<prompt> Translate the following text to SwahiliEarly FGD systems were designed with separate quenching, or prescrubber, systems to cool the flue gas coming off the particulate control device.  <response>: FGD mifumo ya mapema walikuwa iliyoundwa na kutoweka tofauti, au prescrubber, mifumo ya baridi flue gesi kuja mbali kifaa cha kudhibiti chembe. 