WO2022188188A1 - Vaporisateur de fluide intermédiaire intégré présentant une fonction d'utilisation d'énergie froide et système de génération de puissance composé de celui-ci - Google Patents

Vaporisateur de fluide intermédiaire intégré présentant une fonction d'utilisation d'énergie froide et système de génération de puissance composé de celui-ci Download PDF

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WO2022188188A1
WO2022188188A1 PCT/CN2021/080656 CN2021080656W WO2022188188A1 WO 2022188188 A1 WO2022188188 A1 WO 2022188188A1 CN 2021080656 W CN2021080656 W CN 2021080656W WO 2022188188 A1 WO2022188188 A1 WO 2022188188A1
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Prior art keywords
medium
outlet
inlet
low
circulating
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PCT/CN2021/080656
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English (en)
Chinese (zh)
Inventor
姚寿广
张子敬
李辰
王梦迪
沈晓宇
毛惠艺
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江苏科技大学
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Priority to KR1020227004500A priority Critical patent/KR102659498B1/ko
Publication of WO2022188188A1 publication Critical patent/WO2022188188A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F17C9/04—Recovery of thermal energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/07—Generating electrical power as side effect

Definitions

  • the invention relates to a vaporizer and a power generation system, in particular to an integrated intermediate medium vaporizer with cold energy utilization and a power generation system composed thereof.
  • Natural gas is usually stored and transported in the form of LNG. Before being transported to the user terminal, the LNG with a temperature of about -163 °C is increased to natural gas (NG) with a temperature of 10 °C to 25 °C, and the vaporization process is generally carried out in the LNG vaporizer. Since LNG contains 830-860 MJ/t of cooling capacity, the use of high-grade cold energy to build a cycle power generation system is the main way to utilize LNG cooling capacity on a large scale.
  • NG natural gas
  • the intermediate circulating medium vaporizer is characterized by its compact structure , It has the advantages of strong adaptability to seawater with different water quality and operating conditions, good economy, and can avoid the freezing point problem of heating fluid, so it has become the first choice for LNG vaporization.
  • the integrated intermediate circulation medium vaporizer (IFV) can only be divided into traditional preheaters, evaporators, condensers and thermostats to form a split LNG cold energy power generation system. It increases the power consumption of the system, and brings about the problem of large footprint and space required.
  • LNG vaporization sites such as ships and offshore FSRU platforms that have strict constraints on floor space and space
  • the traditional LNG cold energy power generation system formed by split intermediate circulation medium vaporizers is difficult to even Not available.
  • the Chinese patent publication number CN110080846A proposes an integrated intermediate circulation medium vaporizer and power generation system with LNG cold energy utilization function using heat pipe technology.
  • the equipment investment has been realized, and the goal of high efficiency, energy saving and emission reduction of the system has been achieved.
  • this technical solution is only suitable for the case where the vaporization amount is relatively small, and the cold energy drawn from the intermediate circulation medium only constructs a single-stage Rankine cycle power generation system. It has the following two problems: 1.
  • the condensation and evaporation of the intermediate circulating medium are placed in the middle second channel in the evaporator shell, which limits the divisibility of the condensation area and the evaporation area of the intermediate circulating medium, that is, the condenser is limited. and the number of evaporators. 2.
  • the left side of the vaporizer shell runs through three channels for heat exchange through heat pipes, which not only brings about the number of heat sources for exchanging heat with LNG and the intermediate circulating medium, which cannot be adjusted, but can only be one type (such as seawater), but also makes the intermediate circulating medium
  • the evaporation zone is also indivisible.
  • the multi-stage cascaded Rankine cycle generally has multiple heat sources with different temperatures, and at this time, multiple evaporators corresponding to different circulating media are required. Obviously, the technical solutions of the above-mentioned patents cannot meet this requirement.
  • the task of the present invention is to provide an integrated intermediate medium vaporizer with cold energy utilization that can adapt to the requirements of different vaporization amounts to construct an efficient utilization system of LNG cold energy.
  • Another task of the present invention is to construct a power generation system using LNG cold energy according to the provision of an integrated intermediate medium vaporizer with cold energy that can adapt to different vaporization requirements.
  • an integrated intermediate medium vaporizer with cold energy utilization comprising a shell, wherein the shell is separated by a first partition plate and a second partition plate to form LNG vaporization heat exchange channels arranged in sequence and an intermediate circulation A medium heat exchange channel and a heat source medium heat exchange channel
  • the first partition plate is provided with a plurality of through holes
  • a plurality of heat pipe assemblies extend through the through holes from the LNG vaporization heat exchange channel to the intermediate circulation medium heat exchange channel
  • the casing is provided with an LNG inlet and an NG outlet located in the LNG vaporization heat exchange channel
  • a low-pressure gaseous intermediate circulation medium inlet and a low-pressure liquid intermediate circulation medium outlet are located on the casing located in the intermediate circulation medium heat exchange channel
  • the seawater heat exchange channel is divided into an intermediate circulation medium evaporation area and a NG temperature adjustment area by a middle partition.
  • the intermediate circulation medium evaporation area exchanges heat between the intermediate circulation medium and the heat source medium
  • the NG temperature adjustment area consists of NG and NG.
  • Heat source medium heat exchange the shell is located in the intermediate circulation medium evaporation area with a high-pressure gaseous intermediate circulation medium outlet and a high-pressure liquid intermediate circulation medium inlet, and the shell is located in the NG temperature adjustment area with a temperature regulator NG inlet and an inlet.
  • a thermostat NG outlet, the thermostat NG inlet is connected to the NG outlet.
  • first partition plate and the second partition plate are arranged in parallel in a horizontal direction.
  • the through holes of the first separator are staggered in rows and columns.
  • the heat pipe assembly is divided into several heat pipe groups.
  • the heat pipe groups are arranged from the LNG inlet to the NG outlet.
