氨蒸发器是年产25000吨合成氨化肥設备之一,盘香管放在氨蒸发器壳体的內部作为液氨热交換面的受热面,以φ51×10毫米的无縫鋼管盘成螺旋形,自外而內同心布置7层。盘香管形状如图1,具体尺寸見表1。其主要技术要求(与弯曲有关的)如下: (1) 管子弯曲后的椭圓度≤1.5毫米。 (2) 平均直徑D≥φ1000时,偏差AD=±10毫米;D<φ1000时,AD=±8毫米。 Ammonia evaporator is an annual output of 25,000 tons of synthetic ammonia fertilizer equipment, the disk incense tube on the inside of the ammonia evaporator shell as the heating surface of liquid ammonia heat exchange surface, with φ51 × 10 mm seamless steel plate into a spiral , Concentrically arranged 7 layers from the outside. Pan incense tube shape shown in Figure 1, the specific size shown in Table 1. The main technical requirements (related to bending) are as follows: (1) ellipticity after bending the tube ≤ 1.5 mm. (2) AD = ± 10 mm for average diameter D ≥ φ1000 and AD = ± 8 mm for D <φ1000.