CN115306624B - Combined energy storage system based on closing coal mine roadway space - Google Patents
Combined energy storage system based on closing coal mine roadway space Download PDFInfo
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- CN115306624B CN115306624B CN202210942591.9A CN202210942591A CN115306624B CN 115306624 B CN115306624 B CN 115306624B CN 202210942591 A CN202210942591 A CN 202210942591A CN 115306624 B CN115306624 B CN 115306624B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 65
- 239000003245 coal Substances 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 156
- 230000005484 gravity Effects 0.000 claims abstract description 67
- 238000003860 storage Methods 0.000 claims abstract description 23
- 238000005265 energy consumption Methods 0.000 claims abstract description 4
- 238000005065 mining Methods 0.000 claims description 37
- 230000001681 protective effect Effects 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 17
- 230000000903 blocking effect Effects 0.000 claims description 12
- 238000005381 potential energy Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 238000010248 power generation Methods 0.000 claims description 8
- 238000007790 scraping Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000003344 environmental pollutant Substances 0.000 claims description 6
- 231100000719 pollutant Toxicity 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 3
- 244000062793 Sorghum vulgare Species 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000019713 millet Nutrition 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/06—Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/08—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for removing foreign matter, e.g. mud
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G3/00—Other motors, e.g. gravity or inertia motors
- F03G3/087—Gravity or weight motors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- 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
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention relates to the technical field of closed coal mine reconstruction and reuse, in particular to a combined energy storage system based on a closed coal mine roadway space. By using the multi-well combined energy storage system taking pumped storage as a main and gravity energy storage as an auxiliary, the underground roadway space resources, the overground industrial square land resources, the vertical shaft space resources and the mine water resources of the closed mine are fully utilized in the same well Tian Ouyu, the installed capacity of the closed mine energy storage system can be effectively improved, and the capacity of regulating new energy consumption and peak clipping and valley filling of a power grid is improved.
Description
Technical Field
The invention relates to the technical field of closed coal mine reconstruction, in particular to a combined energy storage system based on closed coal mine roadway space.
Background
In recent years, a large number of resources are exhausted and the mine with energy production is closed or is about to be closed, space resources and mine water resources in the mine are fully utilized, development and utilization of the closed mine resources are brought into regional economic and social development, secondary return of the resources and the assets is realized, resource waste can be reduced, development and utilization efficiency of energy resources in the whole life cycle of the mine can be improved, and meanwhile, the continuous development of renewable energy influences the energy structure composition and the electric power supply market of China.
Because the electric network does not store energy, along with the proposal and popularization of the double-carbon target, the energy conveying and distributing system must solve the uncertainty of renewable energy, otherwise, the surplus renewable energy power which cannot meet the electric network requirement must be abandoned, the pumped storage and the gravity energy storage are used as the construction preferred schemes for closing the mine energy storage, the pumped storage scheme is commonly reported, such as an underground gasification abandoned mine pumped storage power generation structure proposed in patent application number 202021795735.5, and the gravity energy storage scheme is a gravity energy storage system based on a mine vertical shaft, lifting and transportation system proposed in patent application number 201920142843.3.
However, in the existing technical scheme, because the underground space resources of a single mine are limited, the effective installed power which can be achieved by a pumped storage power station in the traditional abandoned mine pumped storage scheme is smaller, the requirements of regional power grid peak-valley adjustment cannot be met, and in addition, aiming at abandoned coal mines with a main shaft, an auxiliary shaft, a plurality of wind shafts and other pairs of vertical shafts, the traditional pumped storage scheme cannot fully utilize all the vertical shafts, the utilization of underground space resources is mainly concentrated in a tunnel cave space below the level of a generator, the vertical shaft space resources above the level of the generator cannot be fully and effectively utilized, and the gravity energy storage scheme mainly utilizes the vertical shaft space resources and cannot effectively utilize the space resources of mine water and underground water tunnels.
Disclosure of Invention
The invention aims to provide a combined energy storage system based on closing of a coal mine roadway space so as to solve the problems in the background art.
