"RECONSTRUCTION OF THE ASH AND SLAG REMOVAL SYSTEM IN CHP-2 OF JSC «ARSELORMITTAL TEMIRTAU»"

Abstract

"This article discusses the modernization of the ash and slag removal system at CHPP-2 of JSC «ArcelorMittal Temirtau», the transition from the wet method of cleaning ash and slag to a more technologically advanced dry one. The long-term use of the hydraulic ash and slag removal system (GZSHU) has led to the accumulation of a huge amount of ash, which is subsequently not used. A comprehensive replacement of wet cleaning equipment for dry cleaning is considered. The wet method offers quenching with water (in this case, up to 1 % of the thermal efficiency of the TP-81 boiler unit is lost), followed by the use of drag pumps and the removal of ash and slag through the hydraulic ash removal channels to the ash dump. In the future, this ash cannot be used. During dry ash and slag removal, extinguishing with water is not used, but a pneumatic system for removing combustion products is used. Ash from gas cleaning plants through a system of pneumatic chamber pumps and intermediate hoppers is fed through ash pipelines to a silo warehouse. The use of this technology allows minimizing the harmful impact on the environment by reducing groundwater pollution with pulp, reducing the area of ​​​​ash dumps, reducing water consumption by the station, using ordinary types of steel in pipeline systems, and reducing the cost of equipment maintenance. Keywords: boiler, slag, ash and slag removal, dust preparation, hydraulic ash removal, fuel, coal, ash."