CN106545370A - A kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy - Google Patents
A kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy Download PDFInfo
- Publication number
- CN106545370A CN106545370A CN201611245328.5A CN201611245328A CN106545370A CN 106545370 A CN106545370 A CN 106545370A CN 201611245328 A CN201611245328 A CN 201611245328A CN 106545370 A CN106545370 A CN 106545370A
- Authority
- CN
- China
- Prior art keywords
- helium
- lng
- regenerator
- outlet
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention provides a kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy, and the electricity generation system at least includes first order circulation, second level circulation, LNG storage tank, voltage regulating station, combustion chamber and air preheater；First helium compressor, the first regenerator, the first flue gas helium heat exchanger, the first helium gas turbine, the first regenerator, the first heating boiler are sequentially passed through from the first helium LNG heat exchangers and forms the first order circulation；First generator is connected with first helium gas turbine；Second helium compressor, the second regenerator, the second flue gas helium heat exchanger, the second helium gas turbine, the second regenerator are sequentially passed through from the second helium LNG heat exchangers and forms the second level circulation；Second generator is connected with second helium gas turbine；The electricity generation system of the present invention, it is the helium Closed Brayton Power Cycle electricity generation system of a kind of safe and stable and efficient two grade utility LNG cold energy, the working medium of helium compressor import is cooled to into low-temperature condition using LNG, the circulation warm ratio of Brayton cycle is improved, the efficiency of helium Closed Brayton Power Cycle electricity generation system is effectively lifted.
Description
Technical field
The present invention relates to application of the LNG cold energy in technical field of power generation, more particularly to a kind of two grade utility LNG cold energy
Helium Closed Brayton Power Cycle electricity generation system.
Background technology
With being on the rise for the environmental problem such as haze in recent years, adjusting and optimizing energy resource structure becomes urgent demand.
The energy that natural gas is more cleaned as a kind of relative coal, oil, is given priority in China's energy development Strategic Action Plan
Object, obtained country support energetically.For the ease of storage and long-distance transportation, natural gas in low temperature is cooled to into liquid generally
State, as LNG (liquefied natural gas).At present, China's Coastal Areas build or in the LNG receiving stations for building up to more than 20,
Year import volume is close to 20,000,000 tons.At -162 DEG C or so, needs could supply user after being heated gasification to the storage temperature of LNG
Use, a large amount of high-quality cold energy can be discharged in the process.Traditional gasification process is generally using seawater, air even burner conduct
Thermal source, carries out heating and gasifying using heat exchanger, causes huge cold energy and wastes, and can also be caused come the LNG that gasifies with seawater
Cold pollution to environment, destroys marine ecology.So, if can be used to this part cold energy, huge Jing can be produced
Ji benefit, while being also beneficial to environmental protection.
The generation technology of LNG cold energy uses mainly has following a few classes：Direct expansion method, Rankine cycle method, combined-circulation method
And for improving the power cycle characteristic of Brayton cycle or gas turbine.
LNG is first pressurized by direct expansion method by pump, is then heated with seawater or air, using its pressure energy
Turbine, expansion is directly driven to do manual work and generate electricity.The flow process and equipment needed thereby of the method is very simple, but has only reclaimed the portion of LNG
Partial pressure energy, most of high-quality cold energy are wasted, and organic efficiency is very low.
Using LNG as low-temperature receiver, environment constitutes low temperature Rankine as working medium from appropriate medium as thermal source to Rankine cycle method
Circulation.If working medium selects proper so that the gasification of the evaporation process and LNG of working medium preferably can be matched, then can have
Effect reduces heat transferDamage.It is in hgher efficiency that the method compares direct expansion method, extensively comes into operation at present, technology maturation, and
And can combine with direct expansion method, combined-circulation is constituted, the utilization rate of LNG cold energy is further improved.
For gas turbine, in the peak time of summer electricity consumption, as environment temperature is higher, combustion engine intake air is made
Temperature is raised, and the air capacity sucked under certain pressure ratio is reduced, and leverages exerting oneself for combustion engine.Using LNG cold energy to combustion gas
Turbine inlet air is cooled down, improve dynamical system characteristic, it is to avoid the decline that combustion engine is exerted oneself, and can improve combustion engine efficiency.No
Cross and limited due to the dew point of water vapor in air, inlet air is minimum can only to be cooled to 5 DEG C or so, and improved efficiency is limited, and changes
Hot device is coldLoss is larger.
