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罗克韦尔1746-INT4
液氨在工业上的应用:
· 液氨在国防工业中,用于制造火箭、导弹的推进剂。
· 液氨主要用于生产硝酸、尿素和其他化学肥料,还可用作医药和农药的原料。
· 液氨可用作有机化工产品的氨化原料,还可用作冷冻剂。
液氨制冷原理
标准状态下,氨沸点-33.33摄氏度,熔点-77.7摄氏度,自燃点651.11摄氏度。氨气容易液化,常压下冷却至-33.4摄氏度,或在常温下加压至7-8个大气压,即冷凝成无色的液体氨。在升温或降低压力时,液氨可急剧蒸发,并吸收大量的热。因此,液氨作为制冷剂, 在工业生产中被广泛应用,在国内制冷领域是三大主流制冷剂之一,市场占有率很大。
氨为什么会爆炸?
氨气爆炸极限为15.7~27.4%。常温下氨是一种可燃气体,但较难点燃。易引燃浓度为17%,产生压力时的浓度为22.5%。液氨为液化状态的氨气,是在适当压力下由氨气液化成液氨,一般储存于钢瓶或储罐中。
氨气爆炸原因:
一、储存容器受热后,瓶内压力增大,也极有可能发生爆炸;
二、发生液氨泄漏,会迅速气化成氨气,氨气与空气或氧气混和会形成爆炸性混合物,达到爆炸极限,遇明火后,发生爆炸事故。
1746-INT4
1746-INT4
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