CN115388328B - Underground coal mine CO burying 2 Energy-saving gasification device and method - Google Patents
Underground coal mine CO burying 2 Energy-saving gasification device and method Download PDFInfo
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- CN115388328B CN115388328B CN202210986115.7A CN202210986115A CN115388328B CN 115388328 B CN115388328 B CN 115388328B CN 202210986115 A CN202210986115 A CN 202210986115A CN 115388328 B CN115388328 B CN 115388328B
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- 239000003245 coal Substances 0.000 title claims abstract description 70
- 238000002309 gasification Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 72
- 238000009825 accumulation Methods 0.000 claims abstract description 71
- 238000005065 mining Methods 0.000 claims abstract description 34
- 238000005057 refrigeration Methods 0.000 claims abstract description 29
- 238000010521 absorption reaction Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 5
- 238000007710 freezing Methods 0.000 claims description 4
- 230000008014 freezing Effects 0.000 claims description 4
- 230000009919 sequestration Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 235000011089 carbon dioxide Nutrition 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
- F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
- F17C9/04—Recovery of thermal energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/005—Pipe-line systems for a two-phase gas-liquid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/082—Pipe-line systems for liquids or viscous products for cold fluids, e.g. liquefied gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0472—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being helically or spirally coiled
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/013—Carbone dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
- F17C2227/0309—Heat exchange with the fluid by heating using another fluid
- F17C2227/0323—Heat exchange with the fluid by heating using another fluid in a closed loop
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0367—Localisation of heat exchange
- F17C2227/0388—Localisation of heat exchange separate
- F17C2227/039—Localisation of heat exchange separate on the pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/0631—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/031—Dealing with losses due to heat transfer
- F17C2260/032—Avoiding freezing or defrosting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/046—Enhancing energy recovery
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0142—Applications for fluid transport or storage placed underground
- F17C2270/0144—Type of cavity
- F17C2270/0149—Type of cavity by digging cavities
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Carbon And Carbon Compounds (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention belongs to the technical field of low-carbon energy-saving equipment for coal mine operation, and relates to a method for burying CO underground in a coal mine 2 The gasification energy-saving device comprises a cold accumulation pool, a refrigeration circulating liquid heat exchange spiral coil, a refrigeration liquid circulating pipeline, a circulating pump, a telescopic air cylinder and CO 2 A pipeline, a pressure reducing valve and a cold accumulation auxiliary pool; a refrigeration cycle liquid heat exchange spiral coil is arranged in the cold accumulation pool and is communicated with a refrigeration cycle liquid pipeline; the cold accumulation pool is communicated with the cold accumulation auxiliary pool through a circulating pump; a first heat exchange branch spiral coil is arranged in the cold accumulation auxiliary tank, and the output end of the first heat exchange branch spiral coil passes through CO 2 The pipeline is connected in series with more than two telescopic air cylinders and communicated with CO 2 A pressure reducing valve is arranged on the pipeline; the device is realized by mixing liquid CO 2 The depressurization and heat absorption gasification process is divided into a plurality of stages through a pressure reducing valve, and the effects of cold energy storage, utilization, direct cooling of a mining face and the like are achieved through the reinforced convection heat exchange of the spiral coil pipe, so that the liquid CO is realized 2 An integrated technology of energy-saving gasification and coal mine thermal disaster treatment.
Description
Technical field:
the invention belongs to the technical field of low-carbon energy-saving equipment for coal mine operation, and relates to a method for utilizing the low-carbon energy-saving equipment in underground coal mine exploitationThe heat energy stored in the coal mine injects liquid low-temperature CO into the ground 2 Conversion to gaseous CO 2 In particular to a device and a process for burying CO underground in coal mine 2 Is a gasification energy-saving device and a gasification energy-saving method; not only solve the problem of consuming electric energy to liquid CO 2 The energy-saving problem of heating up, has overcome the colliery and extracted the heat disaster problem again.
