WO2015107249A1 - Dispositif de distillation à effets multiples med à efficatité he-med élevée - Google Patents

Dispositif de distillation à effets multiples med à efficatité he-med élevée Download PDF

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Publication number
WO2015107249A1
WO2015107249A1 PCT/ES2015/070031 ES2015070031W WO2015107249A1 WO 2015107249 A1 WO2015107249 A1 WO 2015107249A1 ES 2015070031 W ES2015070031 W ES 2015070031W WO 2015107249 A1 WO2015107249 A1 WO 2015107249A1
Authority
WO
WIPO (PCT)
Prior art keywords
med
regasification
heat
sea
lng
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/ES2015/070031
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English (en)
Spanish (es)
Inventor
Dan Alexandru Hanganu
Juan Eusebio Nomen Calvet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALEX HANGANU RESEARCH SL
Original Assignee
ALEX HANGANU RESEARCH SL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from ES201430054A external-priority patent/ES2473190B1/es
Application filed by ALEX HANGANU RESEARCH SL filed Critical ALEX HANGANU RESEARCH SL
Publication of WO2015107249A1 publication Critical patent/WO2015107249A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/26—Multiple-effect evaporating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B01D5/006—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes

Definitions

  • High-efficiency HE-MED MED multi-effect distillation devices are known in the state of the art in which, from a heat source, sensible heat is transformed into a steam flow that carries latent heat to a heat sink to through at least one wall of high thermal conductivity formed by at least one heat pipe, desalinating water in each of the effects by repeated cycles of evaporation and condensation at low pressure and temperature and transforming the energy flow into a series of entropy gains.
  • an energy flow is used between a heat source and a heat sink to achieve a sequence of processes for separating the H20 water from the rest of the water with impurities from a water flow. But the energy flow ends in the heat sink. With a HE-MED the clean separation and use of part of the energy flow for other uses is not achieved.
  • sea or river water can accumulate thermal energy in the form of water at temperatures between 20 e C and 30 e C for example.
  • This caloric energy is used in regasification processes of liquefied natural gas to provide the heat necessary for the phase change from liquid to gas and the temperature increase necessary for gas distribution.
  • the impurities contained in the water are provided, including aquatic life and salts that cause all kinds of incrustation and corrosion problems.
  • the clean separation of energy, H20 water and impurities allow the contribution of energy without impurities, with the consequent advantages.
  • the LNG liquefied natural gas regasification process requires an important contribution of caloric energy to allow the phase change from liquid to gas and to move from a temperature below -163 e C to temperature ranges above 6 e C.
  • the current methods of contribution of this energy are based on three sources of heat: energy resulting from combustion, supply of warm air in warm areas and supply of sea or river water in warm or temperate areas.
  • Combustion-based methods are usually supplied with natural GN gas itself and require an energy consumption that ranges between 1.5% and 2% of the amount of LNG processed. An energy and economic cost that entails the consequent negative environmental effects.
  • the central problem of the energy supply system accumulated naturally in sea or river water is that the energy is not separated from the impurities contained in the water and when energy is supplied on the regasification ducts the water impurities are also contributed such as dissolved salts and microscopic aquatic life that cannot be captured by generally used industrial filters.
  • the present invention seeks to solve one or more of the above-mentioned drawbacks by means of a high efficiency MED multi-effect distillation device with thermal bridge as defined in the claims.
  • An object is a HE-MED high efficiency MED multi-effect distillation device with a condenser that has a thermal bridge with a liquefied natural gas regasifier, so that a clean separation of thermal energy and the H20 from a flow rate of river or sea water with energy and impurities.
  • the HE-MED thermal bridge device separates sea or river water into three flows:
  • Another object is a variant of the HE-MED device with the thermal bridge between the condenser and the regasification duct that is characterized by a wall of high thermal conductivity with at least one heat pipe that at one of its ends acts as a condenser of the water vapor of the HE-MED and at its other end it is integrated or in contact with a LNG liquefied natural gas regasification duct through which LNG circulates that captures the heat supplied cleanly by the heat pipes for the change of LNG status of liquid to natural gas.
  • Another object is a variant of the HE-MED device with the thermal bridge between the condenser and the regasification duct that is characterized in that the regasification duct is located inside the HE-MED and acts as a condenser of the HE-MED, producing a direct thermal bridge.
  • Another object is a variant of the HE-MED device with the thermal bridge between the condenser and the regasification duct which is characterized by a condenser of the HE-MED device adapted to supply thermal energy by means of a heat exchanger to a loop circuit by the flow of a working fluid to thermally connect the condenser of the HE-MED device with the regasification ducts of an Open Rack Vaporizer ORV on which the clean working liquid is poured, without impurities or aquatic life.
  • the HE-MED device with thermal bridge allows to control the temperature reduction of sea or river water used as a heat source so that it complies with the environmental regulations in force in each territory.
  • Figure 1 shows a diagram of a multi-effect distillation device MED of high efficiency HE-MED with thermal bridge for the regasification of LNG, this thermal bridge being between a wall of high thermal conductivity that acts as a condenser of the HE-MED and at least one regasification duct in which the cold end of at least one heat pipe is integrated or assembled.
  • Figure 2 shows a diagram of a HE-MED high-efficiency MED multi-effect distillation device with thermal bridge for LNG regasification with a direct thermal bridge since the regasification tube constitutes the HE-MED effect condenser.
  • Figure 3 shows a diagram of a multi-effect distillation device MED of high efficiency HE-MED with thermal bridge for the regasification of LNG with a thermal bridge by means of a loop circuit with a working liquid between the evaporator and the regasification tubes .
  • Figure 1 shows a multi-effect distillation device MED of high efficiency HE-MED with thermal bridge for the regasification of LNG that captures the thermal energy accumulated naturally in sea or river water , through a wall of high thermal conductivity (1) formed by at least one heat pipe, in thermal contact with sea or river water at a temperature t1 (2).
  • sea or river water is supplied, (3) deaerated and at a temperature between t1 and t2 which, since the enclosure is subjected to vacuum, sea or river water (3) captures the energy flowing between the high thermal conductivity wall (1) and the heat sink (6), transforming into latent heat for the phase change of part of the water, evaporating (4), emitting water vapor (5) and producing an internal pressure of the enclosure equal to the vapor pressure in dynamic equilibrium of the working fluid.
