CN105588870A - Device and method for detecting fire zone of coal field on basis of sulfur isotope component ratio - Google Patents
Device and method for detecting fire zone of coal field on basis of sulfur isotope component ratio Download PDFInfo
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Abstract
The invention discloses a device and a method for detecting a fire zone of a coal field on the basis of a sulfur isotope component ratio. The device comprises a gas suction lever, a gas guide hose, a gas suction and inflation pump, a drying barrel, a gas collecting bag and an isotope mass spectrometer. The gas suction lever inserted into the ground surface sucks gas in the ground surface, the gas is conveyed to the gas suction and inflation pump through the gas guide hose, gas pumped out by the gas suction and inflation pump enters the drying barrel through the gas guide hose to be dried, the gas dried by the drying barrel is guided into the gas collecting bag through the gas guide hose, the sulfur isotope component ratio of the gas in the gas collecting bag is calculated through the isotope mass spectrometer, whether spontaneous combustion happens to the coal seam below a measuring point is judged by comparing the sulfur isotope component ratio with a sulfur isotope component ratio of raw coal, and the purpose of enclosing the fire zone of the coal field is achieved through integration of information of measuring points. The device is simple in structure, convenient to operate and low in use cost.
Description
Technical field
The present invention relates to a kind of coalfield flame range sniffer and method based on sulfur isotope ratio of component, belong to security fields, coalfield,Be particularly useful for cranny development coalfield flame range.
Background technology
Coal is present and Chinese main energy sources in significant period of time from now on. But the coal resources of China are subject to certainly always deeplyThe threat that combustion is got angry, exists a large amount of in provinces (autonomous region) such as Xinjiang of China, the Inner Mongol, Shanxi, Ningxia, Gansu, QinghaiCoalfield flame range. Show according to data, China's mine more than half has spontaneous combustion area or has spontaneous fire hazardous area. Freely burning fire is notOnly have a strong impact on and threatening Safety of Coal Mine Production, freeze a large amount of coal resources simultaneously. According to the preliminary statistics, due to spontaneous combustionof coalMore than the fat coal loss amount causing has reached 4,200,000,000 t, existing still with the speed increase of 2000～3,000 ten thousand t/a, cause and affected by itDull resource reserve exceed 200,000,000 t/a, the indirect loss causing thus, such as land resource, atmosphere pollution, natural, ecological ringThe impact that border and humanity activities etc. are subject to is difficult to estimate especially. Therefore the Chinese government classifies spontaneous combustionof coal as in Agenda 21One of major natural disasters type.
The prerequisite that coalfield flame range is administered is the position of finding combustion zone accurately, and then formulates the scheme of putting out a fire targetedly, puts out Coal Fire FieldsDistrict. If can not precisely draw a circle to approve Coal Fire Fields zone position, not only do not reach fire extinguishing effect, also can bring potential safety hazard to fire-fighting work.At present, mainly contain remote sensing, earth's surface thermometry, probing method, electrical method, magnetic method and survey radon for the detection method of determining coalfield flame rangeMethod. The whole bag of tricks is each tool pluses and minuses all. Remote sensing technique is applicable to the large-area coalfield of delineation flame range, but institute's obtaining information is earth's surface letterBreath, cannot effectively survey underground coal fire, and have the problem of lack of resolution; Earth's surface thermometric reaction speed is fast, surveysTemperature scope is large, but workload is large, and the length that expends time in is carried out thermometric work and had danger above flame range. And buried depth 30mFollowing coalfield flame range may show without heat anomaly on earth's surface; Drilling method is by after flame range construction drill, according to borehole temperatureHeight differentiate distribution and the development degree of flame range; The method is the most direct method of one, but due to the thermal conductivity of coal petrographyPoor, for realize flame range compared with accurate detection, need be in the intensive construction drill of whole detecting area (general pitch-row is less than 10m), its workAmount is large, and cost is high, and not easy-to-use the method completes the task that large area flame range is surveyed; Electrical method and magnetic method because of be subject to the earth stray electrical current,The multifactorial interference such as magnetic field, mountain area complex-terrain, make the data interpretation of multi-solution very difficult, and magnetic method is by surveying fireThe thermoremanent magnetism that district burnt rock generates is drawn a circle to approve flame range border, but burnt rock generally only could produce and shows after temperature is higher than 400 DEG CWork thermoremanent magnetism, therefore, magnetic cannot meet 400 DEG C of detection requirements with lower area.
