CN105115336A - Molten salt thermal storage heater - Google Patents
Molten salt thermal storage heater Download PDFInfo
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- CN105115336A CN105115336A CN201510562072.XA CN201510562072A CN105115336A CN 105115336 A CN105115336 A CN 105115336A CN 201510562072 A CN201510562072 A CN 201510562072A CN 105115336 A CN105115336 A CN 105115336A
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- tank body
- molten salt
- fused salt
- heat
- heat exchange
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
A molten salt thermal storage heater comprises a tank body, a molten salt temperature measurement device, a molten salt adding hole, a molten salt liquid level measurement device and an atmosphere vent hole welded on the top of the tank body, wherein molten salt is disposed inside the tank body, a resistance heater auto-control system is disposed inside the molten salt, the resistance heater auto-control system comprises a high-sensitivity molten salt temperature detection component, a PLC programmable controller, frequency-converting control of a feed pump and an auto-switching component used in thermal storage and thermal discharge of a molten salt thermal storage system, a heat exchange coil pipe is disposed inside the molten salt of the tank body, and an inlet and an outlet of the heat exchange coil pipe respectively pass through the middle and the top of the tank body. The device provided by the invention perfectively places the heat exchange coil pipe inside a thermal storage medium and gets rid of necessary dependency on using air as a heat-transfer fluid, so as to realize direct heat exchange between the thermal storage medium and steam or hot water. In this way, a heat transfer coefficient and system thermal efficiency are increased to the optimal level, equipment volume is reduced greatly, equipment losses are also reduced, and social and economic benefits become better.
Description
Technical field
The present invention relates to electric heat storage technology field, be specifically related to a kind of fused salt storage heater.
Background technology
Along with the high speed development of Chinese national economy and the raising day by day of living standards of the people, in the whole nation, many areas occur seasonal power's shortage phenomenon.China's power industry is adapt to the demand of national economy also in fast development, constantly increases installed capacity, constantly improves operation of power networks efficiency and managerial skills.But along with the lasting of various places power consumption is risen, electricity consumption peak value is constantly refreshed.Meanwhile, the peak-valley difference of electrical network is also widening, and this not only causes electrical network efficiency to decline, the loss of electrical network, and serious threat is to the safety of electrical network.Although Generation Side can peak regulation, its peak modulation capacity is limited, and to sacrifice unit durability, energy utilization rate, with high investment etc. for cost.
Electricity energy accumulating technique is solve electrical network peak-valley difference and environmental issue at present the most direct, real and effective means.Existing heat storage technology mainly contains two kinds: solid oxidation magnesium gitter brick+air and water-to-water heat exchanger, boilers heated electrically+hot water storage tank.Existing heat storage technology has many critical defects that cannot promote: concerning solid oxidation magnesium gitter brick+air and water-to-water heat exchanger, because it is as heat transfer medium by air, cold air enters in gitter brick and is heated to about 750 DEG C, the principle that enters air-water heat exchanger heat release is subsequently carried out designing and is run, the coefficient of heat transfer of air is very little, therefore the hot water of its most applicable generation less than 85 DEG C is used for heating, and if steam will be produced, its steam pressure is often very low and equipment is huge, and steam can not be produced for industrial production, simultaneously, production due to solid oxidation magnesium gitter brick is high pollution industry, from stricti jurise, it can not can be regarded as energy-conserving product, concerning boilers heated electrically+hot water storage tank, because the storage temperature of water is lower, under normal pressure, its optimum temperature is less than 90 DEG C, when temperature is higher, its pressure is very big, dangerous excessive, therefore, the heat storage capacity of its same volume is limited, in order to improve its heat storage capacity, often need hot water storage tank do very large, floor space is comparatively large, simultaneously, it also can only produce the hot water of less than 85 DEG C for heating, and can not produce steam for industrial production.
Summary of the invention
The invention provides a kind of fused salt storage heater, to solve the problem that heat transfer coefficient is little and heat storage efficiency is low that prior art exists.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of fused salt storage heater, comprise tank body, tank body is docked by cylinder and ellipse head and is welded, temperature of molten salt measurement mechanism, fused salt adds entrance, liquid fused salt level measuring arrangement and atmosphere entry are welded on the top of tank body, the built-in fused salt of tank body, resistance heater robot control system(RCS) is built in fused salt, resistance heater robot control system(RCS) comprises high sensitivity temperature of molten salt detecting element, PLC programmable controller, the VFC of feed pump and the automatic switchover element of fused salt hold over system heat-accumulating process and exothermic process, heat exchange coil is built in the fused salt of tank body, the import of heat exchange coil and outlet are each passed through in the middle part of tank body and tank body top.
