Measurement and Control of Coal Pipe Temperature of Coal Mills of PF Boiler

摘要

Power plant boiler had no arrangement of measure the coal pipe temperature in acontinuous basis, though it is an important parameter for any coal fired large boiler. As pulverized coalflows through the long coal-pipe by the help of flow of hot air as a carrier, coal pipe temperature is onlythe measurement of the coal flow through the pipe to boiler. Low temperature indicates improper flow ofpulverized coal through the pipe. So due to no continuous measurement of these parameters we can’tknow about the flow profile of coal through pulveriser outlet pipes. Sometimes the pipe got choked andwe were not aware of that for a long time. That caused our equipment loss i.e. we had to stop thepulveriser for a long time for de-choking the large size coal pipe. And indirectly it caused loss of powergeneration and also affected the economical figure of our power house. So to overcome that kind of losseswe have to measure the coal pipe temperature in regular basis.