CN102261299A - Method for performing energy storage and electricity generation by utilizing underground mines - Google Patents
Method for performing energy storage and electricity generation by utilizing underground mines Download PDFInfo
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a method for performing energy storage and electricity generation by utilizing underground mines. An energy-storage electricity-generation method with low equipment investment and high energy source conversion rate does not exist at present. The method comprises an energy storage step and an electricity generation step; in the energy storage step, a reversible pump turbine is driven to operate by electric energy when the electric power of an external power grid is rich in a peak valley electricity leveling procedure; water in an opening cavity is injected into a seal cavity; after the reversible pump turbine stops operating, the air pressure in the seal cavity is adjusted to be a designed preset value between 1 and 30MPa; and in the electricity generation step, water in the seal cavity is discharged into the opening cavity through a feed pipeline and a discharge pipeline under the action of the air pressure in the seal cavity; the discharged water drives the reversible pump turbine to generate electricity and the electric energy generated by the reversible pump turbine is combined into the external power grid with deficient electricity. In the method, the equipment investment is low, the operation is simple, energy source conversion rate is high, and peak valley electricity of power grids and wind power can be utilized effectively.
Description
Technical field
The present invention relates to a kind of method of energy storage power generation, especially relate to a kind of method of utilizing the sub-terrain mines hole to carry out energy storage power generation, mainly water is transported in the sub-terrain mines hole by motor-drive pump, by carrying the water enter to compress the purpose that air in the sub-terrain mines hole reaches accumulation of energy, by the high-pressure air in the sub-terrain mines hole water is transported to the purpose that reaches generator for electricity generation in the hydraulic turbine generator, belongs to the hydraulic power generation technology field.
Background technique
Electric energy more and more becomes the people work and the indispensable energy of living, and still, the ubiquitous contradictory phenomena of a kind of worldwide is arranged at present, and Here it is daytime, people's power consumption was big, even electrical network puts into high gear to generate electricity, still supply falls short of demand for electric power; And the power consumption in evening descends greatly, even electrical network reduces generating capacity as possible, electric power still has bigger residue.This mainly is to carry out by day because of industrial production, people's learning life and social activities are also carried out basically by day, it is bigger than the power consumption in evening that current heating refrigeration also shows as daytime, in this case, electrical network comprises hydroelectric power, atomic power nuclear energy power generation, solar energy and wind energy power, raw mineral materials generating, the operation even put into high gear, also supply falls short of demand for electric power, therefore has to draw electricity, rations the power supply, thereby bring greater inconvenience for people's work, life.And to evening, people sleep and have had a rest, and power consumption has just descended greatly, even electrical network reduces the also have more than is needed electric power that sends of generating capacity, for example hydroelectric power, nuclear power, wind-power electricity generation etc. as possible.So for power network, a kind of peak valley electrical phenomena has appearred, be the power consumption peak period daytime, be the power consumption paddy electricity phase evening, power department has been thought thousand and one way for the balance generating capacity, as peak valley electricity non-equivalence, implements electricity consumption in night etc. for some high power consumption units, but these methods can not well solve the electric power distribution problem in daytime and evening, and electric energy is difficult to reach and makes full use of.
Before many decades, released a kind of pumped-storage power generation technology, this has played very big effect for solving the peak valley electricity, so-called pumped-storage power generation is exactly when the electrical network electric energy is rich, the electric power of affluence is used for water lift, promptly be extracted into being positioned among the mountain top reservoir on the mountain top of specially building by pump handle water, expending dump power in the electrical network drives reversible pump turbine and carries out water lift, water is brought up in the reservoir of mountain top, increased the potential energy of this part water body, for example pumped-storage power generation station, waste level ground, sky, Zhejiang is exactly when grid power is rich water to be brought up in more than the 600 meter high mountain top reservoir, to reach the purpose of stored energy, it pumped-storage power generation station, waste level ground is a large-scale pumped storage power power station that is located in the Anji, Zhejiang, 1,800,000 kilowatts of power station total installations of generating capacity, annual electricity generating capacity 31.6 hundred million kilowatt hours, total investment of engineering 73.77 hundred million RMB, just be constructed and put into operation through construction in 8 years, be the second in the world, Asia first, the work that can be rated as century, on the power station, the lower storage reservoir drop is 607 meters, upper storage reservoir is positioned at the mountain peak on the waste level ground, sky of height above sea level km, after the retaining, the lake surface area reaches 28 hectares, be one round the clock water level height luffing reach dynamic lake more than 29 meters; And when the power tense in the electrical network, again the water that is arranged in the mountain top reservoir is put down from pipeline, and generate electricity by reversible pump turbine, feed back to and go in the electrical network, the potential energy that is about to be arranged in the water body of mountain top reservoir is converted into electric energy.Though the electric power resource of pumped-storage power generation method in can balanced electrical network, but artificial reservior need be built in the pumped-storage power generation station on the mountain top, therefore investment is very big, and it is also bigger to the ground environment damage, there is bigger drawback in the pumped-storage power generation method, but present people also do not have the electric power resource in the next balanced electrical network of other better way.
