The high clean direct type coal hot air furnace developed by Meibao for the production of detergent powder was first applied for a national patent (ZL03 2 32246 1) in 2003. The high clean direct type biomass hot air furnace was first applied for a national patent (ZL2012 2 0711996.3) in 2012. So far, Meibao has applied for more than 30 national invention Patenti, patenti za komunalne modele, avtorske pravice in druge patente za razvoj visokega čistega neposrednega premogovega/biomase vročega zračnega peči za proizvodnjo prahu detergenta .
Največja značilnost te peči vroče zračne peči je, da lahko izpolnjuje zahteve po belini prahu detergenta in v končnem prahu ni vidnih črnih lis powder production enterprises, such as Unilever, P&G, Henkel, Nice, Liby, Lonkey, Nafine, Lipton Detergent Industrial, Topseller Chemical, Indonesia P.T Wings, India Shivani Detergents, Pakistan Ittahad Chemicals, Zambia Waterland Impex International Trading LLC, Angola M/S Agape General Trading Fze , Yemen Red Sea Detergent Co ., Ltd ., Dominica Mercasid S . a . itd. .