Survey radon method by the detection of detecting area radon element being differentiated to the distribution situation of coalfield flame range, think that the concentration of radon element is got over big fireDistrict's development degree is more serious, but because radon element is present in the country rock of coal seam, the not direct product of coal combustion, soShortcomings in the delineation of coalfield flame range.
According to the Characteristics of The Sulfur Isotopic Composition of CHINESE COAL and coal-fired process Sulfur Isotope Fractionation result of study, although show different regionsThe sulfur content in coal seam has a long way to go, but in coal combustion process, there will be the isotope fractionation phenomenon of sulphur, and coal combustion dischargesDuring out in gas, sulfur isotope forms, raw coal has gently relatively34The phenomenon of S, this kind of phenomenon is for passing through Sulfur Isotope Fractionation phenomenonSurvey coalfield flame range theoretical foundation is provided. With respect to surveying radon method, SO2For coal combustion directly generates product, for surveying coalField flame range has more advantage. And show according to research, in combustion gas,34S/32S component ratio is lower than in coal sample34S/32S groupDivide ratio more than 4 ‰.
Summary of the invention
Technical problem: the object of the invention is to overcome existing methods deficiency, a kind of features simple structure, easy to operate, use are providedCoalfield flame range sniffer and method that cost is low.
Technical scheme: the coalfield flame range sniffer based on sulfur isotope ratio of component of the present invention, comprises isotope mass spectrometer, alsoThe inflating pump of bleeding, drying and the gas collection bag that comprise air exhaust rod, be connected successively with air exhaust rod afterbody with soft air-guide pipe, in gas collection bagGas carry out analytical calculation the Output rusults of sulfur isotope component by isotope mass spectrometer;
Described air exhaust rod comprises the hollow cylinder body of rod and filled circles cone head, and the hollow cylinder body of rod and filled circles cone head connectOn the body of rod at the place of connecing, have multiple annular grooves, in each annular groove, have multiple aspirating holes; Hollow cylinder body of rod afterbody leavesGas outlet.
Described multiple annular grooves are 2-4, and multiple aspirating holes of offering in each annular groove are four, are arranged symmetrically with.
The coalfield flame range detection method based on sulfur isotope ratio of component that uses said apparatus, comprises the steps:
A. within continuous five days, split extraction coal and sample, once a day, each 1000g, mixes rear sample preparation by five parts of coal samples,Use isotope mass spectrometer to measure total sulfur in coal sample34S/32S content ratio;
B. in production zone is treated in coalfield, according to 20m × 20m grid division, grid node is defined as measuring point;
C. insert air exhaust rod at measuring point place, insert the earth's surface degree of depth and be about 700mm;
D., after inserting air exhaust rod, by near earth's surface sealing air exhaust rod, then connect soft air-guide pipe and bleed inflating pump;
E. open the inflating pump of bleeding, after 1 minute, gas collection bag is accessed to giving vent to anger of the inflating pump of bleeding by soft air-guide pipe until pump workMouthful, treat that gas collection bag is full of, sealing gas collection sack numbering;
F. repeating step c, d, e, completes the work of bleeding of all measuring points in order;
G. use isotope mass spectrometer to measure respectively in the interior gas of each measuring point gas collection bag34S/32S content ratio, and respectively with step aIn middle surveyed coal sample34S/32S content ratio result contrasts, when in certain measuring point gas34S/32S content ratio is lower than in coal sample34S/32S content ratio 4 ‰ o'clock, can assert that this measuring point below exists burning flame range.
