CN103954647A - Performance test device of fire preventing and extinguishing hot rod for coal spontaneous combustion - Google Patents
Performance test device of fire preventing and extinguishing hot rod for coal spontaneous combustion Download PDFInfo
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- CN103954647A CN103954647A CN201410186179.4A CN201410186179A CN103954647A CN 103954647 A CN103954647 A CN 103954647A CN 201410186179 A CN201410186179 A CN 201410186179A CN 103954647 A CN103954647 A CN 103954647A
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Abstract
The invention provides a performance test device of a fire preventing and extinguishing hot rod for coal spontaneous combustion. The performance test device comprises a box body, a hot rod, a heating system and a temperature measurement analysis and control system; the heating system comprises a temperature control box and a heater electrically connected with the temperature control box; the temperature measurement analysis and control system comprises a temperature inspecting instrument, a control and analysis unit and a plurality of temperature measurement resistors, and the temperature measurement resistors are armored; the heater, an evaporation segment of the hot rod and the plurality of temperature measurement resistors are arranged in a test coal sample of the box body, and different distances are respectively kept between the temperature measurement resistors and the evaporation segment of the hot rod; the plurality of temperature measurement resistors are respectively connected with the temperature inspecting instrument through signal lines, and each signal line is wrapped by Teflon; the temperature inspecting instrument is used for converting resistance signals output by the temperature measurement resistors into temperature signals and transmitting the temperature signals to the control and analysis unit. The performance test device provided by the invention is beneficial for mastering the performance parameters of the hot rod for preventing and treating spontaneous combustion of coal piles, and has important guiding significance for enriching the prevention and treatment technological means of coal spontaneous combustion.
Description
Technical field
The present invention relates to the preventing and extinguishing fire technology field of loose coal rock mass spontaneous combustion, relate in particular to the anti-fire extinguishing hot pin of a kind of coal spontaneous combustion performance test experimental apparatus.
Background technology
China has more than 90% coal seam to belong to spontaneous combustion or spontaneous combustion coal layer, and more than 80% colliery exists spontaneous fire danger.According to incompletely statistics, State owned coal mine accumulates gangue total amount and reaches 5,000,000,000 tons, forms more than 1500 of large-scale waste dump, takes up an area 1.5 ten thousand hectares, wherein has more than 300 to have spontaneous combustion danger.These coal gangue hills through exposing to the weather throughout the year, rain drop erosion, weathering decompose, the long-term smog of self-ignition coal gangue hill curls up, and discharges a large amount of CO, CO to atmosphere
2, SO
2deng gas, atmosphere pollution, destruction ecologic environment, serious also can be accidents caused, brings about great losses.As the blast of Shang Yao ore deposit, Gansu in 1975 waste dump, erupt high hundred meters with the red-hot gangue of dense smoke, 500 DEG C of 200m scope Nei Wenduda, the trees within the scope of 2km are all burnt, 12km
2in scope, air is heavily polluted, and the flue dust a few days is not loose, causes 20 people's death, more than 40 people's severe injuries.Spontaneous combustion of coal gangue hill is seriously contained the sustainable development of coal enterprise, and along with the enhancing of socioeconomic development and people's environmental consciousness, the social and environmental problems that coal gangue hill causes has become thorny problem urgently to be resolved hurrily.
The conventional extinguishing method of existing Coal Gangue Heap has excavation to extinguish method, and the method scope of application is little, and quantities is relatively large, cannot carry out large area and peel off fire extinguishing; Surface coverage method integument is prone to crack gas leakage and resume combustion needs the later stage constantly to safeguard; Dry ice is put out a fire, fire-retardant medicament extinguishing method expense is high; Deep layer fluid injection fire-fighting method is relatively high to technology and technological requirement.In view of the limitation of the existence of conventional means, propose gangue spontaneous combustion based on hot pin know-why and prevent and treat new technology, have by hot pin have a narrow range of temperature, the characteristic such as heat transfer capacity is large, isothermal, the heat in coal gangue hill is derived in time, thereby destroy accumulation of heat environment, control spontaneous combustion of coal gangue hill.
But, hot pin is not moved in dump in coal spontaneous combustion prevention and control field the experimental provision that heat drop temperature ability is studied at present,
Summary of the invention
In order to solve existing technical matters in background technology, the present invention proposes a kind of simple in structure, cost is lower and can realize the anti-fire extinguishing hot pin of the coal spontaneous combustion performance test experimental apparatus without post management, the optimal performance parameter that distribution influence characteristic for testing research hot pin to dump internal temperature field, the effective temperature-reducing radius of determining hot pin, the refrigeratory capacity of calculating hot pin and grasp hot pin dispel the heat at dump, provides foundation for the design of tube pitch between hot pin module with to dump and spontaneous combustion of coal gangue hill control.
