ES2632130T3 - Método de refrigeración que utiliza un sistema de refrigeración binario extendido - Google Patents

Método de refrigeración que utiliza un sistema de refrigeración binario extendido Download PDF

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ES2632130T3
ES2632130T3 ES08795049.9T ES08795049T ES2632130T3 ES 2632130 T3 ES2632130 T3 ES 2632130T3 ES 08795049 T ES08795049 T ES 08795049T ES 2632130 T3 ES2632130 T3 ES 2632130T3
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cooling
methane
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Charles Sumner
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Lummus Technology LLC
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Lummus Technology Inc
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
    • F25J3/0605—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the feed stream
    • F25J3/061—Natural gas or substitute natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
    • C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
    • C09K5/042—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising compounds containing carbon and hydrogen only
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0219—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0233—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0238—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 2 carbon atoms or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0252—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of hydrogen
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/10—Components
    • C09K2205/12—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/12—Refinery or petrochemical off-gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/62—Ethane or ethylene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/12—External refrigeration with liquid vaporising loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/18—External refrigeration with incorporated cascade loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/66—Closed external refrigeration cycle with multi component refrigerant [MCR], e.g. mixture of hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/902—Details about the refrigeration cycle used, e.g. composition of refrigerant, arrangement of compressors or cascade, make up sources, use of reflux exchangers etc.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Un método de enfriamiento que comprende enfriar un gas de carga (16; 116) utilizando un refrigerante binario extendido que contiene una mezcla de 10-40% en moles de metano, 60-90% en moles de un hidrocarburo C3 seleccionado del grupo que consiste en propileno y propano, y no más del 2% en moles de hidrógeno, siendo 100% el total de % en moles de metano, de hidrocarburo C3 y de hidrógeno, siendo comprimido dicho refrigerante binario extendido en un compresor multietapa (50; 150) que tiene una primera etapa y una última etapa para proporcionar una corriente de descarga de última etapa (1; 101) que contiene al menos 60% en moles de hidrocarburo C3, y dividiéndose en una corriente de refrigerante líquida (3; 103) y una corriente de refrigerante gaseosa (2; 102) después de la compresión.

