CN206071658U - A kind of LNG cold energy utilization system - Google Patents
A kind of LNG cold energy utilization system Download PDFInfo
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- CN206071658U CN206071658U CN201621026051.2U CN201621026051U CN206071658U CN 206071658 U CN206071658 U CN 206071658U CN 201621026051 U CN201621026051 U CN 201621026051U CN 206071658 U CN206071658 U CN 206071658U
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Abstract
This utility model is related to a kind of LNG cold energy utilization system, including compound Rankine cycle power generation sub-system, either simplex matter Rankine cycle power generation sub-system, ice making subsystem and direct expansion power generation sub-system, the compound Rankine cycle power generation sub-system includes LNG evaporator, mixed working fluid booster pump, heat exchanger, mixed working fluid vaporizer, mixed working fluid superheater, mixed working fluid decompressor, first either simplex matter booster pump, first either simplex matter vaporizer, first either simplex matter superheater and the first either simplex matter decompressor, the either simplex matter Rankine cycle power generation sub-system includes a NG superheaters, second either simplex matter booster pump, second either simplex matter vaporizer, second either simplex matter superheater and the second either simplex matter decompressor, the direct expansion power generation sub-system includes second, 3rd, 4th NG superheaters and NG decompressors.Cold of this utility model using 162 DEG C to 10 DEG C of LNG, realizes most fully comprehensively utilizing for LNG colds.
Description
Technical field
This utility model belongs to low temperature heat energy recycling field, is related to a kind of generating based on LNG cold energy uses and system
Ice system, more particularly to a kind of LNG cold energy utilization system.
Background technology
Liquefied natural gas（LNG）It is the natural gas for existing in liquid form at low temperature（NG）, its storage temperature about-
160 DEG C, storage convenient compared with NG and transport, but LNG generally needs to be vaporizated into again NG and could obtain extensively application, LNG
The cold energy discharged during vaporization is about 840kJ/kg, therefore the cold energy that LNG contains is very huge, reclaim this part cold energy have can
The economic and social benefit of sight, whereas if not recycling, this part cold energy is generally in LNG vaporization device by sea water or sky
Gas is taken away, and virtually causes huge waste, and in view of this, national development is just proposed early in 2005 with reform committee
The cold energy problem of complex utilization studied by LNG receiving stations.
The coal resource distribution of China is hided in off-lying provinces such as northwest, Shanxi and the Inner Mongol, not only exacerbates transport pressure,
Energy resource consumption and environmental contaminants total emission volumn are also increased, therefore, LNG generates electricity and can play change electric energy general layout, reduce ring
Border pollution, the effect for alleviating electric power peak-valley difference contradiction, and the successful case that LNG generates electricity abroad is a lot, it is maximum as LNG
Importer, Japan early in 1970 just southern Yokohama power plant 1, No. 2 350MW units realize LNG generating, by the end of 1996
Totally 23, the LNG power plant that Japan has run, use the unit 107 of LNG, and LNG has become the main of state's petroleum replacing
The energy.LNG generates electricity and is broadly divided into direct expansion method, Rankine cycle method, aerodynamic force circulation method, combustion gas-steaming according to principle difference
Vapour combined cycle method etc..
The cold of effectively utilizes LNG is wanted in Rankine cycle method, the selection of Rankine cycle working medium is particularly significant, Rankine cycle work
Matter is usually the one-components such as methane, ethane, either simplex matter, or adopts organic mixed working fluid, as LNG is multi-component mixing
Thing, its boiling spread are wide, can make the vaporization curve of LNG and the freezing curve of working medium using rational mixed working fluid component
It is consistent as far as possible, so as to improve the thermal efficiency of LNG vaporization device.
LNG cold energy is except can be used to generate electricity, it may also be used for air separation, lighter hydrocarbons recovery, low-temperature grinding, desalinization, cold
The fields such as jelly, dry ice manufacture.With the continuous maturation of cold energy use technology, various cold energy use schemes have been suggested
And implement, such as generating of direct expansion method, low temperature Rankine cycle method, direct expansion method+space division, step Rankine method, Rankine cycle
+ direct expansion method, compound Rankine cycle method etc., the Chinese patent of wherein Publication No. CN103968640A disclose a kind of profit
With the air-seperation system of natural gas pressure difference generating cold energy, the system adopts direct expansion method+space division, using the pressure of natural gas
Power fire is with making decompressor generate electricity, and the cold energy gone out after decompressor is used for space division；The China of Publication No. CN103075250A is specially
Profit discloses a kind of method that cascade utilization cold energy of liquefied natural gas generates electricity, and follows Rankine using the Cryogenic exergy of liquefied natural gas
Decompressor in ring generates electricity, and NG sections part cold energy is supplied to flue gas, after making flue gas cool-down, generates electricity into decompressor, cooling,
Continue absorption LNG colds after blood pressure lowering and realize Rankine cycle, the method adopts two single Rankine cycles, at least need two to add
Hot device and two coolers；The Chinese patent of Publication No. 104373165A discloses a kind of using cold energy of liquefied natural gas generating
System, the system devises the Rankine cycle of two media with natural gas, coolant as working medium, step by step using LNG cold energy；It is open
Number a kind of afterheat generating system of utilization organic Rankine bottoming cycle is disclosed for the Chinese patent application of 103953405A, system profit
Generated electricity with waste heat of the temperature less than 200 DEG C；The Chinese patent of Publication No. 104018901A discloses a kind of natural pressure
Energy cold energy combined generating system, the system adopts direct expansion method+air or sea water carries out joint for the Rankine cycle of thermal source
Electricity.
As from the foregoing, although the cold energy use scheme of liquefied natural gas is a lot, but currently existing scheme can typically have profit
The problems such as using inefficient so that cold energy can not obtain sufficiently effective utilization, still has many cold energy to be wasted.
