摘要:
A process and an apparatus are disclosed for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbon components from a hydrocarbon gas stream in a compact processing assembly. The gas stream is cooled and divided into first and second streams. The first stream is further cooled to condense substantially all of it and is thereafter expanded to lower pressure and supplied as the top feed to an absorbing means inside the processing assembly. The second stream is also expanded to lower pressure and supplied as the bottom feed to the absorbing means. A distillation vapor stream is collected from the upper region of the absorbing means and directed into one or more heat exchange means inside the processing assembly to heat it while cooling the gas stream and the first stream. A distillation liquid stream is collected from the lower region of the absorbing means and directed into a heat and mass transfer means inside the processing assembly to heat it and strip out its volatile components while cooling the gas stream. The quantities and temperatures of the feeds to the absorbing means are effective to maintain the temperature of the upper region of the absorbing means at a temperature whereby the major portions of the desired components are recovered in the stripped distillation liquid stream.
摘要:
Systems and methods are provided for sidestream mixing. The system may include a first junction formed from a plurality of conduits. The plurality of conduits may include a first conduit fluidly coupled to a compressor, the first conduit forming a first conduit diameter and configured to flow therethrough a first process fluid stream of a plurality of process fluid streams. The plurality of conduits may also include a second conduit fluidly coupled to the first conduit and the compressor, and configured to flow therethrough a second process fluid stream of the plurality of process fluid streams. The first junction may be disposed a first distance at least three times the first conduit diameter upstream of the compressor, such that the first process fluid stream and the second process fluid stream are mixed and form a first combined process fluid stream prior to being fed into and pressurized in the compressor.
摘要:
The invention relates to a method which includes the following steps: forming an expanded intermediate recirculation current (170) from a liquid (112, 128) obtained during an upstream cooling step and/or intermediate cooling step, upstream from the downstream cooling step; circulating the intermediate recirculation current (170) at least through an upstream heat exchanger (42) in order to cool an upstream stream of cracked gas (102); and injecting the reheated intermediate recirculation stream (170) back into a raw cracked gas (20) upstream from at least one compressor (36, 38) of a cooling and compression stage (24). The upstream, intermediate and downstream cooling steps are performed with no heat exchange, respectively, of an upstream stream of cracked gas (102), an intermediate stream of cracked gas (114) and a downstream stream of cracked gas (140) with an external cooling cycle, such as an ethylene cycle.
摘要:
The invention relates to removing hydrocarbons from a vapour-gas medium which is formed during the oil or gasoline storage or while filling reservoirs therewith and is released to the atmosphere. Said invention can be used in a pumping-ejection unit. The inventive method consists in pumping off and compressing the vapour-gas medium in a liquid-gas jet device (2) by using the energy of oil or gasoline supplied by a pump (1), in separating the thus obtained mixture in a separator (3), in compressing a gas received from the separator (3) in a jet device (5) by the oil or gasoline supplied by a pump (4), in separating the thus obtained mixture is separator (17), in compressing the gas received from the separator (17) in a jet device (16) with the aid of an absorbent supplied by the pump (6), the thus formed mixture is separated in a separator (18) at a pressure maintained within a range of 0.7-2.5 MPa, in discharging a hydrocarbon-free gas medium and in transferring a saturated absorbent to a desorber (7), in which a pressure less than the pressure in the separator (18) is formed, in supplying the regenerated absorbent to the input of the pump (6), in discharging a liquid medium from the separators (3, 17) to a fillable reservoir or to a storage tank (11) from which the oil or gasoline is simultaneously supplied to the input of the pumps (1, 4) or to the separators (3, 17). Said unit can also comprise an additional jet device (31) and a preliminary desorber (35) which is connectable to the separator (18) by the liquid input and to the separator (18) by the gaseous hydrocarbon output thereof. The invention makes it possible to reduce the oil or gasoline losses and the energy consumption and to increase the degree of hydrocarbon removal from the vapour-gas medium which is released to the atmosphere and is formed during the oil or gasoline storage or while filling reservoirs therewith.
摘要:
A process for the fractionation of light refinery products in which the condensed product yields are increased by the use of refrigerant fluids produced by an absorption refrigeration cycle fed with the sensible heat of the hot heavy fractions.
摘要:
L'invention concerne un procédé et une installation de récupération d'hydrocarbures liquides dans une charge gazeuse. Cette installation comprend essentiellement : un compresseur pour comprimer la charge gazeuse (C1) ; une colonne d'absorption (A1) des hydrocarbures en (C5) et plus lourds associée à une colonne de débutanisation (D1) ; une colonne d'absorption (A2) des hydrocarbures en (C3) et plus lourds associée à une colonne de déethanisation (D2) et à un système d'échange (SE) de chaleur relié à un circuit frigorifique. Cette installation permet d'obtenir à partir d'une charge gazeuse issue d'une unité de craquage catalytique, une essence débutanisée (21), une coupe de gaz liquéfiés (hydrocarbures en C3 et C4), et une coupe gazeuse (hydrocarbures en C2 et gaz plus légers) dans laquelle les pertes en hydrocarbures en (C3) et plus sont beaucoup plus faibles que celles obtenues avec les installations actuelles.