Application of 3D laser scanner and total station in measurement of flue structure parameters of power plants

The quantity of the greenhouse gas emissions from stationary sources is an important indicator of air pollution monitoring. Real-time monitoring of the quantity of greenhouse gas emissions from a stationary source can be achieved by measuring its instantaneous flow rate and carbon oxide emission concentration. Flow rate measurement of stationary emission sources mainly uses velocity-area method. How to ascertain the structural parameters of stationary emission sources is a prerequisite to ensure the accuracy of instantaneous flow rate measurement. Two methods for measuring the flue structural parameters are presented in this paper. By laying the observation site around the flue, the total station can obtain the structural parameters of every external parts of the flue. Under the condition of the known wall thickness of the flue, the internal structure parameters can be calculated. In addition, if the flue has the entrance left for the surveyor, the 3D structure model of the flue can be directly obtained by using the 3D laser scanner with the assistance of the target ball. In this paper, the above two methods are used to measure the structure parameters of a flue in a coal-fired power plant in Henan. The results of the two methods are in good agreement.