US 12,298,004 B2
Determining one or more proportional particle group shares in flue gas of a recovery boiler
Heikki Lappalainen, Varkaus (FI); and Petri Pynnönen, Kotka (FI)
Assigned to Andritz Oy, Helsinki (FI)
Appl. No. 17/623,151
Filed by ANDRITZ OY, Helsinki (FI)
PCT Filed Jun. 25, 2020, PCT No. PCT/FI2020/050456
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2020/260762, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 20195580 (FI), filed on Jun. 28, 2019.
Prior Publication US 2022/0268442 A1, Aug. 25, 2022
Int. Cl. F23N 5/26 (2006.01); D21C 11/06 (2006.01); D21C 11/12 (2006.01); F27D 19/00 (2006.01); F27D 21/02 (2006.01); G01N 15/14 (2024.01); G01N 15/1433 (2024.01); G01N 15/1434 (2024.01)
CPC F23N 5/265 (2013.01) [D21C 11/06 (2013.01); D21C 11/12 (2013.01); F27D 19/00 (2013.01); F27D 21/02 (2013.01); G01N 15/1433 (2024.01); G01N 15/1436 (2013.01); F27D 2021/026 (2013.01); G01N 2015/1443 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for determining a proportion of one or more particle groups in flue gas from a recovery boiler, the method comprising:
reading, with a processor, a digital frame including an image of an area under consideration representing at least a part of a surface of a sampler after the surface is in the flue gas flow of the recovery boiler for a period of time;
identifying, with the processor, in the image of the area under consideration one or more first particle group areas matching a first predetermined color characteristic of a first particle group included in the flue gas of the recovery boiler and a second predetermined color characteristic of one or more second particle groups included in the flue gas, wherein the second predetermined color characteristic differs from the first color characteristic and the second particle group differs from the first particle group;
determining, with the processor, a first joint area representing a combined area of the one or more first particle group areas; and
determining, with the processors, a first share of the first joint area of a predetermined total area of the sampler, wherein the first share is a portion of the predetermined total area attributable to the one or more first particle group areas.