Wind-powered electricity generation is more and more come into one's own by people as the renewable energy sources of cleaning, but there is a very large bottleneck problem in wind-power electricity generation, convert wind energy to electric energy with wind energy conversion system, because wind is constantly to change wind speed and direction, causing wind-powered electricity generation is extremely unsettled power supply, the grid power quality damages these characteristics of wind-powered electricity generation to requiring stably, so wind-powered electricity generation online, the bottleneck place of this wind-powered electricity generation online are just usually refused or limited to electrical network.Wind energy is calculated by following formula by the electric power that wind-driven generator sends:
P＝0.5·ρ·A·v
3·ξ
ρ in the following formula represents the density of fluid, in wind-power electricity generation the density of air, ξ represents utilization ratio of wind energy, A represents the blade swept area of wind energy conversion system, v represents wind speed, the generated energy that shows wind-driven generator by this formula is directly proportional with the cube of wind speed, Fig. 1 describes the graph of relation between the wind speed and wind-driven generator output power in the wind-power electricity generation process, y coordinate among Fig. 1 is the ratio of wind speed and a certain standard wind speed, for example standard wind speed is 3 meter per seconds, wind speed is 1.5 meter per seconds now, the multiplying power that this ratio marks in this figure is exactly 0.5, using multiplying power among Fig. 1 is in order can to compare, and another curve among Fig. 1 is the curve of double curvature that output power changes, and it indicates with multiplying power after calculating power according to above-mentioned formula.As can be seen from Figure 1, because change of wind velocity, the electric power variation of wind-driven generator output is more much bigger than change of wind velocity, because it is directly proportional with the cube of wind speed, this is the serious unsettled reason of wind-powered electricity generation place just.Because the voltage of the electric power that wind-driven generator sends and the frequency of Ac have requirement, therefore the variation of electric power is exactly the variation of electric current in fact, obviously, so the electric current of amplitude changes the instability that must cause electrical network, Here it is, and why electrical network is for very opposition of wind-powered electricity generation online, for no other reason than that policy also causes power supply department to spend very big cost for the quality of stable electrical simultaneously to the renewable energy sources wind-powered electricity generation that tilts just to have to receive, Here it is bottleneck place that wind-powered electricity generation surfs the Net.This shows that people also are difficult to fully, effectively utilize wind-powered electricity generation at present, cause the bigger waste of wind resource, resource is difficult to reasonable utilization.
At present also there are some to be used for the method for store electrical energy relatively preferably, as open day was on December 14th, 2005, publication number is in the Chinese patent of CN1707095, a kind of method of utilizing high pressure air energy accumulation to generate electricity is disclosed, this technological scheme is to make several large-scale gas holder, StrongmenGroup powered on that night when surplus, gas storage in the gas holder, the peak appears in the electricity consumption when daytime, open the gas holder pipeline valve, utilize the high-pressure air in the gas holder to promote gas-turbine and drive generator to generate electricity, after electric energy stores with compressed-air actuated form, it is very unpractical also driving dynamic power machine with air, in this invention toward gas holder in the efficient during gas storage lower, promote gas-turbine by high-pressure air and drive generator and generate electricity, owing to the density of high-pressure air is less, generating efficiency is very low, and energy conversion ratio is low.In like manner, open day is on 05 17th, 2006, publication number is in the Chinese patent of CN1773110, disclose a kind of compression air energy-storing apparatus and application thereof, this technological scheme is uncontrollable energy that nature exists to be transformed into controlled compressed-air actuated form store, the energy that produces when utilizing the pressurized air of laying in to discharge, the energy as the driving arrangement operation, this method also is to drive generator by high-pressure air to generate electricity, and generating efficiency is low, and energy conversion ratio is low.
In sum, also there is not a kind of low equipment investment at present, simple to operate, the method of the energy storage power generation that energy conversion ratio is high, thereby cause wind-powered electricity generation to be difficult to effectively be utilized, comprise that the energy of electrical network peak valley electricity is difficult to be fully utilized, increased the cost of electric power.
Summary of the invention
The objective of the invention is to overcome above shortcomings in the prior art, and a kind of low equipment investment is provided, simple to operate, energy conversion ratio height can effectively utilize the sub-terrain mines hole that utilizes of electrical network peak valley electricity and wind-powered electricity generation to carry out the method for energy storage power generation.
The present invention addresses the above problem the technological scheme that is adopted: this utilizes the sub-terrain mines hole to carry out the method for energy storage power generation, its characteristics are: the used equipment of this method comprises uncovered cavity, can bear the seal chamber of 1-30 MPa pressure, be installed in pressure and condensate tank of dehumidifier in the seal chamber, the reversible pump water wheels machine room that has Reversible Pump-Turbine, the upper and lower conduit road that the upper end is connected with Reversible Pump-Turbine, with the controlling device that the upper and lower conduit road communicates, be installed in the filter screen at two ends, upper and lower conduit road; Described seal chamber is embedded in underground, and the lower end in described upper and lower conduit road is positioned at the bottom of seal chamber, and described reversible pump water wheels machine room is connected with external electrical network by cable;
This method comprises accumulation of energy step and generation steps successively, in the described accumulation of energy step, in uncovered cavity, be marked with water, in seal chamber, fill water and air, electric energy when grid power is rich in stabilizing the peak valley electric process by external electrical network earlier drives the Reversible Pump-Turbine operation, water in the uncovered cavity is injected in the seal chamber by the upper and lower conduit road, after Reversible Pump-Turbine is out of service, the air pressure in the seal chamber is adjusted to design setting value between the 1-30 MPa by controlling device;
In the described generation steps, the water that is arranged in seal chamber is under the action of air pressure of seal chamber, water in the seal chamber is discharged in the uncovered cavity by the upper and lower conduit road, driving Reversible Pump-Turbine when the water of discharging from seal chamber passes through the upper and lower conduit road generates electricity, the electric energy that Reversible Pump-Turbine produced is incorporated in the external electrical network of electric power scarcity, when the liquid level of water in the seal chamber was higher than upper and lower conduit road lower end 0.5-3m, the water in the seal chamber stopped to be discharged in the uncovered cavity.