For Closed Brayton Power Cycle, also using LNG cold energy cooling down compressor inlet working medium, reduce compressor
Wasted work, increase circulation temperature rise ratio, so as to improve cycle efficieny.Cycle fluid can select helium or nitrogen etc., they excellent
Gesture is, its exchanged heat with LNG during all without undergoing phase transition, very low temperature can be cooled to, further increase is followed
Ring temperature rise ratio, with the gasification temperature-rise period of LNG can good match, and can further be reduced by modes such as cascade utilizations
Heat exchangeDamage, improve the utilization ratio of cold energy.
Select in the working medium of Closed Brayton Power Cycle, helium becomes and follows as its specific heat capacity is big, heat exchange property is projected
The ideal chose of ring working medium.Helium Closed Brayton Power Cycle is more suitable for the application of high-temperature field relative to traditional Rankine cycle,
Higher heat to power output efficiency can be realized.And as helium has chemical inertness, unlike steam Rankine cycle has cavitation
Problem, is conducive to the life-span of extension device, reduces system operation maintenance cost.Additionally, the heat exchange property of helium is projected, its heat conduction
Coefficient and specific heat are more than 5 times of air, it means that will reach identical heat exchange amount, will using the equipment size of helium working medium
Greatly reduce so that equipment arrangement more flexibly, is easy to modular development.
The content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of two grade utility LNG cold energy
The working medium of helium compressor import is cooled to low-temperature condition using LNG by helium Closed Brayton Power Cycle electricity generation system, improves cloth
The circulation warm ratio of thunder circulation, effectively lifts the efficiency of helium Closed Brayton Power Cycle electricity generation system.
For achieving the above object and other related purposes, the present invention provides a kind of helium enclosed of two grade utility LNG cold energy
Brayton cycle electricity generation system, the electricity generation system at least include first order circulation, second level circulation, LNG storage tank, voltage regulating station,
Combustion chamber and air preheater；
The first order circulation includes the first helium-LNG heat exchangers, the first helium compressor, the first regenerator, the first cigarette
Gas-helium heat exchanger, the first helium gas turbine, the first generator, the first heating boiler；
First helium compressor, the first regenerator, the first cigarette are sequentially passed through from the first helium-LNG heat exchangers
Gas-helium heat exchanger, the first helium gas turbine, the first regenerator, the first heating boiler form the first order circulation；Described first
Generator is connected with first helium gas turbine；
The second level circulation includes the second helium-LNG heat exchangers, the second helium compressor, the second regenerator, the second cigarette
Gas-helium heat exchanger, the second helium gas turbine, the second generator；
Second helium compressor, the second regenerator, the second cigarette are sequentially passed through from the second helium-LNG heat exchangers
Gas-helium heat exchanger, the second helium gas turbine, the second regenerator form the second level circulation；Second generator with it is described
Second helium gas turbine is connected；
The LNG storage tank is connected with the gas inlet of the second helium-LNG heat exchangers by a LNG pump, and described
The gas outlet of two helium-LNG heat exchangers is connected with the gas inlet of the first helium-LNG heat exchangers, and described first
The gas outlet of helium-LNG heat exchangers is connected to the voltage regulating station；
The gas inlet of the combustion chamber is connected with the voltage regulating station, the air intake of the combustion chamber and the air
The air outlet slit of preheater is connected, and the outlet of the combustion chamber is connected with the smoke inlet of first flue gas-helium heat exchanger,
The exhanst gas outlet of first flue gas-helium heat exchanger is connected with the smoke inlet of second flue gas-helium heat exchanger, described
The exhanst gas outlet of the second flue gas-helium heat exchanger is connected with the smoke inlet of the air preheater.
