A kind of heat-exchange system for possessing Load Regulation function
Technical field
The present invention relates to solar energy thermal-power-generating field, more particularly to a kind of heat-exchange system for possessing Load Regulation function.
Background technology
With the continuous consumption of fossil fuel, lack of energy problem getting worse.In addition, a large amount of consumptions of fossil energy,
The living environment of the mankind is constantly being destroyed, serious threat existence and the safety of the mankind.Solar energy is as a kind of renewable
Green energy resource, have the characteristics that " inexhaustible ".Solar energy thermal-power-generating is as one kind side in Solar use
Formula, can ensure stable electric power output, and possess the ability for adjusting of avoiding the peak hour, and be with a wide range of applications.
Mainly there are tower technology and trough technology using more solar energy thermal-power-generating technology at present, wherein for heat absorption
Medium is mainly fused salt and conduction oil.However, the either tower technology of fused salt or conduction oil trough technology, wherein unavoidably
The heat exchange for using heat-absorbing medium and water/steam, this then needs a set of heat-exchange system for solar energy thermal-power-generating.
Tower-type solar thermal power generating system in actual application, it is necessary to there is stronger Load Regulation ability, it is tower too
When positive energy heat generating system needs to export larger electrical power, it is desirable to which heat-exchange system can export larger load, in tower type solar
Heat generating system needs to export less load, and requires heat-exchange system to export compared with Smaller load, this just needs heat-exchange system
Possess flexible regulating power, carried out in the prior art only with the device of working medium in single high-temperature heat-storage medium exchange hot systems
Heat, the superheated steam load constant produced in heat-exchange system, when needing to adjust load, burden requirement work can not be exchanged in time
Go out response.
The content of the invention
For problem present in background technology, this application provides a kind of heat-exchange system for possessing Load Regulation function,
It has flexible tune load-bearing capacity, can respond in time to the requirement of the Load Regulation of electricity generation system.
In order to reach foregoing invention purpose, technical solution is as follows used by solving its technical problem:
A kind of heat-exchange system for possessing Load Regulation function, including the first high-temperature heat-storage medium delivery pipe road, preheater, steaming
Send out device, superheater, waterworks, steam turbine and the second valve:
The first high-temperature heat-storage medium delivery pipe road is connected with the heat-storage medium entrance on the superheater, the overheat
Heat-storage medium outlet on device is connected by the first pipeline with the heat-storage medium entrance on the evaporator, on the evaporator
Heat-storage medium outlet is connected by second pipe with the heat-storage medium entrance on the preheater, and the heat accumulation on the preheater is situated between
Matter outlet heat-storage medium is discharged by heat-exchange system by the 3rd pipeline;
The waterworks are connected by the 4th pipeline with the device of working medium entrance on the preheater, on the preheater
Device of working medium outlet is connected by the 5th pipeline with the device of working medium entrance on the evaporator, the device of working medium outlet on the evaporator
Connected by the 6th pipeline with the device of working medium entrance on the superheater, the device of working medium outlet on the superheater passes through the 7th pipe
Road is connected with the steam turbine;
Second valve is arranged on the 9th pipeline, the both ends of the 9th pipeline respectively with the 4th pipeline and
Five pipelines connect.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the heat-exchange system also wraps
Include the first valve, first valve is arranged on the 8th pipeline, the both ends of the 8th pipeline respectively with first pipeline
Connected with second pipe.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the heat-exchange system also wraps
The second high-temperature heat-storage medium delivery pipe road is included, the second high-temperature heat-storage medium delivery pipe road is connected with the first pipeline.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the heat-exchange system also wraps
The first low temperature heat-storage medium conveyance conduit is included, the first low temperature heat-storage medium conveyance conduit is situated between with the heat accumulation on the superheater
Matter entrance connects.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the preheater, evaporation
Device and superheater are shell-and-tube heat exchanger, wherein:
The heat-storage medium flows in the shell side of the preheater and superheater, the device of working medium in the preheater and
Flowed in the tube side of superheater;
The heat-storage medium flows in the tube side of the evaporator, and the device of working medium flows in the shell side of the evaporator
It is dynamic.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the preheater, evaporation
