CN111830233A - Goaf carbon dioxide transport and dissipation experimental device - Google Patents
Goaf carbon dioxide transport and dissipation experimental device Download PDFInfo
- Publication number
- CN111830233A CN111830233A CN202010717579.9A CN202010717579A CN111830233A CN 111830233 A CN111830233 A CN 111830233A CN 202010717579 A CN202010717579 A CN 202010717579A CN 111830233 A CN111830233 A CN 111830233A
- Authority
- CN
- China
- Prior art keywords
- data
- carbon dioxide
- goaf
- gas
- automatic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 151
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 76
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 75
- 238000012544 monitoring process Methods 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000002474 experimental method Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 238000010792 warming Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 49
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 40
- 229910052760 oxygen Inorganic materials 0.000 claims description 40
- 239000001301 oxygen Substances 0.000 claims description 40
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 41
- 238000002485 combustion reaction Methods 0.000 abstract description 17
- 230000002269 spontaneous effect Effects 0.000 abstract description 16
- 238000001179 sorption measurement Methods 0.000 abstract description 11
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 4
- 238000005065 mining Methods 0.000 abstract description 3
- 230000010412 perfusion Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 238000004088 simulation Methods 0.000 description 9
- 230000032258 transport Effects 0.000 description 8
- 239000011435 rock Substances 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000007405 data analysis Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012844 infrared spectroscopy analysis Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/004—CO or CO2
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0073—Control unit therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Combustion & Propulsion (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a goaf carbon dioxide transportation and dissipation experimental device, which belongs to the field of coal mining and comprises a gas mixer, a device body, a monitoring system and a data display system; the device body comprises a constant temperature box, a heating experiment furnace and a draw-out type exhaust fan; the heating experimental furnace is used for simulating the internal environment of the goaf, the heating experimental furnace is arranged in the constant temperature box, the extraction type exhaust fan is arranged on the outer side of the constant temperature box, and an air inlet pipeline of the extraction type exhaust fan penetrates through the constant temperature box and is communicated with the heating experimental furnace; the gas mixer is communicated with the warming experimental furnace through a gas inlet pipeline to provide mixed gas for the warming experimental furnace, and the gas inlet pipeline is provided with a one-way valve; the monitoring system comprises an automatic control system, a monitoring system, a data transmission system, a data processing system and a data output system. The device can realize the automatic monitoring and analysis of different perfusion parameters on the carbon dioxide adsorption quantity, the diffusion transport quantity, the emission quantity and the coal spontaneous combustion early warning index under the condition of goaf carbon dioxide inerting, and has strong practicability.
Description
Technical Field
The invention belongs to the field of coal mining, and particularly relates to a goaf carbon dioxide transportation and dissipation experimental device.
Background
The area where overlying strata collapse and break and the remaining coal are mixed in the middle and lower part of the goaf is an important occurrence part of coal mine disasters, the remaining coal and rock in the area are fractured by the overlying strata to form an air guide channel, the heat accumulation after the coal is oxidized and released is a main reason for causing the coal spontaneous combustion in the goaf from the cause of coal spontaneous combustion fire, and the coal spontaneous combustion relates to the generation and the transfer of heat and is a result of heat generation and heat dissipation game. According to the coal spontaneous combustion gasification theory, coal spontaneous combustion is the result of the comprehensive effects of continuously providing hot oxygen in an air flow field, oxidizing and storing heat of residual coal and accumulating heat. Under the influence of the pore characteristics of porous media, an air flow field and a temperature field in the goaf, spontaneous combustion of coal in the goaf has the characteristics of strong disaster concealment, complex flow field, high treatment difficulty and the like. Because the pores formed by the coal rock bodies in the goaf have the characteristics of nondirectivity, bendability, randomness and the like, the air flow form in the goaf comprises turbulent flow, transition flow, laminar flow and nonlinear seepage flow; according to the heat transfer theory, the leaked air is used as a medium for heat convection and is an important path for the self-combustion heat generation and transmission of coal. Therefore, the research on the spontaneous combustion heat generation and heat transfer rule of the coal in the goaf is an important theoretical basis for preventing and controlling the spontaneous combustion of the coal.
