Abstract: A cooling absorption tower for a CO2 recovery device, comprises: an outer shell; a cooling section for cooling a flue gas, the cooling section being disposed in the outer shell; and an absorbing section configured to cause CO2 in the flue gas cooled by the cooling section to be absorbed in an absorption solvent, the absorbing section being disposed in the outer shell and above the cooling section.

Abstract: A relay device, installed at one end of a power line within a protected zone, includes a processor performing a transmitting process that transmits first sampling current data of the power line at the one end to another relay device installed at the other end, through a 2048-kbps transmission line, and a receiving process that receives second sampling current data of the power line at the other end from the another relay device through the transmission line; a calculator calculating a difference, used for detection of an occurrence of fault, between the first and the second sampling current data; and a human-machine interface capable of receiving and presenting information through a display unit. The processor transmits the first sampling current data in a transmission frame, and transmits, using an unused field not for the sampling current data in the transmission frame, display-related data output from the human-machine interface.