US 12,203,701 B2
Emission free fluff transfer system and integrated nitrogen cycle
Reza Khankal, Bellaire, TX (US); Enrique Mancillas, Houston, TX (US); Kamaljeet Kaur, Katy, TX (US); and Hetian Li, Houston, TX (US)
Assigned to Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed by Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed on Sep. 15, 2023, as Appl. No. 18/368,752.
Application 18/368,752 is a continuation of application No. 17/964,487, filed on Oct. 12, 2022, granted, now 11,815,310.
Application 17/964,487 is a continuation of application No. 17/511,169, filed on Oct. 26, 2021, granted, now 11,549,748, issued on Jan. 10, 2023.
Prior Publication US 2024/0003621 A1, Jan. 4, 2024
Int. Cl. C08F 6/00 (2006.01); B01D 45/16 (2006.01); B65G 53/60 (2006.01); F26B 3/02 (2006.01)
CPC F26B 3/02 (2013.01) [B01D 45/16 (2013.01); B65G 53/60 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydrocarbon recovery system comprising:
a purge column;
a separator;
a purge gas-hydrocarbon recovery unit; and
a waste gas outlet line,
wherein the purge column is configured for contact of wet polymer fluff with a purge gas, and comprises a wet polymer fluff inlet, a gas outlet for an overhead stream comprising the purge gas and entrained polymer fluff, a fluff outlet for a purged polymer fluff, and one or more purge gas inlets for the purge gas,
wherein the separator is fluidly connected with the gas outlet of the purge column and is configured to separate solids comprising recovered polymer fluff from a separator gas outlet stream comprising the purge gas and hydrocarbon,
wherein the purge gas-hydrocarbon recovery unit is fluidly connected with the separator and is configured to separate the separator gas outlet stream into a recovered hydrocarbon stream and a recovered purge gas stream,
wherein the hydrocarbon recovery system is integrated with a fluff transfer system configured for transporting the purged polymer fluff via circulation of a fluff transfer gas,
wherein the hydrocarbon recovery system is integrated with the fluff transfer system such that at least a portion of the recovered purge gas in the recovered purge gas stream is introduced into the fluff transfer system as the fluff transfer gas; and
wherein there is no gas outlet from the fluff transfer system other than an optional outlet for the fluff transfer gas in the fluff transfer system whereby a portion of the fluff transfer gas can be introduced into the purge column as at least a portion of the purge gas.