US 11,906,245 B2
System for reheating air in dryers
Reinaldo Augusto Uribe Arancibia, Santiago (CL); and George Z. Nowakowski, Montreal (CA)
Assigned to CMPC TISSUE S.A., Santiago (CL); and ANDRITZ LTD., Montreal (CA)
Filed by CMPC Tissue S.A., Santiago (CL); and Andritz Ltd., Montreal (CA)
Filed on Apr. 18, 2023, as Appl. No. 18/136,286.
Application 18/136,286 is a continuation of application No. 17/223,242, filed on Apr. 6, 2021, granted, now 11,662,142.
Prior Publication US 2023/0251034 A1, Aug. 10, 2023
Int. Cl. F26B 21/02 (2006.01); B01F 35/21 (2022.01); B01F 23/10 (2022.01); F26B 3/04 (2006.01); F26B 20/00 (2006.01)
CPC F26B 21/02 (2013.01) [B01F 23/191 (2022.01); B01F 35/2113 (2022.01); B01F 35/2115 (2022.01); F26B 3/04 (2013.01); F26B 20/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of controlling air flow through an electric heater mixing plenum, wherein the electric heater mixing plenum includes an upstream end, a downstream end, a first chamber, a second chamber adjacently disposed to the first chamber, and a mixing chamber located at the downstream end of the electric heater mixing plenum, comprising:
controlling a first inlet damper and a first outlet damper of a first chamber of the electric heater mixing plenum to open positions to allow air flow through the first chamber, wherein the first chamber includes a resistance-type electric air heater;
controlling a second inlet damper of a second chamber of the electric heater mixing plenum to an open position to allow air flow through the second chamber;
monitoring a property of process air as it exits the mixing chamber of the electric heater mixing plenum;
adjusting the open position of the first inlet damper based on the monitored property; and
adjusting the open position of the second inlet damper based on the monitored property.