  • the steam will travel at high speed towards the cold point constituted by the inner face of a wall of high thermal conductivity (9) formed by at least one heat pipe, integrated or assembled with at least one regasification duct ( 6).
  • the Water vapor will condense (7) releasing latent heat by changing the phase from vapor to liquid, that is, giving rise to an emission of energy.
  • This released energy is transferred through the wall of high thermal conductivity (9) and is captured by the regasification duct (6) reaching the LNG that circulates inside, which absorbs it for its phase change from liquid to natural gas .
  • the condensed H20 (8) is extracted from the enclosure by means of a valve that allows the control of the internal pressure of the enclosure.
  • the excess of liquid from sea or river water discharged (3) on the inner face of the thermal transfer surface is also extracted by means of a valve that allows the control of the internal pressure of the enclosure, so that the water is extracted more impurities that have been separated from the H20 and part of its energy.
  • Sea or river water in thermal contact (2) with the wall of high thermal conductivity (1) must have a temperature t1 higher than 10 e C. After transferring part of its energy through the wall of high thermal conductivity (1) This sea or river water will have a temperature decrease of X and C equal to or lower than the one established by local environmental regulations. A temperature jump that is usually limited to about 6 e C.
  • This temperature difference is controlled by balancing the power extracted in the form of water vapor (5), based on the flow of water provided for energy collection (2) over the outer side of the wall with high thermal conductivity (1), the flow of sea or river water (3) provided on the inner side of this wall with high thermal conductivity and the flow of liquefied natural gas introduced through the regasification ducts (6).
  • the greater the temperature jump, x the greater the power transmitted as water vapor flow (5).
  • the water that is introduced into the effect (3) can have a temperature within a range between t1 and t2.
  • the system will be more efficient the closer it is to t2, so that evaporation (4) will occur more quickly. Thanks to the separation of energy from sea or river water and its impurities, it is possible to provide energy from sea or river water to a LNG liquefied natural gas regasifier without the problem of aquatic life inlays, which occur when The energy of sea or river water is supplied together with this water on these regasification ducts as a source of heat. The rest of the problems already described of the energy contribution of sea or river water together with this water, such as corrosion by sea salts, scale, ice formation or problems of mortality of aquatic life by freezing are avoided.
  • FIG 2 a variant of the HE-MED device described in Figure 1 is illustrated with the variant that at least one regasification duct (6) is inserted into the enclosure of the HE-MED
  • the regasification duct (6) acts as a heat sink on which the steam of the working fluid (5) condenses (7).
  • FIG 3 illustrates another variant of a HE-MED high efficiency MED multi-effect distillation device with thermal bridge for LNG regasification in which a loop circuit is incorporated, for those cases in which for any reason, the regasification ducts must be found outside the HE-MED, as for example in the case of adaptation to an existing Open Rack Vaporizers ORV installation.
  • a heat exchanger is introduced into the HE-MED, such as at least one tube (13) within which a working liquid circulates such as distilled water at temperatures within a range of t3 below that of the heat source t1. Water vapor inside the HE-MED condenses on the tubes (13) through which the working fluid circulates.
  • These tubes (13) act as a condenser of the HE-MED, so that the working liquid that circulates inside these tubes absorbs the latent heat released in the condensation of the water vapor (7) by the change of vapor phase to liquid, increasing the temperature of the working liquid inside the loop circuit tube (13).
  • the heated working liquid is circulated (10) to the ORVs and poured onto its external walls (1 1), in the same way that currently sea or river water is poured with thermal energy and impurities, with the An important advantage that the working liquid now discharged does not entail the environmental and operational problems caused by the discharge of water with aquatic life and corrosive salts.
  • the liquefied natural gas that circulates within the regasification tubes of the ORV (1 1) absorbs the heat provided by the working fluid that flows through the outer surface of the ORV and this sensitive heat is transformed into latent heat for the phase change of the LNG to natural gas GN.
  • This heat exchange causes the working fluid to cool.
  • This cooled working fluid is collected and circulated (12) back into the evaporator (13) of the HE-MED, so that it is reheated.
  • the system is calibrated so that the thermal jump of the working fluid inside the evaporator of the HE-MED (13) is equal, but of opposite sign, to the thermal jump that the working liquid experiences when flowing on the external walls of the panels of the ORV regasifiers (1 1).
  • sea or river water which acts as the heat source of the device must be at a temperature t1 higher than 20 e C to get the working fluid of the loop circuit to be poured above the ORV is above 1 1 e C which is usually the minimum temperature required for the correct operation of the current ORV.
  • this variant requires a greater total temperature jump along the device that includes a closed circuit.
  • This is a variant of commitment to adapt the existing LMOs. For any of the three figures described, in territories that have an abundance of drinking water and do not need the generation of distilled water, an operating operation can be chosen in which only the energy contained in sea or river water is separated no need to separate the H20.
  • the liquid that is introduced (3) into the effect can be a working liquid without impurities, such as distilled water that is recovered after condensation (8).
  • the liquid extracted after condensation (8), as well as the excess liquid removed from the evaporator, can be redirected in a closed circuit and can be supplied back into the HE-MED (3).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne un dispositif de distillation à effets multiples MED à efficacité HE-MED élevée qui utilise comme fluide de travail de l'eau de mer ou de rivière à température ambiante; qui comprend un condensateur dans lequel se libère la chaleur de condensation et, en outre, un pont thermique avec au moins un conduit de regazéification de gaz naturel liquéfié conçu pour utiliser la chaleur libérée pour regazéifier le gaz naturel liquéfié.
PCT/ES2015/070031 2014-01-20 2015-01-20 Dispositif de distillation à effets multiples med à efficatité he-med élevée Ceased WO2015107249A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ESP201430054 2014-01-20
ES201430054A ES2473190B1 (es) 2014-01-20 2014-01-20 Dispositivo de Destilación Multi-Efecto
ESP201430329 2014-03-11
ES201430329A ES2548106B1 (es) 2014-01-20 2014-03-11 Un dispositivo de destilación multi-efecto MED de alta eficiencia HE-MED