External electrical network involved in the present invention comprises wind power system, and the high-pressure water pump that is connected with wind power system is installed in the wind energy energy storage pipe on the high-pressure water pump, is installed in import one-way valve and flow pressure testing apparatus in the wind energy energy storage pipe; The outlet of described wind energy energy storage pipe is connected with the upper and lower conduit road; In the described accumulation of energy step, drive high-pressure water pump by the electric energy in the wind power system and move, the water in the uncovered cavity injects seal chamber by wind energy energy storage pipe and upper and lower conduit road successively.
The lower end in upper and lower conduit of the present invention road is positioned at the top of seal chamber lowest part, and the distance of the lower end in this upper and lower conduit road and seal chamber bottom surface is between 1-5m.
Seal chamber of the present invention is the cavern of sealing, and this cavern is underground mine and/or sub-terrain mines hole and/or underground natural cave and/or underground artificial cave and/or underground crack.
The used equipment of the present invention also comprises the outlet one-way valve, and this outlet one-way valve is installed in the outlet port of wind energy energy storage pipe.
Controlling device of the present invention comprises the press water level sensor that is arranged in the seal chamber and the pressure and the water-level control apparatus that can change in the seal chamber.
Seal chamber of the present invention is that natural or discarded underground mine and/or sub-terrain mines hole are being carried out the formation later on of all leakage holes of shutoff.
The present invention compared with prior art, have the following advantages and effect: when external electrical network is being stabilized in the peak valley electric process grid power rich the time, when evening, people slept rest, power consumption has just descended, even electrical network reduces generating capacity as possible, it is unnecessary that electric power in the electrical network also has, use this part unnecessary electric power to drive the operation of reversible pump water wheels machine room, by Reversible Pump-Turbine the water in the uncovered cavity is injected seal chamber, realize the purpose of stored energy by contract air in the seal chamber of hydraulic pressure, thereby realize electric power unnecessary in the external electrical network being stored the accumulation of energy step among the present invention that Here it is.When the electric power in the external electrical network is deficient, people's power consumption is big as daytime, even electrical network puts into high gear to generate electricity, still supply falls short of demand for electric power, discharge in accumulation of energy step stored energy by generation steps of the present invention this moment, this part energy that discharges is converted into electric energy by Reversible Pump-Turbine, and this part electric energy is incorporated in the external electrical network at last, is used for the electric power of supply external electrical network.By the accumulation of energy step among the present invention and the generation steps electric power resource in can balanced external electrical network, make that the electric power in the external electrical network is utilized more fully, improved rate of energy, bring bigger facility for people's work, life.
Seal chamber of the present invention is embedded in underground, the sealing cavity mainly be can bear elevated pressures be positioned at the face of land following mine, sub-terrain mines hole, underground natural cave, underground artificial cave and underground crack, thereby improved the utilization ratio of resource, greatly reduce the manufacture cost of equipment, can not produce and destroy environment.
The present invention is a kind of following discarded hole, mine ore deposit, the face of land and method that the seal chamber that can bear elevated pressures stores or the release pressurized gas is saved or released energy of natural or artificial formation mainly utilized, driving other high density working medium by reversible pump water wheels machine room during stored energy under electrical network or other electric power effect enters seal chamber and comes pressurized gas, also directly pressurized gas improves the gas pressure of seal chamber, be under the pressure effect of pressurized gas, to force other high density working medium to drive dynamo-electric power generating equipment to generate electricity when releasing energy through pipeline, simultaneously other high density working medium is drawn seal chamber and the gas pressure in the seal chamber is discharged, in order to make accumulation of energy step and the generation steps can prolonged and repeated carrying out, inside and outside seal chamber, can dispose the pressure in necessary supervision and the control seal chamber, the supplementary equipment of water level and composition.
The history of human mining has had more than 1000 year, and first people have made countless hole, discarded ore deposit below the face of land, and nowadays they filling with water mostly, these water are not only bitter but also salty, what have has strong corrosivity, that have even poisonous, and it has and is named as old misery.The hole, ore deposit that these are discarded, the hole that has is filled up by artificial or natural God, and what have is just being covered by vegetation, often also causes human injury.In the last hundred years, the mineral species that comes out along with human development and the surge of quantity, also along with people's mining technique, the raising of mechanization level, larger under the face of land, increase sharply from the farther hole, ore deposit of distance, the face of land.The present invention can rationally utilize these holes, ore deposit, turns waste into wealth, and improves resource utilization greatly.
The cavity that can bear following discarded hole, mine ore deposit, the face of land of elevated pressures and natural or artificial formation can both be used as the seal chamber among the present invention.People are just more and more using gold, silver, copper, iron, tin, coal, oil, rare earth elements, and these mineral substance are not pure to be present in naturally usually, and are present under the face of land mostly and massif inside.People open a mine on a large scale in order to obtain these materials, thereby have stayed countless hole, mine ore deposit underground, in addition, because the differentiation of the earth's crust, erosion have also formed various natural caves.These caves, hole, mine ore deposit have above very thick stratum is arranged, and hole, mine ore deposit also can form the underground cavity that can bear high pressure of sealing fully through artificial treatment, here so-called artificial treatment, be meant the processing of carrying out later on through prospective design for underground cavity such as discarded underground mine, hole, ore deposit, natural cave, artificial cave, underground crack, the hole that stays when for example shutoff is surveyed, the shutoff in tunnel, burying underground of pipeline, survey the arrangement with sensor, the maintenance man imports and exports being provided with of door opening etc.All underground cavitys that can be sealed and can bear pressure fully all can use this method to realize the energy storage power generation function.