The aim of the invention can be achieved by the following technical scheme:
the combined energy storage system comprises a pumped storage system and a gravity energy storage system, wherein the pumped storage system comprises a ground coal mining subsidence area left by coal mining, a first vertical shaft, a second vertical shaft and a first horizontal roadway and a second horizontal roadway which are left by coal mining and are positioned at different depths in the ground, a water turbine generator set is fixedly arranged in the second vertical shaft, a water pump unit is fixedly arranged at the bottom of the first vertical shaft and in the second horizontal roadway, a conveying pipeline is fixedly arranged on one side of the inner wall of the first vertical shaft, one end of the conveying pipeline is fixedly connected with the water pump unit, and one end of the conveying pipeline, far away from the water pump unit, stretches into the ground coal mining subsidence area and is used for inputting water pumped by the water pump unit into the ground coal mining subsidence area;
the gravity energy storage system comprises a third vertical shaft left in coal mining, a liftable gravity block is arranged in the third vertical shaft, a gravity energy storage generator set is arranged at the top of the third vertical shaft, a connecting hanging rope is connected to the gravity energy storage generator set, and the bottom of the connecting hanging rope is fixedly connected with the center position of the top of the gravity block.
Preferably, a water blocking gate is fixedly arranged in the second horizontal roadway, and an inflatable airbag is fixedly connected to the bottom of the gravity block.
Preferably, the top of second vertical pit shaft is provided with water inlet sleeve frame, the bottom fixedly connected with inlet channel of water inlet sleeve frame, inlet channel stretches into the inside of second vertical pit shaft, the both sides fixedly connected with support frame of water inlet sleeve frame, the surface fixedly connected with protection apron of inlet channel, the top fixedly connected with protection frame of water inlet sleeve frame, fixedly connected with filter screen that the slope set up between the both sides of protection frame inner wall, one side fixedly connected with arc filter screen of filter screen, the both sides of arc filter screen and the both sides fixedly connected with of protection frame inner wall.
Preferably, one side of the protective frame, which is close to the arc-shaped filter screen, is fixedly connected with a lower trough frame, the lower trough frame is obliquely arranged, and one side of the lower trough frame is fixedly connected with one side of the water inlet sleeve frame.
Preferably, one side of the inner wall of the protective frame and the upper part of the arc-shaped filter screen are rotationally connected with a rotating shaft, and the outer surface of the rotating shaft is fixedly connected with a scraping plate.
Preferably, one side of the protection frame is fixedly connected with a bearing base, the top of the bearing base is fixedly connected with a servo motor, and one end of the rotating shaft penetrates through the water inlet sleeve frame and is fixedly connected with the output end of the servo motor.
Preferably, the top of the water inlet sleeve frame is fixedly connected with a protective sleeve cover outside the servo motor, and two sides of the protective sleeve cover are fixedly connected with edge guard plates which are obliquely arranged.
Preferably, the top fixedly connected with screw thread axle of intaking the cover frame, the both sides fixedly connected with mounting panel of lag lid inner wall, the top of screw thread axle passes the mounting panel and threaded connection has lock nut.
Preferably, the outer surface fixedly connected with welding arc board of pipeline, one side of pipeline is provided with the chucking arc cover that uses with welding arc board cooperation, the both sides fixedly connected with location card pipe of chucking arc cover.
Preferably, one side of first vertical pit shaft inner wall is provided with the location pipe box, the internal surface fixedly connected with screw sleeve of location pipe box, one side of location card pipe is provided with the locating screw, the one end of locating screw passes the location card pipe and with screw sleeve threaded connection, be provided with the delivery pipe on the protection frame.
The invention has the beneficial effects that:
the coal mining subsidence area formed during mining of the adjacent mines is adopted, the closed mine is adopted as a channel through which water flows, potential energy of water flowing falling in the second vertical shaft is converted into mechanical energy of a water turbine in the water turbine generator set, the mechanical energy of the water turbine cuts magnetic force lines to generate electricity, the magnetic force lines are converted into electric energy to generate electricity, and the water pumping energy storage power station formed by combining the mining subsidence areas and the abandoned mines can meet the requirement of high-power station installation, and a reservoir and a river channel of an energy storage system are not required to be specially built, so that space occupation and electricity generation cost are reduced.
