CN105649698A - Process and device for carrying out power generation by virtue of cascade cold energy of liquefied natural gas - Google Patents
Process and device for carrying out power generation by virtue of cascade cold energy of liquefied natural gas Download PDFInfo
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- CN105649698A CN105649698A CN201610152158.XA CN201610152158A CN105649698A CN 105649698 A CN105649698 A CN 105649698A CN 201610152158 A CN201610152158 A CN 201610152158A CN 105649698 A CN105649698 A CN 105649698A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
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Abstract
The invention discloses a process and a device for carrying out power generation by virtue of the cascade cold energy of liquefied natural gas. The process for power generation comprises the following steps: the low-pressure liquefied natural gas from an LNG storage tank is divided into two paths, one path enters a submerged combustion vaporizer through a high-pressure conveying pump of an LNG receiving station to be gasified and then is conveyed outwards through an outward conveying tube network; the other path of the low-pressure liquefied natural gas from the LNG storage tank is pressurized into high-pressure LNG through the high-pressure conveying pump, and the high-pressure LNG enters a first-stage Rankine cycle and a second-stage Rankine cycle respectively, so as to assist the first-stage Rankine cycle and the second-stage Rankine cycle to generate power; and then the high-pressure LNG is gasified into gaseous-state natural gas, enters the natural gas outward conveying tube network, and is combined with the natural gas from the submerged combustion vaporizer and then conveyed outwards. According to the invention, a power generation system with two-stage transversal Rankine cycles is used for power generation; the LNG outward conveying high-pressure pump and an air-temperature vaporizer are arranged independently, thus consideration can also be given to the need of peak regulation of the LNG receiving station, and the operation is flexible and convenient. Power generation is carried out by virtue of the cold energy of the LNG, and the energy-saving effect is more prominent.
Description
Technical field
The present invention relates to the use of natural gas cold energy and carry out power field, specifically a kind of utilize liquefied natural gas step cold energy to carry out technique and the device generated electricity.
Background technology
Natural gas with it efficiently, the excellent performance such as high-quality, cleaning and purposes widely, it has also become a kind of safe and clean energy that countries in the world are generally good. after natural gas liquefaction, volume is reduced to original 1/600, it is easy to long distance delivery, after LNG is arrived at a station by shipping, need liquid LNG is converted gaseous state, process discharges the cold of about 830��860MJ/t, traditional method is to make LNG gasify either directly through seawater vaporizer (ORV), a large amount of cold energy are taken away in vain by sea water and are not utilized, especially poor at seawater quality or hinterland LNG receiving station many employings submerged combustion carburator (SCV) carries out LNG gasification, not only cause the waste of LNG cold energy, also make consumption using increasing LNG as fuel simultaneously, cause great energy waste.
Utilizing in various technology at LNG cold energy, there is most practical feasibility, utilize completeness simultaneously also most probable utilize the method for LNG cold energy exactly for generating electricity on a large scale. Two aspects are mainly had to consider: on the one hand, LNG cold energy is used for electricity generation system, because its industrial chain is very short, is not substantially affected by the interference of other extraneous factor, and other LNG cold energy use mode industrial chain is all very long, it is easy to be subject to the impact of the factors such as market, resource, environment, transport. On the other hand, utilize LNG cold energy generation, the cold energy of recyclable LNG major part temperature section, and other cold energy use mode reclaims mainly for a small amount of cold energy of LNG portion of certain zone temperatures gradient.
Summary of the invention
The technical assignment of the present invention is to provide and a kind of utilizes liquefied natural gas step cold energy to carry out technique and the device generated electricity.