The less investment of device therefor of the present invention can not produce environment and destroy, and the whole operation process is simple, can effectively improve the utilization ratio of electric power, alleviates the irrational phenomenon of electric power distribution in the electrical network greatly, is convenient to people's better work and life.
Description of drawings
Fig. 1 concerns schematic representation between wind speed and the wind-driven generator output power in the wind-power electricity generation process of prior art;
Fig. 2 is the structural representation of the embodiment of the invention 1;
Fig. 3 is the flow chart of the embodiment of the invention 1;
Fig. 4 is the structural representation of the embodiment of the invention 2;
Fig. 5 is the flow chart of the embodiment of the invention 2;
Necessary program block diagram when Fig. 6 is the embodiment of the invention 2 enforcements.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and by embodiment, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment 1:
Referring to Fig. 2 and Fig. 3, the method of utilizing the sub-terrain mines hole to carry out energy storage power generation in the present embodiment comprises accumulation of energy step and generation steps successively, the used equipment of this method comprises uncovered cavity 1, can bear the seal chamber 2 of 3 MPa pressure, be installed in pressure and condensate tank of dehumidifier in the seal chamber 2, the reversible pump water wheels machine room 3 that has Reversible Pump-Turbine, be installed in the upper and lower conduit road 4 on the Reversible Pump-Turbine, be installed in the filter screen 5 of 4 lower ends, upper and lower conduit road, by cable and controlling device, condensate tank of dehumidifier, total monitoring chamber that reversible pump water wheels machine room 3 is connected.
What the present invention at first carried out is the accumulation of energy step, be marked with water for 1 li at uncovered cavity, fill the sky G﹠W in seal chamber 2, the air here can be atmospheric pressure or be higher than atmospheric pressure when accumulation of energy first, and it should be the pressed gas of a certain setting when normal operation.Be added with one deck gas barrier layer on the water surface of seal chamber 2, adopt liquid paraffin as the gas barrier layer in the present embodiment, liquid paraffin can cut off contacting between air and the water, thereby reduces the solution velocity of air in water greatly.The present invention also can adopt other materials to be used as the gas barrier layer, such as wet goods, certainly, the present invention also can not add the gas barrier layer on the water surface of seal chamber 2, because the solubility of air in water was just less originally, even when little air is dissolved in the water and when causing air in the seal chamber 2 to reduce, can comes the air in the seal chamber 2 are carried out supply by controlling device.
External electrical network that is connected with reversible pump water wheels machine room 3 by cable such as waterpower electrical network, nuclear power system, wind-force electrical network etc., in case when having arrived non-peak times of power consumption, even external electrical network reduces the also have more than is needed electric power that sends of generating capacity as possible, thereby causes the electric power in the whole external electrical network unnecessary.Present embodiment in the accumulation of energy step earlier by external electrical network in unnecessary electric energy drive Reversible Pump-Turbine and move, because upper and lower conduit road 4 is installed on the Reversible Pump-Turbine, after the Reversible Pump-Turbine operation, the water that uncovered cavity is 1 li is injected into upper and lower conduit road 4 in the seal chamber 2 by the pump operating state of Reversible Pump-Turbine, along with the water in the uncovered cavity 1 is constantly annotated in the seal chamber 2, water level in the seal chamber 2 constantly raises, when the volume of water in the seal chamber 2 reaches 80 ten thousand steres, Reversible Pump-Turbine is out of service, the volume that be arranged in the air of seal chamber 2 this moment is 70 ten thousand steres, by controlling device the air pressure in the seal chamber 2 is adjusted to 2.6 MPas then, make that the pressure of air is higher than extraneous barometric pressure far away in the seal chamber 2, promptly in seal chamber 2, form a high pressure, so far, accumulation of energy step finishes.
After the accumulation of energy step in the present embodiment, the electric energy when grid power is rich in stabilizing the peak valley electric process with external electrical network is stored in the seal chamber 2 by other forms, can effectively prevent the waste of the energy, has improved the utilization ratio of resource.When running into power consumption big the time, the electric power in the external electrical network occurs deficient, even external electrical network puts into high gear to generate electricity, still supply falls short of demand for electric power, and can start the generation steps in the present embodiment this moment.In the generation steps of present embodiment, because the air in the seal chamber 2 is a high-pressure air, the water that is arranged in seal chamber 2 is under the effect of the air of seal chamber 2, water in the seal chamber 2 is discharged in the uncovered cavity 1 by Reversible Pump-Turbine and upper and lower conduit road 4, driving Reversible Pump-Turbine when the water of discharge is through upper and lower conduit road 4 from seal chamber 2 rotates, thereby realize the function that Reversible Pump-Turbine is generated electricity, and the electric energy that Reversible Pump-Turbine produced is incorporated in the external electrical network of electric power scarcity, thereby can effectively alleviate the pressure of external electrical network, along with the water in the seal chamber 2 is constantly arranged to uncovered cavity 1, the liquid level of water constantly descends in the seal chamber 2, the volume of air constantly increases in the seal chamber 2, the pressure of this air constantly descends, air in the seal chamber 2 allows to enter upper and lower conduit road 4 by vortical anything but therebetween, when the liquid level of water in the seal chamber 2 is higher than 4 lower ends, upper and lower conduit road and is a certain setting value, water in the seal chamber 2 stops to be discharged in the uncovered cavity 1, so far, the generation steps in the present embodiment finishes.When the present invention can the liquid level of water be higher than upper and lower conduit road 4 lower end 0.5-3m in seal chamber 2, the water in the seal chamber 2 stopped to be discharged in the uncovered cavity 1, for example when utilizing energy stored to greatest extent.The liquid level of water is higher than 4 lower ends, upper and lower conduit road and is meant that 4 lower ends, upper and lower conduit road are in the situation in the water all the time in the seal chamber 2 of the present invention, and the liquid level of water is the liquid level that is positioned at the water of upper and lower conduit road 4 peripheries in the sealing cavity 2.