Through taking pumped storage as the main part, the multi-well joint energy storage system taking gravity energy storage as the auxiliary part carries out make full use of to a plurality of underground roadway space resources, overground industry square land resources, vertical shaft space resources and mine water resources that have been closed or about to close the mine in the same well Tian Ouyu, can effectively promote the installed capacity of closing mine energy storage system, promote the electric wire netting and eliminate new energy and peak clipping and fill out the adjustment ability of millet, and, in the energy storage process, the buoyancy that the circulation water provided for the gravity piece in the flexible utilization pumped storage system can reduce the energy consumption that the energy storage system promoted the gravity piece needs, promote energy storage system's energy conversion efficiency.
The filter screen can filter the pollutant in the water, avoids debris to enter into the inside of second vertical pit shaft, not only can prevent debris in hydraulic turbine generating set and water pump unit department production jam, can promote the cleanliness factor of water moreover, and the impurity of filtering out can be scraped out through the rotation of scraping the flitch voluntarily, need not the debris of manual clearance filter screen top, prevents that the filter screen from blockking up.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort;
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic perspective view of the water intake housing portion of FIG. 1;
FIG. 3 is a schematic view of the structure of the guard frame portion of FIG. 2;
FIG. 4 is a schematic view of a side view of the guard frame of FIG. 3;
FIG. 5 is a schematic diagram of a side view of the protective jacket cover of FIG. 2;
FIG. 6 is a schematic view of the water intake housing portion of FIG. 2;
FIG. 7 is a schematic perspective view of the portion of the clamping arc sleeve shown in FIG. 1;
FIG. 8 is a schematic illustration of a side view of the clamping arc sleeve of FIG. 7;
fig. 9 is a cross-sectional view of the inner portion of the retention clip duct of fig. 8.
Reference numerals in the drawings are as follows:
1. the device comprises a ground coal mining subsidence area, 2, a first vertical shaft, 201, a water pump unit, 202, a conveying pipeline, 3, a second vertical shaft, 301, a water turbine generator set, 4, a third vertical shaft, 401, a gravity block, 402, a gravity energy storage generator set, 403, a connecting hanging rope, 404, an air bag, 5, a first horizontal roadway, 6, a second horizontal roadway, 9, a water inlet sleeve frame, 91, a supporting frame, 10, a water inlet pipeline, 101, a protective cover plate, 11, a protective frame, 12, a filter screen, 13, an arc filter screen, 14, a lower trough frame, 15, a rotating shaft, 16, a scraping plate, 17, a supporting base, 18, a servo motor, 19, a protective sleeve cover, 20, an edge guard plate, 21, a threaded shaft, 22, a mounting plate, 23, a locking nut, 24, a welding arc plate, 25, a clamping arc sleeve, 26, a positioning clamping clip pipe, 27, a positioning, 28, a threaded sleeve, 29, a positioning screw, 30 and a water supply pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The combined energy storage system based on the closed coal mine roadway space comprises a pumped storage system and a gravity energy storage system, wherein the pumped storage system comprises a ground coal mining subsidence area 1 left by coal mine exploitation, a first vertical shaft 2, a second vertical shaft 3 and a first horizontal roadway 5 and a second horizontal roadway 6 which are left by coal mine exploitation and are positioned at different depths underground, a water turbine generator set 301 is fixedly arranged in the second vertical shaft 3, a water pump set 201 is fixedly arranged at the bottom of the first vertical shaft 2 and in the second horizontal roadway 6, a conveying pipeline 202 is fixedly arranged on one side of the inner wall of the first vertical shaft 2, one end of the conveying pipeline 202 is fixedly connected with the water pump set 201, and one end of the conveying pipeline 202, which is far away from the water pump set 201, stretches into the ground coal mining subsidence area 1 and is used for inputting water pumped by the water pump set 201 into the ground coal mining subsidence area 1;
the gravity energy storage system comprises a third vertical shaft 4 left in coal mining, a liftable gravity block 401 is arranged in the third vertical shaft 4, a gravity energy storage generator set 402 is arranged at the top of the third vertical shaft 4, a connecting hanging rope 403 is connected to the gravity energy storage generator set 403, and the bottom of the connecting hanging rope 403 is fixedly connected with the center position of the top of the gravity block 401.
