CN106870020B - A kind of electricity generation system - Google Patents
A kind of electricity generation system Download PDFInfo
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- CN106870020B CN106870020B CN201710077154.4A CN201710077154A CN106870020B CN 106870020 B CN106870020 B CN 106870020B CN 201710077154 A CN201710077154 A CN 201710077154A CN 106870020 B CN106870020 B CN 106870020B
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- storage medium
- evaporator
- working medium
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Classifications
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- 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
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
Abstract
The present invention relates to a kind of electricity generation system, including high-temperature heat-storage medium reservoirs, low temperature heat-storage medium storage tank, heat-exchanger rig, steam turbine, generator, steam discharge condensing unit；Heat-exchanger rig includes two superheaters, the evaporator and two preheaters of two series connection, high-temperature heat-storage medium reservoirs, superheater, evaporator, preheater and low temperature heat-storage medium storage tank are sequentially connected, form the access of heat-storage medium circulation, it is vented condensing unit, preheater, evaporator, superheater and steam turbine are sequentially connected, form the access of device of working medium circulation, after device of working medium completes heat exchange with high-temperature heat-storage medium in heat-exchanger rig, steam is formed to do work for steam turbine, to drive electrical power generators, the steam of steam turbine discharge enters the condensed water that exhaust condensing unit is formed and enters heat-exchanger rig and high-temperature heat-storage medium progress heat exchange as device of working medium.Compared with prior art, heat-exchanger rig of the invention improves the ability of entire electricity generation system reply failure.
Description
Technical field
The present invention relates to solar energy thermal-power-generating field, more particularly, to a kind of electricity generation system.
Background technology
With the continuous burning of conventional fossil fuel, the available conventional energy resource of the mankind is fewer and fewer, and fossil energy
A large amount of consumptions, destroyed the ecological environment of human survival, serious threat safety and the existence of the mankind.In order to protect people
The ball ecological environment that class is depended on for existence, it is necessary to take measures to reduce the consumption of fossil energy, Devoting Major Efforts To Developing, which utilizes, to be cleaned, is clean
New and renewable energy, walk the road with the green energy resource of ecological environment harmony.
Solar energy is the permanent energy most abundant in the world, and the solar energy total amount that the earth receives every year is 1 × 1018kW
H, this is equivalent to 5 × 1014 barrels of crude oil, is verify crude oil reserve nearly thousand times, is more than 10,000 times of the world year consumption gross energy.
Solar energy thermal-power-generating is one of major way of Solar use, and the solar energy thermal-power-generating station for being equipped with heat reservoir can
To realize that the electric power of continuous-stable exports, especially night continual electric power output.Solar energy thermal-power-generating technology mainly has tower
The technologies schools such as technology, trough technology, dish-style technology, linear Fresnel technology, wherein tower technology has higher focusing ratio,
It can realize higher medium temperature and vapor (steam) temperature, quality of steam is higher.
Wherein, the tower-type solar thermal power generating system comprising heat reservoir refers to heat heat-storage medium using solar energy,
And then realize the heat transfer between heat-storage medium and device of working medium using heat-exchanger rig, and superheated steam is generated, it is final to utilize overheat
Steam drive steam turbine drives generator to produce electricl energy.In the conventional tower-type solar thermal power generating system for including heat reservoir
In, heat-exchanger rig commonly uses single heat-exchanger rig, i.e. an only superheater, an evaporator, a preheater, to realize storage
Heat exchange between thermal medium and device of working medium.It, can be direct using single heat-exchanger rig in the case of a certain system equipment failure
Heat-exchanger rig operation is influenced, entire electricity generation system is caused to be shut down indirectly, power station is caused to be unable to normal power generation, causes a series of damage
It loses.On the other hand, tower type solar energy thermal power generation station often can be because of power grid demand or system operation demand, it is desirable that system underload
It runs, heat-exchanger rig need to coordinate steam turbine to realize that underrun is operated with varying duty at this time, at this time if heat-exchanger rig is single
One heat-exchanger rig, under low loading conditions, heat-exchanger rig will appear the problems such as operational efficiency is low, and heat transfer effect is poor.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of electricity generation system, the hairs
Heat-exchanger rig in electric system is designed and is carried to realize by using two superheaters, two evaporators, two preheater connection in series-parallel
The ability of entire electricity generation system reply failure is risen, while promotes the heat transfer effect of heat-exchanger rig under underload.
