 2300/1643 (2013.01); C10J 2300/1807 (2013.01); Y02P 20/129 (2015.11); Y02W 10/40 (2015.05); Y10T 29/49 (2015.01)] 18 Claims
OG exemplary drawing
 
1. A method for gasifying biosolids obtained from sewage sludge, comprising:
receiving biosolids in a fluidized bed biogasifier, the biogasifier having:
a reactor vessel;
a freeboard section having a diameter of at least 57 inches and a height of at least 10 feet;
a feeder for feeding biosolids into said reactor vessel, said feeder being configured to feed said biosolids into said reactor vessel at a biosolids fuel feed rate during steady-state operation of the biogasifier; and
a fluidized bed in a bed section of said reactor vessel, said fluidized bed having a diameter of at least 45 inches;
wherein the freeboard section has a greater diameter than the fluidized bed,
wherein the ratio of the freeboard section diameter to the fluidized bed diameter is at least 57:45;
and further wherein a ratio of a height of the bed section of the reactor vessel to a depth of the fluidized bed is 1.5;
introducing gas to said fluidized bed reactor; and
heating and reacting said biosolids inside said biogasifier, whereby biosolids are gasified.