MULTIPLE PRESSURE MIXED REFRIGERANT COOLING PROCESS

• Main Authors: KRISHNAMURTHY GOWRI, ROBERTS MARK JULIAN, BROSTOW ADAM ADRIAN
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2019
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; MIXTURES BY PRESSURE AND COLD TREATMENT; REFRIGERATION OR COOLING; WEAPONS

Systems and methods described for increasing capacity and efficiency of natural gas liquefaction processes having a mixed refrigerant precooling system with multiple pressure levels comprising coolingthe compressed mixed refrigerant stream and separating the cooled compressed mixed refrigerant stream into a vapor and liquid portion. The liquid portion provides refrigeration duty to a first precooling heat exchanger. The vapor portion is further compressed, cooled, and condensed, and used to provide refrigeration duty to a second precooling heat exchanger. A flash gas separated from the liquefied natural gas is warmed and combined with the natural gas feed stream. 描述用于提高具有多个压力水平的混合制冷剂预冷系统的天然气液化过程的容量和效率的系统和方法包括冷却压缩的混合制冷剂流并将冷却的压缩混合制冷剂流分离成蒸气和液体部分。液体部分为第预冷却热交换器提供制冷负荷。蒸汽部分被进步压缩、冷却和冷凝，并用于为第二预冷却热交换器提供制冷负荷。将与液化天然气分离的闪蒸气体加热并与天然气进料流合并。