Technical solution of the present invention is:
The anti-fire extinguishing hot pin of coal spontaneous combustion performance test experimental apparatus, its special character is: comprise casing, hot pin, heating system and thermometric analysis control system;
Hot pin comprises evaporator section and condensation segment;
Heating system comprises temperature control box, to the power supply unit of temperature control box power supply and the well heater being electrically connected with temperature control box; Experiment coal sample is housed in casing;
Thermometric analysis control system comprises temperature polling instrument, control analysis unit and multiple temperature detecting resistance, temperature detecting resistance armouring;
The evaporator section of described well heater, hot pin and multiple temperature detecting resistance are all arranged in the experiment coal sample of casing, and each temperature detecting resistance keeps respectively the distance different from the evaporator section of hot pin;
Described multiple temperature detecting resistance is connected by signal wire respectively and between temperature polling instrument, and every signal line is all used teflon-coated; Temperature polling instrument is for converting the resistance signal of temperature detecting resistance output temperature signal to and this temperature signal is transferred to control analysis unit.
Based on technique scheme, the present invention also makes following optimization and restriction:
In above-mentioned temperature control box, be provided with auxiliary reclay and temperature controller, on described well heater, be separately provided with separately temperature detecting resistance, this temperature detecting resistance is connected with the Gather and input end of temperature controller by signal wire, and the part that this signal wire is positioned at casing is enclosed with teflon; Well heater is connected with power supply unit by auxiliary reclay, and the control output end of temperature controller is connected with auxiliary reclay for controlling the break-make of auxiliary reclay.
Above-mentioned casing comprises internal layer and skin, is provided with heat-preservation cotton felt between internal layer and skin.
The temperature signal that said temperature logging converts to transfers to control analysis unit by RS232 interface or RS485 interface.
In above-mentioned temperature control box, be also provided with the power on/off pilot lamp, earth leakage protective device and the A.C. contactor that are all connected with power supply unit.
Above-mentioned casing is rectangular-shaped, and internal layer and the skin of casing are corrosion resistant plate.
Said temperature logging Shi32 road high-precision intelligent temperature polling instrument, the temperature detecting resistance being connected with temperature polling instrument has 25-32, and the connection between described each temperature detecting resistance and temperature polling instrument adopts two-wire system wiring or three-wire system wiring.
Above-mentioned hot pin is Carbon Steel-water hot pin, and the condensation segment of hot pin is provided with radiating fin, and radiating fin is Round fin, ring-type fin, helical fin, straight rib or pin rib, hot pin length is 500～15000mm, preferably 1500mm, the caliber of hot pin is 25～150mm, the wall thickness of hot pin is 1～10mm.
Above-mentioned well heater is panel heater, and casing comprises 6 sidewalls, and well heater is bolted on a sidewall of casing, and well heater is of a size of 600 × 500mm, thickness 5mm; The thickness of 6 sidewalls of casing is 10mm, and the thickness of corrosion resistant plate is 1mm, and casing internal diameter size is X=800mm, Y=600mm, Z=500mm.
The present invention has following technique effect:
1, utilize the heat transfer property of hot pin uniqueness, adopt the hot pin performance test experimental apparatus of high-temperature-resistant thermal-insulation material construction control coal spontaneous combustion, dump temperature-rise period under simulation hot pin active cooling conditions, adopt temperature detecting resistance collecting temperature signal, precision is high, reaction velocity is fast, has realized the anti-fire extinguishing hot pin of the coal spontaneous combustion performance test experimental system detecting without post management automatic on-line;
2, the present invention is simple in structure, and operation is more simple, convenient;
3, temperature control of the present invention, also from existing artificial setting, changes temperature automatic detecting and artificial setting into, makes the control of temperature-rise period temperature more accurate.By the present invention, the dump temperature field under hot pin active cooling conditions is studied, set up the model of hot pin to dump cooling, the control that can be dump and spontaneous combustion of coal gangue hill provides good guidance, and enriching China has coal spontaneous combustion preventing and extinguishing fire technology means now.
4, the present invention contributes to grasp hot pin self-ignition of coal pile is prevented and treated the performance parameter of aspect, has great importance to enriching coal spontaneous combustion Prevention Technique means.
