초록 ▼

A high pressure combustion turbine is integrated with a double column cryogenic air separation system by cooling and purifying a portion of the compressed air from the combustion turbine compressor, work expanding a first portion of the resulting cooled air, and introducing the expanded air into the

A high pressure combustion turbine is integrated with a double column cryogenic air separation system by cooling and purifying a portion of the compressed air from the combustion turbine compressor, work expanding a first portion of the resulting cooled air, and introducing the expanded air into the low pressure column. A second portion of the resulting cooled air is further cooled, throttled, and introduced into the high pressure column. A nitrogen product stream is returned to the turbine combustor, and a portion of the nitrogen product stream optionally is cooled, throttled, and recycled into the high pressure column. Preferably the higher pressure column operates at an absolute pressure which is about 20% to about 85% of the absolute pressure of the compressed air from the combustion turbine air compressor. Optionally an oxygen-rich liquid or a nitrogen-rich liquid is withdrawn from the higher pressure column during a period of low nitrogen product demand, stored, and withdrawn from storage to supplement feed to the lower pressure column during periods of high nitrogen product demand. Alternatively, high purity liquid oxygen is withdrawn from the lower pressure column during a period of low oxygen product, stored, and withdrawn from storage during periods of high oxygen product demand to supplement oxygen product withdrawn from the higher pressure column.

대표청구항 ▼

In an integrated combustion turbine/air separation process which includes compressing air in a combustion turbine air compressor (105), combusting a first portion (7) of the resulting compressed air (6) with a fuel (1) in a combustor (101) to form hot combustion products, expanding the hot combustio

In an integrated combustion turbine/air separation process which includes compressing air in a combustion turbine air compressor (105), combusting a first portion (7) of the resulting compressed air (6) with a fuel (1) in a combustor (101) to form hot combustion products, expanding the hot combustion products (9) in a hot gas expander (103) which drives the combustion turbine air compressor (105) and optionally an electric generator (107), cooling a second portion (11) of the compressed air, removing impurities from the resulting cooled compressed air (14), and separating the resulting purified compressed air (15) into one or more products, the separation of the purified compressed air (15) is carried out by a method which comprises: (a) cooling the purified compressed air (15), work expanding a first portion (17) of the resulting cooled air, and introducing the resulting cooled work-expanded air (19) into a lower pressure distillation column (119); (b) further cooling a second portion (21) of the resulting cooled air, reducing the pressure of the further cooled air (22), and introducing the resulting reduced-pressure cooled air (23) into a higher pressure distillation column (123); (c) withdrawing an oxygen-enriched liquid bottoms stream (33) from the higher pressure distillation column (123), cooling and reducing the pressure of the stream, and introducing the resulting cooled reduced-pressure stream into the lower pressure distillation column (119); and (d) withdrawing a nitrogen-rich product (35) from the lower pressure distillation column (119).