CN108253831A - Saturated water-steam energy storage system and energy storage method - Google Patents
Saturated water-steam energy storage system and energy storage method Download PDFInfo
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- CN108253831A CN108253831A CN201810004977.9A CN201810004977A CN108253831A CN 108253831 A CN108253831 A CN 108253831A CN 201810004977 A CN201810004977 A CN 201810004977A CN 108253831 A CN108253831 A CN 108253831A
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- energy storage
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The present invention provides a kind of saturated vapor energy-storage system, including：Saturation water storage tank, flash tank, throttle valve, regulating valve, the saturation water storage tank is provided with water inlet and saturation water out, the saturation water out is connected to flash tank water inlet by connecting pipeline, the flash tank water inlet is connected with the spraying device of saturation water atomization, and the flash drum overhead is provided with steam (vapor) outlet；Throttle valve and regulating valve are provided in the connecting pipeline.The present invention also proposes a kind of saturated vapor energy storage method.Proposed by the present invention is a kind of high-efficiency energy-storage system for integrating sensible heat energy storage and hidden heat energy storage.The energy storage mode is not only applicable to the heat accumulation mode of photo-thermal project, since its investment is relatively low, for large-scale wind-power electricity generation project, can also have good income using this saturated water heat accumulation mode.
Description
Technical field
The invention belongs to new energy fields, and in particular to a kind of system and method using phase-change accumulation energy.
Background technology
It is one of emphasis of China's energy development with renewable energy power generations such as wind energy and solar energy, but in regenerative resource
It while power generation is fast-developing, is also faced with and abandons wind, abandon a series of problems, such as consumption of the renewable energy source powers such as light is difficult.
Main cause is the intermittence of wind-power electricity generation and solar power generation, it is impossible to which round-the-clock power generation, power fluctuation is big, it is difficult to undertake basis
Electric load.By research and development for many years and Demonstration Application, only wind energy and solar energy are stored in its useful effect,
When power grid needs, the energy of storage can be released, generated electricity, this difficulty will be readily solved.
Energy storage at present mainly divides following four major types：First, mechanical energy storage；Second, Power Flow；Third, chemical energy storage；
4th, accumulation of heat/phase-change accumulation energy.In recent years, as power grid is to the wind-power electricity generation to generate electricity by way of merging two or more grid systems and the electricity quality of solar power generation
It is required that it is higher and higher, solar energy or wind-solar hybrid energy are transformed into steam, pushing turbine power generation accords with to obtain high quality
Merge the electric power of net requirement, so as to solve the problems, such as grid-connected hardly possible.Therefore, photo-thermal power generation technology is come into being.So accumulation of heat/phase
Become energy storage and receive people's concern.Accumulation of heat/phase-change accumulation energy is mainly using the thermal capacity of substance by temperature change come storage energy
And realize storage when being undergone phase transition by heat-storing material to absorb or give off heat, that is, pass through sensible heat energy storage and hidden heat energy storage
Mode carry out.
At present, the thermophore working medium of common accumulation of heat/phase-change accumulation energy has water, fuse salt, conduction oil, concrete, liquid gold
Belong to etc..In recent years, since fuse salt has good thermal storage performance, by extensive research and application.However, the appearance due to heat accumulation
Amount is directly proportional to the temperature difference of heat-storage medium, and therefore, the fusing point of fused salt affects the effect of heat accumulation compared with higher position.Although in the recent period
Related low melting point fused salt has been reported, but its price is high, greatly improves the cost of investment of project, and has no large-scale
Using.Fuse salt is it there are larger heat exchange loss using maximum bottleneck, and equipment dynamic consumption is big, and equipment is complicated.And
And the first amount of investment of fuse salt is very big, the photo-thermal power station of a 50MW, it is necessary to 40,000 tons of fused salt, with one ton of fused salt 4500
It yuan/ton calculates, only fused salt just needs 1.8 hundred million yuan, there is a need for being able to accommodate the high heat insulated tank of 40,000 tons of fused salts in addition.So
So big investment certainly will bring the raising of rate for incorporation into the power network.People assert, if the electricity price of photo-thermal power generation online is not less than photovoltaic
Power generation, even lower level, then the photo-thermal power generation industry future probability of existence is very low.Therefore while using fused salt, people
Also explore be greatly lowered how phase-change accumulation energy cost.In this way, the phase-change heat-storage material that carrier is done with water just receives
The concern of people.Mainly using water as heat accumulating for fused salt, cost can be ignored, and reduce
Heat exchange loss, reduces the investment of heat transmission equipment, makes whole system simpler, it can substantially reduce rate for incorporation into the power network, par
Online is within sight.
