CN106150539A - A kind of high temperature getting working face liquid CO2freezing by change of state heat sink and method - Google Patents
A kind of high temperature getting working face liquid CO2freezing by change of state heat sink and method Download PDFInfo
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- CN106150539A CN106150539A CN201610718437.8A CN201610718437A CN106150539A CN 106150539 A CN106150539 A CN 106150539A CN 201610718437 A CN201610718437 A CN 201610718437A CN 106150539 A CN106150539 A CN 106150539A
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- 239000007788 liquid Substances 0.000 title claims abstract description 138
- 230000008859 change Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 57
- 238000007710 freezing Methods 0.000 claims abstract description 22
- 238000009423 ventilation Methods 0.000 claims abstract description 17
- 238000005065 mining Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005057 refrigeration Methods 0.000 description 22
- 230000008901 benefit Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008016 vaporization Effects 0.000 description 4
- 238000009834 vaporization Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 230000007261 regionalization Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Substances OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
Abstract
A kind of high temperature getting working face liquid CO2Freezing by change of state heat sink and method, belong to underground coal mine falling temperature technique field, high temperature getting working face liquid CO of the present invention2Freezing by change of state heat sink, including ventilation blower, air duct, liquid CO2Holding vessel, liquid CO2Conveying pipe, heat exchanger, gaseous state CO2Delivery pipe；Liquid CO2Holding vessel sets out mouth, and heat exchanger sets liquid CO2Input port and gaseous state CO2Floss hole；Liquid CO2Conveying pipe sets the first Pressure gauge and the first valve, gaseous state CO successively2Delivery pipe sets the second valve and the second Pressure gauge successively.During work, start ventilation blower, distinguished and admirable deliver to getting working face；Open the first valve, liquid CO2Flow to cooling coil；Flow through heat exchanger distinguished and admirable with cooling coil liquid CO2Heat exchange is lowered the temperature, and forms cooling airflow, it is achieved getting working face is lowered the temperature.The present invention utilizes liquid CO2Cold, it is achieved underground coal mine is lowered the temperature, reduces production cost, and labor productivity is greatly improved.
Description
Technical field:
The invention belongs to underground coal mine falling temperature technique field, particularly relate to a kind of high temperature getting working face liquid CO2Phase
Become refrigeration cooling device and method.
Background technology:
Along with the development of China's mining industry, being continuously increased of coal mining depth, high-temperature mine number is consequently increased,
Climatic regionalization problem is more prominent, Deep Mine Climatic regionalization problem be increasingly becoming restriction deep exploitation of coal resources important because of
Element, mine cooling problem is the Tough questions that China's mining faces, and becomes after top board, gas, water, fire, dust
Six big mine natural calamities.
Tradition falling temperature technique includes on-mechanical refrigeration cool-down technology and the big class of mechanical refrigeration falling temperature technique two.On-mechanical freezes
Technology include optimize development arrange, optimize ventilation network, increase air quantity, controlled circulation wind, power of calming the anger, pre-cooling coal seam,
Comprehensive completion method management top board, crag are heat insulation, hot water white-out pipe insulation, stratum heat accumulation；Mechanical refrigeration include water cooling system,
Ice cooling system, thermo-electrically-ethylene glycol cryogenic refrigeration cooling system, the light air conditioning chamber of mine, cooling clothes etc..From domestic and international application
From the point of view of situation, Climatic regionalization, than more prominent mine, takes the in the majority of mechanical refrigeration cooling method.Mechanical refrigeration falling temperature technique warp
It's decades the pasting development has become as the mine cooling Refrigeration Technique of a comparative maturity, but owing to China's refrigeration plant still depends on
Rely import, and the popularization of factor the limits mine air conditioner such as the refrigeration plant of import is expensive, power consumption is big.And import equipment
Running and maintenance cost is the highest, the refrigeration plant causing some coal mining enterprises to introduce lacks parts even in idle shape
State.The mine air conditioner refrigeration cool-down technology of China does not obtain preferable effect.
