US 11,850,550 B2
Arrangement for and a method of operating a steam boiler system
Antti Rokka, Espoo (FI)
Assigned to SUMITOMO SHI FW ENERGIA OY, Espoo (FI)
Appl. No. 17/786,258
Filed by SUMITOMO SHI FW ENERGIA OY, Espoo (FI)
PCT Filed Dec. 18, 2019, PCT No. PCT/EP2019/085948
§ 371(c)(1), (2) Date Jun. 16, 2022,
PCT Pub. No. WO2021/121575, PCT Pub. Date Jun. 24, 2021.
Prior Publication US 2023/0016404 A1, Jan. 19, 2023
Int. Cl. B01D 53/34 (2006.01); B01D 53/86 (2006.01); B01D 46/02 (2006.01); F22D 1/36 (2006.01); F22G 1/02 (2006.01); F23J 15/04 (2006.01); F23J 15/08 (2006.01); F23J 15/02 (2006.01)
CPC B01D 53/343 (2013.01) [B01D 46/02 (2013.01); B01D 53/8631 (2013.01); B01D 53/8696 (2013.01); F22D 1/36 (2013.01); F22G 1/02 (2013.01); F23J 15/04 (2013.01); F23J 15/08 (2013.01); F23J 15/025 (2013.01); F23J 2215/10 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An arrangement for a steam boiler system, the arrangement comprising:
a furnace;
a number of superheaters along a flue gas channel that follows the furnace;
a plurality of economizers;
at least one air preheater located in the flue gas channel downstream of the economizers;
a fabric filter baghouse located in the flue gas channel downstream of the at least one air preheater;
a selective catalytic reduction (SCR) system downstream of the fabric filter baghouse, the SCR system comprising an SCR reactor, a steam coil heater upstream of the SCR reactor and a gas-gas heat exchanger connected upstream and downstream of the SCR reactor to transfer heat from flue gas after the SCR reactor to the flue gas upstream of the steam coil heater; and
at least one heat exchanger located in the flue gas channel after the SCR system, the heat exchanger being configured to transfer heat, when in use, from the flue gas downstream of the SCR system to a fluid medium in a fluid circuit, the fluid circuit comprising at least one pump configured to lead the fluid medium to preliminary air heaters configured to heat inlet air before entering the flue gas air preheater.