The background technology is as follows:
in the prior art, chinese patent publication No. CN102297545A discloses a CO 2 The buried heating system comprises a buried pipe heat exchange device and a heat pump heating device, wherein the buried pipe heat exchange device is used for enabling a circulating medium to absorb heat from soil; the heat pump heating device is used for absorbing heat from a circulating medium or air and improving the temperature of a heat pump working medium through heat pump circulation; the buried pipe heat exchange device comprises a buried pipe heat exchanger, a circulating medium pump and an evaporator, wherein an outlet of the buried pipe heat exchanger is connected to an inlet of the evaporator through the circulating medium pump, and an outlet of the evaporator is connected with an inlet of the buried pipe heat exchanger. The Chinese patent with publication number of CN109372567B discloses a cooling system and a method in a construction tunnel, wherein the cooling system comprises a circulating refrigeration unit, a heat exchange unit and an early warning unit, the circulating refrigeration unit comprises a circulating power device and a circulating pipeline, the circulating pipeline is internally provided with a refrigerant, and the circulating power device provides power for the refrigerant to circulate in the pipeline; the heat exchange unit comprises a heat conduction pipe connected with the circulating pipeline and a ventilation fan arranged at the periphery of the cooling system, a fan is arranged around the heat conduction pipe, and a three-dimensional vector nozzle capable of changing the conveying direction of cold air is arranged at an air outlet of the fan, so that the cold air generated around the heat conduction pipe is conveyed to a specified direction; the early warning system comprises a sensor, wherein the sensor is arranged on the outer side of the circulating pipeline, detects the concentration of the refrigerant, considers that the refrigerant leaks when the concentration of the refrigerant exceeds a set value, and gives an alarm.
At present, CO is buried in coal mines 2 Mainly using CO 2 Tank truck delivering liquid CO from ground 2 To underground coal mine, liquid CO 2 In the gasification process, low-temperature liquid CO 2 Volume expansion 500The heat is absorbed by more than two times, and then the low temperature of minus 78.5 ℃ is generated, and dry ice is formed to block the conveying pipeline. The common practice is to realize low-temperature liquid CO by means of ground heat exchange and heating 2 But consume a large amount of electric energy, indirectly increases CO 2 Is arranged in the air. In addition, as the depth of coal mining increases, the thermal disasters of the coal mine become more serious, and the temperature reduction of the coal mine, particularly the mining face, becomes a great difficulty. Therefore, how to prevent and control coal mine thermal disasters and CO 2 The combination of gasification and heat absorption is a key technology which needs to be solved urgently at present.
The invention comprises the following steps:
the invention aims to overcome the defects existing in the prior art and aims to embed CO in the prior coal mine 2 The gasification method has the defects of high energy consumption and the problem of coal mine thermal disaster caused by the fact that heat energy cannot be utilized in coal mining, and under the premise of ensuring energy conservation and environmental protection, the underground coal mine CO is designed to be buried 2 Is an energy-saving gasification device and method.
In order to achieve the aim, the invention relates to a coal mine underground CO burying method 2 The gasification energy-saving device comprises a main body structure of a cold accumulation pool, a refrigeration cycle liquid heat exchange spiral coil, a refrigeration liquid circulation pipeline, a circulation pump, a telescopic air duct and CO 2 A pipeline, a pressure reducing valve and a cold accumulation auxiliary pool; the refrigerating cycle liquid heat exchange spiral coil is arranged in the cold accumulation pool, the input end of the refrigerating cycle liquid heat exchange spiral coil is positioned at the bottom of the cold accumulation pool, refrigerating cycle liquid is filled in the refrigerating cycle liquid heat exchange spiral coil, and the input port and the output port of the refrigerating cycle liquid heat exchange spiral coil are respectively communicated with a refrigerating cycle liquid pipeline; the solution in the cold accumulation pool is communicated with the cold accumulation auxiliary pool through a circulating pump to realize the circulation of cold energy in the pool; the cold accumulation auxiliary pool is internally provided with a first heat exchange branch spiral coil, and the input end of the first heat exchange branch spiral coil is positioned at the lower end of the cold accumulation auxiliary pool; the input end of the first heat exchange branch spiral coil pipe passes through CO 2 Pipeline and liquid CO 2 The conveying device is communicated, and the output end of the first heat exchange branch spiral coil pipe is communicated with the conveying device through CO 2 The pipeline is connected in series with more than two telescopic air cylinders, a second heat exchange branch spiral coil is arranged in the telescopic air cylinders, and CO is communicated with the telescopic air cylinders 2 The pipeline is communicated with the second heat exchange branch spiral coil; the input end of the second heat exchange branch spiral coil is positioned at the lower end of the telescopic air duct, the lower end of the telescopic air duct is provided with a blower, and the blower strengthens convection heat transfer through blowing to realize CO in the second heat exchange branch spiral coil 2 Is gasified by heat absorption, and gasified CO 2 From CO at the back end of the plant 2 Outputting a pipeline; CO with input and output ends of first heat exchange branch spiral coil and input and output ends of second heat exchange branch spiral coil respectively connected 2 A pressure reducing valve is arranged on the pipeline and can control the pipeline throttling pressure difference so as to control CO 2 In CO 2 Expansion coefficients and fluid temperatures at different positions in the pipeline to finally realize liquid CO 2 Gentle gasification.
