After the new boiler is installed, it takes a long time before the boiler can be baked.
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Our company has recently installed a 75-ton vulcanized bed boiler. The requirement is that the furnace should be baked one or two days after the installation and brick lining are completed. Is this reasonable requirement?
One or two days is a little less. Here I will introduce to you some of our original operation of the oven. I hope it will be helpful to you. We are also a 75-ton CFB boiler. We used natural ventilation for drying for the first 48 hours, then started the fan for 24 hours of forced ventilation drying, and then started to heat up the oven.
Is it that fast? No, the baking of the castables does not say that it will be baked immediately after installation, at least I have never seen such a thing!
Castables generally have a curing period of seven days. The conditions are slightly different in the trial season. After the curing period, the oven can be used.
Agree with the point above, the curing period of the castable should be considered to ensure the strength and compactness of the lining. If the oven is heated directly without curing after pouring, a large amount of water in the refractory concrete will evaporate quickly. Not only is the setting strength of the refractory cement not guaranteed, but it will also have a great impact on the strength of the refractory concrete. In severe cases, the refractory concrete will lose strength and become loose, and will not be resistant to wear and erosion, which is very fatal to circulating fluidized bed boilers.
If the castables are heated directly in the oven without curing, the strength of the refractory concrete will be greatly affected. In severe cases, the refractory concrete will lose strength and become loose. If it is not resistant to wear and erosion, the oven can be oven-done. After the curing period (seven days later), the oven can be oven-done.
If time permits, the longer the natural ventilation and natural drying time, the better. If you rush to light the furnace, it will take at least seven days of curing. Then, bake in strict accordance with the predetermined oven curve.