一、前 言 过上,作为硫安、硝安等化学肥料用的合成氨,最近由于尿素肥料及铜氨丝、尼龙、煮比等的化学纤维和尿素树脂等扩大了作为工业原料的应用面,并为了降低生产成本,其生产规模在逐渐扩大。 氨合成设备及尿素合成设备中,往复式气体压缩机为重要设备之一,其价格也比较高。因此,作设备计划时,必须注意选择。 氨合成设备大体上分气体发生部门和气体合成部门两部分;而任何一部门都需要气体压缩机。 最近大型化工设备中,都采用效率高且经济的高压气化法,在这种情况下,包括尿素合成的氨合成过程和气体压缩机的关系如衅1所示。 I. INTRODUCTION As the synthetic ammonia used for chemical fertilizers such as Sulfur, Nitrate and other chemical fertilizers, chemical fertilizers such as urea fertilizers and copper ammonia, nylon, cooking ratio, and urea resins have recently been expanded to be used as industrial raw materials. In order to reduce Production costs, its production scale is gradually expanding. Ammonia synthesis equipment and urea synthesis equipment, reciprocating gas compressors as one of the important equipment, the price is relatively high. Therefore, the equipment plan, we must pay attention to the choice. Ammonia synthesis equipment is roughly divided into two parts, the gas generating sector and the gas synthesizing department; gas compressors are required in any sector. In recent large-scale chemical equipment, high-efficiency and economical high-pressure gasification methods are used. In this case, the relation between the ammonia synthesis process including urea synthesis and the gas compressor is as shown in FIG.