WO2018069778A1 - System for recirculating supercritical carbon dioxide, which uses an integrated device for liquefying and storing the fluid - Google Patents

System for recirculating supercritical carbon dioxide, which uses an integrated device for liquefying and storing the fluid Download PDF

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Publication number
WO2018069778A1
WO2018069778A1 PCT/IB2017/055640 IB2017055640W WO2018069778A1 WO 2018069778 A1 WO2018069778 A1 WO 2018069778A1 IB 2017055640 W IB2017055640 W IB 2017055640W WO 2018069778 A1 WO2018069778 A1 WO 2018069778A1
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condenser
carbon dioxide
tubes
temperature
pressure
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PCT/IB2017/055640
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Spanish (es)
French (fr)
Inventor
Elena STASHENKO
Jairo Rene MARTINEZ MORALES
Anderson Julian ARIAS VELANDIA
Sergio Andres BELTRAN MORENO
Omar Armando GELVEZ AROCHA
Sergio Armando RIVERO GEREDA
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Universidad Industrial De Santander
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Publication of WO2018069778A1 publication Critical patent/WO2018069778A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides

Definitions

  • the present invention consists of a recirculation device consisting of a four-step heat exchanger that is capable of liquefying carbon dioxide and storing it in the same device; which has a water-operated cooling subsystem coupled to this exchanger; where carbon dioxide from any process at known conditions of temperature and pressure enters the specially designed exchanger that is responsible for removing heat so that the CO2 at a constant pressure can be liquefied and stored in a liquid state within the same device. In this way it is possible to recover the gaseous C02, so that it can be re-pressurized and used again in the application.
  • This background compresses the liquefied or supercritical carbon dioxide and stores it in a tank, the carbon dioxide can be liquefied or supercritical derived from a heating of the storage tanks.
  • the antecedent does not contemplate the cooling of the gas; while in the new invention carbon dioxide from the supercritical process at known conditions of temperature and pressure, enters the exchanger that is responsible for removing heat so that CO2 at a constant pressure it can be liquefied and stored in a liquid state within the same equipment.
  • the background uses a gas separation apparatus for the removal of solid components; while the new invention has a cleaning step that involves passing the fluid through a filter of porous material and beds of activated carbon and functionalized zeolite so that the residues are captured on the surface of the absorbent material.
  • US Patent US20030161780A1 dated priority 2001 -10-17 called "RECYCLE FOR SUPERCRITICAL CARBON DIOXIDE" by Inventor Henry Howard John Billingham is a background that is designed for the purification and recirculation stage to work continuously, using a bypass that returns the stream of clean and liquid CO2 back to the cleaning and compression stages, wasting energy resources even when the application is not in operation.
  • the present invention does not operate continuously but the fluid is stored in an integrated liquefied tank.
  • the supply of CO2 in the invention is provided on demand, only while the application is running, which also provides freedom to choose the operation flow of the application.
  • This antecedent US20030161780A1 uses a complex system of distillation columns, absorption bed and catalytic oxidant to purify the CO2 flowing with contaminants; while the new invention employs a single packed bed system to perform the specific function of particle separation and impurity retention.
  • the background contemplates the use of a compressor and at least two pumps to prepare the fluid for application, unlike the invention, which does not contemplate the use of a compressor, but rather that CO2 is liquefied at a constant temperature to be sucked. subsequently by the same pump of the application.
  • the recommended pressure to operate the antecedent is half the pressure that would work with the invention.
  • the invention provides freedom to choose the flow of operation in the application, therefore, the supply of CO2 is provided on demand only while the application is running.
  • the new development solves the technical problem of the recirculation of carbon dioxide. Additionally, no devices have been observed that can cool and contain the fluid in the same equipment. This development allows to realize in an integrated stage what would be carried out conventionally in two, liquefaction and storage. This reduces the number of pieces of equipment that must be built which influences savings at the time of manufacture and operation.
  • Figure 1 shows the scheme with the components of the recirculation system of carbon dioxide carbon that uses an integrated fluid blending and storage device.
  • FIG. 2 shows the CO2 condenser
  • Figure 3 shows the type C front head in detail.
  • Figure 4 shows the condenser hull.
  • CO2 in the gaseous state (18) from a process between 45 bar - 55 bar and 20 ° C - 40 ° C passes through two cleaning filters, a first cleaning filter (10) with activated carbon and a second cleaning filter (1 1) with functionalized zeolite located in line. Subsequently, the CO2 in the gaseous state (18) passes through a ball valve (17) that controls the passage to a condenser (12).
  • the CO2 in gaseous state (18) has contact with the external surface of the tubes (13) through which refrigerated water (14) circulates inside it at a temperature between 9 ° C - 1 1 ° C; what it does, at the operating pressure, that the CO2 condenses.
  • the liquid CO2 (19) for recirculation leaves the liquid CO2 outlet of the condenser (12) and passes through a ball valve (20) keeping the CO2 in liquid state; meanwhile the gaseous CO2 is condensed, stored in the same exchanger (12).
  • This type of arrangement involves the manufacture of a single condensing element (12) which in turn stores fluid.
  • the new recirculation system has a condensing unit (16) and has a centrifugal pump (21) adapted for water circulation (14) that passes from the refrigerated water reservoir (15) to the condenser (12).
  • the CO2 Condenser (12) is the component where CO2 recovery, condensation and storage is performed, this condenser (12) is subjected to a pressure that varies between 45 bar to 55 bar depending on the process, this makes the temperature inside must be maintained between 12 ° C and 18 ° C so that condensation is carried out efficiently.
  • the condenser (12) has a storage capacity of 25 kilograms of liquid CO2 to ensure proper operation. Consists of tubes (13), tube holders (23), blind flange (24), blind flange bolts (25), base bolts of tube holder (26), helmet (27), and helmet cup (28 ). In this way the fluid is suitable for being sucked by positive displacement pumps with a minimum density of 850 kg / m 3 .