  • the boiling point of the working medium inside the heat pipes of the heat pipe group at the NG outlet increases sequentially.
  • heat pipe groups including a first heat pipe group, a second heat pipe group and a third heat pipe group
  • the first heat pipe group is close to the LNG inlet
  • the heat pipe working medium of the first heat pipe group is Methane
  • the third heat pipe group is close to the NG outlet
  • the heat pipe working medium of the third heat pipe group is propane
  • the second heat pipe group is located between the first heat pipe group and the third heat pipe group
  • the heat pipe working medium of the second heat pipe group is ethane.
  • the intermediate circulation medium evaporation area is provided with a first heat source medium tube bundle
  • the NG temperature adjustment area is provided with a second heat source medium tube bundle
  • the first heat source medium tube bundle and the second heat source medium tube bundle are arranged horizontally.
  • the intermediate circulating medium heat exchange channel is sequentially divided into a plurality of intermediate circulating medium condensation areas, and the separated intermediate circulating medium condensation areas are arranged in sequence from the LNG inlet side to the NG outlet side, close to the LNG inlet side.
  • the temperature of the intermediate circulating medium in the intermediate circulating medium condensing zone on the side of the LNG inlet gradually increases toward the temperature of the intermediate circulating medium in the intermediate circulating medium condensing zone on the side close to the NG outlet.
  • the circulating medium condensation zone is respectively provided with the low-pressure gaseous intermediate circulating medium inlet and the low-pressure liquid intermediate circulating medium outlet according to the countercurrent heat exchange with LNG.
  • the intermediate circulation medium evaporation area is divided into a plurality of intermediate circulation medium evaporation sub-areas, and the separated intermediate circulation medium evaporation sub-areas are respectively provided with a high-pressure liquid intermediate circulation medium inlet and a high-pressure gaseous intermediate circulation medium outlet.
  • the heat source medium is provided with inlet and outlet respectively according to the countercurrent heat exchange method with the circulating medium.
  • a power generation system includes an integrated intermediate medium vaporizer with cold energy utilization, a booster module composed of a working fluid pump, and a power module composed of a turbine, and the low-pressure liquid intermediate circulating medium outlet is connected to the booster module.
  • the outlet of the booster module is connected to the inlet of the high-pressure liquid intermediate circulation medium
  • the outlet of the high-pressure gaseous intermediate circulation medium is connected to the inlet of the power module
  • the outlet of the power module is connected to the inlet of the low-pressure gaseous intermediate circulation medium , constitute a first-level Rankine cycle power generation system.
  • a power generation system comprising an integrated intermediate medium vaporizer with cooling energy that divides an intermediate circulating medium condensation heat exchange channel into a plurality of intermediate circulating medium condensation zones in sequence according to the aforementioned method, a combined intermediate medium vaporizer, and a multi-condensed multi-purpose pump composed of two or more working fluid pumps. It is composed of a booster module with a liquid medium inlet and a power module with multiple gaseous medium outlets formed by combining two or more turbines.
  • the low-pressure liquid intermediate circulating medium outlet of each intermediate circulating medium condensation area is connected to the The multi-channel liquid medium inlet of the booster module, the outlet of the booster module is connected to the high-pressure liquid intermediate circulation medium inlet of the intermediate circulation medium evaporation zone, the high-pressure gaseous intermediate circulation medium outlet is connected to the inlet of the power module,
  • the power module forms multiple outlets and is respectively connected to the low-pressure gaseous intermediate circulation medium inlet of each intermediate circulation medium condensation zone, forming a multi-stage parallel cascaded Rankine cycle power generation system composed of a single circulating working medium.
  • a power generation system comprising dividing the intermediate circulation medium condensation heat exchange channel and the intermediate circulation medium evaporation area into two areas (the first intermediate circulation medium condensation area and the second intermediate circulation medium condensation area, the first intermediate circulation medium condensation area, the first intermediate circulation medium condensation area.
  • the belt cooling energy of the medium evaporation zone and the second intermediate circulation medium evaporation zone) utilizes an integrated intermediate medium vaporizer, a first working fluid pump, a second working fluid pump, a first turbine and a second turbine, the said The intermediate circulation medium condensation heat exchange channel is divided into the first intermediate circulation medium condensation area and the second intermediate circulation medium condensation area, and the intermediate circulation medium evaporation area is divided into the first intermediate circulation medium evaporation area and the second intermediate circulation medium Medium evaporation area, the first intermediate circulating medium condensation area is close to the NG outlet side, and the second intermediate circulating medium condensation area is close to the LNG inlet side; the shell is located in the middle of the first type
  • the circulating medium condensation area is provided with a first low-pressure gaseous intermediate
  • the first intermediate circulating medium evaporation area is provided with a first high-pressure liquid intermediate circulating medium inlet and a first high-pressure gaseous intermediate circulating medium outlet.
  • the end is provided with a first type of heat source medium inlet and a first type of heat source medium outlet;
  • the second type of intermediate circulation medium evaporation area is provided with a second type of high-pressure liquid intermediate circulation medium inlet and a second type of high-pressure gaseous intermediate circulation medium outlet.
  • the left and right ends of the countercurrent heat exchange mode are respectively provided with a second type of heat source medium inlet and a second type of heat source medium outlet
  • the first type of low-pressure liquid intermediate circulating medium outlet is connected to the inlet of the first working fluid pump
  • the first The outlet of the working fluid pump is connected to the inlet of the first high-pressure liquid intermediate circulating medium
  • the outlet of the first high-pressure gaseous intermediate circulating medium is connected to the inlet of the first turbine
  • the exhaust of the first turbine The outlet is connected to the inlet of the first low-pressure gaseous intermediate circulating medium
  • the outlet of the second low-pressure liquid intermediate circulating medium is connected to the inlet of the second working fluid pump
  • the outlet of the second working fluid pump is connected to the second working fluid pump.
