Patent ID: 8915679
Filing Date: 2014-12-23
Classification: B65G

Abstract:
1. An ash transport system comprising a first airlock, a second airlock, a transport line, a first airlock valve between the first airlock and the transport line, a second airlock valve between the second airlock and the transport line, a pressure sensor for measuring pressure in the transport line, and a controller configured to control the ash transport system to: open the first airlock valve to transport ash from the first airlock to the transport line upon the pressure falling below a first pressure threshold prior to a predefined period of time elapsing; open the second airlock valve to transport ash from the second airlock to the transport line upon the pressure falling below a second pressure threshold prior to the predefined period of time elapsing, the second pressure threshold being lower than the first pressure threshold; and open the second airlock valve to transport, after the predefined period of time elapses, ash from the second airlock to the transport line upon the pressure falling below a third pressure threshold that is higher than the second pressure threshold.