Invention content
For the shortcoming of various energy storage modes in the prior art, the present invention proposes a kind of saturated water-steam energy storage system
System.And provide the method that the system can be applied to carry out energy storage.
Realize that above-mentioned purpose technical solution of the present invention is：
A kind of saturated water-steam energy storage system, including：Saturated water energy storage canister, flash tank, throttle valve, regulating valve,
The saturation water storage tank is provided with water inlet and saturation water out, and the saturation water out is connected by connecting pipeline
In flash tank water inlet, the flash tank water inlet is connected with the spraying device of saturation water atomization, and the flash drum overhead is set
It is equipped with steam (vapor) outlet；
Throttle valve and regulating valve are provided in the connecting pipeline.
This system can only set a saturated water energy storage canister and a flash tank, also can form tank battery by multiple single tanks
Group, flash tank can form flash distillation tank battery by 1-3 single tank.
Preferably, including 2-20 saturation water storage tank in parallel, unified outlet and 1-3 sudden strain of a muscle are connected to after in parallel
Steaming pot.
A preferred technical solution of the present invention is that the saturated water-steam energy storage system includes 2-3 sudden strain of a muscle in parallel
Steaming pot, the unified outlet are connect one by one with each flash tank.
Wherein, the water inlet of the saturation water storage tank is inserted into from tank deck and extend into tube bottom；The tank of the saturation water storage tank
Wall is multilayered structure, is followed successively by inner cylinder, inner thermal insulating layer, outer barrel, external thermal insulation from inside to outside, and inner cylinder and outer barrel are formed
Vacuum cavity is provided with supporting steel bolt in the vacuum cavity, and the vacuum cavity is provided with vacuum suction mouth；The inside holding
Layer is made of the filler of thermal radiation resistant, and the filler is selected from heat-insulating calcium silicate product, expanded perlite, rock wool and mineral wool, silicic acid
It is one or more in aluminium heat insulation material, mineral wool, foam glass, vitreous pearl, granular polystyrene.
Wherein, the flash tank water inlet is arranged on flash tank lower part, and the top of flash tank is provided with demister.Flash tank
It is coated with insulating layer.
A kind of saturated water-steam energy storage method, including operation：
Saturated water is stored in saturation water storage tank, then by the control of throttle valve and regulating valve, in flash tank etc.
Temperature atomization, the steam being atomized is for steam turbine power generation, industrial heating, household heating, sea water desalination, oil-field thick-oil exploitation.
Further, the tank skin of the saturation water storage tank is provided with vacuum cavity, and the gas of vacuum cavity is made by vacuumizing
It presses as 600mmHg-1mmHg.
Wherein, the temperature of the saturated water is 100-327 DEG C, pressure 1-22MPa.
Wherein, the operating pressure of the flash tank is 0.5MPa-15MPa.
The beneficial effects of the present invention are：
After the characteristics of having investigated various energy storage modes, the application proposes and high temperature and pressure saturated water is applied to carry out
Energy storage, the energy storage mode are also a kind of energy storage mode of heat accumulation/phase transformation, which invests low, in a smaller space can
Store a large amount of energy.It is a kind of high-efficiency energy-storage system for integrating sensible heat energy storage and hidden heat energy storage.The energy storage mode is not only
Suitable for the heat accumulation mode of photo-thermal project, since its investment is relatively low, for large-scale wind-power electricity generation project, use is this
Saturated water heat accumulation mode can also have good income.
Description of the drawings
Fig. 1 is saturated water-steam energy storage system structure diagram of the present invention；
Fig. 2 is that the P-V of real gas schemes.
Component and alphabetical correspondence are in figure:Saturated water energy storage canister A, flash tank B, throttle valve C, regulating valve D, connecting tube
Line E；
Component and the correspondence of number are in figure：Storage tank external thermal insulation 1, storage tank outer barrel 2, storage tank inner cylinder 3, storage tank
Inner thermal insulating layer 4, storage tank supporting steel bolt 5, storage tank saddle 6, storage tank water outlet 7, storage tank vacuum suction mouth 8, storage tank water inlet 9 dodge
Steaming pot steam (vapor) outlet 10 flashes tank body 11, flash tank insulating layer 12, flash boiling spray device 13, flash tank discharge outlet 14, flash tank
Skirt 15, water inlet 16 flash demister 17, the filler 18 of thermal radiation resistant.