The technical assignment of the present invention realizes in the following manner, and the processing step of this generating is as follows:
A) low pressure liquefied natural gas from LNG storage tank being divided into two strands, one is pressurized to 5��10MPaG by LNG receiving station high-pressure delivery pump, enters submerged combustion carburator and gasifies after 0 DEG C outer defeated by outer defeated pipe network;
B) it is pressurized to 5��10MPaG from one low pressure liquefied natural gas other of LNG storage tank through high-pressure delivery pump and becomes high pressure LNG, high pressure LNG respectively enters one-level Rankine cycle and two grades of Rankine cycles, and the 2# working medium of the 1# working medium of one-level Rankine cycle and two grades of Rankine cycles is condensed respectively; High pressure LNG endothermic gasification in first-stage condenser and secondary condenser is gaseous natural gas, natural gas temperature is-38 DEG C, natural gas enters air temperature type vaporizer and is heated to 0 DEG C, enters after the outer defeated pipe network of natural gas merges with the natural gas from submerged combustion carburator outer defeated;
C) in one-level Rankine cycle, circulation 1# working medium enters one-level vaporizer after being pressurized to 2��3.5MPaG by one-level working medium pump, through carrying out heat exchange with high-temperature water, 1# Temperature of Working enters into first turbine after being increased to 10��20 DEG C by-70��-95 DEG C, 1# working medium expansion work in first turbine, drives one-level electrical power generators outer defeated; 1# working medium is-70��-90 DEG C in first turbine outlet temperature, and pressure is 0.1��0.3MpaG; 1# working medium enters first-stage condenser, by carrying out heat exchange with high pressure LNG, reduces to-75��-95 DEG C in first-stage condenser outlet temperature and is condensed into liquid, being circulated subsequently into one-level working medium pump;
D) in two grades of Rankine cycles, circulation 2# working medium enters secondary evaporimeter after being pressurized to 0.5��1.0MPaG by two grades of working medium pumps, through carrying out heat exchange with high-temperature water, 2# Temperature of Working enters into second turbine after being increased to 10��20 DEG C by-41��-60 DEG C, 2# working medium expansion work in second turbine, drives secondary generator generating outer defeated; 2# working medium is-30��-60 DEG C in second turbine outlet temperature, and pressure is 0.1��0.3MpaG; 2# working medium enters secondary condenser, by carrying out heat exchange with high pressure LNG, reduces to-41��-60 DEG C in secondary condenser outlet temperature and is condensed into liquid, being circulated subsequently into two grades of working medium pumps.
In two grades of described Rankine cycles, circulation does not need work, and when in one-level Rankine cycle, circulation needs normal operation, in one-level Rankine cycle, high pressure LNG after heat exchange and another strand enter submerged combustion carburator after converging from the LNG of LNG receiving station high-pressure delivery pump discharge, gasify and to enter outer defeated pipe network after being heated to 0 DEG C outer defeated.
This utilizes the device that liquefied natural gas step cold energy carries out generating electricity to include LNG storage tank, one-level Rankine cycle devices, two grades of Rankine cycle devices, air temperature type vaporizer and submerged combustion carburator;
LNG storage tank is connected with LNG receiving station high-pressure delivery pump and at least one high pressure LNG delivery pump respectively by pipeline, LNG receiving station high-pressure delivery delivery side of pump is connected with submerged combustion carburator by pipeline, and the outlet of submerged combustion carburator is connected with outer defeated pipe network by pipeline;
High pressure LNG carries delivery side of pump to be connected with the first-stage condenser in one-level Rankine cycle devices by pipeline, and the outlet of first-stage condenser is connected with the secondary condenser in submerged combustion carburator, two grades of Rankine cycle devices respectively by pipeline; The outlet of secondary condenser is connected with at least two air temperature type vaporizer by pipeline, and the outlet of air temperature type vaporizer is connected by the outlet conduit of pipeline with submerged combustion carburator.
Described one-level Rankine cycle devices includes one-level vaporizer, first turbine, one-level electromotor, first-stage condenser and 1# working medium storage tank; The outlet of 1# working medium storage tank is connected with one-level working medium pump by pipeline, and one-level working medium delivery side of pump is connected with one-level vaporizer by pipeline, and the outlet of one-level vaporizer is connected with first turbine by pipeline, and first turbine is connected with one-level electromotor; The outlet of the first turbine working medium circulation inlet communication by pipeline Yu first-stage condenser, the working medium circulation outlet of the first-stage condenser inlet communication by pipeline Yu one-level working medium pump.
Two grades of described Rankine cycle devices include secondary evaporimeter, second turbine, secondary generator, secondary condenser and 2# working medium storage tank;The outlet of 2# working medium storage tank is by pipeline and two grades of working medium pump connections, and two grades of working medium delivery side of pump are connected with secondary evaporimeter by pipeline, and the outlet of secondary evaporimeter is connected with second turbine by pipeline, and second turbine is connected with secondary generator; The outlet of the second turbine working medium circulation inlet communication by pipeline Yu secondary condenser, the working medium circulation outlet of the secondary condenser inlet communication by pipeline and two grades of working medium pumps.