Utilize liquid CO2As refrigerant, while obtaining preferable cooling-down effect, it is possible to reduce CO2In air
Discharge capacity, reaches social benefit and the environmental benefit of energy-saving and emission-reduction；CO2Fusing point is-56.57 DEG C, now turns through vaporization
After being changed to gaseous state, temperature releases cold when reaching 20 DEG C is 411.94kJ/kg, has that vaporization rate is fast, that to release cold big etc. is excellent
Point, can effectively improve refrigerating efficiency, reaches the purpose of cooling.
Summary of the invention:
The deficiency existed for prior art, the invention provides a kind of high temperature getting working face liquid CO2Freezing by change of state
Heat sink and method, use liquid CO2Refrigeration is lowered the temperature, and reduces production cost, protects environment, and production effect is greatly improved
Rate.
For achieving the above object, the present invention is by the following technical solutions:
A kind of high temperature getting working face liquid CO2Freezing by change of state heat sink, including ventilation blower, air duct, liquid CO2Store
Tank, liquid CO2Conveying pipe, heat exchanger and gaseous state CO2Delivery pipe；
Described liquid CO2Holding vessel is provided with outlet, and described heat exchanger is provided with liquid CO2Input port and gaseous state CO2Discharge
Mouthful；
Described ventilation blower is connected with heat exchanger one end by air duct, and the described heat exchanger other end passes through air duct and digging
Work surface connects, described liquid CO2Holding vessel passes through liquid CO2Conveying pipe and liquid CO of heat exchanger2Input port connects, institute
The gaseous state CO of the heat exchanger stated2Floss hole passes through gaseous state CO2Delivery pipe connects with goaf；
Described liquid CO2On conveying pipe, by liquid CO2Holding vessel outlet is sequentially provided with the first pressure to heat exchanger orientation
Table and the first valve, described gaseous state CO2On delivery pipe, by gaseous state CO2Floss hole is sequentially provided with the second valve to the direction in goaf
Door and the second Pressure gauge.
Described heat exchanger includes that cooling coil and housing, described cooling coil are arranged in housing, cooling coil one
End is by liquid CO2Input port and liquid CO2Conveying pipe connects, and the cooling coil other end passes through gaseous state CO2Floss hole and gaseous state
CO2Delivery pipe connects.
Described cooling coil is arranged according to the mode of serpentine coil, and pipeline external form is star-like heat exchange fin.
The first described valve, is used for controlling liquid CO2Liquid CO in holding vessel2Flow.
The first described Pressure gauge, is used for monitoring liquid CO2Holding vessel exit liquid CO2Force value.
The second described valve, is used for controlling liquid CO2Conveying overpressure and gaseous state CO2Discharge.
The second described Pressure gauge, is used for monitoring discharge gas CO2Force value.
Described high temperature getting working face liquid CO2Freezing by change of state heat sink is arranged in tunnel, and wherein, described is logical
Blower fan is installed in intake, and described air duct and heat exchanger are all hung in back, described liquid CO by hook2Defeated
Pipe is sent to be laid on wall.
Described ventilation blower is booster.
Described liquid CO2Conveying outer tube layer is provided with heat-insulation layer.
Described liquid CO2Conveying pipe is in series by some unit conveying pipe, passes through flange between each unit conveying pipe
Dish connects, and ring flange seam is equipped with packing ring.
Described gaseous state CO2Delivery pipe is in series by some unit delivery pipes, by quickly between each unit delivery pipe
Joint connects.
Described liquid CO2Conveying pipe compressive resistance is not higher than-57 DEG C at more than 5MP, heatproof lower limit.
Described ventilation blower, for providing ventilation power for whole refrigeration cooling device, the most also provides for getting working face
Distinguished and admirable.
Described liquid CO2Conveying pipe is for by liquid CO2Liquid CO in holding vessel2It is transported to the cooler pan of heat exchanger
Pipe.