The purpose of the present invention can be achieved through the following technical solutions：A kind of electricity generation system, including:
High-temperature heat-storage medium reservoirs, for storing high-temperature heat-storage medium；
Low temperature heat-storage medium storage tank, for storing low temperature heat-storage medium；
Heat-exchanger rig is connect with the high-temperature heat-storage medium reservoirs and low temperature heat-storage medium storage tank, is used to implement high temperature storage
The device of working medium of liquid is converted into superheated steam, while high-temperature heat-storage medium turns by the heat exchange between thermal medium and device of working medium
Become low temperature heat-storage medium；
Steam turbine is connect with the heat-exchanger rig and generator, and generator production is driven under the driving of the superheated steam
Raw electric energy；
Steam discharge condensing unit is connect with the heat-exchanger rig and steam turbine, and the steam that the steam turbine is discharged is condensed into
Water, and further condensed water is imported in heat-exchanger rig and carries out heat friendship as device of working medium and the high-temperature heat-storage medium
It changes, which is characterized in that
The heat-exchanger rig includes：First superheater, the second superheater, the first evaporator, the second evaporator, the first preheating
Device and the second preheater,
The heat-storage medium outlet of the high-temperature heat-storage medium reservoirs is by the first heat-storage medium isocon respectively with described the
The heat-storage medium entrance connection of the heat-storage medium entrance and the second superheater of one superheater, the heat-storage medium of first superheater
Converged by the first heat-storage medium collecting pipe rear and first evaporator in the outlet of the heat-storage medium of outlet and the second superheater
Heat-storage medium entrance connects, and the heat-storage medium outlet of first evaporator passes through heat-storage medium transfer tube and the described second evaporation
Device heat-storage medium entrance connection, second evaporator heat-storage medium outlet by the second heat-storage medium isocon respectively with
The heat-storage medium entrance connection of the heat-storage medium entrance and the second preheater of first preheater, the storage of first preheater
The outlet of the heat-storage medium of thermal medium outlet and the second preheater passes through the second heat-storage medium collecting pipe and the low temperature heat-storage medium
The heat-storage medium entrance connection of storage tank；
The outlet of the steam discharge condensing unit passes through the water conservancy project with first preheater respectively of the first device of working medium isocon
The device of working medium entrance of matter entrance and the second preheater connects, the device of working medium outlet of first preheater and the water of the second preheater
Sender property outlet is connected respectively by pipeline with the device of working medium entrance of first evaporator and the device of working medium entrance of the second evaporator,
The device of working medium outlet of first evaporator and the device of working medium outlet of the second evaporator pass through pipeline and the described first overheat respectively
The device of working medium entrance connection of the device of working medium entrance and the second superheater of device, the device of working medium outlet of first superheater and the second mistake
Hot device device of working medium outlet connected respectively by pipeline with the steam inlet of the steam turbine, the steam (vapor) outlet of the steam turbine and
The entrance connection of the steam discharge condensing unit.
As a kind of improvement of electricity generation system of the present invention, which further includes the first branch pipe, and described first
Branch pipe is equipped with the first valve, and one end of first branch pipe is connected with the first heat-storage medium collecting pipe, described first
The other end of pipe is connected with the heat-storage medium transfer tube, and the height of first evaporator is entered by first valve regulated
Warm heat-storage medium.
As a kind of improvement of electricity generation system of the present invention, which further includes the second branch pipe, and described second
Branch pipe is equipped with the second valve, and one end of second branch pipe is connected with the heat-storage medium transfer tube, second branch pipe
The other end is connected with the second heat-storage medium isocon, and the height of second evaporator is entered by second valve regulated
Warm heat-storage medium.
