CN103836703B - Fused salt regenerative electrochemical heats central heating system - Google Patents
Fused salt regenerative electrochemical heats central heating system Download PDFInfo
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- CN103836703B CN103836703B CN201410093965.XA CN201410093965A CN103836703B CN 103836703 B CN103836703 B CN 103836703B CN 201410093965 A CN201410093965 A CN 201410093965A CN 103836703 B CN103836703 B CN 103836703B
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Abstract
Fused salt regenerative electrochemical heats central heating system, belongs to heat storage technology field.Including fused salt electric heater, the hot salt cellar of high temperature, the cold salt cellar of low temperature, pump for liquid salts, brine heat exchanger, heat user.In the low price trough-electricity period at night, by pump for liquid salts, the fused salt in cold salt cellar is extracted out and is transported to fused salt electric heater and is heated to after high temperature entering hot salt cellar by fused salt, peak times of power consumption on daytime using pump for liquid salts by hot salt cellar in accumulate the high-temperature molten salt of heat and extract out and be transported to the heating Aquatic product heat water of fused salt water- to-water heat exchanger heating municipal administration and heat to resident.For coal-burning boiler central heating system commonly used at present, as long as the boiler room of central heating system is transformed, it is transformed into fused salt heat-lag time, municipal heating network and heating end-equipment are all not required to be transformed.This system can play peak load shifting, reduce coal-fired usage amount, play the effect of environmental protection.
Description
Technical field
The present invention relates to a kind of electrical heating hold over system, more particularly to adopt fused salt as accumulation of heat working medium, using low ebb
The system of electric central heating, belongs to heat storage technology field.
Background technology
Current haze shrouds Chinese multiple provinces and cities under Chinese situation and, in order to obtain pure and fresh air, starts coal one after another and change
Electrical engineering.Beijing starts coal simultaneously and changes gas engineering, and each large coal-fired boiler has been made into burning natural gas to heat, and thus
Bring is that Pekinese's natural gas is seriously not enough.Additionally, the raising of the development of society and living standards of the people, China is made to use
Electric structure there occurs and drastically changes, peak power wretched insufficiency, and peak-valley difference continues to increase, the generating set fallback of paddy phase,
For solving this contradiction, propose " peak load shifting " measure in power industry, implement time-of-use tariffs, encourage the electricity consumption of paddy phase.Using
Unnecessary electrical power conversion, to realize central heating, can be become thermal energy storage in high temperature in low power consumption by electrical heating salt melting system
In fused salt, again the heat storing is carried out discharging heating when peak times of power consumption, not only solve city coal-burning boiler to air
Pollution, even more alleviate electrical network peak-valley difference effective technological approaches.
Content of the invention
In view of the deficiency that prior art exists, the invention provides a kind of adopt low ebb electrical heating high-temperature molten salt, for using
The fused salt regenerative electrochemical heating central heating system saving energy and protect environment of electric peak period heating.
A kind of fused salt regenerative electrochemical heating central heating system it is characterised in that：Mainly include storing up for making fused salt heat up
The fused salt electric heater 1 of heat, the hot salt cellar 2 of storage high-temperature molten salt, the cold salt cellar 3 of storage low-temperature molten salt, low-temperature molten salt pump 4, height
Temperature molten salt pump 5, carry out the brine heat exchanger 6 of heat exchange, heat user 7 for fused salt and water.
Fused salt electric heater 1 adopts snakelike pipe 9 as heating element heater, and there is housing the outside of snakelike pipe 9, housing sets
There are fused salt outlet and fused salt import, fused salt outlet is provided with molten salt heater outlet temperature sensor 10, and fused salt import is provided with
Molten salt heater inlet temperature sensor 11, for monitoring the temperature of heating fused salt, the snakelike pipe 9 of fused salt electric heater 1 with
Power supply connects, for controlling the start and stop of electric heater.
The fused salt outlet of fused salt electric heater 1 is connected with the import of hot salt cellar 2 by pipeline, the outlet of hot salt cellar 2 via
High-temperature melting salt pump 5 is connected with the tube side import of brine heat exchanger 6, the import phase of the outlet of the tube side of brine heat exchanger 6 and cold salt cellar 3
Even, the outlet of cold salt cellar 3 is connected with the import of fused salt electric heater 1 via low-temperature molten salt pump 4, electric heater 1, hot salt cellar 2, cold
The closure pipeline that salt cellar 3, low-temperature molten salt pump 4, high-temperature melting salt pump 5, brine heat exchanger 6 are formed is fused salt loop.
