CN207350902U - Electricity-saving type gravity salt discharge formula photo-thermal field - Google Patents
Electricity-saving type gravity salt discharge formula photo-thermal field Download PDFInfo
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- CN207350902U CN207350902U CN201720783933.1U CN201720783933U CN207350902U CN 207350902 U CN207350902 U CN 207350902U CN 201720783933 U CN201720783933 U CN 201720783933U CN 207350902 U CN207350902 U CN 207350902U
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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Abstract
The utility model discloses a kind of electricity-saving type gravity salt discharge formula photo-thermal field, including cold tank, hot tank, two groups of heat collectors and salt discharge collection device through salt transporting tube and cold tank and hot tank composition circuit, straight pipe is provided between the hot tank and cold tank, control valve is provided with the straight pipe.The heat collector of the utility model; it is made of multiple sub- groove type heat collectors; each thermal-collecting tube forms inclined passage; during normal work; fused salt is flowed to high-end and progressively heated by each sub- groove type heat collector from low side; meet follow-up thermoelectricity requirement; when there is hang-up; stop the active output of fused salt first; into recycling state, make fused salt reflux recycling using inclined angle, the fused salt after recycling in pipeline, which is concentrated, to be entered collecting tank and carry out insulation and can be uniformly processed; and extruded using air pressure from bottom, ensure the convenience and security of discharging operation.
Description
Technical field
Photo-thermal electro-technical field is the utility model is related to, more particularly to a kind of electricity-saving type gravity salt discharge formula photo-thermal field.
Background technology
Traditional solar parabolic through power generation system is that heat collector is arranged in sunglasses field, and the collection thermal medium in heat collector is
Conduction oil, therefore, sunglasses field converge to sunlight in heat collector, so as to be high temperature by heat-conducting oil heating cold in heat collector
Conduction oil；Be flowed into oil water heat exchange device from the high temperature heat conductive oil of heat collector output, heat exchange carried out with cooling water, by cooling water plus
Heat is superheated steam, so that driving steam turbine acting power generation；The cold conduction oil exported through oil water heat exchange device is circulated by conduction oil
Pump is transmitted back in heat collector again to absorb heat.In addition, when sunlight is sufficient, from the high temperature heat conductive oil also portion of heat collector output
Divide and be transported in oily salt heat exchanger, heat exchange occurs with heat-storage medium fuse salt, fuse salt is heated to be high-temperature fusion salt, and lead to
Overheat storage salt cellar is stored as heat source.It can be seen from the above that traditional solar parabolic through power generation system, using conduction oil as thermal-arrest
Medium, using fuse salt as heat storage medium, using water vapour as power generation medium；Since the temperature upper limit of conduction oil is 400
Degree, so as to constrain the vapor (steam) temperature and pressure parameter of trough type solar power generation, it is difficult to improve generating efficiency；Further, since
Three kinds of media are employed, solar parabolic through power generation system needs to set oily salt heat exchanger and oil water heat exchange device, adds system
Cost.
To solve the above problems, the exploitation of Ye You research and development institutions is used as thermal-arrest and accumulation of heat at the same time using medium of fused salt in the world
The solar parabolic through power generation system of medium, however, since the solidification point of fuse salt is very high, fuse salt is very easy to coagulate
Gu so that the tape loop for whole solar parabolic through power generation system carrys out catastrophic failure.
CN105545618A discloses a kind of solar parabolic through power generation system using medium of fused salt and hot power generation side
Method, system include groove type heat collector, brine heat exchanger, steam turbine generator, low-temperature heat accumulating tank, high-temperature heat accumulation tank and row's fuse salt system
System；Groove type heat collector is made of the sub- groove type heat collector of multiple row independence, and each sub- groove type heat collector is pressed by multiple thermal-collecting tubes
Sequence from low to uper part concatenates；Open up at least one salt discharge pipeline on each sub- groove type heat collector, the one of the salt discharge pipeline
End is connected with the cavity of the sub- groove type heat collector, the other end connection storage salt cellar of the salt discharge pipeline；Leaned in the salt discharge pipeline
One end installation control valve of the nearly sub- groove type heat collector；In addition, the bottom of each sub- groove type heat collector is additionally provided with
Air inlet.
