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Strictly control the quality, particle size and humidity of coal. When inferior coal is used for ignition, fuel consumption will obviously increase. However, no matter how good coal is, it is much cheaper than fuel! Therefore, using high-quality coal to start the fire is the most direct and effective way to save fuel. The bed thickness should be kept above 850mm. Some people believe that too much bed thickness at startup may lead to large air volume and high power consumption. This may be the reason for insisting on using critical air volume for ignition. When the micro-bubble air volume described in this article is used for ignition, the volume flow generated by rapid expansion at a high temperature of 800°C is enough to keep the 950mm bed material in the optimal micro-bubble ignition state. It is best to conduct a cold test when the bed material is added to a height of 450mm, and observe the fluidization conditions under each cold air volume on the bed through the manhole. Based on this, we can infer the relationship between the volume flow after thermal expansion and the flow measurement display value on the DCS screen. When adding bed material, add an appropriate amount of recycled ash that was originally released. Adjusting the output of the oil gun to a sufficient level at one time is also an important measure to ensure safe start-up in cold conditions (but attention should be paid to the controllability of the flue gas temperature to allow the refractory material to slowly heat up). Adding the originally discharged circulating ash to the return valve. Some people think that it is not appropriate to add some originally discharged fine ash to the "J" valve before ignition, but should rely on the short-circuited hot flue gas during startup and the slowly generated circulating ash to heat the separator. ； Practice has proven that adding some fine ash released into the "J" valve before ignition is very necessary for anthracite coal with less ash. The external circulation of the boiler is quickly established to synchronize the temperature rise of the separator lining, circulating ash and bed material, which is conducive to quick start!