The cold accumulation tank is filled with glycol solution with mass fraction of 60% and freezing point of-48 ℃ and is CO 2 Gasification provides the required heat while storing cold energy; the refrigeration cycle liquid can conduct the cold energy stored in the cold accumulation pool to the underground coal mine high temperature area through the refrigeration cycle liquid pipeline to carry out local cooling.
The lower end of the cold accumulation pool is communicated with the lower end of the cold accumulation auxiliary pool through a circulating pump at the lower side, and solution is pumped into the cold accumulation auxiliary pool from the lower end of the cold accumulation pool; the upper end of the cold accumulation pool is communicated with the upper end of the cold accumulation auxiliary pool through a circulating pump at the upper side, and solution is pumped into the upper end of the cold accumulation pool from the upper end of the cold accumulation auxiliary pool.
CO at the rear side of the output end of the pressure reducing valve 2 The pipeline is provided with a temperature and pressure integrated sensor which is used for monitoring CO 2 Temperature and pressure at different locations in the pipe; outputting gaseous CO 2 CO of (c) 2 The pipeline is provided with a mass flowmeter which is used for monitoring CO 2 Is positioned at CO 2 The front side of the input end of the pressure reducing valve on the pipeline; outputting gaseous CO 2 CO of (c) 2 The back side of the output end of the pipeline is provided with a stop valve which is used for controlling CO in the pipeline 2 Is provided.
The circulating pump, the blower, the temperature and pressure integrated sensor, the mass flowmeter, the pressure reducing valve and the stop valve are connected and controlled to be driven in a wired or infinite mode through the control console.
The invention relates to underground coal mine CO burying 2 The gasification energy-saving device is installed in a coal mine and comprises the following specific structures: a cold accumulation pool and a cold accumulation auxiliary pool are arranged in surrounding rocks of a coal mine area, and refrigeration cycle liquid pipelines communicated with a refrigeration cycle liquid heat exchange spiral coil are distributed in a high-temperature area of an underground coal mine; the coal seam is provided with an air inlet channel and an air return channel, telescopic air cylinders are respectively arranged in the air inlet channel and the air return channel, the upper ends of the air inlet channel and the air return channel are respectively communicated with a goaf where a mining machine of a coal mining area is located, and the air inlet channel and the air return channel are respectively communicated with an air pipeline; delivery of gaseous CO at the tail end of a plant 2 CO of (c) 2 Pipeline communication to CO 2 A buried site; the telescopic air duct absorbs heat and cools air, so that the temperature of the mining face and the mining area where the mining machine is located is lowered.
The invention relates to underground coal mine CO burying 2 Realizes liquid CO by the gasification energy-saving device 2 Method of gasification comprising plant start-up, liquid CO 2 Input, CO 2 Gasification step-by-step regulation, mining face temperature regulation and CO 2 Burying; the method comprises the following specific steps:
(1) The equipment is started, and the CO is buried underground in the coal mine 2 After the gasification energy-saving device is installed in a coal mine, a circulating pump and a blower are started to enable the refrigeration circulating liquid in the refrigeration circulating liquid heat exchange spiral coil and the air in the coal mine well to be in a flowing state;
(2) Liquid CO 2 Input: opening a stop valve, and filling liquid CO on the ground 2 CO under the driving pressure of the tank truck 2 CO in a pipeline 2 Starting the flow;
(3)CO 2 gasifying and regulating step by step: regulating CO at each position 2 Pressure reducing valve on pipeline to change CO 2 At a rate of temperature rise of CO 2 The temperature before being input into the first heat exchange spiral coil is controlled between-10 ℃ and-30 ℃, and then CO is led to be discharged 2 The temperature before being input into the second heat exchange branch spiral coil in the air inlet lane is controlled between minus 10 ℃ and 10 ℃, and then CO is led to be discharged 2 The temperature before the second heat exchange branch spiral coil is input into the return air lane is controlled at-Monitoring CO at each position after the pressure reducing valve is opened by a temperature and pressure integrated sensor at the temperature of between 10 and 5 DEG C 2 CO in a pipeline 2 Is used to monitor CO by mass flowmeter 2 Is provided;
(4) Temperature regulation of the mining face: the air speed of the air blower is regulated to control the temperature of the mining face within the range of 10 ℃ to 25 ℃;
(5)CO 2 burying: CO after heating, depressurization and gasification 2 CO along the back end of the device 2 Pipeline is injected into goaf and other CO after coal mining 2 And burying the place.