Preferably, the concrete structure of the first order circulation is：The helium outlet Jing of the first helium-LNG heat exchangers
Cross first helium compressor to be connected with the first helium entrance of first regenerator, the first helium of first regenerator
Gas outlet is connected with the helium entrance of first flue gas-helium heat exchanger, and the helium of first flue gas-helium heat exchanger goes out
Mouth is connected with the helium entrance of first helium gas turbine, and the helium of first helium gas turbine is exported and first regenerator
The second helium entrance be connected, the second helium of first regenerator is exported through first heating boiler and described first
The helium entrance of helium-LNG heat exchangers is connected, and first generator is connected with first helium gas turbine.
Preferably, the concrete structure of the second level circulation is：The helium outlet Jing of the second helium-LNG heat exchangers
Cross second helium compressor to be connected with the first helium entrance of second regenerator, the first helium of second regenerator
Gas outlet is connected with the helium entrance of second flue gas-helium heat exchanger, and the helium of second flue gas-helium heat exchanger goes out
Mouth is connected with the helium entrance of second helium gas turbine, and the helium of second helium gas turbine is exported and second regenerator
The second helium entrance be connected, the helium of the outlet of the second helium of second regenerator and the second helium-LNG heat exchangers
Entrance is connected, and second generator is connected with second helium gas turbine.
Preferably, the second helium of second regenerator exports the helium entrance with the second helium-LNG heat exchangers
Between one second heating boiler can also be set.
Preferably, the temperature of the helium outlet of the second helium-LNG heat exchangers in the circulation of the second level is less than described the
The temperature of the helium outlet of the first helium-LNG heat exchangers in primary cycle.
Preferably, the temperature of the helium outlet of the first flue gas-helium heat exchanger in the first order circulation is higher than described
The temperature of the helium outlet of the second flue gas-helium heat exchanger in the circulation of the second level.
As described above, the helium Closed Brayton Power Cycle electricity generation system of the two grade utility LNG cold energy of the present invention, with following
Beneficial effect：
1st, using LNG cold energy cooling down helium compressor import working medium, solve environment temperature it is higher when, helium turbine goes out
The technical problem that power is reduced, increases circulation warm ratio, and compared with without charge-cooling circulation, the thermal efficiency of first order circulation is carried
High by about 4%, the thermal efficiency of second level circulation improves about 10%, and system effectiveness is obviously improved.
2nd, Closed Brayton Power Cycle helium turbine adopts helium as working medium, the working medium phase with gas turbine or steam turbine
Than, helium can be run under low-temperature condition, the problems such as do not deposit phase transformation at low temperature, and the LNG under supercriticality easily with
The cooling procedure of helium matches.
3rd, cascade utilization is carried out to the LNG cold energy of different temperature sections using two-stage helium-LNG heat exchangers, reduces systemLoss, effectively improves cold energy use rate.
4th, the present invention adopts helium Closed Brayton Power Cycle electricity generation system, and which has simple and compact for structure, floor space little
The features such as, it is easy to be arranged and apply in each LNG receiving station
Description of the drawings
Fig. 1 is the structural representation of the helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy of the present invention.
Component label instructions
1 first order is circulated
11 first helium-LNG heat exchangers
12 first helium compressors
13 first regenerators
First helium entrance of 131 first regenerators
The first helium outlet of 132 first regenerators
Second helium entrance of 133 first regenerators
The second helium outlet of 134 first regenerators
14 first flue gases-helium heat exchanger
15 first helium gas turbines
16 first generators
17 heating boilers
Circulate 2 second level
21 second helium-LNG heat exchangers
22 second helium compressors
23 second regenerators
First helium entrance of 231 second regenerators
The first helium outlet of 232 second regenerators
Second helium entrance of 233 second regenerators
The second helium outlet of 234 second regenerators
24 second flue gases-helium heat exchanger
25 second helium gas turbines
26 second generators
3 LNG storage tanks
4 LNG pumps
5 voltage regulating stations
6 combustion chambers
7 air preheaters
Specific embodiment
Embodiments of the present invention are illustrated below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through concrete realities different in addition
The mode of applying is carried out or applies, the every details in this specification can also based on different viewpoints with application, without departing from
Various modifications and changes are carried out under the spirit of the present invention.
