摘要:
The present invention provides a method of liquefying a contaminated hydrocarbon-containing gas stream: (a) providing a CO2 contaminated hydrocarbon- containing gas stream (20); (b) cooling the contaminated hydrocarbon-containing gas stream to obtain a partially liquefied stream (70); (c) separating the partially liquefied stream obtaining a liquid stream (90); (d) cooling the liquid stream (90) in a direct contact heat exchanger (200) obtaining a multiphase stream (201) containing at least a liquid phase and a solid CO2 phase; (e) separating the multiphase stream in a solid- liquid separator (202) obtaining a CO2 depleted liquid stream (141); (f) passing the CO2 depleted liquid stream (141) to a further cooling, pressure reduction and separation stage to generate a further CO2 enriched slurry stream (206); (g) passing at least part of the further CO2 enriched slurry stream (206) to the direct contact heat exchanger (200) to provide cooling duty to and mix with the liquid stream (90).
摘要:
The invention relates to a method for separating a gas containing carbon dioxide by means of distillation. According to the method, the gas containing at least 50% of carbon dioxide is cooled in a first exchanger (43) so as to produce a cooled fluid, a liquid (23) derived from the cooled fluid is sent to a distillation column (25) to be separated therein, a head gas (6) is withdrawn from the distillation column and reheated in the first exchanger, a vat liquid (27), which is richer in carbon dioxide than the gas containing at least 50% of carbon dioxide, is withdrawn and at least a portion thereof is heated in the first exchanger, at least a first portion of the vat liquid is vaporized in the first exchanger in order to produce a vaporized portion, the vaporized portion (31) is sent back to the column and an NOx removal column is supplied with the liquefied cycle gas (155) produced by vaporizing and reliquefying the vat liquid from the column.
摘要:
Impurities that are less volatile than carbon dioxide, e.g. hydrogen sulfide, are removed from crude carbon dioxide by processes involving distillation of said crude carbon dioxide in a distillation column system operating at super-atmospheric pressure(s) to produce carbon dioxide-enriched overhead vapor and bottoms liquid enriched with said impurities. Where such processes involve a single heat pump cycle, significant savings in power consumption are realized when the distillation column system is re-boiled by at least partially vaporizing liquid in or taken from an intermediate location in the column system.
摘要:
In a method for cooling a flow containing at least 35% carbon dioxide and at least 0.2 µg/Nm3 of mercury, the mercury being in liquid and/or gas form, the flow is cooled in a first brazed aluminium plate-fin heat exchanger (9) from a first temperature to a second temperature higher than -38.6°C to form a cold flow at the second temperature, and the flow cooled to the second temperature is cooled in a second heat exchanger (35), which is a tube and shell heat exchanger, to a third temperature lower than -38.6°C.
摘要:
The invention relates to a process and an installation for precipitating carbon dioxide from a gas mixture (1), wherein in a first process step (20) an intermediate gas (5) having an increased proportion of carbon dioxide is separated, in a second process step (6a-c, 7a-c, 13, 8) the intermediate gas is cooled and compressed in a manner that carbon dioxide gas (12) is liquefied and other fractions of the intermediate gas remain gaseous (11), wherein in a third process step (9) the gaseous fractions are separated from the liquid carbon dioxide.
摘要:
Die Erfindung betrifft ein Verfahren und eine Anlage zum Abscheiden von Kohlendioxid aus einer Gasmischung, wobei in einem ersten Prozessschritt ein Zwischengas mit erhöhtem Anteil von Kohlendioxid abgetrennt wird, wobei in einem zweiten Prozessschritt das Zwischengas in der Weise gekühlt und komprimiert wird, dass Kohlendioxidgas verflüssigt wird und andere Anteile des Zwischengases gasförmig bleiben, wobei in einem dritten Prozessschritt die gasförmigen Anteile von dem flüssigen Kohlendioxid getrennt werden.
摘要:
L'invention concerne un procédé de traitement d'un gaz naturel contenant du dioxyde de carbone dans lequel : - le gaz naturel est séparé par un procédé cryogénique pour fournir d'une part un flux de dioxyde de carbone liquide, contenant des hydrocarbures, et d'autre part du gaz naturel purifié; - au moins une partie du gaz naturel est refroidie dans un premier échangeur de chaleur puis dans un deuxième échangeur de chaleur avant ledit procédé cryogénique et / ou avant un reflux vers ledit procédé cryogénique; - au moins une partie du flux de dioxyde de carbone liquide est récupérée pour fournir un flux de dioxyde de carbone recyclé; - le flux de dioxyde de carbone recyclé est divisé en une première portion et une deuxième portion; - la première portion est détendue puis est réchauffée dans le premier échangeur de chaleur, pour fournir un premier flux de dioxyde de carbone réchauffé; - la deuxième portion est refroidie, puis au moins une partie de la deuxième portion est détendue puis est réchauffée dans le deuxième échangeur de chaleur, pour fournir un deuxième flux de dioxyde de carbone réchauffé; - au moins une partie des hydrocarbures contenus dans le premier flux de dioxyde de carbone réchauffé et dans le deuxième flux de dioxyde de carbone réchauffé sont récupérés par séparation liquide / gaz. L'invention concerne également une installation adaptée à la mise en œuvre de ce procédé.
摘要:
A plant for CO 2 separation is described that has a high security level, minimized energy consumption and can deliver liquid CO 2 from the flue gas of a fossil fired power plant at different purity levels.
摘要:
Method and system for compressing a fluid in a gas phase and for pumping the fluid in a dense phase. The system (10) includes a compressor part (12) having an impeller; a compressor part inlet (32) that receives the fluid in the gas phase; a compressor part outlet (36) that provides the fluid in the gas phase; a temperature changing device (40) that changes a phase of the fluid; a pump part (14) having an impeller; a pump part inlet that receives the fluid in the dense phase from the compressor part outlet; a pump part outlet that outputs the fluid in the dense phase from the system; a single bull gear (20) configured to rotate around an axial axis with a predetermined speed; plural pinions (22) contacting the single gear bull and configured to rotate with predetermined speeds, and a pump shaft (23) configured to rotate the at least one impeller of the pump part.
摘要:
Disclosed are methods of obtaining carbon dioxide from a CO2-containing gas mixture. The methods combine the benefits of gas membrane separation with cryogenic temperatures.