  • the condenser (12) has a safety valve attached to prevent the increase in pressure in case the electrical flow that maintains the water cooling subsystem is interrupted.
  • This condenser (12) allows both heat transfer requirements as well as CO2 storage requirements to be met.
  • This condenser (12) has a front head type C (29), helmet type E (30) and rear head type U (37); which correspond to the description below:
  • the type C front head (29) has bolts (26), blind flange (24) and tube holder plate (23), which allows cleaning the helmet (30) without having to disassemble the tube bundle (13 ). It consists of a 10 "steel tube (31) with a length of 0.2 meters welded to a blind flange (24) rating 300 that serves as the tube holder plate; T-shaped steel plate (32 ), nipple (33) and nipple (34) with their respective nuts At its opposite end it has a Slip-On rating 150 flange that allows access to the tube bundle (13) as shown in Figure 3.
  • the type E helmet (30) of Figure 4 is configured in the condenser (12) with an upper input and a lower output. It consists of a 10 "steel tube (35) with a length of 1, 1 meters welded to a rear head type U (37) with 10" steel cup on the top and a Slip-On flange (36 ) on the bottom. Figure 4 shows the hull (30) together with the blind flange (24) that composes it.
  • the rear head type U (37) of the condenser (12) has a configuration that allows the four passages through the tubes (13) to be carried out independently without having to involve the helmet (30), facilitating the removal of it for maintenance work. It is made up of the U-shaped bent water circulation tubes (30) folded in a way that allows the cooling water to pass four times through the hull (30) before leaving the condenser (12)
  • the carbon dioxide recirculation system that uses an integrated liquid liquefaction and storage device has the following parameters in its condenser (12): 124 tubes (13), 17 mm transverse passage, 14.7 mm longitudinal passage, 1/2 "pipe diameter, type m copper pipe material, 1 m pipe length, four steps per tube, temperature between 9 ° C-1 1 ° C, pressure in the tubes between 1 bar - 2 bar and mass flow of cooling water of 80 g / min - 120 g / min, CO2 flow with four loudspeakers, separation between loudspeakers of 20 cm, inlet temperature of 20 ° C - 35 ° C, outlet temperature of 12 ° C - 13 ° C, minimum output density 850 kg / m 3 , hull pressure of 55 bar, CO2 mass flow less than 100 g / min and hull diameter 10 ".
  • the condenser (12) is characterized by a helmet with a thickness between 3.45 mm - 9.27 mm, tubes with a thickness between 0.0396 mm - 0.635 mm, a plate holder with a thickness between 16.1 mm - 54 mm, 16 bolts with diameter between 3/4 "- 1", required tightening torque of 1670 Lbf-in, required hull flange thickness between 53.6 mm - 54 mm.
  • the cooling subsystem consists of a water reservoir (15), a pump (21) to move it, an evaporator and a condensing unit (16) that uses R-22 (38) as a cooling liquid to cool the water (14) .
  • This subsystem is responsible for circulating the cooling water through the copper pipes (13) that make up the condenser (12) and CO2 storage.
  • the temperature of the refrigerant inside the copper pipes (13) must be lower than 12 ° C so that the surface temperature of them is less than 12.9 ° C to obtain subcooled CO2 with a minimum density of 850 kg / m 3 .
  • the amount of heat that is required to extract to the CO2 which is calculated to enter a flow of 100 g / min at a temperature of 35 ° C and at a pressure of 55 bar is 360 Watts equivalent to 1230 BTU / h or 310 kcal / h, this at a temperature of the cooling water of 1 1 ° C since the process of condensation of CO2 at 55 bar starts at 18.27 ° C.

Abstract

The present invention relates to a recirculation device comprising a four-pass heat exchanger capable of liquefying carbon dioxide and storing same in the same device, a water-operated cooling subsystem being coupled to this exchanger, wherein the carbon dioxide from any process, at known pressure and temperature conditions, enters the specially designed exchanger, which exchanger removes heat so that the CO2, at a constant pressure, can be liquefied and stored in liquid state in the same device. In this way, it is possible to recover CO2 gas, so that same can be re-pressurised and re-used in the application.

Description

SISTEMA DE RECIRCULACIÓN DE DIÓXIDO DE CARBONO SUPERCRÍTICO QUE USA UN DISPOSITIVO INTEGRADO DE LICUADO Y ALMACENAMIENTO DEL FLUIDO ESFERA TECNOLÓGICA  SUPERCRITICAL CARBON DIOXIDE RECYCLING SYSTEM USING AN INTEGRATED LIQUID AND STORAGE DEVICE FOR TECHNOLOGICAL SPHERE FLUID
La presente invención consiste en un dispositivo de recirculación que consta de un intercambiador de calor de cuatro pasos que es capaz de licuar dióxido de carbono y almacenarlo en el mismo dispositivo; que tiene acoplado a este intercambiador un subsistema de refrigeración operado con agua; donde el dióxido de carbono proveniente de cualquier proceso a condiciones conocidas de temperatura y presión ingresa al intercambiador especialmente diseñado que se encarga de retirar el calor para que el C02 a una presión constante pueda ser licuado y almacenado en estado líquido dentro del mismo dispositivo. De esta manera es posible recuperar el C02 gaseoso, para que este pueda volver a ser presurizado y usado nuevamente en la aplicación.  The present invention consists of a recirculation device consisting of a four-step heat exchanger that is capable of liquefying carbon dioxide and storing it in the same device; which has a water-operated cooling subsystem coupled to this exchanger; where carbon dioxide from any process at known conditions of temperature and pressure enters the specially designed exchanger that is responsible for removing heat so that the CO2 at a constant pressure can be liquefied and stored in a liquid state within the same device. In this way it is possible to recover the gaseous C02, so that it can be re-pressurized and used again in the application.
