A STUDY ON AIR FLOW THROUGH AIR INLET VALVE IN THE FLY ASH SYSTEM OF THERMAL POWER BY USED CFD

Abstract

In this paper, the authors present some results of investigating air flow through air inlet valves in the fly ash system of thermal power plants by used a commercial Computational Fluid Dynamic (CFD). The fly ash system is designed to include economiser hopper, air preheater and electrostatic precipitator systems, whereby fly ash is collected gradually and transported in fly ash pipeline system to contain fly ash silo. The fly ash pipeline system is designed, working based on the vacuum principle, using a vacuum pump to generate vacuum pressure, whereby the fly ash will be transported to fly ash silo. The air supply valve is installed at the top of the asphalt branch pipe system, this is the inlet for the air flow to supply the fly ash pipeline system. Researching inlet flow through air supply valve is a necessary basis to calculate the fly ash flow rate, fly ash flow, pressure needed to transport fly ash flow and calculate durability for pipe valves in the system.