EXPERIMENTAL STUDY ON MEASURING CONCENTRALTION OF PULVERIZED COAL IN PRIMARY AIR FOR BOILERS USING EXHAUST GAS TO CONVEY THE SAID COAL

In operational parameters of the pulverized coal burner, the measurement of pulverized coal concentration in primary air is very difficult, having no effective monitoring method. Especially for measuring pulverized coal concentration in primary air for boilers using exhaust gas to convey the pulverized coal, there is no feasible method up to now. Hence, it has certain infuence upon thorough study on operational behavior of burners, on operation optimization of them, on equipment retrofitting and improving combustion performance etc.. Througth establishment of test stand for measuring concentration of pulverized coal, the experimental study on measuring concentration of pulverized coal using exhaust gas to convey has been carried out, obtaining linear correlation between static pressure difference before and after mixing pulverized coal with primary air under conditions of constant temperature and fixed gas flow velocity, and the concentration of pulverized coal, providing new thinking and method for measuring concentration of pulverized coal using exhaust gas to convey.