Compared with the prior art, the invention designs the underground CO burying device for the coal mine 2 The gasification energy-saving device and the gasification energy-saving method have reasonable main body structure and are used for converting liquid CO 2 The depressurization and heat absorption gasification process is divided into a plurality of stages through a pressure reducing valve, and the enhanced convection heat exchange of the spiral coil pipe respectively and simultaneously satisfies the CO in the modes of cold energy storage, utilization and direct cooling of the mining face 2 The requirements of depressurization and heat absorption and coal mine thermal disaster cooling treatment are met, and the liquid CO is realized 2 Is beneficial to CO by an integrated technology of energy-saving green gasification and coal mine thermal disaster treatment 2 Development of utilization and burying technology.
Description of the drawings:
FIG. 1 is a schematic diagram of a coal mine underground CO sequestration system in accordance with the present invention 2 Is a schematic block diagram of the structure of the gasification energy-saving device.
The specific embodiment is as follows:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Example 1:
the embodiment relates to a coal mine underground CO burying method 2 As shown in fig. 1, the main structure of the gasification energy-saving device comprises a cold accumulation pool 8, a refrigeration cycle liquid heat exchange spiral coil 9, a refrigeration cycle liquid circulation pipeline 10, a circulation pump 11 and CO 2 Heat exchanging branch spiral coil, telescopic air duct 13, blower 14 and CO 2 A pipeline 15, a temperature and pressure integrated sensor 16, a mass flowmeter 17, a pressure reducing valve 18, a stop valve 19 and a cold accumulation auxiliary pool 20; wherein the mass fraction of the cold accumulation pool 8 filled with freezing point-48 ℃ is 60%Glycol solution, and the cold accumulation tank 8 is CO 2 Gasification provides the required heat while storing cold energy; the refrigerating cycle liquid heat exchange spiral coil 9 is arranged in the cold accumulation pool 8, the input end of the refrigerating cycle liquid heat exchange spiral coil 9 is positioned at the bottom of the cold accumulation pool 8, refrigerating cycle liquid is filled in the refrigerating cycle liquid heat exchange spiral coil 9, the input and output ports of the refrigerating cycle liquid heat exchange spiral coil 9 are respectively communicated with the refrigerating cycle liquid pipeline 10, and the refrigerating cycle liquid can conduct cold energy stored in the cold accumulation pool 8 to a coal mine high temperature area in the pit through the refrigerating cycle liquid pipeline 10 for local cooling; the solution in the cold accumulation pool 8 is communicated with the cold accumulation auxiliary pool 20 through the circulating pump 11 to realize the pool internal circulation of cold energy; the lower end of the cold accumulation pool 8 is communicated with the lower end of the cold accumulation auxiliary pool 20 through a circulating pump 11 at the lower side, and solution is pumped into the cold accumulation auxiliary pool 20 from the lower end of the cold accumulation pool 8; the upper end of the cold accumulation pool 8 is communicated with the upper end of the cold accumulation auxiliary pool 20 through a circulating pump 11 at the upper side, and solution is pumped into the upper end of the cold accumulation pool 8 from the upper end of the cold accumulation auxiliary pool 20; the first heat exchange branch spiral coil 12-1 is arranged in the cold accumulation auxiliary pool 20, and the input end of the first heat exchange branch spiral coil 12-1 is positioned at the lower end of the cold accumulation auxiliary pool 20, so that the high-efficiency heat exchange between the cold accumulation pool 8 and the cold accumulation auxiliary