When described high pressure LNG delivery pump is provided with two or more, two or more high pressure LNG delivery pumps are arranged in parallel.
When described air temperature type vaporizer is provided with two or more, two or more air temperature type vaporizers are arranged in parallel.
A kind of technique utilizing liquefied natural gas step cold energy to carry out generating electricity of the present invention and device are compared to the prior art, utilize horizontal two-stage Rankine cycle electricity generation system generating, it is independently arranged the outer defeated high-pressure pump of LNG and air temperature type vaporizer, the needs of LNG receiving station peak regulation, flexible and convenient operation can be taken into account. Horizontal two-stage LNG cold energy Rankine electricity generation system cycle efficieny, LNG generated energy per ton and cold energy use rate are all higher. The occasion many employings submerged combustion carburator (SCV) that LNG receiving station can not meet seawater vaporizer (ORV) or hydropenia at seawater quality simultaneously carries out gasification LNG, in this case, utilizes LNG cold energy generation, and energy-saving effect is more prominent.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural representation utilizing liquefied natural gas step cold energy to carry out technique and the device generated electricity.
In figure: 1, one-level working medium pump, 2, one-level vaporizer, 3, first turbine, 4, one-level electromotor, 5, first-stage condenser, 6,1# working medium storage tank, 7, two grades of working medium pumps, 8, secondary evaporimeter, 9, second turbine, 10, secondary generator, 11, secondary condenser, 12,2# working medium storage tank, 13, high pressure LNG delivery pump, 14, air temperature type vaporizer, 15, LNG receiving station high-pressure delivery pump, 16, submerged combustion carburator, 17, LNG storage tank.
Detailed description of the invention
Embodiment 1:
Assembling this utilizes liquefied natural gas step cold energy to carry out the device generated electricity:
The device of this generating includes LNG storage tank 17, one-level Rankine cycle devices, two grades of Rankine cycle devices, air temperature type vaporizer 14 and submerged combustion carburator 16;
LNG storage tank 17 is connected with LNG receiving station high-pressure delivery pump 15 and a high pressure LNG delivery pump 13 respectively by pipeline, the outlet of LNG receiving station high-pressure delivery pump 15 is connected with submerged combustion carburator 16 by pipeline, and the outlet of submerged combustion carburator 16 is connected with outer defeated pipe network by pipeline;
The outlet of high pressure LNG delivery pump 13 is connected with the first-stage condenser 5 in one-level Rankine cycle devices by pipeline, and the outlet of first-stage condenser 5 is connected with the secondary condenser 11 in 16, two grades of Rankine cycle devices of submerged combustion carburator respectively by pipeline; The outlet of secondary condenser 11 is connected by pipeline and two air temperature type vaporizers being arranged in parallel 14, and the outlet of air temperature type vaporizer 14 is connected by the outlet conduit of pipeline with submerged combustion carburator 16; Two above-mentioned air temperature type vaporizers being arranged in parallel 14, one properly functioning, and one is used for defrosting.
Described one-level Rankine cycle devices includes one-level vaporizer 2, first turbine 3, one-level electromotor 4, first-stage condenser 5 and 1# working medium storage tank 6; The outlet of 1# working medium storage tank 6 is connected with one-level working medium pump 1 by pipeline, and the outlet of one-level working medium pump 1 is connected with one-level vaporizer 2 by pipeline, and the outlet of one-level vaporizer 2 is connected with first turbine 3 by pipeline, and first turbine 3 is connected with one-level electromotor 4;The outlet of the first turbine 3 working medium circulation inlet communication by pipeline Yu first-stage condenser 5, the working medium circulation outlet of first-stage condenser 5 inlet communication by pipeline Yu one-level working medium pump 1.
Two grades of described Rankine cycle devices include secondary evaporimeter 8, second turbine 9, secondary generator 10, secondary condenser 11 and 2# working medium storage tank 12; The outlet of 2# working medium storage tank 12 is connected by pipeline and two grades of working medium pumps 7, the outlet of two grades of working medium pumps 7 is connected with secondary evaporimeter 8 by pipeline, the outlet of secondary evaporimeter 8 is connected with second turbine 9 by pipeline, and second turbine 9 is connected with secondary generator 10; The outlet of the second turbine 9 working medium circulation inlet communication by pipeline Yu secondary condenser 11, the working medium circulation outlet of secondary condenser 11 inlet communication by pipeline and two grades of working medium pumps 7.
