CN110630310A - Fracturing double-horizontal-well compressed air energy storage ventilation system for coal mine well - Google Patents
Fracturing double-horizontal-well compressed air energy storage ventilation system for coal mine well Download PDFInfo
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- 238000009423 ventilation Methods 0.000 title claims abstract description 50
- 239000003245 coal Substances 0.000 title claims abstract description 40
- 238000004146 energy storage Methods 0.000 title claims abstract description 12
- 238000009835 boiling Methods 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims description 40
- 239000007924 injection Substances 0.000 claims description 40
- 239000011435 rock Substances 0.000 claims description 22
- 239000004020 conductor Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 8
- 239000002918 waste heat Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 6
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
- E21F1/085—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators using compressed gas injectors
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F3/00—Cooling or drying of air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/15—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using bent tubes; using tubes assembled with connectors or with return headers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/17—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using tubes closed at one end, i.e. return-type tubes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention provides a fracturing double-horizontal-well compressed air energy storage ventilation system for a coal mine, which relates to the technical field of underground heat energy heat exchange ventilation and comprises a fracturing double-horizontal-well heat exchange system, an underground ventilation heat exchange system and a low-boiling point working medium heat exchange system, wherein the fracturing double-horizontal-well heat exchange system is connected with the underground ventilation heat exchange system through a pipeline with a certain diameter and is provided with a mixed air box, a working medium which is subjected to heat exchange and temperature rise through a heat exchanger and a working medium which is subjected to heat exchange and temperature rise through the fracturing double-horizontal-well heat exchange system are fully mixed in the mixed air box and then are sent into the underground coal mine, and the working medium is finally discharged to the atmosphere at. The invention mainly solves the problems of inconvenient construction, incapability of achieving the expected heat exchange effect, fund waste and serious influence on underground coal mine construction and safety of mine workers caused by large volume of a heat pump heat exchange unit used in a coal mine underground ventilation system, easiness in damaging a machine when the machine is placed outdoors for a long time and the like, and is more economic and environment-friendly.
Description
Technical Field
The invention relates to the technical field of underground heat energy heat exchange ventilation, in particular to a fracturing double-horizontal-well compressed air energy storage ventilation system for a coal mine well.
Background
In the coal mining process, harmful gas in the underground coal mine can increase along with the deepening of the coal mine, and fresh air needs to be continuously injected for ensuring the life safety of workers working in the underground coal mine. In winter, the underground temperature of a coal mine is low, fresh air reaching the temperature acceptable by a human body needs to be injected, and an overground heat pump and a heat exchanger can meet the heat exchange requirement, but have the problems of large volume, difficulty in construction, easiness in damage when the machine is placed outdoors for a long time, failure in reaching the expected heat exchange temperature and the like.
Geothermal resources are renewable clean energy with great influence, have the advantages of stability, no influence of day-night temperature difference and seasonal temperature, high utilization rate, safe use, low operation cost and the like, and are very environment-friendly.
The geothermal energy reserves in China are relatively rich, the total storage capacity accounts for about 7.9 percent of the global geothermal energy reserves, and the energy which can be exploited and utilized is equivalent to 4626.5 hundred million standard coal.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a fracturing double-horizontal-well compressed air energy storage ventilation system for a coal mine, aiming at solving the problems that in the prior art, a heat pump heat exchanger used in the coal mine underground heat exchange ventilation system is large in size, a machine is easy to damage, construction is inconvenient, an expected heat exchange effect cannot be achieved, fund waste is caused, the underground construction of the coal mine and the safety of mine workers are seriously affected, and the like.
