Air ash blowing control system for fly ash conveying pipeline of garbage incinerator

Abstract

The invention provides an air ash blowing control system for a fly ash conveying pipeline of a garbage incinerator. According to the fly ash conveying direction, the air ash blowing control system sequentially comprises an ash collecting hopper, a front ash pipe, a rear ash pipe, a working ash falling pipe, a slag catching machine and a slag catching pool from top to bottom. a J-shaped valve is arranged at the connecting corner of the front ash pipe and the rear ash pipe, a normally-opened ash pipe valve is arranged at the connecting corner of the rear ash pipe and the working ash falling pipe, a first air distribution pipe is arranged in the J-shaped valve, a second air distribution pipe is arranged at the front end of the normally-opened ash pipe valve, and a plurality of air outlet small holes are formed in the first air distribution pipe and the second air distribution pipe. A compressed air conveying pipeline connected with the air distribution pipes is further arranged. Compressed air is separately conveyed to the first air distribution pipe and the second air distribution pipe through the compressed air conveying pipe so as to blow away accumulated fly ash; and the compressed air conveying pipe comprises a pipeline, a pipeline stop valve, an electromagnetic valve and a pressure reducing valve, wherein the pipeline stop valve, the electromagnetic valve and the pressure reducing valve are sequentially arranged according to the air flow direction; and the electromagnetic valve is intermittently started and stopped to realize intermittent ash blowing.

Description

technical field [0001] The invention relates to a furnace system of a waste incineration power plant, in particular to an air soot blowing control system of a waste incinerator fly ash conveying pipeline. Background technique [0002] At present, the fly ash conveying system of waste incinerator mainly includes ash collection hopper, water-cooled screw ash conveyor, rotary ash unloading valve, removal screw ash conveyor, propulsion screw ash conveyor, slag extractor and slag extractor pool; fly ash After falling into the ash collecting hopper through inertial capture, after passing through the water-cooled screw ash conveyor, it enters the rotary ash unloading valve, then enters the removal screw ash conveyor, and finally enters the propulsion screw ash conveyor through the ash lowering pipe. Due to the complex structure of the water-cooled screw ash conveyor with heat exchange surfaces, the rotating mechanism of the system is huge and complex, and the copper joints of the r...

AI Technical Summary

Problems solved by technology

Due to the complex structure of the water-cooled screw ash conveyor with heat exchange surfaces, the rotating mechanism of the system is huge and complex, and the copper joints of the rotating water pipes of the water-cooled screw ash conveyor are prone to water leakage. Ash valves are rotating equipment with complex structures

During operation, the system is prone to fly ash accumulation jamming, resulting in jamming of rotating parts, motor overload, leakage of heating surface, water leakage of copper joints of rotating water pipes, etc.

System maintenance is difficult and equipment operation costs are high

When a failure occurs, due to the reduced amount of ash falling, the fly ash cannot be removed in time, resulting in the failure of the entire waste incineration power generation system to operate normally

In particular, due to the small gap between the removal of the screw ash conveyor and the push screw ash conveyor, the complex structure of the equipment is easy to jam, and the workload of maintenance is huge, which has a great adverse effect on the operation of the waste incineration power plant.

Images