Described liquid CO2Holding vessel is used for storing liquid CO2。
Described liquid CO2For the refrigerant as whole refrigeration cooling device.
Described air duct for conveying by distinguished and admirable ventilation blower to heat exchanger and from heat exchanger to getting working face
Between distinguished and admirable.
Described heat exchanger is for by liquid CO2Be converted to gaseous state CO2, discharge in the biphase transformation process of liquid-gas is cold simultaneously
Amount for cooling by air duct be transported in heat exchanger distinguished and admirable, reduce the purpose of airflow temperature.
Described gaseous state CO2Delivery pipe is for by liquid CO2The gaseous state CO be converted to after heat exchanger2It is discharged into mined out
District.
High temperature getting working face liquid CO described in employing2Freezing by change of state heat sink carries out the method lowered the temperature, including with
Lower step:
Step 1: start ventilation blower, distinguished and admirable by air duct, it is delivered to getting working face through heat exchanger；
Step 2: open the first valve, liquid CO2By liquid CO2Conveying pipe flow to the cooling coil of heat exchanger, with
Time, by the first Pressure gauge monitoring liquid CO2Holding vessel outlet pressure value, when liquid CO2The force value in holding vessel exit is low
When 0.52MPa, change liquid CO2Holding vessel；
Step 3: flow through the distinguished and admirable of heat exchanger, with liquid CO of cooling coil2Carry out heat exchange cooling, form cooling airflow,
Cooling airflow is transported to getting working face by air duct, it is achieved getting working face is lowered the temperature；
Step 4: liquid CO in cooling coil2Through undergoing phase transition after distinguished and admirable heat exchange, by liquid CO2It is changed into gaseous state
CO2, and through gaseous state CO2Delivery pipe is delivered to goaf.
Liquid CO described in step 22, due to liquid CO2There is high pressure, after the first valve is opened, liquid CO2Pass through liquid
State CO2Conveying pipe active Flow is to the cooling coil of heat exchanger.
A kind of high temperature getting working face liquid CO that the present invention provides2Freezing by change of state cool-down method is to utilize liquid CO2Convert
For gaseous state CO2During release cold energy reduce the airflow temperature flowing through heat exchanger, reduce the wind of getting working face with this
Stream temperature, provides comfortable working environment for staff.
Beneficial effects of the present invention:
1, CO in commercial production2Exhaust emissions amount is relatively big, becomes industrial side-product by compression after being purified.By it
It is applied to coal mine down-hole refrigeration cooling, it is possible to reduce CO2Discharge capacity in air, alleviates greenhouse effect, has good ring
Border benefit；
2, liquid CO2Being industrial side-product, cost is relatively low, cheap, is applied to coal mine down-hole refrigeration cooling,
Can significantly reduce refrigeration cool-down expense, reduce the production cost in colliery, there is good economic benefit；
3, liquid CO2Fusing point is-56.57 DEG C, and now after vaporization is converted to gaseous state, temperature reaches to put when 20 DEG C
Going out cold is 411.94kJ/kg, has the advantages such as vaporization rate is fast, releasing cold is big, can be effectively improved refrigerating efficiency；
4, the refrigeration cool-down technology of the present invention, is to carry out local cooling for colliery high temperature getting working face, it is therefore an objective to for
Staff provides comfortable working environment, ensures healthy, raises labour productivity, and sets compared to traditional air conditioner refrigerating
Standby huge refrigeration expense produced to the cooling of full blast stream, has obvious advantage.
Accompanying drawing illustrates:
Fig. 1 is high temperature getting working face liquid CO of the present invention2Freezing by change of state heat sink structural representation；
Wherein, 1-booster；2-liquid CO2Holding vessel；3-air duct；4-the first Pressure gauge；5-liquid CO2Conveying pipe；
6-the first valve；7-heat exchanger；8-gaseous state CO2Delivery pipe；9-cooling coil；10-housing；11-the second Pressure gauge；12-second
Valve.
