WO2019205509A1

WO2019205509A1 - Integral intermediate medium vaporiser with lng cold energy utilisation function, and power-generating system

Info

Publication number: WO2019205509A1
Application number: PCT/CN2018/110469
Authority: WO
Inventors: 姚寿广; 李锦峰; 陆政德; 江镇宇; 杨琦国
Original assignee: 江苏科技大学
Priority date: 2018-04-23
Filing date: 2018-10-16
Publication date: 2019-10-31
Also published as: CN110094239A; CN110094239B; CN110080846A

Abstract

An integral intermediate medium vaporiser (1) with an LNG cold energy utilisation function, and a power-generating system based on the integral intermediate medium vaporiser, the vaporiser (1) comprising a housing (2), a heat exchange cavity being provided in the housing (2), the heat exchange cavity being divided into a vaporiser front heat exchange region and a vaporiser rear heat exchange region, a first separating plate (20) and a second separating plate (19) for dividing the heat exchange cavity into an LNG heat exchange channel (22), an intermediate medium heat exchange channel (23), and a seawater heat exchange channel (24) distributed in sequence also being arranged in the housing (2), a middle separating plate (17) for dividing the intermediate medium heat exchange channel into two ends being connected between the first separating plate (20) and the second separating plate (19), a plurality of through-holes being provided on both the first separating plate (20) and the second separating plate (19), and a heat pipe assembly being inserted into the through-holes; the use of the present integral intermediate medium vaporiser when using LNG vaporisation cold energy to generate power greatly saves equipment investment, reduces the space occupied, and achieves the objective of efficient energy saving and emission reduction of the system.

Description

Integral intermediate medium vaporizer and power generation system with LNG cold energy utilization function

Technical field

The invention relates to the field of cold energy utilization of liquefied natural gas, in particular to a monolithic intermediate medium vaporizer with LNG cold energy utilization function, and to a power generation system based on the above integrated intermediate medium vaporizer.

Background technique

China's economy is developing at a rapid pace, and the demand for energy is increasing rapidly. However, the excessive use of energy such as coal and oil has caused a huge burden on the environment. Natural gas, as a clean energy source, is favored in this context and has been widely developed and utilized.

At present, natural gas is usually stored and transported in the form of LNG, and the natural gas (NG) which raises the temperature of -163 ° C to 10 ° C to 25 ° C before the delivery to the user terminal is performed, and the vaporization process is generally carried out in the LNG vaporizer. . Since LNG contains 830-860 MJ/t of cold capacity, the use of high-grade cold energy to build a circulating power generation system is the main way to use LNG cooling capacity on a large scale, and to improve the economic benefits, energy saving, environmental protection, etc. of the LNG energy industry. The aspect has great practical significance.

At present, there are three types of vaporizers commonly used in global LNG receiving stations, such as open-frame vaporizers (ORV), submerged combustion vaporizers (SCV), intermediate heat transfer medium vaporizers (IFV), etc., among which there are many intermediate medium gasifiers. The preferred choice for the receiving station.

However, most of the most widely used integral intermediate vaporizers (IFVs) use seawater vaporized LNG. Although the vaporization efficiency is high and the structure is compact and stable, the ecological pollution to the ocean is minimized, and large-flow seawater is often used to make seawater The temperature difference of the outlet is very small, which requires the forced circulation of the pump, which consumes a lot of power. The most serious problem is that a large amount of LNG vaporization cold energy cannot be directly utilized. In order to utilize LNG vaporization cold energy, only the integrated intermediate medium vaporizer (IFV) can be divided into preheater, evaporator, condenser and thermostat to form a separate LNG cold energy power generation system, which not only further increases the system. Power consumption, and bring the problem of the required floor space and space. Although the problem of terrestrial receiving stations is not prominent, LNG cold energy power generation systems traditionally formed by split intermediate media vaporizers are difficult or even for LNG vaporization occasions such as ships and offshore FSRU platforms that have strict constraints on floor space and space. Not available.