Embodiment 2:
Assembling this utilizes liquefied natural gas step cold energy to carry out the device generated electricity:
The device of this generating includes LNG storage tank 17, one-level Rankine cycle devices, two grades of Rankine cycle devices, air temperature type vaporizer 14 and submerged combustion carburator 16;
LNG storage tank 17 is connected with LNG receiving station high-pressure delivery pump 15 and two high pressure LNG delivery pumps 13 being arranged in parallel respectively by pipeline, the outlet of LNG receiving station high-pressure delivery pump 15 is connected with submerged combustion carburator 16 by pipeline, and the outlet of submerged combustion carburator 16 is connected with outer defeated pipe network by pipeline;
The outlet of high pressure LNG delivery pump 13 is connected with the first-stage condenser 5 in one-level Rankine cycle devices by pipeline, and the outlet of first-stage condenser 5 is connected with the secondary condenser 11 in 16, two grades of Rankine cycle devices of submerged combustion carburator respectively by pipeline; The outlet of secondary condenser 11 is connected by pipeline and three air temperature type vaporizers being arranged in parallel 14, the outlet of air temperature type vaporizer 14 is connected by the outlet conduit of pipeline with submerged combustion carburator 16, three above-mentioned air temperature type vaporizers being arranged in parallel 14, two properly functioning, and one is used for defrosting.
Described one-level Rankine cycle devices includes one-level vaporizer 2, first turbine 3, one-level electromotor 4, first-stage condenser 5 and 1# working medium storage tank 6; The outlet of 1# working medium storage tank 6 is connected with one-level working medium pump 1 by pipeline, and the outlet of one-level working medium pump 1 is connected with one-level vaporizer 2 by pipeline, and the outlet of one-level vaporizer 2 is connected with first turbine 3 by pipeline, and first turbine 3 is connected with one-level electromotor 4; The outlet of the first turbine 3 working medium circulation inlet communication by pipeline Yu first-stage condenser 5, the working medium circulation outlet of first-stage condenser 5 inlet communication by pipeline Yu one-level working medium pump 1.
Two grades of described Rankine cycle devices include secondary evaporimeter 8, second turbine 9, secondary generator 10, secondary condenser 11 and 2# working medium storage tank 12; The outlet of 2# working medium storage tank 12 is connected by pipeline and two grades of working medium pumps 7, the outlet of two grades of working medium pumps 7 is connected with secondary evaporimeter 8 by pipeline, the outlet of secondary evaporimeter 8 is connected with second turbine 9 by pipeline, and second turbine 9 is connected with secondary generator 10; The outlet of the second turbine 9 working medium circulation inlet communication by pipeline Yu secondary condenser 11, the working medium circulation outlet of secondary condenser 11 inlet communication by pipeline and two grades of working medium pumps 7.
The above-mentioned processing step utilizing liquefied natural gas step cold energy to carry out TRT is as follows:
A) low pressure liquefied natural gas from LNG storage tank 17 being divided into two strands, one is pressurized to 5��10MPaG by LNG receiving station high-pressure delivery pump 15, enters submerged combustion carburator 16 and gasifies after 0 DEG C outer defeated by outer defeated pipe network;
B) it is pressurized to 5��10MPaG from one low pressure liquefied natural gas other of LNG storage tank 17 through high pressure LNG delivery pump 13 and becomes high pressure LNG, high pressure LNG respectively enters one-level Rankine cycle and two grades of Rankine cycles, and the 2# working medium of the 1# working medium of one-level Rankine cycle and two grades of Rankine cycles is condensed respectively; High pressure LNG endothermic gasification in first-stage condenser and secondary condenser is gaseous natural gas, natural gas temperature is-38 DEG C, natural gas enters air temperature type vaporizer 14 and is heated to 0 DEG C, enters after the outer defeated pipe network of natural gas merges with the natural gas from submerged combustion carburator 16 outer defeated;
C) one-level Rankine cycle circulates 1# working medium pass through to enter one-level vaporizer 2 after one-level working medium pump 1 is pressurized to 2��3.5MPaG, through carrying out heat exchange with high-temperature water, 1# Temperature of Working enters into first turbine 3 after being increased to 10��20 DEG C by-70��-95 DEG C, 1# working medium is expansion work in first turbine 3, drives one-level electromotor 4 to generate electricity outer defeated; 1# working medium is-70��-90 DEG C in first turbine 3 outlet temperature, and pressure is 0.1��0.3MpaG; 1# working medium enters first-stage condenser 5, by carrying out heat exchange with high pressure LNG, reduces to-75��-95 DEG C in first-stage condenser 5 outlet temperature and is condensed into liquid, being circulated subsequently into one-level working medium pump 1;