The carbon dioxide inerting goaf technology is one of goaf coal spontaneous combustion control methods, and as carbon dioxide gas has the characteristics of high inerting rate, good explosion suppression performance, high speed, low cost and the like, the carbon dioxide gas does not react with other substances in a normal state, and can quickly sink into the bottom of a fire area to replace bottom carbon dioxide, the fire area is suffocated due to oxygen deficiency, and meanwhile, as the coal has large adsorption capacity on the carbon dioxide and high desorption temperature, a better effect is obtained in mine fire prevention and control application.
However, when the carbon dioxide fire prevention and extinguishing technology is adopted, the carbon dioxide interacts with a goaf air leakage field to cause the change of an air flow field in the goaf, and in addition, the storage and flowing processes of carbon dioxide gas in the goaf are extremely complicated because the crushed coal rock body and the carbon dioxide are subjected to adsorption and heat transfer, and the temperature field of the goaf influences the physicochemical properties of the carbon dioxide.
The inhibition effect of carbon dioxide on the coal spontaneous combustion process is mainly reflected in that oxygen is absorbed and removed by the crushed coal rock mass, the coal rock mass is covered and wrapped to isolate oxygen, the oxygen concentration of the goaf is reduced, and the heat of the goaf is absorbed and conducted. The carbon dioxide gas has high density, can quickly sink to the bottom of the fire area, and the coal rock mass has high carbon dioxide gas adsorption capacity and high desorption temperature, so that the coal rock mass has important influence on the process of adsorbing oxygen at low temperature, the fire area is suffocated due to oxygen deficiency, and the process of heating the coal by oxidation is inhibited. Many scholars at home and abroad research the adsorption characteristic of the coal to the carbon dioxide by adopting adsorption, chromatographic oxygen absorption, infrared spectroscopic analysis and the like; in the aspect of influencing the carbon dioxide inerting characteristic, a great deal of experimental research is carried out on the characteristic of inhibiting the coal low-temperature oxidation by the carbon dioxide, the carbon dioxide plays roles of inerting, oxygen reduction, adsorption and oxygen inhibition on the oxidation spontaneous combustion environment of the coal, the generation of oxidation products is inhibited, and the research provides a good reference meaning for guiding the carbon dioxide to prevent and control the coal spontaneous combustion.
At present, two methods of physical similarity simulation and numerical simulation are mainly adopted for the research of a flow field of a goaf, the goaf is assumed to be a porous medium under a certain pore structure by the numerical simulation method, parameters such as porosity, internal resistance and the like of the goaf are calculated by adopting a masonry beam theory and an O-shaped ring theory according to actual geology and mining conditions of a working face, a fluid distribution calculation model of the goaf is established by combining a Navier-Stokes equation, and the flow field distribution of the goaf is calculated by utilizing a finite element gridding processing method. Most of the basic parameters are used by an empirical formula, the obtained simulation result is only an approximate solution of flow field distribution of the goaf, and the problems of poor simulation convergence, huge calculation result data volume, unchanged use and the like often exist.
The physical similarity simulation is mainly to build a stope similarity physical platform according to actual proportion, the gas flow trace is observed by means of tracer, smoke and the like in the early stage, and along with the development of monitoring technology, sensors of gas, oxygen concentration, pressure, wind speed and the like are used for monitoring data of gas concentration, pressure, flow speed and the like in a goaf. The physical simulation requires that the model is reduced, the characteristic parameters of the original structure are not changed, the design requirement on an experimental platform is high, the numerical simulation is convenient to use, and the accuracy of the key basic parameters directly influences the accuracy of a simulation result.
Therefore, the application provides a collecting space area carbon dioxide transports dissipation experimental apparatus.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a goaf carbon dioxide transportation and dissipation experimental device.