pool 20 is ensured; the input end of the first heat exchange branch spiral coil 12-1 passes through CO 2 Conduit 15 and liquid CO 2 The conveying device is communicated, and the output end of the first heat exchange branched spiral coil 12-1 passes through CO 2 The pipeline 15 is connected in series with more than two telescopic air cylinders 13, the telescopic air cylinders 13 are internally provided with second heat exchange branch spiral coils 12-2, and CO communicated with the telescopic air cylinders 13 2 The pipeline 15 is communicated with the second heat exchange branch spiral coil 12-2, the input end of the second heat exchange branch spiral coil 12-2 is positioned at the lower end of the telescopic air duct 13, the lower end of the telescopic air duct 13 is provided with the blower 14, and the blower 14 strengthens convection heat transfer through blowing to realize CO in the second heat exchange branch spiral coil 12-2 2 Is gasified by heat absorption, and gasified CO 2 From CO at the back end of the plant 2 The pipeline 15 outputs; CO with input and output ends of first heat exchange branch spiral coil 12-1 and input and output ends of second heat exchange branch spiral coil 12-2 respectively connected 2 A pressure reducing valve 18 is arranged on the pipeline 15, and the pressure reducing valve 18 can control the pipeline throttling pressure difference so as to control CO 2 In CO 2 Expansion coefficient and fluid at different locations in the pipeline 15A temperature; at the rear side of the output end of the pressure reducing valve 18, CO 2 The pipeline 15 is provided with a temperature and pressure integrated sensor 16, and the temperature and pressure integrated sensor 16 is used for monitoring CO 2 The temperature and pressure at different locations in the pipe 15; outputting gaseous CO 2 CO of (c) 2 The pipeline 15 is provided with a mass flowmeter 17, and the mass flowmeter 17 is used for monitoring CO 2 The mass flowmeter 17 is located at the outflow rate of CO 2 The front side of the input end of the pressure reducing valve 18 on the pipeline 15; outputting gaseous CO 2 CO of (c) 2 The back side of the output end of the pipeline 15 is provided with a stop valve 19, and the stop valve 19 is used for controlling CO in the pipeline 2 Is provided.
The circulation pump 11, the blower 14, the temperature and pressure integrated sensor 16, the mass flowmeter 17, the pressure reducing valve 18, and the shutoff valve 19 according to the present embodiment are controlled and driven by wired or endless connection through a console, respectively.
Example 2:
the embodiment uses the coal mine underground CO burying method of the embodiment 1 2 As shown in fig. 1, the specific structure of the gasification energy-saving device installed in the coal mine is as follows: a cold accumulation pool 8 and a cold accumulation auxiliary pool 20 are arranged in a surrounding rock 1 of a coal mine area, and a refrigeration cycle fluid pipeline 10 communicated with a refrigeration cycle fluid heat exchange spiral coil 9 is distributed in a high-temperature area of an underground coal mine; an air inlet lane 3 and an air return lane 7 are formed in the coal seam 2, telescopic air cylinders 13 are respectively arranged in the air inlet lane 3 and the air return lane 7, the upper ends of the air inlet lane 3 and the air return lane 7 are respectively communicated with a goaf 5 where a mining machine 4 of a coal mining area is located, and the air inlet lane 3 and the air return lane 7 are respectively communicated with an air pipeline; delivery of gaseous CO at the tail end of a plant 2 CO of (c) 2 Conduit 15 communicates to the CO 2 And burying the place. The heat absorption and the temperature reduction of the air are realized through the telescopic air duct 13, so that the temperature reduction of the mining face 6 and the mining area where the mining machine 4 is positioned is realized.
