CN208040469U - Single cycle twin-stage LNG cold energy generations and ice maker - Google Patents
Single cycle twin-stage LNG cold energy generations and ice maker Download PDFInfo
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- CN208040469U CN208040469U CN201820323803.4U CN201820323803U CN208040469U CN 208040469 U CN208040469 U CN 208040469U CN 201820323803 U CN201820323803 U CN 201820323803U CN 208040469 U CN208040469 U CN 208040469U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
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- Y02P60/85—Food storage or conservation, e.g. cooling or drying
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Abstract
The utility model discloses single cycle twin-stage LNG cold energy generations and ice makers, including the first condenser（1）, first condenser（1）Inlet and outlet respectively with LNG storage tank and the second condenser（7）It is connected, the second condenser（7）Successively with NG- refrigerant heat exchangers（9）, NG heaters（10）It is connected；Turbine power generation unit（6）Respectively with the first condenser（1）, the second condenser（7）Connection, the first condenser（1）, the second condenser（7）With working medium-refrigerant heat exchanger（3）Connection, working medium-refrigerant heat exchanger（3）Successively through evaporator（4）, superheater（5）With turbine power generation unit（6）Connection；NG- refrigerant heat exchangers（9）With working medium-refrigerant heat exchanger（3）Pass through pipeline and ice maker respectively（11）It is connected.The simplified of the utility model reduces investment and floor space, can save the required heat of LNG gasification and operating cost.
Description
Technical field
The utility model is related to LNG（Liquefied natural gas）Cold energy cascade utilization technical field, it is specifically a kind of singly to follow
Rankine is generated electricity and is combined with ice making according to LNG cold energy grades, established by ring twin-stage LNG cold energy generations and ice maker, the device
Play LNG cold energy cascade utilization systems.
Background technology
With the fast development of LNG trades, countries in the world are all in the approaches and methods for exploring LNG cold energy uses.Japan is right
The utilization of cold energy maintains the leading position in the world, and other than being used in combination with power plant, it is cold that independent LNG is also covered 20 more
Equipment, including air-separating plant, dry ice device processed, cryogenic refrigeration warehouse, low temperature Rankine cycle independent power generating device can be utilized.
Existing to utilize in LNG cold energy technologies, cold energy generation is the strongest Land use systems of applicability.There are mainly two types of the modes of power generation：
Direct expansion is generated electricity and is generated electricity using the Rankine cycle of intermediate medium.For LNG receiving stations, generally require and LNG is forced into 4~
Gasification is conveyed to downstream user after 10MPa.Direct expansion power generation is usually conveyed to after LNG is heated closer apart from receiving station
User use, user do not need high-pressure natural gas, can be used high-pressure natural gas direct expansion power generation, the main natural gas that recycles
Pressure energy.Rankine cycle power generation is more suitable for recycling the cold energy that LNG is discharged from low temperature by heating and gasifying.Conventional LNG Rankines power generation
Mode carries out the even multistage stage-by-stage heat exchange gas-to electricity of single-stage, two-stage, such as United States Patent (USP) including the use of intermediate medium
US2975605、US3018634、US3068659、US4320303。
CN103075250A discloses a kind of LNG cold energy step Rankine electricity generation system, including gas medium Rankine cycle
With coolant media Rankine cycle two parts, the multiple ladder of LNG is realized by controlling the pressure of gas medium and coolant media
Grade heat exchange is integrally improved the utilization rate of cold energy, and using fume afterheat as heat source, reduces environmental thermal pollution.But this is
System gasification 100t/h LNG need 66t/h natural gases to generate electricity as working medium, waste valuable natural gas energy resource, and natural gas is situated between
Matter Rankine cycle efficiency is only 20.21%, inefficiency.Gas pressure into turbine power generation is very high, condensed natural gas
Pressure defeated outside high pressure is boosted to further through high-pressure pump, wastes a large amount of cold energy.In addition to this, the utility model system is multiple
Miscellaneous, there are many equipment, and it is larger to be embodied difficulty.