Brief description of the drawings
Fig. 1 is the anti-fire extinguishing hot pin of coal spontaneous combustion of the present invention performance test experimental apparatus structural representation;
Fig. 2 is that the A-A of Fig. 1 is to view;
Fig. 3 is the partial enlarged drawing at B place in Fig. 1;
Reference numeral:
1-temperature control box; 2-panel heater; 3-hot pin; 4-skin; 5-heat-preservation cotton felt; 6-temperature detecting resistance; 7-temperature polling instrument; 8-control analysis unit; The power on/off pilot lamp of 9-; 10-start button; 11-RS232 interface; 12-preformed hole; 13-bolt; 14-power supply unit; 15-temperature controller; 16-auxiliary reclay, 17-internal layer.
Embodiment
The invention provides the anti-fire extinguishing hot pin of a kind of coal spontaneous combustion performance test experimental apparatus, as Fig. 1, comprise casing, hot pin 3, heating system and thermometric analysis control system;
Heating system comprises temperature control box 1, to the power supply unit 14 of temperature control box power supply and the well heater being electrically connected with temperature control box, well heater can adopt panel heater 2, temperature control box is in order to the temperature of control heater; Experiment coal sample is housed in casing;
Hot pin comprises evaporator section and condensation segment; Hot pin can adopt Carbon Steel-water hot pin, and hot pin working temperature is between 0～300 DEG C.The condensation segment of hot pin is provided with radiating fin, radiating fin is Round fin, ring-type fin, helical fin, straight rib or pin rib, can helical fin be welded on to condensation segment by alternating-current resistance, hot pin length is 500～15000mm, preferably 1500mm, the caliber of hot pin is 25～150mm, and the wall thickness of hot pin is 1～10mm.Hot pin caliber is selected DN20-
and DN32-
weldless steel tube, thickness 3mm, the distilled water containing corrosion inhibiter is poured in inside; It is 700mm (chemistry and PROCESS FOR TREATMENT are carried out by standard in inside) that hot pin condensation segment adds finned tube length; Fin height 11.17mm, thickness 0.54mm, spacing of fin 4.03mm; Fin outer round surface is smooth, imperforation; Hot pin outside surface should strictly be processed, and has good reflection, radiation and antiseptic property; Hot pin mechanical strength: yield strength > 290MPa, tensile strength > 480MPa, length growth rate > 23%, module of anti-bending section: > 30441mm
3.According to different experimental conditions, select different size hot pin.
Thermometric analysis control system comprises temperature polling instrument 7, control analysis unit 8 and multiple temperature detecting resistance 6, temperature detecting resistance armouring;
The evaporator section of well heater, hot pin and multiple temperature detecting resistance are all arranged in the experiment coal sample of casing, and each temperature detecting resistance keeps respectively the distance different from the evaporator section of hot pin; Multiple temperature detecting resistances are connected by signal wire respectively and between temperature polling instrument, and the connection between each temperature detecting resistance and temperature polling instrument adopts two-wire system wiring or three-wire system wiring, and every signal line is all used teflon-coated; Temperature polling instrument is for converting the resistance signal of temperature detecting resistance output temperature signal to and this temperature signal is transferred to control analysis unit.
Control analysis unit is the control analysis unit of the temperature signal that arrives for storing received.
Wherein, in temperature control box, be provided with start button 10, auxiliary reclay 16 and temperature controller 15, on well heater, be separately provided with separately temperature detecting resistance, this temperature detecting resistance is connected with the Gather and input end of temperature controller by signal wire, the part that this signal wire is positioned at casing is enclosed with teflon, can heatproof 200 degrees Celsius; Well heater is connected with power supply unit by auxiliary reclay, and the control output end of temperature controller is connected with auxiliary reclay for controlling the break-make of auxiliary reclay, and then reaches the object of control heater temperature.
In order to ensure heat insulation effect, casing is provided with case lid, casing comprises internal layer 17 and outer 4, casing thickness is 10mm, between internal layer and skin, can be provided with heat-preservation cotton felt 5 (as high-temperature-resistant thermal-insulation cotton), heat-preservation cotton felt of the present invention has thermal stability and the thermal shock resistance that temperature conductivity is low, thermal capacity is low, good, the function such as heat insulation, fire prevention.The shape of casing can adopt rectangular-shaped, can make by welding manner, and the internal layer of casing and skin all can adopt the thick corrosion resistant plate of 1mm.Casing internal diameter size is X=800mm, Y=600mm, Z=500mm, inner chamber cumulative volume 0.24m
3, 240kg approximately coalings.Casing comprises 6 sidewalls, has the preformed hole 12 that four diameters are 5mm, in order to fixed heater on sidewall of casing.Casing has following features: 1) presentation quality: surfacing, the scar of practicality without prejudice, stain breakage; 2) burning performance: A level is not fired; 3) temperature tolerance: in 800 degree; 4) oxygen index: 0; 5) capacity :≤0.24m
3; 6) physical strength is large, can drum side after coalingging; 7) good heat preservation performance.