In order to achieve the above purpose, the invention provides the following technical scheme:
a goaf carbon dioxide transportation and dissipation experimental device comprises a gas mixer, a device body, a monitoring system and a data display system;
the device body comprises a constant temperature box, a heating experiment furnace and a draw-out type exhaust fan; the heating experimental furnace is used for simulating the internal environment of the goaf, the heating experimental furnace is arranged in the constant temperature box, the extraction type exhaust fan is arranged on the outer side of the constant temperature box, and an air inlet pipeline of the extraction type exhaust fan penetrates through the constant temperature box and is communicated with the heating experimental furnace;
the gas mixer is communicated with the warming experimental furnace through a gas inlet pipeline to provide mixed gas for the warming experimental furnace, a one-way valve is arranged on the gas inlet pipeline, the one-way valve is opened when the gas enters the warming experimental furnace from the gas mixer, and the one-way valve is in a relation when the gas reversely flows back;
the monitoring system comprises an automatic control system, a monitoring system, a data transmission system, a data processing system and a data output system;
the monitoring system is used for monitoring a gas concentration index and a temperature index in the goaf in real time and sending monitored data to the data transmission system;
the data transmission system is used for acquiring real-time data acquired by the monitoring system and sending the real-time data to the data processing system;
the data processing system analyzes the received data, generates decision instructions and respectively sends the decision instructions to the automatic control system, the data output system and the data display system;
the automatic control system automatically controls the flow of the gas mixer and the extraction type exhaust fan according to the received decision instruction;
the data output system sends data to the storage unit according to the received decision instruction pair;
and the data display system performs acousto-optic early warning on the parameters exceeding the initial threshold value by executing the instruction issued by the data processing system, performs graphical display on the state of the current experiment, and displays data in real time.
Preferably, the monitoring system comprises a carbon monoxide concentration sensor, an oxygen concentration sensor, a methane concentration sensor, a carbon dioxide concentration sensor, an ethylene concentration sensor, an acetylene concentration sensor, a temperature sensor and a flow sensor, and the sensors are arranged in the heating experiment furnace in a lattice manner;
the data transmission system comprises a data integrator and a data transmission cable, wherein the data integrator simultaneously acquires real-time data of various sensors according to the set sampling interval time, and sends the real-time data to the data processing system through the data transmission cable;
the data processing system comprises a monitoring host, a signal converter, a decoder and a data analyzer, and the data processing system converts and decodes the received data, analyzes the data by the data analyzer, generates a decision instruction and respectively sends the decision instruction to the automatic control system, the data output system and the data display system;
the automatic control system comprises a carbon dioxide flow automatic releaser, an oxygen automatic releaser and a controller, and the carbon dioxide flow automatic releaser, the oxygen automatic releaser and the extraction type exhaust fan are all in communication connection with the controller; the controller automatically controls the concentration of carbon dioxide and oxygen and the flow of the exhaust fan by executing the instruction issued by the data processing system;
the data display system comprises data early warning and screen display, and performs acousto-optic early warning on parameters exceeding an initial threshold value, performs graphic display on the state of the current experiment and displays data in real time by executing an instruction issued by the data processing system.
Preferably, the gas mixer comprises a mixing box and a carbon dioxide injection pipe and an oxygen injection pipe which are communicated with the mixing box, and the carbon dioxide flow automatic releaser and the oxygen automatic releaser are respectively arranged on the carbon dioxide injection pipe and the oxygen injection pipe.
Preferably, the carbon dioxide flow automatic releaser and the oxygen automatic releaser are both flow control valves.
The goaf carbon dioxide transportation and dissipation experimental device provided by the invention has the following beneficial effects:
by constructing an automatic control system, a monitoring system, a data transmission system, a data processing system and a data analysis system, the automatic monitoring and analysis of different perfusion parameters on the carbon dioxide adsorption quantity, the diffusion transportation quantity, the emission quantity and the coal spontaneous combustion early warning index under the condition of goaf carbon dioxide inerting can be realized, and the device has strong practicability and wide popularization and application values;
designing a monitoring array and multi-channel transmission and data integration analysis by utilizing a goaf coal spontaneous combustion temperature wireless monitoring technology, namely utilizing a redundant transmission technology of wireless monitoring signals under high interference;
the method can realize the measurement of the carbon dioxide injection parameters (injection amount and goaf pressure), the adsorption amount, the diffusion transport amount and the coal spontaneous combustion critical index parameters (temperature and carbon monoxide concentration).