Although above-mentioned technology realizes the discharge of high-temperature molten salt, increase salt discharge pipeline on multistage thermal-collecting tube respectively, lead
Cause system structure complicated, it is of high cost, and cannot be guaranteed not remain during salt discharge or solidify, and needed in the maintenance period
Want substantial amounts of electric power to be kept the temperature, increase energy consumption.
Utility model content
The purpose of this utility model is to be directed to technological deficiency existing in the prior art, and provides a kind of electricity-saving type gravity row
Salt formula photo-thermal field and its control method.
Technical solution is used by realize the purpose of this utility model：
A kind of electricity-saving type gravity salt discharge formula photo-thermal field, including cold tank, hot tank, through salt transporting tube and cold tank and hot tank form circuit
Two groups of heat collectors and salt discharge collection device, the heat collector includes multiple sub- groove type heat collectors for being sequentially connected in series, described
Sub- groove type heat collector include speculum and thermal-collecting tube and to sense the temperature sensor of temperature of molten salt in thermal-collecting tube, it is described
Thermal-collecting tube set with horizontal plane retaining clip overturning angle, it is other on the salt transporting tube of high point side to be connected to admission gear, positioned at low
The salt discharge collection device is provided with point side salt transporting tube；
Straight pipe is provided between the hot tank and cold tank, control valve is provided with the straight pipe；
The salt discharge collection device includes being located at low spot side salt transporting tube salt discharge pipeline, corresponding with the salt discharge pipeline
Collecting tank, the collecting tank include going deep into bottom in tank body and with the delivery pipe of salt discharge pipeline joint, and gas port, with institute
The corresponding air pressure salt discharge mechanism of gas port stated.
Triple valve is provided with the gas port, one of valve port of triple valve connects with the air pressure salt discharge mechanism
It is logical.
The air pressure salt discharge mechanism includes nitrogen pressure source, and duct type gas corresponding with the nitrogen pressure source adds
Heat engine structure.
The transport vehicle of the collecting tank described in carrying is further included, lifting frame is provided with the transport vehicle.
Angle is obliquely installed at 4 ° -10 °.
A kind of control method of gravity salt discharge type groove type heat collector, it is characterised in that
Stop external heat outputting, high-temperature molten salt is directly entered cold tank through straight pipe, and the temperature of hot tank and cold tank is reached
Temperature upper limit,
Salt discharge pipeline and admission gear are opened, by delivery pipe and salt discharge pipeline joint；
Under gravity then the fused salt reflux in thermal-collecting tube and salt transporting tube is discharged through salt discharge pipeline, and fused salt enters collecting tank
It is interior, while gas port is exhausted；
The collecting tank for being stored with fused salt is connected to cold tank or hot tank, starts air pressure salt discharge mechanism by fused salt pressure in collecting tank
Go out.
There are defocus steps before salt discharge, and fused salt reserves in hot tank are reached into maximum step, described defocusing is
Referring to each pilot trench formula collector of synchronous rotary makes its opening down.
After the reduction of high-temperature molten salt emission flow or the scheduled time, collected from high-end to each pilot trench formula of low side lifting step by step
The height of the thermal-collecting tube of device.
Fused salt is reduced when causing temperature to reduce to exceed low temperature threshold in because of thermal-collecting tube, is started to thermal-collecting tube and salt transporting tube
Electrical heating, when temperature of molten salt reduces in cold tank, directly cold tank is pumped into by the high-temperature molten salt in hot tank through straight pipe.
The step of nitrogen pressure source is heated in startup is further included during the air pressure salt discharge.