Above-mentioned fused salt is mixed by potassium nitrate, natrium nitrosum and sodium nitrate and forms, and wherein potassium nitrate mass content is 53%, and natrium nitrosum mass content is 40%, and sodium nitrate mass content is 7%.
Above-mentioned heat exchange coil adopts material to be the seamless steel tubes and pipes for high pressure boiler of 12Cr1MoVG, and the butt weld of coil pipe adopts argon arc welding full penetration, and 100% ray detection is carried out in butt weld.
Above-mentioned tank body outer surface arranges thermal insulating warm-keeping layer, and thermal insulating warm-keeping layer is super glass wool heat-insulation layer.
The operation principle of apparatus of the present invention is: accumulation of heat molten salt heater is fully automatic operation, when night cheap low-valley interval automatically cut accumulation of heat shape body, until stop when reaching the accumulation of heat end of a period state of setting, or automatically cut off accumulation of heat to peak interval of time in morning.Temperature of molten salt after accumulation of heat can up to 450 DEG C ~ 500 DEG C (this temperature user can sets itself), in electrical network peak period, heat transmission is completed by carrying out heat exchange with the demineralized water in heat exchanger tube, the saturated vapor or the hot water that become user's setting after demineralized water endothermic heat are sent to process unit, the heat energy stored discharges gradually, instead of user and use high price electric power peak period at electrical network, reach the double effects saved demand charge and shift peak power, exploitation valley power consumption.This invention design is a kind of energy-saving environmental protection device of optimizing allocation of resources and preserving the ecological environment.Accumulation of heat molten salt heater can also have following function: if this using energy source of user is less, be not finished during the heat peak valley on the same day stored, can continue to store, night, low-valley interval thermal storage time also decreased simultaneously, and its accumulation of heat exothermic process is full-automatic unmanned on duty.
Heat exchange coil perfection is placed in heat storage medium inside by apparatus of the present invention, has broken away from the dependence of necessary employing air as heat-transfer fluid, thus has achieved the direct heat transfer of heat storage medium and steam or hot water, heat transfer coefficient and and system thermal efficiency be increased to the best.Decrease air and the water-to-water heat exchanger of prior art, be equivalent to demineralized water and fused salt direct heat transfer, decrease number of devices, decrease system heat loss simultaneously, its heat transfer effect is better, and the thermal efficiency can be increased to more than 99%.Huge hot water storage tank is substituted for by adopting fused salt storage tank, its regenerator temperature can be increased to 450 DEG C to 500 DEG C by less than present 90 DEG C (water tank heat storage), and the fused salt of unit volume is compared with the water of same volume, its heat storage capacity is higher, therefore, greatly reduce equipment volume, decrease simultaneously equipment loss, social benefit and economic benefit better.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of apparatus of the present invention.
In figure, 1 tank body, 2 resistance heater robot control system(RCS)s, 3 heat exchange coils, 4 fused salts, 5 temperature of molten salt measurement mechanisms, 6 fused salts add entrance, 7 liquid fused salt level measuring arrangements, 8 atmosphere entrys, 9 thermal insulating warm-keeping layers.
