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一、结构及底焦燃烧特点倒大双冲天炉是根据我国焦炭条件发展起来的一种炉型。与国外类似炉型的区别是,具有一个风带和风口截面积分配比的倒置。研究表明:当第二排风口截面积与第一排风口截面积的比在60:40～70:30范围内变动时,每排风口的入炉风量比可以与截面积之比相等。因此,实践中可以用调整风口截面积大小的办法来调整和控制每排风口的入炉风量。表1是这种炉型的结构特点及它的主要结构参数。
First, the structure and end coke combustion Features Big cupola is developed according to China’s coke condition of a furnace. With the foreign similar furnace type difference is that with a wind and tuyere cross-sectional area ratio of the inversion. The results show that: when the ratio of cross-sectional area of the second exhaust vent to the cross-sectional area of the first exhaust vent changes within the range of 60:40 to 70:30, the ratio of air flow into each furnace can be equal to the cross-sectional area . Therefore, in practice, the method of adjusting the cross-sectional area of the tuyere can be used to adjust and control the air volume of each vent. Table 1 is the structural characteristics of this furnace type and its main structural parameters.