The temperature signal that temperature polling instrument converts to can transfer to control analysis unit by RS232 interface 11 or RS485 interface and carry out Storage and Processing, and control analysis unit can be remote computer.
Temperature polling instrument can adopt 32 road high-precision intelligent temperature polling instruments, specifically can adopt 32 road XSLC09 high-precision intelligent temperature polling instruments, and the temperature detecting resistance being connected with temperature polling instrument has 25-32.
In temperature control box, be also provided with the power on/off pilot lamp 9, earth leakage protective device and the A.C. contactor that are all connected with power supply unit, power on/off pilot lamp is for showing the duty of well heater.
As Fig. 2 and Fig. 3, well heater is fixed on the wall box that is provided with preformed hole 12 by bolt 13, and well heater is of a size of 600 × 500mm, thickness 5mm; The thickness of 6 sidewalls of casing is 10mm, and the thickness of corrosion resistant plate is 1mm, and casing internal diameter size is X=800mm, Y=600mm, Z=500mm.
When pressing the start button 10 of temperature-controlled cabinet, connect power supply unit, panel heater is started working, and is arranged on the temperature detecting resistance on well heater, the temperature signal collecting on panel heater is sent in temperature controller, if when temperature exceedes set temperature, auxiliary reclay disconnects automatically, and panel heater quits work, maintain uniform temperature, when temperature on panel heater is during lower than established temperature, auxiliary reclay is connected automatically, and panel heater is started working again.Control panel heater with this and maintain constant heating-up temperature.
Panel heater of the present invention have quick heating, heating evenly, the feature such as good heat conductivity, long service life.Consider the other reasonses such as heat radiation and loss, in device, selecting power is 1500w, and its surface loading can reach 3～4W/cm
2panel heater.Be of a size of 600 × 500mm, thickness 5mm, can carry out one dimension one-way heating to coal sample in chamber.
Temperature detecting resistance of the present invention is selected the thermal resistance (Pt100) of model WZP-020, precision A level, and temperature-measuring range-50 DEG C～250 DEG C, approximately 30 points, can adopt three-wire system wiring, length 1.5m, wire diameter 6mm.
Control analysis of the present invention unit comprises online temperature detection software, can show by computing machine serial port acquisition instrument measurement data and in real time, storage, to storage data march line analysis, curve printing, trend browse, report generation, form editor, report printing, conversion generate TXT/EXCEL file etc.
Control analysis of the present invention unit adopts when remote computer, remote computer be configured to Intel Celeron dual core processor, cpu frequency 2GHz, 500G hard disk, 2G internal memory, operating system is selected Windows7 version, for real time and on line monitoring and data processing and storage.
In the time that use is of the present invention, can there is following operation steps:
1] experiment coal sample is encased in casing, and then buries temperature detecting resistance underground according to certain size in casing, casing upper surface lays refractory wool felt, experiment coal body and air is completely cut off to the data such as position, distance of survey record temperature detecting resistance in dump;
2] by hot pin and panel heater apart from certain distance, be installed into coal body, evaporator section is placed in coal body, condensation segment is placed in air, survey record hot pin and panel heater range data, hot pin evaporator section are imbedded the dimensional data of coal body;
3] operation temperature control box, sets constant heating-up temperature by temperature control instrument, controls the heating-up temperature of panel heater, experiment coal temperature is heated to record heating test duration, observation experiment process data ruuning situation;
4] gather the each measuring point intensification of temperature-rise period temperature data, Treatment Analysis;
Above-mentioned steps 2] in remove hot pin, under other condition same cases, experiment coal sample is carried out to nature intensification, contrast while having hot pin when without hot pin, twice intensification dump heating curve; Set up relevant hot pin moves heat drop temperature mathematical model to dump, and set up relevant hot pin dump is moved to heat drop temperature model, instruct the anti-fire extinguishing engineering of spontaneous combustion of dump and coal gangue hill.