Jing retrievals find that the Chinese patent of Publication No. CN101806293A discloses a kind of raising cold energy of liquefied natural gas
The integrated optimization method of generating efficiency, LNG from Rankine cycle electricity generation system enter direct expansion electricity generation system, its temperature for-
43 DEG C, then directly by heating of seawater, cold is wasted.The method also includes ice water system：By the frozen water backwater after cooling by ice
Tank Jing pumps are delivered in the building in liquefied natural gas receiving station region, and cooler does hot friendship between air-conditioning and compressor machine
Change, after heat exchange, frozen water return water temperature is raised, and is then return in coolant/frozen water heat exchanger, is exchanged heat with high pressure refrigerant working medium,
Frozen water backwater after cooling returns again to return flume.Cold so needed for ice making is provided by the working medium in Rankine cycle completely,
After the ice making market demand reduces, ice-make cycle will stop, and cause the Rankine cycle can not normal work.Rankine cycle is mixed
The single cycle of working medium is closed, it is low by 10～20% compared with the generating efficiency of the compound either simplex matter Rankine cycle of mixed working fluid Rankine cycle.Publication number
Chinese patent for 104989473A provides a kind of electricity generation system and the electricity-generating method based on the system, the method merely with
The cold energy of LNG-162～-51 DEG C and pressure energy that may be present, more than -51 DEG C of cold energy cannot due to the restriction of ocean temperature
Using being taken away by sea water, while the pressure and temp that the 9th logistics is mentioned in the method all changes with the difference of ocean temperature, so
And existing decompressor has a strict demand to pressure medium, pressure does not stop fluctuation,（0.5～2MPa）Decompressor cannot be made
It is steady in a long-term to run, therefore the method does not consider the ability to bear of decompressor under different operating modes；In addition in description 0030-
0032 section mention " seawater heat exchanger 3 outlet NG temperature be 28 DEG C（Third―party logistics III）（With seasonal variations, ocean temperature is not
Together）, pressure be pressurized to 1.0MPa for 10MPa ... Jing propane working medium pump 10（12nd logistics Ⅻ）, booster pump wasted work 40.32kW,
28 DEG C of steam is evaporated to into the heat exchange of seawater vaporizer 11 ", mention in description 0037-0039 sections that " seawater heat exchanger 3 goes out
The NG temperature of mouth is 5 DEG C（Third―party logistics III）（With seasonal variations, ocean temperature is different）, pressure be 10MPa ... Jing propane working medium
Pump 10 is pressurized to 0.49MPa（12nd logistics Ⅻ）, booster pump wasted work 21.75kW, into seawater vaporizer 11 heat exchange be evaporated to 5
DEG C steam " it follows that pressure differential change greatly, decompressor can not realize do work.
Utility model content
In order to overcome the defect of existing prior art presence, the utility model proposes a kind of LNG cold energy utilization system,
The system includes direct expansion generating, ice making and compound Rankine 3 subsystems of generating, is fully improving LNG cooling capacity utilization rates
Simultaneously, moreover it is possible to ensure the stable operation of LNG vaporization function, do not disturbed by ice making, generating function, while being followed by adjusting Rankine
In ring, the setting of partial parameters is realizing that pressure value does not change with the change of ocean temperature in system, causes into decompressor
Working medium constant pressure, and then ensure the work of decompressor normal table.
The technical scheme in the invention for solving the technical problem is：
A kind of LNG cold energy utilization system, including compound Rankine cycle power generation sub-system, either simplex matter Rankine cycle generating
Subsystem, ice making subsystem and direct expansion power generation sub-system, compound Rankine cycle power generation sub-system include LNG evaporator, mix
Working medium booster pump is closed, heat exchanger, mixed working fluid vaporizer, mixed working fluid superheater, mixed working fluid decompressor, the first either simplex matter increase
Press pump, the first either simplex matter vaporizer, the first either simplex matter superheater and the first either simplex matter decompressor, LNG evaporator include first shell
Body and the first heat exchanger tube being arranged in first shell body, the first housing have LNG imports and NG outlets, LNG imports and LNG
Storage tank is connected, and there is first heat exchanger tube the first mixed working fluid entrance and the first mixed working fluid to export, the first mixed working fluid
Entrance Jing pipelines are connected with mixed working fluid decompressor, and the first mixed working fluid outlet Jing pipelines are connected with mixed working fluid booster pump；Change
Hot device includes the second housing and the second heat exchanger tube being arranged in second shell body, the second housing have the second mixed working fluid entrance and
Second mixed working fluid is exported, and the second mixed working fluid entrance Jing pipelines are connected with mixed working fluid booster pump, and the second heat exchanger tube is with the
One single working medium entrances and first single sender property outlet, first single working medium entrances Jing pipeline are connected with the first either simplex matter decompressor, and first
Single sender property outlet Jing pipelines are connected with the first either simplex matter booster pump, and the first either simplex matter booster pump sequentially passes through the evaporation of the first either simplex matter
Device, the first either simplex matter superheater are connected with the first either simplex matter decompressor；Mixed working fluid vaporizer includes the 3rd housing and is arranged in
There is the 3rd mixed working fluid entrance and the 3rd mixed working fluid to export for the 3rd heat exchanger tube in 3rd housing, the 3rd housing, and the 3rd mixes
Close working medium entrances Jing pipeline and the second mixed working fluid outlet, the 3rd mixed working fluid outlet Jing pipelines and mixed working fluid superheater
Connection, mixed working fluid superheater are connected with mixed working fluid decompressor；
Either simplex matter Rankine cycle power generation sub-system includes a NG superheaters, the second either simplex matter booster pump, the second either simplex matter
Vaporizer, the second either simplex matter superheater and the second either simplex matter decompressor, a NG superheaters include the 4th housing and are arranged in the
There is a NG imports and the 2nd NG to export for the 4th heat exchanger tube in four housings, the 4th housing, a NG import Jing pipelines and the
One NG outlets, the 4th heat exchanger tube is with second single working medium entrances and second single sender property outlet, second single working medium entrances Jing pipe
Road is connected with the second either simplex matter decompressor, and second single sender property outlet Jing pipelines are connected with the second either simplex matter booster pump, the second either simplex
Matter booster pump is sequentially passed through the second either simplex matter vaporizer, the second either simplex matter superheater and is connected with the second either simplex matter decompressor；
Direct expansion power generation sub-system includes the 2nd NG superheaters, the 3rd NG superheaters, and NG decompressors and the 4th NG are overheated
Device, the 2nd NG superheaters include the 5th housing and the 5th heat exchanger tube being arranged in the 5th housing, and the 5th housing has the 2nd NG
Import and the 3rd NG outlets, the 2nd NG imports and the 2nd NG outlets, the 3rd NG outlet Jing pipelines and the 3rd NG superheaters
Connection, the 3rd NG superheaters are connected with NG decompressors, the 4th NG superheaters successively, the 4th NG superheaters connection gas distributing system；
Ice making subsystem includes ice making unit, and ice making unit has refrigerant inlet and refrigerant outlet, ice making unit
It is overheated that refrigerant outlet connects mixed working fluid vaporizer, the first either simplex matter vaporizer, the second either simplex matter vaporizer, the 2nd NG respectively
The refrigerant inlet of device, the refrigerant inlet of ice making unit connect respectively mixed working fluid vaporizer, the first either simplex matter vaporizer,
Two either simplex matter vaporizers, the refrigerant outlet of the 2nd NG superheaters.