Beneficial effect: owing to having adopted technique scheme, the present invention, according in coal combustion process, there will be the isotope of sulphur to divideHeat up in a steamer phenomenon, in the gas that coal combustion discharges, in sulfur isotope composition, coal relatively used has enrichment32Showing of S light isotopeResemble, because all contain element sulphur in all coal seams, wherein element sulphur is that coal combustion directly generates product, compared to side radon method, standardExactness is higher. In addition, the present invention can make up ground infrared measurement of temperature and the deficiency of remote detecting method in investigation depth, completesThe detection mission of darker coalfield flame range. Survey compared to electrical method, magnetic method, this apparatus structure is simple, easy to operate, can remove cloth fromPut the puzzlement of a large amount of surveys line, and due to without high voltage and electric current, improved the security in detection process. In sum,These apparatus and method have more advantage for surveying coalfield flame range.
Brief description of the drawings
Fig. 1 is the coalfield flame range sniffer structural representation based on sulfur isotope ratio of component.
In figure: air exhaust rod 1, soft air-guide pipe 2, the inflating pump 3 of bleeding, drying 4, gas collection bag 5, isotope mass spectrometer 6.
Detailed description of the invention
Below in conjunction with the embodiment in accompanying drawing, the invention will be further described:
Coalfield flame range sniffer based on sulfur isotope ratio of component of the present invention, comprises isotope mass spectrometer 6, air exhaust rod 1, useThe inflating pump 3 of bleeding, drying 4 and gas collection bag 5 that soft air-guide pipe 2 is connected successively with air exhaust rod 1 afterbody, the gas in gas collection bag 5Body carries out analytical calculation the Output rusults of sulfur isotope component by isotope mass spectrometer 6;
Described air exhaust rod 1 comprises the hollow cylinder body of rod and filled circles cone head, the hollow cylinder body of rod and filled circles cone headOn the body of rod of junction, have multiple annular grooves, in each annular groove, have multiple aspirating holes; Hollow cylinder body of rod afterbody staysThere is gas outlet. Described multiple annular grooves are 2-4, and multiple aspirating holes of offering in each annular groove are four, symmetryArrange.
Described air exhaust rod is made up of the hollow cylinder on top and the filled circles cone of bottom, and preferably cylinder head factory is 750mm,The long 100mm of cone, hollow cylinder overall diameter 45mm, thickness 10mm; Cylinder bottom has three near near conePlace's diameter is less than the groove on top, preferably groove hollow cylinder overall diameter 35mm, thickness 10mm, long 15mm; OftenIndividual circular groove surrounding is arranged symmetrically with four aspirating holes, and preferably aspirating hole diameter is 10mm; Column top leaves gas outlet,Mouthful diameter of can preferably going out is 20mm. Described air exhaust rod is connected with the inflating pump of bleeding through soft air-guide pipe, and the inflating pump of bleeding is by leadingGas flexible pipe is connected with drying, and drying is connected with gas collection bag by soft air-guide pipe, and in gas collection bag, gas is entered by isotope mass spectrometerAnalytical calculation the Output rusults of row sulfur isotope component.
Coalfield flame range detection method based on sulfur isotope ratio of component of the present invention, concrete steps are as follows:
A. within continuous five days, split extraction coal and sample, once a day, each 1000g, mixes rear sample preparation by five parts of coal samples,Use isotope mass spectrometer to measure total sulfur in coal sample34S/32S content ratio;
B. in production zone is treated in coalfield, according to 20m × 20m grid division, grid node is defined as measuring point;
C. insert air exhaust rod 1 at measuring point place, insert the earth's surface degree of depth and be about 700mm;
D., after inserting air exhaust rod 1, by near earth's surface sealing air exhaust rod, then connect soft air-guide pipe 2 and bleed inflating pump 3;
E. open the inflating pump 3 of bleeding, after 1 minute, gas collection bag 5 is accessed to the inflating pump 3 of bleeding by soft air-guide pipe 2 until pump workGas outlet, treat that gas collection bag 5 is full of, sealing gas collection sack numbering;
F. repeating step c, d, e, completes the work of bleeding of all measuring points in order;
G. use isotope mass spectrometer to measure respectively in the interior gas of each measuring point gas collection bag34S/32S content ratio, and respectively with step aIn middle surveyed coal sample34S/32S content ratio result contrasts, when in certain measuring point gas34S/32S content ratio is lower than in coal sample34S/32S content ratio 4 ‰ o'clock, can assert that this measuring point below exists burning flame range. Comprehensive each measuring point information and then reach circleDetermine coalfield flame range.