Underground discarded hole, mine ore deposit is normally formed after original spontaneous growth mineral are here exploited; so water; gas change pressure or turnover in seal chamber 2 are flowed and all can be caused relict mineral or dissolving or the doping of hole wall material in water; in fact initial water is very muddy in the hole, ore deposit; and have serious acid or alkaline; strong corrosivity is arranged; for pipeline destruction is arranged; therefore also need handle as the water of high density working medium; this mainly is to handle by the Chemical Physics means; for example can regulate with the neutralization reaction method adding alkali or the acid of chemistry for pH value; usually the Ph value that should adjust pH value is greater than 7; be alkalescent, but because alkalescent protective money metal conduit is not corroded.In addition, dust granules is arranged in the water unavoidably, what have is state of suspension and the muddiness that causes water to become, this can handle with physics or chemical means, and for example the water outlet in upper and lower conduit road 4 is provided with filter screen 5, also can add agglutinating matter in water, as alum, make suspended matter be agglomerated to the bottom and go, adopt in water, to add agglutinating matter and water is handled be not to put things right once and for all, but need regularly to detect water and often adjust.Though the water that sub-terrain mines hole energy storage power generation technology is used is cycling use of water, and pass through to handle to seem it should is peace and quiet thorough, but still can not eat, its water source should separate fully with domestic water.
On the gas-water interface in underground seal chamber 2, also the same with all rivers of nature, river, lake, the sea gas that exists dissolves in phenomenon in the water.Physics is told us, and the various compositions in the gas all can be dissolved in water, but solubility is very low, and along with the increase of pressure, solubility can improve, but influence is very little, for example can dissolve 0.024 liter nitrogen at most in 1 liter the water 0 degree centigrade the time.Be dissolved with saturated gas owing to be present in the water of occurring in nature, so under the normal temperature, the gas componant in the gas is general and no longer be dissolved in water.The increase that Gas Solubility is held along with pressure increases, along with the rising of temperature reduces, under high-pressure state, gas in the seal chamber 2 is to increase solubility, but quantity is very little, and air soluble in water also can cause the gas gross in the seal chamber 2 to reduce to some extent along with water flows out seal chamber by water turbine in generation steps.And after generation steps finished, the pressure of the water in the seal chamber 2 had reduced, the gas that is arranged in the water of seal chamber 2 water body of also can overflowing.On the whole, along with carrying out repeatedly of accumulation of energy step and generation steps, the gas in the seal chamber 2 can reduce gradually, therefore, sub-terrain mines hole energy storage power generation method also must in time be replenished the gas in the seal chamber 2, for example replenishes nitrogen etc., stablizes constant with the running parameter that guarantees seal chamber.
The cavern energy storage power generation needs many determining instruments in order to guarantee normal operation in the seal chamber 2, for example pressure gauge, water stage measurement device etc., and the installation of these determining instruments is common practise for a person skilled in the art.In order to reduce the gas solution velocity, can consider that also the water surface in the seal chamber 2 injects the material of some proportions between water and gas, for example mineral oil, liquid paraffin etc., because oil always floats on the surface, so in fact this constituted the separation layer of isolated gas of one deck and water.Certainly because this method include replenish pressurized gas means interior, in order to guarantee the quality of water, also separation layer that can be such.
In accumulation of energy step of the present invention, the electrical network consume electric power is got to the water in ground or the underground uncovered cavity 1 in the underground high-voltage seal chamber 2 through upper and lower conduit road 4 by Reversible Pump-Turbine and is gone, the water level of underground high-voltage seal chamber 2 raises and has pushed air volume in the underground high-voltage seal chamber 2, the pressure of air has been improved, the pressure of underground high-voltage seal chamber 2, water level, water quality is not stop in monitored and the monitoring, the various sensors that are embedded in the underground high-voltage seal chamber 2 have been delivered to total monitoring chamber to the parameter that measures, total monitoring chamber is analyzed the data that record, whether to replenish air or adjust water quality with decision to underground high-voltage seal chamber 2, water level in underground high-voltage seal chamber 2 and pressure reach the index of appointment, just reach with till the energy storage index, thermal energy storage process finishes.
In generation steps of the present invention, open Reversible Pump-Turbine to ground or the valve of underground uncovered cavity 1, water body in the underground high-voltage seal chamber 2 in the compressed-air actuated pressure compression underground high-voltage seal chamber 2 is got back in ground or the underground uncovered cavity 1 by upper and lower conduit road 4 and Reversible Pump-Turbine, meanwhile, water turbine drives generator for electricity generation, and the electric power that is produced is to mains supply.