Compared with prior art, the beneficial effects of the utility model are：
The heat collector of the utility model, is made of multiple sub- groove type heat collectors, and each thermal-collecting tube forms inclined passage, normally
During work, fused salt is flowed to high-end and progressively heated by each sub- groove type heat collector from low side, is met follow-up thermoelectricity requirement, is worked as appearance
During hang-up, stop the active output of fused salt first, into recycling state, make fused salt reflux recycling using inclined angle,
Fused salt after recycling in pipeline, which is concentrated, to be entered collecting tank and carries out insulation and can be uniformly processed, and is pressed using air pressure from bottom
Go out, ensure the convenience and security of discharging operation.By the setting of straight pipe, can increase in cold tank and hot tank before maintenance
The temperature of fused salt, and increase the amount of storage of fused salt in heating tank as far as possible, the distribution for circulation state of breaking the normal procedure, this can just gather more
Heat, can within a period of time using accumulate heat ensure fused salt not cure.
Brief description of the drawings
Fig. 1 show the structure diagram of the photo-thermal device of the utility model；
Fig. 2 show the structure diagram of thermal-collecting tube.
Fig. 3 show the structure diagram of the electric heater unit of the light field of the utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description only to explain the utility model, is not used to limit the utility model.
As shown in the figure, the utility model discloses a kind of electricity-saving type gravity salt discharge formula photo-thermal field, including cold tank, hot tank, warp
Salt transporting tube forms two groups of groove type heat collectors and salt discharge collection device in circuit, the groove type heat collector bag with cold tank and hot tank
Include and be sequentially connected in series multiple, such as four or 6 sub- groove type heat collectors, the sub- groove type heat collector includes speculum and thermal-collecting tube 1
And to sense the temperature sensor of temperature of molten salt in thermal-collecting tube, the thermal-collecting tube is set with horizontal plane retaining clip overturning angle
Put, other on the salt transporting tube of high point side to be connected to admission gear 2, the salt discharge collection device includes being located at low spot side salt transporting tube
Salt discharge pipeline 3, collecting tank 7 corresponding with the salt discharge pipeline, the collecting tank include going deep into bottom in tank body and with
The delivery pipe 8 of salt discharge pipeline joint, and gas port, air pressure salt discharge mechanism corresponding with the gas port, using least significant end one
Collecting tank, has accomplished to concentrate harvesting, and INSULATION DESIGN, cold tank or hot tank is further back to easy to fused salt in collecting tank.Its
In, a light field has two groups of multiple sub- groove type heat collectors connected respectively to form, and two groups of sub- groove type heat collector one end are respectively and hot
Tank, the connection of cold tank, the other end form whole circuit through connecting tube connection.Straight pipe 9, institute are provided between the hot tank and cold tank
Control valve is provided with the straight pipe stated.The high-temperature molten salt that the pump for liquid salts of hot tank pumps out directly can enter cold tank by straight pipe.
The heat collector of the utility model, is made of multiple sub- groove type heat collectors, and each thermal-collecting tube forms inclined passage, normally
During work, fused salt is flowed to high-end and progressively heated by each sub- groove type heat collector from low side, is met follow-up thermoelectricity requirement, is worked as appearance
During hang-up, stop the active output of fused salt first, into recycling state, make fused salt reflux recycling using inclined angle,
Meanwhile because high temperature salt is flowed to low-temperature end during reflux, can effectively in thermal-collecting tube fused salt temperature, raising efficiency of utilization, subtracts
The possibility of few intermediate setup.The utility model makes fused salt reflux recycling, the fused salt collection after recycling in pipeline using inclined angle
It is middle to enter collecting tank and carry out insulation and be uniformly processed, and extruded using air pressure through delivery pipe from bottom, ensure discharge
The convenience and security of operation.By the setting of straight pipe, the temperature of fused salt in cold tank and hot tank can be increased before maintenance,
And increasing the amount of storage of fused salt in heating tank as far as possible, the distribution for circulation state of breaking the normal procedure, this just can gather more heats, can be
Ensure that fused salt does not cure using the heat accumulated in a period of time.