This utility model adopts the temperature of ice making unit output for the part of -15 DEG C of refrigerant suction LNG cold energy generations
Cold and the part cold of the overheated releases of NG, and the cold energy for absorbing is used for into ice making subsystem so that system of the present utility model
- 162 DEG C to -10 DEG C of LNG gasification release of cold is made full use of, the only few part of cold of LNG gasification release is by sea water
Take away, major part is used for ice making, generates electricity, realizing does not increase the most fully comprehensive of LNG colds in the case of technological process difficulty
Close and utilize, simultaneously because sea water thermal source in system of the present utility model, is remained, in the mixed working fluid vaporizer of refrigerant heat
The mixed working fluid superheater of heating of seawater is set afterwards, heating of seawater is set after the first either simplex matter vaporizer of refrigerant heat
First either simplex matter superheater, the second either simplex matter that heating of seawater is arranged after the second either simplex matter vaporizer of refrigerant heat are overheated
Device, and after the 2nd NG superheaters of refrigerant heat arrange heating of seawater the 3rd NG superheaters, when do not need ice making work(
During energy, can be by increasing into mixed working fluid superheater, the first either simplex matter superheater, the second either simplex matter superheater and the 3rd NG
The seawater flow of superheater is unaffected come the generating and gasification function for ensureing the system.In addition, ice making of the present utility model
The more traditional ice making technique of system saves refrigeration unit, greatly reduces ice making cost.
Preferably, mixed working fluid superheater, the first either simplex matter superheater, the second either simplex matter superheater, the 3rd NG superheaters,
4th NG superheaters are exchanged heat as heating agent using sea water.
It is further preferred that mixed working fluid superheater, the first either simplex matter superheater, the second either simplex matter superheater, the 3rd NG
Seawater flow control valve is set on superheater, the 4th NG superheaters so that sea water enters mixed working fluid superheater, the first either simplex matter
Superheater, the second either simplex matter superheater, the 3rd NG superheaters, the 4th NG superheaters flow it is controllable according to actual needs.
Still further preferably, mixed working fluid decompressor, the first either simplex matter decompressor, the second either simplex matter decompressor, NG are swollen
Swollen machine connects electromotor respectively.
It is further preferred that the first by-pass reducing valve is installed between the import of mixed working fluid decompressor and outlet, the
Second by-pass reducing valve is installed between the import of one either simplex matter decompressor and outlet, the import of the second either simplex matter decompressor with go out
The 3rd by-pass reducing valve is installed between mouthful.
So, bypass is set on the decompressor pipeline of Rankine cycle, the vapour of decompressor generating influence system can be avoided
Change function, it is ensured that the independence of vaporization function, open when decompressor needs maintenance or does not need generating function and bypass and adjust
Working medium flow in whole rankine cycle makes rankine cycle run well, LNG evaporator and a NG superheater normal works, LNG
Vaporization function is unaffected.
The utility model has the advantages that：
1. this utility model is by the compound Rankine cycle generating set of organic low temperature, either simplex matter rankine cycle generating set, straight
In connecing expansion power generation unit and ice-making system composition, and compound Rankine cycle, heat exchanger can not only be used for mixed working fluid Rankine cycle
Heater, but also as the condenser of single working medium circulation, reduce equipment investment, while so that the flow process of compound Rankine cycle
Control is more convenient, and the part cold of LNG cold energy generations and NG excessively heat release part cold passes through heat transmission equipment by -15 DEG C of gas
Ice-making system is taken away and be used for phase R cold-producing medium, the cold for making this utility model take full advantage of LNG-162 DEG C to -10 DEG C, only
Few part cold is taken away by sea water, and the most abundant of LNG colds is realized in the case where technological process complexity is not increased
Comprehensive utilization；
2. this utility model can also enter while which is gasified using -160 DEG C of liquefied natural gas as medium
Row generates electricity, and generating efficiency is high, not only solves that NG is overheated and the heat source of Rankine cycle working medium, also realizes making by cold-producing medium
Ice function, saves the investment of the refrigeration unit in ice making technique, realizes the combination of LNG cold energy generations and cold energy ice making；
3. this utility model still retains sea water as thermal source, arranges by sea water after the vaporizer of each refrigerant heat
By adjusting seawater flow, the superheater of heating, so ensure that system is normally run；
4. as ocean temperature can be continually changing with the change in season, and the amount of vaporization of LNG also can be according to yard feelings
There is fluctuation in condition, and in this utility model setting Rankine cycle, partial parameters are constant to ensure pressure, and then ensure that decompressor is normal
Steady operation.
Description of the drawings
System and workflow diagram of the Fig. 1 for this utility model embodiment one.
System and workflow diagram of the Fig. 2 for this utility model embodiment two.
In figure：1.LNG vaporizers, 2. mixed working fluid booster pump, 3. heat exchanger, 4. mixed working fluid vaporizer, 5. mixes work
Matter superheater, 6. mixed working fluid decompressor, 7. the first either simplex matter booster pump, 8. the first either simplex matter vaporizer, 9. the first either simplex matter
Superheater, 10. the first either simplex matter decompressor, 11. the oneth NG superheaters, 12. second either simplex matter booster pumps, 13. second either simplex matter
Vaporizer, 14. second either simplex matter superheaters, 15. second either simplex matter decompressors, 16. the 2nd NG superheaters, 17. the 3rd NG are overheated
Device, 18.NG decompressors, 19. the 4th NG superheaters, 20. first by-pass reducing valves, 21. second by-pass reducing valves, by the of 22. the 3rd
Road air relief valve, 23. ice making units.
Following numbering is made in related logistics：LNG is high-pressure liquefaction natural gas, and NG is meet gas distributing system requirement natural
Gas, SW are sea water, and cold-producing medium is labeled as R, and wherein Ri is the vapor phase refrigerant of ice making unit output, and Ro is that heat exchange is condensed
Liquid refrigerant, 101 is to take away liquid-phase mixing working medium after the condensation of low temperature LNG colds, after 102 are the supercharging of mixed working fluid booster pump
Liquid-phase mixing working medium, 103 be by the first either simplex matter heat high-pressure liquid phase mixed working fluid, 104 is by the height of refrigerant heat
Pressure mixed working fluid, 105 is by the gas-phase high pressure mixed working fluid of heating of seawater, after 106 for mixed working medium decompressor blood pressure lowering cooling
Low pressure mixed working fluid, 201 for be mixed working medium condensation liquid phase the first either simplex matter, 202 be the first either simplex matter booster pump supercharging
Liquid phase the first either simplex matter afterwards, 203 is that 204 is by the high pressure gas of heating of seawater by high pressure the first either simplex matter of refrigerant heat
Phase the first either simplex matter, 205 is low pressure the first either simplex matter after being lowered the temperature by the first either simplex matter decompressor blood pressure lowering, and 301 is by high pressure day
Low-pressure liquid the second either simplex matter that so air cooling is coagulated, 302 is high-pressure liquid phase the second either simplex matter after the supercharging of the second either simplex matter booster pump,
303 be by high pressure the second either simplex matter of refrigerant heat, 304 be by high pressure vapor the second either simplex matter of heating of seawater, 305 be by
Low pressure the second either simplex matter after second either simplex matter decompressor blood pressure lowering cooling, 401 to be mixed the high-pressure natural gas of working medium heating,
402 is the high-pressure natural gas heated by the second either simplex of low pressure matter, and 403 is that, by the high-pressure natural gas of refrigerant heat, 404 is extra large
The high-pressure natural gas of water heating, 405 is that, by the natural gas after NG decompressors blood pressure lowering cooling, 105A is further separated into mixed working fluid for Jing
The gas-phase high pressure mixed working fluid of decompressor, 105B are further separated into the gas-phase high pressure mixed working fluid of the first by-pass reducing valve for Jing,
204A is further separated into high pressure vapor the first either simplex matter of the first either simplex matter decompressor for Jing, and 204B is further separated into the second bypass for Jing
High pressure vapor the first either simplex matter of air relief valve, 304A are further separated into second either simplex of high pressure vapor of the second either simplex matter decompressor for Jing
Matter, 304B are further separated into high pressure vapor the second either simplex matter of the 3rd by-pass reducing valve for Jing.
