AIR ASH BLOWING CONTROL SYSTEM FOR FLY ASH CONVEYING PIPELINE OF WASTE INCINERATOR

摘要

An air ash blowing control system for a fly ash conveying pipeline of a waste incinerator, which from top to bottom successively comprises according to a fly ash conveying direction: an ash collecting hopper (1), a front ash pipe (5.1), a rear ash pipe (5.2), a working ash drop pipe (5.3), a submerged chain conveyor (7) and a submerged slag pool.. A J-shaped valve (10) is disposed at a corner at which the front ash pipe (5.1) and the rear ash pipe (5.2) are connected. A normally open ash pipe valve (8.2) is disposed at a corner at which the rear ash pipe (5.2) and the working ash drop pipe (5.3) are connected. A first air distribution pipe (9.1) is disposed in the J-shaped valve (10), and a second air distribution pipe (9.2) is disposed at a front end of the normally open ash pipe valve (8.2). The first air distribution pipe (9.1) and the second air distribution pipe (9.2) are each provided thereon with several small air outlet holes. Compressed air conveying pipes connected to the air distribution pipes are further disposed; and compressed air is separately conveyed to the first air distribution pipe (9.1) and the second air distribution pipe (9.2) by means of the compressed air conveying pipes, thereby blowing away the accumulated fly ash. The compressed air conveying pipes comprise pipelines, and stop valves, solenoid valves and pressure reducing valves of the pipelines that are arranged in order according to the direction of the air flow. Intermittent ash blowing is achieved by intermittently starting and stopping the solenoid valves.