Rapid Analysis Of Coal Quality And Combustion Character By Constant-volume Combustion Method

The coal's quality and combustion character is important to power plant boiler's design and operation. But many power plants use the lab to analysis the coal's quality currently, This traditional way cost much time and has complicated process, in result it can't give the coal's information in time and effectively, even say nothing of the coal's combustion character, So the tradition way can't satisfy the boiler's combustion adjusting and accident analysis. On the other hand, the most advanced rapid coal's analysis apparatus are too expensive to keeps many power plant away from them. So a simple effective way to detect coal's quality and combustion character is very useful to power plant's operation.According to the situation, this paper designs the experiment plan of the Rapid analysis of coal quality and combustion character by constant-volume combustion method, and detailed describes the principle and the experiment processes of this method. It can obtain the P-t and DP-t curve according to detecting the changing of pressure of several kings of coal sample's combustion from ignition to burn-out in the oxygen bomb, furthermore, acquire the density of CO and CO2 in the off-gas. Author get parts of coal sample's quality (calorific value, volatile content) basing the curve of changing of pressure; analysis variety regulation of the coal sample's combustion character (ignition properties, burn-out time) according to the curves of P-t and DP-t; and calculate the carbon content and the burn-out rate of the combustion of coal sample in different condition basing on the density of CO and CO2 in the off-gas. Finally by analyzing the experiment data, the attempt is made to establish the research plan of the constant-volume method, also to provide the feasible engineering project for the rapid measurement of coal quality and combustion character in the power plant.