Читать книгу Automation of Water Resource Recovery Facilities - Water Environment Federation - Страница 242

Conveyance is typically controlled to run in conjunction with the equipment (screenings, grit, or both) that is providing material for conveyance. Typically, there is some delay between the start of the screen rake or grit removal equipment and the conveyor to account for the time it takes for the material to reach the conveyor. Likewise, the conveyor typically continues operating after rake or grit removal equipment has stopped operation to allow time for the material to reach its destination. For example, a screenings conveyor may only start after a rake has completed one cycle; it may continue for 3 minutes after that time.