ESTADO DE LA TÉCNICA STATE OF THE TECHNIQUE
Se conoce de la invención, la solicitud de patente japonesa JP2004249175A con fecha de prioridad 2003-02-18 y fecha de Publicación 2004-09-09 titulada "IMPREGNATION TREATMENT METHOD FOR RECOVERING AND RECYCLING CARBON DIOXIDE AND PRODUCT WHICH IS SUBJECTED TO IMPREGNATION TREATMENT BY THE METHOD" del inventor Keiichi Kikuchi Mitsuhiro Ohashi Itsuro. Esta invención describe la impregnación de sustancias en un material; a diferencia de la invención que nos ocupa como nueva que está diseñada para diferentes procesos fisicoquímicos que involucran al dióxido de carbono como materia prima y específicamente para un proceso extractivo que se lleve a cabo en condiciones supercríticas, pero puede ser aplicado a otros procesos que requieran recircular CO2. Este antecedente comprime el dióxido de carbono licuado o supercrítico y lo almacena en un tanque, el dióxido de carbono puede ser licuado o supercrítico derivado de un calentamiento de los tanques de almacenamiento. El antecedente no contempla el enfriamiento del gas; mientras que en la nueva invención el dióxido de carbono proveniente del proceso supercrítico a condiciones conocidas de temperatura y presión, ingresa al intercambiador que se encarga de retirar el calor para que el CO2 a una presión constante pueda ser licuado y almacenado en estado líquido dentro del mismo equipo. Japanese patent application JP2004249175A with priority date 2003-02-18 and publication date 2004-09-09 entitled "IMPREGNATION TREATMENT METHOD FOR RECOVERING AND RECYCLING CARBON DIOXIDE AND PRODUCT WHICH IS SUBJECTED TO IMPREGNATION TREATMENT BY is known from the invention THE METHOD "by inventor Keiichi Kikuchi Mitsuhiro Ohashi Itsuro. This invention describes the impregnation of substances in a material; unlike the invention that concerns us as new that is designed for different physicochemical processes that involve carbon dioxide as a raw material and specifically for an extractive process that is carried out under supercritical conditions, but can be applied to other processes that require Recirculate CO2. This background compresses the liquefied or supercritical carbon dioxide and stores it in a tank, the carbon dioxide can be liquefied or supercritical derived from a heating of the storage tanks. The antecedent does not contemplate the cooling of the gas; while in the new invention carbon dioxide from the supercritical process at known conditions of temperature and pressure, enters the exchanger that is responsible for removing heat so that CO2 at a constant pressure it can be liquefied and stored in a liquid state within the same equipment.
Además, el antecedente utiliza un aparato de separación de gas para la eliminación de los componentes sólidos; mientras que la nueva invención cuenta con una etapa de limpieza que consiste en hacer pasar el fluido por filtro de material poroso y por lechos de carbón activado y zeolita funcionalizada para que los residuos queden capturados en la superficie del material absorbente. La patente estadounidense US20030161780A1 con fecha de prioridad 2001 -10-17 denominada "RECYCLE FOR SUPERCRITICAL CARBON DIOXIDE" del Inventor Henry Howard John Billingham es un antecedente que está diseñado para que la etapa de purificación y recirculación funcione de manera continua, utilizando un bypass que devuelve la corriente de CO2 limpia y líquida nuevamente a las etapas de limpieza y compresión, gastando recursos energéticos aún cuando la aplicación no esté en operación. La presente invención no opera de manera continua sino que el fluido es almacenado en un tanque integrado de licuado. El suministro de CO2 en la invención se provee por demanda, solamente mientras la aplicación esté funcionando, lo que también proporciona libertad para escoger el flujo de operación de la aplicación. Este antecedente US20030161780A1 utiliza un complejo sistema de columnas de destilación, lecho de absorción y oxidante catalítico para purificar el CO2 que fluye con contaminantes; mientras que la nueva invención emplea un solo sistema de lecho empacado para realizar la función específica de separación de partículas y retención de impurezas. Además, el antecedente contempla el uso de un compresor y al menos dos bombas para preparar el fluido para la aplicación, a diferencia de la invención , que no contempla el uso de compresor, sino que el CO2 es licuado a una temperatura constante para ser succionado posteriormente por la misma bomba de la aplicación. La presión recomendada para operar el antecedente está a la mitad de la presión que funcionaría con la invención. In addition, the background uses a gas separation apparatus for the removal of solid components; while the new invention has a cleaning step that involves passing the fluid through a filter of porous material and beds of activated carbon and functionalized zeolite so that the residues are captured on the surface of the absorbent material. US Patent US20030161780A1 dated priority 2001 -10-17 called "RECYCLE FOR SUPERCRITICAL CARBON DIOXIDE" by Inventor Henry Howard John Billingham is a background that is designed for the purification and recirculation stage to work continuously, using a bypass that returns the stream of clean and liquid CO2 back to the cleaning and compression stages, wasting energy resources even when the application is not in operation. The present invention does not operate continuously but the fluid is stored in an integrated liquefied tank. The supply of CO2 in the invention is provided on demand, only while the application is running, which also provides freedom to choose the operation flow of the application. This antecedent US20030161780A1 uses a complex system of distillation columns, absorption bed and catalytic oxidant to purify the CO2 flowing with contaminants; while the new invention employs a single packed bed system to perform the specific function of particle separation and impurity retention. In addition, the background contemplates the use of a compressor and at least two pumps to prepare the fluid for application, unlike the invention, which does not contemplate the use of a compressor, but rather that CO2 is liquefied at a constant temperature to be sucked. subsequently by the same pump of the application. The recommended pressure to operate the antecedent is half the pressure that would work with the invention.