Specifically, to prevent in reflux course fused salt to solidify, while while also allowing for initial, heats pipeline, described
The thermal-collecting tube of the relatively described speculum insulation set of thermal-collecting tube and each sub- groove type heat collector is electrically connected to each other, the salt transporting tube at both ends
Upper to be wound with heating tape and ground connection respectively, each thermal-collecting tube keeps being electrically connected with heating power supply.To thermal-collecting tube using connecting, such as utilize
Metal hose is attached, can between two adjacent thermal-collecting tubes of imparting while keeping each thermal-collecting tube series connection uniformly to be heated
Certain relative rotation tolerance occurs, effectively increases overall control effect.I.e..Multiple sub- groove type heat collectors lead to
Cross metal hose or swivel joint etc. to be attached, set using multistage, drive control, more height are followed the trail of respectively easy to independent
Groove type heat collector is serially set, and fused salt is progressively heated to realize predetermined temperature requirement in each section of thermal-collecting tube flow process.
Wherein, angle is obliquely installed at 4 ° -10 °, and such as 5 ° -8 °, be preferably 6 °, and salt discharge, institute are carried out to efficiently use gravity
The groove type heat collector stated is set on the pallet changed successively on the slope or highly so that the thermal-collecting tube of each sub- groove type heat collector
Keep identical inclination angle or incrementally increase setting from bottom to high-end inclination angle.That is, the groove type heat collector of the utility model, will be at different levels
Thermal-collecting tube is inclined to set, and can use each sub- groove type heat collector coaxial-type inclined design, can also use each sub- groove type heat collector
Thermal-collecting tube in staged set.
When going wrong, when stopping the fused salt flow driving of each sub- groove type heat collector, i.e., after overall shutdown, the utility model
Gravity salt discharge type groove type heat collector Salt discharge method, open salt discharge pipeline and admission gear, under gravity thermal-collecting tube and defeated salt
Then fused salt reflux in pipe is discharged through salt discharge pipeline, the fused salt of discharge enters in collecting tank, while gas port is exhausted；It will deposit
The collecting tank for containing fused salt is connected to cold tank or hot tank, starts air pressure salt discharge mechanism and extrudes fused salt in collecting tank.
Wherein, the air pressure salt discharge mechanism includes nitrogen pressure source, duct type corresponding with the nitrogen pressure source
Gas heater structure.Fused salt is extruded using air pressure, improves safety in utilization, and nitrogen can effectively protect the stabilization of fused salt
Property, meanwhile, while air pressure salt discharge is carried out, gas is heated to high temperature using duct type gas heater structure, as fused salt coagulates
More than solid point, the smoothness of salt discharge can be effectively ensured, avoid salt discharge process settings.
Flowed using the high fused salt of temperature to the low fused salt of temperature, the low discharge first of temperature, effectively reduces solidification in pipe
Phenomenon, before maintenance is carried out maintenance, first choice stops external heat outputting, and high-temperature molten salt is directly entered cold tank through straight pipe, will
The temperature of hot tank and cold tank reaches temperature upper limit, then, during avoiding salt discharge, because fused salt reduction causes temperature in thermal-collecting tube
When degree exceedes high temperature threshold value, each sub- groove type heat collector is defocused first at the beginning.Described defocusing refers to synchronous rotary
Each pilot trench formula collector makes its opening down, i.e., is 120 ° with vertical aspect angle, temperature is excessive during effectively preventing causes
Vaporization, or even booster etc. is bad.Because almost no longer absorbing photo-thermal during salt discharge, when in thermal-collecting tube temperature be reduced below it is low
During warm threshold value, then start electrical heating and electric tracing to keep managing interior temperature.And to prevent that temperature is too low in cold tank, in maintenance
The preceding flow for reducing straight pipe, makes the fused salt in the cold tank in part accumulate in hot tank and exists in the form of high-temperature molten salt, Ji Jiangre
Fused salt reserves reach maximum step in tank.In the maintenance period, when temperature of molten salt reduces in cold tank, by the high temperature melting in hot tank
Salt is directly pumped into cold tank through straight pipe.