As shown in fig. 1, the coal mining subsidence area 1 is used as a water supply reservoir of a pumped storage power station when a plurality of adjacent mines are mined, a surface water source in the coal mining subsidence area is used as an upper reservoir of the pumped storage power station, a plurality of pairs of mines can be mined in a well Tian Ou, only a few tens of coal pillars can be separated between the mines, underground spaces between the mines can be easily opened, coal in the mines is in the same field (for example, coal is in-400 m and-600 m, the underground spaces of the mines are in-400 m and-600 m), and meanwhile, each pair of mines has independent vertical shafts such as a main shaft, a subsidiary shaft, a ventilation shaft and the like, so that a plurality of horizontal roadway spaces of-400 m are opened for one well Tian Ouyu, a first horizontal roadway 5 which is communicated with each other is formed, and a plurality of horizontal roadway spaces of-600 m are opened for forming a second horizontal roadway 6 which is communicated with each other;
the first vertical shaft 2, the second vertical shaft 3 and the third vertical shaft 4 can be selected from the main shaft, the auxiliary shaft and the ventilation shaft according to the requirements, and for a plurality of mines in a well field, each mine is provided with the main shaft, the auxiliary shaft and the ventilation shaft, at the moment, the main shaft, the auxiliary shaft and the ventilation shaft in one mine can be selected to be used as the first vertical shaft 2 and the second vertical shaft 3 in the pumped storage system, and the main shaft, the auxiliary shaft and the ventilation shaft in other mines are selected to be used as the third vertical shaft 4 in the gravity energy storage system, so that the vertical shafts in all areas in one well field are utilized, and the depth advantage and the space advantage of the vertical shafts are fully utilized.
The gravity energy storage generator set 403 adopts mechanical equipment (such as a synchronous generator, a turbine, an induction generator and the like) with a rotating shaft to realize energy conversion, the electric energy is converted into potential energy through the rotation of the mechanical equipment, the gravity block is lifted to a certain height and is placed on the industrial wide-area land of an original mining area, the land resource of the original industrial square is fully utilized, the gravity block is put down when the electric power system needs electric energy, the power generation equipment is driven to convert the potential energy into mechanical energy, and then the potential energy is converted into electric energy through the rotor cutting magnetic force lines.
The energy storage and release time of the pumped storage system and the gravity energy storage system can be arranged according to local wind energy and solar energy, for example, in areas with abundant wind and light resources, the pumped storage module and the gravity energy storage module can be used for storing energy according to the power grid regulation requirements in the night electricity consumption valley period, such as thermal power generation, wind power and the like which cannot be consumed; and in the peak period of electricity consumption in the daytime, the electric energy stored in the energy storage system is released, and meanwhile, the water pumping energy storage or gravity energy storage module in the energy storage system can be utilized to convert the unstable wind power and photovoltaic power generation into stable hydroelectric power or gravity power generation.
The water-blocking gate 601 is fixedly installed in the second horizontal roadway 6, and the inflatable and deflatable air bag 404 is fixedly connected to the bottom of the gravity block 401.
In the energy release process of the pumped storage system, the height of the underground water level cannot exceed the heights of the first horizontal tunnel 5 and the water turbine generator set 301, the area, below the first vertical shaft 2, the second vertical shaft 3 and the third vertical shaft 4, of the second horizontal tunnel 6 can be sealed by the water blocking gate 601, another water blocking gate can be installed on the first horizontal tunnel 5, the water turbine generator set 301 is installed above the first horizontal tunnel 5, and therefore the height of the underground water level can exceed the height of the first horizontal tunnel 5 but does not exceed the height of the water turbine generator set 301, and the water blocking gates are opened and closed together.
The top of second vertical pit shaft 3 is provided with water inlet sleeve frame 9, the bottom fixedly connected with inlet channel 10 of water inlet sleeve frame 9, inlet channel 10 stretches into the inside of second vertical pit shaft 3, the both sides fixedly connected with support frame 91 of water inlet sleeve frame 9, the surface fixedly connected with protective cover plate 101 of inlet channel 10, the top fixedly connected with protective frame 11 of water inlet sleeve frame 9, fixedly connected with filter screen 12 of slope setting between the both sides of protective frame 11 inner wall, one side fixedly connected with arc filter screen 13 of filter screen 12, the both sides of arc filter screen 13 and the both sides fixedly connected with of protective frame 11 inner wall.