CN101806293A proposes a kind of integrated optimization method improving generation efficiency of liquefied natural gas cold energy, including day
Three right gas direct expansion electricity generation system, refrigerant Rankine cycle electricity generation system and ice water system steps.The utility model is by combustion gas
The low temperature exhaust heat of power plant is introduced into system, is used for heated natural gas and refrigerant medium, improves natural gas and refrigerant medium into turbine
The temperature of expanding machine improves the LNG cold energy rate of recovery with this.
The above LNG cold energy uses scheme the problem is that, single-stage utilization ratio is low, and many LNG cold energy do not obtain
It makes full use of；Two-stage generates electricity or multilevel power generation system is huge, and equipment is more, and investment cost is high, deficiency in economic performance.
Invention content
The purpose of this utility model is in view of the problems of the existing technology, to provide a kind of Rankine generates electricity and mutually tied with ice making
The single cycle twin-stage LNG cold energy generations of conjunction and ice maker.
The purpose of this utility model solves by the following technical programs：
A kind of single cycle twin-stage LNG cold energy generations and ice maker, it is characterised in that：Described device includes the first condensation
Device, working medium-refrigerant heat exchanger, evaporator, superheater, turbine power generation unit, the second condenser, NG- refrigerant heat exchangers, NG heating
The LNG imports of device, ice maker, first condenser are connected by pipeline with LNG storage tank, and the LNG of the first condenser goes out
Mouth is connect by pipeline with the LNG imports of the second condenser, and the outlets LNG of the second condenser are exchanged heat by pipeline and NG- refrigerants
The LNG imports of device connect, and the outlets LNG of NG- refrigerant heat exchangers are connect by pipeline with the LNG imports of NG heaters, NG heating
The outlet of device is connected by pipeline with defeated pipe network outside natural gas；The turbine generators group is respectively through low pressure organic working medium gas
Body pipeline, in be pressed in the low pressure organic working medium import of machine Working medium gas pipeline and the first condenser, the second condenser and be pressed with
Machine working medium import connects, and the low pressure organic working medium of the first condenser exports, is pressed with machine sender property outlet in the second condenser through even
It is connect with the organic working medium import of working medium-refrigerant heat exchanger after logical pipeline connection, the organic working medium outlet of working medium-refrigerant heat exchanger
The generating working medium import connection through evaporator, superheater and turbine power generation unit successively by pipeline；The NG- refrigerant heat exchangers
It is connected respectively with the refrigerant exit of ice maker by pipeline with the refrigerant inlet of working medium-refrigerant heat exchanger, ice maker
Refrigerant inlet is connected by pipeline with the refrigerant exit of NG- refrigerant heat exchangers and working medium-refrigerant heat exchanger respectively.
The pipeline of the low pressure organic working medium outlet of first condenser is equipped with the first working medium pump and the second condenser
In be pressed with machine sender property outlet pipeline be equipped with the second working medium pump, the first condenser output low pressure organic working medium liquid and second
Machine worker quality liquid is pressed in condenser output respectively through corresponding first working medium pump and the pressurization of the second working medium pump at identical pressure
It is mixed after power, later again by being sent into the organic working medium import of working medium-refrigerant heat exchanger communicating pipe and from its of ice maker
In one refrigerant exchange heat.
The refrigerant exit of the NG- refrigerant heat exchangers and the refrigerant exit of working medium-refrigerant heat exchanger are respectively by corresponding
Connecting tube is connected with the mixing tube with refrigerant pump, and the mixing tube with refrigerant pump is connected with the refrigerant inlet of ice maker
It is logical.
The low pressure organic working medium steam pipework of the turbine power generation unit is equipped with the generating working medium with turbine power generation unit
The low pressure organic working medium steam-return line with the first valve that the overheat organic working medium steam pipework of entrance is connected；It is described
Being pressed with machine working substance steam pipeline in flat generating set and being equipped with has with the overheat of the generating working medium entrance of turbine power generation unit
Machine working substance steam pipeline be connected with being pressed with machine working substance steam circuit in the second valve.