Detailed description of the invention
As shown in the figure, a kind of fused salt storage heater, comprise tank body 1, tank body 1 is docked by cylinder and ellipse head and is welded, temperature of molten salt measurement mechanism 5, fused salt adds entrance 6, liquid fused salt level measuring arrangement 7 and atmosphere entry 8 are welded on the top of tank body 1, the built-in fused salt 4 of tank body 1, fused salt 4 is by potassium nitrate, natrium nitrosum and sodium nitrate mixing composition, wherein potassium nitrate mass content is 53%, natrium nitrosum mass content is 40%, sodium nitrate mass content is 7%, under normal pressure, its fusing point is 142 DEG C, boiling point is 680 DEG C, maximum operation (service) temperature is 530 DEG C, liquid averag density is 1762Kg/m3, specific heat is 0.34Kcal/Kg, resistance heater robot control system(RCS) 2 is built in fused salt 4, resistance heater robot control system(RCS) 2 comprises high sensitivity temperature of molten salt detecting element, PLC programmable controller, the VFC of feed pump and the automatic switchover element of fused salt hold over system heat-accumulating process and exothermic process, and user carries out operation monitoring, parameter modification, data acquisition etc. eventually through this intelligence control system to the heat-accumulating process of fused salt and whole device.And carry out exchanges data by communication interface and user's host computer; Heat exchange coil 3 is built in the fused salt 4 of tank body 1, the import of heat exchange coil 3 and outlet are each passed through in the middle part of tank body and tank body top, heat exchange coil 3 adopts material to be the seamless steel tubes and pipes for high pressure boiler of 12Cr1MoVG, the butt weld of coil pipe adopts argon arc welding full penetration, and 100% ray detection is carried out in butt weld.The making quality of heat exchanger tube adopts highest standard and requirement, and its security is guaranteed.Meanwhile, as the heat exchange core component of external quantity of heat given up, the number of its magnitude setting is vital.According to fused salt accumulation of heat finishing temperature and the heat release finishing temperature of setting, calculate through accurately detailed heat exchange, determine the heat exchange area of heat exchanger tube, and then determine the coil lengths needing layout, thus ensure the stable saturated vapor or the hot water that export user's setting; Tank body 1 outer surface arranges thermal insulating warm-keeping layer 9, thermal insulating warm-keeping layer 9 is super glass wool heat-insulation layer, through insulation thickness and the meticulous insulation treatment of details of heat exchange calculating, ensure that accumulation of heat temperature of molten salt only has about 35 DEG C up to equipment surface temperature when 500 DEG C, basic consistent with body sense, the surface losses of equipment is down to minimum by excellent heat insulation effect.
The operation principle of apparatus of the present invention is: accumulation of heat molten salt heater is fully automatic operation, when night cheap low-valley interval automatically cut accumulation of heat shape body, until stop when reaching the accumulation of heat end of a period state of setting, or automatically cut off accumulation of heat to peak interval of time in morning.Temperature of molten salt after accumulation of heat can up to 450 DEG C ~ 500 DEG C (this temperature user can sets itself), in electrical network peak period, heat transmission is completed by carrying out heat exchange with the demineralized water in heat exchanger tube, the saturated vapor or the hot water that become user's setting after demineralized water endothermic heat are sent to process unit, the heat energy stored discharges gradually, instead of user and use high price electric power peak period at electrical network, reach the double effects saved demand charge and shift peak power, exploitation valley power consumption.This invention design is a kind of energy-saving environmental protection device of optimizing allocation of resources and preserving the ecological environment.Accumulation of heat molten salt heater can also have following function: if this using energy source of user is less, be not finished during the heat peak valley on the same day stored, can continue to store, night, low-valley interval thermal storage time also decreased simultaneously, and its accumulation of heat exothermic process is full-automatic unmanned on duty.
Claims (4)
1. a fused salt storage heater, it is characterized in that comprising tank body, tank body is docked by cylinder and ellipse head and is welded, temperature of molten salt measurement mechanism, fused salt adds entrance, liquid fused salt level measuring arrangement and atmosphere entry are welded on the top of tank body, the built-in fused salt of tank body, resistance heater robot control system(RCS) is built in fused salt, resistance heater robot control system(RCS) comprises high sensitivity temperature of molten salt detecting element, PLC programmable controller, the VFC of feed pump and the automatic switchover element of fused salt hold over system heat-accumulating process and exothermic process, heat exchange coil is built in the fused salt of tank body, the import of heat exchange coil and outlet are each passed through in the middle part of tank body and tank body top.
2. fused salt storage heater according to claim 1, it is characterized in that fused salt is mixed by potassium nitrate, natrium nitrosum and sodium nitrate and form, wherein potassium nitrate mass content is 53%, and natrium nitrosum mass content is 40%, and sodium nitrate mass content is 7%.
3. fused salt storage heater according to claim 1, is characterized in that heat exchange coil adopts material to be the seamless steel tubes and pipes for high pressure boiler of 12Cr1MoVG, and the butt weld of coil pipe adopts argon arc welding full penetration, and 100% ray detection is carried out in butt weld.
