Numerical Simulation And Experimental Study For New Biomass Co-firing With Coal Swirl Burner

In recent years, strongly rising of international oil prices have brought the world into high energy era. And many environmental problems caused by the traditional energy usage increase more people's concern. As continued to rise in international oil prices and environmental pressures, the world begin working on renewable energy, new energy sources. Biomass, accounts for 14% of the world's primary energy, which is the fourth after the fossil energy coal. oil and natural gas. There's still mainly in the traditional way of direct combustion for residents in developing countries supplying daily energy, which is low energy usage and serious resources waste.This paper presents a new biomass co-firing pulverized coal swirl burner. Combination of experiment and simulation, using Gambit software to build swirl burner and combustion chamber model, using Fluent software to simulate and compare on coal and biomass combustion of gas-solid flow within the swirl burner and a single fuel burning pulverized coal and biomass combustion. The gas field is calculated the RNG k-εmodel in which gas as a continuum based on the Euler systems, and the calculation of particle-type is based on stochastic model under Lagrangian coordinates which can reflect the complexity of experience and the collision with the wall. By the PISC algorithm coupling particles and fluid, we study the impacts of burner blade angle and other factors on gas filed. We apply non-premixed model in coal combustion and mixed with biomass. After analyzing the velocity field. Temperature field, and the combustion products field, we get the combustion chamber velocity and temperature distribution of co-firing biomass with coal. At last, we determine the characteristics with co-firing coal and biomass.