CN106050305B - A method of fused salt is stored based on Anhydrite Ore goaf - Google Patents

A method of fused salt is stored based on Anhydrite Ore goaf Download PDF

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Publication number
CN106050305B
CN106050305B CN201610384347.XA CN201610384347A CN106050305B CN 106050305 B CN106050305 B CN 106050305B CN 201610384347 A CN201610384347 A CN 201610384347A CN 106050305 B CN106050305 B CN 106050305B
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Prior art keywords
fused salt
heat
foundation
steam
storage
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CN106050305A (en
Inventor
黄河
戚家忠
苗玉亮
郎宝华
胡振法
李祥飞
丰红波
陈跃武
郑司光
许浩
李军
韩喜子
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Anhui Hengtai New Material Co.,Ltd.
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ANHUI WANBEI COAL-ELECTRICITY GROUP Co Ltd HANSHAN HENGTAI NON-METAL MTERIALS BRANCH
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/16Modification of mine passages or chambers for storage purposes, especially for liquids or gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/02Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14Thermal energy storage

Abstract

The invention discloses a kind of methods storing fused salt based on Anhydrite Ore goaf.Include the following steps:The surface treatment in Anhydrite Ore goaf, the foundation of fused salt storage warehouse, the foundation of power generating and heating device, establish steam-driven generator system and heating system on the ground;Wherein, steam-driven generator system is connected to fused salt heat-storing device by pipeline;Steam-driven generator system further includes fused salt heat exchange system and installation detection device.The present invention is by using the Anhydrite Ore goaf after exploitation for storing fused salt, energy is stored by electrical heating or solar energy heating fused salt, heat supply and power supply are carried out by steam generating system, is solved in existing fused salt heat-storing device, the capacity of the tank of foundation is smaller, the fused salt amount of storage is also more low, the quantity of heat storage of fused salt heat accumulation is limited, and the up-right tank occupancy floor area established is larger, is easily influenced by environmental change, it needs periodically to safeguard, increases the cost of fused salt heat reservoir.