The technical scheme adopted for solving the technical problems is as follows: a fracturing double-horizontal-well compressed air energy storage ventilation system for a coal mine well comprises a fracturing double-horizontal-well heat exchange system, an underground ventilation heat exchange system and a low-boiling point working medium heat exchange system, wherein the fracturing double-horizontal-well heat exchange system and the low-boiling point working medium heat exchange system are connected with the underground ventilation heat exchange system through a mixed air box,
the fracturing double-horizontal-well heat exchange system is used for heating cold air in a natural environment compressed by an air compressor, the temperature of the cold air is enabled to reach more than 20 ℃ after the cold air is heated by the fracturing double-horizontal-well heat exchange system, and a large amount of heated compressed air is stored with underground space;
the underground ventilation heat exchange system is used for a main system for mine ventilation, hot air heated by the fracturing double-horizontal-well heat exchange system and the low-boiling-point working medium heat exchange system is sent into a mine through an air supply well and then discharged from an air return well so as to meet the production requirement of the mine;
the low-boiling point working medium heat exchange system is used for utilizing return air waste heat of the return air shaft, the heat exchanger can be used for transferring the return air waste heat to the low-boiling point working medium, the heated low-boiling point working medium is pumped to the other heat exchanger, and the heat exchanger is also used for heating cold air from the natural environment, so that the return air waste heat is utilized;
and the working medium after heat exchange and temperature rise of the working medium flowing through the low-boiling point working medium heat exchange system and the working medium after heat exchange and temperature rise of the fracturing double-horizontal well heat exchange system are fully mixed in the mixed air box and then sent into an underground coal mine in the underground ventilation and heat exchange system, and the mixed working medium is subjected to heat exchange by a heat exchanger at the tail end of the underground ventilation and heat exchange system and then discharged to the atmosphere.
Furthermore, the fracturing double-horizontal-well heat exchange system comprises three subsystems including an injection system, a heat exchange system and a discharge system, wherein the injection system is connected with an injection end of the heat exchange system and is used for injecting heat exchange working media; the heat exchange system is used for realizing heat exchange between the working medium and the shallow rock body; the discharge system is connected with the discharge end of the heat exchange system and is used for conveying the working medium subjected to heat exchange into the mixing air box.
Specifically, the injection system comprises an air compressor, a valve, an injection pipe, a first isolating and conducting material and a first working medium; the heat exchange system comprises a shallow rock body and a heat exchange fracturing well hole; the discharge system comprises a discharge pipe, a second insulating and conducting material and a second working medium; the first isolating and conducting material is filled between the outer wall of the injection pipe and the shallow rock body, the second isolating and conducting material is filled between the outer wall of the discharge pipe and the shallow rock body, the injection pipe and the discharge pipe both extend into the shallow rock body, the lower ends of the injection pipe and the discharge pipe extend horizontally and parallelly in the same direction, the tail ends of the injection pipe and the discharge pipe are communicated through a heat exchange fracturing well hole formed by fracturing, and a certain amount of working medium is injected into the injection pipe.
The heat exchange fracturing well hole is a gap formed by fracturing the tail ends of two horizontal wells so that the two horizontal wells are communicated, and the fracturing position is easy for fluid to flow, so that the heat exchange speed can be increased.
The fracturing double-horizontal-well heat exchange system adopts the following scheme:
step 1: according to the geological exploration result, selecting shallow rock bodies (such as granite, metamorphic rock and the like) with proper positions and compact texture, and constructing two wells at the positions according to the required heat exchange quantity and the well diameter, the well depth and the well distance calculated by the geothermal gradient.
Step 2: the lower ends of the two wells are horizontally parallel, and the tail ends of the two wells are fractured to form heat exchange fracturing well holes, so that the tail ends of the two wells are communicated.
And step 3: and establishing an injection system, installing an injection pipe in one of the wells, and filling the first isolation conductive material.
And 4, step 4: and establishing a discharge system, installing a discharge pipe in the other well, and filling a second insulating conductive material.
And 5: the injection system is connected with the ground through a pipeline and is provided with an air compressor and a valve, the discharge system is connected with the underground ventilation and heat exchange system through a pipeline with a certain diameter and is provided with a blower, a valve and a mixed air box.