The high pressure LNG that the LNG that the LNG storage tank is input to the first condenser is 4-10MPa.
The organic working medium is the mixing of one or more of ethane, ethylene, fluoroform, perfluoroethane
Object.
Heat source used by the evaporator, superheater and NG heaters is the low-grade heat source less than 40 DEG C.
The utility model has the following advantages compared with prior art：
The utility model by conventional two-stage Rankine cycle power generation by being reduced to the power generation of single cycle twin-stage Rankine, from turbine
Generating set discharge low pressure organic working medium steam and from turbine power generation unit extraction in be pressed with machine working substance steam respectively with not
Synthermal section of LNG heat exchange, can both be lowered into the temperature of the generating working medium of working medium-refrigerant heat exchanger, two-stage can also be divided to recycle LNG
Cold energy, and heat exchanger tube is using such as interior wave male-pipe, the inner or outer or inside and outside unique efficient special type pipe of conduit pipe, to subtract significantly
Few heat transmission equipment size；Single cycle twin-stage Rankine power generator has only used a kind of generating working medium simultaneously, and conventional two-stage is bright
Agree circulating generation and need two kinds of generating working mediums, thus with a set of turbine power generation unit instead of two sets of traditional turbine generators
Group simplifies flow and equipment composition, reduces investment and floor space.
The ice maker of the utility model includes two parts, and a part, which is third section cold energy, another part of recycling LNG, is
The cold energy that condensed power generation organic working medium carries is recycled, more fully utilizes LNG cold energy, while playing precooling generating working medium
Effect, the required heat of LNG gasification and operating cost can be saved.
Description of the drawings
Attached drawing 1 is the single cycle twin-stage LNG cold energy generations and ice maker schematic diagram of the utility model.
Wherein：1-the first condenser；2-the first working medium pump；3-working medium-refrigerant heat exchanger；4-evaporators；5-overheats
Device；6-turbine power generation units；7-the second condenser；8-the second working medium pump；9-NG- refrigerant heat exchangers；10-NG heaters；
11-ice makers；12-refrigerant pumps；13-the first valve；14-the second valve.
Specific implementation mode
The utility model is further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of single cycle twin-stage LNG cold energy generations and ice maker, the device include the first condenser 1,
Working medium-refrigerant heat exchanger 3, evaporator 4, superheater 5, turbine power generation unit 6, the second condenser 7, NG- refrigerant heat exchangers 9, NG
Heater 10, ice maker 11, wherein the LNG imports of the first condenser 1 are connected by pipeline with LNG storage tank, LNG storage tank is defeated
Enter the high pressure LNG for being 4-10MPa to the LNG of the first condenser 1, the outlets LNG of the first condenser 1 pass through pipeline and the second condensation
The LNG imports of device 7 connect, and the outlets LNG of the second condenser 7 are connect by pipeline with the LNG imports of NG- refrigerant heat exchangers 9,
The outlets LNG of NG- refrigerant heat exchangers 9 are connect by pipeline with the LNG imports of NG heaters 10, and the outlet of NG heaters 10 passes through
Pipeline is connected with defeated pipe network outside natural gas；Turbine power generation unit 6 respectively through low pressure organic working medium gas piping, in be pressed with machine work
Matter gas piping is connect with the middle pressure organic working medium import of the low pressure organic working medium import of the first condenser 1, the second condenser 7,
The low pressure organic working medium outlet of first condenser 1, be pressed in the second condenser 7 machine sender property outlet after connecting pipeline is connected to
The organic working medium import of working medium-refrigerant heat exchanger 3 connects, and the organic working medium outlet of working medium-refrigerant heat exchanger 3 passes through pipeline successively
It is connect with the generating working medium import of turbine power generation unit 6 through evaporator 4, superheater 5；NG- refrigerant heat exchangers 9 and working medium-refrigerant
The refrigerant inlet of heat exchanger 3 is connected by pipeline with the refrigerant exit of ice maker 11 respectively, the refrigerant of ice maker 11 into
Mouth is connected by pipeline with the refrigerant exit of NG- refrigerant heat exchangers 9 and working medium-refrigerant heat exchanger 3 respectively.In addition cold first
The pipeline of the low pressure organic working medium outlet of condenser 1, which is equipped in the first working medium pump 2 and the second condenser 7, is pressed with machine sender property outlet