As a kind of improvement of electricity generation system of the present invention, which further includes the first reheater and second again
Hot device, the steam turbine are reheat steam turbine, and the reheating steam extraction of the steam turbine discharge passes through the 4th device of working medium shunt conduit point
Device of working medium entrance not with first reheater and the second reheater connects, the water of first reheater and the second reheater
Sender property outlet is connected respectively by pipeline with the reheated steam entrance of the steam turbine；
The heat-storage medium outlet of the high-temperature heat-storage medium reservoirs is by third heat-storage medium isocon respectively with described the
The heat-storage medium entrance of one reheater and the second reheater connects, and the heat-storage medium of first reheater and the second reheater goes out
Mouth converges the rear heat-storage medium entrance with first evaporator by third heat-storage medium collecting pipe and connects.
As a kind of improvement of electricity generation system of the present invention, the evaporator is autoclave evaporator, hydrocone type is evaporated
Any one in device or drum separate type evaporator with forced circulation device.
As a kind of improvement of electricity generation system of the present invention, first preheater, the second preheater, the first overheat
Device, the second superheater, the first reheater and the second reheater are hairpin-type heat exchanger.
Compared with prior art, the present invention has the following advantages：
1st, electricity generation system provided by the invention is set using two preheaters, two evaporators and two superheater connection in series-parallel
Meter, when certain device fails in system, can be switched by pipeline, another pair with identical function of increase
The operating load of equipment is answered, so as to ensure that electricity generation system does not have to shut down, and then is reduced economical caused by electricity generation system is shut down
Loss.
2nd, in the heat-exchanger rig of the present invention, on the one hand, two evaporators are in parallel in device of working medium side, i.e., from two preheatings
It is shunted again respectively after the device of working medium confluence mixing flowed out in device while enters the first evaporator and the second evaporator, that is, water conservancy project
The device of working medium temperature that matter side enters in the first evaporator and the second evaporator is identical, and on the other hand, two evaporators are in heat accumulation
Media side is connected, i.e., the heat-storage medium flowed out from two superheaters passes through the first evaporator and the second evaporator successively,
It is exactly that the heat-storage medium temperature that heat-storage medium side enters in the first evaporator is higher than into heat accumulation Jie in the second evaporator
The temperature of matter.The temperature difference itself born by an equipment is made using this kind design, becomes to be born by two equipment, is born in equipment
The temperature difference reduced, so as to reduce the thermal (temperature difference) stress of equipment.For example, due to heat-storage medium pass through in the first evaporator with water
Working medium exchanges heat, and temperature reduces so that and the temperature difference in the second evaporator between device of working medium and heat-storage medium is reduced, so as to
Enough reduce in the second evaporator tube side and shell side because of the thermal stress suffered by temperature differencies.Therefore, design using the present invention,
Under the premise of evaporator section can realize identical heat exchange efficiency output, the evaporator Duan Yudan that is made of two evaporator series
The evaporator section that an only evaporator is formed is compared, the former can be substantially reduced the thermal stress suffered by evaporator, so as to
Extend the service life of heat-exchanger rig.
3rd, heat-storage medium is for device of working medium, and often storage density is relatively low for medium sensible heat, this results in heat-storage medium
With device of working medium heat transfer process, the flow of heat-storage medium is often much larger than the flow of device of working medium, then may be because such as using single equipment
It is larger for heat-storage medium flow, cause heat-storage medium flow resistance too big, so as to be increased in heat-exchanger rig convey heat-storage medium and
The electric energy of consumption so that power generation station service increases, that is, increases cost of electricity-generating.Using the design of the technical program, preheating
Device, superheater mode in parallel, under the premise of similary generated output is reached, may be such that the flow of wherein every equipment obtains
It reduces, that is, reduces flow resistance of the heat-storage medium in heat-exchanger rig, reduce power generation station service, reduce cost of electricity-generating.
Description of the drawings
Fig. 1 is the theory structure block diagram of electricity generation system of the present invention.