Drawings
FIG. 1 is a schematic structural diagram of a goaf carbon dioxide transport dissipation experimental facility in embodiment 1 of the present invention;
FIG. 2 is a flow chart of a goaf carbon dioxide transport dissipation experimental method in embodiment 1 of the present invention;
fig. 3 is a flow chart of experimental data processing of the goaf carbon dioxide transport dissipation experimental method in embodiment 1 of the present invention.
Description of reference numerals:
the device comprises a carbon dioxide injection pipe 1, an oxygen injection pipe 2, an automatic oxygen releaser 3, a mixing box 4, a warming experimental furnace 5, a constant temperature box 6, a draw-out type exhaust fan 7, a monitoring system 8 and an automatic carbon dioxide flow releaser 9.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention and can practice the same, the present invention will be described in detail with reference to the accompanying drawings and specific examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In the description of the present invention, unless otherwise specified, "a plurality" means two or more, and will not be described in detail herein.
Example 1
The invention provides a goaf carbon dioxide transportation and dissipation experimental device, which is specifically shown in figure 1 and comprises a gas mixer, a device body, a monitoring system and a data display system;
the device body comprises a constant temperature box 6, a heating experiment furnace 5 and a draw-out type exhaust fan 7; the heating experimental furnace 5 is used for simulating the internal environment of the goaf, the heating experimental furnace 5 is arranged in the constant temperature box 6, the extraction type exhaust fan 7 is arranged on the outer side of the constant temperature box 6, and an air inlet pipeline of the extraction type exhaust fan 7 penetrates through the constant temperature box 6 and is communicated with the heating experimental furnace 5;
the gas mixer is communicated with the warming experimental furnace 5 through a gas inlet pipeline to provide mixed gas for the warming experimental furnace 5, a one-way valve 10 is arranged on the gas inlet pipeline, the one-way valve 10 is opened when the gas enters the warming experimental furnace 5 from the gas mixer, the one-way valve 10 is in a relation when the gas reversely flows back, and the gas flow is prevented from flowing back to the gas mixer through the one-way valve 10;
the monitoring system comprises an automatic control system, a monitoring system 8, a data transmission system, a data processing system and a data output system;
the monitoring system 8 is used for monitoring the gas concentration index and the temperature index in the goaf in real time and sending the monitored data to the data transmission system;
the data transmission system is used for acquiring real-time data acquired by the monitoring system 8 and sending the real-time data to the data processing system;
the data processing system analyzes the received data, generates decision instructions and respectively sends the decision instructions to the automatic control system, the data output system and the data display system;
the automatic control system automatically controls the flow of the gas mixer and the extraction type exhaust fan 7 according to the received decision instruction;
the data output system sends the data to the storage unit according to the received decision instruction pair;
the data display system performs acousto-optic early warning on the parameters exceeding the initial threshold value through the instruction issued by the data processing system, performs graphical display on the state of the current experiment, and displays data in real time.
Further, in this embodiment, the monitoring system 8 includes a carbon monoxide concentration sensor, an oxygen concentration sensor, a methane concentration sensor, a carbon dioxide concentration sensor, an ethylene concentration sensor, an acetylene concentration sensor, a temperature sensor, and a flow sensor, and each sensor is arranged in the temperature-rising experimental furnace 5 in a lattice manner;
the data transmission system comprises a data integrator and a data transmission cable, wherein the data integrator simultaneously acquires real-time data of various sensors according to the set sampling interval time, and sends the real-time data to the data processing system through the data transmission cable;
the data processing system comprises a monitoring host, a signal converter, a decoder and a data analyzer, and is used for converting and decoding the received data, analyzing the data by the data analyzer, generating a decision instruction and respectively sending the decision instruction to the automatic control system, the data output system and the data display system;
the automatic control system comprises a carbon dioxide flow automatic releaser 9, an oxygen automatic releaser 3 and a controller, wherein the carbon dioxide flow automatic releaser 9, the oxygen automatic releaser 3 and the extraction type exhaust fan 7 are all in communication connection with the controller; the controller automatically controls the concentration of carbon dioxide and oxygen and the flow of the exhaust fan by executing instructions issued by the data processing system; the data display system comprises data early warning and screen display, performs acousto-optic early warning on the parameters exceeding the initial threshold value through the instruction issued by the data processing system, performs graphical display on the state of the current experiment, and displays data in real time.