Description

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La corriente de vapor 101, que sale del compresor 150, es enfriada por un medio de enfriamiento a temperatura ambiente tal como agua de refrigeración o aire, preferiblemente agua de refrigeración, en un intercambiador de calor 152 hasta cerca de la temperatura ambiente. La corriente mixta de vapor y líquido fluye entonces al tambor separador 154 donde se separa en la corriente de vapor 102 y la corriente líquida 103. En una realización, la corriente de vapor 101 tiene una composición de aproximadamente 10-40% en moles de metano, o aproximadamente 20-30% en moles de metano y aproximadamente 60-90% en moles de propileno, o aproximadamente 70-80% en moles de propileno. La composición depende de la materia prima para los calentadores de craqueo por vapor y las condiciones bajo las cuales el hidrocarburo se craquea, y también si hay corrientes adicionales que contienen olefinas que fluyen a la planta de olefinas para la recuperación de productos. Además, aunque el refrigerante es principalmente una mezcla binaria de metano y propileno, se reconoce que puede contener algo de hidrógeno como consecuencia de la fuente de la carga y composición de metano y puede contener algo de propano como consecuencia de la fuente de la carga y composición de propileno al sistema de refrigeración binario mejorado.
En algunos casos, la corriente de vapor 102 que deja el separador 154 tiene una concentración nominal de metano de 52-55% en moles para un craqueador de nafta típico con proporciones de propileno a etileno de 0,50 a 0,55 que salen del calentador de craqueo. Para materias primas de hidrocarburos más ligeros y mayores intensidades de craqueo del calentador de craqueo, la concentración de metano puede aumentar hasta 65% en moles. Para materias primas más pesadas craqueadas con menor intensidad, la concentración de metano a veces puede disminuir a 45% en moles.
La corriente líquida 103 que sale del separador 154 a veces tiene una concentración nominal de propileno de 80 a 90% en moles. Con condiciones de proceso variables, la concentración de propileno puede ser tan baja como 7075% en moles y tan alta como 92% en moles.
Una parte de la corriente líquida 103, corriente 104, se enfría en el intercambiador de calor 117, típicamente de un núcleo o diseño de intercambiador de aluminio soldado. El enfriamiento se proporciona mediante recalentamiento del proceso tal como está disponible incluyendo la corriente de proceso 106 y dejando caer una parte de la corriente enfriada 104 como la corriente 111, a través de la válvula de control 181, con reducción subsiguiente de presión y temperatura y utilizando esta corriente para proporcionar enfriamiento para las corrientes 102 y 104 y para refrigerar otras cargas de proceso, según se requiera, incluyendo la corriente 123. Esta corriente vaporizada 111 fluye entonces hacia un tambor de descarga dela segunda etapa del compresor 177.
El resto de la corriente 104, después de la retirada de la corriente 111, es la corriente 112 y esta corriente se enfría en el intercambiador 118. Al salir del intercambiador 118, la corriente refrigerada 119 se deja bajar a través de la válvula 182, dando como resultado una reducción de presión y temperatura y luego fluye de nuevo al intercambiador 118 para ser vaporizada y recalentada antes de fluir a un tambor de succión 176 de la segunda etapa del compresor. El enfriamiento también es proporcionado por los recalentadores de proceso disponibles, tales como la corriente
125. La refrigeración proporcionada se utiliza para enfriar corrientes de proceso, según se requiera, tal como la corriente 127, y para enfriar la corriente 102.
La corriente de vapor 102 que ha sido enfriada y parcialmente condensada en los intercambiadores 117 y 118 se enfría adicionalmente y se condensa total o principalmente por enfriamiento consecutivo en los intercambiadores 119, 120 y 121. El enfriamiento en el intercambiador de calor 119 se proporciona mediante el recalentamiento del proceso según se disponga, tal como en la corriente 129, y dejando caer una primera porción de la corriente refrigerada 102, como la corriente 110, a través de la válvula 183, con reducción de presión hasta cerca de la presión de succión del compresor de refrigeración binario extendido 150. La porción restante de la corriente 102 es la corriente 107, y después de pasar a través del intercambiador de calor 120, una porción de esta corriente es bajada como la corriente 108 a través de la válvula de control 184. La porción restante de la corriente 107 es la corriente 115, y esta corriente se enfría en el intercambiador de calor 121. La corriente 115 después de salir del intercambiador 121 es bajada a través de la válvula 185, reduciendo tanto la presión como la temperatura. Esta corriente representa ahora la temperatura más fría del sistema. Al igual que con el sistema de la Figura 1, se utiliza para generar la alimentación del desmetanizador más fría mediante la corriente de refrigeración 128 para formar la corriente líquida 136. Esta corriente 115 parcialmente recalentada se combina entonces con la corriente 108 para formar la corriente 109. No se muestran en la Figura 2 los controladores de temperatura de los vapores 122, 128 y 134 que ajustan las válvulas de descarga 183, 184 y 185 para asegurar la formación de las alimentaciones del desmetanizador 130 y 124.
La corriente 109 se recalienta parcialmente en el intercambiador de calor 120 utilizando recalentamientos del proceso, según se disponga, incluyendo la corriente 133, y se combina con la corriente 110, con la corriente combinada 113 siendo recalentada en el intercambiador de calor 119. La refrigeración proporcionada se utiliza para enfriar y condensar parcialmente la alimentación de tren de enfriamiento 116 que entonces sale del intercambiador 119 y fluye al tambor de separación 126. Una corriente líquida 124 se separa y fluye hacia el desmetanizador. La corriente de vapor 122 que sale del separador 126 fluye hacia el intercambiador de calor 120 donde es enfriada y parcialmente condensada y luego fluye al tambor separador 132. En el tambor 132, la corriente 122 se separa en una corriente líquida 130 y una corriente de vapor 128. La corriente líquida 130 fluye hacia el desmetanizador como alimentación detemperatura intermedia.
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en lugar de tres como en la Figura 2. La corriente de reciclado 506 se dirige finalmente al tambor de descarga de la segunda etapa (succión de la tercera etapa).
Ejemplo
Se realizó una simulación de proceso computarizada en la que se utilizó un refrigerante binario extendido formado a
5 partir de 19% en moles de metano y 80,5% en moles de propileno (que también contenía 0,5% en moles de gas hidrógeno) como refrigerante en el proceso representado en la Fig. 1. Las presiones y composiciones de la corriente de refrigerante ligero 2, la corriente de refrigerante pesado 3 y las etapas de succión del compresor se muestran en la Tabla 1 a continuación. El refrigerante binario extendido proporcionó exitosamente refrigeración en una planta de etileno que tenía un desmetanizador de baja presión, y también se puede usar en una planta que emplea un
10 desmetanizador de alta presión.
Tabla 1
imagen8
Corriente compresióndescarga (1) de o Corriente de refrigerante ligero(2) Corriente refrigerantepesado (3) de Compresión o succión de primeraetapa (14) Succión de segunda etapa(11)
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% Mol imagen10 % Mol % Mol imagen11 % Mol % Mol
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imagen13 imagen14 imagen15 imagen16 imagen17
H2
0,5 imagen18 1,4 <500ppm imagen19 1,2 <500ppm
CH4
19,0 imagen20 41,2 7,4 imagen21 36,7 7,4
C3H6
80,5 imagen22 57,4 92,6 imagen23 62,1 92,6
MW
36,9 imagen24 30,8 40,1 imagen25 32,1 40,1
Presión (psia)
20,83 MPa (410) imagen26 2,79 MPa (405) 2,79 MPa (405) imagen27 0,29 MPa (42) 10,03 MPa (149)
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Claims (1)

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ES08795049.9T 2008-08-06 2008-08-06 Método de refrigeración que utiliza un sistema de refrigeración binario extendido Active ES2632130T3 (es)

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PCT/US2008/009418 WO2010016815A2 (en) 2008-08-06 2008-08-06 Method of cooling using extended binary refrigeration system

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EP (1) EP2326899B1 (es)
JP (1) JP5481480B2 (es)
KR (1) KR101310456B1 (es)
CN (1) CN102216710B (es)
BR (1) BRPI0823027B1 (es)
CA (1) CA2731560C (es)
ES (1) ES2632130T3 (es)
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MY (1) MY180003A (es)
WO (1) WO2010016815A2 (es)

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