  • a high-pressure liquid intermediate circulating medium inlet, the second high-pressure gaseous intermediate circulating medium outlet is connected to the inlet of the second turbine, and the exhaust outlet of the second turbine is connected to the second low-pressure gaseous intermediate
  • the circulating medium inlet constitutes a corresponding two-stage series cascaded Rankine cycle power generation system composed of two heat source mediums and two circulating working fluids.
  • a power generation system includes dividing the intermediate circulation medium condensation heat exchange channel and the intermediate circulation medium evaporation area into three areas (the circulation medium condensation area for other low-grade cold energy utilization, the first intermediate circulation medium condensation area and the second intermediate circulation medium condensation area.
  • One intermediate circulation medium condensation area, the first intermediate circulation medium evaporation area, the third intermediate circulation medium evaporation area, the second intermediate circulation medium and the third intermediate circulation medium heat exchange to make the second intermediate circulation medium vaporize.
  • the cooling energy of the evaporator utilizes the integrated intermediate medium vaporizer, the first working fluid pump, the second working fluid pump, the third working fluid pump, the first turbine, the second turbine and the third turbine,
  • the intermediate circulating medium condensation heat exchange channel is divided into a circulating medium condensation area for low-grade cold energy utilization, a first intermediate circulating medium condensation area and a second intermediate circulating medium condensation area, which are arranged in sequence.
  • the used circulating medium condensation area is close to the NG outlet side, and the second intermediate circulating medium condensation area is close to the LNG inlet side; the intermediate circulating medium evaporation area is divided into the first intermediate circulating medium evaporation area, The third intermediate circulation medium evaporation area and the intermediate evaporation area, the intermediate evaporation area is used for the heat exchange between the second intermediate circulation medium and the third intermediate circulation medium to vaporize the second intermediate circulation medium.
  • the first intermediate circulating medium condensation zone is provided with a first low-pressure gaseous intermediate circulating medium inlet and a first low-pressure liquid intermediate circulating medium outlet.
  • the first type of intermediate circulation medium evaporation zone is provided with a first high-pressure liquid intermediate circulation medium inlet and a first high-pressure gaseous intermediate circulation medium outlet
  • the third type of intermediate circulation medium evaporation area is provided with a third high-pressure liquid intermediate circulation medium inlet and a third high-pressure gaseous intermediate circulation medium outlet
  • the intermediate evaporation area is provided with a second type of high-pressure liquid intermediate circulation medium inlet, a third type of high-pressure liquid intermediate circulation medium inlet, Two high-pressure gaseous intermediate circulating medium outlets, a third low-pressure gaseous intermediate circulating medium inlet and a third low-pressure liquid intermediate circulating medium outlet
  • the first low-pressure liquid intermediate circulating medium outlet is connected to the inlet of the first working fluid pump, so The outlet of the first working fluid pump is connected to the inlet of the first high-pressure liquid intermediate circulating medium, the outlet of the first high-pressure gaseous intermediate
  • the gas outlet is connected to the inlet of the first low-pressure gaseous intermediate circulating medium; the outlet of the second low-pressure liquid intermediate circulating medium is connected to the inlet of the second working fluid pump, and the outlet of the second working fluid pump is connected to the second working fluid pump.
  • the second type of high-pressure gaseous intermediate circulation medium outlet is connected to the second turbine, and the exhaust outlet of the second turbine is connected to the second low-pressure gaseous intermediate circulation medium
  • the medium inlet; the outlet of the third low-pressure liquid intermediate circulating medium is connected to the inlet of the third working fluid pump, and the exhaust outlet of the third working fluid pump is connected to the inlet of the third high-pressure liquid intermediate circulating medium, so the third The outlet of the high-pressure gaseous intermediate circulating medium is connected to the third turbine, and the exhaust outlet of the third turbine is connected to the inlet of the third low-pressure gaseous intermediate circulating medium, forming two heat source media and three circulating working fluids Two parallel and two series cascaded Rankine cycle power generation systems.
  • the present invention has the advantages that: in the present invention, the intermediate circulating medium after generating electricity by the turbine utilizes a large amount of cold energy released during the vaporization of LNG to be condensed and liquefied as a cold source, and then pressurized by the working fluid pump.
  • the present invention can adapt to the number of condensers and evaporators in the multi-stage series/parallel cascaded Rankine cycle constructed under the requirements of different vaporization amounts according to the amount of LNG vaporization. , by separating the corresponding number of condensation areas and the number of evaporation areas for the condensing/evaporating circulating medium of different needs by separating the channels of the intermediate circulating medium condensation area of the vaporizer and the intermediate circulating medium evaporation area at the lower left of the vaporizer for the entry and exit of the condensing/evaporating circulating medium, so that the LNG vaporization can be flexibly and conveniently
  • the power generation system composed of multi-stage series/parallel Rankine cycle is composed of the size of the quantity, so as to realize the high-efficiency cascade utilization of cold energy.
  • three different heat pipe working fluids are used for the three groups of heat pipes according to the working temperature, so as to ensure that the three groups of heat pipes work normally during the heat exchange process and each heat exchange channel will not be blocked by ice.
  • the NG from the NG outlet of the vaporizer LNG channel can exchange heat with the heat source medium in the heat source medium heat exchange channel, so that the NG can further absorb heat and heat up to the set temperature, so as to facilitate subsequent use.
  • FIG. 1 is a schematic structural diagram of a single-stage Rankine cycle power generation system composed of an integrated intermediate medium vaporizer with cold energy utilization according to the present invention.
  • FIG. 2 is a schematic diagram of the structure of the first separator.
  • FIG. 3 is a schematic structural diagram of a two-stage parallel cascaded Rankine cycle power generation system composed of an integrated intermediate medium vaporizer with cold energy utilization and a single cycle working fluid.
  • FIG. 4 is a schematic structural diagram of a first combination mode of booster modules of a two-stage cascaded Rankine cycle power generation system.