Summary of the invention

The technical problem to be solved by the present invention is to provide a monolithic intermediate medium vaporizer with LNG cold energy utilization function, and a power generation system based on the above integrated intermediate medium vaporizer. The utility model not only solves the drawback that the traditional integral intermediate medium vaporizer can not utilize the LNG cold energy, but also replaces the condenser, the evaporator, the preheater and the adjustment of the traditional split type power generation system by the integral intermediate medium vaporizer with the LNG cold energy utilization function provided by the invention. Thermostats, etc., constitute an efficient and compact LNG cold energy power generation system, which solves the problem that the traditional split LNG cold energy utilization power generation system cannot be applied to the occasion where the space constraint is high.

In order to solve the above technical problem, the technical solution of the present invention is: an integrated intermediate medium vaporizer with LNG cold energy utilization function, which is innovative in that it comprises a casing having a heat exchange cavity in the casing, and the replacement The thermal cavity is divided into a front heat exchange zone of the vaporizer and a heat exchange zone at the rear of the vaporizer. The shell is also provided with an LNG heat exchange channel, an intermediate medium heat exchange channel, and a seawater heat exchange for separating the heat exchange cavity. a first partition and a second partition of the passage, and a middle partition separating the intermediate medium heat exchange passage into two sections is further connected between the first partition and the second partition, wherein the middle partition is located at the front of the vaporizer a boundary between the heat exchange zone and the heat exchange zone at the rear of the vaporizer, and the low pressure liquid intermediate medium outlet and the high pressure liquid intermediate medium inlet are respectively located at two sides of the middle partition, and the first partition and the second partition are respectively opened A plurality of through holes are inserted into the through holes, and the second separator is not open at the heat exchange area at the front of the vaporizer.

Further, the ratio of the front heat exchange zone of the vaporizer to the heat exchange zone at the rear of the vaporizer is 1:1 to 1:1.5.

Further, the through holes on the first spacer and the second spacer are distributed in a shape of a shape, and the through holes in the adjacent two columns are staggered.

Further, the heat pipe assembly includes a first heat pipe group located at a front heat exchange zone of the vaporizer and a second heat pipe group located at a heat exchange zone at a rear portion of the vaporizer, wherein the heat pipe in the first heat pipe group is inserted into the first baffle The through hole penetrates through the LNG heat exchange channel and the intermediate medium heat exchange channel, and the heat pipe in the second heat pipe group is sequentially inserted into the through hole on the first partition, the through hole in the second partition, and penetrates the LNG heat exchange passage, Intermediate medium heat exchange channel and seawater heat exchange channel.

Further, in the heat pipe in the first heat pipe group, the plurality of heat pipes in the second half of the front heat exchange zone of the vaporizer are disposed on the outer wall of the condensation section in the LNG heat exchange channel and are provided with annular fins, and the second heat pipe group All the heat pipes in the middle medium heat exchange channel are provided with annular fins on the outer wall of the condensation section, and the outer wall of the condensation section in the LNG heat exchange channel depends on the application environment temperature and the user's requirement for the final temperature of the NG output. Set ring fin

Further, in the heat pipe of the first heat pipe group, the working fluid in the heat pipe located in the first half of the LNG inlet adopts methane, and the working fluid in the heat pipe in the second half adopts ethane, and the heat pipe of the second heat pipe group The working medium in the medium uses propane.

Further, a temperature-regulating heat exchange coil is disposed at the heat exchange zone of the seawater heat exchange channel at the front heat exchange zone of the vaporizer, and the inlet and outlet of the NG temperature-regulating heat exchanger coil extend outside the shell of the integral intermediate medium vaporizer, and The inlet is connected to the NG outlet of the vaporizer LNG heat exchange passage.

A power generation system based on the above-mentioned integrated intermediate medium vaporizer, which is innovative in that it comprises an integral intermediate medium vaporizer having an LNG heat exchange passage, an intermediate medium heat exchange passage, and a seawater exchange in the integral intermediate medium vaporizer. The hot channel has a LNG inlet and an NG outlet connected to the LNG heat exchange passage on both sides of the integral intermediate medium vaporizer, a low pressure gaseous intermediate medium inlet connected to the intermediate medium heat exchange passage, and a high pressure gaseous intermediate medium outlet, and The seawater inlet and the seawater outlet connected to the seawater heat exchange passage have a low-pressure liquid intermediate medium outlet and a high-pressure liquid intermediate medium inlet connected to the intermediate medium heat exchange passage in the middle of the integral intermediate medium vaporizer, and are connected at the LNG inlet. There is a working pump A, a sea water pump is connected at the seawater inlet, and the working and circulation of the intermediate medium is realized by a turbine between the low-pressure gaseous intermediate medium inlet and the high-pressure gaseous intermediate medium outlet, and the low-pressure liquid intermediate medium outlet and the high-pressure liquid state Intermediate medium is realized between the intermediate medium inlets through a working fluid pump B Supercharged and circulated.

