KR20170010977A - - -hydrate slurry refrigeration and freezing systems - Google Patents

- -hydrate slurry refrigeration and freezing systems Download PDF

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Publication number
KR20170010977A
KR20170010977A KR1020150102756A KR20150102756A KR20170010977A KR 20170010977 A KR20170010977 A KR 20170010977A KR 1020150102756 A KR1020150102756 A KR 1020150102756A KR 20150102756 A KR20150102756 A KR 20150102756A KR 20170010977 A KR20170010977 A KR 20170010977A
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South Korea
Prior art keywords
carbon dioxide
hydrate slurry
supplied
unit
expansion device
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KR1020150102756A
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Korean (ko)
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KR101722321B1 (en
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윤린
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한밭대학교 산학협력단
한밭대학교 산학협력단
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Priority to KR1020150102756A priority Critical patent/KR101722321B1/en
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    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • F25B41/04—
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The present invention relates to a carbon dioxide-hydrate slurry producing unit that receives water and carbon dioxide externally to produce a carbon dioxide hydrate slurry; A first load unit for receiving the carbon dioxide-hydrate slurry produced in the carbon dioxide-hydrate slurry producing unit and exchanging heat with an external object; A pump for supplying the carbon dioxide-hydrate slurry produced in the carbon dioxide-hydrate slurry producing unit to the first load unit; A separator for separating the carbon dioxide-hydrate slurry passing through the first load section into water and carbon dioxide, and supplying the separated water to the carbon dioxide-hydrate slurry producing section; A first compressor for compressing carbon dioxide separated and supplied from the separator; A cooling unit for cooling the carbon dioxide compressed while passing through the first compressor; A first expansion device for expanding carbon dioxide which has passed through the cooling part; And a receiver for storing carbon dioxide which has passed through the first expansion device and for supplying carbon dioxide to the carbon dioxide-hydrate slurry producing section. The present invention also provides a carbon dioxide-hydrate slurry refrigeration and refrigeration system.
Therefore, it is possible to improve refrigeration and refrigeration efficiency by continuously producing carbon dioxide-hydrate and using it as a secondary fluid.

Description

CO2-hydrate slurry refrigeration and freezing systems {CO2-hydrate slurry refrigeration and freezing systems}

The present invention relates to a carbon dioxide-hydrate slurry refrigeration and refrigeration system, and more particularly to a carbon dioxide-hydrate slurry refrigeration and refrigeration system that continuously generates carbon dioxide-hydrate and uses it as a secondary fluid to implement a refrigeration and refrigeration system. .

Korean Patent Laid-Open Publication No. 10-2011-0054279, gas hydrate is a special type of trapping compound whose appearance is white solid resembling ice, but the crystal structure and physical properties of the material are very different. In addition, generally, under the conditions of high pressure and low temperature, void space called a pupil is generated in a three-dimensional lattice structure formed by hydrogen bonding between water molecules, and a low molecular weight gas molecule (methane, ethane, propane, carbon dioxide, Etc.) are physically captured and generated.

These gas hydrates have potential characteristics that can be applied to various industrial fields, and many studies have been conducted recently. It can be divided into five broad categories: securing fluidity, recovering energy resources, coping with climate change, transporting and storing gas, and safety associated with each of these areas.

Korean Patent Laid-Open Publication No. 10-2011-0054279 discloses an apparatus for producing gas hydrate in which water supplied from a water tank 11 is atomized by using an ultrasonic atomization apparatus 20 and is supplied to a reactor 30 And an ultrasonic vibrator (22) for introducing the water supplied from the upper part of the atomization-producing tank to the inside of the atomization-producing tank and introducing the water into the inside of the atomization-producing tank. The gas hydrate producing apparatus (10) A feed gas feed pipe 23 communicating with the atomization feed tank side to feed a gas hydrate generation gas as a feed gas and a feed gas containing water atomized in communication with the atomization feed tank side, And a circulation pipe (25) communicating with the bottom surface of the atomization-producing tank and transferring the non-atomized water to the water tank again. The mixed gas transfer pipe (24) Ultrasonic atomizing apparatus 20 with; A cooling jacket 32 installed on an outer wall of the reaction tank for cooling the reaction tank to generate a gas hydrate of a mixed gas supplied from a mixed gas inlet pipe communicated with the upper portion of the reaction tank, A gas hydrate discharge pipe 33 formed on the bottom of the reaction tank for discharging the gas hydrate produced by the reaction and an unreacted mixed gas discharge pipe 34 formed in the reaction tank for discharging unreacted mixed gas 30).