Refer to accompanying drawing.It should be noted that the diagram provided in the present embodiment only illustrates the present invention in a schematic way
Basic conception, only shown in schema with relevant component in the present invention rather than according to component count during actual enforcement, shape then
Shape and size are drawn, and which is actual when the implementing kenel of each component, quantity and ratio can be a kind of random change, and its component cloth
Office's kenel is likely to increasingly complex.
As shown in figure 1, the present invention provides a kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy,
The electricity generation system at least includes first order circulation 1, second level circulation 2, LNG storage tank 3, voltage regulating station 4, combustion chamber 6 and air
Preheater 7.The first order circulation 1 and second level circulation 2 are helium Closed Brayton Power Cycle.
Wherein, the first order circulation includes the first helium-LNG heat exchangers 11, the first helium compressor 12, the first backheat
Device 13, the first flue gas-helium heat exchanger 14, the first helium gas turbine 15, the first generator 16, heating boiler 17；From described first
Helium-LNG heat exchangers 11 sequentially pass through first helium compressor 12, the first regenerator 13, the first flue gas-helium heat exchanger
14th, the first helium gas turbine 15, the first regenerator 13, heating boiler 17 form the first order circulation 1；First generator 16
It is connected with first helium gas turbine 16.
In the first order circulation, the concrete annexation of all parts is：The helium of the first helium-LNG heat exchangers 11
Gas outlet is connected with the first helium entrance 131 of first regenerator 13 through first helium compressor 12, and described the
The first helium outlet 132 of one regenerator 13 is connected with the helium entrance of first flue gas-helium heat exchanger 14, and described first
The helium outlet of flue gas-helium heat exchanger 14 is connected with the helium entrance of first helium gas turbine 15, and first helium is saturating
Flat 16 helium outlet is connected with the second helium entrance 133 of first regenerator 13, the second helium of first regenerator
Gas outlet 134 is connected with the helium entrance of the first helium-LNG heat exchangers 11 through the heating boiler 17, and described first
Generator 16 is connected with first helium gas turbine 15.It is sequentially connected by pipeline between all parts.
The second level circulation 2 includes the second helium-LNG heat exchangers 21, the second helium compressor 22, the second regenerator
23rd, the second flue gas-helium heat exchanger 24, the second helium gas turbine 25, the second generator 26；From the second helium-LNG heat exchangers
21 to sequentially pass through second helium compressor 22, the second regenerator 23, the second flue gas-helium heat exchanger 24, the second helium saturating
Flat 25, second regenerator 23 forms the second level circulation 2；Second generator 26 and 25 phase of the second helium gas turbine
Even.It is sequentially connected by pipeline between all parts.
In the electricity generation system, the LNG storage tank 3 passes through the day of a LNG pump 4 and the second helium-LNG heat exchangers 21
So gas entrance is connected, the gas outlet of the second helium-LNG heat exchangers 21 and the first helium-LNG heat exchangers 11
Gas inlet is connected, and the gas outlet of the first helium-LNG heat exchangers 11 is connected to the voltage regulating station 5.
In addition, in the electricity generation system, the gas inlet of the combustion chamber 6 is connected with the voltage regulating station 5, the burning
The air intake of room 6 is connected with the air outlet slit of the air preheater 7, and the outlet of the combustion chamber 6 and first flue gas-
The smoke inlet of helium heat exchanger 14 is connected, and the exhanst gas outlet of first flue gas-helium heat exchanger 14 and second flue gas-
The smoke inlet of helium heat exchanger 24 is connected, the exhanst gas outlet of second flue gas-helium heat exchanger 24 and the air preheat
The smoke inlet of device 7 is connected.
In the present embodiment, the workflow of the electricity generation system is as follows：
On the one hand, for liquefied natural gas (LNG), first, LNG from the LNG storage tank 3 out afterwards by the LNG pump 4
7MPa (more than the critical pressure of LNG) is pressurized to, to ensure which is in a supercritical state after overheated；Then, LNG is by described the
Second helium-LNG heat exchangers 21 of secondary cycle 2, discharge cold energy, the helium in the second helium-LNG heat exchangers 21 are entered
Row precooling, by the low temperature of helium gas cooling to -50 DEG C, and LNG itself heat absorptions are warmed up to -68.81 DEG C, more than critical-temperature (- 82.3
DEG C), into supercriticality；Afterwards, LNG cools down institute again by the first helium-LNG heat exchangers 11 of first order circulation 1
The helium in the first helium-LNG heat exchangers 11 is stated to -20 DEG C, while self-recovery is to normal temperature, becomes common natural gas；Finally,
By voltage regulating station 5, a part of natural gas is exported by pipeline external user, another part natural gas then transports to combustion chamber 6,
As the fuel of helium Closed Brayton Power Cycle electricity generation system.
