Study on the Influence of Furnace Arch Structure on the Combustion Characteristics of Chain Furnace

摘要

In order to study the various furnace arch structure and air distribution on combustion characteristics of chain boiler, based on computational fluid dynamics theory, using numerical simulation method, a three-dimensional physical model for QXL1.4-0.7/95/70-AII type hot water boiler is established, and dividing the grid, setting the boundary conditions, then the process of flue gas flow and combustion were simulated, obtained the temperature field and concentration field in the furnace. The results show that the increase of the length of the front arch and the decrease of the front arch height have a positive effect on the ignition of the fuel; the increase of the back arch cover length and the decrease of the rear arch inclination have the same effect on the ignition and burnout of the fuel The influence of the length of the back arch over the length of the front arch is greater than that of the front arch, and the height of the back arch has little effect on the length of the back arch. In contrast, the front arch is smaller than the rear arch.