The shell side of brine heat exchanger 6 connects composition water loop by supply channel 30, water return pipeline 31 with heat user, in salt
Equipped with water loop system pressure sensor 24, water loop system temperature sensor on supply channel at water- to-water heat exchanger 6 shell-side outlet
25th, water loop flow system flow sensor 26, is provided with water circulating pump 27 and constant pressure supply water and water process system on water return pipeline 31
System 28.
Hot salt cellar 2, cold salt cellar 3 top are respectively mounted promising fused salt and provide the hot melt salt pump 5 of power, sloppy heat salt pump 4, each
Jar top is provided with two pump for liquid salts, the using and the reserved；Hot salt cellar temperature sensing for monitoring temperature is provided with hot salt cellar 2
Device 12, top is provided with the hot salt cellar level monitoring mouth 14 for monitoring liquid level, and bottom is provided with the hot salt for emptying fused salt
Tank salt outlet 16；Cold salt cellar temperature sensor 13 for monitoring temperature is provided with cold salt cellar 3, top is provided with for monitoring
The cold salt cellar level monitoring mouth 15 of liquid level, bottom is provided with the cold salt cellar salt outlet 17 for emptying fused salt.
Hot salt line-pressure sensor 18, hot salt pipeline are provided with the pipeline between fused salt electric heater 1 and hot salt cellar 2
Temperature sensor 19, hot salt line flow sensor 20, the pipeline between fused salt electric heater 1 and cold salt cellar 3 are provided with cold
Salt line-pressure sensor 21, cold salt line temperature sensor 22, cold salt line flow sensor 23.
Fused salt circuit system（Big dotted line frame）, comprise all pipe-line systems for carrying fused salt, and in pipe-line system
The pressure transducer 18,21 installed, temperature sensor 19,22, flow transducer 20,23；
Brine heat exchanger 6 adopts tube shell type structure, and fused salt is in pipe-line system, and water is in shell side system, and the two is adopted
Carry out heat exchange with forced-convection heat transfer form.
Water loop system（Little dotted line frame）, comprise feed pipe, the temperature sensor that return pipe, and pipe-line system are installed
25, pressure transducer 24, flow transducer 26, water circulating pump 27, heat user 7 and constant pressure supply water and water treatment system 28.
The fused salt regenerative electrochemical heating central heating system of the present invention also includes controller 8, respectively with fused salt circuit system
With water loop system each sensor and power supply 8 connect.
Heat user 7 is the user side of heating, all can be heated using the municipal pipeline hot-water heating system reserved, and
And the end equipment of user also all need not change.
Using fused salt mixt as accumulation of heat working medium, carry out the fused salt regenerative electrochemical heating central heating of accumulation of heat using trough-electricity
System.In the low price trough-electricity period at night, by pump for liquid salts, the fused salt extraction in cold salt cellar being transported to fused salt electric heater will
Fused salt is heated to high temperature（About 500 DEG C about）After enter hot salt cellar, peak times of power consumption on daytime utilize pump for liquid salts by hot salt cellar
The high-temperature molten salt of accumulation heat is extracted out and is transported to fused salt-heating Aquatic product heat water of water- to-water heat exchanger heating municipal administration to resident's confession
Warm.For coal-burning boiler central heating system commonly used at present, as long as the boiler room of central heating system is transformed,
It is transformed into fused salt heat-lag time, municipal heating network and heating end-equipment are all not required to be transformed.
Evening 22:Morning 8 00 to next day:00, using the cold salt cellar of low ebb electrical heating（3）In low-temperature molten salt, wherein one
Divide to be stored in high temperature melting salt cellar and remain peak times of power consumption heating use, a part is directly entered brine heat exchanger and supplies for the paddy phase
Warm use；Next day 8:00 to evening 22:00, electric heating system quits work, and high-temperature molten salt is transported to by high-temperature molten salt pump startup
In brine heat exchanger, heating water is used for heating.
The invention has the beneficial effects as follows：The present invention is combined with electrical heating accumulation of heat using central heating, adopts hot simultaneously
Fused salt mixt that can be excellent is as heat storage medium.The liquid temperature wide ranges of fused salt, thermal capacity is big, and steam forces down, fused salt loop
System is safe and reliable, has superior heat storage performance, and nontoxic, cheap and easy to get.Evening fused salt is heated and renews energy
Get up, for the heating on daytime, take full advantage of valley period power power, alleviate electrical network peak-valley difference, saved the energy.By using the paddy phase
Electric power instead of coal combustion, reduces coal-fired usage amount, greatly reduces the pollution to air.