Otro antecedente es la patente US6960242B2 con fecha de prioridad 2002-10-02 denominada "CO2 RECOVE RY PROCESS FOR SUPERCRITICAL EXTRACTION" del inventor Kelly Leitch Gavin Hartigan Robert D'Orazio donde el dióxido de carbono recirculado no se almacena en estado líquido como en la nueva invención. La refrigeración del antecedente no opera con agua y en el antecedente, el proceso de reciclo está compuesto por dos etapas: una de alta y otra de baja presión; a diferencia de la invención que integra en una etapa la licuefacción y almacenamiento del fluido. REVELACIONES DE LA INVENCIÓN Another background is US6960242B2 patent with priority date 2002-10-02 called "CO2 RECOVE RY PROCESS FOR SUPERCRITICAL EXTRACTION" of the inventor Kelly Leitch Gavin Hartigan Robert D'Orazio where the recirculated carbon dioxide is not stored in liquid state as in the new invention The refrigeration of the antecedent does not operate with water and in the antecedent, the recycling process is composed of two stages: one of high and another of low pressure; unlike the invention that integrates in one stage the liquefaction and storage of the fluid. DISCLOSURES OF THE INVENTION
Si bien existen en el estado de la técnica otros aparatos con una funcionalidad similar, no existe ninguna solución tecnológica que integre en un dispositivo los dos procesos de licuado y almacenamiento en una sola etapa de recirculación con las características de la presente invención. En el sistema están presentes todos los detalles de recirculación de CO2 tales como limpieza del solvente, licuado y almacenamiento, pero de forma integrada. De esta manera se supera el prejuicio de separar las etapas de licuado y almacenamiento porque la invención es un dispositivo que permite realizar estas dos etapas en una sola. El resultado de aplicar este desarrollo no altera las características del producto de la aplicación, así que las ventajas de la técnica se mantienen.  Although there are other devices with similar functionality in the state of the art, there is no technological solution that integrates the two liquefaction and storage processes in a single recirculation stage into one device with the characteristics of the present invention. In the system are all the details of CO2 recirculation such as solvent cleaning, liquefying and storage, but in an integrated way. In this way the prejudice of separating the stages of liquefying and storage is overcome because the invention is a device that allows these two stages to be performed in one. The result of applying this development does not alter the product characteristics of the application, so the advantages of the technique remain.
Adicionalmente, la invención proporciona libertad para escoger el flujo de operación en la aplicación, pues, el suministro de CO2 se provee por demanda solamente mientras la aplicación está funcionando. Additionally, the invention provides freedom to choose the flow of operation in the application, therefore, the supply of CO2 is provided on demand only while the application is running.
El nuevo desarrollo soluciona el problema técnico de la recirculación del dióxido de carbono. Adicionalmente, no se han observado dispositivos que puedan enfriar y contener el fluido en el mismo equipo. Este desarrollo permite realizar en una etapa integrada lo que se llevaría a cabo convencionalmente en dos, licuefacción y almacenamiento. Esto reduce el número de partes de equipo que deben ser construidas lo cual influye en ahorros al momento de su fabricación y operación. The new development solves the technical problem of the recirculation of carbon dioxide. Additionally, no devices have been observed that can cool and contain the fluid in the same equipment. This development allows to realize in an integrated stage what would be carried out conventionally in two, liquefaction and storage. This reduces the number of pieces of equipment that must be built which influences savings at the time of manufacture and operation.
La solución provista a dicho problema técnico no podría ser obvia para un técnico versado en la materia ya que ninguno de los documentos relacionados en el estado de la técnica permiten derivar de su contenido la solución propuesta por la invención objeto de análisis, ni siquiera el antecedente más cercano a la invención, patente US6960242B2, permite inferir el nuevo procedimiento utilizado. The solution provided to this technical problem could not be obvious to a technician well versed in the field since none of the documents related to the state of the art allow the solution proposed by the invention under analysis to be derived from its content, not even the background. Closer to the invention, US6960242B2 patent, allows to infer the new procedure used.
BREVE DESCRIPCION DE LAS FIGURAS A continuación, se presenta una breve descripción de figuras y la manera de ejecutar la invención con la relación de cada uno de los componentes en la descripción asociados en cada figura: La figura 1 muestra el esquema con los Componentes del sistema de recirculación de dióxido de carbono que usa un dispositivo integrado de licuado y almacenamiento del fluido. BRIEF DESCRIPTION OF THE FIGURES The following is a brief description of figures and how to execute the invention with the relationship of each of the components in the description associated in each figure: Figure 1 shows the scheme with the components of the recirculation system of carbon dioxide carbon that uses an integrated fluid blending and storage device.
La figura 2 muestra el condensador de CO2.  Figure 2 shows the CO2 condenser.
La figura 3 muestra el cabezal frontal tipo C de manera detallada. Figure 3 shows the type C front head in detail.
La figura 4 muestra el casco del condensador. Figure 4 shows the condenser hull.
MEJOR MANERA DE EJECUTAR LA INVENCIÓN BETTER WAY TO EXECUTE THE INVENTION
En este nuevo sistema de recirculación de dióxido de carbono que usa un dispositivo integrado de licuado y almacenamiento del fluido, el CO2 en estado gaseoso (18) proveniente de un proceso entre 45 bar - 55 bar y 20°C - 40°C pasa por dos filtros de limpieza, un primer filtro de limpieza (10) con carbón activado y un segundo filtro de limpieza (1 1 ) con zeolita funcionalizada ubicados en línea. Posteriormente el CO2 en estado gaseoso (18) pasa por una válvula de bola (17) que controla el paso a un condensador (12). El CO2 en estado gaseoso (18) tiene contacto con la superficie externa de los tubos (13) por los cuales circula en su interior agua refrigerada (14) a una temperatura de entre 9 °C - 1 1 °C; lo que hace, a la presión de operación, que el CO2 se condense.  In this new system of recirculation of carbon dioxide using an integrated device for liquefying and storing the fluid, CO2 in the gaseous state (18) from a process between 45 bar - 55 bar and 20 ° C - 40 ° C passes through two cleaning filters, a first cleaning filter (10) with activated carbon and a second cleaning filter (1 1) with functionalized zeolite located in line. Subsequently, the CO2 in the gaseous state (18) passes through a ball valve (17) that controls the passage to a condenser (12). The CO2 in gaseous state (18) has contact with the external surface of the tubes (13) through which refrigerated water (14) circulates inside it at a temperature between 9 ° C - 1 1 ° C; what it does, at the operating pressure, that the CO2 condenses.