Pipeline be equipped with the second working medium pump 8, the first condenser 1 output low pressure organic working medium liquid and the second condenser 7 output
In be pressed with machine worker quality liquid respectively through 2 and second working medium pump 8 of corresponding first working medium pump pressurize at identical pressure after mix, it
Afterwards again by be sent into communicating pipe the organic working medium import of working medium-refrigerant heat exchanger 3 with from ice maker 11 wherein one is cold
Matchmaker exchanges heat.The refrigerant exit of NG- refrigerant heat exchangers 9 and the refrigerant exit of working medium-refrigerant heat exchanger 3 are respectively by corresponding
Connecting tube is connected with the mixing tube with refrigerant pump 12, the refrigerant inlet of mixing tube and ice maker 11 with refrigerant pump 12
It is connected.The power generation work with turbine power generation unit 6 is equipped on the low pressure organic working medium steam pipework of turbine power generation unit 6 simultaneously
The low pressure organic working medium steam-return line with the first valve 13 that the overheat organic working medium steam pipework of matter entrance is connected；Thoroughly
Machine working substance steam pipeline is pressed in flat generating set 6 equipped with the overheat with the generating working medium entrance of turbine power generation unit 6
Organic working medium steam pipework be connected with being pressed with machine working substance steam circuit in the second valve 14；With the first valve 13
Low pressure organic working medium steam-return line and be in order to which turbine is sent out with the setting for being pressed with machine working substance steam circuit in the second valve 14
When motor group 6 breaks down, unit is protected, does not influence to be produced as safety and be arranged.The organic working medium that above-mentioned apparatus uses
For the mixture of one or more of ethane, ethylene, fluoroform, perfluoroethane.Evaporator 4, superheater 5 and NG add
Heat source used by hot device 10 is the low-grade heat source less than 40 DEG C；And heat exchanger tube use as interior wave male-pipe, it is inner or outer or
The unique efficient special type pipe such as inside and outside conduit pipe, to greatly reduce heat transmission equipment size.
Steps are as follows for the application method of the single cycle twin-stage LNG cold energy generations and ice maker：A, turbine power generation unit is arranged
The LNG that the low pressure organic working medium steam gone out is inputted with LNG storage tank exchanges heat in the first condenser, recycles low-temperature zone LNG cold energy shapes
At low pressure organic working medium liquid, the LNG of wherein LNG storage tank input needs the high pressure LNG through booster pump pressurization at 4-10MPa；b,
It is pressed with machine working substance steam from extracting out in turbine power generation unit to exchange heat in the second condenser with the LNG after first heat exchange, returns
It receives during middle-temperature section LNG cold energy is formed and is pressed with machine worker quality liquid；C, step（a）In low pressure organic working medium liquid and step（b）In
In be pressed with machine worker quality liquid need respectively through corresponding working medium pump pressurize at uniform pressure after remix, be then fed into working medium-
Refrigerant heat exchanger exchanges heat with refrigerant, then sequentially enters evaporator, superheater and heat source heat exchange and become to overheat organic working medium steam, send
Enter power generation of doing work in turbine power generation unit；D, step（b）The middle LNG after the second condenser exchanges heat again is changed in NG- refrigerants
It is exchanged heat with the refrigerant from ice maker to exchange the remaining high temperature section cold energy of LNG in hot device, by the LNG that exchanges heat three times through NG
It is sent to defeated pipe network outside natural gas after heater heating；E, step（d）In through NG- refrigerant heat exchangers heat exchange after refrigerant be sent into system
Ice production apparatus is used for ice making.In the above-mentioned methods, step（c）In working medium-refrigerant heat exchanger use refrigerant come from ice making dress
It sets, and the refrigerant after heat exchange and step（d）In through NG- refrigerant heat exchangers heat exchange after refrigerant converge, after refrigerant pump pressurizes
It is sent into ice maker and is used for ice making.Step（c）In evaporator, superheater and the step（d）In NG heaters used
Heat source be low-grade heat source less than 40 DEG C, which can be selected seawater, it is not limited to seawater, also using other low
Grade heat source such as recirculated water, the air less than 40 DEG C, can be combined with reality and utilizes combination with Solar use, industrial exhaust heat
Deng.