Fig. 2 is a kind of structure chart of electricity generation system of the present invention.
Fig. 3 is the structure chart of another electricity generation system of the present invention.
It is identified as in figure：1- low temperature heat-storage medium storage tanks, 2- high-temperature heat-storage medium reservoirs, the first superheaters of 3-, 4- second
Superheater, the first evaporators of 5-, the second evaporators of 6-, the first preheaters of 7-, the second preheaters of 8-, 9- steam turbines, 10- power generations
Machine, 11- steam discharge condensing units, 12- the first heat-storage medium isocons, 13- third device of working medium collecting pipes, the first heat-storage mediums of 14-
Collecting pipe, 15- third device of working medium isocons, 16- the second device of working medium collecting pipes, 17- the second device of working medium isocons, 18- heat accumulations are situated between
Matter transfer tube, the second branch pipes of 19-, 20- the second heat-storage medium isocons, the first device of working medium of 21- collecting pipe, the first device of working medium of 22-
Isocon, 23- the second heat-storage medium collecting pipes, the first branch pipes of 24-, the first valves of 25-, the first reheaters of 26-, 27- second is again
Hot device, 28- third heat-storage medium isocons, 29- third heat-storage medium collecting pipes, the 4th device of working medium collecting pipes of 30-, 31- the 4th
Device of working medium isocon.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
As shown in Figure 1, a kind of electricity generation system provided in an embodiment of the present invention, including:High-temperature heat-storage medium reservoirs 2：For
Store high-temperature heat-storage medium；Low temperature heat-storage medium storage tank 1：For storing low temperature heat-storage medium；Heat-exchanger rig：It is used to implement heat accumulation
The device of working medium of liquid is converted into superheated steam by the heat exchange between medium and device of working medium；Steam turbine 9：In superheated steam
The lower drive generator 10 of driving produces electricl energy；Steam discharge condensing unit 11：The steam that steam turbine 9 is discharged is condensed into water, goes forward side by side one
Condensed water is imported in heat-exchanger rig and exchanged heat as device of working medium and heat-storage medium by step.
Specifically, as shown in Fig. 2, heat-exchanger rig include the first superheater 3, the second superheater 4, the first evaporator 5, second
Evaporator 6, the first preheater 7 and the second preheater 8, the heat-storage medium outlet of high-temperature heat-storage medium reservoirs 2 pass through the first storage
Heat-storage medium entrance of the thermal medium isocon 12 respectively with the heat-storage medium entrance of the first superheater 3 and the second superheater 4 connects,
The heat-storage medium outlet of first superheater 3 and the heat-storage medium outlet of the second superheater 4 pass through the first heat-storage medium collecting pipe 14
Converge the heat-storage medium entrance afterwards with the first evaporator 5 to connect, the heat-storage medium outlet of the first evaporator 5 is passed by heat-storage medium
Defeated pipe 18 is connected with the heat-storage medium entrance of the second evaporator 6, and the heat-storage medium outlet of the second evaporator 6 is situated between by the second heat accumulation
Heat-storage medium entrance of the matter isocon 20 respectively with the heat-storage medium entrance of the first preheater 7 and the second preheater 8 connects, and first
Preheater 7 heat-storage medium outlet and the second preheater 8 heat-storage medium outlet pass through the second heat-storage medium collecting pipe 23 with it is low
The heat-storage medium entrance connection of warm heat-storage medium storage tank 1；
Further, the outlet of steam discharge condensing unit 11 by the first device of working medium isocon 22 respectively with the first preheater 7
Device of working medium entrance and the second preheater 8 device of working medium entrance connection, the first preheater 7 device of working medium outlet and the second preheater
8 device of working medium outlet is connected respectively by the device of working medium entrance of the device of working medium entrance and the second evaporator 6 of pipeline and the first evaporator 5
Lead to (it should be noted that the device of working medium outlet of the first preheater 7 and the device of working medium outlet of the second preheater 8 can also pass through first
After device of working medium collecting pipe 21 converges, then pass through the second device of working medium isocon 17 and 5 device of working medium entrance of the first evaporator and the second steaming
Send out the connection of 6 device of working medium entrance of device), the device of working medium outlet of the first evaporator 5 and the device of working medium outlet of the second evaporator 6 pass through respectively
