Research of power fuel low-temperature vortex combustion in industrial boiler based on numerical modelling

Abstract

The goal of the presented research is to perform numerical modelling of fuel low-temperature vortex combustion in once-through industrial steam boiler. Full size and scaled-down furnace model created with FIRE 3D software and was used for the research. All geometrical features were observed. The baseline information for the low-temperature vortex furnace process are velocity and temperature of low, upper and burner blast, air-fuel ratio, fuel consumption, coal dust size range. The obtained results are: temperature and velocity three dimensional fields, furnace gases and solid fuel ash particles concentration.

Research of the influence of flue gas recirculation on the processes in the ltv furnace

“…Flows directed towards each other and form a couple of forces. It creates a vortex motion in the lower part of the furnace [2]. …”

Impact of the ash deposits from coal combustion on thermal conditions of the furnace pipes

“…Ash and slag accumulates on the heating surfaces and thereby prevents heat output. Therefore, boiler requires higher fuel consumption to maintain the operating conditions [2,3]. We consider a furnace pipe to have a layer of deposits on its surface.…”

Simulation of the furnace of the boiler P-49 in the package of applied programs fire 3D

“…This method of burning is interesting that in his study has identified a number of advantages: stabilization of ignition and combustion, increase thermal efficiency, reduce slagging and contamination of working surfaces, the reduction of emissions of nitrogen oxides and sulfur [1].…”