As shown in fig. 1 and 2, the water supply pipe 30 is located above the higher side of the filter screen 12, the water inlet sleeve frame 9 can be supported by the support frame 91, the water inlet pipe 10 extends into the second vertical shaft 3, and the protective cover plate 101 can be attached to the upper side of the second vertical shaft 3 to prevent pollutants from entering the second vertical shaft 3.
The protection frame 11 is close to the arc filter screen 13 one side fixedly connected with down silo frame 14, down silo frame 14 slope sets up to one side of silo frame 14 and one side fixed connection of intaking cover frame 9.
As shown in fig. 2, the lower chute rest 14 has a fixing point on each of the water inlet sleeve rest 9 and the protective frame 11 to promote stability of the lower chute rest 14.
One side of the inner wall of the protective frame 11 and above the arc-shaped filter screen 13 are rotatably connected with a rotating shaft 15, and the outer surface of the rotating shaft 15 is fixedly connected with a scraping plate 16.
One side of the protection frame 11 is fixedly connected with a bearing base 17, the top of the bearing base 17 is fixedly connected with a servo motor 18, and one end of the rotating shaft 15 penetrates through the water inlet sleeve frame 9 and is fixedly connected with the output end of the servo motor 18.
As shown in fig. 4 and 5, the support base 17 provides support for the servo motor 18, the servo motor 18 is externally connected with a power supply and is provided with a corresponding control switch, and the servo motor 18 can drive the rotating shaft 15 to rotate.
The top of the water inlet sleeve frame 9 is fixedly connected with a protective sleeve cover 19 outside the servo motor 18, and two sides of the protective sleeve cover 19 are fixedly connected with edge guard plates 20 which are obliquely arranged.
As shown in fig. 4 and 5, the servo motor 18 can be provided with a rain-proof and sun-proof protection by means of a protective cover 19 and an edge guard 20.
The top of the water inlet sleeve frame 9 is fixedly connected with a threaded shaft 21, two sides of the inner wall of the protective sleeve cover 19 are fixedly connected with mounting plates 22, and the top of the threaded shaft 21 penetrates through the mounting plates 22 and is in threaded connection with locking nuts 23.
As shown in fig. 4 and 5, the mounting plate 22 can be fixed by the lock nut 23, the protecting cover 19 fixed with the mounting plate 22 is mounted above the water inlet sleeve frame 9, otherwise, when the lock nut 23 is removed, the protecting cover 19 can be moved upwards to drive the mounting plate 22 to move upwards, so that the mounting plate 22 is separated from the threaded shaft 21, and at the moment, the protecting cover 19 can be removed, thereby being convenient for overhauling and maintaining the servo motor 18.
The outer surface of the conveying pipeline 202 is fixedly connected with a welding arc plate 24, one side of the conveying pipeline 202 is provided with a clamping arc sleeve 25 matched with the welding arc plate 24, and two sides of the clamping arc sleeve 25 are fixedly connected with positioning clamping pipes 26.
One side of the inner wall of the first vertical shaft 2 is provided with a positioning pipe sleeve 27, the inner surface of the positioning pipe sleeve 27 is fixedly connected with a threaded sleeve 28, one side of the positioning clamp pipe 26 is provided with a positioning screw 29, one end of the positioning screw 29 penetrates through the positioning clamp pipe 26 and is in threaded connection with the threaded sleeve 28, and the protection frame 11 is provided with a water supply pipe 30.
As shown in fig. 7, 8 and 9, the positioning sleeve 27 is clamped into the inner wall of the first vertical shaft 2, one end of the positioning sleeve 26 extends into the positioning sleeve 27, so that the positioning sleeve 25 is clamped to the outside of the welding arc plate 24, the positioning sleeve 26 is fixed through the threaded connection of the positioning screw 29 and the threaded sleeve 28, the positioning sleeve 26 can fix the positioning sleeve 25 onto the inner wall of the first vertical shaft 2, and the welding arc plate 24 is supported by the positioning sleeve 25, so that the conveying pipeline 202 can be better positioned on the inner wall of the first vertical shaft 2.
