<prompt> Translate the following text to EnglishKwa sababu ya interface ndogo ya mitambo kati ya mfumo wa sindano ya sorbent na boiler, upanuzi wa mfumo wa ACI kwa kawaida utahitaji kukatika kwa muda mfupi - wiki moja au chini.  <response>: As a result of the minimal mechanical interface between the sorbent injection system and the boiler, retrofit of an ACI system will typically require a fairly short outage - one week or less. 