El CO2 líquido (19) para recirculación sale por la salida de CO2 líquido del condensador (12) y pasa por una válvula de bola (20) manteniendo el CO2 en estado líquido; mientras tanto el CO2 gaseoso es condensado, almacenado en el mismo intercambiador (12). Este tipo de disposición implica la fabricación de un sólo elemento condensador (12) que a su vez almacena fluido. El nuevo sistema de recirculación tiene una unidad condensadora (16) y tiene adaptada una bomba centrifuga (21 ) para circulación de agua (14) que pasa del reservorio de agua refrigerada (15) al condensador (12). The liquid CO2 (19) for recirculation leaves the liquid CO2 outlet of the condenser (12) and passes through a ball valve (20) keeping the CO2 in liquid state; meanwhile the gaseous CO2 is condensed, stored in the same exchanger (12). This type of arrangement involves the manufacture of a single condensing element (12) which in turn stores fluid. The new recirculation system has a condensing unit (16) and has a centrifugal pump (21) adapted for water circulation (14) that passes from the refrigerated water reservoir (15) to the condenser (12).
El Condensador de CO2 (12) es el componente donde se realiza la recuperación, condensación y almacenamiento del CO2, este condensador (12) está sometido a una presión que varía entre 45 bar a 55 bar dependiendo del proceso, esto hace que la temperatura de su interior se deba mantener entre los 12°C y 18°C para que la condensación se realice de manera eficiente. El condensador (12) tiene una capacidad de almacenamiento de 25 kilogramos de CO2 líquido para garantizar el correcto funcionamiento. Consta de tubos (13), porta- tubos (23), brida ciega (24), pernos de brida ciega (25), pernos de base del porta- tubos (26), casco (27), y copa de casco (28). De esta manera el fluido es apto para ser succionado por bombas de desplazamiento positivo con una densidad mínima de 850 kg/m3. El condensador (12) tiene acoplada una válvula de seguridad para evitar el incremento de la presión en caso de que se interrumpa el flujo eléctrico que mantiene el subsistema de enfriamiento de agua. The CO2 Condenser (12) is the component where CO2 recovery, condensation and storage is performed, this condenser (12) is subjected to a pressure that varies between 45 bar to 55 bar depending on the process, this makes the temperature inside must be maintained between 12 ° C and 18 ° C so that condensation is carried out efficiently. The condenser (12) has a storage capacity of 25 kilograms of liquid CO2 to ensure proper operation. Consists of tubes (13), tube holders (23), blind flange (24), blind flange bolts (25), base bolts of tube holder (26), helmet (27), and helmet cup (28 ). In this way the fluid is suitable for being sucked by positive displacement pumps with a minimum density of 850 kg / m 3 . The condenser (12) has a safety valve attached to prevent the increase in pressure in case the electrical flow that maintains the water cooling subsystem is interrupted.
Este condensador (12) permite cumplir tanto con los requerimientos de transferencia de calor así como con los requerimientos de almacenamiento de CO2. Este condensador (12) tiene un cabezal frontal tipo C (29), casco tipo E (30) y cabezal posterior tipo U (37); que corresponden a la descripción a continuación: This condenser (12) allows both heat transfer requirements as well as CO2 storage requirements to be met. This condenser (12) has a front head type C (29), helmet type E (30) and rear head type U (37); which correspond to the description below:
El cabezal frontal tipo C (29) tiene pernos (26), brida ciega (24) y placa porta-tubos (23), que permite realizar las labores de limpieza al casco (30) sin tener que desmontar el haz de tubos (13). Se compone de un tubo de acero de 10" (31 ) con una longitud de 0,2 metros soldado a una brida ciega (24) rating 300 que hace la función de la placa porta tubos; chapa de acero en forma de T (32), niple (33) y niple (34) con sus respectivas tuercas. En su extremo opuesto tiene una brida Slip-On rating 150 que permite el acceso al haz de tubos (13) como se muestra en la figura 3. The type C front head (29) has bolts (26), blind flange (24) and tube holder plate (23), which allows cleaning the helmet (30) without having to disassemble the tube bundle (13 ). It consists of a 10 "steel tube (31) with a length of 0.2 meters welded to a blind flange (24) rating 300 that serves as the tube holder plate; T-shaped steel plate (32 ), nipple (33) and nipple (34) with their respective nuts At its opposite end it has a Slip-On rating 150 flange that allows access to the tube bundle (13) as shown in Figure 3.
El casco tipo E (30) de la figura 4 se configura en el condensador (12) con una entrada superior y una salida inferior. Se compone de un tubo de acero de 10" (35) con una longitud de 1 ,1 metros soldado a un cabezal posterior tipo U (37) con copa de acero de 10" en la parte superior y una brida Slip-On (36) en la parte inferior. La figura 4 muestra el casco (30) junto con la brida ciega (24) que lo compone. The type E helmet (30) of Figure 4 is configured in the condenser (12) with an upper input and a lower output. It consists of a 10 "steel tube (35) with a length of 1, 1 meters welded to a rear head type U (37) with 10" steel cup on the top and a Slip-On flange (36 ) on the bottom. Figure 4 shows the hull (30) together with the blind flange (24) that composes it.
