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由于气位压头的作用,工业炉内不同水平高度具有不同的表压数值:零压面以上为正压,零压面以下为负压。炉壁有门、孔、环缝存在时,将会出现逸气或吸气现象。在工业炉处于正压操作情况下,准确地测试及计算高温炉气的外逸量,对改善工业炉的热工操作、正确地进行工程设计和降低能耗具有重要意义。已发表的炉门逸气量的计算公式是以炉门坎为零压面作前提条件,并且仅限于长方形炉门。不同类型的高温炉窑,根据其工艺和热工过程的不同,不仅炉门坎平面常常处于正压,而且逸气孔、洞的几何形状也是较复杂
Due to the effect of air pressure head, different levels of gauge pressure in industrial furnace have different gauge pressure values: positive pressure above zero pressure surface and negative pressure below zero pressure surface. Furnace wall has doors, holes, ring seam exists, there will be out of gas or inhalation phenomenon. In the case of positive pressure operation of industrial furnaces, it is of great significance to accurately test and calculate the outflow of high temperature furnace gas to improve the thermal operation of industrial furnaces, to correctly carry out engineering design and to reduce energy consumption. The published formula for calculating the amount of furnace gassing is based on the fact that the threshold of the furnace door is a zero pressure surface and is limited to a rectangular furnace door. Different types of high-temperature furnace, according to the different process and thermal process, not only the furnace door is often at a positive pressure plane, and the vent hole, the hole geometry is more complex