Pipeline is connected with the device of working medium entrance of the first superheater 3 and the device of working medium entrance of the second superheater 4 (it should be noted that first
After the device of working medium outlet of evaporator 5 and the device of working medium outlet of the second evaporator 6 can also be converged by the second device of working medium collecting pipe 16,
Connected again by the device of working medium entrance of the device of working medium entrance and the second superheater 4 of third device of working medium isocon 15 and the first superheater 3
It is logical), the device of working medium outlet of the first superheater 3 and the device of working medium outlet of the second superheater 4 pass through the steaming of pipeline and steam turbine 9 respectively
Vapour entrance connects or the device of working medium of the outlet of the device of working medium of the first superheater 3 and the second superheater 4 is exported through third device of working medium
The steam inlet that collecting pipe 13 converges afterwards with steam turbine 9 connects, the steam (vapor) outlet of steam turbine 9 and the entrance of steam discharge condensing unit 11
Connection.
Heat-exchanger rig provided by the invention is designed using two preheaters, two evaporators and two superheater connection in series-parallel,
When certain device fails in system, it can be switched by pipeline, another correspondence with identical function of increase
The operating load of equipment so as to ensure that electricity generation system does not have to shut down, and then reduces the economic damage caused by electricity generation system is shut down
It loses.
The present invention can also be used outside water working substance supply device (not shown) and provide device of working medium, outside water working substance supply
Device is connect with the device of working medium entrance of the first preheater 7 and the device of working medium entrance of the second preheater 8.
As shown in Figure 1, in one embodiment of the invention, which further includes the first branch pipe 24, is set on the first branch pipe 24
Have the first valve 25, one end of the first branch pipe 24 is connected with the first heat-storage medium collecting pipe 14, the other end of the first branch pipe 24 with
Heat-storage medium transfer tube 18 connects, and the high-temperature heat-storage medium of the first evaporator 5 is entered by 25 flexible modulation of the first valve.
As shown in Figure 1, in one embodiment of the invention, which further includes the second branch pipe 19, is set on the second branch pipe 19
There is the second valve, one end of the second branch pipe 19 is connected with heat-storage medium transfer tube 18, the other end of the second branch pipe 19 and the second storage
Thermal medium isocon 20 connects, and the high-temperature heat-storage medium of the second evaporator 6 is entered by the second valve regulated.
In one embodiment of the invention, evaporator is autoclave evaporator, hydrocone type evaporator or the vapour with forced circulation device
Any one in packet separate type evaporator.Certainly, it is alternatively chosn to the evaporator of other forms.
In one embodiment of the invention, the first preheater 7, the second preheater 8, the first superheater 3, the second superheater 4 is
Hairpin-type heat exchanger.Certainly, the present invention is not limited thereto, may be selected to be other form heat exchangers, the first preheater 7, and
Two preheaters 8, the first superheater 3, the second superheater 4 also can be different.
Embodiment 2
As shown in figure 3, electricity generation system provided in this embodiment is as embodiment 1, the difference is that：The present embodiment
Electricity generation system further include the first reheater 26 and the second reheater 27, steam turbine 9 is reheat steam turbine 9, including at least one
Low pressure (LP) cylinder and a high pressure cylinder, low pressure (LP) cylinder discharge low-pressure steam by the 4th device of working medium isocon 31 respectively with the first reheating
Device 26 is connected with the device of working medium entrance of the second reheater 27, the device of working medium outlet difference of the first reheater 26 and the second reheater 27
It is met at after the 4th device of working medium collecting pipe 30 by pipeline and is connected with the steam inlet of steam turbine 9；
High-temperature heat-storage medium reservoirs 2 heat-storage medium outlet by third heat-storage medium isocon 28 respectively with the first reheating
Device 26 is connected with the heat-storage medium entrance of the second reheater 27, the heat-storage medium outlet of the first reheater 26 and the second reheater 27
The heat-storage medium entrance converged by third heat-storage medium collecting pipe 29 afterwards with the first evaporator 5 connects.