El cabezal posterior tipo U (37) del condensador (12) tiene una configuración permite realizar los cuatro pasos por los tubos (13) de manera independiente sin tener que involucrar el casco (30), facilitando el retiro del mismo para las labores de mantenimiento. Se compone de los tubos (30) de circulación de agua (14) refrigerante doblados en forma de U de tal manera que le permita al agua refrigerante pasar cuatro veces por el casco (30) antes de abandonar el condensador (12) The rear head type U (37) of the condenser (12) has a configuration that allows the four passages through the tubes (13) to be carried out independently without having to involve the helmet (30), facilitating the removal of it for maintenance work. It is made up of the U-shaped bent water circulation tubes (30) folded in a way that allows the cooling water to pass four times through the hull (30) before leaving the condenser (12)
El sistema de recirculación de dióxido de carbono que usa un dispositivo integrado de licuado y almacenamiento del fluido tiene los siguientes paramentos en su condensador (12): 124 tubos (13), paso transversal de 17 mm, paso longitudinal de 14,7 mm, diámetro de los tubos de 1/2", material de tubos cobre tipo m, longitud de tubos de 1 m, cuatro pasos por tubo, temperatura entre 9°C-1 1 °C, presión en los tubos entre 1 bar - 2 bar y flujo másico de agua refrigerante de 80 g/min - 120 g/min, flujo de CO2 con cuatro bafles, separación entre bafles de 20 cm, temperatura entrada de 20°C - 35°C, temperatura salida de 12°C - 13°C, densidad mínima de salida 850 kg/m3, presión en el casco de 55 bar, flujo másico de CO2 menor de 100 g/min y diámetro de casco 10". The carbon dioxide recirculation system that uses an integrated liquid liquefaction and storage device has the following parameters in its condenser (12): 124 tubes (13), 17 mm transverse passage, 14.7 mm longitudinal passage, 1/2 "pipe diameter, type m copper pipe material, 1 m pipe length, four steps per tube, temperature between 9 ° C-1 1 ° C, pressure in the tubes between 1 bar - 2 bar and mass flow of cooling water of 80 g / min - 120 g / min, CO2 flow with four loudspeakers, separation between loudspeakers of 20 cm, inlet temperature of 20 ° C - 35 ° C, outlet temperature of 12 ° C - 13 ° C, minimum output density 850 kg / m 3 , hull pressure of 55 bar, CO2 mass flow less than 100 g / min and hull diameter 10 ".
El condensador (12) se caracteriza por un casco con espesor entre 3,45 mm - 9,27 mm, tubos con espesor entre 0,0396 mm - 0,635 mm, placa porta tubos con espesor entre 16,1 mm - 54 mm, 16 pernos con diámetro entre 3/4" - 1 ", torque de apriete requerido de 1670 Lbf-in, espesor requerido de la brida para el casco entre 53,6 mm - 54 mm. The condenser (12) is characterized by a helmet with a thickness between 3.45 mm - 9.27 mm, tubes with a thickness between 0.0396 mm - 0.635 mm, a plate holder with a thickness between 16.1 mm - 54 mm, 16 bolts with diameter between 3/4 "- 1", required tightening torque of 1670 Lbf-in, required hull flange thickness between 53.6 mm - 54 mm.
El subsistema de refrigeración se compone de un reservorio de agua (15), una bomba (21 ) para desplazarla, un evaporador y una unidad condensadora (16) que emplea como líquido refrigerante R-22 (38) para enfriar el agua (14). Este subsistema se encarga de hacer circular el agua refrigerante por los tubos (13) de cobre que conforman el condensador (12) y almacenador de CO2. La temperatura del refrigerante dentro de los tubos (13) de cobre deberá ser inferior a los 12°C de tal forma que la temperatura superficial de los mismos sea menor de 12,9°C para obtener CO2 subenfriado con una densidad mínima de 850 kg/m3. La cantidad de calor que se requiere extraer al CO2 el cual se calcula que ingresa a un flujo de 100 g/min a una temperatura de 35°C y a unas condiciones de presión de 55 bar es de 360 Watts equivalentes a 1230 BTU/h ó 310 kcal/h, esto a una temperatura del agua refrigerante de 1 1 °C ya que el proceso de condensación del CO2 a 55 bar se inicia a los 18,27°C. The cooling subsystem consists of a water reservoir (15), a pump (21) to move it, an evaporator and a condensing unit (16) that uses R-22 (38) as a cooling liquid to cool the water (14) . This subsystem is responsible for circulating the cooling water through the copper pipes (13) that make up the condenser (12) and CO2 storage. The temperature of the refrigerant inside the copper pipes (13) must be lower than 12 ° C so that the surface temperature of them is less than 12.9 ° C to obtain subcooled CO2 with a minimum density of 850 kg / m 3 . The amount of heat that is required to extract to the CO2 which is calculated to enter a flow of 100 g / min at a temperature of 35 ° C and at a pressure of 55 bar is 360 Watts equivalent to 1230 BTU / h or 310 kcal / h, this at a temperature of the cooling water of 1 1 ° C since the process of condensation of CO2 at 55 bar starts at 18.27 ° C.

Claims

REIVINDICACIONES:  CLAIMS:
Sistema de recirculación de dióxido de carbono CARACTERIZADO por un intercambiador de calor de cuatro pasos que licúa el dióxido de carbono y lo almacena en el mismo dispositivo; que tiene acoplado a este intercambiador un subsistema de refrigeración operado con agua; donde el dióxido de carbono proveniente de una aplicación a condiciones conocidas de temperatura y presión ingresa al intercambiador que se encarga de retirar el calor para que el CO2 a una presión constante pueda ser licuado y almacenado en estado líquido dentro del mismo dispositivo; con esto el CO2 puede volver a ser presurizado y usado nuevamente ya que el sistema se compone por dos filtros de limpieza, un primer filtro de limpieza (10) con carbón activado y un segundo filtro de limpieza (1 1 ) con zeolita funcionalizada ubicados en línea por donde pasa el CO2 en estado gaseoso (18) proveniente de la aplicación con presión entre 45 bar - 55 bar y 20°C - 40°C, una válvula de bola (17) que controla el paso de CO2 en estado gaseoso a un condensador (12), en donde el CC en estado gaseoso (18) tiene contacto con la superficie externa de los tubos (13) a la presión de operación a la que se condensa el CO2, por los cuales circula en su interior agua refrigerada (14) a una temperatura de entre 9 °C - 1 1 °C. Carbon dioxide recirculation system CHARACTERIZED by a four-step heat exchanger that liquefies the carbon dioxide and stores it in the same device; which has a water-operated cooling subsystem coupled to this exchanger; where carbon dioxide from an application at known conditions of temperature and pressure enters the exchanger that is responsible for removing heat so that CO2 at a constant pressure can be liquefied and stored in a liquid state within the same device; With this, the CO2 can be pressurized and used again as the system consists of two cleaning filters, a first cleaning filter (10) with activated carbon and a second cleaning filter (1 1) with functionalized zeolite located in line through which the CO2 passes in the gaseous state (18) from the application with pressure between 45 bar - 55 bar and 20 ° C - 40 ° C, a ball valve (17) that controls the passage of CO2 in the gaseous state to a condenser (12), where the CC in gaseous state (18) has contact with the external surface of the pipes (13) at the operating pressure to which the CO2 condenses, through which refrigerated water circulates inside (14) at a temperature between 9 ° C - 1 1 ° C.