We have a look sub-terrain mines hole energy storage power generation technology below in conjunction with data, for example, there is the volume of 150 ten thousand steres in one sub-terrain mines hole, the space that this coal that is equivalent to be exploited 3,000,000 tons stays, gas volume was 70 ten thousand steres when we set its energy storage state now, at this moment air pressure is 2.6 MPas, so, according to gas law, when pressure is reduced to 1.6 MPas, gas volume will be extended to 113.75 ten thousand steres, 113.75-70=43.75 ten thousand stere, this 43.75 ten thousand stere will flow through the reversible pump water turbine greater than 1.7 MPas (reduce to 1.6 MPas from 2.6 MPas, mean value is 2.1 MPas) compressing water body with middle pressure, promptly be equivalent on average have in 1 hour the flow of 437500/3600=121.52 cube of meter per second to flow through the reversible pump water turbine.And model is the axial flow hydraulic turbine of SF1250-12, is 17.9 meters i.e. 1.79 MPas at head, and when flow was 9.096 cubes of meter per seconds, generated output was 1374 kilowatts.Therefore the flow that can know 121.52 cubes of meter per seconds equals 13.36 water turbine divided by 9.096 and works at the same time, total output is 18.36 megawatts, because generating dutation is 1 hour here, therefore gross generation be 18.36 megawatts-time, promptly 1.835 ten thousand degree are electric, and actual conditions also need to add efficiency factor certainly.To this moment, also have the water of 36.25 ten thousand steres in the mine, water surface pressure is 1.6 MPas.
It is to be noted that gas volume is 70 ten thousand steres, air pressure is that the energy storage state of 2.6 MPas far is not the ultimate state in this hole, ore deposit, when 1.6 MPas, also has the limit situation that the water of 36.25 ten thousand steres neither be final, in other words the potentiality in this hole, ore deposit also can improve greatly, as long as the running parameter scope of water turbine can be wideer.Also it is to be noted, the sub-terrain mines hole is many at the tens of rice of below ground, even hundreds of rice, 100 meters static pressures of the depth of water in theory with loss 1 MPa, this is to deduct from the compressed-air actuated pressure that stores, but energy does not go out in theory, and this part pressure that deducts also increases during energy storage just.Too dark hole, ore deposit is not suitable for that water is mentioned ground surface and discharges, reason is that long pipeline has too much losing along stroke pressure, at this moment, if underground have the hole, ore deposit in addition, water can be mentioned the lower hole, ore deposit of these logical atmosphere or air pressure stores, Here it is so-called groundwater reservoir, and the power station also will be located at underground this moment.
High density working medium of the present invention enters seal chamber and comes pressurized gas to be meant two kinds of working medium are arranged in the seal chamber 2, one is that the solubility in other high density working medium of any proportioning is very low, the gas that is gaseous state under the working state, for example contain nitrogen, carbon dioxide, the gas of various ratios such as oxygen, it two is other high density working medium, be the density that is in a liquid state under the working state liquid far above gas, water for example, the aqueous solution, suspension, no matter be gas or liquid, all must be to pipeline, electromechanical equipment and auxiliary device can not produce the effect of corrosion failure, and therefore needs in service are monitored the chemical composition of gas and liquid at any time and regulated by chemistry or physical means.
Dynamo-electric suction booster of the present invention, dynamo-electric power generating equipment can be electric water pump, hydraulic generator unit, normally be widely used in the Reversible Pump-Turbine and the reversible motor generator at pumped-storage power generation station now, Reversible Pump-Turbine combines with the reversible motor generator, when energy storage, play the motor make-up water pump, when generating, play water turbine and add generator.
Need to prove, among the present invention said uncovered cavity 1 and nonessential be the cavity that is uncovered structure on the stricti jurise, those internal pressures also belong in the category of the said uncovered cavity 1 of the present invention well below the low pressure seal cavity of seal chamber 2 internal pressures.
Embodiment 2:
Referring to Fig. 4 to Fig. 6, the method of utilizing the sub-terrain mines hole to carry out energy storage power generation in the present embodiment comprises accumulation of energy step and generation steps successively, the used equipment of this method comprises uncovered cavity 1, can bear the seal chamber 2 of 1.2 MPa pressure, be installed in pressure and condensate tank of dehumidifier in the seal chamber 2, the reversible pump water wheels machine room 3 that has Reversible Pump-Turbine, be installed in the upper and lower conduit road 4 on the Reversible Pump-Turbine, be installed in the filter screen 5 of 4 lower ends, upper and lower conduit road, wind power system 8, the high-pressure water pump 7 that is connected with wind power system 8, be installed in the wind energy energy storage pipe 6 on the high-pressure water pump 7, be installed in import one-way valve and flow pressure testing apparatus in the wind energy energy storage pipe 6, be installed in the outlet one-way valve in wind energy energy storage pipe 6 outlet ports, by cable and controlling device, condensate tank of dehumidifier, reversible pump water wheels machine room 3, the flow pressure testing apparatus, high-pressure water pump 7, total monitoring chamber that wind power system 8 is connected.Wherein the outlet of wind energy energy storage pipe 6 is connected with upper and lower conduit road 4, and outside water can enter in the upper and lower conduit road 4 by wind energy energy storage pipe 6, enters in the seal chamber 2 by upper and lower conduit road 4 at last.Controlling device, condensate tank of dehumidifier, Reversible Pump-Turbine, reversible pump water wheels machine room 3, upper and lower conduit road 4, filter screen 5, wind energy energy storage pipe 6, flow pressure testing apparatus, high-pressure water pump 7, import one-way valve, outlet one-way valve and wind power system 8 used among the present invention are all same as the prior art or close, all no longer describe in detail herein.