Further, the underground ventilation heat exchange system comprises a first blower, a second blower, a third blower, a first heat exchanger, a second heat exchanger, a mixed air box, a third working medium, a fourth working medium, a fifth working medium and a sixth working medium, wherein the first blower is arranged at the outlet end of the discharge pipe and pumps the second working medium into the mixed air box; the inlet end of the first heat exchanger is connected with a third air feeder; the outlet end of the first heat exchanger is connected with the mixing air box, and a working medium IV is formed between the first heat exchanger and the mixing air box; the mixed air bellow is connected with the initial end of the underground coal mine through a pipeline; the second heat exchanger is connected with the tail end of the underground coal mine through a second air feeder; the air feeder three-purpose is used for inputting a working medium three, the working medium three forms a working medium four after passing through the heat exchanger one, the working medium four and the working medium two are mixed and then enter the underground coal mine to form a working medium five, and the working medium five forms a working medium six after passing through the air feeder two and the heat exchanger two and is discharged.
Furthermore, the low-boiling point working medium heat exchange system is arranged between the first heat exchanger and the second heat exchanger, and a low-boiling point working medium circulates in the low-boiling point working medium heat exchange system.
And the working medium six is gas exhausted to the atmosphere after ventilation of a mine.
The invention has the beneficial effects that:
1. energy is saved, and shallow geothermal energy is fully utilized;
2. the ground space is saved, the appearance is neat and beautiful, and the damage is not easy to happen;
3. the well diameter is small, and the ground building is not affected;
4. the heat exchange capacity is effectively improved, and the heat exchange working medium reaches the required heat exchange temperature;
5. working media with different temperatures are fully mixed in the mixing air box, so that the heat exchange speed is improved, and the service life of the system is prolonged;
6. the underground pipe is filled with a conduction material, so that the pipe is corrosion-resistant, high-pressure-resistant and high-temperature-resistant, and the service life of the system is longer.
7. The fluid can easily flow when being fractured at the tail ends of two underground horizontal wells, so that the fluid heat exchange speed is increased, and the heat exchange effect is enhanced.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a diagram of a compressed air energy storage ventilation system of a fractured double horizontal well for a coal mine;
in the figure: the system comprises a 1-air compressor, a 2-valve, a 3-injection pipe, a 4-working medium I, a 5-insulating conduction type material I, a 6-heat exchange fracturing well hole, a 7-shallow rock body, an 8-insulating conduction type material II, a 9-working medium II, a 10-discharge pipe, an 11-air feeder I, a 12-valve, a 13-valve, a 14-working medium V, a 15-underground coal mine, a 16-air feeder II, a 17-valve, an 18-heat exchanger II, a 19-working medium III, a 20-air feeder III, a 21-valve, a 22-heat exchanger I, a 23-working medium IV, a 24-valve, a 25-mixed air box, a 26-low boiling point working medium and a 27-working medium VI.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
As shown in figure 1, the fracturing double-horizontal-well compressed air energy storage and ventilation system for the coal mine well comprises a fracturing double-horizontal-well heat exchange system, an underground ventilation heat exchange system and a low-boiling point working medium heat exchange system, wherein the fracturing double-horizontal-well heat exchange system and the low-boiling point working medium heat exchange system are connected with the underground ventilation heat exchange system through a mixed air box 25,
the fracturing double-horizontal-well heat exchange system is used for heating cold air in a natural environment compressed by an air compressor, the temperature of the cold air is enabled to reach more than 20 ℃ after the cold air is heated by the fracturing double-horizontal-well heat exchange system, and a large amount of heated compressed air is stored with underground space;
the low boiling point working medium heat exchange system is used for utilizing return air waste heat of the return air shaft, the heat exchanger can be used for transferring the return air waste heat to the low boiling point working medium 26, the heated low boiling point working medium 26 is pumped to another heat exchanger, and the heat exchanger is also used for heating cold air from the natural environment, so that the return air waste heat is utilized;
the underground ventilation heat exchange system is a main system for mine ventilation, and the system sends hot air heated by the fracturing double-horizontal-well heat exchange system and the low-boiling-point working medium heat exchange system into a mine through an air supply well and discharges the hot air from an air return well so as to meet the production requirement of the mine;
the fracturing double-horizontal-well heat exchange system is connected with the underground ventilation heat exchange system through a pipeline with a certain diameter and is provided with a mixed air box 25, a working medium four 23 subjected to heat exchange and temperature rise through a heat exchanger one 22 and a working medium two 9 subjected to heat exchange and temperature rise through the fracturing double-horizontal-well heat exchange system are fully mixed in the mixed air box 25 and then are sent into the underground coal mine 15, and a working medium five 14 is finally discharged to the atmosphere through a heat exchanger at the tail end of the underground ventilation heat exchange system by a working medium six 27 with an appropriate temperature.