Claims (9)
1. the anti-fire extinguishing hot pin of coal spontaneous combustion performance test experimental apparatus, is characterized in that: comprise casing, hot pin, heating system and thermometric analysis control system;
Hot pin comprises evaporator section and condensation segment;
Heating system comprises temperature control box, to the power supply unit of temperature control box power supply and the well heater being electrically connected with temperature control box; Experiment coal sample is housed in casing;
Thermometric analysis control system comprises temperature polling instrument, control analysis unit and multiple temperature detecting resistance, temperature detecting resistance armouring;
The evaporator section of described well heater, hot pin and multiple temperature detecting resistance are all arranged in the experiment coal sample of casing, and each temperature detecting resistance keeps respectively the distance different from the evaporator section of hot pin;
Described multiple temperature detecting resistance is connected by signal wire respectively and between temperature polling instrument, and every signal line is all used teflon-coated; Temperature polling instrument is for converting the resistance signal of temperature detecting resistance output temperature signal to and this temperature signal is transferred to control analysis unit.
2. the anti-fire extinguishing hot pin of coal spontaneous combustion according to claim 1 performance test experimental apparatus, is characterized in that:
In described temperature control box, be provided with auxiliary reclay and temperature controller, on described well heater, be separately provided with separately temperature detecting resistance, this temperature detecting resistance is connected with the Gather and input end of temperature controller by signal wire, and the part that this signal wire is positioned at casing is enclosed with teflon; Well heater is connected with power supply unit by auxiliary reclay, and the control output end of temperature controller is connected with auxiliary reclay for controlling the break-make of auxiliary reclay.
3. the anti-fire extinguishing hot pin of coal spontaneous combustion according to claim 2 performance test experimental apparatus, is characterized in that: described casing comprises internal layer and skin, is provided with heat-preservation cotton felt between internal layer and skin.
4. the anti-fire extinguishing hot pin of coal spontaneous combustion according to claim 3 performance test experimental apparatus, is characterized in that: the temperature signal that described temperature polling instrument converts to transfers to control analysis unit by RS232 interface or RS485 interface.
5. the anti-fire extinguishing hot pin of coal spontaneous combustion according to claim 3 performance test experimental apparatus, is characterized in that: in described temperature control box, be also provided with the power on/off pilot lamp, earth leakage protective device and the A.C. contactor that are all connected with power supply unit.
6. the anti-fire extinguishing hot pin of coal spontaneous combustion according to claim 5 performance test experimental apparatus, is characterized in that: described casing is rectangular-shaped, and internal layer and the skin of casing are corrosion resistant plate.
7. the anti-fire extinguishing hot pin of coal spontaneous combustion according to claim 6 performance test experimental apparatus, it is characterized in that: described temperature polling instrument Shi32 road high-precision intelligent temperature polling instrument, the temperature detecting resistance being connected with temperature polling instrument has 25-32, and the connection between described each temperature detecting resistance and temperature polling instrument adopts two-wire system wiring or three-wire system wiring.
8. the anti-fire extinguishing hot pin of coal spontaneous combustion according to claim 7 performance test experimental apparatus, it is characterized in that: described hot pin is Carbon Steel-water hot pin, the condensation segment of hot pin is provided with radiating fin, radiating fin is Round fin, ring-type fin, helical fin, straight rib or pin rib, hot pin length is 500～15000mm, preferably 1500mm, the caliber of hot pin is 25～150mm, the wall thickness of hot pin is 1～10mm.
9. the anti-fire extinguishing hot pin of coal spontaneous combustion according to claim 8 performance test experimental apparatus, it is characterized in that: described well heater is panel heater, casing comprises 6 sidewalls, and well heater is bolted on a sidewall of casing, well heater is of a size of 600 × 500mm, thickness 5mm; The thickness of 6 sidewalls of casing is 10mm, and the thickness of corrosion resistant plate is 1mm, and casing internal diameter size is X=800mm, Y=600mm, Z=500mm.
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| CN201410186179.4A CN103954647A (en) | 2014-05-05 | 2014-05-05 | Performance test device of fire preventing and extinguishing hot rod for coal spontaneous combustion |
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| CN201410186179.4A CN103954647A (en) | 2014-05-05 | 2014-05-05 | Performance test device of fire preventing and extinguishing hot rod for coal spontaneous combustion |
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| CN104897723A (en) * | 2015-06-19 | 2015-09-09 | 西安科技大学 | Experiment device for spontaneous combustion characteristic test during coal rock creep process |
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| CN106153674A (en) * | 2016-08-19 | 2016-11-23 | 西安科技大学 | A kind of analog simulation system of underground coal fire evolutionary process |
| CN106990219A (en) * | 2017-04-19 | 2017-07-28 | 西安科技大学 | A kind of coal spontaneous combustion tester |
| CN110108377A (en) * | 2019-04-19 | 2019-08-09 | 西安科技大学 | A kind of dump thermometric cooling grouting device and system |
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