  • FIG. 5 is a schematic structural diagram of a second combination of booster modules of a two-stage cascaded Rankine cycle power generation system.
  • FIG. 6 is a schematic structural diagram of a first combination mode of power modules of a two-stage cascaded Rankine cycle power generation system.
  • FIG. 7 is a schematic structural diagram of a second combination mode of power modules of a two-stage cascaded Rankine cycle power generation system.
  • FIG. 8 is a schematic structural diagram of a three-stage parallel cascaded Rankine cycle power generation system composed of an integrated intermediate medium vaporizer with cold energy utilization and a single cycle working fluid.
  • FIG. 9 is a schematic structural diagram of a first combination mode of booster modules of a three-stage cascaded Rankine cycle power generation system.
  • FIG. 10 is a schematic structural diagram of a second combination of booster modules of a three-stage cascaded Rankine cycle power generation system.
  • FIG. 11 is a schematic structural diagram of a third combination of booster modules of a three-stage cascaded Rankine cycle power generation system.
  • FIG. 12 is a schematic structural diagram of a first combination mode of power modules of a three-stage cascaded Rankine cycle power generation system.
  • FIG. 13 is a schematic structural diagram of a second combination mode of power modules of a three-stage cascaded Rankine cycle power generation system.
  • FIG. 14 is a schematic structural diagram of a third combination mode of power modules of a three-stage cascaded Rankine cycle power generation system.
  • FIG. 15 is a schematic structural diagram of an integrated intermediate medium vaporizer with cold energy utilization and a two-stage series cascaded Rankine cycle power generation system composed of two circulating working fluids.
  • FIG. 16 is a schematic structural diagram of an integrated intermediate medium vaporizer with cold energy utilization and a cascaded cycle power generation system composed of two heat source media and three circulating working fluids.
  • the integrated intermediate medium vaporizer 1 with cold energy utilization involved in the present invention includes a casing 2 .
  • the casing 2 is a rectangular assembly with the inlet and outlet faces of the working medium on both sides designed as semi-cylindrical shapes.
  • the inner cavity of the body 2 is a heat exchange cavity, and the shell 2 is provided with a LNG vaporization heat exchange channel 3, an intermediate circulation medium heat exchange channel 4 and a heat source medium heat exchange channel 5 that divide the heat exchange cavity into parallel distribution.
  • the first separator 6 and the second separator 7 .
  • the first baffle 6 and the second baffle 7 are arranged horizontally and the casing 2 is fixed by welding.
  • the LNG vaporization heat exchange channel 3, the intermediate circulation medium heat exchange channel 4 and the heat source medium heat exchange channel 5 are up and down. Directions overlap.
  • the heat source medium heat exchange channel 5 there is also a middle partition plate 8 that divides the heat source medium heat exchange channel 5 into left and right sections, and the middle partition plate 8 is welded with the lower surface of the second partition plate 7 and the shell The inner wall of the body 2 is fixedly connected.
  • the left part of the heat source medium heat exchange channel 5 is the intermediate circulation medium evaporation area 9
  • the right part is the NG temperature adjustment area 10 .
  • a plurality of through holes 23 are opened on the first partition plate 6 , and these through holes 23 are arranged in a cross-arrangement, from the right (the side of the LNG inlet 11 ) to the through holes 23 .
  • the first heat pipe group 24 , the second heat pipe group 25 , and the third heat pipe group 26 are inserted in the left side (the side of the NG outlet 12 ).
  • the first heat pipe group 24 , the second heat pipe group 25 and the third heat pipe group 26 all extend through the first partition plate 6 from the LNG vaporization heat exchange channel 3 to the intermediate circulating medium heat exchange channel 4 . According to the temperature change after the LNG vaporization and heating up, three heat pipe group areas with different working media are set up.
  • the working medium in the first heat pipe group 24 located near the LNG inlet 11 adopts methane
  • the working medium in the second heat pipe group 25 in the middle adopts ethane
  • the working medium of the third heat pipe group 26 near the NG outlet 12 uses propane. Different working fluids are used in each heat pipe, so as to ensure that each heat pipe works normally during the heat exchange process and each channel will not be blocked by ice.
  • An LNG inlet 11 and an NG outlet 12 are provided on both ends of the LNG heat exchange channel 3 on the shell 2 of the integrated intermediate circulation medium vaporizer 1, and a low pressure is provided on the shell 2 at both ends of the intermediate circulation medium heat exchange channel 4 Gaseous intermediate circulation medium inlet 13 and low pressure liquid intermediate circulation medium outlet 14 , and low pressure gaseous intermediate circulation medium inlet 13 is close to NG outlet 12 , and low pressure liquid intermediate circulation medium outlet 14 is close to LNG inlet 11 .
  • the low-pressure gaseous intermediate circulation medium inlet 13 and the NG outlet 12 are both located at the left end of the casing 2
  • the low-pressure liquid intermediate circulation medium outlet 14 and the LNG inlet 11 are both located at the right end of the casing 2 .
  • a high-pressure liquid intermediate circulating medium inlet 19 and a high-pressure gaseous intermediate circulating medium outlet 20 are located in the intermediate circulating medium evaporation area 9 on the shell 2 , and a horizontal first heat source medium tube bundle is arranged in the intermediate circulating medium evaporation area 9.
  • the first heat source medium The tube bundle is drawn from the casing to form the first heat source medium inlet 15 and the first heat source medium outlet 16; the casing 2 is located in the NG temperature adjustment zone 10 with a temperature regulator NG inlet 21 and a temperature regulator NG outlet 22, NG temperature regulation A horizontal second heat source medium tube bundle is arranged in the zone 10 , and the second heat source medium tube bundle is led out from the casing to form a second heat source medium inlet 17 and a second heat source medium outlet 18 .