The gas hydrate produced by such a hydrate producing apparatus will have a feature of being excellent in efficiency as a secondary fluid. However, the hydrate production apparatus has a problem in that it is difficult to implement a configuration in which gas hydrate is continuously generated and supplied to the cooling system, so that it is difficult to apply it as a secondary fluid of the cooling system.

DISCLOSURE Technical Problem The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a carbon dioxide-hydrate slurry refrigeration and refrigeration system capable of improving the efficiency of a refrigeration and refrigeration system by continuously producing carbon dioxide- The purpose is to provide.

In order to accomplish the above object, the present invention provides a carbon dioxide-hydrate slurry producing unit that receives water and carbon dioxide externally to produce a carbon dioxide hydrate slurry; A first load unit for receiving the carbon dioxide-hydrate slurry produced in the carbon dioxide-hydrate slurry producing unit and exchanging heat with an external object; A pump for supplying the carbon dioxide-hydrate slurry produced in the carbon dioxide-hydrate slurry producing unit to the first load unit; A separator for separating the carbon dioxide-hydrate slurry passing through the first load section into water and carbon dioxide, and supplying the separated water to the carbon dioxide-hydrate slurry producing section; A first compressor for compressing carbon dioxide separated and supplied from the separator; A cooling unit for cooling the carbon dioxide compressed while passing through the first compressor; A first expansion device for expanding carbon dioxide which has passed through the cooling part; And a receiver for storing carbon dioxide which has passed through the first expansion device and for supplying carbon dioxide to the carbon dioxide-hydrate slurry producing section. The present invention also provides a carbon dioxide-hydrate slurry refrigeration and refrigeration system.

The carbon dioxide-hydrate slurry refrigeration and refrigeration system according to the present invention comprises a second expansion device for supplying carbon dioxide stored in the receiver and expanding carbon dioxide supplied; A second load unit for supplying expanded carbon dioxide while passing through the second expansion device, and evaporating the supplied carbon dioxide; And a second compressor for compressing the carbon dioxide evaporated while passing through the second load unit and supplying compressed carbon dioxide to the first compressor.

In the carbon dioxide-hydrate slurry refrigeration and freezing system according to the present invention, a first flow rate regulating valve for regulating the flow rate of carbon dioxide supplied to the supply pipe for supplying carbon dioxide to the carbon dioxide-hydrate slurry producing unit in the receiver may be provided And a second flow control valve for controlling the flow rate of carbon dioxide supplied from the receiver to the second expansion device may be installed in the connection pipe connecting the receiver and the second expansion device.

The carbon dioxide-hydrate slurry refrigeration and refrigeration system according to the present invention can improve refrigeration and refrigeration efficiency by continuously producing carbon dioxide-hydrate and using it as a secondary fluid.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a conventional apparatus for producing a gas hydrate; FIG.
2 is a configuration diagram of a carbon dioxide-hydrate slurry refrigeration and refrigeration system according to an embodiment of the present invention.
FIG. 3 is a view illustrating a cooling process of the carbon dioxide-hydrate slurry refrigeration and refrigeration system shown in FIG. 2. FIG.
FIG. 4 is a view illustrating the refrigeration process of the carbon dioxide-hydrate slurry refrigeration and refrigeration system shown in FIG. 2. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

FIG. 2 is a configuration diagram of a carbon dioxide-hydrate slurry refrigeration and refrigeration system according to an embodiment of the present invention, FIG. 3 is a view illustrating a refrigeration process of the carbon dioxide-hydrate slurry refrigeration and refrigeration system shown in FIG. 2 is a view showing the cooling process of the carbon dioxide-hydrate slurry refrigeration and refrigeration system shown in FIG.