Description

A method of fused salt is stored based on Anhydrite Ore goaf
Technical field
The invention belongs to Anhydrite Ore geological storage technical fields, are stored up based on Anhydrite Ore goaf more particularly to one kind The method for depositing fused salt.
Background technology
In photo-thermal power station exploitation, fused salt is as a kind of heat transfer of better performances, heat accumulation working media, it has also become current light Thermo-power station realizes the important leverage of long-time stable power generation.Fuse salt is the good high temperature of a kind of at low cost, long lifespan, heat exchange property (be more than 500 DEG C), high heat-flux (being more than 105W/ ㎡) and low pressure (<2bar) heat transfer medium.One traditional 50MW photo-thermal project Heat reservoir include hot tank and two, cold tank, 70 feet of diameter, high about 30 feet of jar.City is applied in direct storing up electricity , ready-made industrial electric heater unit can be utilized to heat about 5000 tons in jar of fused salt, in the other end, steam turbine extraction Energy in jar generates electricity.
Fused salt heat reservoir using double tank sensible heat energy storage modes, using Molten Binary Salts (40%KNO3-60%NaNO3) as Heat accumulation and heat transfer medium have two kinds of operating modes of heat accumulation and heat release.When heat release, have generation heating hot water and high-temperature steam two Kind function.Its operational process is:
(1) when heat accumulation, low-temperature molten salt pump is extracted sloppy heat salt out feeding electric furnace from cold tank and is heated, obtained high temperature Fused salt flows into hot tank storage.
(2) when heat release, the high-temperature molten salt in hot tank is transported in heating heat exchanger or steam generator by high-temperature melting salt pump It exchanges heat with water/steam, low-temperature molten salt after cooling is flowed into cold tank and stored.Heat heat exchanger or steam generator point simultaneously Not not externally output heating hot water or high-temperature steam.
Existing fused salt heat reservoir is mostly to establish multigroup up-right tank on ground to be stored, and heat reservoir uses double-pot type Heat accumulation.Since the capacity of the tank of foundation is smaller, the fused salt amount of storage is also more low, limits the quantity of heat storage of fused salt heat accumulation, and The up-right tank occupancy floor area of foundation is larger, is easily influenced by environmental change, needs periodically to safeguard, increases fused salt storage The cost of hot systems.
Invention content
The present invention is a kind of method storing fused salt based on Anhydrite Ore goaf, by using the Anhydrite Ore after exploitation Goaf stores energy for storing fused salt, by electrical heating or solar energy heating fused salt, is supplied by steam generating system Heat and power supply, solve in existing fused salt heat-storing device, and the capacity of the tank of foundation is smaller, and the fused salt amount of storage is also more low, limit The quantity of heat storage of fused salt heat accumulation is made.
The present invention provides method of the Anhydrite Ore goaf in terms of energy storage, storing, include the following steps:
The surface treatment in a Anhydrite Ores goaf:Ground rubble in main tunnel, dust debris are cleaned out, then are led to The cleaning that high pressure water carries out surface is crossed, and is air-dried by wind turbine air blast;
The foundation of b fused salt storage warehouses:Branch tunnel inner surface in Anhydrite Ore goaf fixes one layer of thermal insulation layer;It is described every One layer of heat preservation layer is adhered on the surface of thermosphere;
Wherein, it is fixed with fused salt heat-storing device in Anhydrite Ore goaf is per adjacent pair branch tunnel;A pair of of branch tunnel In, the fused salt heat storage can in one of branch tunnel is used to store the low-temperature storage tank of low-temperature molten salt, molten in another branch tunnel Salt heat storage can is used to store the high temperature storage tank of high-temperature molten salt.
The foundation of c power generating and heating devices:Steam-driven generator system and heating system are established on the ground;
Wherein, steam-driven generator system is connected to fused salt heat-storing device by pipeline;Steam-driven generator system further includes melting Salt heat-exchange system.
D installs detection device:Temperature sensor, flammable gas alarm and powder are separately installed in main tunnel and hoistway Dirt detector.
Further, in the foundation of the step b fused salt storage warehouses, the thermal insulation layer uses high temperature insulating material;It is described Insulating layer uses heat-preservation cotton.
Further, in the foundation of the step b fused salt storage warehouses, fused salt heat-storing device includes that one and branch tunnel coordinate Bar shaped tank is equipped with pump for liquid salts in one end of tank.
The invention has the advantages that:
The present invention makes full use of Anhydrite Ore goaf to be applied in terms of energy storage, storing, the side of Gypsum Mine energy storage or storing Formula has the characteristics that Economization on land, with good investment, operation staffing is few, safe, environmental pollution is few, service life is long.Pass through profit With the Anhydrite Ore goaf after exploitation for storing fused salt, energy is stored by electrical heating or solar energy heating fused salt, is passed through Steam generating system carries out heat supply and power supply, solves in existing fused salt heat-storing device, the capacity of the tank of foundation is smaller, storage Fused salt amount is also more low, limits the quantity of heat storage of fused salt heat accumulation, and the up-right tank occupancy floor area established is larger, Yi Shouhuan The influence of border variation, needs periodically to safeguard, increases the cost of fused salt heat reservoir.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.
Fig. 1 is the layout drawing in the main tunnel and entry well in the Anhydrite Ore goaf of the present invention;
Fig. 2 is the cross-sectional view in the branch tunnel in the Anhydrite Ore goaf of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained all other without creative efforts Embodiment shall fall within the protection scope of the present invention.
It please referring to Fig.1 with shown in Fig. 2, the present invention is a kind of method storing fused salt based on Anhydrite Ore goaf, including Following steps:
(1) surface treatment in Anhydrite Ore goaf:Ground rubble in main tunnel 4, dust debris are cleaned out, then The cleaning on surface is carried out by high pressure water, and is air-dried by wind turbine air blast;
(2) foundation of fused salt storage warehouse:5 inner surface of branch tunnel in Anhydrite Ore goaf fixes one layer of thermal insulation layer 501; The surface attachment one layer of heat preservation layer 502 of thermal insulation layer 501;Thermal insulation layer 501 uses high temperature insulating material;Insulating layer 502 is using heat preservation Cotton.Fused salt heat-storing device includes a bar shaped tank coordinated with branch tunnel 5, and pump for liquid salts is equipped in one end of tank.All devices are equal It is transported by the elevator device 2 in Anhydrite Ore hoistway 3.
Wherein, it is fixed with fused salt heat-storing device in Anhydrite Ore goaf is per adjacent pair branch tunnel 5;A pair of of branch tunnel In 5, fused salt heat storage can in one of branch tunnel 5 is used to store the low-temperature storage tank of low-temperature molten salt, in another branch tunnel 5 Fused salt heat storage can is used to store the high temperature storage tank of high-temperature molten salt.
Wherein, low-temperature storage tank is equipped with low-temperature molten salt pump, and high temperature storage tank is equipped with high-temperature melting salt pump;Pump for liquid salts installation site For close to the position on 5 ground of branch tunnel.
(3) foundation of power generating and heating device:Steam-driven generator system 101 and heating system 102 are established on ground 1;Its In, steam-driven generator system 101 is connected to fused salt heat-storing device by pipeline;Steam-driven generator system 101 further includes that fused salt changes Hot systems.
(4) detection device is installed:It is separately installed with temperature sensor, flammable gas alarm in main tunnel 4 and hoistway 3 And dust detector.
Patent CN201310167760.7 (《Fused salt heat accumulation and heat-exchange system for solar energy thermal-power-generating》) in provide A technique for heat exchange power generation is carried out by way of fused salt heat accumulation based on solar energy thermal-power-generating.Based on Anhydrite Ore goaf The mode of storage fused salt is the offset by the way that the high temperature storage tank and low-temperature storage tank of fused salt heat accumulation to be placed on to Anhydrite Ore goaf In road 5, since the mining depth of Anhydrite Ore is in the depth of 300-500m, the temperature in the branch tunnel 5 of Anhydrite Ore compares It is constant, it is free from the influence of the external environment so that the temperature control of fused salt is relatively easy to, the maintenance to holding vessel is reduced, moreover, The tank body of fused salt heat accumulation is arranged in sub-terrain mines hole, the occupied area on ground 1 is reduced, moreover, not can cause environmental pollution.
The Anhydrite Ore storage fused salt principle be:Including fused salt heat reservoir and fused salt heat exchange system;
Wherein, the heat-storing device of fused salt heat reservoir is arranged in the branch tunnel 5 of Anhydrite Ore, and in anhydrite ore mining 5 inner surface of branch tunnel of dead zone fixes one layer of thermal insulation layer 501;The surface attachment one layer of heat preservation layer 502 of thermal insulation layer 501, by every Thermosphere 501 stops the heat loss of fused salt heat accumulation, avoids the surface to mine hole the temperature difference is caused to corrode, and is used using insulating layer 502 It is kept the temperature in the tank body to fused salt heat accumulation;
Wherein, fused salt heat exchange system is arranged on ground 1, steam-driven generator system 101 and heat supply system is established on ground 1 System 102;Wherein, steam-driven generator system 101 is connected to fused salt heat-storing device by pipeline;Steam-driven generator system 101 is also wrapped Include fused salt heat exchange system.Fused salt heat exchange system is mounted on the intersection in main tunnel 4 and hoistway 3, by high-temperature melting salt pump by high temperature Fused salt (temperature is generally at 500-600 DEG C) and the shell-and-tube heat exchanger of fused salt heat exchange system exchange heat, and water heating evaporation is produced Raw steam is used for heat supply for pushing steam-driven generator rotation power generation, or by the hot water of generation.
Wherein, for the heating of fused salt, the heating to fused salt is generally carried out using alternating current or photovoltaic or the electricity of wind energy, is carried out Preliminary temperature rise, the granular fused salt for being be melted into liquid, preparative course will carry out in low-temperature storage tank, Fused salt is tentatively heated to preliminary temperature (range of the temperature at 380-450 DEG C) by heating device, then is pumped by low-temperature molten salt Low-temperature molten salt is pumped into high temperature storage tank, is further being heated.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means Specific features described in conjunction with this embodiment or example, structure, material live at least one implementation that feature is contained in the present invention In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example. Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification, It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the present invention Principle and practical application, to enable skilled artisan to be best understood by and utilize the present invention.The present invention is only It is limited by claims and its full scope and equivalent.