On the other hand, for the gas before and after the burning of combustion chamber 6, first, the air needed for combustion chamber 6 comes from the sky
Air preheater 7, is preheated to air using the waste heat of waste gas in air preheater 7, and the air after preheating is sent into combustion then
Burn room 6, and combustion chamber 6 burn produced by high-temperature flue gas first pass through the first flue gas-helium heat exchanger 14, with the first order circulation 1
Helium exchanged heat, the temperature of flue gas from first flue gas-helium heat exchanger, 14 exhanst gas outlet out after now exchanging heat
Still very high, these high-temperature flue gas by the second flue gas-helium heat exchanger 24, are exchanged heat with the helium of second level circulation 2 again,
Last these flue gases are preheated to air by air preheater 7, become waste gas and be discharged in environment after cooling.
Another further aspect, for first order circulation 1, first, the helium of first order circulation 1 is by the first flue gas-helium heat exchange
Device 14 absorbs the heat of flue gas, is heated to 850 DEG C, subsequently into expansion work in the first helium gas turbine 15, drives first
Motor 16 is generated electricity.Helium after doing work from first helium gas turbine 15, then by the first regenerator 13 (from the second helium
Gas entrance 133 enters, the second helium outlet 134 goes out) carry out backheat.Helium temperature still higher (126 DEG C) after backheat, connects
Into heating boiler 17 and being exchanged heat, heating installation or hot water are provided for external user, itself is then cooled to normal temperature.The helium of normal temperature
Again through the first helium-LNG heat exchangers 11, -20 DEG C of low temperature are cooled in advance by LNG.Helium after cooling enters back into the first helium pressure
Mechanism of qi 12 is boosted, subsequently into the first regenerator 13 (entering from the first helium entrance 131, the first helium outlet 132 goes out), quilt
The higher temperatures helium heating that first helium gas turbine 15 is discharged, finally exports 132 helium out from 13 first helium of the first regenerator
Gas absorbs heat in entering back into the first flue gas-helium heat exchanger 14, completes the whole process of first order circulation.
In addition, for second level circulation 2, it is similar that the cyclic process circulates 1 process with the first order.In second level circulation 2
Helium absorbs heat by the second flue gas-helium heat exchanger 24, and temperature is increased to 550 DEG C, subsequently into the second helium gas turbine 25
Middle expansion work, drives the second generator 26 to generate electricity.The helium of the outlet of the second helium gas turbine 25 again by the second regenerator 23 (from
Second helium entrance 233 enters, the second helium outlet 234 goes out) backheat is carried out, enter in subsequently entering the second helium-LNG heat exchangers 21
Row precooling, is cooled to -50 DEG C of low temperature.These low-temperature heliums enter back into the second helium compressor 22 and are compressed boosting, connect
And enter the second regenerator (entering from the first helium entrance 231, the first helium outlet 232 goes out) 23, by the first helium gas turbine 25
Outlet higher temperatures helium heating, finally from 23 first helium of the second regenerator export 232 helium out enter back into the second flue gas-
Heat is absorbed in helium heat exchanger 24, complete the whole process of second level circulation.
It should be noted that in above-described embodiment, for 2 helium-LNG heat exchangers are circulated in first order circulation 1 and the second level
The low-temperature helium of outlet (i.e. helium compressor import), the helium temperature of helium compressor import is lower in theory, the effect of circulation
Rate is higher, however it is necessary that considering construction costs and actual conditions are determined, the parameter being not limited in embodiment.