Further, the LNG inlet, the low-pressure gaseous intermediate medium inlet, and the seawater outlet are all located on the same side of the integrated intermediate medium vaporizer, and the NG outlet, the high-pressure gaseous intermediate medium outlet, and the seawater inlet are located on the other side of the integrated intermediate medium vaporizer.

The invention has the advantages that in the invention, the intermediate medium after the turbine power generation is condensed and liquefied by using a large amount of cold energy released during the vaporization of the LNG, and then pressurized into the vaporizer by the working medium pump to exchange heat with the seawater for heat absorption and vaporization. To achieve continuous cycle power generation, compared with the existing LNG vaporization cold energy Rankine cycle power generation system, not only overcomes the original integrated intermediate medium LNG vaporizer can not use LNG vaporization cold energy, resulting in energy waste and a large amount of low temperature seawater directly discharged into the sea. The disadvantages of the impact on the marine ecology, and the replacement of the original LNG cold energy by the original LNG cold energy using the preheater, evaporator, condenser and thermostat in the low temperature Rankine cycle constitutes the LNG cold energy power generation system, which can not only The cold energy released by the vaporization of LNG is utilized efficiently, and the compact footprint of the system is small compared with the conventional split-type cold energy power generation system with LNG vaporization.

In the present invention, three different heat pipe working fluids are used for the two heat pipe groups according to the working temperature, thereby ensuring that the two heat pipe groups work normally in the heat exchange process and the ice heat blocking channels do not appear ice blocking.

By adding annular fins to the outer wall of the heat pipe condensation section in the first heat pipe group and the second heat pipe group, the heat transfer of the gaseous working medium outside the heat pipe can be enhanced, the heat transfer heat resistance is effectively reduced, and the efficient operation of the entire system is ensured.

Through the NG temperature-regulating heat exchange coil, the NG from the outlet of the liquefier LNG channel NG can be exchanged with the seawater in the seawater heat exchange passage, so that the NG can further heat up to a set temperature to facilitate subsequent use. .

The LNG inlet, the low-pressure gaseous intermediate medium inlet, and the seawater outlet are all located on the same side of the monolithic intermediate medium vaporizer, and the NG outlet, the high-pressure gaseous intermediate medium outlet, and the seawater inlet are located on the other side of the integral intermediate medium vaporizer, thereby realizing The downstream flow of LNG and intermediate medium in the heat exchange channel, and the seawater and the intermediate medium flow in a countercurrent flow, thereby ensuring that the three media can sufficiently heat exchange and achieve a predetermined target.

DRAWINGS

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

1 is a schematic view of a monolithic intermediate medium vaporizer with LNG cold energy utilization function in the present invention.

2 is a schematic structural view of a monolithic intermediate medium vaporizer with LNG cold energy utilization function according to the present invention.

3 is a schematic view of a first separator in a monolithic intermediate medium vaporizer with LNG cold energy utilization function according to the present invention.

4 is a schematic view of a second separator in a monolithic intermediate medium vaporizer with LNG cold energy utilization function of the present invention.

Figure 5 is a schematic diagram of a cold energy power generation system based on a monolithic intermediate medium vaporizer with LNG cold energy utilization function in the present invention.

detailed description

The following examples are intended to provide a fuller understanding of the invention, and are not intended to limit the invention.

Example

The integrated intermediate medium vaporizer 1 with LNG cold energy utilization function of the present embodiment, as shown in FIGS. 1 and 2, includes a casing 2 which is designed as a semi-cylindrical rectangular shape for the inlet and outlet end faces of the working fluid on both sides. The assembly has a heat exchange cavity in the casing 2, and the heat exchange cavity is divided into a heat exchange zone at the front of the vaporizer and a heat exchange zone at the rear of the vaporizer, a heat exchange zone at the front of the vaporizer and a heat exchange zone at the rear of the vaporizer. The ratio is between 1:1 and 1:1.5, and the housing 2 is further provided with a LNG heat exchange passage 22, an intermediate medium heat exchange passage 23, and a seawater heat exchange passage 24 that divide the heat exchange cavity into a sequence. a partition plate 20 and a second partition plate 19, and the first partition plate 20, the second partition plate 19 and the casing 2 are fixed by welding, between the first partition plate 20 and the second partition plate 19 Also connected is a middle partition 17 which divides the intermediate medium heat exchange passage 23 into two sections, and the middle partition 17 is fixedly connected to the first partition 20 and the second partition 19 by welding, and the middle partition 17 is located The junction between the front heat exchange zone of the vaporizer and the heat exchange zone at the rear of the vaporizer.