What the present invention at first carried out is the accumulation of energy step, be marked with water for 1 li at uncovered cavity, in seal chamber 2, fill the sky G﹠W, driving high-pressure water pump 7 by the electric energy in the wind power system 8 moves, the water that uncovered cavity is 1 li injects seal chamber 2 by wind energy energy storage pipe 6 and upper and lower conduit road 4 successively, when the volume of water in the seal chamber 2 reaches 2444 cubic metres, Reversible Pump-Turbine is out of service, by controlling device the air pressure in the seal chamber 2 is adjusted to 1.16 MPas then, make that the pressure of air is higher than extraneous barometric pressure far away in the seal chamber 2, promptly form a high pressure in seal chamber 2, so far, the accumulation of energy step finishes.
After the accumulation of energy step in the present embodiment, the electric energy in the wind power system 8 is stored in the seal chamber 2 by other forms, can make full use of the electric energy in the wind power system 8, improved the utilization ratio of resource.When running into power consumption big the time, can start the generation steps in the present embodiment.In the generation steps of present embodiment, because the air in the seal chamber 2 is a high-pressure air, the water that is arranged in seal chamber 2 is under the effect of the air of seal chamber 2, water in the seal chamber 2 is discharged in the uncovered cavity 1 by upper and lower conduit road 4, driving Reversible Pump-Turbine when the water of discharge is through upper and lower conduit road 4 from seal chamber 2 rotates, thereby realize the function that Reversible Pump-Turbine is generated electricity, and the electric energy that Reversible Pump-Turbine produced is incorporated in the external electrical network of electric power scarcity, thereby can effectively alleviate the pressure of external electrical network, along with the water in the seal chamber 2 is constantly arranged to uncovered cavity 1, the liquid level of water constantly descends in the seal chamber 2, the volume of air constantly increases in the seal chamber 2, the pressure of this air constantly descends, when the liquid level of water in the seal chamber 2 is higher than 4 lower ends, upper and lower conduit road and is a certain setting value, water in the seal chamber 2 stops to be discharged in the uncovered cavity 1, and so far, the generation steps in the present embodiment finishes.When the present invention can the liquid level of water be higher than upper and lower conduit road 4 lower end 0.5-3m in seal chamber 2, water in the seal chamber 2 stops to be discharged in the uncovered cavity 1, the liquid level of water is higher than 4 lower ends, upper and lower conduit road and is meant that 4 lower ends, upper and lower conduit road are in the situation in the water all the time in the seal chamber 2 of the present invention, and the liquid level of water is the liquid level that is positioned at the water of upper and lower conduit road 4 peripheries in the sealing cavity 2.Present embodiment is a sub-terrain mines hole energy storage electric generating station that is applicable to that 20 megawatt wind energy turbine set require.
Sub-terrain mines hole energy storage power generation method and pumped-storage power generation method compare, and have bigger advantage, specifically referring to table 1, build the pumped-storage power generation station and need build artificial reservior on the mountain top, and therefore investment is big, and is bigger to the ground environmental disruption; And the energy storage power generation method utilization of sub-terrain mines hole leaves discarded hole, ore deposit in history, invests for a short time, does not almost destroy environment.
Table 1 sub-terrain mines hole energy storage power generation method and pumped-storage power generation method comparison sheet
| Title | Energy storage method | The energy storage energy | Total efficiency | The investment amount | Generation mode | Transducing devices | Take geography | Function | Other effect |
| The pumped-storage power generation technology | The potential energy of the potential energy difference that water body has | Grid power | Water body potential energy decision efficient can not improve | High | The generating of driving water turbine | Reversible pump-water turbine | The bed rearrangement massif that need satisfy the requirements | Stabilize the electrical network peak valley | Newly ward off and browse the scenic spot |
| Sub-terrain mines hole energy storage power generation technology | Pressurized air forms the pressure energy of air spring | Grid power and wind-powered electricity generation electric power | The efficient height because aqueduct is more short out | Low | The same | The same | Hole, underground discarded ore deposit, cave | The same and overcome the wind-powered electricity generation bottleneck | The same |
Electrical network absorbs the energy of wind-powered electricity generation when overcoming the peak valley electricity, the water that allows wind-powered electricity generation oppress together in the reservoir enters seal chamber 2, that is to say that the electric energy that wind-powered electricity generation generates no longer directly is connected to the grid, but by being connected to the grid after the storage of sub-terrain mines hole energy storage power generation method, the buffering, the bottleneck of wind-powered electricity generation had just no longer existed in the past again.For the ease of metering, be provided with the flow pressure testing apparatus in the electric water pump outlet that is connected with wind energy conversion system, so that calculate the energy of wind energy conversion system input accumulator space, and water also should add one-way valve in the past entering towards the accumulator space main pipe, and the terminal of wind energy energy storage pipe 6 also will add one-way valve, and purpose is to damage the pressure loss that causes accumulator space for fear of optional equipment.
