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一、前 言 以2000～3500大气压使乙烯气聚合反应的高压法聚乙烯制造厂,在反应器的循环气体的进口压力与出口压力之间,需要非常大的压差。超高压压缩机的进气压力与以高压分离器分离的未反应循环气的压力相等,即200～300大气压,排气压力达2000～3500大气压。流程的反应效率为16～30％,因未反应气体再循环,超高压压缩机需要处理所反应的供气量的3～6倍。超高压压缩机的排气量及排气压力,在1950年前后是 4～5吨/小时、1800～2500大气压,而目前已达到 15～20吨/小时、2500～3500大气压,进一步趋向于大气量、高压化。 下面论述超高压压缩机的特点及结构。
I. INTRODUCTION The high pressure polyethylene plant, which polymerizes ethylene gas at 2000 to 3500 atmospheres, requires a very large pressure differential between the inlet pressure and the outlet pressure of the recycle gas in the reactor. The pressure of the super-high pressure compressor is equal to the pressure of the unreacted recycle gas separated by the high-pressure separator, that is, 200-300 atm and the exhaust pressure is 2000-3,500 atm. The reaction efficiency of the process is 16 to 30%. Since the unreacted gas is recirculated, the extra-high pressure compressor needs to handle 3 to 6 times the amount of supplied gas. Exhaust volume and discharge pressure of the ultra-high pressure compressor are 4 to 5 tons / hour and 1800 to 2500 at around 1950, and have now reached 15 to 20 tons / hour and 2500 to 3500 atm, and further tend to be large Gas volume, high pressure. The following discusses the characteristics and structure of ultra-high pressure compressor.