For precise control of the amount of intake air, in the present embodiment, the gas mixer includes a mixing box 4 and a carbon dioxide injection pipe 1 and an oxygen injection pipe 2 communicating with the mixing box 4, and a carbon dioxide flow rate automatic releaser 9 and an oxygen automatic releaser 3 are provided on the carbon dioxide injection pipe 1 and the oxygen injection pipe 2, respectively. The coal sample needs to be manufactured according to the requirement of the porosity and the particle size, the monitoring sensor is completely covered by the coal sample, gas is controlled by the automatic carbon dioxide flow releaser 9 and the automatic oxygen releaser 3, the carbon dioxide gas enters the mixing box 4 through the carbon dioxide injection pipe 1 and the oxygen injection pipe 2 respectively, the carbon dioxide gas is conveyed into the warming experiment furnace 5 through a pipeline after reaching the set concentration, and the kinetic energy of gas flow is provided by the extraction type exhaust fan 7.
Specifically, in the present embodiment, the carbon dioxide flow automatic releaser 9 and the oxygen automatic releaser 3 are both flow control valves.
Another objective of this embodiment is to provide a goaf carbon dioxide transport dissipation experimental method, which mainly analyzes CO2Degree of adsorption with coal in crushed coal (gob, warming furnace), and analysis of external gas (O)2) As for the influence of the gas distribution law in the whole space, as shown in fig. 2 and 3, the method comprises the following steps:
step 1, preparing an experiment; adding a coal sample into the heating experimental furnace 5, and opening a monitoring system and a data display system;
step 2, setting initial parameters of an experiment; selecting a parameter regulation and control mode of the experimental device, wherein the regulation and control mode of the experimental device is divided into flow regulation and control or pressure regulation and control, and the flow regulation and control mode mainly analyzes the influence of the concentration of carbon dioxide on transportation and dissipation by regulating and controlling the injection amount of carbon dioxide; the pressure regulation and control mode mainly analyzes the influence of the environmental pressure on the carbon dioxide transportation and dissipation by regulating and controlling the negative pressure of the exhaust fan and sends an instruction for displaying the current state;
step 3, opening a constant temperature box 6 to control the temperature to be in an experimental set working condition;
step 4, opening the carbon dioxide flow automatic releaser 9, the oxygen automatic releaser 3 and the exhaust fan 7;
step 5, analyzing an experimental state; judging whether the system is in a stable state or not by judging the monitoring data of the parameters, including oxygen concentration, temperature and wind speed;
step 7, automatically analyzing experimental data;
step 8, judging the experiment ending condition; taking whether the temperature of the coal body reaches the set temperature as a condition for finishing the experiment, and returning to the step 4 if the temperature of the coal body does not reach the set temperature; if the end condition is met, sending a data analysis result to a data output system, wherein the data analysis result comprises carbon dioxide adsorption increment, diffusion transport amount, surge amount, wind speed and temperature;
step 9, outputting an experimental result; and displaying the parameter change condition of the whole experiment process by using a data output system.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (4)
1. A goaf carbon dioxide transportation and dissipation experimental device is characterized by comprising a gas mixer, a device body, a monitoring system and a data display system;
the device body comprises a constant temperature box (6), a heating experimental furnace (5) and a draw-out type exhaust fan (7); the heating experimental furnace (5) is used for simulating the internal environment of the goaf, the heating experimental furnace (5) is arranged in the constant temperature box (6), the extraction type exhaust fan (7) is arranged on the outer side of the constant temperature box (6), and an air inlet pipeline of the extraction type exhaust fan (7) penetrates through the constant temperature box (6) and is communicated with the heating experimental furnace (5);
the gas mixer is communicated with the warming experimental furnace (5) through a gas inlet pipeline to provide mixed gas for the warming experimental furnace (5), a one-way valve (10) is arranged on the gas inlet pipeline, the one-way valve (10) is opened when the gas enters the warming experimental furnace (5) from the gas mixer, and the one-way valve (10) is in a relation when the gas reversely flows back;
the monitoring system comprises an automatic control system, a monitoring system (8), a data transmission system, a data processing system and a data output system;
the monitoring system (8) is used for monitoring gas concentration indexes and temperature indexes in the goaf in real time and sending monitored data to the data transmission system;
the data transmission system is used for acquiring real-time data acquired by the monitoring system (8) and sending the real-time data to the data processing system;
the data processing system analyzes the received data, generates decision instructions and respectively sends the decision instructions to the automatic control system, the data output system and the data display system;
the automatic control system automatically controls the flow of the gas mixer and the extraction type exhaust fan (7) according to the received decision instruction;
the data output system sends data to the storage unit according to the received decision instruction pair;
and the data display system performs acousto-optic early warning on the parameters exceeding the initial threshold value by executing the instruction issued by the data processing system, performs graphical display on the state of the current experiment, and displays data in real time.