Brief description
Fig. 1 is the composition structure chart of the present invention；
In figure：1st, fused salt electric heater, 2, high warm salt cellar, 3, low temperature cold salt cellar, 4, low-temperature molten salt pump, 5 high-temperature molten salts
Pump, fused salt circuit system（Big dotted line frame）, 6, brine heat exchanger, 7, heat user, water loop system（Little dotted line frame）, 8, control
Device, 9, snakelike heating pipe, 10, molten salt heater outlet temperature sensor, 11, molten salt heater inlet temperature sensor, 12,
Hot salt cellar temperature sensor, 13 cold salt cellar temperature sensors, 14, hot salt cellar level monitoring mouth, 15, cold salt cellar level monitoring mouth,
16th, hot salt cellar salt outlet, 17, cold salt cellar salt outlet, 18, hot salt line-pressure sensor, 19, hot salt line temperature sensor,
20th, hot salt line flow sensor, 21, cold salt line-pressure sensor, 22, cold salt line temperature sensor, 23, cold salt pipeline
Flow transducer, 24, water loop system pressure sensor, 25, water loop system temperature sensor, 26, water loop flow system flow
Sensor, 27, water circulating pump, 28, constant pressure supply water and water treatment system, 29, power supply, 30 supply channels, 31, water return pipeline.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.
Embodiment 1
As shown in figure 1, a kind of employing fused salt heats central heating system as the regenerative electrochemical of accumulation of heat working medium, including offer
The power supply of electric energy, Molten salt heating system, fused salt heat reservoir, fused salt heat exchange system and district heating system, concrete structure is as follows：
Described fused salt electric heater 1 adopts snakelike pipe 9 as heating element heater, suffered thermal stress limit less, toggle speed faster,
Suitable power supply frequent start-stop and variable load operation demand.Described accumulation of heat working medium is fused salt mixt, and fused salt mixt has thermal capacity
Greatly, heat stability is good, and viscosity is low, and vapour pressure is little, liquid temperature wide ranges, many advantages, such as low cost, can be molten by heating
Trough-electricity is converted into high temperature heat and is stored in high-temperature molten salt by salt.Described fused salt heat reservoir adopts double-pot type arrangement knot
Structure, it includes the cold salt cellar 3 for storing low-temperature molten salt and the hot salt cellar 2 for storing high-temperature molten salt, both at cylinder
Structure, using stainless steel, dome lid, external insulation, is disposed vertically.Cold salt cellar 3 is used for stocking system initial start stage or fortune
Low-temperature molten salt after heat-exchange system heat release between the departure date, hot salt cellar 2 is used for high temperature after molten salt heater heat temperature raising for the storage
Fused salt；It is separately installed with two low-temperature molten salt pumps 4 and two high-temperature melting salt pumps 5 in cold salt cellar 3 and hot salt cellar 2 top, all adopt
The form of the using and the reserved, prevents due to fused salt failure of pump and causes the contingency of whole system to occur.Pump for liquid salts is major axis
Submerged pump, using the vertical installation in top.Cold salt cellar 3, hot salt cellar 2 is mounted on temperature sensor 12,13, for monitoring the two
Temperature.The two is equipped with level monitoring mouth 14,15, can feed back the safety levels of fused salt by liquid level sensor.Salt is tank bottoms
Portion is designed with the salt outlet 16,17 of fused salt, empties fused salt for when accident or conventional maintenance.
Described fused salt circuit system（Big dotted line frame）, comprise hot salt pipeline, cold salt pipeline, and the pressure sensing on pipeline
Device 18,21, temperature sensor 19,22, flow transducer 20,23.These sensors are by signal transmission to controller 8, controller 8
Then these signals comprehensive carry out the frequency of constantly regulate high-temperature melting salt pump 5 and low-temperature molten salt pump 4 to meet different operating conditions.Institute
The water loop system stated（Little dotted line frame）, comprise feed pipe, the pressure transducer 24 on return pipe and pipeline, temperature sensor
25, flow transducer 26, water circulating pump 27, heat user 7 and constant pressure supply water and water treatment system 28.
In addition, fused salt heat exchanging equipment all walks shell-side using fused salt, water under high pressure/steam walks the arrangement of tube side, thus greatly
Thinning greatly shell wall, cost-effective, also it is beneficial to when systematic failures or conventional maintenance empty fused salt simultaneously.