At least one in device and superheater is U-tube shell heat exchanger.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the evaporator includes U
Shape shell-and-tube heat exchanger and the drum being arranged above U-tube shell heat exchanger, wherein:
The drum is connected by least one down-comer with the shell side of the U-tube shell heat exchanger, and by least
One tedge is connected with the shell side of the U-tube shell heat exchanger;
The abutment of the down-comer and the shell side of the U-tube shell heat exchanger is less than the tedge and the U-shaped
The abutment of the shell side of shell-and-tube heat exchanger.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the down-comer with it is described
The abutment of the shell side of U-tube shell heat exchanger is arranged at the bottom of the shell side of the U-tube shell heat exchanger, the tedge
The top of the shell side of the U-tube shell heat exchanger is arranged at the abutment of the shell side of the U-tube shell heat exchanger.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the down-comer passes through
The shell side of one isocon and the second isocon respectively with the U-tube shell heat exchanger connects, first isocon and second
The abutment of isocon and the shell side of the U-tube shell heat exchanger is below the tedge and the U-shaped pipe shell type heat exchange
The abutment of the shell side of device.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the water on the evaporator
Working medium entrances and device of working medium outlet are respectively arranged on the drum, and the height of the device of working medium entrance on the evaporator is less than
The height of device of working medium outlet on the evaporator.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the water on the evaporator
Sender property outlet is arranged at the top of the drum.
Relative to the prior art, beneficial effects of the present invention are:
1st, the present invention is by setting the first high-temperature heat-storage medium delivery pipe road and the first low temperature heat-storage medium conveyance conduit, energy
It is enough that the temperature of heat-storage medium is adjusted before heat-storage medium enters superheater, so as to achieve the purpose that to adjust heat-exchange system load;
2nd, the present invention is by setting the second high-temperature heat-storage medium delivery pipe road, when the heat-storage medium from superheater is by changing
After heat temperature reduce, when being insufficient for the burden requirement of heat-exchange system, can by the second high-temperature heat-storage medium delivery pipe road to
Evaporator supplements high-temperature heat-storage medium, the temperature for entering the heat-storage medium in evaporator is improved, so as to reach raising heat-exchange system
The purpose of load;
3rd, the present invention is connected the first pipeline with second pipe using the 8th pipeline, and sets first on the 8th pipeline
Valve, when needing to turn down load of the heat-exchange system at evaporator, can open the first valve, make the heat accumulation from superheater
Medium is shunted, and is partly into evaporator, and a part is directly entered preheater, so that being situated between into the heat accumulation in evaporator
The amount of matter is reduced, so as to achieve the purpose that to adjust heat-exchange system load;
4th, the present invention is connected the 4th pipeline and the 5th pipeline using the 9th pipeline, and sets second on the 9th pipeline
Valve, when needing to turn down the load of heat-exchange system, can open the second valve, be divided the device of working medium from preheater
Stream, is partly into evaporator, and a part comes back to preheater, so that the amount into the device of working medium in evaporator is reduced,
So as to achieve the purpose that to adjust heat-exchange system load.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described.It is clear that drawings in the following description are only some embodiments of the present invention, for ability
For field technique personnel, without creative efforts, other attached drawings can also be obtained according to these attached drawings.It is attached
In figure:
Fig. 1 is a kind of overall structure diagram for the heat-exchange system for possessing Load Regulation function of the present invention;
Fig. 2 is a kind of evaporator schematic cross-section for the heat-exchange system for possessing Load Regulation function of the present invention.
【Primary symbols explanation】
1- preheaters, 2- superheaters, 3- evaporators, 4- the first high-temperature heat-storage medium delivery pipes road, 5- the first low temperature heat accumulations
Medium delivery pipe road, the 7th pipelines of 6-, the 6th pipelines of 7-, 8- the second high-temperature heat-storage medium delivery pipes road, the first pipelines of 9-, 10-
8th pipeline, the first valves of 11-, 12- second pipes, the 5th pipelines of 13-, the 4th pipelines of 14-, 15- waterworks, 16- the 9th
Pipeline, the second valves of 17-, the 3rd pipelines of 18-, the outlet of 19- evaporators device of working medium, 20- drums, 21- evaporator device of working medium entrances,
22- tedges, 23- evaporator tube sides, 24- connecting flanges, 25- bobbin carriages, 26- down-comers, the first isocons of 27-, 28- second divide
Flow tube, 29- arc pipe portions.
