彩涂板固化炉的空炉升温时间 

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空炉升温时间受很多因素影响，大致包括以下主要因素:
　　(1)炉子设定的炉温高低。炉温设定越高，空炉升温时间越长，并且越接近设定温度，炉子的升温速度越慢。
　　(2)炉子的保温性能。炉子的保温性能越好，空炉升温时间越短，反之则越长。
　　(3)炉子供热能力。炉子的供热能力越大，空炉升温时间越短，反之则越长。
　　(4)炉子的排气量和补新风量大小。炉子的排气量和补新风量越大，空炉升温时间越长。固化炉在升温阶段，进行了洗炉操作后，由于没有溶剂产生，不存在爆炸危险，所以在保证焚烧炉换热器不被烧坏的前提下，可以适当减小固化炉的补新风量和排废气量以减小炉子的热负荷，达到缩短空炉升温时间的目的。
　　(5)与炉子的加热方式有关。对直接加热固化炉，由于各区有自己的加热系统、所以空炉升温时间短，一般在1～2h以内。对间接加热式固化炉，由于各区的炉温是由焚烧炉产生的热风加热的，而热风温度的提高需要一定时间，所以空炉升温时间较长，一般为2～4h左右。

The so-called empty furnace heating time refers to the time required for the color coated sheet curing furnace to heat from room temperature to process setting temperature when the steel strip is not running.

The temprature rise time of the empty furnace is affected by many factors, including the following main factors:
(1) The furnace temperature set by the furnace. The higher the furnace temperature setting, the longer the empty furnace heating time, and the closer to the set temperature, the slower the furnace heating speed.
(2) The heat preservation performance of the furnace. The better the heat preservation performance of the furnace, the shorter the heating time of the empty furnace, and vice versa.
(3) Heating capacity of furnace. The greater the heating capacity of the furnace, the shorter the heating time of the empty furnace, and vice versa.
(4) The amount of exhaust and fresh air in the furnace. The larger the exhaust and fresh air volume of the furnace, the longer the heating time of the empty furnace. In the heating stage of the solidification furnace, after washing operation, there is no solvent and explosion danger. Therefore, under the premise of ensuring that the heat exchanger of the incinerator is not burned out, the amount of fresh air and exhaust gas can be reduced appropriately to reduce the heat load of the solidification furnace and shorten the heating time of the empty furnace.
(5) It is related to the heating mode of the furnace. For direct heating solidification furnaces, the heating time of empty furnaces is shorter, generally within 1-2 hours, because each zone has its own heating system. For indirectly heated solidification furnaces, because the furnace temperature in each area is heated by hot air generated by incinerator, and the increase of hot air temperature takes a certain time, the heating time of empty furnace is longer, generally about 2-4 hours.