Sistema de recirculación de dióxido de carbono de acuerdo con la reivindicación 1 CARACTERIZADO por que el dispositivo integrado de licuado y almacenamiento del fluido se compone de un condensador (12) con una válvula de CO2 (20) por la que pasa el CO2 líquido (19) para recirculación; un condensador (12) que condensa CO2 y que almacena el CO2 en el mismo recipiente; una bomba centrifuga (21 ) para circulación de agua (14) que pasa de un reservorio de agua refrigerada (15) al condensador (12) y una unidad condensadora (16). Sistema de recirculación de dióxido de carbono de acuerdo con la reivindicación 1 CARACTERIZADO por que el condensador (12) tiene una capacidad de almacenamiento de 25 kilogramos de CO2 líquido para garantizar el correcto funcionamiento y consta de tubos (13), porta-tubos (23), brida ciega (24), pernos de brida ciega (25), pernos de base del porta-tubos (26), casco (27), y copa de casco (28).  Carbon dioxide recirculation system according to claim 1 CHARACTERIZED in that the integrated liquid liquefaction and storage device consists of a condenser (12) with a CO2 valve (20) through which the liquid CO2 passes (19 ) for recirculation; a condenser (12) that condenses CO2 and stores the CO2 in the same container; a centrifugal pump (21) for water circulation (14) that passes from a refrigerated water reservoir (15) to the condenser (12) and a condensing unit (16). Carbon dioxide recirculation system according to claim 1 CHARACTERIZED in that the condenser (12) has a storage capacity of 25 kilograms of liquid CO2 to ensure proper operation and consists of tubes (13), tube holders (23 ), blind flange (24), blind flange bolts (25), base bolts of tube holder (26), helmet (27), and helmet cup (28).
Sistema de recirculación de dióxido de carbono de acuerdo con la reivindicación 1 CARACTERIZADO por que el fluido CO2 líquido es succionado por bombas de desplazamiento positivo con una densidad mínima de 850 kg/m3. Carbon dioxide recirculation system according to claim 1 CHARACTERIZED by the fact that the liquid CO2 fluid is sucked by pumps positive displacement with a minimum density of 850 kg / m 3 .
Sistema de recirculación de dióxido de carbono de acuerdo con la reivindicación 1 CARACTERIZADO porque el condensador (12) tiene acoplada una válvula de seguridad para evitar el incremento de la presión en caso de que se interrumpa el flujo eléctrico que mantiene el subsistema de enfriamiento de agua. Carbon dioxide recirculation system according to claim 1 CHARACTERIZED in that the condenser (12) has a safety valve attached to avoid increasing the pressure in case the electrical flow that maintains the water cooling subsystem is interrupted .
Sistema de recirculación de dióxido de carbono de acuerdo con la reivindicación 1 CARACTERIZADO por que el condensador (12) tiene cabezal frontal tipo C (29), casco tipo E (30) y cabezal posterior tipo U (37); donde el cabezal frontal tipo C (29) tiene pernos (26), brida ciega (24) y placa porta-tubos (23), que permite realizar las labores de limpieza al casco (30) sin tener que desmontar el haz de tubos (13) y se compone de un tubo de acero de 10" (31 ) con una longitud de 0,2 metros soldado a una brida ciega (24) rating 300 que hace la función de la placa porta tubos; chapa de acero en forma de T (32), niple (33) y niple (34) con sus respectivas tuercas y en su extremo opuesto tiene una brida Slip-On rating 150 que permite el acceso al haz de tubos (13); el casco tipo E (30) se configura en el condensador (12) con una entrada superior y una salida inferior que tiene un tubo de acero de 10" (35) con una longitud de 1 ,1 metros soldado a un cabezal posterior tipo U (37) con copa de acero de 10" en la parte superior y una brida Slip-On (36) en la parte inferior; y donde el cabezal posterior tipo U del condensador (12) tiene una configuración que permite realizar los cuatro pasos por los tubos (13) de manera independiente sin tener que involucrar el casco (30), facilitando el retiro del mismo para las labores de mantenimiento y se compone de los tubos (13) de circulación de agua (14) refrigerante doblados en forma de U de tal manera que le permita al refrigerante pasar cuatro veces por el casco (30) antes de abandonar el condensador (12). Carbon dioxide recirculation system according to claim 1 CHARACTERIZED in that the condenser (12) has a front head type C (29), helmet type E (30) and rear head type U (37); where the type C front head (29) has bolts (26), blind flange (24) and tube holder plate (23), which allows cleaning the helmet (30) without having to disassemble the tube bundle ( 13) and consists of a 10 "steel tube (31) with a length of 0.2 meters welded to a blind flange (24) rating 300 that serves as the tube holder plate; steel sheet in the form of T (32), nipple (33) and nipple (34) with their respective nuts and at its opposite end has a Slip-On rating 150 flange that allows access to the tube bundle (13); the E-type hull (30) It is configured in the condenser (12) with an upper inlet and a lower outlet that has a 10 "steel tube (35) with a length of 1.1 meters welded to a rear head type U (37) with a steel cup 10 "at the top and a Slip-On flange (36) at the bottom; and where the rear U-type head of the condenser (12) has a configuration that allows you to perform the four steps through the tubes os (13) independently without having to involve the helmet (30), facilitating the removal of the helmet for maintenance work and is composed of the U-shaped coolant water circulation tubes (13) folded such that it allows the refrigerant to pass four times through the hull (30) before leaving the condenser (12).