The embodiment uses the coal mine underground CO burying method of the embodiment 1 2 Realizes liquid CO by the gasification energy-saving device 2 Method of gasification comprising plant start-up, liquid CO 2 Input, CO 2 Gasification step-by-step regulation, mining face temperature regulation and CO 2 Burying; the method comprises the following specific steps:
(1) The equipment is started, the coalUnderground CO burying 2 After the gasification energy-saving device is installed in a coal mine, a circulating pump 11 and a blower 14 are turned on to enable the refrigeration circulating liquid in the refrigeration circulating liquid heat exchange spiral coil 9 and the air in the coal mine to be in a flowing state;
(2) Liquid CO 2 Input: the stop valve 19 is opened, and liquid CO is filled on the ground 2 CO under the driving pressure of the tank truck 2 CO in line 15 2 Starting the flow;
(3)CO 2 gasifying and regulating step by step: regulating CO at each position 2 Pressure reducing valve 18 on line 15 changes CO 2 At a rate of temperature rise of CO 2 The temperature before being input into the first heat exchange spiral coil 12-1 is controlled between-10 ℃ and-30 ℃, and then CO is led to be discharged 2 The temperature before being input into the second heat exchange spiral coil 12-2 in the air inlet lane 3 is controlled between minus 10 ℃ and 10 ℃, and then CO is caused to be generated 2 The temperature before the second heat exchange branch spiral coil 12-2 is input into the return airway 7 is controlled between minus 10 ℃ and 5 ℃, and the temperature and pressure integrated sensor 16 is used for monitoring the CO of each part after the pressure reducing valve 18 is opened 2 CO in line 15 2 Is used to monitor the CO by a mass flowmeter 17 2 Is provided;
(4) Temperature regulation of the mining face: the air speed of the air blower 14 is regulated to control the temperature of the mining face 6 within the range of 10 ℃ to 25 ℃;
(5)CO 2 burying: CO after heating, depressurization and gasification 2 CO along the back end of the device 2 The pipeline 15 is injected into the goaf 5 and other CO after the coal mining is finished 2 And burying the place.
The embodiment describes underground coal mine CO burying 2 Realizes liquid CO by the gasification energy-saving device 2 The gasification method has the working principle that:
liquid CO 2 Pressure reduction and CO during depressurization and gasification 2 The heat absorption capacity is positively correlated, so that the pressure difference and the CO per section can be controlled by throttling through the pressure reducing valve 18 2 Minimum temperature and heat absorption capacity of the conduit 15. CO 2 After throttling and cooling by the pressure reducing valve 18, the cooled CO 2 Through the first heat exchange spiral coil 12-1 or the second heat exchange spiral coil 12-2Convection heat absorption, CO in pipeline 2 Thereby increasing the minimum temperature of the pipeline downstream of the throttling of the next pressure reducing valve 18, avoiding CO 2 And (3) forming dry ice in the pipeline. CO 2 The gasification heat absorption quantity of the coal mine is derived from ethylene glycol solution with mass fraction of 60% at the freezing point of minus 48 ℃ in the cold accumulation pool 8 and heat energy released by the mining face 6, one part of cold energy is stored in the cold accumulation pool 8 as a standby refrigeration source, and the other part is used for directly cooling the mining face 6, so that the control of the coal mine thermal disasters and the control of CO are realized 2 The gasification and heat absorption integrated method fully utilizes the heat energy in the coal mine, is green and low-carbon, does not need to consume excessive electric energy additionally and prevents CO 2 And the formation of the dry ice of the gasification pipeline is energy-saving and environment-friendly.
Claims (6)
1. Underground coal mine CO burying 2 Is characterized in that: comprises a cold accumulation pool, a refrigeration cycle liquid heat exchange spiral coil, a refrigeration liquid circulation pipeline, a circulation pump, a telescopic air duct and CO 2 A pipeline, a pressure reducing valve and a cold accumulation auxiliary pool; the refrigerating cycle liquid heat exchange spiral coil is arranged in the cold accumulation pool, the input end of the refrigerating cycle liquid heat exchange spiral coil is positioned at the bottom of the cold accumulation pool, refrigerating cycle liquid is filled in the refrigerating cycle liquid heat exchange spiral coil, and the input port and the output port of the refrigerating cycle liquid heat exchange spiral coil are respectively communicated with a refrigerating cycle liquid pipeline; the cold accumulation pool is communicated with the cold accumulation auxiliary pool through a circulating pump to realize the in-pool circulation of cold energy; the cold accumulation auxiliary pool is internally provided