The single cycle twin-stage LNG cold energy generations of the utility model and ice maker, including single cycle twin-stage Rankine power generation and
Ice making two parts；Wherein single cycle twin-stage Rankine power generation process is：The high pressure LNG and turbine of 4-10MPa are forced into through booster pump
The low pressure organic working medium steam that generating set 6 is discharged exchanges heat in the first condenser 1 to recycle low-temperature zone LNG cold energy；After heat exchange
LNG and be pressed with machine working substance steam from being extracted out in turbine power generation unit 6 and exchanged heat in the second condenser 7 to recycle middle-temperature section
LNG cold energy；With LNG exchange heat after be condensed into low pressure organic working medium liquid, in be pressed with machine worker quality liquid respectively through the first working medium pump
2, the pressurization of the second working medium pump 8 initially enters in working medium-refrigerant heat exchanger 3 and comes from ice maker 11 at being mixed after uniform pressure
The heat exchange of wherein one refrigerant, then sequentially enter evaporator 4, the heat exchange of superheater 5 and heat source becomes to overheat organic working medium steam, into
Enter power generation of doing work in turbine power generation unit 6.Ice-making process is：The LNG to exchange heat by the first condenser 2,7 twin-stage of the second condenser
(it is cold to exchange the remaining high temperature sections of LNG with wherein one refrigerant heat exchange from ice maker 11 in NG- refrigerant heat exchangers 9
Can), 1 DEG C or so of natural gas is finally heated by NG heaters 10, into natural gas outside defeated pipe network；Through NG- refrigerant heat exchangers 9
Refrigerant after heat exchange converges with the refrigerant after the heat exchange of working medium-refrigerant heat exchanger 3, and entering ice making after the pressurization of refrigerant pump 12 fills
11 are set for ice making.
Embodiment one
LNG receiving stations provide LNG components (molar fraction) be：Methane 99.78%, ethane 0.1%, nitrogen 0.12%；Flow
For 200t/h, the organic working medium that Rankine cycle power generation uses selects ethane.
As shown in Figure 1, the workflow of single cycle twin-stage LNG cold energy generations and ice maker is：- 155 DEG C of LNG warps
Booster pump is forced into 9.8MPa, the low pressure organic working medium steam heat-exchanging come out with turbine generating set 6 in the first condenser 1,
Recycle low-temperature zone（- 155 DEG C~-102 DEG C）LNG cold energy obtain low pressure organic working medium liquid；LNG after heat exchange with from turbine
It is pressed with machine working substance steam in extracting out in generating set 6 to exchange heat in the second condenser 7, recycles middle-temperature section（- 102 DEG C~-47 DEG C）
LNG temperature cold energy obtain in be pressed with machine worker quality liquid；With LNG exchange heat after be condensed into low pressure organic working medium liquid, in be pressed with
Machine worker quality liquid mixes after the first working medium pump 2, the pressurization of the second working medium pump 8 are at uniform pressure respectively, into working medium-refrigerant heat exchange
Device 3 with from ice maker 11 wherein one refrigerant exchange heat, then sequentially enter evaporator 4, superheater 5 is obtained with seawater to make heat exchange
Organic working medium steam is overheated, into power generation of doing work in turbine generating set 6.The remaining high temperature sections of LNG（- 47 DEG C~-15 DEG C）It is cold
It can be finally heated by NG heaters 10 in NG- refrigerant heat exchangers 9 with after another strand of refrigerant heat exchange from ice maker 11
1 DEG C or so of natural gas, into natural gas outside defeated pipe network；Refrigerant after the heat exchange of NG- refrigerant heat exchangers 9 and process working medium-
Refrigerant after refrigerant heat exchanger 3 exchanges heat converges, and entering ice maker 11 after the pressurization of refrigerant pump 12 is used for ice making.
