The sampling of pulverized coal is a main means for testing the property of pulverized coal in a direct-firing type coal pulverizing system

three isokinetic sampling systems have been commonly adopted for pulverized coal at home.The distribution of air flow rate and pulverized coal in burner pipelines is different due to their different positions

and the distribution is fluctuating

hence

the deviation of representativeness for sampled pulverized coal by using different sampling systems is comparatively large.Results of practical application show that the AKOMA sampling system has long time duration of sampling and large amount of samples

being helpful for over coming the influence of fluctuation in air flow rate and pulverized coal distribution inside the coal pulverizing system upon the accuracy of sampling.It is recommended to select suitable sampling system during the time of sampling based on the condition of measuring points.