On both sides of the casing of the integrated intermediate medium vaporizer 1, there are an LNG inlet 12, an NG outlet 4 communicating with the LNG heat exchange passage 22, a low-pressure gaseous intermediate medium inlet 11 communicating with the intermediate medium heat exchange passage 23, and a high-pressure gas state. The intermediate medium outlet 5, the seawater inlet 6 and the seawater outlet 10 communicating with the seawater heat exchange passage 24, and the low-pressure liquid medium communicating with the intermediate medium heat exchange passage 23 at the central portion of the casing 2 of the integrated intermediate medium vaporizer 1 The intermediate medium outlet 18, the high pressure liquid intermediate medium inlet 16, and the low pressure liquid intermediate medium outlet 18 and the high pressure liquid intermediate medium inlet 16 are respectively located on both sides of the intermediate partition 17.

The LNG inlet 12, the low-pressure gaseous intermediate medium inlet 11 and the seawater outlet 10 are all located on the same side of the casing 2 of the monolithic intermediate medium vaporizer 1, and the NG outlet 4, the high-pressure gaseous intermediate medium outlet 5, and the seawater inlet 6 are located in the integral intermediate medium vaporizer. The other side of the casing 2 of the first embodiment adopts such a design to realize the downstream flow of the LNG and the intermediate medium in the heat exchange passage, and the seawater and the intermediate medium flow in a countercurrent flow, thereby ensuring that the three mediums can sufficiently exchange heat and Achieve the intended goal.

In the integrated intermediate medium vaporizer with LNG cold energy utilization function in this embodiment, the specific structure of the first partition 20 is as shown in FIG. 3, and the specific structure of the second partition 19 is as shown in FIG. A plurality of through holes 21 are defined in the partition plate 20 and the second partition plate 19. The through holes 21 in the first partition plate 20 and the second partition plate 19 are arranged in a shape of a shape, and the through holes in the adjacent two columns are arranged. The staggered distribution, and the second partition 19 is not open at the front heat exchange zone of the vaporizer.

As shown in FIG. 1 and FIG. 2, a heat pipe assembly is inserted in the through hole 21, and the heat pipe assembly includes a first heat pipe group located at a heat exchange area at a front portion of the vaporizer and a second heat pipe group located at a heat exchange area at a rear portion of the vaporizer, wherein Each of the first heat pipes 15 constituting the first heat pipe group is inserted into the through hole 21 of the first separator 20 and penetrates the LNG heat exchange passage 22 and the intermediate medium heat exchange passage 23 to form a second heat pipe 3 in the second heat pipe group. The through holes 21 in the first partition plate 20 and the through holes 21 in the second partition plate 19 are sequentially inserted into the through holes 21 and penetrate the LNG heat exchange passage 22, the intermediate medium heat exchange passage 23 and the seawater heat exchange passage 24.

In the first heat pipe 15 in the first heat pipe group, the outer wall of the condensation section of the LNG heat exchange passage 22 near the second half of the front heat exchange zone of the vaporizer is provided with annular fins, and each of the second heat pipe groups The second heat pipe 3 is provided with annular fins on the outer wall of the condensation section of the intermediate medium heat exchange passage 23, and each second heat pipe 3 in the second heat pipe group is located on the outer wall of the condensation section of the LNG heat exchange passage 22, depending on the specific application. The ambient temperature and the user's requirements for the output NG temperature determine whether or not the annular fins are fitted. By adding annular fins to the outer wall of the heat pipe condensation section in the first heat pipe group and the second heat pipe group, the heat transfer of the gaseous working medium outside the heat pipe can be enhanced, the heat transfer heat resistance is effectively reduced, and the efficient operation of the entire system is ensured.