In this example one, the LNG of 200t/h is from -155 DEG C of heating and gasifyings to -15 DEG C of releasable cold energy 35350kW, in institute
In the cold energy cascade utilization device stated, turbine export shaft work 5166kW, the first working medium pump 2, the second working medium pump 8 power consumption difference
For 104.2kW, 132.8kW, ice making absorbs cold energy 15707kW, and the LNG cold energy effective rates of utilization of whole device are 58.38%, cold
Energy utilization rate is greatly improved.
The utility model is reduced to single cycle twin-stage Rankine power generator by the way that conventional two-stage Rankine cycle generates electricity, from
The low pressure organic working medium steam and machine working substance steam difference is pressed with from the extraction of turbine power generation unit that turbine power generation unit is discharged
It exchanges heat with different temperatures section LNG, can both be lowered into the temperature of the generating working medium of working medium-refrigerant heat exchanger, two-stage can also be divided to return
Receive LNG cold energy, and heat exchanger tube is using such as interior wave male-pipe, the inner or outer or inside and outside unique efficient special type pipe of conduit pipe, with
Greatly reduce heat transmission equipment size；Single cycle twin-stage Rankine power generator has only used a kind of generating working medium simultaneously, and conventional
Two-stage Rankine cycle power generation needs two kinds of generating working mediums, to be sent out instead of two sets of traditional turbines with a set of turbine power generation unit
Motor group simplifies flow and equipment composition, reduces investment and floor space；Ice maker can recycle the of LNG simultaneously
The cold energy that three sections of cold energy and condensed power generation organic working medium carry, more fully utilizes LNG cold energy, while playing precooling hair
The effect of electrician's matter can save the required heat of LNG gasification and operating cost.
Above example is only to illustrate the technological thought of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical solution, modification, replacement,
Combination simplifies, and each falls within scope of protection of the utility model；The technology that the utility model is not directed to can pass through the prior art
It is realized.
Claims (7)
1. a kind of single cycle twin-stage LNG cold energy generations and ice maker, it is characterised in that：Described device includes the first condenser
（1）, working medium-refrigerant heat exchanger（3）, evaporator（4）, superheater（5）, turbine power generation unit（6）, the second condenser（7）,NG-
Refrigerant heat exchanger（9）, NG heaters（10）, ice maker（11）, first condenser（1）LNG imports by pipeline with
LNG storage tank is connected, the first condenser（1）LNG outlet pass through pipeline and the second condenser（7）LNG imports connection, second
Condenser（7）The outlets LNG pass through pipeline and NG- refrigerant heat exchangers（9）LNG imports connection, NG- refrigerant heat exchangers（9）'s
The outlets LNG pass through pipeline and NG heaters（10）LNG imports connection, NG heaters（10）Outlet pass through pipeline and natural gas
Outer defeated pipe network is connected；The turbine power generation unit（6）Respectively through low pressure organic working medium gas piping, middle pressure organic working medium gas
Body pipeline and the first condenser（1）The import of low pressure organic working medium, the second condenser（7）Middle pressure organic working medium import connection,
First condenser（1）Low pressure organic working medium outlet, the second condenser（7）In be pressed with machine sender property outlet and be connected to through connecting pipeline
Afterwards with working medium-refrigerant heat exchanger（3）Organic working medium import connection, working medium-refrigerant heat exchanger（3）Organic working medium outlet pass through
Pipeline is successively through evaporator（4）, superheater（5）With turbine power generation unit（6）Generating working medium import connection；The NG- refrigerants
Heat exchanger（9）With working medium-refrigerant heat exchanger（3）Refrigerant inlet pass through pipeline and ice maker respectively（11）Refrigerant exit phase
Connection, ice maker（11）Refrigerant inlet pass through pipeline and NG- refrigerant heat exchangers respectively（9）With working medium-refrigerant heat exchanger（3）
Refrigerant exit be connected.