To sum up, in the heat-exchanger rig of the present invention, on the one hand, two evaporators are in parallel in device of working medium side, i.e., from two
It is shunted again respectively after the device of working medium confluence mixing flowed out in preheater while enters the first evaporator 5 and the second evaporator 6, also
It is that device of working medium side is identical with the device of working medium temperature in the second evaporator 6 into the first evaporator 5, on the other hand, two evaporations
Device is connected in heat-storage medium side, i.e., the heat-storage medium flowed out from two superheaters passes through the first evaporator 5 and second successively
Evaporator 6, that is, the heat-storage medium temperature that heat-storage medium side enters in the first evaporator 5 are higher than into the second evaporator
The temperature of heat-storage medium in 6.The temperature difference itself born by an equipment is made using this kind design, is become to be held by two equipment
By the temperature difference born in equipment is reduced, so as to reduce the thermal (temperature difference) stress of equipment.For example, since heat-storage medium passes through the
It exchanges heat in one evaporator 5 with device of working medium, temperature reduces so that the temperature in the second evaporator 6 between device of working medium and heat-storage medium
Difference is reduced, so as to reduce in the second evaporator 6 tube side and shell side because of the thermal stress suffered by temperature differencies.Therefore,
Design using the present invention, under the premise of identical heat exchange efficiency output can be realized in evaporator section, by two evaporator strings
Join the evaporator section of composition compared with the evaporator section that an independent evaporator is formed, the former can be substantially reduced suffered by evaporator
The thermal stress arrived, so as to extend the service life of heat-exchanger rig.
Heat-storage medium is for device of working medium, and medium sensible heat and storage density are often relatively low, this results in heat-storage medium
With device of working medium heat transfer process, the flow of heat-storage medium is often much larger than the flow of device of working medium, then may be because such as using single equipment
It is larger for heat-storage medium flow, cause heat-storage medium flow resistance too big, so as to be increased in heat-exchanger rig convey heat-storage medium and
The electric energy of consumption so that power generation station service increases, that is, increases cost of electricity-generating.Using the design of the technical program, preheating
Device, superheater mode in parallel, under the premise of similary generated output is reached, may be such that the flow of wherein every equipment obtains
It reduces, that is, reduces flow resistance of the heat-storage medium in heat-exchanger rig, reduce power generation station service, reduce cost of electricity-generating.
Although the present invention illustrates above example, but it is to be understood that this is not meant to that the present invention will limitation
In above example.On the contrary, the present invention will be including may be embodied in the essence of the present invention being defined by the appended claims
All replacements in god and range, change and equivalent program.