  • the power generation system composed of the above-mentioned integrated intermediate medium vaporizer with cold energy utilization includes an integrated intermediate circulating medium vaporizer 1, a working fluid pump 27 and a turbine 28, wherein the working fluid pump 27 constitutes the intermediate circulating medium.
  • the booster module S2 The turbine 28 constitutes a work module S1 that mediates the circulating medium.
  • a turbine 28 is used between the low-pressure gaseous intermediate circulating medium inlet 13 and the high-pressure gaseous intermediate circulating medium outlet 20 to realize the work and circulation of the intermediate circulating medium, and the low-pressure liquid intermediate circulating medium outlet 14 and the high-pressure liquid intermediate circulating medium inlet 19 pass through A working fluid pump 27 realizes the pressurization and circulation of the intermediate circulating medium, and constitutes a single-stage organic Rankine power generation cycle system.
  • the heat source medium goes through the tube bundle process
  • the intermediate circulating medium goes through the shell side
  • the high-pressure liquid intermediate circulating medium inlet 19 is connected to the working fluid pump 27, and the high-pressure gaseous intermediate circulating medium outlet 20 is connected to the turbine 28.
  • the heat source medium goes through the tube bundle process, and the NG goes through the shell side.
  • the NG inlet 21 of the thermostat is connected to the NG outlet 12 of the LNG heat exchange channel 3 through the temperature adjustment liquid inlet pipeline, so that the LNG heat exchange channel 3
  • the NG coming out of the NG outlet 12 exchanges heat with the heat source medium in the heat source medium heat exchange channel 5, so that the NG can further absorb heat and heat up to a set temperature, so as to facilitate subsequent use.
  • LNG heat exchange process LNG in the initial state (state parameters: 1.5MPa, about -162°C) flows in from the LNG inlet 11 on the right side of the shell 2, and the LNG flows through the first heat pipe group 24 in the heat exchange area at the front of the vaporizer, Fully absorb the heat released by propane; in the heat exchange area in the middle of the vaporizer, it becomes a gas-liquid two-phase state; when it flows to the heat exchange area at the rear of the vaporizer, it becomes a superheated NG state, and the LNG at this time becomes -50 ⁇ -45 °C Gaseous NG; gaseous NG flows into the NG temperature adjustment zone 10 through the NG temperature adjustment inlet pipe, and further absorbs heat to 5-15°C, and finally the heated NG flows out from the NG temperature adjustment outlet pipe for use by users.
  • state parameters: 1.5MPa, about -162°C flows in from the LNG inlet 11 on the right side of the shell 2
  • the LNG flows through the first heat pipe group 24 in the heat exchange area
  • Propane heat exchange process low-temperature and low-pressure gaseous propane (state parameter: 0.11MPa, about -40°C) flowing out of the turbine 28 flows into the intermediate circulation medium heat exchange channel from the low-pressure gaseous intermediate circulation medium inlet 13 on the left side of the shell 2 4.
  • the vaporized cold energy released by LNG is absorbed into a liquid state, and the liquid propane (state parameter: 0.1MPa, - 42°C) into the working fluid pump 27, after which the propane is pressurized by the working fluid pump 27 and then becomes a low-temperature and high-pressure liquid state (state parameter: 0.73MPa, about -42°C) from the high-pressure liquid intermediate of the intermediate circulating medium evaporation zone 9
  • the circulating medium inlet 19 flows into the shell side of the intermediate circulating medium evaporation zone 9, and exchanges heat with the heat source medium in the pipeline, and the liquid propane of low temperature and high pressure absorbs the heat of the heat source medium and becomes gaseous propane of high temperature and high pressure (state parameter: 0.73MPa, 15°C), and then flows out from the high-pressure gaseous intermediate circulating medium outlet 20, and drives the generator to work through the turbine 28 to generate electrical energy.
  • the mechanical work that the turbine 28 can output is
  • the heat exchange process of the heat source medium in the intermediate circulation medium evaporation zone 9 The heat source medium (eg: seawater state parameters: 0.1MPa, about 20°C) enters the heat source medium pipeline of the intermediate circulation medium evaporation zone 9 from the heat source medium inlet 15, and is connected with the shell.
  • the high pressure and low temperature liquid propane in the process is heat exchanged to vaporize it, and the heat source medium seawater as the exothermic medium in the whole process is reduced from 20 °C to 14-15 °C.
  • the heat exchange process of the heat source medium in the NG heat exchange area 10 the heat source medium also takes seawater (state parameter: 0.1MPa, about 20°C) from the heat source medium inlet 17 into the heat source medium pipeline of the NG heat exchange area 10, and is in the shell side.
  • the NG carries out heat exchange to raise the temperature to the set temperature.
  • the heat source medium seawater as the exothermic medium is reduced from 20°C to 14-15°C.
  • the intermediate circulation medium evaporation area 9 is a separate heat source medium tube bundle heat exchange area, so according to the number of condensers in the constructed multi-stage cascade cold energy utilization system, the corresponding number of intermediate circulating medium condensation heat exchange channels 4 can be separated for heat exchange with LNG as required.
  • the condensed different circulating media can enter and exit.
  • the intermediate circulating medium condensation heat exchange channel 4 is divided into two or three sequentially arranged from the left (the side of the NG outlet 12) to the right (the side of the LNG inlet 11).
  • the condensing area at the inlet and outlet of the refrigerant is then constructed, and then a two-stage or three-stage parallel cascaded Rankine cycle power generation system with a single working medium is constructed.
  • the intermediate circulating medium condensation heat exchange channel 4 is divided into a high temperature intermediate circulating medium condensation area 4a and a low temperature intermediate circulating medium arranged on the left and right.
  • the condensation zone 4b, the high temperature intermediate circulating medium condensation zone 4a is close to the NG outlet, and the low temperature intermediate circulating medium condensation zone 4b is close to the LNG inlet.