with a first heat exchange branch spiral coil, and the input end of the first heat exchange branch spiral coil is positioned at the lower end of the cold accumulation auxiliary pool; the input end of the first heat exchange branch spiral coil pipe passes through CO 2 Pipeline and liquid CO 2 The conveying device is communicated, and the output end of the first heat exchange branch spiral coil pipe is communicated with the conveying device through CO 2 The pipeline is connected in series with more than two telescopic air cylinders, a second heat exchange branch spiral coil is arranged in the telescopic air cylinders, and CO is communicated with the telescopic air cylinders 2 The pipeline is communicated with the second heat exchange branch spiral coil; the input end of the second heat exchange branch spiral coil is positioned at the lower end of the telescopic air duct, the lower end of the telescopic air duct is provided with a blower, and the blower strengthens convection heat transfer through blowing to realize CO in the second heat exchange branch spiral coil 2 Is (are) heat absorption ofGasified and gasified CO 2 From CO at the back end of the plant 2 Outputting a pipeline; CO with input and output ends of first heat exchange branch spiral coil and input and output ends of second heat exchange branch spiral coil respectively connected 2 A pressure reducing valve is arranged on the pipeline and can control the pipeline throttling pressure difference so as to control CO 2 In CO 2 Expansion coefficients and fluid temperatures at different locations in the pipeline;
the underground coal mine buries CO 2 The gasification energy-saving device is installed in a coal mine and comprises the following specific structures: a cold accumulation pool and a cold accumulation auxiliary pool are arranged in surrounding rocks of a coal mine area, and refrigeration cycle liquid pipelines communicated with a refrigeration cycle liquid heat exchange spiral coil are distributed in a high-temperature area of an underground coal mine; the coal seam is provided with an air inlet channel and an air return channel, telescopic air cylinders are respectively arranged in the air inlet channel and the air return channel, the upper ends of the air inlet channel and the air return channel are respectively communicated with a goaf where a mining machine of a coal mining area is located, and the air inlet channel and the air return channel are respectively communicated with an air pipeline; delivery of gaseous CO at the tail end of a plant 2 CO of (c) 2 Pipeline communication to CO 2 A buried site; the telescopic air duct absorbs heat and cools air, so that the temperature of the mining face and the mining area where the mining machine is located is lowered.
2. A coal mine downhole CO sequestration according to claim 1 2 Is characterized in that: the cold accumulation tank is filled with glycol solution with mass fraction of 60% at freezing point of-48 ℃ and is CO 2 Gasification provides the required heat while storing cold energy; the refrigeration cycle liquid can conduct the cold energy stored in the cold accumulation pool to the underground coal mine high temperature area through the refrigeration cycle liquid pipeline to carry out local cooling.
3. A coal mine downhole CO sequestration according to claim 2 2 Is characterized in that: the lower end of the cold accumulation pool is communicated with the lower end of the cold accumulation auxiliary pool through a circulating pump at the lower side, and solution is pumped into the cold accumulation auxiliary pool from the lower end of the cold accumulation pool; the upper end of the cold accumulation pool is communicated with the upper end of the cold accumulation auxiliary pool through a circulating pump at the upper side, and solution is pumped into the upper end of the cold accumulation pool from the upper end of the cold accumulation auxiliary pool.
4. A coal mine downhole CO sequestration according to claim 3 2 Is characterized in that: CO at the rear side of the output end of the pressure reducing valve 2 The pipeline is provided with a temperature and pressure integrated sensor which is used for monitoring CO 2 Temperature and pressure at different locations in the pipe; outputting gaseous CO 2 CO of (c) 2 The pipeline is provided with a mass flowmeter which is used for monitoring CO 2 Is positioned at CO 2 The front side of the input end of the pressure reducing valve on the pipeline; outputting gaseous CO 2 CO of (c) 2 The back side of the output end of the pipeline is provided with a stop valve which is used for controlling CO in the pipeline 2 Is provided.
5. The underground coal mine CO of claim 4 2 Is characterized in that: the circulating pump, the blower, the temperature and pressure integrated sensor, the mass flowmeter, the pressure reducing valve and the stop valve are connected and controlled to be driven in a wired or infinite mode through a control console.
