US 12,440,796 B2
System for eliminating bad-smelling emissions from industrial processes
Eugenio Olmi, Prato (IT)
Assigned to VALLI ZABBAN S.P.A, Calenzano (IT)
Appl. No. 17/609,342
Filed by VALLI ZABBAN S.P.A, Calenzano (IT)
PCT Filed May 7, 2020, PCT No. PCT/IB2020/054353
§ 371(c)(1), (2) Date Nov. 5, 2021,
PCT Pub. No. WO2020/225775, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 102019000006601 (IT), filed on May 7, 2019.
Prior Publication US 2022/0176302 A1, Jun. 9, 2022
Int. Cl. B01D 47/02 (2006.01); B01D 47/14 (2006.01); B01D 53/14 (2006.01); F23J 15/02 (2006.01)
CPC B01D 47/024 (2013.01) [B01D 47/14 (2013.01); B01D 53/14 (2013.01); F23J 15/022 (2013.01); B01D 2252/60 (2013.01); B01D 2257/702 (2013.01); F23J 2217/50 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A process for treating a raw vent gas containing bitumen vapours released by at least one piece of equipment configured to carry out a step of treating a filler powder, wherein said piece of equipment is supplied with said filler powder and/or performs a mixing operation of said filler powder with said bitumen, during said step of treating said filler powder, said raw vent gas turning from a powder-free normal raw vent gas, into a powder-containing raw vent gas that also contains an amount of said filler powder, said process comprising the steps of:
prearranging a gas-washing device configured to supply a washing solution containing a surfactant;
prearranging a boiler;
first conveying said raw vent gas containing an amount of said filler powder into said gas-washing device;
bringing said raw vent gas containing an amount of said powder into contact with filler said washing solution containing the surfactant;
removing said amount of filler powder from said powder-containing raw vent gas;
releasing, by said gas-washing device a purified vent gas substantially free from said filler powder;
second conveying said purified vent gas into said boiler and burning said purified vent gas, thus obtaining a combustion gas,
wherein said process comprises a step of:
directly conveying said normal raw vent gas into said boiler, wherein said step of directly conveying is discontinued and said steps of first and second conveying are carried out while said at least one piece of equipment performs said step of treating said filler powder.