The fracturing double-horizontal-well heat exchange system comprises three subsystems, namely an injection system, a heat exchange system and a discharge system, wherein the injection system is connected with an injection end of the heat exchange system and is used for injecting a heat exchange working medium; the heat exchange system is used for realizing heat exchange between the working medium and the shallow rock body 7; the discharge system is connected with the discharge end of the heat exchange system and is used for conveying the working medium subjected to heat exchange into the mixing air box 25.
Specifically, the injection system comprises an air compressor 1, a valve 2, an injection pipe 3, a first isolation and conduction type material 5 and a first working medium 4; the heat exchange system comprises a shallow rock body 7 and a heat exchange fracturing well hole 6; the discharge system comprises a discharge pipe 10, a second isolation and conduction type material 8 and a second working medium 9; the heat exchange fracturing device is characterized in that a first isolating and conducting material 5 is filled between the outer wall of the injection pipe and a shallow rock body 7, a second isolating and conducting material 8 is filled between the outer wall of the discharge pipe 10 and the shallow rock body 7, the injection pipe 3 and the discharge pipe 10 extend into the shallow rock body 7, the lower ends of the injection pipe 3 and the discharge pipe 10 extend horizontally and parallelly in the same direction, the tail ends of the injection pipe 3 and the discharge pipe 10 are communicated through a heat exchange fracturing well hole 6 formed by fracturing, a first working medium 4 is formed in the injection pipe 3, and the first working medium 4 flows through the heat exchange fracturing well hole 6 to be subjected to heat exchange and then is discharged into the discharge pipe 10 to form a second working medium 9.
The heat exchange fracturing well 6 is a gap formed by fracturing the tail ends of two horizontal wells so that the two horizontal wells are communicated, and the fracturing position is easy for fluid to flow, so that the heat exchange speed can be increased.
The heat exchange system of the fracturing double horizontal wells adopts the following implementation modes:
1. according to the geological exploration result, selecting a shallow rock body 7 (such as granite, metamorphic rock and the like) with a proper position and compact texture, and constructing two wells at the position according to the required heat exchange amount and the well diameter, the well depth and the well distance calculated by the geothermal gradient.
2. The two wells are horizontally parallel at their lower ends and are fractured at their ends to form heat exchange fractured wellbores 6.
3. And selecting a well, installing an injection pipe 3 in the well, carrying out cement reinforcement, and filling a first isolation conductive material 5 outside the injection pipe 3 to form an injection system.
4. And a discharge pipe 10 is arranged in the other well, cement reinforcement is carried out, and a second insulating and conducting material 8 is filled outside the discharge pipe 10 to form a discharge system.
5. And the working medium quantities of the working medium I4 and the working medium II 9 calculated according to the required heat exchange quantity are injected into the injection pipe 3, the discharge pipe 10 and the heat exchange fracturing well 6 at one time.
6. The top of the injection system is connected with an air compressor 1 and a valve 2, and the tail end of the discharge system is connected with a downhole ventilation and heat exchange system and is provided with a mixing air box 25, a valve 12 and a blower 11.