The operation principle of the present invention and to realize process as follows：
Taking Pekinese's time-of-use tariffs as a example, at night 22:00- morning 8:00, fused salt electric heater starts, and utilizes
The low-temperature molten salt that trough-electricity will be extracted out from cryogenic tank by low-temperature molten salt pump（It is about 200 DEG C about）It is heated to high temperature（It is about 500 DEG C
Left and right）, flow is imported and exported so that a part of high-temperature molten salt is stored in heat by the fused salt that flow transducer adjusts high warm salt cellar
In salt cellar, for the heating of peak times of power consumption, it is partly into brine heat exchanger, for the heating at night.Enter saline heat exchange
The high-temperature molten salt of device carries out heat exchange with municipal water use by forced convection form and heats municipal water use from 70 DEG C about of import
To 95 DEG C, the low-temperature molten salt after heat exchange returns to cold salt cellar, completes one cycle heat exchange.And the municipal water use after heating then enters point
Hydrophone, is assigned to each heat user end, and municipal water use completes one cycle, then come together in water collector, for high-temperature molten salt
Carry out heat exchange next time.On daytime 8:00- evening 22:00, electric heater is out of service, and the pump for liquid salts of hot salt cellar is constantly by height
Temperature molten salt is transported in brine heat exchanger, for the heat exchange of fused salt and municipal water use, realizes the heating of peak times of power consumption.Heat release is dropped
The fused salt of temperature then returns in low-temperature molten salt tank.
Whole system is all to be realized by microcomputer controller 8 Based Intelligent Control.This microcomputer controller is passed by temperature
The signal of the feedbacks such as sensor, flow transducer carrys out start and stop and the heating power of Intelligent adjustment fused salt electric heater, adjusts hot and cold salt
In tank, the frequency of pump for liquid salts is controlling the flow of fused salt to meet the different demands at heat user end.
Claims (6)
1. a kind of fused salt regenerative electrochemical heating central heating system it is characterised in that：Mainly include for making fused salt intensification heat accumulation
Fused salt electric heater (1), the hot salt cellar (2) of storage high-temperature molten salt, the storage cold salt cellar (3) of low-temperature molten salt, low-temperature molten salt pump
(4), high-temperature melting salt pump (5), carry out the brine heat exchanger (6) of heat exchange, heat user (7) for fused salt and water；
Fused salt electric heater (1) adopts snakelike pipe (9) as heating element heater, and there is housing the outside of snakelike pipe (9), on housing
It is provided with fused salt outlet and fused salt import, fused salt outlet is provided with molten salt heater outlet temperature sensor (10), and fused salt import is pacified
Equipped with molten salt heater inlet temperature sensor (11), for monitoring the temperature of heating fused salt, fused salt electric heater (1) snakelike
Pipe (9) is connected with power supply, for controlling the start and stop of electric heater；
The fused salt outlet of fused salt electric heater (1) is connected with the import of hot salt cellar (2) by pipeline, the outlet warp of hot salt cellar (2)
It is connected with the tube side import of brine heat exchanger (6) by high-temperature melting salt pump (5), tube side outlet and the cold salt cellar of brine heat exchanger (6)
(3) import is connected, and the outlet of cold salt cellar (3) is connected with the import of fused salt electric heater (1) via low-temperature molten salt pump (4), electricity
Heater (1), hot salt cellar (2), cold salt cellar (3), low-temperature molten salt pump (4), high-temperature melting salt pump (5), brine heat exchanger (6) are formed
Closure pipeline is fused salt loop；
The shell side of brine heat exchanger (6) passes through supply channel (30), water return pipeline (31) connects composition water loop with heat user,
Equipped with water loop system pressure sensor (24), water loop system temperature on supply channel at brine heat exchanger (6) shell-side outlet
Sensor (25), water loop flow system flow sensor (26), are provided with water circulating pump (27) and level pressure on water return pipeline (31)
Moisturizing and water treatment system (28)；Using fused salt mixt as accumulation of heat working medium；Brine heat exchanger (6) adopts tube shell type structure, melts
Salt is in pipe-line system, and water is in shell side system, and the two carries out heat exchange using forced-convection heat transfer form.
2. according to claim 1 fused salt regenerative electrochemical heating central heating system it is characterised in that：Hot salt cellar (2), cold salt cellar
(3) top is respectively mounted promising fused salt and provides the hot melt salt pump (5) of power, sloppy heat salt pump (4), and each jar top is provided with two
Platform pump for liquid salts, the using and the reserved.