Specific embodiment
Embodiment one
The cold energy of liquefied natural gas utilization system of the present embodiment, as shown in figure 1, generating electricity sub including compound Rankine cycle
System A, either simplex matter Rankine cycle power generation sub-system B, direct expansion power generation sub-system C and ice making subsystem D, wherein compound Rankine
Circulating generation subsystem A includes LNG evaporator 1, and mixed working fluid booster pump 2, heat exchanger 3, mixed working fluid vaporizer 4 mix work
Matter superheater 5, mixed working fluid decompressor 6, the first either simplex matter booster pump 7, the first either simplex matter vaporizer 8, the first either simplex matter are overheated
Device 9 and the first either simplex matter decompressor 10, mixed working fluid decompressor 6 and the first either simplex matter decompressor 10 connect electromotor respectively.LNG
Vaporizer 1 includes the first housing and the first heat exchanger tube being arranged in first shell body, and the first housing has LNG imports and a NG
Outlet, LNG imports are connected with LNG storage tank, and there is the first heat exchanger tube the first mixed working fluid entrance and the first mixed working fluid to export,
First mixed working fluid entrance Jing pipelines are connected with mixed working fluid decompressor 6, and the first mixed working fluid exports Jing pipelines and mixed working fluid
Booster pump 2 is connected；Heat exchanger 3 includes the second housing and the second heat exchanger tube being arranged in second shell body, and the second housing has the
Two mixed working fluid entrances and the outlet of the second mixed working fluid, the second mixed working fluid entrance Jing pipelines are connected with mixed working fluid booster pump 2,
Second heat exchanger tube is with first single working medium entrances and first single sender property outlet, first single working medium entrances Jing pipeline and the first either simplex matter
Decompressor 10 is connected, and first single sender property outlet Jing pipelines are connected with the first either simplex matter booster pump 7, and the first either simplex matter booster pump is successively
It is connected with the first either simplex matter decompressor 10 through the first either simplex matter vaporizer 8, the first either simplex matter superheater 9；Mixed working fluid evaporates
Device 4 includes the 3rd housing and the 3rd heat exchanger tube being arranged in the 3rd housing, and there is the 3rd heat exchanger tube the first import and first to go out
Mouthful, there is the 3rd housing the 3rd mixed working fluid entrance and the 3rd mixed working fluid to export, the 3rd mixed working fluid entrance Jing pipelines with change
Second mixed working fluid outlet of hot device 4, the 3rd mixed working fluid outlet Jing pipelines are connected with mixed working fluid superheater 5, are mixed
Working medium superheater 5 is connected with mixed working fluid decompressor 6.
Either simplex matter Rankine cycle power generation sub-system B includes a NG superheaters 11, the second either simplex matter booster pump 12, the second list
Working medium vaporizer 13, the second either simplex matter superheater 14 and the second either simplex matter decompressor 15, the connection of the second either simplex matter decompressor 15 are sent out
Motor, a NG superheaters 11 include the 4th housing and the 4th heat exchanger tube being arranged in the 4th housing, and the 4th housing has the
One NG imports and a NG outlets of the 2nd NG outlets, a NG import Jing pipelines and LNG evaporator 1, the 4th heat exchanger tube
With second single working medium entrances and second single sender property outlet, second single working medium entrances Jing pipeline is connected with the second either simplex matter decompressor 15
Logical, second single sender property outlet Jing pipelines are connected with the second either simplex matter booster pump 12, and the second either simplex matter booster pump 12 sequentially passes through the
Two either simplex matter vaporizers 13, the second either simplex matter superheater 14 are connected with the second either simplex matter decompressor 15.
Direct expansion power generation sub-system C includes the 2nd NG superheaters 16, the 3rd NG superheaters 17, NG decompressors 18 and the 4th
NG superheaters 19, the connection electromotor of NG decompressors 18, the 2nd NG superheaters 16 include the 5th housing and are arranged in the 5th housing
The 5th heat exchanger tube, the 5th heat exchanger tube has the second import and second outlet, and the 5th housing has the 2nd NG imports and the 3rd NG
2nd NG outlets of outlet, the 2nd NG imports and a NG superheaters 11, the 3rd NG outlet Jing pipelines and the 3rd NG mistakes
Hot device 17 is connected, and the 3rd NG superheaters 17 are connected with NG decompressors 18, the 4th NG superheaters 19 successively, and the 4th NG superheaters 19 connect
Connect gas distributing system.
In addition, the first either simplex matter vaporizer 8 includes the 6th housing and the 6th heat exchanger tube being arranged in the 6th housing, the 6th
Heat exchanger tube has triple feed inlet and the 3rd outlet, the 6th housing with the 3rd single working medium entrances and the 3rd single sender property outlet, the 3rd
Single working medium entrances connect the first either simplex matter booster pump 7, and the 3rd single sender property outlet connects the first either simplex matter superheater 9；Second either simplex
Matter vaporizer 13 includes the 7th housing and the 7th heat exchanger tube being arranged in the 7th housing, the 7th heat exchanger tube have the 4th import and
4th outlet, with the 4th single working medium entrances and the 4th single sender property outlet, the 4th single working medium entrances connection second is single for the 7th housing
Working medium booster pump 12, the 4th single sender property outlet connect the second either simplex matter superheater 14.Ice making subsystem D includes ice making unit 23,
The refrigerant outlet that ice making unit 23 has refrigerant inlet and refrigerant outlet, ice making unit 23 connects mixed working fluid steaming respectively
Send out the first import of device 4, the triple feed inlet of the first either simplex matter vaporizer 8, the 4th import of the second either simplex matter vaporizer 13, second
Second import of NG superheaters 16, the refrigerant inlet of ice making unit 23 connect respectively the first outlet of mixed working fluid vaporizer 4,
First either simplex matter vaporizer 8 the 3rd outlet, the second either simplex matter vaporizer 13 the 4th outlet, the second of the 2nd NG superheaters 16
Outlet.