Further, after the reduction of high-temperature molten salt emission flow or the scheduled time, mass rate of emission can reduce, at this time successively
Control each sub- groove type heat collector rotation progressively to be turned round to low side from high-end, that is, raise the height of the thermal-collecting tube of each pilot trench formula collector
Degree.I.e. while having inclination angle, increase the difference in height of two adjacent sub- groove type heat collectors, mass rate of emission can be further improved, i.e.,
Each sub- groove type heat collector stepped distribution when discharging to the end.
The utility model further includes the step of nitrogen pressure source is heated in startup during the air pressure salt discharge.
While air pressure salt discharge is carried out, gas is heated to high temperature using duct type gas heater structure, more than fused salt solidification point,
The smoothness of salt discharge can be effectively ensured, avoid salt discharge process settings.
The above is only the preferred embodiment of the utility model, it is noted that for the general of the art
For logical technical staff, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these change
The scope of protection of the utility model is also should be regarded as into retouching.
Claims (5)
1. a kind of electricity-saving type gravity salt discharge formula photo-thermal field, it is characterised in that including cold tank, hot tank, through salt transporting tube and cold tank and heat
Tank forms two groups of heat collectors and salt discharge collection device in circuit, and the heat collector includes the multiple pilot trench formula collection being sequentially connected in series
Hot device, the sub- groove type heat collector include speculum and thermal-collecting tube and are passed to sense the temperature of temperature of molten salt in thermal-collecting tube
Sensor, the thermal-collecting tube are set with horizontal plane retaining clip overturning angle, other on the salt transporting tube of high point side to be connected into mechanism of qi
Structure, is provided with the salt discharge collection device at the salt transporting tube of low spot side；
Straight pipe is provided between the hot tank and cold tank, control valve is provided with the straight pipe；
The salt discharge collection device includes being located at low spot side salt transporting tube salt discharge pipeline, collection corresponding with the salt discharge pipeline
Tank, the collecting tank include going deep into bottom in tank body and with the delivery pipe of salt discharge pipeline joint, and gas port, it is and described
The corresponding air pressure salt discharge mechanism of gas port.
2. electricity-saving type gravity salt discharge formula photo-thermal field as claimed in claim 1, it is characterised in that be provided with three at the gas port
Port valve, one of valve port of triple valve and the air pressure salt discharge mechanism connection.
3. electricity-saving type gravity salt discharge formula photo-thermal field as claimed in claim 2, it is characterised in that the air pressure salt discharge mechanism bag
Nitrogen pressure source is included, duct type gas heater structure corresponding with the nitrogen pressure source.
4. electricity-saving type gravity salt discharge formula photo-thermal field as claimed in claim 1, it is characterised in that further include described in carrying
The transport vehicle of collecting tank, is provided with lifting frame on the transport vehicle.
5. electricity-saving type gravity salt discharge formula photo-thermal field as claimed in claim 1, it is characterised in that be obliquely installed angle 4 °-
10°。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720783933.1U CN207350902U (en) | 2017-06-30 | 2017-06-30 | Electricity-saving type gravity salt discharge formula photo-thermal field |
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| CN201720783933.1U CN207350902U (en) | 2017-06-30 | 2017-06-30 | Electricity-saving type gravity salt discharge formula photo-thermal field |
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| CN207350902U true CN207350902U (en) | 2018-05-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166758A (en) * | 2017-06-30 | 2017-09-15 | 天津滨海光热技术研究院有限公司 | Electricity-saving type gravity salt discharge formula photo-thermal and control method |
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2017
- 2017-06-30 CN CN201720783933.1U patent/CN207350902U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166758A (en) * | 2017-06-30 | 2017-09-15 | 天津滨海光热技术研究院有限公司 | Electricity-saving type gravity salt discharge formula photo-thermal and control method |
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