Specific embodiment
Illustrate the present invention below by most preferred embodiment.Those skilled in the art institute it should be understood that, embodiment is only used for
It illustrates rather than for limiting the scope of the invention.
In embodiment, unless otherwise instructed, means used are the means of this field routine.Embodiment 1
Referring to Fig. 1, a kind of saturated water-steam energy storage system, including：By saturation water storage tank A, flash tank B, throttle valve C, adjust
Save valve D, connecting pipeline E.The saturated water of the present embodiment-steam energy storage system, 1 saturation water storage tank；With 1 flash tank, saturation
Water storage tank is connected by throttle valve C, regulating valve D, connecting pipe E with flash tank.
The saturation water storage tank A is by storage tank inner cylinder 3, storage tank outer barrel 2, storage tank inner thermal insulating layer 4, storage tank external thermal insulation 1,
Storage tank supporting steel bolt 5, storage tank saddle 6, storage tank water outlet 7, storage tank water inlet 9, storage tank vacuum suction mouth 8 form.By thermal-arrest system
The high temperature and pressure saturated water that system comes enters saturation water storage tank A through storage tank water inlet 9.The tank skin of the saturation water storage tank is multilayer
Structure is followed successively by storage tank inner cylinder 3, storage tank inner thermal insulating layer 4, storage tank outer barrel 2, storage tank external thermal insulation 1, inner cylinder from inside to outside
Vacuum cavity is formed with outer barrel, is provided with storage tank supporting steel bolt 5 in the vacuum cavity, the vacuum cavity is provided with storage tank
It is sucked by vacuum mouth 8；Inner thermal insulating layer is made of the filler of thermal radiation resistant, and the filler is expanded perlite.
One cavity is constituted by inner cylinder and outer barrel, and cavity employs the interior guarantor that vacuum increases thermal insulation material composition
Under conditions of absolute vacuum, it is outside to substantially eliminate saturated water in A tanks due to the presence of vacuum layer for warm layer, the insulating layer
Heat conducting and radiating.The filler 18 of thermal radiation resistant is employed in inner thermal insulating layer, substantially eliminates radiant heat.Coordinate this storage tank again
The external thermal insulation of A so that the saturated water in saturation water storage tank A was no more than 1% in 24 hours temperature drops.To ensure saturation water storage tank A
Water inlet when level stability, water inlet use bottom insert canal form.Insulating layer is connected to one equipped with vacuum suction mouth by pump orifice
A high vacuum pumping system ensures the condition of high vacuum degree of the inner thermal insulating layer of saturation water storage tank.It can also ensure that inner thermal insulating layer is absolute
In the case of No leakage, when an aspiration vacuum level reaches 1mmHg columns, pump orifice can be shut completely, to ensure long-term protect
The vacuum degree of inner thermal insulating layer is held, the heat insulation effect so as to maintain a long-term stability.
Saturated water is stored to carry out heating power energy storage using storage tank A, is by the way of " sensible heat energy storage ".So-called " sensible heat
Energy storage " is exactly when chemical change or phase transformation not occurring by certain material, to make temperature rise or decline and store thermal energy, this storage
Thermal technology is currently comparative maturity, and material source enriches, and cost is most cheap.Most the material of suitable sensible heat heat accumulation has extensively at present
Water, fuse salt, conduction oil, concrete, liquid metal etc., but cost is cheapest still " water ".This energy-storage system is exactly to use
The high temperature saturated water stored under certain high pressure and under corresponding pressure is heat-storage medium, that is, employ the side of sensible heat energy storage
Formula.The pressure of water is carried higher, the temperature of saturated water is promoted higher, and the thermal energy of storage is higher.
Throttle valve C and regulating valve D are provided on connecting pipeline E.Saturated water in saturation water storage tank A passes through regulating valve D
Enter flash tank B with throttle valve C, saturated water is undergone phase transition in B tanks, mutually becomes steam at a terrific speed from water.This is one
The process of a flash distillation.So-called " flash distillation " is exactly that the saturated liquid of high pressure enters in the container of low pressure, due to the unexpected drop of pressure
It is low, make the saturated liquid of high pressure that quick phase transformation occur in low pressure vessel.