2. The goaf carbon dioxide transportation and dissipation experimental device is characterized in that the monitoring system (8) comprises a carbon monoxide concentration sensor, an oxygen concentration sensor, a methane concentration sensor, a carbon dioxide concentration sensor, an ethylene concentration sensor, an acetylene concentration sensor, a temperature sensor and a flow sensor, and the sensors are arranged in the warming experimental furnace (5) in a lattice manner;
the data transmission system comprises a data integrator and a data transmission cable, wherein the data integrator simultaneously acquires real-time data of various sensors according to the set sampling interval time, and sends the real-time data to the data processing system through the data transmission cable;
the data processing system comprises a monitoring host, a signal converter, a decoder and a data analyzer, and the data processing system converts and decodes the received data, analyzes the data by the data analyzer, generates a decision instruction and respectively sends the decision instruction to the automatic control system, the data output system and the data display system;
the automatic control system comprises a carbon dioxide flow automatic releaser (9), an oxygen automatic releaser (3) and a controller, wherein the carbon dioxide flow automatic releaser (9), the oxygen automatic releaser (3) and the extraction type exhaust fan (7) are all in communication connection with the controller; the controller automatically controls the concentration of carbon dioxide and oxygen and the flow of the exhaust fan by executing the instruction issued by the data processing system;
the data display system comprises data early warning and screen display, and performs acousto-optic early warning on parameters exceeding an initial threshold value, performs graphic display on the state of the current experiment and displays data in real time by executing an instruction issued by the data processing system.
3. The goaf carbon dioxide transport dissipation experimental facility as claimed in claim 2, wherein the gas mixer comprises a mixing box (4) and a carbon dioxide injection pipe (1) and an oxygen injection pipe (2) communicated with the mixing box (4), and the carbon dioxide flow automatic releaser (9) and the oxygen automatic releaser (3) are respectively arranged on the carbon dioxide injection pipe (1) and the oxygen injection pipe (2).
4. The goaf carbon dioxide transport dissipation experimental facility as claimed in claim 3, wherein said automatic carbon dioxide flow releaser (9) and automatic oxygen releaser (3) are flow control valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010717579.9A CN111830233A (en) | 2020-07-23 | 2020-07-23 | Goaf carbon dioxide transport and dissipation experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010717579.9A CN111830233A (en) | 2020-07-23 | 2020-07-23 | Goaf carbon dioxide transport and dissipation experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111830233A true CN111830233A (en) | 2020-10-27 |
Family
ID=72926080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010717579.9A Pending CN111830233A (en) | 2020-07-23 | 2020-07-23 | Goaf carbon dioxide transport and dissipation experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111830233A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063715A (en) * | 2021-03-29 | 2021-07-02 | 华北科技学院(中国煤矿安全技术培训中心) | Goaf carbon dioxide regulation and control experiment system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251894A (en) * | 2014-09-22 | 2014-12-31 | 山西潞安环保能源开发股份有限公司 | Testing device for simulating operation of filling CO2 into mine gob area for preventing and extinguishing fire |
| CN104296956A (en) * | 2014-09-09 | 2015-01-21 | 中国矿业大学 | Sublevel caving/mining longwall face goaf flow filed simulation test device and method |
| CN107976395A (en) * | 2017-12-21 | 2018-05-01 | 西安科技大学 | CO in loose coal2Osmosis system measurement device and its method |
| CN110706470A (en) * | 2019-10-22 | 2020-01-17 | 华北科技学院 | Wireless monitoring system and method for spontaneous combustion of coal in goaf |