The heat pipe of the first heat pipe group has a large amount of released cold when the LNG is vaporized. As the temperature of the LNG changes, the working medium in the first heat pipe 15 located in the first half of the LNG inlet 12 adopts methane, and the second half in the second half. The working medium in one heat pipe 15 uses ethane, and the working medium in each second heat pipe 3 of the second heat pipe group uses propane. Different working fluids are used in each heat pipe to ensure that each heat pipe works normally during heat exchange and there is no ice blockage in each channel.

The present embodiment is based on the power generation system of the integral intermediate medium vaporizer, as shown in FIG. 5, comprising an integral intermediate medium vaporizer 1, a sea water pump 7, a working fluid pump 8, and a turbine 9, in the seawater of the integrated intermediate medium vaporizer 1. A sea water pump 7 is connected to the inlet 6 , and the intermediate medium is circulated through a turbine 9 between the low-pressure gaseous intermediate medium inlet 11 and the high-pressure gaseous intermediate medium outlet 5 , between the low-pressure liquid intermediate medium outlet 18 and the high-pressure liquid intermediate medium inlet 16 . The circulation of the intermediate medium is achieved by a working fluid pump 8.

A temperature-regulating heat exchange coil 14 is further disposed at the heat exchange passage of the seawater heat exchange passage 24 at the front heat exchange zone of the vaporizer, and the inlet and outlet of the temperature-regulating heat exchange coil 14 extend out of the casing 2 of the integral intermediate medium vaporizer 1 In addition, the inlet end of the temperature-regulating heat exchange coil 14 is connected to the NG outlet 4 through an NG temperature-regulating liquid inlet pipe 25, and the other end of the temperature-regulating heat-exchange coil 14 is connected to an NG temperature-regulating liquid outlet pipe. Through the cooperation between the temperature-regulating heat exchange coil 14, the NG temperature-adjusting liquid inlet pipe 25 and the NG outlet 4, the heat exchange between the NG outlet NG outlet 4 and the seawater in the seawater heat exchange passage can be heated to facilitate subsequent operation. usage of.

Working principle: In this embodiment, the intermediate medium is further illustrated by propane:

In the patent of the invention, the integral intermediate medium vaporizer 1 adopts a step vaporization technology, and the intermediate medium propane is used as an intermediate refrigerant, so as to avoid ice blockage caused by the low temperature of the cooling medium, and ensure that the three mediums can fully perform heat exchange, achieving -162 ° C The LNG endothermic reaches the set temperature NG state, and the flow direction of LNG and the two heat exchange mediums in the respective heat exchange chamber channels is required: propane and LNG are forward flow, sea water and LNG are reverse flow; and the first group of heat pipes According to the temperature range of LNG, the medium working medium adopts methane in the first half of the inlet, ethane in the second half, and propane in the second group.

Take a single level as an example:

LNG heat exchange process: LNG in the initial state (state parameter: 1.5 MPa, -162 ° C or so) flows from the LNG inlet 12 on the right side of the casing 2, and the LNG flows through the first heat pipe group 15 in the front heat exchange zone of the carburetor, Fully absorb the heat released by propane; change to the gas-liquid two-phase state in the middle part of the heat exchange zone in the front part of the vaporizer; change to the superheated NG state when it flows to the middle of the vaporizer; at this time, the NG passes through the rear heat exchange zone of the vaporizer The heat absorbed by the seawater again becomes a gaseous NG of 5 to 10 ° C; the gaseous NG flows into the temperature-regulating heat exchange coil 14 through the NG temperature-adjusting liquid inlet pipe 25, and further absorbs heat to reach 10 to 15 ° C, and finally heats up the NG. The NG temperature regulating liquid outlet pipe flows out for the user to use.