Embodiment
Below with reference to the attached drawing of the present invention, clear, complete description is carried out to the technical solution in the embodiment of the present invention
And discussion, it is clear that as described herein is only a part of example of the present invention, is not whole examples, based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example, belongs to protection scope of the present invention.
In one embodiment of this invention, as shown in Figure 1, including the first high-temperature heat-storage medium delivery pipe road 4, preheater 1,
Evaporator 3, superheater 2, waterworks 15, steam turbine and the second valve 17.
The first high-temperature heat-storage medium delivery pipe road 4 is connected with the heat-storage medium entrance on the superheater 2, the mistake
Heat-storage medium outlet on hot device 2 is connected by the first pipeline 9 with the heat-storage medium entrance on the evaporator 3, the evaporation
Heat-storage medium outlet on device 3 is connected by second pipe 12 with the heat-storage medium entrance on the preheater 1, the preheater
Heat-storage medium outlet on 1 heat-storage medium is discharged to low temperature heat-storage medium storage tank by heat-exchange system by the 3rd pipeline 18;
The waterworks 15 are connected by the 4th pipeline 14 with the device of working medium entrance on the preheater 1, the preheating
Device of working medium outlet on device 1 is connected by the 5th pipeline 13 with the device of working medium entrance on the evaporator 3, on the evaporator 3
Device of working medium outlet connected by the 6th pipeline 7 with the device of working medium entrance on the superheater 2, the water conservancy project on the superheater 2
Matter outlet is connected by the 7th pipeline 6 with the steam turbine;
Second valve 17 is arranged on the 9th pipeline 16, and the both ends of the 9th pipeline 16 are managed with the described 4th respectively
Road 14 is connected with the 5th pipeline 13.Using such a design, when needing to turn down the load of heat-exchange system, the second valve can be opened
17, the device of working medium from preheater 1 is shunted, is partly into evaporator 3, a part comes back to preheater 1, so that
Reduce the amount for entering the device of working medium in evaporator 3, so as to achieve the purpose that to adjust heat-exchange system load.
In another embodiment of the invention, the heat-exchange system further includes first valve 11, first valve
11 are arranged on the 8th pipeline 10, and the both ends of the 8th pipeline 10 are connected with first pipeline 9 and second pipe 12 respectively.
Using such a design, when needing to turn down load of the heat-exchange system at evaporator 3, the first valve 11 can be opened, makes to come from
The heat-storage medium of superheater 2 is shunted, and is partly into evaporator 3, and a part is directly entered preheater 1, so that into
The amount of heat-storage medium in evaporator 3 is reduced, so as to achieve the purpose that to adjust heat-exchange system load.
As a kind of improvement for the heat-exchange system for possessing Load Regulation function of the present invention, the heat-exchange system also wraps
The second high-temperature heat-storage medium delivery pipe road 8 is included, the second high-temperature heat-storage medium delivery pipe road 8 is connected with the first pipeline 9.Pass through
Second high-temperature heat-storage medium delivery pipe road 8 is set, and when the heat-storage medium from superheater 2, temperature reduces after heat exchange, deficiency
During meeting the burden requirement of heat-exchange system, high temperature can be supplemented to evaporator 3 by the second high-temperature heat-storage medium delivery pipe road 9 and stored up
Thermal medium, improves the temperature for entering the heat-storage medium in evaporator 3, so as to achieve the purpose that to improve heat-exchange system load.
In another embodiment of the invention, the heat-exchange system further includes the first low temperature heat-storage medium conveyance conduit 5, institute
The first low temperature heat-storage medium conveyance conduit 5 is stated to connect with the heat-storage medium entrance on the superheater 2.
In another embodiment of the invention, the preheater 1, evaporator 3, superheater 2 are shell-and-tube heat exchanger, its
In, the heat-storage medium flows in the shell side of the preheater 1 and superheater 2, and the device of working medium is in the preheater 1 and mistake
Flowed in the tube side of hot device 2;The heat-storage medium flows in the tube side of the evaporator 3, and the device of working medium is in the evaporation
Flowed in the shell side of device 3.Using such a design, when device of working medium walks shell side at evaporator 3, it is possible to achieve blowdown, prevents from steaming
Send out water scale effect heat transfer effect in device 3.