Publications (1)

Publication Number Publication Date
WO2015107249A1 true WO2015107249A1 (fr) 2015-07-23

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PCT/ES2015/070031 Ceased WO2015107249A1 (fr) 2014-01-20 2015-01-20 Dispositif de distillation à effets multiples med à efficatité he-med élevée

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WO (1) WO2015107249A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107413061A (zh) * 2017-09-21 2017-12-01 黄传芳 循环节能双效浓缩器
US10702804B2 (en) 2016-04-14 2020-07-07 I.D.E. Technologies Ltd Integrated unit for intake and pretreatment with local backwashing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724229A (en) * 1971-02-25 1973-04-03 Pacific Lighting Service Co Combination liquefied natural gas expansion and desalination apparatus and method
US5925223A (en) * 1993-11-05 1999-07-20 Simpson; Gary D. Process for improving thermal efficiency while producing power and desalinating water
ES2302224T3 (es) * 2004-08-27 2008-07-01 O.H.D.L. Optimised Hybrid Desalination Limited Proceso de desalinizacion por destilacion msf y aparato.
CN201367361Y (zh) * 2009-03-13 2009-12-23 国家海洋局天津海水淡化与综合利用研究所 一种箱柜式低温多效蒸馏海水淡化整体装置
WO2012032355A1 (fr) * 2010-09-09 2012-03-15 Pdx Technologies Ag Dessalement thermique par évaporation éclair du jet de brisement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724229A (en) * 1971-02-25 1973-04-03 Pacific Lighting Service Co Combination liquefied natural gas expansion and desalination apparatus and method
US5925223A (en) * 1993-11-05 1999-07-20 Simpson; Gary D. Process for improving thermal efficiency while producing power and desalinating water
ES2302224T3 (es) * 2004-08-27 2008-07-01 O.H.D.L. Optimised Hybrid Desalination Limited Proceso de desalinizacion por destilacion msf y aparato.
CN201367361Y (zh) * 2009-03-13 2009-12-23 国家海洋局天津海水淡化与综合利用研究所 一种箱柜式低温多效蒸馏海水淡化整体装置
WO2012032355A1 (fr) * 2010-09-09 2012-03-15 Pdx Technologies Ag Dessalement thermique par évaporation éclair du jet de brisement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 201006, Derwent World Patents Index; Class D15, AN 2010-A18366 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10702804B2 (en) 2016-04-14 2020-07-07 I.D.E. Technologies Ltd Integrated unit for intake and pretreatment with local backwashing
CN107413061A (zh) * 2017-09-21 2017-12-01 黄传芳 循环节能双效浓缩器

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