The other end of the water supply pipe 30 is connected to a pumping system on the coal mining subsidence area 1, and water in the coal mining subsidence area 1 can be inputted into the water supply pipe 30.
The working principle of the combined energy storage system based on closing the coal mine roadway space provided by the invention is as follows:
when energy release is performed:
the water in the coal mining subsidence area 1 enters the second vertical shaft 3, gravitational potential energy of the water is converted into kinetic energy of the water, water flow impact drives a water turbine in the water turbine generator set 301 to start, the kinetic energy of the water is converted into mechanical energy of the water turbine, the mechanical energy cuts magnetic force lines to generate electricity, the electricity is converted into electric energy to generate electricity, the water in the water turbine generator set 301 is impacted to flow into the second horizontal roadway 6 and the position below the water turbine generator set 301 (the water level height does not exceed the first horizontal roadway 5), and at the moment, the water blocking gate 601 is in a closed state;
simultaneously, the air bag 404 is deflated, and the gravity block 401 is released, so that the gravity block 401 descends to drive the power generation equipment in the gravity energy storage power generation set 402 to rotate through the connecting hanging rope 403 so as to generate power.
After the gravity block 401 descends to the bottom of the third vertical shaft 4 and enters the second horizontal roadway 6, the water blocking gate 601 can be opened, and water flow in the coal mining subsidence area 1 continuously impacts the turbine generator set 301 to generate electricity, so that the water flow enters the third vertical shaft 4 through the second horizontal roadway 6 until the water level reaches a position below the generator set 301.
When energy storage is performed:
firstly, an air bag 404 is inflated, equipment in a gravity energy storage generator set 402 drives a gravity block 401 to ascend through a connecting hanging rope 403, in the ascending process of the gravity block 401, water flow entering the third vertical shaft 4 provides buoyancy for the air bag 404, the air bag 404 assists the ascending of the gravity block 401 under the action of the buoyancy, the consumption of energy in the lifting process of the gravity block 401 is reduced, the conversion from electric energy to gravitational potential energy in a gravity energy storage system is assisted, and the energy required to upwards lift the gravity block 401 is lower;
when the gravity block 401 rises to the position above the water level in the third vertical shaft 4, the water pump unit 201 is started, water in the second horizontal roadway 6 is pumped out, and then is input into the ground coal mining subsidence area 1 through the conveying pipeline 202, and then the water blocking gate 601 is closed, so that the next energy release is facilitated.
When the water in the coal mining subsidence area 1 is output through the water supply pipe 30, the water can fall into the protective frame 11, after being filtered by the filter screen 12, the water falls into the water inlet sleeve frame 9, finally falls into the second vertical shaft 3 through the water inlet pipeline 10, and sundries filtered by the filter screen 12 can flow into the arc-shaped filter screen 13 along the inclined plane of the filter screen 12;
then the servo motor 18 is started, the servo motor 18 drives the rotating shaft 15 to rotate, the rotating shaft 15 drives the scraping plate 16 to rotate, sundries in the arc-shaped filter screen 13 are scraped out of the lower trough frame 14, and the sundries in the lower trough frame 14 can be discharged along the lower trough frame 14 after the pollutants fall into the lower trough frame 14, so that the pollutants are cleaned.
Compared with the related art, the combined energy storage system based on closing the coal mine roadway space has the following beneficial effects:
the coal mining subsidence area 1 formed during mining of a plurality of adjacent mines is adopted, a closed mine is adopted as a passage through which water flows, potential energy of water flowing in the second vertical shaft 3 is utilized to be converted into mechanical energy of a water turbine in the water turbine generator set 301, magnetic force lines are cut by the mechanical energy of the water turbine to generate electricity, the mechanical energy is converted into electric energy to generate electricity, the water pump set 201 and the gravity energy storage generator set 402 drive the gravity block 401 to ascend in the energy storage process, the surplus electricity generation capacity of a power grid can be consumed, the peak clipping and valley filling effects are achieved, and a pumped storage power station formed by combining the mining subsidence areas and the abandoned mines can meet the requirements of a high-power station loader, a reservoir and a river channel of an energy storage system do not need to be specially built, and the occupation of space and the electricity generation cost are reduced.