Detailed description of the invention:
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
As it is shown in figure 1, high temperature getting working face liquid CO2Freezing by change of state heat sink, including booster 1, air duct
3, liquid CO2Holding vessel 2, liquid CO2Conveying pipe 5, heat exchanger 7, gaseous state CO2Delivery pipe 8；
Described liquid CO2Holding vessel 2 is provided with outlet, and described heat exchanger 7 is provided with liquid CO2Input port and gaseous state CO2Row
Put mouth；
Described booster 1 is connected with heat exchanger 7 one end by air duct 3, and described heat exchanger 7 other end passes through wind
Cylinder 3 connects with getting working face, described liquid CO2Holding vessel 2 is by liquid CO2Conveying pipe 5 and liquid CO of heat exchanger 72Defeated
Entrance connects, the gaseous state CO of described heat exchanger 72Floss hole passes through gaseous state CO2Delivery pipe 8 connects with goaf；
Described liquid CO2On conveying pipe 5, by liquid CO2Holding vessel outlet is sequentially provided with the first pressure to heat exchanger orientation
Table 4 and the first valve 6, described gaseous state CO2On delivery pipe 8, by gaseous state CO2Floss hole is sequentially provided with to the direction in goaf
Two valve 12 and the second Pressure gauges 11.
The first described valve 6, is used for controlling liquid CO2Liquid CO in holding vessel 22Flow.
The first described Pressure gauge 4, is used for monitoring liquid CO2Holding vessel 2 exit liquid CO2Force value.
The second described valve 12, is used for controlling liquid CO2Pressure and gaseous state CO in conveying pipe 52Discharge.
The second described Pressure gauge 11, is used for monitoring discharge gas CO2Force value.
Described heat exchanger 7 includes that cooling coil 9 and housing 10, described cooling coil 9 are arranged in housing 10, cooling
Liquid CO is passed through in coil pipe 9 one end2Input port and liquid CO2Conveying pipe 5 connects, and cooling coil 9 other end passes through gaseous state CO2Discharge
Mouth and gaseous state CO2Delivery pipe 8 connects.
Described high temperature getting working face liquid CO2Freezing by change of state heat sink is arranged in tunnel, wherein, and described office
Portion's ventilation blower 1 is installed in intake, and described air duct 3 and heat exchanger 7 are all hung at back, described liquid by hook
State CO2Conveying pipe 5 is laid on wall.
Described cooling coil 9 is arranged according to the mode of serpentine coil, and pipeline external form is star-like heat exchange fin.
Described liquid CO2Conveying pipe 5 outer layer is provided with heat-insulation layer.
Described liquid CO2Conveying pipe 5 is in series by some unit conveying pipe, passes through flange between each unit conveying pipe
Dish connects, and ring flange seam is equipped with packing ring.
Described gaseous state CO2Delivery pipe 8 is in series by some unit delivery pipes, by quickly between each unit delivery pipe
Joint connects.
Described liquid CO2Conveying pipe 5 compressive resistance is not higher than-57 DEG C at more than 5MP, heatproof lower limit.
Described booster 1, for providing ventilation power for whole refrigeration cooling device, is also mining work simultaneously
Face provides fresh distinguished and admirable.
Described liquid CO2Conveying pipe 5 is for by liquid CO2Liquid CO in holding vessel 22It is transported to the cooling of heat exchanger 7
Coil pipe 9.
Described liquid CO2Holding vessel 2 is for storing liquid CO2。
Described liquid CO2For the refrigerant as whole refrigeration cooling device.
Described air duct 3 for conveying by distinguished and admirable booster 1 to heat exchanger 7 and from heat exchanger 7 to adopting
Pick work surface between distinguished and admirable.
