US 12,467,626 B2
Method and furnace for incinerating organic matter derived from the treatment of industrial or agricultural waste or wastewater, such as sludge
Jean-Louis Bourdais, Chateaubriant (FR)
Assigned to SUEZ INTERNATIONAL, Paris (FR)
Appl. No. 17/641,082
Filed by SUEZ INTERNATIONAL, Paris (FR)
PCT Filed Sep. 11, 2020, PCT No. PCT/EP2020/075518
§ 371(c)(1), (2) Date Mar. 7, 2022,
PCT Pub. No. WO2021/048386, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. FR1910166 (FR), filed on Sep. 13, 2019.
Prior Publication US 2022/0349573 A1, Nov. 3, 2022
Int. Cl. F23G 5/30 (2006.01); F23G 7/00 (2006.01); F23G 7/10 (2006.01)
CPC F23G 5/30 (2013.01) [F23G 7/001 (2013.01); F23G 7/10 (2013.01); F23G 2203/50 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for incinerating organic matter trapped in a mineral and/or liquid matrix issued from the treatment of waste water, industrial or agricultural waste, in a fluidised bed incineration furnace configured to treat a volume of the organic matter equal to a nominal value, the furnace including an enclosure in a lower part thereof, the enclosure including a particle bed constituting a fluidisation zone, the method comprising:
introducing the organic matter as fuel into the fluidisation zone while injecting air as an oxidant into the particle bed from a wind box through a fluidisation dome on top of the wind box, the air passing through passages provided in the fluidisation dome; and
adjusting a volume of the fluidisation zone and a flow rate of the air coming into the fluidisation zone as a function of a volume of the organic matter to be treated, in which, when the volume of the organic matter to be treated is lower than the nominal value, reducing the volume of the fluidisation zone from an initial volume to a reduced volume, and reducing the flow rate of the air by sealing a portion of the passages so as to leave active only the passages opening into the thus reduced volume fluidisation zone,
wherein adjusting the volume of the fluidisation zone comprises installing an insert in the form of a sleeve having a shape complementary to the portion of the enclosure delimiting the fluidisation zone and extending against the portion of the enclosure delimiting the fluidisation zone from the fluidisation dome over a height lower than or equal to a height of the fluidisation zone.