Claims (6)
1. a kind of electricity generation system, including:
High-temperature heat-storage medium reservoirs, for storing high-temperature heat-storage medium；
Low temperature heat-storage medium storage tank, for storing low temperature heat-storage medium；
Heat-exchanger rig is connect with the high-temperature heat-storage medium reservoirs and low temperature heat-storage medium storage tank, is used to implement high-temperature heat-storage Jie
The device of working medium of liquid is converted into superheated steam, while high-temperature heat-storage medium is changed by the heat exchange between matter and device of working medium
Low temperature heat-storage medium；
Steam turbine is connect with the heat-exchanger rig and generator, generator is driven to generate electricity under the driving of the superheated steam
Energy；
Steam discharge condensing unit is connect with the heat-exchanger rig and steam turbine, and the steam that the steam turbine is discharged is condensed into water, and
Further condensed water is imported in heat-exchanger rig and carries out heat exchange as device of working medium and the high-temperature heat-storage medium, it is special
Sign is,
The heat-exchanger rig includes：First superheater, the second superheater, the first evaporator, the second evaporator, the first preheater with
And second preheater,
The high-temperature heat-storage medium reservoirs heat-storage medium outlet by the first heat-storage medium isocon respectively with first mistake
The heat-storage medium entrance connection of the heat-storage medium entrance and the second superheater of hot device, the heat-storage medium outlet of first superheater
Heat-storage medium outlet with the second superheater rear and first evaporator heat accumulation is converged by the first heat-storage medium collecting pipe
Medium inlet connects, and the heat-storage medium outlet of first evaporator passes through heat-storage medium transfer tube and second evaporator
Heat-storage medium entrance connects, the outlet of the heat-storage medium of second evaporator by the second heat-storage medium isocon respectively with it is described
The heat-storage medium entrance connection of the heat-storage medium entrance and the second preheater of first preheater, the heat accumulation of first preheater are situated between
Matter exports and the outlet of the heat-storage medium of the second preheater passes through the second heat-storage medium collecting pipe and the low temperature heat-storage medium storage tank
Heat-storage medium entrance connection；
The outlet of the steam discharge condensing unit is entered by device of working medium of the first device of working medium isocon respectively with first preheater
Mouth is connected with the device of working medium entrance of the second preheater, the device of working medium outlet of first preheater and the device of working medium of the second preheater
Outlet is connected respectively by pipeline with the device of working medium entrance of first evaporator and the device of working medium entrance of the second evaporator, described
The device of working medium outlet of first evaporator and the device of working medium outlet of the second evaporator pass through pipeline and first superheater respectively
The device of working medium entrance of device of working medium entrance and the second superheater connects, the device of working medium outlet of first superheater and the second superheater
Device of working medium outlet connected respectively by pipeline with the steam inlet of the steam turbine, the steam (vapor) outlet of the steam turbine with it is described
The entrance connection of steam discharge condensing unit.
2. a kind of electricity generation system as described in claim 1, which is characterized in that the electricity generation system further includes the first branch pipe, described
First branch pipe is equipped with the first valve, and one end of first branch pipe connects with the first heat-storage medium collecting pipe, and described the
The other end of one branch pipe is connected with the heat-storage medium transfer tube, enters first evaporator by first valve regulated
High-temperature heat-storage medium.
3. a kind of electricity generation system as described in claim 1, which is characterized in that the electricity generation system further includes the second branch pipe, described
Second branch pipe is equipped with the second valve, and one end of second branch pipe is connected with the heat-storage medium transfer tube, described second
The other end of pipe is connected with the second heat-storage medium isocon, enters second evaporator by second valve regulated
High-temperature heat-storage medium.
4. a kind of electricity generation system as described in claim 1, which is characterized in that the electricity generation system further includes the first reheater and the
Two reheaters, the steam turbine are reheat steam turbine, and the reheating steam extraction of the steam turbine discharge passes through the 4th device of working medium isocon
Device of working medium entrance of the road respectively with first reheater and the second reheater connects, first reheater and the second reheater
Device of working medium outlet connected respectively by pipeline with the reheated steam entrance of the steam turbine；
The high-temperature heat-storage medium reservoirs heat-storage medium outlet by third heat-storage medium isocon respectively with described first again
The heat-storage medium entrance of hot device and the second reheater connects, and the heat-storage medium outlet of first reheater and the second reheater is logical
It crosses third heat-storage medium collecting pipe and converges the rear heat-storage medium entrance with first evaporator and connect.
5. a kind of electricity generation system according to claim 1, which is characterized in that first evaporator and the second evaporator are equal
For any one in autoclave evaporator, hydrocone type evaporator or drum separate type evaporator with forced circulation device.
6. a kind of electricity generation system according to claim 1, which is characterized in that first preheater, the second preheater, the
One superheater, the second superheater, the first reheater and the second reheater are hairpin-type heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077154.4A CN106870020B (en) | 2017-02-13 | 2017-02-13 | A kind of electricity generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077154.4A CN106870020B (en) | 2017-02-13 | 2017-02-13 | A kind of electricity generation system |
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