  • a first low-pressure gaseous intermediate circulating medium inlet 13a is arranged at the left end of the high-temperature intermediate circulating medium condensation zone 4a, and a first low-pressure liquid intermediate circulating medium outlet 14a is arranged on the right end.
  • the left end is provided with a second low-pressure gaseous intermediate circulating medium inlet 13b
  • the right end is provided with a second low-pressure liquid intermediate circulating medium outlet 14b.
  • the first low-pressure liquid intermediate circulating medium outlet 14a and the second low-pressure liquid intermediate circulating medium outlet 14b are both connected to the booster module S1 to pressurize the intermediate circulating medium, while the power module S2 forms two outputs that are respectively connected to the first low-pressure gaseous intermediate
  • the booster module S1 includes a first working fluid pump 27a and a second working fluid pump 27b.
  • the inlets of the working fluid pump 27a and the second working fluid pump 27b are respectively connected to the first low-pressure liquid intermediate circulating medium outlet 14a and the second low-pressure liquid intermediate circulating medium outlet 14b, and the outlets of the first working fluid pump 27a and the second working fluid pump 27b After the working medium is mixed, it is connected to the intermediate circulating medium evaporation zone 9; or the inlet of the second working medium pump 27b is connected to the second low-pressure liquid intermediate circulating medium outlet 14b, and the outlet working medium of the second working medium pump 27b is connected to the liquid from the first low-pressure liquid.
  • the low-pressure liquid intermediate circulating medium from the intermediate circulating medium outlet 14a is mixed and connected to the inlet of the first working fluid pump 27a, and the outlet of the first working fluid pump 27a is then connected to the intermediate circulating medium evaporation zone 9.
  • the turbine combination structure of the power module S2 of the two-stage cascaded Rankine cycle power generation system is shown in Figures 6 and 7.
  • the power module S2 includes a first turbine 28a and a second turbine 28b, and the intermediate circulating medium evaporates
  • the high-pressure gaseous intermediate circulating medium outlet 20 of zone 9 is connected to the first turbine 28a and the second turbine 28b, respectively, the exhaust outlet of the first turbine 28a is connected to the first low-pressure gaseous intermediate circulating medium inlet 13a, and the first turbine 28a is connected to the first low-pressure gaseous intermediate circulating medium inlet 13a.
  • the exhaust outlet of the second turbine 28b is connected to the second low-pressure gaseous intermediate circulating medium inlet 13b, or the high-pressure gaseous intermediate circulating medium outlet 20 of the intermediate circulating medium evaporation zone 9 is connected to the first turbine 28a, the first turbine
  • the exhaust outlet medium of the turbine 28a is divided into two streams, one is connected to the first low-pressure gaseous intermediate circulating medium inlet 13a, and the other is connected to the second turbine 28b to continue doing work, and the exhaust outlet of the second turbine 28b is connected to To the second low pressure gaseous intermediate circulating medium inlet 13b.
  • the intermediate circulation medium condensation heat exchange channel 4 is divided into a high temperature intermediate circulation medium condensation zone 4a, a middle temperature intermediate circulation medium condensing zone 4a arranged from left to right
  • the intermediate circulating medium condensing zone 4b and the low-temperature intermediate circulating medium condensing zone 4c, the high-temperature intermediate circulating medium condensing zone 4a is close to the NG outlet, and the low-temperature intermediate circulating medium condensing zone 4c is close to the LNG inlet.
  • a first low-pressure gaseous intermediate circulating medium inlet 13a is arranged at the left end of the high-temperature intermediate circulating medium condensation zone 4a, and a first low-pressure liquid intermediate circulating medium outlet 14a is arranged on the right end;
  • the left end is provided with a second low-pressure gaseous intermediate circulating medium inlet 13b, and the right end is provided with a second low-pressure liquid intermediate circulating medium outlet 14b;
  • the left end of the housing 2 located in the low-temperature intermediate circulating medium condensation zone 4c is provided with a third low-pressure gaseous intermediate circulating medium inlet 13c, and the right end is provided with a third low-pressure gaseous intermediate circulating medium inlet 13c.
  • a third low-pressure liquid intermediate circulating medium outlet 14c is provided.
  • the first low-pressure liquid intermediate circulating medium outlet 14a, the second low-pressure liquid intermediate circulating medium outlet 14b and the third low-pressure liquid intermediate circulating medium outlet 14c are all connected to the booster module S1 to pressurize the intermediate medium, and the power module S2 forms a three-way
  • the outputs are respectively connected to the first low-pressure gaseous intermediate circulation medium inlet 13a, the second low-pressure gaseous intermediate circulation medium inlet 13b and the third low-pressure gaseous intermediate circulation medium inlet 13c, wherein the temperature of the intermediate circulation medium of the first low-pressure gaseous intermediate circulation medium inlet 13a is high
  • the intermediate circulation medium temperature at the second low pressure gaseous intermediate circulation medium inlet 13b is higher than that of the third low pressure gaseous intermediate circulation medium inlet 13c.
  • the booster module S1 includes a first working fluid pump 27a, a second working fluid The pump 27b and the third working fluid pump 27c, the inlets of the first working fluid pump 27a, the second working fluid pump 27b and the third working fluid pump 27c are respectively connected to the first low pressure liquid intermediate circulation medium outlet 14a, the second low pressure liquid intermediate circulation medium The medium outlet 14b and the third low-pressure liquid intermediate circulating medium outlet 14c, the outlet working fluids of the first working fluid pump 27a, the second working fluid pump 27b and the third working fluid pump 27c are mixed and connected to the intermediate circulating medium evaporation zone 9; or
  • the inlet of the second working fluid pump 27b is connected to the second low-pressure liquid intermediate circulating medium outlet 14b
  • the inlet of the third working fluid pump 27c is connected to the third low-pressure liquid intermediate circulating medium outlet 14c, the second working fluid pump 27b and the
  • the turbine assembly structure of the power module S2 of the three-stage parallel cascaded Rankine cycle power generation system is shown in Figures 12, 13 and 14.