The underground ventilation heat exchange system comprises a first blower 11, a second blower 16, a third blower 20, a first heat exchanger 22, a second heat exchanger 18, a mixed air box 25, a third working medium 19, a fourth working medium 23, a fifth working medium 14 and a sixth working medium 27, wherein the first blower 11 is arranged at the outlet end of the discharge pipe 10 and pumps the second working medium 9 into the mixed air box 25, and a valve 12 is arranged on a pipeline between the mixed air box 25 and the first blower 11; the inlet end of the first heat exchanger 22 is connected with a third blower 20, and a valve 21 is arranged between the inlet end and the third blower; the outlet end of the first heat exchanger 22 is connected with a mixing air box 25, a valve 24 is arranged between the outlet end of the first heat exchanger 22 and the mixing air box 25, and a working medium four 23 is formed between the first heat exchanger 22 and the mixing air box 25; the mixed air box 25 is connected with the initial end of the underground coal mine 15 through a pipeline, and a valve 13 is arranged on the pipeline between the mixed air box and the underground coal mine 15; the second heat exchanger 18 is connected with the tail end of the underground coal mine 15 through a second air suction pump 16, and a valve 17 is arranged on a pipeline between the second heat exchanger 18 and the second air blower 16; in the low-boiling point working medium heat exchange system, a low-boiling point working medium 26 circulates between the first heat exchanger 22 and the second heat exchanger 18.
The working medium I4 enters the injection pipe 3 through the air compressor 1 and flows to the heat exchange fracturing branch well hole 6, the working medium II 9 is changed into a working medium II 9 through heat exchange and temperature rise of a shallow rock body 7 and enters the discharge pipe 10, the working medium II 9 enters the mixed air box 25 through the air feeder 11, the working medium III 19 enters the heat exchanger I22 through the air feeder 20 and is changed into a working medium IV 23 through heat exchange and temperature rise, the working medium IV 23 and the working medium II 9 are fully mixed in the mixed air box 25 and are changed into a working medium V14, then the working medium V14 flows to the tail end of the underground coal mine 15, and the working medium V14 enters the heat exchanger II 18 through the air feeder 16 and is changed into a.
The invention adopts the principle of geothermal compressed air energy storage to solve the outstanding problems that the traditional air source heat pump for mine ventilation in winter has high heating energy consumption, a coal-fired boiler is not energy-saving in heating, pollutant emission exceeds standard and the like. The geothermal resource is a main heat source for ventilation and heating of the coal mine, geothermal energy can be transferred to mine ventilation by using the system so as to meet the requirement of the mine ventilation on temperature in winter, and in addition, fluid can easily flow by fracturing at the tail ends of two underground horizontal wells, so that the fluid heat exchange speed is accelerated, and the heat exchange effect is enhanced.
In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a colliery is two horizontal well compressed air energy storage ventilation system of fracturing for well which characterized in that: comprises a fracturing double-horizontal-well heat exchange system, an underground ventilation heat exchange system and a low boiling point working medium heat exchange system, wherein the fracturing double-horizontal-well heat exchange system and the low boiling point working medium heat exchange system are connected with the underground ventilation heat exchange system through a mixed air box,
the fracturing double-horizontal-well heat exchange system is used for heating cold air in a natural environment after being compressed by an air compressor;
the underground ventilation heat exchange system is used for a main system for mine ventilation;
the low boiling point working medium heat exchange system is used for utilizing return air waste heat of the return air shaft, the heat exchanger can be utilized to transfer the return air waste heat to the low boiling point working medium through the system, the heated low boiling point working medium is pumped to the other heat exchanger, and the heat exchanger is also used for heating cold air from the natural environment;
and the working medium after heat exchange and temperature rise of the working medium flowing through the low-boiling point working medium heat exchange system and the working medium after heat exchange and temperature rise of the fracturing double-horizontal well heat exchange system are fully mixed in the mixed air box and then sent into an underground coal mine in the underground ventilation and heat exchange system, and the mixed working medium is subjected to heat exchange by a heat exchanger at the tail end of the underground ventilation and heat exchange system and then discharged to the atmosphere.