Flash tank flashes demister 17 by water inlet 16, flash boiling spray device 13, flashes tank body 11, flash tank insulating layer
12, flash tank steam (vapor) outlet 10, flash tank discharge outlet 14, flash tank skirt 15 forms.
Enter the saturated water of flash tank by saturation water storage tank, first by flash boiling spray device by saturation water atomization, increase is satisfied
With the surface area of the evaporation of water, make flash distillation is for example lightening to evaporate, and pass through and flash demister 17, make to be contained in thin in steam
Small droplet is removed by demister, improves the mass dryness fraction of steam.With certain mass dryness fraction and the steam of parameter is required by flash tank steam
10 discharge of outlet, is sent to needing a little for steam.The range of operating parameters of this system is：The temperature of saturated water is 100-327 DEG C, pressure
Power is 1-22MPa；The operating pressure of flash tank is 0.5MPa-15MPa.
Entire flash process is the process of a phase transformation, and the pressure potential of saturated water is transformed into the latent heat in steam by it
Can, that is, realized in flash tank and hidden heat energy storage is changed by sensible heat energy storage.It is a small amount of without vaporization drop (if there is
If) sensible heat energy, be sent to steam point of use by low-pressure steam is mutually become by lower second level flash tank.The process of flash distillation
It is a phase transition process extremely fast, so the steam after phase transformation is completed in flash tank is not stopped in flash tank and is put into
Steam conveying pipe.
Saturation water storage tank A and flash tank B, regulating valve D and throttle valve C are constituted one " sensible heat energy storage+hidden heat energy storage "
One system for directly supplying steam.This is the energy storage steam-supplying system of an extremely simple solar-thermal generating system.This system uses
Efficient Insulation, substantially to make whole system ensure that entire energy storage system is constant temperature without radiation loss.It is entire real
During applying, system is to expand to carry out along isothermal pressure.According to the p-v of vapor scheme (Fig. 2) as can be seen that steam along
When thermoisopleth expands, if the pressure and temperature of saturated water, closer to critical point C, storage energy is bigger.Moreover, being expanded into one
During constant-pressure, steam is possibly into dry saturation state, even up to superheat state.This is the one of " saturated water-steam " energy storage
A very superior performance.
By p-v figures as an example, AC lines are using a left side as liquid phase region in p-v figures, and BC lines are using the right side as overheated zone, region that ABC is surrounded
For vehicle repair major area, AC lines are saturation waterline, and BC lines are saturated vaporline.When the pressure of water is p3, the saturation of p3 is corresponded to
Temperature is T3, and b3 points are the saturation point under P3 pressure, and state when saturated water is with b3 enters flash tank.In vehicle repair major area
In, temperature line and pressure line are to overlap, and are that vehicle repair major coexists, the latent heat of vaporization of Vapor phase partial derives from by b3 to d3 points
The energy release of liquid phase.So pressure does not drop in vehicle repair major area, but the temperature for there be not the liquid of phase transformation is reduction of, but whole
The sum of the sensible heat not having in the liquid of the phase transformation energy of a system and the latent heat of vaporization energy of phase transformation do not change, so to d3
Point, temperature when saturated water mutually becomes steam completely still remain the temperature of T3, and pressing the line of force and temperature line in d3 separates, pressure
Power drops to p2, and the reference point E of p3 and T3 is the new equalization point after flash distillation at this time, and enters overheated zone, and the saturation temperature of p2 is T2,
The degree of superheat of steam is (T3-T2) at this time, and the latent heat of vaporization of steam derives from the potential energy of pressure sharp fall.
Above embodiment be only the preferred embodiment of the present invention is described, not to the scope of the present invention into
Row limits, and under the premise of design spirit of the present invention is not departed from, this field ordinary skill technical staff is to the technical side of the present invention
The all variations and modifications that case is made should all be fallen into the protection domain that claims of the present invention determines.
Claims (9)
1. a kind of saturated water-steam energy storage system, which is characterized in that including：Saturation water storage tank, flash tank, throttle valve, adjusting
Valve,
The saturation water storage tank is provided with water inlet and saturation water out, and the saturation water out is connected to sudden strain of a muscle by connecting pipeline
Steaming pot water inlet, the flash tank water inlet are connected with the spraying device of saturation water atomization, and the flash drum overhead is provided with
Steam (vapor) outlet；
Throttle valve and regulating valve are provided in the connecting pipeline.