Also, it should be noted that in above-described embodiment, due to 23 low-pressure end of the second regenerator outlet in second level circulation 2
The helium temperature relatively low (about 65 DEG C) of (the second helium outlet 234), so exchanging heat in the second regenerator 23 and the second helium-LNG
The second heating boiler (diagram) is not added between device 21, in Practical Project, if helium temperature is higher herein, it is also possible to
Heating boiler is added, this portion of energy is made full use of.
As an example, due to the second level circulation 2 and the first order circulation 1 in helium in helium-LNG heat exchangers successively by
LNG is cooled to low-temperature condition, therefore, the temperature of the helium outlet of the second helium-LNG heat exchangers 21 in the second level circulation 2
Temperature of the degree less than the helium outlet of the first helium-LNG heat exchangers 11 in first order circulation 1.
As an example, due to the first order circulation 1 and the second level circulation 2 in helium in flue gas-helium heat exchanger successively
By flue gas to the condition of high temperature, therefore, the helium outlet of the first flue gas-helium heat exchanger 14 in the first order circulation 1
Temperature higher than the second level circulation 2 in the second flue gas-helium heat exchanger 24 helium outlet temperature.
The principle and its effect of above-described embodiment only illustrative present invention, it is of the invention not for limiting.It is any ripe
The personage for knowing this technology all can carry out modifications and changes to above-described embodiment under the spirit and the scope without prejudice to the present invention.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (6)
1. a kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy, it is characterised in that the electricity generation system
At least include first order circulation, second level circulation, LNG storage tank, voltage regulating station, combustion chamber and air preheater；
First order circulation include the first helium-LNG heat exchangers, the first helium compressor, the first regenerator, the first flue gas-
Helium heat exchanger, the first helium gas turbine, the first generator, the first heating boiler；
First helium compressor, the first regenerator, the first flue gas-helium are sequentially passed through from the first helium-LNG heat exchangers
Gas heat exchanger, the first helium gas turbine, the first regenerator, the first heating boiler form the first order circulation；Described first generates electricity
Machine is connected with first helium gas turbine；
Second level circulation include the second helium-LNG heat exchangers, the second helium compressor, the second regenerator, the second flue gas-
Helium heat exchanger, the second helium gas turbine, the second generator；
Second helium compressor, the second regenerator, the second flue gas-helium are sequentially passed through from the second helium-LNG heat exchangers
Gas heat exchanger, the second helium gas turbine, the second regenerator form the second level circulation；Second generator and second helium
Gas turbine is connected；
The LNG storage tank is connected with the gas inlet of the second helium-LNG heat exchangers by a LNG pump, second helium
The gas outlet of gas-LNG heat exchangers is connected with the gas inlet of the first helium-LNG heat exchangers, first helium
The gas outlet of gas-LNG heat exchangers is connected to the voltage regulating station；
The gas inlet of the combustion chamber is connected with the voltage regulating station, the air intake of the combustion chamber and the air preheat
The air outlet slit of device is connected, and the outlet of the combustion chamber is connected with the smoke inlet of first flue gas-helium heat exchanger, described
The exhanst gas outlet of the first flue gas-helium heat exchanger is connected with the smoke inlet of second flue gas-helium heat exchanger, and described second
The exhanst gas outlet of flue gas-helium heat exchanger is connected with the smoke inlet of the air preheater.
2. the helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy according to claim 1, its feature exist
In：The concrete structure of first order circulation is：The helium of the first helium-LNG heat exchangers is exported through first helium
Air pressure mechanism of qi is connected with the first helium entrance of first regenerator, the outlet of the first helium of first regenerator with it is described
The helium entrance of the first flue gas-helium heat exchanger is connected, the helium outlet and described first of first flue gas-helium heat exchanger
The helium entrance of helium gas turbine is connected, and helium outlet and second helium of first regenerator of first helium gas turbine enter
Mouth is connected, and the second helium outlet of first regenerator is exchanged heat with the first helium-LNG through first heating boiler
The helium entrance of device is connected, and first generator is connected with first helium gas turbine.
