Methods and Systems For Dewatering Bottom Ash Using A Remote Submerged Scraper Conveyor

摘要

A variable flow device that can be used to dewater an ash slurry is described. The variable flow device includes a pipe section having a plurality of adjustable openings in the sidewall. The variable flow device can be can be attached to a slurry discharge pipe and positioned above the horizontal section of a submerged scraper conveyor (SSC) located remotely from a boiler or furnace where bottom ash is generated. A bottom ash dewatering system is also described which includes an SSC having an overflow trough system. The trough system includes trough sections adjacent each of the sides of the SSC and one or more trough connecting sections. The SSC equipped with the variable flow device and/or trough system can receive a high volume wet ash slurry discharge while minimizing particulates overflowing into the overflow trough system.

主权项

1. A variable flow device comprising:
a pipe section comprising a wall extending along an axis, the pipe section having a first end and a second end; a first opening in a first side of the wall of the pipe section; a second opening in the first side of the wall of the pipe section displaced from the first opening along the axis of the pipe section; a first adjustable sleeve around the pipe section adjacent to or covering at least part of the first opening, the first adjustable sleeve adapted to be displaced axially with respect to the pipe section to allow the amount of the first opening covered by the sleeve to be adjusted; and a second adjustable sleeve around the pipe section adjacent to or covering at least part of the second opening, the second adjustable sleeve adapted to be displaced axially with respect to the pipe section to allow the amount of the second opening covered by the sleeve to be adjusted.