2. single cycle twin-stage LNG cold energy generations according to claim 1 and ice maker, it is characterised in that：Described first
Condenser（1）Low pressure organic working medium outlet pipeline be equipped with the first working medium pump（2）And second condenser（7）In be pressed with machine
The pipeline of sender property outlet is equipped with the second working medium pump（8）, the first condenser（1）The low pressure organic working medium liquid of output and second cold
Condenser（7）Machine worker quality liquid is pressed with respectively through corresponding first working medium pump in output（2）With the second working medium pump（8）Pressurize into phase
It is mixed after same pressure, passes through again communicating pipe be sent into working medium-refrigerant heat exchanger later（3）Organic working medium import with come from ice making
Device（11）Wherein one refrigerant exchange heat.
3. single cycle twin-stage LNG cold energy generations according to claim 1 and ice maker, it is characterised in that：The NG- is cold
Matchmaker's heat exchanger（9）Refrigerant exit and working medium-refrigerant heat exchanger（3）Refrigerant exit respectively by corresponding connecting tube with carry
Refrigerant pump（12）Mixing tube be connected, carry refrigerant pump（12）Mixing tube and ice maker（11）Refrigerant inlet be connected
It is logical.
4. single cycle twin-stage LNG cold energy generations according to claim 1 and ice maker, it is characterised in that：The turbine
Generating set（6）Low pressure organic working medium steam pipework be equipped with and turbine power generation unit（6）Generating working medium entrance mistake
What hot organic working medium steam pipework was connected carries the first valve（13）Low pressure organic working medium steam-return line；The turbine power generation
Unit（6）In be pressed with machine working substance steam pipeline be equipped with and turbine power generation unit（6）The overheat of generating working medium entrance have
What machine working substance steam pipeline was connected carries the second valve（14）In be pressed with machine working substance steam circuit.
5. single cycle twin-stage LNG cold energy generations according to claim 1 and ice maker, it is characterised in that：The LNG
Storage tank is input to the first condenser（1）LNG be 4-10MPa high pressure LNG.
6. single cycle twin-stage LNG cold energy generations according to claim 1 and ice maker, it is characterised in that：Described has
Machine working medium is the mixture of one or more of ethane, ethylene, fluoroform, perfluoroethane.
7. single cycle twin-stage LNG cold energy generations according to claim 1 and ice maker, it is characterised in that：The steaming
Send out device（4）, superheater（5）With NG heaters（10）Used heat source is the low-grade heat source less than 40 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820323803.4U CN208040469U (en) | 2018-03-09 | 2018-03-09 | Single cycle twin-stage LNG cold energy generations and ice maker |
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|---|---|---|---|
| CN201820323803.4U CN208040469U (en) | 2018-03-09 | 2018-03-09 | Single cycle twin-stage LNG cold energy generations and ice maker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220341A (en) * | 2019-06-05 | 2019-09-10 | 广东海洋大学 | A kind of power generation and ice making association system using natural gas overbottom pressure |
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2018
- 2018-03-09 CN CN201820323803.4U patent/CN208040469U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220341A (en) * | 2019-06-05 | 2019-09-10 | 广东海洋大学 | A kind of power generation and ice making association system using natural gas overbottom pressure |
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