2. saturated water according to claim 1-steam energy storage system, which is characterized in that including 2-20 saturation in parallel
Water storage tank is connected to unified outlet and 1-3 flash tank after in parallel.
3. saturated water according to claim 2-steam energy storage system, which is characterized in that the saturated water-steam energy storage
System includes 2-3 flash tank in parallel, and the unified outlet is connect one by one with each flash tank.
4. saturated water according to claim 1-steam energy storage system, which is characterized in that the water inlet of the saturation water storage tank
Mouth is inserted into from tank deck and extend into tube bottom；The tank skin of the saturation water storage tank is multilayered structure, is followed successively by inner cylinder from inside to outside
Body, inner thermal insulating layer, outer barrel, external thermal insulation, inner cylinder and outer barrel form vacuum cavity, and branch is provided in the vacuum cavity
Steel bolt is supportted, the vacuum cavity is provided with vacuum suction mouth；The inner thermal insulating layer is made of the filler of thermal radiation resistant, the filler
Selected from heat-insulating calcium silicate product, expanded perlite, rock wool and mineral wool, aluminum silicate insulation material, mineral wool, foam glass, vitreous
It is one or more in pearl, granular polystyrene.
5. saturated water according to claim 1-steam energy storage system, which is characterized in that the flash tank water inlet setting
In flash tank lower part, the top of flash tank is provided with demister；Flash tank is coated with insulating layer.
6. a kind of saturated water-steam energy storage method, which is characterized in that including operation：
Saturated water is stored in saturation water storage tank, then by the control of throttle valve and regulating valve, the isothermal mist in flash tank
Change, the steam being atomized is for steam turbine power generation, industrial heating, household heating, sea water desalination, oil-field thick-oil exploitation.
7. saturated water according to claim 6-steam energy storage method, which is characterized in that the tank skin of the saturation water storage tank
Vacuum cavity is provided with, the air pressure that vacuum cavity is made by vacuumizing is 600mmHg-1mmHg.
8. saturated water according to claim 6-steam energy storage method, which is characterized in that the temperature of the saturated water is
100-327 DEG C, pressure 1-22MPa.
9. according to claim 6-8 any one of them saturated water-steam energy storage method, which is characterized in that the flash tank
Operating pressure is 0.5MPa-15MPa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810004977.9A CN108253831A (en) | 2018-01-03 | 2018-01-03 | Saturated water-steam energy storage system and energy storage method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810004977.9A CN108253831A (en) | 2018-01-03 | 2018-01-03 | Saturated water-steam energy storage system and energy storage method |
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| CN108253831A true CN108253831A (en) | 2018-07-06 |
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ID=62725694
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| CN201810004977.9A Pending CN108253831A (en) | 2018-01-03 | 2018-01-03 | Saturated water-steam energy storage system and energy storage method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576444A (en) * | 2020-12-11 | 2021-03-30 | 河南恒聚新能源设备有限公司 | Complementary system for promoting photo-thermal power generation flat-price internet access innovation technology coupling |
| CN112664171A (en) * | 2020-12-23 | 2021-04-16 | 河南恒聚新能源设备有限公司 | Wind-solar-heat-hydrogen-storage integrated system for thermal recovery of thick oil steam in onshore oil field |
| CN112796722A (en) * | 2021-03-15 | 2021-05-14 | 河南恒聚新能源设备有限公司 | System for offshore oil field steam thermal power exploitation by using wind power and photovoltaic |
| CN113060883A (en) * | 2021-03-15 | 2021-07-02 | 河南恒聚新能源设备有限公司 | Wind, light, heat and hydrogen storage integrated renewable energy seawater desalination system |
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| CN201921537U (en) * | 2010-12-20 | 2011-08-10 | 潍坊市元利化工有限公司 | Continuous flash drum |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112576444A (en) * | 2020-12-11 | 2021-03-30 | 河南恒聚新能源设备有限公司 | Complementary system for promoting photo-thermal power generation flat-price internet access innovation technology coupling |
| CN112664171A (en) * | 2020-12-23 | 2021-04-16 | 河南恒聚新能源设备有限公司 | Wind-solar-heat-hydrogen-storage integrated system for thermal recovery of thick oil steam in onshore oil field |
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