Through taking pumped storage as the main part, the multi-well joint energy storage system taking gravity energy storage as the auxiliary part carries out make full use of to a plurality of underground roadway space resources, overground industry square land resources, vertical shaft space resources and mine water resources that have been closed or about to close the mine in the same well Tian Ouyu, can effectively promote the installed capacity of closing mine energy storage system, promote the electric wire netting and eliminate new energy and peak clipping and fill out the adjustment ability of millet, and, in the energy storage process, the buoyancy that the circulation water provided for the gravity piece in the flexible utilization pumped storage system can reduce the energy consumption that the energy storage system promoted the gravity piece needs, promote energy storage system's energy conversion efficiency.
The filter screen 12 can filter pollutants in water, so that sundries are prevented from entering the second vertical shaft 3, sundries can be prevented from blocking the water turbine generator set 301 and the water pump set 201, the cleanliness of water can be improved, filtered impurities can be automatically scraped out through the rotation of the scraping plate 16, sundries above the filter screen 12 are not required to be manually cleaned, and the filter screen 12 is prevented from being blocked.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (1)
1. The utility model provides a joint energy storage system based on shut down coal mine roadway space, includes pumped storage system and gravity energy storage system, its characterized in that: comprising the following steps: the coal mining system comprises a ground coal mining subsidence area (1) left by coal mining, a first vertical shaft (2), a second vertical shaft (3) and a first horizontal roadway (5) and a second horizontal roadway (6) which are left by coal mining and are positioned at different depths in the ground, wherein a water turbine generator set (301) is fixedly arranged in the second vertical shaft (3), a water pump set (201) is fixedly arranged at the bottom of the first vertical shaft (2) and in the second horizontal roadway (6), a conveying pipeline (202) is fixedly arranged on one side of the inner wall of the first vertical shaft (2), one end of the conveying pipeline (202) is fixedly connected with the water pump set (201), and one end of the conveying pipeline (202) away from the water pump set (201) stretches into the ground coal mining subsidence area (1) for inputting water pumped by the water pump set (201) into the ground coal mining subsidence area (1);
the gravity energy storage system comprises a third vertical shaft (4) left in coal mining, a liftable gravity block (401) is arranged in the third vertical shaft (4), a gravity energy storage generator set (402) is arranged at the top of the third vertical shaft (4), a connecting hanging rope (403) is connected to the gravity energy storage generator set (402), and the bottom of the connecting hanging rope (403) is fixedly connected with the central position of the top of the gravity block (401);
a water blocking gate (601) is fixedly arranged in the second horizontal roadway (6), and an inflatable airbag (404) is fixedly connected to the bottom of the gravity block (401);
the top of the second vertical shaft (3) is provided with a water inlet sleeve frame (9), the bottom of the water inlet sleeve frame (9) is fixedly connected with a water inlet pipeline (10), the water inlet pipeline (10) stretches into the second vertical shaft (3), two sides of the water inlet sleeve frame (9) are fixedly connected with supporting frames (91), and the outer surface of the water inlet pipeline (10) is fixedly connected with a protective cover plate (101);
the top of the water inlet sleeve frame (9) is fixedly connected with a protective frame (11), a filter screen (12) which is obliquely arranged is fixedly connected between two sides of the inner wall of the protective frame (11), one side of the filter screen (12) is fixedly connected with an arc filter screen (13), and two sides of the arc filter screen (13) are fixedly connected with two sides of the inner wall of the protective frame (11);
a lower trough frame (14) is fixedly connected to one side of the protective frame (11) close to the arc-shaped filter screen (13), the lower trough frame (14) is obliquely arranged, and one side of the lower trough frame (14) is fixedly connected with one side of the water inlet sleeve frame (9);
a rotating shaft (15) is rotatably connected to one side of the inner wall of the protective frame (11) and positioned above the arc-shaped filter screen (13), and a scraping plate (16) is fixedly connected to the outer surface of the rotating shaft (15);
one side of the protection frame (11) is fixedly connected with a bearing base (17), the top of the bearing base (17) is fixedly connected with a servo motor (18), and one end of the rotating shaft (15) penetrates through the water inlet sleeve frame (9) and is fixedly connected with the output end of the servo motor (18);