Not all underground mine can both be used sub-terrain mines hole energy storage power generation method and come energy storing and electricity generating, the hole, ore deposit of only can be sealed and can bearing the pressure that needs just can be used for sub-terrain mines hole energy storage power generation method energy storing and electricity generating, in general, the voltage endurance capability in sub-terrain mines hole is at least in 1 MPa-30 MPa.For example suitable with pumped-storage power generation station, waste level ground, sky sub-terrain mines hole energy storage electric generating station calculates by being positioned at underground 200 meters maximum pressure 10 MPas, for a wind power plant, the marshalling of tens wind energy conversion systems, perhaps comprise the solar power station, do not need to build the sub-terrain mines hole energy storage electric generating station that resembles scale day pumped-storage power generation station, waste level ground, thereby the sub-terrain mines hole of using can be much smaller.
Because according to state's laws, hole, underground mine ore deposit all is to belong to national assets, therefore utilize hole, underground mine ore deposit must obtain the approval of government.As government, do not destroy physical environment because build sub-terrain mines hole energy storage electric generating station, the opposite landscape sightseeing spot that also might build a ground reservoir, the water level of ground reservoir raises daytime, and descend to night, can also attach and build artificial waterfall or fountain, therefore be the thing of killing two birds with one stone, can improve environment, alleviate the peak valley electric load, solve the online contradiction of wind energy turbine set.
Though the present invention with embodiment openly as above; but it is not in order to limit protection scope of the present invention; any technician who is familiar with this technology, change and the retouching done in not breaking away from design of the present invention and scope all should belong to protection scope of the present invention.
Claims (7)
1. method of utilizing the sub-terrain mines hole to carry out energy storage power generation, it is characterized in that: the used equipment of this method comprises uncovered cavity, can bear the seal chamber of 1-30 MPa pressure, be installed in pressure and condensate tank of dehumidifier in the seal chamber, the reversible pump water wheels machine room that has Reversible Pump-Turbine, the upper and lower conduit road that the upper end is connected with Reversible Pump-Turbine with the controlling device that the upper and lower conduit road communicates, is installed in the filter screen at two ends, upper and lower conduit road; Described seal chamber is embedded in underground, and the lower end in described upper and lower conduit road is positioned at the bottom of seal chamber, and described reversible pump water wheels machine room is connected with external electrical network by cable;
This method comprises accumulation of energy step and generation steps successively, in the described accumulation of energy step, in uncovered cavity, be marked with water, in seal chamber, fill water and air, electric energy when grid power is rich in stabilizing the peak valley electric process by external electrical network earlier drives the Reversible Pump-Turbine operation, water in the uncovered cavity is injected in the seal chamber by the upper and lower conduit road, after Reversible Pump-Turbine is out of service, the air pressure in the seal chamber is adjusted to design setting value between the 1-30 MPa by controlling device;
In the described generation steps, the water that is arranged in seal chamber is under the action of air pressure of seal chamber, water in the seal chamber is discharged in the uncovered cavity by the upper and lower conduit road, driving Reversible Pump-Turbine when the water of discharging from seal chamber passes through the upper and lower conduit road generates electricity, the electric energy that Reversible Pump-Turbine produced is incorporated in the external electrical network of electric power scarcity, when the liquid level of water in the seal chamber was higher than upper and lower conduit road lower end 0.5-3m, the water in the seal chamber stopped to be discharged in the uncovered cavity.
2. the method for utilizing the sub-terrain mines hole to carry out energy storage power generation according to claim 1, it is characterized in that: the related external electrical network of this method comprises wind power system, the high-pressure water pump that is connected with wind power system, be installed in the wind energy energy storage pipe on the high-pressure water pump, be installed in import one-way valve and flow pressure testing apparatus in the wind energy energy storage pipe; The outlet of described wind energy energy storage pipe is connected with the upper and lower conduit road; In the described accumulation of energy step, drive high-pressure water pump by the electric energy in the wind power system and move, the water in the uncovered cavity injects seal chamber by wind energy energy storage pipe and upper and lower conduit road successively.
3. the method for utilizing the sub-terrain mines hole to carry out energy storage power generation according to claim 1 and 2, it is characterized in that: the lower end in described upper and lower conduit road is positioned at the top of seal chamber lowest part, and the distance of the lower end in this upper and lower conduit road and seal chamber bottom surface is between 1-5m.
4. the method for utilizing the sub-terrain mines hole to carry out energy storage power generation according to claim 1 and 2, it is characterized in that: described seal chamber is the cavern of sealing, and this cavern is underground mine and/or sub-terrain mines hole and/or underground natural cave and/or underground artificial cave and/or underground crack.
5. the method for utilizing the sub-terrain mines hole to carry out energy storage power generation according to claim 2 is characterized in that: the used equipment of this method also comprises the outlet one-way valve, and this outlet one-way valve is installed in the outlet port of wind energy energy storage pipe.
6. the method for utilizing the sub-terrain mines hole to carry out energy storage power generation according to claim 1 and 2 is characterized in that: described controlling device comprises the press water level sensor that is arranged in the seal chamber and the pressure and the water-level control apparatus that can change in the seal chamber.
7. the method for utilizing the sub-terrain mines hole to carry out energy storage power generation according to claim 4 is characterized in that: described seal chamber is that natural or discarded underground mine and/or sub-terrain mines hole are being carried out the formation later on of all leakage holes of shutoff.
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| CN105909311A (en) * | 2016-05-27 | 2016-08-31 | 安徽省皖北煤电集团有限责任公司含山恒泰非金属材料分公司 | Application of hard gypsum mine gob in energy storage and article storage |
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| CN105927275B (en) * | 2016-05-27 | 2017-12-08 | 安徽省皖北煤电集团有限责任公司含山恒泰非金属材料分公司 | A kind of method based on Anhydrite Ore goaf storage metal embryo material |
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Application publication date: 20111130 |