摘要:
A reduced carbon dioxide emission system and method for providing power for refrigerant compression and shared electrical power for a light hydrocarbon gas liquefaction process.
摘要:
The present invention relates to a device for combustion of a carbon containing fuel in a nitrogen free atmosphere, and a method for operating said device. The device may be integrated with a power generation plant (i.e. gas turbine(s)) to obtain an energy efficient process for generation of power with reduced emission of carbon dioxide and NOx to the atmosphere. Furthermore, the device may be integrated with a chemical plant performing endothermic reactions.
摘要:
A high pressure combustion turbine (109) is integrated with a double column cryogenic air separation system by cooling (111,113) and purifying (115) a portion (11) of the compressed air (6) from the combustion turbine compressor (105), work expanding (118) a first portion (17) of the resulting cooled air (15), and introducing the expanded air (19) into the lower pressure column (119). A second portion (21) of the resulting cooled air (15) is further cooled (117), throttled (121), and introduced (23) into the high pressure column. A nitrogen product stream (35) is returned to the turbine combustor (101), and a portion (41) of the nitrogen product stream optionally is cooled (143,117), throttled (133), and recycled (31) into the higher pressure column (123). Preferably the higher pressure column operates at an absolute pressure which is 20% to 85% of the absolute pressure of the compressed air from the combustion turbine air compressor. Optionally oxygen-rich liquid (33) or nitrogen-rich liquid (45) withdrawn from the higher pressure column (123) during a period of low nitrogen product demand is stored, and withdrawn from storage to supplement feed to the lower pressure column (119) during periods of high nitrogen product demand. Alternatively, high purity liquid oxygen (51) is withdrawn from the lower pressure column (119) during a period of low oxygen product, stored, and withdrawn from storage during periods of high oxygen product demand to supplement oxygen product withdrawn from the higher pressure column.
摘要:
A fluid mixture is separated by distillation in which the feed (101) is prefractionated in a first column (103) having at least one separation stage (105) above or below the feed (101). When the separation stage (105) is above the feed (101), the prefractionator bottoms (125) provides feed to a second distillation column (109) operating at a lower pressure. When the separation stage is below the feed (101), a portion of condensed prefractionator overhead is pressurized and provides feed to a second distillation column. In both cases, no temperature in the first column (103) is greater than the highest temperature or less than the lowest temperature in the second column (109). The two-column system is readily combined with a high pressure column in a three-column distillation system for separating air, which is particularly useful for integration with a gasification combined cycle combustion turbine system.
摘要:
On maintient les conditions de fonctionnement du groupe turbine à gaz (1) au voisinage de celles de production de puissance maximum en sélectionnant, avec l'aide d'une unité de séparation de gaz de l'air associée (7), les paramètres du mélange de gaz de l'air introduit, avec le carburant (24), dans la chambre de combustion (6), notamment en soutirant un débit d'air en sortie du compresseur (2) pour alimenter au moins partiellement l'unité (7) ou en introduisant dans le mélange de gaz de l'air dans la chambre de combustion (6) de l'azote impur produit (9) par l'unité de séparation.
摘要:
1. A cryogenic distillation process for the production of oxygen and nitrogen, which comprises:
a) cooling at least a fraction of a cleaned and dried feed stream (10) containing at least oxygen and nitrogen and introducing the same into a high pressure column (13), and separating the same into nitrogen-rich stream at the top of the column and an oxygen-rich stream at the bottom of the column, wherein the overhead of the high pressure column exchanges heat with both the bottom of the low pressure column (19) and the bottom of an intermediate column (28), b) introducing at least a fraction of the oxygen-rich stream (2) into said intermediate column to afford a top liquid fraction A (32) and a bottom liquid fraction B (21), the overhead of the intermediate column exchanging heat (29) with the low pressure column at a location above the bottom reboiler (30) of the low pressure column, wherein the pressure of the intermediate column is lower than the high pressure column but higher than the low pressure column, c) introducing at least a fraction of the liquid fractions A and B into the low pressure column as feed, d) feeding at least a fraction of the nitrogen-rich stream (22) of step b) to the low pressure column as reflux, and e) recovering an oxygen-rich stream (25) product at the bottom of the low pressure column and a nitrogen-rich stream (24) at the top of the low pressure column.
摘要:
A method and installation is proposed for generating electrical energy in an open circuit for a gaseous fluid, comprising a compressor unit (2) driven by a turbine (4) receiving the compressed fluid after its passage through an exhaust gas heat exchanger (I), said method and installation further comprising a power generator (14) driven by a gas turbine (6), the circuit also comprising a fuel cell (10) receiving natural gas in its anode (AN) from an external source and receiving the gaseous fluid from the compressor unit (2) as an oxidizing agent in its cathode (CA), the electrical power originating from both the generator (14) and the fuel cell (10) forming the output of the method and installation.