  • the power module S2 includes a first turbine 28a and a second turbine 28b and the third turbine 28c, the high-pressure gaseous intermediate circulating medium outlet 20 of the intermediate circulating medium evaporation zone 9 is respectively connected to the first turbine 28a, the second turbine 28b and the third turbine 28c, the first turbine
  • the exhaust outlet of the turbine 28a is connected to the first low-pressure gaseous intermediate circulating medium inlet 13a
  • the exhaust outlet of the second turbine 28b is connected to the second low-pressure gaseous intermediate circulating medium inlet 13b
  • the exhaust outlet of the third turbine 28c Connected to the third low-pressure gaseous intermediate circulating medium inlet 13c, or the high-pressure gaseous intermediate circulating medium outlet 20 of the intermediate circulating medium evaporation zone 9 is connected to the first turbine 28a, and the exhaust outlets of the first turbine 28a are respectively connected to The
  • the first turbine 28a The exhaust outlet is connected to the first low-pressure gaseous intermediate circulating medium inlet 13a and the second turbine 28b, and the exhaust outlet of the second turbine 28b is connected to the second low-pressure gaseous intermediate circulating medium inlet 13b and the third turbine 28c , the exhaust outlet of the third turbine 28c is connected to the third low-pressure gaseous intermediate circulating medium inlet 13c.
  • the working fluid constructs a series/parallel cascade circulation system to realize the cascade utilization of cold energy.
  • the intermediate circulating medium condensation heat exchange channel 4 is divided into the first type arranged on the left and right.
  • the shell 2 is provided with a first low-pressure gaseous intermediate circulating medium inlet 13a at the left end of the condensation zone 4a of the first intermediate circulating medium, and a first low-pressure liquid intermediate circulating medium outlet 14a on the right end, and the shell 2 is located in the middle of the second medium.
  • the left end of the circulating medium condensation zone 4b is provided with a second low-pressure gaseous intermediate circulating medium inlet 13b, and the right end is provided with a second low-pressure liquid intermediate circulating medium outlet 14b.
  • the intermediate circulation medium evaporation area 9 is divided into a first type of intermediate circulation medium evaporation area 9a and a second type of intermediate circulation medium evaporation area 9b arranged on the left and right.
  • the left and right ends of the first type of intermediate circulation medium evaporation area 9a are respectively provided with a first type of heat source medium.
  • the inlet 15a and the first heat source medium outlet 16a, while the left and right ends of the first intermediate circulation medium evaporation area 9a are respectively provided with the first high pressure liquid intermediate circulation medium inlet 19a and the first high pressure gaseous intermediate circulation medium outlet 20a;
  • the second The second type of heat source medium inlet 15b and the second type of heat source medium outlet 16b are respectively provided at the left and right ends of the intermediate circulation medium evaporation area 9, while the left and right ends of the second type of intermediate circulation medium evaporation area 9b are respectively provided with a second type of high-pressure liquid intermediate
  • the circulating medium inlet 19b and the second high-pressure gaseous intermediate circulating medium outlet 20b are respectively provided with a second type of high-pressure liquid intermediate
  • the first low-pressure liquid intermediate circulating medium outlet 14a is connected to the inlet of the first working fluid pump 27a, the first working fluid pump 27a outlet is connected to the first high-pressure liquid intermediate circulating medium inlet 19a, and the first high-pressure gaseous intermediate circulating medium outlet 20a is connected to the first working fluid pump 27a.
  • a turbine 28a, the exhaust outlet of the first turbine 28a is connected to the first low-pressure gaseous intermediate circulating medium inlet 13a.
  • the second low-pressure liquid intermediate circulating medium outlet 14b is connected to the second working fluid pump 27b inlet, the second working fluid pump 27b outlet is connected to the second high-pressure liquid intermediate circulating medium inlet 19b, and the second high-pressure gaseous intermediate circulating medium outlet 20b is connected to the second working fluid pump 27b.
  • the second turbine 28b, the exhaust of the second turbine 28b is connected to the second low-pressure gaseous intermediate circulating medium inlet 13b. That is, a two-stage series cascaded Rankine cycle power generation system composed of two heat source media and two circulating working fluids is realized.
  • the intermediate circulating medium condensing heat exchange channel 4 Divided into other low-grade cold energy utilization circulating medium condensation area 4a, first intermediate circulating medium condensation area 4b and second intermediate circulating medium condensation area 4c arranged from left to right, first intermediate circulating medium condensation area 4b In the center, the second intermediate circulating medium condensation zone 4c is close to the LNG inlet.
  • the shell 2 is provided with a first low-pressure gaseous intermediate circulating medium inlet 13b at the left end of the condensation zone 4b of the first intermediate circulating medium, and a first low-pressure liquid intermediate circulating medium outlet 14b on the right end; the shell 2 is located in the middle of the second medium
  • the left end of the circulating medium condensation zone 4c is provided with a second low-pressure gaseous intermediate circulating medium inlet 13c, and the right end is provided with a second low-pressure liquid intermediate circulating medium outlet 14c.
  • the intermediate circulating medium evaporation area 9 is divided into a first intermediate circulating medium evaporation area 9a and a third intermediate circulating medium evaporation area 9b arranged from left to right, and the second circulating medium and the third circulating medium heat exchange (so that the Evaporator 9c for the vaporization of two circulating media).
  • the left and right ends of the first intermediate circulating medium evaporation area 9a are respectively provided with the first high-pressure liquid intermediate circulating medium inlet 19a and the first high-pressure gaseous intermediate circulating medium outlet 20a.
  • the heat source medium inlet 15a and the first heat source medium outlet 16a; the left and right ends of the third type of intermediate circulation medium evaporation area 9b are respectively provided with a third type of high-pressure liquid intermediate circulation medium inlet 19b and a third high-pressure gaseous intermediate circulation medium outlet 20b.