D) two grades of Rankine cycles circulate 2# working medium pass through to enter secondary evaporimeter 8 after two grades of working medium pumps 7 are pressurized to 0.5��1.0MPaG, through carrying out heat exchange with high-temperature water, 2# Temperature of Working enters into second turbine 9 after being increased to 10��20 DEG C by-41��-60 DEG C, 2# working medium is expansion work in second turbine 9, drives secondary generator 10 to generate electricity outer defeated; 2# working medium is-30��-60 DEG C in second turbine 9 outlet temperature, and pressure is 0.1��0.3MpaG; 2# working medium enters secondary condenser 11, by carrying out heat exchange with high pressure LNG, reduces to-41��-60 DEG C in secondary condenser 11 outlet temperature and is condensed into liquid, being circulated subsequently into two grades of working medium pumps 7.
E) in two grades of Rankine cycles, circulation does not need work, and when in one-level Rankine cycle, circulation needs normal operation, in one-level Rankine cycle, high pressure LNG after heat exchange and another strand enter submerged combustion carburator 16 after converging from the LNG of LNG receiving station high-pressure delivery pump 15 outlet, gasify and to enter outer defeated pipe network after being heated to 0 DEG C outer defeated.
By detailed description of the invention above, described those skilled in the art can be easy to realize the present invention. It is understood that the present invention is not limited to above-mentioned several detailed description of the invention. On the basis of disclosed embodiment, described those skilled in the art can the different technical characteristic of combination in any, thus realizing different technical schemes.
Claims (7)
1. one kind utilizes the technique that liquefied natural gas step cold energy carries out generating electricity, it is characterised in that the processing step of this generating is as follows:
A) low pressure liquefied natural gas from LNG storage tank being divided into two strands, one is pressurized to 5��10MPaG by LNG receiving station high-pressure delivery pump, enters submerged combustion carburator and gasifies after 0 DEG C outer defeated by outer defeated pipe network;
B) it is pressurized to 5��10MPaG from one low pressure liquefied natural gas other of LNG storage tank through high-pressure delivery pump and becomes high pressure LNG, high pressure LNG respectively enters one-level Rankine cycle and two grades of Rankine cycles, and the 2# working medium of the 1# working medium of one-level Rankine cycle and two grades of Rankine cycles is condensed respectively; High pressure LNG endothermic gasification in first-stage condenser and secondary condenser is gaseous natural gas, natural gas temperature is-38 DEG C, natural gas enters air temperature type vaporizer and is heated to 0 DEG C, enters after the outer defeated pipe network of natural gas merges with the natural gas from submerged combustion carburator outer defeated;
C) in one-level Rankine cycle, circulation 1# working medium enters one-level vaporizer after being pressurized to 2��3.5MPaG by one-level working medium pump, through carrying out heat exchange with high-temperature water, 1# Temperature of Working enters into first turbine after being increased to 10��20 DEG C by-70��-95 DEG C, 1# working medium expansion work in first turbine, drives one-level electrical power generators outer defeated; 1# working medium is-70��-90 DEG C in first turbine outlet temperature, and pressure is 0.1��0.3MpaG; 1# working medium enters first-stage condenser, by carrying out heat exchange with high pressure LNG, reduces to-75��-95 DEG C in first-stage condenser outlet temperature and is condensed into liquid, being circulated subsequently into one-level working medium pump;
D) in two grades of Rankine cycles, circulation 2# working medium enters secondary evaporimeter after being pressurized to 0.5��1.0MPaG by two grades of working medium pumps, through carrying out heat exchange with high-temperature water, 2# Temperature of Working enters into second turbine after being increased to 10��20 DEG C by-41��-60 DEG C, 2# working medium expansion work in second turbine, drives secondary generator generating outer defeated; 2# working medium is-30��-60 DEG C in second turbine outlet temperature, and pressure is 0.1��0.3MpaG; 2# working medium enters secondary condenser, by carrying out heat exchange with high pressure LNG, reduces to-41��-60 DEG C in secondary condenser outlet temperature and is condensed into liquid, being circulated subsequently into two grades of working medium pumps.