| CN111650242A (en) * | 2020-06-30 | 2020-09-11 | 湖南科技大学 | Device and method for detecting influence of spontaneous combustion heat and gas production characteristics of coal on gas concentration field |
-
2020
- 2020-07-23 CN CN202010717579.9A patent/CN111830233A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296956A (en) * | 2014-09-09 | 2015-01-21 | 中国矿业大学 | Sublevel caving/mining longwall face goaf flow filed simulation test device and method |
| CN104251894A (en) * | 2014-09-22 | 2014-12-31 | 山西潞安环保能源开发股份有限公司 | Testing device for simulating operation of filling CO2 into mine gob area for preventing and extinguishing fire |
| CN107976395A (en) * | 2017-12-21 | 2018-05-01 | 西安科技大学 | CO in loose coal2Osmosis system measurement device and its method |
| CN110706470A (en) * | 2019-10-22 | 2020-01-17 | 华北科技学院 | Wireless monitoring system and method for spontaneous combustion of coal in goaf |
| CN111650242A (en) * | 2020-06-30 | 2020-09-11 | 湖南科技大学 | Device and method for detecting influence of spontaneous combustion heat and gas production characteristics of coal on gas concentration field |
Non-Patent Citations (1)
| Title |
|---|
| 邵昊 等: "二氧化碳和氮气对煤自燃性能影响的对比试验研究", 《煤炭学报》, 30 November 2014 (2014-11-30), pages 2244 - 2249 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063715A (en) * | 2021-03-29 | 2021-07-02 | 华北科技学院(中国煤矿安全技术培训中心) | Goaf carbon dioxide regulation and control experiment system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111830234A (en) | Goaf carbon dioxide transport and dissipation experimental method | |
| CN102287223B (en) | Integrated life security device of refuge chamber or life-saving compartment based on PID (proportion-integration-differentiation)) integrated control | |
| CN207717355U (en) | A kind of safety valve ultralow temperature checking table | |
| CN107192794B (en) | Device for identifying underground CO source of coal mine | |
| CN106066291A (en) | CO2displacement shale gas and shale are to shale gas or CO2absorption analytic simulation test System and method for | |
| CN103714739B (en) | A kind of step-down air pressure becomes the fire test case of oxygen concentration | |
| CN112802389A (en) | Multifunctional tunnel fire test platform with communication flue | |
| CN201628698U (en) | Biogas detector | |
| CN206236254U (en) | A kind of Intelligent household gas monitoring processing system | |
| CN111830233A (en) | Goaf carbon dioxide transport and dissipation experimental device | |
| CN104989455B (en) | Mine gas and coal fire collaboration prevention and control method | |
| CN202165076U (en) | Laser gas analysis positive pressure explosion-proof comprehensive logging instrument | |
| CN205620105U (en) | Outer ventilation of building of carbon dioxide spike and measuring device that takes a breath | |
| CN112880932A (en) | Method for detecting sealing performance of fireproof plugging of cable shaft at normal temperature | |
| CN208060461U (en) | To the measurement device of multicomponent gas adsorption-desorption characteristics in Coal Self-ignition Process | |
| CN209087419U (en) | A kind of anti-hydrogen-oxygen blasting device and anti-hydrogen-oxygen blasting system | |
| CN103134903A (en) | Atmosphere hydrogen concentration detector based on injection principle | |
| CN116517631A (en) | Active site-based method for dividing spontaneous combustion dangerous areas of magma erosion coal body | |
| CN202757917U (en) | Device for detecting oxidation capacity of denitration system catalysts for elemental mercury | |
| CN206862708U (en) | Engine plateau simulation system discharge sampling and testing equipment | |
| AU2021100797A4 (en) | Environmental detection device and method | |
| CN107290474A (en) | A kind of coal spontaneous combustion heating research device and method based on PLC monitoring | |
| CN114878712A (en) | Toxic gas analysis device for plateau blasting explosive formula design | |
| CN112502679A (en) | Oil displacement experimental device and oil displacement experimental method | |
| CN221078523U (en) | Improved device of closed hot furnace experimental device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201027 |
|
| RJ01 | Rejection of invention patent application after publication |