6. The underground coal mine CO of claim 5 2 Is characterized in that: the underground coal mine buries CO 2 Realizes liquid CO by the gasification energy-saving device 2 Method of gasification comprising plant start-up, liquid CO 2 Input, CO 2 Gasification step-by-step regulation, mining face temperature regulation and CO 2 Burying; the method comprises the following specific steps:
(1) The equipment is started, and the CO is buried underground in the coal mine 2 After the gasification energy-saving device is installed in a coal mine, a circulating pump and a blower are started to enable the refrigeration circulating liquid in the refrigeration circulating liquid heat exchange spiral coil and the air in the coal mine well to be in a flowing state;
(2) Liquid CO 2 Input: opening a stop valve, and filling liquid CO on the ground 2 CO under the driving pressure of the tank truck 2 CO in a pipeline 2 Starting the flow;
（3）CO 2 step-by-step regulation and control of gasification: regulating CO at each position 2 Pressure reducing valve on pipeline to change CO 2 At a rate of temperature rise of CO 2 The temperature before being input into the first heat exchange spiral coil is controlled between-10 ℃ and-30 ℃, and then CO is led to be discharged 2 The temperature before being input into the second heat exchange branch spiral coil in the air inlet lane is controlled between minus 10 ℃ and 10 ℃, and then CO is led to be discharged 2 The temperature before the second heat exchange branch spiral coil is input into the return airway is controlled between minus 10 ℃ and 5 ℃, and the CO of each part after the pressure reducing valve is opened is monitored by a temperature and pressure integrated sensor 2 CO in a pipeline 2 Is used to monitor CO by mass flowmeter 2 Is provided;
(4) Temperature regulation of the mining face: the air speed of the air blower is regulated to control the temperature of the mining face within the range of 10 ℃ to 25 ℃;
（5）CO 2 burying: CO after heating, depressurization and gasification 2 CO along the back end of the device 2 Pipeline is injected into goaf and other CO after coal mining 2 And burying the place.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012062999A (en) * | 2010-09-17 | 2012-03-29 | Chugoku Electric Power Co Inc:The | Lng vaporization equipment |
| CN103017434A (en) * | 2012-12-29 | 2013-04-03 | 天津华迈燃气装备股份有限公司 | Cold accumulation device matched with LNG vaporizing heat-exchange system |
| CN103954091A (en) * | 2014-04-10 | 2014-07-30 | 天津城建大学 | Refrigeratory refrigeration system capable of fully utilizing cold energy of liquefied natural gas |
| CN209229346U (en) * | 2018-11-21 | 2019-08-09 | 南京亿碳科技有限公司 | Liquid CO 2 vaporization and gaseous state CO2 liquefaction process energy mutually utilize the level-one energy saver of heat exchange and phase transformation |
| CN212178525U (en) * | 2020-05-08 | 2020-12-18 | 天脊煤化工集团股份有限公司 | Carbon dioxide low-temperature vaporization device |
| CN212480831U (en) * | 2020-04-21 | 2021-02-05 | 神华神东煤炭集团有限责任公司 | Liquid carbon dioxide long distance conveying system |
| CN212510491U (en) * | 2020-04-26 | 2021-02-09 | 神华神东煤炭集团有限责任公司 | Liquid carbon dioxide constant temperature gasification device for coal mine |
-
2022
- 2022-08-17 CN CN202210986115.7A patent/CN115388328B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012062999A (en) * | 2010-09-17 | 2012-03-29 | Chugoku Electric Power Co Inc:The | Lng vaporization equipment |
| CN103017434A (en) * | 2012-12-29 | 2013-04-03 | 天津华迈燃气装备股份有限公司 | Cold accumulation device matched with LNG vaporizing heat-exchange system |
| CN103954091A (en) * | 2014-04-10 | 2014-07-30 | 天津城建大学 | Refrigeratory refrigeration system capable of fully utilizing cold energy of liquefied natural gas |
| CN209229346U (en) * | 2018-11-21 | 2019-08-09 | 南京亿碳科技有限公司 | Liquid CO 2 vaporization and gaseous state CO2 liquefaction process energy mutually utilize the level-one energy saver of heat exchange and phase transformation |
| CN212480831U (en) * | 2020-04-21 | 2021-02-05 | 神华神东煤炭集团有限责任公司 | Liquid carbon dioxide long distance conveying system |
| CN212510491U (en) * | 2020-04-26 | 2021-02-09 | 神华神东煤炭集团有限责任公司 | Liquid carbon dioxide constant temperature gasification device for coal mine |
| CN212178525U (en) * | 2020-05-08 | 2020-12-18 | 天脊煤化工集团股份有限公司 | Carbon dioxide low-temperature vaporization device |
Non-Patent Citations (1)
| Title |
|---|
| 二氧化碳冷量回收节能改造;江浩;;上海节能(第05期) * |
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