3. the helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy according to claim 1, its feature exist
In：The concrete structure of second level circulation is：The helium of the second helium-LNG heat exchangers is exported through second helium
Air pressure mechanism of qi is connected with the first helium entrance of second regenerator, the outlet of the first helium of second regenerator with it is described
The helium entrance of the second flue gas-helium heat exchanger is connected, the helium outlet and described second of second flue gas-helium heat exchanger
The helium entrance of helium gas turbine is connected, and helium outlet and second helium of second regenerator of second helium gas turbine enter
Mouth is connected, and the second helium outlet of second regenerator is connected with the helium entrance of the second helium-LNG heat exchangers, institute
State the second generator to be connected with second helium gas turbine.
4. the helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy according to claim 3, its feature exist
In：Can also set between the second helium outlet of second regenerator and the helium entrance of the second helium-LNG heat exchangers
Put one second heating boiler.
5. the helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy according to claim 1, its feature exist
In：The temperature of the helium outlet of the second helium-LNG heat exchangers in the second level circulation is less than in first order circulation
The temperature of the helium outlet of the first helium-LNG heat exchangers.
6. the helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy according to claim 1, its feature exist
In：The temperature of the helium outlet of the first flue gas-helium heat exchanger in the first order circulation is higher than in the circulation of the second level
The second flue gas-helium heat exchanger helium outlet temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611245328.5A CN106545370A (en) | 2016-12-29 | 2016-12-29 | A kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611245328.5A CN106545370A (en) | 2016-12-29 | 2016-12-29 | A kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106545370A true CN106545370A (en) | 2017-03-29 |
Family
ID=58397568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611245328.5A Pending CN106545370A (en) | 2016-12-29 | 2016-12-29 | A kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106545370A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779706A (en) * | 2019-03-13 | 2019-05-21 | 中国科学院上海高等研究院 | A kind of totally-enclosed Brayton cycle heat to power output device |
| CN110185506A (en) * | 2019-05-27 | 2019-08-30 | 西南石油大学 | A kind of natural gas pressure regulating station pressure energy utilization system |
| CN110685757A (en) * | 2019-10-10 | 2020-01-14 | 中南大学 | LNG-based gas turbine-supercritical CO2ORC cycle parallel power generation system |
| CN113982711A (en) * | 2021-11-02 | 2022-01-28 | 中南大学 | Comprehensive power generation system based on LNG-PEMFC-compressed air energy storage-low temperature power circulation |
| CN109944757B (en) * | 2019-04-22 | 2023-08-01 | 西安交通大学 | Solar thermal power generation system applied to space environment and working method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4647847B2 (en) * | 2001-07-10 | 2011-03-09 | 株式会社神戸製鋼所 | Closed cycle gas turbine and power generation system using the same |
| US20140190205A1 (en) * | 2011-06-24 | 2014-07-10 | Marc Bonnissel | Method For Liquefying Natural Gas With A Triple Closed Circuit Of Coolant Gas |
| CN203743849U (en) * | 2014-03-29 | 2014-07-30 | 辽宁石油化工大学 | Device for generating and collecting carbon dioxide (CO2) by utilizing liquefied natural gas cold energy |
| CN104948246A (en) * | 2015-06-18 | 2015-09-30 | 东北大学 | Method for capturing carbon dioxide in mineral smelting waste gas by making use of liquefied natural gas (LNG) cold energy |
| CN105545390A (en) * | 2016-01-25 | 2016-05-04 | 辽宁石油化工大学 | LNG cold energy cascade utilization method |
-
2016
- 2016-12-29 CN CN201611245328.5A patent/CN106545370A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4647847B2 (en) * | 2001-07-10 | 2011-03-09 | 株式会社神戸製鋼所 | Closed cycle gas turbine and power generation system using the same |
| US20140190205A1 (en) * | 2011-06-24 | 2014-07-10 | Marc Bonnissel | Method For Liquefying Natural Gas With A Triple Closed Circuit Of Coolant Gas |
| CN203743849U (en) * | 2014-03-29 | 2014-07-30 | 辽宁石油化工大学 | Device for generating and collecting carbon dioxide (CO2) by utilizing liquefied natural gas cold energy |