Propane heat exchange process: low temperature and low pressure gaseous propane flowing through the turbine 9 (status parameter: 0.11 MPa, about -40 ° C), flowing from the low pressure gaseous intermediate medium inlet 11 on the right side of the casing 2 into the first half of the intermediate medium heat exchange passage 23 In the integral intermediate medium vaporizer 1 vaporizer front heat exchange zone propane flows through the alternately arranged first heat pipe group, which acts as an intermediate heat medium to transfer heat absorbed from the seawater so that the LNG absorbs heat to a saturated NG state while absorbing from the LNG The amount of cold released is changed to a liquid state (state parameter: 0.1 MPa, -42 ° C) at the outlet of the low-pressure liquid intermediate medium at the front of the monolithic intermediate medium vaporizer 1 into the working fluid pump 8, after which the propane is passed through the working fluid pump. 8 The liquid state which becomes low temperature and high pressure after pressurization (status parameter: 0.73 MPa, about -42 °C) flows into the integral intermediate medium vaporizer 1 from the high pressure liquid intermediate medium inlet 16 of the heat exchange zone of the rear portion of the vaporizer of the monolithic intermediate medium vaporizer 1 In the intermediate medium heat exchange passage 23, only one set is set in the LNG heat exchange passage 22, the intermediate medium heat exchange passage 23 and the seawater heat exchange passage 24 in the rear heat exchange zone of the integrated intermediate medium vaporizer 1 vaporizer Through the second heat pipe 3, the heat in the seawater vaporizes the freshly flowing liquid propane into a superheated state through the second heat pipe 3, and at the same time, the saturated state NG absorbs heat to reach a superheat state, and the high temperature and high pressure gaseous propane (status parameter: 0.73) MPa, 15 ° C) from the high pressure gaseous intermediate medium outlet 5 on the left side of the casing 2, through the turbine 9 to work to drive the generator to generate electrical energy, at this time the turbo 9 expander can output mechanical work is 13330KJ / h, in During the whole heat exchange process, the real-time working condition can be adjusted by adjusting the flow rate of propane entering the intermediate medium heat exchange passage 23 and matching the LNG vaporization amount.

Seawater heat exchange process: seawater is pumped from the seawater inlet 6 into the seawater heat exchange channel 24 of the integrated intermediate medium vaporizer 1 by seawater pump 7. First, in the heat exchange zone behind the vaporizer, seawater is supplied to the intermediate medium for heat exchange. The high-pressure low-temperature liquid propane of the hot aisle 23 and the NG of the 22 in the LNG heat exchange passage cause the inflowing liquid propane to vaporize and the NG temperature rises to 5 to 10 ° C, and then flows through the temperature-regulating heat exchange coil 14 and exchanges with the temperature adjustment. The NG in the heat coil 14 exchanges heat, because the seawater in the channel is reversely flowing with LNG and propane, so at the evaporation end of the second group of heat pipes, the energy supplied by the seawater can satisfy the vaporization of the rear high pressure propane, and The heat absorption of the LNG was brought to a set state, and the seawater as an exothermic medium was lowered from 20 ° C to 14 to 15 ° C throughout the process.

The monolithic intermediate medium vaporizer 1 replaces the preheater, evaporator and condenser in the original low temperature Rankine cycle to form a low temperature Rankine cycle power generation system composed of the vaporizer, the liquid pump and the steam turbine, which not only overcomes the original whole The intermediate medium LNG vaporizer can not use LNG vaporization cold energy, resulting in waste of energy and a large amount of low-temperature seawater directly discharged into the sea, which causes the marine ecological impact. Moreover, this new integrated vaporizer replaces the original LNG cold energy utilization in the low temperature Rankine cycle. The preheater, the evaporator, the condenser and the thermostat constitute an LNG cold energy power generation system, which can not only efficiently utilize the cold energy released by the LNG vaporization, but also compares with the conventional split type cold energy power generation system with LNG vaporization. The system has a small footprint and a small footprint. It should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that the present invention is only described in the foregoing description and the description of the present invention, without departing from the spirit and scope of the invention. Various changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and their equivalents.