In another embodiment of the invention, at least one in the preheater 1, evaporator 3, superheater 2 is U-tube
Shell heat exchanger.Using U-tube shell heat exchanger so that device of working medium flow velocity is very fast, and varying duty regulating power is stronger.
As shown in Fig. 2, in another embodiment of the invention, the evaporator 3 includes U-tube shell heat exchanger and setting
Drum 20 above U-tube shell heat exchanger, the drum 20 are changed by least one down-comer 26 and the U-tube shell-type
The shell side connection of hot device, and connected by least one tedge 22 with the shell side of the U-tube shell heat exchanger.Also, institute
Down-comer 26 is stated with the abutment of the shell side of the U-tube shell heat exchanger less than the tedge 22 and the U-tube shell-type
The abutment of the shell side of heat exchanger.
Device of working medium entrance 21 and device of working medium outlet 19 on the evaporator 3 are respectively arranged on the drum 20, also,
Height of the height of device of working medium entrance 21 on the evaporator 3 less than the device of working medium outlet 19 on the evaporator 3.Specifically
Ground, in the present embodiment, 26 bottom of down-comer are shunted by the first isocon 27 and the second isocon 28, the first isocon
27 one end are connected with down-comer 26, and other end is connected with the shell side of U-tube shell heat exchanger, and 27 one end of the second isocon is with
Drop pipe 26 connects, and other end is connected with the shell side of U-tube shell heat exchanger.Also, in the present embodiment, U-tube shell-type changes
Hot device includes arc pipe portion 29 and two straight sections integrally connected with 29 two ports of arc pipe portion, and two straight sections are away from institute
The one end for stating arc pipe portion 29 is each provided with a connecting flange 24 being fixedly connected with extension tube attached;The front end of two straight sections is also
A bobbin carriage 25 is respectively arranged with, tube side 23 of two bobbin carriages 25 respectively with the U-shaped heat exchanger connects, outer for that will come from
The fluid of adapter is introduced in tube side 23.The evaporator 3 of the present invention sets drum 20 using at the top of U-tube shell heat exchanger
Design, the flow velocity of one side U-tube shell heat exchanger is very fast, and varying duty regulating power is stronger, is on the other hand provided with drum again
20, it can ensure that heat-exchange system has stronger antijamming capability.
In another embodiment of the invention, the device of working medium outlet 19 on the evaporator 3 is arranged at the top of drum 20.Into
Enter after the device of working medium in evaporator 3 exchanges heat in evaporator 3, be changed into saturated vapor, device of working medium is deposited in the form of a vapor at this time
By the way that the device of working medium outlet 19 on evaporator 3 is arranged at the top of drum 20, entering superheater 2 easy to gaseous device of working medium
It is further heated.
In another embodiment of the invention, the engagement of the down-comer 26 and the shell side of the U-tube shell heat exchanger
Point is arranged at the bottom of the shell side of the U-tube shell heat exchanger, the shell of the tedge 22 and the U-tube shell heat exchanger
The abutment of journey is arranged at the top of the shell side of the U-tube shell heat exchanger.It should be noted that in the present embodiment, institute
Down-comer 26 is stated to connect by the shell side of the first isocon 27 and the second isocon 28 respectively with the U-tube shell heat exchanger,
Therefore, the abutment of down-comer 26 described above and shell side actually refers to the first isocon 26 and the second isocon 27 and shell side
Abutment.The abutment of first isocon, 26 and second isocon 27 and the shell side of the U-tube shell heat exchanger is equal
Less than the abutment of the tedge 22 and the shell side of the U-tube shell heat exchanger.It is because device of working medium using such a design
Exist in liquid form before evaporator 3 is entered, be changed into gaseous state after the heat exchange of evaporator 3, by down-comer 26 and shell side
Abutment is arranged at the bottom of shell side, and abutment setting and the top of shell side of the tedge 22 with shell side, can ensure vaporous water
Working medium smoothly enters drum.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
Subject to.