the top of the water inlet sleeve frame (9) is fixedly connected with a protective sleeve cover (19) which is positioned outside the servo motor (18), and two sides of the protective sleeve cover (19) are fixedly connected with edge guard plates (20) which are obliquely arranged;
the top of the water inlet sleeve frame (9) is fixedly connected with a threaded shaft (21), two sides of the inner wall of the protective sleeve cover (19) are fixedly connected with mounting plates (22), and the top of the threaded shaft (21) penetrates through the mounting plates (22) and is in threaded connection with a locking nut (23);
the outer surface of the conveying pipeline (202) is fixedly connected with a welding arc plate (24), one side of the conveying pipeline (202) is provided with a clamping arc sleeve (25) matched with the welding arc plate (24), and two sides of the clamping arc sleeve (25) are fixedly connected with positioning clamping pipes (26);
one side of the inner wall of the first vertical shaft (2) is provided with a positioning sleeve (27), the inner surface of the positioning sleeve (27) is fixedly connected with a threaded sleeve (28), one side of the positioning clamp pipe (26) is provided with a positioning screw (29), one end of the positioning screw (29) penetrates through the positioning clamp pipe (26) and is in threaded connection with the threaded sleeve (28), and the protective frame (11) is provided with a water supply pipe (30);
when energy release is performed:
the water in the coal mining subsidence area (1) enters the second vertical shaft (3), gravitational potential energy of the water is converted into kinetic energy of the water, water flow impact drives a water turbine in the water turbine generator set (301) to start, the water kinetic energy is converted into mechanical energy of the water turbine, the mechanical energy cuts magnetic force lines to generate electricity and is converted into electric energy to generate electricity, the water in the water turbine generator set (301) is impacted to flow into the second horizontal roadway (6) and the position below the water turbine generator set (301) so that the water level height does not exceed the first horizontal roadway (5), at the moment, a water blocking gate (601) is in a closed state and simultaneously deflates an air bag (404), and a gravity block (401) is released, so that the gravity block (401) descends to drive power generation equipment in the gravity energy storage generator set (402) to rotate through a connecting hanging rope (403) to generate electricity;
after the gravity block (401) descends to the bottom of the third vertical shaft (4) and enters the second horizontal roadway (6), a water blocking gate (601) is opened, and water flow in the coal mining subsidence area (1) continuously impacts the water turbine generator set (301) to generate electricity, so that the water flow enters the third vertical shaft (4) through the second horizontal roadway (6) until the water level reaches a position below the water turbine generator set (301);
when energy storage is performed:
firstly, an air bag (404) is inflated, equipment in a gravity energy storage generator set (402) drives a gravity block (401) to ascend through a connecting hanging rope (403), water flow entering the interior of a third vertical shaft (4) provides buoyancy for the air bag (404), the air bag (404) assists the ascent of the gravity block (401) under the action of buoyancy, energy consumption in the lifting process of the gravity block (401) is reduced, and conversion from electric energy to gravitational potential energy in a gravity energy storage system is assisted to be completed, so that the energy consumed by lifting the gravity block (401) upwards is lower;
when the gravity block (401) rises to the upper part of the water level in the third vertical shaft (4), a water pump unit (201) is started, water in the second horizontal roadway (6) is pumped out and then is input into the ground coal mining subsidence area (1) through a conveying pipeline (202), and then a water blocking gate (601) is closed, so that the next energy release is facilitated;
when the water in the coal mining subsidence area (1) is output through the water supply pipe (30), the water falls into the protective frame (11), filtered by the filter screen (12) and falls into the water inlet sleeve frame (9), finally falls into the second vertical shaft (3) through the water inlet pipe (10), and sundries filtered by the filter screen (12) flow into the arc-shaped filter screen (13) along the inclined plane of the filter screen (12);
then the servo motor (18) is started, the servo motor (18) drives the rotating shaft (15) to rotate, the rotating shaft (15) drives the scraping plate (16) to rotate, sundries in the arc-shaped filter screen (13) are scraped out of the lower trough frame (14), and the sundries in the lower trough frame (14) are discharged along the lower trough frame (14) after being dropped into the lower trough frame (14), so that the pollutants are cleaned.
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