In addition, mixed working fluid superheater 5, the first either simplex matter superheater 9, the second either simplex matter superheater 14, the 3rd NG are overheated
Device 17, the 4th NG superheaters 19 are exchanged heat as heating agent using sea water, and mixed working fluid superheater 5, the first either simplex matter are overheated
Seawater flow control valve is set on device 9, the second either simplex matter superheater 14, the 3rd NG superheaters 17, the 4th NG superheaters 19 so that
Seawater flow can be adjusted according to actual needs.Wherein mixed working fluid is ternary mix working medium, by methane, ethylene and propane group
Into first, second either simplex matter is propane.Vapor phase refrigerant of the cold-producing medium of the output of ice making unit 23 for -15 DEG C of temperature（Cold-producing medium
Model R22 or R404A）.
As ocean temperature can be continually changing with the change in season, and LNG gasification amount also occurs according to yard situation
Fluctuation, therefore in system process MaterialBalance Computation, using ocean temperature and LNG gasification amount as independent variable, rationally set first
Determine the constant pressure value that cycle fluid is pressurized by working medium pump, then set up the restriction relation of various parameters variable, calculate working medium
The dependent variable such as flow, temperature.Therefore, set cycle fluid and guarantee expansion is to ensure that by the constant pressure value that working medium pump is pressurized
The normal operation of machine, and can be closed by setting up the constraint of various parameters variable on the premise of stable operation in guarantee decompressor
System realizes the maximum generating watt of system.
The liquefied natural gas parameter of certain liquefied natural gas receiving station is as follows：Flow is 150t/h, and temperature is -160 DEG C, pressure
For 10MPa, its component（mol%）For 99%CH4, 1%C2H6.Ocean temperature is 7 DEG C～30 DEG C.The networking of natural gas requires as follows：
Flow is 150t/h, and temperature is 0 DEG C, and pressure is 8.7MPa, its component（mol%）For 99%CH4, 1%C2H6。
Liquefied natural gas comprehensive utilization process includes that mixed working fluid Rankine cycle generates electricity, the first either simplex matter Rankine cycle is sent out
Electricity, the generating of the second either simplex matter rankine cycle, ice making and high-pressure natural gas direct expansion 4 each several parts of generating, which comprises the following steps that：
(1) mixed working fluid Rankine cycle generates electricity：Mixed working fluid flow changes with ocean temperature, by adjusting mixed working fluid
Flow ensureing the energy balance of heat exchanger 3, by the low pressure mixed working fluid 106 from mixed working fluid decompressor 6 with LNG in LNG
Heat exchange is carried out in vaporizer 1, the low pressure mixed working fluid after heat exchange is condensed into the liquid-phase mixing working medium that temperature is -140 DEG C
101, liquid-phase mixing working medium 101 is pressurized to after 1.56Mpa into mixed working fluid booster pump 2 becomes high-pressure liquid phase mixed working fluid 102,
Wherein 2 output pressure of mixed working fluid booster pump is set to steady state value 1.56Mpa, and the pressure does not change with ocean temperature, it is ensured that mixing
Working medium decompressor 6 is normal to be run, while mixed working fluid booster pump 2 adjusts the flow of mixed working fluid according to ocean temperature, it is ensured that bright
Willing circulating generation amount is maximum, and high-pressure liquid phase mixed working fluid 102 enters heat exchanger 3, with low pressure the first either simplex matter in heat exchanger 3
205 carry out heat exchange, and the high-pressure liquid phase mixed working fluid 102 after heat exchange is warming up to -28 DEG C becomes high-pressure liquid phase mixed working fluid
103, high-pressure liquid phase mixed working fluid 103 is become high pressure mixing working medium to -10 DEG C by refrigerant heat into mixed working fluid vaporizer 4
104, high pressure mixing working medium 104 enters back into mixed working fluid superheater 5 is become high pressure vapor mixing to 5.5～28 DEG C by heating of seawater
Working medium 105, high pressure vapor mixed working fluid 105 enter mixed working fluid decompressor with the high-pressure gaseous state of 5.5～28 DEG C, 1.5Mpa
6, mixed working fluid decompressor 6 drives electromotor to do manual work and generates electricity so that mixed working fluid becomes Jing after decrease temperature and pressure for about -50 DEG C,
The low pressure mixed working fluid 106 of 0.13Mpa, low pressure mixed working fluid 106 continue to carry out heat exchange with LNG into LNG evaporator 1, and
It is again introduced into mixed working fluid booster pump 2 and lifts circulating pressure.
(2) the first either simplex matter Rankine cycle generates electricity：The first single working medium flow changes with ocean temperature and mixed working fluid flow
Change and change, the energy balance of heat exchanger 3, the first either simplex of low pressure matter 205 are ensured by the flow of the first either simplex matter of adjustment
Working medium is mixed in heat exchanger 3 and is liquefied as the first either simplex matter 201 of liquid phase that temperature is -39 DEG C, the first either simplex of liquid phase matter 201 is entered
Entering the first either simplex matter booster pump 7 and being pressurized to 0.55Mpa becomes the first either simplex of high-pressure liquid phase matter 202, wherein the supercharging of the first either simplex matter
7 pressure of pump is set to steady state value 0.55Mpa, and the pressure does not change with ocean temperature, it is ensured that 10 normal fortune of the first either simplex matter decompressor
OK, while the first either simplex matter booster pump 7 adjusts the flow of the first either simplex matter according to ocean temperature, it is ensured that Rankine cycle generated energy is most
Greatly, the first either simplex of high-pressure liquid phase matter 202 is become high pressure the to -10 DEG C DEG C by refrigerant heat into the first either simplex matter vaporizer 8
One either simplex matter 203, the first either simplex of high pressure matter 203 are become to 5.5～28 DEG C by heating of seawater in the first either simplex matter superheater 9
The first either simplex of high pressure vapor matter 204, high pressure vapor either simplex matter 204 enter the first either simplex matter decompressor 10, and expansion work generates electricity, makes
Obtain the first either simplex of low pressure matter 205 that the first either simplex matter blood pressure lowering cooling becomes -23 DEG C of temperature, 0.13Mpa, low pressure the first either simplex matter
205 continue to carry out heat exchange with mixed working fluid into heat exchanger 3, and are again introduced into the lifting circulation pressure of the first either simplex matter booster pump 7
Power.