Sistema de recirculación de dióxido de carbono de acuerdo con la reivindicación 1 CARACTERIZADO por que el condensador (12) dispositivo integrado de licuado y almacenamiento del fluido tiene los siguientes parámetros en su condensador (12): 124 tubos (13), paso transversal de 17 mm, paso longitudinal de 14,7 mm, diámetro de los tubos de 1/2", material tubos cobre tipo m, longitud tubos de 1 m, cuatro pasos por tubo, temperatura entre 9°C-1 1 °C, presión en los tubos entre 1 bar - 2 bar y flujo másico de agua refrigerante de 0,00185 kg/s, flujo de CO2 con cuatro bafles, separación entre bafles de 20 cm, temperatura entrada de 20°C - 35°C, temperatura salida de 12°C - 14°C, densidad mínima de salida 850 kg/m3, presión en el casco de 55 bar, flujo másico de CO2 menor de 100 g/min y diámetro de casco 10". Carbon dioxide recirculation system according to claim 1 CHARACTERIZED in that the condenser (12) integrated liquid liquefying and storage device has the following parameters in its condenser (12): 124 tubes (13), cross-section of 17 mm, longitudinal passage of 14.7 mm, diameter of 1/2 "pipes, material tubes copper type m, length tubes of 1 m, four steps per tube, temperature between 9 ° C-1 1 ° C, pressure in the tubes between 1 bar - 2 bar and mass flow of cooling water of 0.00185 kg / s, CO2 flow with four speakers, separation between speakers of 20 cm, inlet temperature of 20 ° C - 35 ° C, outlet temperature of 12 ° C - 14 ° C, minimum output density 850 kg / m 3 , hull pressure of 55 bar, CO2 mass flow less than 100 g / min and hull diameter 10 ".
Sistema de recirculación de dióxido de carbono supercrítico de acuerdo con la reivindicación 1 CARACTERIZADO por que el condensador (12) tiene un casco con espesor entre 3,45 mm - 9,27 mm, tubos con espesor entre 0,0396 mm - 0,635 mm, placa porta tubos con espesor entre 16,1 mm - 54 mm, 16 pernos con diámetro entre 3/4" - 1 ", Torque de Apriete requerido de1670 Lbf-in, espesor requerido de la brida para el casco entre 53,6 mm - 54 mm.  Supercritical carbon dioxide recirculation system according to claim 1 CHARACTERIZED in that the condenser (12) has a hull with a thickness between 3.45 mm - 9.27 mm, tubes with a thickness between 0.0396 mm - 0.635 mm, tube holder plate with thickness between 16.1 mm - 54 mm, 16 bolts with diameter between 3/4 "- 1", Torque required of 1670 Lbf-in, required thickness of the helmet flange between 53.6 mm - 54 mm
Sistema de recirculación de dióxido de carbono de acuerdo con la reivindicación 1 CARACTERIZADO por que el subsistema de Refrigeración se compone de un reservorio de agua (15), una bomba (21 ) para desplazarla, un evaporador y una unidad condensadora (16) que emplea como líquido refrigerante R-22 (38) para enfriar el agua (14), donde este subsistema se encargada de hacer circular el agua refrigerante por los tubos (13) de cobre que conforman el condensador (12) y almacenador de C02.(22), cuya temperatura del refrigerante dentro de los tubos (13) de cobre deberá ser inferior a los 12°C de tal forma que la temperatura superficial de los mismos sea menor de 12,9°C para obtener CO2 subenfriado con una densidad mínima de 850 kg/m3 y la cantidad de calor que se requiere extraer al CO2 el cual se calcula que ingresa a una tasa de 100 g/min a una temperatura de 35°C y a unas condiciones de presión de 55 bar es de 360 Watts equivalentes a 1230 BTU/h ó 310 kcal/h a una temperatura del refrigerante de 1 1 °C ya que el proceso de condensación del CO2 a 55 bar se inicia a los 18,27°C. Carbon dioxide recirculation system according to claim 1 CHARACTERIZED in that the cooling subsystem is composed of a water reservoir (15), a pump (21) to move it, an evaporator and a condensing unit (16) that employs as coolant R-22 (38) to cool the water (14), where this subsystem is responsible for circulating the coolant water through the copper tubes (13) that make up the condenser (12) and C0 2 storage. ( 22), whose coolant temperature inside the copper pipes (13) must be below 12 ° C so that their surface temperature is less than 12.9 ° C to obtain subcooled CO2 with a minimum density of 850 kg / m 3 and the amount of heat that is required to extract to the CO2 which is calculated to enter at a rate of 100 g / min at a temperature of 35 ° C and at pressure conditions of 55 bar is 360 Watts equivalent to 1230 BTU / h or 310 kcal / h at a temperature d the refrigerant of 1 1 ° C since the process of condensation of CO2 at 55 bar starts at 18.27 ° C.
PCT/IB2017/055640 2016-09-20 2017-09-18 System for recirculating supercritical carbon dioxide, which uses an integrated device for liquefying and storing the fluid WO2018069778A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012194A (en) * 1971-10-04 1977-03-15 Maffei Raymond L Extraction and cleaning processes
US5267455A (en) * 1992-07-13 1993-12-07 The Clorox Company Liquid/supercritical carbon dioxide dry cleaning system
US5772783A (en) * 1994-11-09 1998-06-30 R.R. Street & Co. Inc. Method for rejuvenating pressurized fluid solvent used in cleaning a fabric article
EP1405662A2 (en) * 2002-10-02 2004-04-07 The Boc Group, Inc. CO2 recovery process for supercritical extraction
WO2012000520A2 (en) * 2010-07-02 2012-01-05 Union Engineering A/S High pressure recovery of carbon dioxide from a fermentation process
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