Described heat exchanger 7 is for by liquid CO2Be converted to gaseous state CO2, release in the biphase transformation process of liquid-gas simultaneously
Cold for cooling by air duct 3 be transported in heat exchanger 7 distinguished and admirable, reduce the purpose of airflow temperature.
Described gaseous state CO2Delivery pipe 8 is for by liquid CO2The gaseous state CO be converted to after heat exchanger 72It is discharged into and adopts
Dead zone.
High temperature getting working face liquid CO of the present embodiment2Freezing by change of state cool-down method, comprises the following steps:
Step 1: start booster 1, distinguished and admirable by air duct 3, it is delivered to getting working face through heat exchanger 7；
Step 2: open the first valve 6, liquid CO2Owing to having high pressure, therefore by liquid CO2Conveying pipe 5 active flow
Move the cooling coil 9 of heat exchanger 7, meanwhile, monitor liquid CO by the first Pressure gauge 42Holding vessel 2 outlet pressure value, when
Liquid CO2When the force value in holding vessel 2 exit is less than 0.52MPa, change liquid CO2Holding vessel 2；
Step 3: flow through the distinguished and admirable of heat exchanger 7, with liquid CO of cooling coil 92Carry out heat exchange cooling, form cooling wind
Stream, cooling airflow is transported to getting working face by air duct 3, it is achieved getting working face is lowered the temperature；
Step 4: liquid CO in cooling coil 92Through undergoing phase transition after distinguished and admirable heat exchange, by liquid CO2It is changed into gaseous state
CO2, and through gaseous state CO2Delivery pipe 8 is delivered to goaf.
Finally it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit, although
Being described in detail the present invention with reference to previous embodiment, foregoing embodiments can be remembered by those skilled in the art
The technical scheme carried is modified, or wherein portion of techniques feature carries out equivalent, and these amendments or replacement, and
The essence not making appropriate technical solution departs from the scope of embodiment of the present invention technical scheme.
Claims (10)
1. high temperature getting working face liquid CO2Freezing by change of state heat sink, it is characterised in that include ventilation blower, air duct, liquid
State CO2Holding vessel, liquid CO2Conveying pipe, heat exchanger and gaseous state CO2Delivery pipe；
Described liquid CO2Holding vessel is provided with outlet, and described heat exchanger is provided with liquid CO2Input port and gaseous state CO2Floss hole:
Described ventilation blower is connected with heat exchanger one end by air duct, and the described heat exchanger other end passes through air duct and mining work
Face connects, described liquid CO2Holding vessel passes through liquid CO2Conveying pipe and liquid CO of heat exchanger2Input port connects, described
The gaseous state CO of heat exchanger2Floss hole passes through gaseous state CO2Delivery pipe connects with goaf；
Described liquid CO2On conveying pipe, by liquid CO2Holding vessel outlet to heat exchanger orientation be sequentially provided with the first Pressure gauge and
First valve, described gaseous state CO2On delivery pipe, by gaseous state CO2Floss hole be sequentially provided with to the direction in goaf the second valve and
Second Pressure gauge.
High temperature getting working face liquid CO the most according to claim 12Freezing by change of state heat sink, it is characterised in that described
Heat exchanger include that cooling coil and housing, described cooling coil are arranged in housing, cooling coil one end pass through liquid CO2
Input port and liquid CO2Conveying pipe connects, and the cooling coil other end passes through gaseous state CO2Floss hole and gaseous state CO2Delivery pipe connects.
High temperature getting working face liquid CO the most according to claim 22Freezing by change of state heat sink, it is characterised in that described
Cooling coil arrange according to the mode of serpentine coil, pipeline external form is star-like heat exchange fin.
High temperature getting working face liquid CO the most according to claim 12Freezing by change of state heat sink, it is characterised in that described
High temperature getting working face liquid CO2Freezing by change of state heat sink is arranged in tunnel, wherein, described ventilation blower be installed in into
Air way road, described air duct and heat exchanger are all hung in back, described liquid CO by hook2Conveying pipe is laid on lane
Road wall.