2 to 4, a carbon dioxide-hydrate slurry refrigeration and refrigeration system 1000 according to an embodiment of the present invention includes a carbon dioxide-hydrate slurry generator 1100, a first load unit 12000, a pump 1300, A separator 1400, a first compressor 1500, a cooling unit 1600, a first expansion device 1700, a receiver 1800, a second expansion device 1900, a second load unit 2000, And a second compressor 2100.

The carbon dioxide-hydrate slurry producing unit 1100 preferably has a tank shape in which a space capable of accommodating liquid and gas is formed therein. The carbon dioxide-hydrate slurry producing unit 1100 includes a water- Carbon dioxide from the outside to produce carbon dioxide-hydrate.

Water, which is the liquid supplied to the carbon dioxide-hydrate slurry producing unit 1100, is supplied from the separating unit 1400, which will be described later, and carbon dioxide, which is a gas, is supplied to a separate supply pipe (not shown) And is supplied through a pipe (not shown).

The carbon dioxide-hydrate slurry generated in the carbon dioxide-hydrate slurry producing unit 1100 is supplied to the first load unit 1200. The first load unit 1200 receives the carbon dioxide-hydrate and performs heat exchange with the external object . The first load unit 1200 may be a heat exchanger commonly used in a refrigeration system. In the separation unit 1200, the carbon dioxide-hydrate is dissociated into water and carbon dioxide, and the surrounding heat is taken away to cool the external object.

The carbon dioxide-hydrate slurry produced in the carbon dioxide-hydrate slurry producing unit 1100 is preferably supplied to the first load unit 1200 from the carbon dioxide-hydrate slurry producing unit 1100 by a pump 1300, As the pump 1300, a general fluid pump for transferring a fluid is used, and a detailed description thereof will be omitted.

The carbon dioxide-hydrate dissociated in the first load portion 1200 is supplied to the separator 1400 and separated into water and carbon dioxide in the separator 1400. The separated water from the separating unit 1400 is supplied to the carbon dioxide-hydrate slurry producing unit 1100 and the carbon dioxide separated from the separating unit 1400 is supplied to the first compressor 1500.

The first compressor 1500 is disassembled in the first load portion 1200 and separates from the water in the separating portion 1400 and then serves to compress the carbon dioxide supplied from the first compressor 1500 and the carbon dioxide To the cooling unit 1600.

The carbon dioxide compressed by the first compressor 1500 is supplied to the cooling unit 1600. The cooling unit 1600 serves to cool the carbon dioxide compressed and transported by the first compressor 1500, As the unit 1600, a gas cooler is used.

The carbon dioxide cooled in the cooling section 1600 is supplied to the first expansion device 1700. The first expansion device 1700 serves to expand the supplied carbon dioxide and the carbon dioxide is supplied to the first expansion valve 1700 ), Thereby changing from high pressure to low pressure carbon dioxide.

The carbon dioxide changed from the high pressure to the low pressure while passing through the first expansion valve 1700 is supplied to and stored in the receiver 1800. The receiver 1800 receives the carbon dioxide changed to the low pressure through the supply pipe To the carbon dioxide-hydrate slurry producing unit 1100.

A first flow control valve 1820 is installed in a supply pipe (not shown) for supplying the carbon dioxide stored in the receiver 1800 to the carbon dioxide-hydrate slurry generator 1100, and the first flow control valve 1820 Adjusts the amount of carbon dioxide supplied from the receiver (1800) to the carbon dioxide-hydrate slurry generator (1100).

The carbon dioxide stored in the receiver 1800 is not only supplied to the carbon dioxide-hydrate slurry generator 1100 but may be supplied to the second expansion device 1900. The carbon dioxide supplied from the receiver 1800 to the second expansion device 1900 is supplied through a connection pipe (not shown) connecting the receiver 1800 and the second expansion device 1900, A second flow control valve 1840 is provided in the connection pipe (not shown) for controlling the amount of carbon dioxide to be supplied.

Since the first flow control valve 1820 and the second flow control valve 1840 are installed in the supply pipe (not shown) and the connection pipe (not shown), the carbon dioxide stored in the receiver 1800 is converted into the carbon dioxide- And may be selectively supplied to the hydrate slurry producing section 1100 or the second expansion device 1900. That is, when the carbon dioxide is supplied to the carbon dioxide-hydrate slurry generator 1100, the first flow control valve 1820 is opened and the second flow control valve 1840 is shut off, The first flow control valve 1820 may be shut off and the second flow control valve 1840 may be opened.