Claims

A monolithic intermediate medium vaporizer with LNG cold energy utilization function, comprising: a casing having a heat exchange cavity in the casing, the heat exchange cavity being divided into a front heat exchange zone of the vaporizer and a vaporizer a heat exchange zone, wherein the casing is further provided with a first partition and a second partition for separating the heat exchange cavity into a sequentially distributed LNG heat exchange passage, an intermediate medium heat exchange passage, and a seawater heat exchange passage. An intermediate partition separating the intermediate medium heat exchange passage into two sections is further connected between the partition plate and the second partition plate, and the middle partition plate is located at a boundary between the heat exchange zone at the front of the vaporizer and the heat exchange zone at the rear of the vaporizer. And the low-pressure liquid intermediate medium outlet and the high-pressure liquid intermediate medium inlet are respectively located at two sides of the middle partition, the first partition and the second partition are respectively provided with a plurality of through holes, and the heat pipe assembly is inserted into the through hole, and The second partition is not open at the heat exchange zone at the front of the vaporizer.
The integrated intermediate medium vaporizer with LNG cold energy utilization function according to claim 1, wherein the ratio of the front heat exchange zone of the vaporizer to the heat exchange zone of the rear of the vaporizer is 1:1 to 1:1.5.
The integrated intermediate medium vaporizer with LNG cold energy utilization function according to claim 1, wherein the through holes on the first partition plate and the second partition plate are arranged in a shape-shaped array, and adjacent to the two columns. The through holes are staggered.
The integrated intermediate medium vaporizer with LNG cold energy utilization function according to claim 1, wherein the heat pipe assembly comprises a first heat pipe group located at a front heat exchange zone of the vaporizer and a heat exchange zone located at a rear heat exchanger zone of the vaporizer. a second heat pipe group, wherein the heat pipe in the first heat pipe group is inserted into the through hole in the first partition plate and penetrates the LNG heat exchange channel and the intermediate medium heat exchange channel, and the heat pipes in the second heat pipe group are sequentially inserted into the first partition plate The through hole on the upper hole and the through hole in the second partition penetrate the LNG heat exchange passage, the intermediate medium heat exchange passage and the seawater heat exchange passage.
The integrated intermediate medium vaporizer with LNG cold energy utilization function according to claim 4, wherein in the heat pipe in the first heat pipe group, the plurality of heat pipes in the second half of the front heat exchange zone of the vaporizer are located in the LNG exchange The outer wall of the condensation section in the hot channel is provided with annular fins, and all the heat pipes in the second heat pipe group are provided with annular fins on the outer wall of the condensation section in the intermediate medium heat exchange passage, and are located in the LNG heat exchange passage. The outer wall of the condensation section depends on the application environment temperature and the user's requirements for the final temperature of the NG output to determine whether to fit the annular fin.
The integrated intermediate medium vaporizer with LNG cold energy utilization function according to claim 4, wherein in the heat pipe of the first heat pipe group, the working medium in the heat pipe located in the first half of the LNG inlet adopts methane The working medium in the heat pipe in the second half adopts ethane, and the working medium in the heat pipe of the second heat pipe group uses propane.
The integrated intermediate medium vaporizer with LNG cold energy utilization function according to claim 1, wherein a temperature regulating heat exchange coil is further disposed at a heat exchange zone of the seawater at the front heat exchange zone of the vaporizer, the NG tone The inlet and outlet of the warm heat exchange coil extend out of the outer casing of the integral intermediate medium vaporizer, and the inlet thereof is connected to the outlet NG outlet of the vaporizer LNG heat exchange passage.
A power generation system for a monolithic intermediate medium vaporizer according to claim 1, comprising: an integral intermediate medium vaporizer having an LNG heat exchange passage and an intermediate medium heat exchange passage in the integral intermediate medium vaporizer a seawater heat exchange passage, and at the same time, an LNG inlet and an NG outlet connected to the LNG heat exchange passage on both sides of the integral intermediate medium vaporizer, and a low pressure gaseous intermediate medium inlet connected to the intermediate medium heat exchange passage, and a high pressure gaseous intermediate The medium outlet, the seawater inlet and the seawater outlet connected to the seawater heat exchange passage, and the low-pressure liquid intermediate medium outlet and the high-pressure liquid intermediate medium inlet connected to the intermediate medium heat exchange passage in the middle of the integral intermediate medium vaporizer A working fluid pump A is connected to the LNG inlet, and a sea water pump is connected at the seawater inlet. The low-pressure gaseous intermediate medium inlet and the high-pressure gaseous intermediate medium outlet realize the work and circulation of the intermediate medium through a turbine, and the low-pressure liquid intermediate medium Between the outlet and the inlet of the high-pressure liquid intermediate medium, a working fluid pump B And pressurizing the intermediate flow medium.
The power generation system according to claim 8, wherein the LNG inlet, the low-pressure gaseous intermediate medium inlet, and the seawater outlet are all located on the same side of the integral intermediate medium vaporizer, and the NG outlet, the high-pressure gaseous intermediate medium outlet, and the seawater inlet are located. The other side of the monolithic intermediate medium vaporizer.