(3) the second either simplex matter Rankine cycle generates electricity：The second single working medium flow changes with ocean temperature and mixed working fluid flow
Change and change, the energy balance of a NG superheaters 11 is ensured by the flow of the second either simplex matter of adjustment, low LNG is in LNG
High-pressure natural gas 401 are flashed to by low pressure mixed working fluid 106 in vaporizer 1, high-pressure natural gas 401 enter a NG superheaters 11
Exchange heat with the second either simplex of low pressure matter 305, the second either simplex of low pressure matter 305 is condensed into into the second either simplex of liquid matter 301, low-pressure liquid
Two either simplex matter 301 enter the second either simplex matter booster pump 12, and being pressurized to 0.55Mpa becomes the second either simplex of high-pressure liquid phase matter 302, wherein
Second either simplex matter booster pump, 12 pressure is set to steady state value 0.55Mpa, and the pressure does not change with ocean temperature, it is ensured that the second either simplex matter
Decompressor 15 is normal to be run, while the second either simplex matter booster pump 12 adjusts the flow of the second either simplex matter according to ocean temperature, it is ensured that
Rankine cycle Energy Maximization, the second either simplex of high-pressure liquid phase matter 302 enter the second either simplex matter vaporizer 13 by refrigerant heat to-
10 DEG C become the second either simplex of high pressure matter 303, the second either simplex of high pressure matter 303 into the second either simplex matter superheater 14 by heating of seawater extremely
5.5～28 DEG C become the second either simplex of high pressure vapor matter 304, and the second either simplex of high pressure vapor matter 304 enters the second either simplex matter decompressor
15, expansion work generates electricity so that the second either simplex matter blood pressure lowering cooling becomes low pressure the second either simplex matter of -39 DEG C of temperature, 0.13Mpa
305, the second either simplex of low pressure matter 305 continues to carry out heat exchange with high-pressure natural gas 401 into a NG superheaters 11, and enters again
Enter the second either simplex matter booster pump 12 and lift circulating pressure.
(4) direct expansion generates electricity：High-pressure natural gas 401 are heated by the second either simplex of low pressure matter 305 in a NG superheaters 11
After become high-pressure natural gas 402, high-pressure natural gas 402 are become temperature -25 DEG C by refrigerant heat into the 2nd NG superheaters 16
High-pressure natural gas 403, high-pressure natural gas 403 become high-pressure natural gas 404 by heating of seawater into the 3rd NG superheaters 17, high
Pressure natural gas 404 enters NG decompressors 18, and expansion work generates electricity so that high-pressure natural gas decrease temperature and pressure becomes natural gas 405, day
So gas 405 carries out heat exchange intensification into the 4th NG superheaters 19 and sea water, and acquisition meets gas distributing system pressure, temperature requirement
NG。
(5) ice making：Cold-producing medium Ri and high-pressure liquid phase mixed working fluid 103 from ice making unit 23 is in mixed working fluid vaporizer 4
Middle heat exchange is condensed into liquid refrigerant Ro, and liquid refrigerant Ro returns ice making unit 23, provides cold for ice making subsystem；Simultaneously
Cold-producing medium Ri is exchanged heat in the first either simplex matter vaporizer 8 with the first either simplex of liquid phase matter 202 and is condensed into liquid refrigerant Ro, liquid system
Cryogen Ro returns ice making unit 23, provides cold for ice making subsystem；Cold-producing medium Ri and the second either simplex of high-pressure liquid phase matter 302 are the
Heat exchange in two either simplex matter vaporizers 13 is condensed into liquid refrigerant Ro, and liquid refrigerant Ro returns ice making unit 23, is ice making
System provides cold；Cold-producing medium Ri is exchanged heat in the 2nd NG superheaters 16 with high-pressure natural gas 402 and is condensed into liquid refrigerant Ro,
Liquid refrigerant Ro returns ice making unit 23, provides cold for ice making subsystem.
In addition, the control method of mixed working fluid and first, second either simplex matter is specific as follows：
Technological process is calculated using HYSYS technological process software for calculation, and there is electrical form function the inside, by electrical form
Input constraint formula.
A, setting mixed working fluid superheater 5, the first either simplex matter superheater 9, the second either simplex matter superheater 14, the 3rd NG are overheated
The entrance ocean temperature of device 17 and the 4th NG superheaters 19 is TSea intake, exit ocean temperature is TSeawer outlet, mix when entering
Working medium superheater 5, the first either simplex matter superheater 9, the second either simplex matter superheater 14, the 3rd NG superheaters 17 and the 4th NG superheaters
19 ocean temperature TSea intakeWhen known, mixed working fluid superheater 5, the first either simplex matter superheater 9, the second either simplex matter superheater 14,
The temperature restraint in the exit of the 3rd NG superheaters 17 and the 4th NG superheaters 19 is：TSeawer outlet=TSea intake- 5 DEG C, TSeawer outlet=
TSea intake- 5 DEG C is the mandatory provision in environment environmental regulation, it is to avoid sea water temperature drop is excessive to produce impact to earth ecology, that
It is constrained to by the mixed working fluid of heating of seawater, the first either simplex matter, the second either simplex matter and natural gas temperature respectively：
T105=TSea intake- 2 DEG C
T204=TSea intake- 2 DEG C
T304=TSea intake- 2 DEG C
T404=TSea intake- 2 DEG C
TPipe network natural gas=TSea intake- 2 DEG C
Wherein T105For the mixed working fluid temperature of the output of mixed working fluid superheater 5, T204Export for the first either simplex matter superheater 9
First single Temperature of Working, T304For second single Temperature of Working of the output of the second either simplex matter superheater 14, T404It is overheated for the 3rd NG
The natural gas temperature of the output of device 17, TPipe network natural gasFor the natural gas temperature of the output of the 4th NG superheaters 19；Go to b；
B, set mixed working fluid booster pump 2 output mixed working fluid constant pressure value as PMixed working fluid constant pressure, the constant pressure of mixed working fluid
Power is the saturated vapor pressure according to when annual minimum ocean temperature corresponding to the mixed working fluid temperature of the output of mixed working fluid superheater 5
Come what is determined, it is constrained to：
PMixed working fluid constant pressure=PMixed working fluid saturated vapor pressure@（TAnnual minimum sea intake- 2 DEG C）
Wherein TAnnual minimum sea intakeFor annual minimum 5 entrance ocean temperature of mixed working fluid superheater, PMixed working fluid saturated vapor pressureIt is to work as
