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Photo 6: The effect of new mix<strong>in</strong>g nozzle <strong>in</strong> <strong>boiler</strong> no 1 could be seen here. The feeder was<br />
oper<strong>at</strong><strong>in</strong>g <strong>at</strong> 1300 mmWC <strong>at</strong> this time.<br />
Photo 7: The feeder was seen to be under positive pressure <strong>in</strong> <strong>boiler</strong> no 2, where two PA fans<br />
were <strong>in</strong> oper<strong>at</strong>ion. With this puff<strong>in</strong>g, the coal dust would choke up the mix<strong>in</strong>g nozzle <strong>in</strong>let chute<br />
due to dust co<strong>at</strong><strong>in</strong>g the <strong>in</strong>let chute. The caked dust could ultim<strong>at</strong>ely fall <strong>in</strong> to the mix<strong>in</strong>g nozzle<br />
stopp<strong>in</strong>g the coal flow.
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