Claims (3)
1. the coalfield flame range sniffer based on sulfur isotope ratio of component, comprise isotope mass spectrometer (6), it is characterized in that: the inflating pump of bleeding (3), drying (4) and the gas collection bag (5) that also comprise air exhaust rod (1), be connected successively with air exhaust rod (1) afterbody with soft air-guide pipe (2), the gas in gas collection bag (5) carries out analytical calculation the Output rusults of sulfur isotope component by isotope mass spectrometer (6);
Described air exhaust rod (1) comprises the hollow cylinder body of rod and filled circles cone head, on the body of rod of the hollow cylinder body of rod and filled circles cone head junction, has multiple annular grooves, has multiple aspirating holes in each annular groove; Hollow cylinder body of rod afterbody leaves gas outlet.
2. a kind of coalfield flame range sniffer based on sulfur isotope ratio of component according to claim 1, is characterized in that: described multiple annular grooves are 2-4, and multiple aspirating holes of offering in each annular groove are four, are arranged symmetrically with.
3. right to use requires the coalfield flame range detection method based on sulfur isotope ratio of component of device described in 1, it is characterized in that, comprises the steps:
A. within continuous five days, split extraction coal and sample, once a day, each 1000g, mixes rear sample preparation by five parts of coal samples, uses isotope mass spectrometer to measure total sulfur in coal sample34S/32S content ratio;
B. in production zone is treated in coalfield, according to 20m × 20m grid division, grid node is defined as measuring point;
C. insert air exhaust rod (1) at measuring point place, insert the earth's surface degree of depth and be about 700mm;
D. insert air exhaust rod (1) afterwards, by near earth's surface sealing air exhaust rod, then connect soft air-guide pipe (2) and bleed inflating pump (3);
E. open the inflating pump of bleeding (3), after 1 minute, gas collection bag (5) is accessed to the gas outlet of inflating pump (3) of bleeding until pump work by soft air-guide pipe (2), treat that gas collection bag (5) is full of, sealing gas collection sack numbering;
F. repeating step c, d, e, completes the work of bleeding of all measuring points in order;
G. use isotope mass spectrometer to measure respectively in the interior gas of each measuring point gas collection bag34S/32S content ratio, and respectively with step a in survey in coal sample34S/32S content ratio result contrasts, when in certain measuring point gas34S/32S content ratio is lower than in coal sample34S/32S content ratio 4 ‰ o'clock, can assert that this measuring point below exists burning flame range.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610003775.3A CN105588870B (en) | 2016-01-04 | 2016-01-04 | A kind of coal-field fire detection device and method based on sulfur isotope component ratio |
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| CN201610003775.3A CN105588870B (en) | 2016-01-04 | 2016-01-04 | A kind of coal-field fire detection device and method based on sulfur isotope component ratio |
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| CN105588870B CN105588870B (en) | 2018-07-20 |
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| CN111366686A (en) * | 2020-03-31 | 2020-07-03 | 湖南科技大学 | Method for judging coal mine spontaneous combustion area based on detection of C14 radioactive quantity |
| CN113047906A (en) * | 2021-03-08 | 2021-06-29 | 中国矿业大学 | Spontaneous combustion target positioning method for coal in goaf |
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| CN111366686A (en) * | 2020-03-31 | 2020-07-03 | 湖南科技大学 | Method for judging coal mine spontaneous combustion area based on detection of C14 radioactive quantity |
| CN113047906A (en) * | 2021-03-08 | 2021-06-29 | 中国矿业大学 | Spontaneous combustion target positioning method for coal in goaf |
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