High temperature getting working face liquid CO the most according to claim 12Freezing by change of state heat sink, it is characterised in that described
Ventilation blower be booster.
High temperature getting working face liquid CO the most according to claim 12Freezing by change of state heat sink, it is characterised in that described
Liquid CO2Conveying pipe is in series by some unit conveying pipe, is connected by ring flange, ring flange between each unit conveying pipe
Seam is equipped with packing ring.
High temperature getting working face liquid CO the most according to claim 12Freezing by change of state heat sink, it is characterised in that described
Gaseous state CO2Delivery pipe is in series by some unit delivery pipes, is connected by snap joint between each unit delivery pipe.
High temperature getting working face liquid CO the most according to claim 12Freezing by change of state heat sink, it is characterised in that described
Liquid CO2Conveying outer tube layer is provided with heat-insulation layer.
High temperature getting working face liquid CO the most according to claim 12Freezing by change of state heat sink, it is characterised in that described
Liquid CO2Conveying pipe compressive resistance is not higher than-57 DEG C at more than 5MP, heatproof lower limit.
10. use high temperature getting working face liquid CO described in claim 12Freezing by change of state heat sink carries out the method lowered the temperature,
It is characterized in that, the method comprises the following steps:
Step 1: start ventilation blower, distinguished and admirable by air duct, it is delivered to getting working face through heat exchanger；
Step 2: open the first valve, liquid CO2By liquid CO2Conveying pipe flow to the cooling coil of heat exchanger, meanwhile, logical
Cross the first Pressure gauge monitoring liquid CO2Holding vessel outlet pressure value, when liquid CO2The force value in holding vessel exit is less than
During 0.52MPa, change liquid CO2Holding vessel；
Step 3: flow through the distinguished and admirable of heat exchanger, with liquid CO of cooling coil2Carry out heat exchange cooling, form cooling airflow, cool down wind
Stream is transported to getting working face by air duct, it is achieved getting working face is lowered the temperature；
Step 4: liquid CO in cooling coil2Through undergoing phase transition after distinguished and admirable heat exchange, by liquid CO2It is changed into gaseous state CO2, and
Through gaseous state CO2Delivery pipe is delivered to goaf.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610718437.8A CN106150539A (en) | 2016-08-25 | 2016-08-25 | A kind of high temperature getting working face liquid CO2freezing by change of state heat sink and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610718437.8A CN106150539A (en) | 2016-08-25 | 2016-08-25 | A kind of high temperature getting working face liquid CO2freezing by change of state heat sink and method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640174A (en) * | 2017-03-13 | 2017-05-10 | 申隆安全科技（吉林）有限公司 | Device for cooling excavation working face of high-temperature mine through liquid CO2 and method |
| CN107905830A (en) * | 2017-12-06 | 2018-04-13 | 西安科技大学 | With liquid CO in a kind of mine2Refrigeration cooling device and method |
| CN108049907A (en) * | 2017-12-06 | 2018-05-18 | 西安科技大学 | With liquid CO in a kind of mine2Refrigeration fire extinguishing integral system and method |
| CN109028754A (en) * | 2018-05-24 | 2018-12-18 | 山东科技大学 | For underground fire extinguishing/cooling liquid CO2Real-time preparation system and application method |
| CN110566277A (en) * | 2019-09-20 | 2019-12-13 | 中南大学 | device and method suitable for utilizing return air waste heat in high and cold mine |
| CN110921239A (en) * | 2019-12-17 | 2020-03-27 | 辽宁工程技术大学 | Belt feeder head liquid carbon dioxide cooling system |
| WO2020077967A1 (en) * | 2018-10-15 | 2020-04-23 | 中国矿业大学 | Multilevel deep well cooling and geothermal utilization system and process |
| CN111140277A (en) * | 2020-01-02 | 2020-05-12 | 辽宁工程技术大学 | Belt feeder head liquid carbon dioxide cooling system |
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