Claims (1)

1. a kind of method storing fused salt based on Anhydrite Ore goaf, which is characterized in that include the following steps:
The surface treatment in a Anhydrite Ores goaf:Ground rubble in main tunnel (4), dust debris are cleaned out, then passed through High pressure water carries out the cleaning on surface, and is air-dried by wind turbine air blast;
The foundation of b fused salt storage warehouses:Branch tunnel (5) inner surface in Anhydrite Ore goaf fixes one layer of thermal insulation layer (501);Institute State the surface attachment one layer of heat preservation layer (502) of thermal insulation layer (501);Wherein, in Anhydrite Ore goaf per adjacent pair branch tunnel (5) fused salt heat-storing device is fixed in;
All devices are transported by the elevator device in Anhydrite Ore hoistway;In a pair of of branch tunnel, one of offset Fused salt heat storage can in road is the low-temperature storage tank for storing low-temperature molten salt, the fused salt heat storage can in another branch tunnel be for Store the high temperature storage tank of high-temperature molten salt;Wherein, low-temperature storage tank is equipped with low-temperature molten salt pump, and high temperature storage tank is equipped with high-temperature molten salt Pump;Pump for liquid salts installation site is close to the position on offset road ground;
The foundation of c power generating and heating devices:Steam-driven generator system (101) and heating system (102) are established on ground (1);Its In, steam-driven generator system (101) is connected to fused salt heat-storing device by pipeline;
D installs detection device:Be separately installed in main tunnel (4) and hoistway (3) temperature sensor, flammable gas alarm and Dust detector;
In the foundation of the step b fused salt storage warehouses, the thermal insulation layer (501) uses high temperature insulating material;The insulating layer (502) heat-preservation cotton is used;
In the foundation of the step b fused salt storage warehouses, fused salt heat-storing device includes the bar shaped tank of one and branch tunnel (5) cooperation, One end of tank is equipped with pump for liquid salts.
CN201610384347.XA 2016-05-30 2016-05-30 A method of fused salt is stored based on Anhydrite Ore goaf Active CN106050305B (en)

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CN115574363B (en) * 2022-10-11 2023-09-19 西安科技大学 Light-wind energy development and utilization system and method based on coal mine goaf heat storage

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Denomination of invention: Method for storing molten salt based on gob of anhydrite mine

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Patentee before: HANSHAN HENGTAI NON-METALLIC MATERIALS BRANCH OF ANHUI WANBEI COAL-ELECTRICITY GROUP Co.,Ltd.