公开(公告)号：EP3027988A2

公开(公告)日：2016-06-08

申请号：EP14744775.9

申请日：2014-07-29

申请人： Linde Aktiengesellschaft

发明人： ALEKSEEV, Alexander ,  GOLOUBEV, Dimitri ,  ECKERT, Thomas

IPC分类号： F25J3/04

CPC分类号： F25J3/04424 ,  F25J3/04018 ,  F25J3/04024 ,  F25J3/04048 ,  F25J3/04054 ,  F25J3/0406 ,  F25J3/04084 ,  F25J3/04115 ,  F25J3/04121 ,  F25J3/04127 ,  F25J3/04145 ,  F25J3/04175 ,  F25J3/04296 ,  F25J3/04303 ,  F25J3/04339 ,  F25J3/04351 ,  F25J3/04387 ,  F25J3/04393 ,  F25J3/04412 ,  F25J3/04569 ,  F25J3/04781 ,  F25J3/04787 ,  F25J3/04872 ,  F25J3/04878 ,  F25J2200/52 ,  F25J2200/54 ,  F25J2205/04 ,  F25J2230/40 ,  F25J2235/52 ,  F25J2240/04 ,  F25J2240/10 ,  F25J2245/02 ,  F25J2245/40 ,  F25J2270/02

摘要： The invention relates to a method and to a device that serve for producing compressed nitrogen by low-temperature decomposition of air in a distillation column system which has a high-pressure column (202), a low-pressure column (203), a high-pressure column head condenser (204) and a low-pressure column head condenser (205). A main air compressor (9) constitutes the only gas compressor powered by external energy. In the main air compressor (9) the feed air is compressed to a total air pressure which is at least 5 bars above the operating pressure of the high-pressure column (202). A first part-stream (56) of the high-pressure total air stream (11, 811) from the main air compressor (9) is expanded to perform work as operating pressure of the high-pressure column or a higher pressure (57) and is introduced into the distillation column system (201). A second part-stream (52, 55) of the high-pressure total air stream (11, 811) is cooled in a main heat exchanger (51) and is introduced at least partially in liquid form into the distillation column system (206, 210). An internally compressed nitrogen stream is formed by a part-stream (319) of the liquid nitrogen stream (215) from the high-pressure column head condenser (204) and/or a part-stream (234, 334) of the liquid nitrogen stream (232) from the low-pressure column head condenser (205); the internally compressed nitrogen stream is brought in the liquid state to a product pressure (235, 335a, 335b) which is between 15 and 100 bars; then the internally compressed nitrogen stream is heated in the main heat exchanger (51) and then extracted as a gaseous compressed nitrogen product (60) below the product pressure.

摘要翻译： 一种用于在具有高压塔，低压塔，高压塔塔冷凝器和低压塔的蒸馏塔系统中通过空气低温分解来生产压缩氮的方法和装置 头冷凝器。 主要的空气压缩机构成了由外部能源供电的唯一的气体压缩机。 通过来自高压塔塔冷凝器的液氮流的一部分流和/或来自低压塔头冷凝器的液氮流的一部分流形成内部压缩的氮气流; 将内部压缩的氮气流引入液体状态至15至100巴之间的产品压力; 然后将内部压缩的氮气流在主热交换器中加热，然后以低于产品压力的气态压缩氮气产物提取。