When 5 entrance ocean temperature of mixed working fluid superheater is annual minimum, the saturation of the mixed working fluid of the output of mixed working fluid superheater 5
Vapour pressure, therefore mixed working fluid constant pressure is 1.5MPa；Go to c；
C, set LNG evaporator 1 and the minimum of heat exchanger 3 is close to temperature difference as 5 DEG C, when mixed working fluid temperature is sent out in system
During changing, the flow that can constantly adjust mixed working fluid by using the ADJUST functions of HYSYS softwares makes its match settings
Minimum be close to temperature, so as to obtain the flow and temperature of mixed working fluid；Go to d；
D, set the first either simplex matter booster pump 7 output the first either simplex matter constant pressure value as PFirst either simplex matter constant pressure, the first either simplex
Matter constant pressure is corresponding to first single Temperature of Working of the output of the first either simplex matter superheater 9 according to when annual minimum ocean temperature
Saturated vapor pressure come what is determined, be constrained to：
PFirst either simplex matter constant pressure=PFirst either simplex matter saturated vapor pressure@（TAnnual minimum sea intake- 2 DEG C）
Wherein TAnnual minimum sea intakeFor annual minimum 9 entrance ocean temperature of the first either simplex matter superheater, PFirst either simplex matter saturated vapor pressure
It is that, when 9 entrance ocean temperature of the first either simplex matter superheater is annual minimum, the first of the output of the first either simplex matter superheater 9 is single
The saturated vapor pressure of working medium, therefore the first either simplex matter constant pressure is 0.49MPa；Go to e；
E, when in system, first single Temperature of Working changes, can be by using the ADJUST functions of HYSYS softwares
Constantly the flow of the first either simplex matter of adjustment makes the minimum of its match settings be close to temperature, so as to obtain the first either simplex matter flow and
Temperature；Go to f；
F, set the second either simplex matter booster pump 12 output the second either simplex matter constant pressure value as PSecond either simplex matter constant pressure, the second either simplex
Matter constant pressure is right according to second single Temperature of Working institute of the output of the second either simplex matter superheater 14 during annual minimum ocean temperature
The saturated vapor pressure answered is constrained to come what is determined：
PSecond either simplex matter constant pressure=PSecond either simplex matter saturated vapor pressure@（TAnnual minimum sea intake- 2 DEG C）
Wherein TAnnual minimum sea intakeFor annual minimum 14 entrance ocean temperature of the second either simplex matter superheater, PSecond either simplex matter saturated vapor pressure
It is when 14 entrance ocean temperature of the second either simplex matter superheater is annual minimum the second of the output of second either simplex matter superheater 14
The saturated vapor pressure of either simplex matter, therefore the second either simplex matter constant pressure is 0.49MPa；Go to g；
G, set LNG evaporator 1 and the minimum of the second either simplex matter vaporizer 11 is close to temperature difference as 5 DEG C, when in system
When two single Temperature of Working change, the second either simplex matter can constantly be adjusted by using the ADJUST functions of HYSYS softwares
Flow makes the minimum of its match settings be close to temperature, so as to obtain the flow and temperature of the second either simplex matter.
In summary, when LNG and low pressure mixed working fluid carry out heat exchange in LNG evaporator 1, mixed working fluid is by LNG-
162 DEG C～-56 DEG C of cold energy is taken away, and high-pressure natural gas and the second either simplex matter carry out heat exchange in a NG superheaters 11, the
Two either simplex matter take away the cold energy of -56 DEG C～-10 DEG C of natural gas for generating electricity, while the mixing work in mixed working fluid Rankine cycle
Matter, the first either simplex matter and the second either simplex matter, high-pressure natural gas provide cold for ice making for cold-producing medium, which reduces sea
The usage amount of water.The overheated natural gas of the output of the 3rd NG superheaters 17 pressure Jing after 18 expansion work of NG decompressors is down to natural gas
Pressure needed for pipe network, the 4th NG superheaters of natural gas Jing as natural gas can also be lowered the temperature after expansion work, after expansion work
19 heat exchange heat up, the temperature being finally reached needed for gas distributing system.
In cyclic process, cold-producing medium Ri is used as working medium and high-pressure liquid phase mixed working fluid 103, high-pressure liquid phase the first either simplex matter
202nd, the second either simplex of high-pressure liquid phase matter 302 and high-pressure natural gas 402 carry out heat exchange so that cold-producing medium Ro takes away substantial amounts of cold energy
Cold is provided for ice making unit 23, ice making unit 23 directly cools down ice making using cold-producing medium Ro.The ice making of setting ice making unit 23
Measure as M, its unit is t/d, then the computing formula of 23 ice-making capacity of ice making unit is as follows：
Wherein, Q is the heat exchange amount of heat exchanger in ice making unit 23, and its unit is KW, and T is the temperature of ice making water, its
Unit for DEG C.
Embodiment two
The present embodiment with the difference of embodiment one is：Install between the import and outlet of mixed working fluid decompressor 6
There is the first by-pass reducing valve 20, second by-pass reducing valve 21 be installed between the import and outlet of the first either simplex matter decompressor 10,
The 3rd by-pass reducing valve 22 is installed between the import and outlet of the second either simplex matter decompressor 15（See Fig. 2）.In Rankine cycle
Decompressor arranges bypass, determines the flow direction of working medium by pressure loading valve, to ensure the independence of system vaporization function.Normal power generation
Under operating mode, working medium enters decompressor, and expansion work generates electricity；When decompressor maintenance and repair or failure, start pressure loading valve, working medium
Flow direction bypass, realizes the decrease temperature and pressure of working medium by pressure loading valve, further according to the Temperature of Working and pressure after pressure loading valve again
The circulating load of working medium in each rankine cycle is calculated, circulating energy is matched again, working medium pump adjusts working medium flow, it is ensured that circulation is just
Often run.Realize LNG vaporization and separate with generating function by arranging bypass and by-pass reducing valve, vaporization function can be avoided
By generating influence.
In addition to the implementation, this utility model can also have an other embodiment, the technical scheme that equivalent transformation is formed,
All fall within the protection domain of this utility model requirement.