The second expansion device 1900 serves to expand the carbon dioxide supplied from the receiver 1800 and the carbon dioxide which has passed through the second expansion device 1900 is supplied to the second load part 2000. The second load unit 2000 evaporates the carbon dioxide supplied from the second expansion device 1900, and the evaporated carbon dioxide gas is supplied to the second compressor 2100. The second load unit 2000 cools an external object using the carbon dioxide supplied from the second expansion device 1900, and supplies the evaporated carbon dioxide gas used for cooling to the second compressor. The second load unit 2000 preferably has a freezing function to cool and cool an external object at a lower temperature than the first load unit 1200.

The second compressor 2100 compresses the evaporated carbon dioxide gas while passing through the second load unit 2000. The carbon dioxide compressed by the second compressor 2100 is supplied to the first compressor 1500, The carbon dioxide supplied from the separation unit 1400 is compressed.

A method of operating the carbon dioxide-hydrate slurry refrigeration and refrigeration system 1000 according to an embodiment of the present invention will now be described.

3, carbon dioxide and water are supplied to the carbon dioxide-hydrate slurry producing unit 1100. The carbon dioxide-

When the carbon dioxide-hydrate slurry is produced in the carbon dioxide-hydrate slurry producing unit 1100, the pump 1300 supplies the generated carbon dioxide-hydrate slurry to the first load unit 1200.

The carbon dioxide-hydrate slurry supplied to the first load unit 1200 is heat-exchanged with an external object, and the external object is cooled and dissociated into water and carbon dioxide.

Water and carbon dioxide separated from the first load section 1200 are supplied to the separation section 1400 and water separated from the first load section 1200 in the separation section 1400 is supplied to the carbon dioxide- And the separated carbon dioxide is supplied to the first compressor 1500.

The first compressor 1500 compresses the supplied carbon dioxide and the compressed carbon dioxide is supplied to the cooling unit 1600. The cooling unit 1600 cools the supplied carbon dioxide and thereafter is supplied to the first expansion device 1700 Supply. The expanded carbon dioxide passing through the first expansion device 1700 is supplied to the receiver 1800 and then supplied to the carbon dioxide-hydrate slurry generator 1100. In the carbon dioxide-hydrate slurry generator 1100, the carbon dioxide- Slurry, and recycled. The carbon dioxide separated from the separator 1400 is supplied to the carbon dioxide-hydrate slurry generator 1100 through the first compressor 1500, the cooling unit 1600, the first expansion device 1700, and the receiver 1800. [ And then supplied to the separator 1400 after being generated as the carbon dioxide-hydrate slurry. The carbon dioxide-hydrate slurry refrigeration system is operated by circulating in the above-described process.

4, carbon dioxide and water are supplied to the carbon dioxide-hydrate slurry producing unit 1100. The carbon dioxide-

When the carbon dioxide-hydrate slurry is produced in the carbon dioxide-hydrate slurry producing unit 1100, the pump 1300 supplies the generated carbon dioxide-hydrate slurry to the first load unit 1200.

The carbon dioxide-hydrate slurry supplied to the first load unit 1200 is heat-exchanged with an external object, and the external object is cooled and dissociated into water and carbon dioxide.

The water and carbon dioxide separated from the first load section 1200 are supplied to the separation section 1400. The water separated from the first load section 1200 is supplied to the separation section 1400 through the carbon dioxide- And the separated carbon dioxide is supplied to the first compressor 1500.

The first compressor 1500 compresses the supplied carbon dioxide, and the compressed carbon dioxide is supplied to the cooling unit 1600. The cooling unit 1600 cools the supplied carbon dioxide. And is supplied to the expanded carbon dioxide receiver 1800 while passing through the first expansion device 1700. The carbon dioxide supplied to the receiver 1800 is expanded while passing through the second expansion device 1900 and then supplied to the second load portion 2000. The second load portion 2000 is supplied to the second expansion device 1900, and the evaporated carbon dioxide gas is supplied to the second compressor 2100, compressed, and then supplied to the first compressor 1500.