2. The fracturing double-horizontal-well compressed air energy-storing ventilation system for the coal mine well, according to claim 1, is characterized in that: the fracturing double-horizontal-well heat exchange system comprises three subsystems, namely an injection system, a heat exchange system and a discharge system, wherein the injection system is connected with an injection end of the heat exchange system and is used for injecting a heat exchange working medium; the heat exchange system is used for realizing heat exchange between the working medium and the shallow rock body; the discharge system is connected with the discharge end of the heat exchange system and is used for conveying the working medium subjected to heat exchange into the mixing air box.
3. The fracturing double-horizontal-well compressed air energy-storing ventilation system for the coal mine well, according to claim 2, is characterized in that: the injection system comprises an air compressor, a valve, an injection pipe, a first heat insulation and conduction type material and a first working medium; the fracturing double-horizontal-well heat exchange system comprises a shallow rock body and a heat exchange fracturing well hole; the discharge system comprises a discharge pipe, a second insulating and conducting material and a second working medium; the heat exchange fracturing device comprises an injection pipe, a shallow rock body, a discharge pipe, a first isolation conduction material, a second isolation conduction material, a first heat exchange fracturing well hole, a first working medium and a second working medium, wherein the first isolation conduction material is filled between the outer wall of the injection pipe and the shallow rock body, the second isolation conduction material is filled between the outer wall of the discharge pipe and the shallow rock body, the injection pipe and the discharge pipe both extend into the shallow rock body, the lower ends of the injection pipe and the lower ends of the discharge pipe extend in the same direction in a horizontal parallel mode, the tail ends of the injection pipe and the discharge pipe are communicated through the heat exchange fracturing well hole formed by fracturing, the first working medium is formed.
4. The fracturing double-horizontal-well compressed air energy-storing ventilation system for the coal mine well, according to claim 3, is characterized in that: the heat exchange fracturing well hole is a gap formed by fracturing and communicating the tail ends of two horizontal wells.
5. The fracturing double-horizontal-well compressed air energy-storing ventilation system for the coal mine well, according to claim 3, is characterized in that: the underground ventilation heat exchange system comprises a first blower, a second blower, a third blower, a first heat exchanger, a second heat exchanger, a mixed air box, a third working medium, a fourth working medium, a fifth working medium and a sixth working medium, wherein the first blower is arranged at the outlet end of the discharge pipe and pumps the second working medium into the mixed air box; the inlet end of the first heat exchanger is connected with a third air feeder; the outlet end of the first heat exchanger is connected with the mixing air box, and a working medium IV is formed between the first heat exchanger and the mixing air box; the mixed air bellow is connected with the initial end of the underground coal mine through a pipeline; the second heat exchanger is connected with the tail end of the underground coal mine through a second air pump; the air feeder three-purpose is used for inputting a working medium three, the working medium three forms a working medium four after passing through the heat exchanger one, the working medium four and the working medium two are mixed and then enter the underground coal mine to form a working medium five, and the working medium five forms a working medium six after passing through the air feeder two and the heat exchanger two and is discharged.
6. The fracturing double-horizontal-well compressed air energy-storage ventilation system for the coal mine well, according to claim 5, is characterized in that: the low-boiling point working medium heat exchange system is arranged between the first heat exchanger and the second heat exchanger, and a low-boiling point working medium circulates in the low-boiling point working medium heat exchange system.
7. The fracturing double-horizontal-well compressed air energy-storage ventilation system for the coal mine well, according to claim 5, is characterized in that: and the working medium six is gas exhausted to the atmosphere after ventilation of a mine.
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| CN201910837583.6A CN110630310A (en) | 2019-09-05 | 2019-09-05 | Fracturing double-horizontal-well compressed air energy storage ventilation system for coal mine well |
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| CN201910837583.6A CN110630310A (en) | 2019-09-05 | 2019-09-05 | Fracturing double-horizontal-well compressed air energy storage ventilation system for coal mine well |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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