Claims (7)
1. a kind of LNG cold energy utilization system, is characterized in that, including compound Rankine cycle power generation sub-system, either simplex matter Rankine
Circulating generation subsystem, ice making subsystem and direct expansion power generation sub-system, the compound Rankine cycle power generation sub-system include
LNG evaporator（1）, mixed working fluid booster pump（2）, heat exchanger（3）, mixed working fluid vaporizer（4）, mixed working fluid superheater（5）,
Mixed working fluid decompressor（6）, the first either simplex matter booster pump（7）, the first either simplex matter vaporizer（8）, the first either simplex matter superheater（9）
With the first either simplex matter decompressor（10）, the LNG evaporator（1）Change with first be arranged in first shell body including the first housing
Heat pipe, first housing have LNG imports and NG outlets, and the LNG imports are connected with LNG storage tank, and described first
There is heat exchanger tube the first mixed working fluid entrance and the first mixed working fluid to export, the first mixed working fluid entrance Jing pipelines with mix
Working medium decompressor（6）Connection, the first mixed working fluid outlet Jing pipelines and mixed working fluid booster pump（2）Connection；The heat exchange
Device（3）Including the second housing and the second heat exchanger tube being arranged in second shell body, second housing has the second mixed working fluid
Entrance and the outlet of the second mixed working fluid, the second mixed working fluid entrance Jing pipelines and mixed working fluid booster pump（2）Connection, it is described
Second heat exchanger tube is with first single working medium entrances and first single sender property outlet, described first single working medium entrances Jing pipeline and the first list
Working medium decompressor（10）Connection, described first single sender property outlet Jing pipelines and the first either simplex matter booster pump（7）Connection, described first
Either simplex matter booster pump（7）Sequentially pass through the first either simplex matter vaporizer（8）, the first either simplex matter superheater（9）It is swollen with the first either simplex matter
Swollen machine（10）Connection；The mixed working fluid vaporizer（4）Including the 3rd housing and the 3rd heat exchanger tube being arranged in the 3rd housing,
There is 3rd housing the 3rd mixed working fluid entrance and the 3rd mixed working fluid to export, the 3rd mixed working fluid entrance Jing pipelines
With the second mixed working fluid outlet, the 3rd mixed working fluid outlet Jing pipelines and mixed working fluid superheater（5）Connection, it is described
Mixed working fluid superheater（5）With mixed working fluid decompressor（6）Connection；
The either simplex matter Rankine cycle power generation sub-system includes a NG superheaters（11）, the second either simplex matter booster pump（12）, the
Two either simplex matter vaporizers（13）, the second either simplex matter superheater（14）With the second either simplex matter decompressor（15）, a NG is overheated
Device（11）Including the 4th housing and the 4th heat exchanger tube that is arranged in the 4th housing, the 4th housing have a NG imports and
2nd NG outlets, the NG import Jing pipelines and a NG outlets, the 4th heat exchanger tube have the second either simplex matter
Entrance and second single sender property outlet, described second single working medium entrances Jing pipeline and the second either simplex matter decompressor（15）Connection, it is described
Second single sender property outlet Jing pipelines and the second either simplex matter booster pump（12）Connection, the second either simplex matter booster pump（12）Jing successively
Cross the second either simplex matter vaporizer（13）, the second either simplex matter superheater（14）With the second either simplex matter decompressor（15）Connection；
The direct expansion power generation sub-system includes the 2nd NG superheaters（16）, the 3rd NG superheaters（17）, NG decompressors（18）
With the 4th NG superheaters（19）, the 2nd NG superheaters（16）Change with the 5th be arranged in the 5th housing including the 5th housing
Heat pipe, the 5th housing have the 2nd NG imports and the 3rd NG outlets, the 2nd NG imports and the 2nd NG outlets,
The 3rd NG outlet Jing pipelines and the 3rd NG superheaters（17）Connection, the 3rd NG superheaters（17）Expand with NG successively
Machine（18）, the 4th NG superheaters（19）Connection, the 4th NG superheaters（19）Connection gas distributing system；
The ice making subsystem includes ice making unit（23）, the ice making unit（23）Go out with refrigerant inlet and cold-producing medium
Mouthful, the ice making unit（23）Refrigerant outlet connect mixed working fluid vaporizer respectively（4）, the first either simplex matter vaporizer（8）、
Second either simplex matter vaporizer（13）, the 2nd NG superheaters（16）Refrigerant inlet, the ice making unit（23）Cold-producing medium enter
Mouth connects mixed working fluid vaporizer respectively（4）, the first either simplex matter vaporizer（8）, the second either simplex matter vaporizer（13）, the 2nd NG mistakes
Hot device（16）Refrigerant outlet.
2. LNG cold energy utilization system according to claim 1, is characterized in that, the mixed working fluid superheater（5）,
One either simplex matter superheater（9）, the second either simplex matter superheater（14）, the 3rd NG superheaters（17）, the 4th NG superheaters（19）Adopt
Exchanged heat as heating agent with sea water.
3. LNG cold energy utilization system according to claim 2, is characterized in that, the mixed working fluid superheater（5）,
One either simplex matter superheater（9）, the second either simplex matter superheater（14）, the 3rd NG superheaters（17）, the 4th NG superheaters（19）On set
Put seawater flow control valve.
4. LNG cold energy utilization system according to claim 3, is characterized in that, the mixed working fluid decompressor（6）,
One either simplex matter decompressor（10）, the second either simplex matter decompressor（15）, NG decompressors（18）Connect electromotor respectively.
5. LNG cold energy utilization system according to claim 4, is characterized in that, the mixed working fluid decompressor（6）Enter
The first by-pass reducing valve is installed between mouth and outlet（20）.
6. LNG cold energy utilization system according to claim 5, is characterized in that, the first either simplex matter decompressor（10）
Import and outlet between the second by-pass reducing valve is installed（21）.
7. LNG cold energy utilization system according to claim 6, is characterized in that, the second either simplex matter decompressor（15）
Import and outlet between the 3rd by-pass reducing valve is installed（22）.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194302A (en) * | 2016-08-31 | 2016-12-07 | 航天晨光股份有限公司 | A kind of LNG cold energy utilization system and method |
| CN106969258A (en) * | 2017-04-10 | 2017-07-21 | 合肥通用机械研究院 | A kind of integrated form central fluid gasifier |
| CN107777747A (en) * | 2017-09-29 | 2018-03-09 | 江苏科技大学 | A kind of LNG cold energy is used to generate electricity and seawater desalination system and its method of comprehensive utilization |
| CN108636115A (en) * | 2018-04-11 | 2018-10-12 | 上海交通大学 | Ammonia source filling system based on LNG cold energy |
| CN110257118A (en) * | 2019-07-19 | 2019-09-20 | 中冶焦耐(大连)工程技术有限公司 | A kind of LNG pipeline forecooling method and NG cold air generating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106194302A (en) * | 2016-08-31 | 2016-12-07 | 航天晨光股份有限公司 | A kind of LNG cold energy utilization system and method |
| CN106194302B (en) * | 2016-08-31 | 2018-07-10 | 航天晨光股份有限公司 | A kind of LNG cold energy utilization system and method |
| CN106969258A (en) * | 2017-04-10 | 2017-07-21 | 合肥通用机械研究院 | A kind of integrated form central fluid gasifier |
| CN106969258B (en) * | 2017-04-10 | 2019-08-20 | 合肥通用机械研究院有限公司 | A kind of integrated form central fluid gasifier |
| CN107777747A (en) * | 2017-09-29 | 2018-03-09 | 江苏科技大学 | A kind of LNG cold energy is used to generate electricity and seawater desalination system and its method of comprehensive utilization |
| CN108636115A (en) * | 2018-04-11 | 2018-10-12 | 上海交通大学 | Ammonia source filling system based on LNG cold energy |
| CN108636115B (en) * | 2018-04-11 | 2020-06-12 | 上海交通大学 | Ammonia source filling system based on LNG cold energy |
| CN110257118A (en) * | 2019-07-19 | 2019-09-20 | 中冶焦耐(大连)工程技术有限公司 | A kind of LNG pipeline forecooling method and NG cold air generating device |
| CN110257118B (en) * | 2019-07-19 | 2024-04-26 | 中冶焦耐(大连)工程技术有限公司 | LNG pipeline precooling method and NG cold air generating device |
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