3. according to claim 1 fused salt regenerative electrochemical heating central heating system it is characterised in that：Hot salt cellar (2) is upper to install
There is the hot salt cellar temperature sensor (12) for monitoring temperature, top is provided with the hot salt cellar level monitoring mouth for monitoring liquid level
(14), bottom is provided with the hot salt cellar salt outlet (16) for emptying fused salt；It is provided with for monitoring temperature on cold salt cellar (3)
Cold salt cellar temperature sensor (13), top is provided with cold salt cellar level monitoring mouth (15) for monitoring liquid level, and bottom is provided with
For emptying the cold salt cellar salt outlet (17) of fused salt.
4. according to claim 1 fused salt regenerative electrochemical heating central heating system it is characterised in that：Fused salt electric heater (1)
Hot salt line-pressure sensor (18), hot salt line temperature sensor (19), heat are provided with the pipeline and hot salt cellar (2) between
Salt line flow sensor (20), the pipeline between fused salt electric heater (1) and cold salt cellar (3) is provided with cold salt loine pressure
Sensor (21), cold salt line temperature sensor (22), cold salt line flow sensor (23).
5. according to claim 1 fused salt regenerative electrochemical heating central heating system it is characterised in that：Also include controller (8),
Respectively with fused salt circuit system and water loop system each sensor and power supply be connected.
6. according to claim 1 fused salt regenerative electrochemical heating central heating system it is characterised in that：Evening 22:00 to next day
Morning 8:00, using the low-temperature molten salt in the cold salt cellar of low ebb electrical heating (3), a portion is stored in high temperature melting salt cellar and remains
Peak times of power consumption heating uses, and a part is directly entered brine heat exchanger and uses for the heating of paddy phase；Next day 8:00 to evening 22:
00, electric heating system quits work, and high-temperature molten salt is transported to heating water in brine heat exchanger and is used for supplying by high-temperature molten salt pump startup
Warm.
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| CN201410093965.XA CN103836703B (en) | 2014-03-13 | 2014-03-13 | Fused salt regenerative electrochemical heats central heating system |
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| CN201410093965.XA CN103836703B (en) | 2014-03-13 | 2014-03-13 | Fused salt regenerative electrochemical heats central heating system |
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| CN103836703B true CN103836703B (en) | 2017-03-08 |
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| CN106026296A (en) * | 2016-07-22 | 2016-10-12 | 大工（青岛）新能源材料技术研究院有限公司 | Vehicle-mounted natural gas power generation mobile charging station |
| CN106091776A (en) * | 2016-08-09 | 2016-11-09 | 天津滨海储能技术有限公司 | Molten salt energy-storage heat-exchanger rig |
| CN106369655A (en) * | 2016-10-20 | 2017-02-01 | 中投亿星红日太阳能科技有限公司 | Fused salt heat accumulation type electric heating central heating system with middle evaporator |
| CN106524508B (en) * | 2016-12-07 | 2023-10-13 | 长春柯宁科技有限公司 | Control method of high-temperature molten salt and water intermittent heat exchange device |
| CN108613385A (en) * | 2016-12-09 | 2018-10-02 | 百吉瑞（天津）新能源有限公司 | A kind of fused salt aqueous solution energy-storage system |
| CN108266791A (en) * | 2016-12-30 | 2018-07-10 | 百吉瑞（天津）新能源有限公司 | A kind of molten salt energy-storage and electric boiler complementation heating system |
| CN207350892U (en) * | 2017-10-16 | 2018-05-11 | 深圳市爱能森科技有限公司 | One kind is provided multiple forms of energy to complement each other application system |
| CN108007246A (en) * | 2017-11-28 | 2018-05-08 | 北京工业大学 | The regulatable low ebb electrical heating fused salt of heat exchange amount stores heat-releasing device and application method |
| CN109916210A (en) * | 2017-12-12 | 2019-06-21 | 北京华业阳光新能源有限公司 | The fused salt heat reservoir of skid-mounted type |
| CN108266782A (en) * | 2018-01-10 | 2018-07-10 | 中国科学院理化技术研究所 | A kind of heating system |
| CN108426238A (en) * | 2018-03-20 | 2018-08-21 | 北京工业大学 | A kind of thermal power plant's fused salt storage heating system heated using main steam |
| CN108895526A (en) * | 2018-07-03 | 2018-11-27 | 上海电力学院 | A kind of electric heat storage formula heating system |
| CN110906415A (en) * | 2019-12-15 | 2020-03-24 | 张影 | Central heating system suitable for steel constructs building |
| CN115143550A (en) * | 2022-05-20 | 2022-10-04 | 华中科技大学 | Cold and hot combined supply system based on phase-change material |
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