Abstract: The burner is the core component of the pulverized coal boiler.The performance of the burner is related to the degree of pulverized coal combustion and the level of pollutant discharge.The thermal test method is used to study the performance of the burner,and the obtained data are more instructive for the development of high-efficiency and low-nitrogen pulverized coal burners.From the basic principles,the advantages and disadvantages of various thermal test methods for pulverized coal combustion and the applicable places were discussed.In the flame temperature measurement,the thermocouple thermometry is simple and convenient,but its accuracy is not high and can only measure temperature at a single point at the same time,which has a large disturbance to the flame.The accuracy of air-pumped high temperature thermometry is higher than that of thermocouples,but its operation is complicated and it is easy to cause interference to the air flow.The spectrometry has sufficient accuracy and less disturbance to the flame,multi-point measurement at the same time,and the measurement can be used to reconstruct the three-dimensional temperature field,but compared with thermocouple thermometry and the air-pumped high temperature thermometry,the spectral method has complex operation and high cost.In the collection of gas-solid phase samples,the cooling sampling method is a common method for accurately collecting real-time components of the flue gas in the burner. Because the specific heat capacity of water is large,the water-cooled sampling method is the most widely used sampling method.XPS and ash tracer are common methods for measuring the chemical composition of coal char samples during pulverized coal combustion. Both can be used for quantitative analysis of solid coal char samples,but the detection focuses of the two methods are different.XPS is mainly used to analyze the composition of chemical functional groups.Trace method focuses on analyzing its elemental composition,calculating coal conversion rate,etc.XPS operation is more tedious,while the gray tracer method is simple to operate.In the detection and analysis of gas samples,a variety of gases can be measured by both electrochemical detection and infrared detection,which has strong applicability,but the infrared detection has a wider detection range.The solution absorption method is suitable for detecting the concentration of NH3 and HCN,which is tedious and difficult to capture in the measurement,and easy to be interfered by other factors,so it has fewer engineering applications.Therefore,when measuring in the field,a variety of measurement methods or multiple measurements are used as far as possible to avoid factors that may cause errors.Three-dimensional temperature field and three-dimensional atmosphere field of the pulverized coal burner in the hot state can be established through a variety of measurement methods. The pulverized coal combustion process and pollutant generation process can be studied in multiple dimensions,so as to take effective measures to control pollution.It is of great significance to the development of burners and the comprehensive treatment of pollutants from pulverized coal industrial boilers.