US 12,281,543 B1
Integrated device and method for continuously capturing, storing and separating flue gas in underground rock stratum
Zhiqin Kang, Taiyuan (CN); Zhihui Wu, Taiyuan (CN); Xiaoyu Wang, Taiyuan (CN); Xiaoyu Zhang, Taiyuan (CN); Lei Wang, Taiyuan (CN); Jing Zhao, Taiyuan (CN); Dong Yang, Taiyuan (CN); and Weiguo Liang, Taiyuan (CN)
Assigned to Taiyuan University of Technology, Taiyuan (CN)
Filed by Taiyuan University of Technology, Taiyuan (CN)
Filed on Aug. 8, 2024, as Appl. No. 18/798,438.
Int. Cl. E21B 41/00 (2006.01); B01D 53/54 (2006.01); B01D 53/62 (2006.01); E21B 34/02 (2006.01); E21B 47/00 (2012.01)
CPC E21B 41/0064 (2013.01) [B01D 53/54 (2013.01); B01D 53/62 (2013.01); E21B 34/02 (2013.01); E21B 47/00 (2013.01); B01D 2256/10 (2013.01); B01D 2257/40 (2013.01); B01D 2257/504 (2013.01); B01D 2258/0283 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An integrated device for continuously capturing, storing and separating a flue gas in an underground rock stratum, comprising:
an injection well, a monitoring well and an emission well, which are arranged in sequence at locations from near to far from a flue gas emission source, so as to form a well pattern,
the injection well comprising at least one injection well, the monitoring well comprising at least two monitoring wells, and the emission well comprising at least four emission wells, and a pore aperture diameter of each emission well being greater than that of each monitoring well and less than that of each injection well;
a well pattern mode promoting the flue gas to migrate in an underground rock porous medium for a distance to undergo a physical and chemical reaction process of differential adsorption, dissolution mineralization and biomass reaction, and in combination with a way of injecting an amount of water or saline or biomass water with a concentration into a storage rock stratum in real time by the monitoring wells, effective capture and storage of CO2 and sulfur nitride and separation and emission of N2 in the flue gas are completed;
a distance from the injection well to the flue gas emission source being less than 1 km, a distance from the monitoring wells to the flue gas emission source being 2-5 km, and a distance from the emission wells to the flue gas emission source being 5-10 km; the injection well, the monitoring wells and the emission wells being respectively drilled to different depths in a storage rock stratum; a horizontal injection channel being arranged at a bottom end of the injection well; a length of the horizontal injection channel being between the injection well and the emission wells, and the horizontal injection channel not being in communication with the monitoring wells;
a backpressure valve being arranged at a wellhead location of each of the monitoring wells and the emission wells; the flue gas being pressed into the injection well, an injection pressure of the flue gas being less than or equal to 10 MPa, and enters-entering the storage rock stratum along the horizontal injection channel; CO2 and sulfur nitride in the flue gas being dynamically captured and stored during migrating of the flue gas in the storage rock stratum, and N2 being separated and then migrated upwards to the emission well to be emitted; and
an end hole location of the injection well being located at a lower middle region of the storage rock stratum, an end hole location of each monitoring well being located at a middle region of the storage rock stratum, and an end hole location of each emission well being located at an upper middle region of the storage rock stratum.