2. a kind of technique utilizing liquefied natural gas step cold energy to carry out generating electricity according to claim 1, it is characterized in that, in two grades of described Rankine cycles, circulation does not need work, and when in one-level Rankine cycle, circulation needs normal operation, in one-level Rankine cycle, high pressure LNG after heat exchange and another strand enter submerged combustion carburator after converging from the LNG of LNG receiving station high-pressure delivery pump discharge, gasify and to enter outer defeated pipe network after being heated to 0 DEG C outer defeated.
3. one kind utilizes liquefied natural gas step cold energy to carry out the device generated electricity, it is characterised in that this device includes LNG storage tank, one-level Rankine cycle devices, two grades of Rankine cycle devices, air temperature type vaporizer and submerged combustion carburator;
LNG storage tank is connected with LNG receiving station high-pressure delivery pump and at least one high pressure LNG delivery pump respectively by pipeline, LNG receiving station high-pressure delivery delivery side of pump is connected with submerged combustion carburator by pipeline, and the outlet of submerged combustion carburator is connected with outer defeated pipe network by pipeline;
High pressure LNG carries delivery side of pump to be connected with the first-stage condenser in one-level Rankine cycle devices by pipeline, and the outlet of first-stage condenser is connected with the secondary condenser in submerged combustion carburator, two grades of Rankine cycle devices respectively by pipeline; The outlet of secondary condenser is connected with at least two air temperature type vaporizer by pipeline, and the outlet of air temperature type vaporizer is connected by the outlet conduit of pipeline with submerged combustion carburator.
4. according to claim 3 a kind of utilize liquefied natural gas step cold energy to carry out the device generated electricity, it is characterised in that described one-level Rankine cycle devices includes one-level vaporizer, first turbine, one-level electromotor, first-stage condenser and 1# working medium storage tank; The outlet of 1# working medium storage tank is connected with one-level working medium pump by pipeline, and one-level working medium delivery side of pump is connected with one-level vaporizer by pipeline, and the outlet of one-level vaporizer is connected with first turbine by pipeline, and first turbine is connected with one-level electromotor; The outlet of the first turbine working medium circulation inlet communication by pipeline Yu first-stage condenser, the working medium circulation outlet of the first-stage condenser inlet communication by pipeline Yu one-level working medium pump.
5. according to claim 3 a kind of utilize liquefied natural gas step cold energy to carry out the device generated electricity, it is characterised in that two grades of described Rankine cycle devices include secondary evaporimeter, second turbine, secondary generator, secondary condenser and 2# working medium storage tank; The outlet of 2# working medium storage tank is by pipeline and two grades of working medium pump connections, and two grades of working medium delivery side of pump are connected with secondary evaporimeter by pipeline, and the outlet of secondary evaporimeter is connected with second turbine by pipeline, and second turbine is connected with secondary generator; The outlet of the second turbine working medium circulation inlet communication by pipeline Yu secondary condenser, the working medium circulation outlet of the secondary condenser inlet communication by pipeline and two grades of working medium pumps.
6. according to claim 3 a kind of utilize liquefied natural gas step cold energy to carry out the device generated electricity, it is characterised in that when described high pressure LNG delivery pump is provided with two or more, two or more high pressure LNG delivery pumps are arranged in parallel.
7. according to claim 3 a kind of utilize liquefied natural gas step cold energy to carry out the device generated electricity, it is characterised in that when described air temperature type vaporizer is provided with two or more, two or more air temperature type vaporizers are arranged in parallel.
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| CN106939802A (en) * | 2017-04-12 | 2017-07-11 | 上海交通大学 | Generated electricity and remaining cold output system and method using the mixed working fluid step of LNG cold energy |
| CN106939802B (en) * | 2017-04-12 | 2019-07-12 | 上海交通大学 | Utilize the power generation of mixed working fluid step and remaining cooling capacity output system and method for LNG cold energy |
| CN110761864A (en) * | 2019-11-08 | 2020-02-07 | 江苏科技大学 | Novel cold energy comprehensive utilization system of liquefied natural gas power container ship |
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