| CN104948246A (en) * | 2015-06-18 | 2015-09-30 | 东北大学 | Method for capturing carbon dioxide in mineral smelting waste gas by making use of liquefied natural gas (LNG) cold energy |
| CN105545390A (en) * | 2016-01-25 | 2016-05-04 | 辽宁石油化工大学 | LNG cold energy cascade utilization method |
Non-Patent Citations (1)
| Title |
|---|
| 薛菲尔等: "基于LNG冷能的低温动力循环研究进展", 《制冷学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779706A (en) * | 2019-03-13 | 2019-05-21 | 中国科学院上海高等研究院 | A kind of totally-enclosed Brayton cycle heat to power output device |
| CN109779706B (en) * | 2019-03-13 | 2023-10-27 | 中国科学院上海高等研究院 | Totally-enclosed brayton cycle heat-power conversion device |
| CN109944757B (en) * | 2019-04-22 | 2023-08-01 | 西安交通大学 | Solar thermal power generation system applied to space environment and working method |
| CN110185506A (en) * | 2019-05-27 | 2019-08-30 | 西南石油大学 | A kind of natural gas pressure regulating station pressure energy utilization system |
| CN110685757A (en) * | 2019-10-10 | 2020-01-14 | 中南大学 | LNG-based gas turbine-supercritical CO2ORC cycle parallel power generation system |
| CN113982711A (en) * | 2021-11-02 | 2022-01-28 | 中南大学 | Comprehensive power generation system based on LNG-PEMFC-compressed air energy storage-low temperature power circulation |
| CN113982711B (en) * | 2021-11-02 | 2022-09-16 | 中南大学 | Comprehensive power generation system based on LNG-PEMFC-compressed air energy storage-low temperature power circulation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106837441B (en) | A kind of gas turbine using LNG cold energy-nitrogen Brayton cycle combined generating system | |
| CN106545370A (en) | A kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy | |
| CN201280956Y (en) | Flue gas waste heat recovering and generating set | |
| CN103206317B (en) | Cascaded recycling system for waste heat of internal combustion generating set | |
| CN105258384B (en) | A kind of thermoelectric cold polygenerations systeme of integrated thermochemical process | |
| CN104697239B (en) | A kind of new Organic Rankine Cycle cold, heat and power triple supply system of biomass driving | |
| CN110030770A (en) | A kind of photovoltaic/photo-thermal coupled biological matter distributed energy resource system | |
| CN105605827A (en) | Complementary type distributed energy system integrating internal combustion engine tail gas into thermochemical process | |
| CN102155299A (en) | Combination system of stirling engine and combustion gas turbine utilizing liquefied natural gas | |
| CN104712432A (en) | Two-stage organic Rankine cycle power generation system utilizing exhaust heat of gas turbine | |
| CN108036384A (en) | A kind of energy source station system and operation method based on thermoelectricity unit steam extraction | |
| CN205895337U (en) | Coupled system that pressure energy and cool and thermal power trigeminy supplied | |
| Zheng et al. | Discharging strategy of adiabatic compressed air energy storage system based on variable load and economic analysis | |
| CN203271834U (en) | Britten-steam Rankine-ammonia vapour Rankine combined cycle generating set | |
| CN105927305B (en) | A kind of sintering low temperature waste heat thermoelectric cold multi-generation system | |
| CN204574604U (en) | The novel Organic Rankine Cycle cold, heat and power triple supply system that a kind of living beings drive | |
| CN203756253U (en) | Low-temperature type organic Rankine cycle waste heat power generation system for steel plant | |
| CN207501486U (en) | A kind of domestic freezing heating electricity combined supply system realized natural gas and solar energy and be combined | |
| CN203532054U (en) | Combined circulation system of microturbine based on renewable energy sources | |
| CN103089355B (en) | Steam Rankine-low boiling working fluid Rankine combined cycle generating unit | |
| RU2643878C1 (en) | Method of operation of the compressed-air power station with an absorption lithium bromide refrigerating system (lbrs) | |
| CN206346787U (en) | A kind of helium Closed Brayton Power Cycle electricity generation system of two grade utility LNG cold energy | |
| CN209539413U (en) | A kind of low parameter heat recovery system | |
| CN114934843A (en) | Multi-energy efficient complementary integrated dual-pressure ORC combined cycle power generation system | |
| CN215174935U (en) | High-low temperature heat storage peak shaving system of thermal power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170329 |