The carbon dioxide compressed in the first compressor 1500 is cooled by the cooling unit 1600, the first expansion device 1700, the receiver 1800, the second expansion device 1900, the second load unit 2000, The carbon dioxide-hydrate slurry refrigeration system is operated by being circulated to the first compressor 1500 again through the compressor 2100.

Therefore, it is possible to improve refrigeration and refrigeration efficiency by continuously producing carbon dioxide-hydrate and using it as a secondary fluid.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1000: Carbon Dioxide - Hydrate slurry refrigeration and freezing system
1100: Carbon dioxide-hydrate slurry producing unit
1200: first load section 1300: pump
1400: separator 1500: first compressor
1600: cooling section 1700: first expansion device
1800: Receiver 1900: Second expansion device
2000: second load section 2100: second compressor

Claims (3)

A carbon dioxide-hydrate slurry producing unit which receives water and carbon dioxide externally to produce a carbon dioxide hydrate slurry;
A first load unit for receiving the carbon dioxide-hydrate slurry produced in the carbon dioxide-hydrate slurry producing unit and exchanging heat with an external object;
A pump for supplying the carbon dioxide-hydrate slurry produced in the carbon dioxide-hydrate slurry producing unit to the first load unit;
A separator for separating the carbon dioxide-hydrate slurry passing through the first load section into water and carbon dioxide, and supplying the separated water to the carbon dioxide-hydrate slurry producing section;
A first compressor for compressing carbon dioxide separated and supplied from the separator;
A cooling unit for cooling the carbon dioxide compressed while passing through the first compressor;
A first expansion device for expanding carbon dioxide which has passed through the cooling part; And
And a receiver for storing carbon dioxide passed through the first expansion device and supplying carbon dioxide to the carbon dioxide-hydrate slurry producing section.
The method according to claim 1,
A second expansion device that is supplied with the carbon dioxide stored in the receiver and expands the supplied carbon dioxide;
A second load unit for supplying expanded carbon dioxide while passing through the second expansion device, and evaporating the supplied carbon dioxide; And
Further comprising a second compressor for compressing vaporized carbon dioxide while passing through said second load and for supplying compressed carbon dioxide to a first compressor.
The method according to claim 1 or 2,
A supply pipe for supplying carbon dioxide to the carbon dioxide-hydrate slurry producing unit in the receiver is provided with a first flow rate control valve for controlling the flow rate of carbon dioxide supplied,
Wherein the connection pipe connecting the receiver and the second expansion device is provided with a second flow control valve for controlling a flow rate of carbon dioxide supplied from the receiver to the second expansion device. Refrigeration system.
KR1020150102756A 2015-07-21 2015-07-21 - -hydrate slurry refrigeration and freezing systems KR101722321B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106802023A (en) * 2017-03-16 2017-06-06 中南大学 A kind of carbon dioxide hydrate refrigeration system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003071199A1 (en) * 2002-02-19 2003-08-28 Mitsui Zosen Plant Engineering Inc. Refrigerating method and refrigerating system utilizing gas hydrate
JP2004101140A (en) * 2002-09-12 2004-04-02 Tokyo Electric Power Co Inc:The Heat pump using gas hydrate and heat using device
KR20050084779A (en) * 2002-12-13 2005-08-29 도쿄 덴료쿠 가부시기가이샤 Heat pump using gas hydrate, and heat utilizing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003071199A1 (en) * 2002-02-19 2003-08-28 Mitsui Zosen Plant Engineering Inc. Refrigerating method and refrigerating system utilizing gas hydrate
JP2004101140A (en) * 2002-09-12 2004-04-02 Tokyo Electric Power Co Inc:The Heat pump using gas hydrate and heat using device
KR20050084779A (en) * 2002-12-13 2005-08-29 도쿄 덴료쿠 가부시기가이샤 Heat pump using gas hydrate, and heat utilizing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106802023A (en) * 2017-03-16 2017-06-06 中南大学 A kind of carbon dioxide hydrate refrigeration system
CN106802023B (en) * 2017-03-16 2019-05-10 中南大学 A kind of carbon dioxide hydrate refrigeration system

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