  • the left and right ends are respectively provided with a second type of heat source medium inlet 15b and a first type of heat source medium outlet 16b according to countercurrent heat exchange;
  • At the gaseous intermediate circulating medium outlet 20c, the left and right ends are respectively provided with a third low-pressure gaseous circulating medium inlet 15c and a third low-pressure liquid circulating medium outlet 16c according to countercurrent heat exchange.
  • the first low-pressure liquid intermediate circulating medium outlet 14b is connected to the inlet of the first working fluid pump 27a, the first working fluid pump 27a outlet is connected to the first high-pressure liquid intermediate circulating medium inlet 19a, and the first high-pressure gaseous intermediate circulating medium outlet 20a is connected to the first working fluid pump 27a.
  • a turbine 28a, the exhaust outlet of the first turbine 28a is connected to the first low-pressure gaseous intermediate circulating medium inlet 13b; the second low-pressure liquid intermediate circulating medium outlet 14c is connected to the second working fluid pump 27b inlet, the second working medium
  • the outlet of the mass pump 27b is connected to the inlet 19c of the second high-pressure liquid intermediate circulating medium.
  • the outlet 20c of the second high-pressure gaseous intermediate circulating medium is connected to the second turbine 28b, and the discharge of the second turbine 28b is The gas is connected to the second low-pressure gaseous intermediate circulating medium inlet 13c.
  • the third high-pressure gaseous intermediate circulating medium outlet 20b is connected to the third turbine 28c, the exhaust of the third turbine 28c is connected to the third low-pressure gaseous circulating medium inlet 15c of the evaporation zone 9c, and the third low-pressure liquid circulating medium outlet 16c is connected to the inlet of the third working fluid pump 27c, and the outlet of the third working fluid pump 27c is connected to the third high-pressure liquid intermediate circulating medium inlet 19b of the third intermediate circulating medium evaporation zone 9b. That is, a cascade cycle power generation system composed of two heat source media and three circulating working fluids is realized.

Abstract

La présente invention concerne un vaporisateur de fluide intermédiaire intégré présentant une fonction d'utilisation d'énergie froide comprenant un boîtier. L'intérieur du boîtier est divisé par une première plaque de séparation et une seconde plaque de séparation pour former un canal d'échange de chaleur de vaporisation de GNL, un canal d'échange de chaleur de milieu de circulation intermédiaire, et un canal d'échange de chaleur de milieu de source de chaleur qui sont agencés séquentiellement en parallèle ; une pluralité d'ensembles caloducs pénètrent à travers la première plaque de séparation ; le canal d'échange de chaleur de vaporisation de GNL est doté d'une entrée de GNL et d'une sortie de GN ; le canal d'échange de chaleur de milieu de circulation intermédiaire est doté d'une entrée de milieu de circulation intermédiaire gazeux basse pression et d'une sortie de milieu de circulation intermédiaire liquide basse pression ; le canal d'échange de chaleur de milieu de source de chaleur est divisé en une zone d'évaporation de milieu de circulation intermédiaire et une zone de régulation de température de GN ; la zone d'évaporation de milieu de circulation intermédiaire est dotée d'une sortie de milieu de circulation intermédiaire gazeux haute pression et d'une entrée de milieu de circulation intermédiaire liquide haute pression ; la zone de régulation de température de GN est dotée d'une entrée de GN de régulateur de température et d'une sortie de GN de régulateur de température ; et l'entrée de GN de régulateur de température est reliée à la sortie de GN de régulateur de température. La présente invention concerne en outre un système de génération de puissance à cycle de Rankine en cascade à étage unique et à étages multiples composé du vaporisateur de manière à s'adapter à différentes exigences de quantité de vaporisation et à obtenir une utilisation de gradient d'énergie froide de GNL.
PCT/CN2021/080656 2021-03-10 2021-03-15 Vaporisateur de fluide intermédiaire intégré présentant une fonction d'utilisation d'énergie froide et système de génération de puissance composé de celui-ci WO2022188188A1 (fr)

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JP2005098240A (ja) * 2003-09-25 2005-04-14 Tokyo Electric Power Co Inc:The 発電システム
CN103075250A (zh) * 2012-11-08 2013-05-01 暨南大学 一种梯级利用液化天然气冷能发电的方法
JP2016008042A (ja) * 2014-06-25 2016-01-18 潮冷熱株式会社 Ｌｎｇ船のバイナリー発電システム
CN105509523A (zh) * 2015-12-15 2016-04-20 武汉工程大学 采用热管的lng汽化器
CN106194302A (zh) * 2016-08-31 2016-12-07 航天晨光股份有限公司 一种lng冷能综合利用系统及方法
CN110094239A (zh) * 2018-04-23 2019-08-06 江苏科技大学 一种带lng冷能利用功能的整体式中间介质汽化器及发电系统
CN110847987A (zh) * 2019-12-24 2020-02-28 青岛中稷龙源能源科技有限公司 一种混合工质的lng冷能发电和综合利用系统及方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005098240A (ja) * 2003-09-25 2005-04-14 Tokyo Electric Power Co Inc:The 発電システム
CN103075250A (zh) * 2012-11-08 2013-05-01 暨南大学 一种梯级利用液化天然气冷能发电的方法
JP2016008042A (ja) * 2014-06-25 2016-01-18 潮冷熱株式会社 Ｌｎｇ船のバイナリー発電システム
CN105509523A (zh) * 2015-12-15 2016-04-20 武汉工程大学 采用热管的lng汽化器
CN106194302A (zh) * 2016-08-31 2016-12-07 航天晨光股份有限公司 一种lng冷能综合利用系统及方法
CN110094239A (zh) * 2018-04-23 2019-08-06 江苏科技大学 一种带lng冷能利用功能的整体式中间介质汽化器及发电系统
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