4. fused salt storage heater according to claim 1, is characterized in that tank body outer surface arranges thermal insulating warm-keeping layer, and thermal insulating warm-keeping layer is super glass wool heat-insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510562072.XA CN105115336A (en) | 2015-09-07 | 2015-09-07 | Molten salt thermal storage heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510562072.XA CN105115336A (en) | 2015-09-07 | 2015-09-07 | Molten salt thermal storage heater |
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| CN105115336A true CN105115336A (en) | 2015-12-02 |
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| CN201510562072.XA Pending CN105115336A (en) | 2015-09-07 | 2015-09-07 | Molten salt thermal storage heater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107781990A (en) * | 2016-08-31 | 2018-03-09 | 潍坊昌盛硝盐有限公司 | A kind of fused salt energy conversion system |
| CN112963211A (en) * | 2021-03-26 | 2021-06-15 | 华能江阴燃机热电有限责任公司 | Steam turbine of cogeneration system |
| CN113551415A (en) * | 2021-07-22 | 2021-10-26 | 河南工学院 | Internal circulation bidirectional heating integrated energy storage heat release equipment |
| CN117109346A (en) * | 2023-10-25 | 2023-11-24 | 国网江苏省电力有限公司常州供电分公司 | Steam heat storage tank and heat preservation device thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58102097A (en) * | 1981-12-14 | 1983-06-17 | Matsushita Electric Ind Co Ltd | Heat accumulator |
| US4535837A (en) * | 1983-03-02 | 1985-08-20 | Matsushita Electric Industrial Co., Ltd. | Latent heat storage device |
| CN102585779A (en) * | 2011-11-18 | 2012-07-18 | 牟邦志 | Preparation method of high-purity heat-conduction energy storage molten salt |
| CN103105085A (en) * | 2013-02-01 | 2013-05-15 | 北京工业大学 | Automobile tail gas waste heat recovery fused salt heat transfer and heat storage heat exchanger |
| CN103994683A (en) * | 2014-05-21 | 2014-08-20 | 武汉理工大学 | High-temperature smoke waste heat recycling and storing device and method |
| CN203949396U (en) * | 2014-03-26 | 2014-11-19 | 北京工业大学 | A kind of single tank energy storage equipment |
| CN204084826U (en) * | 2014-06-11 | 2015-01-07 | 合肥万和电气有限公司 | Phase-change heat storage electric water heater |
| CN205066533U (en) * | 2015-09-07 | 2016-03-02 | 河北艺能锅炉有限责任公司 | Fused salt heat accumulation heater |
-
2015
- 2015-09-07 CN CN201510562072.XA patent/CN105115336A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58102097A (en) * | 1981-12-14 | 1983-06-17 | Matsushita Electric Ind Co Ltd | Heat accumulator |
| US4535837A (en) * | 1983-03-02 | 1985-08-20 | Matsushita Electric Industrial Co., Ltd. | Latent heat storage device |
| CN102585779A (en) * | 2011-11-18 | 2012-07-18 | 牟邦志 | Preparation method of high-purity heat-conduction energy storage molten salt |
| CN103105085A (en) * | 2013-02-01 | 2013-05-15 | 北京工业大学 | Automobile tail gas waste heat recovery fused salt heat transfer and heat storage heat exchanger |
| CN203949396U (en) * | 2014-03-26 | 2014-11-19 | 北京工业大学 | A kind of single tank energy storage equipment |
| CN103994683A (en) * | 2014-05-21 | 2014-08-20 | 武汉理工大学 | High-temperature smoke waste heat recycling and storing device and method |
| CN204084826U (en) * | 2014-06-11 | 2015-01-07 | 合肥万和电气有限公司 | Phase-change heat storage electric water heater |
| CN205066533U (en) * | 2015-09-07 | 2016-03-02 | 河北艺能锅炉有限责任公司 | Fused salt heat accumulation heater |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107781990A (en) * | 2016-08-31 | 2018-03-09 | 潍坊昌盛硝盐有限公司 | A kind of fused salt energy conversion system |
| CN112963211A (en) * | 2021-03-26 | 2021-06-15 | 华能江阴燃机热电有限责任公司 | Steam turbine of cogeneration system |
| CN113551415A (en) * | 2021-07-22 | 2021-10-26 | 河南工学院 | Internal circulation bidirectional heating integrated energy storage heat release equipment |
| CN117109346A (en) * | 2023-10-25 | 2023-11-24 | 国网江苏省电力有限公司常州供电分公司 | Steam heat storage tank and heat preservation device thereof |
| CN117109346B (en) * | 2023-10-25 | 2024-01-02 | 国网江苏省电力有限公司常州供电分公司 | Steam heat storage tank and heat preservation device thereof |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20151202 |